//static STREAM_UPDATE( ym2612_stream_update )
void ym2612_stream_update(UINT8 ChipID, stream_sample_t **outputs, int samples)
{
//ym2612_state *info = (ym2612_state *)param;
ym2612_state *info = &YM2612Data[ChipID];
#ifdef ENABLE_ALL_CORES
int i;
#endif
switch(EMU_CORE)
{
case EC_MAME:
ym2612_update_one(info->chip, outputs, samples);
break;
#ifdef ENABLE_ALL_CORES
case EC_GENS:
YM2612_ClearBuffer(GensBuf, samples);
YM2612_Update(info->chip, GensBuf, samples);
YM2612_DacAndTimers_Update(info->chip, GensBuf, samples);
for (i = 0x00; i < samples; i ++)
{
outputs[0x00][i] = (stream_sample_t)GensBuf[0x00][i];
outputs[0x01][i] = (stream_sample_t)GensBuf[0x01][i];
}
break;
#endif
}
}
/* update request from fm.c */
void ym2612_update_request(void *param)
{
ym2612_state *info = (ym2612_state *)param;
//stream_update(info->stream);
switch(EMU_CORE)
{
case EC_MAME:
ym2612_update_one(info->chip, DUMMYBUF, 0);
break;
#ifdef ENABLE_ALL_CORES
case EC_GENS:
YM2612_Update(info->chip, DUMMYBUF, 0);
YM2612_DacAndTimers_Update(info->chip, DUMMYBUF, 0);
break;
#endif
}
}
unsigned char *GYM_Next(unsigned char *gym_start, unsigned char *gym_pos, unsigned int gym_size, unsigned int gym_loop)
{
unsigned char c, c2;
unsigned char dac_data[1600];
int *buf[2];
int dacMax = 0, i = 0;
int oldPos = 0;
double curPos = 0;
double dacSize;
int step;
int *dacBuf[2];
int retCode = 1;
YM_Buf[0] = PSG_Buf[0] = buf[0] = Seg_L;
YM_Buf[1] = PSG_Buf[1] = buf[1] = Seg_R;
YM_Len = PSG_Len = 0;
memset(dac_data, 0, sizeof(dac_data));
if (!gym_pos)
{
return 0;
}
if ((unsigned int)(gym_pos - gym_start) >= gym_size)
{
if (gym_loop)
{
gym_pos = jump_gym_time_pos(gym_start, gym_size, gym_loop - 1);
}
else
{
return 0;
}
}
do
{
c = *gym_pos++;
switch(c)
{
case 0:
if (YM2612_Enable)
{
// if dacMax is zero, dacSize will be NaN - so what, we won't
// be using it in that case anyway :p
dacSize = (double)Seg_Lenght / dacMax;
for (i = 0; i < dacMax; i++)
{
oldPos = (int)curPos;
YM2612_Write(0, 0x2A);
YM2612_Write(1, dac_data[i]);
if (i == dacMax - 1)
{
step = Seg_Lenght - oldPos;
}
else
{
curPos += dacSize;
step = (int)curPos - oldPos;
}
dacBuf[0] = buf[0] + (int)oldPos;
dacBuf[1] = buf[1] + (int)oldPos;
YM2612_DacAndTimers_Update(dacBuf, step);
}
YM2612_Update(buf, Seg_Lenght);
}
if (PSG_Enable)
{
if (PSG_Improv)
{
PSG_Update_SIN(buf, Seg_Lenght);
}
else
{
PSG_Update(buf, Seg_Lenght);
}
}
break;
case 1:
c2 = *gym_pos++;
if (c2 == 0x2A)
{
c2 = *gym_pos++;
dac_data[dacMax++] = c2;
}
else
{
YM2612_Write(0, c2);
c2 = *gym_pos++;
YM2612_Write(1, c2);
}
break;
case 2:
c2 = *gym_pos++;
YM2612_Write(2, c2);
c2 = *gym_pos++;
YM2612_Write(3, c2);
break;
case 3:
c2 = *gym_pos++;
PSG_Write(c2);
break;
}
} while (c);
return gym_pos;
}
