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153 lines
2.3 KiB
153 lines
2.3 KiB
#include <windows.h>
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#include <mmsystem.h>
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#include "waveutil.h"
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void CopyFormat
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(
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LPWAVEFORMATEX pwfxDst,
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LPWAVEFORMATEX pwfxSrc
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)
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{
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DWORD cbSize;
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cbSize = SIZEOFFORMAT(pwfxSrc);
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CopyMemory(pwfxDst, pwfxSrc, cbSize);
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}
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void CopyFormatEx
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(
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LPWAVEFORMATEX pwfxDst,
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LPWAVEFORMATEX pwfxSrc
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)
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{
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DWORD cbSize;
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cbSize = SIZEOFFORMATEX(pwfxSrc);
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CopyMemory(pwfxDst, pwfxSrc, cbSize);
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if (WAVE_FORMAT_PCM == pwfxDst->wFormatTag)
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{
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pwfxDst->cbSize = 0;
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}
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}
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BOOL FormatCmp
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(
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LPWAVEFORMATEX pwfx1,
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LPWAVEFORMATEX pwfx2
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)
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{
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DWORD cbSize;
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cbSize = SIZEOFFORMAT(pwfx1);
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if (cbSize != SIZEOFFORMAT(pwfx2))
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{
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return (FALSE);
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}
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else
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{
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LPBYTE pb1 = (LPBYTE)pwfx1, pb2 = (LPBYTE)pwfx2;
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for (; cbSize; cbSize--)
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{
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if (pb1[cbSize - 1] != pb2[cbSize - 1])
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{
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return (FALSE);
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}
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}
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}
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return (TRUE);
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}
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DWORD DeinterleaveBuffers
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(
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LPWAVEFORMATEX pwfx,
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LPBYTE pSrc,
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LPBYTE *ppbDst,
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DWORD cBuffers,
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DWORD cbSrcLength,
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DWORD dwOffset
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)
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{
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DWORD ii;
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// Note: Right now, we don't deal with anything but PCM
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if (WAVE_FORMAT_PCM != pwfx->wFormatTag)
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{
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return (dwOffset);
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}
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if (1 == cBuffers)
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{
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LPBYTE pDst = ppbDst[0];
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pDst += dwOffset;
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CopyMemory(pDst, pSrc, cbSrcLength);
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dwOffset += cbSrcLength;
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return (dwOffset);
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}
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if (8 == pwfx->wBitsPerSample)
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{
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if ( !cBuffers || (0 != (cbSrcLength % cBuffers)) )
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{
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// Hmm... Buffer sizes don't line up!
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return (dwOffset);
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}
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for (; cbSrcLength; cbSrcLength -= cBuffers)
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{
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for (ii = 0; ii < cBuffers; ii++)
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{
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ppbDst[ii][dwOffset] = *pSrc++;
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}
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dwOffset++;
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}
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return (dwOffset);
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}
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else
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{
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PWORD *ppwDst = (PWORD*)ppbDst;
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PWORD pwSrc = (PWORD)pSrc;
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// Assuming 16-bit...
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if ( !cBuffers || (0 != (cbSrcLength % (cBuffers * 2))) || (0 != (dwOffset % sizeof(WORD))))
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{
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// Hmm... Buffer sizes don't line up!
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return (0);
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}
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// Convert byte index into word index
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//
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dwOffset /= sizeof(WORD);
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for (; cbSrcLength; cbSrcLength -= (2 * cBuffers))
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{
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for (ii = 0; ii < cBuffers; ii++)
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{
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ppwDst[ii][dwOffset] = *pwSrc++;
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}
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dwOffset++;
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}
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// Return byte index
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//
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dwOffset *= sizeof(WORD);
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return (dwOffset);
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}
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}
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