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/******************************************************************************
*
* Copyright (C) 2004-2012 Broadcom Corporation
*
* 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.
*
******************************************************************************/
/******************************************************************************
*
* This is the interface to utility functions for dealing with SBC data
* frames and codec capabilities.
*
******************************************************************************/
#ifndef BTA_AV_SBC_H
#define BTA_AV_SBC_H
/*****************************************************************************
** constants
*****************************************************************************/
/* SBC packet header size */
#define BTA_AV_SBC_HDR_SIZE A2D_SBC_MPL_HDR_LEN
/*******************************************************************************
**
** Function bta_av_sbc_init_up_sample
**
** Description initialize the up sample
**
** src_sps: samples per second (source audio data)
** dst_sps: samples per second (converted audio data)
** bits: number of bits per pcm sample
** n_channels: number of channels (i.e. mono(1), stereo(2)...)
**
** Returns none
**
*******************************************************************************/
extern void bta_av_sbc_init_up_sample (UINT32 src_sps, UINT32 dst_sps,
UINT16 bits, UINT16 n_channels);
/*******************************************************************************
**
** Function bta_av_sbc_up_sample
**
** Description Given the source (p_src) audio data and
** source speed (src_sps, samples per second),
** This function converts it to audio data in the desired format
**
** p_src: the data buffer that holds the source audio data
** p_dst: the data buffer to hold the converted audio data
** src_samples: The number of source samples (number of bytes)
** dst_samples: The size of p_dst (number of bytes)
**
** Note: An AE reported an issue with this function.
** When called with bta_av_sbc_up_sample(src, uint8_array_dst..)
** the byte before uint8_array_dst may get overwritten.
** Using uint16_array_dst avoids the problem.
** This issue is related to endian-ness and is hard to resolve
** in a generic manner.
** **************** Please use uint16 array as dst.
**
** Returns The number of bytes used in p_dst
** The number of bytes used in p_src (in *p_ret)
**
*******************************************************************************/
extern int bta_av_sbc_up_sample (void *p_src, void *p_dst,
UINT32 src_samples, UINT32 dst_samples,
UINT32 *p_ret);
/*******************************************************************************
**
** Function bta_av_sbc_up_sample_16s (16bits-stereo)
**
** Description Given the source (p_src) audio data and
** source speed (src_sps, samples per second),
** This function converts it to audio data in the desired format
**
** p_src: the data buffer that holds the source audio data
** p_dst: the data buffer to hold the converted audio data
** src_samples: The number of source samples (in uint of 4 bytes)
** dst_samples: The size of p_dst (in uint of 4 bytes)
**
** Returns The number of bytes used in p_dst
** The number of bytes used in p_src (in *p_ret)
**
*******************************************************************************/
extern int bta_av_sbc_up_sample_16s (void *p_src, void *p_dst,
UINT32 src_samples, UINT32 dst_samples,
UINT32 *p_ret);
/*******************************************************************************
**
** Function bta_av_sbc_up_sample_16m (16bits-mono)
**
** Description Given the source (p_src) audio data and
** source speed (src_sps, samples per second),
** This function converts it to audio data in the desired format
**
** p_src: the data buffer that holds the source audio data
** p_dst: the data buffer to hold the converted audio data
** src_samples: The number of source samples (in uint of 2 bytes)
** dst_samples: The size of p_dst (in uint of 2 bytes)
**
** Returns The number of bytes used in p_dst
** The number of bytes used in p_src (in *p_ret)
**
*******************************************************************************/
extern int bta_av_sbc_up_sample_16m (void *p_src, void *p_dst,
UINT32 src_samples, UINT32 dst_samples,
UINT32 *p_ret);
/*******************************************************************************
**
** Function bta_av_sbc_up_sample_8s (8bits-stereo)
**
** Description Given the source (p_src) audio data and
** source speed (src_sps, samples per second),
** This function converts it to audio data in the desired format
**
** p_src: the data buffer that holds the source audio data
** p_dst: the data buffer to hold the converted audio data
** src_samples: The number of source samples (in uint of 2 bytes)
** dst_samples: The size of p_dst (in uint of 2 bytes)
**
** Returns The number of bytes used in p_dst
** The number of bytes used in p_src (in *p_ret)
**
*******************************************************************************/
extern int bta_av_sbc_up_sample_8s (void *p_src, void *p_dst,
UINT32 src_samples, UINT32 dst_samples,
UINT32 *p_ret);
/*******************************************************************************
**
** Function bta_av_sbc_up_sample_8m (8bits-mono)
**
** Description Given the source (p_src) audio data and
** source speed (src_sps, samples per second),
** This function converts it to audio data in the desired format
**
** p_src: the data buffer that holds the source audio data
** p_dst: the data buffer to hold the converted audio data
** src_samples: The number of source samples (number of bytes)
** dst_samples: The size of p_dst (number of bytes)
**
** Returns The number of bytes used in p_dst
** The number of bytes used in p_src (in *p_ret)
**
*******************************************************************************/
extern int bta_av_sbc_up_sample_8m (void *p_src, void *p_dst,
UINT32 src_samples, UINT32 dst_samples,
UINT32 *p_ret);
/*******************************************************************************
**
** Function bta_av_sbc_cfg_for_cap
**
** Description Determine the preferred SBC codec configuration for the
** given codec capabilities. The function is passed the
** preferred codec configuration and the peer codec
** capabilities for the stream. The function attempts to
** match the preferred capabilities with the configuration
** as best it can. The resulting codec configuration is
** returned in the same memory used for the capabilities.
**
** Returns 0 if ok, nonzero if error.
** Codec configuration in p_cap.
**
*******************************************************************************/
extern UINT8 bta_av_sbc_cfg_for_cap(UINT8 *p_peer, tA2D_SBC_CIE *p_cap, tA2D_SBC_CIE *p_pref);
/*******************************************************************************
**
** Function bta_av_sbc_cfg_in_cap
**
** Description This function checks whether an SBC codec configuration
** is allowable for the given codec capabilities.
**
** Returns 0 if ok, nonzero if error.
**
*******************************************************************************/
extern UINT8 bta_av_sbc_cfg_in_cap(UINT8 *p_cfg, tA2D_SBC_CIE *p_cap);
/*******************************************************************************
**
** Function bta_av_sbc_bld_hdr
**
** Description This function builds the packet header for MPF1.
**
** Returns void
**
*******************************************************************************/
extern void bta_av_sbc_bld_hdr(BT_HDR *p_buf, UINT16 fr_per_pkt);
#endif /* BTA_AV_SBC_H */
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