1 /* 2 * Copyright 2003-2021 The Music Player Daemon Project 3 * http://www.musicpd.org 4 * 5 * This program is free software; you can redistribute it and/or modify 6 * it under the terms of the GNU General Public License as published by 7 * the Free Software Foundation; either version 2 of the License, or 8 * (at your option) any later version. 9 * 10 * This program is distributed in the hope that it will be useful, 11 * but WITHOUT ANY WARRANTY; without even the implied warranty of 12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 13 * GNU General Public License for more details. 14 * 15 * You should have received a copy of the GNU General Public License along 16 * with this program; if not, write to the Free Software Foundation, Inc., 17 * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. 18 */ 19 20 /** \file 21 * 22 * Library for working with packed 24 bit samples. 23 */ 24 25 #ifndef PCM_PACK_HXX 26 #define PCM_PACK_HXX 27 28 #include <cstdint> 29 30 /** 31 * Converts padded 24 bit samples (4 bytes per sample) to packed 24 32 * bit samples (3 bytes per sample). 33 * 34 * This function can be used to convert a buffer in-place. 35 * 36 * @param dest the destination buffer (array of triples) 37 * @param src the source buffer 38 */ 39 void 40 pcm_pack_24(uint8_t *dest, 41 const int32_t *src, const int32_t *src_end) noexcept; 42 43 /** 44 * Converts packed 24 bit samples (3 bytes per sample) to padded 24 45 * bit samples (4 bytes per sample). 46 * 47 * @param dest the destination buffer 48 * @param src the source buffer (array of triples) 49 */ 50 void 51 pcm_unpack_24(int32_t *dest, 52 const uint8_t *src, const uint8_t *src_end) noexcept; 53 54 /** 55 * Like pcm_unpack_24(), but assume the source byte order is 56 * big-endian. The destination byte order ia always native. 57 */ 58 void 59 pcm_unpack_24be(int32_t *dest, 60 const uint8_t *src, const uint8_t *src_end) noexcept; 61 62 #endif 63