Hi,
I downloaded Intel IPP and now I'm trying to use it for decoding ADPCM32.
As I understood from the manual, the way I should do it is the following:
1. Invoke ippStaticInit() at the start of my program.
2. Invoke ippsDecodeGetStateSize_G726_8u16s (&decSize), where decSize is an unsigned integer.
3. Allocate [decSize] bytes of memory for storing the decoder state, in the following way:
m_pDecMem = (IppsDecoderState_G726_16s*)malloc(decSize);
where pDecMem is a variable of type IppsDecoderState_G726_16s*
4. Invoke ippsDecodeInit_G726_8u16s(m_pDecMem, IPP_SPCHBR_32000, IPP_PCM_LINEAR) to init the G726 decoder.
5. Every time I should decode an ADPCM32 buffer, I should invoke the following command:
ippsDecode_G726_8u16s(m_pDecMem, audio, (Ipp16s *)linearBuffer, numOfBytes);
Where audio is the ADPCM32 encoded buffer, linearBuffer is the decoded audio (in pcm linear format) and numOfBytes is the size of the audio in ADPCM32 format.
But when I play the decoded audio, all I get is noise, although I have another ADPCM32 decoder that succeeds to decode the same buffers (although with bad quality).
Am I doing something wrong?
Thanks
