void S9xMSU1PostLoadState(void)
{
if (DataOpen())
{
REVERT_STREAM(dataStream, MSU1.MSU1_DATA_POS, 0);
}
if (MSU1.MSU1_STATUS & AudioPlaying)
{
if (AudioOpen())
{
REVERT_STREAM(audioStream, 4, 0);
READ_STREAM((char *)&audioLoopPos, 4, audioStream);
audioLoopPos = GET_LE32(&audioLoopPos);
audioLoopPos <<= 2;
audioLoopPos += 8;
REVERT_STREAM(audioStream, MSU1.MSU1_AUDIO_POS, 0);
}
else
{
MSU1.MSU1_STATUS &= ~(AudioPlaying | AudioRepeating);
MSU1.MSU1_STATUS |= AudioError;
}
}
bufPos = 0;
bufBegin = 0;
bufEnd = 0;
partial_frames = 0;
}
void S9xMSU1PostLoadState(void)
{
if (DataOpen())
{
REVERT_STREAM(dataStream, MSU1.MSU1_DATA_POS, 0);
}
if (MSU1.MSU1_STATUS & AudioPlaying)
{
uint32 savedPosition = MSU1.MSU1_AUDIO_POS;
if (AudioOpen())
{
REVERT_STREAM(audioStream, 4, 0);
READ_STREAM((char *)&audioLoopPos, 4, audioStream);
audioLoopPos = GET_LE32(&audioLoopPos);
audioLoopPos <<= 2;
audioLoopPos += 8;
MSU1.MSU1_AUDIO_POS = savedPosition;
REVERT_STREAM(audioStream, MSU1.MSU1_AUDIO_POS, 0);
}
else
{
MSU1.MSU1_STATUS &= ~(AudioPlaying | AudioRepeating);
MSU1.MSU1_STATUS |= AudioError;
}
}
if (msu_resampler)
msu_resampler->clear();
partial_frames = 0;
}
void S9xMSU1Generate(size_t sample_count)
{
partial_frames += 4410 * (sample_count / 2);
while ((bufPos < (bufEnd - 2)) && partial_frames >= 3204)
{
if (MSU1.MSU1_STATUS & AudioPlaying && audioStream)
{
int32 sample;
int16* left = (int16*)&sample;
int16* right = left + 1;
int bytes_read = READ_STREAM((char *)&sample, 4, audioStream);
if (bytes_read == 4)
{
*left = ((int32)(int16)GET_LE16(left) * MSU1.MSU1_VOLUME / 255);
*right = ((int32)(int16)GET_LE16(right) * MSU1.MSU1_VOLUME / 255);
*(bufPos++) = *left;
*(bufPos++) = *right;
MSU1.MSU1_AUDIO_POS += 4;
partial_frames -= 3204;
}
else
if (bytes_read >= 0)
{
if (MSU1.MSU1_STATUS & AudioRepeating)
{
MSU1.MSU1_AUDIO_POS = audioLoopPos;
REVERT_STREAM(audioStream, MSU1.MSU1_AUDIO_POS, 0);
}
else
{
MSU1.MSU1_STATUS &= ~(AudioPlaying | AudioRepeating);
REVERT_STREAM(audioStream, 8, 0);
}
}
else
{
MSU1.MSU1_STATUS &= ~(AudioPlaying | AudioRepeating);
}
}
else
{
MSU1.MSU1_STATUS &= ~(AudioPlaying | AudioRepeating);
partial_frames -= 3204;
*(bufPos++) = 0;
*(bufPos++) = 0;
}
}
}
void S9xMSU1WritePort(uint8 port, uint8 byte)
{
switch (port)
{
case 0:
MSU1.MSU1_DATA_SEEK &= 0xFFFFFF00;
MSU1.MSU1_DATA_SEEK |= byte << 0;
break;
case 1:
MSU1.MSU1_DATA_SEEK &= 0xFFFF00FF;
MSU1.MSU1_DATA_SEEK |= byte << 8;
break;
case 2:
MSU1.MSU1_DATA_SEEK &= 0xFF00FFFF;
MSU1.MSU1_DATA_SEEK |= byte << 16;
break;
case 3:
MSU1.MSU1_DATA_SEEK &= 0x00FFFFFF;
MSU1.MSU1_DATA_SEEK |= byte << 24;
MSU1.MSU1_DATA_POS = MSU1.MSU1_DATA_SEEK;
if (dataStream)
{
REVERT_STREAM(dataStream, MSU1.MSU1_DATA_POS, 0);
}
break;
case 4:
MSU1.MSU1_TRACK_SEEK &= 0xFF00;
MSU1.MSU1_TRACK_SEEK |= byte;
break;
case 5:
MSU1.MSU1_TRACK_SEEK &= 0x00FF;
MSU1.MSU1_TRACK_SEEK |= (byte << 8);
MSU1.MSU1_CURRENT_TRACK = MSU1.MSU1_TRACK_SEEK;
MSU1.MSU1_STATUS &= ~AudioPlaying;
MSU1.MSU1_STATUS &= ~AudioRepeating;
if (AudioOpen())
{
if (MSU1.MSU1_CURRENT_TRACK == MSU1.MSU1_RESUME_TRACK)
{
MSU1.MSU1_AUDIO_POS = MSU1.MSU1_RESUME_POS;
MSU1.MSU1_RESUME_POS = 0;
MSU1.MSU1_RESUME_TRACK = ~0;
}
else
{
MSU1.MSU1_AUDIO_POS = 8;
}
REVERT_STREAM(audioStream, MSU1.MSU1_AUDIO_POS, 0);
}
break;
case 6:
MSU1.MSU1_VOLUME = byte;
break;
case 7:
if (MSU1.MSU1_STATUS & (AudioBusy | AudioError))
break;
MSU1.MSU1_STATUS = (MSU1.MSU1_STATUS & ~0x30) | ((byte & 0x03) << 4);
if ((byte & (Play | Resume)) == Resume)
{
MSU1.MSU1_RESUME_TRACK = MSU1.MSU1_CURRENT_TRACK;
MSU1.MSU1_RESUME_POS = MSU1.MSU1_AUDIO_POS;
}
break;
}
}
