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      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 (at) 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