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