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  1. /*
  2.  * Copyright (c) 2007-2010 Stefano Sabatini
  3.  *
  4.  * This file is part of FFmpeg.
  5.  *
  6.  * FFmpeg is free software; you can redistribute it and/or
  7.  * modify it under the terms of the GNU Lesser General Public
  8.  * License as published by the Free Software Foundation; either
  9.  * version 2.1 of the License, or (at your option) any later version.
  10.  *
  11.  * FFmpeg is distributed in the hope that it will be useful,
  12.  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  13.  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  14.  * Lesser General Public License for more details.
  15.  *
  16.  * You should have received a copy of the GNU Lesser General Public
  17.  * License along with FFmpeg; if not, write to the Free Software
  18.  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
  19.  */
  20.  
  21. /**
  22.  * @file
  23.  * simple media prober based on the FFmpeg libraries
  24.  */
  25.  
  26. #include "config.h"
  27. #include "libavutil/ffversion.h"
  28.  
  29. #include <string.h>
  30.  
  31. #include "libavformat/avformat.h"
  32. #include "libavcodec/avcodec.h"
  33. #include "libavutil/avassert.h"
  34. #include "libavutil/avstring.h"
  35. #include "libavutil/bprint.h"
  36. #include "libavutil/display.h"
  37. #include "libavutil/hash.h"
  38. #include "libavutil/opt.h"
  39. #include "libavutil/pixdesc.h"
  40. #include "libavutil/dict.h"
  41. #include "libavutil/intreadwrite.h"
  42. #include "libavutil/libm.h"
  43. #include "libavutil/parseutils.h"
  44. #include "libavutil/timecode.h"
  45. #include "libavutil/timestamp.h"
  46. #include "libavdevice/avdevice.h"
  47. #include "libswscale/swscale.h"
  48. #include "libswresample/swresample.h"
  49. #include "libpostproc/postprocess.h"
  50. #include "cmdutils.h"
  51.  
  52. const char program_name[] = "ffprobe";
  53. const int program_birth_year = 2007;
  54.  
  55. static int do_bitexact = 0;
  56. static int do_count_frames = 0;
  57. static int do_count_packets = 0;
  58. static int do_read_frames  = 0;
  59. static int do_read_packets = 0;
  60. static int do_show_chapters = 0;
  61. static int do_show_error   = 0;
  62. static int do_show_format  = 0;
  63. static int do_show_frames  = 0;
  64. static int do_show_packets = 0;
  65. static int do_show_programs = 0;
  66. static int do_show_streams = 0;
  67. static int do_show_stream_disposition = 0;
  68. static int do_show_data    = 0;
  69. static int do_show_program_version  = 0;
  70. static int do_show_library_versions = 0;
  71. static int do_show_pixel_formats = 0;
  72. static int do_show_pixel_format_flags = 0;
  73. static int do_show_pixel_format_components = 0;
  74.  
  75. static int do_show_chapter_tags = 0;
  76. static int do_show_format_tags = 0;
  77. static int do_show_frame_tags = 0;
  78. static int do_show_program_tags = 0;
  79. static int do_show_stream_tags = 0;
  80.  
  81. static int show_value_unit              = 0;
  82. static int use_value_prefix             = 0;
  83. static int use_byte_value_binary_prefix = 0;
  84. static int use_value_sexagesimal_format = 0;
  85. static int show_private_data            = 1;
  86.  
  87. static char *print_format;
  88. static char *stream_specifier;
  89. static char *show_data_hash;
  90.  
  91. typedef struct ReadInterval {
  92.     int id;             ///< identifier
  93.     int64_t start, end; ///< start, end in second/AV_TIME_BASE units
  94.     int has_start, has_end;
  95.     int start_is_offset, end_is_offset;
  96.     int duration_frames;
  97. } ReadInterval;
  98.  
  99. static ReadInterval *read_intervals;
  100. static int read_intervals_nb = 0;
  101.  
  102. /* section structure definition */
  103.  
  104. #define SECTION_MAX_NB_CHILDREN 10
  105.  
  106. struct section {
  107.     int id;             ///< unique id identifying a section
  108.     const char *name;
  109.  
  110. #define SECTION_FLAG_IS_WRAPPER      1 ///< the section only contains other sections, but has no data at its own level
  111. #define SECTION_FLAG_IS_ARRAY        2 ///< the section contains an array of elements of the same type
  112. #define SECTION_FLAG_HAS_VARIABLE_FIELDS 4 ///< the section may contain a variable number of fields with variable keys.
  113.                                            ///  For these sections the element_name field is mandatory.
  114.     int flags;
  115.     int children_ids[SECTION_MAX_NB_CHILDREN+1]; ///< list of children section IDS, terminated by -1
  116.     const char *element_name; ///< name of the contained element, if provided
  117.     const char *unique_name;  ///< unique section name, in case the name is ambiguous
  118.     AVDictionary *entries_to_show;
  119.     int show_all_entries;
  120. };
  121.  
  122. typedef enum {
  123.     SECTION_ID_NONE = -1,
  124.     SECTION_ID_CHAPTER,
  125.     SECTION_ID_CHAPTER_TAGS,
  126.     SECTION_ID_CHAPTERS,
  127.     SECTION_ID_ERROR,
  128.     SECTION_ID_FORMAT,
  129.     SECTION_ID_FORMAT_TAGS,
  130.     SECTION_ID_FRAME,
  131.     SECTION_ID_FRAMES,
  132.     SECTION_ID_FRAME_TAGS,
  133.     SECTION_ID_FRAME_SIDE_DATA_LIST,
  134.     SECTION_ID_FRAME_SIDE_DATA,
  135.     SECTION_ID_LIBRARY_VERSION,
  136.     SECTION_ID_LIBRARY_VERSIONS,
  137.     SECTION_ID_PACKET,
  138.     SECTION_ID_PACKETS,
  139.     SECTION_ID_PACKETS_AND_FRAMES,
  140.     SECTION_ID_PACKET_SIDE_DATA_LIST,
  141.     SECTION_ID_PACKET_SIDE_DATA,
  142.     SECTION_ID_PIXEL_FORMAT,
  143.     SECTION_ID_PIXEL_FORMAT_FLAGS,
  144.     SECTION_ID_PIXEL_FORMAT_COMPONENT,
  145.     SECTION_ID_PIXEL_FORMAT_COMPONENTS,
  146.     SECTION_ID_PIXEL_FORMATS,
  147.     SECTION_ID_PROGRAM_STREAM_DISPOSITION,
  148.     SECTION_ID_PROGRAM_STREAM_TAGS,
  149.     SECTION_ID_PROGRAM,
  150.     SECTION_ID_PROGRAM_STREAMS,
  151.     SECTION_ID_PROGRAM_STREAM,
  152.     SECTION_ID_PROGRAM_TAGS,
  153.     SECTION_ID_PROGRAM_VERSION,
  154.     SECTION_ID_PROGRAMS,
  155.     SECTION_ID_ROOT,
  156.     SECTION_ID_STREAM,
  157.     SECTION_ID_STREAM_DISPOSITION,
  158.     SECTION_ID_STREAMS,
  159.     SECTION_ID_STREAM_TAGS,
  160.     SECTION_ID_STREAM_SIDE_DATA_LIST,
  161.     SECTION_ID_STREAM_SIDE_DATA,
  162.     SECTION_ID_SUBTITLE,
  163. } SectionID;
  164.  
  165. static struct section sections[] = {
  166.     [SECTION_ID_CHAPTERS] =           { SECTION_ID_CHAPTERS, "chapters", SECTION_FLAG_IS_ARRAY, { SECTION_ID_CHAPTER, -1 } },
  167.     [SECTION_ID_CHAPTER] =            { SECTION_ID_CHAPTER, "chapter", 0, { SECTION_ID_CHAPTER_TAGS, -1 } },
  168.     [SECTION_ID_CHAPTER_TAGS] =       { SECTION_ID_CHAPTER_TAGS, "tags", SECTION_FLAG_HAS_VARIABLE_FIELDS, { -1 }, .element_name = "tag", .unique_name = "chapter_tags" },
  169.     [SECTION_ID_ERROR] =              { SECTION_ID_ERROR, "error", 0, { -1 } },
  170.     [SECTION_ID_FORMAT] =             { SECTION_ID_FORMAT, "format", 0, { SECTION_ID_FORMAT_TAGS, -1 } },
  171.     [SECTION_ID_FORMAT_TAGS] =        { SECTION_ID_FORMAT_TAGS, "tags", SECTION_FLAG_HAS_VARIABLE_FIELDS, { -1 }, .element_name = "tag", .unique_name = "format_tags" },
  172.     [SECTION_ID_FRAMES] =             { SECTION_ID_FRAMES, "frames", SECTION_FLAG_IS_ARRAY, { SECTION_ID_FRAME, SECTION_ID_SUBTITLE, -1 } },
  173.     [SECTION_ID_FRAME] =              { SECTION_ID_FRAME, "frame", 0, { SECTION_ID_FRAME_TAGS, SECTION_ID_FRAME_SIDE_DATA_LIST, -1 } },
  174.     [SECTION_ID_FRAME_TAGS] =         { SECTION_ID_FRAME_TAGS, "tags", SECTION_FLAG_HAS_VARIABLE_FIELDS, { -1 }, .element_name = "tag", .unique_name = "frame_tags" },
  175.     [SECTION_ID_FRAME_SIDE_DATA_LIST] ={ SECTION_ID_FRAME_SIDE_DATA_LIST, "side_data_list", SECTION_FLAG_IS_ARRAY, { SECTION_ID_FRAME_SIDE_DATA, -1 } },
  176.     [SECTION_ID_FRAME_SIDE_DATA] =     { SECTION_ID_FRAME_SIDE_DATA, "side_data", 0, { -1 } },
  177.     [SECTION_ID_LIBRARY_VERSIONS] =   { SECTION_ID_LIBRARY_VERSIONS, "library_versions", SECTION_FLAG_IS_ARRAY, { SECTION_ID_LIBRARY_VERSION, -1 } },
  178.     [SECTION_ID_LIBRARY_VERSION] =    { SECTION_ID_LIBRARY_VERSION, "library_version", 0, { -1 } },
  179.     [SECTION_ID_PACKETS] =            { SECTION_ID_PACKETS, "packets", SECTION_FLAG_IS_ARRAY, { SECTION_ID_PACKET, -1} },
  180.     [SECTION_ID_PACKETS_AND_FRAMES] = { SECTION_ID_PACKETS_AND_FRAMES, "packets_and_frames", SECTION_FLAG_IS_ARRAY, { SECTION_ID_PACKET, -1} },
  181.     [SECTION_ID_PACKET] =             { SECTION_ID_PACKET, "packet", 0, { SECTION_ID_PACKET_SIDE_DATA_LIST, -1 } },
  182.     [SECTION_ID_PACKET_SIDE_DATA_LIST] ={ SECTION_ID_PACKET_SIDE_DATA_LIST, "side_data_list", SECTION_FLAG_IS_ARRAY, { SECTION_ID_PACKET_SIDE_DATA, -1 } },
  183.     [SECTION_ID_PACKET_SIDE_DATA] =     { SECTION_ID_PACKET_SIDE_DATA, "side_data", 0, { -1 } },
  184.     [SECTION_ID_PIXEL_FORMATS] =      { SECTION_ID_PIXEL_FORMATS, "pixel_formats", SECTION_FLAG_IS_ARRAY, { SECTION_ID_PIXEL_FORMAT, -1 } },
  185.     [SECTION_ID_PIXEL_FORMAT] =       { SECTION_ID_PIXEL_FORMAT, "pixel_format", 0, { SECTION_ID_PIXEL_FORMAT_FLAGS, SECTION_ID_PIXEL_FORMAT_COMPONENTS, -1 } },
  186.     [SECTION_ID_PIXEL_FORMAT_FLAGS] = { SECTION_ID_PIXEL_FORMAT_FLAGS, "flags", 0, { -1 }, .unique_name = "pixel_format_flags" },
  187.     [SECTION_ID_PIXEL_FORMAT_COMPONENTS] = { SECTION_ID_PIXEL_FORMAT_COMPONENTS, "components", SECTION_FLAG_IS_ARRAY, {SECTION_ID_PIXEL_FORMAT_COMPONENT, -1 }, .unique_name = "pixel_format_components" },
  188.     [SECTION_ID_PIXEL_FORMAT_COMPONENT]  = { SECTION_ID_PIXEL_FORMAT_COMPONENT, "component", 0, { -1 } },
  189.     [SECTION_ID_PROGRAM_STREAM_DISPOSITION] = { SECTION_ID_PROGRAM_STREAM_DISPOSITION, "disposition", 0, { -1 }, .unique_name = "program_stream_disposition" },
  190.     [SECTION_ID_PROGRAM_STREAM_TAGS] =        { SECTION_ID_PROGRAM_STREAM_TAGS, "tags", SECTION_FLAG_HAS_VARIABLE_FIELDS, { -1 }, .element_name = "tag", .unique_name = "program_stream_tags" },
  191.     [SECTION_ID_PROGRAM] =                    { SECTION_ID_PROGRAM, "program", 0, { SECTION_ID_PROGRAM_TAGS, SECTION_ID_PROGRAM_STREAMS, -1 } },
  192.     [SECTION_ID_PROGRAM_STREAMS] =            { SECTION_ID_PROGRAM_STREAMS, "streams", SECTION_FLAG_IS_ARRAY, { SECTION_ID_PROGRAM_STREAM, -1 }, .unique_name = "program_streams" },
  193.     [SECTION_ID_PROGRAM_STREAM] =             { SECTION_ID_PROGRAM_STREAM, "stream", 0, { SECTION_ID_PROGRAM_STREAM_DISPOSITION, SECTION_ID_PROGRAM_STREAM_TAGS, -1 }, .unique_name = "program_stream" },
  194.     [SECTION_ID_PROGRAM_TAGS] =               { SECTION_ID_PROGRAM_TAGS, "tags", SECTION_FLAG_HAS_VARIABLE_FIELDS, { -1 }, .element_name = "tag", .unique_name = "program_tags" },
  195.     [SECTION_ID_PROGRAM_VERSION] =    { SECTION_ID_PROGRAM_VERSION, "program_version", 0, { -1 } },
  196.     [SECTION_ID_PROGRAMS] =                   { SECTION_ID_PROGRAMS, "programs", SECTION_FLAG_IS_ARRAY, { SECTION_ID_PROGRAM, -1 } },
  197.     [SECTION_ID_ROOT] =               { SECTION_ID_ROOT, "root", SECTION_FLAG_IS_WRAPPER,
  198.                                         { SECTION_ID_CHAPTERS, SECTION_ID_FORMAT, SECTION_ID_FRAMES, SECTION_ID_PROGRAMS, SECTION_ID_STREAMS,
  199.                                           SECTION_ID_PACKETS, SECTION_ID_ERROR, SECTION_ID_PROGRAM_VERSION, SECTION_ID_LIBRARY_VERSIONS,
  200.                                           SECTION_ID_PIXEL_FORMATS, -1} },
  201.     [SECTION_ID_STREAMS] =            { SECTION_ID_STREAMS, "streams", SECTION_FLAG_IS_ARRAY, { SECTION_ID_STREAM, -1 } },
  202.     [SECTION_ID_STREAM] =             { SECTION_ID_STREAM, "stream", 0, { SECTION_ID_STREAM_DISPOSITION, SECTION_ID_STREAM_TAGS, SECTION_ID_STREAM_SIDE_DATA_LIST, -1 } },
  203.     [SECTION_ID_STREAM_DISPOSITION] = { SECTION_ID_STREAM_DISPOSITION, "disposition", 0, { -1 }, .unique_name = "stream_disposition" },
  204.     [SECTION_ID_STREAM_TAGS] =        { SECTION_ID_STREAM_TAGS, "tags", SECTION_FLAG_HAS_VARIABLE_FIELDS, { -1 }, .element_name = "tag", .unique_name = "stream_tags" },
  205.     [SECTION_ID_STREAM_SIDE_DATA_LIST] ={ SECTION_ID_STREAM_SIDE_DATA_LIST, "side_data_list", SECTION_FLAG_IS_ARRAY, { SECTION_ID_STREAM_SIDE_DATA, -1 } },
  206.     [SECTION_ID_STREAM_SIDE_DATA] =     { SECTION_ID_STREAM_SIDE_DATA, "side_data", 0, { -1 } },
  207.     [SECTION_ID_SUBTITLE] =           { SECTION_ID_SUBTITLE, "subtitle", 0, { -1 } },
  208. };
  209.  
  210. static const OptionDef *options;
  211.  
  212. /* FFprobe context */
  213. static const char *input_filename;
  214. static AVInputFormat *iformat = NULL;
  215.  
  216. static struct AVHashContext *hash;
  217.  
  218. static const char *const binary_unit_prefixes [] = { "", "Ki", "Mi", "Gi", "Ti", "Pi" };
  219. static const char *const decimal_unit_prefixes[] = { "", "K" , "M" , "G" , "T" , "P"  };
  220.  
  221. static const char unit_second_str[]         = "s"    ;
  222. static const char unit_hertz_str[]          = "Hz"   ;
  223. static const char unit_byte_str[]           = "byte" ;
  224. static const char unit_bit_per_second_str[] = "bit/s";
  225.  
  226. static int nb_streams;
  227. static uint64_t *nb_streams_packets;
  228. static uint64_t *nb_streams_frames;
  229. static int *selected_streams;
  230.  
  231. static void ffprobe_cleanup(int ret)
  232. {
  233.     int i;
  234.     for (i = 0; i < FF_ARRAY_ELEMS(sections); i++)
  235.         av_dict_free(&(sections[i].entries_to_show));
  236. }
  237.  
  238. struct unit_value {
  239.     union { double d; long long int i; } val;
  240.     const char *unit;
  241. };
  242.  
  243. static char *value_string(char *buf, int buf_size, struct unit_value uv)
  244. {
  245.     double vald;
  246.     long long int vali;
  247.     int show_float = 0;
  248.  
  249.     if (uv.unit == unit_second_str) {
  250.         vald = uv.val.d;
  251.         show_float = 1;
  252.     } else {
  253.         vald = vali = uv.val.i;
  254.     }
  255.  
  256.     if (uv.unit == unit_second_str && use_value_sexagesimal_format) {
  257.         double secs;
  258.         int hours, mins;
  259.         secs  = vald;
  260.         mins  = (int)secs / 60;
  261.         secs  = secs - mins * 60;
  262.         hours = mins / 60;
  263.         mins %= 60;
  264.         snprintf(buf, buf_size, "%d:%02d:%09.6f", hours, mins, secs);
  265.     } else {
  266.         const char *prefix_string = "";
  267.  
  268.         if (use_value_prefix && vald > 1) {
  269.             long long int index;
  270.  
  271.             if (uv.unit == unit_byte_str && use_byte_value_binary_prefix) {
  272.                 index = (long long int) (log2(vald)) / 10;
  273.                 index = av_clip(index, 0, FF_ARRAY_ELEMS(binary_unit_prefixes) - 1);
  274.                 vald /= exp2(index * 10);
  275.                 prefix_string = binary_unit_prefixes[index];
  276.             } else {
  277.                 index = (long long int) (log10(vald)) / 3;
  278.                 index = av_clip(index, 0, FF_ARRAY_ELEMS(decimal_unit_prefixes) - 1);
  279.                 vald /= pow(10, index * 3);
  280.                 prefix_string = decimal_unit_prefixes[index];
  281.             }
  282.             vali = vald;
  283.         }
  284.  
  285.         if (show_float || (use_value_prefix && vald != (long long int)vald))
  286.             snprintf(buf, buf_size, "%f", vald);
  287.         else
  288.             snprintf(buf, buf_size, "%lld", vali);
  289.         av_strlcatf(buf, buf_size, "%s%s%s", *prefix_string || show_value_unit ? " " : "",
  290.                  prefix_string, show_value_unit ? uv.unit : "");
  291.     }
  292.  
  293.     return buf;
  294. }
  295.  
  296. /* WRITERS API */
  297.  
  298. typedef struct WriterContext WriterContext;
  299.  
  300. #define WRITER_FLAG_DISPLAY_OPTIONAL_FIELDS 1
  301. #define WRITER_FLAG_PUT_PACKETS_AND_FRAMES_IN_SAME_CHAPTER 2
  302.  
  303. typedef enum {
  304.     WRITER_STRING_VALIDATION_FAIL,
  305.     WRITER_STRING_VALIDATION_REPLACE,
  306.     WRITER_STRING_VALIDATION_IGNORE,
  307.     WRITER_STRING_VALIDATION_NB
  308. } StringValidation;
  309.  
  310. typedef struct Writer {
  311.     const AVClass *priv_class;      ///< private class of the writer, if any
  312.     int priv_size;                  ///< private size for the writer context
  313.     const char *name;
  314.  
  315.     int  (*init)  (WriterContext *wctx);
  316.     void (*uninit)(WriterContext *wctx);
  317.  
  318.     void (*print_section_header)(WriterContext *wctx);
  319.     void (*print_section_footer)(WriterContext *wctx);
  320.     void (*print_integer)       (WriterContext *wctx, const char *, long long int);
  321.     void (*print_rational)      (WriterContext *wctx, AVRational *q, char *sep);
  322.     void (*print_string)        (WriterContext *wctx, const char *, const char *);
  323.     int flags;                  ///< a combination or WRITER_FLAG_*
  324. } Writer;
  325.  
  326. #define SECTION_MAX_NB_LEVELS 10
  327.  
  328. struct WriterContext {
  329.     const AVClass *class;           ///< class of the writer
  330.     const Writer *writer;           ///< the Writer of which this is an instance
  331.     char *name;                     ///< name of this writer instance
  332.     void *priv;                     ///< private data for use by the filter
  333.  
  334.     const struct section *sections; ///< array containing all sections
  335.     int nb_sections;                ///< number of sections
  336.  
  337.     int level;                      ///< current level, starting from 0
  338.  
  339.     /** number of the item printed in the given section, starting from 0 */
  340.     unsigned int nb_item[SECTION_MAX_NB_LEVELS];
  341.  
  342.     /** section per each level */
  343.     const struct section *section[SECTION_MAX_NB_LEVELS];
  344.     AVBPrint section_pbuf[SECTION_MAX_NB_LEVELS]; ///< generic print buffer dedicated to each section,
  345.                                                   ///  used by various writers
  346.  
  347.     unsigned int nb_section_packet; ///< number of the packet section in case we are in "packets_and_frames" section
  348.     unsigned int nb_section_frame;  ///< number of the frame  section in case we are in "packets_and_frames" section
  349.     unsigned int nb_section_packet_frame; ///< nb_section_packet or nb_section_frame according if is_packets_and_frames
  350.  
  351.     int string_validation;
  352.     char *string_validation_replacement;
  353.     unsigned int string_validation_utf8_flags;
  354. };
  355.  
  356. static const char *writer_get_name(void *p)
  357. {
  358.     WriterContext *wctx = p;
  359.     return wctx->writer->name;
  360. }
  361.  
  362. #define OFFSET(x) offsetof(WriterContext, x)
  363.  
  364. static const AVOption writer_options[] = {
  365.     { "string_validation", "set string validation mode",
  366.       OFFSET(string_validation), AV_OPT_TYPE_INT, {.i64=WRITER_STRING_VALIDATION_REPLACE}, 0, WRITER_STRING_VALIDATION_NB-1, .unit = "sv" },
  367.     { "sv", "set string validation mode",
  368.       OFFSET(string_validation), AV_OPT_TYPE_INT, {.i64=WRITER_STRING_VALIDATION_REPLACE}, 0, WRITER_STRING_VALIDATION_NB-1, .unit = "sv" },
  369.     { "ignore",  NULL, 0, AV_OPT_TYPE_CONST, {.i64 = WRITER_STRING_VALIDATION_IGNORE},  .unit = "sv" },
  370.     { "replace", NULL, 0, AV_OPT_TYPE_CONST, {.i64 = WRITER_STRING_VALIDATION_REPLACE}, .unit = "sv" },
  371.     { "fail",    NULL, 0, AV_OPT_TYPE_CONST, {.i64 = WRITER_STRING_VALIDATION_FAIL},    .unit = "sv" },
  372.     { "string_validation_replacement", "set string validation replacement string", OFFSET(string_validation_replacement), AV_OPT_TYPE_STRING, {.str=""}},
  373.     { "svr", "set string validation replacement string", OFFSET(string_validation_replacement), AV_OPT_TYPE_STRING, {.str="\xEF\xBF\xBD"}},
  374.     { NULL }
  375. };
  376.  
  377. static void *writer_child_next(void *obj, void *prev)
  378. {
  379.     WriterContext *ctx = obj;
  380.     if (!prev && ctx->writer && ctx->writer->priv_class && ctx->priv)
  381.         return ctx->priv;
  382.     return NULL;
  383. }
  384.  
  385. static const AVClass writer_class = {
  386.     .class_name = "Writer",
  387.     .item_name  = writer_get_name,
  388.     .option     = writer_options,
  389.     .version    = LIBAVUTIL_VERSION_INT,
  390.     .child_next = writer_child_next,
  391. };
  392.  
  393. static void writer_close(WriterContext **wctx)
  394. {
  395.     int i;
  396.  
  397.     if (!*wctx)
  398.         return;
  399.  
  400.     if ((*wctx)->writer->uninit)
  401.         (*wctx)->writer->uninit(*wctx);
  402.     for (i = 0; i < SECTION_MAX_NB_LEVELS; i++)
  403.         av_bprint_finalize(&(*wctx)->section_pbuf[i], NULL);
  404.     if ((*wctx)->writer->priv_class)
  405.         av_opt_free((*wctx)->priv);
  406.     av_freep(&((*wctx)->priv));
  407.     av_opt_free(*wctx);
  408.     av_freep(wctx);
  409. }
  410.  
  411. static void bprint_bytes(AVBPrint *bp, const uint8_t *ubuf, size_t ubuf_size)
  412. {
  413.     int i;
  414.     av_bprintf(bp, "0X");
  415.     for (i = 0; i < ubuf_size; i++)
  416.         av_bprintf(bp, "%02X", ubuf[i]);
  417. }
  418.  
  419.  
  420. static int writer_open(WriterContext **wctx, const Writer *writer, const char *args,
  421.                        const struct section *sections, int nb_sections)
  422. {
  423.     int i, ret = 0;
  424.  
  425.     if (!(*wctx = av_mallocz(sizeof(WriterContext)))) {
  426.         ret = AVERROR(ENOMEM);
  427.         goto fail;
  428.     }
  429.  
  430.     if (!((*wctx)->priv = av_mallocz(writer->priv_size))) {
  431.         ret = AVERROR(ENOMEM);
  432.         goto fail;
  433.     }
  434.  
  435.     (*wctx)->class = &writer_class;
  436.     (*wctx)->writer = writer;
  437.     (*wctx)->level = -1;
  438.     (*wctx)->sections = sections;
  439.     (*wctx)->nb_sections = nb_sections;
  440.  
  441.     av_opt_set_defaults(*wctx);
  442.  
  443.     if (writer->priv_class) {
  444.         void *priv_ctx = (*wctx)->priv;
  445.         *((const AVClass **)priv_ctx) = writer->priv_class;
  446.         av_opt_set_defaults(priv_ctx);
  447.     }
  448.  
  449.     /* convert options to dictionary */
  450.     if (args) {
  451.         AVDictionary *opts = NULL;
  452.         AVDictionaryEntry *opt = NULL;
  453.  
  454.         if ((ret = av_dict_parse_string(&opts, args, "=", ":", 0)) < 0) {
  455.             av_log(*wctx, AV_LOG_ERROR, "Failed to parse option string '%s' provided to writer context\n", args);
  456.             av_dict_free(&opts);
  457.             goto fail;
  458.         }
  459.  
  460.         while ((opt = av_dict_get(opts, "", opt, AV_DICT_IGNORE_SUFFIX))) {
  461.             if ((ret = av_opt_set(*wctx, opt->key, opt->value, AV_OPT_SEARCH_CHILDREN)) < 0) {
  462.                 av_log(*wctx, AV_LOG_ERROR, "Failed to set option '%s' with value '%s' provided to writer context\n",
  463.                        opt->key, opt->value);
  464.                 av_dict_free(&opts);
  465.                 goto fail;
  466.             }
  467.         }
  468.  
  469.         av_dict_free(&opts);
  470.     }
  471.  
  472.     /* validate replace string */
  473.     {
  474.         const uint8_t *p = (*wctx)->string_validation_replacement;
  475.         const uint8_t *endp = p + strlen(p);
  476.         while (*p) {
  477.             const uint8_t *p0 = p;
  478.             int32_t code;
  479.             ret = av_utf8_decode(&code, &p, endp, (*wctx)->string_validation_utf8_flags);
  480.             if (ret < 0) {
  481.                 AVBPrint bp;
  482.                 av_bprint_init(&bp, 0, AV_BPRINT_SIZE_AUTOMATIC);
  483.                 bprint_bytes(&bp, p0, p-p0),
  484.                     av_log(wctx, AV_LOG_ERROR,
  485.                            "Invalid UTF8 sequence %s found in string validation replace '%s'\n",
  486.                            bp.str, (*wctx)->string_validation_replacement);
  487.                 return ret;
  488.             }
  489.         }
  490.     }
  491.  
  492.     for (i = 0; i < SECTION_MAX_NB_LEVELS; i++)
  493.         av_bprint_init(&(*wctx)->section_pbuf[i], 1, AV_BPRINT_SIZE_UNLIMITED);
  494.  
  495.     if ((*wctx)->writer->init)
  496.         ret = (*wctx)->writer->init(*wctx);
  497.     if (ret < 0)
  498.         goto fail;
  499.  
  500.     return 0;
  501.  
  502. fail:
  503.     writer_close(wctx);
  504.     return ret;
  505. }
  506.  
  507. static inline void writer_print_section_header(WriterContext *wctx,
  508.                                                int section_id)
  509. {
  510.     int parent_section_id;
  511.     wctx->level++;
  512.     av_assert0(wctx->level < SECTION_MAX_NB_LEVELS);
  513.     parent_section_id = wctx->level ?
  514.         (wctx->section[wctx->level-1])->id : SECTION_ID_NONE;
  515.  
  516.     wctx->nb_item[wctx->level] = 0;
  517.     wctx->section[wctx->level] = &wctx->sections[section_id];
  518.  
  519.     if (section_id == SECTION_ID_PACKETS_AND_FRAMES) {
  520.         wctx->nb_section_packet = wctx->nb_section_frame =
  521.         wctx->nb_section_packet_frame = 0;
  522.     } else if (parent_section_id == SECTION_ID_PACKETS_AND_FRAMES) {
  523.         wctx->nb_section_packet_frame = section_id == SECTION_ID_PACKET ?
  524.             wctx->nb_section_packet : wctx->nb_section_frame;
  525.     }
  526.  
  527.     if (wctx->writer->print_section_header)
  528.         wctx->writer->print_section_header(wctx);
  529. }
  530.  
  531. static inline void writer_print_section_footer(WriterContext *wctx)
  532. {
  533.     int section_id = wctx->section[wctx->level]->id;
  534.     int parent_section_id = wctx->level ?
  535.         wctx->section[wctx->level-1]->id : SECTION_ID_NONE;
  536.  
  537.     if (parent_section_id != SECTION_ID_NONE)
  538.         wctx->nb_item[wctx->level-1]++;
  539.     if (parent_section_id == SECTION_ID_PACKETS_AND_FRAMES) {
  540.         if (section_id == SECTION_ID_PACKET) wctx->nb_section_packet++;
  541.         else                                     wctx->nb_section_frame++;
  542.     }
  543.     if (wctx->writer->print_section_footer)
  544.         wctx->writer->print_section_footer(wctx);
  545.     wctx->level--;
  546. }
  547.  
  548. static inline void writer_print_integer(WriterContext *wctx,
  549.                                         const char *key, long long int val)
  550. {
  551.     const struct section *section = wctx->section[wctx->level];
  552.  
  553.     if (section->show_all_entries || av_dict_get(section->entries_to_show, key, NULL, 0)) {
  554.         wctx->writer->print_integer(wctx, key, val);
  555.         wctx->nb_item[wctx->level]++;
  556.     }
  557. }
  558.  
  559. static inline int validate_string(WriterContext *wctx, char **dstp, const char *src)
  560. {
  561.     const uint8_t *p, *endp;
  562.     AVBPrint dstbuf;
  563.     int invalid_chars_nb = 0, ret = 0;
  564.  
  565.     av_bprint_init(&dstbuf, 0, AV_BPRINT_SIZE_UNLIMITED);
  566.  
  567.     endp = src + strlen(src);
  568.     for (p = (uint8_t *)src; *p;) {
  569.         uint32_t code;
  570.         int invalid = 0;
  571.         const uint8_t *p0 = p;
  572.  
  573.         if (av_utf8_decode(&code, &p, endp, wctx->string_validation_utf8_flags) < 0) {
  574.             AVBPrint bp;
  575.             av_bprint_init(&bp, 0, AV_BPRINT_SIZE_AUTOMATIC);
  576.             bprint_bytes(&bp, p0, p-p0);
  577.             av_log(wctx, AV_LOG_DEBUG,
  578.                    "Invalid UTF-8 sequence %s found in string '%s'\n", bp.str, src);
  579.             invalid = 1;
  580.         }
  581.  
  582.         if (invalid) {
  583.             invalid_chars_nb++;
  584.  
  585.             switch (wctx->string_validation) {
  586.             case WRITER_STRING_VALIDATION_FAIL:
  587.                 av_log(wctx, AV_LOG_ERROR,
  588.                        "Invalid UTF-8 sequence found in string '%s'\n", src);
  589.                 ret = AVERROR_INVALIDDATA;
  590.                 goto end;
  591.                 break;
  592.  
  593.             case WRITER_STRING_VALIDATION_REPLACE:
  594.                 av_bprintf(&dstbuf, "%s", wctx->string_validation_replacement);
  595.                 break;
  596.             }
  597.         }
  598.  
  599.         if (!invalid || wctx->string_validation == WRITER_STRING_VALIDATION_IGNORE)
  600.             av_bprint_append_data(&dstbuf, p0, p-p0);
  601.     }
  602.  
  603.     if (invalid_chars_nb && wctx->string_validation == WRITER_STRING_VALIDATION_REPLACE) {
  604.         av_log(wctx, AV_LOG_WARNING,
  605.                "%d invalid UTF-8 sequence(s) found in string '%s', replaced with '%s'\n",
  606.                invalid_chars_nb, src, wctx->string_validation_replacement);
  607.     }
  608.  
  609. end:
  610.     av_bprint_finalize(&dstbuf, dstp);
  611.     return ret;
  612. }
  613.  
  614. #define PRINT_STRING_OPT      1
  615. #define PRINT_STRING_VALIDATE 2
  616.  
  617. static inline int writer_print_string(WriterContext *wctx,
  618.                                       const char *key, const char *val, int flags)
  619. {
  620.     const struct section *section = wctx->section[wctx->level];
  621.     int ret = 0;
  622.  
  623.     if ((flags & PRINT_STRING_OPT)
  624.         && !(wctx->writer->flags & WRITER_FLAG_DISPLAY_OPTIONAL_FIELDS))
  625.         return 0;
  626.  
  627.     if (section->show_all_entries || av_dict_get(section->entries_to_show, key, NULL, 0)) {
  628.         if (flags & PRINT_STRING_VALIDATE) {
  629.             char *key1 = NULL, *val1 = NULL;
  630.             ret = validate_string(wctx, &key1, key);
  631.             if (ret < 0) goto end;
  632.             ret = validate_string(wctx, &val1, val);
  633.             if (ret < 0) goto end;
  634.             wctx->writer->print_string(wctx, key1, val1);
  635.         end:
  636.             if (ret < 0) {
  637.                 av_log(wctx, AV_LOG_ERROR,
  638.                        "Invalid key=value string combination %s=%s in section %s\n",
  639.                        key, val, section->unique_name);
  640.             }
  641.             av_free(key1);
  642.             av_free(val1);
  643.         } else {
  644.             wctx->writer->print_string(wctx, key, val);
  645.         }
  646.  
  647.         wctx->nb_item[wctx->level]++;
  648.     }
  649.  
  650.     return ret;
  651. }
  652.  
  653. static inline void writer_print_rational(WriterContext *wctx,
  654.                                          const char *key, AVRational q, char sep)
  655. {
  656.     AVBPrint buf;
  657.     av_bprint_init(&buf, 0, AV_BPRINT_SIZE_AUTOMATIC);
  658.     av_bprintf(&buf, "%d%c%d", q.num, sep, q.den);
  659.     writer_print_string(wctx, key, buf.str, 0);
  660. }
  661.  
  662. static void writer_print_time(WriterContext *wctx, const char *key,
  663.                               int64_t ts, const AVRational *time_base, int is_duration)
  664. {
  665.     char buf[128];
  666.  
  667.     if ((!is_duration && ts == AV_NOPTS_VALUE) || (is_duration && ts == 0)) {
  668.         writer_print_string(wctx, key, "N/A", PRINT_STRING_OPT);
  669.     } else {
  670.         double d = ts * av_q2d(*time_base);
  671.         struct unit_value uv;
  672.         uv.val.d = d;
  673.         uv.unit = unit_second_str;
  674.         value_string(buf, sizeof(buf), uv);
  675.         writer_print_string(wctx, key, buf, 0);
  676.     }
  677. }
  678.  
  679. static void writer_print_ts(WriterContext *wctx, const char *key, int64_t ts, int is_duration)
  680. {
  681.     if ((!is_duration && ts == AV_NOPTS_VALUE) || (is_duration && ts == 0)) {
  682.         writer_print_string(wctx, key, "N/A", PRINT_STRING_OPT);
  683.     } else {
  684.         writer_print_integer(wctx, key, ts);
  685.     }
  686. }
  687.  
  688. static void writer_print_data(WriterContext *wctx, const char *name,
  689.                               uint8_t *data, int size)
  690. {
  691.     AVBPrint bp;
  692.     int offset = 0, l, i;
  693.  
  694.     av_bprint_init(&bp, 0, AV_BPRINT_SIZE_UNLIMITED);
  695.     av_bprintf(&bp, "\n");
  696.     while (size) {
  697.         av_bprintf(&bp, "%08x: ", offset);
  698.         l = FFMIN(size, 16);
  699.         for (i = 0; i < l; i++) {
  700.             av_bprintf(&bp, "%02x", data[i]);
  701.             if (i & 1)
  702.                 av_bprintf(&bp, " ");
  703.         }
  704.         av_bprint_chars(&bp, ' ', 41 - 2 * i - i / 2);
  705.         for (i = 0; i < l; i++)
  706.             av_bprint_chars(&bp, data[i] - 32U < 95 ? data[i] : '.', 1);
  707.         av_bprintf(&bp, "\n");
  708.         offset += l;
  709.         data   += l;
  710.         size   -= l;
  711.     }
  712.     writer_print_string(wctx, name, bp.str, 0);
  713.     av_bprint_finalize(&bp, NULL);
  714. }
  715.  
  716. static void writer_print_data_hash(WriterContext *wctx, const char *name,
  717.                                    uint8_t *data, int size)
  718. {
  719.     char *p, buf[AV_HASH_MAX_SIZE * 2 + 64] = { 0 };
  720.  
  721.     if (!hash)
  722.         return;
  723.     av_hash_init(hash);
  724.     av_hash_update(hash, data, size);
  725.     snprintf(buf, sizeof(buf), "%s:", av_hash_get_name(hash));
  726.     p = buf + strlen(buf);
  727.     av_hash_final_hex(hash, p, buf + sizeof(buf) - p);
  728.     writer_print_string(wctx, name, buf, 0);
  729. }
  730.  
  731. static void writer_print_integers(WriterContext *wctx, const char *name,
  732.                                   uint8_t *data, int size, const char *format,
  733.                                   int columns, int bytes, int offset_add)
  734. {
  735.     AVBPrint bp;
  736.     int offset = 0, l, i;
  737.  
  738.     av_bprint_init(&bp, 0, AV_BPRINT_SIZE_UNLIMITED);
  739.     av_bprintf(&bp, "\n");
  740.     while (size) {
  741.         av_bprintf(&bp, "%08x: ", offset);
  742.         l = FFMIN(size, columns);
  743.         for (i = 0; i < l; i++) {
  744.             if      (bytes == 1) av_bprintf(&bp, format, *data);
  745.             else if (bytes == 2) av_bprintf(&bp, format, AV_RN16(data));
  746.             else if (bytes == 4) av_bprintf(&bp, format, AV_RN32(data));
  747.             data += bytes;
  748.             size --;
  749.         }
  750.         av_bprintf(&bp, "\n");
  751.         offset += offset_add;
  752.     }
  753.     writer_print_string(wctx, name, bp.str, 0);
  754.     av_bprint_finalize(&bp, NULL);
  755. }
  756.  
  757. #define MAX_REGISTERED_WRITERS_NB 64
  758.  
  759. static const Writer *registered_writers[MAX_REGISTERED_WRITERS_NB + 1];
  760.  
  761. static int writer_register(const Writer *writer)
  762. {
  763.     static int next_registered_writer_idx = 0;
  764.  
  765.     if (next_registered_writer_idx == MAX_REGISTERED_WRITERS_NB)
  766.         return AVERROR(ENOMEM);
  767.  
  768.     registered_writers[next_registered_writer_idx++] = writer;
  769.     return 0;
  770. }
  771.  
  772. static const Writer *writer_get_by_name(const char *name)
  773. {
  774.     int i;
  775.  
  776.     for (i = 0; registered_writers[i]; i++)
  777.         if (!strcmp(registered_writers[i]->name, name))
  778.             return registered_writers[i];
  779.  
  780.     return NULL;
  781. }
  782.  
  783.  
  784. /* WRITERS */
  785.  
  786. #define DEFINE_WRITER_CLASS(name)                   \
  787. static const char *name##_get_name(void *ctx)       \
  788. {                                                   \
  789.     return #name ;                                  \
  790. }                                                   \
  791. static const AVClass name##_class = {               \
  792.     .class_name = #name,                            \
  793.     .item_name  = name##_get_name,                  \
  794.     .option     = name##_options                    \
  795. }
  796.  
  797. /* Default output */
  798.  
  799. typedef struct DefaultContext {
  800.     const AVClass *class;
  801.     int nokey;
  802.     int noprint_wrappers;
  803.     int nested_section[SECTION_MAX_NB_LEVELS];
  804. } DefaultContext;
  805.  
  806. #undef OFFSET
  807. #define OFFSET(x) offsetof(DefaultContext, x)
  808.  
  809. static const AVOption default_options[] = {
  810.     { "noprint_wrappers", "do not print headers and footers", OFFSET(noprint_wrappers), AV_OPT_TYPE_INT, {.i64=0}, 0, 1 },
  811.     { "nw",               "do not print headers and footers", OFFSET(noprint_wrappers), AV_OPT_TYPE_INT, {.i64=0}, 0, 1 },
  812.     { "nokey",          "force no key printing",     OFFSET(nokey),          AV_OPT_TYPE_INT, {.i64=0}, 0, 1 },
  813.     { "nk",             "force no key printing",     OFFSET(nokey),          AV_OPT_TYPE_INT, {.i64=0}, 0, 1 },
  814.     {NULL},
  815. };
  816.  
  817. DEFINE_WRITER_CLASS(default);
  818.  
  819. /* lame uppercasing routine, assumes the string is lower case ASCII */
  820. static inline char *upcase_string(char *dst, size_t dst_size, const char *src)
  821. {
  822.     int i;
  823.     for (i = 0; src[i] && i < dst_size-1; i++)
  824.         dst[i] = av_toupper(src[i]);
  825.     dst[i] = 0;
  826.     return dst;
  827. }
  828.  
  829. static void default_print_section_header(WriterContext *wctx)
  830. {
  831.     DefaultContext *def = wctx->priv;
  832.     char buf[32];
  833.     const struct section *section = wctx->section[wctx->level];
  834.     const struct section *parent_section = wctx->level ?
  835.         wctx->section[wctx->level-1] : NULL;
  836.  
  837.     av_bprint_clear(&wctx->section_pbuf[wctx->level]);
  838.     if (parent_section &&
  839.         !(parent_section->flags & (SECTION_FLAG_IS_WRAPPER|SECTION_FLAG_IS_ARRAY))) {
  840.         def->nested_section[wctx->level] = 1;
  841.         av_bprintf(&wctx->section_pbuf[wctx->level], "%s%s:",
  842.                    wctx->section_pbuf[wctx->level-1].str,
  843.                    upcase_string(buf, sizeof(buf),
  844.                                  av_x_if_null(section->element_name, section->name)));
  845.     }
  846.  
  847.     if (def->noprint_wrappers || def->nested_section[wctx->level])
  848.         return;
  849.  
  850.     if (!(section->flags & (SECTION_FLAG_IS_WRAPPER|SECTION_FLAG_IS_ARRAY)))
  851.         printf("[%s]\n", upcase_string(buf, sizeof(buf), section->name));
  852. }
  853.  
  854. static void default_print_section_footer(WriterContext *wctx)
  855. {
  856.     DefaultContext *def = wctx->priv;
  857.     const struct section *section = wctx->section[wctx->level];
  858.     char buf[32];
  859.  
  860.     if (def->noprint_wrappers || def->nested_section[wctx->level])
  861.         return;
  862.  
  863.     if (!(section->flags & (SECTION_FLAG_IS_WRAPPER|SECTION_FLAG_IS_ARRAY)))
  864.         printf("[/%s]\n", upcase_string(buf, sizeof(buf), section->name));
  865. }
  866.  
  867. static void default_print_str(WriterContext *wctx, const char *key, const char *value)
  868. {
  869.     DefaultContext *def = wctx->priv;
  870.  
  871.     if (!def->nokey)
  872.         printf("%s%s=", wctx->section_pbuf[wctx->level].str, key);
  873.     printf("%s\n", value);
  874. }
  875.  
  876. static void default_print_int(WriterContext *wctx, const char *key, long long int value)
  877. {
  878.     DefaultContext *def = wctx->priv;
  879.  
  880.     if (!def->nokey)
  881.         printf("%s%s=", wctx->section_pbuf[wctx->level].str, key);
  882.     printf("%lld\n", value);
  883. }
  884.  
  885. static const Writer default_writer = {
  886.     .name                  = "default",
  887.     .priv_size             = sizeof(DefaultContext),
  888.     .print_section_header  = default_print_section_header,
  889.     .print_section_footer  = default_print_section_footer,
  890.     .print_integer         = default_print_int,
  891.     .print_string          = default_print_str,
  892.     .flags = WRITER_FLAG_DISPLAY_OPTIONAL_FIELDS,
  893.     .priv_class            = &default_class,
  894. };
  895.  
  896. /* Compact output */
  897.  
  898. /**
  899.  * Apply C-language-like string escaping.
  900.  */
  901. static const char *c_escape_str(AVBPrint *dst, const char *src, const char sep, void *log_ctx)
  902. {
  903.     const char *p;
  904.  
  905.     for (p = src; *p; p++) {
  906.         switch (*p) {
  907.         case '\b': av_bprintf(dst, "%s", "\\b");  break;
  908.         case '\f': av_bprintf(dst, "%s", "\\f");  break;
  909.         case '\n': av_bprintf(dst, "%s", "\\n");  break;
  910.         case '\r': av_bprintf(dst, "%s", "\\r");  break;
  911.         case '\\': av_bprintf(dst, "%s", "\\\\"); break;
  912.         default:
  913.             if (*p == sep)
  914.                 av_bprint_chars(dst, '\\', 1);
  915.             av_bprint_chars(dst, *p, 1);
  916.         }
  917.     }
  918.     return dst->str;
  919. }
  920.  
  921. /**
  922.  * Quote fields containing special characters, check RFC4180.
  923.  */
  924. static const char *csv_escape_str(AVBPrint *dst, const char *src, const char sep, void *log_ctx)
  925. {
  926.     char meta_chars[] = { sep, '"', '\n', '\r', '\0' };
  927.     int needs_quoting = !!src[strcspn(src, meta_chars)];
  928.  
  929.     if (needs_quoting)
  930.         av_bprint_chars(dst, '"', 1);
  931.  
  932.     for (; *src; src++) {
  933.         if (*src == '"')
  934.             av_bprint_chars(dst, '"', 1);
  935.         av_bprint_chars(dst, *src, 1);
  936.     }
  937.     if (needs_quoting)
  938.         av_bprint_chars(dst, '"', 1);
  939.     return dst->str;
  940. }
  941.  
  942. static const char *none_escape_str(AVBPrint *dst, const char *src, const char sep, void *log_ctx)
  943. {
  944.     return src;
  945. }
  946.  
  947. typedef struct CompactContext {
  948.     const AVClass *class;
  949.     char *item_sep_str;
  950.     char item_sep;
  951.     int nokey;
  952.     int print_section;
  953.     char *escape_mode_str;
  954.     const char * (*escape_str)(AVBPrint *dst, const char *src, const char sep, void *log_ctx);
  955.     int nested_section[SECTION_MAX_NB_LEVELS];
  956.     int has_nested_elems[SECTION_MAX_NB_LEVELS];
  957.     int terminate_line[SECTION_MAX_NB_LEVELS];
  958. } CompactContext;
  959.  
  960. #undef OFFSET
  961. #define OFFSET(x) offsetof(CompactContext, x)
  962.  
  963. static const AVOption compact_options[]= {
  964.     {"item_sep", "set item separator",    OFFSET(item_sep_str),    AV_OPT_TYPE_STRING, {.str="|"},  CHAR_MIN, CHAR_MAX },
  965.     {"s",        "set item separator",    OFFSET(item_sep_str),    AV_OPT_TYPE_STRING, {.str="|"},  CHAR_MIN, CHAR_MAX },
  966.     {"nokey",    "force no key printing", OFFSET(nokey),           AV_OPT_TYPE_INT,    {.i64=0},    0,        1        },
  967.     {"nk",       "force no key printing", OFFSET(nokey),           AV_OPT_TYPE_INT,    {.i64=0},    0,        1        },
  968.     {"escape",   "set escape mode",       OFFSET(escape_mode_str), AV_OPT_TYPE_STRING, {.str="c"},  CHAR_MIN, CHAR_MAX },
  969.     {"e",        "set escape mode",       OFFSET(escape_mode_str), AV_OPT_TYPE_STRING, {.str="c"},  CHAR_MIN, CHAR_MAX },
  970.     {"print_section", "print section name", OFFSET(print_section), AV_OPT_TYPE_INT,    {.i64=1},    0,        1        },
  971.     {"p",             "print section name", OFFSET(print_section), AV_OPT_TYPE_INT,    {.i64=1},    0,        1        },
  972.     {NULL},
  973. };
  974.  
  975. DEFINE_WRITER_CLASS(compact);
  976.  
  977. static av_cold int compact_init(WriterContext *wctx)
  978. {
  979.     CompactContext *compact = wctx->priv;
  980.  
  981.     if (strlen(compact->item_sep_str) != 1) {
  982.         av_log(wctx, AV_LOG_ERROR, "Item separator '%s' specified, but must contain a single character\n",
  983.                compact->item_sep_str);
  984.         return AVERROR(EINVAL);
  985.     }
  986.     compact->item_sep = compact->item_sep_str[0];
  987.  
  988.     if      (!strcmp(compact->escape_mode_str, "none")) compact->escape_str = none_escape_str;
  989.     else if (!strcmp(compact->escape_mode_str, "c"   )) compact->escape_str = c_escape_str;
  990.     else if (!strcmp(compact->escape_mode_str, "csv" )) compact->escape_str = csv_escape_str;
  991.     else {
  992.         av_log(wctx, AV_LOG_ERROR, "Unknown escape mode '%s'\n", compact->escape_mode_str);
  993.         return AVERROR(EINVAL);
  994.     }
  995.  
  996.     return 0;
  997. }
  998.  
  999. static void compact_print_section_header(WriterContext *wctx)
  1000. {
  1001.     CompactContext *compact = wctx->priv;
  1002.     const struct section *section = wctx->section[wctx->level];
  1003.     const struct section *parent_section = wctx->level ?
  1004.         wctx->section[wctx->level-1] : NULL;
  1005.     compact->terminate_line[wctx->level] = 1;
  1006.     compact->has_nested_elems[wctx->level] = 0;
  1007.  
  1008.     av_bprint_clear(&wctx->section_pbuf[wctx->level]);
  1009.     if (!(section->flags & SECTION_FLAG_IS_ARRAY) && parent_section &&
  1010.         !(parent_section->flags & (SECTION_FLAG_IS_WRAPPER|SECTION_FLAG_IS_ARRAY))) {
  1011.         compact->nested_section[wctx->level] = 1;
  1012.         compact->has_nested_elems[wctx->level-1] = 1;
  1013.         av_bprintf(&wctx->section_pbuf[wctx->level], "%s%s:",
  1014.                    wctx->section_pbuf[wctx->level-1].str,
  1015.                    (char *)av_x_if_null(section->element_name, section->name));
  1016.         wctx->nb_item[wctx->level] = wctx->nb_item[wctx->level-1];
  1017.     } else {
  1018.         if (parent_section && compact->has_nested_elems[wctx->level-1] &&
  1019.             (section->flags & SECTION_FLAG_IS_ARRAY)) {
  1020.             compact->terminate_line[wctx->level-1] = 0;
  1021.             printf("\n");
  1022.         }
  1023.         if (compact->print_section &&
  1024.             !(section->flags & (SECTION_FLAG_IS_WRAPPER|SECTION_FLAG_IS_ARRAY)))
  1025.             printf("%s%c", section->name, compact->item_sep);
  1026.     }
  1027. }
  1028.  
  1029. static void compact_print_section_footer(WriterContext *wctx)
  1030. {
  1031.     CompactContext *compact = wctx->priv;
  1032.  
  1033.     if (!compact->nested_section[wctx->level] &&
  1034.         compact->terminate_line[wctx->level] &&
  1035.         !(wctx->section[wctx->level]->flags & (SECTION_FLAG_IS_WRAPPER|SECTION_FLAG_IS_ARRAY)))
  1036.         printf("\n");
  1037. }
  1038.  
  1039. static void compact_print_str(WriterContext *wctx, const char *key, const char *value)
  1040. {
  1041.     CompactContext *compact = wctx->priv;
  1042.     AVBPrint buf;
  1043.  
  1044.     if (wctx->nb_item[wctx->level]) printf("%c", compact->item_sep);
  1045.     if (!compact->nokey)
  1046.         printf("%s%s=", wctx->section_pbuf[wctx->level].str, key);
  1047.     av_bprint_init(&buf, 1, AV_BPRINT_SIZE_UNLIMITED);
  1048.     printf("%s", compact->escape_str(&buf, value, compact->item_sep, wctx));
  1049.     av_bprint_finalize(&buf, NULL);
  1050. }
  1051.  
  1052. static void compact_print_int(WriterContext *wctx, const char *key, long long int value)
  1053. {
  1054.     CompactContext *compact = wctx->priv;
  1055.  
  1056.     if (wctx->nb_item[wctx->level]) printf("%c", compact->item_sep);
  1057.     if (!compact->nokey)
  1058.         printf("%s%s=", wctx->section_pbuf[wctx->level].str, key);
  1059.     printf("%lld", value);
  1060. }
  1061.  
  1062. static const Writer compact_writer = {
  1063.     .name                 = "compact",
  1064.     .priv_size            = sizeof(CompactContext),
  1065.     .init                 = compact_init,
  1066.     .print_section_header = compact_print_section_header,
  1067.     .print_section_footer = compact_print_section_footer,
  1068.     .print_integer        = compact_print_int,
  1069.     .print_string         = compact_print_str,
  1070.     .flags = WRITER_FLAG_DISPLAY_OPTIONAL_FIELDS,
  1071.     .priv_class           = &compact_class,
  1072. };
  1073.  
  1074. /* CSV output */
  1075.  
  1076. #undef OFFSET
  1077. #define OFFSET(x) offsetof(CompactContext, x)
  1078.  
  1079. static const AVOption csv_options[] = {
  1080.     {"item_sep", "set item separator",    OFFSET(item_sep_str),    AV_OPT_TYPE_STRING, {.str=","},  CHAR_MIN, CHAR_MAX },
  1081.     {"s",        "set item separator",    OFFSET(item_sep_str),    AV_OPT_TYPE_STRING, {.str=","},  CHAR_MIN, CHAR_MAX },
  1082.     {"nokey",    "force no key printing", OFFSET(nokey),           AV_OPT_TYPE_INT,    {.i64=1},    0,        1        },
  1083.     {"nk",       "force no key printing", OFFSET(nokey),           AV_OPT_TYPE_INT,    {.i64=1},    0,        1        },
  1084.     {"escape",   "set escape mode",       OFFSET(escape_mode_str), AV_OPT_TYPE_STRING, {.str="csv"}, CHAR_MIN, CHAR_MAX },
  1085.     {"e",        "set escape mode",       OFFSET(escape_mode_str), AV_OPT_TYPE_STRING, {.str="csv"}, CHAR_MIN, CHAR_MAX },
  1086.     {"print_section", "print section name", OFFSET(print_section), AV_OPT_TYPE_INT,    {.i64=1},    0,        1        },
  1087.     {"p",             "print section name", OFFSET(print_section), AV_OPT_TYPE_INT,    {.i64=1},    0,        1        },
  1088.     {NULL},
  1089. };
  1090.  
  1091. DEFINE_WRITER_CLASS(csv);
  1092.  
  1093. static const Writer csv_writer = {
  1094.     .name                 = "csv",
  1095.     .priv_size            = sizeof(CompactContext),
  1096.     .init                 = compact_init,
  1097.     .print_section_header = compact_print_section_header,
  1098.     .print_section_footer = compact_print_section_footer,
  1099.     .print_integer        = compact_print_int,
  1100.     .print_string         = compact_print_str,
  1101.     .flags = WRITER_FLAG_DISPLAY_OPTIONAL_FIELDS,
  1102.     .priv_class           = &csv_class,
  1103. };
  1104.  
  1105. /* Flat output */
  1106.  
  1107. typedef struct FlatContext {
  1108.     const AVClass *class;
  1109.     const char *sep_str;
  1110.     char sep;
  1111.     int hierarchical;
  1112. } FlatContext;
  1113.  
  1114. #undef OFFSET
  1115. #define OFFSET(x) offsetof(FlatContext, x)
  1116.  
  1117. static const AVOption flat_options[]= {
  1118.     {"sep_char", "set separator",    OFFSET(sep_str),    AV_OPT_TYPE_STRING, {.str="."},  CHAR_MIN, CHAR_MAX },
  1119.     {"s",        "set separator",    OFFSET(sep_str),    AV_OPT_TYPE_STRING, {.str="."},  CHAR_MIN, CHAR_MAX },
  1120.     {"hierarchical", "specify if the section specification should be hierarchical", OFFSET(hierarchical), AV_OPT_TYPE_INT, {.i64=1}, 0, 1 },
  1121.     {"h",           "specify if the section specification should be hierarchical", OFFSET(hierarchical), AV_OPT_TYPE_INT, {.i64=1}, 0, 1 },
  1122.     {NULL},
  1123. };
  1124.  
  1125. DEFINE_WRITER_CLASS(flat);
  1126.  
  1127. static av_cold int flat_init(WriterContext *wctx)
  1128. {
  1129.     FlatContext *flat = wctx->priv;
  1130.  
  1131.     if (strlen(flat->sep_str) != 1) {
  1132.         av_log(wctx, AV_LOG_ERROR, "Item separator '%s' specified, but must contain a single character\n",
  1133.                flat->sep_str);
  1134.         return AVERROR(EINVAL);
  1135.     }
  1136.     flat->sep = flat->sep_str[0];
  1137.  
  1138.     return 0;
  1139. }
  1140.  
  1141. static const char *flat_escape_key_str(AVBPrint *dst, const char *src, const char sep)
  1142. {
  1143.     const char *p;
  1144.  
  1145.     for (p = src; *p; p++) {
  1146.         if (!((*p >= '0' && *p <= '9') ||
  1147.               (*p >= 'a' && *p <= 'z') ||
  1148.               (*p >= 'A' && *p <= 'Z')))
  1149.             av_bprint_chars(dst, '_', 1);
  1150.         else
  1151.             av_bprint_chars(dst, *p, 1);
  1152.     }
  1153.     return dst->str;
  1154. }
  1155.  
  1156. static const char *flat_escape_value_str(AVBPrint *dst, const char *src)
  1157. {
  1158.     const char *p;
  1159.  
  1160.     for (p = src; *p; p++) {
  1161.         switch (*p) {
  1162.         case '\n': av_bprintf(dst, "%s", "\\n");  break;
  1163.         case '\r': av_bprintf(dst, "%s", "\\r");  break;
  1164.         case '\\': av_bprintf(dst, "%s", "\\\\"); break;
  1165.         case '"':  av_bprintf(dst, "%s", "\\\""); break;
  1166.         case '`':  av_bprintf(dst, "%s", "\\`");  break;
  1167.         case '$':  av_bprintf(dst, "%s", "\\$");  break;
  1168.         default:   av_bprint_chars(dst, *p, 1);   break;
  1169.         }
  1170.     }
  1171.     return dst->str;
  1172. }
  1173.  
  1174. static void flat_print_section_header(WriterContext *wctx)
  1175. {
  1176.     FlatContext *flat = wctx->priv;
  1177.     AVBPrint *buf = &wctx->section_pbuf[wctx->level];
  1178.     const struct section *section = wctx->section[wctx->level];
  1179.     const struct section *parent_section = wctx->level ?
  1180.         wctx->section[wctx->level-1] : NULL;
  1181.  
  1182.     /* build section header */
  1183.     av_bprint_clear(buf);
  1184.     if (!parent_section)
  1185.         return;
  1186.     av_bprintf(buf, "%s", wctx->section_pbuf[wctx->level-1].str);
  1187.  
  1188.     if (flat->hierarchical ||
  1189.         !(section->flags & (SECTION_FLAG_IS_ARRAY|SECTION_FLAG_IS_WRAPPER))) {
  1190.         av_bprintf(buf, "%s%s", wctx->section[wctx->level]->name, flat->sep_str);
  1191.  
  1192.         if (parent_section->flags & SECTION_FLAG_IS_ARRAY) {
  1193.             int n = parent_section->id == SECTION_ID_PACKETS_AND_FRAMES ?
  1194.                 wctx->nb_section_packet_frame : wctx->nb_item[wctx->level-1];
  1195.             av_bprintf(buf, "%d%s", n, flat->sep_str);
  1196.         }
  1197.     }
  1198. }
  1199.  
  1200. static void flat_print_int(WriterContext *wctx, const char *key, long long int value)
  1201. {
  1202.     printf("%s%s=%lld\n", wctx->section_pbuf[wctx->level].str, key, value);
  1203. }
  1204.  
  1205. static void flat_print_str(WriterContext *wctx, const char *key, const char *value)
  1206. {
  1207.     FlatContext *flat = wctx->priv;
  1208.     AVBPrint buf;
  1209.  
  1210.     printf("%s", wctx->section_pbuf[wctx->level].str);
  1211.     av_bprint_init(&buf, 1, AV_BPRINT_SIZE_UNLIMITED);
  1212.     printf("%s=", flat_escape_key_str(&buf, key, flat->sep));
  1213.     av_bprint_clear(&buf);
  1214.     printf("\"%s\"\n", flat_escape_value_str(&buf, value));
  1215.     av_bprint_finalize(&buf, NULL);
  1216. }
  1217.  
  1218. static const Writer flat_writer = {
  1219.     .name                  = "flat",
  1220.     .priv_size             = sizeof(FlatContext),
  1221.     .init                  = flat_init,
  1222.     .print_section_header  = flat_print_section_header,
  1223.     .print_integer         = flat_print_int,
  1224.     .print_string          = flat_print_str,
  1225.     .flags = WRITER_FLAG_DISPLAY_OPTIONAL_FIELDS|WRITER_FLAG_PUT_PACKETS_AND_FRAMES_IN_SAME_CHAPTER,
  1226.     .priv_class            = &flat_class,
  1227. };
  1228.  
  1229. /* INI format output */
  1230.  
  1231. typedef struct INIContext {
  1232.     const AVClass *class;
  1233.     int hierarchical;
  1234. } INIContext;
  1235.  
  1236. #undef OFFSET
  1237. #define OFFSET(x) offsetof(INIContext, x)
  1238.  
  1239. static const AVOption ini_options[] = {
  1240.     {"hierarchical", "specify if the section specification should be hierarchical", OFFSET(hierarchical), AV_OPT_TYPE_INT, {.i64=1}, 0, 1 },
  1241.     {"h",           "specify if the section specification should be hierarchical", OFFSET(hierarchical), AV_OPT_TYPE_INT, {.i64=1}, 0, 1 },
  1242.     {NULL},
  1243. };
  1244.  
  1245. DEFINE_WRITER_CLASS(ini);
  1246.  
  1247. static char *ini_escape_str(AVBPrint *dst, const char *src)
  1248. {
  1249.     int i = 0;
  1250.     char c = 0;
  1251.  
  1252.     while (c = src[i++]) {
  1253.         switch (c) {
  1254.         case '\b': av_bprintf(dst, "%s", "\\b"); break;
  1255.         case '\f': av_bprintf(dst, "%s", "\\f"); break;
  1256.         case '\n': av_bprintf(dst, "%s", "\\n"); break;
  1257.         case '\r': av_bprintf(dst, "%s", "\\r"); break;
  1258.         case '\t': av_bprintf(dst, "%s", "\\t"); break;
  1259.         case '\\':
  1260.         case '#' :
  1261.         case '=' :
  1262.         case ':' : av_bprint_chars(dst, '\\', 1);
  1263.         default:
  1264.             if ((unsigned char)c < 32)
  1265.                 av_bprintf(dst, "\\x00%02x", c & 0xff);
  1266.             else
  1267.                 av_bprint_chars(dst, c, 1);
  1268.             break;
  1269.         }
  1270.     }
  1271.     return dst->str;
  1272. }
  1273.  
  1274. static void ini_print_section_header(WriterContext *wctx)
  1275. {
  1276.     INIContext *ini = wctx->priv;
  1277.     AVBPrint *buf = &wctx->section_pbuf[wctx->level];
  1278.     const struct section *section = wctx->section[wctx->level];
  1279.     const struct section *parent_section = wctx->level ?
  1280.         wctx->section[wctx->level-1] : NULL;
  1281.  
  1282.     av_bprint_clear(buf);
  1283.     if (!parent_section) {
  1284.         printf("# ffprobe output\n\n");
  1285.         return;
  1286.     }
  1287.  
  1288.     if (wctx->nb_item[wctx->level-1])
  1289.         printf("\n");
  1290.  
  1291.     av_bprintf(buf, "%s", wctx->section_pbuf[wctx->level-1].str);
  1292.     if (ini->hierarchical ||
  1293.         !(section->flags & (SECTION_FLAG_IS_ARRAY|SECTION_FLAG_IS_WRAPPER))) {
  1294.         av_bprintf(buf, "%s%s", buf->str[0] ? "." : "", wctx->section[wctx->level]->name);
  1295.  
  1296.         if (parent_section->flags & SECTION_FLAG_IS_ARRAY) {
  1297.             int n = parent_section->id == SECTION_ID_PACKETS_AND_FRAMES ?
  1298.                 wctx->nb_section_packet_frame : wctx->nb_item[wctx->level-1];
  1299.             av_bprintf(buf, ".%d", n);
  1300.         }
  1301.     }
  1302.  
  1303.     if (!(section->flags & (SECTION_FLAG_IS_ARRAY|SECTION_FLAG_IS_WRAPPER)))
  1304.         printf("[%s]\n", buf->str);
  1305. }
  1306.  
  1307. static void ini_print_str(WriterContext *wctx, const char *key, const char *value)
  1308. {
  1309.     AVBPrint buf;
  1310.  
  1311.     av_bprint_init(&buf, 1, AV_BPRINT_SIZE_UNLIMITED);
  1312.     printf("%s=", ini_escape_str(&buf, key));
  1313.     av_bprint_clear(&buf);
  1314.     printf("%s\n", ini_escape_str(&buf, value));
  1315.     av_bprint_finalize(&buf, NULL);
  1316. }
  1317.  
  1318. static void ini_print_int(WriterContext *wctx, const char *key, long long int value)
  1319. {
  1320.     printf("%s=%lld\n", key, value);
  1321. }
  1322.  
  1323. static const Writer ini_writer = {
  1324.     .name                  = "ini",
  1325.     .priv_size             = sizeof(INIContext),
  1326.     .print_section_header  = ini_print_section_header,
  1327.     .print_integer         = ini_print_int,
  1328.     .print_string          = ini_print_str,
  1329.     .flags = WRITER_FLAG_DISPLAY_OPTIONAL_FIELDS|WRITER_FLAG_PUT_PACKETS_AND_FRAMES_IN_SAME_CHAPTER,
  1330.     .priv_class            = &ini_class,
  1331. };
  1332.  
  1333. /* JSON output */
  1334.  
  1335. typedef struct JSONContext {
  1336.     const AVClass *class;
  1337.     int indent_level;
  1338.     int compact;
  1339.     const char *item_sep, *item_start_end;
  1340. } JSONContext;
  1341.  
  1342. #undef OFFSET
  1343. #define OFFSET(x) offsetof(JSONContext, x)
  1344.  
  1345. static const AVOption json_options[]= {
  1346.     { "compact", "enable compact output", OFFSET(compact), AV_OPT_TYPE_INT, {.i64=0}, 0, 1 },
  1347.     { "c",       "enable compact output", OFFSET(compact), AV_OPT_TYPE_INT, {.i64=0}, 0, 1 },
  1348.     { NULL }
  1349. };
  1350.  
  1351. DEFINE_WRITER_CLASS(json);
  1352.  
  1353. static av_cold int json_init(WriterContext *wctx)
  1354. {
  1355.     JSONContext *json = wctx->priv;
  1356.  
  1357.     json->item_sep       = json->compact ? ", " : ",\n";
  1358.     json->item_start_end = json->compact ? " "  : "\n";
  1359.  
  1360.     return 0;
  1361. }
  1362.  
  1363. static const char *json_escape_str(AVBPrint *dst, const char *src, void *log_ctx)
  1364. {
  1365.     static const char json_escape[] = {'"', '\\', '\b', '\f', '\n', '\r', '\t', 0};
  1366.     static const char json_subst[]  = {'"', '\\',  'b',  'f',  'n',  'r',  't', 0};
  1367.     const char *p;
  1368.  
  1369.     for (p = src; *p; p++) {
  1370.         char *s = strchr(json_escape, *p);
  1371.         if (s) {
  1372.             av_bprint_chars(dst, '\\', 1);
  1373.             av_bprint_chars(dst, json_subst[s - json_escape], 1);
  1374.         } else if ((unsigned char)*p < 32) {
  1375.             av_bprintf(dst, "\\u00%02x", *p & 0xff);
  1376.         } else {
  1377.             av_bprint_chars(dst, *p, 1);
  1378.         }
  1379.     }
  1380.     return dst->str;
  1381. }
  1382.  
  1383. #define JSON_INDENT() printf("%*c", json->indent_level * 4, ' ')
  1384.  
  1385. static void json_print_section_header(WriterContext *wctx)
  1386. {
  1387.     JSONContext *json = wctx->priv;
  1388.     AVBPrint buf;
  1389.     const struct section *section = wctx->section[wctx->level];
  1390.     const struct section *parent_section = wctx->level ?
  1391.         wctx->section[wctx->level-1] : NULL;
  1392.  
  1393.     if (wctx->level && wctx->nb_item[wctx->level-1])
  1394.         printf(",\n");
  1395.  
  1396.     if (section->flags & SECTION_FLAG_IS_WRAPPER) {
  1397.         printf("{\n");
  1398.         json->indent_level++;
  1399.     } else {
  1400.         av_bprint_init(&buf, 1, AV_BPRINT_SIZE_UNLIMITED);
  1401.         json_escape_str(&buf, section->name, wctx);
  1402.         JSON_INDENT();
  1403.  
  1404.         json->indent_level++;
  1405.         if (section->flags & SECTION_FLAG_IS_ARRAY) {
  1406.             printf("\"%s\": [\n", buf.str);
  1407.         } else if (parent_section && !(parent_section->flags & SECTION_FLAG_IS_ARRAY)) {
  1408.             printf("\"%s\": {%s", buf.str, json->item_start_end);
  1409.         } else {
  1410.             printf("{%s", json->item_start_end);
  1411.  
  1412.             /* this is required so the parser can distinguish between packets and frames */
  1413.             if (parent_section && parent_section->id == SECTION_ID_PACKETS_AND_FRAMES) {
  1414.                 if (!json->compact)
  1415.                     JSON_INDENT();
  1416.                 printf("\"type\": \"%s\"%s", section->name, json->item_sep);
  1417.             }
  1418.         }
  1419.         av_bprint_finalize(&buf, NULL);
  1420.     }
  1421. }
  1422.  
  1423. static void json_print_section_footer(WriterContext *wctx)
  1424. {
  1425.     JSONContext *json = wctx->priv;
  1426.     const struct section *section = wctx->section[wctx->level];
  1427.  
  1428.     if (wctx->level == 0) {
  1429.         json->indent_level--;
  1430.         printf("\n}\n");
  1431.     } else if (section->flags & SECTION_FLAG_IS_ARRAY) {
  1432.         printf("\n");
  1433.         json->indent_level--;
  1434.         JSON_INDENT();
  1435.         printf("]");
  1436.     } else {
  1437.         printf("%s", json->item_start_end);
  1438.         json->indent_level--;
  1439.         if (!json->compact)
  1440.             JSON_INDENT();
  1441.         printf("}");
  1442.     }
  1443. }
  1444.  
  1445. static inline void json_print_item_str(WriterContext *wctx,
  1446.                                        const char *key, const char *value)
  1447. {
  1448.     AVBPrint buf;
  1449.  
  1450.     av_bprint_init(&buf, 1, AV_BPRINT_SIZE_UNLIMITED);
  1451.     printf("\"%s\":", json_escape_str(&buf, key,   wctx));
  1452.     av_bprint_clear(&buf);
  1453.     printf(" \"%s\"", json_escape_str(&buf, value, wctx));
  1454.     av_bprint_finalize(&buf, NULL);
  1455. }
  1456.  
  1457. static void json_print_str(WriterContext *wctx, const char *key, const char *value)
  1458. {
  1459.     JSONContext *json = wctx->priv;
  1460.  
  1461.     if (wctx->nb_item[wctx->level])
  1462.         printf("%s", json->item_sep);
  1463.     if (!json->compact)
  1464.         JSON_INDENT();
  1465.     json_print_item_str(wctx, key, value);
  1466. }
  1467.  
  1468. static void json_print_int(WriterContext *wctx, const char *key, long long int value)
  1469. {
  1470.     JSONContext *json = wctx->priv;
  1471.     AVBPrint buf;
  1472.  
  1473.     if (wctx->nb_item[wctx->level])
  1474.         printf("%s", json->item_sep);
  1475.     if (!json->compact)
  1476.         JSON_INDENT();
  1477.  
  1478.     av_bprint_init(&buf, 1, AV_BPRINT_SIZE_UNLIMITED);
  1479.     printf("\"%s\": %lld", json_escape_str(&buf, key, wctx), value);
  1480.     av_bprint_finalize(&buf, NULL);
  1481. }
  1482.  
  1483. static const Writer json_writer = {
  1484.     .name                 = "json",
  1485.     .priv_size            = sizeof(JSONContext),
  1486.     .init                 = json_init,
  1487.     .print_section_header = json_print_section_header,
  1488.     .print_section_footer = json_print_section_footer,
  1489.     .print_integer        = json_print_int,
  1490.     .print_string         = json_print_str,
  1491.     .flags = WRITER_FLAG_PUT_PACKETS_AND_FRAMES_IN_SAME_CHAPTER,
  1492.     .priv_class           = &json_class,
  1493. };
  1494.  
  1495. /* XML output */
  1496.  
  1497. typedef struct XMLContext {
  1498.     const AVClass *class;
  1499.     int within_tag;
  1500.     int indent_level;
  1501.     int fully_qualified;
  1502.     int xsd_strict;
  1503. } XMLContext;
  1504.  
  1505. #undef OFFSET
  1506. #define OFFSET(x) offsetof(XMLContext, x)
  1507.  
  1508. static const AVOption xml_options[] = {
  1509.     {"fully_qualified", "specify if the output should be fully qualified", OFFSET(fully_qualified), AV_OPT_TYPE_INT, {.i64=0},  0, 1 },
  1510.     {"q",               "specify if the output should be fully qualified", OFFSET(fully_qualified), AV_OPT_TYPE_INT, {.i64=0},  0, 1 },
  1511.     {"xsd_strict",      "ensure that the output is XSD compliant",         OFFSET(xsd_strict),      AV_OPT_TYPE_INT, {.i64=0},  0, 1 },
  1512.     {"x",               "ensure that the output is XSD compliant",         OFFSET(xsd_strict),      AV_OPT_TYPE_INT, {.i64=0},  0, 1 },
  1513.     {NULL},
  1514. };
  1515.  
  1516. DEFINE_WRITER_CLASS(xml);
  1517.  
  1518. static av_cold int xml_init(WriterContext *wctx)
  1519. {
  1520.     XMLContext *xml = wctx->priv;
  1521.  
  1522.     if (xml->xsd_strict) {
  1523.         xml->fully_qualified = 1;
  1524. #define CHECK_COMPLIANCE(opt, opt_name)                                 \
  1525.         if (opt) {                                                      \
  1526.             av_log(wctx, AV_LOG_ERROR,                                  \
  1527.                    "XSD-compliant output selected but option '%s' was selected, XML output may be non-compliant.\n" \
  1528.                    "You need to disable such option with '-no%s'\n", opt_name, opt_name); \
  1529.             return AVERROR(EINVAL);                                     \
  1530.         }
  1531.         CHECK_COMPLIANCE(show_private_data, "private");
  1532.         CHECK_COMPLIANCE(show_value_unit,   "unit");
  1533.         CHECK_COMPLIANCE(use_value_prefix,  "prefix");
  1534.  
  1535.         if (do_show_frames && do_show_packets) {
  1536.             av_log(wctx, AV_LOG_ERROR,
  1537.                    "Interleaved frames and packets are not allowed in XSD. "
  1538.                    "Select only one between the -show_frames and the -show_packets options.\n");
  1539.             return AVERROR(EINVAL);
  1540.         }
  1541.     }
  1542.  
  1543.     return 0;
  1544. }
  1545.  
  1546. static const char *xml_escape_str(AVBPrint *dst, const char *src, void *log_ctx)
  1547. {
  1548.     const char *p;
  1549.  
  1550.     for (p = src; *p; p++) {
  1551.         switch (*p) {
  1552.         case '&' : av_bprintf(dst, "%s", "&amp;");  break;
  1553.         case '<' : av_bprintf(dst, "%s", "&lt;");   break;
  1554.         case '>' : av_bprintf(dst, "%s", "&gt;");   break;
  1555.         case '"' : av_bprintf(dst, "%s", "&quot;"); break;
  1556.         case '\'': av_bprintf(dst, "%s", "&apos;"); break;
  1557.         default: av_bprint_chars(dst, *p, 1);
  1558.         }
  1559.     }
  1560.  
  1561.     return dst->str;
  1562. }
  1563.  
  1564. #define XML_INDENT() printf("%*c", xml->indent_level * 4, ' ')
  1565.  
  1566. static void xml_print_section_header(WriterContext *wctx)
  1567. {
  1568.     XMLContext *xml = wctx->priv;
  1569.     const struct section *section = wctx->section[wctx->level];
  1570.     const struct section *parent_section = wctx->level ?
  1571.         wctx->section[wctx->level-1] : NULL;
  1572.  
  1573.     if (wctx->level == 0) {
  1574.         const char *qual = " xmlns:xsi='http://www.w3.org/2001/XMLSchema-instance' "
  1575.             "xmlns:ffprobe='http://www.ffmpeg.org/schema/ffprobe' "
  1576.             "xsi:schemaLocation='http://www.ffmpeg.org/schema/ffprobe ffprobe.xsd'";
  1577.  
  1578.         printf("<?xml version=\"1.0\" encoding=\"UTF-8\"?>\n");
  1579.         printf("<%sffprobe%s>\n",
  1580.                xml->fully_qualified ? "ffprobe:" : "",
  1581.                xml->fully_qualified ? qual : "");
  1582.         return;
  1583.     }
  1584.  
  1585.     if (xml->within_tag) {
  1586.         xml->within_tag = 0;
  1587.         printf(">\n");
  1588.     }
  1589.     if (section->flags & SECTION_FLAG_HAS_VARIABLE_FIELDS) {
  1590.         xml->indent_level++;
  1591.     } else {
  1592.         if (parent_section && (parent_section->flags & SECTION_FLAG_IS_WRAPPER) &&
  1593.             wctx->level && wctx->nb_item[wctx->level-1])
  1594.             printf("\n");
  1595.         xml->indent_level++;
  1596.  
  1597.         if (section->flags & SECTION_FLAG_IS_ARRAY) {
  1598.             XML_INDENT(); printf("<%s>\n", section->name);
  1599.         } else {
  1600.             XML_INDENT(); printf("<%s ", section->name);
  1601.             xml->within_tag = 1;
  1602.         }
  1603.     }
  1604. }
  1605.  
  1606. static void xml_print_section_footer(WriterContext *wctx)
  1607. {
  1608.     XMLContext *xml = wctx->priv;
  1609.     const struct section *section = wctx->section[wctx->level];
  1610.  
  1611.     if (wctx->level == 0) {
  1612.         printf("</%sffprobe>\n", xml->fully_qualified ? "ffprobe:" : "");
  1613.     } else if (xml->within_tag) {
  1614.         xml->within_tag = 0;
  1615.         printf("/>\n");
  1616.         xml->indent_level--;
  1617.     } else if (section->flags & SECTION_FLAG_HAS_VARIABLE_FIELDS) {
  1618.         xml->indent_level--;
  1619.     } else {
  1620.         XML_INDENT(); printf("</%s>\n", section->name);
  1621.         xml->indent_level--;
  1622.     }
  1623. }
  1624.  
  1625. static void xml_print_str(WriterContext *wctx, const char *key, const char *value)
  1626. {
  1627.     AVBPrint buf;
  1628.     XMLContext *xml = wctx->priv;
  1629.     const struct section *section = wctx->section[wctx->level];
  1630.  
  1631.     av_bprint_init(&buf, 1, AV_BPRINT_SIZE_UNLIMITED);
  1632.  
  1633.     if (section->flags & SECTION_FLAG_HAS_VARIABLE_FIELDS) {
  1634.         XML_INDENT();
  1635.         printf("<%s key=\"%s\"",
  1636.                section->element_name, xml_escape_str(&buf, key, wctx));
  1637.         av_bprint_clear(&buf);
  1638.         printf(" value=\"%s\"/>\n", xml_escape_str(&buf, value, wctx));
  1639.     } else {
  1640.         if (wctx->nb_item[wctx->level])
  1641.             printf(" ");
  1642.         printf("%s=\"%s\"", key, xml_escape_str(&buf, value, wctx));
  1643.     }
  1644.  
  1645.     av_bprint_finalize(&buf, NULL);
  1646. }
  1647.  
  1648. static void xml_print_int(WriterContext *wctx, const char *key, long long int value)
  1649. {
  1650.     if (wctx->nb_item[wctx->level])
  1651.         printf(" ");
  1652.     printf("%s=\"%lld\"", key, value);
  1653. }
  1654.  
  1655. static Writer xml_writer = {
  1656.     .name                 = "xml",
  1657.     .priv_size            = sizeof(XMLContext),
  1658.     .init                 = xml_init,
  1659.     .print_section_header = xml_print_section_header,
  1660.     .print_section_footer = xml_print_section_footer,
  1661.     .print_integer        = xml_print_int,
  1662.     .print_string         = xml_print_str,
  1663.     .flags = WRITER_FLAG_PUT_PACKETS_AND_FRAMES_IN_SAME_CHAPTER,
  1664.     .priv_class           = &xml_class,
  1665. };
  1666.  
  1667. static void writer_register_all(void)
  1668. {
  1669.     static int initialized;
  1670.  
  1671.     if (initialized)
  1672.         return;
  1673.     initialized = 1;
  1674.  
  1675.     writer_register(&default_writer);
  1676.     writer_register(&compact_writer);
  1677.     writer_register(&csv_writer);
  1678.     writer_register(&flat_writer);
  1679.     writer_register(&ini_writer);
  1680.     writer_register(&json_writer);
  1681.     writer_register(&xml_writer);
  1682. }
  1683.  
  1684. #define print_fmt(k, f, ...) do {              \
  1685.     av_bprint_clear(&pbuf);                    \
  1686.     av_bprintf(&pbuf, f, __VA_ARGS__);         \
  1687.     writer_print_string(w, k, pbuf.str, 0);    \
  1688. } while (0)
  1689.  
  1690. #define print_int(k, v)         writer_print_integer(w, k, v)
  1691. #define print_q(k, v, s)        writer_print_rational(w, k, v, s)
  1692. #define print_str(k, v)         writer_print_string(w, k, v, 0)
  1693. #define print_str_opt(k, v)     writer_print_string(w, k, v, PRINT_STRING_OPT)
  1694. #define print_str_validate(k, v) writer_print_string(w, k, v, PRINT_STRING_VALIDATE)
  1695. #define print_time(k, v, tb)    writer_print_time(w, k, v, tb, 0)
  1696. #define print_ts(k, v)          writer_print_ts(w, k, v, 0)
  1697. #define print_duration_time(k, v, tb) writer_print_time(w, k, v, tb, 1)
  1698. #define print_duration_ts(k, v)       writer_print_ts(w, k, v, 1)
  1699. #define print_val(k, v, u) do {                                     \
  1700.     struct unit_value uv;                                           \
  1701.     uv.val.i = v;                                                   \
  1702.     uv.unit = u;                                                    \
  1703.     writer_print_string(w, k, value_string(val_str, sizeof(val_str), uv), 0); \
  1704. } while (0)
  1705.  
  1706. #define print_section_header(s) writer_print_section_header(w, s)
  1707. #define print_section_footer(s) writer_print_section_footer(w, s)
  1708.  
  1709. #define REALLOCZ_ARRAY_STREAM(ptr, cur_n, new_n)                        \
  1710. {                                                                       \
  1711.     ret = av_reallocp_array(&(ptr), (new_n), sizeof(*(ptr)));           \
  1712.     if (ret < 0)                                                        \
  1713.         goto end;                                                       \
  1714.     memset( (ptr) + (cur_n), 0, ((new_n) - (cur_n)) * sizeof(*(ptr)) ); \
  1715. }
  1716.  
  1717. static inline int show_tags(WriterContext *w, AVDictionary *tags, int section_id)
  1718. {
  1719.     AVDictionaryEntry *tag = NULL;
  1720.     int ret = 0;
  1721.  
  1722.     if (!tags)
  1723.         return 0;
  1724.     writer_print_section_header(w, section_id);
  1725.  
  1726.     while ((tag = av_dict_get(tags, "", tag, AV_DICT_IGNORE_SUFFIX))) {
  1727.         if ((ret = print_str_validate(tag->key, tag->value)) < 0)
  1728.             break;
  1729.     }
  1730.     writer_print_section_footer(w);
  1731.  
  1732.     return ret;
  1733. }
  1734.  
  1735. static void show_packet(WriterContext *w, AVFormatContext *fmt_ctx, AVPacket *pkt, int packet_idx)
  1736. {
  1737.     char val_str[128];
  1738.     AVStream *st = fmt_ctx->streams[pkt->stream_index];
  1739.     AVBPrint pbuf;
  1740.     const char *s;
  1741.  
  1742.     av_bprint_init(&pbuf, 1, AV_BPRINT_SIZE_UNLIMITED);
  1743.  
  1744.     writer_print_section_header(w, SECTION_ID_PACKET);
  1745.  
  1746.     s = av_get_media_type_string(st->codec->codec_type);
  1747.     if (s) print_str    ("codec_type", s);
  1748.     else   print_str_opt("codec_type", "unknown");
  1749.     print_int("stream_index",     pkt->stream_index);
  1750.     print_ts  ("pts",             pkt->pts);
  1751.     print_time("pts_time",        pkt->pts, &st->time_base);
  1752.     print_ts  ("dts",             pkt->dts);
  1753.     print_time("dts_time",        pkt->dts, &st->time_base);
  1754.     print_duration_ts("duration",        pkt->duration);
  1755.     print_duration_time("duration_time", pkt->duration, &st->time_base);
  1756.     print_duration_ts("convergence_duration", pkt->convergence_duration);
  1757.     print_duration_time("convergence_duration_time", pkt->convergence_duration, &st->time_base);
  1758.     print_val("size",             pkt->size, unit_byte_str);
  1759.     if (pkt->pos != -1) print_fmt    ("pos", "%"PRId64, pkt->pos);
  1760.     else                print_str_opt("pos", "N/A");
  1761.     print_fmt("flags", "%c",      pkt->flags & AV_PKT_FLAG_KEY ? 'K' : '_');
  1762.  
  1763.     if (pkt->side_data_elems) {
  1764.         int i;
  1765.         writer_print_section_header(w, SECTION_ID_PACKET_SIDE_DATA_LIST);
  1766.         for (i = 0; i < pkt->side_data_elems; i++) {
  1767.             AVPacketSideData *sd = &pkt->side_data[i];
  1768.             const char *name = av_packet_side_data_name(sd->type);
  1769.             writer_print_section_header(w, SECTION_ID_PACKET_SIDE_DATA);
  1770.             print_str("side_data_type", name ? name : "unknown");
  1771.             print_int("side_data_size", sd->size);
  1772.             if (sd->type == AV_PKT_DATA_DISPLAYMATRIX && sd->size >= 9*4) {
  1773.                 writer_print_integers(w, "displaymatrix", sd->data, 9, " %11d", 3, 4, 1);
  1774.                 print_int("rotation", av_display_rotation_get((int32_t *)sd->data));
  1775.             }
  1776.             writer_print_section_footer(w);
  1777.         }
  1778.         writer_print_section_footer(w);
  1779.     }
  1780.  
  1781.     if (do_show_data)
  1782.         writer_print_data(w, "data", pkt->data, pkt->size);
  1783.     writer_print_data_hash(w, "data_hash", pkt->data, pkt->size);
  1784.     writer_print_section_footer(w);
  1785.  
  1786.     av_bprint_finalize(&pbuf, NULL);
  1787.     fflush(stdout);
  1788. }
  1789.  
  1790. static void show_subtitle(WriterContext *w, AVSubtitle *sub, AVStream *stream,
  1791.                           AVFormatContext *fmt_ctx)
  1792. {
  1793.     AVBPrint pbuf;
  1794.  
  1795.     av_bprint_init(&pbuf, 1, AV_BPRINT_SIZE_UNLIMITED);
  1796.  
  1797.     writer_print_section_header(w, SECTION_ID_SUBTITLE);
  1798.  
  1799.     print_str ("media_type",         "subtitle");
  1800.     print_ts  ("pts",                 sub->pts);
  1801.     print_time("pts_time",            sub->pts, &AV_TIME_BASE_Q);
  1802.     print_int ("format",              sub->format);
  1803.     print_int ("start_display_time",  sub->start_display_time);
  1804.     print_int ("end_display_time",    sub->end_display_time);
  1805.     print_int ("num_rects",           sub->num_rects);
  1806.  
  1807.     writer_print_section_footer(w);
  1808.  
  1809.     av_bprint_finalize(&pbuf, NULL);
  1810.     fflush(stdout);
  1811. }
  1812.  
  1813. static void show_frame(WriterContext *w, AVFrame *frame, AVStream *stream,
  1814.                        AVFormatContext *fmt_ctx)
  1815. {
  1816.     AVBPrint pbuf;
  1817.     const char *s;
  1818.     int i;
  1819.  
  1820.     av_bprint_init(&pbuf, 1, AV_BPRINT_SIZE_UNLIMITED);
  1821.  
  1822.     writer_print_section_header(w, SECTION_ID_FRAME);
  1823.  
  1824.     s = av_get_media_type_string(stream->codec->codec_type);
  1825.     if (s) print_str    ("media_type", s);
  1826.     else   print_str_opt("media_type", "unknown");
  1827.     print_int("stream_index",           stream->index);
  1828.     print_int("key_frame",              frame->key_frame);
  1829.     print_ts  ("pkt_pts",               frame->pkt_pts);
  1830.     print_time("pkt_pts_time",          frame->pkt_pts, &stream->time_base);
  1831.     print_ts  ("pkt_dts",               frame->pkt_dts);
  1832.     print_time("pkt_dts_time",          frame->pkt_dts, &stream->time_base);
  1833.     print_ts  ("best_effort_timestamp", av_frame_get_best_effort_timestamp(frame));
  1834.     print_time("best_effort_timestamp_time", av_frame_get_best_effort_timestamp(frame), &stream->time_base);
  1835.     print_duration_ts  ("pkt_duration",      av_frame_get_pkt_duration(frame));
  1836.     print_duration_time("pkt_duration_time", av_frame_get_pkt_duration(frame), &stream->time_base);
  1837.     if (av_frame_get_pkt_pos (frame) != -1) print_fmt    ("pkt_pos", "%"PRId64, av_frame_get_pkt_pos(frame));
  1838.     else                      print_str_opt("pkt_pos", "N/A");
  1839.     if (av_frame_get_pkt_size(frame) != -1) print_fmt    ("pkt_size", "%d", av_frame_get_pkt_size(frame));
  1840.     else                       print_str_opt("pkt_size", "N/A");
  1841.  
  1842.     switch (stream->codec->codec_type) {
  1843.         AVRational sar;
  1844.  
  1845.     case AVMEDIA_TYPE_VIDEO:
  1846.         print_int("width",                  frame->width);
  1847.         print_int("height",                 frame->height);
  1848.         s = av_get_pix_fmt_name(frame->format);
  1849.         if (s) print_str    ("pix_fmt", s);
  1850.         else   print_str_opt("pix_fmt", "unknown");
  1851.         sar = av_guess_sample_aspect_ratio(fmt_ctx, stream, frame);
  1852.         if (sar.num) {
  1853.             print_q("sample_aspect_ratio", sar, ':');
  1854.         } else {
  1855.             print_str_opt("sample_aspect_ratio", "N/A");
  1856.         }
  1857.         print_fmt("pict_type",              "%c", av_get_picture_type_char(frame->pict_type));
  1858.         print_int("coded_picture_number",   frame->coded_picture_number);
  1859.         print_int("display_picture_number", frame->display_picture_number);
  1860.         print_int("interlaced_frame",       frame->interlaced_frame);
  1861.         print_int("top_field_first",        frame->top_field_first);
  1862.         print_int("repeat_pict",            frame->repeat_pict);
  1863.         break;
  1864.  
  1865.     case AVMEDIA_TYPE_AUDIO:
  1866.         s = av_get_sample_fmt_name(frame->format);
  1867.         if (s) print_str    ("sample_fmt", s);
  1868.         else   print_str_opt("sample_fmt", "unknown");
  1869.         print_int("nb_samples",         frame->nb_samples);
  1870.         print_int("channels", av_frame_get_channels(frame));
  1871.         if (av_frame_get_channel_layout(frame)) {
  1872.             av_bprint_clear(&pbuf);
  1873.             av_bprint_channel_layout(&pbuf, av_frame_get_channels(frame),
  1874.                                      av_frame_get_channel_layout(frame));
  1875.             print_str    ("channel_layout", pbuf.str);
  1876.         } else
  1877.             print_str_opt("channel_layout", "unknown");
  1878.         break;
  1879.     }
  1880.     if (do_show_frame_tags)
  1881.         show_tags(w, av_frame_get_metadata(frame), SECTION_ID_FRAME_TAGS);
  1882.     if (frame->nb_side_data) {
  1883.         writer_print_section_header(w, SECTION_ID_FRAME_SIDE_DATA_LIST);
  1884.         for (i = 0; i < frame->nb_side_data; i++) {
  1885.             AVFrameSideData *sd = frame->side_data[i];
  1886.             const char *name;
  1887.  
  1888.             writer_print_section_header(w, SECTION_ID_FRAME_SIDE_DATA);
  1889.             name = av_frame_side_data_name(sd->type);
  1890.             print_str("side_data_type", name ? name : "unknown");
  1891.             print_int("side_data_size", sd->size);
  1892.             if (sd->type == AV_FRAME_DATA_DISPLAYMATRIX && sd->size >= 9*4) {
  1893.                 abort();
  1894.                 writer_print_integers(w, "displaymatrix", sd->data, 9, " %11d", 3, 4, 1);
  1895.                 print_int("rotation", av_display_rotation_get((int32_t *)sd->data));
  1896.             }
  1897.             writer_print_section_footer(w);
  1898.         }
  1899.         writer_print_section_footer(w);
  1900.     }
  1901.  
  1902.     writer_print_section_footer(w);
  1903.  
  1904.     av_bprint_finalize(&pbuf, NULL);
  1905.     fflush(stdout);
  1906. }
  1907.  
  1908. static av_always_inline int process_frame(WriterContext *w,
  1909.                                           AVFormatContext *fmt_ctx,
  1910.                                           AVFrame *frame, AVPacket *pkt)
  1911. {
  1912.     AVCodecContext *dec_ctx = fmt_ctx->streams[pkt->stream_index]->codec;
  1913.     AVSubtitle sub;
  1914.     int ret = 0, got_frame = 0;
  1915.  
  1916.     if (dec_ctx->codec) {
  1917.         switch (dec_ctx->codec_type) {
  1918.         case AVMEDIA_TYPE_VIDEO:
  1919.             ret = avcodec_decode_video2(dec_ctx, frame, &got_frame, pkt);
  1920.             break;
  1921.  
  1922.         case AVMEDIA_TYPE_AUDIO:
  1923.             ret = avcodec_decode_audio4(dec_ctx, frame, &got_frame, pkt);
  1924.             break;
  1925.  
  1926.         case AVMEDIA_TYPE_SUBTITLE:
  1927.             ret = avcodec_decode_subtitle2(dec_ctx, &sub, &got_frame, pkt);
  1928.             break;
  1929.         }
  1930.     }
  1931.  
  1932.     if (ret < 0)
  1933.         return ret;
  1934.     ret = FFMIN(ret, pkt->size); /* guard against bogus return values */
  1935.     pkt->data += ret;
  1936.     pkt->size -= ret;
  1937.     if (got_frame) {
  1938.         int is_sub = (dec_ctx->codec_type == AVMEDIA_TYPE_SUBTITLE);
  1939.         nb_streams_frames[pkt->stream_index]++;
  1940.         if (do_show_frames)
  1941.             if (is_sub)
  1942.                 show_subtitle(w, &sub, fmt_ctx->streams[pkt->stream_index], fmt_ctx);
  1943.             else
  1944.                 show_frame(w, frame, fmt_ctx->streams[pkt->stream_index], fmt_ctx);
  1945.         if (is_sub)
  1946.             avsubtitle_free(&sub);
  1947.     }
  1948.     return got_frame;
  1949. }
  1950.  
  1951. static void log_read_interval(const ReadInterval *interval, void *log_ctx, int log_level)
  1952. {
  1953.     av_log(log_ctx, log_level, "id:%d", interval->id);
  1954.  
  1955.     if (interval->has_start) {
  1956.         av_log(log_ctx, log_level, " start:%s%s", interval->start_is_offset ? "+" : "",
  1957.                av_ts2timestr(interval->start, &AV_TIME_BASE_Q));
  1958.     } else {
  1959.         av_log(log_ctx, log_level, " start:N/A");
  1960.     }
  1961.  
  1962.     if (interval->has_end) {
  1963.         av_log(log_ctx, log_level, " end:%s", interval->end_is_offset ? "+" : "");
  1964.         if (interval->duration_frames)
  1965.             av_log(log_ctx, log_level, "#%"PRId64, interval->end);
  1966.         else
  1967.             av_log(log_ctx, log_level, "%s", av_ts2timestr(interval->end, &AV_TIME_BASE_Q));
  1968.     } else {
  1969.         av_log(log_ctx, log_level, " end:N/A");
  1970.     }
  1971.  
  1972.     av_log(log_ctx, log_level, "\n");
  1973. }
  1974.  
  1975. static int read_interval_packets(WriterContext *w, AVFormatContext *fmt_ctx,
  1976.                                  const ReadInterval *interval, int64_t *cur_ts)
  1977. {
  1978.     AVPacket pkt, pkt1;
  1979.     AVFrame *frame = NULL;
  1980.     int ret = 0, i = 0, frame_count = 0;
  1981.     int64_t start = -INT64_MAX, end = interval->end;
  1982.     int has_start = 0, has_end = interval->has_end && !interval->end_is_offset;
  1983.  
  1984.     av_init_packet(&pkt);
  1985.  
  1986.     av_log(NULL, AV_LOG_VERBOSE, "Processing read interval ");
  1987.     log_read_interval(interval, NULL, AV_LOG_VERBOSE);
  1988.  
  1989.     if (interval->has_start) {
  1990.         int64_t target;
  1991.         if (interval->start_is_offset) {
  1992.             if (*cur_ts == AV_NOPTS_VALUE) {
  1993.                 av_log(NULL, AV_LOG_ERROR,
  1994.                        "Could not seek to relative position since current "
  1995.                        "timestamp is not defined\n");
  1996.                 ret = AVERROR(EINVAL);
  1997.                 goto end;
  1998.             }
  1999.             target = *cur_ts + interval->start;
  2000.         } else {
  2001.             target = interval->start;
  2002.         }
  2003.  
  2004.         av_log(NULL, AV_LOG_VERBOSE, "Seeking to read interval start point %s\n",
  2005.                av_ts2timestr(target, &AV_TIME_BASE_Q));
  2006.         if ((ret = avformat_seek_file(fmt_ctx, -1, -INT64_MAX, target, INT64_MAX, 0)) < 0) {
  2007.             av_log(NULL, AV_LOG_ERROR, "Could not seek to position %"PRId64": %s\n",
  2008.                    interval->start, av_err2str(ret));
  2009.             goto end;
  2010.         }
  2011.     }
  2012.  
  2013.     frame = av_frame_alloc();
  2014.     if (!frame) {
  2015.         ret = AVERROR(ENOMEM);
  2016.         goto end;
  2017.     }
  2018.     while (!av_read_frame(fmt_ctx, &pkt)) {
  2019.         if (fmt_ctx->nb_streams > nb_streams) {
  2020.             REALLOCZ_ARRAY_STREAM(nb_streams_frames,  nb_streams, fmt_ctx->nb_streams);
  2021.             REALLOCZ_ARRAY_STREAM(nb_streams_packets, nb_streams, fmt_ctx->nb_streams);
  2022.             REALLOCZ_ARRAY_STREAM(selected_streams,   nb_streams, fmt_ctx->nb_streams);
  2023.             nb_streams = fmt_ctx->nb_streams;
  2024.         }
  2025.         if (selected_streams[pkt.stream_index]) {
  2026.             AVRational tb = fmt_ctx->streams[pkt.stream_index]->time_base;
  2027.  
  2028.             if (pkt.pts != AV_NOPTS_VALUE)
  2029.                 *cur_ts = av_rescale_q(pkt.pts, tb, AV_TIME_BASE_Q);
  2030.  
  2031.             if (!has_start && *cur_ts != AV_NOPTS_VALUE) {
  2032.                 start = *cur_ts;
  2033.                 has_start = 1;
  2034.             }
  2035.  
  2036.             if (has_start && !has_end && interval->end_is_offset) {
  2037.                 end = start + interval->end;
  2038.                 has_end = 1;
  2039.             }
  2040.  
  2041.             if (interval->end_is_offset && interval->duration_frames) {
  2042.                 if (frame_count >= interval->end)
  2043.                     break;
  2044.             } else if (has_end && *cur_ts != AV_NOPTS_VALUE && *cur_ts >= end) {
  2045.                 break;
  2046.             }
  2047.  
  2048.             frame_count++;
  2049.             if (do_read_packets) {
  2050.                 if (do_show_packets)
  2051.                     show_packet(w, fmt_ctx, &pkt, i++);
  2052.                 nb_streams_packets[pkt.stream_index]++;
  2053.             }
  2054.             if (do_read_frames) {
  2055.                 pkt1 = pkt;
  2056.                 while (pkt1.size && process_frame(w, fmt_ctx, frame, &pkt1) > 0);
  2057.             }
  2058.         }
  2059.         av_free_packet(&pkt);
  2060.     }
  2061.     av_init_packet(&pkt);
  2062.     pkt.data = NULL;
  2063.     pkt.size = 0;
  2064.     //Flush remaining frames that are cached in the decoder
  2065.     for (i = 0; i < fmt_ctx->nb_streams; i++) {
  2066.         pkt.stream_index = i;
  2067.         if (do_read_frames)
  2068.             while (process_frame(w, fmt_ctx, frame, &pkt) > 0);
  2069.     }
  2070.  
  2071. end:
  2072.     av_frame_free(&frame);
  2073.     if (ret < 0) {
  2074.         av_log(NULL, AV_LOG_ERROR, "Could not read packets in interval ");
  2075.         log_read_interval(interval, NULL, AV_LOG_ERROR);
  2076.     }
  2077.     return ret;
  2078. }
  2079.  
  2080. static int read_packets(WriterContext *w, AVFormatContext *fmt_ctx)
  2081. {
  2082.     int i, ret = 0;
  2083.     int64_t cur_ts = fmt_ctx->start_time;
  2084.  
  2085.     if (read_intervals_nb == 0) {
  2086.         ReadInterval interval = (ReadInterval) { .has_start = 0, .has_end = 0 };
  2087.         ret = read_interval_packets(w, fmt_ctx, &interval, &cur_ts);
  2088.     } else {
  2089.         for (i = 0; i < read_intervals_nb; i++) {
  2090.             ret = read_interval_packets(w, fmt_ctx, &read_intervals[i], &cur_ts);
  2091.             if (ret < 0)
  2092.                 break;
  2093.         }
  2094.     }
  2095.  
  2096.     return ret;
  2097. }
  2098.  
  2099. static int show_stream(WriterContext *w, AVFormatContext *fmt_ctx, int stream_idx, int in_program)
  2100. {
  2101.     AVStream *stream = fmt_ctx->streams[stream_idx];
  2102.     AVCodecContext *dec_ctx;
  2103.     const AVCodec *dec;
  2104.     char val_str[128];
  2105.     const char *s;
  2106.     AVRational sar, dar;
  2107.     AVBPrint pbuf;
  2108.     const AVCodecDescriptor *cd;
  2109.     int ret = 0;
  2110.  
  2111.     av_bprint_init(&pbuf, 1, AV_BPRINT_SIZE_UNLIMITED);
  2112.  
  2113.     writer_print_section_header(w, in_program ? SECTION_ID_PROGRAM_STREAM : SECTION_ID_STREAM);
  2114.  
  2115.     print_int("index", stream->index);
  2116.  
  2117.     if ((dec_ctx = stream->codec)) {
  2118.         const char *profile = NULL;
  2119.         dec = dec_ctx->codec;
  2120.         if (dec) {
  2121.             print_str("codec_name", dec->name);
  2122.             if (!do_bitexact) {
  2123.                 if (dec->long_name) print_str    ("codec_long_name", dec->long_name);
  2124.                 else                print_str_opt("codec_long_name", "unknown");
  2125.             }
  2126.         } else if ((cd = avcodec_descriptor_get(stream->codec->codec_id))) {
  2127.             print_str_opt("codec_name", cd->name);
  2128.             if (!do_bitexact) {
  2129.                 print_str_opt("codec_long_name",
  2130.                               cd->long_name ? cd->long_name : "unknown");
  2131.             }
  2132.         } else {
  2133.             print_str_opt("codec_name", "unknown");
  2134.             if (!do_bitexact) {
  2135.                 print_str_opt("codec_long_name", "unknown");
  2136.             }
  2137.         }
  2138.  
  2139.         if (dec && (profile = av_get_profile_name(dec, dec_ctx->profile)))
  2140.             print_str("profile", profile);
  2141.         else
  2142.             print_str_opt("profile", "unknown");
  2143.  
  2144.         s = av_get_media_type_string(dec_ctx->codec_type);
  2145.         if (s) print_str    ("codec_type", s);
  2146.         else   print_str_opt("codec_type", "unknown");
  2147.         print_q("codec_time_base", dec_ctx->time_base, '/');
  2148.  
  2149.         /* print AVI/FourCC tag */
  2150.         av_get_codec_tag_string(val_str, sizeof(val_str), dec_ctx->codec_tag);
  2151.         print_str("codec_tag_string",    val_str);
  2152.         print_fmt("codec_tag", "0x%04x", dec_ctx->codec_tag);
  2153.  
  2154.         switch (dec_ctx->codec_type) {
  2155.         case AVMEDIA_TYPE_VIDEO:
  2156.             print_int("width",        dec_ctx->width);
  2157.             print_int("height",       dec_ctx->height);
  2158.             print_int("coded_width",  dec_ctx->coded_width);
  2159.             print_int("coded_height", dec_ctx->coded_height);
  2160.             print_int("has_b_frames", dec_ctx->has_b_frames);
  2161.             sar = av_guess_sample_aspect_ratio(fmt_ctx, stream, NULL);
  2162.             if (sar.den) {
  2163.                 print_q("sample_aspect_ratio", sar, ':');
  2164.                 av_reduce(&dar.num, &dar.den,
  2165.                           dec_ctx->width  * sar.num,
  2166.                           dec_ctx->height * sar.den,
  2167.                           1024*1024);
  2168.                 print_q("display_aspect_ratio", dar, ':');
  2169.             } else {
  2170.                 print_str_opt("sample_aspect_ratio", "N/A");
  2171.                 print_str_opt("display_aspect_ratio", "N/A");
  2172.             }
  2173.             s = av_get_pix_fmt_name(dec_ctx->pix_fmt);
  2174.             if (s) print_str    ("pix_fmt", s);
  2175.             else   print_str_opt("pix_fmt", "unknown");
  2176.             print_int("level",   dec_ctx->level);
  2177.             if (dec_ctx->color_range != AVCOL_RANGE_UNSPECIFIED)
  2178.                 print_str    ("color_range", av_color_range_name(dec_ctx->color_range));
  2179.             else
  2180.                 print_str_opt("color_range", "N/A");
  2181.             s = av_get_colorspace_name(dec_ctx->colorspace);
  2182.             if (s) print_str    ("color_space", s);
  2183.             else   print_str_opt("color_space", "unknown");
  2184.  
  2185.             if (dec_ctx->color_trc != AVCOL_TRC_UNSPECIFIED)
  2186.                 print_str("color_transfer", av_color_transfer_name(dec_ctx->color_trc));
  2187.             else
  2188.                 print_str_opt("color_transfer", av_color_transfer_name(dec_ctx->color_trc));
  2189.  
  2190.             if (dec_ctx->color_primaries != AVCOL_PRI_UNSPECIFIED)
  2191.                 print_str("color_primaries", av_color_primaries_name(dec_ctx->color_primaries));
  2192.             else
  2193.                 print_str_opt("color_primaries", av_color_primaries_name(dec_ctx->color_primaries));
  2194.  
  2195.             if (dec_ctx->chroma_sample_location != AVCHROMA_LOC_UNSPECIFIED)
  2196.                 print_str("chroma_location", av_chroma_location_name(dec_ctx->chroma_sample_location));
  2197.             else
  2198.                 print_str_opt("chroma_location", av_chroma_location_name(dec_ctx->chroma_sample_location));
  2199.  
  2200.             if (dec_ctx->timecode_frame_start >= 0) {
  2201.                 char tcbuf[AV_TIMECODE_STR_SIZE];
  2202.                 av_timecode_make_mpeg_tc_string(tcbuf, dec_ctx->timecode_frame_start);
  2203.                 print_str("timecode", tcbuf);
  2204.             } else {
  2205.                 print_str_opt("timecode", "N/A");
  2206.             }
  2207.             print_int("refs", dec_ctx->refs);
  2208.             break;
  2209.  
  2210.         case AVMEDIA_TYPE_AUDIO:
  2211.             s = av_get_sample_fmt_name(dec_ctx->sample_fmt);
  2212.             if (s) print_str    ("sample_fmt", s);
  2213.             else   print_str_opt("sample_fmt", "unknown");
  2214.             print_val("sample_rate",     dec_ctx->sample_rate, unit_hertz_str);
  2215.             print_int("channels",        dec_ctx->channels);
  2216.  
  2217.             if (dec_ctx->channel_layout) {
  2218.                 av_bprint_clear(&pbuf);
  2219.                 av_bprint_channel_layout(&pbuf, dec_ctx->channels, dec_ctx->channel_layout);
  2220.                 print_str    ("channel_layout", pbuf.str);
  2221.             } else {
  2222.                 print_str_opt("channel_layout", "unknown");
  2223.             }
  2224.  
  2225.             print_int("bits_per_sample", av_get_bits_per_sample(dec_ctx->codec_id));
  2226.             break;
  2227.  
  2228.         case AVMEDIA_TYPE_SUBTITLE:
  2229.             if (dec_ctx->width)
  2230.                 print_int("width",       dec_ctx->width);
  2231.             else
  2232.                 print_str_opt("width",   "N/A");
  2233.             if (dec_ctx->height)
  2234.                 print_int("height",      dec_ctx->height);
  2235.             else
  2236.                 print_str_opt("height",  "N/A");
  2237.             break;
  2238.         }
  2239.     } else {
  2240.         print_str_opt("codec_type", "unknown");
  2241.     }
  2242.     if (dec_ctx->codec && dec_ctx->codec->priv_class && show_private_data) {
  2243.         const AVOption *opt = NULL;
  2244.         while (opt = av_opt_next(dec_ctx->priv_data,opt)) {
  2245.             uint8_t *str;
  2246.             if (opt->flags) continue;
  2247.             if (av_opt_get(dec_ctx->priv_data, opt->name, 0, &str) >= 0) {
  2248.                 print_str(opt->name, str);
  2249.                 av_free(str);
  2250.             }
  2251.         }
  2252.     }
  2253.  
  2254.     if (fmt_ctx->iformat->flags & AVFMT_SHOW_IDS) print_fmt    ("id", "0x%x", stream->id);
  2255.     else                                          print_str_opt("id", "N/A");
  2256.     print_q("r_frame_rate",   stream->r_frame_rate,   '/');
  2257.     print_q("avg_frame_rate", stream->avg_frame_rate, '/');
  2258.     print_q("time_base",      stream->time_base,      '/');
  2259.     print_ts  ("start_pts",   stream->start_time);
  2260.     print_time("start_time",  stream->start_time, &stream->time_base);
  2261.     print_ts  ("duration_ts", stream->duration);
  2262.     print_time("duration",    stream->duration, &stream->time_base);
  2263.     if (dec_ctx->bit_rate > 0) print_val    ("bit_rate", dec_ctx->bit_rate, unit_bit_per_second_str);
  2264.     else                       print_str_opt("bit_rate", "N/A");
  2265.     if (dec_ctx->rc_max_rate > 0) print_val ("max_bit_rate", dec_ctx->rc_max_rate, unit_bit_per_second_str);
  2266.     else                       print_str_opt("max_bit_rate", "N/A");
  2267.     if (dec_ctx->bits_per_raw_sample > 0) print_fmt("bits_per_raw_sample", "%d", dec_ctx->bits_per_raw_sample);
  2268.     else                       print_str_opt("bits_per_raw_sample", "N/A");
  2269.     if (stream->nb_frames) print_fmt    ("nb_frames", "%"PRId64, stream->nb_frames);
  2270.     else                   print_str_opt("nb_frames", "N/A");
  2271.     if (nb_streams_frames[stream_idx])  print_fmt    ("nb_read_frames", "%"PRIu64, nb_streams_frames[stream_idx]);
  2272.     else                                print_str_opt("nb_read_frames", "N/A");
  2273.     if (nb_streams_packets[stream_idx]) print_fmt    ("nb_read_packets", "%"PRIu64, nb_streams_packets[stream_idx]);
  2274.     else                                print_str_opt("nb_read_packets", "N/A");
  2275.     if (do_show_data)
  2276.         writer_print_data(w, "extradata", dec_ctx->extradata,
  2277.                                           dec_ctx->extradata_size);
  2278.     writer_print_data_hash(w, "extradata_hash", dec_ctx->extradata,
  2279.                                                 dec_ctx->extradata_size);
  2280.  
  2281.     /* Print disposition information */
  2282. #define PRINT_DISPOSITION(flagname, name) do {                                \
  2283.         print_int(name, !!(stream->disposition & AV_DISPOSITION_##flagname)); \
  2284.     } while (0)
  2285.  
  2286.     if (do_show_stream_disposition) {
  2287.     writer_print_section_header(w, in_program ? SECTION_ID_PROGRAM_STREAM_DISPOSITION : SECTION_ID_STREAM_DISPOSITION);
  2288.     PRINT_DISPOSITION(DEFAULT,          "default");
  2289.     PRINT_DISPOSITION(DUB,              "dub");
  2290.     PRINT_DISPOSITION(ORIGINAL,         "original");
  2291.     PRINT_DISPOSITION(COMMENT,          "comment");
  2292.     PRINT_DISPOSITION(LYRICS,           "lyrics");
  2293.     PRINT_DISPOSITION(KARAOKE,          "karaoke");
  2294.     PRINT_DISPOSITION(FORCED,           "forced");
  2295.     PRINT_DISPOSITION(HEARING_IMPAIRED, "hearing_impaired");
  2296.     PRINT_DISPOSITION(VISUAL_IMPAIRED,  "visual_impaired");
  2297.     PRINT_DISPOSITION(CLEAN_EFFECTS,    "clean_effects");
  2298.     PRINT_DISPOSITION(ATTACHED_PIC,     "attached_pic");
  2299.     writer_print_section_footer(w);
  2300.     }
  2301.  
  2302.     if (do_show_stream_tags)
  2303.         ret = show_tags(w, stream->metadata, in_program ? SECTION_ID_PROGRAM_STREAM_TAGS : SECTION_ID_STREAM_TAGS);
  2304.  
  2305.     if (stream->nb_side_data) {
  2306.         int i;
  2307.         writer_print_section_header(w, SECTION_ID_STREAM_SIDE_DATA_LIST);
  2308.         for (i = 0; i < stream->nb_side_data; i++) {
  2309.             AVPacketSideData *sd = &stream->side_data[i];
  2310.             const char *name = av_packet_side_data_name(sd->type);
  2311.  
  2312.             writer_print_section_header(w, SECTION_ID_STREAM_SIDE_DATA);
  2313.             print_str("side_data_type", name ? name : "unknown");
  2314.             print_int("side_data_size", sd->size);
  2315.             if (sd->type == AV_PKT_DATA_DISPLAYMATRIX && sd->size >= 9*4) {
  2316.                 writer_print_integers(w, "displaymatrix", sd->data, 9, " %11d", 3, 4, 1);
  2317.                 print_int("rotation", av_display_rotation_get((int32_t *)sd->data));
  2318.             }
  2319.             writer_print_section_footer(w);
  2320.         }
  2321.         writer_print_section_footer(w);
  2322.     }
  2323.  
  2324.     writer_print_section_footer(w);
  2325.     av_bprint_finalize(&pbuf, NULL);
  2326.     fflush(stdout);
  2327.  
  2328.     return ret;
  2329. }
  2330.  
  2331. static int show_streams(WriterContext *w, AVFormatContext *fmt_ctx)
  2332. {
  2333.     int i, ret = 0;
  2334.  
  2335.     writer_print_section_header(w, SECTION_ID_STREAMS);
  2336.     for (i = 0; i < fmt_ctx->nb_streams; i++)
  2337.         if (selected_streams[i]) {
  2338.             ret = show_stream(w, fmt_ctx, i, 0);
  2339.             if (ret < 0)
  2340.                 break;
  2341.         }
  2342.     writer_print_section_footer(w);
  2343.  
  2344.     return ret;
  2345. }
  2346.  
  2347. static int show_program(WriterContext *w, AVFormatContext *fmt_ctx, AVProgram *program)
  2348. {
  2349.     int i, ret = 0;
  2350.  
  2351.     writer_print_section_header(w, SECTION_ID_PROGRAM);
  2352.     print_int("program_id", program->id);
  2353.     print_int("program_num", program->program_num);
  2354.     print_int("nb_streams", program->nb_stream_indexes);
  2355.     print_int("pmt_pid", program->pmt_pid);
  2356.     print_int("pcr_pid", program->pcr_pid);
  2357.     print_ts("start_pts", program->start_time);
  2358.     print_time("start_time", program->start_time, &AV_TIME_BASE_Q);
  2359.     print_ts("end_pts", program->end_time);
  2360.     print_time("end_time", program->end_time, &AV_TIME_BASE_Q);
  2361.     if (do_show_program_tags)
  2362.         ret = show_tags(w, program->metadata, SECTION_ID_PROGRAM_TAGS);
  2363.     if (ret < 0)
  2364.         goto end;
  2365.  
  2366.     writer_print_section_header(w, SECTION_ID_PROGRAM_STREAMS);
  2367.     for (i = 0; i < program->nb_stream_indexes; i++) {
  2368.         if (selected_streams[program->stream_index[i]]) {
  2369.             ret = show_stream(w, fmt_ctx, program->stream_index[i], 1);
  2370.             if (ret < 0)
  2371.                 break;
  2372.         }
  2373.     }
  2374.     writer_print_section_footer(w);
  2375.  
  2376. end:
  2377.     writer_print_section_footer(w);
  2378.     return ret;
  2379. }
  2380.  
  2381. static int show_programs(WriterContext *w, AVFormatContext *fmt_ctx)
  2382. {
  2383.     int i, ret = 0;
  2384.  
  2385.     writer_print_section_header(w, SECTION_ID_PROGRAMS);
  2386.     for (i = 0; i < fmt_ctx->nb_programs; i++) {
  2387.         AVProgram *program = fmt_ctx->programs[i];
  2388.         if (!program)
  2389.             continue;
  2390.         ret = show_program(w, fmt_ctx, program);
  2391.         if (ret < 0)
  2392.             break;
  2393.     }
  2394.     writer_print_section_footer(w);
  2395.     return ret;
  2396. }
  2397.  
  2398. static int show_chapters(WriterContext *w, AVFormatContext *fmt_ctx)
  2399. {
  2400.     int i, ret = 0;
  2401.  
  2402.     writer_print_section_header(w, SECTION_ID_CHAPTERS);
  2403.     for (i = 0; i < fmt_ctx->nb_chapters; i++) {
  2404.         AVChapter *chapter = fmt_ctx->chapters[i];
  2405.  
  2406.         writer_print_section_header(w, SECTION_ID_CHAPTER);
  2407.         print_int("id", chapter->id);
  2408.         print_q  ("time_base", chapter->time_base, '/');
  2409.         print_int("start", chapter->start);
  2410.         print_time("start_time", chapter->start, &chapter->time_base);
  2411.         print_int("end", chapter->end);
  2412.         print_time("end_time", chapter->end, &chapter->time_base);
  2413.         if (do_show_chapter_tags)
  2414.             ret = show_tags(w, chapter->metadata, SECTION_ID_CHAPTER_TAGS);
  2415.         writer_print_section_footer(w);
  2416.     }
  2417.     writer_print_section_footer(w);
  2418.  
  2419.     return ret;
  2420. }
  2421.  
  2422. static int show_format(WriterContext *w, AVFormatContext *fmt_ctx)
  2423. {
  2424.     char val_str[128];
  2425.     int64_t size = fmt_ctx->pb ? avio_size(fmt_ctx->pb) : -1;
  2426.     int ret = 0;
  2427.  
  2428.     writer_print_section_header(w, SECTION_ID_FORMAT);
  2429.     print_str_validate("filename", fmt_ctx->filename);
  2430.     print_int("nb_streams",       fmt_ctx->nb_streams);
  2431.     print_int("nb_programs",      fmt_ctx->nb_programs);
  2432.     print_str("format_name",      fmt_ctx->iformat->name);
  2433.     if (!do_bitexact) {
  2434.         if (fmt_ctx->iformat->long_name) print_str    ("format_long_name", fmt_ctx->iformat->long_name);
  2435.         else                             print_str_opt("format_long_name", "unknown");
  2436.     }
  2437.     print_time("start_time",      fmt_ctx->start_time, &AV_TIME_BASE_Q);
  2438.     print_time("duration",        fmt_ctx->duration,   &AV_TIME_BASE_Q);
  2439.     if (size >= 0) print_val    ("size", size, unit_byte_str);
  2440.     else           print_str_opt("size", "N/A");
  2441.     if (fmt_ctx->bit_rate > 0) print_val    ("bit_rate", fmt_ctx->bit_rate, unit_bit_per_second_str);
  2442.     else                       print_str_opt("bit_rate", "N/A");
  2443.     print_int("probe_score", av_format_get_probe_score(fmt_ctx));
  2444.     if (do_show_format_tags)
  2445.         ret = show_tags(w, fmt_ctx->metadata, SECTION_ID_FORMAT_TAGS);
  2446.  
  2447.     writer_print_section_footer(w);
  2448.     fflush(stdout);
  2449.     return ret;
  2450. }
  2451.  
  2452. static void show_error(WriterContext *w, int err)
  2453. {
  2454.     char errbuf[128];
  2455.     const char *errbuf_ptr = errbuf;
  2456.  
  2457.     if (av_strerror(err, errbuf, sizeof(errbuf)) < 0)
  2458.         errbuf_ptr = strerror(AVUNERROR(err));
  2459.  
  2460.     writer_print_section_header(w, SECTION_ID_ERROR);
  2461.     print_int("code", err);
  2462.     print_str("string", errbuf_ptr);
  2463.     writer_print_section_footer(w);
  2464. }
  2465.  
  2466. static int open_input_file(AVFormatContext **fmt_ctx_ptr, const char *filename)
  2467. {
  2468.     int err, i, orig_nb_streams;
  2469.     AVFormatContext *fmt_ctx = NULL;
  2470.     AVDictionaryEntry *t;
  2471.     AVDictionary **opts;
  2472.     int scan_all_pmts_set = 0;
  2473.  
  2474.     if (!av_dict_get(format_opts, "scan_all_pmts", NULL, AV_DICT_MATCH_CASE)) {
  2475.         av_dict_set(&format_opts, "scan_all_pmts", "1", AV_DICT_DONT_OVERWRITE);
  2476.         scan_all_pmts_set = 1;
  2477.     }
  2478.     if ((err = avformat_open_input(&fmt_ctx, filename,
  2479.                                    iformat, &format_opts)) < 0) {
  2480.         print_error(filename, err);
  2481.         return err;
  2482.     }
  2483.     *fmt_ctx_ptr = fmt_ctx;
  2484.     if (scan_all_pmts_set)
  2485.         av_dict_set(&format_opts, "scan_all_pmts", NULL, AV_DICT_MATCH_CASE);
  2486.     if ((t = av_dict_get(format_opts, "", NULL, AV_DICT_IGNORE_SUFFIX))) {
  2487.         av_log(NULL, AV_LOG_ERROR, "Option %s not found.\n", t->key);
  2488.         return AVERROR_OPTION_NOT_FOUND;
  2489.     }
  2490.  
  2491.     /* fill the streams in the format context */
  2492.     opts = setup_find_stream_info_opts(fmt_ctx, codec_opts);
  2493.     orig_nb_streams = fmt_ctx->nb_streams;
  2494.  
  2495.     err = avformat_find_stream_info(fmt_ctx, opts);
  2496.  
  2497.     for (i = 0; i < orig_nb_streams; i++)
  2498.         av_dict_free(&opts[i]);
  2499.     av_freep(&opts);
  2500.  
  2501.     if (err < 0) {
  2502.         print_error(filename, err);
  2503.         return err;
  2504.     }
  2505.  
  2506.     av_dump_format(fmt_ctx, 0, filename, 0);
  2507.  
  2508.     /* bind a decoder to each input stream */
  2509.     for (i = 0; i < fmt_ctx->nb_streams; i++) {
  2510.         AVStream *stream = fmt_ctx->streams[i];
  2511.         AVCodec *codec;
  2512.  
  2513.         if (stream->codec->codec_id == AV_CODEC_ID_PROBE) {
  2514.             av_log(NULL, AV_LOG_WARNING,
  2515.                    "Failed to probe codec for input stream %d\n",
  2516.                     stream->index);
  2517.         } else if (!(codec = avcodec_find_decoder(stream->codec->codec_id))) {
  2518.             av_log(NULL, AV_LOG_WARNING,
  2519.                     "Unsupported codec with id %d for input stream %d\n",
  2520.                     stream->codec->codec_id, stream->index);
  2521.         } else {
  2522.             AVDictionary *opts = filter_codec_opts(codec_opts, stream->codec->codec_id,
  2523.                                                    fmt_ctx, stream, codec);
  2524.             if (avcodec_open2(stream->codec, codec, &opts) < 0) {
  2525.                 av_log(NULL, AV_LOG_WARNING, "Could not open codec for input stream %d\n",
  2526.                        stream->index);
  2527.             }
  2528.             if ((t = av_dict_get(opts, "", NULL, AV_DICT_IGNORE_SUFFIX))) {
  2529.                 av_log(NULL, AV_LOG_ERROR, "Option %s for input stream %d not found\n",
  2530.                        t->key, stream->index);
  2531.                 return AVERROR_OPTION_NOT_FOUND;
  2532.             }
  2533.         }
  2534.     }
  2535.  
  2536.     *fmt_ctx_ptr = fmt_ctx;
  2537.     return 0;
  2538. }
  2539.  
  2540. static void close_input_file(AVFormatContext **ctx_ptr)
  2541. {
  2542.     int i;
  2543.     AVFormatContext *fmt_ctx = *ctx_ptr;
  2544.  
  2545.     /* close decoder for each stream */
  2546.     for (i = 0; i < fmt_ctx->nb_streams; i++)
  2547.         if (fmt_ctx->streams[i]->codec->codec_id != AV_CODEC_ID_NONE)
  2548.             avcodec_close(fmt_ctx->streams[i]->codec);
  2549.  
  2550.     avformat_close_input(ctx_ptr);
  2551. }
  2552.  
  2553. static int probe_file(WriterContext *wctx, const char *filename)
  2554. {
  2555.     AVFormatContext *fmt_ctx = NULL;
  2556.     int ret, i;
  2557.     int section_id;
  2558.  
  2559.     do_read_frames = do_show_frames || do_count_frames;
  2560.     do_read_packets = do_show_packets || do_count_packets;
  2561.  
  2562.     ret = open_input_file(&fmt_ctx, filename);
  2563.     if (ret < 0)
  2564.         goto end;
  2565.  
  2566. #define CHECK_END if (ret < 0) goto end
  2567.  
  2568.     nb_streams = fmt_ctx->nb_streams;
  2569.     REALLOCZ_ARRAY_STREAM(nb_streams_frames,0,fmt_ctx->nb_streams);
  2570.     REALLOCZ_ARRAY_STREAM(nb_streams_packets,0,fmt_ctx->nb_streams);
  2571.     REALLOCZ_ARRAY_STREAM(selected_streams,0,fmt_ctx->nb_streams);
  2572.  
  2573.     for (i = 0; i < fmt_ctx->nb_streams; i++) {
  2574.         if (stream_specifier) {
  2575.             ret = avformat_match_stream_specifier(fmt_ctx,
  2576.                                                   fmt_ctx->streams[i],
  2577.                                                   stream_specifier);
  2578.             CHECK_END;
  2579.             else
  2580.                 selected_streams[i] = ret;
  2581.             ret = 0;
  2582.         } else {
  2583.             selected_streams[i] = 1;
  2584.         }
  2585.     }
  2586.  
  2587.     if (do_read_frames || do_read_packets) {
  2588.         if (do_show_frames && do_show_packets &&
  2589.             wctx->writer->flags & WRITER_FLAG_PUT_PACKETS_AND_FRAMES_IN_SAME_CHAPTER)
  2590.             section_id = SECTION_ID_PACKETS_AND_FRAMES;
  2591.         else if (do_show_packets && !do_show_frames)
  2592.             section_id = SECTION_ID_PACKETS;
  2593.         else // (!do_show_packets && do_show_frames)
  2594.             section_id = SECTION_ID_FRAMES;
  2595.         if (do_show_frames || do_show_packets)
  2596.             writer_print_section_header(wctx, section_id);
  2597.         ret = read_packets(wctx, fmt_ctx);
  2598.         if (do_show_frames || do_show_packets)
  2599.             writer_print_section_footer(wctx);
  2600.         CHECK_END;
  2601.     }
  2602.  
  2603.     if (do_show_programs) {
  2604.         ret = show_programs(wctx, fmt_ctx);
  2605.         CHECK_END;
  2606.     }
  2607.  
  2608.     if (do_show_streams) {
  2609.         ret = show_streams(wctx, fmt_ctx);
  2610.         CHECK_END;
  2611.     }
  2612.     if (do_show_chapters) {
  2613.         ret = show_chapters(wctx, fmt_ctx);
  2614.         CHECK_END;
  2615.     }
  2616.     if (do_show_format) {
  2617.         ret = show_format(wctx, fmt_ctx);
  2618.         CHECK_END;
  2619.     }
  2620.  
  2621. end:
  2622.     if (fmt_ctx)
  2623.         close_input_file(&fmt_ctx);
  2624.     av_freep(&nb_streams_frames);
  2625.     av_freep(&nb_streams_packets);
  2626.     av_freep(&selected_streams);
  2627.  
  2628.     return ret;
  2629. }
  2630.  
  2631. static void show_usage(void)
  2632. {
  2633.     av_log(NULL, AV_LOG_INFO, "Simple multimedia streams analyzer\n");
  2634.     av_log(NULL, AV_LOG_INFO, "usage: %s [OPTIONS] [INPUT_FILE]\n", program_name);
  2635.     av_log(NULL, AV_LOG_INFO, "\n");
  2636. }
  2637.  
  2638. static void ffprobe_show_program_version(WriterContext *w)
  2639. {
  2640.     AVBPrint pbuf;
  2641.     av_bprint_init(&pbuf, 1, AV_BPRINT_SIZE_UNLIMITED);
  2642.  
  2643.     writer_print_section_header(w, SECTION_ID_PROGRAM_VERSION);
  2644.     print_str("version", FFMPEG_VERSION);
  2645.     print_fmt("copyright", "Copyright (c) %d-%d the FFmpeg developers",
  2646.               program_birth_year, CONFIG_THIS_YEAR);
  2647.     print_str("compiler_ident", CC_IDENT);
  2648.     print_str("configuration", FFMPEG_CONFIGURATION);
  2649.     writer_print_section_footer(w);
  2650.  
  2651.     av_bprint_finalize(&pbuf, NULL);
  2652. }
  2653.  
  2654. #define SHOW_LIB_VERSION(libname, LIBNAME)                              \
  2655.     do {                                                                \
  2656.         if (CONFIG_##LIBNAME) {                                         \
  2657.             unsigned int version = libname##_version();                 \
  2658.             writer_print_section_header(w, SECTION_ID_LIBRARY_VERSION); \
  2659.             print_str("name",    "lib" #libname);                       \
  2660.             print_int("major",   LIB##LIBNAME##_VERSION_MAJOR);         \
  2661.             print_int("minor",   LIB##LIBNAME##_VERSION_MINOR);         \
  2662.             print_int("micro",   LIB##LIBNAME##_VERSION_MICRO);         \
  2663.             print_int("version", version);                              \
  2664.             print_str("ident",   LIB##LIBNAME##_IDENT);                 \
  2665.             writer_print_section_footer(w);                             \
  2666.         }                                                               \
  2667.     } while (0)
  2668.  
  2669. static void ffprobe_show_library_versions(WriterContext *w)
  2670. {
  2671.     writer_print_section_header(w, SECTION_ID_LIBRARY_VERSIONS);
  2672.     SHOW_LIB_VERSION(avutil,     AVUTIL);
  2673.     SHOW_LIB_VERSION(avcodec,    AVCODEC);
  2674.     SHOW_LIB_VERSION(avformat,   AVFORMAT);
  2675.     SHOW_LIB_VERSION(avdevice,   AVDEVICE);
  2676.     SHOW_LIB_VERSION(avfilter,   AVFILTER);
  2677.     SHOW_LIB_VERSION(swscale,    SWSCALE);
  2678.     SHOW_LIB_VERSION(swresample, SWRESAMPLE);
  2679.     SHOW_LIB_VERSION(postproc,   POSTPROC);
  2680.     writer_print_section_footer(w);
  2681. }
  2682.  
  2683. #define PRINT_PIX_FMT_FLAG(flagname, name)                                \
  2684.     do {                                                                  \
  2685.         print_int(name, !!(pixdesc->flags & AV_PIX_FMT_FLAG_##flagname)); \
  2686.     } while (0)
  2687.  
  2688. static void ffprobe_show_pixel_formats(WriterContext *w)
  2689. {
  2690.     const AVPixFmtDescriptor *pixdesc = NULL;
  2691.     int i, n;
  2692.  
  2693.     writer_print_section_header(w, SECTION_ID_PIXEL_FORMATS);
  2694.     while (pixdesc = av_pix_fmt_desc_next(pixdesc)) {
  2695.         writer_print_section_header(w, SECTION_ID_PIXEL_FORMAT);
  2696.         print_str("name", pixdesc->name);
  2697.         print_int("nb_components", pixdesc->nb_components);
  2698.         if ((pixdesc->nb_components >= 3) && !(pixdesc->flags & AV_PIX_FMT_FLAG_RGB)) {
  2699.             print_int    ("log2_chroma_w", pixdesc->log2_chroma_w);
  2700.             print_int    ("log2_chroma_h", pixdesc->log2_chroma_h);
  2701.         } else {
  2702.             print_str_opt("log2_chroma_w", "N/A");
  2703.             print_str_opt("log2_chroma_h", "N/A");
  2704.         }
  2705.         n = av_get_bits_per_pixel(pixdesc);
  2706.         if (n) print_int    ("bits_per_pixel", n);
  2707.         else   print_str_opt("bits_per_pixel", "N/A");
  2708.         if (do_show_pixel_format_flags) {
  2709.             writer_print_section_header(w, SECTION_ID_PIXEL_FORMAT_FLAGS);
  2710.             PRINT_PIX_FMT_FLAG(BE,        "big_endian");
  2711.             PRINT_PIX_FMT_FLAG(PAL,       "palette");
  2712.             PRINT_PIX_FMT_FLAG(BITSTREAM, "bitstream");
  2713.             PRINT_PIX_FMT_FLAG(HWACCEL,   "hwaccel");
  2714.             PRINT_PIX_FMT_FLAG(PLANAR,    "planar");
  2715.             PRINT_PIX_FMT_FLAG(RGB,       "rgb");
  2716.             PRINT_PIX_FMT_FLAG(PSEUDOPAL, "pseudopal");
  2717.             PRINT_PIX_FMT_FLAG(ALPHA,     "alpha");
  2718.             writer_print_section_footer(w);
  2719.         }
  2720.         if (do_show_pixel_format_components && (pixdesc->nb_components > 0)) {
  2721.             writer_print_section_header(w, SECTION_ID_PIXEL_FORMAT_COMPONENTS);
  2722.             for (i = 0; i < pixdesc->nb_components; i++) {
  2723.                 writer_print_section_header(w, SECTION_ID_PIXEL_FORMAT_COMPONENT);
  2724.                 print_int("index", i + 1);
  2725.                 print_int("bit_depth", pixdesc->comp[i].depth_minus1 + 1);
  2726.                 writer_print_section_footer(w);
  2727.             }
  2728.             writer_print_section_footer(w);
  2729.         }
  2730.         writer_print_section_footer(w);
  2731.     }
  2732.     writer_print_section_footer(w);
  2733. }
  2734.  
  2735. static int opt_format(void *optctx, const char *opt, const char *arg)
  2736. {
  2737.     iformat = av_find_input_format(arg);
  2738.     if (!iformat) {
  2739.         av_log(NULL, AV_LOG_ERROR, "Unknown input format: %s\n", arg);
  2740.         return AVERROR(EINVAL);
  2741.     }
  2742.     return 0;
  2743. }
  2744.  
  2745. static inline void mark_section_show_entries(SectionID section_id,
  2746.                                              int show_all_entries, AVDictionary *entries)
  2747. {
  2748.     struct section *section = &sections[section_id];
  2749.  
  2750.     section->show_all_entries = show_all_entries;
  2751.     if (show_all_entries) {
  2752.         SectionID *id;
  2753.         for (id = section->children_ids; *id != -1; id++)
  2754.             mark_section_show_entries(*id, show_all_entries, entries);
  2755.     } else {
  2756.         av_dict_copy(&section->entries_to_show, entries, 0);
  2757.     }
  2758. }
  2759.  
  2760. static int match_section(const char *section_name,
  2761.                          int show_all_entries, AVDictionary *entries)
  2762. {
  2763.     int i, ret = 0;
  2764.  
  2765.     for (i = 0; i < FF_ARRAY_ELEMS(sections); i++) {
  2766.         const struct section *section = &sections[i];
  2767.         if (!strcmp(section_name, section->name) ||
  2768.             (section->unique_name && !strcmp(section_name, section->unique_name))) {
  2769.             av_log(NULL, AV_LOG_DEBUG,
  2770.                    "'%s' matches section with unique name '%s'\n", section_name,
  2771.                    (char *)av_x_if_null(section->unique_name, section->name));
  2772.             ret++;
  2773.             mark_section_show_entries(section->id, show_all_entries, entries);
  2774.         }
  2775.     }
  2776.     return ret;
  2777. }
  2778.  
  2779. static int opt_show_entries(void *optctx, const char *opt, const char *arg)
  2780. {
  2781.     const char *p = arg;
  2782.     int ret = 0;
  2783.  
  2784.     while (*p) {
  2785.         AVDictionary *entries = NULL;
  2786.         char *section_name = av_get_token(&p, "=:");
  2787.         int show_all_entries = 0;
  2788.  
  2789.         if (!section_name) {
  2790.             av_log(NULL, AV_LOG_ERROR,
  2791.                    "Missing section name for option '%s'\n", opt);
  2792.             return AVERROR(EINVAL);
  2793.         }
  2794.  
  2795.         if (*p == '=') {
  2796.             p++;
  2797.             while (*p && *p != ':') {
  2798.                 char *entry = av_get_token(&p, ",:");
  2799.                 if (!entry)
  2800.                     break;
  2801.                 av_log(NULL, AV_LOG_VERBOSE,
  2802.                        "Adding '%s' to the entries to show in section '%s'\n",
  2803.                        entry, section_name);
  2804.                 av_dict_set(&entries, entry, "", AV_DICT_DONT_STRDUP_KEY);
  2805.                 if (*p == ',')
  2806.                     p++;
  2807.             }
  2808.         } else {
  2809.             show_all_entries = 1;
  2810.         }
  2811.  
  2812.         ret = match_section(section_name, show_all_entries, entries);
  2813.         if (ret == 0) {
  2814.             av_log(NULL, AV_LOG_ERROR, "No match for section '%s'\n", section_name);
  2815.             ret = AVERROR(EINVAL);
  2816.         }
  2817.         av_dict_free(&entries);
  2818.         av_free(section_name);
  2819.  
  2820.         if (ret <= 0)
  2821.             break;
  2822.         if (*p)
  2823.             p++;
  2824.     }
  2825.  
  2826.     return ret;
  2827. }
  2828.  
  2829. static int opt_show_format_entry(void *optctx, const char *opt, const char *arg)
  2830. {
  2831.     char *buf = av_asprintf("format=%s", arg);
  2832.     int ret;
  2833.  
  2834.     if (!buf)
  2835.         return AVERROR(ENOMEM);
  2836.  
  2837.     av_log(NULL, AV_LOG_WARNING,
  2838.            "Option '%s' is deprecated, use '-show_entries format=%s' instead\n",
  2839.            opt, arg);
  2840.     ret = opt_show_entries(optctx, opt, buf);
  2841.     av_free(buf);
  2842.     return ret;
  2843. }
  2844.  
  2845. static void opt_input_file(void *optctx, const char *arg)
  2846. {
  2847.     if (input_filename) {
  2848.         av_log(NULL, AV_LOG_ERROR,
  2849.                 "Argument '%s' provided as input filename, but '%s' was already specified.\n",
  2850.                 arg, input_filename);
  2851.         exit_program(1);
  2852.     }
  2853.     if (!strcmp(arg, "-"))
  2854.         arg = "pipe:";
  2855.     input_filename = arg;
  2856. }
  2857.  
  2858. static int opt_input_file_i(void *optctx, const char *opt, const char *arg)
  2859. {
  2860.     opt_input_file(optctx, arg);
  2861.     return 0;
  2862. }
  2863.  
  2864. void show_help_default(const char *opt, const char *arg)
  2865. {
  2866.     av_log_set_callback(log_callback_help);
  2867.     show_usage();
  2868.     show_help_options(options, "Main options:", 0, 0, 0);
  2869.     printf("\n");
  2870.  
  2871.     show_help_children(avformat_get_class(), AV_OPT_FLAG_DECODING_PARAM);
  2872. }
  2873.  
  2874. /**
  2875.  * Parse interval specification, according to the format:
  2876.  * INTERVAL ::= [START|+START_OFFSET][%[END|+END_OFFSET]]
  2877.  * INTERVALS ::= INTERVAL[,INTERVALS]
  2878. */
  2879. static int parse_read_interval(const char *interval_spec,
  2880.                                ReadInterval *interval)
  2881. {
  2882.     int ret = 0;
  2883.     char *next, *p, *spec = av_strdup(interval_spec);
  2884.     if (!spec)
  2885.         return AVERROR(ENOMEM);
  2886.  
  2887.     if (!*spec) {
  2888.         av_log(NULL, AV_LOG_ERROR, "Invalid empty interval specification\n");
  2889.         ret = AVERROR(EINVAL);
  2890.         goto end;
  2891.     }
  2892.  
  2893.     p = spec;
  2894.     next = strchr(spec, '%');
  2895.     if (next)
  2896.         *next++ = 0;
  2897.  
  2898.     /* parse first part */
  2899.     if (*p) {
  2900.         interval->has_start = 1;
  2901.  
  2902.         if (*p == '+') {
  2903.             interval->start_is_offset = 1;
  2904.             p++;
  2905.         } else {
  2906.             interval->start_is_offset = 0;
  2907.         }
  2908.  
  2909.         ret = av_parse_time(&interval->start, p, 1);
  2910.         if (ret < 0) {
  2911.             av_log(NULL, AV_LOG_ERROR, "Invalid interval start specification '%s'\n", p);
  2912.             goto end;
  2913.         }
  2914.     } else {
  2915.         interval->has_start = 0;
  2916.     }
  2917.  
  2918.     /* parse second part */
  2919.     p = next;
  2920.     if (p && *p) {
  2921.         int64_t us;
  2922.         interval->has_end = 1;
  2923.  
  2924.         if (*p == '+') {
  2925.             interval->end_is_offset = 1;
  2926.             p++;
  2927.         } else {
  2928.             interval->end_is_offset = 0;
  2929.         }
  2930.  
  2931.         if (interval->end_is_offset && *p == '#') {
  2932.             long long int lli;
  2933.             char *tail;
  2934.             interval->duration_frames = 1;
  2935.             p++;
  2936.             lli = strtoll(p, &tail, 10);
  2937.             if (*tail || lli < 0) {
  2938.                 av_log(NULL, AV_LOG_ERROR,
  2939.                        "Invalid or negative value '%s' for duration number of frames\n", p);
  2940.                 goto end;
  2941.             }
  2942.             interval->end = lli;
  2943.         } else {
  2944.             ret = av_parse_time(&us, p, 1);
  2945.             if (ret < 0) {
  2946.                 av_log(NULL, AV_LOG_ERROR, "Invalid interval end/duration specification '%s'\n", p);
  2947.                 goto end;
  2948.             }
  2949.             interval->end = us;
  2950.         }
  2951.     } else {
  2952.         interval->has_end = 0;
  2953.     }
  2954.  
  2955. end:
  2956.     av_free(spec);
  2957.     return ret;
  2958. }
  2959.  
  2960. static int parse_read_intervals(const char *intervals_spec)
  2961. {
  2962.     int ret, n, i;
  2963.     char *p, *spec = av_strdup(intervals_spec);
  2964.     if (!spec)
  2965.         return AVERROR(ENOMEM);
  2966.  
  2967.     /* preparse specification, get number of intervals */
  2968.     for (n = 0, p = spec; *p; p++)
  2969.         if (*p == ',')
  2970.             n++;
  2971.     n++;
  2972.  
  2973.     read_intervals = av_malloc_array(n, sizeof(*read_intervals));
  2974.     if (!read_intervals) {
  2975.         ret = AVERROR(ENOMEM);
  2976.         goto end;
  2977.     }
  2978.     read_intervals_nb = n;
  2979.  
  2980.     /* parse intervals */
  2981.     p = spec;
  2982.     for (i = 0; p; i++) {
  2983.         char *next;
  2984.  
  2985.         av_assert0(i < read_intervals_nb);
  2986.         next = strchr(p, ',');
  2987.         if (next)
  2988.             *next++ = 0;
  2989.  
  2990.         read_intervals[i].id = i;
  2991.         ret = parse_read_interval(p, &read_intervals[i]);
  2992.         if (ret < 0) {
  2993.             av_log(NULL, AV_LOG_ERROR, "Error parsing read interval #%d '%s'\n",
  2994.                    i, p);
  2995.             goto end;
  2996.         }
  2997.         av_log(NULL, AV_LOG_VERBOSE, "Parsed log interval ");
  2998.         log_read_interval(&read_intervals[i], NULL, AV_LOG_VERBOSE);
  2999.         p = next;
  3000.     }
  3001.     av_assert0(i == read_intervals_nb);
  3002.  
  3003. end:
  3004.     av_free(spec);
  3005.     return ret;
  3006. }
  3007.  
  3008. static int opt_read_intervals(void *optctx, const char *opt, const char *arg)
  3009. {
  3010.     return parse_read_intervals(arg);
  3011. }
  3012.  
  3013. static int opt_pretty(void *optctx, const char *opt, const char *arg)
  3014. {
  3015.     show_value_unit              = 1;
  3016.     use_value_prefix             = 1;
  3017.     use_byte_value_binary_prefix = 1;
  3018.     use_value_sexagesimal_format = 1;
  3019.     return 0;
  3020. }
  3021.  
  3022. static void print_section(SectionID id, int level)
  3023. {
  3024.     const SectionID *pid;
  3025.     const struct section *section = &sections[id];
  3026.     printf("%c%c%c",
  3027.            section->flags & SECTION_FLAG_IS_WRAPPER           ? 'W' : '.',
  3028.            section->flags & SECTION_FLAG_IS_ARRAY             ? 'A' : '.',
  3029.            section->flags & SECTION_FLAG_HAS_VARIABLE_FIELDS  ? 'V' : '.');
  3030.     printf("%*c  %s", level * 4, ' ', section->name);
  3031.     if (section->unique_name)
  3032.         printf("/%s", section->unique_name);
  3033.     printf("\n");
  3034.  
  3035.     for (pid = section->children_ids; *pid != -1; pid++)
  3036.         print_section(*pid, level+1);
  3037. }
  3038.  
  3039. static int opt_sections(void *optctx, const char *opt, const char *arg)
  3040. {
  3041.     printf("Sections:\n"
  3042.            "W.. = Section is a wrapper (contains other sections, no local entries)\n"
  3043.            ".A. = Section contains an array of elements of the same type\n"
  3044.            "..V = Section may contain a variable number of fields with variable keys\n"
  3045.            "FLAGS NAME/UNIQUE_NAME\n"
  3046.            "---\n");
  3047.     print_section(SECTION_ID_ROOT, 0);
  3048.     return 0;
  3049. }
  3050.  
  3051. static int opt_show_versions(const char *opt, const char *arg)
  3052. {
  3053.     mark_section_show_entries(SECTION_ID_PROGRAM_VERSION, 1, NULL);
  3054.     mark_section_show_entries(SECTION_ID_LIBRARY_VERSION, 1, NULL);
  3055.     return 0;
  3056. }
  3057.  
  3058. #define DEFINE_OPT_SHOW_SECTION(section, target_section_id)             \
  3059.     static int opt_show_##section(const char *opt, const char *arg)     \
  3060.     {                                                                   \
  3061.         mark_section_show_entries(SECTION_ID_##target_section_id, 1, NULL); \
  3062.         return 0;                                                       \
  3063.     }
  3064.  
  3065. DEFINE_OPT_SHOW_SECTION(chapters,         CHAPTERS);
  3066. DEFINE_OPT_SHOW_SECTION(error,            ERROR);
  3067. DEFINE_OPT_SHOW_SECTION(format,           FORMAT);
  3068. DEFINE_OPT_SHOW_SECTION(frames,           FRAMES);
  3069. DEFINE_OPT_SHOW_SECTION(library_versions, LIBRARY_VERSIONS);
  3070. DEFINE_OPT_SHOW_SECTION(packets,          PACKETS);
  3071. DEFINE_OPT_SHOW_SECTION(pixel_formats,    PIXEL_FORMATS);
  3072. DEFINE_OPT_SHOW_SECTION(program_version,  PROGRAM_VERSION);
  3073. DEFINE_OPT_SHOW_SECTION(streams,          STREAMS);
  3074. DEFINE_OPT_SHOW_SECTION(programs,         PROGRAMS);
  3075.  
  3076. static const OptionDef real_options[] = {
  3077. #include "cmdutils_common_opts.h"
  3078.     { "f", HAS_ARG, {.func_arg = opt_format}, "force format", "format" },
  3079.     { "unit", OPT_BOOL, {&show_value_unit}, "show unit of the displayed values" },
  3080.     { "prefix", OPT_BOOL, {&use_value_prefix}, "use SI prefixes for the displayed values" },
  3081.     { "byte_binary_prefix", OPT_BOOL, {&use_byte_value_binary_prefix},
  3082.       "use binary prefixes for byte units" },
  3083.     { "sexagesimal", OPT_BOOL,  {&use_value_sexagesimal_format},
  3084.       "use sexagesimal format HOURS:MM:SS.MICROSECONDS for time units" },
  3085.     { "pretty", 0, {.func_arg = opt_pretty},
  3086.       "prettify the format of displayed values, make it more human readable" },
  3087.     { "print_format", OPT_STRING | HAS_ARG, {(void*)&print_format},
  3088.       "set the output printing format (available formats are: default, compact, csv, flat, ini, json, xml)", "format" },
  3089.     { "of", OPT_STRING | HAS_ARG, {(void*)&print_format}, "alias for -print_format", "format" },
  3090.     { "select_streams", OPT_STRING | HAS_ARG, {(void*)&stream_specifier}, "select the specified streams", "stream_specifier" },
  3091.     { "sections", OPT_EXIT, {.func_arg = opt_sections}, "print sections structure and section information, and exit" },
  3092.     { "show_data",    OPT_BOOL, {(void*)&do_show_data}, "show packets data" },
  3093.     { "show_data_hash", OPT_STRING | HAS_ARG, {(void*)&show_data_hash}, "show packets data hash" },
  3094.     { "show_error",   0, {(void*)&opt_show_error},  "show probing error" },
  3095.     { "show_format",  0, {(void*)&opt_show_format}, "show format/container info" },
  3096.     { "show_frames",  0, {(void*)&opt_show_frames}, "show frames info" },
  3097.     { "show_format_entry", HAS_ARG, {.func_arg = opt_show_format_entry},
  3098.       "show a particular entry from the format/container info", "entry" },
  3099.     { "show_entries", HAS_ARG, {.func_arg = opt_show_entries},
  3100.       "show a set of specified entries", "entry_list" },
  3101.     { "show_packets", 0, {(void*)&opt_show_packets}, "show packets info" },
  3102.     { "show_programs", 0, {(void*)&opt_show_programs}, "show programs info" },
  3103.     { "show_streams", 0, {(void*)&opt_show_streams}, "show streams info" },
  3104.     { "show_chapters", 0, {(void*)&opt_show_chapters}, "show chapters info" },
  3105.     { "count_frames", OPT_BOOL, {(void*)&do_count_frames}, "count the number of frames per stream" },
  3106.     { "count_packets", OPT_BOOL, {(void*)&do_count_packets}, "count the number of packets per stream" },
  3107.     { "show_program_version",  0, {(void*)&opt_show_program_version},  "show ffprobe version" },
  3108.     { "show_library_versions", 0, {(void*)&opt_show_library_versions}, "show library versions" },
  3109.     { "show_versions",         0, {(void*)&opt_show_versions}, "show program and library versions" },
  3110.     { "show_pixel_formats", 0, {(void*)&opt_show_pixel_formats}, "show pixel format descriptions" },
  3111.     { "show_private_data", OPT_BOOL, {(void*)&show_private_data}, "show private data" },
  3112.     { "private",           OPT_BOOL, {(void*)&show_private_data}, "same as show_private_data" },
  3113.     { "bitexact", OPT_BOOL, {&do_bitexact}, "force bitexact output" },
  3114.     { "read_intervals", HAS_ARG, {.func_arg = opt_read_intervals}, "set read intervals", "read_intervals" },
  3115.     { "default", HAS_ARG | OPT_AUDIO | OPT_VIDEO | OPT_EXPERT, {.func_arg = opt_default}, "generic catch all option", "" },
  3116.     { "i", HAS_ARG, {.func_arg = opt_input_file_i}, "read specified file", "input_file"},
  3117.     { NULL, },
  3118. };
  3119.  
  3120. static inline int check_section_show_entries(int section_id)
  3121. {
  3122.     int *id;
  3123.     struct section *section = &sections[section_id];
  3124.     if (sections[section_id].show_all_entries || sections[section_id].entries_to_show)
  3125.         return 1;
  3126.     for (id = section->children_ids; *id != -1; id++)
  3127.         if (check_section_show_entries(*id))
  3128.             return 1;
  3129.     return 0;
  3130. }
  3131.  
  3132. #define SET_DO_SHOW(id, varname) do {                                   \
  3133.         if (check_section_show_entries(SECTION_ID_##id))                \
  3134.             do_show_##varname = 1;                                      \
  3135.     } while (0)
  3136.  
  3137. int main(int argc, char **argv)
  3138. {
  3139.     const Writer *w;
  3140.     WriterContext *wctx;
  3141.     char *buf;
  3142.     char *w_name = NULL, *w_args = NULL;
  3143.     int ret, i;
  3144.  
  3145.     av_log_set_flags(AV_LOG_SKIP_REPEATED);
  3146.     register_exit(ffprobe_cleanup);
  3147.  
  3148.     options = real_options;
  3149.     parse_loglevel(argc, argv, options);
  3150.     av_register_all();
  3151.     avformat_network_init();
  3152.     init_opts();
  3153. #if CONFIG_AVDEVICE
  3154.     avdevice_register_all();
  3155. #endif
  3156.  
  3157.     show_banner(argc, argv, options);
  3158.     parse_options(NULL, argc, argv, options, opt_input_file);
  3159.  
  3160.     /* mark things to show, based on -show_entries */
  3161.     SET_DO_SHOW(CHAPTERS, chapters);
  3162.     SET_DO_SHOW(ERROR, error);
  3163.     SET_DO_SHOW(FORMAT, format);
  3164.     SET_DO_SHOW(FRAMES, frames);
  3165.     SET_DO_SHOW(LIBRARY_VERSIONS, library_versions);
  3166.     SET_DO_SHOW(PACKETS, packets);
  3167.     SET_DO_SHOW(PIXEL_FORMATS, pixel_formats);
  3168.     SET_DO_SHOW(PIXEL_FORMAT_FLAGS, pixel_format_flags);
  3169.     SET_DO_SHOW(PIXEL_FORMAT_COMPONENTS, pixel_format_components);
  3170.     SET_DO_SHOW(PROGRAM_VERSION, program_version);
  3171.     SET_DO_SHOW(PROGRAMS, programs);
  3172.     SET_DO_SHOW(STREAMS, streams);
  3173.     SET_DO_SHOW(STREAM_DISPOSITION, stream_disposition);
  3174.     SET_DO_SHOW(PROGRAM_STREAM_DISPOSITION, stream_disposition);
  3175.  
  3176.     SET_DO_SHOW(CHAPTER_TAGS, chapter_tags);
  3177.     SET_DO_SHOW(FORMAT_TAGS, format_tags);
  3178.     SET_DO_SHOW(FRAME_TAGS, frame_tags);
  3179.     SET_DO_SHOW(PROGRAM_TAGS, program_tags);
  3180.     SET_DO_SHOW(STREAM_TAGS, stream_tags);
  3181.  
  3182.     if (do_bitexact && (do_show_program_version || do_show_library_versions)) {
  3183.         av_log(NULL, AV_LOG_ERROR,
  3184.                "-bitexact and -show_program_version or -show_library_versions "
  3185.                "options are incompatible\n");
  3186.         ret = AVERROR(EINVAL);
  3187.         goto end;
  3188.     }
  3189.  
  3190.     writer_register_all();
  3191.  
  3192.     if (!print_format)
  3193.         print_format = av_strdup("default");
  3194.     if (!print_format) {
  3195.         ret = AVERROR(ENOMEM);
  3196.         goto end;
  3197.     }
  3198.     w_name = av_strtok(print_format, "=", &buf);
  3199.     w_args = buf;
  3200.  
  3201.     if (show_data_hash) {
  3202.         if ((ret = av_hash_alloc(&hash, show_data_hash)) < 0) {
  3203.             if (ret == AVERROR(EINVAL)) {
  3204.                 const char *n;
  3205.                 av_log(NULL, AV_LOG_ERROR,
  3206.                        "Unknown hash algorithm '%s'\nKnown algorithms:",
  3207.                        show_data_hash);
  3208.                 for (i = 0; (n = av_hash_names(i)); i++)
  3209.                     av_log(NULL, AV_LOG_ERROR, " %s", n);
  3210.                 av_log(NULL, AV_LOG_ERROR, "\n");
  3211.             }
  3212.             goto end;
  3213.         }
  3214.     }
  3215.  
  3216.     w = writer_get_by_name(w_name);
  3217.     if (!w) {
  3218.         av_log(NULL, AV_LOG_ERROR, "Unknown output format with name '%s'\n", w_name);
  3219.         ret = AVERROR(EINVAL);
  3220.         goto end;
  3221.     }
  3222.  
  3223.     if ((ret = writer_open(&wctx, w, w_args,
  3224.                            sections, FF_ARRAY_ELEMS(sections))) >= 0) {
  3225.         if (w == &xml_writer)
  3226.             wctx->string_validation_utf8_flags |= AV_UTF8_FLAG_EXCLUDE_XML_INVALID_CONTROL_CODES;
  3227.  
  3228.         writer_print_section_header(wctx, SECTION_ID_ROOT);
  3229.  
  3230.         if (do_show_program_version)
  3231.             ffprobe_show_program_version(wctx);
  3232.         if (do_show_library_versions)
  3233.             ffprobe_show_library_versions(wctx);
  3234.         if (do_show_pixel_formats)
  3235.             ffprobe_show_pixel_formats(wctx);
  3236.  
  3237.         if (!input_filename &&
  3238.             ((do_show_format || do_show_programs || do_show_streams || do_show_chapters || do_show_packets || do_show_error) ||
  3239.              (!do_show_program_version && !do_show_library_versions && !do_show_pixel_formats))) {
  3240.             show_usage();
  3241.             av_log(NULL, AV_LOG_ERROR, "You have to specify one input file.\n");
  3242.             av_log(NULL, AV_LOG_ERROR, "Use -h to get full help or, even better, run 'man %s'.\n", program_name);
  3243.             ret = AVERROR(EINVAL);
  3244.         } else if (input_filename) {
  3245.             ret = probe_file(wctx, input_filename);
  3246.             if (ret < 0 && do_show_error)
  3247.                 show_error(wctx, ret);
  3248.         }
  3249.  
  3250.         writer_print_section_footer(wctx);
  3251.         writer_close(&wctx);
  3252.     }
  3253.  
  3254. end:
  3255.     av_freep(&print_format);
  3256.     av_freep(&read_intervals);
  3257.     av_hash_freep(&hash);
  3258.  
  3259.     uninit_opts();
  3260.     for (i = 0; i < FF_ARRAY_ELEMS(sections); i++)
  3261.         av_dict_free(&(sections[i].entries_to_show));
  3262.  
  3263.     avformat_network_deinit();
  3264.  
  3265.     return ret < 0;
  3266. }
  3267.