1 /* $NetBSD: ceareg.h,v 1.1 2015/03/28 14:09:59 jmcneill Exp $ */ 2 3 /* 4 * Copyright (c) 2011 Jared D. McNeill <jmcneill@invisible.ca> 5 * All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 2. The name of the author may not be used to endorse or promote products 13 * derived from this software without specific prior written permission. 14 * 15 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 16 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 17 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 18 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 19 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, 20 * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; 21 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED 22 * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, 23 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 24 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 25 * SUCH DAMAGE. 26 */ 27 28 #ifndef _CEAREG_H 29 #define _CEAREG_H 30 31 /* short audio descriptor */ 32 struct cea_sad { 33 uint8_t flags1; 34 uint8_t sample_rates; 35 uint8_t flags2; 36 } __packed; 37 38 #define CEA_AUDIO_FORMAT(desc) (((desc)->flags1 >> 3) & 0x0f) 39 #define CEA_AUDIO_FORMAT_LPCM 1 40 #define CEA_AUDIO_FORMAT_AC3 2 41 #define CEA_AUDIO_FORMAT_MPEG1_L12 3 42 #define CEA_AUDIO_FORMAT_MPEG1_L3 4 43 #define CEA_AUDIO_FORMAT_MPEG2 5 44 #define CEA_AUDIO_FORMAT_AAC 6 45 #define CEA_AUDIO_FORMAT_DTS 7 46 #define CEA_AUDIO_FORMAT_ATRAC 8 47 #define CEA_MAX_CHANNELS(desc) ((((desc)->flags1 >> 0) & 0x07) + 1) 48 #define CEA_SAMPLE_RATE(desc) ((desc)->sample_rates) 49 #define CEA_SAMPLE_RATE_192K 0x40 50 #define CEA_SAMPLE_RATE_176K 0x20 51 #define CEA_SAMPLE_RATE_96K 0x10 52 #define CEA_SAMPLE_RATE_88K 0x08 53 #define CEA_SAMPLE_RATE_48K 0x04 54 #define CEA_SAMPLE_RATE_44K 0x02 55 #define CEA_SAMPLE_RATE_32K 0x01 56 /* uncompressed */ 57 #define CEA_PRECISION(desc) ((desc)->flags2 & 0x07) 58 #define CEA_PRECISION_24BIT 0x4 59 #define CEA_PRECISION_20BIT 0x2 60 #define CEA_PRECISION_16BIT 0x1 61 /* compressed */ 62 #define CEA_MAX_BITRATE(desc) ((uint32_t)(desc)->flags2 * 8000) 63 64 #endif /* !_CEAREG_H */ 65