269 lines
9.1 KiB
C
269 lines
9.1 KiB
C
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// Copyright 2015-2016 Espressif Systems (Shanghai) PTE LTD
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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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// 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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*
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* Filename: btc_media.h
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*
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* Description: This is the audio module for the BTC system.
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*
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*******************************************************************************/
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#ifndef __BTC_MEDIA_H__
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#define __BTC_MEDIA_H__
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#include <stdbool.h>
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#include "bta_api.h"
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#include "gki.h"
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#include "btc_av_api.h"
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#if (BTA_AV_INCLUDED == TRUE)
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/*******************************************************************************
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** Constants
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*******************************************************************************/
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#define BTC_SUCCESS (0)
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/**
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* AV (Audio Video source) Errors
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*/
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#define BTC_ERROR_SRV_AV_NOT_ENABLED 700 /* AV is not enabled */
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#define BTC_ERROR_SRV_AV_FEEDING_NOT_SUPPORTED 701 /* Requested Feeding not supported */
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#define BTC_ERROR_SRV_AV_BUSY 702 /* Another operation ongoing */
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#define BTC_ERROR_SRV_AV_NOT_OPENED 703 /* No AV link opened */
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#define BTC_ERROR_SRV_AV_NOT_STARTED 704 /* AV is not started */
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#define BTC_ERROR_SRV_AV_CP_NOT_SUPPORTED 705 /* Content protection is not supported by all headsets */
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/* Transcoding definition for TxTranscoding and RxTranscoding */
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#define BTC_MEDIA_TRSCD_OFF 0
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#define BTC_MEDIA_TRSCD_PCM_2_SBC 1 /* Tx */
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/*******************************************************************************
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** Data types
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*******************************************************************************/
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typedef int tBTC_STATUS;
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/* tBTC_MEDIA_INIT_AUDIO msg structure */
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typedef struct {
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BT_HDR hdr;
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UINT16 SamplingFreq; /* 16k, 32k, 44.1k or 48k*/
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UINT8 ChannelMode; /* mono, dual, stereo or joint stereo*/
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UINT8 NumOfSubBands; /* 4 or 8 */
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UINT8 NumOfBlocks; /* 4, 8, 12 or 16*/
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UINT8 AllocationMethod; /* loudness or SNR*/
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UINT16 MtuSize; /* peer mtu size */
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} tBTC_MEDIA_INIT_AUDIO;
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#if (BTA_AV_INCLUDED == TRUE)
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/* tBTC_MEDIA_UPDATE_AUDIO msg structure */
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typedef struct {
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BT_HDR hdr;
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UINT16 MinMtuSize; /* Minimum peer mtu size */
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UINT8 MaxBitPool; /* Maximum peer bitpool */
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UINT8 MinBitPool; /* Minimum peer bitpool */
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} tBTC_MEDIA_UPDATE_AUDIO;
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/* tBTC_MEDIA_INIT_AUDIO_FEEDING msg structure */
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typedef struct {
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BT_HDR hdr;
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tBTC_AV_FEEDING_MODE feeding_mode;
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tBTC_AV_MEDIA_FEEDINGS feeding;
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} tBTC_MEDIA_INIT_AUDIO_FEEDING;
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typedef struct {
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BT_HDR hdr;
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UINT8 codec_info[AVDT_CODEC_SIZE];
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} tBTC_MEDIA_SINK_CFG_UPDATE;
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#endif
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/*******************************************************************************
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** Public functions
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*******************************************************************************/
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/*******************************************************************************
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**
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** Function btc_av_task
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**
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** Description
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**
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** Returns void
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**
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*******************************************************************************/
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extern void btc_media_task(void);
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/*******************************************************************************
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**
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** Function btc_media_task_enc_init_req
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**
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** Description Request to initialize the media task encoder
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**
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** Returns TRUE is success
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**
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*******************************************************************************/
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extern BOOLEAN btc_media_task_enc_init_req(tBTC_MEDIA_INIT_AUDIO *p_msg);
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/*******************************************************************************
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**
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** Function btc_media_task_enc_update_req
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**
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** Description Request to update the media task encoder
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**
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** Returns TRUE is success
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**
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*******************************************************************************/
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#if (BTA_AV_INCLUDED == TRUE)
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extern BOOLEAN btc_media_task_enc_update_req(tBTC_MEDIA_UPDATE_AUDIO *p_msg);
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#endif
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/*******************************************************************************
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**
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** Function btc_media_task_start_aa_req
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**
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** Description Request to start audio encoding task
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**
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** Returns TRUE is success
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**
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*******************************************************************************/
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extern BOOLEAN btc_media_task_start_aa_req(void);
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/*******************************************************************************
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**
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** Function btc_media_task_stop_aa_req
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**
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** Description Request to stop audio encoding task
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**
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** Returns TRUE is success
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**
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*******************************************************************************/
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extern BOOLEAN btc_media_task_stop_aa_req(void);
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/*******************************************************************************
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**
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** Function btc_media_task_aa_rx_flush_req
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**
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** Description Request to flush audio decoding pipe
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**
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** Returns TRUE is success
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**
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*******************************************************************************/
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extern BOOLEAN btc_media_task_aa_rx_flush_req(void);
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/*******************************************************************************
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**
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** Function btc_media_task_aa_tx_flush_req
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**
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** Description Request to flush audio encoding pipe
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**
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** Returns TRUE is success
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**
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*******************************************************************************/
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extern BOOLEAN btc_media_task_aa_tx_flush_req(void);
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/*******************************************************************************
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**
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** Function btc_media_aa_readbuf
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**
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** Description Read an audio GKI buffer from the BTC media TX queue
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**
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** Returns pointer on a GKI aa buffer ready to send
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**
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*******************************************************************************/
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extern BT_HDR *btc_media_aa_readbuf(void);
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/*******************************************************************************
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**
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** Function btc_media_sink_enque_buf
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**
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** Description This function is called by the av_co to fill A2DP Sink Queue
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**
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**
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** Returns size of the queue
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*******************************************************************************/
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UINT8 btc_media_sink_enque_buf(BT_HDR *p_buf);
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/*******************************************************************************
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**
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** Function btc_media_aa_writebuf
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**
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** Description Enqueue a Advance Audio media GKI buffer to be processed by btc media task.
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**
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** Returns TRUE is success
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**
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*******************************************************************************/
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extern void btc_media_aa_writebuf(BT_HDR *pBuf, UINT32 timestamp, UINT16 seq_num);
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/*******************************************************************************
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**
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** Function btc_media_av_writebuf
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**
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** Description Enqueue a video media GKI buffer to be processed by btc media task.
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**
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** Returns TRUE is success
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**
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*******************************************************************************/
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extern BOOLEAN btc_media_av_writebuf(UINT8 *p_media, UINT32 media_len,
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UINT32 timestamp, UINT16 seq_num);
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#if (BTA_AV_INCLUDED == TRUE)
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/*******************************************************************************
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**
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** Function btc_media_task_audio_feeding_init_req
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**
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** Description Request to initialize audio feeding
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**
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** Returns TRUE is success
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**
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*******************************************************************************/
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extern BOOLEAN btc_media_task_audio_feeding_init_req(tBTC_MEDIA_INIT_AUDIO_FEEDING *p_msg);
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#endif
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/*******************************************************************************
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**
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** Function dump_codec_info
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**
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** Description Decode and display codec_info (for debug)
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**
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** Returns void
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**
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*******************************************************************************/
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extern void dump_codec_info(unsigned char *p_codec);
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/**
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* Local adaptation helper functions between btc and media task
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*/
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bool btc_a2dp_start_media_task(void);
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void btc_a2dp_stop_media_task(void);
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void btc_a2dp_on_init(void);
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void btc_a2dp_setup_codec(void);
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void btc_a2dp_on_idle(void);
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BOOLEAN btc_a2dp_on_started(tBTA_AV_START *p_av, BOOLEAN pending_start);
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void btc_a2dp_on_stop_req(void);
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void btc_a2dp_on_stopped(tBTA_AV_SUSPEND *p_av);
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void btc_a2dp_on_suspend(void);
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void btc_a2dp_on_suspended(tBTA_AV_SUSPEND *p_av);
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void btc_a2dp_set_rx_flush(BOOLEAN enable);
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void btc_media_check_iop_exceptions(UINT8 *peer_bda);
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void btc_reset_decoder(UINT8 *p_av);
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int btc_a2dp_get_track_frequency(UINT8 frequency);
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int btc_a2dp_get_track_channel_count(UINT8 channeltype);
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void btc_a2dp_set_peer_sep(UINT8 sep);
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#endif ///BTA_AV_INCLUDED == TRUE
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#endif
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