/*
* 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"
extern "C" {
#include "pcm_resample.h"
#include "pcm_buffer.h"
}
#include <glib.h>
struct audio_format;
/**
* 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;
struct pcm_resample_state resample;
PcmDither dither;
/** the buffer for converting the sample format */
struct pcm_buffer format_buffer;
/** the buffer for converting the channel count */
struct pcm_buffer 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(const audio_format *src_format,
const void *src, size_t src_size,
const audio_format *dest_format,
size_t *dest_size_r,
GError **error_r);
private:
const int16_t *Convert16(const audio_format *src_format,
const void *src_buffer, size_t src_size,
const audio_format *dest_format,
size_t *dest_size_r,
GError **error_r);
const int32_t *Convert24(const audio_format *src_format,
const void *src_buffer, size_t src_size,
const audio_format *dest_format,
size_t *dest_size_r,
GError **error_r);
const int32_t *Convert32(const audio_format *src_format,
const void *src_buffer, size_t src_size,
const audio_format *dest_format,
size_t *dest_size_r,
GError **error_r);
const float *ConvertFloat(const audio_format *src_format,
const void *src_buffer, size_t src_size,
const audio_format *dest_format,
size_t *dest_size_r,
GError **error_r);
};
static inline GQuark
pcm_convert_quark(void)
{
return g_quark_from_static_string("pcm_convert");
}
#endif
