/*
  * Copyright (c) 2010 Stefano Sabatini
  * Copyright (c) 2008 Victor Paesa
  *
  * This file is part of FFmpeg.
  *
  * FFmpeg is free software; you can redistribute it and/or
  * modify it under the terms of the GNU Lesser General Public
  * License as published by the Free Software Foundation; either
  * version 2.1 of the License, or (at your option) any later version.
  *
  * FFmpeg is distributed in the hope that it will be useful,
  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  * Lesser General Public License for more details.
  *
  * You should have received a copy of the GNU Lesser General Public
  * License along with FFmpeg; if not, write to the Free Software
  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
  */
 
 /**
  * @file
  * movie video source
  *
  * @todo use direct rendering (no allocation of a new frame)
  * @todo support a PTS correction mechanism
  */
 
 #include <float.h>

 #include <stdint.h>

 
 #include "libavutil/attributes.h"

 #include "libavutil/avstring.h"

 #include "libavutil/avassert.h"

 #include "libavutil/opt.h"

 #include "libavutil/imgutils.h"

 #include "libavutil/internal.h"

 #include "libavutil/timestamp.h"

 
 #include "libavcodec/avcodec.h"
 

 #include "libavformat/avformat.h"

 #include "audio.h"

 #include "avfilter.h"

 #include "formats.h"

 #include "internal.h"

 #include "video.h"

 typedef struct MovieStream {

     AVStream *st;

     AVCodecContext *codec_ctx;

     int done;

     int64_t discontinuity_threshold;
     int64_t last_pts;

 } MovieStream;

 typedef struct MovieContext {

     /* common A/V fields */

     const AVClass *class;
     int64_t seek_point;   ///< seekpoint in microseconds
     double seek_point_d;
     char *format_name;
     char *file_name;

     char *stream_specs; /**< user-provided list of streams, separated by + */
     int stream_index; /**< for compatibility */

     int loop_count;

     int64_t discontinuity_threshold;
     int64_t ts_offset;

 
     AVFormatContext *format_ctx;

     int eof;
     AVPacket pkt, pkt0;

     int max_stream_index; /**< max stream # actually used for output */
     MovieStream *st; /**< array of all streams, one per output */
     int *out_index; /**< stream number -> output number map, or -1 */

 } MovieContext;
 
 #define OFFSET(x) offsetof(MovieContext, x)

 #define FLAGS AV_OPT_FLAG_FILTERING_PARAM | AV_OPT_FLAG_AUDIO_PARAM | AV_OPT_FLAG_VIDEO_PARAM

 
 static const AVOption movie_options[]= {

     { "filename",     NULL,                      OFFSET(file_name),    AV_OPT_TYPE_STRING,                                    .flags = FLAGS },
     { "format_name",  "set format name",         OFFSET(format_name),  AV_OPT_TYPE_STRING,                                    .flags = FLAGS },
     { "f",            "set format name",         OFFSET(format_name),  AV_OPT_TYPE_STRING,                                    .flags = FLAGS },
     { "stream_index", "set stream index",        OFFSET(stream_index), AV_OPT_TYPE_INT,    { .i64 = -1 }, -1, INT_MAX,                 FLAGS  },
     { "si",           "set stream index",        OFFSET(stream_index), AV_OPT_TYPE_INT,    { .i64 = -1 }, -1, INT_MAX,                 FLAGS  },
     { "seek_point",   "set seekpoint (seconds)", OFFSET(seek_point_d), AV_OPT_TYPE_DOUBLE, { .dbl =  0 },  0, (INT64_MAX-1) / 1000000, FLAGS },
     { "sp",           "set seekpoint (seconds)", OFFSET(seek_point_d), AV_OPT_TYPE_DOUBLE, { .dbl =  0 },  0, (INT64_MAX-1) / 1000000, FLAGS },
     { "streams",      "set streams",             OFFSET(stream_specs), AV_OPT_TYPE_STRING, {.str =  0},  CHAR_MAX, CHAR_MAX, FLAGS },
     { "s",            "set streams",             OFFSET(stream_specs), AV_OPT_TYPE_STRING, {.str =  0},  CHAR_MAX, CHAR_MAX, FLAGS },
     { "loop",         "set loop count",          OFFSET(loop_count),   AV_OPT_TYPE_INT,    {.i64 =  1},  0,        INT_MAX, FLAGS },

     { "discontinuity", "set discontinuity threshold", OFFSET(discontinuity_threshold), AV_OPT_TYPE_DURATION, {.i64 = 0}, 0, INT64_MAX, FLAGS },

     { NULL },

 };
 

 static int movie_config_output_props(AVFilterLink *outlink);
 static int movie_request_frame(AVFilterLink *outlink);
 
 static AVStream *find_stream(void *log, AVFormatContext *avf, const char *spec)
 {
     int i, ret, already = 0, stream_id = -1;

     char type_char[2], dummy;

     AVStream *found = NULL;
     enum AVMediaType type;
 

     ret = sscanf(spec, "d%1[av]%d%c", type_char, &stream_id, &dummy);

     if (ret >= 1 && ret <= 2) {

         type = type_char[0] == 'v' ? AVMEDIA_TYPE_VIDEO : AVMEDIA_TYPE_AUDIO;

         ret = av_find_best_stream(avf, type, stream_id, -1, NULL, 0);
         if (ret < 0) {
             av_log(log, AV_LOG_ERROR, "No %s stream with index '%d' found\n",
                    av_get_media_type_string(type), stream_id);
             return NULL;
         }
         return avf->streams[ret];
     }
     for (i = 0; i < avf->nb_streams; i++) {
         ret = avformat_match_stream_specifier(avf, avf->streams[i], spec);
         if (ret < 0) {
             av_log(log, AV_LOG_ERROR,
                    "Invalid stream specifier \"%s\"\n", spec);
             return NULL;
         }
         if (!ret)
             continue;
         if (avf->streams[i]->discard != AVDISCARD_ALL) {
             already++;
             continue;
         }
         if (found) {
             av_log(log, AV_LOG_WARNING,
                    "Ambiguous stream specifier \"%s\", using #%d\n", spec, i);
             break;
         }
         found = avf->streams[i];
     }
     if (!found) {
         av_log(log, AV_LOG_WARNING, "Stream specifier \"%s\" %s\n", spec,
                already ? "matched only already used streams" :
                          "did not match any stream");
         return NULL;
     }

     if (found->codecpar->codec_type != AVMEDIA_TYPE_VIDEO &&
         found->codecpar->codec_type != AVMEDIA_TYPE_AUDIO) {

         av_log(log, AV_LOG_ERROR, "Stream specifier \"%s\" matched a %s stream,"
                "currently unsupported by libavfilter\n", spec,

                av_get_media_type_string(found->codecpar->codec_type));

         return NULL;
     }
     return found;
 }
 
 static int open_stream(void *log, MovieStream *st)
 {
     AVCodec *codec;
     int ret;
 

     codec = avcodec_find_decoder(st->st->codecpar->codec_id);

     if (!codec) {
         av_log(log, AV_LOG_ERROR, "Failed to find any codec\n");
         return AVERROR(EINVAL);
     }
 

     st->codec_ctx = avcodec_alloc_context3(codec);
     if (!st->codec_ctx)
         return AVERROR(ENOMEM);
 
     ret = avcodec_parameters_to_context(st->codec_ctx, st->st->codecpar);
     if (ret < 0)
         return ret;
 
     st->codec_ctx->refcounted_frames = 1;

     if ((ret = avcodec_open2(st->codec_ctx, codec, NULL)) < 0) {

         av_log(log, AV_LOG_ERROR, "Failed to open codec\n");
         return ret;
     }
 
     return 0;
 }
 

 static int guess_channel_layout(MovieStream *st, int st_index, void *log_ctx)
 {

     AVCodecParameters *dec_par = st->st->codecpar;

     char buf[256];

     int64_t chl = av_get_default_channel_layout(dec_par->channels);

 
     if (!chl) {
         av_log(log_ctx, AV_LOG_ERROR,
                "Channel layout is not set in stream %d, and could not "
                "be guessed from the number of channels (%d)\n",

                st_index, dec_par->channels);

         return AVERROR(EINVAL);
     }
 

     av_get_channel_layout_string(buf, sizeof(buf), dec_par->channels, chl);

     av_log(log_ctx, AV_LOG_WARNING,
            "Channel layout is not set in output stream %d, "
            "guessed channel layout is '%s'\n",
            st_index, buf);

     dec_par->channel_layout = chl;

     return 0;
 }
 

 static av_cold int movie_common_init(AVFilterContext *ctx)

 {
     MovieContext *movie = ctx->priv;
     AVInputFormat *iformat = NULL;
     int64_t timestamp;

     int nb_streams = 1, ret, i;

     char default_streams[16], *stream_specs, *spec, *cursor;
     char name[16];
     AVStream *st;

     if (!movie->file_name) {

         av_log(ctx, AV_LOG_ERROR, "No filename provided!\n");
         return AVERROR(EINVAL);
     }
 
     movie->seek_point = movie->seek_point_d * 1000000 + 0.5;

     stream_specs = movie->stream_specs;
     if (!stream_specs) {
         snprintf(default_streams, sizeof(default_streams), "d%c%d",
                  !strcmp(ctx->filter->name, "amovie") ? 'a' : 'v',
                  movie->stream_index);
         stream_specs = default_streams;
     }

     for (cursor = stream_specs; *cursor; cursor++)

         if (*cursor == '+')
             nb_streams++;
 
     if (movie->loop_count != 1 && nb_streams != 1) {
         av_log(ctx, AV_LOG_ERROR,
                "Loop with several streams is currently unsupported\n");
         return AVERROR_PATCHWELCOME;
     }
 

     av_register_all();
 
     // Try to find the movie format (container)
     iformat = movie->format_name ? av_find_input_format(movie->format_name) : NULL;
 
     movie->format_ctx = NULL;

     if ((ret = avformat_open_input(&movie->format_ctx, movie->file_name, iformat, NULL)) < 0) {

         av_log(ctx, AV_LOG_ERROR,

                "Failed to avformat_open_input '%s'\n", movie->file_name);

         return ret;
     }

     if ((ret = avformat_find_stream_info(movie->format_ctx, NULL)) < 0)

         av_log(ctx, AV_LOG_WARNING, "Failed to find stream info\n");
 
     // if seeking requested, we execute it
     if (movie->seek_point > 0) {
         timestamp = movie->seek_point;
         // add the stream start time, should it exist
         if (movie->format_ctx->start_time != AV_NOPTS_VALUE) {

             if (timestamp > 0 && movie->format_ctx->start_time > INT64_MAX - timestamp) {

                 av_log(ctx, AV_LOG_ERROR,
                        "%s: seek value overflow with start_time:%"PRId64" seek_point:%"PRId64"\n",
                        movie->file_name, movie->format_ctx->start_time, movie->seek_point);
                 return AVERROR(EINVAL);
             }
             timestamp += movie->format_ctx->start_time;
         }
         if ((ret = av_seek_frame(movie->format_ctx, -1, timestamp, AVSEEK_FLAG_BACKWARD)) < 0) {
             av_log(ctx, AV_LOG_ERROR, "%s: could not seek to position %"PRId64"\n",
                    movie->file_name, timestamp);
             return ret;
         }
     }
 

     for (i = 0; i < movie->format_ctx->nb_streams; i++)
         movie->format_ctx->streams[i]->discard = AVDISCARD_ALL;
 
     movie->st = av_calloc(nb_streams, sizeof(*movie->st));
     if (!movie->st)
         return AVERROR(ENOMEM);
 
     for (i = 0; i < nb_streams; i++) {
         spec = av_strtok(stream_specs, "+", &cursor);
         if (!spec)
             return AVERROR_BUG;
         stream_specs = NULL; /* for next strtok */
         st = find_stream(ctx, movie->format_ctx, spec);
         if (!st)
             return AVERROR(EINVAL);
         st->discard = AVDISCARD_DEFAULT;
         movie->st[i].st = st;
         movie->max_stream_index = FFMAX(movie->max_stream_index, st->index);

         movie->st[i].discontinuity_threshold =
             av_rescale_q(movie->discontinuity_threshold, AV_TIME_BASE_Q, st->time_base);

     }

     if (av_strtok(NULL, "+", &cursor))
         return AVERROR_BUG;
 
     movie->out_index = av_calloc(movie->max_stream_index + 1,
                                  sizeof(*movie->out_index));
     if (!movie->out_index)
         return AVERROR(ENOMEM);
     for (i = 0; i <= movie->max_stream_index; i++)
         movie->out_index[i] = -1;
     for (i = 0; i < nb_streams; i++) {
         AVFilterPad pad = { 0 };

         movie->out_index[movie->st[i].st->index] = i;

         snprintf(name, sizeof(name), "out%d", i);

         pad.type          = movie->st[i].st->codecpar->codec_type;

         pad.name          = av_strdup(name);

         if (!pad.name)
             return AVERROR(ENOMEM);

         pad.config_props  = movie_config_output_props;
         pad.request_frame = movie_request_frame;

         if ((ret = ff_insert_outpad(ctx, i, &pad)) < 0) {
             av_freep(&pad.name);
             return ret;
         }

         if ( movie->st[i].st->codecpar->codec_type == AVMEDIA_TYPE_AUDIO &&
             !movie->st[i].st->codecpar->channel_layout) {

             ret = guess_channel_layout(&movie->st[i], i, ctx);
             if (ret < 0)
                 return ret;
         }

         ret = open_stream(ctx, &movie->st[i]);
         if (ret < 0)
             return ret;

     }
 

     av_log(ctx, AV_LOG_VERBOSE, "seek_point:%"PRIi64" format_name:%s file_name:%s stream_index:%d\n",

            movie->seek_point, movie->format_name, movie->file_name,
            movie->stream_index);
 
     return 0;
 }
 

 static av_cold void movie_uninit(AVFilterContext *ctx)

 {
     MovieContext *movie = ctx->priv;

     int i;

     for (i = 0; i < ctx->nb_outputs; i++) {
         av_freep(&ctx->output_pads[i].name);
         if (movie->st[i].st)

             avcodec_free_context(&movie->st[i].codec_ctx);

     }
     av_freep(&movie->st);
     av_freep(&movie->out_index);

     if (movie->format_ctx)

         avformat_close_input(&movie->format_ctx);

 }
 

 static int movie_query_formats(AVFilterContext *ctx)

 {
     MovieContext *movie = ctx->priv;

     int list[] = { 0, -1 };
     int64_t list64[] = { 0, -1 };

     int i, ret;

 
     for (i = 0; i < ctx->nb_outputs; i++) {
         MovieStream *st = &movie->st[i];

         AVCodecParameters *c = st->st->codecpar;

         AVFilterLink *outlink = ctx->outputs[i];
 
         switch (c->codec_type) {
         case AVMEDIA_TYPE_VIDEO:

             list[0] = c->format;

             if ((ret = ff_formats_ref(ff_make_format_list(list), &outlink->in_formats)) < 0)
                 return ret;

             break;
         case AVMEDIA_TYPE_AUDIO:

             list[0] = c->format;

             if ((ret = ff_formats_ref(ff_make_format_list(list), &outlink->in_formats)) < 0)
                 return ret;

             list[0] = c->sample_rate;

             if ((ret = ff_formats_ref(ff_make_format_list(list), &outlink->in_samplerates)) < 0)
                 return ret;

             list64[0] = c->channel_layout;

             if ((ret = ff_channel_layouts_ref(avfilter_make_format64_list(list64),
                                    &outlink->in_channel_layouts)) < 0)
                 return ret;

             break;
         }
     }

     return 0;
 }

 static int movie_config_output_props(AVFilterLink *outlink)
 {
     AVFilterContext *ctx = outlink->src;
     MovieContext *movie  = ctx->priv;
     unsigned out_id = FF_OUTLINK_IDX(outlink);
     MovieStream *st = &movie->st[out_id];

     AVCodecParameters *c = st->st->codecpar;

 
     outlink->time_base = st->st->time_base;
 
     switch (c->codec_type) {
     case AVMEDIA_TYPE_VIDEO:
         outlink->w          = c->width;
         outlink->h          = c->height;
         outlink->frame_rate = st->st->r_frame_rate;
         break;
     case AVMEDIA_TYPE_AUDIO:
         break;
     }

 
     return 0;
 }
 

 static char *describe_frame_to_str(char *dst, size_t dst_size,

                                    AVFrame *frame, enum AVMediaType frame_type,
                                    AVFilterLink *link)

 {

     switch (frame_type) {

     case AVMEDIA_TYPE_VIDEO:
         snprintf(dst, dst_size,

                  "video pts:%s time:%s size:%dx%d aspect:%d/%d",
                  av_ts2str(frame->pts), av_ts2timestr(frame->pts, &link->time_base),
                  frame->width, frame->height,
                  frame->sample_aspect_ratio.num,
                  frame->sample_aspect_ratio.den);

                  break;
     case AVMEDIA_TYPE_AUDIO:
         snprintf(dst, dst_size,

                  "audio pts:%s time:%s samples:%d",
                  av_ts2str(frame->pts), av_ts2timestr(frame->pts, &link->time_base),
                  frame->nb_samples);

                  break;
     default:

         snprintf(dst, dst_size, "%s BUG", av_get_media_type_string(frame_type));

         break;
     }
     return dst;

 }
 

 static int rewind_file(AVFilterContext *ctx)

 {

     MovieContext *movie = ctx->priv;
     int64_t timestamp = movie->seek_point;
     int ret, i;

     if (movie->format_ctx->start_time != AV_NOPTS_VALUE)
         timestamp += movie->format_ctx->start_time;
     ret = av_seek_frame(movie->format_ctx, -1, timestamp, AVSEEK_FLAG_BACKWARD);
     if (ret < 0) {
         av_log(ctx, AV_LOG_ERROR, "Unable to loop: %s\n", av_err2str(ret));
         movie->loop_count = 1; /* do not try again */
         return ret;
     }

     for (i = 0; i < ctx->nb_outputs; i++) {

         avcodec_flush_buffers(movie->st[i].codec_ctx);

         movie->st[i].done = 0;
     }
     movie->eof = 0;

     return 0;
 }
 

 /**
  * Try to push a frame to the requested output.
  *

  * @param ctx     filter context
  * @param out_id  number of output where a frame is wanted;
  *                if the frame is read from file, used to set the return value;
  *                if the codec is being flushed, flush the corresponding stream

  * @return  1 if a frame was pushed on the requested output,
  *          0 if another attempt is possible,
  *          <0 AVERROR code
  */
 static int movie_push_frame(AVFilterContext *ctx, unsigned out_id)

 {

     MovieContext *movie = ctx->priv;
     AVPacket *pkt = &movie->pkt;

     enum AVMediaType frame_type;

     MovieStream *st;
     int ret, got_frame = 0, pkt_out_id;
     AVFilterLink *outlink;

     AVFrame *frame;

 
     if (!pkt->size) {
         if (movie->eof) {
             if (movie->st[out_id].done) {

                 if (movie->loop_count != 1) {

                     ret = rewind_file(ctx);
                     if (ret < 0)
                         return ret;
                     movie->loop_count -= movie->loop_count > 1;
                     av_log(ctx, AV_LOG_VERBOSE, "Stream finished, looping.\n");
                     return 0; /* retry */

                 }

                 return AVERROR_EOF;

             }

             pkt->stream_index = movie->st[out_id].st->index;

             /* packet is already ready for flushing */
         } else {
             ret = av_read_frame(movie->format_ctx, &movie->pkt0);
             if (ret < 0) {
                 av_init_packet(&movie->pkt0); /* ready for flushing */
                 *pkt = movie->pkt0;
                 if (ret == AVERROR_EOF) {
                     movie->eof = 1;
                     return 0; /* start flushing */
                 }
                 return ret;
             }
             *pkt = movie->pkt0;

         }
     }
 

     pkt_out_id = pkt->stream_index > movie->max_stream_index ? -1 :
                  movie->out_index[pkt->stream_index];
     if (pkt_out_id < 0) {

         av_packet_unref(&movie->pkt0);

         pkt->size = 0; /* ready for next run */
         pkt->data = NULL;
         return 0;
     }
     st = &movie->st[pkt_out_id];
     outlink = ctx->outputs[pkt_out_id];
 

     frame = av_frame_alloc();
     if (!frame)

         return AVERROR(ENOMEM);
 

     frame_type = st->st->codecpar->codec_type;

     switch (frame_type) {

     case AVMEDIA_TYPE_VIDEO:

         ret = avcodec_decode_video2(st->codec_ctx, frame, &got_frame, pkt);

         break;
     case AVMEDIA_TYPE_AUDIO:

         ret = avcodec_decode_audio4(st->codec_ctx, frame, &got_frame, pkt);

         break;
     default:
         ret = AVERROR(ENOSYS);
         break;
     }
     if (ret < 0) {
         av_log(ctx, AV_LOG_WARNING, "Decode error: %s\n", av_err2str(ret));

         av_frame_free(&frame);

         av_packet_unref(&movie->pkt0);

         movie->pkt.size = 0;
         movie->pkt.data = NULL;

         return 0;
     }

     if (!ret || st->st->codecpar->codec_type == AVMEDIA_TYPE_VIDEO)

         ret = pkt->size;
 
     pkt->data += ret;
     pkt->size -= ret;
     if (pkt->size <= 0) {

         av_packet_unref(&movie->pkt0);

         pkt->size = 0; /* ready for next run */
         pkt->data = NULL;
     }
     if (!got_frame) {
         if (!ret)
             st->done = 1;

         av_frame_free(&frame);

         return 0;
     }
 

     frame->pts = frame->best_effort_timestamp;

     if (frame->pts != AV_NOPTS_VALUE) {
         if (movie->ts_offset)
             frame->pts += av_rescale_q_rnd(movie->ts_offset, AV_TIME_BASE_Q, outlink->time_base, AV_ROUND_UP);
         if (st->discontinuity_threshold) {
             if (st->last_pts != AV_NOPTS_VALUE) {
                 int64_t diff = frame->pts - st->last_pts;
                 if (diff < 0 || diff > st->discontinuity_threshold) {
                     av_log(ctx, AV_LOG_VERBOSE, "Discontinuity in stream:%d diff:%"PRId64"\n", pkt_out_id, diff);
                     movie->ts_offset += av_rescale_q_rnd(-diff, outlink->time_base, AV_TIME_BASE_Q, AV_ROUND_UP);
                     frame->pts -= diff;
                 }
             }
         }
         st->last_pts = frame->pts;
     }

     ff_dlog(ctx, "movie_push_frame(): file:'%s' %s\n", movie->file_name,

             describe_frame_to_str((char[1024]){0}, 1024, frame, frame_type, outlink));

     if (st->st->codecpar->codec_type == AVMEDIA_TYPE_VIDEO) {

         if (frame->format != outlink->format) {

             av_log(ctx, AV_LOG_ERROR, "Format changed %s -> %s, discarding frame\n",
                 av_get_pix_fmt_name(outlink->format),

                 av_get_pix_fmt_name(frame->format)

                 );

             av_frame_free(&frame);

             return 0;
         }
     }

     ret = ff_filter_frame(outlink, frame);

     if (ret < 0)
         return ret;

     return pkt_out_id == out_id;

 }
 

 static int movie_request_frame(AVFilterLink *outlink)

 {

     AVFilterContext *ctx = outlink->src;
     unsigned out_id = FF_OUTLINK_IDX(outlink);

     int ret;
 

     while (1) {
         ret = movie_push_frame(ctx, out_id);
         if (ret)
             return FFMIN(ret, 0);

     }

 }
 

 static int process_command(AVFilterContext *ctx, const char *cmd, const char *args,
                            char *res, int res_len, int flags)
 {
     MovieContext *movie = ctx->priv;
     int ret = AVERROR(ENOSYS);
 
     if (!strcmp(cmd, "seek")) {
         int idx, flags, i;
         int64_t ts;
         char tail[2];
 
         if (sscanf(args, "%i|%"SCNi64"|%i %1s", &idx, &ts, &flags, tail) != 3)
             return AVERROR(EINVAL);
 
         ret = av_seek_frame(movie->format_ctx, idx, ts, flags);
         if (ret < 0)
             return ret;
 
         for (i = 0; i < ctx->nb_outputs; i++) {
             avcodec_flush_buffers(movie->st[i].codec_ctx);
             movie->st[i].done = 0;
         }
         return ret;
     } else if (!strcmp(cmd, "get_duration")) {
         int print_len;
         char tail[2];
 
         if (!res || res_len <= 0)
             return AVERROR(EINVAL);
 
         if (args && sscanf(args, "%1s", tail) == 1)
             return AVERROR(EINVAL);
 
         print_len = snprintf(res, res_len, "%"PRId64, movie->format_ctx->duration);
         if (print_len < 0 || print_len >= res_len)
             return AVERROR(EINVAL);
 
         return 0;
     }
 
     return ret;
 }
 

 #if CONFIG_MOVIE_FILTER
 

 AVFILTER_DEFINE_CLASS(movie);
 

 AVFilter ff_avsrc_movie = {

     .name          = "movie",
     .description   = NULL_IF_CONFIG_SMALL("Read from a movie source."),
     .priv_size     = sizeof(MovieContext),

     .priv_class    = &movie_class,

     .init          = movie_common_init,

     .uninit        = movie_uninit,

     .query_formats = movie_query_formats,

     .inputs    = NULL,

     .outputs   = NULL,

     .flags     = AVFILTER_FLAG_DYNAMIC_OUTPUTS,

     .process_command = process_command

 };

 
 #endif  /* CONFIG_MOVIE_FILTER */
 
 #if CONFIG_AMOVIE_FILTER
 

 #define amovie_options movie_options
 AVFILTER_DEFINE_CLASS(amovie);
 

 AVFilter ff_avsrc_amovie = {

     .name          = "amovie",
     .description   = NULL_IF_CONFIG_SMALL("Read audio from a movie source."),
     .priv_size     = sizeof(MovieContext),

     .init          = movie_common_init,

     .uninit        = movie_uninit,
     .query_formats = movie_query_formats,

     .inputs     = NULL,
     .outputs    = NULL,

     .priv_class = &amovie_class,

     .flags      = AVFILTER_FLAG_DYNAMIC_OUTPUTS,

     .process_command = process_command,

 };
 
 #endif /* CONFIG_AMOVIE_FILTER */