2 * Copyright (c) 2010 Stefano Sabatini
3 * Copyright (c) 2008 Victor Paesa
5 * This file is part of FFmpeg.
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.
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.
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
26 * @todo use direct rendering (no allocation of a new frame)
27 * @todo support a PTS correction mechanism
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"
52 /* common A/V fields */
54 int64_t seek_point; ///< seekpoint in microseconds
58 char *stream_specs; /**< user-provided list of streams, separated by + */
59 int stream_index; /**< for compatibility */
62 AVFormatContext *format_ctx;
65 AVFrame *frame; ///< video frame to store the decoded images in
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 */
72 #define OFFSET(x) offsetof(MovieContext, x)
73 #define F AV_OPT_FLAG_FILTERING_PARAM
75 static const AVOption movie_options[]= {
76 {"format_name", "set format name", OFFSET(format_name), AV_OPT_TYPE_STRING, {.str = 0}, CHAR_MIN, CHAR_MAX, F },
77 {"f", "set format name", OFFSET(format_name), AV_OPT_TYPE_STRING, {.str = 0}, CHAR_MIN, CHAR_MAX, F },
78 {"streams", "set streams", OFFSET(stream_specs), AV_OPT_TYPE_STRING, {.str = 0}, CHAR_MAX, CHAR_MAX, F },
79 {"s", "set streams", OFFSET(stream_specs), AV_OPT_TYPE_STRING, {.str = 0}, CHAR_MAX, CHAR_MAX, F },
80 {"si", "set stream index", OFFSET(stream_index), AV_OPT_TYPE_INT, {.i64 = -1}, -1, INT_MAX, F },
81 {"stream_index", "set stream index", OFFSET(stream_index), AV_OPT_TYPE_INT, {.i64 = -1}, -1, INT_MAX, F },
82 {"seek_point", "set seekpoint (seconds)", OFFSET(seek_point_d), AV_OPT_TYPE_DOUBLE, {.dbl = 0}, 0, (INT64_MAX-1) / 1000000, F },
83 {"sp", "set seekpoint (seconds)", OFFSET(seek_point_d), AV_OPT_TYPE_DOUBLE, {.dbl = 0}, 0, (INT64_MAX-1) / 1000000, F },
84 {"loop", "set loop count", OFFSET(loop_count), AV_OPT_TYPE_INT, {.i64 = 1}, 0, INT_MAX, F },
88 static int movie_config_output_props(AVFilterLink *outlink);
89 static int movie_request_frame(AVFilterLink *outlink);
91 static AVStream *find_stream(void *log, AVFormatContext *avf, const char *spec)
93 int i, ret, already = 0, stream_id = -1;
94 char type_char, dummy;
95 AVStream *found = NULL;
96 enum AVMediaType type;
98 ret = sscanf(spec, "d%[av]%d%c", &type_char, &stream_id, &dummy);
99 if (ret >= 1 && ret <= 2) {
100 type = type_char == 'v' ? AVMEDIA_TYPE_VIDEO : AVMEDIA_TYPE_AUDIO;
101 ret = av_find_best_stream(avf, type, stream_id, -1, NULL, 0);
103 av_log(log, AV_LOG_ERROR, "No %s stream with index '%d' found\n",
104 av_get_media_type_string(type), stream_id);
107 return avf->streams[ret];
109 for (i = 0; i < avf->nb_streams; i++) {
110 ret = avformat_match_stream_specifier(avf, avf->streams[i], spec);
112 av_log(log, AV_LOG_ERROR,
113 "Invalid stream specifier \"%s\"\n", spec);
118 if (avf->streams[i]->discard != AVDISCARD_ALL) {
123 av_log(log, AV_LOG_WARNING,
124 "Ambiguous stream specifier \"%s\", using #%d\n", spec, i);
127 found = avf->streams[i];
130 av_log(log, AV_LOG_WARNING, "Stream specifier \"%s\" %s\n", spec,
131 already ? "matched only already used streams" :
132 "did not match any stream");
135 if (found->codec->codec_type != AVMEDIA_TYPE_VIDEO &&
136 found->codec->codec_type != AVMEDIA_TYPE_AUDIO) {
137 av_log(log, AV_LOG_ERROR, "Stream specifier \"%s\" matched a %s stream,"
138 "currently unsupported by libavfilter\n", spec,
139 av_get_media_type_string(found->codec->codec_type));
145 static int open_stream(void *log, MovieStream *st)
150 codec = avcodec_find_decoder(st->st->codec->codec_id);
152 av_log(log, AV_LOG_ERROR, "Failed to find any codec\n");
153 return AVERROR(EINVAL);
156 if ((ret = avcodec_open2(st->st->codec, codec, NULL)) < 0) {
157 av_log(log, AV_LOG_ERROR, "Failed to open codec\n");
164 static int guess_channel_layout(MovieStream *st, int st_index, void *log_ctx)
166 AVCodecContext *dec_ctx = st->st->codec;
168 int64_t chl = av_get_default_channel_layout(dec_ctx->channels);
171 av_log(log_ctx, AV_LOG_ERROR,
172 "Channel layout is not set in stream %d, and could not "
173 "be guessed from the number of channels (%d)\n",
174 st_index, dec_ctx->channels);
175 return AVERROR(EINVAL);
178 av_get_channel_layout_string(buf, sizeof(buf), dec_ctx->channels, chl);
179 av_log(log_ctx, AV_LOG_WARNING,
180 "Channel layout is not set in output stream %d, "
181 "guessed channel layout is '%s'\n",
183 dec_ctx->channel_layout = chl;
187 static av_cold int movie_common_init(AVFilterContext *ctx, const char *args, const AVClass *class)
189 MovieContext *movie = ctx->priv;
190 AVInputFormat *iformat = NULL;
192 int nb_streams, ret, i;
193 char default_streams[16], *stream_specs, *spec, *cursor;
197 movie->class = class;
198 av_opt_set_defaults(movie);
201 movie->file_name = av_get_token(&args, ":");
202 if (!movie->file_name)
203 return AVERROR(ENOMEM);
205 if (!args || !*movie->file_name) {
206 av_log(ctx, AV_LOG_ERROR, "No filename provided!\n");
207 return AVERROR(EINVAL);
210 if (*args++ == ':' && (ret = av_set_options_string(movie, args, "=", ":")) < 0)
213 movie->seek_point = movie->seek_point_d * 1000000 + 0.5;
215 stream_specs = movie->stream_specs;
217 snprintf(default_streams, sizeof(default_streams), "d%c%d",
218 !strcmp(ctx->filter->name, "amovie") ? 'a' : 'v',
219 movie->stream_index);
220 stream_specs = default_streams;
222 for (cursor = stream_specs, nb_streams = 1; *cursor; cursor++)
226 if (movie->loop_count != 1 && nb_streams != 1) {
227 av_log(ctx, AV_LOG_ERROR,
228 "Loop with several streams is currently unsupported\n");
229 return AVERROR_PATCHWELCOME;
234 // Try to find the movie format (container)
235 iformat = movie->format_name ? av_find_input_format(movie->format_name) : NULL;
237 movie->format_ctx = NULL;
238 if ((ret = avformat_open_input(&movie->format_ctx, movie->file_name, iformat, NULL)) < 0) {
239 av_log(ctx, AV_LOG_ERROR,
240 "Failed to avformat_open_input '%s'\n", movie->file_name);
243 if ((ret = avformat_find_stream_info(movie->format_ctx, NULL)) < 0)
244 av_log(ctx, AV_LOG_WARNING, "Failed to find stream info\n");
246 // if seeking requested, we execute it
247 if (movie->seek_point > 0) {
248 timestamp = movie->seek_point;
249 // add the stream start time, should it exist
250 if (movie->format_ctx->start_time != AV_NOPTS_VALUE) {
251 if (timestamp > INT64_MAX - movie->format_ctx->start_time) {
252 av_log(ctx, AV_LOG_ERROR,
253 "%s: seek value overflow with start_time:%"PRId64" seek_point:%"PRId64"\n",
254 movie->file_name, movie->format_ctx->start_time, movie->seek_point);
255 return AVERROR(EINVAL);
257 timestamp += movie->format_ctx->start_time;
259 if ((ret = av_seek_frame(movie->format_ctx, -1, timestamp, AVSEEK_FLAG_BACKWARD)) < 0) {
260 av_log(ctx, AV_LOG_ERROR, "%s: could not seek to position %"PRId64"\n",
261 movie->file_name, timestamp);
266 for (i = 0; i < movie->format_ctx->nb_streams; i++)
267 movie->format_ctx->streams[i]->discard = AVDISCARD_ALL;
269 movie->st = av_calloc(nb_streams, sizeof(*movie->st));
271 return AVERROR(ENOMEM);
273 for (i = 0; i < nb_streams; i++) {
274 spec = av_strtok(stream_specs, "+", &cursor);
277 stream_specs = NULL; /* for next strtok */
278 st = find_stream(ctx, movie->format_ctx, spec);
280 return AVERROR(EINVAL);
281 st->discard = AVDISCARD_DEFAULT;
282 movie->st[i].st = st;
283 movie->max_stream_index = FFMAX(movie->max_stream_index, st->index);
285 if (av_strtok(NULL, "+", &cursor))
288 movie->out_index = av_calloc(movie->max_stream_index + 1,
289 sizeof(*movie->out_index));
290 if (!movie->out_index)
291 return AVERROR(ENOMEM);
292 for (i = 0; i <= movie->max_stream_index; i++)
293 movie->out_index[i] = -1;
294 for (i = 0; i < nb_streams; i++)
295 movie->out_index[movie->st[i].st->index] = i;
297 for (i = 0; i < nb_streams; i++) {
298 AVFilterPad pad = { 0 };
299 snprintf(name, sizeof(name), "out%d", i);
300 pad.type = movie->st[i].st->codec->codec_type;
301 pad.name = av_strdup(name);
302 pad.config_props = movie_config_output_props;
303 pad.request_frame = movie_request_frame;
304 ff_insert_outpad(ctx, i, &pad);
305 ret = open_stream(ctx, &movie->st[i]);
308 if ( movie->st[i].st->codec->codec->type == AVMEDIA_TYPE_AUDIO &&
309 !movie->st[i].st->codec->channel_layout) {
310 ret = guess_channel_layout(&movie->st[i], i, ctx);
316 if (!(movie->frame = avcodec_alloc_frame()) ) {
317 av_log(log, AV_LOG_ERROR, "Failed to alloc frame\n");
318 return AVERROR(ENOMEM);
321 av_log(ctx, AV_LOG_VERBOSE, "seek_point:%"PRIi64" format_name:%s file_name:%s stream_index:%d\n",
322 movie->seek_point, movie->format_name, movie->file_name,
323 movie->stream_index);
328 static av_cold void movie_uninit(AVFilterContext *ctx)
330 MovieContext *movie = ctx->priv;
333 for (i = 0; i < ctx->nb_outputs; i++) {
334 av_freep(&ctx->output_pads[i].name);
336 avcodec_close(movie->st[i].st->codec);
339 av_freep(&movie->file_name);
340 av_freep(&movie->st);
341 av_freep(&movie->out_index);
342 avcodec_free_frame(&movie->frame);
343 if (movie->format_ctx)
344 avformat_close_input(&movie->format_ctx);
347 static int movie_query_formats(AVFilterContext *ctx)
349 MovieContext *movie = ctx->priv;
350 int list[] = { 0, -1 };
351 int64_t list64[] = { 0, -1 };
354 for (i = 0; i < ctx->nb_outputs; i++) {
355 MovieStream *st = &movie->st[i];
356 AVCodecContext *c = st->st->codec;
357 AVFilterLink *outlink = ctx->outputs[i];
359 switch (c->codec_type) {
360 case AVMEDIA_TYPE_VIDEO:
361 list[0] = c->pix_fmt;
362 ff_formats_ref(ff_make_format_list(list), &outlink->in_formats);
364 case AVMEDIA_TYPE_AUDIO:
365 list[0] = c->sample_fmt;
366 ff_formats_ref(ff_make_format_list(list), &outlink->in_formats);
367 list[0] = c->sample_rate;
368 ff_formats_ref(ff_make_format_list(list), &outlink->in_samplerates);
369 list64[0] = c->channel_layout;
370 ff_channel_layouts_ref(avfilter_make_format64_list(list64),
371 &outlink->in_channel_layouts);
379 static int movie_config_output_props(AVFilterLink *outlink)
381 AVFilterContext *ctx = outlink->src;
382 MovieContext *movie = ctx->priv;
383 unsigned out_id = FF_OUTLINK_IDX(outlink);
384 MovieStream *st = &movie->st[out_id];
385 AVCodecContext *c = st->st->codec;
387 outlink->time_base = st->st->time_base;
389 switch (c->codec_type) {
390 case AVMEDIA_TYPE_VIDEO:
391 outlink->w = c->width;
392 outlink->h = c->height;
393 outlink->frame_rate = st->st->r_frame_rate;
395 case AVMEDIA_TYPE_AUDIO:
402 static AVFilterBufferRef *frame_to_buf(enum AVMediaType type, AVFrame *frame,
403 AVFilterLink *outlink)
405 AVFilterBufferRef *buf, *copy;
407 buf = avfilter_get_buffer_ref_from_frame(type, frame,
413 buf->pts = av_frame_get_best_effort_timestamp(frame);
414 copy = ff_copy_buffer_ref(outlink, buf);
417 buf->buf->data[0] = NULL; /* it belongs to the frame */
418 avfilter_unref_buffer(buf);
422 static char *describe_bufref_to_str(char *dst, size_t dst_size,
423 AVFilterBufferRef *buf,
427 case AVMEDIA_TYPE_VIDEO:
428 snprintf(dst, dst_size,
429 "video pts:%s time:%s pos:%"PRId64" size:%dx%d aspect:%d/%d",
430 av_ts2str(buf->pts), av_ts2timestr(buf->pts, &link->time_base),
431 buf->pos, buf->video->w, buf->video->h,
432 buf->video->sample_aspect_ratio.num,
433 buf->video->sample_aspect_ratio.den);
435 case AVMEDIA_TYPE_AUDIO:
436 snprintf(dst, dst_size,
437 "audio pts:%s time:%s pos:%"PRId64" samples:%d",
438 av_ts2str(buf->pts), av_ts2timestr(buf->pts, &link->time_base),
439 buf->pos, buf->audio->nb_samples);
442 snprintf(dst, dst_size, "%s BUG", av_get_media_type_string(buf->type));
448 #define describe_bufref(buf, link) \
449 describe_bufref_to_str((char[1024]){0}, 1024, buf, link)
451 static int rewind_file(AVFilterContext *ctx)
453 MovieContext *movie = ctx->priv;
454 int64_t timestamp = movie->seek_point;
457 if (movie->format_ctx->start_time != AV_NOPTS_VALUE)
458 timestamp += movie->format_ctx->start_time;
459 ret = av_seek_frame(movie->format_ctx, -1, timestamp, AVSEEK_FLAG_BACKWARD);
461 av_log(ctx, AV_LOG_ERROR, "Unable to loop: %s\n", av_err2str(ret));
462 movie->loop_count = 1; /* do not try again */
466 for (i = 0; i < ctx->nb_outputs; i++) {
467 avcodec_flush_buffers(movie->st[i].st->codec);
468 movie->st[i].done = 0;
475 * Try to push a frame to the requested output.
477 * @param ctx filter context
478 * @param out_id number of output where a frame is wanted;
479 * if the frame is read from file, used to set the return value;
480 * if the codec is being flushed, flush the corresponding stream
481 * @return 1 if a frame was pushed on the requested output,
482 * 0 if another attempt is possible,
485 static int movie_push_frame(AVFilterContext *ctx, unsigned out_id)
487 MovieContext *movie = ctx->priv;
488 AVPacket *pkt = &movie->pkt;
490 int ret, got_frame = 0, pkt_out_id;
491 AVFilterLink *outlink;
492 AVFilterBufferRef *buf;
496 if (movie->st[out_id].done) {
497 if (movie->loop_count != 1) {
498 ret = rewind_file(ctx);
501 movie->loop_count -= movie->loop_count > 1;
502 av_log(ctx, AV_LOG_VERBOSE, "Stream finished, looping.\n");
503 return 0; /* retry */
507 pkt->stream_index = movie->st[out_id].st->index;
508 /* packet is already ready for flushing */
510 ret = av_read_frame(movie->format_ctx, &movie->pkt0);
512 av_init_packet(&movie->pkt0); /* ready for flushing */
514 if (ret == AVERROR_EOF) {
516 return 0; /* start flushing */
524 pkt_out_id = pkt->stream_index > movie->max_stream_index ? -1 :
525 movie->out_index[pkt->stream_index];
526 if (pkt_out_id < 0) {
527 av_free_packet(&movie->pkt0);
528 pkt->size = 0; /* ready for next run */
532 st = &movie->st[pkt_out_id];
533 outlink = ctx->outputs[pkt_out_id];
535 switch (st->st->codec->codec_type) {
536 case AVMEDIA_TYPE_VIDEO:
537 ret = avcodec_decode_video2(st->st->codec, movie->frame, &got_frame, pkt);
539 case AVMEDIA_TYPE_AUDIO:
540 ret = avcodec_decode_audio4(st->st->codec, movie->frame, &got_frame, pkt);
543 ret = AVERROR(ENOSYS);
547 av_log(ctx, AV_LOG_WARNING, "Decode error: %s\n", av_err2str(ret));
555 if (pkt->size <= 0) {
556 av_free_packet(&movie->pkt0);
557 pkt->size = 0; /* ready for next run */
566 buf = frame_to_buf(st->st->codec->codec_type, movie->frame, outlink);
568 return AVERROR(ENOMEM);
569 av_dlog(ctx, "movie_push_frame(): file:'%s' %s\n", movie->file_name,
570 describe_bufref(buf, outlink));
571 switch (st->st->codec->codec_type) {
572 case AVMEDIA_TYPE_VIDEO:
573 if (!movie->frame->sample_aspect_ratio.num)
574 buf->video->sample_aspect_ratio = st->st->sample_aspect_ratio;
576 case AVMEDIA_TYPE_AUDIO:
577 ff_filter_frame(outlink, buf);
581 return pkt_out_id == out_id;
584 static int movie_request_frame(AVFilterLink *outlink)
586 AVFilterContext *ctx = outlink->src;
587 unsigned out_id = FF_OUTLINK_IDX(outlink);
591 ret = movie_push_frame(ctx, out_id);
593 return FFMIN(ret, 0);
597 #if CONFIG_MOVIE_FILTER
599 AVFILTER_DEFINE_CLASS(movie);
601 static av_cold int movie_init(AVFilterContext *ctx, const char *args)
603 return movie_common_init(ctx, args, &movie_class);
606 AVFilter avfilter_avsrc_movie = {
608 .description = NULL_IF_CONFIG_SMALL("Read from a movie source."),
609 .priv_size = sizeof(MovieContext),
611 .uninit = movie_uninit,
612 .query_formats = movie_query_formats,
616 .priv_class = &movie_class,
619 #endif /* CONFIG_MOVIE_FILTER */
621 #if CONFIG_AMOVIE_FILTER
623 #define amovie_options movie_options
624 AVFILTER_DEFINE_CLASS(amovie);
626 static av_cold int amovie_init(AVFilterContext *ctx, const char *args)
628 return movie_common_init(ctx, args, &amovie_class);
631 AVFilter avfilter_avsrc_amovie = {
633 .description = NULL_IF_CONFIG_SMALL("Read audio from a movie source."),
634 .priv_size = sizeof(MovieContext),
636 .uninit = movie_uninit,
637 .query_formats = movie_query_formats,
641 .priv_class = &amovie_class,
644 #endif /* CONFIG_AMOVIE_FILTER */