1 /* 2 * Copyright 2008-2013 Various Authors 3 * Copyright 2004 Timo Hirvonen 4 * 5 * This program is free software; you can redistribute it and/or 6 * modify it under the terms of the GNU General Public License as 7 * published by the Free Software Foundation; either version 2 of the 8 * License, or (at your option) any later version. 9 * 10 * This program is distributed in the hope that it will be useful, but 11 * WITHOUT ANY WARRANTY; without even the implied warranty of 12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 13 * General Public License for more details. 14 * 15 * You should have received a copy of the GNU General Public License 16 * along with this program; if not, see <http://www.gnu.org/licenses/>. 17 */ 18 19 #ifndef CMUS_SF_H 20 #define CMUS_SF_H 21 22 /* 23 * 0 1 big_endian 0-1 24 * 1 1 is_signed 0-1 25 * 2 1 unused 0 26 * 3-5 3 bits >> 3 0-7 (* 8 = 0-56) 27 * 6-23 18 rate 0-262143 28 * 24-31 8 channels 0-255 29 */ 30 typedef unsigned int sample_format_t; 31 32 #define SF_BIGENDIAN_MASK 0x00000001 33 #define SF_SIGNED_MASK 0x00000002 34 #define SF_BITS_MASK 0x00000038 35 #define SF_RATE_MASK 0x00ffffc0 36 #define SF_CHANNELS_MASK 0xff000000 37 38 #define SF_BIGENDIAN_SHIFT 0 39 #define SF_SIGNED_SHIFT 1 40 #define SF_BITS_SHIFT 0 41 #define SF_RATE_SHIFT 6 42 #define SF_CHANNELS_SHIFT 24 43 44 #define sf_get_bigendian(sf) (((sf) & SF_BIGENDIAN_MASK) >> SF_BIGENDIAN_SHIFT) 45 #define sf_get_signed(sf) (((sf) & SF_SIGNED_MASK ) >> SF_SIGNED_SHIFT) 46 #define sf_get_bits(sf) (((sf) & SF_BITS_MASK ) >> SF_BITS_SHIFT) 47 #define sf_get_rate(sf) (((sf) & SF_RATE_MASK ) >> SF_RATE_SHIFT) 48 #define sf_get_channels(sf) (((sf) & SF_CHANNELS_MASK ) >> SF_CHANNELS_SHIFT) 49 50 #define sf_signed(val) (((val) << SF_SIGNED_SHIFT ) & SF_SIGNED_MASK) 51 #define sf_bits(val) (((val) << SF_BITS_SHIFT ) & SF_BITS_MASK) 52 #define sf_rate(val) (((val) << SF_RATE_SHIFT ) & SF_RATE_MASK) 53 #define sf_channels(val) (((val) << SF_CHANNELS_SHIFT ) & SF_CHANNELS_MASK) 54 #define sf_bigendian(val) (((val) << SF_BIGENDIAN_SHIFT) & SF_BIGENDIAN_MASK) 55 #ifdef WORDS_BIGENDIAN 56 # define sf_host_endian() sf_bigendian(1) 57 #else 58 # define sf_host_endian() sf_bigendian(0) 59 #endif 60 61 #define sf_get_sample_size(sf) (sf_get_bits((sf)) >> 3) 62 #define sf_get_frame_size(sf) (sf_get_sample_size((sf)) * sf_get_channels((sf))) 63 #define sf_get_second_size(sf) (sf_get_rate((sf)) * sf_get_frame_size((sf))) 64 65 #endif 66