code.delx.au - pulseaudio/blob - src/modules/bluetooth/a2dp-codecs.h

   1 /*
   2  *
   3  *  BlueZ - Bluetooth protocol stack for Linux
   4  *
   5  *  Copyright (C) 2006-2010  Nokia Corporation
   6  *  Copyright (C) 2004-2010  Marcel Holtmann <marcel@holtmann.org>
   7  *
   8  *
   9  *  This program is free software; you can redistribute it and/or modify
  10  *  it under the terms of the GNU General Public License as published by
  11  *  the Free Software Foundation; either version 2 of the License, or
  12  *  (at your option) any later version.
  13  *
  14  *  This program is distributed in the hope that it will be useful,
  15  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
  16  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  17  *  GNU General Public License for more details.
  18  *
  19  *  You should have received a copy of the GNU General Public License
  20  *  along with this program; if not, write to the Free Software
  21  *  Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
  22  *
  23  */
  24
  25 #define A2DP_CODEC_SBC                  0x00
  26 #define A2DP_CODEC_MPEG12               0x01
  27 #define A2DP_CODEC_MPEG24               0x02
  28 #define A2DP_CODEC_ATRAC                0x03
  29
  30 #define SBC_SAMPLING_FREQ_16000         (1 << 3)
  31 #define SBC_SAMPLING_FREQ_32000         (1 << 2)
  32 #define SBC_SAMPLING_FREQ_44100         (1 << 1)
  33 #define SBC_SAMPLING_FREQ_48000         1
  34
  35 #define SBC_CHANNEL_MODE_MONO           (1 << 3)
  36 #define SBC_CHANNEL_MODE_DUAL_CHANNEL   (1 << 2)
  37 #define SBC_CHANNEL_MODE_STEREO         (1 << 1)
  38 #define SBC_CHANNEL_MODE_JOINT_STEREO   1
  39
  40 #define SBC_BLOCK_LENGTH_4              (1 << 3)
  41 #define SBC_BLOCK_LENGTH_8              (1 << 2)
  42 #define SBC_BLOCK_LENGTH_12             (1 << 1)
  43 #define SBC_BLOCK_LENGTH_16             1
  44
  45 #define SBC_SUBBANDS_4                  (1 << 1)
  46 #define SBC_SUBBANDS_8                  1
  47
  48 #define SBC_ALLOCATION_SNR              (1 << 1)
  49 #define SBC_ALLOCATION_LOUDNESS         1
  50
  51 #define MPEG_CHANNEL_MODE_MONO          (1 << 3)
  52 #define MPEG_CHANNEL_MODE_DUAL_CHANNEL  (1 << 2)
  53 #define MPEG_CHANNEL_MODE_STEREO        (1 << 1)
  54 #define MPEG_CHANNEL_MODE_JOINT_STEREO  1
  55
  56 #define MPEG_LAYER_MP1                  (1 << 2)
  57 #define MPEG_LAYER_MP2                  (1 << 1)
  58 #define MPEG_LAYER_MP3                  1
  59
  60 #define MPEG_SAMPLING_FREQ_16000        (1 << 5)
  61 #define MPEG_SAMPLING_FREQ_22050        (1 << 4)
  62 #define MPEG_SAMPLING_FREQ_24000        (1 << 3)
  63 #define MPEG_SAMPLING_FREQ_32000        (1 << 2)
  64 #define MPEG_SAMPLING_FREQ_44100        (1 << 1)
  65 #define MPEG_SAMPLING_FREQ_48000        1
  66
  67 #define MAX_BITPOOL 64
  68 #define MIN_BITPOOL 2
  69
  70 #if __BYTE_ORDER == __LITTLE_ENDIAN
  71
  72 typedef struct {
  73         uint8_t channel_mode:4;
  74         uint8_t frequency:4;
  75         uint8_t allocation_method:2;
  76         uint8_t subbands:2;
  77         uint8_t block_length:4;
  78         uint8_t min_bitpool;
  79         uint8_t max_bitpool;
  80 } __attribute__ ((packed)) a2dp_sbc_t;
  81
  82 typedef struct {
  83         uint8_t channel_mode:4;
  84         uint8_t crc:1;
  85         uint8_t layer:3;
  86         uint8_t frequency:6;
  87         uint8_t mpf:1;
  88         uint8_t rfa:1;
  89         uint16_t bitrate;
  90 } __attribute__ ((packed)) a2dp_mpeg_t;
  91
  92 #elif __BYTE_ORDER == __BIG_ENDIAN
  93
  94 typedef struct {
  95         uint8_t frequency:4;
  96         uint8_t channel_mode:4;
  97         uint8_t block_length:4;
  98         uint8_t subbands:2;
  99         uint8_t allocation_method:2;
 100         uint8_t min_bitpool;
 101         uint8_t max_bitpool;
 102 } __attribute__ ((packed)) a2dp_sbc_t;
 103
 104 typedef struct {
 105         uint8_t layer:3;
 106         uint8_t crc:1;
 107         uint8_t channel_mode:4;
 108         uint8_t rfa:1;
 109         uint8_t mpf:1;
 110         uint8_t frequency:6;
 111         uint16_t bitrate;
 112 } __attribute__ ((packed)) a2dp_mpeg_t;
 113
 114 #else
 115 #error "Unknown byte order"
 116 #endif