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Looping, adds a lot of noise of course because we don't yet know how to keyoff

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This commit is contained in:
Angelo Salese 2015-04-09 21:52:57 +02:00
parent 13ab889729
commit 19aabb8609
2 changed files with 15 additions and 4 deletions
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18
src/emu/sound/l7a1045_l6028_dsp_a.c
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@ -127,7 +127,7 @@ void l7a1045_sound_device::sound_stream_update(sound_stream &stream, stream_samp
memset(outputs[0], 0, samples*sizeof(*outputs[0]));
memset(outputs[1], 0, samples*sizeof(*outputs[1]));
for (int i = 0; i < 32; i++)
for (int i = 0; i < 32; i+=2)
{
if (m_key & (1 << i))
{
@ -136,7 +136,7 @@ void l7a1045_sound_device::sound_stream_update(sound_stream &stream, stream_samp
UINT32 start = vptr->start;
UINT32 end = vptr->end;
UINT32 step = 0x400;
UINT32 pos = vptr->pos;
UINT32 frac = vptr->frac;
@ -150,8 +150,16 @@ void l7a1045_sound_device::sound_stream_update(sound_stream &stream, stream_samp
if ((start + pos) >= end)
{
m_key &= ~(1 << i);
if(vptr->mode == true) // loop
{
pos = vptr->pos = 0;
frac = vptr->frac = 0;
}
else // no loop, keyoff
{
m_key &= ~(1 << i);
break;
}
}
@ -249,6 +257,7 @@ WRITE16_MEMBER(l7a1045_sound_device::sound_data_w)
{
vptr->end = (m_audiodat[m_audioregister][m_audiochannel].dat[0] & 0xffff) << 2;
vptr->end += vptr->start;
vptr->mode = false;
// hopefully it'll never happen? Maybe assert here?
vptr->end &= m_rom_size - 1;
@ -258,6 +267,7 @@ WRITE16_MEMBER(l7a1045_sound_device::sound_data_w)
vptr->end = (m_audiodat[m_audioregister][m_audiochannel].dat[2] & 0x000f) << (16 + 4);
vptr->end |= (m_audiodat[m_audioregister][m_audiochannel].dat[1] & 0xffff) << (4);
vptr->end |= (m_audiodat[m_audioregister][m_audiochannel].dat[0] & 0xf000) >> (12);
vptr->mode = true;
vptr->end &= m_rom_size - 1;
}

1
src/emu/sound/l7a1045_l6028_dsp_a.h
View File

@ -14,6 +14,7 @@ struct l7a1045_voice
UINT32 start;
UINT32 end;
bool mode;
UINT32 pos;
UINT32 frac;
UINT16 l_volume;