libPCM.codecs

Members

Aliases

CommonDecoderFuncPtr

alias CommonDecoderFuncPtr = short function(ubyte* inputStream, DecoderWorkpad* workpad)

Alias for function pointer for codec interchangeability

Functions

blockDecodeXAADPCM

void blockDecodeXAADPCM(ubyte* inputStream, short* outputStream, int channels, XAADPCMDecoderWorkpad* workpad)

Decodes a whole block of XA ADPCM, which outputs (8-channels)*28 samples for each channel.

blockEncodeXAADPCM

void blockEncodeXAADPCM(short* inputStream, ubyte* outputStream, int channels, XAADPCMEncoderWorkpad* workpad, bool vl)

Encodes a block of 16 bit PCM stream into XA ADPCM.

decodeStream8BitPCMUnsigned

void decodeStream8BitPCMUnsigned(ubyte* inputStream, short* outputStream, uint length)

Decodes a preexisting stream automatically.

decodeStreamALawPCM

void decodeStreamALawPCM(ubyte* inputStream, short* outputStream, uint length)

Decodes a preexisting stream automatically.

decodeStreamDialogicADPCM

void decodeStreamDialogicADPCM(ubyte* inputStream, short* outputStream, uint length)

Decodes a preexisting stream automatically.

decodeStreamIMAADPCM

void decodeStreamIMAADPCM(ubyte* inputStream, short* outputStream, uint length)

Decodes a preexisting stream automatically.

decodeStreamMuLawPCM

void decodeStreamMuLawPCM(ubyte* inputStream, short* outputStream, uint length)

Decodes a preexisting stream automatically.

decodeStreamXAADPCM

void decodeStreamXAADPCM(ubyte* inputStream, short* outputStream, uint length, int channels)

Decodes a preexisting stream automatically.

decodeStreamYamahaADPCMA

void decodeStreamYamahaADPCMA(ubyte* inputStream, short* outputStream, uint length)

Decodes a preexisting stream automatically.

dynamicDecode12BitPCMSigned

short dynamicDecode12BitPCMSigned(ubyte* inputStream, DecoderWorkpad* workpad)

Undocumented in source. Be warned that the author may not have intended to support it.

dynamicDecode12BitPCMUnsigned

short dynamicDecode12BitPCMUnsigned(ubyte* inputStream, DecoderWorkpad* workpad)

Undocumented in source. Be warned that the author may not have intended to support it.

dynamicDecode8BitPCMUnsigned

short dynamicDecode8BitPCMUnsigned(ubyte* inputStream, DecoderWorkpad* workpad)

Appends 8 bit unsigned PCM to 16 bit signed PCM. Workpad is 16 bytes long.

dynamicDecodeALawPCM

short dynamicDecodeALawPCM(ubyte* inputStream, DecoderWorkpad* workpad)

Dinamically decodes an A-Law stream

dynamicDecodeDialogicADPCM

short dynamicDecodeDialogicADPCM(ubyte* inputStream, DecoderWorkpad* workpad)

Dinamically decodes an Dialogic ADPCM stream.

dynamicDecodeIMAADPCM

short dynamicDecodeIMAADPCM(ubyte* inputStream, DecoderWorkpad* workpad)

Dinamically decodes an IMA ADPCM stream.

dynamicDecodeMuLawPCM

short dynamicDecodeMuLawPCM(ubyte* inputStream, DecoderWorkpad* workpad)

Dinamically decodes a Mu-Law stream

dynamicDecodeYamahaADPCMA

short dynamicDecodeYamahaADPCMA(ubyte* inputStream, DecoderWorkpad* workpad)

Dynamically decodes a Yamaha ADPCM A stream. Workpad is 16 bytes long.

dynamicEncode8BitPCMUnsigned

void dynamicEncode8BitPCMUnsigned(short* inputStream, ubyte* outputStream, void* workpad)

Dinamically encodes 16 bit stream into 8 bit. Workpad is 32 bytes long, inputStream and outputStream always points to the first byte.

dynamicEncodeALawPCM

void dynamicEncodeALawPCM(short* inputStream, ubyte* outputStream, EncoderWorkpad* workpad)

Dinamically encodes a stream with A-Law PCM.

dynamicEncodeDialogicADPCM

void dynamicEncodeDialogicADPCM(short* inputStream, ubyte* outputStream, EncoderWorkpad* workpad)

Dinamically encodes a stream with Dialogic ADPCM. Workpad is 32 bytes long, inputStream and outputStream always points to the first byte.

dynamicEncodeIMAADPCM

void dynamicEncodeIMAADPCM(short* inputStream, ubyte* outputStream, EncoderWorkpad* workpad)

Dinamically encodes a stream with IMA ADPCM. Workpad is 32 bytes long, inputStream and outputStream always points to the first byte.

dynamicEncodeMuLawPCM

void dynamicEncodeMuLawPCM(short* inputStream, ubyte* outputStream, EncoderWorkpad* workpad)

Dinamically encodes a stream with Mu-Law PCM.

dynamicEncodeYamahaADPCMA

void dynamicEncodeYamahaADPCMA(short* inputStream, ubyte* outputStream, EncoderWorkpad* workpad)

Dinamically encodes a stream with Yamaha ADPCM A. Workpad is 32 bytes long, inputStream and outputStream always points to the first byte.

encodeStream8BitPCMUnsigned

void encodeStream8BitPCMUnsigned(short* inputStream, ubyte* outputStream, uint length)

Encodes a preexisting stream automatically.

encodeStreamALawPCM

void encodeStreamALawPCM(short* inputStream, ubyte* outputStream, uint length)

Encodes a preexisting stream automatically.

encodeStreamDialogicADPCM

void encodeStreamDialogicADPCM(short* inputStream, ubyte* outputStream, uint length)

Encodes a preexisting stream automatically.

encodeStreamIMAADPCM

void encodeStreamIMAADPCM(short* inputStream, ubyte* outputStream, uint length)

Encodes a preexisting stream automatically.

encodeStreamMuLawPCM

void encodeStreamMuLawPCM(short* inputStream, ubyte* outputStream, uint length)

Encodes a preexisting stream automatically.

encodeStreamXAADPCM

void encodeStreamXAADPCM(short* inputStream, ubyte* outputStream, uint length, int channels)

Encodes a stream of XA ADPCM automatically with multi-channel support

encodeStreamYamahaADPCMA

void encodeStreamYamahaADPCMA(short* inputStream, ubyte* outputStream, uint length)

Encodes a preexisting stream automatically.

encodeXAADPCM

double encodeXAADPCM(int unit, XAADPCMEncoderWorkpad* workpad, byte[2] inputCoEff, short* inputStream, ubyte* outputStream, int iostep, int channels, bool vl)

Encodes a unit of XA ADPCM

initializeDialogicADPCMDecoderWorkpad

DecoderWorkpad initializeDialogicADPCMDecoderWorkpad()

Initializes the index at 16 for Dialogic ADPCM codecs.

initializeDialogicADPCMEncoderWorkpad

EncoderWorkpad initializeDialogicADPCMEncoderWorkpad()

Initializes the index at 16 for Dialogic ADPCM codecs.

unitDecodeXAADPCM

void unitDecodeXAADPCM(ubyte* inputStream, short* outputStream, int channels, XAADPCMDecoderWorkpad* workpad, int filter, int shift, int unit)

Decodes a single unit of XA ADPCM.

Static variables

ADPCM_IndexTable

byte[16] ADPCM_IndexTable;

For IMA and Dialogic ADPCM

ADPCM_IndexTable_2Bit

byte[4] ADPCM_IndexTable_2Bit;

Very rare, mostly experimental Very low quality

ADPCM_IndexTable_3Bit

byte[8] ADPCM_IndexTable_3Bit;

Very rare, mostly experimental

ADPCM_IndexTable_5Bit

byte[32] ADPCM_IndexTable_5Bit;

Very rare, mostly experimental Supposedly has better quality sound than 4bit implementations.

A_Law_DecodeTable

short[256] A_Law_DecodeTable;

Undocumented in source.

A_Law_EncodeTable

ubyte[128] A_Law_EncodeTable;

Undocumented in source.

DIALOGIC_ADPCM_StepTable

ushort[49] DIALOGIC_ADPCM_StepTable;

Most OKI and Yamaha chips seems to use this step-table

IMA_ADPCM_StepTable

ushort[89] IMA_ADPCM_StepTable;

Most common ADPCM steptable

MU_Law_DecodeTable

short[256] MU_Law_DecodeTable;

Undocumented in source.

MU_Law_EncodeTable

ubyte[256] MU_Law_EncodeTable;

Undocumented in source.

XA_ADPCM_Table

byte[2][5] XA_ADPCM_Table;

Undocumented in source.

Yamaha_ADPCM_A_IndexTable

byte[16] Yamaha_ADPCM_A_IndexTable;

For the Yamaha ADPCM A found in YM2610 and probably other chips

Yamaha_ADPCM_DiffLookup

byte[16] Yamaha_ADPCM_DiffLookup;

Used rarely, couldn't find more info about this codec

Yamaha_ADPCM_IndexScale

ushort[16] Yamaha_ADPCM_IndexScale;

Undocumented in source.

Structs

ADPCMDataPacket3Bit

struct ADPCMDataPacket3Bit

For easy access of 3bit ADPCM nibbles

ADPCMDataPacket5Bit

struct ADPCMDataPacket5Bit

For easy access of 5bit ADPCM nibbles

DecoderWorkpad

struct DecoderWorkpad

A note on workpads: Dynamic decode functions use 16 bytes of workpad, consisting of 4 32 bit integers, which is the recommended initialization method to avoid misaligned integers. For looping an audio sample, you need to back up the workpad at the start of the loop, monitor the third integer (which is the position), then replace the current workpad's data with the backed up one. This is extremly important with ADPCM as they depend on many local values. Dynamic encode functions use 32 bytes. In these cases, the 3rd and 6th integers need to be set to zero if working on a fixed length buffer. Functions meant to be used on a fixed length buffer coming soon.

EncoderWorkpad

struct EncoderWorkpad

Undocumented in source.

XAADPCMDecoderWorkpad

struct XAADPCMDecoderWorkpad

Workpad for XA ADPCM decoders

XAADPCMEncoderWorkpad

struct XAADPCMEncoderWorkpad

Keeper values fo XAADPCM encoding.

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