/* * Copyright (C) 2003-2009 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 <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, uint8_t bits, 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, uint8_t bits, 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, uint8_t bits, const void *src, size_t src_size, size_t *dest_size_r); #endif