2 * Copyright (c) 2008 Vitor Sessak
3 * Copyright (c) 2010 S.N. Hemanth Meenakshisundaram
4 * Copyright (c) 2011 Mina Nagy Zaki
6 * This file is part of FFmpeg.
8 * FFmpeg is free software; you can redistribute it and/or
9 * modify it under the terms of the GNU Lesser General Public
10 * License as published by the Free Software Foundation; either
11 * version 2.1 of the License, or (at your option) any later version.
13 * FFmpeg is distributed in the hope that it will be useful,
14 * but WITHOUT ANY WARRANTY; without even the implied warranty of
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
16 * Lesser General Public License for more details.
18 * You should have received a copy of the GNU Lesser General Public
19 * License along with FFmpeg; if not, write to the Free Software
20 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
25 * memory buffer source filter
31 #include "buffersrc.h"
32 #include "vsrc_buffer.h"
33 #include "asrc_abuffer.h"
34 #include "libavutil/audioconvert.h"
35 #include "libavutil/avstring.h"
36 #include "libavutil/fifo.h"
37 #include "libavutil/imgutils.h"
41 AVRational time_base; ///< time_base to set in the output link
43 unsigned nb_failed_requests;
46 AVFilterContext *scale;
48 enum PixelFormat pix_fmt;
49 AVRational sample_aspect_ratio;
53 // Audio format of incoming buffers
55 unsigned int sample_format;
56 int64_t channel_layout;
59 // Normalization filters
60 AVFilterContext *aconvert;
61 AVFilterContext *aresample;
62 } BufferSourceContext;
66 #define CHECK_PARAM_CHANGE(s, c, width, height, format)\
67 if (c->w != width || c->h != height || c->pix_fmt != format) {\
68 av_log(s, AV_LOG_ERROR, "Changing frame properties on the fly is not supported.\n");\
69 return AVERROR(EINVAL);\
72 int av_vsrc_buffer_add_video_buffer_ref(AVFilterContext *buffer_filter,
73 AVFilterBufferRef *picref, int flags)
75 BufferSourceContext *c = buffer_filter->priv;
76 AVFilterLink *outlink = buffer_filter->outputs[0];
77 AVFilterBufferRef *buf;
84 return AVERROR(EINVAL);
86 if (!av_fifo_space(c->fifo) &&
87 (ret = av_fifo_realloc2(c->fifo, av_fifo_size(c->fifo) +
91 if (picref->video->w != c->w || picref->video->h != c->h || picref->format != c->pix_fmt) {
92 AVFilterContext *scale = buffer_filter->outputs[0]->dst;
94 char scale_param[1024];
96 av_log(buffer_filter, AV_LOG_INFO,
97 "Buffer video input changed from size:%dx%d fmt:%s to size:%dx%d fmt:%s\n",
98 c->w, c->h, av_pix_fmt_descriptors[c->pix_fmt].name,
99 picref->video->w, picref->video->h, av_pix_fmt_descriptors[picref->format].name);
101 if (!scale || strcmp(scale->filter->name, "scale")) {
102 AVFilter *f = avfilter_get_by_name("scale");
104 av_log(buffer_filter, AV_LOG_INFO, "Inserting scaler filter\n");
105 if ((ret = avfilter_open(&scale, f, "Input equalizer")) < 0)
110 snprintf(scale_param, sizeof(scale_param)-1, "%d:%d:%s", c->w, c->h, c->sws_param);
111 if ((ret = avfilter_init_filter(scale, scale_param, NULL)) < 0) {
115 if ((ret = avfilter_insert_filter(buffer_filter->outputs[0], scale, 0, 0)) < 0) {
118 scale->outputs[0]->time_base = scale->inputs[0]->time_base;
120 scale->outputs[0]->format= c->pix_fmt;
121 } else if (!strcmp(scale->filter->name, "scale")) {
122 snprintf(scale_param, sizeof(scale_param)-1, "%d:%d:%s",
123 scale->outputs[0]->w, scale->outputs[0]->h, c->sws_param);
124 scale->filter->init(scale, scale_param, NULL);
127 c->pix_fmt = scale->inputs[0]->format = picref->format;
128 c->w = scale->inputs[0]->w = picref->video->w;
129 c->h = scale->inputs[0]->h = picref->video->h;
131 link = scale->outputs[0];
132 if ((ret = link->srcpad->config_props(link)) < 0)
136 buf = avfilter_get_video_buffer(outlink, AV_PERM_WRITE,
137 picref->video->w, picref->video->h);
138 av_image_copy(buf->data, buf->linesize,
139 (void*)picref->data, picref->linesize,
140 picref->format, picref->video->w, picref->video->h);
141 avfilter_copy_buffer_ref_props(buf, picref);
143 if ((ret = av_fifo_generic_write(c->fifo, &buf, sizeof(buf), NULL)) < 0) {
144 avfilter_unref_buffer(buf);
147 c->nb_failed_requests = 0;
152 int av_buffersrc_buffer(AVFilterContext *s, AVFilterBufferRef *buf)
154 BufferSourceContext *c = s->priv;
161 return AVERROR(EINVAL);
163 if (!av_fifo_space(c->fifo) &&
164 (ret = av_fifo_realloc2(c->fifo, av_fifo_size(c->fifo) +
168 // CHECK_PARAM_CHANGE(s, c, buf->video->w, buf->video->h, buf->format);
170 if ((ret = av_fifo_generic_write(c->fifo, &buf, sizeof(buf), NULL)) < 0)
172 c->nb_failed_requests = 0;
180 int av_vsrc_buffer_add_frame(AVFilterContext *buffer_src,
181 const AVFrame *frame, int flags)
183 BufferSourceContext *c = buffer_src->priv;
184 AVFilterBufferRef *picref;
191 return AVERROR(EINVAL);
193 picref = avfilter_get_video_buffer_ref_from_frame(frame, AV_PERM_WRITE);
195 return AVERROR(ENOMEM);
196 ret = av_vsrc_buffer_add_video_buffer_ref(buffer_src, picref, flags);
197 picref->buf->data[0] = NULL;
198 avfilter_unref_buffer(picref);
204 unsigned av_vsrc_buffer_get_nb_failed_requests(AVFilterContext *buffer_src)
206 return ((BufferSourceContext *)buffer_src->priv)->nb_failed_requests;
209 static av_cold int init_video(AVFilterContext *ctx, const char *args, void *opaque)
211 BufferSourceContext *c = ctx->priv;
212 char pix_fmt_str[128];
217 (n = sscanf(args, "%d:%d:%127[^:]:%d:%d:%d:%d:%255c", &c->w, &c->h, pix_fmt_str,
218 &c->time_base.num, &c->time_base.den,
219 &c->sample_aspect_ratio.num, &c->sample_aspect_ratio.den, c->sws_param)) < 7) {
220 av_log(ctx, AV_LOG_ERROR, "Expected at least 7 arguments, but only %d found in '%s'\n", n, args);
221 return AVERROR(EINVAL);
224 if ((ret = ff_parse_pixel_format(&c->pix_fmt, pix_fmt_str, ctx)) < 0)
227 if (!(c->fifo = av_fifo_alloc(sizeof(AVFilterBufferRef*))))
228 return AVERROR(ENOMEM);
230 av_log(ctx, AV_LOG_INFO, "w:%d h:%d pixfmt:%s tb:%d/%d sar:%d/%d sws_param:%s\n",
231 c->w, c->h, av_pix_fmt_descriptors[c->pix_fmt].name,
232 c->time_base.num, c->time_base.den,
233 c->sample_aspect_ratio.num, c->sample_aspect_ratio.den, c->sws_param);
237 static av_cold int init_audio(AVFilterContext *ctx, const char *args0, void *opaque)
239 BufferSourceContext *abuffer = ctx->priv;
240 char *arg = NULL, *ptr, chlayout_str[16];
241 char *args = av_strdup(args0);
244 arg = av_strtok(args, ":", &ptr);
246 #define ADD_FORMAT(fmt_name) \
249 if ((ret = ff_parse_##fmt_name(&abuffer->fmt_name, arg, ctx)) < 0) { \
254 arg = av_strtok(NULL, ":", &ptr)
256 ADD_FORMAT(sample_rate);
257 ADD_FORMAT(sample_format);
258 ADD_FORMAT(channel_layout);
259 ADD_FORMAT(packing_format);
261 abuffer->fifo = av_fifo_alloc(FIFO_SIZE*sizeof(AVFilterBufferRef*));
262 if (!abuffer->fifo) {
263 av_log(ctx, AV_LOG_ERROR, "Failed to allocate fifo, filter init failed.\n");
264 return AVERROR(ENOMEM);
267 av_get_channel_layout_string(chlayout_str, sizeof(chlayout_str),
268 -1, abuffer->channel_layout);
269 av_log(ctx, AV_LOG_INFO, "format:%s layout:%s rate:%d\n",
270 av_get_sample_fmt_name(abuffer->sample_format), chlayout_str,
271 abuffer->sample_rate);
277 av_log(ctx, AV_LOG_ERROR, "Invalid arguments, must be of the form "
278 "sample_rate:sample_fmt:channel_layout:packing\n");
280 return AVERROR(EINVAL);
283 static av_cold void uninit(AVFilterContext *ctx)
285 BufferSourceContext *s = ctx->priv;
286 while (s->fifo && av_fifo_size(s->fifo)) {
287 AVFilterBufferRef *buf;
288 av_fifo_generic_read(s->fifo, &buf, sizeof(buf), NULL);
289 avfilter_unref_buffer(buf);
291 av_fifo_free(s->fifo);
293 avfilter_free(s->scale);
297 static int query_formats_video(AVFilterContext *ctx)
299 BufferSourceContext *c = ctx->priv;
300 enum PixelFormat pix_fmts[] = { c->pix_fmt, PIX_FMT_NONE };
302 avfilter_set_common_pixel_formats(ctx, avfilter_make_format_list(pix_fmts));
306 static int query_formats_audio(AVFilterContext *ctx)
308 BufferSourceContext *abuffer = ctx->priv;
309 AVFilterFormats *formats;
312 avfilter_add_format(&formats, abuffer->sample_format);
313 avfilter_set_common_sample_formats(ctx, formats);
316 avfilter_add_format(&formats, abuffer->channel_layout);
317 avfilter_set_common_channel_layouts(ctx, formats);
320 avfilter_add_format(&formats, abuffer->packing_format);
321 avfilter_set_common_packing_formats(ctx, formats);
326 static int config_output_video(AVFilterLink *link)
328 BufferSourceContext *c = link->src->priv;
332 link->sample_aspect_ratio = c->sample_aspect_ratio;
333 link->time_base = c->time_base;
338 static int config_output_audio(AVFilterLink *outlink)
340 BufferSourceContext *abuffer = outlink->src->priv;
341 outlink->sample_rate = abuffer->sample_rate;
345 static int request_frame(AVFilterLink *link)
347 BufferSourceContext *c = link->src->priv;
348 AVFilterBufferRef *buf;
350 if (!av_fifo_size(c->fifo)) {
353 c->nb_failed_requests++;
354 return AVERROR(EAGAIN);
356 av_fifo_generic_read(c->fifo, &buf, sizeof(buf), NULL);
358 switch (link->type) {
359 case AVMEDIA_TYPE_VIDEO:
361 avfilter_start_frame(link, avfilter_ref_buffer(buf, ~0));
362 avfilter_draw_slice(link, 0, link->h, 1);
363 avfilter_end_frame(link);
364 avfilter_unref_buffer(buf);
366 case AVMEDIA_TYPE_AUDIO:
367 avfilter_filter_samples(link, avfilter_ref_buffer(buf, ~0));
368 avfilter_unref_buffer(buf);
371 return AVERROR(ENOSYS);
376 static int poll_frame(AVFilterLink *link)
378 BufferSourceContext *c = link->src->priv;
379 int size = av_fifo_size(c->fifo);
382 return size/sizeof(AVFilterBufferRef*);
385 static void buf_free(AVFilterBuffer *ptr)
391 static void set_link_source(AVFilterContext *src, AVFilterLink *link)
394 link->srcpad = &(src->output_pads[0]);
395 src->outputs[0] = link;
398 static int reconfigure_filter(BufferSourceContext *abuffer, AVFilterContext *filt_ctx)
401 AVFilterLink * const inlink = filt_ctx->inputs[0];
402 AVFilterLink * const outlink = filt_ctx->outputs[0];
404 inlink->format = abuffer->sample_format;
405 inlink->channel_layout = abuffer->channel_layout;
406 inlink->planar = abuffer->packing_format;
407 inlink->sample_rate = abuffer->sample_rate;
409 filt_ctx->filter->uninit(filt_ctx);
410 memset(filt_ctx->priv, 0, filt_ctx->filter->priv_size);
411 if ((ret = filt_ctx->filter->init(filt_ctx, NULL , NULL)) < 0)
413 if ((ret = inlink->srcpad->config_props(inlink)) < 0)
415 return outlink->srcpad->config_props(outlink);
418 static int insert_filter(BufferSourceContext *abuffer,
419 AVFilterLink *link, AVFilterContext **filt_ctx,
420 const char *filt_name)
424 if ((ret = avfilter_open(filt_ctx, avfilter_get_by_name(filt_name), NULL)) < 0)
427 link->src->outputs[0] = NULL;
428 if ((ret = avfilter_link(link->src, 0, *filt_ctx, 0)) < 0) {
429 link->src->outputs[0] = link;
433 set_link_source(*filt_ctx, link);
435 if ((ret = reconfigure_filter(abuffer, *filt_ctx)) < 0) {
436 avfilter_free(*filt_ctx);
443 static void remove_filter(AVFilterContext **filt_ctx)
445 AVFilterLink *outlink = (*filt_ctx)->outputs[0];
446 AVFilterContext *src = (*filt_ctx)->inputs[0]->src;
448 (*filt_ctx)->outputs[0] = NULL;
449 avfilter_free(*filt_ctx);
452 set_link_source(src, outlink);
455 static inline void log_input_change(void *ctx, AVFilterLink *link, AVFilterBufferRef *ref)
457 char old_layout_str[16], new_layout_str[16];
458 av_get_channel_layout_string(old_layout_str, sizeof(old_layout_str),
459 -1, link->channel_layout);
460 av_get_channel_layout_string(new_layout_str, sizeof(new_layout_str),
461 -1, ref->audio->channel_layout);
462 av_log(ctx, AV_LOG_INFO,
463 "Audio input format changed: "
464 "%s:%s:%d -> %s:%s:%d, normalizing\n",
465 av_get_sample_fmt_name(link->format),
466 old_layout_str, (int)link->sample_rate,
467 av_get_sample_fmt_name(ref->format),
468 new_layout_str, ref->audio->sample_rate);
471 int av_asrc_buffer_add_audio_buffer_ref(AVFilterContext *ctx,
472 AVFilterBufferRef *samplesref,
475 BufferSourceContext *abuffer = ctx->priv;
479 if (av_fifo_space(abuffer->fifo) < sizeof(samplesref)) {
480 av_log(ctx, AV_LOG_ERROR,
481 "Buffering limit reached. Please consume some available frames "
482 "before adding new ones.\n");
483 return AVERROR(EINVAL);
488 link = ctx->outputs[0];
489 if (samplesref->audio->sample_rate != link->sample_rate) {
491 log_input_change(ctx, link, samplesref);
494 abuffer->sample_rate = samplesref->audio->sample_rate;
496 if (!abuffer->aresample) {
497 ret = insert_filter(abuffer, link, &abuffer->aresample, "aresample");
498 if (ret < 0) return ret;
500 link = abuffer->aresample->outputs[0];
501 if (samplesref->audio->sample_rate == link->sample_rate)
502 remove_filter(&abuffer->aresample);
504 if ((ret = reconfigure_filter(abuffer, abuffer->aresample)) < 0)
509 link = ctx->outputs[0];
510 if (samplesref->format != link->format ||
511 samplesref->audio->channel_layout != link->channel_layout ||
512 samplesref->audio->planar != link->planar) {
514 if (!logged) log_input_change(ctx, link, samplesref);
516 abuffer->sample_format = samplesref->format;
517 abuffer->channel_layout = samplesref->audio->channel_layout;
518 abuffer->packing_format = samplesref->audio->planar;
520 if (!abuffer->aconvert) {
521 ret = insert_filter(abuffer, link, &abuffer->aconvert, "aconvert");
522 if (ret < 0) return ret;
524 link = abuffer->aconvert->outputs[0];
525 if (samplesref->format == link->format &&
526 samplesref->audio->channel_layout == link->channel_layout &&
527 samplesref->audio->planar == link->planar
529 remove_filter(&abuffer->aconvert);
531 if ((ret = reconfigure_filter(abuffer, abuffer->aconvert)) < 0)
536 if (sizeof(samplesref) != av_fifo_generic_write(abuffer->fifo, &samplesref,
537 sizeof(samplesref), NULL)) {
538 av_log(ctx, AV_LOG_ERROR, "Error while writing to FIFO\n");
539 return AVERROR(EINVAL);
545 int av_asrc_buffer_add_samples(AVFilterContext *ctx,
546 uint8_t *data[8], int linesize[8],
547 int nb_samples, int sample_rate,
548 int sample_fmt, int64_t channel_layout, int planar,
549 int64_t pts, int av_unused flags)
551 AVFilterBufferRef *samplesref;
553 samplesref = avfilter_get_audio_buffer_ref_from_arrays(
554 data, linesize, AV_PERM_WRITE,
556 sample_fmt, channel_layout, planar);
558 return AVERROR(ENOMEM);
560 samplesref->buf->free = buf_free;
561 samplesref->pts = pts;
562 samplesref->audio->sample_rate = sample_rate;
564 return av_asrc_buffer_add_audio_buffer_ref(ctx, samplesref, 0);
567 int av_asrc_buffer_add_buffer(AVFilterContext *ctx,
568 uint8_t *buf, int buf_size, int sample_rate,
569 int sample_fmt, int64_t channel_layout, int planar,
570 int64_t pts, int av_unused flags)
572 uint8_t *data[8] = {0};
574 int nb_channels = av_get_channel_layout_nb_channels(channel_layout),
575 nb_samples = buf_size / nb_channels / av_get_bytes_per_sample(sample_fmt);
577 av_samples_fill_arrays(data, linesize,
578 buf, nb_channels, nb_samples,
581 return av_asrc_buffer_add_samples(ctx,
582 data, linesize, nb_samples,
584 sample_fmt, channel_layout, planar,
588 AVFilter avfilter_vsrc_buffer = {
590 .description = NULL_IF_CONFIG_SMALL("Buffer video frames, and make them accessible to the filterchain."),
591 .priv_size = sizeof(BufferSourceContext),
592 .query_formats = query_formats_video,
597 .inputs = (const AVFilterPad[]) {{ .name = NULL }},
598 .outputs = (const AVFilterPad[]) {{ .name = "default",
599 .type = AVMEDIA_TYPE_VIDEO,
600 .request_frame = request_frame,
601 .poll_frame = poll_frame,
602 .config_props = config_output_video, },
606 #ifdef CONFIG_ABUFFER_FILTER
608 AVFilter avfilter_asrc_abuffer = {
610 .description = NULL_IF_CONFIG_SMALL("Buffer audio frames, and make them accessible to the filterchain."),
611 .priv_size = sizeof(BufferSourceContext),
612 .query_formats = query_formats_audio,
617 .inputs = (const AVFilterPad[]) {{ .name = NULL }},
618 .outputs = (const AVFilterPad[]) {{ .name = "default",
619 .type = AVMEDIA_TYPE_AUDIO,
620 .request_frame = request_frame,
621 .poll_frame = poll_frame,
622 .config_props = config_output_audio, },