void BurnYM2612UpdateRequest()
{
YM2612Render(BurnYM2612StreamCallback(nBurnYM2612SoundRate));
}
// Update the sound buffer
static void YM2612UpdateNormal(short* pSoundBuf, int nSegmentEnd)
{
int nSegmentLength = nSegmentEnd;
int i;
// bprintf(PRINT_NORMAL, _T(" YM2612 update -> %6i\n", nSegmentLength));
if (nSegmentEnd < nYM2612Position) {
nSegmentEnd = nYM2612Position;
}
if (nSegmentLength > nBurnSoundLen) {
nSegmentLength = nBurnSoundLen;
}
YM2612Render(nSegmentEnd);
pYM2612Buffer[0] = pBuffer + 4 + 0 * 4096;
pYM2612Buffer[1] = pBuffer + 4 + 1 * 4096;
if (nNumChips > 1) {
pYM2612Buffer[2] = pBuffer + 4 + 2 * 4096;
pYM2612Buffer[3] = pBuffer + 4 + 3 * 4096;
}
for (int n = nFractionalPosition; n < nSegmentLength; n++) {
int nTotalSample;
nTotalSample = pYM2612Buffer[0][n];
if (nNumChips > 1) nTotalSample += pYM2612Buffer[2][n];
if (nTotalSample < -32768) {
nTotalSample = -32768;
} else {
if (nTotalSample > 32767) {
nTotalSample = 32767;
}
}
if (bYM2612AddSignal) {
pSoundBuf[(n << 1) + 0] += nTotalSample;
} else {
pSoundBuf[(n << 1) + 0] = nTotalSample;
}
nTotalSample = pYM2612Buffer[1][n];
if (nNumChips > 1) nTotalSample += pYM2612Buffer[3][n];
if (nTotalSample < -32768) {
nTotalSample = -32768;
} else {
if (nTotalSample > 32767) {
nTotalSample = 32767;
}
}
if (bYM2612AddSignal) {
pSoundBuf[(n << 1) + 1] += nTotalSample;
} else {
pSoundBuf[(n << 1) + 1] = nTotalSample;
}
}
nFractionalPosition = nSegmentLength;
if (nSegmentEnd >= nBurnSoundLen) {
int nExtraSamples = nSegmentEnd - nBurnSoundLen;
for (i = 0; i < nExtraSamples; i++) {
pYM2612Buffer[0][i] = pYM2612Buffer[0][nBurnSoundLen + i];
pYM2612Buffer[1][i] = pYM2612Buffer[1][nBurnSoundLen + i];
if (nNumChips > 1) {
pYM2612Buffer[2][i] = pYM2612Buffer[2][nBurnSoundLen + i];
pYM2612Buffer[3][i] = pYM2612Buffer[3][nBurnSoundLen + i];
}
}
nFractionalPosition = 0;
nYM2612Position = nExtraSamples;
dTime += 100.0 / nBurnFPS;
}
}
static void YM2612UpdateResample(INT16* pSoundBuf, INT32 nSegmentEnd)
{
#if defined FBA_DEBUG
if (!DebugSnd_YM2612Initted) bprintf(PRINT_ERROR, _T("YM2612UpdateResample called without init\n"));
#endif
INT32 nSegmentLength = nSegmentEnd;
INT32 nSamplesNeeded = nSegmentEnd * nBurnYM2612SoundRate / nBurnSoundRate + 1;
if (nSamplesNeeded < nYM2612Position) {
nSamplesNeeded = nYM2612Position;
}
if (nSegmentLength > nBurnSoundLen) {
nSegmentLength = nBurnSoundLen;
}
nSegmentLength <<= 1;
YM2612Render(nSamplesNeeded);
pYM2612Buffer[0] = pBuffer + 0 * 4096 + 4;
pYM2612Buffer[1] = pBuffer + 1 * 4096 + 4;
if (nNumChips > 1) {
pYM2612Buffer[2] = pBuffer + 2 * 4096 + 4;
pYM2612Buffer[3] = pBuffer + 3 * 4096 + 4;
}
for (INT32 i = (nFractionalPosition & 0xFFFF0000) >> 15; i < nSegmentLength; i += 2, nFractionalPosition += nSampleSize) {
INT32 nLeftSample[4] = {0, 0, 0, 0};
INT32 nRightSample[4] = {0, 0, 0, 0};
INT32 nTotalLeftSample, nTotalRightSample;
INTERPOLATE_ADD_SOUND_LEFT (BURN_SND_YM2612_YM2612_ROUTE_1, 0)
INTERPOLATE_ADD_SOUND_RIGHT (BURN_SND_YM2612_YM2612_ROUTE_1, 0)
INTERPOLATE_ADD_SOUND_LEFT (BURN_SND_YM2612_YM2612_ROUTE_2, 1)
INTERPOLATE_ADD_SOUND_RIGHT (BURN_SND_YM2612_YM2612_ROUTE_2, 1)
if (nNumChips > 1) {
INTERPOLATE_ADD_SOUND_LEFT (2 + BURN_SND_YM2612_YM2612_ROUTE_1, 2)
INTERPOLATE_ADD_SOUND_RIGHT (2 + BURN_SND_YM2612_YM2612_ROUTE_1, 2)
INTERPOLATE_ADD_SOUND_LEFT (2 + BURN_SND_YM2612_YM2612_ROUTE_2, 3)
INTERPOLATE_ADD_SOUND_RIGHT (2 + BURN_SND_YM2612_YM2612_ROUTE_2, 3)
}
nTotalLeftSample = INTERPOLATE4PS_16BIT((nFractionalPosition >> 4) & 0x0fff, nLeftSample[0], nLeftSample[1], nLeftSample[2], nLeftSample[3]);
nTotalRightSample = INTERPOLATE4PS_16BIT((nFractionalPosition >> 4) & 0x0fff, nRightSample[0], nRightSample[1], nRightSample[2], nRightSample[3]);
nTotalLeftSample = BURN_SND_CLIP(nTotalLeftSample);
nTotalRightSample = BURN_SND_CLIP(nTotalRightSample);
if (bYM2612AddSignal) {
pSoundBuf[i + 0] = BURN_SND_CLIP(pSoundBuf[i + 0] + nTotalLeftSample);
pSoundBuf[i + 1] = BURN_SND_CLIP(pSoundBuf[i + 1] + nTotalRightSample);
} else {
pSoundBuf[i + 0] = nTotalLeftSample;
pSoundBuf[i + 1] = nTotalRightSample;
}
}
if (nSegmentEnd >= nBurnSoundLen) {
INT32 nExtraSamples = nSamplesNeeded - (nFractionalPosition >> 16);
for (INT32 i = -4; i < nExtraSamples; i++) {
pYM2612Buffer[0][i] = pYM2612Buffer[0][(nFractionalPosition >> 16) + i];
pYM2612Buffer[1][i] = pYM2612Buffer[1][(nFractionalPosition >> 16) + i];
if (nNumChips > 1) {
pYM2612Buffer[2][i] = pYM2612Buffer[2][(nFractionalPosition >> 16) + i];
pYM2612Buffer[3][i] = pYM2612Buffer[3][(nFractionalPosition >> 16) + i];
}
}
