static void VOC_GetNextDataBlock(SAMPLE_AUDIO_STREAM *pAudioStream)
{
VOC_BLOCK_HEADER VocBlockHeader;
VOC_AUDIO_STREAM *pVocAudioStream = &VocAudioStream;
/* read header */
Sample_ReadData(pAudioStream,(unsigned char *)&VocBlockHeader, sizeof(VOC_BLOCK_HEADER));
pVocAudioStream->CurrentBlockOffset = 0;
if (VocBlockHeader.ID!=0)
{
unsigned long BlockSize;
BlockSize = VOC_GetBlockSize(&VocBlockHeader);
switch (VocBlockHeader.ID)
{
/* sample data */
case 9:
{
VOC_BLOCK9_HEADER Block9Header;
Sample_ReadData(pAudioStream, (unsigned char *)&Block9Header, sizeof(VOC_BLOCK9_HEADER));
pVocAudioStream->CurrentBlockSize = BlockSize - sizeof(VOC_BLOCK9_HEADER);
#ifdef CPC_LSB_FIRST
pAudioStream->SampleFrequency = Block9Header.SampleFrequency;
#else
pAudioStream->SampleFrequency = SwapEndianWord(Block9Header.SampleFrequency);
#endif
pAudioStream->SampleBits = Block9Header.BitsPerSample;
pAudioStream->SampleChannels = Block9Header.NoOfChannels;
}
break;
case 1:
{
VOC_BLOCK1_HEADER Block1Header;
Sample_ReadData(pAudioStream, (unsigned char *)&Block1Header, sizeof(VOC_BLOCK1_HEADER));
pVocAudioStream->CurrentBlockSize = BlockSize - sizeof(VOC_BLOCK1_HEADER);
if (Block1Header.CompressionType==0)
{
pAudioStream->SampleBits = 8;
pAudioStream->SampleChannels = 1;
}
pAudioStream->SampleFrequency = VOC_SampleRateToFrequency(Block1Header.SampleRate);
}
break;
/* data block */
case 2:
{
pVocAudioStream->CurrentBlockSize = BlockSize;
}
break;
/* silence block */
case 3:
{
pVocAudioStream->Flags |= VOC_AUDIO_STREAM_FLAGS_SILENCE_ACTIVE;
}
break;
/* start repeat */
case 6:
{
int RepeatCount;
VOC_BLOCK6_HEADER Block6Header;
Sample_ReadData(pAudioStream, (unsigned char *)&Block6Header, sizeof(VOC_BLOCK6_HEADER));
#ifdef CPC_LSB_FIRST
RepeatCount = Block6Header.RepeatCount;
#else
RepeatCount = SwapEndianWord(Block6Header.RepeatCount);
#endif
if (RepeatCount==0x0ffff)
{
pVocAudioStream->Flags |= VOC_AUDIO_STREAM_FLAGS_REPEAT_INFINITE;
}
else
{
pVocAudioStream->RepeatCount = RepeatCount-1;
}
/*(pVocAudioStream->RepeatPosition = Sample_GetPosition(); */
}
break;
/* end repeat */
case 7:
{
BOOL bRepeat = FALSE;
if (pVocAudioStream->Flags & VOC_AUDIO_STREAM_FLAGS_REPEAT_INFINITE)
{
bRepeat = TRUE;
}
else
{
/* update repeat count */
pVocAudioStream->RepeatCount--;
if (pVocAudioStream->RepeatCount!=0)
{
bRepeat = TRUE;
}
}
if (bRepeat)
{
/* Sample_SetPosition(pVocAudioStream->RepeatPosition); */
}
}
break;
default:
{
}
break;
}
}
}
/* setup header */
void YMOutput_GenerateHeaderData(unsigned char *pData, int nVersion, int nVBL)
{
nVersion = YMOutput_ValidateVersion(nVersion);
if (nVersion == 3)
{
memcpy(pData, YM3_Ident_Text, strlen(YM3_Ident_Text));
}
else
{
YM5_HEADER YM5_Header;
memcpy(&YM5_Header.ID, YM5_Ident_Text, 4);
memcpy(&YM5_Header.IDString, YM5_IdentString_Text, 8);
YM5_Header.NumVBL = nVBL;
YM5_Header.SongAttributes = YM5_SONG_ATTRIBUTE_DATA_INTERLEAVED;
YM5_Header.NoOfDigiDrumSamples = 0;
YM5_Header.YMFrequency = 1000000;
YM5_Header.PlayerFrequency = 50;
YM5_Header.VBLLoopIndex = 0;
YM5_Header.SizeOfExtraData = 0;
#ifdef CPC_LSB_FIRST
YM5_Header.NumVBL = SwapEndianLong(YM5_Header.NumVBL);
YM5_Header.SongAttributes = SwapEndianLong(YM5_Header.SongAttributes);
YM5_Header.YMFrequency = SwapEndianLong(YM5_Header.YMFrequency);
YM5_Header.VBLLoopIndex = SwapEndianLong(YM5_Header.VBLLoopIndex);
YM5_Header.NoOfDigiDrumSamples = SwapEndianWord(YM5_Header.NoOfDigiDrumSamples);
YM5_Header.PlayerFrequency = SwapEndianWord(YM5_Header.PlayerFrequency);
YM5_Header.SizeOfExtraData = SwapEndianWord(YM5_Header.SizeOfExtraData);
#endif
memcpy(pData, &YM5_Header,sizeof(YM5_HEADER));
pData+=sizeof(YM5_HEADER);
/* write name of song */
if (YM5_SongName!=NULL)
{
int nStringLen = strlen(YM5_SongName);
memcpy(pData, YM5_SongName, nStringLen);
pData+=nStringLen;
}
pData[0] = '\0';
pData++;
/* write author name */
if (YM5_AuthorName!=NULL)
{
int nStringLen = strlen(YM5_AuthorName);
memcpy(pData, YM5_AuthorName, nStringLen);
pData+=nStringLen;
}
pData[0] = '\0';
pData++;
if (YM5_Comments!=NULL)
{
int nStringLen = strlen(YM5_Comments);
memcpy(pData, YM5_Comments, nStringLen);
pData+=nStringLen;
}
pData[0] = '\0';
pData++;
}
}