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and an optimization

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This commit is contained in:
Michaël Banaan Ananas 2013-06-28 01:59:26 +00:00
parent 80cf988718
commit bfbd892308
4 changed files with 16 additions and 13 deletions
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16
src/emu/sound/ymf271.c
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@ -633,14 +633,13 @@ void ymf271_device::sound_stream_update(sound_stream &stream, stream_sample_t **
int i, j;
int op;
INT32 *mixp;
INT32 mix[48000*2];
memset(mix, 0, sizeof(mix[0])*samples*2);
memset(m_mix_buffer, 0, sizeof(m_mix_buffer[0])*samples*2);
for (j = 0; j < 12; j++)
{
YMF271Group *slot_group = &m_groups[j];
mixp = &mix[0];
mixp = m_mix_buffer;
if (slot_group->pfm && slot_group->sync != 3)
{
@ -656,7 +655,7 @@ void ymf271_device::sound_stream_update(sound_stream &stream, stream_sample_t **
int slot2 = j + (1*12);
int slot3 = j + (2*12);
int slot4 = j + (3*12);
mixp = &mix[0];
mixp = m_mix_buffer;
if (m_slots[slot1].active)
{
@ -843,7 +842,7 @@ void ymf271_device::sound_stream_update(sound_stream &stream, stream_sample_t **
int slot1 = j + ((op + 0) * 12);
int slot2 = j + ((op + 2) * 12);
mixp = &mix[0];
mixp = m_mix_buffer;
if (m_slots[slot1].active)
{
for (i = 0; i < samples; i++)
@ -895,7 +894,7 @@ void ymf271_device::sound_stream_update(sound_stream &stream, stream_sample_t **
int slot1 = j + (0*12);
int slot2 = j + (1*12);
int slot3 = j + (2*12);
mixp = &mix[0];
mixp = m_mix_buffer;
if (m_slots[slot1].active)
{
@ -981,7 +980,7 @@ void ymf271_device::sound_stream_update(sound_stream &stream, stream_sample_t **
}
}
mixp = &mix[0];
mixp = m_mix_buffer;
update_pcm(j + (3*12), mixp, samples);
break;
}
@ -997,7 +996,7 @@ void ymf271_device::sound_stream_update(sound_stream &stream, stream_sample_t **
}
}
mixp = &mix[0];
mixp = m_mix_buffer;
for (i = 0; i < samples; i++)
{
outputs[0][i] = (*mixp++)>>2;
@ -1711,6 +1710,7 @@ void ymf271_device::device_start()
init_state();
m_stream = machine().sound().stream_alloc(*this, 0, 2, clock()/384);
m_mix_buffer = auto_alloc_array(machine(), INT32, 44100*2);
for (i = 0; i < 256; i++)
{

4
src/emu/sound/ymf271.h
View File

@ -65,7 +65,8 @@ private:
UINT32 loopaddr;
UINT32 endaddr;
INT8 altloop;
INT8 fs, srcnote, srcb;
INT8 fs;
INT8 srcnote, srcb;
INT64 step;
INT64 stepptr;
@ -138,6 +139,7 @@ private:
emu_timer *m_timA, *m_timB;
sound_stream *m_stream;
INT32 *m_mix_buffer;
devcb2_write_line m_irq_handler;
devcb2_read8 m_ext_read_handler;

8
src/emu/sound/ymf278b.c
View File

@ -251,9 +251,8 @@ void ymf278b_device::sound_stream_update(sound_stream &stream, stream_sample_t *
INT16 sample = 0;
INT32 *mixp;
INT32 vl, vr;
INT32 mix[44100*2];
memset(mix, 0, sizeof(mix[0])*samples*2);
memset(m_mix_buffer, 0, sizeof(m_mix_buffer[0])*samples*2);
for (i = 0; i < 24; i++)
{
@ -261,7 +260,7 @@ void ymf278b_device::sound_stream_update(sound_stream &stream, stream_sample_t *
if (slot->active)
{
mixp = mix;
mixp = m_mix_buffer;
for (j = 0; j < samples; j++)
{
@ -320,7 +319,7 @@ void ymf278b_device::sound_stream_update(sound_stream &stream, stream_sample_t *
}
}
mixp = mix;
mixp = m_mix_buffer;
vl = m_mix_level[m_pcm_l];
vr = m_mix_level[m_pcm_r];
for (i = 0; i < samples; i++)
@ -972,6 +971,7 @@ void ymf278b_device::device_start()
}
m_stream = machine().sound().stream_alloc(*this, 0, 2, clock()/768);
m_mix_buffer = auto_alloc_array(machine(), INT32, 44100*2);
// rate tables
precompute_rate_tables();

1
src/emu/sound/ymf278b.h
View File

@ -125,6 +125,7 @@ private:
int m_clock;
sound_stream * m_stream;
INT32 *m_mix_buffer;
devcb2_write_line m_irq_handler;
};