| 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 | |