// 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_media.h
*
* Description: This is the audio module for the BTC system.
*
*******************************************************************************/
#ifndef __BTC_MEDIA_H__
#define __BTC_MEDIA_H__
#include <stdbool.h>
#include "bta_api.h"
#include "btc_av_api.h"
#if (BTA_AV_INCLUDED == TRUE)
/*******************************************************************************
** Constants
*******************************************************************************/
#define BTC_SUCCESS (0)
/**
* AV (Audio Video source) Errors
*/
#define BTC_ERROR_SRV_AV_NOT_ENABLED 700 /* AV is not enabled */
#define BTC_ERROR_SRV_AV_FEEDING_NOT_SUPPORTED 701 /* Requested Feeding not supported */
#define BTC_ERROR_SRV_AV_BUSY 702 /* Another operation ongoing */
#define BTC_ERROR_SRV_AV_NOT_OPENED 703 /* No AV link opened */
#define BTC_ERROR_SRV_AV_NOT_STARTED 704 /* AV is not started */
#define BTC_ERROR_SRV_AV_CP_NOT_SUPPORTED 705 /* Content protection is not supported by all headsets */
/* Transcoding definition for TxTranscoding and RxTranscoding */
#define BTC_MEDIA_TRSCD_OFF 0
#define BTC_MEDIA_TRSCD_PCM_2_SBC 1 /* Tx */
/*******************************************************************************
** Data types
*******************************************************************************/
typedef int tBTC_STATUS;
/* 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;
#if (BTA_AV_INCLUDED == TRUE)
/* 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;
typedef struct {
BT_HDR hdr;
UINT8 codec_info[AVDT_CODEC_SIZE];
} tBTC_MEDIA_SINK_CFG_UPDATE;
#endif
/*******************************************************************************
** Public functions
*******************************************************************************/
/*******************************************************************************
**
** Function btc_av_task
**
** Description
**
** Returns void
**
*******************************************************************************/
extern void btc_media_task(void);
/*******************************************************************************
**
** Function btc_media_task_enc_init_req
**
** Description Request to initialize the media task encoder
**
** Returns TRUE is success
**
*******************************************************************************/
extern BOOLEAN btc_media_task_enc_init_req(tBTC_MEDIA_INIT_AUDIO *p_msg);
/*******************************************************************************
**
** Function btc_media_task_enc_update_req
**
** Description Request to update the media task encoder
**
** Returns TRUE is success
**
*******************************************************************************/
#if (BTA_AV_INCLUDED == TRUE)
extern BOOLEAN btc_media_task_enc_update_req(tBTC_MEDIA_UPDATE_AUDIO *p_msg);
#endif
/*******************************************************************************
**
** Function btc_media_task_start_aa_req
**
** Description Request to start audio encoding task
**
** Returns TRUE is success
**
*******************************************************************************/
extern BOOLEAN btc_media_task_start_aa_req(void);
/*******************************************************************************
**
** Function btc_media_task_stop_aa_req
**
** Description Request to stop audio encoding task
**
** Returns TRUE is success
**
*******************************************************************************/
extern BOOLEAN btc_media_task_stop_aa_req(void);
/*******************************************************************************
**
** Function btc_media_task_aa_rx_flush_req
**
** Description Request to flush audio decoding pipe
**
** Returns TRUE is success
**
*******************************************************************************/
extern BOOLEAN btc_media_task_aa_rx_flush_req(void);
/*******************************************************************************
**
** Function btc_media_task_aa_tx_flush_req
**
** Description Request to flush audio encoding pipe
**
** Returns TRUE is success
**
*******************************************************************************/
extern BOOLEAN btc_media_task_aa_tx_flush_req(void);
/*******************************************************************************
**
** Function btc_media_aa_readbuf
**
** Description Read an audio buffer from the BTC media TX queue
**
** Returns pointer on a aa buffer ready to send
**
*******************************************************************************/
extern BT_HDR *btc_media_aa_readbuf(void);
/*******************************************************************************
**
** Function btc_media_sink_enque_buf
**
** Description This function is called by the av_co to fill A2DP Sink Queue
**
**
** Returns size of the queue
*******************************************************************************/
UINT8 btc_media_sink_enque_buf(BT_HDR *p_buf);
/*******************************************************************************
**
** Function btc_media_aa_writebuf
**
** Description Enqueue a Advance Audio media buffer to be processed by btc media task.
**
** Returns TRUE is success
**
*******************************************************************************/
extern void btc_media_aa_writebuf(BT_HDR *pBuf, UINT32 timestamp, UINT16 seq_num);
/*******************************************************************************
**
** Function btc_media_av_writebuf
**
** Description Enqueue a video media buffer to be processed by btc media task.
**
** Returns TRUE is success
**
*******************************************************************************/
extern BOOLEAN btc_media_av_writebuf(UINT8 *p_media, UINT32 media_len,
UINT32 timestamp, UINT16 seq_num);
#if (BTA_AV_INCLUDED == TRUE)
/*******************************************************************************
**
** Function btc_media_task_audio_feeding_init_req
**
** Description Request to initialize audio feeding
**
** Returns TRUE is success
**
*******************************************************************************/
extern BOOLEAN btc_media_task_audio_feeding_init_req(tBTC_MEDIA_INIT_AUDIO_FEEDING *p_msg);
#endif
/*******************************************************************************
**
** Function dump_codec_info
**
** Description Decode and display codec_info (for debug)
**
** Returns void
**
*******************************************************************************/
extern void dump_codec_info(unsigned char *p_codec);
/**
* Local adaptation helper functions between btc and media task
*/
bool btc_a2dp_start_media_task(void);
void btc_a2dp_stop_media_task(void);
void btc_a2dp_on_init(void);
void btc_a2dp_setup_codec(void);
void btc_a2dp_on_idle(void);
BOOLEAN btc_a2dp_on_started(tBTA_AV_START *p_av, BOOLEAN pending_start);
void btc_a2dp_on_stop_req(void);
void btc_a2dp_on_stopped(tBTA_AV_SUSPEND *p_av);
void btc_a2dp_on_suspend(void);
void btc_a2dp_on_suspended(tBTA_AV_SUSPEND *p_av);
void btc_a2dp_set_rx_flush(BOOLEAN enable);
void btc_media_check_iop_exceptions(UINT8 *peer_bda);
void btc_reset_decoder(UINT8 *p_av);
int btc_a2dp_get_track_frequency(UINT8 frequency);
int btc_a2dp_get_track_channel_count(UINT8 channeltype);
void btc_a2dp_set_peer_sep(UINT8 sep);
#endif ///BTA_AV_INCLUDED == TRUE
#endif