1 /******************************************************************************
2 * Copyright (C) 2016, The Linux Foundation. All rights reserved.
5 *****************************************************************************/
6 /*****************************************************************************
7 * Copyright (C) 2009-2012 Broadcom Corporation
9 * Licensed under the Apache License, Version 2.0 (the "License");
10 * you may not use this file except in compliance with the License.
11 * You may obtain a copy of the License at:
13 * http://www.apache.org/licenses/LICENSE-2.0
15 * Unless required by applicable law or agreed to in writing, software
16 * distributed under the License is distributed on an "AS IS" BASIS,
17 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
18 * See the License for the specific language governing permissions and
19 * limitations under the License.
21 ******************************************************************************/
23 /*****************************************************************************
25 * Filename: audio_a2dp_hw.h
29 *****************************************************************************/
32 #include "audio_a2dp_hw.h"
33 #include <system/audio.h>
34 /*****************************************************************************
36 ******************************************************************************/
38 #define BT_AUDIO_HARDWARE_INTERFACE "libbthost"
39 #define A2DP_CTRL_PATH "/data/misc/bluedroid/.a2dp_ctrl"
40 #define A2DP_DATA_PATH "/data/misc/bluedroid/.a2dp_data"
43 A2DP_CTRL_GET_CODEC_CONFIG = 15,
44 A2DP_CTRL_GET_MULTICAST_STATUS,
45 A2DP_CTRL_GET_CONNECTION_STATUS,
49 codec specific definitions
51 #define CODEC_TYPE_SBC 0x00
52 #define CODEC_TYPE_AAC 0x02
53 #define NON_A2DP_CODEC_TYPE 0xFF
54 #define CODEC_OFFSET 3
55 #define VENDOR_ID_OFFSET 4
56 #define CODEC_ID_OFFSET (VENDOR_ID_OFFSET + 4)
57 #define CODEC_TYPE_PCM 0x05
60 #define VENDOR_APTX 0x4F
62 #ifndef VENDOR_APTX_HD
63 #define VENDOR_APTX_HD 0xD7
65 #ifndef VENDOR_APTX_LL
66 #define VENDOR_APTX_LL 0x0A
69 #define APTX_CODEC_ID 0x01
71 #ifndef APTX_HD_CODEC_ID
72 #define APTX_HD_CODEC_ID 0x24
75 #define A2D_SBC_FREQ_MASK 0xF0
76 #define A2D_SBC_CHN_MASK 0x0F
77 #define A2D_SBC_BLK_MASK 0xF0
78 #define A2D_SBC_SUBBAND_MASK 0x0C
79 #define A2D_SBC_ALLOC_MASK 0x03
80 #define A2D_SBC_SAMP_FREQ_16 0x80 /* b7:16 kHz */
81 #define A2D_SBC_SAMP_FREQ_32 0x40 /* b6:32 kHz */
82 #define A2D_SBC_SAMP_FREQ_44 0x20 /* b5:44.1kHz */
83 #define A2D_SBC_SAMP_FREQ_48 0x10 /* b4:48 kHz */
84 #define A2D_SBC_CH_MD_MONO 0x08 /* b3: mono */
85 #define A2D_SBC_CH_MD_DUAL 0x04 /* b2: dual */
86 #define A2D_SBC_CH_MD_STEREO 0x02 /* b1: stereo */
87 #define A2D_SBC_CH_MD_JOINT 0x01 /* b0: joint stereo */
88 #define A2D_SBC_BLOCKS_4 0x80 /* 4 blocks */
89 #define A2D_SBC_BLOCKS_8 0x40 /* 8 blocks */
90 #define A2D_SBC_BLOCKS_12 0x20 /* 12blocks */
91 #define A2D_SBC_BLOCKS_16 0x10 /* 16blocks */
92 #define A2D_SBC_SUBBAND_4 0x08 /* b3: 4 */
93 #define A2D_SBC_SUBBAND_8 0x04 /* b2: 8 */
94 #define A2D_SBC_ALLOC_MD_S 0x02 /* b1: SNR */
95 #define A2D_SBC_ALLOC_MD_L 0x01 /* b0: loundess */
97 /* APTX bitmask helper */
98 #define A2D_APTX_SAMP_FREQ_MASK 0xF0
99 #define A2D_APTX_SAMP_FREQ_48 0x10
100 #define A2D_APTX_SAMP_FREQ_44 0x20
101 #define A2D_APTX_CHAN_MASK 0x0F
102 #define A2D_APTX_CHAN_STEREO 0x02
103 #define A2D_APTX_CHAN_MONO 0x01
106 #define A2D_AAC_IE_OBJ_TYPE_MSK 0xF0 /* b7-b4 Object Type */
107 #define A2D_AAC_IE_OBJ_TYPE_MPEG_2_AAC_LC 0x80 /* b7:MPEG-2 AAC LC */
108 #define A2D_AAC_IE_OBJ_TYPE_MPEG_4_AAC_LC 0x40 /* b7:MPEG-4 AAC LC */
109 #define A2D_AAC_IE_OBJ_TYPE_MPEG_4_AAC_LTP 0x20 /* b7:MPEG-4 AAC LTP */
110 #define A2D_AAC_IE_OBJ_TYPE_MPEG_4_AAC_SCA 0x10 /* b7:MPEG-4 AAC SCALABLE */
112 #define A2D_AAC_IE_CHANNELS_MSK 0x0C
113 #define A2D_AAC_IE_CHANNELS_1 0x08 /* Channel 1 */
114 #define A2D_AAC_IE_CHANNELS_2 0x04 /* Channel 2 */
116 #define A2D_AAC_IE_VBR_MSK 0x80
117 #define A2D_AAC_IE_VBR 0x80 /* supported */
122 uint16_t sampling_rate; /*44.1khz,48khz*/
123 uint8_t chn; /*0(Mono),1(Dual),2(Stereo),3(JS)*/
124 uint8_t blk_len; /*4,8,12,16 */
125 uint8_t subband; /*4,8*/
126 uint8_t alloc; /*0(Loudness),1(SNR)*/
127 uint8_t min_bitpool; /* 2 */
128 uint8_t max_bitpool; /*53(44.1khz),51 (48khz) */
138 uint16_t sampling_rate;
146 /** Set to sizeof(bt_host_ipc_interface_t) */
148 void (*a2dp_open_ctrl_path)(struct a2dp_stream_common *common);
149 void (*a2dp_stream_common_init)(struct a2dp_stream_common *common);
150 int (*start_audio_datapath)(struct a2dp_stream_common *common);
151 int (*suspend_audio_datapath)(struct a2dp_stream_common *common, bool standby);
152 int (*stop_audio_datapath)(struct a2dp_stream_common *common);
153 int (*check_a2dp_stream_started)(struct a2dp_stream_common *common);
154 int (*check_a2dp_ready)(struct a2dp_stream_common *common);
155 int (*a2dp_read_audio_config)(struct a2dp_stream_common *common);
156 int (*skt_read)(int fd,void *buf, size_t bytes);
157 int (*skt_write)(int fd,const void *buf, size_t bytes);
158 int (*skt_disconnect)(int fd);
159 int (*a2dp_command)(struct a2dp_stream_common *common,char cmd);
160 int (*audio_stream_open)(void);
161 int (*audio_stream_close)(void);
162 int (*audio_start_stream)(void);
163 int (*audio_stop_stream)(void);
164 int (*audio_suspend_stream)(void);
165 void* (*audio_get_codec_config)(uint8_t *mcast, uint8_t *num_dev, audio_format_t *codec_type);
166 void (*audio_handoff_triggered)(void);
167 void (*clear_a2dpsuspend_flag)(void);
168 void*(*audio_get_next_codec_config)(uint8_t idx, audio_format_t *codec_type);
170 } bt_host_ipc_interface_t;