msadp32: MSDN suggests "wfx.nBlockAlign * 2 / wfx.nChannels - 12" as the formula…

msadp32: MSDN suggests "wfx.nBlockAlign * 2 / wfx.nChannels - 12" as the formula for calculating wSamplesPerBlock.

msadp32: MSDN suggests "wfx.nBlockAlign * 2 / wfx.nChannels - 12" as the formula…
d6ae9f88 · Stefano Guidoni · Alexandre Julliard · 279e797c · d6ae9f88
Commit d6ae9f88 authored Feb 09, 2009 by Stefano Guidoni Committed by Alexandre Julliard Feb 11, 2009
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msadp32.c dlls/msadp32.acm/msadp32.c +1 -1

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--- a/dlls/msadp32.acm/msadp32.c
+++ b/dlls/msadp32.acm/msadp32.c
@@ -171,7 +171,7 @@ static void     init_wfx_adpcm(ADPCMWAVEFORMAT* awfx)
    pwfx->cbSize = 2 * sizeof(WORD) + 7 * sizeof(ADPCMCOEFSET);
    /* 7 is the size of the block head (which contains two samples) */

-    awfx->wSamplesPerBlock = (pwfx->nBlockAlign - (7 * pwfx->nChannels)) * (2 / pwfx->nChannels) + 2;
+    awfx->wSamplesPerBlock = pwfx->nBlockAlign * 2 / pwfx->nChannels - 12;
    pwfx->nAvgBytesPerSec = (pwfx->nSamplesPerSec * pwfx->nBlockAlign) / awfx->wSamplesPerBlock;
    awfx->wNumCoef = 7;
    memcpy(awfx->aCoef, MSADPCM_CoeffSet, 7 * sizeof(ADPCMCOEFSET));