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/channel_layout.h"
29 #include "libavutil/common.h"
30 #include "libavutil/frame.h"
31 #include "libavutil/imgutils.h"
32 #include "libavutil/internal.h"
33 #include "libavutil/opt.h"
34 #include "libavutil/samplefmt.h"
35 #include "libavutil/timestamp.h"
36 #include "audio.h"
37 #include "avfilter.h"
38 #include "buffersrc.h"
39 #include "formats.h"
40 #include "internal.h"
41 #include "video.h"
42
43 typedef struct BufferSourceContext {
44 const AVClass *class;
45 AVRational time_base; ///< time_base to set in the output link
46 AVRational frame_rate; ///< frame_rate to set in the output link
47 unsigned nb_failed_requests;
48
49 /* video only */
50 int w, h;
51 enum AVPixelFormat pix_fmt;
52 AVRational pixel_aspect;
53 #if FF_API_SWS_PARAM_OPTION
54 char *sws_param;
55 #endif
56
57 AVBufferRef *hw_frames_ctx;
58
59 /* audio only */
60 int sample_rate;
61 enum AVSampleFormat sample_fmt;
62 int channels;
63 char *channel_layout_str;
64 AVChannelLayout ch_layout;
65
66 int eof;
67 } BufferSourceContext;
68
69 #define CHECK_VIDEO_PARAM_CHANGE(s, c, width, height, format, pts)\
70 if (c->w != width || c->h != height || c->pix_fmt != format) {\
71 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",\
72 c->w, c->h, c->pix_fmt, width, height, format, av_ts2timestr(pts, &s->outputs[0]->time_base));\
73 av_log(s, AV_LOG_WARNING, "Changing video frame properties on the fly is not supported by all filters.\n");\
74 }
75
76 #define CHECK_AUDIO_PARAM_CHANGE(s, c, srate, layout, format, pts)\
77 if (c->sample_fmt != format || c->sample_rate != srate ||\
78 av_channel_layout_compare(&c->ch_layout, &layout) || c->channels != layout.nb_channels) {\
79 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",\
80 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,\
81 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));\
82 av_log(s, AV_LOG_ERROR, "Changing audio frame properties on the fly is not supported.\n");\
83 return AVERROR(EINVAL);\
84 }
85
av_buffersrc_parameters_alloc(void)86 AVBufferSrcParameters *av_buffersrc_parameters_alloc(void)
87 {
88 AVBufferSrcParameters *par = av_mallocz(sizeof(*par));
89 if (!par)
90 return NULL;
91
92 par->format = -1;
93
94 return par;
95 }
96
av_buffersrc_parameters_set(AVFilterContext * ctx,AVBufferSrcParameters * param)97 int av_buffersrc_parameters_set(AVFilterContext *ctx, AVBufferSrcParameters *param)
98 {
99 BufferSourceContext *s = ctx->priv;
100
101 if (param->time_base.num > 0 && param->time_base.den > 0)
102 s->time_base = param->time_base;
103
104 switch (ctx->filter->outputs[0].type) {
105 case AVMEDIA_TYPE_VIDEO:
106 if (param->format != AV_PIX_FMT_NONE) {
107 s->pix_fmt = param->format;
108 }
109 if (param->width > 0)
110 s->w = param->width;
111 if (param->height > 0)
112 s->h = param->height;
113 if (param->sample_aspect_ratio.num > 0 && param->sample_aspect_ratio.den > 0)
114 s->pixel_aspect = param->sample_aspect_ratio;
115 if (param->frame_rate.num > 0 && param->frame_rate.den > 0)
116 s->frame_rate = param->frame_rate;
117 if (param->hw_frames_ctx) {
118 av_buffer_unref(&s->hw_frames_ctx);
119 s->hw_frames_ctx = av_buffer_ref(param->hw_frames_ctx);
120 if (!s->hw_frames_ctx)
121 return AVERROR(ENOMEM);
122 }
123 break;
124 case AVMEDIA_TYPE_AUDIO:
125 if (param->format != AV_SAMPLE_FMT_NONE) {
126 s->sample_fmt = param->format;
127 }
128 if (param->sample_rate > 0)
129 s->sample_rate = param->sample_rate;
130 #if FF_API_OLD_CHANNEL_LAYOUT
131 FF_DISABLE_DEPRECATION_WARNINGS
132 // if the old/new fields are set inconsistently, prefer the old ones
133 if (param->channel_layout && (param->ch_layout.order != AV_CHANNEL_ORDER_NATIVE ||
134 param->ch_layout.u.mask != param->channel_layout)) {
135 av_channel_layout_uninit(&s->ch_layout);
136 av_channel_layout_from_mask(&s->ch_layout, param->channel_layout);
137 FF_ENABLE_DEPRECATION_WARNINGS
138 } else
139 #endif
140 if (param->ch_layout.nb_channels) {
141 int ret = av_channel_layout_copy(&s->ch_layout, ¶m->ch_layout);
142 if (ret < 0)
143 return ret;
144 }
145 break;
146 default:
147 return AVERROR_BUG;
148 }
149
150 return 0;
151 }
152
av_buffersrc_write_frame(AVFilterContext * ctx,const AVFrame * frame)153 int attribute_align_arg av_buffersrc_write_frame(AVFilterContext *ctx, const AVFrame *frame)
154 {
155 return av_buffersrc_add_frame_flags(ctx, (AVFrame *)frame,
156 AV_BUFFERSRC_FLAG_KEEP_REF);
157 }
158
av_buffersrc_add_frame(AVFilterContext * ctx,AVFrame * frame)159 int attribute_align_arg av_buffersrc_add_frame(AVFilterContext *ctx, AVFrame *frame)
160 {
161 return av_buffersrc_add_frame_flags(ctx, frame, 0);
162 }
163
push_frame(AVFilterGraph * graph)164 static int push_frame(AVFilterGraph *graph)
165 {
166 int ret;
167
168 while (1) {
169 ret = ff_filter_graph_run_once(graph);
170 if (ret == AVERROR(EAGAIN))
171 break;
172 if (ret < 0)
173 return ret;
174 }
175 return 0;
176 }
177
av_buffersrc_add_frame_flags(AVFilterContext * ctx,AVFrame * frame,int flags)178 int attribute_align_arg av_buffersrc_add_frame_flags(AVFilterContext *ctx, AVFrame *frame, int flags)
179 {
180 BufferSourceContext *s = ctx->priv;
181 AVFrame *copy;
182 int refcounted, ret;
183
184 #if FF_API_OLD_CHANNEL_LAYOUT
185 FF_DISABLE_DEPRECATION_WARNINGS
186 if (frame && frame->channel_layout &&
187 av_get_channel_layout_nb_channels(frame->channel_layout) != frame->channels) {
188 av_log(ctx, AV_LOG_ERROR, "Layout indicates a different number of channels than actually present\n");
189 return AVERROR(EINVAL);
190 }
191 FF_ENABLE_DEPRECATION_WARNINGS
192 #endif
193
194 s->nb_failed_requests = 0;
195
196 if (!frame)
197 return av_buffersrc_close(ctx, AV_NOPTS_VALUE, flags);
198 if (s->eof)
199 return AVERROR(EINVAL);
200
201 refcounted = !!frame->buf[0];
202
203 if (!(flags & AV_BUFFERSRC_FLAG_NO_CHECK_FORMAT)) {
204
205 switch (ctx->outputs[0]->type) {
206 case AVMEDIA_TYPE_VIDEO:
207 CHECK_VIDEO_PARAM_CHANGE(ctx, s, frame->width, frame->height,
208 frame->format, frame->pts);
209 break;
210 case AVMEDIA_TYPE_AUDIO:
211 /* For layouts unknown on input but known on link after negotiation. */
212 #if FF_API_OLD_CHANNEL_LAYOUT
213 FF_DISABLE_DEPRECATION_WARNINGS
214 if (!frame->channel_layout)
215 frame->channel_layout = s->ch_layout.order == AV_CHANNEL_ORDER_NATIVE ?
216 s->ch_layout.u.mask : 0;
217 FF_ENABLE_DEPRECATION_WARNINGS
218 #endif
219 if (frame->ch_layout.order == AV_CHANNEL_ORDER_UNSPEC) {
220 ret = av_channel_layout_copy(&frame->ch_layout, &s->ch_layout);
221 if (ret < 0)
222 return ret;
223 }
224 CHECK_AUDIO_PARAM_CHANGE(ctx, s, frame->sample_rate, frame->ch_layout,
225 frame->format, frame->pts);
226 break;
227 default:
228 return AVERROR(EINVAL);
229 }
230
231 }
232
233 if (!(copy = av_frame_alloc()))
234 return AVERROR(ENOMEM);
235
236 if (refcounted && !(flags & AV_BUFFERSRC_FLAG_KEEP_REF)) {
237 av_frame_move_ref(copy, frame);
238 } else {
239 ret = av_frame_ref(copy, frame);
240 if (ret < 0) {
241 av_frame_free(©);
242 return ret;
243 }
244 }
245
246 ret = ff_filter_frame(ctx->outputs[0], copy);
247 if (ret < 0)
248 return ret;
249
250 if ((flags & AV_BUFFERSRC_FLAG_PUSH)) {
251 ret = push_frame(ctx->graph);
252 if (ret < 0)
253 return ret;
254 }
255
256 return 0;
257 }
258
av_buffersrc_close(AVFilterContext * ctx,int64_t pts,unsigned flags)259 int av_buffersrc_close(AVFilterContext *ctx, int64_t pts, unsigned flags)
260 {
261 BufferSourceContext *s = ctx->priv;
262
263 s->eof = 1;
264 ff_avfilter_link_set_in_status(ctx->outputs[0], AVERROR_EOF, pts);
265 return (flags & AV_BUFFERSRC_FLAG_PUSH) ? push_frame(ctx->graph) : 0;
266 }
267
init_video(AVFilterContext * ctx)268 static av_cold int init_video(AVFilterContext *ctx)
269 {
270 BufferSourceContext *c = ctx->priv;
271
272 if (c->pix_fmt == AV_PIX_FMT_NONE || !c->w || !c->h ||
273 av_q2d(c->time_base) <= 0) {
274 av_log(ctx, AV_LOG_ERROR, "Invalid parameters provided.\n");
275 return AVERROR(EINVAL);
276 }
277
278 av_log(ctx, AV_LOG_VERBOSE, "w:%d h:%d pixfmt:%s tb:%d/%d fr:%d/%d sar:%d/%d\n",
279 c->w, c->h, av_get_pix_fmt_name(c->pix_fmt),
280 c->time_base.num, c->time_base.den, c->frame_rate.num, c->frame_rate.den,
281 c->pixel_aspect.num, c->pixel_aspect.den);
282
283 #if FF_API_SWS_PARAM_OPTION
284 if (c->sws_param)
285 av_log(ctx, AV_LOG_WARNING, "sws_param option is deprecated and ignored\n");
286 #endif
287
288 return 0;
289 }
290
av_buffersrc_get_nb_failed_requests(AVFilterContext * buffer_src)291 unsigned av_buffersrc_get_nb_failed_requests(AVFilterContext *buffer_src)
292 {
293 return ((BufferSourceContext *)buffer_src->priv)->nb_failed_requests;
294 }
295
296 #define OFFSET(x) offsetof(BufferSourceContext, x)
297 #define A AV_OPT_FLAG_FILTERING_PARAM|AV_OPT_FLAG_AUDIO_PARAM
298 #define V AV_OPT_FLAG_FILTERING_PARAM|AV_OPT_FLAG_VIDEO_PARAM
299
300 static const AVOption buffer_options[] = {
301 { "width", NULL, OFFSET(w), AV_OPT_TYPE_INT, { .i64 = 0 }, 0, INT_MAX, V },
302 { "video_size", NULL, OFFSET(w), AV_OPT_TYPE_IMAGE_SIZE, .flags = V },
303 { "height", NULL, OFFSET(h), AV_OPT_TYPE_INT, { .i64 = 0 }, 0, INT_MAX, V },
304 { "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 },
305 { "sar", "sample aspect ratio", OFFSET(pixel_aspect), AV_OPT_TYPE_RATIONAL, { .dbl = 0 }, 0, DBL_MAX, V },
306 { "pixel_aspect", "sample aspect ratio", OFFSET(pixel_aspect), AV_OPT_TYPE_RATIONAL, { .dbl = 0 }, 0, DBL_MAX, V },
307 { "time_base", NULL, OFFSET(time_base), AV_OPT_TYPE_RATIONAL, { .dbl = 0 }, 0, DBL_MAX, V },
308 { "frame_rate", NULL, OFFSET(frame_rate), AV_OPT_TYPE_RATIONAL, { .dbl = 0 }, 0, DBL_MAX, V },
309 #if FF_API_SWS_PARAM_OPTION
310 { "sws_param", NULL, OFFSET(sws_param), AV_OPT_TYPE_STRING, .flags = V },
311 #endif
312 { NULL },
313 };
314
315 AVFILTER_DEFINE_CLASS(buffer);
316
317 static const AVOption abuffer_options[] = {
318 { "time_base", NULL, OFFSET(time_base), AV_OPT_TYPE_RATIONAL, { .dbl = 0 }, 0, INT_MAX, A },
319 { "sample_rate", NULL, OFFSET(sample_rate), AV_OPT_TYPE_INT, { .i64 = 0 }, 0, INT_MAX, A },
320 { "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 },
321 { "channel_layout", NULL, OFFSET(channel_layout_str), AV_OPT_TYPE_STRING, .flags = A },
322 { "channels", NULL, OFFSET(channels), AV_OPT_TYPE_INT, { .i64 = 0 }, 0, INT_MAX, A },
323 { NULL },
324 };
325
326 AVFILTER_DEFINE_CLASS(abuffer);
327
init_audio(AVFilterContext * ctx)328 static av_cold int init_audio(AVFilterContext *ctx)
329 {
330 BufferSourceContext *s = ctx->priv;
331 char buf[128];
332 int ret = 0;
333
334 if (s->sample_fmt == AV_SAMPLE_FMT_NONE) {
335 av_log(ctx, AV_LOG_ERROR, "Sample format was not set or was invalid\n");
336 return AVERROR(EINVAL);
337 }
338
339 if (s->channel_layout_str || s->ch_layout.nb_channels) {
340 int n;
341
342 if (!s->ch_layout.nb_channels) {
343 ret = av_channel_layout_from_string(&s->ch_layout, s->channel_layout_str);
344 if (ret < 0) {
345 #if FF_API_OLD_CHANNEL_LAYOUT
346 uint64_t mask;
347 FF_DISABLE_DEPRECATION_WARNINGS
348 mask = av_get_channel_layout(s->channel_layout_str);
349 if (!mask) {
350 #endif
351 av_log(ctx, AV_LOG_ERROR, "Invalid channel layout %s.\n",
352 s->channel_layout_str);
353 return AVERROR(EINVAL);
354 #if FF_API_OLD_CHANNEL_LAYOUT
355 }
356 FF_ENABLE_DEPRECATION_WARNINGS
357 av_log(ctx, AV_LOG_WARNING, "Channel layout '%s' uses a deprecated syntax.\n",
358 s->channel_layout_str);
359 av_channel_layout_from_mask(&s->ch_layout, mask);
360 #endif
361 }
362 }
363
364 n = s->ch_layout.nb_channels;
365 av_channel_layout_describe(&s->ch_layout, buf, sizeof(buf));
366 if (s->channels) {
367 if (n != s->channels) {
368 av_log(ctx, AV_LOG_ERROR,
369 "Mismatching channel count %d and layout '%s' "
370 "(%d channels)\n",
371 s->channels, buf, n);
372 return AVERROR(EINVAL);
373 }
374 }
375 s->channels = n;
376 } else if (!s->channels) {
377 av_log(ctx, AV_LOG_ERROR, "Neither number of channels nor "
378 "channel layout specified\n");
379 return AVERROR(EINVAL);
380 } else {
381 s->ch_layout = FF_COUNT2LAYOUT(s->channels);
382 av_channel_layout_describe(&s->ch_layout, buf, sizeof(buf));
383 }
384
385 if (!s->time_base.num)
386 s->time_base = (AVRational){1, s->sample_rate};
387
388 av_log(ctx, AV_LOG_VERBOSE,
389 "tb:%d/%d samplefmt:%s samplerate:%d chlayout:%s\n",
390 s->time_base.num, s->time_base.den, av_get_sample_fmt_name(s->sample_fmt),
391 s->sample_rate, buf);
392
393 return ret;
394 }
395
uninit(AVFilterContext * ctx)396 static av_cold void uninit(AVFilterContext *ctx)
397 {
398 BufferSourceContext *s = ctx->priv;
399 av_buffer_unref(&s->hw_frames_ctx);
400 av_channel_layout_uninit(&s->ch_layout);
401 }
402
query_formats(AVFilterContext * ctx)403 static int query_formats(AVFilterContext *ctx)
404 {
405 BufferSourceContext *c = ctx->priv;
406 AVFilterChannelLayouts *channel_layouts = NULL;
407 AVFilterFormats *formats = NULL;
408 AVFilterFormats *samplerates = NULL;
409 int ret;
410
411 switch (ctx->outputs[0]->type) {
412 case AVMEDIA_TYPE_VIDEO:
413 if ((ret = ff_add_format (&formats, c->pix_fmt)) < 0 ||
414 (ret = ff_set_common_formats (ctx , formats )) < 0)
415 return ret;
416 break;
417 case AVMEDIA_TYPE_AUDIO:
418 if ((ret = ff_add_format (&formats , c->sample_fmt )) < 0 ||
419 (ret = ff_set_common_formats (ctx , formats )) < 0 ||
420 (ret = ff_add_format (&samplerates, c->sample_rate)) < 0 ||
421 (ret = ff_set_common_samplerates (ctx , samplerates )) < 0)
422 return ret;
423
424 if ((ret = ff_add_channel_layout(&channel_layouts, &c->ch_layout)) < 0)
425 return ret;
426 if ((ret = ff_set_common_channel_layouts(ctx, channel_layouts)) < 0)
427 return ret;
428 break;
429 default:
430 return AVERROR(EINVAL);
431 }
432
433 return 0;
434 }
435
config_props(AVFilterLink * link)436 static int config_props(AVFilterLink *link)
437 {
438 BufferSourceContext *c = link->src->priv;
439
440 switch (link->type) {
441 case AVMEDIA_TYPE_VIDEO:
442 link->w = c->w;
443 link->h = c->h;
444 link->sample_aspect_ratio = c->pixel_aspect;
445
446 if (c->hw_frames_ctx) {
447 link->hw_frames_ctx = av_buffer_ref(c->hw_frames_ctx);
448 if (!link->hw_frames_ctx)
449 return AVERROR(ENOMEM);
450 }
451 break;
452 case AVMEDIA_TYPE_AUDIO:
453 if (!c->ch_layout.nb_channels) {
454 int ret = av_channel_layout_copy(&c->ch_layout, &link->ch_layout);
455 if (ret < 0)
456 return ret;
457 }
458 break;
459 default:
460 return AVERROR(EINVAL);
461 }
462
463 link->time_base = c->time_base;
464 link->frame_rate = c->frame_rate;
465 return 0;
466 }
467
request_frame(AVFilterLink * link)468 static int request_frame(AVFilterLink *link)
469 {
470 BufferSourceContext *c = link->src->priv;
471
472 if (c->eof)
473 return AVERROR_EOF;
474 c->nb_failed_requests++;
475 return AVERROR(EAGAIN);
476 }
477
478 static const AVFilterPad avfilter_vsrc_buffer_outputs[] = {
479 {
480 .name = "default",
481 .type = AVMEDIA_TYPE_VIDEO,
482 .request_frame = request_frame,
483 .config_props = config_props,
484 },
485 };
486
487 const AVFilter ff_vsrc_buffer = {
488 .name = "buffer",
489 .description = NULL_IF_CONFIG_SMALL("Buffer video frames, and make them accessible to the filterchain."),
490 .priv_size = sizeof(BufferSourceContext),
491
492 .init = init_video,
493 .uninit = uninit,
494
495 .inputs = NULL,
496 FILTER_OUTPUTS(avfilter_vsrc_buffer_outputs),
497 FILTER_QUERY_FUNC(query_formats),
498 .priv_class = &buffer_class,
499 };
500
501 static const AVFilterPad avfilter_asrc_abuffer_outputs[] = {
502 {
503 .name = "default",
504 .type = AVMEDIA_TYPE_AUDIO,
505 .request_frame = request_frame,
506 .config_props = config_props,
507 },
508 };
509
510 const AVFilter ff_asrc_abuffer = {
511 .name = "abuffer",
512 .description = NULL_IF_CONFIG_SMALL("Buffer audio frames, and make them accessible to the filterchain."),
513 .priv_size = sizeof(BufferSourceContext),
514
515 .init = init_audio,
516 .uninit = uninit,
517
518 .inputs = NULL,
519 FILTER_OUTPUTS(avfilter_asrc_abuffer_outputs),
520 FILTER_QUERY_FUNC(query_formats),
521 .priv_class = &abuffer_class,
522 };
523