arduino-esp32/tools/sdk/include/bluedroid/btc_a2dp_source.h

245 lines
8.5 KiB
C
Raw Normal View History

// Copyright 2015-2016 Espressif Systems (Shanghai) PTE LTD
//
// 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.
/*******************************************************************************
*
* Filename: btc_a2dp_source.h
*
*******************************************************************************/
#ifndef __BTC_A2DP_SOURCE_H__
#define __BTC_A2DP_SOURCE_H__
#include <stdbool.h>
#include "bt_target.h"
#include "bta_api.h"
#include "btc_av_api.h"
#include "esp_a2dp_api.h"
#if BTC_AV_SRC_INCLUDED
/*******************************************************************************
** Data types
*******************************************************************************/
/* tBTC_MEDIA_INIT_AUDIO msg structure */
typedef struct {
BT_HDR hdr;
UINT16 SamplingFreq; /* 16k, 32k, 44.1k or 48k*/
UINT8 ChannelMode; /* mono, dual, stereo or joint stereo*/
UINT8 NumOfSubBands; /* 4 or 8 */
UINT8 NumOfBlocks; /* 4, 8, 12 or 16*/
UINT8 AllocationMethod; /* loudness or SNR*/
UINT16 MtuSize; /* peer mtu size */
} tBTC_MEDIA_INIT_AUDIO;
/* tBTC_MEDIA_UPDATE_AUDIO msg structure */
typedef struct {
BT_HDR hdr;
UINT16 MinMtuSize; /* Minimum peer mtu size */
UINT8 MaxBitPool; /* Maximum peer bitpool */
UINT8 MinBitPool; /* Minimum peer bitpool */
} tBTC_MEDIA_UPDATE_AUDIO;
/* tBTC_MEDIA_INIT_AUDIO_FEEDING msg structure */
typedef struct {
BT_HDR hdr;
tBTC_AV_FEEDING_MODE feeding_mode;
tBTC_AV_MEDIA_FEEDINGS feeding;
} tBTC_MEDIA_INIT_AUDIO_FEEDING;
/*******************************************************************************
** Public functions
*******************************************************************************/
/*******************************************************************************
**
** Function btc_a2dp_source_startup
**
** Description Initialize and startup the A2DP source module. This function
** should be called by the BTC AV state machine prior to using
** the module
**
** Returns TRUE is success
**
*******************************************************************************/
bool btc_a2dp_source_startup(void);
/*******************************************************************************
**
** Function btc_a2dp_source_shutdown
**
** Description Shutdown and cleanup the A2DP source module.
**
*******************************************************************************/
void btc_a2dp_source_shutdown(void);
/*******************************************************************************
**
** Function btc_a2dp_source_enc_init_req
**
** Description Request to initialize the media task encoder
**
** Returns TRUE is success
**
*******************************************************************************/
BOOLEAN btc_a2dp_source_enc_init_req(tBTC_MEDIA_INIT_AUDIO *p_msg);
/*******************************************************************************
**
** Function btc_a2dp_source_enc_udpate_req
**
** Description Request to update the media task encoder
**
** Returns TRUE is success
**
*******************************************************************************/
BOOLEAN btc_a2dp_source_enc_update_req(tBTC_MEDIA_UPDATE_AUDIO *p_msg);
/*******************************************************************************
**
** Function btc_a2dp_source_start_audio_req
**
** Description Request to start audio encoding task
**
** Returns TRUE is success
**
*******************************************************************************/
BOOLEAN btc_a2dp_source_start_audio_req(void);
/*******************************************************************************
**
** Function btc_a2dp_source_stop_audio_req
**
** Description Request to stop audio encoding task
**
** Returns TRUE is success
**
*******************************************************************************/
BOOLEAN btc_a2dp_source_stop_audio_req(void);
/*******************************************************************************
**
** Function btc_a2dp_source_tx_flush_req
**
** Description Request to flush audio encoding pipe
**
** Returns TRUE is success
**
*******************************************************************************/
BOOLEAN btc_a2dp_source_tx_flush_req(void);
/*******************************************************************************
**
** Function btc_a2dp_source_audio_readbuf
**
2017-09-12 08:40:52 +02:00
** Description Read an audio buffer from the BTC media TX queue
**
2017-09-12 08:40:52 +02:00
** Returns pointer on a aa buffer ready to send
**
*******************************************************************************/
BT_HDR *btc_a2dp_source_audio_readbuf(void);
/*******************************************************************************
**
** Function btc_a2dp_source_audio_feeding_init_req
**
** Description Request to initialize audio feeding
**
** Returns TRUE if success
**
*******************************************************************************/
BOOLEAN btc_a2dp_source_audio_feeding_init_req(tBTC_MEDIA_INIT_AUDIO_FEEDING *p_msg);
/*******************************************************************************
**
** Function btc_a2dp_source_is_streaming
**
** Description Check whether A2DP source is in streaming state
**
*******************************************************************************/
bool btc_a2dp_source_is_streaming(void);
/*******************************************************************************
**
** Function btc_a2dp_source_is_task_shutting_down
**
** Description Check whether A2DP source media task is shutting down
**
*******************************************************************************/
bool btc_a2dp_source_is_task_shutting_down(void);
/*******************************************************************************
**
** Function btc_a2dp_source_on_idle
**
** Description Request 'idle' request from BTC AV state machine during
** initialization
**
*******************************************************************************/
void btc_a2dp_source_on_idle(void);
/*******************************************************************************
**
** Function btc_a2dp_source_on_stopped
**
** Description Process 'stop' request from the BTC AV state machine to stop
** A2DP streaming
**
*******************************************************************************/
void btc_a2dp_source_on_stopped(tBTA_AV_SUSPEND *p_av);
/*******************************************************************************
**
** Function btc_a2dp_source_on_suspended
**
** Description Process 'suspend' request from the BTC AV state machine to stop
** A2DP streaming
**
*******************************************************************************/
void btc_a2dp_source_on_suspended(tBTA_AV_SUSPEND *p_av);
/*******************************************************************************
**
** Function btc_a2dp_source_setup_codec
**
** Description initialize the encoder parameters
**
*******************************************************************************/
void btc_a2dp_source_setup_codec(void);
/*******************************************************************************
**
** Function btc_a2dp_source_set_tx_flush
**
** Description enable/disable discarding of transmitted frames
**
*******************************************************************************/
void btc_a2dp_source_set_tx_flush(BOOLEAN enable);
/*******************************************************************************
**
** Function btc_a2dp_source_encoder_update
**
** Description update changed SBC encoder parameters
**
*******************************************************************************/
void btc_a2dp_source_encoder_update(void);
#endif /* #if BTC_AV_SRC_INCLUDED */
#endif /* __BTC_A2DP_SOURCE_H__ */