1/* $NetBSD$ */ 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 */ 32struct 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