GCC Code Coverage Report
Directory: ../../../ffmpeg/ Exec Total Coverage
File: src/libavfilter/src_movie.c Lines: 185 340 54.4 %
Date: 2020-10-23 17:01:47 Branches: 88 202 43.6 %

Line Branch Exec Source
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;
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
102
11
static AVStream *find_stream(void *log, AVFormatContext *avf, const char *spec)
103
{
104
11
    int i, ret, already = 0, stream_id = -1;
105
    char type_char[2], dummy;
106
11
    AVStream *found = NULL;
107
    enum AVMediaType type;
108
109
11
    ret = sscanf(spec, "d%1[av]%d%c", type_char, &stream_id, &dummy);
110

11
    if (ret >= 1 && ret <= 2) {
111
11
        type = type_char[0] == 'v' ? AVMEDIA_TYPE_VIDEO : AVMEDIA_TYPE_AUDIO;
112
11
        ret = av_find_best_stream(avf, type, stream_id, -1, NULL, 0);
113
11
        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
11
        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
156
11
static int open_stream(AVFilterContext *ctx, MovieStream *st)
157
{
158
    const AVCodec *codec;
159
    int ret;
160
161
11
    codec = avcodec_find_decoder(st->st->codecpar->codec_id);
162
11
    if (!codec) {
163
        av_log(ctx, AV_LOG_ERROR, "Failed to find any codec\n");
164
        return AVERROR(EINVAL);
165
    }
166
167
11
    st->codec_ctx = avcodec_alloc_context3(codec);
168
11
    if (!st->codec_ctx)
169
        return AVERROR(ENOMEM);
170
171
11
    ret = avcodec_parameters_to_context(st->codec_ctx, st->st->codecpar);
172
11
    if (ret < 0)
173
        return ret;
174
175
11
    st->codec_ctx->refcounted_frames = 1;
176
11
    st->codec_ctx->thread_count = ff_filter_get_nb_threads(ctx);
177
178
11
    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
11
    return 0;
184
}
185
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
209
11
static av_cold int movie_common_init(AVFilterContext *ctx)
210
{
211
11
    MovieContext *movie = ctx->priv;
212
11
    AVInputFormat *iformat = NULL;
213
    int64_t timestamp;
214
11
    int nb_streams = 1, ret, i;
215
    char default_streams[16], *stream_specs, *spec, *cursor;
216
    AVStream *st;
217
218
11
    if (!movie->file_name) {
219
        av_log(ctx, AV_LOG_ERROR, "No filename provided!\n");
220
        return AVERROR(EINVAL);
221
    }
222
223
11
    movie->seek_point = movie->seek_point_d * 1000000 + 0.5;
224
225
11
    stream_specs = movie->stream_specs;
226
11
    if (!stream_specs) {
227
11
        snprintf(default_streams, sizeof(default_streams), "d%c%d",
228
11
                 !strcmp(ctx->filter->name, "amovie") ? 'a' : 'v',
229
                 movie->stream_index);
230
11
        stream_specs = default_streams;
231
    }
232
55
    for (cursor = stream_specs; *cursor; cursor++)
233
44
        if (*cursor == '+')
234
            nb_streams++;
235
236

11
    if (movie->loop_count != 1 && nb_streams != 1) {
237
        av_log(ctx, AV_LOG_ERROR,
238
               "Loop with several streams is currently unsupported\n");
239
        return AVERROR_PATCHWELCOME;
240
    }
241
242
    // Try to find the movie format (container)
243
11
    iformat = movie->format_name ? av_find_input_format(movie->format_name) : NULL;
244
245
11
    movie->format_ctx = NULL;
246
11
    if ((ret = avformat_open_input(&movie->format_ctx, movie->file_name, iformat, NULL)) < 0) {
247
        av_log(ctx, AV_LOG_ERROR,
248
               "Failed to avformat_open_input '%s'\n", movie->file_name);
249
        return ret;
250
    }
251
11
    if ((ret = avformat_find_stream_info(movie->format_ctx, NULL)) < 0)
252
        av_log(ctx, AV_LOG_WARNING, "Failed to find stream info\n");
253
254
    // if seeking requested, we execute it
255
11
    if (movie->seek_point > 0) {
256
        timestamp = movie->seek_point;
257
        // add the stream start time, should it exist
258
        if (movie->format_ctx->start_time != AV_NOPTS_VALUE) {
259
            if (timestamp > 0 && movie->format_ctx->start_time > INT64_MAX - timestamp) {
260
                av_log(ctx, AV_LOG_ERROR,
261
                       "%s: seek value overflow with start_time:%"PRId64" seek_point:%"PRId64"\n",
262
                       movie->file_name, movie->format_ctx->start_time, movie->seek_point);
263
                return AVERROR(EINVAL);
264
            }
265
            timestamp += movie->format_ctx->start_time;
266
        }
267
        if ((ret = av_seek_frame(movie->format_ctx, -1, timestamp, AVSEEK_FLAG_BACKWARD)) < 0) {
268
            av_log(ctx, AV_LOG_ERROR, "%s: could not seek to position %"PRId64"\n",
269
                   movie->file_name, timestamp);
270
            return ret;
271
        }
272
    }
273
274
25
    for (i = 0; i < movie->format_ctx->nb_streams; i++)
275
14
        movie->format_ctx->streams[i]->discard = AVDISCARD_ALL;
276
277
11
    movie->st = av_calloc(nb_streams, sizeof(*movie->st));
278
11
    if (!movie->st)
279
        return AVERROR(ENOMEM);
280
281
22
    for (i = 0; i < nb_streams; i++) {
282
11
        spec = av_strtok(stream_specs, "+", &cursor);
283
11
        if (!spec)
284
            return AVERROR_BUG;
285
11
        stream_specs = NULL; /* for next strtok */
286
11
        st = find_stream(ctx, movie->format_ctx, spec);
287
11
        if (!st)
288
            return AVERROR(EINVAL);
289
11
        st->discard = AVDISCARD_DEFAULT;
290
11
        movie->st[i].st = st;
291
11
        movie->max_stream_index = FFMAX(movie->max_stream_index, st->index);
292
11
        movie->st[i].discontinuity_threshold =
293
11
            av_rescale_q(movie->discontinuity_threshold, AV_TIME_BASE_Q, st->time_base);
294
    }
295
11
    if (av_strtok(NULL, "+", &cursor))
296
        return AVERROR_BUG;
297
298
11
    movie->out_index = av_calloc(movie->max_stream_index + 1,
299
                                 sizeof(*movie->out_index));
300
11
    if (!movie->out_index)
301
        return AVERROR(ENOMEM);
302
22
    for (i = 0; i <= movie->max_stream_index; i++)
303
11
        movie->out_index[i] = -1;
304
22
    for (i = 0; i < nb_streams; i++) {
305
11
        AVFilterPad pad = { 0 };
306
11
        movie->out_index[movie->st[i].st->index] = i;
307
11
        pad.type          = movie->st[i].st->codecpar->codec_type;
308
11
        pad.name          = av_asprintf("out%d", i);
309
11
        if (!pad.name)
310
            return AVERROR(ENOMEM);
311
11
        pad.config_props  = movie_config_output_props;
312
11
        pad.request_frame = movie_request_frame;
313
11
        if ((ret = ff_insert_outpad(ctx, i, &pad)) < 0) {
314
            av_freep(&pad.name);
315
            return ret;
316
        }
317
11
        if ( movie->st[i].st->codecpar->codec_type == AVMEDIA_TYPE_AUDIO &&
318
3
            !movie->st[i].st->codecpar->channel_layout) {
319
            ret = guess_channel_layout(&movie->st[i], i, ctx);
320
            if (ret < 0)
321
                return ret;
322
        }
323
11
        ret = open_stream(ctx, &movie->st[i]);
324
11
        if (ret < 0)
325
            return ret;
326
    }
327
328
11
    av_log(ctx, AV_LOG_VERBOSE, "seek_point:%"PRIi64" format_name:%s file_name:%s stream_index:%d\n",
329
           movie->seek_point, movie->format_name, movie->file_name,
330
           movie->stream_index);
331
332
11
    return 0;
333
}
334
335
11
static av_cold void movie_uninit(AVFilterContext *ctx)
336
{
337
11
    MovieContext *movie = ctx->priv;
338
    int i;
339
340
22
    for (i = 0; i < ctx->nb_outputs; i++) {
341
11
        av_freep(&ctx->output_pads[i].name);
342
11
        if (movie->st[i].st)
343
11
            avcodec_free_context(&movie->st[i].codec_ctx);
344
    }
345
11
    av_freep(&movie->st);
346
11
    av_freep(&movie->out_index);
347
11
    av_packet_unref(&movie->pkt);
348
11
    if (movie->format_ctx)
349
11
        avformat_close_input(&movie->format_ctx);
350
11
}
351
352
11
static int movie_query_formats(AVFilterContext *ctx)
353
{
354
11
    MovieContext *movie = ctx->priv;
355
11
    int list[] = { 0, -1 };
356
11
    int64_t list64[] = { 0, -1 };
357
    int i, ret;
358
359
22
    for (i = 0; i < ctx->nb_outputs; i++) {
360
11
        MovieStream *st = &movie->st[i];
361
11
        AVCodecParameters *c = st->st->codecpar;
362
11
        AVFilterLink *outlink = ctx->outputs[i];
363
364
11
        switch (c->codec_type) {
365
8
        case AVMEDIA_TYPE_VIDEO:
366
8
            list[0] = c->format;
367
8
            if ((ret = ff_formats_ref(ff_make_format_list(list), &outlink->incfg.formats)) < 0)
368
                return ret;
369
8
            break;
370
3
        case AVMEDIA_TYPE_AUDIO:
371
3
            list[0] = c->format;
372
3
            if ((ret = ff_formats_ref(ff_make_format_list(list), &outlink->incfg.formats)) < 0)
373
                return ret;
374
3
            list[0] = c->sample_rate;
375
3
            if ((ret = ff_formats_ref(ff_make_format_list(list), &outlink->incfg.samplerates)) < 0)
376
                return ret;
377
3
            list64[0] = c->channel_layout;
378
3
            if ((ret = ff_channel_layouts_ref(ff_make_format64_list(list64),
379
                                   &outlink->incfg.channel_layouts)) < 0)
380
                return ret;
381
3
            break;
382
        }
383
11
    }
384
385
11
    return 0;
386
}
387
388
11
static int movie_config_output_props(AVFilterLink *outlink)
389
{
390
11
    AVFilterContext *ctx = outlink->src;
391
11
    MovieContext *movie  = ctx->priv;
392
11
    unsigned out_id = FF_OUTLINK_IDX(outlink);
393
11
    MovieStream *st = &movie->st[out_id];
394
11
    AVCodecParameters *c = st->st->codecpar;
395
396
11
    outlink->time_base = st->st->time_base;
397
398
11
    switch (c->codec_type) {
399
8
    case AVMEDIA_TYPE_VIDEO:
400
8
        outlink->w          = c->width;
401
8
        outlink->h          = c->height;
402
8
        outlink->frame_rate = st->st->r_frame_rate;
403
8
        break;
404
3
    case AVMEDIA_TYPE_AUDIO:
405
3
        break;
406
    }
407
408
11
    return 0;
409
}
410
411
static char *describe_frame_to_str(char *dst, size_t dst_size,
412
                                   AVFrame *frame, enum AVMediaType frame_type,
413
                                   AVFilterLink *link)
414
{
415
    switch (frame_type) {
416
    case AVMEDIA_TYPE_VIDEO:
417
        snprintf(dst, dst_size,
418
                 "video pts:%s time:%s size:%dx%d aspect:%d/%d",
419
                 av_ts2str(frame->pts), av_ts2timestr(frame->pts, &link->time_base),
420
                 frame->width, frame->height,
421
                 frame->sample_aspect_ratio.num,
422
                 frame->sample_aspect_ratio.den);
423
                 break;
424
    case AVMEDIA_TYPE_AUDIO:
425
        snprintf(dst, dst_size,
426
                 "audio pts:%s time:%s samples:%d",
427
                 av_ts2str(frame->pts), av_ts2timestr(frame->pts, &link->time_base),
428
                 frame->nb_samples);
429
                 break;
430
    default:
431
        snprintf(dst, dst_size, "%s BUG", av_get_media_type_string(frame_type));
432
        break;
433
    }
434
    return dst;
435
}
436
437
static int rewind_file(AVFilterContext *ctx)
438
{
439
    MovieContext *movie = ctx->priv;
440
    int64_t timestamp = movie->seek_point;
441
    int ret, i;
442
443
    if (movie->format_ctx->start_time != AV_NOPTS_VALUE)
444
        timestamp += movie->format_ctx->start_time;
445
    ret = av_seek_frame(movie->format_ctx, -1, timestamp, AVSEEK_FLAG_BACKWARD);
446
    if (ret < 0) {
447
        av_log(ctx, AV_LOG_ERROR, "Unable to loop: %s\n", av_err2str(ret));
448
        movie->loop_count = 1; /* do not try again */
449
        return ret;
450
    }
451
452
    for (i = 0; i < ctx->nb_outputs; i++) {
453
        avcodec_flush_buffers(movie->st[i].codec_ctx);
454
        movie->st[i].done = 0;
455
    }
456
    movie->eof = 0;
457
    return 0;
458
}
459
460
/**
461
 * Try to push a frame to the requested output.
462
 *
463
 * @param ctx     filter context
464
 * @param out_id  number of output where a frame is wanted;
465
 *                if the frame is read from file, used to set the return value;
466
 *                if the codec is being flushed, flush the corresponding stream
467
 * @return  1 if a frame was pushed on the requested output,
468
 *          0 if another attempt is possible,
469
 *          <0 AVERROR code
470
 */
471
3754
static int movie_push_frame(AVFilterContext *ctx, unsigned out_id)
472
{
473
3754
    MovieContext *movie = ctx->priv;
474
3754
    AVPacket *pkt = &movie->pkt;
475
    enum AVMediaType frame_type;
476
    MovieStream *st;
477
3754
    int ret, got_frame = 0, pkt_out_id;
478
    AVFilterLink *outlink;
479
    AVFrame *frame;
480
481
3754
    if (!pkt->size) {
482
3754
        if (movie->eof) {
483
71
            if (movie->st[out_id].done) {
484
11
                if (movie->loop_count != 1) {
485
                    ret = rewind_file(ctx);
486
                    if (ret < 0)
487
                        return ret;
488
                    movie->loop_count -= movie->loop_count > 1;
489
                    av_log(ctx, AV_LOG_VERBOSE, "Stream finished, looping.\n");
490
                    return 0; /* retry */
491
                }
492
11
                return AVERROR_EOF;
493
            }
494
60
            pkt->stream_index = movie->st[out_id].st->index;
495
            /* packet is already ready for flushing */
496
        } else {
497
3683
            ret = av_read_frame(movie->format_ctx, pkt);
498
3683
            if (ret < 0) {
499
11
                if (ret == AVERROR_EOF) {
500
11
                    movie->eof = 1;
501
11
                    return 0; /* start flushing */
502
                }
503
                return ret;
504
            }
505
        }
506
    }
507
508
3732
    pkt_out_id = pkt->stream_index > movie->max_stream_index ? -1 :
509
3511
                 movie->out_index[pkt->stream_index];
510
3732
    if (pkt_out_id < 0) {
511
221
        av_packet_unref(pkt);
512
221
        return 0;
513
    }
514
3511
    st = &movie->st[pkt_out_id];
515
3511
    outlink = ctx->outputs[pkt_out_id];
516
517
3511
    frame = av_frame_alloc();
518
3511
    if (!frame)
519
        return AVERROR(ENOMEM);
520
521
3511
    frame_type = st->st->codecpar->codec_type;
522
3511
    switch (frame_type) {
523
3169
    case AVMEDIA_TYPE_VIDEO:
524
3169
        ret = avcodec_decode_video2(st->codec_ctx, frame, &got_frame, pkt);
525
3169
        break;
526
342
    case AVMEDIA_TYPE_AUDIO:
527
342
        ret = avcodec_decode_audio4(st->codec_ctx, frame, &got_frame, pkt);
528
342
        break;
529
    default:
530
        ret = AVERROR(ENOSYS);
531
        break;
532
    }
533
3511
    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(pkt);
537
        return 0;
538
    }
539

3511
    if (!ret || st->st->codecpar->codec_type == AVMEDIA_TYPE_VIDEO)
540
3196
        ret = pkt->size;
541
542
3511
    pkt->data += ret;
543
3511
    pkt->size -= ret;
544
3511
    if (pkt->size <= 0)
545
3511
        av_packet_unref(pkt);
546
3511
    if (!got_frame) {
547
66
        if (!ret)
548
11
            st->done = 1;
549
66
        av_frame_free(&frame);
550
66
        return 0;
551
    }
552
553
3445
    frame->pts = frame->best_effort_timestamp;
554
3445
    if (frame->pts != AV_NOPTS_VALUE) {
555
3443
        if (movie->ts_offset)
556
            frame->pts += av_rescale_q_rnd(movie->ts_offset, AV_TIME_BASE_Q, outlink->time_base, AV_ROUND_UP);
557
3443
        if (st->discontinuity_threshold) {
558
            if (st->last_pts != AV_NOPTS_VALUE) {
559
                int64_t diff = frame->pts - st->last_pts;
560
                if (diff < 0 || diff > st->discontinuity_threshold) {
561
                    av_log(ctx, AV_LOG_VERBOSE, "Discontinuity in stream:%d diff:%"PRId64"\n", pkt_out_id, diff);
562
                    movie->ts_offset += av_rescale_q_rnd(-diff, outlink->time_base, AV_TIME_BASE_Q, AV_ROUND_UP);
563
                    frame->pts -= diff;
564
                }
565
            }
566
        }
567
3443
        st->last_pts = frame->pts;
568
    }
569
    ff_dlog(ctx, "movie_push_frame(): file:'%s' %s\n", movie->file_name,
570
            describe_frame_to_str((char[1024]){0}, 1024, frame, frame_type, outlink));
571
572
3445
    if (st->st->codecpar->codec_type == AVMEDIA_TYPE_VIDEO) {
573
3130
        if (frame->format != outlink->format) {
574
            av_log(ctx, AV_LOG_ERROR, "Format changed %s -> %s, discarding frame\n",
575
                av_get_pix_fmt_name(outlink->format),
576
                av_get_pix_fmt_name(frame->format)
577
                );
578
            av_frame_free(&frame);
579
            return 0;
580
        }
581
    }
582
3445
    ret = ff_filter_frame(outlink, frame);
583
584
3445
    if (ret < 0)
585
        return ret;
586
3445
    return pkt_out_id == out_id;
587
}
588
589
3456
static int movie_request_frame(AVFilterLink *outlink)
590
{
591
3456
    AVFilterContext *ctx = outlink->src;
592
3456
    unsigned out_id = FF_OUTLINK_IDX(outlink);
593
    int ret;
594
595
    while (1) {
596
3754
        ret = movie_push_frame(ctx, out_id);
597
3754
        if (ret)
598
3456
            return FFMIN(ret, 0);
599
    }
600
}
601
602
static int process_command(AVFilterContext *ctx, const char *cmd, const char *args,
603
                           char *res, int res_len, int flags)
604
{
605
    MovieContext *movie = ctx->priv;
606
    int ret = AVERROR(ENOSYS);
607
608
    if (!strcmp(cmd, "seek")) {
609
        int idx, flags, i;
610
        int64_t ts;
611
        char tail[2];
612
613
        if (sscanf(args, "%i|%"SCNi64"|%i %1s", &idx, &ts, &flags, tail) != 3)
614
            return AVERROR(EINVAL);
615
616
        ret = av_seek_frame(movie->format_ctx, idx, ts, flags);
617
        if (ret < 0)
618
            return ret;
619
620
        for (i = 0; i < ctx->nb_outputs; i++) {
621
            avcodec_flush_buffers(movie->st[i].codec_ctx);
622
            movie->st[i].done = 0;
623
        }
624
        return ret;
625
    } else if (!strcmp(cmd, "get_duration")) {
626
        int print_len;
627
        char tail[2];
628
629
        if (!res || res_len <= 0)
630
            return AVERROR(EINVAL);
631
632
        if (args && sscanf(args, "%1s", tail) == 1)
633
            return AVERROR(EINVAL);
634
635
        print_len = snprintf(res, res_len, "%"PRId64, movie->format_ctx->duration);
636
        if (print_len < 0 || print_len >= res_len)
637
            return AVERROR(EINVAL);
638
639
        return 0;
640
    }
641
642
    return ret;
643
}
644
645
#if CONFIG_MOVIE_FILTER
646
647
AVFILTER_DEFINE_CLASS(movie);
648
649
AVFilter ff_avsrc_movie = {
650
    .name          = "movie",
651
    .description   = NULL_IF_CONFIG_SMALL("Read from a movie source."),
652
    .priv_size     = sizeof(MovieContext),
653
    .priv_class    = &movie_class,
654
    .init          = movie_common_init,
655
    .uninit        = movie_uninit,
656
    .query_formats = movie_query_formats,
657
658
    .inputs    = NULL,
659
    .outputs   = NULL,
660
    .flags     = AVFILTER_FLAG_DYNAMIC_OUTPUTS,
661
    .process_command = process_command
662
};
663
664
#endif  /* CONFIG_MOVIE_FILTER */
665
666
#if CONFIG_AMOVIE_FILTER
667
668
#define amovie_options movie_options
669
AVFILTER_DEFINE_CLASS(amovie);
670
671
AVFilter ff_avsrc_amovie = {
672
    .name          = "amovie",
673
    .description   = NULL_IF_CONFIG_SMALL("Read audio from a movie source."),
674
    .priv_size     = sizeof(MovieContext),
675
    .init          = movie_common_init,
676
    .uninit        = movie_uninit,
677
    .query_formats = movie_query_formats,
678
679
    .inputs     = NULL,
680
    .outputs    = NULL,
681
    .priv_class = &amovie_class,
682
    .flags      = AVFILTER_FLAG_DYNAMIC_OUTPUTS,
683
    .process_command = process_command,
684
};
685
686
#endif /* CONFIG_AMOVIE_FILTER */