private void rf5c68_mem_stream_flush(rf5c68_state chip)
{
mem_stream ms = chip.memstrm;
if (ms.CurAddr >= ms.EndAddr)
{
return;
}
//memcpy(chip.data + ms.CurAddr, ms.MemPnt + (ms.CurAddr - ms.BaseAddr), ms.EndAddr - ms.CurAddr);
Array.Copy(ms.MemPnt, (ms.CurAddr - ms.BaseAddr), chip.data, ms.CurAddr, ms.EndAddr - ms.CurAddr);
ms.CurAddr = ms.EndAddr;
return;
}
public void rf5c68_write_ram2(byte ChipID, int DataStart, int DataLength, byte[] RAMData, uint SrcStartAdr)
{
rf5c68_state chip = RF5C68Data[ChipID];
mem_stream ms = chip.memstrm;
UInt16 BytCnt;
DataStart |= chip.wbank * 0x1000;
if (DataStart >= chip.datasize)
{
return;
}
if (DataStart + DataLength > chip.datasize)
{
DataLength = (int)(chip.datasize - DataStart);
}
//memcpy(chip.data + DataStart, RAMData, DataLength);
rf5c68_mem_stream_flush(chip);
ms.BaseAddr = (uint)DataStart;
ms.CurAddr = ms.BaseAddr;
ms.EndAddr = (uint)(ms.BaseAddr + DataLength);
ms.CurStep = 0x0000;
byte[] dat = new byte[DataLength];
for (int ind = 0; ind < DataLength; ind++)
{
dat[ind] = RAMData[SrcStartAdr + ind];
}
ms.MemPnt = dat;
//BytCnt = (STEAM_STEP * 32) >> 11;
BytCnt = 0x40; // SegaSonic Arcade: Run! Run! Run! needs such a high value
if (ms.CurAddr + BytCnt > ms.EndAddr)
{
BytCnt = (UInt16)(ms.EndAddr - ms.CurAddr);
}
//memcpy(chip.data + ms.CurAddr, ms.MemPnt + (ms.CurAddr - ms.BaseAddr), BytCnt);
Array.Copy(ms.MemPnt, (ms.CurAddr - ms.BaseAddr), chip.data, ms.CurAddr, BytCnt);
ms.CurAddr += BytCnt;
return;
}
/*INLINE rf5c68_state *get_safe_token(const device_config *device)
* {
* assert(device != NULL);
* assert(device->token != NULL);
* assert(device->type == SOUND);
* assert(sound_get_type(device) == SOUND_RF5C68);
* return (rf5c68_state *)device->token;
* }*/
/************************************************/
/* RF5C68 stream update */
/************************************************/
private void memstream_sample_check(rf5c68_state chip, UInt32 addr, UInt16 Speed)
{
mem_stream ms = chip.memstrm;
UInt32 SmplSpd;
SmplSpd = (uint)((Speed >= 0x0800) ? (Speed >> 11) : 1);
if (addr >= ms.CurAddr)
{
// Is the stream too fast? (e.g. about to catch up the output)
if (addr - ms.CurAddr <= SmplSpd * 5)
{
// Yes - delay the stream
ms.CurAddr -= SmplSpd * 4;
if (ms.CurAddr < ms.BaseAddr)
{
ms.CurAddr = ms.BaseAddr;
}
}
}
else
{
// Is the stream too slow? (e.g. the output is about to catch up the stream)
if (ms.CurAddr - addr <= SmplSpd * 5)
{
if (ms.CurAddr + SmplSpd * 4 >= ms.EndAddr)
{
rf5c68_mem_stream_flush(chip);
}
else
{
//memcpy(chip.data + ms.CurAddr, ms.MemPnt + (ms.CurAddr - ms.BaseAddr), SmplSpd * 4);
Array.Copy(ms.MemPnt, (ms.CurAddr - ms.BaseAddr), chip.data, ms.CurAddr, SmplSpd * 4);
ms.CurAddr += SmplSpd * 4;
}
}
}
return;
}
private void device_reset_rf5c68(byte ChipID)
{
rf5c68_state chip = RF5C68Data[ChipID];
int i;
pcm_channel chan;
mem_stream ms = chip.memstrm;
// Clear the PCM memory.
//memset(chip.data, 0x00, chip.datasize);
for (int ind = 0; ind < chip.datasize; ind++)
{
chip.data[ind] = 0;
}
chip.enable = 0;
chip.cbank = 0;
chip.wbank = 0;
/* clear channel registers */
for (i = 0; i < NUM_CHANNELS; i++)
{
chan = chip.chan[i];
chan.enable = 0;
chan.env = 0;
chan.pan = 0;
chan.start = 0;
chan.addr = 0;
chan.step = 0;
chan.loopst = 0;
}
ms.BaseAddr = 0x0000;
ms.CurAddr = 0x0000;
ms.EndAddr = 0x0000;
ms.CurStep = 0x0000;
ms.MemPnt = null;
}
//static STREAM_UPDATE( rf5c68_update )
private void rf5c68_update(byte ChipID, int[][] outputs, int samples)
{
//rf5c68_state *chip = (rf5c68_state *)param;
rf5c68_state chip = RF5C68Data[ChipID];
mem_stream ms = chip.memstrm;
int[] left = outputs[0];
int[] right = outputs[1];
int i, j;
/* start with clean buffers */
for (int ind = 0; ind < samples; ind++)
{
left[ind] = 0;
right[ind] = 0;
}
/* bail if not enabled */
if (chip.enable == 0)
{
return;
}
/* loop over channels */
for (i = 0; i < NUM_CHANNELS; i++)
{
pcm_channel chan = chip.chan[i];
/* if this channel is active, accumulate samples */
if (chan.enable != 0)// && chan.Muted == 0)
{
int lv = (chan.pan & 0x0f) * chan.env;
int rv = ((chan.pan >> 4) & 0x0f) * chan.env;
/* loop over the sample buffer */
for (j = 0; j < samples; j++)
{
int sample;
/* trigger sample callback */
/*if(chip.sample_callback)
* {
* if(((chan.addr >> 11) & 0xfff) == 0xfff)
* chip.sample_callback(chip.device,((chan.addr >> 11)/0x2000));
* }*/
memstream_sample_check(chip, (chan.addr >> 11) & 0xFFFF, chan.step);
/* fetch the sample and handle looping */
sample = chip.data[(chan.addr >> 11) & 0xffff];
if (sample == 0xff)
{
chan.addr = (uint)(chan.loopst << 11);
sample = chip.data[(chan.addr >> 11) & 0xffff];
/* if we loop to a loop point, we're effectively dead */
if (sample == 0xff)
{
chan.key = false;
break;
}
}
chan.key = true;
chan.addr += chan.step;
if (chan.Muted == 0)
{
/* add to the buffer */
if ((sample & 0x80) != 0)
{
sample &= 0x7f;
left[j] += (sample * lv) >> 5;
right[j] += (sample * rv) >> 5;
}
else
{
left[j] -= (sample * lv) >> 5;
right[j] -= (sample * rv) >> 5;
}
}
//Console.WriteLine("Ch:{0} L:{1} R:{2}", i, outputs[0][j], outputs[1][j]);
}
}
}
if (samples != 0 && ms.CurAddr < ms.EndAddr)
{
ms.CurStep += (UInt16)(STEAM_STEP * samples);
if (ms.CurStep >= 0x0800) // 1 << 11
{
i = ms.CurStep >> 11;
ms.CurStep &= 0x07FF;
if (ms.CurAddr + i > ms.EndAddr)
{
i = (int)(ms.EndAddr - ms.CurAddr);
}
//memcpy(chip.data + ms.CurAddr, ms.MemPnt + (ms.CurAddr - ms.BaseAddr), i);
Array.Copy(ms.MemPnt, (ms.CurAddr - ms.BaseAddr), chip.data, ms.CurAddr, i);
ms.CurAddr += (uint)i;
}
}
// I think, this is completely useless
/* now clamp and shift the result (output is only 10 bits) */
/*for (j = 0; j < samples; j++)
* {
* stream_sample_t temp;
*
* temp = left[j];
* if (temp > 32767) temp = 32767;
* else if (temp < -32768) temp = -32768;
* left[j] = temp & ~0x3f;
*
* temp = right[j];
* if (temp > 32767) temp = 32767;
* else if (temp < -32768) temp = -32768;
* right[j] = temp & ~0x3f;
* }*/
}