/*
* Copyright (C) 2003-2013 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 PCM_CONVERT_HXX
#define PCM_CONVERT_HXX
#include "PcmDither.hxx"
#include "PcmDsd.hxx"
#include "PcmResample.hxx"
#include "PcmBuffer.hxx"
#include <stddef.h>
struct AudioFormat;
class Error;
/**
* This object is statically allocated (within another struct), and
* holds buffer allocations and the state for all kinds of PCM
* conversions.
*/
class PcmConvert {
PcmDsd dsd;
PcmResampler resampler;
PcmDither dither;
/** the buffer for converting the sample format */
PcmBuffer format_buffer;
/** the buffer for converting the channel count */
PcmBuffer channels_buffer;
public:
PcmConvert();
~PcmConvert();
/**
* Reset the pcm_convert_state object. Use this at the
* boundary between two distinct songs and each time the
* format changes.
*/
void Reset();
/**
* Converts PCM data between two audio formats.
*
* @param src_format the source audio format
* @param src the source PCM buffer
* @param src_size the size of #src in bytes
* @param dest_format the requested destination audio format
* @param dest_size_r returns the number of bytes of the destination buffer
* @param error_r location to store the error occurring, or NULL to
* ignore errors
* @return the destination buffer, or NULL on error
*/
const void *Convert(AudioFormat src_format,
const void *src, size_t src_size,
AudioFormat dest_format,
size_t *dest_size_r,
Error &error);
private:
const int16_t *Convert16(AudioFormat src_format,
const void *src_buffer, size_t src_size,
AudioFormat dest_format,
size_t *dest_size_r,
Error &error);
const int32_t *Convert24(AudioFormat src_format,
const void *src_buffer, size_t src_size,
AudioFormat dest_format,
size_t *dest_size_r,
Error &error);
const int32_t *Convert32(AudioFormat src_format,
const void *src_buffer, size_t src_size,
AudioFormat dest_format,
size_t *dest_size_r,
Error &error);
const float *ConvertFloat(AudioFormat src_format,
const void *src_buffer, size_t src_size,
AudioFormat dest_format,
size_t *dest_size_r,
Error &error);
};
extern const class Domain pcm_convert_domain;
#endif
