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component/bt: modify the SBC decoder to support mSBC mode

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This commit is contained in:
baohongde 2019-04-15 14:54:29 +08:00
parent 7c28611a3d
commit e10d5aaddc
3 changed files with 31 additions and 5 deletions
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1
components/bt/bluedroid/external/sbc/decoder/include/oi_codec_sbc.h vendored
View File

@ -76,6 +76,7 @@ Declarations of codec functions, data types, and macros.
#define OI_SBC_SYNCWORD 0x9c
#define OI_SBC_ENHANCED_SYNCWORD 0x9d
#define OI_mSBC_SYNCWORD 0xad
/**@name Sampling frequencies */
/**@{*/

31
components/bt/bluedroid/external/sbc/decoder/srce/decoder-private.c vendored
View File

@ -81,9 +81,6 @@ INLINE OI_STATUS internal_DecoderReset(OI_CODEC_SBC_DECODER_CONTEXT *context,
return OI_OK;
}
/**
* Read the SBC header up to but not including the joint stereo mask. The syncword has already been
* examined, and the enhanced mode flag set, by FindSyncword.
@ -94,7 +91,33 @@ INLINE void OI_SBC_ReadHeader(OI_CODEC_SBC_COMMON_CONTEXT *common, const OI_BYTE
OI_UINT8 d1;
OI_ASSERT(data[0] == OI_SBC_SYNCWORD || data[0] == OI_SBC_ENHANCED_SYNCWORD);
OI_ASSERT(data[0] == OI_SBC_SYNCWORD || data[0] == OI_SBC_ENHANCED_SYNCWORD
|| data[0] == OI_mSBC_SYNCWORD);
/**
* For mSBC, just set those parameters
*/
if (data[0] == OI_mSBC_SYNCWORD){
frame->freqIndex = 0;
frame->frequency = 16000;
frame->blocks = 4;
frame->nrof_blocks = 15;
frame->mode = 0;
frame->nrof_channels = 1;
frame->alloc = SBC_LOUDNESS;
frame->subbands = 1;
frame->nrof_subbands = 8;
frame->cachedInfo = 0;
frame->bitpool = 26;
frame->crc = data[3];
return;
}
/* Avoid filling out all these strucutures if we already remember the values
* from last time. Just in case we get a stream corresponding to data[1] ==

4
components/bt/bluedroid/external/sbc/decoder/srce/decoder-sbc.c vendored
View File

@ -79,7 +79,9 @@ PRIVATE OI_STATUS FindSyncword(OI_CODEC_SBC_DECODER_CONTEXT *context,
return OI_CODEC_SBC_NO_SYNCWORD;
}
#else // SBC_ENHANCED
while (*frameBytes && (**frameData != OI_SBC_SYNCWORD)) {
while (*frameBytes && (**frameData != OI_SBC_SYNCWORD)
&& (**frameData != OI_mSBC_SYNCWORD)) {
(*frameBytes)--;
(*frameData)++;
}