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/*
* 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 }},
};
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