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  1. /*
  2.  * Copyright (c) 2010 Stefano Sabatini
  3.  * Copyright (c) 2008 Victor Paesa
  4.  *
  5.  * This file is part of FFmpeg.
  6.  *
  7.  * FFmpeg is free software; you can redistribute it and/or
  8.  * modify it under the terms of the GNU Lesser General Public
  9.  * License as published by the Free Software Foundation; either
  10.  * version 2.1 of the License, or (at your option) any later version.
  11.  *
  12.  * FFmpeg is distributed in the hope that it will be useful,
  13.  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  14.  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  15.  * Lesser General Public License for more details.
  16.  *
  17.  * You should have received a copy of the GNU Lesser General Public
  18.  * License along with FFmpeg; if not, write to the Free Software
  19.  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
  20.  */
  21.  
  22. /**
  23.  * @file
  24.  * movie video source
  25.  *
  26.  * @todo use direct rendering (no allocation of a new frame)
  27.  * @todo support a PTS correction mechanism
  28.  */
  29.  
  30. #include <float.h>
  31.  
  32. #include "libavutil/attributes.h"
  33. #include "libavutil/avstring.h"
  34. #include "libavutil/avassert.h"
  35. #include "libavutil/opt.h"
  36. #include "libavutil/imgutils.h"
  37. #include "libavutil/timestamp.h"
  38. #include "libavformat/avformat.h"
  39. #include "audio.h"
  40. #include "avcodec.h"
  41. #include "avfilter.h"
  42. #include "formats.h"
  43. #include "internal.h"
  44. #include "video.h"
  45.  
  46. typedef struct {
  47.     AVStream *st;
  48.     int done;
  49. } MovieStream;
  50.  
  51. typedef struct {
  52.     /* common A/V fields */
  53.     const AVClass *class;
  54.     int64_t seek_point;   ///< seekpoint in microseconds
  55.     double seek_point_d;
  56.     char *format_name;
  57.     char *file_name;
  58.     char *stream_specs; /**< user-provided list of streams, separated by + */
  59.     int stream_index; /**< for compatibility */
  60.     int loop_count;
  61.  
  62.     AVFormatContext *format_ctx;
  63.     int eof;
  64.     AVPacket pkt, pkt0;
  65.     AVFrame *frame;   ///< video frame to store the decoded images in
  66.  
  67.     int max_stream_index; /**< max stream # actually used for output */
  68.     MovieStream *st; /**< array of all streams, one per output */
  69.     int *out_index; /**< stream number -> output number map, or -1 */
  70. } MovieContext;
  71.  
  72. #define OFFSET(x) offsetof(MovieContext, x)
  73. #define FLAGS AV_OPT_FLAG_FILTERING_PARAM | AV_OPT_FLAG_AUDIO_PARAM | AV_OPT_FLAG_VIDEO_PARAM
  74.  
  75. static const AVOption movie_options[]= {
  76.     { "filename",     NULL,                      OFFSET(file_name),    AV_OPT_TYPE_STRING,                                    .flags = FLAGS },
  77.     { "format_name",  "set format name",         OFFSET(format_name),  AV_OPT_TYPE_STRING,                                    .flags = FLAGS },
  78.     { "f",            "set format name",         OFFSET(format_name),  AV_OPT_TYPE_STRING,                                    .flags = FLAGS },
  79.     { "stream_index", "set stream index",        OFFSET(stream_index), AV_OPT_TYPE_INT,    { .i64 = -1 }, -1, INT_MAX,                 FLAGS  },
  80.     { "si",           "set stream index",        OFFSET(stream_index), AV_OPT_TYPE_INT,    { .i64 = -1 }, -1, INT_MAX,                 FLAGS  },
  81.     { "seek_point",   "set seekpoint (seconds)", OFFSET(seek_point_d), AV_OPT_TYPE_DOUBLE, { .dbl =  0 },  0, (INT64_MAX-1) / 1000000, FLAGS },
  82.     { "sp",           "set seekpoint (seconds)", OFFSET(seek_point_d), AV_OPT_TYPE_DOUBLE, { .dbl =  0 },  0, (INT64_MAX-1) / 1000000, FLAGS },
  83.     { "streams",      "set streams",             OFFSET(stream_specs), AV_OPT_TYPE_STRING, {.str =  0},  CHAR_MAX, CHAR_MAX, FLAGS },
  84.     { "s",            "set streams",             OFFSET(stream_specs), AV_OPT_TYPE_STRING, {.str =  0},  CHAR_MAX, CHAR_MAX, FLAGS },
  85.     { "loop",         "set loop count",          OFFSET(loop_count),   AV_OPT_TYPE_INT,    {.i64 =  1},  0,        INT_MAX, FLAGS },
  86.     { NULL },
  87. };
  88.  
  89. static int movie_config_output_props(AVFilterLink *outlink);
  90. static int movie_request_frame(AVFilterLink *outlink);
  91.  
  92. static AVStream *find_stream(void *log, AVFormatContext *avf, const char *spec)
  93. {
  94.     int i, ret, already = 0, stream_id = -1;
  95.     char type_char[2], dummy;
  96.     AVStream *found = NULL;
  97.     enum AVMediaType type;
  98.  
  99.     ret = sscanf(spec, "d%1[av]%d%c", type_char, &stream_id, &dummy);
  100.     if (ret >= 1 && ret <= 2) {
  101.         type = type_char[0] == 'v' ? AVMEDIA_TYPE_VIDEO : AVMEDIA_TYPE_AUDIO;
  102.         ret = av_find_best_stream(avf, type, stream_id, -1, NULL, 0);
  103.         if (ret < 0) {
  104.             av_log(log, AV_LOG_ERROR, "No %s stream with index '%d' found\n",
  105.                    av_get_media_type_string(type), stream_id);
  106.             return NULL;
  107.         }
  108.         return avf->streams[ret];
  109.     }
  110.     for (i = 0; i < avf->nb_streams; i++) {
  111.         ret = avformat_match_stream_specifier(avf, avf->streams[i], spec);
  112.         if (ret < 0) {
  113.             av_log(log, AV_LOG_ERROR,
  114.                    "Invalid stream specifier \"%s\"\n", spec);
  115.             return NULL;
  116.         }
  117.         if (!ret)
  118.             continue;
  119.         if (avf->streams[i]->discard != AVDISCARD_ALL) {
  120.             already++;
  121.             continue;
  122.         }
  123.         if (found) {
  124.             av_log(log, AV_LOG_WARNING,
  125.                    "Ambiguous stream specifier \"%s\", using #%d\n", spec, i);
  126.             break;
  127.         }
  128.         found = avf->streams[i];
  129.     }
  130.     if (!found) {
  131.         av_log(log, AV_LOG_WARNING, "Stream specifier \"%s\" %s\n", spec,
  132.                already ? "matched only already used streams" :
  133.                          "did not match any stream");
  134.         return NULL;
  135.     }
  136.     if (found->codec->codec_type != AVMEDIA_TYPE_VIDEO &&
  137.         found->codec->codec_type != AVMEDIA_TYPE_AUDIO) {
  138.         av_log(log, AV_LOG_ERROR, "Stream specifier \"%s\" matched a %s stream,"
  139.                "currently unsupported by libavfilter\n", spec,
  140.                av_get_media_type_string(found->codec->codec_type));
  141.         return NULL;
  142.     }
  143.     return found;
  144. }
  145.  
  146. static int open_stream(void *log, MovieStream *st)
  147. {
  148.     AVCodec *codec;
  149.     int ret;
  150.  
  151.     codec = avcodec_find_decoder(st->st->codec->codec_id);
  152.     if (!codec) {
  153.         av_log(log, AV_LOG_ERROR, "Failed to find any codec\n");
  154.         return AVERROR(EINVAL);
  155.     }
  156.  
  157.     st->st->codec->refcounted_frames = 1;
  158.  
  159.     if ((ret = avcodec_open2(st->st->codec, codec, NULL)) < 0) {
  160.         av_log(log, AV_LOG_ERROR, "Failed to open codec\n");
  161.         return ret;
  162.     }
  163.  
  164.     return 0;
  165. }
  166.  
  167. static int guess_channel_layout(MovieStream *st, int st_index, void *log_ctx)
  168. {
  169.     AVCodecContext *dec_ctx = st->st->codec;
  170.     char buf[256];
  171.     int64_t chl = av_get_default_channel_layout(dec_ctx->channels);
  172.  
  173.     if (!chl) {
  174.         av_log(log_ctx, AV_LOG_ERROR,
  175.                "Channel layout is not set in stream %d, and could not "
  176.                "be guessed from the number of channels (%d)\n",
  177.                st_index, dec_ctx->channels);
  178.         return AVERROR(EINVAL);
  179.     }
  180.  
  181.     av_get_channel_layout_string(buf, sizeof(buf), dec_ctx->channels, chl);
  182.     av_log(log_ctx, AV_LOG_WARNING,
  183.            "Channel layout is not set in output stream %d, "
  184.            "guessed channel layout is '%s'\n",
  185.            st_index, buf);
  186.     dec_ctx->channel_layout = chl;
  187.     return 0;
  188. }
  189.  
  190. static av_cold int movie_common_init(AVFilterContext *ctx)
  191. {
  192.     MovieContext *movie = ctx->priv;
  193.     AVInputFormat *iformat = NULL;
  194.     int64_t timestamp;
  195.     int nb_streams, ret, i;
  196.     char default_streams[16], *stream_specs, *spec, *cursor;
  197.     char name[16];
  198.     AVStream *st;
  199.  
  200.     if (!movie->file_name) {
  201.         av_log(ctx, AV_LOG_ERROR, "No filename provided!\n");
  202.         return AVERROR(EINVAL);
  203.     }
  204.  
  205.     movie->seek_point = movie->seek_point_d * 1000000 + 0.5;
  206.  
  207.     stream_specs = movie->stream_specs;
  208.     if (!stream_specs) {
  209.         snprintf(default_streams, sizeof(default_streams), "d%c%d",
  210.                  !strcmp(ctx->filter->name, "amovie") ? 'a' : 'v',
  211.                  movie->stream_index);
  212.         stream_specs = default_streams;
  213.     }
  214.     for (cursor = stream_specs, nb_streams = 1; *cursor; cursor++)
  215.         if (*cursor == '+')
  216.             nb_streams++;
  217.  
  218.     if (movie->loop_count != 1 && nb_streams != 1) {
  219.         av_log(ctx, AV_LOG_ERROR,
  220.                "Loop with several streams is currently unsupported\n");
  221.         return AVERROR_PATCHWELCOME;
  222.     }
  223.  
  224.     av_register_all();
  225.  
  226.     // Try to find the movie format (container)
  227.     iformat = movie->format_name ? av_find_input_format(movie->format_name) : NULL;
  228.  
  229.     movie->format_ctx = NULL;
  230.     if ((ret = avformat_open_input(&movie->format_ctx, movie->file_name, iformat, NULL)) < 0) {
  231.         av_log(ctx, AV_LOG_ERROR,
  232.                "Failed to avformat_open_input '%s'\n", movie->file_name);
  233.         return ret;
  234.     }
  235.     if ((ret = avformat_find_stream_info(movie->format_ctx, NULL)) < 0)
  236.         av_log(ctx, AV_LOG_WARNING, "Failed to find stream info\n");
  237.  
  238.     // if seeking requested, we execute it
  239.     if (movie->seek_point > 0) {
  240.         timestamp = movie->seek_point;
  241.         // add the stream start time, should it exist
  242.         if (movie->format_ctx->start_time != AV_NOPTS_VALUE) {
  243.             if (timestamp > INT64_MAX - movie->format_ctx->start_time) {
  244.                 av_log(ctx, AV_LOG_ERROR,
  245.                        "%s: seek value overflow with start_time:%"PRId64" seek_point:%"PRId64"\n",
  246.                        movie->file_name, movie->format_ctx->start_time, movie->seek_point);
  247.                 return AVERROR(EINVAL);
  248.             }
  249.             timestamp += movie->format_ctx->start_time;
  250.         }
  251.         if ((ret = av_seek_frame(movie->format_ctx, -1, timestamp, AVSEEK_FLAG_BACKWARD)) < 0) {
  252.             av_log(ctx, AV_LOG_ERROR, "%s: could not seek to position %"PRId64"\n",
  253.                    movie->file_name, timestamp);
  254.             return ret;
  255.         }
  256.     }
  257.  
  258.     for (i = 0; i < movie->format_ctx->nb_streams; i++)
  259.         movie->format_ctx->streams[i]->discard = AVDISCARD_ALL;
  260.  
  261.     movie->st = av_calloc(nb_streams, sizeof(*movie->st));
  262.     if (!movie->st)
  263.         return AVERROR(ENOMEM);
  264.  
  265.     for (i = 0; i < nb_streams; i++) {
  266.         spec = av_strtok(stream_specs, "+", &cursor);
  267.         if (!spec)
  268.             return AVERROR_BUG;
  269.         stream_specs = NULL; /* for next strtok */
  270.         st = find_stream(ctx, movie->format_ctx, spec);
  271.         if (!st)
  272.             return AVERROR(EINVAL);
  273.         st->discard = AVDISCARD_DEFAULT;
  274.         movie->st[i].st = st;
  275.         movie->max_stream_index = FFMAX(movie->max_stream_index, st->index);
  276.     }
  277.     if (av_strtok(NULL, "+", &cursor))
  278.         return AVERROR_BUG;
  279.  
  280.     movie->out_index = av_calloc(movie->max_stream_index + 1,
  281.                                  sizeof(*movie->out_index));
  282.     if (!movie->out_index)
  283.         return AVERROR(ENOMEM);
  284.     for (i = 0; i <= movie->max_stream_index; i++)
  285.         movie->out_index[i] = -1;
  286.     for (i = 0; i < nb_streams; i++)
  287.         movie->out_index[movie->st[i].st->index] = i;
  288.  
  289.     for (i = 0; i < nb_streams; i++) {
  290.         AVFilterPad pad = { 0 };
  291.         snprintf(name, sizeof(name), "out%d", i);
  292.         pad.type          = movie->st[i].st->codec->codec_type;
  293.         pad.name          = av_strdup(name);
  294.         pad.config_props  = movie_config_output_props;
  295.         pad.request_frame = movie_request_frame;
  296.         ff_insert_outpad(ctx, i, &pad);
  297.         ret = open_stream(ctx, &movie->st[i]);
  298.         if (ret < 0)
  299.             return ret;
  300.         if ( movie->st[i].st->codec->codec->type == AVMEDIA_TYPE_AUDIO &&
  301.             !movie->st[i].st->codec->channel_layout) {
  302.             ret = guess_channel_layout(&movie->st[i], i, ctx);
  303.             if (ret < 0)
  304.                 return ret;
  305.         }
  306.     }
  307.  
  308.     av_log(ctx, AV_LOG_VERBOSE, "seek_point:%"PRIi64" format_name:%s file_name:%s stream_index:%d\n",
  309.            movie->seek_point, movie->format_name, movie->file_name,
  310.            movie->stream_index);
  311.  
  312.     return 0;
  313. }
  314.  
  315. static av_cold void movie_uninit(AVFilterContext *ctx)
  316. {
  317.     MovieContext *movie = ctx->priv;
  318.     int i;
  319.  
  320.     for (i = 0; i < ctx->nb_outputs; i++) {
  321.         av_freep(&ctx->output_pads[i].name);
  322.         if (movie->st[i].st)
  323.             avcodec_close(movie->st[i].st->codec);
  324.     }
  325.     av_freep(&movie->st);
  326.     av_freep(&movie->out_index);
  327.     av_frame_free(&movie->frame);
  328.     if (movie->format_ctx)
  329.         avformat_close_input(&movie->format_ctx);
  330. }
  331.  
  332. static int movie_query_formats(AVFilterContext *ctx)
  333. {
  334.     MovieContext *movie = ctx->priv;
  335.     int list[] = { 0, -1 };
  336.     int64_t list64[] = { 0, -1 };
  337.     int i;
  338.  
  339.     for (i = 0; i < ctx->nb_outputs; i++) {
  340.         MovieStream *st = &movie->st[i];
  341.         AVCodecContext *c = st->st->codec;
  342.         AVFilterLink *outlink = ctx->outputs[i];
  343.  
  344.         switch (c->codec_type) {
  345.         case AVMEDIA_TYPE_VIDEO:
  346.             list[0] = c->pix_fmt;
  347.             ff_formats_ref(ff_make_format_list(list), &outlink->in_formats);
  348.             break;
  349.         case AVMEDIA_TYPE_AUDIO:
  350.             list[0] = c->sample_fmt;
  351.             ff_formats_ref(ff_make_format_list(list), &outlink->in_formats);
  352.             list[0] = c->sample_rate;
  353.             ff_formats_ref(ff_make_format_list(list), &outlink->in_samplerates);
  354.             list64[0] = c->channel_layout;
  355.             ff_channel_layouts_ref(avfilter_make_format64_list(list64),
  356.                                    &outlink->in_channel_layouts);
  357.             break;
  358.         }
  359.     }
  360.  
  361.     return 0;
  362. }
  363.  
  364. static int movie_config_output_props(AVFilterLink *outlink)
  365. {
  366.     AVFilterContext *ctx = outlink->src;
  367.     MovieContext *movie  = ctx->priv;
  368.     unsigned out_id = FF_OUTLINK_IDX(outlink);
  369.     MovieStream *st = &movie->st[out_id];
  370.     AVCodecContext *c = st->st->codec;
  371.  
  372.     outlink->time_base = st->st->time_base;
  373.  
  374.     switch (c->codec_type) {
  375.     case AVMEDIA_TYPE_VIDEO:
  376.         outlink->w          = c->width;
  377.         outlink->h          = c->height;
  378.         outlink->frame_rate = st->st->r_frame_rate;
  379.         break;
  380.     case AVMEDIA_TYPE_AUDIO:
  381.         break;
  382.     }
  383.  
  384.     return 0;
  385. }
  386.  
  387. static char *describe_frame_to_str(char *dst, size_t dst_size,
  388.                                     AVFrame *frame,
  389.                                     AVFilterLink *link)
  390. {
  391.     switch (frame->type) {
  392.     case AVMEDIA_TYPE_VIDEO:
  393.         snprintf(dst, dst_size,
  394.                  "video pts:%s time:%s size:%dx%d aspect:%d/%d",
  395.                  av_ts2str(frame->pts), av_ts2timestr(frame->pts, &link->time_base),
  396.                  frame->width, frame->height,
  397.                  frame->sample_aspect_ratio.num,
  398.                  frame->sample_aspect_ratio.den);
  399.                  break;
  400.     case AVMEDIA_TYPE_AUDIO:
  401.         snprintf(dst, dst_size,
  402.                  "audio pts:%s time:%s samples:%d",
  403.                  av_ts2str(frame->pts), av_ts2timestr(frame->pts, &link->time_base),
  404.                  frame->nb_samples);
  405.                  break;
  406.     default:
  407.         snprintf(dst, dst_size, "%s BUG", av_get_media_type_string(frame->type));
  408.         break;
  409.     }
  410.     return dst;
  411. }
  412.  
  413. #define describe_frameref(f, link) \
  414.     describe_frame_to_str((char[1024]){0}, 1024, f, link)
  415.  
  416. static int rewind_file(AVFilterContext *ctx)
  417. {
  418.     MovieContext *movie = ctx->priv;
  419.     int64_t timestamp = movie->seek_point;
  420.     int ret, i;
  421.  
  422.     if (movie->format_ctx->start_time != AV_NOPTS_VALUE)
  423.         timestamp += movie->format_ctx->start_time;
  424.     ret = av_seek_frame(movie->format_ctx, -1, timestamp, AVSEEK_FLAG_BACKWARD);
  425.     if (ret < 0) {
  426.         av_log(ctx, AV_LOG_ERROR, "Unable to loop: %s\n", av_err2str(ret));
  427.         movie->loop_count = 1; /* do not try again */
  428.         return ret;
  429.     }
  430.  
  431.     for (i = 0; i < ctx->nb_outputs; i++) {
  432.         avcodec_flush_buffers(movie->st[i].st->codec);
  433.         movie->st[i].done = 0;
  434.     }
  435.     movie->eof = 0;
  436.     return 0;
  437. }
  438.  
  439. /**
  440.  * Try to push a frame to the requested output.
  441.  *
  442.  * @param ctx     filter context
  443.  * @param out_id  number of output where a frame is wanted;
  444.  *                if the frame is read from file, used to set the return value;
  445.  *                if the codec is being flushed, flush the corresponding stream
  446.  * @return  1 if a frame was pushed on the requested output,
  447.  *          0 if another attempt is possible,
  448.  *          <0 AVERROR code
  449.  */
  450. static int movie_push_frame(AVFilterContext *ctx, unsigned out_id)
  451. {
  452.     MovieContext *movie = ctx->priv;
  453.     AVPacket *pkt = &movie->pkt;
  454.     MovieStream *st;
  455.     int ret, got_frame = 0, pkt_out_id;
  456.     AVFilterLink *outlink;
  457.  
  458.     if (!pkt->size) {
  459.         if (movie->eof) {
  460.             if (movie->st[out_id].done) {
  461.                 if (movie->loop_count != 1) {
  462.                     ret = rewind_file(ctx);
  463.                     if (ret < 0)
  464.                         return ret;
  465.                     movie->loop_count -= movie->loop_count > 1;
  466.                     av_log(ctx, AV_LOG_VERBOSE, "Stream finished, looping.\n");
  467.                     return 0; /* retry */
  468.                 }
  469.                 return AVERROR_EOF;
  470.             }
  471.             pkt->stream_index = movie->st[out_id].st->index;
  472.             /* packet is already ready for flushing */
  473.         } else {
  474.             ret = av_read_frame(movie->format_ctx, &movie->pkt0);
  475.             if (ret < 0) {
  476.                 av_init_packet(&movie->pkt0); /* ready for flushing */
  477.                 *pkt = movie->pkt0;
  478.                 if (ret == AVERROR_EOF) {
  479.                     movie->eof = 1;
  480.                     return 0; /* start flushing */
  481.                 }
  482.                 return ret;
  483.             }
  484.             *pkt = movie->pkt0;
  485.         }
  486.     }
  487.  
  488.     pkt_out_id = pkt->stream_index > movie->max_stream_index ? -1 :
  489.                  movie->out_index[pkt->stream_index];
  490.     if (pkt_out_id < 0) {
  491.         av_free_packet(&movie->pkt0);
  492.         pkt->size = 0; /* ready for next run */
  493.         pkt->data = NULL;
  494.         return 0;
  495.     }
  496.     st = &movie->st[pkt_out_id];
  497.     outlink = ctx->outputs[pkt_out_id];
  498.  
  499.     movie->frame = av_frame_alloc();
  500.     if (!movie->frame)
  501.         return AVERROR(ENOMEM);
  502.  
  503.     switch (st->st->codec->codec_type) {
  504.     case AVMEDIA_TYPE_VIDEO:
  505.         ret = avcodec_decode_video2(st->st->codec, movie->frame, &got_frame, pkt);
  506.         break;
  507.     case AVMEDIA_TYPE_AUDIO:
  508.         ret = avcodec_decode_audio4(st->st->codec, movie->frame, &got_frame, pkt);
  509.         break;
  510.     default:
  511.         ret = AVERROR(ENOSYS);
  512.         break;
  513.     }
  514.     if (ret < 0) {
  515.         av_log(ctx, AV_LOG_WARNING, "Decode error: %s\n", av_err2str(ret));
  516.         av_frame_free(&movie->frame);
  517.         av_free_packet(&movie->pkt0);
  518.         movie->pkt.size = 0;
  519.         movie->pkt.data = NULL;
  520.         return 0;
  521.     }
  522.     if (!ret || st->st->codec->codec_type == AVMEDIA_TYPE_VIDEO)
  523.         ret = pkt->size;
  524.  
  525.     pkt->data += ret;
  526.     pkt->size -= ret;
  527.     if (pkt->size <= 0) {
  528.         av_free_packet(&movie->pkt0);
  529.         pkt->size = 0; /* ready for next run */
  530.         pkt->data = NULL;
  531.     }
  532.     if (!got_frame) {
  533.         if (!ret)
  534.             st->done = 1;
  535.         av_frame_free(&movie->frame);
  536.         return 0;
  537.     }
  538.  
  539.     av_dlog(ctx, "movie_push_frame(): file:'%s' %s\n", movie->file_name,
  540.             describe_frameref(movie->frame, outlink));
  541.  
  542.     movie->frame->pts = av_frame_get_best_effort_timestamp(movie->frame);
  543.     ret = ff_filter_frame(outlink, movie->frame);
  544.     movie->frame = NULL;
  545.  
  546.     if (ret < 0)
  547.         return ret;
  548.     return pkt_out_id == out_id;
  549. }
  550.  
  551. static int movie_request_frame(AVFilterLink *outlink)
  552. {
  553.     AVFilterContext *ctx = outlink->src;
  554.     unsigned out_id = FF_OUTLINK_IDX(outlink);
  555.     int ret;
  556.  
  557.     while (1) {
  558.         ret = movie_push_frame(ctx, out_id);
  559.         if (ret)
  560.             return FFMIN(ret, 0);
  561.     }
  562. }
  563.  
  564. #if CONFIG_MOVIE_FILTER
  565.  
  566. AVFILTER_DEFINE_CLASS(movie);
  567.  
  568. AVFilter avfilter_avsrc_movie = {
  569.     .name          = "movie",
  570.     .description   = NULL_IF_CONFIG_SMALL("Read from a movie source."),
  571.     .priv_size     = sizeof(MovieContext),
  572.     .priv_class    = &movie_class,
  573.     .init          = movie_common_init,
  574.     .uninit        = movie_uninit,
  575.     .query_formats = movie_query_formats,
  576.  
  577.     .inputs    = NULL,
  578.     .outputs   = NULL,
  579.     .flags     = AVFILTER_FLAG_DYNAMIC_OUTPUTS,
  580. };
  581.  
  582. #endif  /* CONFIG_MOVIE_FILTER */
  583.  
  584. #if CONFIG_AMOVIE_FILTER
  585.  
  586. #define amovie_options movie_options
  587. AVFILTER_DEFINE_CLASS(amovie);
  588.  
  589. AVFilter avfilter_avsrc_amovie = {
  590.     .name          = "amovie",
  591.     .description   = NULL_IF_CONFIG_SMALL("Read audio from a movie source."),
  592.     .priv_size     = sizeof(MovieContext),
  593.     .init          = movie_common_init,
  594.     .uninit        = movie_uninit,
  595.     .query_formats = movie_query_formats,
  596.  
  597.     .inputs     = NULL,
  598.     .outputs    = NULL,
  599.     .priv_class = &amovie_class,
  600.     .flags      = AVFILTER_FLAG_DYNAMIC_OUTPUTS,
  601. };
  602.  
  603. #endif /* CONFIG_AMOVIE_FILTER */
  604.