profiles/audio/a2dp-codecs.h - vendor/opensource/bluez - Git at Google

 /*
  *
  *  BlueZ - Bluetooth protocol stack for Linux
  *
  *  Copyright (C) 2006-2010  Nokia Corporation
  *  Copyright (C) 2004-2010  Marcel Holtmann <marcel@holtmann.org>
  *
  *
  *  This library is free software; you can redistribute it and/or
  *  modify it under the terms of the GNU Lesser General Public
  *  License as published by the Free Software Foundation; either
  *  version 2.1 of the License, or (at your option) any later version.
  *
  *  This library is distributed in the hope that it will be useful,
  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  *  Lesser General Public License for more details.
  *
  *  You should have received a copy of the GNU Lesser General Public
  *  License along with this library; if not, write to the Free Software
  *  Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
  *
  */

 #define A2DP_CODEC_SBC			0x00
 #define A2DP_CODEC_MPEG12		0x01
 #define A2DP_CODEC_MPEG24		0x02
 #define A2DP_CODEC_ATRAC		0x03
 #define A2DP_CODEC_VENDOR		0xFF

 #define SBC_SAMPLING_FREQ_16000		(1 << 3)
 #define SBC_SAMPLING_FREQ_32000		(1 << 2)
 #define SBC_SAMPLING_FREQ_44100		(1 << 1)
 #define SBC_SAMPLING_FREQ_48000		1

 #define SBC_CHANNEL_MODE_MONO		(1 << 3)
 #define SBC_CHANNEL_MODE_DUAL_CHANNEL	(1 << 2)
 #define SBC_CHANNEL_MODE_STEREO		(1 << 1)
 #define SBC_CHANNEL_MODE_JOINT_STEREO	1

 #define SBC_BLOCK_LENGTH_4		(1 << 3)
 #define SBC_BLOCK_LENGTH_8		(1 << 2)
 #define SBC_BLOCK_LENGTH_12		(1 << 1)
 #define SBC_BLOCK_LENGTH_16		1

 #define SBC_SUBBANDS_4			(1 << 1)
 #define SBC_SUBBANDS_8			1

 #define SBC_ALLOCATION_SNR		(1 << 1)
 #define SBC_ALLOCATION_LOUDNESS		1

 #define MAX_BITPOOL 64
 #define MIN_BITPOOL 2

 #define MPEG_CHANNEL_MODE_MONO		(1 << 3)
 #define MPEG_CHANNEL_MODE_DUAL_CHANNEL	(1 << 2)
 #define MPEG_CHANNEL_MODE_STEREO	(1 << 1)
 #define MPEG_CHANNEL_MODE_JOINT_STEREO	1

 #define MPEG_LAYER_MP1			(1 << 2)
 #define MPEG_LAYER_MP2			(1 << 1)
 #define MPEG_LAYER_MP3			1

 #define MPEG_SAMPLING_FREQ_16000	(1 << 5)
 #define MPEG_SAMPLING_FREQ_22050	(1 << 4)
 #define MPEG_SAMPLING_FREQ_24000	(1 << 3)
 #define MPEG_SAMPLING_FREQ_32000	(1 << 2)
 #define MPEG_SAMPLING_FREQ_44100	(1 << 1)
 #define MPEG_SAMPLING_FREQ_48000	1

 #define MPEG_BIT_RATE_VBR		0x8000
 #define MPEG_BIT_RATE_320000		0x4000
 #define MPEG_BIT_RATE_256000		0x2000
 #define MPEG_BIT_RATE_224000		0x1000
 #define MPEG_BIT_RATE_192000		0x0800
 #define MPEG_BIT_RATE_160000		0x0400
 #define MPEG_BIT_RATE_128000		0x0200
 #define MPEG_BIT_RATE_112000		0x0100
 #define MPEG_BIT_RATE_96000		0x0080
 #define MPEG_BIT_RATE_80000		0x0040
 #define MPEG_BIT_RATE_64000		0x0020
 #define MPEG_BIT_RATE_56000		0x0010
 #define MPEG_BIT_RATE_48000		0x0008
 #define MPEG_BIT_RATE_40000		0x0004
 #define MPEG_BIT_RATE_32000		0x0002
 #define MPEG_BIT_RATE_FREE		0x0001

 #define AAC_OBJECT_TYPE_MPEG2_AAC_LC	0x80
 #define AAC_OBJECT_TYPE_MPEG4_AAC_LC	0x40
 #define AAC_OBJECT_TYPE_MPEG4_AAC_LTP	0x20
 #define AAC_OBJECT_TYPE_MPEG4_AAC_SCA	0x10

 #define AAC_SAMPLING_FREQ_8000		0x0800
 #define AAC_SAMPLING_FREQ_11025		0x0400
 #define AAC_SAMPLING_FREQ_12000		0x0200
 #define AAC_SAMPLING_FREQ_16000		0x0100
 #define AAC_SAMPLING_FREQ_22050		0x0080
 #define AAC_SAMPLING_FREQ_24000		0x0040
 #define AAC_SAMPLING_FREQ_32000		0x0020
 #define AAC_SAMPLING_FREQ_44100		0x0010
 #define AAC_SAMPLING_FREQ_48000		0x0008
 #define AAC_SAMPLING_FREQ_64000		0x0004
 #define AAC_SAMPLING_FREQ_88200		0x0002
 #define AAC_SAMPLING_FREQ_96000		0x0001

 #define AAC_CHANNELS_1			0x02
 #define AAC_CHANNELS_2			0x01

 #define AAC_GET_BITRATE(a) ((a).bitrate1 << 16 | \
 					(a).bitrate2 << 8 | (a).bitrate3)
 #define AAC_GET_FREQUENCY(a) ((a).frequency1 << 4 | (a).frequency2)

 #define AAC_SET_BITRATE(a, b) \
 	do { \
 		(a).bitrate1 = (b >> 16) & 0x7f; \
 		(a).bitrate2 = (b >> 8) & 0xff; \
 		(a).bitrate3 = b & 0xff; \
 	} while (0)
 #define AAC_SET_FREQUENCY(a, f) \
 	do { \
 		(a).frequency1 = (f >> 4) & 0xff; \
 		(a).frequency2 = f & 0x0f; \
 	} while (0)

 #define AAC_INIT_BITRATE(b) \
 	.bitrate1 = (b >> 16) & 0x7f, \
 	.bitrate2 = (b >> 8) & 0xff, \
 	.bitrate3 = b & 0xff,
 #define AAC_INIT_FREQUENCY(f) \
 	.frequency1 = (f >> 4) & 0xff, \
 	.frequency2 = f & 0x0f,

 #define APTX_VENDOR_ID			0x0000004f
 #define APTX_CODEC_ID			0x0001

 #define APTX_CHANNEL_MODE_MONO		0x01
 #define APTX_CHANNEL_MODE_STEREO	0x02

 #define APTX_SAMPLING_FREQ_16000	0x08
 #define APTX_SAMPLING_FREQ_32000	0x04
 #define APTX_SAMPLING_FREQ_44100	0x02
 #define APTX_SAMPLING_FREQ_48000	0x01

 #define LDAC_VENDOR_ID			0x0000012d
 #define LDAC_CODEC_ID			0x00aa

 typedef struct {
 	uint32_t vendor_id;
 	uint16_t codec_id;
 } __attribute__ ((packed)) a2dp_vendor_codec_t;

 #if __BYTE_ORDER == __LITTLE_ENDIAN

 typedef struct {
 	uint8_t channel_mode:4;
 	uint8_t frequency:4;
 	uint8_t allocation_method:2;
 	uint8_t subbands:2;
 	uint8_t block_length:4;
 	uint8_t min_bitpool;
 	uint8_t max_bitpool;
 } __attribute__ ((packed)) a2dp_sbc_t;

 typedef struct {
 	uint8_t channel_mode:4;
 	uint8_t crc:1;
 	uint8_t layer:3;
 	uint8_t frequency:6;
 	uint8_t mpf:1;
 	uint8_t rfa:1;
 	uint16_t bitrate;
 } __attribute__ ((packed)) a2dp_mpeg_t;

 typedef struct {
 	uint8_t object_type;
 	uint8_t frequency1;
 	uint8_t rfa:2;
 	uint8_t channels:2;
 	uint8_t frequency2:4;
 	uint8_t bitrate1:7;
 	uint8_t vbr:1;
 	uint8_t bitrate2;
 	uint8_t bitrate3;
 } __attribute__ ((packed)) a2dp_aac_t;

 typedef struct {
 	a2dp_vendor_codec_t info;
 	uint8_t channel_mode:4;
 	uint8_t frequency:4;
 } __attribute__ ((packed)) a2dp_aptx_t;

 typedef struct {
 	a2dp_vendor_codec_t info;
 	uint8_t unknown[2];
 } __attribute__ ((packed)) a2dp_ldac_t;

 #elif __BYTE_ORDER == __BIG_ENDIAN

 typedef struct {
 	uint8_t frequency:4;
 	uint8_t channel_mode:4;
 	uint8_t block_length:4;
 	uint8_t subbands:2;
 	uint8_t allocation_method:2;
 	uint8_t min_bitpool;
 	uint8_t max_bitpool;
 } __attribute__ ((packed)) a2dp_sbc_t;

 typedef struct {
 	uint8_t layer:3;
 	uint8_t crc:1;
 	uint8_t channel_mode:4;
 	uint8_t rfa:1;
 	uint8_t mpf:1;
 	uint8_t frequency:6;
 	uint16_t bitrate;
 } __attribute__ ((packed)) a2dp_mpeg_t;

 typedef struct {
 	uint8_t object_type;
 	uint8_t frequency1;
 	uint8_t frequency2:4;
 	uint8_t channels:2;
 	uint8_t rfa:2;
 	uint8_t vbr:1;
 	uint8_t bitrate1:7;
 	uint8_t bitrate2;
 	uint8_t bitrate3;
 } __attribute__ ((packed)) a2dp_aac_t;

 typedef struct {
 	a2dp_vendor_codec_t info;
 	uint8_t frequency:4;
 	uint8_t channel_mode:4;
 } __attribute__ ((packed)) a2dp_aptx_t;

 typedef struct {
 	a2dp_vendor_codec_t info;
 	uint8_t unknown[2];
 } __attribute__ ((packed)) a2dp_ldac_t;

 #else
 #error "Unknown byte order"
 #endif
	/*
	*
	* BlueZ - Bluetooth protocol stack for Linux
	*
	* Copyright (C) 2006-2010 Nokia Corporation
	* Copyright (C) 2004-2010 Marcel Holtmann <marcel@holtmann.org>
	*
	*
	* This library is free software; you can redistribute it and/or
	* modify it under the terms of the GNU Lesser General Public
	* License as published by the Free Software Foundation; either
	* version 2.1 of the License, or (at your option) any later version.
	*
	* This library is distributed in the hope that it will be useful,
	* but WITHOUT ANY WARRANTY; without even the implied warranty of
	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
	* Lesser General Public License for more details.
	*
	* You should have received a copy of the GNU Lesser General Public
	* License along with this library; if not, write to the Free Software
	* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
	*
	*/

	#define A2DP_CODEC_SBC 0x00
	#define A2DP_CODEC_MPEG12 0x01
	#define A2DP_CODEC_MPEG24 0x02
	#define A2DP_CODEC_ATRAC 0x03
	#define A2DP_CODEC_VENDOR 0xFF

	#define SBC_SAMPLING_FREQ_16000 (1 << 3)
	#define SBC_SAMPLING_FREQ_32000 (1 << 2)
	#define SBC_SAMPLING_FREQ_44100 (1 << 1)
	#define SBC_SAMPLING_FREQ_48000 1

	#define SBC_CHANNEL_MODE_MONO (1 << 3)
	#define SBC_CHANNEL_MODE_DUAL_CHANNEL (1 << 2)
	#define SBC_CHANNEL_MODE_STEREO (1 << 1)
	#define SBC_CHANNEL_MODE_JOINT_STEREO 1

	#define SBC_BLOCK_LENGTH_4 (1 << 3)
	#define SBC_BLOCK_LENGTH_8 (1 << 2)
	#define SBC_BLOCK_LENGTH_12 (1 << 1)
	#define SBC_BLOCK_LENGTH_16 1

	#define SBC_SUBBANDS_4 (1 << 1)
	#define SBC_SUBBANDS_8 1

	#define SBC_ALLOCATION_SNR (1 << 1)
	#define SBC_ALLOCATION_LOUDNESS 1

	#define MAX_BITPOOL 64
	#define MIN_BITPOOL 2

	#define MPEG_CHANNEL_MODE_MONO (1 << 3)
	#define MPEG_CHANNEL_MODE_DUAL_CHANNEL (1 << 2)
	#define MPEG_CHANNEL_MODE_STEREO (1 << 1)
	#define MPEG_CHANNEL_MODE_JOINT_STEREO 1

	#define MPEG_LAYER_MP1 (1 << 2)
	#define MPEG_LAYER_MP2 (1 << 1)
	#define MPEG_LAYER_MP3 1

	#define MPEG_SAMPLING_FREQ_16000 (1 << 5)
	#define MPEG_SAMPLING_FREQ_22050 (1 << 4)
	#define MPEG_SAMPLING_FREQ_24000 (1 << 3)
	#define MPEG_SAMPLING_FREQ_32000 (1 << 2)
	#define MPEG_SAMPLING_FREQ_44100 (1 << 1)
	#define MPEG_SAMPLING_FREQ_48000 1

	#define MPEG_BIT_RATE_VBR 0x8000
	#define MPEG_BIT_RATE_320000 0x4000
	#define MPEG_BIT_RATE_256000 0x2000
	#define MPEG_BIT_RATE_224000 0x1000
	#define MPEG_BIT_RATE_192000 0x0800
	#define MPEG_BIT_RATE_160000 0x0400
	#define MPEG_BIT_RATE_128000 0x0200
	#define MPEG_BIT_RATE_112000 0x0100
	#define MPEG_BIT_RATE_96000 0x0080
	#define MPEG_BIT_RATE_80000 0x0040
	#define MPEG_BIT_RATE_64000 0x0020
	#define MPEG_BIT_RATE_56000 0x0010
	#define MPEG_BIT_RATE_48000 0x0008
	#define MPEG_BIT_RATE_40000 0x0004
	#define MPEG_BIT_RATE_32000 0x0002
	#define MPEG_BIT_RATE_FREE 0x0001

	#define AAC_OBJECT_TYPE_MPEG2_AAC_LC 0x80
	#define AAC_OBJECT_TYPE_MPEG4_AAC_LC 0x40
	#define AAC_OBJECT_TYPE_MPEG4_AAC_LTP 0x20
	#define AAC_OBJECT_TYPE_MPEG4_AAC_SCA 0x10

	#define AAC_SAMPLING_FREQ_8000 0x0800
	#define AAC_SAMPLING_FREQ_11025 0x0400
	#define AAC_SAMPLING_FREQ_12000 0x0200
	#define AAC_SAMPLING_FREQ_16000 0x0100
	#define AAC_SAMPLING_FREQ_22050 0x0080
	#define AAC_SAMPLING_FREQ_24000 0x0040
	#define AAC_SAMPLING_FREQ_32000 0x0020
	#define AAC_SAMPLING_FREQ_44100 0x0010
	#define AAC_SAMPLING_FREQ_48000 0x0008
	#define AAC_SAMPLING_FREQ_64000 0x0004
	#define AAC_SAMPLING_FREQ_88200 0x0002
	#define AAC_SAMPLING_FREQ_96000 0x0001

	#define AAC_CHANNELS_1 0x02
	#define AAC_CHANNELS_2 0x01

	#define AAC_GET_BITRATE(a) ((a).bitrate1 << 16 \| \
	(a).bitrate2 << 8 \| (a).bitrate3)
	#define AAC_GET_FREQUENCY(a) ((a).frequency1 << 4 \| (a).frequency2)

	#define AAC_SET_BITRATE(a, b) \
	do { \
	(a).bitrate1 = (b >> 16) & 0x7f; \
	(a).bitrate2 = (b >> 8) & 0xff; \
	(a).bitrate3 = b & 0xff; \
	} while (0)
	#define AAC_SET_FREQUENCY(a, f) \
	do { \
	(a).frequency1 = (f >> 4) & 0xff; \
	(a).frequency2 = f & 0x0f; \
	} while (0)

	#define AAC_INIT_BITRATE(b) \
	.bitrate1 = (b >> 16) & 0x7f, \
	.bitrate2 = (b >> 8) & 0xff, \
	.bitrate3 = b & 0xff,
	#define AAC_INIT_FREQUENCY(f) \
	.frequency1 = (f >> 4) & 0xff, \
	.frequency2 = f & 0x0f,

	#define APTX_VENDOR_ID 0x0000004f
	#define APTX_CODEC_ID 0x0001

	#define APTX_CHANNEL_MODE_MONO 0x01
	#define APTX_CHANNEL_MODE_STEREO 0x02

	#define APTX_SAMPLING_FREQ_16000 0x08
	#define APTX_SAMPLING_FREQ_32000 0x04
	#define APTX_SAMPLING_FREQ_44100 0x02
	#define APTX_SAMPLING_FREQ_48000 0x01

	#define LDAC_VENDOR_ID 0x0000012d
	#define LDAC_CODEC_ID 0x00aa

	typedef struct {
	uint32_t vendor_id;
	uint16_t codec_id;
	} __attribute__ ((packed)) a2dp_vendor_codec_t;

	#if __BYTE_ORDER == __LITTLE_ENDIAN

	typedef struct {
	uint8_t channel_mode:4;
	uint8_t frequency:4;
	uint8_t allocation_method:2;
	uint8_t subbands:2;
	uint8_t block_length:4;
	uint8_t min_bitpool;
	uint8_t max_bitpool;
	} __attribute__ ((packed)) a2dp_sbc_t;

	typedef struct {
	uint8_t channel_mode:4;
	uint8_t crc:1;
	uint8_t layer:3;
	uint8_t frequency:6;
	uint8_t mpf:1;
	uint8_t rfa:1;
	uint16_t bitrate;
	} __attribute__ ((packed)) a2dp_mpeg_t;

	typedef struct {
	uint8_t object_type;
	uint8_t frequency1;
	uint8_t rfa:2;
	uint8_t channels:2;
	uint8_t frequency2:4;
	uint8_t bitrate1:7;
	uint8_t vbr:1;
	uint8_t bitrate2;
	uint8_t bitrate3;
	} __attribute__ ((packed)) a2dp_aac_t;

	typedef struct {
	a2dp_vendor_codec_t info;
	uint8_t channel_mode:4;
	uint8_t frequency:4;
	} __attribute__ ((packed)) a2dp_aptx_t;

	typedef struct {
	a2dp_vendor_codec_t info;
	uint8_t unknown[2];
	} __attribute__ ((packed)) a2dp_ldac_t;

	#elif __BYTE_ORDER == __BIG_ENDIAN

	typedef struct {
	uint8_t frequency:4;
	uint8_t channel_mode:4;
	uint8_t block_length:4;
	uint8_t subbands:2;
	uint8_t allocation_method:2;
	uint8_t min_bitpool;
	uint8_t max_bitpool;
	} __attribute__ ((packed)) a2dp_sbc_t;

	typedef struct {
	uint8_t layer:3;
	uint8_t crc:1;
	uint8_t channel_mode:4;
	uint8_t rfa:1;
	uint8_t mpf:1;
	uint8_t frequency:6;
	uint16_t bitrate;
	} __attribute__ ((packed)) a2dp_mpeg_t;

	typedef struct {
	uint8_t object_type;
	uint8_t frequency1;
	uint8_t frequency2:4;
	uint8_t channels:2;
	uint8_t rfa:2;
	uint8_t vbr:1;
	uint8_t bitrate1:7;
	uint8_t bitrate2;
	uint8_t bitrate3;
	} __attribute__ ((packed)) a2dp_aac_t;

	typedef struct {
	a2dp_vendor_codec_t info;
	uint8_t frequency:4;
	uint8_t channel_mode:4;
	} __attribute__ ((packed)) a2dp_aptx_t;

	typedef struct {
	a2dp_vendor_codec_t info;
	uint8_t unknown[2];
	} __attribute__ ((packed)) a2dp_ldac_t;

	#else
	#error "Unknown byte order"
	#endif