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/*
* Copyright (C) 2003-2011 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_FORMAT_H
#define PCM_FORMAT_H
#include "audio_format.h"
#include <stdint.h>
#include <stddef.h>
struct pcm_buffer;
struct pcm_dither;
/**
* Converts PCM samples to 16 bit. If the source format is 24 bit,
* then dithering is applied.
*
* @param buffer a pcm_buffer object
* @param dither a pcm_dither object for 24-to-16 conversion
* @param bits the number of in the source buffer
* @param src the source PCM buffer
* @param src_size the size of #src in bytes
* @param dest_size_r returns the number of bytes of the destination buffer
* @return the destination buffer
*/
const int16_t *
pcm_convert_to_16(struct pcm_buffer *buffer, struct pcm_dither *dither,
enum sample_format src_format, const void *src,
size_t src_size, size_t *dest_size_r);
/**
* Converts PCM samples to 24 bit (32 bit alignment).
*
* @param buffer a pcm_buffer object
* @param bits the number of in the source buffer
* @param src the source PCM buffer
* @param src_size the size of #src in bytes
* @param dest_size_r returns the number of bytes of the destination buffer
* @return the destination buffer
*/
const int32_t *
pcm_convert_to_24(struct pcm_buffer *buffer,
enum sample_format src_format, const void *src,
size_t src_size, size_t *dest_size_r);
/**
* Converts PCM samples to 32 bit.
*
* @param buffer a pcm_buffer object
* @param bits the number of in the source buffer
* @param src the source PCM buffer
* @param src_size the size of #src in bytes
* @param dest_size_r returns the number of bytes of the destination buffer
* @return the destination buffer
*/
const int32_t *
pcm_convert_to_32(struct pcm_buffer *buffer,
enum sample_format src_format, const void *src,
size_t src_size, size_t *dest_size_r);
/**
* Converts PCM samples to 32 bit floating point.
*
* @param buffer a pcm_buffer object
* @param bits the number of in the source buffer
* @param src the source PCM buffer
* @param src_size the size of #src in bytes
* @param dest_size_r returns the number of bytes of the destination buffer
* @return the destination buffer
*/
const float *
pcm_convert_to_float(struct pcm_buffer *buffer,
enum sample_format src_format, const void *src,
size_t src_size, size_t *dest_size_r);
#endif
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