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-spg2xx_audio: Fixed off-by-one on Beat Count timer, fixing timing in icanpian and to an extent shredmjr. [Ryan Holtz]

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This commit is contained in:
MooglyGuy 2020-02-07 16:18:53 +01:00
parent 43ab8a7d0d
commit fdc92d8bf4
1 changed files with 12 additions and 7 deletions
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19
src/devices/machine/spg2xx_audio.cpp
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@ -37,7 +37,7 @@ DEFINE_DEVICE_TYPE(SUNPLUS_GCM394_AUDIO, sunplus_gcm394_audio_device, "gcm394_au
#define LOG_ALL (LOG_SPU_READS | LOG_SPU_WRITES | LOG_UNKNOWN_SPU | LOG_CHANNEL_READS | LOG_CHANNEL_WRITES \
| LOG_ENVELOPES | LOG_SAMPLES | LOG_RAMPDOWN | LOG_BEAT)
#define VERBOSE (0)
#define VERBOSE (LOG_ALL & ~(LOG_SAMPLES | LOG_ENVELOPES))
#include "logmacro.h"
#define SPG_DEBUG_AUDIO (0)
@ -1099,12 +1099,23 @@ inline void spg2xx_audio_device::loop_channel(const uint32_t channel)
void spg2xx_audio_device::audio_beat_tick()
{
if (m_audio_curr_beat_base_count > 0)
{
m_audio_curr_beat_base_count--;
}
if (m_audio_curr_beat_base_count == 0)
{
LOGMASKED(LOG_BEAT, "Beat base count elapsed, reloading with %d\n", m_audio_ctrl_regs[AUDIO_BEAT_BASE_COUNT]);
m_audio_curr_beat_base_count = m_audio_ctrl_regs[AUDIO_BEAT_BASE_COUNT];
uint16_t beat_count = m_audio_ctrl_regs[AUDIO_BEAT_COUNT] & AUDIO_BEAT_COUNT_MASK;
if (beat_count > 0)
{
beat_count--;
m_audio_ctrl_regs[AUDIO_BEAT_COUNT] = (m_audio_ctrl_regs[AUDIO_BEAT_COUNT] & ~AUDIO_BEAT_COUNT_MASK) | beat_count;
}
if (beat_count == 0)
{
if (m_audio_ctrl_regs[AUDIO_BEAT_COUNT] & AUDIO_BIE_MASK)
@ -1118,13 +1129,7 @@ void spg2xx_audio_device::audio_beat_tick()
LOGMASKED(LOG_BEAT, "Beat count elapsed but IRQ not enabled\n");
}
}
else
{
beat_count--;
m_audio_ctrl_regs[AUDIO_BEAT_COUNT] = (m_audio_ctrl_regs[AUDIO_BEAT_COUNT] & ~AUDIO_BEAT_COUNT_MASK) | beat_count;
}
}
m_audio_curr_beat_base_count--;
}
void spg2xx_audio_device::audio_rampdown_tick(const uint32_t channel)