94 lines
3.0 KiB
C
94 lines
3.0 KiB
C
/*
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* Copyright (C) 2003-2011 The Music Player Daemon Project
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* http://www.musicpd.org
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License along
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* with this program; if not, write to the Free Software Foundation, Inc.,
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* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
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*/
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#ifndef PCM_FORMAT_H
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#define PCM_FORMAT_H
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#include "audio_format.h"
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#include <stdint.h>
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#include <stddef.h>
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struct pcm_buffer;
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struct pcm_dither;
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/**
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* Converts PCM samples to 16 bit. If the source format is 24 bit,
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* then dithering is applied.
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*
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* @param buffer a pcm_buffer object
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* @param dither a pcm_dither object for 24-to-16 conversion
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* @param bits the number of in the source buffer
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* @param src the source PCM buffer
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* @param src_size the size of #src in bytes
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* @param dest_size_r returns the number of bytes of the destination buffer
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* @return the destination buffer
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*/
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const int16_t *
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pcm_convert_to_16(struct pcm_buffer *buffer, struct pcm_dither *dither,
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enum sample_format src_format, const void *src,
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size_t src_size, size_t *dest_size_r);
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/**
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* Converts PCM samples to 24 bit (32 bit alignment).
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*
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* @param buffer a pcm_buffer object
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* @param bits the number of in the source buffer
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* @param src the source PCM buffer
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* @param src_size the size of #src in bytes
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* @param dest_size_r returns the number of bytes of the destination buffer
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* @return the destination buffer
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*/
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const int32_t *
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pcm_convert_to_24(struct pcm_buffer *buffer,
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enum sample_format src_format, const void *src,
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size_t src_size, size_t *dest_size_r);
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/**
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* Converts PCM samples to 32 bit.
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*
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* @param buffer a pcm_buffer object
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* @param bits the number of in the source buffer
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* @param src the source PCM buffer
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* @param src_size the size of #src in bytes
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* @param dest_size_r returns the number of bytes of the destination buffer
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* @return the destination buffer
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*/
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const int32_t *
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pcm_convert_to_32(struct pcm_buffer *buffer,
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enum sample_format src_format, const void *src,
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size_t src_size, size_t *dest_size_r);
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/**
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* Converts PCM samples to 32 bit floating point.
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*
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* @param buffer a pcm_buffer object
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* @param bits the number of in the source buffer
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* @param src the source PCM buffer
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* @param src_size the size of #src in bytes
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* @param dest_size_r returns the number of bytes of the destination buffer
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* @return the destination buffer
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*/
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const float *
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pcm_convert_to_float(struct pcm_buffer *buffer,
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enum sample_format src_format, const void *src,
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size_t src_size, size_t *dest_size_r);
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#endif
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