2 * Copyright (c) 2008 Vitor Sessak
4 * This file is part of Libav.
6 * Libav 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.
11 * Libav 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.
16 * You should have received a copy of the GNU Lesser General Public
17 * License along with Libav; if not, write to the Free Software
18 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
23 * memory buffer source filter
28 #include "libavutil/channel_layout.h"
29 #include "libavutil/common.h"
30 #include "libavutil/fifo.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"
38 #include "buffersrc.h"
43 typedef struct BufferSourceContext {
46 AVRational time_base; ///< time_base to set in the output link
47 AVRational frame_rate; ///< frame_rate to set in the output link
51 enum AVPixelFormat pix_fmt;
53 AVRational pixel_aspect;
55 AVBufferRef *hw_frames_ctx;
59 enum AVSampleFormat sample_fmt;
61 uint64_t channel_layout;
62 char *channel_layout_str;
64 int got_format_from_params;
66 } BufferSourceContext;
68 #define CHECK_VIDEO_PARAM_CHANGE(s, c, width, height, format)\
69 if (c->w != width || c->h != height || c->pix_fmt != format) {\
70 av_log(s, AV_LOG_ERROR, "Changing frame properties on the fly is not supported.\n");\
71 return AVERROR(EINVAL);\
74 #define CHECK_AUDIO_PARAM_CHANGE(s, c, srate, ch_layout, format)\
75 if (c->sample_fmt != format || c->sample_rate != srate ||\
76 c->channel_layout != ch_layout) {\
77 av_log(s, AV_LOG_ERROR, "Changing frame properties on the fly is not supported.\n");\
78 return AVERROR(EINVAL);\
81 AVBufferSrcParameters *av_buffersrc_parameters_alloc(void)
83 AVBufferSrcParameters *par = av_mallocz(sizeof(*par));
92 int av_buffersrc_parameters_set(AVFilterContext *ctx, AVBufferSrcParameters *param)
94 BufferSourceContext *s = ctx->priv;
96 if (param->time_base.num > 0 && param->time_base.den > 0)
97 s->time_base = param->time_base;
99 switch (ctx->filter->outputs[0].type) {
100 case AVMEDIA_TYPE_VIDEO:
101 if (param->format != AV_PIX_FMT_NONE) {
102 s->got_format_from_params = 1;
103 s->pix_fmt = param->format;
105 if (param->width > 0)
107 if (param->height > 0)
108 s->h = param->height;
109 if (param->sample_aspect_ratio.num > 0 && param->sample_aspect_ratio.den > 0)
110 s->pixel_aspect = param->sample_aspect_ratio;
111 if (param->frame_rate.num > 0 && param->frame_rate.den > 0)
112 s->frame_rate = param->frame_rate;
113 if (param->hw_frames_ctx) {
114 av_buffer_unref(&s->hw_frames_ctx);
115 s->hw_frames_ctx = av_buffer_ref(param->hw_frames_ctx);
116 if (!s->hw_frames_ctx)
117 return AVERROR(ENOMEM);
120 case AVMEDIA_TYPE_AUDIO:
121 if (param->format != AV_SAMPLE_FMT_NONE) {
122 s->got_format_from_params = 1;
123 s->sample_fmt = param->format;
125 if (param->sample_rate > 0)
126 s->sample_rate = param->sample_rate;
127 if (param->channel_layout)
128 s->channel_layout = param->channel_layout;
137 int attribute_align_arg av_buffersrc_write_frame(AVFilterContext *ctx, const AVFrame *frame)
142 if (!(copy = av_frame_alloc()))
143 return AVERROR(ENOMEM);
144 ret = av_frame_ref(copy, frame);
146 ret = av_buffersrc_add_frame(ctx, copy);
148 av_frame_free(©);
152 int attribute_align_arg av_buffersrc_add_frame(AVFilterContext *ctx,
155 BufferSourceContext *s = ctx->priv;
163 return AVERROR(EINVAL);
165 refcounted = !!frame->buf[0];
167 switch (ctx->outputs[0]->type) {
168 case AVMEDIA_TYPE_VIDEO:
169 CHECK_VIDEO_PARAM_CHANGE(ctx, s, frame->width, frame->height,
172 case AVMEDIA_TYPE_AUDIO:
173 CHECK_AUDIO_PARAM_CHANGE(ctx, s, frame->sample_rate, frame->channel_layout,
177 return AVERROR(EINVAL);
180 if (!av_fifo_space(s->fifo) &&
181 (ret = av_fifo_realloc2(s->fifo, av_fifo_size(s->fifo) +
185 if (!(copy = av_frame_alloc()))
186 return AVERROR(ENOMEM);
189 av_frame_move_ref(copy, frame);
191 ret = av_frame_ref(copy, frame);
193 av_frame_free(©);
198 if ((ret = av_fifo_generic_write(s->fifo, ©, sizeof(copy), NULL)) < 0) {
200 av_frame_move_ref(frame, copy);
201 av_frame_free(©);
208 static av_cold int init_video(AVFilterContext *ctx)
210 BufferSourceContext *c = ctx->priv;
212 if (!(c->pix_fmt_str || c->got_format_from_params) || !c->w || !c->h ||
213 av_q2d(c->time_base) <= 0) {
214 av_log(ctx, AV_LOG_ERROR, "Invalid parameters provided.\n");
215 return AVERROR(EINVAL);
218 if (c->pix_fmt_str) {
219 if ((c->pix_fmt = av_get_pix_fmt(c->pix_fmt_str)) == AV_PIX_FMT_NONE) {
221 c->pix_fmt = strtol(c->pix_fmt_str, &tail, 10);
222 if (*tail || c->pix_fmt < 0 || !av_pix_fmt_desc_get(c->pix_fmt)) {
223 av_log(ctx, AV_LOG_ERROR, "Invalid pixel format string '%s'\n", c->pix_fmt_str);
224 return AVERROR(EINVAL);
229 if (!(c->fifo = av_fifo_alloc(sizeof(AVFrame*))))
230 return AVERROR(ENOMEM);
232 av_log(ctx, AV_LOG_VERBOSE, "w:%d h:%d pixfmt:%s tb:%d/%d sar:%d/%d\n",
233 c->w, c->h, av_get_pix_fmt_name(c->pix_fmt),
234 c->time_base.num, c->time_base.den,
235 c->pixel_aspect.num, c->pixel_aspect.den);
239 #define OFFSET(x) offsetof(BufferSourceContext, x)
240 #define A AV_OPT_FLAG_AUDIO_PARAM
241 #define V AV_OPT_FLAG_VIDEO_PARAM
243 static const AVOption video_options[] = {
244 { "width", NULL, OFFSET(w), AV_OPT_TYPE_INT, { .i64 = 0 }, 0, INT_MAX, V },
245 { "height", NULL, OFFSET(h), AV_OPT_TYPE_INT, { .i64 = 0 }, 0, INT_MAX, V },
246 { "pix_fmt", NULL, OFFSET(pix_fmt_str), AV_OPT_TYPE_STRING, .flags = V },
247 #if FF_API_OLD_FILTER_OPTS
248 /* those 4 are for compatibility with the old option passing system where each filter
249 * did its own parsing */
250 { "time_base_num", "deprecated, do not use", OFFSET(time_base.num), AV_OPT_TYPE_INT, { .i64 = 0 }, 0, INT_MAX, V },
251 { "time_base_den", "deprecated, do not use", OFFSET(time_base.den), AV_OPT_TYPE_INT, { .i64 = 0 }, 0, INT_MAX, V },
252 { "sar_num", "deprecated, do not use", OFFSET(pixel_aspect.num), AV_OPT_TYPE_INT, { .i64 = 0 }, 0, INT_MAX, V },
253 { "sar_den", "deprecated, do not use", OFFSET(pixel_aspect.den), AV_OPT_TYPE_INT, { .i64 = 0 }, 0, INT_MAX, V },
255 { "sar", "sample aspect ratio", OFFSET(pixel_aspect), AV_OPT_TYPE_RATIONAL, { .dbl = 0 }, 0, DBL_MAX, V },
256 { "time_base", NULL, OFFSET(time_base), AV_OPT_TYPE_RATIONAL, { .dbl = 0 }, 0, DBL_MAX, V },
257 { "frame_rate", NULL, OFFSET(frame_rate), AV_OPT_TYPE_RATIONAL, { .dbl = 0 }, 0, DBL_MAX, V },
261 static const AVClass buffer_class = {
262 .class_name = "buffer source",
263 .item_name = av_default_item_name,
264 .option = video_options,
265 .version = LIBAVUTIL_VERSION_INT,
268 static const AVOption audio_options[] = {
269 { "time_base", NULL, OFFSET(time_base), AV_OPT_TYPE_RATIONAL, { .dbl = 0 }, 0, INT_MAX, A },
270 { "sample_rate", NULL, OFFSET(sample_rate), AV_OPT_TYPE_INT, { .i64 = 0 }, 0, INT_MAX, A },
271 { "sample_fmt", NULL, OFFSET(sample_fmt_str), AV_OPT_TYPE_STRING, .flags = A },
272 { "channel_layout", NULL, OFFSET(channel_layout_str), AV_OPT_TYPE_STRING, .flags = A },
276 static const AVClass abuffer_class = {
277 .class_name = "abuffer source",
278 .item_name = av_default_item_name,
279 .option = audio_options,
280 .version = LIBAVUTIL_VERSION_INT,
283 static av_cold int init_audio(AVFilterContext *ctx)
285 BufferSourceContext *s = ctx->priv;
288 if (!(s->sample_fmt_str || s->got_format_from_params)) {
289 av_log(ctx, AV_LOG_ERROR, "Sample format not provided\n");
290 return AVERROR(EINVAL);
292 if (s->sample_fmt_str)
293 s->sample_fmt = av_get_sample_fmt(s->sample_fmt_str);
295 if (s->sample_fmt == AV_SAMPLE_FMT_NONE) {
296 av_log(ctx, AV_LOG_ERROR, "Invalid sample format %s.\n",
298 return AVERROR(EINVAL);
301 if (s->channel_layout_str)
302 s->channel_layout = av_get_channel_layout(s->channel_layout_str);
304 if (!s->channel_layout) {
305 av_log(ctx, AV_LOG_ERROR, "Invalid channel layout %s.\n",
306 s->channel_layout_str);
307 return AVERROR(EINVAL);
310 if (!(s->fifo = av_fifo_alloc(sizeof(AVFrame*))))
311 return AVERROR(ENOMEM);
313 if (!s->time_base.num)
314 s->time_base = (AVRational){1, s->sample_rate};
316 av_log(ctx, AV_LOG_VERBOSE, "tb:%d/%d samplefmt:%s samplerate: %d "
317 "ch layout:%s\n", s->time_base.num, s->time_base.den, s->sample_fmt_str,
318 s->sample_rate, s->channel_layout_str);
323 static av_cold void uninit(AVFilterContext *ctx)
325 BufferSourceContext *s = ctx->priv;
326 while (s->fifo && av_fifo_size(s->fifo)) {
328 av_fifo_generic_read(s->fifo, &frame, sizeof(frame), NULL);
329 av_frame_free(&frame);
331 av_buffer_unref(&s->hw_frames_ctx);
332 av_fifo_free(s->fifo);
336 static int query_formats(AVFilterContext *ctx)
338 BufferSourceContext *c = ctx->priv;
339 AVFilterChannelLayouts *channel_layouts = NULL;
340 AVFilterFormats *formats = NULL;
341 AVFilterFormats *samplerates = NULL;
343 switch (ctx->outputs[0]->type) {
344 case AVMEDIA_TYPE_VIDEO:
345 ff_add_format(&formats, c->pix_fmt);
346 ff_set_common_formats(ctx, formats);
348 case AVMEDIA_TYPE_AUDIO:
349 ff_add_format(&formats, c->sample_fmt);
350 ff_set_common_formats(ctx, formats);
352 ff_add_format(&samplerates, c->sample_rate);
353 ff_set_common_samplerates(ctx, samplerates);
355 ff_add_channel_layout(&channel_layouts, c->channel_layout);
356 ff_set_common_channel_layouts(ctx, channel_layouts);
359 return AVERROR(EINVAL);
365 static int config_props(AVFilterLink *link)
367 BufferSourceContext *c = link->src->priv;
369 switch (link->type) {
370 case AVMEDIA_TYPE_VIDEO:
373 link->sample_aspect_ratio = c->pixel_aspect;
375 if (c->hw_frames_ctx) {
376 link->hw_frames_ctx = av_buffer_ref(c->hw_frames_ctx);
377 if (!link->hw_frames_ctx)
378 return AVERROR(ENOMEM);
381 case AVMEDIA_TYPE_AUDIO:
382 link->channel_layout = c->channel_layout;
383 link->sample_rate = c->sample_rate;
386 return AVERROR(EINVAL);
389 link->time_base = c->time_base;
390 link->frame_rate = c->frame_rate;
394 static int request_frame(AVFilterLink *link)
396 BufferSourceContext *c = link->src->priv;
400 if (!av_fifo_size(c->fifo)) {
403 return AVERROR(EAGAIN);
405 av_fifo_generic_read(c->fifo, &frame, sizeof(frame), NULL);
407 ret = ff_filter_frame(link, frame);
412 static int poll_frame(AVFilterLink *link)
414 BufferSourceContext *c = link->src->priv;
415 int size = av_fifo_size(c->fifo);
418 return size/sizeof(AVFrame*);
421 static const AVFilterPad avfilter_vsrc_buffer_outputs[] = {
424 .type = AVMEDIA_TYPE_VIDEO,
425 .request_frame = request_frame,
426 .poll_frame = poll_frame,
427 .config_props = config_props,
432 AVFilter ff_vsrc_buffer = {
434 .description = NULL_IF_CONFIG_SMALL("Buffer video frames, and make them accessible to the filterchain."),
435 .priv_size = sizeof(BufferSourceContext),
436 .priv_class = &buffer_class,
437 .query_formats = query_formats,
443 .outputs = avfilter_vsrc_buffer_outputs,
446 static const AVFilterPad avfilter_asrc_abuffer_outputs[] = {
449 .type = AVMEDIA_TYPE_AUDIO,
450 .request_frame = request_frame,
451 .poll_frame = poll_frame,
452 .config_props = config_props,
457 AVFilter ff_asrc_abuffer = {
459 .description = NULL_IF_CONFIG_SMALL("Buffer audio frames, and make them accessible to the filterchain."),
460 .priv_size = sizeof(BufferSourceContext),
461 .priv_class = &abuffer_class,
462 .query_formats = query_formats,
468 .outputs = avfilter_asrc_abuffer_outputs,