Andre Eisenbach | 05f4954 | 2012-09-18 12:15:26 -0700 | [diff] [blame] | 1 | /* |
| 2 | * Copyright (C) 2012 The Android Open Source Project |
| 3 | * |
| 4 | * Licensed under the Apache License, Version 2.0 (the "License"); |
| 5 | * you may not use this file except in compliance with the License. |
| 6 | * You may obtain a copy of the License at |
| 7 | * |
| 8 | * http://www.apache.org/licenses/LICENSE-2.0 |
| 9 | * |
| 10 | * Unless required by applicable law or agreed to in writing, software |
| 11 | * distributed under the License is distributed on an "AS IS" BASIS, |
| 12 | * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| 13 | * See the License for the specific language governing permissions and |
| 14 | * limitations under the License. |
| 15 | */ |
| 16 | |
| 17 | #ifndef ANDROID_INCLUDE_BT_AV_H |
| 18 | #define ANDROID_INCLUDE_BT_AV_H |
| 19 | |
| 20 | __BEGIN_DECLS |
| 21 | |
| 22 | /* Bluetooth AV connection states */ |
| 23 | typedef enum { |
| 24 | BTAV_CONNECTION_STATE_DISCONNECTED = 0, |
| 25 | BTAV_CONNECTION_STATE_CONNECTING, |
| 26 | BTAV_CONNECTION_STATE_CONNECTED, |
| 27 | BTAV_CONNECTION_STATE_DISCONNECTING |
| 28 | } btav_connection_state_t; |
| 29 | |
| 30 | /* Bluetooth AV datapath states */ |
| 31 | typedef enum { |
| 32 | BTAV_AUDIO_STATE_REMOTE_SUSPEND = 0, |
| 33 | BTAV_AUDIO_STATE_STOPPED, |
| 34 | BTAV_AUDIO_STATE_STARTED, |
| 35 | } btav_audio_state_t; |
| 36 | |
| 37 | |
| 38 | /** Callback for connection state change. |
| 39 | * state will have one of the values from btav_connection_state_t |
| 40 | */ |
| 41 | typedef void (* btav_connection_state_callback)(btav_connection_state_t state, |
| 42 | bt_bdaddr_t *bd_addr); |
| 43 | |
| 44 | /** Callback for audiopath state change. |
| 45 | * state will have one of the values from btav_audio_state_t |
| 46 | */ |
| 47 | typedef void (* btav_audio_state_callback)(btav_audio_state_t state, |
| 48 | bt_bdaddr_t *bd_addr); |
| 49 | |
Mike Lockwood | 21e50b1 | 2014-06-07 14:05:22 -0700 | [diff] [blame] | 50 | /** Callback for audio configuration change. |
| 51 | * Used only for the A2DP sink interface. |
| 52 | * state will have one of the values from btav_audio_state_t |
| 53 | * sample_rate: sample rate in Hz |
| 54 | * channel_count: number of channels (1 for mono, 2 for stereo) |
| 55 | */ |
| 56 | typedef void (* btav_audio_config_callback)(bt_bdaddr_t *bd_addr, |
| 57 | uint32_t sample_rate, |
| 58 | uint8_t channel_count); |
| 59 | |
Andre Eisenbach | 05f4954 | 2012-09-18 12:15:26 -0700 | [diff] [blame] | 60 | /** BT-AV callback structure. */ |
| 61 | typedef struct { |
| 62 | /** set to sizeof(btav_callbacks_t) */ |
| 63 | size_t size; |
| 64 | btav_connection_state_callback connection_state_cb; |
| 65 | btav_audio_state_callback audio_state_cb; |
Mike Lockwood | 21e50b1 | 2014-06-07 14:05:22 -0700 | [diff] [blame] | 66 | btav_audio_config_callback audio_config_cb; |
Andre Eisenbach | 05f4954 | 2012-09-18 12:15:26 -0700 | [diff] [blame] | 67 | } btav_callbacks_t; |
| 68 | |
| 69 | /** |
| 70 | * NOTE: |
| 71 | * |
| 72 | * 1. AVRCP 1.0 shall be supported initially. AVRCP passthrough commands |
| 73 | * shall be handled internally via uinput |
| 74 | * |
| 75 | * 2. A2DP data path shall be handled via a socket pipe between the AudioFlinger |
| 76 | * android_audio_hw library and the Bluetooth stack. |
| 77 | * |
| 78 | */ |
Mike Lockwood | 21e50b1 | 2014-06-07 14:05:22 -0700 | [diff] [blame] | 79 | /** Represents the standard BT-AV interface. |
| 80 | * Used for both the A2DP source and sink interfaces. |
| 81 | */ |
Andre Eisenbach | 05f4954 | 2012-09-18 12:15:26 -0700 | [diff] [blame] | 82 | typedef struct { |
| 83 | |
| 84 | /** set to sizeof(btav_interface_t) */ |
| 85 | size_t size; |
| 86 | /** |
| 87 | * Register the BtAv callbacks |
| 88 | */ |
| 89 | bt_status_t (*init)( btav_callbacks_t* callbacks ); |
| 90 | |
| 91 | /** connect to headset */ |
| 92 | bt_status_t (*connect)( bt_bdaddr_t *bd_addr ); |
| 93 | |
| 94 | /** dis-connect from headset */ |
| 95 | bt_status_t (*disconnect)( bt_bdaddr_t *bd_addr ); |
| 96 | |
| 97 | /** Closes the interface. */ |
| 98 | void (*cleanup)( void ); |
| 99 | } btav_interface_t; |
| 100 | |
| 101 | __END_DECLS |
| 102 | |
| 103 | #endif /* ANDROID_INCLUDE_BT_AV_H */ |