/*********************************************************************************
* Close WAV file.
* Update chunk sizes so it can be read by audio applications.
*/
int Audio_WAV_CloseWriter(WAV_Writer *writer) {
unsigned char buffer[4];
unsigned char *bufferPtr;
int numWritten;
int riffSize;
/* Go back to beginning of file and update DATA size */
int result = fseek(writer->fid, writer->dataSizeOffset, SEEK_SET);
if (result < 0)
return result;
bufferPtr = buffer;
WriteLongLE(&bufferPtr, writer->dataSize);
numWritten = fwrite(buffer, 1, sizeof( buffer), writer->fid);
if (numWritten != sizeof(buffer))
return -1;
/* Update RIFF size */
result = fseek(writer->fid, 4, SEEK_SET);
if (result < 0)
return result;
riffSize = writer->dataSize + (WAV_HEADER_SIZE - 8);
bufferPtr = buffer;
WriteLongLE(&bufferPtr, riffSize);
numWritten = fwrite(buffer, 1, sizeof(buffer), writer->fid);
if (numWritten != sizeof(buffer))
return -1;
fclose(writer->fid);
writer->fid = NULL;
return writer->dataSize;
}
void CEDPacket::WriteLongEDString(LPCTSTR psz, BOOL bUnicode)
{
DWORD nLen;
if ( bUnicode )
{
nLen = GetStringLenUTF8( psz );
WriteLongLE( nLen );
WriteStringUTF8( psz, FALSE );
}
else
{
nLen = GetStringLen( psz );
WriteLongLE( nLen );
WriteString( psz, FALSE );
}
ASSERT( nLen <= 0xFFFF );
}
/*********************************************************************************
* Open named file and write WAV header to the file.
* The header includes the DATA chunk type and size.
* Returns number of bytes written to file or negative error code.
*/
int Audio_WAV_OpenWriter(WAV_Writer *writer, const char *fileName, int frameRate, int samplesPerFrame) {
unsigned int bytesPerSecond;
unsigned char header[WAV_HEADER_SIZE];
unsigned char *addr = header;
int numWritten;
writer->dataSize = 0;
writer->dataSizeOffset = 0;
writer->fid = fopen(fileName, "wb");
if (writer->fid == NULL) {
return -1;
}
/* Write RIFF header. */
WriteChunkType(&addr, RIFF_ID);
/* Write RIFF size as zero for now. Will patch later. */
WriteLongLE(&addr, 0);
/* Write WAVE form ID. */
WriteChunkType(&addr, WAVE_ID);
/* Write format chunk based on AudioSample structure. */
WriteChunkType(&addr, FMT_ID);
WriteLongLE(&addr, 16);
WriteShortLE(&addr, WAVE_FORMAT_PCM);
bytesPerSecond = frameRate * samplesPerFrame * sizeof(int16_t);
WriteShortLE(&addr, (int16_t) samplesPerFrame);
WriteLongLE(&addr, frameRate);
WriteLongLE(&addr, bytesPerSecond);
WriteShortLE(&addr, (int16_t) (samplesPerFrame * sizeof(int16_t))); /* bytesPerBlock */
WriteShortLE(&addr, (int16_t) 16); /* bits per sample */
/* Write ID and size for 'data' chunk. */
WriteChunkType(&addr, DATA_ID);
/* Save offset so we can patch it later. */
writer->dataSizeOffset = static_cast<int>(addr - header);
WriteLongLE(&addr, 0);
numWritten = fwrite(header, 1, sizeof(header), writer->fid );
if (numWritten != sizeof(header))
return -1;
return numWritten;
}
