mirror of
https://github.com/holub/mame
synced 2025-07-06 18:39:28 +03:00
okim6376: fix regression, small cleanup
This commit is contained in:
hap
parent
1fbfb5752e
commit
f52a3fa1d1
@ -80,10 +80,10 @@ static void compute_tables()
|
||||
for (nib = 0; nib < 16; nib++)
|
||||
{
|
||||
diff_lookup[step*16 + nib] = nbl2bit[nib][0] *
|
||||
(stepval * nbl2bit[nib][1] +
|
||||
stepval/2 * nbl2bit[nib][2] +
|
||||
stepval/4 * nbl2bit[nib][3] +
|
||||
stepval/8);
|
||||
(stepval * nbl2bit[nib][1] +
|
||||
stepval/2 * nbl2bit[nib][2] +
|
||||
stepval/4 * nbl2bit[nib][3] +
|
||||
stepval/8);
|
||||
}
|
||||
}
|
||||
|
||||
@ -113,24 +113,24 @@ void okim6376_device::ADPCMVoice::reset()
|
||||
DEFINE_DEVICE_TYPE(OKIM6376, okim6376_device, "okim6376", "OKI MSM6376 ADPCM")
|
||||
DEFINE_DEVICE_TYPE(OKIM6650, okim6650_device, "okim6650", "OKI MSM6650 ADPCM")
|
||||
|
||||
okim6376_device::okim6376_device(const machine_config &mconfig, device_type type, const char *tag, device_t *owner, uint32_t clock, int addrbits)
|
||||
: device_t(mconfig, type, tag, owner, clock),
|
||||
device_sound_interface(mconfig, *this),
|
||||
device_rom_interface(mconfig, *this),
|
||||
//m_command[OKIM6376_VOICES],
|
||||
m_latch(0),
|
||||
//m_stage[OKIM6376_VOICES],
|
||||
m_stream(nullptr),
|
||||
m_divisor(8),
|
||||
m_channel(0),
|
||||
m_nar(0),
|
||||
m_nartimer(0),
|
||||
m_busy(0),
|
||||
m_ch2(0),
|
||||
m_st(0),
|
||||
m_st_pulses(0),
|
||||
m_ch2_update(0),
|
||||
m_st_update(0)
|
||||
okim6376_device::okim6376_device(const machine_config &mconfig, device_type type, const char *tag, device_t *owner, uint32_t clock, int addrbits) :
|
||||
device_t(mconfig, type, tag, owner, clock),
|
||||
device_sound_interface(mconfig, *this),
|
||||
device_rom_interface(mconfig, *this),
|
||||
//m_command[OKIM6376_VOICES],
|
||||
m_latch(0),
|
||||
//m_stage[OKIM6376_VOICES],
|
||||
m_stream(nullptr),
|
||||
m_divisor(8),
|
||||
m_channel(0),
|
||||
m_nar(0),
|
||||
m_nartimer(0),
|
||||
m_busy(0),
|
||||
m_ch2(0),
|
||||
m_st(0),
|
||||
m_st_pulses(0),
|
||||
m_ch2_update(0),
|
||||
m_st_update(0)
|
||||
{
|
||||
override_address_width(addrbits);
|
||||
}
|
||||
@ -188,10 +188,8 @@ void okim6376_device::device_start()
|
||||
|
||||
void okim6376_device::device_reset()
|
||||
{
|
||||
int i;
|
||||
|
||||
m_stream->update();
|
||||
for (i = 0; i < OKIM6376_VOICES; i++)
|
||||
for (int i = 0; i < OKIM6376_VOICES; i++)
|
||||
m_voice[i].playing = 0;
|
||||
}
|
||||
|
||||
@ -304,7 +302,7 @@ void okim6376_device::oki_process(int channel, int command)
|
||||
}
|
||||
else
|
||||
{
|
||||
if (((m_nar)&&(channel == 0))||(channel == 1))//Store the request, for later processing (channel 2 ignores NAR)
|
||||
if ((m_nar && (channel == 0)) || (channel == 1)) // Store the request, for later processing (channel 2 ignores NAR)
|
||||
{
|
||||
m_stage[channel] = 1;
|
||||
}
|
||||
@ -318,10 +316,9 @@ void okim6376_device::oki_process(int channel, int command)
|
||||
/* update the stream, then turn it off */
|
||||
m_stream->update();
|
||||
|
||||
if (command ==0)
|
||||
if (command == 0)
|
||||
{
|
||||
int i;
|
||||
for (i = 0; i < OKIM6376_VOICES; i++)
|
||||
for (int i = 0; i < OKIM6376_VOICES; i++)
|
||||
{
|
||||
struct ADPCMVoice *voice = &m_voice[i];
|
||||
voice->playing = 0;
|
||||
@ -349,8 +346,6 @@ void okim6376_device::generate_adpcm(struct ADPCMVoice *voice, int16_t *buffer,
|
||||
/* loop while we still have samples to generate */
|
||||
while (samples)
|
||||
{
|
||||
int nibble;
|
||||
|
||||
if (count == 0)
|
||||
{
|
||||
/* get the number of samples to play */
|
||||
@ -370,7 +365,7 @@ void okim6376_device::generate_adpcm(struct ADPCMVoice *voice, int16_t *buffer,
|
||||
}
|
||||
|
||||
/* compute the new amplitude and update the current step */
|
||||
nibble = read_byte(base + sample / 2) >> (((sample & 1) << 2) ^ 4);
|
||||
int nibble = read_byte(base + sample / 2) >> (((sample & 1) << 2) ^ 4);
|
||||
|
||||
/* output to the buffer, scaling by the volume */
|
||||
/* signal in range -4096..4095, volume in range 2..16 => signal * volume / 2 in range -32768..32767 */
|
||||
@ -386,7 +381,11 @@ void okim6376_device::generate_adpcm(struct ADPCMVoice *voice, int16_t *buffer,
|
||||
voice->count = count;
|
||||
}
|
||||
|
||||
if ((!voice->playing)&&(m_stage[channel]))//end of samples, load anything staged in
|
||||
/* fill the rest with silence */
|
||||
while (samples--)
|
||||
*buffer++ = 0;
|
||||
|
||||
if (!voice->playing && m_stage[channel]) // end of samples, load anything staged in
|
||||
{
|
||||
m_stage[channel] = 0;
|
||||
oki_process(channel,m_command[channel]);
|
||||
@ -475,7 +474,7 @@ int okim6376_device::nar_r()
|
||||
|
||||
void okim6376_device::ch2_w(int state)
|
||||
{
|
||||
m_ch2_update = 0;//Clear flag
|
||||
m_ch2_update = 0; // Clear flag
|
||||
LOG("OKIM6376: CH2 %x\n",state);
|
||||
|
||||
if (m_ch2 != state)
|
||||
@ -483,7 +482,7 @@ void okim6376_device::ch2_w(int state)
|
||||
m_ch2 = state;
|
||||
m_ch2_update = 1;
|
||||
}
|
||||
if((!m_ch2)&&(m_ch2_update))
|
||||
if (!m_ch2 && m_ch2_update)
|
||||
{
|
||||
m_st_pulses = 0;
|
||||
struct ADPCMVoice *voice0 = &m_voice[0];
|
||||
@ -492,17 +491,17 @@ void okim6376_device::ch2_w(int state)
|
||||
LOG("OKIM6376: Channel 1\n");
|
||||
m_channel = 1;
|
||||
|
||||
if ((voice0->playing)&&(m_st))
|
||||
if (voice0->playing && m_st)
|
||||
{
|
||||
//Echo functions when Channel 1 is playing, and ST is still high
|
||||
m_command[1] = m_command[0];//copy sample over
|
||||
voice1->volume = volume_table[1]; //echo is 6dB attenuated
|
||||
// Echo functions when Channel 1 is playing, and ST is still high
|
||||
m_command[1] = m_command[0]; // copy sample over
|
||||
voice1->volume = volume_table[1]; // echo is 6dB attenuated
|
||||
}
|
||||
}
|
||||
|
||||
if((m_ch2)&&(m_ch2_update))
|
||||
if (m_ch2 && m_ch2_update)
|
||||
{
|
||||
m_stage[1]=0;
|
||||
m_stage[1] = 0;
|
||||
oki_process(1, m_command[1]);
|
||||
LOG("OKIM6376: Channel 0\n");
|
||||
m_channel = 0;
|
||||
@ -512,9 +511,9 @@ void okim6376_device::ch2_w(int state)
|
||||
|
||||
void okim6376_device::st_w(int state)
|
||||
{
|
||||
//As in STart, presumably, this triggers everything
|
||||
// As in STart, presumably, this triggers everything
|
||||
|
||||
m_st_update = 0;//Clear flag
|
||||
m_st_update = 0; // Clear flag
|
||||
LOG("OKIM6376: ST %x\n",state);
|
||||
|
||||
if (m_st != state)
|
||||
@ -522,7 +521,7 @@ void okim6376_device::st_w(int state)
|
||||
m_st = state;
|
||||
m_st_update = 1;
|
||||
|
||||
if ((m_channel == 1) & !m_st)//ST acts as attenuation for Channel 2 when low, and stays at that level until the channel is reset
|
||||
if ((m_channel == 1) & !m_st) // ST acts as attenuation for Channel 2 when low, and stays at that level until the channel is reset
|
||||
{
|
||||
struct ADPCMVoice *voice = &m_voice[m_channel];
|
||||
{
|
||||
@ -530,7 +529,7 @@ void okim6376_device::st_w(int state)
|
||||
LOG("OKIM6376: ST pulses %x\n",m_st_pulses);
|
||||
if (m_st_pulses > 3)
|
||||
{
|
||||
m_st_pulses = 3; //undocumented behaviour beyond 3 pulses
|
||||
m_st_pulses = 3; // undocumented behaviour beyond 3 pulses
|
||||
}
|
||||
|
||||
voice->volume = volume_table[m_st_pulses - 1];
|
||||
@ -539,13 +538,13 @@ void okim6376_device::st_w(int state)
|
||||
if (m_st && m_st_update)
|
||||
{
|
||||
m_command[m_channel] = m_latch;
|
||||
if (m_channel ==0 && m_nar)
|
||||
if (m_channel == 0 && m_nar)
|
||||
{
|
||||
m_stage[m_channel]=0;
|
||||
m_stage[m_channel] = 0;
|
||||
oki_process(0, m_command[0]);
|
||||
m_nar = 0;
|
||||
m_nartimer = 4;
|
||||
/*According to datasheet, NAR timing is ~375 us at 8KHz, and is inversely proportional to sample rate, effectively 6 stream updates. */
|
||||
/* According to datasheet, NAR timing is ~375 us at 8KHz, and is inversely proportional to sample rate, effectively 6 stream updates. */
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
@ -31562,6 +31562,16 @@ mirax
|
||||
miraxa
|
||||
miraxb
|
||||
|
||||
@source:misc/miuchiz.cpp
|
||||
miuchiz
|
||||
mcb_cloe
|
||||
mcb_yasmin
|
||||
mcm_creeper
|
||||
mcm_inferno
|
||||
mcm_roc
|
||||
mcp_dash
|
||||
mcp_spike
|
||||
|
||||
@source:misc/mirderby.cpp
|
||||
mirderby
|
||||
|
||||
@ -43190,16 +43200,6 @@ minifram
|
||||
@source:skeleton/minihock.cpp
|
||||
minihockey
|
||||
|
||||
@source:misc/miuchiz.cpp
|
||||
miuchiz
|
||||
mcb_cloe
|
||||
mcb_yasmin
|
||||
mcm_creeper
|
||||
mcm_inferno
|
||||
mcm_roc
|
||||
mcp_dash
|
||||
mcp_spike
|
||||
|
||||
@source:skeleton/ml20.cpp
|
||||
ml20
|
||||
|
||||
|
||||
Loading…
Reference in New Issue
Block a user