ipc.h revision c2833e263d6cfc4cf82f4bfdcc59640a4071aeae
1/* 2 * 3 * BlueZ - Bluetooth protocol stack for Linux 4 * 5 * Copyright (C) 2004-2007 Marcel Holtmann <marcel@holtmann.org> 6 * 7 * 8 * This program is free software; you can redistribute it and/or modify 9 * it under the terms of the GNU General Public License as published by 10 * the Free Software Foundation; either version 2 of the License, or 11 * (at your option) any later version. 12 * 13 * This program is distributed in the hope that it will be useful, 14 * but WITHOUT ANY WARRANTY; without even the implied warranty of 15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 16 * GNU General Public License for more details. 17 * 18 * You should have received a copy of the GNU General Public License 19 * along with this program; if not, write to the Free Software 20 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA 21 * 22 */ 23 24#define IPC_TYPE_CONNECT 0x0001 25 26#define IPC_MTU 32 27 28#define IPC_SOCKET_NAME "\0/org/bluez/audio" 29 30#ifndef UNIX_PATH_MAX 31#define UNIX_PATH_MAX 108 32#endif 33 34/* Supported roles */ 35#define PKT_ROLE_NONE 0 36#define PKT_ROLE_AUTO 1 37#define PKT_ROLE_VOICE 2 38#define PKT_ROLE_HIFI 3 39 40/* Packet types */ 41#define PKT_TYPE_CFG_REQ 0 42#define PKT_TYPE_CFG_RSP 1 43#define PKT_TYPE_STATE_REQ 2 44#define PKT_TYPE_STATE_RSP 3 45#define PKT_TYPE_CTL_REQ 4 46#define PKT_TYPE_CTL_RSP 5 47#define PKT_TYPE_CTL_NTFY 6 48 49/* Errors codes */ 50#define PKT_ERROR_NONE 0 51 52struct ipc_packet { 53 uint8_t id; /* Device id */ 54 uint8_t role; /* Audio role eg: voice, wifi, auto... */ 55 uint8_t type; /* Packet type */ 56 uint8_t error; /* Packet error code */ 57 uint8_t length; /* Payload length in bytes */ 58 uint8_t data[0]; /* Packet payload */ 59} __attribute__ ((packed)); 60 61/* File descriptor options */ 62#define CFG_FD_OPT_READ 0 63#define CFG_FD_OPT_WRITE 1 64#define CFG_FD_OPT_READWRITE 2 65 66/* Audio channel mode */ 67#define CFG_CHANNEL_MODE_MONO (1 << 3) 68#define CFG_CHANNEL_MODE_DUAL_CHANNEL (1 << 2) 69#define CFG_CHANNEL_MODE_STEREO (1 << 1) 70#define CFG_CHANNEL_MODE_JOINT_STEREO 1 71 72/* Codec options */ 73#define CFG_CODEC_NONE 0 74#define CFG_CODEC_SBC 1 75 76struct ipc_data_cfg { 77 uint8_t fd_opt; /* Stream file descriptor options: read, 78 write or readwrite */ 79 uint8_t channels; /* Number of audio channel */ 80 uint8_t channel_mode; /* Audio channel mode*/ 81 uint16_t pkt_len; /* Stream packet length */ 82 uint8_t sample_size; /* Sample size in bytes */ 83 uint16_t rate; /* Stream sample rate */ 84 uint8_t codec; /* Stream codec */ 85 uint8_t data[0]; /* Codec payload */ 86} __attribute__ ((packed)); 87 88/* SBC codec options */ 89#define CODEC_SBC_ALLOCATION_SNR (1 << 1) 90#define CODEC_SBC_ALLOCATION_LOUDNESS 1 91 92struct ipc_codec_sbc { 93 uint8_t allocation; 94 uint8_t subbands; 95 uint8_t blocks; 96 uint8_t bitpool; 97} __attribute__ ((packed)); 98 99/* Device status */ 100#define STATE_DISCONNECTED 0 101#define STATE_CONNECTING 1 102#define STATE_CONNECTED 2 103#define STATE_STREAM_STARTING 3 104#define STATE_STREAMING 4 105 106struct ipc_data_state { 107 uint8_t state; /* Stream state */ 108} __attribute__ ((packed)); 109 110#define CTL_MODE_PLAYBACK 0 111#define CTL_MODE_CAPTURE 1 112#define CTL_MODE_GENERAL 2 113 114/* Supported control operations */ 115#define CTL_KEY_POWER 0x40 116#define CTL_KEY_VOL_UP 0x41 117#define CTL_KEY_VOL_DOWN 0x42 118#define CTL_KEY_MUTE 0x43 119#define CTL_KEY_PLAY 0x44 120#define CTL_KEY_STOP 0x45 121#define CTL_KEY_PAUSE 0x46 122#define CTL_KEY_RECORD 0x47 123#define CTL_KEY_REWIND 0x48 124#define CTL_KEY_FAST_FORWARD 0x49 125#define CTL_KEY_EJECT 0x4A 126#define CTL_KEY_FORWARD 0x4B 127#define CTL_KEY_BACKWARD 0x4C 128 129struct ipc_data_ctl { 130 uint8_t mode; /* Control Mode */ 131 uint8_t key; /* Control Key */ 132} __attribute__ ((packed)); 133