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/*
*
* BlueZ - Bluetooth protocol stack for Linux
*
* Copyright (C) 2004-2007 Marcel Holtmann <marcel@holtmann.org>
*
*
* 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
*
*/
#ifndef __AUDIO_IPC_H__
#define __AUDIO_IPC_H__
#include <stdint.h>
#define IPC_TYPE_CONNECT 0x0001
#define IPC_MTU 32
#define IPC_SOCKET_NAME "\0/org/bluez/audio"
#ifndef UNIX_PATH_MAX
#define UNIX_PATH_MAX 108
#endif
/* Supported roles */
#define PKT_ROLE_NONE 0
#define PKT_ROLE_AUTO 1
#define PKT_ROLE_VOICE 2
#define PKT_ROLE_HIFI 3
/* 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 {
uint8_t id; /* Device id */
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_CHANNEL_MODE_MONO (1 << 3)
#define CFG_CHANNEL_MODE_DUAL_CHANNEL (1 << 2)
#define CFG_CHANNEL_MODE_STEREO (1 << 1)
#define CFG_CHANNEL_MODE_JOINT_STEREO 1
/* Codec options */
#define CFG_CODEC_NONE 0
#define CFG_CODEC_SBC 1
struct ipc_data_cfg {
int fd; /* Stream file descriptor */
uint8_t fd_opt; /* Stream file descriptor options: read, write or readwrite*/
uint8_t channels; /* Number of audio channel */
uint8_t channel_mode; /* Audio channel mode*/
uint16_t pkt_len; /* Stream packet length */
uint8_t sample_size; /* Sample size in bytes */
uint16_t rate; /* Stream sample rate */
uint8_t codec; /* Stream codec */
uint8_t data[0]; /* Codec payload */
} __attribute__ ((packed));
/* SBC codec options */
#define CODEC_SBC_ALLOCATION_SNR (1 << 1)
#define CODEC_SBC_ALLOCATION_LOUDNESS 1
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));
#endif
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