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SB16: fixed audio distortion when playing stereo WAV files (patch by Dawn Teschendorf)

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This commit is contained in:
Volker Ruppert 2014-05-23 21:39:03 +00:00
parent acea38455b
commit aa7db4ba08
1 changed files with 6 additions and 6 deletions
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12
bochs/iodev/sound/sb16.cc
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@ -1247,10 +1247,10 @@ void bx_sb16_c::dsp_dma(Bit8u command, Bit8u mode, Bit16u length, Bit8u comp)
DSP.dma.chunkcount = 0; DSP.dma.chunkcount = 0;
Bit32u sampledatarate = (Bit32u) DSP.dma.samplerate * (Bit32u) DSP.dma.bps; Bit32u sampledatarate = (Bit32u) DSP.dma.samplerate * (Bit32u) DSP.dma.bps;
if ((DSP.dma.bits == 16) && (BX_SB16_DMAH != 0)) { if (DSP.dma.bits == 8 || (DSP.dma.bits == 16 && BX_SB16_DMAH != 0)) {
DSP.dma.count = (DSP.dma.blocklength + 1) * (DSP.dma.bps / 2) - 1; DSP.dma.count = DSP.dma.blocklength;
} else { } else {
DSP.dma.count = (DSP.dma.blocklength + 1) * DSP.dma.bps - 1; DSP.dma.count = ((DSP.dma.blocklength + 1) << 1) - 1;
} }
DSP.dma.timer = BX_SB16_THIS dmatimer * BX_DMA_BUFFER_SIZE / sampledatarate; DSP.dma.timer = BX_SB16_THIS dmatimer * BX_DMA_BUFFER_SIZE / sampledatarate;
@ -1517,10 +1517,10 @@ void bx_sb16_c::dsp_dmadone()
// if auto-DMA, reinitialize // if auto-DMA, reinitialize
if (DSP.dma.mode == 2) if (DSP.dma.mode == 2)
{ {
if ((DSP.dma.bits == 16) && (BX_SB16_DMAH != 0)) { if (DSP.dma.bits == 8 || (DSP.dma.bits == 16 && BX_SB16_DMAH != 0)) {
DSP.dma.count = (DSP.dma.blocklength + 1) * (DSP.dma.bps / 2) - 1; DSP.dma.count = DSP.dma.blocklength;
} else { } else {
DSP.dma.count = (DSP.dma.blocklength + 1) * DSP.dma.bps - 1; DSP.dma.count = ((DSP.dma.blocklength + 1) << 1) - 1;
} }
writelog(WAVELOG(4), "auto-DMA reinitializing to length %d", DSP.dma.count); writelog(WAVELOG(4), "auto-DMA reinitializing to length %d", DSP.dma.count);
} }