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ESP32-audioI2S
Unverified Commit c12a22fd authored by Wolle's avatar Wolle Committed by GitHub
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parent 68ae4c67
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Showing with 83 additions and 87 deletions
src/flac_decoder/flac_decoder.cpp
View file @ c12a22fd
......@@ -186,7 +186,7 @@ char* FLACgetStreamTitle(){
//----------------------------------------------------------------------------------------------------------------------
int FLACparseOggHeader(unsigned char *buf){
uint8_t i = 0;
uint16_t i = 0;
uint8_t ssv = *(buf + i); // stream_structure_version
(void)ssv;
i++;
......@@ -236,7 +236,7 @@ int8_t FLACDecode(uint8_t *inbuf, int *bytesLeft, short *outbuf){
if(m_f_OggS_found == true){
m_f_OggS_found = false;
*bytesLeft -= FLACparseOggHeader(inbuf);
return ERR_FLAC_NONE;
return FLAC_PARSE_OGG_DONE;
}
if(m_status != OUT_SAMPLES){
......@@ -260,94 +260,12 @@ int8_t FLACDecode(uint8_t *inbuf, int *bytesLeft, short *outbuf){
FLACFindStreamTitle(inbuf, m_page0_len);
}
*bytesLeft -= m_page0_len; // can be FLAC or title
return ERR_FLAC_NONE;
return FLAC_PARSE_OGG_DONE;
}
log_i("sync code not found");
return ERR_FLAC_SYNC_CODE_NOT_FOUND;
}
readUint(14 + 1); // synccode + reserved bit
FLACFrameHeader->blockingStrategy = readUint(1);
FLACFrameHeader->blockSizeCode = readUint(4);
FLACFrameHeader->sampleRateCode = readUint(4);
FLACFrameHeader->chanAsgn = readUint(4);
FLACFrameHeader->sampleSizeCode = readUint(3);
if(!FLACMetadataBlock->numChannels){
if(FLACFrameHeader->chanAsgn == 0) FLACMetadataBlock->numChannels = 1;
if(FLACFrameHeader->chanAsgn == 1) FLACMetadataBlock->numChannels = 2;
if(FLACFrameHeader->chanAsgn > 7) FLACMetadataBlock->numChannels = 2;
}
if(FLACMetadataBlock->numChannels < 1) return ERR_FLAC_UNKNOWN_CHANNEL_ASSIGNMENT;
if(!FLACMetadataBlock->bitsPerSample){
if(FLACFrameHeader->sampleSizeCode == 1) FLACMetadataBlock->bitsPerSample = 8;
if(FLACFrameHeader->sampleSizeCode == 2) FLACMetadataBlock->bitsPerSample = 12;
if(FLACFrameHeader->sampleSizeCode == 4) FLACMetadataBlock->bitsPerSample = 16;
if(FLACFrameHeader->sampleSizeCode == 5) FLACMetadataBlock->bitsPerSample = 20;
if(FLACFrameHeader->sampleSizeCode == 6) FLACMetadataBlock->bitsPerSample = 24;
}
if(FLACMetadataBlock->bitsPerSample > 16) return ERR_FLAC_BITS_PER_SAMPLE_TOO_BIG;
if(FLACMetadataBlock->bitsPerSample < 8 ) return ERR_FLAG_BITS_PER_SAMPLE_UNKNOWN;
if(!FLACMetadataBlock->sampleRate){
if(FLACFrameHeader->sampleRateCode == 1) FLACMetadataBlock->sampleRate = 88200;
if(FLACFrameHeader->sampleRateCode == 2) FLACMetadataBlock->sampleRate = 176400;
if(FLACFrameHeader->sampleRateCode == 3) FLACMetadataBlock->sampleRate = 192000;
if(FLACFrameHeader->sampleRateCode == 4) FLACMetadataBlock->sampleRate = 8000;
if(FLACFrameHeader->sampleRateCode == 5) FLACMetadataBlock->sampleRate = 16000;
if(FLACFrameHeader->sampleRateCode == 6) FLACMetadataBlock->sampleRate = 22050;
if(FLACFrameHeader->sampleRateCode == 7) FLACMetadataBlock->sampleRate = 24000;
if(FLACFrameHeader->sampleRateCode == 8) FLACMetadataBlock->sampleRate = 32000;
if(FLACFrameHeader->sampleRateCode == 9) FLACMetadataBlock->sampleRate = 44100;
if(FLACFrameHeader->sampleRateCode == 10) FLACMetadataBlock->sampleRate = 48000;
if(FLACFrameHeader->sampleRateCode == 11) FLACMetadataBlock->sampleRate = 96000;
}
readUint(1);
uint32_t temp = (readUint(8) << 24);
temp = ~temp;
uint32_t shift = 0x80000000; // Number of leading zeros
int8_t count = 0;
for(int i=0; i<32; i++){
if((temp & shift) == 0) {count++; shift >>= 1;}
else break;
}
count--;
for (int i = 0; i < count; i++) readUint(8);
m_blockSize = 0;
if (FLACFrameHeader->blockSizeCode == 1)
m_blockSize = 192;
else if (2 <= FLACFrameHeader->blockSizeCode && FLACFrameHeader->blockSizeCode <= 5)
m_blockSize = 576 << (FLACFrameHeader->blockSizeCode - 2);
else if (FLACFrameHeader->blockSizeCode == 6)
m_blockSize = readUint(8) + 1;
else if (FLACFrameHeader->blockSizeCode == 7)
m_blockSize = readUint(16) + 1;
else if (8 <= FLACFrameHeader->blockSizeCode && FLACFrameHeader->blockSizeCode <= 15)
m_blockSize = 256 << (FLACFrameHeader->blockSizeCode - 8);
else{
return ERR_FLAC_RESERVED_BLOCKSIZE_UNSUPPORTED;
}
if(m_blockSize > 8192){
log_e("Error: blockSize too big");
return ERR_FLAC_BLOCKSIZE_TOO_BIG;
}
if(FLACFrameHeader->sampleRateCode == 12)
readUint(8);
else if (FLACFrameHeader->sampleRateCode == 13 || FLACFrameHeader->sampleRateCode == 14){
readUint(16);
}
readUint(8);
m_status = DECODE_SUBFRAMES;
*bytesLeft = m_bytesAvail;
m_blockSizeLeft = m_blockSize;
return ERR_FLAC_NONE;
return flacDecodeFrame(inbuf, bytesLeft, outbuf);
}
if(m_status == DECODE_SUBFRAMES){
......@@ -394,6 +312,82 @@ int8_t FLACDecode(uint8_t *inbuf, int *bytesLeft, short *outbuf){
return ERR_FLAC_NONE;
}
//----------------------------------------------------------------------------------------------------------------------
int8_t flacDecodeFrame(uint8_t *inbuf, int *bytesLeft, short *outbuf){
readUint(14 + 1); // synccode + reserved bit
FLACFrameHeader->blockingStrategy = readUint(1);
FLACFrameHeader->blockSizeCode = readUint(4);
FLACFrameHeader->sampleRateCode = readUint(4);
FLACFrameHeader->chanAsgn = readUint(4);
FLACFrameHeader->sampleSizeCode = readUint(3);
if(!FLACMetadataBlock->numChannels){
if(FLACFrameHeader->chanAsgn == 0) FLACMetadataBlock->numChannels = 1;
if(FLACFrameHeader->chanAsgn == 1) FLACMetadataBlock->numChannels = 2;
if(FLACFrameHeader->chanAsgn > 7) FLACMetadataBlock->numChannels = 2;
}
if(FLACMetadataBlock->numChannels < 1) return ERR_FLAC_UNKNOWN_CHANNEL_ASSIGNMENT;
if(!FLACMetadataBlock->bitsPerSample){
if(FLACFrameHeader->sampleSizeCode == 1) FLACMetadataBlock->bitsPerSample = 8;
if(FLACFrameHeader->sampleSizeCode == 2) FLACMetadataBlock->bitsPerSample = 12;
if(FLACFrameHeader->sampleSizeCode == 4) FLACMetadataBlock->bitsPerSample = 16;
if(FLACFrameHeader->sampleSizeCode == 5) FLACMetadataBlock->bitsPerSample = 20;
if(FLACFrameHeader->sampleSizeCode == 6) FLACMetadataBlock->bitsPerSample = 24;
}
if(FLACMetadataBlock->bitsPerSample > 16) return ERR_FLAC_BITS_PER_SAMPLE_TOO_BIG;
if(FLACMetadataBlock->bitsPerSample < 8 ) return ERR_FLAG_BITS_PER_SAMPLE_UNKNOWN;
if(!FLACMetadataBlock->sampleRate){
if(FLACFrameHeader->sampleRateCode == 1) FLACMetadataBlock->sampleRate = 88200;
if(FLACFrameHeader->sampleRateCode == 2) FLACMetadataBlock->sampleRate = 176400;
if(FLACFrameHeader->sampleRateCode == 3) FLACMetadataBlock->sampleRate = 192000;
if(FLACFrameHeader->sampleRateCode == 4) FLACMetadataBlock->sampleRate = 8000;
if(FLACFrameHeader->sampleRateCode == 5) FLACMetadataBlock->sampleRate = 16000;
if(FLACFrameHeader->sampleRateCode == 6) FLACMetadataBlock->sampleRate = 22050;
if(FLACFrameHeader->sampleRateCode == 7) FLACMetadataBlock->sampleRate = 24000;
if(FLACFrameHeader->sampleRateCode == 8) FLACMetadataBlock->sampleRate = 32000;
if(FLACFrameHeader->sampleRateCode == 9) FLACMetadataBlock->sampleRate = 44100;
if(FLACFrameHeader->sampleRateCode == 10) FLACMetadataBlock->sampleRate = 48000;
if(FLACFrameHeader->sampleRateCode == 11) FLACMetadataBlock->sampleRate = 96000;
}
readUint(1);
uint32_t temp = (readUint(8) << 24);
temp = ~temp;
uint32_t shift = 0x80000000; // Number of leading zeros
int8_t count = 0;
for(int i=0; i<32; i++){
if((temp & shift) == 0) {count++; shift >>= 1;}
else break;
}
count--;
for (int i = 0; i < count; i++) readUint(8);
m_blockSize = 0;
if (FLACFrameHeader->blockSizeCode == 1)
m_blockSize = 192;
else if (2 <= FLACFrameHeader->blockSizeCode && FLACFrameHeader->blockSizeCode <= 5)
m_blockSize = 576 << (FLACFrameHeader->blockSizeCode - 2);
else if (FLACFrameHeader->blockSizeCode == 6)
m_blockSize = readUint(8) + 1;
else if (FLACFrameHeader->blockSizeCode == 7)
m_blockSize = readUint(16) + 1;
else if (8 <= FLACFrameHeader->blockSizeCode && FLACFrameHeader->blockSizeCode <= 15)
m_blockSize = 256 << (FLACFrameHeader->blockSizeCode - 8);
else{
return ERR_FLAC_RESERVED_BLOCKSIZE_UNSUPPORTED;
}
if(m_blockSize > 8192){
log_e("Error: blockSize too big");
return ERR_FLAC_BLOCKSIZE_TOO_BIG;
}
if(FLACFrameHeader->sampleRateCode == 12)
readUint(8);
else if (FLACFrameHeader->sampleRateCode == 13 || FLACFrameHeader->sampleRateCode == 14){
readUint(16);
}
readUint(8);
m_status = DECODE_SUBFRAMES;
*bytesLeft = m_bytesAvail;
m_blockSizeLeft = m_blockSize;
return ERR_FLAC_NONE;
}
//----------------------------------------------------------------------------------------------------------------------
uint16_t FLACGetOutputSamps(){
int vs = m_validSamples;
m_validSamples=0;
......
src/flac_decoder/flac_decoder.h
View file @ c12a22fd
......@@ -27,7 +27,8 @@ typedef struct FLACsubFramesBuff_t{
enum : uint8_t {FLACDECODER_INIT, FLACDECODER_READ_IN, FLACDECODER_WRITE_OUT};
enum : uint8_t {DECODE_FRAME, DECODE_SUBFRAMES, OUT_SAMPLES};
enum : int8_t {GIVE_NEXT_LOOP = +1,
enum : int8_t {FLAC_PARSE_OGG_DONE = 100,
GIVE_NEXT_LOOP = +1,
ERR_FLAC_NONE = 0,
ERR_FLAC_BLOCKSIZE_TOO_BIG = -1,
ERR_FLAC_RESERVED_BLOCKSIZE_UNSUPPORTED = -2,
......@@ -153,6 +154,7 @@ void FLACDecoder_FreeBuffers();
void FLACSetRawBlockParams(uint8_t Chans, uint32_t SampRate, uint8_t BPS, uint32_t tsis, uint32_t AuDaLength);
void FLACDecoderReset();
int8_t FLACDecode(uint8_t *inbuf, int *bytesLeft, short *outbuf);
int8_t flacDecodeFrame(uint8_t *inbuf, int *bytesLeft, short *outbuf);
uint16_t FLACGetOutputSamps();
uint64_t FLACGetTotoalSamplesInStream();
uint8_t FLACGetBitsPerSample();
......
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