ipc.h

实现bluez蓝牙profile需要的库

/*
 *
 *  BlueZ - Bluetooth protocol stack for Linux
 *
 *  Copyright (C) 2004-2007  Marcel Holtmann <[e-mail]>
 *
 *
 *  This program is free software; you can redistribute it and/or modify
 *  it under the terms of the GNU General Public License as published by
 *  the Free Software Foundation; either version 2 of the License, or
 *  (at your option) any later version.
 *
 *  This program 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 General Public License for more details.
 *
 *  You should have received a copy of the GNU General Public License
 *  along with this program; if not, write to the Free Software
 *  Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
 *
 */

#include <stdint.h>

#define IPC_TYPE_CONNECT  0x0001

#define IPC_MTU 128

#define IPC_SOCKET_NAME "\0/org/bluez/audio"

#ifndef UNIX_PATH_MAX
#define UNIX_PATH_MAX 108
#endif

/* Supported roles */
#define PKT_ROLE_AUTO			0
#define PKT_ROLE_VOICE			1
#define PKT_ROLE_HIFI			2

/* Packet types */
#define PKT_TYPE_CFG_REQ		0
#define PKT_TYPE_CFG_RSP		1
#define PKT_TYPE_STATE_REQ		2
#define PKT_TYPE_STATE_RSP		3
#define PKT_TYPE_CTL_REQ		4
#define PKT_TYPE_CTL_RSP		5
#define PKT_TYPE_CTL_NTFY		6

/* Errors codes */
#define PKT_ERROR_NONE			0

struct ipc_packet {
	char device[18];	/* Address of the remote Device */
	uint8_t role;		/* Audio role eg: voice, wifi, auto... */
	uint8_t type;		/* Packet type */
	uint8_t error;		/* Packet error code */
	uint8_t length;		/* Payload length in bytes */
	uint8_t data[0];	/* Packet payload */
} __attribute__ ((packed));

/* File descriptor options */
#define CFG_FD_OPT_READ		0
#define CFG_FD_OPT_WRITE	1
#define CFG_FD_OPT_READWRITE	2

/* Audio channel mode */
#define CFG_MODE_AUTO		0
#define CFG_MODE_MONO		1
#define CFG_MODE_DUAL_CHANNEL	2
#define CFG_MODE_STEREO		3
#define CFG_MODE_JOINT_STEREO	4

/* Allocation method */
#define CFG_ALLOCATION_AUTO	0
#define CFG_ALLOCATION_LOUDNESS	1
#define CFG_ALLOCATION_SNR	2

/* Codec options */
#define CFG_CODEC_NONE		0
#define CFG_CODEC_SCO		1
#define CFG_CODEC_SBC		2

struct ipc_data_cfg {
	uint8_t  fd_opt;	/* Stream file descriptor options: read,
				   write or readwrite */
	uint16_t pkt_len;	/* Stream packet length */
	uint8_t  sample_size;	/* Sample size in bytes */
	uint8_t  mode;		/* Audio channel mode */
	uint16_t rate;		/* Stream sample rate */
	uint8_t  codec;		/* Stream codec */
	uint8_t  data[0];	/* Codec payload */
} __attribute__ ((packed));

struct ipc_codec_sbc {
	uint8_t allocation;
	uint8_t subbands;
	uint8_t blocks;
	uint8_t bitpool;
} __attribute__ ((packed));

/* Device status */
#define STATE_DISCONNECTED		0
#define STATE_CONNECTING		1
#define STATE_CONNECTED			2
#define STATE_STREAM_STARTING		3
#define STATE_STREAMING			4

struct ipc_data_state {
	uint8_t state;		/* Stream state */
} __attribute__ ((packed));

#define CTL_MODE_PLAYBACK		0
#define CTL_MODE_CAPTURE		1
#define CTL_MODE_GENERAL		2

/* Supported control operations */
#define CTL_KEY_POWER			0x40
#define CTL_KEY_VOL_UP			0x41
#define CTL_KEY_VOL_DOWN		0x42
#define CTL_KEY_MUTE			0x43
#define CTL_KEY_PLAY			0x44
#define CTL_KEY_STOP			0x45
#define CTL_KEY_PAUSE			0x46
#define CTL_KEY_RECORD			0x47
#define CTL_KEY_REWIND			0x48
#define CTL_KEY_FAST_FORWARD		0x49
#define CTL_KEY_EJECT			0x4A
#define CTL_KEY_FORWARD			0x4B
#define CTL_KEY_BACKWARD		0x4C

struct ipc_data_ctl {
	uint8_t mode;		/* Control Mode */
	uint8_t key;		/* Control Key */
}  __attribute__ ((packed));