Commit a8dcf5ee authored by Mina Nagy Zaki's avatar Mina Nagy Zaki Committed by Stefano Sabatini

lavfi: add asink_abuffer - audio buffer sink

Signed-off-by: 's avatarStefano Sabatini <stefano.sabatini-lala@poste.it>
parent 3e12b589
......@@ -144,6 +144,17 @@ anullsrc=48000:mono
Below is a description of the currently available audio sinks.
@section abuffersink
Buffer audio frames, and make them available to the end of filter chain.
This sink is mainly intended for programmatic use, in particular
through the interface defined in @file{libavfilter/asink_abuffer.h}.
It requires a pointer to a ABufferSinkContext structure, which defines the
incoming buffers' format, to be passed as the opaque parameter to
@code{avfilter_init_filter} for initialization.
@section anullsink
Null audio sink, do absolutely nothing with the input audio. It is
......
......@@ -22,6 +22,7 @@ OBJS-$(CONFIG_ANULL_FILTER) += af_anull.o
OBJS-$(CONFIG_ANULLSRC_FILTER) += asrc_anullsrc.o
OBJS-$(CONFIG_ABUFFERSINK_FILTER) += asink_abuffer.o
OBJS-$(CONFIG_ANULLSINK_FILTER) += asink_anullsink.o
OBJS-$(CONFIG_BLACKFRAME_FILTER) += vf_blackframe.o
......
......@@ -38,6 +38,7 @@ void avfilter_register_all(void)
REGISTER_FILTER (ANULLSRC, anullsrc, asrc);
REGISTER_FILTER (ABUFFERSINK, abuffersink, asink);
REGISTER_FILTER (ANULLSINK, anullsink, asink);
REGISTER_FILTER (BLACKFRAME, blackframe, vf);
......
/*
* Copyright (c) 2011 Stefano Sabatini
* Copyright (c) 2011 Mina Nagy Zaki
*
* 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
* audio buffer sink
*/
#include "avfilter.h"
#include "asink_abuffer.h"
static void filter_samples(AVFilterLink *link, AVFilterBufferRef *samplesref)
{
}
static int init(AVFilterContext *ctx, const char *args, void *opaque)
{
if (!opaque) {
av_log(ctx, AV_LOG_ERROR, "Opaque field required, please pass"
" an initialized ABufferSinkContext");
return AVERROR(EINVAL);
}
memcpy(ctx->priv, opaque, sizeof(ABufferSinkContext));
return 0;
}
static int query_formats(AVFilterContext *ctx)
{
ABufferSinkContext *abuffersink = ctx->priv;
AVFilterFormats *formats;
int ret;
formats = NULL;
if ((ret = avfilter_add_format(&formats, abuffersink->sample_fmt)) < 0)
return ret;
avfilter_set_common_sample_formats(ctx, formats);
formats = NULL;
if ((ret = avfilter_add_format(&formats, abuffersink->channel_layout)) < 0)
return ret;
avfilter_set_common_channel_layouts(ctx, formats);
formats = NULL;
if ((ret = avfilter_add_format(&formats, abuffersink->planar)) < 0)
return ret;
avfilter_set_common_packing_formats(ctx, formats);
return 0;
}
int av_asink_abuffer_get_audio_buffer_ref(AVFilterContext *abuffersink,
AVFilterBufferRef **samplesref,
int av_unused flags)
{
int ret;
AVFilterLink * const inlink = abuffersink->inputs[0];
if ((ret = avfilter_request_frame(inlink)))
return ret;
if (!inlink->cur_buf)
return AVERROR(EINVAL);
*samplesref = inlink->cur_buf;
inlink->cur_buf = NULL;
return 0;
}
AVFilter avfilter_asink_abuffersink = {
.name = "abuffersink",
.description = NULL_IF_CONFIG_SMALL("Buffer audio frames, and make them available to the end of the filter graph."),
.init = init,
.priv_size = sizeof(ABufferSinkContext),
.query_formats = query_formats,
.inputs = (AVFilterPad[]) {{ .name = "default",
.type = AVMEDIA_TYPE_AUDIO,
.filter_samples = filter_samples,
.min_perms = AV_PERM_READ, },
{ .name = NULL }},
.outputs = (AVFilterPad[]) {{ .name = NULL }},
};
/*
* 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
*/
#ifndef AVFILTER_ASINK_ABUFFER_H
#define AVFILTER_ASINK_ABUFFER_H
/**
* @file
* audio buffer sink API
*/
#include "avfilter.h"
typedef struct {
enum AVSampleFormat sample_fmt;
int64_t channel_layout;
int planar;
} ABufferSinkContext;
/**
* Get an audio buffer from abuffersink and put it in samplesref.
*
* @param abuffersink pointer to an abuffersink context
* @param flags unused
* @return >= 0 in case of success, a negative AVERROR code in case of failure
*/
int av_asink_abuffer_get_audio_buffer_ref(AVFilterContext *abuffersink,
AVFilterBufferRef **samplesref,
int av_unused flags);
#endif /* AVFILTER_ASINK_ABUFFER_H */
......@@ -29,8 +29,8 @@
#include "libavutil/rational.h"
#define LIBAVFILTER_VERSION_MAJOR 2
#define LIBAVFILTER_VERSION_MINOR 27
#define LIBAVFILTER_VERSION_MICRO 5
#define LIBAVFILTER_VERSION_MINOR 28
#define LIBAVFILTER_VERSION_MICRO 0
#define LIBAVFILTER_VERSION_INT AV_VERSION_INT(LIBAVFILTER_VERSION_MAJOR, \
LIBAVFILTER_VERSION_MINOR, \
......
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