mirror of
https://github.com/FFmpeg/FFmpeg.git
synced 2024-12-02 03:06:28 +02:00
5033a1af17
The sample rate and channel layout are negotiated and set by the filter graph system, the filters must not set them.
435 lines
13 KiB
C
435 lines
13 KiB
C
/*
|
|
* Copyright (c) 2008 Vitor Sessak
|
|
*
|
|
* This file is part of FFmpeg.
|
|
*
|
|
* FFmpeg is free software; you can redistribute it and/or
|
|
* modify it under the terms of the GNU Lesser General Public
|
|
* License as published by the Free Software Foundation; either
|
|
* version 2.1 of the License, or (at your option) any later version.
|
|
*
|
|
* FFmpeg is distributed in the hope that it will be useful,
|
|
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
|
|
* Lesser General Public License for more details.
|
|
*
|
|
* You should have received a copy of the GNU Lesser General Public
|
|
* License along with FFmpeg; if not, write to the Free Software
|
|
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
|
|
*/
|
|
|
|
/**
|
|
* @file
|
|
* memory buffer source filter
|
|
*/
|
|
|
|
#include "libavutil/channel_layout.h"
|
|
#include "libavutil/common.h"
|
|
#include "libavutil/fifo.h"
|
|
#include "libavutil/imgutils.h"
|
|
#include "libavutil/opt.h"
|
|
#include "libavutil/samplefmt.h"
|
|
#include "audio.h"
|
|
#include "avfilter.h"
|
|
#include "buffersrc.h"
|
|
#include "formats.h"
|
|
#include "internal.h"
|
|
#include "video.h"
|
|
#include "avcodec.h"
|
|
|
|
typedef struct {
|
|
const AVClass *class;
|
|
AVFifoBuffer *fifo;
|
|
AVRational time_base; ///< time_base to set in the output link
|
|
AVRational frame_rate; ///< frame_rate to set in the output link
|
|
unsigned nb_failed_requests;
|
|
unsigned warning_limit;
|
|
|
|
/* video only */
|
|
int w, h;
|
|
enum AVPixelFormat pix_fmt;
|
|
AVRational pixel_aspect;
|
|
char *sws_param;
|
|
|
|
/* audio only */
|
|
int sample_rate;
|
|
enum AVSampleFormat sample_fmt;
|
|
char *sample_fmt_str;
|
|
uint64_t channel_layout;
|
|
char *channel_layout_str;
|
|
|
|
int eof;
|
|
} BufferSourceContext;
|
|
|
|
#define CHECK_VIDEO_PARAM_CHANGE(s, c, width, height, format)\
|
|
if (c->w != width || c->h != height || c->pix_fmt != format) {\
|
|
av_log(s, AV_LOG_INFO, "Changing frame properties on the fly is not supported by all filters.\n");\
|
|
}
|
|
|
|
#define CHECK_AUDIO_PARAM_CHANGE(s, c, srate, ch_layout, format)\
|
|
if (c->sample_fmt != format || c->sample_rate != srate ||\
|
|
c->channel_layout != ch_layout) {\
|
|
av_log(s, AV_LOG_ERROR, "Changing frame properties on the fly is not supported.\n");\
|
|
return AVERROR(EINVAL);\
|
|
}
|
|
|
|
int av_buffersrc_add_frame(AVFilterContext *buffer_src,
|
|
const AVFrame *frame, int flags)
|
|
{
|
|
AVFilterBufferRef *picref;
|
|
int ret;
|
|
|
|
if (!frame) /* NULL for EOF */
|
|
return av_buffersrc_add_ref(buffer_src, NULL, flags);
|
|
|
|
picref = avfilter_get_buffer_ref_from_frame(buffer_src->outputs[0]->type,
|
|
frame, AV_PERM_WRITE);
|
|
if (!picref)
|
|
return AVERROR(ENOMEM);
|
|
ret = av_buffersrc_add_ref(buffer_src, picref, flags);
|
|
picref->buf->data[0] = NULL;
|
|
avfilter_unref_buffer(picref);
|
|
return ret;
|
|
}
|
|
|
|
int av_buffersrc_write_frame(AVFilterContext *buffer_filter, const AVFrame *frame)
|
|
{
|
|
return av_buffersrc_add_frame(buffer_filter, frame, 0);
|
|
}
|
|
|
|
int av_buffersrc_add_ref(AVFilterContext *s, AVFilterBufferRef *buf, int flags)
|
|
{
|
|
BufferSourceContext *c = s->priv;
|
|
AVFilterBufferRef *to_free = NULL;
|
|
int ret;
|
|
|
|
if (!buf) {
|
|
c->eof = 1;
|
|
return 0;
|
|
} else if (c->eof)
|
|
return AVERROR(EINVAL);
|
|
|
|
if (!av_fifo_space(c->fifo) &&
|
|
(ret = av_fifo_realloc2(c->fifo, av_fifo_size(c->fifo) +
|
|
sizeof(buf))) < 0)
|
|
return ret;
|
|
|
|
if (!(flags & AV_BUFFERSRC_FLAG_NO_CHECK_FORMAT)) {
|
|
switch (s->outputs[0]->type) {
|
|
case AVMEDIA_TYPE_VIDEO:
|
|
CHECK_VIDEO_PARAM_CHANGE(s, c, buf->video->w, buf->video->h, buf->format);
|
|
break;
|
|
case AVMEDIA_TYPE_AUDIO:
|
|
CHECK_AUDIO_PARAM_CHANGE(s, c, buf->audio->sample_rate, buf->audio->channel_layout,
|
|
buf->format);
|
|
break;
|
|
default:
|
|
return AVERROR(EINVAL);
|
|
}
|
|
}
|
|
if (!(flags & AV_BUFFERSRC_FLAG_NO_COPY))
|
|
to_free = buf = ff_copy_buffer_ref(s->outputs[0], buf);
|
|
if(!buf)
|
|
return -1;
|
|
|
|
if ((ret = av_fifo_generic_write(c->fifo, &buf, sizeof(buf), NULL)) < 0) {
|
|
avfilter_unref_buffer(to_free);
|
|
return ret;
|
|
}
|
|
c->nb_failed_requests = 0;
|
|
if (c->warning_limit &&
|
|
av_fifo_size(c->fifo) / sizeof(buf) >= c->warning_limit) {
|
|
av_log(s, AV_LOG_WARNING,
|
|
"%d buffers queued in %s, something may be wrong.\n",
|
|
c->warning_limit,
|
|
(char *)av_x_if_null(s->name, s->filter->name));
|
|
c->warning_limit *= 10;
|
|
}
|
|
|
|
if ((flags & AV_BUFFERSRC_FLAG_PUSH))
|
|
if ((ret = s->output_pads[0].request_frame(s->outputs[0])) < 0)
|
|
return ret;
|
|
|
|
return 0;
|
|
}
|
|
|
|
#ifdef FF_API_BUFFERSRC_BUFFER
|
|
int av_buffersrc_buffer(AVFilterContext *s, AVFilterBufferRef *buf)
|
|
{
|
|
return av_buffersrc_add_ref(s, buf, AV_BUFFERSRC_FLAG_NO_COPY);
|
|
}
|
|
#endif
|
|
|
|
unsigned av_buffersrc_get_nb_failed_requests(AVFilterContext *buffer_src)
|
|
{
|
|
return ((BufferSourceContext *)buffer_src->priv)->nb_failed_requests;
|
|
}
|
|
|
|
#define OFFSET(x) offsetof(BufferSourceContext, x)
|
|
#define FLAGS AV_OPT_FLAG_FILTERING_PARAM|AV_OPT_FLAG_VIDEO_PARAM
|
|
static const AVOption buffer_options[] = {
|
|
{ "time_base", NULL, OFFSET(time_base), AV_OPT_TYPE_RATIONAL, { .dbl = 0 }, 0, INT_MAX, FLAGS },
|
|
{ "frame_rate", NULL, OFFSET(frame_rate), AV_OPT_TYPE_RATIONAL, { .dbl = 0 }, 0, INT_MAX, FLAGS },
|
|
{ "video_size", NULL, OFFSET(w), AV_OPT_TYPE_IMAGE_SIZE, .flags = FLAGS },
|
|
{ "pix_fmt", NULL, OFFSET(pix_fmt), AV_OPT_TYPE_PIXEL_FMT, .flags = FLAGS },
|
|
{ "pixel_aspect", NULL, OFFSET(pixel_aspect), AV_OPT_TYPE_RATIONAL, { .dbl = 0 }, 0, INT_MAX, FLAGS },
|
|
{ "sws_param", NULL, OFFSET(sws_param), AV_OPT_TYPE_STRING, .flags = FLAGS },
|
|
{ NULL },
|
|
};
|
|
#undef FLAGS
|
|
|
|
AVFILTER_DEFINE_CLASS(buffer);
|
|
|
|
static av_cold int init_video(AVFilterContext *ctx, const char *args)
|
|
{
|
|
BufferSourceContext *c = ctx->priv;
|
|
char pix_fmt_str[128], sws_param[256] = "", *colon, *equal;
|
|
int ret, n = 0;
|
|
|
|
c->class = &buffer_class;
|
|
|
|
if (!args) {
|
|
av_log(ctx, AV_LOG_ERROR, "Arguments required\n");
|
|
return AVERROR(EINVAL);
|
|
}
|
|
colon = strchr(args, ':');
|
|
equal = strchr(args, '=');
|
|
if (equal && (!colon || equal < colon)) {
|
|
av_opt_set_defaults(c);
|
|
ret = av_set_options_string(c, args, "=", ":");
|
|
if (ret < 0)
|
|
goto fail;
|
|
} else {
|
|
if ((n = sscanf(args, "%d:%d:%127[^:]:%d:%d:%d:%d:%255c", &c->w, &c->h, pix_fmt_str,
|
|
&c->time_base.num, &c->time_base.den,
|
|
&c->pixel_aspect.num, &c->pixel_aspect.den, sws_param)) < 7) {
|
|
av_log(ctx, AV_LOG_ERROR, "Expected at least 7 arguments, but only %d found in '%s'\n", n, args);
|
|
ret = AVERROR(EINVAL);
|
|
goto fail;
|
|
}
|
|
av_log(ctx, AV_LOG_WARNING, "Flat options syntax is deprecated, use key=value pairs\n");
|
|
|
|
if ((ret = ff_parse_pixel_format(&c->pix_fmt, pix_fmt_str, ctx)) < 0)
|
|
goto fail;
|
|
c->sws_param = av_strdup(sws_param);
|
|
if (!c->sws_param) {
|
|
ret = AVERROR(ENOMEM);
|
|
goto fail;
|
|
}
|
|
}
|
|
|
|
if (!(c->fifo = av_fifo_alloc(sizeof(AVFilterBufferRef*)))) {
|
|
ret = AVERROR(ENOMEM);
|
|
goto fail;
|
|
}
|
|
|
|
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",
|
|
c->w, c->h, av_get_pix_fmt_name(c->pix_fmt),
|
|
c->time_base.num, c->time_base.den, c->frame_rate.num, c->frame_rate.den,
|
|
c->pixel_aspect.num, c->pixel_aspect.den, (char *)av_x_if_null(c->sws_param, ""));
|
|
c->warning_limit = 100;
|
|
return 0;
|
|
|
|
fail:
|
|
av_opt_free(c);
|
|
return ret;
|
|
}
|
|
|
|
#define FLAGS AV_OPT_FLAG_FILTERING_PARAM|AV_OPT_FLAG_AUDIO_PARAM
|
|
static const AVOption abuffer_options[] = {
|
|
{ "time_base", NULL, OFFSET(time_base), AV_OPT_TYPE_RATIONAL, { .dbl = 0 }, 0, INT_MAX, FLAGS },
|
|
{ "sample_rate", NULL, OFFSET(sample_rate), AV_OPT_TYPE_INT, { .i64 = 0 }, 0, INT_MAX, FLAGS },
|
|
{ "sample_fmt", NULL, OFFSET(sample_fmt_str), AV_OPT_TYPE_STRING, .flags = FLAGS },
|
|
{ "channel_layout", NULL, OFFSET(channel_layout_str), AV_OPT_TYPE_STRING, .flags = FLAGS },
|
|
{ NULL },
|
|
};
|
|
|
|
AVFILTER_DEFINE_CLASS(abuffer);
|
|
|
|
static av_cold int init_audio(AVFilterContext *ctx, const char *args)
|
|
{
|
|
BufferSourceContext *s = ctx->priv;
|
|
int ret = 0;
|
|
|
|
s->class = &abuffer_class;
|
|
av_opt_set_defaults(s);
|
|
|
|
if ((ret = av_set_options_string(s, args, "=", ":")) < 0)
|
|
goto fail;
|
|
|
|
s->sample_fmt = av_get_sample_fmt(s->sample_fmt_str);
|
|
if (s->sample_fmt == AV_SAMPLE_FMT_NONE) {
|
|
av_log(ctx, AV_LOG_ERROR, "Invalid sample format '%s'\n",
|
|
s->sample_fmt_str);
|
|
ret = AVERROR(EINVAL);
|
|
goto fail;
|
|
}
|
|
|
|
s->channel_layout = av_get_channel_layout(s->channel_layout_str);
|
|
if (!s->channel_layout) {
|
|
av_log(ctx, AV_LOG_ERROR, "Invalid channel layout '%s'\n",
|
|
s->channel_layout_str);
|
|
ret = AVERROR(EINVAL);
|
|
goto fail;
|
|
}
|
|
|
|
if (!(s->fifo = av_fifo_alloc(sizeof(AVFilterBufferRef*)))) {
|
|
ret = AVERROR(ENOMEM);
|
|
goto fail;
|
|
}
|
|
|
|
if (!s->time_base.num)
|
|
s->time_base = (AVRational){1, s->sample_rate};
|
|
|
|
av_log(ctx, AV_LOG_VERBOSE,
|
|
"tb:%d/%d samplefmt:%s samplerate:%d chlayout:%s\n",
|
|
s->time_base.num, s->time_base.den, s->sample_fmt_str,
|
|
s->sample_rate, s->channel_layout_str);
|
|
s->warning_limit = 100;
|
|
|
|
fail:
|
|
av_opt_free(s);
|
|
return ret;
|
|
}
|
|
|
|
static av_cold void uninit(AVFilterContext *ctx)
|
|
{
|
|
BufferSourceContext *s = ctx->priv;
|
|
while (s->fifo && av_fifo_size(s->fifo)) {
|
|
AVFilterBufferRef *buf;
|
|
av_fifo_generic_read(s->fifo, &buf, sizeof(buf), NULL);
|
|
avfilter_unref_buffer(buf);
|
|
}
|
|
av_fifo_free(s->fifo);
|
|
s->fifo = NULL;
|
|
av_freep(&s->sws_param);
|
|
}
|
|
|
|
static int query_formats(AVFilterContext *ctx)
|
|
{
|
|
BufferSourceContext *c = ctx->priv;
|
|
AVFilterChannelLayouts *channel_layouts = NULL;
|
|
AVFilterFormats *formats = NULL;
|
|
AVFilterFormats *samplerates = NULL;
|
|
|
|
switch (ctx->outputs[0]->type) {
|
|
case AVMEDIA_TYPE_VIDEO:
|
|
ff_add_format(&formats, c->pix_fmt);
|
|
ff_set_common_formats(ctx, formats);
|
|
break;
|
|
case AVMEDIA_TYPE_AUDIO:
|
|
ff_add_format(&formats, c->sample_fmt);
|
|
ff_set_common_formats(ctx, formats);
|
|
|
|
ff_add_format(&samplerates, c->sample_rate);
|
|
ff_set_common_samplerates(ctx, samplerates);
|
|
|
|
ff_add_channel_layout(&channel_layouts, c->channel_layout);
|
|
ff_set_common_channel_layouts(ctx, channel_layouts);
|
|
break;
|
|
default:
|
|
return AVERROR(EINVAL);
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int config_props(AVFilterLink *link)
|
|
{
|
|
BufferSourceContext *c = link->src->priv;
|
|
|
|
switch (link->type) {
|
|
case AVMEDIA_TYPE_VIDEO:
|
|
link->w = c->w;
|
|
link->h = c->h;
|
|
link->sample_aspect_ratio = c->pixel_aspect;
|
|
break;
|
|
case AVMEDIA_TYPE_AUDIO:
|
|
break;
|
|
default:
|
|
return AVERROR(EINVAL);
|
|
}
|
|
|
|
link->time_base = c->time_base;
|
|
link->frame_rate = c->frame_rate;
|
|
return 0;
|
|
}
|
|
|
|
static int request_frame(AVFilterLink *link)
|
|
{
|
|
BufferSourceContext *c = link->src->priv;
|
|
AVFilterBufferRef *buf;
|
|
int ret = 0;
|
|
|
|
if (!av_fifo_size(c->fifo)) {
|
|
if (c->eof)
|
|
return AVERROR_EOF;
|
|
c->nb_failed_requests++;
|
|
return AVERROR(EAGAIN);
|
|
}
|
|
av_fifo_generic_read(c->fifo, &buf, sizeof(buf), NULL);
|
|
|
|
ff_filter_frame(link, buf);
|
|
|
|
return ret;
|
|
}
|
|
|
|
static int poll_frame(AVFilterLink *link)
|
|
{
|
|
BufferSourceContext *c = link->src->priv;
|
|
int size = av_fifo_size(c->fifo);
|
|
if (!size && c->eof)
|
|
return AVERROR_EOF;
|
|
return size/sizeof(AVFilterBufferRef*);
|
|
}
|
|
|
|
static const AVFilterPad avfilter_vsrc_buffer_outputs[] = {
|
|
{
|
|
.name = "default",
|
|
.type = AVMEDIA_TYPE_VIDEO,
|
|
.request_frame = request_frame,
|
|
.poll_frame = poll_frame,
|
|
.config_props = config_props,
|
|
},
|
|
{ NULL }
|
|
};
|
|
|
|
AVFilter avfilter_vsrc_buffer = {
|
|
.name = "buffer",
|
|
.description = NULL_IF_CONFIG_SMALL("Buffer video frames, and make them accessible to the filterchain."),
|
|
.priv_size = sizeof(BufferSourceContext),
|
|
.query_formats = query_formats,
|
|
|
|
.init = init_video,
|
|
.uninit = uninit,
|
|
|
|
.inputs = NULL,
|
|
.outputs = avfilter_vsrc_buffer_outputs,
|
|
.priv_class = &buffer_class,
|
|
};
|
|
|
|
static const AVFilterPad avfilter_asrc_abuffer_outputs[] = {
|
|
{
|
|
.name = "default",
|
|
.type = AVMEDIA_TYPE_AUDIO,
|
|
.request_frame = request_frame,
|
|
.poll_frame = poll_frame,
|
|
.config_props = config_props,
|
|
},
|
|
{ NULL }
|
|
};
|
|
|
|
AVFilter avfilter_asrc_abuffer = {
|
|
.name = "abuffer",
|
|
.description = NULL_IF_CONFIG_SMALL("Buffer audio frames, and make them accessible to the filterchain."),
|
|
.priv_size = sizeof(BufferSourceContext),
|
|
.query_formats = query_formats,
|
|
|
|
.init = init_audio,
|
|
.uninit = uninit,
|
|
|
|
.inputs = NULL,
|
|
.outputs = avfilter_asrc_abuffer_outputs,
|
|
.priv_class = &abuffer_class,
|
|
};
|