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  1. /*
  2.  * Image format
  3.  * Copyright (c) 2000, 2001, 2002 Fabrice Bellard
  4.  * Copyright (c) 2004 Michael Niedermayer
  5.  *
  6.  * This file is part of FFmpeg.
  7.  *
  8.  * FFmpeg is free software; you can redistribute it and/or
  9.  * modify it under the terms of the GNU Lesser General Public
  10.  * License as published by the Free Software Foundation; either
  11.  * version 2.1 of the License, or (at your option) any later version.
  12.  *
  13.  * FFmpeg is distributed in the hope that it will be useful,
  14.  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  15.  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  16.  * Lesser General Public License for more details.
  17.  *
  18.  * You should have received a copy of the GNU Lesser General Public
  19.  * License along with FFmpeg; if not, write to the Free Software
  20.  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
  21.  */
  22.  
  23. #include <sys/stat.h>
  24. #include "libavutil/avstring.h"
  25. #include "libavutil/log.h"
  26. #include "libavutil/opt.h"
  27. #include "libavutil/pixdesc.h"
  28. #include "libavutil/parseutils.h"
  29. #include "avformat.h"
  30. #include "internal.h"
  31. #if HAVE_GLOB
  32. #include <glob.h>
  33.  
  34. /* Locally define as 0 (bitwise-OR no-op) any missing glob options that
  35.    are non-posix glibc/bsd extensions. */
  36. #ifndef GLOB_NOMAGIC
  37. #define GLOB_NOMAGIC 0
  38. #endif
  39. #ifndef GLOB_BRACE
  40. #define GLOB_BRACE 0
  41. #endif
  42.  
  43. #endif /* HAVE_GLOB */
  44.  
  45. typedef struct {
  46.     const AVClass *class;  /**< Class for private options. */
  47.     int img_first;
  48.     int img_last;
  49.     int img_number;
  50.     int64_t pts;
  51.     int img_count;
  52.     int is_pipe;
  53.     int split_planes;       /**< use independent file for each Y, U, V plane */
  54.     char path[1024];
  55.     char *pixel_format;     /**< Set by a private option. */
  56.     int width, height;      /**< Set by a private option. */
  57.     AVRational framerate;   /**< Set by a private option. */
  58.     int loop;
  59.     enum { PT_GLOB_SEQUENCE, PT_GLOB, PT_SEQUENCE } pattern_type;
  60.     int use_glob;
  61. #if HAVE_GLOB
  62.     glob_t globstate;
  63. #endif
  64.     int start_number;
  65.     int start_number_range;
  66.     int frame_size;
  67.     int ts_from_file;
  68. } VideoDemuxData;
  69.  
  70. static const int sizes[][2] = {
  71.     { 640, 480 },
  72.     { 720, 480 },
  73.     { 720, 576 },
  74.     { 352, 288 },
  75.     { 352, 240 },
  76.     { 160, 128 },
  77.     { 512, 384 },
  78.     { 640, 352 },
  79.     { 640, 240 },
  80. };
  81.  
  82. static int infer_size(int *width_ptr, int *height_ptr, int size)
  83. {
  84.     int i;
  85.  
  86.     for (i = 0; i < FF_ARRAY_ELEMS(sizes); i++) {
  87.         if ((sizes[i][0] * sizes[i][1]) == size) {
  88.             *width_ptr  = sizes[i][0];
  89.             *height_ptr = sizes[i][1];
  90.             return 0;
  91.         }
  92.     }
  93.  
  94.     return -1;
  95. }
  96.  
  97. static int is_glob(const char *path)
  98. {
  99. #if HAVE_GLOB
  100.     size_t span = 0;
  101.     const char *p = path;
  102.  
  103.     while (p = strchr(p, '%')) {
  104.         if (*(++p) == '%') {
  105.             ++p;
  106.             continue;
  107.         }
  108.         if (span = strspn(p, "*?[]{}"))
  109.             break;
  110.     }
  111.     /* Did we hit a glob char or get to the end? */
  112.     return span != 0;
  113. #else
  114.     return 0;
  115. #endif
  116. }
  117.  
  118. /**
  119.  * Get index range of image files matched by path.
  120.  *
  121.  * @param pfirst_index pointer to index updated with the first number in the range
  122.  * @param plast_index  pointer to index updated with the last number in the range
  123.  * @param path         path which has to be matched by the image files in the range
  124.  * @param start_index  minimum accepted value for the first index in the range
  125.  * @return -1 if no image file could be found
  126.  */
  127. static int find_image_range(int *pfirst_index, int *plast_index,
  128.                             const char *path, int start_index, int start_index_range)
  129. {
  130.     char buf[1024];
  131.     int range, last_index, range1, first_index;
  132.  
  133.     /* find the first image */
  134.     for (first_index = start_index; first_index < start_index + start_index_range; first_index++) {
  135.         if (av_get_frame_filename(buf, sizeof(buf), path, first_index) < 0) {
  136.             *pfirst_index =
  137.             *plast_index  = 1;
  138.             if (avio_check(buf, AVIO_FLAG_READ) > 0)
  139.                 return 0;
  140.             return -1;
  141.         }
  142.         if (avio_check(buf, AVIO_FLAG_READ) > 0)
  143.             break;
  144.     }
  145.     if (first_index == start_index + start_index_range)
  146.         goto fail;
  147.  
  148.     /* find the last image */
  149.     last_index = first_index;
  150.     for (;;) {
  151.         range = 0;
  152.         for (;;) {
  153.             if (!range)
  154.                 range1 = 1;
  155.             else
  156.                 range1 = 2 * range;
  157.             if (av_get_frame_filename(buf, sizeof(buf), path,
  158.                                       last_index + range1) < 0)
  159.                 goto fail;
  160.             if (avio_check(buf, AVIO_FLAG_READ) <= 0)
  161.                 break;
  162.             range = range1;
  163.             /* just in case... */
  164.             if (range >= (1 << 30))
  165.                 goto fail;
  166.         }
  167.         /* we are sure than image last_index + range exists */
  168.         if (!range)
  169.             break;
  170.         last_index += range;
  171.     }
  172.     *pfirst_index = first_index;
  173.     *plast_index  = last_index;
  174.     return 0;
  175.  
  176. fail:
  177.     return -1;
  178. }
  179.  
  180. static int img_read_probe(AVProbeData *p)
  181. {
  182.     if (p->filename && ff_guess_image2_codec(p->filename)) {
  183.         if (av_filename_number_test(p->filename))
  184.             return AVPROBE_SCORE_MAX;
  185.         else if (is_glob(p->filename))
  186.             return AVPROBE_SCORE_MAX;
  187.         else if (av_match_ext(p->filename, "raw") || av_match_ext(p->filename, "gif"))
  188.             return 5;
  189.         else
  190.             return AVPROBE_SCORE_EXTENSION;
  191.     }
  192.     return 0;
  193. }
  194.  
  195. static int img_read_header(AVFormatContext *s1)
  196. {
  197.     VideoDemuxData *s = s1->priv_data;
  198.     int first_index, last_index;
  199.     AVStream *st;
  200.     enum AVPixelFormat pix_fmt = AV_PIX_FMT_NONE;
  201.  
  202.     s1->ctx_flags |= AVFMTCTX_NOHEADER;
  203.  
  204.     st = avformat_new_stream(s1, NULL);
  205.     if (!st) {
  206.         return AVERROR(ENOMEM);
  207.     }
  208.  
  209.     if (s->pixel_format &&
  210.         (pix_fmt = av_get_pix_fmt(s->pixel_format)) == AV_PIX_FMT_NONE) {
  211.         av_log(s1, AV_LOG_ERROR, "No such pixel format: %s.\n",
  212.                s->pixel_format);
  213.         return AVERROR(EINVAL);
  214.     }
  215.  
  216.     av_strlcpy(s->path, s1->filename, sizeof(s->path));
  217.     s->img_number = 0;
  218.     s->img_count  = 0;
  219.  
  220.     /* find format */
  221.     if (s1->iformat->flags & AVFMT_NOFILE)
  222.         s->is_pipe = 0;
  223.     else {
  224.         s->is_pipe       = 1;
  225.         st->need_parsing = AVSTREAM_PARSE_FULL;
  226.     }
  227.  
  228.     if (s->ts_from_file)
  229.         avpriv_set_pts_info(st, 64, 1, 1);
  230.     else
  231.         avpriv_set_pts_info(st, 64, s->framerate.den, s->framerate.num);
  232.  
  233.     if (s->width && s->height) {
  234.         st->codec->width  = s->width;
  235.         st->codec->height = s->height;
  236.     }
  237.  
  238.     if (!s->is_pipe) {
  239.         if (s->pattern_type == PT_GLOB_SEQUENCE) {
  240.         s->use_glob = is_glob(s->path);
  241.         if (s->use_glob) {
  242.             char *p = s->path, *q, *dup;
  243.             int gerr;
  244.  
  245.             av_log(s1, AV_LOG_WARNING, "Pattern type 'glob_sequence' is deprecated: "
  246.                    "use pattern_type 'glob' instead\n");
  247. #if HAVE_GLOB
  248.             dup = q = av_strdup(p);
  249.             while (*q) {
  250.                 /* Do we have room for the next char and a \ insertion? */
  251.                 if ((p - s->path) >= (sizeof(s->path) - 2))
  252.                   break;
  253.                 if (*q == '%' && strspn(q + 1, "%*?[]{}"))
  254.                     ++q;
  255.                 else if (strspn(q, "\\*?[]{}"))
  256.                     *p++ = '\\';
  257.                 *p++ = *q++;
  258.             }
  259.             *p = 0;
  260.             av_free(dup);
  261.  
  262.             gerr = glob(s->path, GLOB_NOCHECK|GLOB_BRACE|GLOB_NOMAGIC, NULL, &s->globstate);
  263.             if (gerr != 0) {
  264.                 return AVERROR(ENOENT);
  265.             }
  266.             first_index = 0;
  267.             last_index = s->globstate.gl_pathc - 1;
  268. #endif
  269.         }
  270.         }
  271.         if ((s->pattern_type == PT_GLOB_SEQUENCE && !s->use_glob) || s->pattern_type == PT_SEQUENCE) {
  272.             if (find_image_range(&first_index, &last_index, s->path,
  273.                                  s->start_number, s->start_number_range) < 0) {
  274.                 av_log(s1, AV_LOG_ERROR,
  275.                        "Could find no file with path '%s' and index in the range %d-%d\n",
  276.                        s->path, s->start_number, s->start_number + s->start_number_range - 1);
  277.                 return AVERROR(ENOENT);
  278.             }
  279.         } else if (s->pattern_type == PT_GLOB) {
  280. #if HAVE_GLOB
  281.             int gerr;
  282.             gerr = glob(s->path, GLOB_NOCHECK|GLOB_BRACE|GLOB_NOMAGIC, NULL, &s->globstate);
  283.             if (gerr != 0) {
  284.                 return AVERROR(ENOENT);
  285.             }
  286.             first_index = 0;
  287.             last_index = s->globstate.gl_pathc - 1;
  288.             s->use_glob = 1;
  289. #else
  290.             av_log(s1, AV_LOG_ERROR,
  291.                    "Pattern type 'glob' was selected but globbing "
  292.                    "is not supported by this libavformat build\n");
  293.             return AVERROR(ENOSYS);
  294. #endif
  295.         } else if (s->pattern_type != PT_GLOB_SEQUENCE) {
  296.             av_log(s1, AV_LOG_ERROR,
  297.                    "Unknown value '%d' for pattern_type option\n", s->pattern_type);
  298.             return AVERROR(EINVAL);
  299.         }
  300.         s->img_first  = first_index;
  301.         s->img_last   = last_index;
  302.         s->img_number = first_index;
  303.         /* compute duration */
  304.         if (!s->ts_from_file) {
  305.             st->start_time = 0;
  306.             st->duration   = last_index - first_index + 1;
  307.         }
  308.     }
  309.  
  310.     if (s1->video_codec_id) {
  311.         st->codec->codec_type = AVMEDIA_TYPE_VIDEO;
  312.         st->codec->codec_id   = s1->video_codec_id;
  313.     } else if (s1->audio_codec_id) {
  314.         st->codec->codec_type = AVMEDIA_TYPE_AUDIO;
  315.         st->codec->codec_id   = s1->audio_codec_id;
  316.     } else {
  317.         const char *str = strrchr(s->path, '.');
  318.         s->split_planes       = str && !av_strcasecmp(str + 1, "y");
  319.         st->codec->codec_type = AVMEDIA_TYPE_VIDEO;
  320.         st->codec->codec_id   = ff_guess_image2_codec(s->path);
  321.         if (st->codec->codec_id == AV_CODEC_ID_LJPEG)
  322.             st->codec->codec_id = AV_CODEC_ID_MJPEG;
  323.     }
  324.     if (st->codec->codec_type == AVMEDIA_TYPE_VIDEO &&
  325.         pix_fmt != AV_PIX_FMT_NONE)
  326.         st->codec->pix_fmt = pix_fmt;
  327.  
  328.     return 0;
  329. }
  330.  
  331. static int img_read_packet(AVFormatContext *s1, AVPacket *pkt)
  332. {
  333.     VideoDemuxData *s = s1->priv_data;
  334.     char filename_bytes[1024];
  335.     char *filename = filename_bytes;
  336.     int i;
  337.     int size[3]           = { 0 }, ret[3] = { 0 };
  338.     AVIOContext *f[3]     = { NULL };
  339.     AVCodecContext *codec = s1->streams[0]->codec;
  340.  
  341.     if (!s->is_pipe) {
  342.         /* loop over input */
  343.         if (s->loop && s->img_number > s->img_last) {
  344.             s->img_number = s->img_first;
  345.         }
  346.         if (s->img_number > s->img_last)
  347.             return AVERROR_EOF;
  348.         if (s->use_glob) {
  349. #if HAVE_GLOB
  350.             filename = s->globstate.gl_pathv[s->img_number];
  351. #endif
  352.         } else {
  353.         if (av_get_frame_filename(filename_bytes, sizeof(filename_bytes),
  354.                                   s->path,
  355.                                   s->img_number) < 0 && s->img_number > 1)
  356.             return AVERROR(EIO);
  357.         }
  358.         for (i = 0; i < 3; i++) {
  359.             if (avio_open2(&f[i], filename, AVIO_FLAG_READ,
  360.                            &s1->interrupt_callback, NULL) < 0) {
  361.                 if (i >= 1)
  362.                     break;
  363.                 av_log(s1, AV_LOG_ERROR, "Could not open file : %s\n",
  364.                        filename);
  365.                 return AVERROR(EIO);
  366.             }
  367.             size[i] = avio_size(f[i]);
  368.  
  369.             if (!s->split_planes)
  370.                 break;
  371.             filename[strlen(filename) - 1] = 'U' + i;
  372.         }
  373.  
  374.         if (codec->codec_id == AV_CODEC_ID_RAWVIDEO && !codec->width)
  375.             infer_size(&codec->width, &codec->height, size[0]);
  376.     } else {
  377.         f[0] = s1->pb;
  378.         if (url_feof(f[0]))
  379.             return AVERROR(EIO);
  380.         if (s->frame_size > 0) {
  381.             size[0] = s->frame_size;
  382.         } else {
  383.             size[0] = 4096;
  384.         }
  385.     }
  386.  
  387.     if (av_new_packet(pkt, size[0] + size[1] + size[2]) < 0)
  388.         return AVERROR(ENOMEM);
  389.     pkt->stream_index = 0;
  390.     pkt->flags       |= AV_PKT_FLAG_KEY;
  391. /*
  392.     if (s->ts_from_file) {
  393.         struct stat img_stat;
  394.         if (stat(filename, &img_stat))
  395.             return AVERROR(EIO);
  396.         pkt->pts = (int64_t)img_stat.st_mtime;
  397.         av_add_index_entry(s1->streams[0], s->img_number, pkt->pts, 0, 0, AVINDEX_KEYFRAME);
  398.     } else if (!s->is_pipe) {
  399.         pkt->pts      = s->pts;
  400.     }
  401. */
  402.     pkt->size = 0;
  403.     for (i = 0; i < 3; i++) {
  404.         if (f[i]) {
  405.             ret[i] = avio_read(f[i], pkt->data + pkt->size, size[i]);
  406.             if (!s->is_pipe)
  407.                 avio_close(f[i]);
  408.             if (ret[i] > 0)
  409.                 pkt->size += ret[i];
  410.         }
  411.     }
  412.  
  413.     if (ret[0] <= 0 || ret[1] < 0 || ret[2] < 0) {
  414.         av_free_packet(pkt);
  415.         return AVERROR(EIO); /* signal EOF */
  416.     } else {
  417.         s->img_count++;
  418.         s->img_number++;
  419.         s->pts++;
  420.         return 0;
  421.     }
  422. }
  423.  
  424. static int img_read_close(struct AVFormatContext* s1)
  425. {
  426.     VideoDemuxData *s = s1->priv_data;
  427. #if HAVE_GLOB
  428.     if (s->use_glob) {
  429.         globfree(&s->globstate);
  430.     }
  431. #endif
  432.     return 0;
  433. }
  434.  
  435. static int img_read_seek(AVFormatContext *s, int stream_index, int64_t timestamp, int flags)
  436. {
  437.     VideoDemuxData *s1 = s->priv_data;
  438.     AVStream *st = s->streams[0];
  439.  
  440.     if (s1->ts_from_file) {
  441.         int index = av_index_search_timestamp(st, timestamp, flags);
  442.         if(index < 0)
  443.             return -1;
  444.         s1->img_number = st->index_entries[index].pos;
  445.         return 0;
  446.     }
  447.  
  448.     if (timestamp < 0 || !s1->loop && timestamp > s1->img_last - s1->img_first)
  449.         return -1;
  450.     s1->img_number = timestamp%(s1->img_last - s1->img_first + 1) + s1->img_first;
  451.     s1->pts = timestamp;
  452.     return 0;
  453. }
  454.  
  455. #define OFFSET(x) offsetof(VideoDemuxData, x)
  456. #define DEC AV_OPT_FLAG_DECODING_PARAM
  457. static const AVOption options[] = {
  458.     { "framerate",    "set the video framerate",             OFFSET(framerate),    AV_OPT_TYPE_VIDEO_RATE, {.str = "25"}, 0, 0,   DEC },
  459.     { "loop",         "force loop over input file sequence", OFFSET(loop),         AV_OPT_TYPE_INT,    {.i64 = 0   }, 0, 1,       DEC },
  460.  
  461.     { "pattern_type", "set pattern type",                    OFFSET(pattern_type), AV_OPT_TYPE_INT,    {.i64=PT_GLOB_SEQUENCE}, 0,       INT_MAX, DEC, "pattern_type"},
  462.     { "glob_sequence","select glob/sequence pattern type",   0, AV_OPT_TYPE_CONST,  {.i64=PT_GLOB_SEQUENCE}, INT_MIN, INT_MAX, DEC, "pattern_type" },
  463.     { "glob",         "select glob pattern type",            0, AV_OPT_TYPE_CONST,  {.i64=PT_GLOB         }, INT_MIN, INT_MAX, DEC, "pattern_type" },
  464.     { "sequence",     "select sequence pattern type",        0, AV_OPT_TYPE_CONST,  {.i64=PT_SEQUENCE     }, INT_MIN, INT_MAX, DEC, "pattern_type" },
  465.  
  466.     { "pixel_format", "set video pixel format",              OFFSET(pixel_format), AV_OPT_TYPE_STRING, {.str = NULL}, 0, 0,       DEC },
  467.     { "start_number", "set first number in the sequence",    OFFSET(start_number), AV_OPT_TYPE_INT,    {.i64 = 0   }, 0, INT_MAX, DEC },
  468.     { "start_number_range", "set range for looking at the first sequence number", OFFSET(start_number_range), AV_OPT_TYPE_INT, {.i64 = 5}, 1, INT_MAX, DEC },
  469.     { "video_size",   "set video size",                      OFFSET(width),        AV_OPT_TYPE_IMAGE_SIZE, {.str = NULL}, 0, 0,   DEC },
  470.     { "frame_size",   "force frame size in bytes",           OFFSET(frame_size),   AV_OPT_TYPE_INT,    {.i64 = 0   }, 0, INT_MAX, DEC },
  471.     { "ts_from_file", "set frame timestamp from file's one", OFFSET(ts_from_file), AV_OPT_TYPE_INT,    {.i64 = 0   }, 0, 1,       DEC },
  472.     { NULL },
  473. };
  474.  
  475. #if CONFIG_IMAGE2_DEMUXER
  476. static const AVClass img2_class = {
  477.     .class_name = "image2 demuxer",
  478.     .item_name  = av_default_item_name,
  479.     .option     = options,
  480.     .version    = LIBAVUTIL_VERSION_INT,
  481. };
  482. AVInputFormat ff_image2_demuxer = {
  483.     .name           = "image2",
  484.     .long_name      = NULL_IF_CONFIG_SMALL("image2 sequence"),
  485.     .priv_data_size = sizeof(VideoDemuxData),
  486.     .read_probe     = img_read_probe,
  487.     .read_header    = img_read_header,
  488.     .read_packet    = img_read_packet,
  489.     .read_close     = img_read_close,
  490.     .read_seek      = img_read_seek,
  491.     .flags          = AVFMT_NOFILE,
  492.     .priv_class     = &img2_class,
  493. };
  494. #endif
  495. #if CONFIG_IMAGE2PIPE_DEMUXER
  496. static const AVClass img2pipe_class = {
  497.     .class_name = "image2pipe demuxer",
  498.     .item_name  = av_default_item_name,
  499.     .option     = options,
  500.     .version    = LIBAVUTIL_VERSION_INT,
  501. };
  502. AVInputFormat ff_image2pipe_demuxer = {
  503.     .name           = "image2pipe",
  504.     .long_name      = NULL_IF_CONFIG_SMALL("piped image2 sequence"),
  505.     .priv_data_size = sizeof(VideoDemuxData),
  506.     .read_header    = img_read_header,
  507.     .read_packet    = img_read_packet,
  508.     .priv_class     = &img2pipe_class,
  509. };
  510. #endif
  511.