aboutsummaryrefslogtreecommitdiffstats
path: root/libavfilter/buffersrc.c
blob: ea5071370111d45d27cb2e8ddfdcfe8679a0d48b (plain) (blame)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
/*
 * Copyright (c) 2008 Vitor Sessak
 *
 * This file is part of FFmpeg.
 *
 * FFmpeg is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation; either
 * version 2.1 of the License, or (at your option) any later version.
 *
 * FFmpeg is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with FFmpeg; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
 */

/**
 * @file
 * memory buffer source filter
 */

#include <float.h>

#include "libavutil/channel_layout.h"
#include "libavutil/common.h"
#include "libavutil/frame.h"
#include "libavutil/imgutils.h"
#include "libavutil/internal.h"
#include "libavutil/opt.h"
#include "libavutil/samplefmt.h"
#include "libavutil/timestamp.h"
#include "audio.h"
#include "avfilter.h"
#include "buffersrc.h"
#include "formats.h"
#include "internal.h"
#include "video.h"

typedef struct BufferSourceContext {
    const AVClass    *class;
    AVRational        time_base;     ///< time_base to set in the output link
    AVRational        frame_rate;    ///< frame_rate to set in the output link
    unsigned          nb_failed_requests;

    /* video only */
    int               w, h;
    enum AVPixelFormat  pix_fmt;
    AVRational        pixel_aspect;

    AVBufferRef *hw_frames_ctx;

    /* audio only */
    int sample_rate;
    enum AVSampleFormat sample_fmt;
    int channels;
    char    *channel_layout_str;
    AVChannelLayout ch_layout;

    int eof;
    int64_t last_pts;
} BufferSourceContext;

#define CHECK_VIDEO_PARAM_CHANGE(s, c, width, height, format, pts)\
    if (c->w != width || c->h != height || c->pix_fmt != format) {\
        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",\
               c->w, c->h, c->pix_fmt, width, height, format, av_ts2timestr(pts, &s->outputs[0]->time_base));\
        av_log(s, AV_LOG_WARNING, "Changing video frame properties on the fly is not supported by all filters.\n");\
    }

#define CHECK_AUDIO_PARAM_CHANGE(s, c, srate, layout, format, pts)\
    if (c->sample_fmt != format || c->sample_rate != srate ||\
        av_channel_layout_compare(&c->ch_layout, &layout) || c->channels != layout.nb_channels) {\
        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",\
               av_get_sample_fmt_name(c->sample_fmt), c->sample_rate, c->ch_layout.order == AV_CHANNEL_ORDER_NATIVE ? c->ch_layout.u.mask : 0, c->channels,\
               av_get_sample_fmt_name(format), srate, layout.order == AV_CHANNEL_ORDER_NATIVE ? layout.u.mask : 0, layout.nb_channels, av_ts2timestr(pts, &s->outputs[0]->time_base));\
        av_log(s, AV_LOG_ERROR, "Changing audio frame properties on the fly is not supported.\n");\
        return AVERROR(EINVAL);\
    }

AVBufferSrcParameters *av_buffersrc_parameters_alloc(void)
{
    AVBufferSrcParameters *par = av_mallocz(sizeof(*par));
    if (!par)
        return NULL;

    par->format = -1;

    return par;
}

int av_buffersrc_parameters_set(AVFilterContext *ctx, AVBufferSrcParameters *param)
{
    BufferSourceContext *s = ctx->priv;

    if (param->time_base.num > 0 && param->time_base.den > 0)
        s->time_base = param->time_base;

    switch (ctx->filter->outputs[0].type) {
    case AVMEDIA_TYPE_VIDEO:
        if (param->format != AV_PIX_FMT_NONE) {
            s->pix_fmt = param->format;
        }
        if (param->width > 0)
            s->w = param->width;
        if (param->height > 0)
            s->h = param->height;
        if (param->sample_aspect_ratio.num > 0 && param->sample_aspect_ratio.den > 0)
            s->pixel_aspect = param->sample_aspect_ratio;
        if (param->frame_rate.num > 0 && param->frame_rate.den > 0)
            s->frame_rate = param->frame_rate;
        if (param->hw_frames_ctx) {
            av_buffer_unref(&s->hw_frames_ctx);
            s->hw_frames_ctx = av_buffer_ref(param->hw_frames_ctx);
            if (!s->hw_frames_ctx)
                return AVERROR(ENOMEM);
        }
        break;
    case AVMEDIA_TYPE_AUDIO:
        if (param->format != AV_SAMPLE_FMT_NONE) {
            s->sample_fmt = param->format;
        }
        if (param->sample_rate > 0)
            s->sample_rate = param->sample_rate;
#if FF_API_OLD_CHANNEL_LAYOUT
FF_DISABLE_DEPRECATION_WARNINGS
        // if the old/new fields are set inconsistently, prefer the old ones
        if (param->channel_layout && (param->ch_layout.order != AV_CHANNEL_ORDER_NATIVE ||
                                      param->ch_layout.u.mask != param->channel_layout)) {
            av_channel_layout_uninit(&s->ch_layout);
            av_channel_layout_from_mask(&s->ch_layout, param->channel_layout);
FF_ENABLE_DEPRECATION_WARNINGS
        } else
#endif
        if (param->ch_layout.nb_channels) {
            int ret = av_channel_layout_copy(&s->ch_layout, &param->ch_layout);
            if (ret < 0)
                return ret;
        }
        break;
    default:
        return AVERROR_BUG;
    }

    return 0;
}

int attribute_align_arg av_buffersrc_write_frame(AVFilterContext *ctx, const AVFrame *frame)
{
    return av_buffersrc_add_frame_flags(ctx, (AVFrame *)frame,
                                        AV_BUFFERSRC_FLAG_KEEP_REF);
}

int attribute_align_arg av_buffersrc_add_frame(AVFilterContext *ctx, AVFrame *frame)
{
    return av_buffersrc_add_frame_flags(ctx, frame, 0);
}

static int push_frame(AVFilterGraph *graph)
{
    int ret;

    while (1) {
        ret = ff_filter_graph_run_once(graph);
        if (ret == AVERROR(EAGAIN))
            break;
        if (ret < 0)
            return ret;
    }
    return 0;
}

int attribute_align_arg av_buffersrc_add_frame_flags(AVFilterContext *ctx, AVFrame *frame, int flags)
{
    BufferSourceContext *s = ctx->priv;
    AVFrame *copy;
    int refcounted, ret;

#if FF_API_OLD_CHANNEL_LAYOUT
FF_DISABLE_DEPRECATION_WARNINGS
    if (frame && frame->channel_layout &&
        av_get_channel_layout_nb_channels(frame->channel_layout) != frame->channels) {
        av_log(ctx, AV_LOG_ERROR, "Layout indicates a different number of channels than actually present\n");
        return AVERROR(EINVAL);
    }
FF_ENABLE_DEPRECATION_WARNINGS
#endif

    s->nb_failed_requests = 0;

    if (!frame)
        return av_buffersrc_close(ctx, s->last_pts, flags);
    if (s->eof)
        return AVERROR(EINVAL);

    s->last_pts = frame->pts + frame->duration;

    refcounted = !!frame->buf[0];

    if (!(flags & AV_BUFFERSRC_FLAG_NO_CHECK_FORMAT)) {

        switch (ctx->outputs[0]->type) {
        case AVMEDIA_TYPE_VIDEO:
            CHECK_VIDEO_PARAM_CHANGE(ctx, s, frame->width, frame->height,
                                     frame->format, frame->pts);
            break;
        case AVMEDIA_TYPE_AUDIO:
            /* For layouts unknown on input but known on link after negotiation. */
#if FF_API_OLD_CHANNEL_LAYOUT
FF_DISABLE_DEPRECATION_WARNINGS
            if (!frame->channel_layout)
                frame->channel_layout = s->ch_layout.order == AV_CHANNEL_ORDER_NATIVE ?
                                        s->ch_layout.u.mask : 0;
FF_ENABLE_DEPRECATION_WARNINGS
#endif
            if (frame->ch_layout.order == AV_CHANNEL_ORDER_UNSPEC) {
                ret = av_channel_layout_copy(&frame->ch_layout, &s->ch_layout);
                if (ret < 0)
                    return ret;
            }
            CHECK_AUDIO_PARAM_CHANGE(ctx, s, frame->sample_rate, frame->ch_layout,
                                     frame->format, frame->pts);
            break;
        default:
            return AVERROR(EINVAL);
        }

    }

    if (!(copy = av_frame_alloc()))
        return AVERROR(ENOMEM);

    if (refcounted && !(flags & AV_BUFFERSRC_FLAG_KEEP_REF)) {
        av_frame_move_ref(copy, frame);
    } else {
        ret = av_frame_ref(copy, frame);
        if (ret < 0) {
            av_frame_free(&copy);
            return ret;
        }
    }

#if FF_API_PKT_DURATION
FF_DISABLE_DEPRECATION_WARNINGS
    if (copy->pkt_duration && copy->pkt_duration != copy->duration)
        copy->duration = copy->pkt_duration;
FF_ENABLE_DEPRECATION_WARNINGS
#endif

#if FF_API_INTERLACED_FRAME
FF_DISABLE_DEPRECATION_WARNINGS
    if (copy->interlaced_frame)
        copy->flags |= AV_FRAME_FLAG_INTERLACED;
    if (copy->top_field_first)
        copy->flags |= AV_FRAME_FLAG_TOP_FIELD_FIRST;
FF_ENABLE_DEPRECATION_WARNINGS
#endif

#if FF_API_FRAME_KEY
FF_DISABLE_DEPRECATION_WARNINGS
    if (copy->key_frame)
        copy->flags |= AV_FRAME_FLAG_KEY;
FF_ENABLE_DEPRECATION_WARNINGS
#endif

    ret = ff_filter_frame(ctx->outputs[0], copy);
    if (ret < 0)
        return ret;

    if ((flags & AV_BUFFERSRC_FLAG_PUSH)) {
        ret = push_frame(ctx->graph);
        if (ret < 0)
            return ret;
    }

    return 0;
}

int av_buffersrc_close(AVFilterContext *ctx, int64_t pts, unsigned flags)
{
    BufferSourceContext *s = ctx->priv;

    s->eof = 1;
    ff_avfilter_link_set_in_status(ctx->outputs[0], AVERROR_EOF, pts);
    return (flags & AV_BUFFERSRC_FLAG_PUSH) ? push_frame(ctx->graph) : 0;
}

static av_cold int init_video(AVFilterContext *ctx)
{
    BufferSourceContext *c = ctx->priv;

    if (c->pix_fmt == AV_PIX_FMT_NONE) {
        av_log(ctx, AV_LOG_ERROR, "Unspecified pixel format\n");
        return AVERROR(EINVAL);
    }
    if (c->w <= 0 || c->h <= 0) {
        av_log(ctx, AV_LOG_ERROR, "Invalid size %dx%d\n", c->w, c->h);
        return AVERROR(EINVAL);
    }
    if (av_q2d(c->time_base) <= 0) {
        av_log(ctx, AV_LOG_ERROR, "Invalid time base %d/%d\n", c->time_base.num, c->time_base.den);
        return AVERROR(EINVAL);
    }

    av_log(ctx, AV_LOG_VERBOSE, "w:%d h:%d pixfmt:%s tb:%d/%d fr:%d/%d sar:%d/%d\n",
           c->w, c->h, av_get_pix_fmt_name(c->pix_fmt),
           c->time_base.num, c->time_base.den, c->frame_rate.num, c->frame_rate.den,
           c->pixel_aspect.num, c->pixel_aspect.den);

    return 0;
}

unsigned av_buffersrc_get_nb_failed_requests(AVFilterContext *buffer_src)
{
    return ((BufferSourceContext *)buffer_src->priv)->nb_failed_requests;
}

#define OFFSET(x) offsetof(BufferSourceContext, x)
#define A AV_OPT_FLAG_FILTERING_PARAM|AV_OPT_FLAG_AUDIO_PARAM
#define V AV_OPT_FLAG_FILTERING_PARAM|AV_OPT_FLAG_VIDEO_PARAM

static const AVOption buffer_options[] = {
    { "width",         NULL,                     OFFSET(w),                AV_OPT_TYPE_INT,      { .i64 = 0 }, 0, INT_MAX, V },
    { "video_size",    NULL,                     OFFSET(w),                AV_OPT_TYPE_IMAGE_SIZE,                .flags = V },
    { "height",        NULL,                     OFFSET(h),                AV_OPT_TYPE_INT,      { .i64 = 0 }, 0, INT_MAX, V },
    { "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 },
    { "sar",           "sample aspect ratio",    OFFSET(pixel_aspect),     AV_OPT_TYPE_RATIONAL, { .dbl = 0 }, 0, DBL_MAX, V },
    { "pixel_aspect",  "sample aspect ratio",    OFFSET(pixel_aspect),     AV_OPT_TYPE_RATIONAL, { .dbl = 0 }, 0, DBL_MAX, V },
    { "time_base",     NULL,                     OFFSET(time_base),        AV_OPT_TYPE_RATIONAL, { .dbl = 0 }, 0, DBL_MAX, V },
    { "frame_rate",    NULL,                     OFFSET(frame_rate),       AV_OPT_TYPE_RATIONAL, { .dbl = 0 }, 0, DBL_MAX, V },
    { NULL },
};

AVFILTER_DEFINE_CLASS(buffer);

static const AVOption abuffer_options[] = {
    { "time_base",      NULL, OFFSET(time_base),           AV_OPT_TYPE_RATIONAL, { .dbl = 0 }, 0, INT_MAX, A },
    { "sample_rate",    NULL, OFFSET(sample_rate),         AV_OPT_TYPE_INT,      { .i64 = 0 }, 0, INT_MAX, A },
    { "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 },
    { "channel_layout", NULL, OFFSET(channel_layout_str),  AV_OPT_TYPE_STRING,             .flags = A },
    { "channels",       NULL, OFFSET(channels),            AV_OPT_TYPE_INT,      { .i64 = 0 }, 0, INT_MAX, A },
    { NULL },
};

AVFILTER_DEFINE_CLASS(abuffer);

static av_cold int init_audio(AVFilterContext *ctx)
{
    BufferSourceContext *s = ctx->priv;
    char buf[128];
    int ret = 0;

    if (s->sample_fmt == AV_SAMPLE_FMT_NONE) {
        av_log(ctx, AV_LOG_ERROR, "Sample format was not set or was invalid\n");
        return AVERROR(EINVAL);
    }

    if (s->channel_layout_str || s->ch_layout.nb_channels) {
        int n;

        if (!s->ch_layout.nb_channels) {
            ret = av_channel_layout_from_string(&s->ch_layout, s->channel_layout_str);
            if (ret < 0) {
#if FF_API_OLD_CHANNEL_LAYOUT
                uint64_t mask;
FF_DISABLE_DEPRECATION_WARNINGS
                mask = av_get_channel_layout(s->channel_layout_str);
                if (!mask) {
#endif
                    av_log(ctx, AV_LOG_ERROR, "Invalid channel layout %s.\n",
                           s->channel_layout_str);
                    return AVERROR(EINVAL);
#if FF_API_OLD_CHANNEL_LAYOUT
                }
FF_ENABLE_DEPRECATION_WARNINGS
                av_log(ctx, AV_LOG_WARNING, "Channel layout '%s' uses a deprecated syntax.\n",
                       s->channel_layout_str);
                av_channel_layout_from_mask(&s->ch_layout, mask);
#endif
            }
        }

        n = s->ch_layout.nb_channels;
        av_channel_layout_describe(&s->ch_layout, buf, sizeof(buf));
        if (s->channels) {
            if (n != s->channels) {
                av_log(ctx, AV_LOG_ERROR,
                       "Mismatching channel count %d and layout '%s' "
                       "(%d channels)\n",
                       s->channels, buf, n);
                return AVERROR(EINVAL);
            }
        }
        s->channels = n;
    } else if (!s->channels) {
        av_log(ctx, AV_LOG_ERROR, "Neither number of channels nor "
                                  "channel layout specified\n");
        return AVERROR(EINVAL);
    } else {
        s->ch_layout = FF_COUNT2LAYOUT(s->channels);
        av_channel_layout_describe(&s->ch_layout, buf, sizeof(buf));
    }

    if (!s->time_base.num)
        s->time_base = (AVRational){1, s->sample_rate};

    av_log(ctx, AV_LOG_VERBOSE,
           "tb:%d/%d samplefmt:%s samplerate:%d chlayout:%s\n",
           s->time_base.num, s->time_base.den, av_get_sample_fmt_name(s->sample_fmt),
           s->sample_rate, buf);

    return ret;
}

static av_cold void uninit(AVFilterContext *ctx)
{
    BufferSourceContext *s = ctx->priv;
    av_buffer_unref(&s->hw_frames_ctx);
    av_channel_layout_uninit(&s->ch_layout);
}

static int query_formats(AVFilterContext *ctx)
{
    BufferSourceContext *c = ctx->priv;
    AVFilterChannelLayouts *channel_layouts = NULL;
    AVFilterFormats *formats = NULL;
    AVFilterFormats *samplerates = NULL;
    int ret;

    switch (ctx->outputs[0]->type) {
    case AVMEDIA_TYPE_VIDEO:
        if ((ret = ff_add_format         (&formats, c->pix_fmt)) < 0 ||
            (ret = ff_set_common_formats (ctx     , formats   )) < 0)
            return ret;
        break;
    case AVMEDIA_TYPE_AUDIO:
        if ((ret = ff_add_format             (&formats    , c->sample_fmt )) < 0 ||
            (ret = ff_set_common_formats     (ctx         , formats       )) < 0 ||
            (ret = ff_add_format             (&samplerates, c->sample_rate)) < 0 ||
            (ret = ff_set_common_samplerates (ctx         , samplerates   )) < 0)
            return ret;

        if ((ret = ff_add_channel_layout(&channel_layouts, &c->ch_layout)) < 0)
            return ret;
        if ((ret = ff_set_common_channel_layouts(ctx, channel_layouts)) < 0)
            return ret;
        break;
    default:
        return AVERROR(EINVAL);
    }

    return 0;
}

static int config_props(AVFilterLink *link)
{
    BufferSourceContext *c = link->src->priv;

    switch (link->type) {
    case AVMEDIA_TYPE_VIDEO:
        link->w = c->w;
        link->h = c->h;
        link->sample_aspect_ratio = c->pixel_aspect;

        if (c->hw_frames_ctx) {
            link->hw_frames_ctx = av_buffer_ref(c->hw_frames_ctx);
            if (!link->hw_frames_ctx)
                return AVERROR(ENOMEM);
        }
        break;
    case AVMEDIA_TYPE_AUDIO:
        if (!c->ch_layout.nb_channels) {
            int ret = av_channel_layout_copy(&c->ch_layout, &link->ch_layout);
            if (ret < 0)
                return ret;
        }
        break;
    default:
        return AVERROR(EINVAL);
    }

    link->time_base = c->time_base;
    link->frame_rate = c->frame_rate;
    return 0;
}

static int request_frame(AVFilterLink *link)
{
    BufferSourceContext *c = link->src->priv;

    if (c->eof)
        return AVERROR_EOF;
    c->nb_failed_requests++;
    return AVERROR(EAGAIN);
}

static const AVFilterPad avfilter_vsrc_buffer_outputs[] = {
    {
        .name          = "default",
        .type          = AVMEDIA_TYPE_VIDEO,
        .request_frame = request_frame,
        .config_props  = config_props,
    },
};

const AVFilter ff_vsrc_buffer = {
    .name      = "buffer",
    .description = NULL_IF_CONFIG_SMALL("Buffer video frames, and make them accessible to the filterchain."),
    .priv_size = sizeof(BufferSourceContext),

    .init      = init_video,
    .uninit    = uninit,

    .inputs    = NULL,
    FILTER_OUTPUTS(avfilter_vsrc_buffer_outputs),
    FILTER_QUERY_FUNC(query_formats),
    .priv_class = &buffer_class,
};

static const AVFilterPad avfilter_asrc_abuffer_outputs[] = {
    {
        .name          = "default",
        .type          = AVMEDIA_TYPE_AUDIO,
        .request_frame = request_frame,
        .config_props  = config_props,
    },
};

const AVFilter ff_asrc_abuffer = {
    .name          = "abuffer",
    .description   = NULL_IF_CONFIG_SMALL("Buffer audio frames, and make them accessible to the filterchain."),
    .priv_size     = sizeof(BufferSourceContext),

    .init      = init_audio,
    .uninit    = uninit,

    .inputs    = NULL,
    FILTER_OUTPUTS(avfilter_asrc_abuffer_outputs),
    FILTER_QUERY_FUNC(query_formats),
    .priv_class = &abuffer_class,
};