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 "config_components.h"
31
32 #include <float.h>
33 #include <stdint.h>
34
35 #include "libavutil/attributes.h"
36 #include "libavutil/avstring.h"
37 #include "libavutil/channel_layout.h"
38 #include "libavutil/opt.h"
39 #include "libavutil/imgutils.h"
40 #include "libavutil/internal.h"
41 #include "libavutil/timestamp.h"
42
43 #include "libavcodec/avcodec.h"
44
45 #include "libavformat/avformat.h"
46
47 #include "audio.h"
48 #include "avfilter.h"
49 #include "formats.h"
50 #include "internal.h"
51 #include "video.h"
52
53 typedef struct MovieStream {
54 AVStream *st;
55 AVCodecContext *codec_ctx;
56 int64_t discontinuity_threshold;
57 int64_t last_pts;
58 } MovieStream;
59
60 typedef struct MovieContext {
61 /* common A/V fields */
62 const AVClass *class;
63 int64_t seek_point; ///< seekpoint in microseconds
64 double seek_point_d;
65 char *format_name;
66 char *file_name;
67 char *stream_specs; /**< user-provided list of streams, separated by + */
68 int stream_index; /**< for compatibility */
69 int loop_count;
70 int64_t discontinuity_threshold;
71 int64_t ts_offset;
72 int dec_threads;
73
74 AVFormatContext *format_ctx;
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 AVDictionary *format_opts;
80 } MovieContext;
81
82 #define OFFSET(x) offsetof(MovieContext, x)
83 #define FLAGS AV_OPT_FLAG_FILTERING_PARAM | AV_OPT_FLAG_AUDIO_PARAM | AV_OPT_FLAG_VIDEO_PARAM
84
85 static const AVOption movie_options[]= {
86 { "filename", NULL, OFFSET(file_name), AV_OPT_TYPE_STRING, .flags = FLAGS },
87 { "format_name", "set format name", OFFSET(format_name), AV_OPT_TYPE_STRING, .flags = FLAGS },
88 { "f", "set format name", OFFSET(format_name), AV_OPT_TYPE_STRING, .flags = FLAGS },
89 { "stream_index", "set stream index", OFFSET(stream_index), AV_OPT_TYPE_INT, { .i64 = -1 }, -1, INT_MAX, FLAGS },
90 { "si", "set stream index", OFFSET(stream_index), AV_OPT_TYPE_INT, { .i64 = -1 }, -1, INT_MAX, FLAGS },
91 { "seek_point", "set seekpoint (seconds)", OFFSET(seek_point_d), AV_OPT_TYPE_DOUBLE, { .dbl = 0 }, 0, (INT64_MAX-1) / 1000000, FLAGS },
92 { "sp", "set seekpoint (seconds)", OFFSET(seek_point_d), AV_OPT_TYPE_DOUBLE, { .dbl = 0 }, 0, (INT64_MAX-1) / 1000000, FLAGS },
93 { "streams", "set streams", OFFSET(stream_specs), AV_OPT_TYPE_STRING, {.str = 0}, 0, 0, FLAGS },
94 { "s", "set streams", OFFSET(stream_specs), AV_OPT_TYPE_STRING, {.str = 0}, 0, 0, FLAGS },
95 { "loop", "set loop count", OFFSET(loop_count), AV_OPT_TYPE_INT, {.i64 = 1}, 0, INT_MAX, FLAGS },
96 { "discontinuity", "set discontinuity threshold", OFFSET(discontinuity_threshold), AV_OPT_TYPE_DURATION, {.i64 = 0}, 0, INT64_MAX, FLAGS },
97 { "dec_threads", "set the number of threads for decoding", OFFSET(dec_threads), AV_OPT_TYPE_INT, {.i64 = 0}, 0, INT_MAX, FLAGS },
98 { "format_opts", "set format options for the opened file", OFFSET(format_opts), AV_OPT_TYPE_DICT, {.str = NULL}, 0, 0, FLAGS},
99 { NULL },
100 };
101
102 static int movie_config_output_props(AVFilterLink *outlink);
103 static int movie_request_frame(AVFilterLink *outlink);
104
find_stream(void * log,AVFormatContext * avf,const char * spec)105 static AVStream *find_stream(void *log, AVFormatContext *avf, const char *spec)
106 {
107 int i, ret, already = 0, stream_id = -1;
108 char type_char[2], dummy;
109 AVStream *found = NULL;
110 enum AVMediaType type;
111
112 ret = sscanf(spec, "d%1[av]%d%c", type_char, &stream_id, &dummy);
113 if (ret >= 1 && ret <= 2) {
114 type = type_char[0] == 'v' ? AVMEDIA_TYPE_VIDEO : AVMEDIA_TYPE_AUDIO;
115 ret = av_find_best_stream(avf, type, stream_id, -1, NULL, 0);
116 if (ret < 0) {
117 av_log(log, AV_LOG_ERROR, "No %s stream with index '%d' found\n",
118 av_get_media_type_string(type), stream_id);
119 return NULL;
120 }
121 return avf->streams[ret];
122 }
123 for (i = 0; i < avf->nb_streams; i++) {
124 ret = avformat_match_stream_specifier(avf, avf->streams[i], spec);
125 if (ret < 0) {
126 av_log(log, AV_LOG_ERROR,
127 "Invalid stream specifier \"%s\"\n", spec);
128 return NULL;
129 }
130 if (!ret)
131 continue;
132 if (avf->streams[i]->discard != AVDISCARD_ALL) {
133 already++;
134 continue;
135 }
136 if (found) {
137 av_log(log, AV_LOG_WARNING,
138 "Ambiguous stream specifier \"%s\", using #%d\n", spec, i);
139 break;
140 }
141 found = avf->streams[i];
142 }
143 if (!found) {
144 av_log(log, AV_LOG_WARNING, "Stream specifier \"%s\" %s\n", spec,
145 already ? "matched only already used streams" :
146 "did not match any stream");
147 return NULL;
148 }
149 if (found->codecpar->codec_type != AVMEDIA_TYPE_VIDEO &&
150 found->codecpar->codec_type != AVMEDIA_TYPE_AUDIO) {
151 av_log(log, AV_LOG_ERROR, "Stream specifier \"%s\" matched a %s stream,"
152 "currently unsupported by libavfilter\n", spec,
153 av_get_media_type_string(found->codecpar->codec_type));
154 return NULL;
155 }
156 return found;
157 }
158
open_stream(AVFilterContext * ctx,MovieStream * st,int dec_threads)159 static int open_stream(AVFilterContext *ctx, MovieStream *st, int dec_threads)
160 {
161 const AVCodec *codec;
162 int ret;
163
164 codec = avcodec_find_decoder(st->st->codecpar->codec_id);
165 if (!codec) {
166 av_log(ctx, AV_LOG_ERROR, "Failed to find any codec\n");
167 return AVERROR(EINVAL);
168 }
169
170 st->codec_ctx = avcodec_alloc_context3(codec);
171 if (!st->codec_ctx)
172 return AVERROR(ENOMEM);
173
174 ret = avcodec_parameters_to_context(st->codec_ctx, st->st->codecpar);
175 if (ret < 0)
176 return ret;
177
178 if (!dec_threads)
179 dec_threads = ff_filter_get_nb_threads(ctx);
180 st->codec_ctx->thread_count = dec_threads;
181
182 if ((ret = avcodec_open2(st->codec_ctx, codec, NULL)) < 0) {
183 av_log(ctx, AV_LOG_ERROR, "Failed to open codec\n");
184 return ret;
185 }
186
187 return 0;
188 }
189
guess_channel_layout(MovieStream * st,int st_index,void * log_ctx)190 static int guess_channel_layout(MovieStream *st, int st_index, void *log_ctx)
191 {
192 AVCodecParameters *dec_par = st->st->codecpar;
193 char buf[256];
194 AVChannelLayout chl = { 0 };
195
196 av_channel_layout_default(&chl, dec_par->ch_layout.nb_channels);
197
198 if (!KNOWN(&chl)) {
199 av_log(log_ctx, AV_LOG_ERROR,
200 "Channel layout is not set in stream %d, and could not "
201 "be guessed from the number of channels (%d)\n",
202 st_index, dec_par->ch_layout.nb_channels);
203 return AVERROR(EINVAL);
204 }
205
206 av_channel_layout_describe(&chl, buf, sizeof(buf));
207 av_log(log_ctx, AV_LOG_WARNING,
208 "Channel layout is not set in output stream %d, "
209 "guessed channel layout is '%s'\n",
210 st_index, buf);
211 return av_channel_layout_copy(&dec_par->ch_layout, &chl);
212 }
213
movie_common_init(AVFilterContext * ctx)214 static av_cold int movie_common_init(AVFilterContext *ctx)
215 {
216 MovieContext *movie = ctx->priv;
217 const AVInputFormat *iformat = NULL;
218 int64_t timestamp;
219 int nb_streams = 1, ret, i;
220 char default_streams[16], *stream_specs, *spec, *cursor;
221 AVStream *st;
222
223 if (!movie->file_name) {
224 av_log(ctx, AV_LOG_ERROR, "No filename provided!\n");
225 return AVERROR(EINVAL);
226 }
227
228 movie->seek_point = movie->seek_point_d * 1000000 + 0.5;
229
230 stream_specs = movie->stream_specs;
231 if (!stream_specs) {
232 snprintf(default_streams, sizeof(default_streams), "d%c%d",
233 !strcmp(ctx->filter->name, "amovie") ? 'a' : 'v',
234 movie->stream_index);
235 stream_specs = default_streams;
236 }
237 for (cursor = stream_specs; *cursor; cursor++)
238 if (*cursor == '+')
239 nb_streams++;
240
241 if (movie->loop_count != 1 && nb_streams != 1) {
242 av_log(ctx, AV_LOG_ERROR,
243 "Loop with several streams is currently unsupported\n");
244 return AVERROR_PATCHWELCOME;
245 }
246
247 // Try to find the movie format (container)
248 iformat = movie->format_name ? av_find_input_format(movie->format_name) : NULL;
249
250 movie->format_ctx = NULL;
251 if ((ret = avformat_open_input(&movie->format_ctx, movie->file_name, iformat, &movie->format_opts)) < 0) {
252 av_log(ctx, AV_LOG_ERROR,
253 "Failed to avformat_open_input '%s'\n", movie->file_name);
254 return ret;
255 }
256 if ((ret = avformat_find_stream_info(movie->format_ctx, NULL)) < 0)
257 av_log(ctx, AV_LOG_WARNING, "Failed to find stream info\n");
258
259 // if seeking requested, we execute it
260 if (movie->seek_point > 0) {
261 timestamp = movie->seek_point;
262 // add the stream start time, should it exist
263 if (movie->format_ctx->start_time != AV_NOPTS_VALUE) {
264 if (timestamp > 0 && movie->format_ctx->start_time > INT64_MAX - timestamp) {
265 av_log(ctx, AV_LOG_ERROR,
266 "%s: seek value overflow with start_time:%"PRId64" seek_point:%"PRId64"\n",
267 movie->file_name, movie->format_ctx->start_time, movie->seek_point);
268 return AVERROR(EINVAL);
269 }
270 timestamp += movie->format_ctx->start_time;
271 }
272 if ((ret = av_seek_frame(movie->format_ctx, -1, timestamp, AVSEEK_FLAG_BACKWARD)) < 0) {
273 av_log(ctx, AV_LOG_ERROR, "%s: could not seek to position %"PRId64"\n",
274 movie->file_name, timestamp);
275 return ret;
276 }
277 }
278
279 for (i = 0; i < movie->format_ctx->nb_streams; i++)
280 movie->format_ctx->streams[i]->discard = AVDISCARD_ALL;
281
282 movie->st = av_calloc(nb_streams, sizeof(*movie->st));
283 if (!movie->st)
284 return AVERROR(ENOMEM);
285
286 for (i = 0; i < nb_streams; i++) {
287 spec = av_strtok(stream_specs, "+", &cursor);
288 if (!spec)
289 return AVERROR_BUG;
290 stream_specs = NULL; /* for next strtok */
291 st = find_stream(ctx, movie->format_ctx, spec);
292 if (!st)
293 return AVERROR(EINVAL);
294 st->discard = AVDISCARD_DEFAULT;
295 movie->st[i].st = st;
296 movie->max_stream_index = FFMAX(movie->max_stream_index, st->index);
297 movie->st[i].discontinuity_threshold =
298 av_rescale_q(movie->discontinuity_threshold, AV_TIME_BASE_Q, st->time_base);
299 }
300 if (av_strtok(NULL, "+", &cursor))
301 return AVERROR_BUG;
302
303 movie->out_index = av_calloc(movie->max_stream_index + 1,
304 sizeof(*movie->out_index));
305 if (!movie->out_index)
306 return AVERROR(ENOMEM);
307 for (i = 0; i <= movie->max_stream_index; i++)
308 movie->out_index[i] = -1;
309 for (i = 0; i < nb_streams; i++) {
310 AVFilterPad pad = { 0 };
311 movie->out_index[movie->st[i].st->index] = i;
312 pad.type = movie->st[i].st->codecpar->codec_type;
313 pad.name = av_asprintf("out%d", i);
314 if (!pad.name)
315 return AVERROR(ENOMEM);
316 pad.config_props = movie_config_output_props;
317 pad.request_frame = movie_request_frame;
318 if ((ret = ff_append_outpad_free_name(ctx, &pad)) < 0)
319 return ret;
320 if ( movie->st[i].st->codecpar->codec_type == AVMEDIA_TYPE_AUDIO &&
321 !KNOWN(&movie->st[i].st->codecpar->ch_layout)) {
322 ret = guess_channel_layout(&movie->st[i], i, ctx);
323 if (ret < 0)
324 return ret;
325 }
326 ret = open_stream(ctx, &movie->st[i], movie->dec_threads);
327 if (ret < 0)
328 return ret;
329 }
330
331 av_log(ctx, AV_LOG_VERBOSE, "seek_point:%"PRIi64" format_name:%s file_name:%s stream_index:%d\n",
332 movie->seek_point, movie->format_name, movie->file_name,
333 movie->stream_index);
334
335 return 0;
336 }
337
movie_uninit(AVFilterContext * ctx)338 static av_cold void movie_uninit(AVFilterContext *ctx)
339 {
340 MovieContext *movie = ctx->priv;
341 int i;
342
343 for (i = 0; i < ctx->nb_outputs; i++) {
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 AVChannelLayout list64[] = { { 0 }, { 0 } };
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->incfg.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->incfg.formats)) < 0)
374 return ret;
375 list[0] = c->sample_rate;
376 if ((ret = ff_formats_ref(ff_make_format_list(list), &outlink->incfg.samplerates)) < 0)
377 return ret;
378 list64[0] = c->ch_layout;
379 if ((ret = ff_channel_layouts_ref(ff_make_channel_layout_list(list64),
380 &outlink->incfg.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 }
456 return 0;
457 }
458
movie_decode_packet(AVFilterContext * ctx)459 static int movie_decode_packet(AVFilterContext *ctx)
460 {
461 MovieContext *movie = ctx->priv;
462 AVPacket pkt = { 0 };
463 int pkt_out_id, ret;
464
465 /* read a new packet from input stream */
466 ret = av_read_frame(movie->format_ctx, &pkt);
467 if (ret == AVERROR_EOF) {
468 /* EOF -> set all decoders for flushing */
469 for (int i = 0; i < ctx->nb_outputs; i++) {
470 ret = avcodec_send_packet(movie->st[i].codec_ctx, NULL);
471 if (ret < 0 && ret != AVERROR_EOF)
472 return ret;
473 }
474
475 return 0;
476 } else if (ret < 0)
477 return ret;
478
479 /* send the packet to its decoder, if any */
480 pkt_out_id = pkt.stream_index > movie->max_stream_index ? -1 :
481 movie->out_index[pkt.stream_index];
482 if (pkt_out_id >= 0)
483 ret = avcodec_send_packet(movie->st[pkt_out_id].codec_ctx, &pkt);
484 av_packet_unref(&pkt);
485
486 return ret;
487 }
488
489 /**
490 * Try to push a frame to the requested output.
491 *
492 * @param ctx filter context
493 * @param out_id number of output where a frame is wanted;
494 * @return 0 if a frame was pushed on the requested output,
495 * AVERROR(EAGAIN) if the decoder requires more input
496 * AVERROR(EOF) if the decoder has been completely flushed
497 * <0 AVERROR code
498 */
movie_push_frame(AVFilterContext * ctx,unsigned out_id)499 static int movie_push_frame(AVFilterContext *ctx, unsigned out_id)
500 {
501 MovieContext *movie = ctx->priv;
502 MovieStream *st = &movie->st[out_id];
503 AVFilterLink *outlink = ctx->outputs[out_id];
504 AVFrame *frame;
505 int ret;
506
507 frame = av_frame_alloc();
508 if (!frame)
509 return AVERROR(ENOMEM);
510
511 ret = avcodec_receive_frame(st->codec_ctx, frame);
512 if (ret < 0) {
513 if (ret != AVERROR_EOF && ret != AVERROR(EAGAIN))
514 av_log(ctx, AV_LOG_WARNING, "Decode error: %s\n", av_err2str(ret));
515
516 av_frame_free(&frame);
517 return ret;
518 }
519
520 frame->pts = frame->best_effort_timestamp;
521 if (frame->pts != AV_NOPTS_VALUE) {
522 if (movie->ts_offset)
523 frame->pts += av_rescale_q_rnd(movie->ts_offset, AV_TIME_BASE_Q, outlink->time_base, AV_ROUND_UP);
524 if (st->discontinuity_threshold) {
525 if (st->last_pts != AV_NOPTS_VALUE) {
526 int64_t diff = frame->pts - st->last_pts;
527 if (diff < 0 || diff > st->discontinuity_threshold) {
528 av_log(ctx, AV_LOG_VERBOSE, "Discontinuity in stream:%d diff:%"PRId64"\n", out_id, diff);
529 movie->ts_offset += av_rescale_q_rnd(-diff, outlink->time_base, AV_TIME_BASE_Q, AV_ROUND_UP);
530 frame->pts -= diff;
531 }
532 }
533 }
534 st->last_pts = frame->pts;
535 }
536 ff_dlog(ctx, "movie_push_frame(): file:'%s' %s\n", movie->file_name,
537 describe_frame_to_str((char[1024]){0}, 1024, frame,
538 st->st->codecpar->codec_type, outlink));
539
540 if (st->st->codecpar->codec_type == AVMEDIA_TYPE_VIDEO) {
541 if (frame->format != outlink->format) {
542 av_log(ctx, AV_LOG_ERROR, "Format changed %s -> %s, discarding frame\n",
543 av_get_pix_fmt_name(outlink->format),
544 av_get_pix_fmt_name(frame->format)
545 );
546 av_frame_free(&frame);
547 return 0;
548 }
549 }
550 ret = ff_filter_frame(outlink, frame);
551
552 if (ret < 0)
553 return ret;
554 return 0;
555 }
556
movie_request_frame(AVFilterLink * outlink)557 static int movie_request_frame(AVFilterLink *outlink)
558 {
559 AVFilterContext *ctx = outlink->src;
560 MovieContext *movie = ctx->priv;
561 unsigned out_id = FF_OUTLINK_IDX(outlink);
562
563 while (1) {
564 int got_eagain = 0, got_eof = 0;
565 int ret = 0;
566
567 /* check all decoders for available output */
568 for (int i = 0; i < ctx->nb_outputs; i++) {
569 ret = movie_push_frame(ctx, i);
570 if (ret == AVERROR(EAGAIN))
571 got_eagain++;
572 else if (ret == AVERROR_EOF)
573 got_eof++;
574 else if (ret < 0)
575 return ret;
576 else if (i == out_id)
577 return 0;
578 }
579
580 if (got_eagain) {
581 /* all decoders require more input -> read a new packet */
582 ret = movie_decode_packet(ctx);
583 if (ret < 0)
584 return ret;
585 } else if (got_eof) {
586 /* all decoders flushed */
587 if (movie->loop_count != 1) {
588 ret = rewind_file(ctx);
589 if (ret < 0)
590 return ret;
591 movie->loop_count -= movie->loop_count > 1;
592 av_log(ctx, AV_LOG_VERBOSE, "Stream finished, looping.\n");
593 continue;
594 }
595 return AVERROR_EOF;
596 }
597 }
598 }
599
process_command(AVFilterContext * ctx,const char * cmd,const char * args,char * res,int res_len,int flags)600 static int process_command(AVFilterContext *ctx, const char *cmd, const char *args,
601 char *res, int res_len, int flags)
602 {
603 MovieContext *movie = ctx->priv;
604 int ret = AVERROR(ENOSYS);
605
606 if (!strcmp(cmd, "seek")) {
607 int idx, flags, i;
608 int64_t ts;
609 char tail[2];
610
611 if (sscanf(args, "%i|%"SCNi64"|%i %1s", &idx, &ts, &flags, tail) != 3)
612 return AVERROR(EINVAL);
613
614 ret = av_seek_frame(movie->format_ctx, idx, ts, flags);
615 if (ret < 0)
616 return ret;
617
618 for (i = 0; i < ctx->nb_outputs; i++) {
619 avcodec_flush_buffers(movie->st[i].codec_ctx);
620 }
621 return ret;
622 } else if (!strcmp(cmd, "get_duration")) {
623 int print_len;
624 char tail[2];
625
626 if (!res || res_len <= 0)
627 return AVERROR(EINVAL);
628
629 if (args && sscanf(args, "%1s", tail) == 1)
630 return AVERROR(EINVAL);
631
632 print_len = snprintf(res, res_len, "%"PRId64, movie->format_ctx->duration);
633 if (print_len < 0 || print_len >= res_len)
634 return AVERROR(EINVAL);
635
636 return 0;
637 }
638
639 return ret;
640 }
641
642 AVFILTER_DEFINE_CLASS_EXT(movie, "(a)movie", movie_options);
643
644 #if CONFIG_MOVIE_FILTER
645
646 const AVFilter ff_avsrc_movie = {
647 .name = "movie",
648 .description = NULL_IF_CONFIG_SMALL("Read from a movie source."),
649 .priv_size = sizeof(MovieContext),
650 .priv_class = &movie_class,
651 .init = movie_common_init,
652 .uninit = movie_uninit,
653 FILTER_QUERY_FUNC(movie_query_formats),
654
655 .inputs = NULL,
656 .outputs = NULL,
657 .flags = AVFILTER_FLAG_DYNAMIC_OUTPUTS,
658 .process_command = process_command
659 };
660
661 #endif /* CONFIG_MOVIE_FILTER */
662
663 #if CONFIG_AMOVIE_FILTER
664
665 const AVFilter ff_avsrc_amovie = {
666 .name = "amovie",
667 .description = NULL_IF_CONFIG_SMALL("Read audio from a movie source."),
668 .priv_class = &movie_class,
669 .priv_size = sizeof(MovieContext),
670 .init = movie_common_init,
671 .uninit = movie_uninit,
672 FILTER_QUERY_FUNC(movie_query_formats),
673
674 .inputs = NULL,
675 .outputs = NULL,
676 .flags = AVFILTER_FLAG_DYNAMIC_OUTPUTS,
677 .process_command = process_command,
678 };
679
680 #endif /* CONFIG_AMOVIE_FILTER */
681