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