| /* |
| * Copyright (C) 2012 The Android Open Source Project |
| * |
| * Licensed under the Apache License, Version 2.0 (the "License"); |
| * you may not use this file except in compliance with the License. |
| * You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| */ |
| |
| #ifndef ANDROID_INCLUDE_BT_AV_H |
| #define ANDROID_INCLUDE_BT_AV_H |
| |
| __BEGIN_DECLS |
| |
| /* Bluetooth AV connection states */ |
| typedef enum { |
| BTAV_CONNECTION_STATE_DISCONNECTED = 0, |
| BTAV_CONNECTION_STATE_CONNECTING, |
| BTAV_CONNECTION_STATE_CONNECTED, |
| BTAV_CONNECTION_STATE_DISCONNECTING |
| } btav_connection_state_t; |
| |
| /* Bluetooth AV datapath states */ |
| typedef enum { |
| BTAV_AUDIO_STATE_REMOTE_SUSPEND = 0, |
| BTAV_AUDIO_STATE_STOPPED, |
| BTAV_AUDIO_STATE_STARTED, |
| } btav_audio_state_t; |
| |
| |
| /** Callback for connection state change. |
| * state will have one of the values from btav_connection_state_t |
| */ |
| typedef void (* btav_connection_state_callback)(btav_connection_state_t state, |
| bt_bdaddr_t *bd_addr); |
| |
| /** Callback for audiopath state change. |
| * state will have one of the values from btav_audio_state_t |
| */ |
| typedef void (* btav_audio_state_callback)(btav_audio_state_t state, |
| bt_bdaddr_t *bd_addr); |
| |
| /** Callback for audio configuration change. |
| * Used only for the A2DP sink interface. |
| * state will have one of the values from btav_audio_state_t |
| * sample_rate: sample rate in Hz |
| * channel_count: number of channels (1 for mono, 2 for stereo) |
| */ |
| typedef void (* btav_audio_config_callback)(bt_bdaddr_t *bd_addr, |
| uint32_t sample_rate, |
| uint8_t channel_count); |
| |
| /** BT-AV callback structure. */ |
| typedef struct { |
| /** set to sizeof(btav_callbacks_t) */ |
| size_t size; |
| btav_connection_state_callback connection_state_cb; |
| btav_audio_state_callback audio_state_cb; |
| btav_audio_config_callback audio_config_cb; |
| } btav_callbacks_t; |
| |
| /** |
| * NOTE: |
| * |
| * 1. AVRCP 1.0 shall be supported initially. AVRCP passthrough commands |
| * shall be handled internally via uinput |
| * |
| * 2. A2DP data path shall be handled via a socket pipe between the AudioFlinger |
| * android_audio_hw library and the Bluetooth stack. |
| * |
| */ |
| /** Represents the standard BT-AV interface. |
| * Used for both the A2DP source and sink interfaces. |
| */ |
| typedef struct { |
| |
| /** set to sizeof(btav_interface_t) */ |
| size_t size; |
| /** |
| * Register the BtAv callbacks |
| */ |
| bt_status_t (*init)( btav_callbacks_t* callbacks ); |
| |
| /** connect to headset */ |
| bt_status_t (*connect)( bt_bdaddr_t *bd_addr ); |
| |
| /** dis-connect from headset */ |
| bt_status_t (*disconnect)( bt_bdaddr_t *bd_addr ); |
| |
| /** Closes the interface. */ |
| void (*cleanup)( void ); |
| } btav_interface_t; |
| |
| __END_DECLS |
| |
| #endif /* ANDROID_INCLUDE_BT_AV_H */ |