GCC Code Coverage Report
Directory: ../../../ffmpeg/ Exec Total Coverage
File: src/libavfilter/buffersrc.c Lines: 131 190 68.9 %
Date: 2021-04-15 16:04:23 Branches: 75 144 52.1 %

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
4691
AVBufferSrcParameters *av_buffersrc_parameters_alloc(void)
88
{
89
4691
    AVBufferSrcParameters *par = av_mallocz(sizeof(*par));
90
4691
    if (!par)
91
        return NULL;
92
93
4691
    par->format = -1;
94
95
4691
    return par;
96
}
97
98
4691
int av_buffersrc_parameters_set(AVFilterContext *ctx, AVBufferSrcParameters *param)
99
{
100
4691
    BufferSourceContext *s = ctx->priv;
101
102

4691
    if (param->time_base.num > 0 && param->time_base.den > 0)
103
        s->time_base = param->time_base;
104
105
4691
    switch (ctx->filter->outputs[0].type) {
106
4691
    case AVMEDIA_TYPE_VIDEO:
107
4691
        if (param->format != AV_PIX_FMT_NONE) {
108
            s->pix_fmt = param->format;
109
        }
110
4691
        if (param->width > 0)
111
            s->w = param->width;
112
4691
        if (param->height > 0)
113
            s->h = param->height;
114

4691
        if (param->sample_aspect_ratio.num > 0 && param->sample_aspect_ratio.den > 0)
115
            s->pixel_aspect = param->sample_aspect_ratio;
116

4691
        if (param->frame_rate.num > 0 && param->frame_rate.den > 0)
117
            s->frame_rate = param->frame_rate;
118
4691
        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
4691
        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
4691
    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
2707251
static int push_frame(AVFilterGraph *graph)
153
{
154
    int ret;
155
156
    while (1) {
157
2707251
        ret = ff_filter_graph_run_once(graph);
158
2707251
        if (ret == AVERROR(EAGAIN))
159
386060
            break;
160
2321191
        if (ret < 0)
161
            return ret;
162
    }
163
386060
    return 0;
164
}
165
166
380313
int attribute_align_arg av_buffersrc_add_frame_flags(AVFilterContext *ctx, AVFrame *frame, int flags)
167
{
168
380313
    BufferSourceContext *s = ctx->priv;
169
    AVFrame *copy;
170
    int refcounted, ret;
171
172

380313
    if (frame && frame->channel_layout &&
173
279685
        av_get_channel_layout_nb_channels(frame->channel_layout) != frame->channels) {
174
        av_log(ctx, AV_LOG_ERROR, "Layout indicates a different number of channels than actually present\n");
175
        return AVERROR(EINVAL);
176
    }
177
178
380313
    s->nb_failed_requests = 0;
179
180
380313
    if (!frame)
181
5
        return av_buffersrc_close(ctx, AV_NOPTS_VALUE, flags);
182
380308
    if (s->eof)
183
        return AVERROR(EINVAL);
184
185
380308
    refcounted = !!frame->buf[0];
186
187
380308
    if (!(flags & AV_BUFFERSRC_FLAG_NO_CHECK_FORMAT)) {
188
189
380308
        switch (ctx->outputs[0]->type) {
190
99786
        case AVMEDIA_TYPE_VIDEO:
191

99786
            CHECK_VIDEO_PARAM_CHANGE(ctx, s, frame->width, frame->height,
192
                                     frame->format, frame->pts);
193
99786
            break;
194
280522
        case AVMEDIA_TYPE_AUDIO:
195
            /* For layouts unknown on input but known on link after negotiation. */
196
280522
            if (!frame->channel_layout)
197
837
                frame->channel_layout = s->channel_layout;
198


280522
            CHECK_AUDIO_PARAM_CHANGE(ctx, s, frame->sample_rate, frame->channel_layout,
199
                                     frame->channels, frame->format, frame->pts);
200
280522
            break;
201
        default:
202
            return AVERROR(EINVAL);
203
        }
204
205
    }
206
207
380308
    if (!(copy = av_frame_alloc()))
208
        return AVERROR(ENOMEM);
209
210

380308
    if (refcounted && !(flags & AV_BUFFERSRC_FLAG_KEEP_REF)) {
211
379879
        av_frame_move_ref(copy, frame);
212
    } else {
213
429
        ret = av_frame_ref(copy, frame);
214
429
        if (ret < 0) {
215
            av_frame_free(&copy);
216
            return ret;
217
        }
218
    }
219
220
380308
    ret = ff_filter_frame(ctx->outputs[0], copy);
221
380308
    if (ret < 0)
222
        return ret;
223
224
380308
    if ((flags & AV_BUFFERSRC_FLAG_PUSH)) {
225
380289
        ret = push_frame(ctx->graph);
226
380289
        if (ret < 0)
227
            return ret;
228
    }
229
230
380308
    return 0;
231
}
232
233
5776
int av_buffersrc_close(AVFilterContext *ctx, int64_t pts, unsigned flags)
234
{
235
5776
    BufferSourceContext *s = ctx->priv;
236
237
5776
    s->eof = 1;
238
5776
    ff_avfilter_link_set_in_status(ctx->outputs[0], AVERROR_EOF, pts);
239
5776
    return (flags & AV_BUFFERSRC_FLAG_PUSH) ? push_frame(ctx->graph) : 0;
240
}
241
242
4691
static av_cold int init_video(AVFilterContext *ctx)
243
{
244
4691
    BufferSourceContext *c = ctx->priv;
245
246


9382
    if (c->pix_fmt == AV_PIX_FMT_NONE || !c->w || !c->h ||
247
4691
        av_q2d(c->time_base) <= 0) {
248
        av_log(ctx, AV_LOG_ERROR, "Invalid parameters provided.\n");
249
        return AVERROR(EINVAL);
250
    }
251
252
4691
    av_log(ctx, AV_LOG_VERBOSE, "w:%d h:%d pixfmt:%s tb:%d/%d fr:%d/%d sar:%d/%d\n",
253
           c->w, c->h, av_get_pix_fmt_name(c->pix_fmt),
254
           c->time_base.num, c->time_base.den, c->frame_rate.num, c->frame_rate.den,
255
           c->pixel_aspect.num, c->pixel_aspect.den);
256
257
#if FF_API_SWS_PARAM_OPTION
258
4691
    if (c->sws_param)
259
        av_log(ctx, AV_LOG_WARNING, "sws_param option is deprecated and ignored\n");
260
#endif
261
262
4691
    return 0;
263
}
264
265
365597
unsigned av_buffersrc_get_nb_failed_requests(AVFilterContext *buffer_src)
266
{
267
365597
    return ((BufferSourceContext *)buffer_src->priv)->nb_failed_requests;
268
}
269
270
#define OFFSET(x) offsetof(BufferSourceContext, x)
271
#define A AV_OPT_FLAG_FILTERING_PARAM|AV_OPT_FLAG_AUDIO_PARAM
272
#define V AV_OPT_FLAG_FILTERING_PARAM|AV_OPT_FLAG_VIDEO_PARAM
273
274
static const AVOption buffer_options[] = {
275
    { "width",         NULL,                     OFFSET(w),                AV_OPT_TYPE_INT,      { .i64 = 0 }, 0, INT_MAX, V },
276
    { "video_size",    NULL,                     OFFSET(w),                AV_OPT_TYPE_IMAGE_SIZE,                .flags = V },
277
    { "height",        NULL,                     OFFSET(h),                AV_OPT_TYPE_INT,      { .i64 = 0 }, 0, INT_MAX, V },
278
    { "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 },
279
    { "sar",           "sample aspect ratio",    OFFSET(pixel_aspect),     AV_OPT_TYPE_RATIONAL, { .dbl = 0 }, 0, DBL_MAX, V },
280
    { "pixel_aspect",  "sample aspect ratio",    OFFSET(pixel_aspect),     AV_OPT_TYPE_RATIONAL, { .dbl = 0 }, 0, DBL_MAX, V },
281
    { "time_base",     NULL,                     OFFSET(time_base),        AV_OPT_TYPE_RATIONAL, { .dbl = 0 }, 0, DBL_MAX, V },
282
    { "frame_rate",    NULL,                     OFFSET(frame_rate),       AV_OPT_TYPE_RATIONAL, { .dbl = 0 }, 0, DBL_MAX, V },
283
#if FF_API_SWS_PARAM_OPTION
284
    { "sws_param",     NULL,                     OFFSET(sws_param),        AV_OPT_TYPE_STRING,                    .flags = V },
285
#endif
286
    { NULL },
287
};
288
289
AVFILTER_DEFINE_CLASS(buffer);
290
291
static const AVOption abuffer_options[] = {
292
    { "time_base",      NULL, OFFSET(time_base),           AV_OPT_TYPE_RATIONAL, { .dbl = 0 }, 0, INT_MAX, A },
293
    { "sample_rate",    NULL, OFFSET(sample_rate),         AV_OPT_TYPE_INT,      { .i64 = 0 }, 0, INT_MAX, A },
294
    { "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 },
295
    { "channel_layout", NULL, OFFSET(channel_layout_str),  AV_OPT_TYPE_STRING,             .flags = A },
296
    { "channels",       NULL, OFFSET(channels),            AV_OPT_TYPE_INT,      { .i64 = 0 }, 0, INT_MAX, A },
297
    { NULL },
298
};
299
300
AVFILTER_DEFINE_CLASS(abuffer);
301
302
1131
static av_cold int init_audio(AVFilterContext *ctx)
303
{
304
1131
    BufferSourceContext *s = ctx->priv;
305
1131
    int ret = 0;
306
307
1131
    if (s->sample_fmt == AV_SAMPLE_FMT_NONE) {
308
        av_log(ctx, AV_LOG_ERROR, "Sample format was not set or was invalid\n");
309
        return AVERROR(EINVAL);
310
    }
311
312

1131
    if (s->channel_layout_str || s->channel_layout) {
313
        int n;
314
315
1125
        if (!s->channel_layout) {
316
1125
            s->channel_layout = av_get_channel_layout(s->channel_layout_str);
317
1125
            if (!s->channel_layout) {
318
                av_log(ctx, AV_LOG_ERROR, "Invalid channel layout %s.\n",
319
                       s->channel_layout_str);
320
                return AVERROR(EINVAL);
321
            }
322
        }
323
1125
        n = av_get_channel_layout_nb_channels(s->channel_layout);
324
1125
        if (s->channels) {
325
            if (n != s->channels) {
326
                av_log(ctx, AV_LOG_ERROR,
327
                       "Mismatching channel count %d and layout '%s' "
328
                       "(%d channels)\n",
329
                       s->channels, s->channel_layout_str, n);
330
                return AVERROR(EINVAL);
331
            }
332
        }
333
1125
        s->channels = n;
334
6
    } else if (!s->channels) {
335
        av_log(ctx, AV_LOG_ERROR, "Neither number of channels nor "
336
                                  "channel layout specified\n");
337
        return AVERROR(EINVAL);
338
    }
339
340
1131
    if (!s->time_base.num)
341
        s->time_base = (AVRational){1, s->sample_rate};
342
343
1131
    av_log(ctx, AV_LOG_VERBOSE,
344
           "tb:%d/%d samplefmt:%s samplerate:%d chlayout:%s\n",
345
           s->time_base.num, s->time_base.den, av_get_sample_fmt_name(s->sample_fmt),
346
           s->sample_rate, s->channel_layout_str);
347
348
1131
    return ret;
349
}
350
351
5822
static av_cold void uninit(AVFilterContext *ctx)
352
{
353
5822
    BufferSourceContext *s = ctx->priv;
354
5822
    av_buffer_unref(&s->hw_frames_ctx);
355
5822
}
356
357
5822
static int query_formats(AVFilterContext *ctx)
358
{
359
5822
    BufferSourceContext *c = ctx->priv;
360
5822
    AVFilterChannelLayouts *channel_layouts = NULL;
361
5822
    AVFilterFormats *formats = NULL;
362
5822
    AVFilterFormats *samplerates = NULL;
363
    int ret;
364
365
5822
    switch (ctx->outputs[0]->type) {
366
4691
    case AVMEDIA_TYPE_VIDEO:
367

9382
        if ((ret = ff_add_format         (&formats, c->pix_fmt)) < 0 ||
368
4691
            (ret = ff_set_common_formats (ctx     , formats   )) < 0)
369
            return ret;
370
4691
        break;
371
1131
    case AVMEDIA_TYPE_AUDIO:
372

2262
        if ((ret = ff_add_format             (&formats    , c->sample_fmt )) < 0 ||
373
2262
            (ret = ff_set_common_formats     (ctx         , formats       )) < 0 ||
374
2262
            (ret = ff_add_format             (&samplerates, c->sample_rate)) < 0 ||
375
1131
            (ret = ff_set_common_samplerates (ctx         , samplerates   )) < 0)
376
            return ret;
377
378
1131
        if ((ret = ff_add_channel_layout(&channel_layouts,
379
1131
                              c->channel_layout ? c->channel_layout :
380
6
                              FF_COUNT2LAYOUT(c->channels))) < 0)
381
            return ret;
382
1131
        if ((ret = ff_set_common_channel_layouts(ctx, channel_layouts)) < 0)
383
            return ret;
384
1131
        break;
385
    default:
386
        return AVERROR(EINVAL);
387
    }
388
389
5822
    return 0;
390
}
391
392
5822
static int config_props(AVFilterLink *link)
393
{
394
5822
    BufferSourceContext *c = link->src->priv;
395
396
5822
    switch (link->type) {
397
4691
    case AVMEDIA_TYPE_VIDEO:
398
4691
        link->w = c->w;
399
4691
        link->h = c->h;
400
4691
        link->sample_aspect_ratio = c->pixel_aspect;
401
402
4691
        if (c->hw_frames_ctx) {
403
            link->hw_frames_ctx = av_buffer_ref(c->hw_frames_ctx);
404
            if (!link->hw_frames_ctx)
405
                return AVERROR(ENOMEM);
406
        }
407
4691
        break;
408
1131
    case AVMEDIA_TYPE_AUDIO:
409
1131
        if (!c->channel_layout)
410
6
            c->channel_layout = link->channel_layout;
411
1131
        break;
412
    default:
413
        return AVERROR(EINVAL);
414
    }
415
416
5822
    link->time_base = c->time_base;
417
5822
    link->frame_rate = c->frame_rate;
418
5822
    return 0;
419
}
420
421
348011
static int request_frame(AVFilterLink *link)
422
{
423
348011
    BufferSourceContext *c = link->src->priv;
424
425
348011
    if (c->eof)
426
        return AVERROR_EOF;
427
348011
    c->nb_failed_requests++;
428
348011
    return AVERROR(EAGAIN);
429
}
430
431
static const AVFilterPad avfilter_vsrc_buffer_outputs[] = {
432
    {
433
        .name          = "default",
434
        .type          = AVMEDIA_TYPE_VIDEO,
435
        .request_frame = request_frame,
436
        .config_props  = config_props,
437
    },
438
    { NULL }
439
};
440
441
AVFilter ff_vsrc_buffer = {
442
    .name      = "buffer",
443
    .description = NULL_IF_CONFIG_SMALL("Buffer video frames, and make them accessible to the filterchain."),
444
    .priv_size = sizeof(BufferSourceContext),
445
    .query_formats = query_formats,
446
447
    .init      = init_video,
448
    .uninit    = uninit,
449
450
    .inputs    = NULL,
451
    .outputs   = avfilter_vsrc_buffer_outputs,
452
    .priv_class = &buffer_class,
453
};
454
455
static const AVFilterPad avfilter_asrc_abuffer_outputs[] = {
456
    {
457
        .name          = "default",
458
        .type          = AVMEDIA_TYPE_AUDIO,
459
        .request_frame = request_frame,
460
        .config_props  = config_props,
461
    },
462
    { NULL }
463
};
464
465
AVFilter ff_asrc_abuffer = {
466
    .name          = "abuffer",
467
    .description   = NULL_IF_CONFIG_SMALL("Buffer audio frames, and make them accessible to the filterchain."),
468
    .priv_size     = sizeof(BufferSourceContext),
469
    .query_formats = query_formats,
470
471
    .init      = init_audio,
472
    .uninit    = uninit,
473
474
    .inputs    = NULL,
475
    .outputs   = avfilter_asrc_abuffer_outputs,
476
    .priv_class = &abuffer_class,
477
};