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)
74 static const AVOption movie_options[]= {
75 {"format_name", "set format name", OFFSET(format_name), AV_OPT_TYPE_STRING, {.str = 0}, CHAR_MIN, CHAR_MAX },
76 {"f", "set format name", OFFSET(format_name), AV_OPT_TYPE_STRING, {.str = 0}, CHAR_MIN, CHAR_MAX },
77 {"streams", "set streams", OFFSET(stream_specs), AV_OPT_TYPE_STRING, {.str = 0}, CHAR_MAX, CHAR_MAX },
78 {"s", "set streams", OFFSET(stream_specs), AV_OPT_TYPE_STRING, {.str = 0}, CHAR_MAX, CHAR_MAX },
79 {"si", "set stream index", OFFSET(stream_index), AV_OPT_TYPE_INT, {.dbl = -1}, -1, INT_MAX },
80 {"stream_index", "set stream index", OFFSET(stream_index), AV_OPT_TYPE_INT, {.dbl = -1}, -1, INT_MAX },
81 {"seek_point", "set seekpoint (seconds)", OFFSET(seek_point_d), AV_OPT_TYPE_DOUBLE, {.dbl = 0}, 0, (INT64_MAX-1) / 1000000 },
82 {"sp", "set seekpoint (seconds)", OFFSET(seek_point_d), AV_OPT_TYPE_DOUBLE, {.dbl = 0}, 0, (INT64_MAX-1) / 1000000 },
83 {"loop", "set loop count", OFFSET(loop_count), AV_OPT_TYPE_INT, {.dbl = 1}, 0, INT_MAX },
87 AVFILTER_DEFINE_CLASS(movie);
89 static int movie_config_output_props(AVFilterLink *outlink);
90 static int movie_request_frame(AVFilterLink *outlink);
92 static AVStream *find_stream(void *log, AVFormatContext *avf, const char *spec)
94 int i, ret, already = 0, stream_id = -1;
95 char type_char, dummy;
96 AVStream *found = NULL;
97 enum AVMediaType type;
99 ret = sscanf(spec, "d%[av]%d%c", &type_char, &stream_id, &dummy);
100 if (ret >= 1 && ret <= 2) {
101 type = type_char == 'v' ? AVMEDIA_TYPE_VIDEO : AVMEDIA_TYPE_AUDIO;
102 ret = av_find_best_stream(avf, type, stream_id, -1, NULL, 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);
108 return avf->streams[ret];
110 for (i = 0; i < avf->nb_streams; i++) {
111 ret = avformat_match_stream_specifier(avf, avf->streams[i], spec);
113 av_log(log, AV_LOG_ERROR,
114 "Invalid stream specifier \"%s\"\n", spec);
119 if (avf->streams[i]->discard != AVDISCARD_ALL) {
124 av_log(log, AV_LOG_WARNING,
125 "Ambiguous stream specifier \"%s\", using #%d\n", spec, i);
128 found = avf->streams[i];
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");
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));
146 static int open_stream(void *log, MovieStream *st)
151 codec = avcodec_find_decoder(st->st->codec->codec_id);
153 av_log(log, AV_LOG_ERROR, "Failed to find any codec\n");
154 return AVERROR(EINVAL);
157 if ((ret = avcodec_open2(st->st->codec, codec, NULL)) < 0) {
158 av_log(log, AV_LOG_ERROR, "Failed to open codec\n");
165 static av_cold int movie_init(AVFilterContext *ctx, const char *args)
167 MovieContext *movie = ctx->priv;
168 AVInputFormat *iformat = NULL;
170 int nb_streams, ret, i;
171 char default_streams[16], *stream_specs, *spec, *cursor;
175 movie->class = &movie_class;
176 av_opt_set_defaults(movie);
179 movie->file_name = av_get_token(&args, ":");
180 if (!movie->file_name || !*movie->file_name) {
181 av_log(ctx, AV_LOG_ERROR, "No filename provided!\n");
182 return AVERROR(EINVAL);
185 if (*args++ == ':' && (ret = av_set_options_string(movie, args, "=", ":")) < 0) {
186 av_log(ctx, AV_LOG_ERROR, "Error parsing options string: '%s'\n", args);
190 movie->seek_point = movie->seek_point_d * 1000000 + 0.5;
192 stream_specs = movie->stream_specs;
194 snprintf(default_streams, sizeof(default_streams), "d%c%d",
195 !strcmp(ctx->filter->name, "amovie") ? 'a' : 'v',
196 movie->stream_index);
197 stream_specs = default_streams;
199 for (cursor = stream_specs, nb_streams = 1; *cursor; cursor++)
203 if (movie->loop_count != 1 && nb_streams != 1) {
204 av_log(ctx, AV_LOG_ERROR,
205 "Loop with several streams is currently unsupported\n");
206 return AVERROR_PATCHWELCOME;
211 // Try to find the movie format (container)
212 iformat = movie->format_name ? av_find_input_format(movie->format_name) : NULL;
214 movie->format_ctx = NULL;
215 if ((ret = avformat_open_input(&movie->format_ctx, movie->file_name, iformat, NULL)) < 0) {
216 av_log(ctx, AV_LOG_ERROR,
217 "Failed to avformat_open_input '%s'\n", movie->file_name);
220 if ((ret = avformat_find_stream_info(movie->format_ctx, NULL)) < 0)
221 av_log(ctx, AV_LOG_WARNING, "Failed to find stream info\n");
223 // if seeking requested, we execute it
224 if (movie->seek_point > 0) {
225 timestamp = movie->seek_point;
226 // add the stream start time, should it exist
227 if (movie->format_ctx->start_time != AV_NOPTS_VALUE) {
228 if (timestamp > INT64_MAX - movie->format_ctx->start_time) {
229 av_log(ctx, AV_LOG_ERROR,
230 "%s: seek value overflow with start_time:%"PRId64" seek_point:%"PRId64"\n",
231 movie->file_name, movie->format_ctx->start_time, movie->seek_point);
232 return AVERROR(EINVAL);
234 timestamp += movie->format_ctx->start_time;
236 if ((ret = av_seek_frame(movie->format_ctx, -1, timestamp, AVSEEK_FLAG_BACKWARD)) < 0) {
237 av_log(ctx, AV_LOG_ERROR, "%s: could not seek to position %"PRId64"\n",
238 movie->file_name, timestamp);
243 for (i = 0; i < movie->format_ctx->nb_streams; i++)
244 movie->format_ctx->streams[i]->discard = AVDISCARD_ALL;
246 movie->st = av_calloc(nb_streams, sizeof(*movie->st));
248 return AVERROR(ENOMEM);
250 for (i = 0; i < nb_streams; i++) {
251 spec = av_strtok(stream_specs, "+", &cursor);
254 stream_specs = NULL; /* for next strtok */
255 st = find_stream(ctx, movie->format_ctx, spec);
257 return AVERROR(EINVAL);
258 st->discard = AVDISCARD_DEFAULT;
259 movie->st[i].st = st;
260 movie->max_stream_index = FFMAX(movie->max_stream_index, st->index);
262 if (av_strtok(NULL, "+", &cursor))
265 movie->out_index = av_calloc(movie->max_stream_index + 1,
266 sizeof(*movie->out_index));
267 if (!movie->out_index)
268 return AVERROR(ENOMEM);
269 for (i = 0; i <= movie->max_stream_index; i++)
270 movie->out_index[i] = -1;
271 for (i = 0; i < nb_streams; i++)
272 movie->out_index[movie->st[i].st->index] = i;
274 for (i = 0; i < nb_streams; i++) {
275 AVFilterPad pad = { 0 };
276 snprintf(name, sizeof(name), "out%d", i);
277 pad.type = movie->st[i].st->codec->codec_type;
278 pad.name = av_strdup(name);
279 pad.config_props = movie_config_output_props;
280 pad.request_frame = movie_request_frame;
281 ff_insert_outpad(ctx, i, &pad);
282 ret = open_stream(ctx, &movie->st[i]);
287 if (!(movie->frame = avcodec_alloc_frame()) ) {
288 av_log(log, AV_LOG_ERROR, "Failed to alloc frame\n");
289 return AVERROR(ENOMEM);
292 av_log(ctx, AV_LOG_VERBOSE, "seek_point:%"PRIi64" format_name:%s file_name:%s stream_index:%d\n",
293 movie->seek_point, movie->format_name, movie->file_name,
294 movie->stream_index);
299 static av_cold void movie_uninit(AVFilterContext *ctx)
301 MovieContext *movie = ctx->priv;
304 for (i = 0; i < ctx->nb_outputs; i++) {
305 av_freep(&ctx->output_pads[i].name);
307 avcodec_close(movie->st[i].st->codec);
310 av_freep(&movie->file_name);
311 av_freep(&movie->st);
312 av_freep(&movie->out_index);
313 av_freep(&movie->frame);
314 if (movie->format_ctx)
315 avformat_close_input(&movie->format_ctx);
318 static int movie_query_formats(AVFilterContext *ctx)
320 MovieContext *movie = ctx->priv;
321 int list[] = { 0, -1 };
322 int64_t list64[] = { 0, -1 };
325 for (i = 0; i < ctx->nb_outputs; i++) {
326 MovieStream *st = &movie->st[i];
327 AVCodecContext *c = st->st->codec;
328 AVFilterLink *outlink = ctx->outputs[i];
330 switch (c->codec_type) {
331 case AVMEDIA_TYPE_VIDEO:
332 list[0] = c->pix_fmt;
333 ff_formats_ref(ff_make_format_list(list), &outlink->in_formats);
335 case AVMEDIA_TYPE_AUDIO:
336 list[0] = c->sample_fmt;
337 ff_formats_ref(ff_make_format_list(list), &outlink->in_formats);
338 list[0] = c->sample_rate;
339 ff_formats_ref(ff_make_format_list(list), &outlink->in_samplerates);
340 list64[0] = c->channel_layout ? c->channel_layout :
341 av_get_default_channel_layout(c->channels);
342 ff_channel_layouts_ref(avfilter_make_format64_list(list64),
343 &outlink->in_channel_layouts);
351 static int movie_config_output_props(AVFilterLink *outlink)
353 AVFilterContext *ctx = outlink->src;
354 MovieContext *movie = ctx->priv;
355 unsigned out_id = FF_OUTLINK_IDX(outlink);
356 MovieStream *st = &movie->st[out_id];
357 AVCodecContext *c = st->st->codec;
359 outlink->time_base = st->st->time_base;
361 switch (c->codec_type) {
362 case AVMEDIA_TYPE_VIDEO:
363 outlink->w = c->width;
364 outlink->h = c->height;
365 outlink->frame_rate = st->st->r_frame_rate;
367 case AVMEDIA_TYPE_AUDIO:
374 static AVFilterBufferRef *frame_to_buf(enum AVMediaType type, AVFrame *frame,
375 AVFilterLink *outlink)
377 AVFilterBufferRef *buf, *copy;
379 buf = avfilter_get_buffer_ref_from_frame(type, frame,
385 buf->pts = av_frame_get_best_effort_timestamp(frame);
386 copy = ff_copy_buffer_ref(outlink, buf);
389 buf->buf->data[0] = NULL; /* it belongs to the frame */
390 avfilter_unref_buffer(buf);
394 static char *describe_bufref_to_str(char *dst, size_t dst_size,
395 AVFilterBufferRef *buf,
399 case AVMEDIA_TYPE_VIDEO:
400 snprintf(dst, dst_size,
401 "video pts:%s time:%s pos:%"PRId64" size:%dx%d aspect:%d/%d",
402 av_ts2str(buf->pts), av_ts2timestr(buf->pts, &link->time_base),
403 buf->pos, buf->video->w, buf->video->h,
404 buf->video->sample_aspect_ratio.num,
405 buf->video->sample_aspect_ratio.den);
407 case AVMEDIA_TYPE_AUDIO:
408 snprintf(dst, dst_size,
409 "audio pts:%s time:%s pos:%"PRId64" samples:%d",
410 av_ts2str(buf->pts), av_ts2timestr(buf->pts, &link->time_base),
411 buf->pos, buf->audio->nb_samples);
414 snprintf(dst, dst_size, "%s BUG", av_get_media_type_string(buf->type));
420 #define describe_bufref(buf, link) \
421 describe_bufref_to_str((char[1024]){0}, 1024, buf, link)
423 static int rewind_file(AVFilterContext *ctx)
425 MovieContext *movie = ctx->priv;
426 int64_t timestamp = movie->seek_point;
429 if (movie->format_ctx->start_time != AV_NOPTS_VALUE)
430 timestamp += movie->format_ctx->start_time;
431 ret = av_seek_frame(movie->format_ctx, -1, timestamp, AVSEEK_FLAG_BACKWARD);
433 av_log(ctx, AV_LOG_ERROR, "Unable to loop: %s\n", av_err2str(ret));
434 movie->loop_count = 1; /* do not try again */
438 for (i = 0; i < ctx->nb_outputs; i++) {
439 avcodec_flush_buffers(movie->st[i].st->codec);
440 movie->st[i].done = 0;
447 * Try to push a frame to the requested output.
449 * @return 1 if a frame was pushed on the requested output,
450 * 0 if another attempt is possible,
453 static int movie_push_frame(AVFilterContext *ctx, unsigned out_id)
455 MovieContext *movie = ctx->priv;
456 AVPacket *pkt = &movie->pkt;
458 int ret, got_frame = 0, pkt_out_id;
459 AVFilterLink *outlink;
460 AVFilterBufferRef *buf;
464 if (movie->st[out_id].done) {
465 if (movie->loop_count != 1) {
466 ret = rewind_file(ctx);
469 movie->loop_count -= movie->loop_count > 1;
470 av_log(ctx, AV_LOG_VERBOSE, "Stream finished, looping.\n");
471 return 0; /* retry */
475 /* packet is already ready for flushing */
477 ret = av_read_frame(movie->format_ctx, &movie->pkt0);
479 av_init_packet(&movie->pkt0); /* ready for flushing */
481 if (ret == AVERROR_EOF) {
483 return 0; /* start flushing */
491 pkt_out_id = pkt->stream_index > movie->max_stream_index ? -1 :
492 movie->out_index[pkt->stream_index];
493 if (pkt_out_id < 0) {
494 av_free_packet(&movie->pkt0);
495 pkt->size = 0; /* ready for next run */
499 st = &movie->st[pkt_out_id];
500 outlink = ctx->outputs[pkt_out_id];
502 switch (st->st->codec->codec_type) {
503 case AVMEDIA_TYPE_VIDEO:
504 ret = avcodec_decode_video2(st->st->codec, movie->frame, &got_frame, pkt);
506 case AVMEDIA_TYPE_AUDIO:
507 ret = avcodec_decode_audio4(st->st->codec, movie->frame, &got_frame, pkt);
510 ret = AVERROR(ENOSYS);
514 av_log(ctx, AV_LOG_WARNING, "Decode error: %s\n", av_err2str(ret));
522 if (pkt->size <= 0) {
523 av_free_packet(&movie->pkt0);
524 pkt->size = 0; /* ready for next run */
533 buf = frame_to_buf(st->st->codec->codec_type, movie->frame, outlink);
535 return AVERROR(ENOMEM);
536 av_dlog(ctx, "movie_push_frame(): file:'%s' %s\n", movie->file_name,
537 describe_bufref(buf, outlink));
538 switch (st->st->codec->codec_type) {
539 case AVMEDIA_TYPE_VIDEO:
540 if (!movie->frame->sample_aspect_ratio.num)
541 buf->video->sample_aspect_ratio = st->st->sample_aspect_ratio;
542 ff_start_frame(outlink, buf);
543 ff_draw_slice(outlink, 0, outlink->h, 1);
544 ff_end_frame(outlink);
546 case AVMEDIA_TYPE_AUDIO:
547 ff_filter_samples(outlink, buf);
551 return pkt_out_id == out_id;
554 static int movie_request_frame(AVFilterLink *outlink)
556 AVFilterContext *ctx = outlink->src;
557 unsigned out_id = FF_OUTLINK_IDX(outlink);
561 ret = movie_push_frame(ctx, out_id);
563 return FFMIN(ret, 0);
567 #if CONFIG_MOVIE_FILTER
569 AVFilter avfilter_avsrc_movie = {
571 .description = NULL_IF_CONFIG_SMALL("Read from a movie source."),
572 .priv_size = sizeof(MovieContext),
574 .uninit = movie_uninit,
575 .query_formats = movie_query_formats,
577 .inputs = (const AVFilterPad[]) {{ .name = NULL }},
578 .outputs = (const AVFilterPad[]) {{ .name = NULL }},
581 #endif /* CONFIG_MOVIE_FILTER */
583 #if CONFIG_AMOVIE_FILTER
585 AVFilter avfilter_avsrc_amovie = {
587 .description = NULL_IF_CONFIG_SMALL("Read audio from a movie source."),
588 .priv_size = sizeof(MovieContext),
590 .uninit = movie_uninit,
591 .query_formats = movie_query_formats,
593 .inputs = (const AVFilterPad[]) {{ .name = NULL }},
594 .outputs = (const AVFilterPad[]) {{ .name = NULL }},
597 #endif /* CONFIG_AMOVIE_FILTER */