GCC Code Coverage Report
Directory: ../../../ffmpeg/ Exec Total Coverage
File: src/libavfilter/buffersrc.c Lines: 140 202 69.3 %
Date: 2020-08-13 15:06:06 Branches: 77 150 51.3 %

Line Branch Exec Source
1
/*
2
 * Copyright (c) 2008 Vitor Sessak
3
 *
4
 * This file is part of FFmpeg.
5
 *
6
 * FFmpeg is free software; you can redistribute it and/or
7
 * modify it under the terms of the GNU Lesser General Public
8
 * License as published by the Free Software Foundation; either
9
 * version 2.1 of the License, or (at your option) any later version.
10
 *
11
 * FFmpeg is distributed in the hope that it will be useful,
12
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
14
 * Lesser General Public License for more details.
15
 *
16
 * You should have received a copy of the GNU Lesser General Public
17
 * License along with FFmpeg; if not, write to the Free Software
18
 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
19
 */
20
21
/**
22
 * @file
23
 * memory buffer source filter
24
 */
25
26
#include <float.h>
27
28
#include "libavutil/avassert.h"
29
#include "libavutil/channel_layout.h"
30
#include "libavutil/common.h"
31
#include "libavutil/frame.h"
32
#include "libavutil/imgutils.h"
33
#include "libavutil/internal.h"
34
#include "libavutil/opt.h"
35
#include "libavutil/samplefmt.h"
36
#include "libavutil/timestamp.h"
37
#include "audio.h"
38
#include "avfilter.h"
39
#include "buffersrc.h"
40
#include "formats.h"
41
#include "internal.h"
42
#include "video.h"
43
44
typedef struct BufferSourceContext {
45
    const AVClass    *class;
46
    AVRational        time_base;     ///< time_base to set in the output link
47
    AVRational        frame_rate;    ///< frame_rate to set in the output link
48
    unsigned          nb_failed_requests;
49
50
    /* video only */
51
    int               w, h;
52
    enum AVPixelFormat  pix_fmt;
53
    AVRational        pixel_aspect;
54
#if FF_API_SWS_PARAM_OPTION
55
    char              *sws_param;
56
#endif
57
58
    AVBufferRef *hw_frames_ctx;
59
60
    /* audio only */
61
    int sample_rate;
62
    enum AVSampleFormat sample_fmt;
63
    int channels;
64
    uint64_t channel_layout;
65
    char    *channel_layout_str;
66
67
    int eof;
68
} BufferSourceContext;
69
70
#define CHECK_VIDEO_PARAM_CHANGE(s, c, width, height, format, pts)\
71
    if (c->w != width || c->h != height || c->pix_fmt != format) {\
72
        av_log(s, AV_LOG_INFO, "filter context - w: %d h: %d fmt: %d, incoming frame - w: %d h: %d fmt: %d pts_time: %s\n",\
73
               c->w, c->h, c->pix_fmt, width, height, format, av_ts2timestr(pts, &s->outputs[0]->time_base));\
74
        av_log(s, AV_LOG_WARNING, "Changing video frame properties on the fly is not supported by all filters.\n");\
75
    }
76
77
#define CHECK_AUDIO_PARAM_CHANGE(s, c, srate, ch_layout, ch_count, format, pts)\
78
    if (c->sample_fmt != format || c->sample_rate != srate ||\
79
        c->channel_layout != ch_layout || c->channels != ch_count) {\
80
        av_log(s, AV_LOG_INFO, "filter context - fmt: %s r: %d layout: %"PRIX64" ch: %d, incoming frame - fmt: %s r: %d layout: %"PRIX64" ch: %d pts_time: %s\n",\
81
               av_get_sample_fmt_name(c->sample_fmt), c->sample_rate, c->channel_layout, c->channels,\
82
               av_get_sample_fmt_name(format), srate, ch_layout, ch_count, av_ts2timestr(pts, &s->outputs[0]->time_base));\
83
        av_log(s, AV_LOG_ERROR, "Changing audio frame properties on the fly is not supported.\n");\
84
        return AVERROR(EINVAL);\
85
    }
86
87
4672
AVBufferSrcParameters *av_buffersrc_parameters_alloc(void)
88
{
89
4672
    AVBufferSrcParameters *par = av_mallocz(sizeof(*par));
90
4672
    if (!par)
91
        return NULL;
92
93
4672
    par->format = -1;
94
95
4672
    return par;
96
}
97
98
4672
int av_buffersrc_parameters_set(AVFilterContext *ctx, AVBufferSrcParameters *param)
99
{
100
4672
    BufferSourceContext *s = ctx->priv;
101
102

4672
    if (param->time_base.num > 0 && param->time_base.den > 0)
103
        s->time_base = param->time_base;
104
105
4672
    switch (ctx->filter->outputs[0].type) {
106
4672
    case AVMEDIA_TYPE_VIDEO:
107
4672
        if (param->format != AV_PIX_FMT_NONE) {
108
            s->pix_fmt = param->format;
109
        }
110
4672
        if (param->width > 0)
111
            s->w = param->width;
112
4672
        if (param->height > 0)
113
            s->h = param->height;
114

4672
        if (param->sample_aspect_ratio.num > 0 && param->sample_aspect_ratio.den > 0)
115
            s->pixel_aspect = param->sample_aspect_ratio;
116

4672
        if (param->frame_rate.num > 0 && param->frame_rate.den > 0)
117
            s->frame_rate = param->frame_rate;
118
4672
        if (param->hw_frames_ctx) {
119
            av_buffer_unref(&s->hw_frames_ctx);
120
            s->hw_frames_ctx = av_buffer_ref(param->hw_frames_ctx);
121
            if (!s->hw_frames_ctx)
122
                return AVERROR(ENOMEM);
123
        }
124
4672
        break;
125
    case AVMEDIA_TYPE_AUDIO:
126
        if (param->format != AV_SAMPLE_FMT_NONE) {
127
            s->sample_fmt = param->format;
128
        }
129
        if (param->sample_rate > 0)
130
            s->sample_rate = param->sample_rate;
131
        if (param->channel_layout)
132
            s->channel_layout = param->channel_layout;
133
        break;
134
    default:
135
        return AVERROR_BUG;
136
    }
137
138
4672
    return 0;
139
}
140
141
int attribute_align_arg av_buffersrc_write_frame(AVFilterContext *ctx, const AVFrame *frame)
142
{
143
    return av_buffersrc_add_frame_flags(ctx, (AVFrame *)frame,
144
                                        AV_BUFFERSRC_FLAG_KEEP_REF);
145
}
146
147
24
int attribute_align_arg av_buffersrc_add_frame(AVFilterContext *ctx, AVFrame *frame)
148
{
149
24
    return av_buffersrc_add_frame_flags(ctx, frame, 0);
150
}
151
152
static int av_buffersrc_add_frame_internal(AVFilterContext *ctx,
153
                                           AVFrame *frame, int flags);
154
155
424966
int attribute_align_arg av_buffersrc_add_frame_flags(AVFilterContext *ctx, AVFrame *frame, int flags)
156
{
157
424966
    AVFrame *copy = NULL;
158
424966
    int ret = 0;
159
160

424966
    if (frame && frame->channel_layout &&
161
324314
        av_get_channel_layout_nb_channels(frame->channel_layout) != frame->channels) {
162
        av_log(ctx, AV_LOG_ERROR, "Layout indicates a different number of channels than actually present\n");
163
        return AVERROR(EINVAL);
164
    }
165
166

424966
    if (!(flags & AV_BUFFERSRC_FLAG_KEEP_REF) || !frame)
167
424537
        return av_buffersrc_add_frame_internal(ctx, frame, flags);
168
169
429
    if (!(copy = av_frame_alloc()))
170
        return AVERROR(ENOMEM);
171
429
    ret = av_frame_ref(copy, frame);
172
429
    if (ret >= 0)
173
429
        ret = av_buffersrc_add_frame_internal(ctx, copy, flags);
174
175
429
    av_frame_free(&copy);
176
429
    return ret;
177
}
178
179
3200847
static int push_frame(AVFilterGraph *graph)
180
{
181
    int ret;
182
183
    while (1) {
184
3200847
        ret = ff_filter_graph_run_once(graph);
185
3200847
        if (ret == AVERROR(EAGAIN))
186
430683
            break;
187
2770164
        if (ret < 0)
188
            return ret;
189
    }
190
430683
    return 0;
191
}
192
193
424966
static int av_buffersrc_add_frame_internal(AVFilterContext *ctx,
194
                                           AVFrame *frame, int flags)
195
{
196
424966
    BufferSourceContext *s = ctx->priv;
197
    AVFrame *copy;
198
    int refcounted, ret;
199
200
424966
    s->nb_failed_requests = 0;
201
202
424966
    if (!frame)
203
5
        return av_buffersrc_close(ctx, AV_NOPTS_VALUE, flags);
204
424961
    if (s->eof)
205
        return AVERROR(EINVAL);
206
207
424961
    refcounted = !!frame->buf[0];
208
209
424961
    if (!(flags & AV_BUFFERSRC_FLAG_NO_CHECK_FORMAT)) {
210
211
424961
        switch (ctx->outputs[0]->type) {
212
99552
        case AVMEDIA_TYPE_VIDEO:
213

99552
            CHECK_VIDEO_PARAM_CHANGE(ctx, s, frame->width, frame->height,
214
                                     frame->format, frame->pts);
215
99552
            break;
216
325409
        case AVMEDIA_TYPE_AUDIO:
217
            /* For layouts unknown on input but known on link after negotiation. */
218
325409
            if (!frame->channel_layout)
219
1095
                frame->channel_layout = s->channel_layout;
220


325409
            CHECK_AUDIO_PARAM_CHANGE(ctx, s, frame->sample_rate, frame->channel_layout,
221
                                     frame->channels, frame->format, frame->pts);
222
325409
            break;
223
        default:
224
            return AVERROR(EINVAL);
225
        }
226
227
    }
228
229
424961
    if (!(copy = av_frame_alloc()))
230
        return AVERROR(ENOMEM);
231
232
424961
    if (refcounted) {
233
424961
        av_frame_move_ref(copy, frame);
234
    } else {
235
        ret = av_frame_ref(copy, frame);
236
        if (ret < 0) {
237
            av_frame_free(&copy);
238
            return ret;
239
        }
240
    }
241
242
424961
    ret = ff_filter_frame(ctx->outputs[0], copy);
243
424961
    if (ret < 0)
244
        return ret;
245
246
424961
    if ((flags & AV_BUFFERSRC_FLAG_PUSH)) {
247
424942
        ret = push_frame(ctx->graph);
248
424942
        if (ret < 0)
249
            return ret;
250
    }
251
252
424961
    return 0;
253
}
254
255
5746
int av_buffersrc_close(AVFilterContext *ctx, int64_t pts, unsigned flags)
256
{
257
5746
    BufferSourceContext *s = ctx->priv;
258
259
5746
    s->eof = 1;
260
5746
    ff_avfilter_link_set_in_status(ctx->outputs[0], AVERROR_EOF, pts);
261
5746
    return (flags & AV_BUFFERSRC_FLAG_PUSH) ? push_frame(ctx->graph) : 0;
262
}
263
264
4672
static av_cold int init_video(AVFilterContext *ctx)
265
{
266
4672
    BufferSourceContext *c = ctx->priv;
267
268


9344
    if (c->pix_fmt == AV_PIX_FMT_NONE || !c->w || !c->h ||
269
4672
        av_q2d(c->time_base) <= 0) {
270
        av_log(ctx, AV_LOG_ERROR, "Invalid parameters provided.\n");
271
        return AVERROR(EINVAL);
272
    }
273
274
4672
    av_log(ctx, AV_LOG_VERBOSE, "w:%d h:%d pixfmt:%s tb:%d/%d fr:%d/%d sar:%d/%d\n",
275
           c->w, c->h, av_get_pix_fmt_name(c->pix_fmt),
276
           c->time_base.num, c->time_base.den, c->frame_rate.num, c->frame_rate.den,
277
           c->pixel_aspect.num, c->pixel_aspect.den);
278
279
#if FF_API_SWS_PARAM_OPTION
280
4672
    if (c->sws_param)
281
        av_log(ctx, AV_LOG_WARNING, "sws_param option is deprecated and ignored\n");
282
#endif
283
284
4672
    return 0;
285
}
286
287
410987
unsigned av_buffersrc_get_nb_failed_requests(AVFilterContext *buffer_src)
288
{
289
410987
    return ((BufferSourceContext *)buffer_src->priv)->nb_failed_requests;
290
}
291
292
#define OFFSET(x) offsetof(BufferSourceContext, x)
293
#define A AV_OPT_FLAG_FILTERING_PARAM|AV_OPT_FLAG_AUDIO_PARAM
294
#define V AV_OPT_FLAG_FILTERING_PARAM|AV_OPT_FLAG_VIDEO_PARAM
295
296
static const AVOption buffer_options[] = {
297
    { "width",         NULL,                     OFFSET(w),                AV_OPT_TYPE_INT,      { .i64 = 0 }, 0, INT_MAX, V },
298
    { "video_size",    NULL,                     OFFSET(w),                AV_OPT_TYPE_IMAGE_SIZE,                .flags = V },
299
    { "height",        NULL,                     OFFSET(h),                AV_OPT_TYPE_INT,      { .i64 = 0 }, 0, INT_MAX, V },
300
    { "pix_fmt",       NULL,                     OFFSET(pix_fmt),          AV_OPT_TYPE_PIXEL_FMT, { .i64 = AV_PIX_FMT_NONE }, .min = AV_PIX_FMT_NONE, .max = INT_MAX, .flags = V },
301
    { "sar",           "sample aspect ratio",    OFFSET(pixel_aspect),     AV_OPT_TYPE_RATIONAL, { .dbl = 0 }, 0, DBL_MAX, V },
302
    { "pixel_aspect",  "sample aspect ratio",    OFFSET(pixel_aspect),     AV_OPT_TYPE_RATIONAL, { .dbl = 0 }, 0, DBL_MAX, V },
303
    { "time_base",     NULL,                     OFFSET(time_base),        AV_OPT_TYPE_RATIONAL, { .dbl = 0 }, 0, DBL_MAX, V },
304
    { "frame_rate",    NULL,                     OFFSET(frame_rate),       AV_OPT_TYPE_RATIONAL, { .dbl = 0 }, 0, DBL_MAX, V },
305
#if FF_API_SWS_PARAM_OPTION
306
    { "sws_param",     NULL,                     OFFSET(sws_param),        AV_OPT_TYPE_STRING,                    .flags = V },
307
#endif
308
    { NULL },
309
};
310
311
AVFILTER_DEFINE_CLASS(buffer);
312
313
static const AVOption abuffer_options[] = {
314
    { "time_base",      NULL, OFFSET(time_base),           AV_OPT_TYPE_RATIONAL, { .dbl = 0 }, 0, INT_MAX, A },
315
    { "sample_rate",    NULL, OFFSET(sample_rate),         AV_OPT_TYPE_INT,      { .i64 = 0 }, 0, INT_MAX, A },
316
    { "sample_fmt",     NULL, OFFSET(sample_fmt),          AV_OPT_TYPE_SAMPLE_FMT, { .i64 = AV_SAMPLE_FMT_NONE }, .min = AV_SAMPLE_FMT_NONE, .max = INT_MAX, .flags = A },
317
    { "channel_layout", NULL, OFFSET(channel_layout_str),  AV_OPT_TYPE_STRING,             .flags = A },
318
    { "channels",       NULL, OFFSET(channels),            AV_OPT_TYPE_INT,      { .i64 = 0 }, 0, INT_MAX, A },
319
    { NULL },
320
};
321
322
AVFILTER_DEFINE_CLASS(abuffer);
323
324
1122
static av_cold int init_audio(AVFilterContext *ctx)
325
{
326
1122
    BufferSourceContext *s = ctx->priv;
327
1122
    int ret = 0;
328
329
1122
    if (s->sample_fmt == AV_SAMPLE_FMT_NONE) {
330
        av_log(ctx, AV_LOG_ERROR, "Sample format was not set or was invalid\n");
331
        return AVERROR(EINVAL);
332
    }
333
334

1122
    if (s->channel_layout_str || s->channel_layout) {
335
        int n;
336
337
1116
        if (!s->channel_layout) {
338
1116
            s->channel_layout = av_get_channel_layout(s->channel_layout_str);
339
1116
            if (!s->channel_layout) {
340
                av_log(ctx, AV_LOG_ERROR, "Invalid channel layout %s.\n",
341
                       s->channel_layout_str);
342
                return AVERROR(EINVAL);
343
            }
344
        }
345
1116
        n = av_get_channel_layout_nb_channels(s->channel_layout);
346
1116
        if (s->channels) {
347
            if (n != s->channels) {
348
                av_log(ctx, AV_LOG_ERROR,
349
                       "Mismatching channel count %d and layout '%s' "
350
                       "(%d channels)\n",
351
                       s->channels, s->channel_layout_str, n);
352
                return AVERROR(EINVAL);
353
            }
354
        }
355
1116
        s->channels = n;
356
6
    } else if (!s->channels) {
357
        av_log(ctx, AV_LOG_ERROR, "Neither number of channels nor "
358
                                  "channel layout specified\n");
359
        return AVERROR(EINVAL);
360
    }
361
362
1122
    if (!s->time_base.num)
363
        s->time_base = (AVRational){1, s->sample_rate};
364
365
1122
    av_log(ctx, AV_LOG_VERBOSE,
366
           "tb:%d/%d samplefmt:%s samplerate:%d chlayout:%s\n",
367
           s->time_base.num, s->time_base.den, av_get_sample_fmt_name(s->sample_fmt),
368
           s->sample_rate, s->channel_layout_str);
369
370
1122
    return ret;
371
}
372
373
5794
static av_cold void uninit(AVFilterContext *ctx)
374
{
375
5794
    BufferSourceContext *s = ctx->priv;
376
5794
    av_buffer_unref(&s->hw_frames_ctx);
377
5794
}
378
379
5794
static int query_formats(AVFilterContext *ctx)
380
{
381
5794
    BufferSourceContext *c = ctx->priv;
382
5794
    AVFilterChannelLayouts *channel_layouts = NULL;
383
5794
    AVFilterFormats *formats = NULL;
384
5794
    AVFilterFormats *samplerates = NULL;
385
    int ret;
386
387
5794
    switch (ctx->outputs[0]->type) {
388
4672
    case AVMEDIA_TYPE_VIDEO:
389

9344
        if ((ret = ff_add_format         (&formats, c->pix_fmt)) < 0 ||
390
4672
            (ret = ff_set_common_formats (ctx     , formats   )) < 0)
391
            return ret;
392
4672
        break;
393
1122
    case AVMEDIA_TYPE_AUDIO:
394

2244
        if ((ret = ff_add_format             (&formats    , c->sample_fmt )) < 0 ||
395
2244
            (ret = ff_set_common_formats     (ctx         , formats       )) < 0 ||
396
2244
            (ret = ff_add_format             (&samplerates, c->sample_rate)) < 0 ||
397
1122
            (ret = ff_set_common_samplerates (ctx         , samplerates   )) < 0)
398
            return ret;
399
400
1122
        if ((ret = ff_add_channel_layout(&channel_layouts,
401
1122
                              c->channel_layout ? c->channel_layout :
402
6
                              FF_COUNT2LAYOUT(c->channels))) < 0)
403
            return ret;
404
1122
        if ((ret = ff_set_common_channel_layouts(ctx, channel_layouts)) < 0)
405
            return ret;
406
1122
        break;
407
    default:
408
        return AVERROR(EINVAL);
409
    }
410
411
5794
    return 0;
412
}
413
414
5794
static int config_props(AVFilterLink *link)
415
{
416
5794
    BufferSourceContext *c = link->src->priv;
417
418
5794
    switch (link->type) {
419
4672
    case AVMEDIA_TYPE_VIDEO:
420
4672
        link->w = c->w;
421
4672
        link->h = c->h;
422
4672
        link->sample_aspect_ratio = c->pixel_aspect;
423
424
4672
        if (c->hw_frames_ctx) {
425
            link->hw_frames_ctx = av_buffer_ref(c->hw_frames_ctx);
426
            if (!link->hw_frames_ctx)
427
                return AVERROR(ENOMEM);
428
        }
429
4672
        break;
430
1122
    case AVMEDIA_TYPE_AUDIO:
431
1122
        if (!c->channel_layout)
432
6
            c->channel_layout = link->channel_layout;
433
1122
        break;
434
    default:
435
        return AVERROR(EINVAL);
436
    }
437
438
5794
    link->time_base = c->time_base;
439
5794
    link->frame_rate = c->frame_rate;
440
5794
    return 0;
441
}
442
443
393015
static int request_frame(AVFilterLink *link)
444
{
445
393015
    BufferSourceContext *c = link->src->priv;
446
447
393015
    if (c->eof)
448
        return AVERROR_EOF;
449
393015
    c->nb_failed_requests++;
450
393015
    return AVERROR(EAGAIN);
451
}
452
453
static const AVFilterPad avfilter_vsrc_buffer_outputs[] = {
454
    {
455
        .name          = "default",
456
        .type          = AVMEDIA_TYPE_VIDEO,
457
        .request_frame = request_frame,
458
        .config_props  = config_props,
459
    },
460
    { NULL }
461
};
462
463
AVFilter ff_vsrc_buffer = {
464
    .name      = "buffer",
465
    .description = NULL_IF_CONFIG_SMALL("Buffer video frames, and make them accessible to the filterchain."),
466
    .priv_size = sizeof(BufferSourceContext),
467
    .query_formats = query_formats,
468
469
    .init      = init_video,
470
    .uninit    = uninit,
471
472
    .inputs    = NULL,
473
    .outputs   = avfilter_vsrc_buffer_outputs,
474
    .priv_class = &buffer_class,
475
};
476
477
static const AVFilterPad avfilter_asrc_abuffer_outputs[] = {
478
    {
479
        .name          = "default",
480
        .type          = AVMEDIA_TYPE_AUDIO,
481
        .request_frame = request_frame,
482
        .config_props  = config_props,
483
    },
484
    { NULL }
485
};
486
487
AVFilter ff_asrc_abuffer = {
488
    .name          = "abuffer",
489
    .description   = NULL_IF_CONFIG_SMALL("Buffer audio frames, and make them accessible to the filterchain."),
490
    .priv_size     = sizeof(BufferSourceContext),
491
    .query_formats = query_formats,
492
493
    .init      = init_audio,
494
    .uninit    = uninit,
495
496
    .inputs    = NULL,
497
    .outputs   = avfilter_asrc_abuffer_outputs,
498
    .priv_class = &abuffer_class,
499
};