2 * Copyright (c) 2008 Vitor Sessak
4 * This file is part of FFmpeg.
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.
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.
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
23 * memory buffer source filter
28 #include "buffersrc.h"
34 #include "libavutil/audioconvert.h"
35 #include "libavutil/common.h"
36 #include "libavutil/fifo.h"
37 #include "libavutil/imgutils.h"
38 #include "libavutil/opt.h"
39 #include "libavutil/samplefmt.h"
44 AVRational time_base; ///< time_base to set in the output link
45 AVRational frame_rate; ///< frame_rate to set in the output link
46 unsigned nb_failed_requests;
47 unsigned warning_limit;
51 enum PixelFormat pix_fmt;
52 AVRational pixel_aspect;
57 enum AVSampleFormat sample_fmt;
59 uint64_t channel_layout;
60 char *channel_layout_str;
63 } BufferSourceContext;
65 #define CHECK_VIDEO_PARAM_CHANGE(s, c, width, height, format)\
66 if (c->w != width || c->h != height || c->pix_fmt != format) {\
67 av_log(s, AV_LOG_ERROR, "Changing frame properties on the fly is not supported.\n");\
68 return AVERROR(EINVAL);\
71 #define CHECK_AUDIO_PARAM_CHANGE(s, c, srate, ch_layout, format)\
72 if (c->sample_fmt != format || c->sample_rate != srate ||\
73 c->channel_layout != ch_layout) {\
74 av_log(s, AV_LOG_ERROR, "Changing frame properties on the fly is not supported.\n");\
75 return AVERROR(EINVAL);\
78 int av_buffersrc_add_frame(AVFilterContext *buffer_src,
79 const AVFrame *frame, int flags)
81 AVFilterBufferRef *picref;
84 if (!frame) /* NULL for EOF */
85 return av_buffersrc_add_ref(buffer_src, NULL, flags);
87 picref = avfilter_get_buffer_ref_from_frame(buffer_src->outputs[0]->type,
88 frame, AV_PERM_WRITE);
90 return AVERROR(ENOMEM);
91 ret = av_buffersrc_add_ref(buffer_src, picref, flags);
92 picref->buf->data[0] = NULL;
93 avfilter_unref_buffer(picref);
97 int av_buffersrc_write_frame(AVFilterContext *buffer_filter, AVFrame *frame)
99 return av_buffersrc_add_frame(buffer_filter, frame, 0);
102 int av_buffersrc_add_ref(AVFilterContext *s, AVFilterBufferRef *buf, int flags)
104 BufferSourceContext *c = s->priv;
105 AVFilterBufferRef *to_free = NULL;
112 return AVERROR(EINVAL);
114 if (!av_fifo_space(c->fifo) &&
115 (ret = av_fifo_realloc2(c->fifo, av_fifo_size(c->fifo) +
119 if (!(flags & AV_BUFFERSRC_FLAG_NO_CHECK_FORMAT)) {
120 switch (s->outputs[0]->type) {
121 case AVMEDIA_TYPE_VIDEO:
122 CHECK_VIDEO_PARAM_CHANGE(s, c, buf->video->w, buf->video->h, buf->format);
124 case AVMEDIA_TYPE_AUDIO:
125 CHECK_AUDIO_PARAM_CHANGE(s, c, buf->audio->sample_rate, buf->audio->channel_layout,
129 return AVERROR(EINVAL);
132 if (!(flags & AV_BUFFERSRC_FLAG_NO_COPY))
133 to_free = buf = ff_copy_buffer_ref(s->outputs[0], buf);
137 if ((ret = av_fifo_generic_write(c->fifo, &buf, sizeof(buf), NULL)) < 0) {
138 avfilter_unref_buffer(to_free);
141 c->nb_failed_requests = 0;
142 if (c->warning_limit &&
143 av_fifo_size(c->fifo) / sizeof(buf) >= c->warning_limit) {
144 av_log(s, AV_LOG_WARNING,
145 "%d buffers queued in %s, something may be wrong.\n",
147 (char *)av_x_if_null(s->name, s->filter->name));
148 c->warning_limit *= 10;
154 #ifdef FF_API_BUFFERSRC_BUFFER
155 int av_buffersrc_buffer(AVFilterContext *s, AVFilterBufferRef *buf)
157 return av_buffersrc_add_ref(s, buf, AV_BUFFERSRC_FLAG_NO_COPY);
161 unsigned av_buffersrc_get_nb_failed_requests(AVFilterContext *buffer_src)
163 return ((BufferSourceContext *)buffer_src->priv)->nb_failed_requests;
166 #define OFFSET(x) offsetof(BufferSourceContext, x)
167 #define FLAGS AV_OPT_FLAG_FILTERING_PARAM|AV_OPT_FLAG_VIDEO_PARAM
168 static const AVOption buffer_options[] = {
169 { "time_base", NULL, OFFSET(time_base), AV_OPT_TYPE_RATIONAL, { 0 }, 0, INT_MAX, FLAGS },
170 { "frame_rate", NULL, OFFSET(frame_rate), AV_OPT_TYPE_RATIONAL, { 0 }, 0, INT_MAX, FLAGS },
171 { "video_size", NULL, OFFSET(w), AV_OPT_TYPE_IMAGE_SIZE, .flags = FLAGS },
172 { "pix_fmt", NULL, OFFSET(pix_fmt), AV_OPT_TYPE_PIXEL_FMT, .flags = FLAGS },
173 { "pixel_aspect", NULL, OFFSET(pixel_aspect), AV_OPT_TYPE_RATIONAL, { 0 }, 0, INT_MAX, FLAGS },
174 { "sws_param", NULL, OFFSET(sws_param), AV_OPT_TYPE_STRING, .flags = FLAGS },
179 AVFILTER_DEFINE_CLASS(buffer);
181 static av_cold int init_video(AVFilterContext *ctx, const char *args)
183 BufferSourceContext *c = ctx->priv;
184 char pix_fmt_str[128], sws_param[256] = "", *colon, *equal;
187 c->class = &buffer_class;
190 av_log(ctx, AV_LOG_ERROR, "Arguments required\n");
191 return AVERROR(EINVAL);
193 colon = strchr(args, ':');
194 equal = strchr(args, '=');
195 if (equal && (!colon || equal < colon)) {
196 av_opt_set_defaults(c);
197 ret = av_set_options_string(c, args, "=", ":");
201 if ((n = sscanf(args, "%d:%d:%127[^:]:%d:%d:%d:%d:%255c", &c->w, &c->h, pix_fmt_str,
202 &c->time_base.num, &c->time_base.den,
203 &c->pixel_aspect.num, &c->pixel_aspect.den, sws_param)) < 7) {
204 av_log(ctx, AV_LOG_ERROR, "Expected at least 7 arguments, but only %d found in '%s'\n", n, args);
205 ret = AVERROR(EINVAL);
208 av_log(ctx, AV_LOG_WARNING, "Flat options syntax is deprecated, use key=value pairs\n");
210 if ((ret = ff_parse_pixel_format(&c->pix_fmt, pix_fmt_str, ctx)) < 0)
212 c->sws_param = av_strdup(sws_param);
214 ret = AVERROR(ENOMEM);
219 if (!(c->fifo = av_fifo_alloc(sizeof(AVFilterBufferRef*)))) {
220 ret = AVERROR(ENOMEM);
224 av_log(ctx, AV_LOG_VERBOSE, "w:%d h:%d pixfmt:%s tb:%d/%d fr:%d/%d sar:%d/%d sws_param:%s\n",
225 c->w, c->h, av_pix_fmt_descriptors[c->pix_fmt].name,
226 c->time_base.num, c->time_base.den, c->frame_rate.num, c->frame_rate.den,
227 c->pixel_aspect.num, c->pixel_aspect.den, (char *)av_x_if_null(c->sws_param, ""));
228 c->warning_limit = 100;
236 #define FLAGS AV_OPT_FLAG_FILTERING_PARAM|AV_OPT_FLAG_AUDIO_PARAM
237 static const AVOption abuffer_options[] = {
238 { "time_base", NULL, OFFSET(time_base), AV_OPT_TYPE_RATIONAL, { 0 }, 0, INT_MAX, FLAGS },
239 { "sample_rate", NULL, OFFSET(sample_rate), AV_OPT_TYPE_INT, { 0 }, 0, INT_MAX, FLAGS },
240 { "sample_fmt", NULL, OFFSET(sample_fmt_str), AV_OPT_TYPE_STRING, .flags = FLAGS },
241 { "channel_layout", NULL, OFFSET(channel_layout_str), AV_OPT_TYPE_STRING, .flags = FLAGS },
245 AVFILTER_DEFINE_CLASS(abuffer);
247 static av_cold int init_audio(AVFilterContext *ctx, const char *args)
249 BufferSourceContext *s = ctx->priv;
252 s->class = &abuffer_class;
253 av_opt_set_defaults(s);
255 if ((ret = av_set_options_string(s, args, "=", ":")) < 0)
258 s->sample_fmt = av_get_sample_fmt(s->sample_fmt_str);
259 if (s->sample_fmt == AV_SAMPLE_FMT_NONE) {
260 av_log(ctx, AV_LOG_ERROR, "Invalid sample format '%s'\n",
262 ret = AVERROR(EINVAL);
266 s->channel_layout = av_get_channel_layout(s->channel_layout_str);
267 if (!s->channel_layout) {
268 av_log(ctx, AV_LOG_ERROR, "Invalid channel layout '%s'\n",
269 s->channel_layout_str);
270 ret = AVERROR(EINVAL);
274 if (!(s->fifo = av_fifo_alloc(sizeof(AVFilterBufferRef*)))) {
275 ret = AVERROR(ENOMEM);
279 if (!s->time_base.num)
280 s->time_base = (AVRational){1, s->sample_rate};
282 av_log(ctx, AV_LOG_VERBOSE,
283 "tb:%d/%d samplefmt:%s samplerate:%d chlayout:%s\n",
284 s->time_base.num, s->time_base.den, s->sample_fmt_str,
285 s->sample_rate, s->channel_layout_str);
286 s->warning_limit = 100;
293 static av_cold void uninit(AVFilterContext *ctx)
295 BufferSourceContext *s = ctx->priv;
296 while (s->fifo && av_fifo_size(s->fifo)) {
297 AVFilterBufferRef *buf;
298 av_fifo_generic_read(s->fifo, &buf, sizeof(buf), NULL);
299 avfilter_unref_buffer(buf);
301 av_fifo_free(s->fifo);
303 av_freep(&s->sws_param);
306 static int query_formats(AVFilterContext *ctx)
308 BufferSourceContext *c = ctx->priv;
309 AVFilterChannelLayouts *channel_layouts = NULL;
310 AVFilterFormats *formats = NULL;
311 AVFilterFormats *samplerates = NULL;
313 switch (ctx->outputs[0]->type) {
314 case AVMEDIA_TYPE_VIDEO:
315 ff_add_format(&formats, c->pix_fmt);
316 ff_set_common_formats(ctx, formats);
318 case AVMEDIA_TYPE_AUDIO:
319 ff_add_format(&formats, c->sample_fmt);
320 ff_set_common_formats(ctx, formats);
322 ff_add_format(&samplerates, c->sample_rate);
323 ff_set_common_samplerates(ctx, samplerates);
325 ff_add_channel_layout(&channel_layouts, c->channel_layout);
326 ff_set_common_channel_layouts(ctx, channel_layouts);
329 return AVERROR(EINVAL);
335 static int config_props(AVFilterLink *link)
337 BufferSourceContext *c = link->src->priv;
339 switch (link->type) {
340 case AVMEDIA_TYPE_VIDEO:
343 link->sample_aspect_ratio = c->pixel_aspect;
345 case AVMEDIA_TYPE_AUDIO:
346 link->channel_layout = c->channel_layout;
347 link->sample_rate = c->sample_rate;
350 return AVERROR(EINVAL);
353 link->time_base = c->time_base;
354 link->frame_rate = c->frame_rate;
358 static int request_frame(AVFilterLink *link)
360 BufferSourceContext *c = link->src->priv;
361 AVFilterBufferRef *buf;
364 if (!av_fifo_size(c->fifo)) {
367 c->nb_failed_requests++;
368 return AVERROR(EAGAIN);
370 av_fifo_generic_read(c->fifo, &buf, sizeof(buf), NULL);
372 switch (link->type) {
373 case AVMEDIA_TYPE_VIDEO:
374 if ((ret = ff_start_frame(link, buf)) < 0 ||
375 (ret = ff_draw_slice(link, 0, link->h, 1)) < 0 ||
376 (ret = ff_end_frame(link)) < 0)
379 case AVMEDIA_TYPE_AUDIO:
380 ret = ff_filter_samples(link, buf);
383 avfilter_unref_bufferp(&buf);
384 return AVERROR(EINVAL);
390 static int poll_frame(AVFilterLink *link)
392 BufferSourceContext *c = link->src->priv;
393 int size = av_fifo_size(c->fifo);
396 return size/sizeof(AVFilterBufferRef*);
399 AVFilter avfilter_vsrc_buffer = {
401 .description = NULL_IF_CONFIG_SMALL("Buffer video frames, and make them accessible to the filterchain."),
402 .priv_size = sizeof(BufferSourceContext),
403 .query_formats = query_formats,
408 .inputs = (const AVFilterPad[]) {{ .name = NULL }},
409 .outputs = (const AVFilterPad[]) {{ .name = "default",
410 .type = AVMEDIA_TYPE_VIDEO,
411 .request_frame = request_frame,
412 .poll_frame = poll_frame,
413 .config_props = config_props, },
415 .priv_class = &buffer_class,
418 AVFilter avfilter_asrc_abuffer = {
420 .description = NULL_IF_CONFIG_SMALL("Buffer audio frames, and make them accessible to the filterchain."),
421 .priv_size = sizeof(BufferSourceContext),
422 .query_formats = query_formats,
427 .inputs = (const AVFilterPad[]) {{ .name = NULL }},
428 .outputs = (const AVFilterPad[]) {{ .name = "default",
429 .type = AVMEDIA_TYPE_AUDIO,
430 .request_frame = request_frame,
431 .poll_frame = poll_frame,
432 .config_props = config_props, },
434 .priv_class = &abuffer_class,