GCC Code Coverage Report
Directory: ../../../ffmpeg/ Exec Total Coverage
File: src/libavfilter/src_movie.c Lines: 193 350 55.1 %
Date: 2020-08-13 15:06:06 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, 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
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
    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
    char name[16];
217
    AVStream *st;
218
219
11
    if (!movie->file_name) {
220
        av_log(ctx, AV_LOG_ERROR, "No filename provided!\n");
221
        return AVERROR(EINVAL);
222
    }
223
224
11
    movie->seek_point = movie->seek_point_d * 1000000 + 0.5;
225
226
11
    stream_specs = movie->stream_specs;
227
11
    if (!stream_specs) {
228
11
        snprintf(default_streams, sizeof(default_streams), "d%c%d",
229
11
                 !strcmp(ctx->filter->name, "amovie") ? 'a' : 'v',
230
                 movie->stream_index);
231
11
        stream_specs = default_streams;
232
    }
233
55
    for (cursor = stream_specs; *cursor; cursor++)
234
44
        if (*cursor == '+')
235
            nb_streams++;
236
237

11
    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
11
    iformat = movie->format_name ? av_find_input_format(movie->format_name) : NULL;
245
246
11
    movie->format_ctx = NULL;
247
11
    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
11
    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
11
    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
25
    for (i = 0; i < movie->format_ctx->nb_streams; i++)
276
14
        movie->format_ctx->streams[i]->discard = AVDISCARD_ALL;
277
278
11
    movie->st = av_calloc(nb_streams, sizeof(*movie->st));
279
11
    if (!movie->st)
280
        return AVERROR(ENOMEM);
281
282
22
    for (i = 0; i < nb_streams; i++) {
283
11
        spec = av_strtok(stream_specs, "+", &cursor);
284
11
        if (!spec)
285
            return AVERROR_BUG;
286
11
        stream_specs = NULL; /* for next strtok */
287
11
        st = find_stream(ctx, movie->format_ctx, spec);
288
11
        if (!st)
289
            return AVERROR(EINVAL);
290
11
        st->discard = AVDISCARD_DEFAULT;
291
11
        movie->st[i].st = st;
292
11
        movie->max_stream_index = FFMAX(movie->max_stream_index, st->index);
293
11
        movie->st[i].discontinuity_threshold =
294
11
            av_rescale_q(movie->discontinuity_threshold, AV_TIME_BASE_Q, st->time_base);
295
    }
296
11
    if (av_strtok(NULL, "+", &cursor))
297
        return AVERROR_BUG;
298
299
11
    movie->out_index = av_calloc(movie->max_stream_index + 1,
300
                                 sizeof(*movie->out_index));
301
11
    if (!movie->out_index)
302
        return AVERROR(ENOMEM);
303
22
    for (i = 0; i <= movie->max_stream_index; i++)
304
11
        movie->out_index[i] = -1;
305
22
    for (i = 0; i < nb_streams; i++) {
306
11
        AVFilterPad pad = { 0 };
307
11
        movie->out_index[movie->st[i].st->index] = i;
308
11
        snprintf(name, sizeof(name), "out%d", i);
309
11
        pad.type          = movie->st[i].st->codecpar->codec_type;
310
11
        pad.name          = av_strdup(name);
311
11
        if (!pad.name)
312
            return AVERROR(ENOMEM);
313
11
        pad.config_props  = movie_config_output_props;
314
11
        pad.request_frame = movie_request_frame;
315
11
        if ((ret = ff_insert_outpad(ctx, i, &pad)) < 0) {
316
            av_freep(&pad.name);
317
            return ret;
318
        }
319
11
        if ( movie->st[i].st->codecpar->codec_type == AVMEDIA_TYPE_AUDIO &&
320
3
            !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
11
        ret = open_stream(ctx, &movie->st[i]);
326
11
        if (ret < 0)
327
            return ret;
328
    }
329
330
11
    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
11
    return 0;
335
}
336
337
11
static av_cold void movie_uninit(AVFilterContext *ctx)
338
{
339
11
    MovieContext *movie = ctx->priv;
340
    int i;
341
342
22
    for (i = 0; i < ctx->nb_outputs; i++) {
343
11
        av_freep(&ctx->output_pads[i].name);
344
11
        if (movie->st[i].st)
345
11
            avcodec_free_context(&movie->st[i].codec_ctx);
346
    }
347
11
    av_freep(&movie->st);
348
11
    av_freep(&movie->out_index);
349
11
    if (movie->format_ctx)
350
11
        avformat_close_input(&movie->format_ctx);
351
11
}
352
353
11
static int movie_query_formats(AVFilterContext *ctx)
354
{
355
11
    MovieContext *movie = ctx->priv;
356
11
    int list[] = { 0, -1 };
357
11
    int64_t list64[] = { 0, -1 };
358
    int i, ret;
359
360
22
    for (i = 0; i < ctx->nb_outputs; i++) {
361
11
        MovieStream *st = &movie->st[i];
362
11
        AVCodecParameters *c = st->st->codecpar;
363
11
        AVFilterLink *outlink = ctx->outputs[i];
364
365
11
        switch (c->codec_type) {
366
8
        case AVMEDIA_TYPE_VIDEO:
367
8
            list[0] = c->format;
368
8
            if ((ret = ff_formats_ref(ff_make_format_list(list), &outlink->in_formats)) < 0)
369
                return ret;
370
8
            break;
371
3
        case AVMEDIA_TYPE_AUDIO:
372
3
            list[0] = c->format;
373
3
            if ((ret = ff_formats_ref(ff_make_format_list(list), &outlink->in_formats)) < 0)
374
                return ret;
375
3
            list[0] = c->sample_rate;
376
3
            if ((ret = ff_formats_ref(ff_make_format_list(list), &outlink->in_samplerates)) < 0)
377
                return ret;
378
3
            list64[0] = c->channel_layout;
379
3
            if ((ret = ff_channel_layouts_ref(ff_make_format64_list(list64),
380
3
                                   &outlink->in_channel_layouts)) < 0)
381
                return ret;
382
3
            break;
383
        }
384
11
    }
385
386
11
    return 0;
387
}
388
389
11
static int movie_config_output_props(AVFilterLink *outlink)
390
{
391
11
    AVFilterContext *ctx = outlink->src;
392
11
    MovieContext *movie  = ctx->priv;
393
11
    unsigned out_id = FF_OUTLINK_IDX(outlink);
394
11
    MovieStream *st = &movie->st[out_id];
395
11
    AVCodecParameters *c = st->st->codecpar;
396
397
11
    outlink->time_base = st->st->time_base;
398
399
11
    switch (c->codec_type) {
400
8
    case AVMEDIA_TYPE_VIDEO:
401
8
        outlink->w          = c->width;
402
8
        outlink->h          = c->height;
403
8
        outlink->frame_rate = st->st->r_frame_rate;
404
8
        break;
405
3
    case AVMEDIA_TYPE_AUDIO:
406
3
        break;
407
    }
408
409
11
    return 0;
410
}
411
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
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
 */
472
3754
static int movie_push_frame(AVFilterContext *ctx, unsigned out_id)
473
{
474
3754
    MovieContext *movie = ctx->priv;
475
3754
    AVPacket *pkt = &movie->pkt;
476
    enum AVMediaType frame_type;
477
    MovieStream *st;
478
3754
    int ret, got_frame = 0, pkt_out_id;
479
    AVFilterLink *outlink;
480
    AVFrame *frame;
481
482
3754
    if (!pkt->size) {
483
3754
        if (movie->eof) {
484
71
            if (movie->st[out_id].done) {
485
11
                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
11
                return AVERROR_EOF;
494
            }
495
60
            pkt->stream_index = movie->st[out_id].st->index;
496
            /* packet is already ready for flushing */
497
        } else {
498
3683
            ret = av_read_frame(movie->format_ctx, &movie->pkt0);
499
3683
            if (ret < 0) {
500
11
                av_init_packet(&movie->pkt0); /* ready for flushing */
501
11
                *pkt = movie->pkt0;
502
11
                if (ret == AVERROR_EOF) {
503
11
                    movie->eof = 1;
504
11
                    return 0; /* start flushing */
505
                }
506
                return ret;
507
            }
508
3672
            *pkt = movie->pkt0;
509
        }
510
    }
511
512
3732
    pkt_out_id = pkt->stream_index > movie->max_stream_index ? -1 :
513
3511
                 movie->out_index[pkt->stream_index];
514
3732
    if (pkt_out_id < 0) {
515
221
        av_packet_unref(&movie->pkt0);
516
221
        pkt->size = 0; /* ready for next run */
517
221
        pkt->data = NULL;
518
221
        return 0;
519
    }
520
3511
    st = &movie->st[pkt_out_id];
521
3511
    outlink = ctx->outputs[pkt_out_id];
522
523
3511
    frame = av_frame_alloc();
524
3511
    if (!frame)
525
        return AVERROR(ENOMEM);
526
527
3511
    frame_type = st->st->codecpar->codec_type;
528
3511
    switch (frame_type) {
529
3169
    case AVMEDIA_TYPE_VIDEO:
530
3169
        ret = avcodec_decode_video2(st->codec_ctx, frame, &got_frame, pkt);
531
3169
        break;
532
342
    case AVMEDIA_TYPE_AUDIO:
533
342
        ret = avcodec_decode_audio4(st->codec_ctx, frame, &got_frame, pkt);
534
342
        break;
535
    default:
536
        ret = AVERROR(ENOSYS);
537
        break;
538
    }
539
3511
    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

3511
    if (!ret || st->st->codecpar->codec_type == AVMEDIA_TYPE_VIDEO)
548
3196
        ret = pkt->size;
549
550
3511
    pkt->data += ret;
551
3511
    pkt->size -= ret;
552
3511
    if (pkt->size <= 0) {
553
3511
        av_packet_unref(&movie->pkt0);
554
3511
        pkt->size = 0; /* ready for next run */
555
3511
        pkt->data = NULL;
556
    }
557
3511
    if (!got_frame) {
558
66
        if (!ret)
559
11
            st->done = 1;
560
66
        av_frame_free(&frame);
561
66
        return 0;
562
    }
563
564
3445
    frame->pts = frame->best_effort_timestamp;
565
3445
    if (frame->pts != AV_NOPTS_VALUE) {
566
3443
        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
3443
        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
3443
        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
3445
    if (st->st->codecpar->codec_type == AVMEDIA_TYPE_VIDEO) {
584
3130
        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
3445
    ret = ff_filter_frame(outlink, frame);
594
595
3445
    if (ret < 0)
596
        return ret;
597
3445
    return pkt_out_id == out_id;
598
}
599
600
3456
static int movie_request_frame(AVFilterLink *outlink)
601
{
602
3456
    AVFilterContext *ctx = outlink->src;
603
3456
    unsigned out_id = FF_OUTLINK_IDX(outlink);
604
    int ret;
605
606
    while (1) {
607
3754
        ret = movie_push_frame(ctx, out_id);
608
3754
        if (ret)
609
3456
            return FFMIN(ret, 0);
610
    }
611
}
612
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 */