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/*
* 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 */
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