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
av_buffersrc_parameters_alloc(void)87 AVBufferSrcParameters *av_buffersrc_parameters_alloc(void)
88 {
89 AVBufferSrcParameters *par = av_mallocz(sizeof(*par));
90 if (!par)
91 return NULL;
92
93 par->format = -1;
94
95 return par;
96 }
97
av_buffersrc_parameters_set(AVFilterContext * ctx,AVBufferSrcParameters * param)98 int av_buffersrc_parameters_set(AVFilterContext *ctx, AVBufferSrcParameters *param)
99 {
100 BufferSourceContext *s = ctx->priv;
101
102 if (param->time_base.num > 0 && param->time_base.den > 0)
103 s->time_base = param->time_base;
104
105 switch (ctx->filter->outputs[0].type) {
106 case AVMEDIA_TYPE_VIDEO:
107 if (param->format != AV_PIX_FMT_NONE) {
108 s->pix_fmt = param->format;
109 }
110 if (param->width > 0)
111 s->w = param->width;
112 if (param->height > 0)
113 s->h = param->height;
114 if (param->sample_aspect_ratio.num > 0 && param->sample_aspect_ratio.den > 0)
115 s->pixel_aspect = param->sample_aspect_ratio;
116 if (param->frame_rate.num > 0 && param->frame_rate.den > 0)
117 s->frame_rate = param->frame_rate;
118 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 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 return 0;
139 }
140
av_buffersrc_write_frame(AVFilterContext * ctx,const AVFrame * frame)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
av_buffersrc_add_frame(AVFilterContext * ctx,AVFrame * frame)147 int attribute_align_arg av_buffersrc_add_frame(AVFilterContext *ctx, AVFrame *frame)
148 {
149 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
av_buffersrc_add_frame_flags(AVFilterContext * ctx,AVFrame * frame,int flags)155 int attribute_align_arg av_buffersrc_add_frame_flags(AVFilterContext *ctx, AVFrame *frame, int flags)
156 {
157 AVFrame *copy = NULL;
158 int ret = 0;
159
160 if (frame && frame->channel_layout &&
161 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 if (!(flags & AV_BUFFERSRC_FLAG_KEEP_REF) || !frame)
167 return av_buffersrc_add_frame_internal(ctx, frame, flags);
168
169 if (!(copy = av_frame_alloc()))
170 return AVERROR(ENOMEM);
171 ret = av_frame_ref(copy, frame);
172 if (ret >= 0)
173 ret = av_buffersrc_add_frame_internal(ctx, copy, flags);
174
175 av_frame_free(©);
176 return ret;
177 }
178
push_frame(AVFilterGraph * graph)179 static int push_frame(AVFilterGraph *graph)
180 {
181 int ret;
182
183 while (1) {
184 ret = ff_filter_graph_run_once(graph);
185 if (ret == AVERROR(EAGAIN))
186 break;
187 if (ret < 0)
188 return ret;
189 }
190 return 0;
191 }
192
av_buffersrc_add_frame_internal(AVFilterContext * ctx,AVFrame * frame,int flags)193 static int av_buffersrc_add_frame_internal(AVFilterContext *ctx,
194 AVFrame *frame, int flags)
195 {
196 BufferSourceContext *s = ctx->priv;
197 AVFrame *copy;
198 int refcounted, ret;
199
200 s->nb_failed_requests = 0;
201
202 if (!frame)
203 return av_buffersrc_close(ctx, AV_NOPTS_VALUE, flags);
204 if (s->eof)
205 return AVERROR(EINVAL);
206
207 refcounted = !!frame->buf[0];
208
209 if (!(flags & AV_BUFFERSRC_FLAG_NO_CHECK_FORMAT)) {
210
211 switch (ctx->outputs[0]->type) {
212 case AVMEDIA_TYPE_VIDEO:
213 CHECK_VIDEO_PARAM_CHANGE(ctx, s, frame->width, frame->height,
214 frame->format, frame->pts);
215 break;
216 case AVMEDIA_TYPE_AUDIO:
217 /* For layouts unknown on input but known on link after negotiation. */
218 if (!frame->channel_layout)
219 frame->channel_layout = s->channel_layout;
220 CHECK_AUDIO_PARAM_CHANGE(ctx, s, frame->sample_rate, frame->channel_layout,
221 frame->channels, frame->format, frame->pts);
222 break;
223 default:
224 return AVERROR(EINVAL);
225 }
226
227 }
228
229 if (!(copy = av_frame_alloc()))
230 return AVERROR(ENOMEM);
231
232 if (refcounted) {
233 av_frame_move_ref(copy, frame);
234 } else {
235 ret = av_frame_ref(copy, frame);
236 if (ret < 0) {
237 av_frame_free(©);
238 return ret;
239 }
240 }
241
242 ret = ff_filter_frame(ctx->outputs[0], copy);
243 if (ret < 0)
244 return ret;
245
246 if ((flags & AV_BUFFERSRC_FLAG_PUSH)) {
247 ret = push_frame(ctx->graph);
248 if (ret < 0)
249 return ret;
250 }
251
252 return 0;
253 }
254
av_buffersrc_close(AVFilterContext * ctx,int64_t pts,unsigned flags)255 int av_buffersrc_close(AVFilterContext *ctx, int64_t pts, unsigned flags)
256 {
257 BufferSourceContext *s = ctx->priv;
258
259 s->eof = 1;
260 ff_avfilter_link_set_in_status(ctx->outputs[0], AVERROR_EOF, pts);
261 return (flags & AV_BUFFERSRC_FLAG_PUSH) ? push_frame(ctx->graph) : 0;
262 }
263
init_video(AVFilterContext * ctx)264 static av_cold int init_video(AVFilterContext *ctx)
265 {
266 BufferSourceContext *c = ctx->priv;
267
268 if (c->pix_fmt == AV_PIX_FMT_NONE || !c->w || !c->h ||
269 av_q2d(c->time_base) <= 0) {
270 av_log(ctx, AV_LOG_ERROR, "Invalid parameters provided.\n");
271 return AVERROR(EINVAL);
272 }
273
274 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 if (c->sws_param)
281 av_log(ctx, AV_LOG_WARNING, "sws_param option is deprecated and ignored\n");
282 #endif
283
284 return 0;
285 }
286
av_buffersrc_get_nb_failed_requests(AVFilterContext * buffer_src)287 unsigned av_buffersrc_get_nb_failed_requests(AVFilterContext *buffer_src)
288 {
289 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
init_audio(AVFilterContext * ctx)324 static av_cold int init_audio(AVFilterContext *ctx)
325 {
326 BufferSourceContext *s = ctx->priv;
327 int ret = 0;
328
329 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 if (s->channel_layout_str || s->channel_layout) {
335 int n;
336
337 if (!s->channel_layout) {
338 s->channel_layout = av_get_channel_layout(s->channel_layout_str);
339 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 n = av_get_channel_layout_nb_channels(s->channel_layout);
346 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 s->channels = n;
356 } 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 if (!s->time_base.num)
363 s->time_base = (AVRational){1, s->sample_rate};
364
365 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 return ret;
371 }
372
uninit(AVFilterContext * ctx)373 static av_cold void uninit(AVFilterContext *ctx)
374 {
375 BufferSourceContext *s = ctx->priv;
376 av_buffer_unref(&s->hw_frames_ctx);
377 }
378
query_formats(AVFilterContext * ctx)379 static int query_formats(AVFilterContext *ctx)
380 {
381 BufferSourceContext *c = ctx->priv;
382 AVFilterChannelLayouts *channel_layouts = NULL;
383 AVFilterFormats *formats = NULL;
384 AVFilterFormats *samplerates = NULL;
385 int ret;
386
387 switch (ctx->outputs[0]->type) {
388 case AVMEDIA_TYPE_VIDEO:
389 if ((ret = ff_add_format (&formats, c->pix_fmt)) < 0 ||
390 (ret = ff_set_common_formats (ctx , formats )) < 0)
391 return ret;
392 break;
393 case AVMEDIA_TYPE_AUDIO:
394 if ((ret = ff_add_format (&formats , c->sample_fmt )) < 0 ||
395 (ret = ff_set_common_formats (ctx , formats )) < 0 ||
396 (ret = ff_add_format (&samplerates, c->sample_rate)) < 0 ||
397 (ret = ff_set_common_samplerates (ctx , samplerates )) < 0)
398 return ret;
399
400 if ((ret = ff_add_channel_layout(&channel_layouts,
401 c->channel_layout ? c->channel_layout :
402 FF_COUNT2LAYOUT(c->channels))) < 0)
403 return ret;
404 if ((ret = ff_set_common_channel_layouts(ctx, channel_layouts)) < 0)
405 return ret;
406 break;
407 default:
408 return AVERROR(EINVAL);
409 }
410
411 return 0;
412 }
413
config_props(AVFilterLink * link)414 static int config_props(AVFilterLink *link)
415 {
416 BufferSourceContext *c = link->src->priv;
417
418 switch (link->type) {
419 case AVMEDIA_TYPE_VIDEO:
420 link->w = c->w;
421 link->h = c->h;
422 link->sample_aspect_ratio = c->pixel_aspect;
423
424 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 break;
430 case AVMEDIA_TYPE_AUDIO:
431 if (!c->channel_layout)
432 c->channel_layout = link->channel_layout;
433 break;
434 default:
435 return AVERROR(EINVAL);
436 }
437
438 link->time_base = c->time_base;
439 link->frame_rate = c->frame_rate;
440 return 0;
441 }
442
request_frame(AVFilterLink * link)443 static int request_frame(AVFilterLink *link)
444 {
445 BufferSourceContext *c = link->src->priv;
446
447 if (c->eof)
448 return AVERROR_EOF;
449 c->nb_failed_requests++;
450 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 };
500