Retro/pcem
Watch
1
0
Fork
You've already forked pcem
 0
Code Issues Pull requests Projects Releases Packages Wiki Activity Actions

SB16 input and output share the same sampling rate. Fixes Fast Tracker 2.

Browse source
This commit is contained in:
TomW 2014-03-06 18:01:11 +00:00
commit 536b95576b
1 changed files with 7 additions and 10 deletions
Download patch file Download diff file Expand all files Collapse all files

21
src/sound_sb_dsp.c
View file

@ -318,21 +318,18 @@ void sb_exec_command(sb_dsp_t *dsp)
dsp->sblatcho = dsp->sblatchi = TIMER_USEC * (256 - dsp->sb_data[0]);
temp = 256 - dsp->sb_data[0];
temp = 1000000 / temp;
// printf("Sample rate - %ihz (%i)\n",temp, sblatcho);
// pclog("Sample rate - %ihz (%i)\n",temp, dsp->sblatcho);
dsp->sb_freq = temp;
break;
case 0x41: /*Set output sampling rate*/
if (dsp->sb_type < SB16) break;
dsp->sblatcho = (int)(TIMER_USEC * (1000000.0f / (float)(dsp->sb_data[1] + (dsp->sb_data[0] << 8))));
// printf("Sample rate - %ihz (%i)\n",sb_data[1]+(sb_data[0]<<8), sblatcho);
dsp->sb_freq = dsp->sb_data[1] + (dsp->sb_data[0] << 8);
dsp->sb_timeo = 256 + dsp->sb_freq;
break;
case 0x42: /*Set input sampling rate*/
if (dsp->sb_type < SB16) break;
dsp->sblatchi = (int)(TIMER_USEC * (1000000.0f / (float)(dsp->sb_data[1] + (dsp->sb_data[0] << 8))));
// printf("iample rate - %ihz\n",sb_data[1]+(sb_data[0]<<8));
dsp->sb_timei = 256 + dsp->sb_data[1] + (dsp->sb_data[0] << 8);
dsp->sblatcho = (int)(TIMER_USEC * (1000000.0f / (float)(dsp->sb_data[1] + (dsp->sb_data[0] << 8))));
// pclog("Sample rate - %ihz (%i)\n",dsp->sb_data[1]+(dsp->sb_data[0]<<8), dsp->sblatcho);
dsp->sb_freq = dsp->sb_data[1] + (dsp->sb_data[0] << 8);
dsp->sb_timeo = 256 + dsp->sb_freq;
dsp->sblatchi = dsp->sblatcho;
dsp->sb_timei = dsp->sb_timeo;
break;
case 0x48: /*Set DSP block transfer size*/
dsp->sb_8_autolen = dsp->sb_data[0] + (dsp->sb_data[1] << 8);
@ -516,7 +513,7 @@ void sb_exec_command(sb_dsp_t *dsp)
void sb_write(uint16_t a, uint8_t v, void *priv)
{
sb_dsp_t *dsp = (sb_dsp_t *)priv;
// printf("sb_write : Write soundblaster %04X %02X %04X:%04X %02X\n",a,v,CS,pc,dsp->sb_command);
// pclog("sb_write : Write soundblaster %04X %02X %04X:%04X %02X\n",a,v,CS,pc,dsp->sb_command);
switch (a&0xF)
{
case 6: /*Reset*/
@ -811,7 +808,7 @@ void pollsb(void *p)
if (dsp->sb_16_length < 0)
{
// pclog("16DMA over %i\n",sb_16_autoinit);
// pclog("16DMA over %i\n",dsp->sb_16_autoinit);
if (dsp->sb_16_autoinit) dsp->sb_16_length = dsp->sb_16_autolen;
else dsp->sb_16_enable = dsp->sbenable = 0;
sb_irq(dsp, 0);