53 lines
1.4 KiB
C++
53 lines
1.4 KiB
C++
/*
|
|
* Copyright 2003-2019 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_PCM_DOP_HXX
|
|
#define MPD_PCM_DOP_HXX
|
|
|
|
#include "Buffer.hxx"
|
|
#include "RestBuffer.hxx"
|
|
|
|
#include <stdint.h>
|
|
|
|
template<typename T> struct ConstBuffer;
|
|
|
|
/**
|
|
* Pack DSD 1 bit samples into (padded) 24 bit PCM samples for
|
|
* playback over USB, according to the DoP standard:
|
|
* http://dsd-guide.com/dop-open-standard
|
|
*/
|
|
class DsdToDopConverter {
|
|
unsigned channels;
|
|
|
|
PcmBuffer buffer;
|
|
|
|
PcmRestBuffer<uint8_t, 4> rest_buffer;
|
|
|
|
public:
|
|
void Open(unsigned _channels) noexcept;
|
|
|
|
void Reset() noexcept {
|
|
rest_buffer.Reset();
|
|
}
|
|
|
|
ConstBuffer<uint32_t> Convert(ConstBuffer<uint8_t> src) noexcept;
|
|
};
|
|
|
|
#endif
|