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 #include <stdint.h>
32
33 #include "libavutil/attributes.h"
34 #include "libavutil/avstring.h"
35 #include "libavutil/avassert.h"
36 #include "libavutil/opt.h"
37 #include "libavutil/imgutils.h"
38 #include "libavutil/internal.h"
39 #include "libavutil/timestamp.h"
40
41 #include "libavcodec/avcodec.h"
42
43 #include "libavformat/avformat.h"
44
45 #include "audio.h"
46 #include "avfilter.h"
47 #include "formats.h"
48 #include "internal.h"
49 #include "video.h"
50
51 typedef struct MovieStream {
52 AVStream *st;
53 AVCodecContext *codec_ctx;
54 int done;
55 int64_t discontinuity_threshold;
56 int64_t last_pts;
57 } MovieStream;
58
59 typedef struct MovieContext {
60 /* common A/V fields */
61 const AVClass *class;
62 int64_t seek_point; ///< seekpoint in microseconds
63 double seek_point_d;
64 char *format_name;
65 char *file_name;
66 char *stream_specs; /**< user-provided list of streams, separated by + */
67 int stream_index; /**< for compatibility */
68 int loop_count;
69 int64_t discontinuity_threshold;
70 int64_t ts_offset;
71
72 AVFormatContext *format_ctx;
73 int eof;
74 AVPacket pkt, pkt0;
75
76 int max_stream_index; /**< max stream # actually used for output */
77 MovieStream *st; /**< array of all streams, one per output */
78 int *out_index; /**< stream number -> output number map, or -1 */
79 } MovieContext;
80
81 #define OFFSET(x) offsetof(MovieContext, x)
82 #define FLAGS AV_OPT_FLAG_FILTERING_PARAM | AV_OPT_FLAG_AUDIO_PARAM | AV_OPT_FLAG_VIDEO_PARAM
83
84 static const AVOption movie_options[]= {
85 { "filename", NULL, OFFSET(file_name), AV_OPT_TYPE_STRING, .flags = FLAGS },
86 { "format_name", "set format name", OFFSET(format_name), AV_OPT_TYPE_STRING, .flags = FLAGS },
87 { "f", "set format name", OFFSET(format_name), AV_OPT_TYPE_STRING, .flags = FLAGS },
88 { "stream_index", "set stream index", OFFSET(stream_index), AV_OPT_TYPE_INT, { .i64 = -1 }, -1, INT_MAX, FLAGS },
89 { "si", "set stream index", OFFSET(stream_index), AV_OPT_TYPE_INT, { .i64 = -1 }, -1, INT_MAX, FLAGS },
90 { "seek_point", "set seekpoint (seconds)", OFFSET(seek_point_d), AV_OPT_TYPE_DOUBLE, { .dbl = 0 }, 0, (INT64_MAX-1) / 1000000, FLAGS },
91 { "sp", "set seekpoint (seconds)", OFFSET(seek_point_d), AV_OPT_TYPE_DOUBLE, { .dbl = 0 }, 0, (INT64_MAX-1) / 1000000, FLAGS },
92 { "streams", "set streams", OFFSET(stream_specs), AV_OPT_TYPE_STRING, {.str = 0}, 0, 0, FLAGS },
93 { "s", "set streams", OFFSET(stream_specs), AV_OPT_TYPE_STRING, {.str = 0}, 0, 0, FLAGS },
94 { "loop", "set loop count", OFFSET(loop_count), AV_OPT_TYPE_INT, {.i64 = 1}, 0, INT_MAX, FLAGS },
95 { "discontinuity", "set discontinuity threshold", OFFSET(discontinuity_threshold), AV_OPT_TYPE_DURATION, {.i64 = 0}, 0, INT64_MAX, FLAGS },
96 { NULL },
97 };
98
99 static int movie_config_output_props(AVFilterLink *outlink);
100 static int movie_request_frame(AVFilterLink *outlink);
101
find_stream(void * log,AVFormatContext * avf,const char * spec)102 static AVStream *find_stream(void *log, AVFormatContext *avf, const char *spec)
103 {
104 int i, ret, already = 0, stream_id = -1;
105 char type_char[2], dummy;
106 AVStream *found = NULL;
107 enum AVMediaType type;
108
109 ret = sscanf(spec, "d%1[av]%d%c", type_char, &stream_id, &dummy);
110 if (ret >= 1 && ret <= 2) {
111 type = type_char[0] == 'v' ? AVMEDIA_TYPE_VIDEO : AVMEDIA_TYPE_AUDIO;
112 ret = av_find_best_stream(avf, type, stream_id, -1, NULL, 0);
113 if (ret < 0) {
114 av_log(log, AV_LOG_ERROR, "No %s stream with index '%d' found\n",
115 av_get_media_type_string(type), stream_id);
116 return NULL;
117 }
118 return avf->streams[ret];
119 }
120 for (i = 0; i < avf->nb_streams; i++) {
121 ret = avformat_match_stream_specifier(avf, avf->streams[i], spec);
122 if (ret < 0) {
123 av_log(log, AV_LOG_ERROR,
124 "Invalid stream specifier \"%s\"\n", spec);
125 return NULL;
126 }
127 if (!ret)
128 continue;
129 if (avf->streams[i]->discard != AVDISCARD_ALL) {
130 already++;
131 continue;
132 }
133 if (found) {
134 av_log(log, AV_LOG_WARNING,
135 "Ambiguous stream specifier \"%s\", using #%d\n", spec, i);
136 break;
137 }
138 found = avf->streams[i];
139 }
140 if (!found) {
141 av_log(log, AV_LOG_WARNING, "Stream specifier \"%s\" %s\n", spec,
142 already ? "matched only already used streams" :
143 "did not match any stream");
144 return NULL;
145 }
146 if (found->codecpar->codec_type != AVMEDIA_TYPE_VIDEO &&
147 found->codecpar->codec_type != AVMEDIA_TYPE_AUDIO) {
148 av_log(log, AV_LOG_ERROR, "Stream specifier \"%s\" matched a %s stream,"
149 "currently unsupported by libavfilter\n", spec,
150 av_get_media_type_string(found->codecpar->codec_type));
151 return NULL;
152 }
153 return found;
154 }
155
open_stream(AVFilterContext * ctx,MovieStream * st)156 static int open_stream(AVFilterContext *ctx, MovieStream *st)
157 {
158 AVCodec *codec;
159 int ret;
160
161 codec = avcodec_find_decoder(st->st->codecpar->codec_id);
162 if (!codec) {
163 av_log(ctx, AV_LOG_ERROR, "Failed to find any codec\n");
164 return AVERROR(EINVAL);
165 }
166
167 st->codec_ctx = avcodec_alloc_context3(codec);
168 if (!st->codec_ctx)
169 return AVERROR(ENOMEM);
170
171 ret = avcodec_parameters_to_context(st->codec_ctx, st->st->codecpar);
172 if (ret < 0)
173 return ret;
174
175 st->codec_ctx->refcounted_frames = 1;
176 st->codec_ctx->thread_count = ff_filter_get_nb_threads(ctx);
177
178 if ((ret = avcodec_open2(st->codec_ctx, codec, NULL)) < 0) {
179 av_log(ctx, AV_LOG_ERROR, "Failed to open codec\n");
180 return ret;
181 }
182
183 return 0;
184 }
185
guess_channel_layout(MovieStream * st,int st_index,void * log_ctx)186 static int guess_channel_layout(MovieStream *st, int st_index, void *log_ctx)
187 {
188 AVCodecParameters *dec_par = st->st->codecpar;
189 char buf[256];
190 int64_t chl = av_get_default_channel_layout(dec_par->channels);
191
192 if (!chl) {
193 av_log(log_ctx, AV_LOG_ERROR,
194 "Channel layout is not set in stream %d, and could not "
195 "be guessed from the number of channels (%d)\n",
196 st_index, dec_par->channels);
197 return AVERROR(EINVAL);
198 }
199
200 av_get_channel_layout_string(buf, sizeof(buf), dec_par->channels, chl);
201 av_log(log_ctx, AV_LOG_WARNING,
202 "Channel layout is not set in output stream %d, "
203 "guessed channel layout is '%s'\n",
204 st_index, buf);
205 dec_par->channel_layout = chl;
206 return 0;
207 }
208
movie_common_init(AVFilterContext * ctx)209 static av_cold int movie_common_init(AVFilterContext *ctx)
210 {
211 MovieContext *movie = ctx->priv;
212 AVInputFormat *iformat = NULL;
213 int64_t timestamp;
214 int nb_streams = 1, ret, i;
215 char default_streams[16], *stream_specs, *spec, *cursor;
216 char name[16];
217 AVStream *st;
218
219 if (!movie->file_name) {
220 av_log(ctx, AV_LOG_ERROR, "No filename provided!\n");
221 return AVERROR(EINVAL);
222 }
223
224 movie->seek_point = movie->seek_point_d * 1000000 + 0.5;
225
226 stream_specs = movie->stream_specs;
227 if (!stream_specs) {
228 snprintf(default_streams, sizeof(default_streams), "d%c%d",
229 !strcmp(ctx->filter->name, "amovie") ? 'a' : 'v',
230 movie->stream_index);
231 stream_specs = default_streams;
232 }
233 for (cursor = stream_specs; *cursor; cursor++)
234 if (*cursor == '+')
235 nb_streams++;
236
237 if (movie->loop_count != 1 && nb_streams != 1) {
238 av_log(ctx, AV_LOG_ERROR,
239 "Loop with several streams is currently unsupported\n");
240 return AVERROR_PATCHWELCOME;
241 }
242
243 // Try to find the movie format (container)
244 iformat = movie->format_name ? av_find_input_format(movie->format_name) : NULL;
245
246 movie->format_ctx = NULL;
247 if ((ret = avformat_open_input(&movie->format_ctx, movie->file_name, iformat, NULL)) < 0) {
248 av_log(ctx, AV_LOG_ERROR,
249 "Failed to avformat_open_input '%s'\n", movie->file_name);
250 return ret;
251 }
252 if ((ret = avformat_find_stream_info(movie->format_ctx, NULL)) < 0)
253 av_log(ctx, AV_LOG_WARNING, "Failed to find stream info\n");
254
255 // if seeking requested, we execute it
256 if (movie->seek_point > 0) {
257 timestamp = movie->seek_point;
258 // add the stream start time, should it exist
259 if (movie->format_ctx->start_time != AV_NOPTS_VALUE) {
260 if (timestamp > 0 && movie->format_ctx->start_time > INT64_MAX - timestamp) {
261 av_log(ctx, AV_LOG_ERROR,
262 "%s: seek value overflow with start_time:%"PRId64" seek_point:%"PRId64"\n",
263 movie->file_name, movie->format_ctx->start_time, movie->seek_point);
264 return AVERROR(EINVAL);
265 }
266 timestamp += movie->format_ctx->start_time;
267 }
268 if ((ret = av_seek_frame(movie->format_ctx, -1, timestamp, AVSEEK_FLAG_BACKWARD)) < 0) {
269 av_log(ctx, AV_LOG_ERROR, "%s: could not seek to position %"PRId64"\n",
270 movie->file_name, timestamp);
271 return ret;
272 }
273 }
274
275 for (i = 0; i < movie->format_ctx->nb_streams; i++)
276 movie->format_ctx->streams[i]->discard = AVDISCARD_ALL;
277
278 movie->st = av_calloc(nb_streams, sizeof(*movie->st));
279 if (!movie->st)
280 return AVERROR(ENOMEM);
281
282 for (i = 0; i < nb_streams; i++) {
283 spec = av_strtok(stream_specs, "+", &cursor);
284 if (!spec)
285 return AVERROR_BUG;
286 stream_specs = NULL; /* for next strtok */
287 st = find_stream(ctx, movie->format_ctx, spec);
288 if (!st)
289 return AVERROR(EINVAL);
290 st->discard = AVDISCARD_DEFAULT;
291 movie->st[i].st = st;
292 movie->max_stream_index = FFMAX(movie->max_stream_index, st->index);
293 movie->st[i].discontinuity_threshold =
294 av_rescale_q(movie->discontinuity_threshold, AV_TIME_BASE_Q, st->time_base);
295 }
296 if (av_strtok(NULL, "+", &cursor))
297 return AVERROR_BUG;
298
299 movie->out_index = av_calloc(movie->max_stream_index + 1,
300 sizeof(*movie->out_index));
301 if (!movie->out_index)
302 return AVERROR(ENOMEM);
303 for (i = 0; i <= movie->max_stream_index; i++)
304 movie->out_index[i] = -1;
305 for (i = 0; i < nb_streams; i++) {
306 AVFilterPad pad = { 0 };
307 movie->out_index[movie->st[i].st->index] = i;
308 snprintf(name, sizeof(name), "out%d", i);
309 pad.type = movie->st[i].st->codecpar->codec_type;
310 pad.name = av_strdup(name);
311 if (!pad.name)
312 return AVERROR(ENOMEM);
313 pad.config_props = movie_config_output_props;
314 pad.request_frame = movie_request_frame;
315 if ((ret = ff_insert_outpad(ctx, i, &pad)) < 0) {
316 av_freep(&pad.name);
317 return ret;
318 }
319 if ( movie->st[i].st->codecpar->codec_type == AVMEDIA_TYPE_AUDIO &&
320 !movie->st[i].st->codecpar->channel_layout) {
321 ret = guess_channel_layout(&movie->st[i], i, ctx);
322 if (ret < 0)
323 return ret;
324 }
325 ret = open_stream(ctx, &movie->st[i]);
326 if (ret < 0)
327 return ret;
328 }
329
330 av_log(ctx, AV_LOG_VERBOSE, "seek_point:%"PRIi64" format_name:%s file_name:%s stream_index:%d\n",
331 movie->seek_point, movie->format_name, movie->file_name,
332 movie->stream_index);
333
334 return 0;
335 }
336
movie_uninit(AVFilterContext * ctx)337 static av_cold void movie_uninit(AVFilterContext *ctx)
338 {
339 MovieContext *movie = ctx->priv;
340 int i;
341
342 for (i = 0; i < ctx->nb_outputs; i++) {
343 av_freep(&ctx->output_pads[i].name);
344 if (movie->st[i].st)
345 avcodec_free_context(&movie->st[i].codec_ctx);
346 }
347 av_freep(&movie->st);
348 av_freep(&movie->out_index);
349 if (movie->format_ctx)
350 avformat_close_input(&movie->format_ctx);
351 }
352
movie_query_formats(AVFilterContext * ctx)353 static int movie_query_formats(AVFilterContext *ctx)
354 {
355 MovieContext *movie = ctx->priv;
356 int list[] = { 0, -1 };
357 int64_t list64[] = { 0, -1 };
358 int i, ret;
359
360 for (i = 0; i < ctx->nb_outputs; i++) {
361 MovieStream *st = &movie->st[i];
362 AVCodecParameters *c = st->st->codecpar;
363 AVFilterLink *outlink = ctx->outputs[i];
364
365 switch (c->codec_type) {
366 case AVMEDIA_TYPE_VIDEO:
367 list[0] = c->format;
368 if ((ret = ff_formats_ref(ff_make_format_list(list), &outlink->in_formats)) < 0)
369 return ret;
370 break;
371 case AVMEDIA_TYPE_AUDIO:
372 list[0] = c->format;
373 if ((ret = ff_formats_ref(ff_make_format_list(list), &outlink->in_formats)) < 0)
374 return ret;
375 list[0] = c->sample_rate;
376 if ((ret = ff_formats_ref(ff_make_format_list(list), &outlink->in_samplerates)) < 0)
377 return ret;
378 list64[0] = c->channel_layout;
379 if ((ret = ff_channel_layouts_ref(avfilter_make_format64_list(list64),
380 &outlink->in_channel_layouts)) < 0)
381 return ret;
382 break;
383 }
384 }
385
386 return 0;
387 }
388
movie_config_output_props(AVFilterLink * outlink)389 static int movie_config_output_props(AVFilterLink *outlink)
390 {
391 AVFilterContext *ctx = outlink->src;
392 MovieContext *movie = ctx->priv;
393 unsigned out_id = FF_OUTLINK_IDX(outlink);
394 MovieStream *st = &movie->st[out_id];
395 AVCodecParameters *c = st->st->codecpar;
396
397 outlink->time_base = st->st->time_base;
398
399 switch (c->codec_type) {
400 case AVMEDIA_TYPE_VIDEO:
401 outlink->w = c->width;
402 outlink->h = c->height;
403 outlink->frame_rate = st->st->r_frame_rate;
404 break;
405 case AVMEDIA_TYPE_AUDIO:
406 break;
407 }
408
409 return 0;
410 }
411
describe_frame_to_str(char * dst,size_t dst_size,AVFrame * frame,enum AVMediaType frame_type,AVFilterLink * link)412 static char *describe_frame_to_str(char *dst, size_t dst_size,
413 AVFrame *frame, enum AVMediaType frame_type,
414 AVFilterLink *link)
415 {
416 switch (frame_type) {
417 case AVMEDIA_TYPE_VIDEO:
418 snprintf(dst, dst_size,
419 "video pts:%s time:%s size:%dx%d aspect:%d/%d",
420 av_ts2str(frame->pts), av_ts2timestr(frame->pts, &link->time_base),
421 frame->width, frame->height,
422 frame->sample_aspect_ratio.num,
423 frame->sample_aspect_ratio.den);
424 break;
425 case AVMEDIA_TYPE_AUDIO:
426 snprintf(dst, dst_size,
427 "audio pts:%s time:%s samples:%d",
428 av_ts2str(frame->pts), av_ts2timestr(frame->pts, &link->time_base),
429 frame->nb_samples);
430 break;
431 default:
432 snprintf(dst, dst_size, "%s BUG", av_get_media_type_string(frame_type));
433 break;
434 }
435 return dst;
436 }
437
rewind_file(AVFilterContext * ctx)438 static int rewind_file(AVFilterContext *ctx)
439 {
440 MovieContext *movie = ctx->priv;
441 int64_t timestamp = movie->seek_point;
442 int ret, i;
443
444 if (movie->format_ctx->start_time != AV_NOPTS_VALUE)
445 timestamp += movie->format_ctx->start_time;
446 ret = av_seek_frame(movie->format_ctx, -1, timestamp, AVSEEK_FLAG_BACKWARD);
447 if (ret < 0) {
448 av_log(ctx, AV_LOG_ERROR, "Unable to loop: %s\n", av_err2str(ret));
449 movie->loop_count = 1; /* do not try again */
450 return ret;
451 }
452
453 for (i = 0; i < ctx->nb_outputs; i++) {
454 avcodec_flush_buffers(movie->st[i].codec_ctx);
455 movie->st[i].done = 0;
456 }
457 movie->eof = 0;
458 return 0;
459 }
460
461 /**
462 * Try to push a frame to the requested output.
463 *
464 * @param ctx filter context
465 * @param out_id number of output where a frame is wanted;
466 * if the frame is read from file, used to set the return value;
467 * if the codec is being flushed, flush the corresponding stream
468 * @return 1 if a frame was pushed on the requested output,
469 * 0 if another attempt is possible,
470 * <0 AVERROR code
471 */
movie_push_frame(AVFilterContext * ctx,unsigned out_id)472 static int movie_push_frame(AVFilterContext *ctx, unsigned out_id)
473 {
474 MovieContext *movie = ctx->priv;
475 AVPacket *pkt = &movie->pkt;
476 enum AVMediaType frame_type;
477 MovieStream *st;
478 int ret, got_frame = 0, pkt_out_id;
479 AVFilterLink *outlink;
480 AVFrame *frame;
481
482 if (!pkt->size) {
483 if (movie->eof) {
484 if (movie->st[out_id].done) {
485 if (movie->loop_count != 1) {
486 ret = rewind_file(ctx);
487 if (ret < 0)
488 return ret;
489 movie->loop_count -= movie->loop_count > 1;
490 av_log(ctx, AV_LOG_VERBOSE, "Stream finished, looping.\n");
491 return 0; /* retry */
492 }
493 return AVERROR_EOF;
494 }
495 pkt->stream_index = movie->st[out_id].st->index;
496 /* packet is already ready for flushing */
497 } else {
498 ret = av_read_frame(movie->format_ctx, &movie->pkt0);
499 if (ret < 0) {
500 av_init_packet(&movie->pkt0); /* ready for flushing */
501 *pkt = movie->pkt0;
502 if (ret == AVERROR_EOF) {
503 movie->eof = 1;
504 return 0; /* start flushing */
505 }
506 return ret;
507 }
508 *pkt = movie->pkt0;
509 }
510 }
511
512 pkt_out_id = pkt->stream_index > movie->max_stream_index ? -1 :
513 movie->out_index[pkt->stream_index];
514 if (pkt_out_id < 0) {
515 av_packet_unref(&movie->pkt0);
516 pkt->size = 0; /* ready for next run */
517 pkt->data = NULL;
518 return 0;
519 }
520 st = &movie->st[pkt_out_id];
521 outlink = ctx->outputs[pkt_out_id];
522
523 frame = av_frame_alloc();
524 if (!frame)
525 return AVERROR(ENOMEM);
526
527 frame_type = st->st->codecpar->codec_type;
528 switch (frame_type) {
529 case AVMEDIA_TYPE_VIDEO:
530 ret = avcodec_decode_video2(st->codec_ctx, frame, &got_frame, pkt);
531 break;
532 case AVMEDIA_TYPE_AUDIO:
533 ret = avcodec_decode_audio4(st->codec_ctx, frame, &got_frame, pkt);
534 break;
535 default:
536 ret = AVERROR(ENOSYS);
537 break;
538 }
539 if (ret < 0) {
540 av_log(ctx, AV_LOG_WARNING, "Decode error: %s\n", av_err2str(ret));
541 av_frame_free(&frame);
542 av_packet_unref(&movie->pkt0);
543 movie->pkt.size = 0;
544 movie->pkt.data = NULL;
545 return 0;
546 }
547 if (!ret || st->st->codecpar->codec_type == AVMEDIA_TYPE_VIDEO)
548 ret = pkt->size;
549
550 pkt->data += ret;
551 pkt->size -= ret;
552 if (pkt->size <= 0) {
553 av_packet_unref(&movie->pkt0);
554 pkt->size = 0; /* ready for next run */
555 pkt->data = NULL;
556 }
557 if (!got_frame) {
558 if (!ret)
559 st->done = 1;
560 av_frame_free(&frame);
561 return 0;
562 }
563
564 frame->pts = frame->best_effort_timestamp;
565 if (frame->pts != AV_NOPTS_VALUE) {
566 if (movie->ts_offset)
567 frame->pts += av_rescale_q_rnd(movie->ts_offset, AV_TIME_BASE_Q, outlink->time_base, AV_ROUND_UP);
568 if (st->discontinuity_threshold) {
569 if (st->last_pts != AV_NOPTS_VALUE) {
570 int64_t diff = frame->pts - st->last_pts;
571 if (diff < 0 || diff > st->discontinuity_threshold) {
572 av_log(ctx, AV_LOG_VERBOSE, "Discontinuity in stream:%d diff:%"PRId64"\n", pkt_out_id, diff);
573 movie->ts_offset += av_rescale_q_rnd(-diff, outlink->time_base, AV_TIME_BASE_Q, AV_ROUND_UP);
574 frame->pts -= diff;
575 }
576 }
577 }
578 st->last_pts = frame->pts;
579 }
580 ff_dlog(ctx, "movie_push_frame(): file:'%s' %s\n", movie->file_name,
581 describe_frame_to_str((char[1024]){0}, 1024, frame, frame_type, outlink));
582
583 if (st->st->codecpar->codec_type == AVMEDIA_TYPE_VIDEO) {
584 if (frame->format != outlink->format) {
585 av_log(ctx, AV_LOG_ERROR, "Format changed %s -> %s, discarding frame\n",
586 av_get_pix_fmt_name(outlink->format),
587 av_get_pix_fmt_name(frame->format)
588 );
589 av_frame_free(&frame);
590 return 0;
591 }
592 }
593 ret = ff_filter_frame(outlink, frame);
594
595 if (ret < 0)
596 return ret;
597 return pkt_out_id == out_id;
598 }
599
movie_request_frame(AVFilterLink * outlink)600 static int movie_request_frame(AVFilterLink *outlink)
601 {
602 AVFilterContext *ctx = outlink->src;
603 unsigned out_id = FF_OUTLINK_IDX(outlink);
604 int ret;
605
606 while (1) {
607 ret = movie_push_frame(ctx, out_id);
608 if (ret)
609 return FFMIN(ret, 0);
610 }
611 }
612
process_command(AVFilterContext * ctx,const char * cmd,const char * args,char * res,int res_len,int flags)613 static int process_command(AVFilterContext *ctx, const char *cmd, const char *args,
614 char *res, int res_len, int flags)
615 {
616 MovieContext *movie = ctx->priv;
617 int ret = AVERROR(ENOSYS);
618
619 if (!strcmp(cmd, "seek")) {
620 int idx, flags, i;
621 int64_t ts;
622 char tail[2];
623
624 if (sscanf(args, "%i|%"SCNi64"|%i %1s", &idx, &ts, &flags, tail) != 3)
625 return AVERROR(EINVAL);
626
627 ret = av_seek_frame(movie->format_ctx, idx, ts, flags);
628 if (ret < 0)
629 return ret;
630
631 for (i = 0; i < ctx->nb_outputs; i++) {
632 avcodec_flush_buffers(movie->st[i].codec_ctx);
633 movie->st[i].done = 0;
634 }
635 return ret;
636 } else if (!strcmp(cmd, "get_duration")) {
637 int print_len;
638 char tail[2];
639
640 if (!res || res_len <= 0)
641 return AVERROR(EINVAL);
642
643 if (args && sscanf(args, "%1s", tail) == 1)
644 return AVERROR(EINVAL);
645
646 print_len = snprintf(res, res_len, "%"PRId64, movie->format_ctx->duration);
647 if (print_len < 0 || print_len >= res_len)
648 return AVERROR(EINVAL);
649
650 return 0;
651 }
652
653 return ret;
654 }
655
656 #if CONFIG_MOVIE_FILTER
657
658 AVFILTER_DEFINE_CLASS(movie);
659
660 AVFilter ff_avsrc_movie = {
661 .name = "movie",
662 .description = NULL_IF_CONFIG_SMALL("Read from a movie source."),
663 .priv_size = sizeof(MovieContext),
664 .priv_class = &movie_class,
665 .init = movie_common_init,
666 .uninit = movie_uninit,
667 .query_formats = movie_query_formats,
668
669 .inputs = NULL,
670 .outputs = NULL,
671 .flags = AVFILTER_FLAG_DYNAMIC_OUTPUTS,
672 .process_command = process_command
673 };
674
675 #endif /* CONFIG_MOVIE_FILTER */
676
677 #if CONFIG_AMOVIE_FILTER
678
679 #define amovie_options movie_options
680 AVFILTER_DEFINE_CLASS(amovie);
681
682 AVFilter ff_avsrc_amovie = {
683 .name = "amovie",
684 .description = NULL_IF_CONFIG_SMALL("Read audio from a movie source."),
685 .priv_size = sizeof(MovieContext),
686 .init = movie_common_init,
687 .uninit = movie_uninit,
688 .query_formats = movie_query_formats,
689
690 .inputs = NULL,
691 .outputs = NULL,
692 .priv_class = &amovie_class,
693 .flags = AVFILTER_FLAG_DYNAMIC_OUTPUTS,
694 .process_command = process_command,
695 };
696
697 #endif /* CONFIG_AMOVIE_FILTER */
698