21e50b1898
Both use the same structs for APIs and callbacks, but now source and sink mode can operate independently with separate Bluetooth profile services in the framework. An extra callback btav_audio_config_callback is used for reporting audio configuration for A2DP sink role Change-Id: I6e8172b66ff95e61721d1c35790609b7ae2be030
103 lines
3.2 KiB
C
103 lines
3.2 KiB
C
/*
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* Copyright (C) 2012 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#ifndef ANDROID_INCLUDE_BT_AV_H
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#define ANDROID_INCLUDE_BT_AV_H
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__BEGIN_DECLS
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/* Bluetooth AV connection states */
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typedef enum {
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BTAV_CONNECTION_STATE_DISCONNECTED = 0,
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BTAV_CONNECTION_STATE_CONNECTING,
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BTAV_CONNECTION_STATE_CONNECTED,
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BTAV_CONNECTION_STATE_DISCONNECTING
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} btav_connection_state_t;
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/* Bluetooth AV datapath states */
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typedef enum {
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BTAV_AUDIO_STATE_REMOTE_SUSPEND = 0,
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BTAV_AUDIO_STATE_STOPPED,
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BTAV_AUDIO_STATE_STARTED,
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} btav_audio_state_t;
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/** Callback for connection state change.
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* state will have one of the values from btav_connection_state_t
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*/
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typedef void (* btav_connection_state_callback)(btav_connection_state_t state,
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bt_bdaddr_t *bd_addr);
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/** Callback for audiopath state change.
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* state will have one of the values from btav_audio_state_t
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*/
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typedef void (* btav_audio_state_callback)(btav_audio_state_t state,
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bt_bdaddr_t *bd_addr);
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/** Callback for audio configuration change.
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* Used only for the A2DP sink interface.
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* state will have one of the values from btav_audio_state_t
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* sample_rate: sample rate in Hz
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* channel_count: number of channels (1 for mono, 2 for stereo)
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*/
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typedef void (* btav_audio_config_callback)(bt_bdaddr_t *bd_addr,
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uint32_t sample_rate,
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uint8_t channel_count);
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/** BT-AV callback structure. */
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typedef struct {
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/** set to sizeof(btav_callbacks_t) */
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size_t size;
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btav_connection_state_callback connection_state_cb;
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btav_audio_state_callback audio_state_cb;
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btav_audio_config_callback audio_config_cb;
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} btav_callbacks_t;
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/**
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* NOTE:
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*
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* 1. AVRCP 1.0 shall be supported initially. AVRCP passthrough commands
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* shall be handled internally via uinput
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*
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* 2. A2DP data path shall be handled via a socket pipe between the AudioFlinger
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* android_audio_hw library and the Bluetooth stack.
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*
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*/
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/** Represents the standard BT-AV interface.
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* Used for both the A2DP source and sink interfaces.
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*/
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typedef struct {
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/** set to sizeof(btav_interface_t) */
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size_t size;
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/**
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* Register the BtAv callbacks
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*/
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bt_status_t (*init)( btav_callbacks_t* callbacks );
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/** connect to headset */
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bt_status_t (*connect)( bt_bdaddr_t *bd_addr );
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/** dis-connect from headset */
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bt_status_t (*disconnect)( bt_bdaddr_t *bd_addr );
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/** Closes the interface. */
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void (*cleanup)( void );
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} btav_interface_t;
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__END_DECLS
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#endif /* ANDROID_INCLUDE_BT_AV_H */
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