wxSoundStream& wxSoundStreamG72X::Write(const void *buffer, wxUint32 len)
{
wxUint16 *old_linear;
register wxUint16 *linear_buffer;
register wxUint32 countdown = len;
register wxUint32 real_len;
// Compute the real length (PCM format) to sendt to the sound card
real_len = (len * m_n_bits / 8);
// Allocate a temporary buffer
old_linear = linear_buffer = new wxUint16[real_len];
// Bad, we override the const
m_io_buffer = (wxUint8 *)buffer;
m_current_b_pos = 0;
// Decode the datas
while (countdown != 0) {
*linear_buffer++ = m_decoder(GetBits(), AUDIO_ENCODING_LINEAR, m_state);
countdown--;
}
m_lastcount = len;
// Send them to the sound card
m_router->Write(old_linear, real_len);
// Destroy the temporary buffer
delete[] old_linear;
return *m_router;
}
bool CG711Codec::DecodeBuf(unsigned char *pInData, unsigned long inLen, unsigned char *pOutData, unsigned long *pOutLen)
{
long sampleNum = inLen;
unsigned short * pOut = (unsigned short *)(pOutData);
for(long i = 0; i < sampleNum; i++)
{
*pOut++ = m_decoder(pInData[i]);
}
*pOutLen = inLen * 2;
return true;
}
