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/*
* Copyright 2003-2020 The Music Player Daemon Project
* http://www.musicpd.org
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program 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 General Public License for more details.
*
* You should have received a copy of the GNU General Public License along
* with this program; if not, write to the Free Software Foundation, Inc.,
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*/
#ifndef MPD_FFMPEG_FILTER__HXX
#define MPD_FFMPEG_FILTER__HXX
#include "filter/Filter.hxx"
#include "lib/ffmpeg/Buffer.hxx"
#include "lib/ffmpeg/Filter.hxx"
#include "lib/ffmpeg/Frame.hxx"
/**
* A #Filter implementation using FFmpeg's libavfilter.
*/
class FfmpegFilter final : public Filter {
Ffmpeg::FilterGraph graph;
Ffmpeg::FilterContext buffer_src, buffer_sink;
Ffmpeg::Frame frame;
FfmpegBuffer interleave_buffer;
const int in_format, in_sample_rate, in_channels;
const size_t in_audio_frame_size;
const size_t out_audio_frame_size;
public:
/**
* @param _graph a checked and configured AVFilterGraph
* @param _buffer_src an "abuffer" filter which serves as
* input
* @param _buffer_sink an "abuffersink" filter which serves as
* output
*/
FfmpegFilter(const AudioFormat &in_audio_format,
const AudioFormat &_out_audio_format,
Ffmpeg::FilterGraph &&_graph,
Ffmpeg::FilterContext &&_buffer_src,
Ffmpeg::FilterContext &&_buffer_sink) noexcept;
/* virtual methods from class Filter */
ConstBuffer<void> FilterPCM(ConstBuffer<void> src) override;
};
#endif
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