mirror of
https://github.com/FFmpeg/FFmpeg.git
synced 2024-12-02 03:06:28 +02:00
76 lines
2.3 KiB
C
76 lines
2.3 KiB
C
/*
|
|
* Copyright (c) Stefano Sabatini | stefasab at gmail.com
|
|
* Copyright (c) S.N. Hemanth Meenakshisundaram | smeenaks at ucsd.edu
|
|
*
|
|
* 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
|
|
*/
|
|
|
|
#include "libavutil/avassert.h"
|
|
#include "libavutil/channel_layout.h"
|
|
#include "libavutil/common.h"
|
|
|
|
#include "audio.h"
|
|
#include "avfilter.h"
|
|
#include "internal.h"
|
|
|
|
AVFrame *ff_null_get_audio_buffer(AVFilterLink *link, int nb_samples)
|
|
{
|
|
return ff_get_audio_buffer(link->dst->outputs[0], nb_samples);
|
|
}
|
|
|
|
AVFrame *ff_default_get_audio_buffer(AVFilterLink *link, int nb_samples)
|
|
{
|
|
AVFrame *frame = av_frame_alloc();
|
|
int channels = link->channels;
|
|
int ret;
|
|
|
|
av_assert0(channels == av_get_channel_layout_nb_channels(link->channel_layout) || !av_get_channel_layout_nb_channels(link->channel_layout));
|
|
|
|
if (!frame)
|
|
return NULL;
|
|
|
|
frame->nb_samples = nb_samples;
|
|
frame->format = link->format;
|
|
av_frame_set_channels(frame, link->channels);
|
|
frame->channel_layout = link->channel_layout;
|
|
frame->sample_rate = link->sample_rate;
|
|
ret = av_frame_get_buffer(frame, 0);
|
|
if (ret < 0) {
|
|
av_frame_free(&frame);
|
|
return NULL;
|
|
}
|
|
|
|
av_samples_set_silence(frame->extended_data, 0, nb_samples, channels,
|
|
link->format);
|
|
|
|
|
|
return frame;
|
|
}
|
|
|
|
AVFrame *ff_get_audio_buffer(AVFilterLink *link, int nb_samples)
|
|
{
|
|
AVFrame *ret = NULL;
|
|
|
|
if (link->dstpad->get_audio_buffer)
|
|
ret = link->dstpad->get_audio_buffer(link, nb_samples);
|
|
|
|
if (!ret)
|
|
ret = ff_default_get_audio_buffer(link, nb_samples);
|
|
|
|
return ret;
|
|
}
|