summaryrefslogtreecommitdiff
path: root/libavfilter/src_movie.c (plain)
blob: 23dcb7ba2e34aa9df94f149b03c8a97e7a96e059
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#include "libavformat/avformat.h"
41#include "audio.h"
42#include "avfilter.h"
43#include "formats.h"
44#include "internal.h"
45#include "video.h"
46
47typedef struct MovieStream {
48 AVStream *st;
49 AVCodecContext *codec_ctx;
50 int done;
51 int64_t discontinuity_threshold;
52 int64_t last_pts;
53} MovieStream;
54
55typedef struct MovieContext {
56 /* common A/V fields */
57 const AVClass *class;
58 int64_t seek_point; ///< seekpoint in microseconds
59 double seek_point_d;
60 char *format_name;
61 char *file_name;
62 char *stream_specs; /**< user-provided list of streams, separated by + */
63 int stream_index; /**< for compatibility */
64 int loop_count;
65 int64_t discontinuity_threshold;
66 int64_t ts_offset;
67
68 AVFormatContext *format_ctx;
69 int eof;
70 AVPacket pkt, pkt0;
71
72 int max_stream_index; /**< max stream # actually used for output */
73 MovieStream *st; /**< array of all streams, one per output */
74 int *out_index; /**< stream number -> output number map, or -1 */
75} MovieContext;
76
77#define OFFSET(x) offsetof(MovieContext, x)
78#define FLAGS AV_OPT_FLAG_FILTERING_PARAM | AV_OPT_FLAG_AUDIO_PARAM | AV_OPT_FLAG_VIDEO_PARAM
79
80static const AVOption movie_options[]= {
81 { "filename", NULL, OFFSET(file_name), AV_OPT_TYPE_STRING, .flags = FLAGS },
82 { "format_name", "set format name", OFFSET(format_name), AV_OPT_TYPE_STRING, .flags = FLAGS },
83 { "f", "set format name", OFFSET(format_name), AV_OPT_TYPE_STRING, .flags = FLAGS },
84 { "stream_index", "set stream index", OFFSET(stream_index), AV_OPT_TYPE_INT, { .i64 = -1 }, -1, INT_MAX, FLAGS },
85 { "si", "set stream index", OFFSET(stream_index), AV_OPT_TYPE_INT, { .i64 = -1 }, -1, INT_MAX, FLAGS },
86 { "seek_point", "set seekpoint (seconds)", OFFSET(seek_point_d), AV_OPT_TYPE_DOUBLE, { .dbl = 0 }, 0, (INT64_MAX-1) / 1000000, FLAGS },
87 { "sp", "set seekpoint (seconds)", OFFSET(seek_point_d), AV_OPT_TYPE_DOUBLE, { .dbl = 0 }, 0, (INT64_MAX-1) / 1000000, FLAGS },
88 { "streams", "set streams", OFFSET(stream_specs), AV_OPT_TYPE_STRING, {.str = 0}, CHAR_MAX, CHAR_MAX, FLAGS },
89 { "s", "set streams", OFFSET(stream_specs), AV_OPT_TYPE_STRING, {.str = 0}, CHAR_MAX, CHAR_MAX, FLAGS },
90 { "loop", "set loop count", OFFSET(loop_count), AV_OPT_TYPE_INT, {.i64 = 1}, 0, INT_MAX, FLAGS },
91 { "discontinuity", "set discontinuity threshold", OFFSET(discontinuity_threshold), AV_OPT_TYPE_DURATION, {.i64 = 0}, 0, INT64_MAX, FLAGS },
92 { NULL },
93};
94
95static int movie_config_output_props(AVFilterLink *outlink);
96static int movie_request_frame(AVFilterLink *outlink);
97
98static AVStream *find_stream(void *log, AVFormatContext *avf, const char *spec)
99{
100 int i, ret, already = 0, stream_id = -1;
101 char type_char[2], dummy;
102 AVStream *found = NULL;
103 enum AVMediaType type;
104
105 ret = sscanf(spec, "d%1[av]%d%c", type_char, &stream_id, &dummy);
106 if (ret >= 1 && ret <= 2) {
107 type = type_char[0] == 'v' ? AVMEDIA_TYPE_VIDEO : AVMEDIA_TYPE_AUDIO;
108 ret = av_find_best_stream(avf, type, stream_id, -1, NULL, 0);
109 if (ret < 0) {
110 av_log(log, AV_LOG_ERROR, "No %s stream with index '%d' found\n",
111 av_get_media_type_string(type), stream_id);
112 return NULL;
113 }
114 return avf->streams[ret];
115 }
116 for (i = 0; i < avf->nb_streams; i++) {
117 ret = avformat_match_stream_specifier(avf, avf->streams[i], spec);
118 if (ret < 0) {
119 av_log(log, AV_LOG_ERROR,
120 "Invalid stream specifier \"%s\"\n", spec);
121 return NULL;
122 }
123 if (!ret)
124 continue;
125 if (avf->streams[i]->discard != AVDISCARD_ALL) {
126 already++;
127 continue;
128 }
129 if (found) {
130 av_log(log, AV_LOG_WARNING,
131 "Ambiguous stream specifier \"%s\", using #%d\n", spec, i);
132 break;
133 }
134 found = avf->streams[i];
135 }
136 if (!found) {
137 av_log(log, AV_LOG_WARNING, "Stream specifier \"%s\" %s\n", spec,
138 already ? "matched only already used streams" :
139 "did not match any stream");
140 return NULL;
141 }
142 if (found->codecpar->codec_type != AVMEDIA_TYPE_VIDEO &&
143 found->codecpar->codec_type != AVMEDIA_TYPE_AUDIO) {
144 av_log(log, AV_LOG_ERROR, "Stream specifier \"%s\" matched a %s stream,"
145 "currently unsupported by libavfilter\n", spec,
146 av_get_media_type_string(found->codecpar->codec_type));
147 return NULL;
148 }
149 return found;
150}
151
152static int open_stream(void *log, MovieStream *st)
153{
154 AVCodec *codec;
155 int ret;
156
157 codec = avcodec_find_decoder(st->st->codecpar->codec_id);
158 if (!codec) {
159 av_log(log, AV_LOG_ERROR, "Failed to find any codec\n");
160 return AVERROR(EINVAL);
161 }
162
163 st->codec_ctx = avcodec_alloc_context3(codec);
164 if (!st->codec_ctx)
165 return AVERROR(ENOMEM);
166
167 ret = avcodec_parameters_to_context(st->codec_ctx, st->st->codecpar);
168 if (ret < 0)
169 return ret;
170
171 st->codec_ctx->refcounted_frames = 1;
172
173 if ((ret = avcodec_open2(st->codec_ctx, codec, NULL)) < 0) {
174 av_log(log, AV_LOG_ERROR, "Failed to open codec\n");
175 return ret;
176 }
177
178 return 0;
179}
180
181static int guess_channel_layout(MovieStream *st, int st_index, void *log_ctx)
182{
183 AVCodecParameters *dec_par = st->st->codecpar;
184 char buf[256];
185 int64_t chl = av_get_default_channel_layout(dec_par->channels);
186
187 if (!chl) {
188 av_log(log_ctx, AV_LOG_ERROR,
189 "Channel layout is not set in stream %d, and could not "
190 "be guessed from the number of channels (%d)\n",
191 st_index, dec_par->channels);
192 return AVERROR(EINVAL);
193 }
194
195 av_get_channel_layout_string(buf, sizeof(buf), dec_par->channels, chl);
196 av_log(log_ctx, AV_LOG_WARNING,
197 "Channel layout is not set in output stream %d, "
198 "guessed channel layout is '%s'\n",
199 st_index, buf);
200 dec_par->channel_layout = chl;
201 return 0;
202}
203
204static av_cold int movie_common_init(AVFilterContext *ctx)
205{
206 MovieContext *movie = ctx->priv;
207 AVInputFormat *iformat = NULL;
208 int64_t timestamp;
209 int nb_streams = 1, ret, i;
210 char default_streams[16], *stream_specs, *spec, *cursor;
211 char name[16];
212 AVStream *st;
213
214 if (!movie->file_name) {
215 av_log(ctx, AV_LOG_ERROR, "No filename provided!\n");
216 return AVERROR(EINVAL);
217 }
218
219 movie->seek_point = movie->seek_point_d * 1000000 + 0.5;
220
221 stream_specs = movie->stream_specs;
222 if (!stream_specs) {
223 snprintf(default_streams, sizeof(default_streams), "d%c%d",
224 !strcmp(ctx->filter->name, "amovie") ? 'a' : 'v',
225 movie->stream_index);
226 stream_specs = default_streams;
227 }
228 for (cursor = stream_specs; *cursor; cursor++)
229 if (*cursor == '+')
230 nb_streams++;
231
232 if (movie->loop_count != 1 && nb_streams != 1) {
233 av_log(ctx, AV_LOG_ERROR,
234 "Loop with several streams is currently unsupported\n");
235 return AVERROR_PATCHWELCOME;
236 }
237
238 av_register_all();
239
240 // Try to find the movie format (container)
241 iformat = movie->format_name ? av_find_input_format(movie->format_name) : NULL;
242
243 movie->format_ctx = NULL;
244 if ((ret = avformat_open_input(&movie->format_ctx, movie->file_name, iformat, NULL)) < 0) {
245 av_log(ctx, AV_LOG_ERROR,
246 "Failed to avformat_open_input '%s'\n", movie->file_name);
247 return ret;
248 }
249 if ((ret = avformat_find_stream_info(movie->format_ctx, NULL)) < 0)
250 av_log(ctx, AV_LOG_WARNING, "Failed to find stream info\n");
251
252 // if seeking requested, we execute it
253 if (movie->seek_point > 0) {
254 timestamp = movie->seek_point;
255 // add the stream start time, should it exist
256 if (movie->format_ctx->start_time != AV_NOPTS_VALUE) {
257 if (timestamp > 0 && movie->format_ctx->start_time > INT64_MAX - timestamp) {
258 av_log(ctx, AV_LOG_ERROR,
259 "%s: seek value overflow with start_time:%"PRId64" seek_point:%"PRId64"\n",
260 movie->file_name, movie->format_ctx->start_time, movie->seek_point);
261 return AVERROR(EINVAL);
262 }
263 timestamp += movie->format_ctx->start_time;
264 }
265 if ((ret = av_seek_frame(movie->format_ctx, -1, timestamp, AVSEEK_FLAG_BACKWARD)) < 0) {
266 av_log(ctx, AV_LOG_ERROR, "%s: could not seek to position %"PRId64"\n",
267 movie->file_name, timestamp);
268 return ret;
269 }
270 }
271
272 for (i = 0; i < movie->format_ctx->nb_streams; i++)
273 movie->format_ctx->streams[i]->discard = AVDISCARD_ALL;
274
275 movie->st = av_calloc(nb_streams, sizeof(*movie->st));
276 if (!movie->st)
277 return AVERROR(ENOMEM);
278
279 for (i = 0; i < nb_streams; i++) {
280 spec = av_strtok(stream_specs, "+", &cursor);
281 if (!spec)
282 return AVERROR_BUG;
283 stream_specs = NULL; /* for next strtok */
284 st = find_stream(ctx, movie->format_ctx, spec);
285 if (!st)
286 return AVERROR(EINVAL);
287 st->discard = AVDISCARD_DEFAULT;
288 movie->st[i].st = st;
289 movie->max_stream_index = FFMAX(movie->max_stream_index, st->index);
290 movie->st[i].discontinuity_threshold =
291 av_rescale_q(movie->discontinuity_threshold, AV_TIME_BASE_Q, st->time_base);
292 }
293 if (av_strtok(NULL, "+", &cursor))
294 return AVERROR_BUG;
295
296 movie->out_index = av_calloc(movie->max_stream_index + 1,
297 sizeof(*movie->out_index));
298 if (!movie->out_index)
299 return AVERROR(ENOMEM);
300 for (i = 0; i <= movie->max_stream_index; i++)
301 movie->out_index[i] = -1;
302 for (i = 0; i < nb_streams; i++) {
303 AVFilterPad pad = { 0 };
304 movie->out_index[movie->st[i].st->index] = i;
305 snprintf(name, sizeof(name), "out%d", i);
306 pad.type = movie->st[i].st->codecpar->codec_type;
307 pad.name = av_strdup(name);
308 if (!pad.name)
309 return AVERROR(ENOMEM);
310 pad.config_props = movie_config_output_props;
311 pad.request_frame = movie_request_frame;
312 ff_insert_outpad(ctx, i, &pad);
313 if ( movie->st[i].st->codecpar->codec_type == AVMEDIA_TYPE_AUDIO &&
314 !movie->st[i].st->codecpar->channel_layout) {
315 ret = guess_channel_layout(&movie->st[i], i, ctx);
316 if (ret < 0)
317 return ret;
318 }
319 ret = open_stream(ctx, &movie->st[i]);
320 if (ret < 0)
321 return ret;
322 }
323
324 av_log(ctx, AV_LOG_VERBOSE, "seek_point:%"PRIi64" format_name:%s file_name:%s stream_index:%d\n",
325 movie->seek_point, movie->format_name, movie->file_name,
326 movie->stream_index);
327
328 return 0;
329}
330
331static av_cold void movie_uninit(AVFilterContext *ctx)
332{
333 MovieContext *movie = ctx->priv;
334 int i;
335
336 for (i = 0; i < ctx->nb_outputs; i++) {
337 av_freep(&ctx->output_pads[i].name);
338 if (movie->st[i].st)
339 avcodec_free_context(&movie->st[i].codec_ctx);
340 }
341 av_freep(&movie->st);
342 av_freep(&movie->out_index);
343 if (movie->format_ctx)
344 avformat_close_input(&movie->format_ctx);
345}
346
347static int movie_query_formats(AVFilterContext *ctx)
348{
349 MovieContext *movie = ctx->priv;
350 int list[] = { 0, -1 };
351 int64_t list64[] = { 0, -1 };
352 int i, ret;
353
354 for (i = 0; i < ctx->nb_outputs; i++) {
355 MovieStream *st = &movie->st[i];
356 AVCodecParameters *c = st->st->codecpar;
357 AVFilterLink *outlink = ctx->outputs[i];
358
359 switch (c->codec_type) {
360 case AVMEDIA_TYPE_VIDEO:
361 list[0] = c->format;
362 if ((ret = ff_formats_ref(ff_make_format_list(list), &outlink->in_formats)) < 0)
363 return ret;
364 break;
365 case AVMEDIA_TYPE_AUDIO:
366 list[0] = c->format;
367 if ((ret = ff_formats_ref(ff_make_format_list(list), &outlink->in_formats)) < 0)
368 return ret;
369 list[0] = c->sample_rate;
370 if ((ret = ff_formats_ref(ff_make_format_list(list), &outlink->in_samplerates)) < 0)
371 return ret;
372 list64[0] = c->channel_layout;
373 if ((ret = ff_channel_layouts_ref(avfilter_make_format64_list(list64),
374 &outlink->in_channel_layouts)) < 0)
375 return ret;
376 break;
377 }
378 }
379
380 return 0;
381}
382
383static int movie_config_output_props(AVFilterLink *outlink)
384{
385 AVFilterContext *ctx = outlink->src;
386 MovieContext *movie = ctx->priv;
387 unsigned out_id = FF_OUTLINK_IDX(outlink);
388 MovieStream *st = &movie->st[out_id];
389 AVCodecParameters *c = st->st->codecpar;
390
391 outlink->time_base = st->st->time_base;
392
393 switch (c->codec_type) {
394 case AVMEDIA_TYPE_VIDEO:
395 outlink->w = c->width;
396 outlink->h = c->height;
397 outlink->frame_rate = st->st->r_frame_rate;
398 break;
399 case AVMEDIA_TYPE_AUDIO:
400 break;
401 }
402
403 return 0;
404}
405
406static char *describe_frame_to_str(char *dst, size_t dst_size,
407 AVFrame *frame, enum AVMediaType frame_type,
408 AVFilterLink *link)
409{
410 switch (frame_type) {
411 case AVMEDIA_TYPE_VIDEO:
412 snprintf(dst, dst_size,
413 "video pts:%s time:%s size:%dx%d aspect:%d/%d",
414 av_ts2str(frame->pts), av_ts2timestr(frame->pts, &link->time_base),
415 frame->width, frame->height,
416 frame->sample_aspect_ratio.num,
417 frame->sample_aspect_ratio.den);
418 break;
419 case AVMEDIA_TYPE_AUDIO:
420 snprintf(dst, dst_size,
421 "audio pts:%s time:%s samples:%d",
422 av_ts2str(frame->pts), av_ts2timestr(frame->pts, &link->time_base),
423 frame->nb_samples);
424 break;
425 default:
426 snprintf(dst, dst_size, "%s BUG", av_get_media_type_string(frame_type));
427 break;
428 }
429 return dst;
430}
431
432static int rewind_file(AVFilterContext *ctx)
433{
434 MovieContext *movie = ctx->priv;
435 int64_t timestamp = movie->seek_point;
436 int ret, i;
437
438 if (movie->format_ctx->start_time != AV_NOPTS_VALUE)
439 timestamp += movie->format_ctx->start_time;
440 ret = av_seek_frame(movie->format_ctx, -1, timestamp, AVSEEK_FLAG_BACKWARD);
441 if (ret < 0) {
442 av_log(ctx, AV_LOG_ERROR, "Unable to loop: %s\n", av_err2str(ret));
443 movie->loop_count = 1; /* do not try again */
444 return ret;
445 }
446
447 for (i = 0; i < ctx->nb_outputs; i++) {
448 avcodec_flush_buffers(movie->st[i].codec_ctx);
449 movie->st[i].done = 0;
450 }
451 movie->eof = 0;
452 return 0;
453}
454
455/**
456 * Try to push a frame to the requested output.
457 *
458 * @param ctx filter context
459 * @param out_id number of output where a frame is wanted;
460 * if the frame is read from file, used to set the return value;
461 * if the codec is being flushed, flush the corresponding stream
462 * @return 1 if a frame was pushed on the requested output,
463 * 0 if another attempt is possible,
464 * <0 AVERROR code
465 */
466static int movie_push_frame(AVFilterContext *ctx, unsigned out_id)
467{
468 MovieContext *movie = ctx->priv;
469 AVPacket *pkt = &movie->pkt;
470 enum AVMediaType frame_type;
471 MovieStream *st;
472 int ret, got_frame = 0, pkt_out_id;
473 AVFilterLink *outlink;
474 AVFrame *frame;
475
476 if (!pkt->size) {
477 if (movie->eof) {
478 if (movie->st[out_id].done) {
479 if (movie->loop_count != 1) {
480 ret = rewind_file(ctx);
481 if (ret < 0)
482 return ret;
483 movie->loop_count -= movie->loop_count > 1;
484 av_log(ctx, AV_LOG_VERBOSE, "Stream finished, looping.\n");
485 return 0; /* retry */
486 }
487 return AVERROR_EOF;
488 }
489 pkt->stream_index = movie->st[out_id].st->index;
490 /* packet is already ready for flushing */
491 } else {
492 ret = av_read_frame(movie->format_ctx, &movie->pkt0);
493 if (ret < 0) {
494 av_init_packet(&movie->pkt0); /* ready for flushing */
495 *pkt = movie->pkt0;
496 if (ret == AVERROR_EOF) {
497 movie->eof = 1;
498 return 0; /* start flushing */
499 }
500 return ret;
501 }
502 *pkt = movie->pkt0;
503 }
504 }
505
506 pkt_out_id = pkt->stream_index > movie->max_stream_index ? -1 :
507 movie->out_index[pkt->stream_index];
508 if (pkt_out_id < 0) {
509 av_packet_unref(&movie->pkt0);
510 pkt->size = 0; /* ready for next run */
511 pkt->data = NULL;
512 return 0;
513 }
514 st = &movie->st[pkt_out_id];
515 outlink = ctx->outputs[pkt_out_id];
516
517 frame = av_frame_alloc();
518 if (!frame)
519 return AVERROR(ENOMEM);
520
521 frame_type = st->st->codecpar->codec_type;
522 switch (frame_type) {
523 case AVMEDIA_TYPE_VIDEO:
524 ret = avcodec_decode_video2(st->codec_ctx, frame, &got_frame, pkt);
525 break;
526 case AVMEDIA_TYPE_AUDIO:
527 ret = avcodec_decode_audio4(st->codec_ctx, frame, &got_frame, pkt);
528 break;
529 default:
530 ret = AVERROR(ENOSYS);
531 break;
532 }
533 if (ret < 0) {
534 av_log(ctx, AV_LOG_WARNING, "Decode error: %s\n", av_err2str(ret));
535 av_frame_free(&frame);
536 av_packet_unref(&movie->pkt0);
537 movie->pkt.size = 0;
538 movie->pkt.data = NULL;
539 return 0;
540 }
541 if (!ret || st->st->codecpar->codec_type == AVMEDIA_TYPE_VIDEO)
542 ret = pkt->size;
543
544 pkt->data += ret;
545 pkt->size -= ret;
546 if (pkt->size <= 0) {
547 av_packet_unref(&movie->pkt0);
548 pkt->size = 0; /* ready for next run */
549 pkt->data = NULL;
550 }
551 if (!got_frame) {
552 if (!ret)
553 st->done = 1;
554 av_frame_free(&frame);
555 return 0;
556 }
557
558 frame->pts = av_frame_get_best_effort_timestamp(frame);
559 if (frame->pts != AV_NOPTS_VALUE) {
560 if (movie->ts_offset)
561 frame->pts += av_rescale_q_rnd(movie->ts_offset, AV_TIME_BASE_Q, outlink->time_base, AV_ROUND_UP);
562 if (st->discontinuity_threshold) {
563 if (st->last_pts != AV_NOPTS_VALUE) {
564 int64_t diff = frame->pts - st->last_pts;
565 if (diff < 0 || diff > st->discontinuity_threshold) {
566 av_log(ctx, AV_LOG_VERBOSE, "Discontinuity in stream:%d diff:%"PRId64"\n", pkt_out_id, diff);
567 movie->ts_offset += av_rescale_q_rnd(-diff, outlink->time_base, AV_TIME_BASE_Q, AV_ROUND_UP);
568 frame->pts -= diff;
569 }
570 }
571 }
572 st->last_pts = frame->pts;
573 }
574 ff_dlog(ctx, "movie_push_frame(): file:'%s' %s\n", movie->file_name,
575 describe_frame_to_str((char[1024]){0}, 1024, frame, frame_type, outlink));
576
577 if (st->st->codecpar->codec_type == AVMEDIA_TYPE_VIDEO) {
578 if (frame->format != outlink->format) {
579 av_log(ctx, AV_LOG_ERROR, "Format changed %s -> %s, discarding frame\n",
580 av_get_pix_fmt_name(outlink->format),
581 av_get_pix_fmt_name(frame->format)
582 );
583 av_frame_free(&frame);
584 return 0;
585 }
586 }
587 ret = ff_filter_frame(outlink, frame);
588
589 if (ret < 0)
590 return ret;
591 return pkt_out_id == out_id;
592}
593
594static int movie_request_frame(AVFilterLink *outlink)
595{
596 AVFilterContext *ctx = outlink->src;
597 unsigned out_id = FF_OUTLINK_IDX(outlink);
598 int ret;
599
600 while (1) {
601 ret = movie_push_frame(ctx, out_id);
602 if (ret)
603 return FFMIN(ret, 0);
604 }
605}
606
607static int process_command(AVFilterContext *ctx, const char *cmd, const char *args,
608 char *res, int res_len, int flags)
609{
610 MovieContext *movie = ctx->priv;
611 int ret = AVERROR(ENOSYS);
612
613 if (!strcmp(cmd, "seek")) {
614 int idx, flags, i;
615 int64_t ts;
616 char tail[2];
617
618 if (sscanf(args, "%i|%"SCNi64"|%i %1s", &idx, &ts, &flags, tail) != 3)
619 return AVERROR(EINVAL);
620
621 ret = av_seek_frame(movie->format_ctx, idx, ts, flags);
622 if (ret < 0)
623 return ret;
624
625 for (i = 0; i < ctx->nb_outputs; i++) {
626 avcodec_flush_buffers(movie->st[i].codec_ctx);
627 movie->st[i].done = 0;
628 }
629 return ret;
630 } else if (!strcmp(cmd, "get_duration")) {
631 int print_len;
632 char tail[2];
633
634 if (!res || res_len <= 0)
635 return AVERROR(EINVAL);
636
637 if (args && sscanf(args, "%1s", tail) == 1)
638 return AVERROR(EINVAL);
639
640 print_len = snprintf(res, res_len, "%"PRId64, movie->format_ctx->duration);
641 if (print_len < 0 || print_len >= res_len)
642 return AVERROR(EINVAL);
643
644 return 0;
645 }
646
647 return ret;
648}
649
650#if CONFIG_MOVIE_FILTER
651
652AVFILTER_DEFINE_CLASS(movie);
653
654AVFilter ff_avsrc_movie = {
655 .name = "movie",
656 .description = NULL_IF_CONFIG_SMALL("Read from a movie source."),
657 .priv_size = sizeof(MovieContext),
658 .priv_class = &movie_class,
659 .init = movie_common_init,
660 .uninit = movie_uninit,
661 .query_formats = movie_query_formats,
662
663 .inputs = NULL,
664 .outputs = NULL,
665 .flags = AVFILTER_FLAG_DYNAMIC_OUTPUTS,
666 .process_command = process_command
667};
668
669#endif /* CONFIG_MOVIE_FILTER */
670
671#if CONFIG_AMOVIE_FILTER
672
673#define amovie_options movie_options
674AVFILTER_DEFINE_CLASS(amovie);
675
676AVFilter ff_avsrc_amovie = {
677 .name = "amovie",
678 .description = NULL_IF_CONFIG_SMALL("Read audio from a movie source."),
679 .priv_size = sizeof(MovieContext),
680 .init = movie_common_init,
681 .uninit = movie_uninit,
682 .query_formats = movie_query_formats,
683
684 .inputs = NULL,
685 .outputs = NULL,
686 .priv_class = &amovie_class,
687 .flags = AVFILTER_FLAG_DYNAMIC_OUTPUTS,
688 .process_command = process_command,
689};
690
691#endif /* CONFIG_AMOVIE_FILTER */
692
generated by cgit at 2024-05-17 04:46:23 (GMT)