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| author | notaz | 2011-09-06 20:18:34 +0300 |
|---|---|---|
| committer | notaz | 2011-09-08 00:48:33 +0300 |
| commit | 2f1c528a6c37558760b28638d271f5ff9ba45e4f (patch) | |
| tree | cf0efc8e28469726fd231e54f8655ae94ecdc891 /main.h | |
| parent | a231964c3570be4cf3d2efd023090b6a9e730935 (diff) | |
| download | picogpsp-2f1c528a6c37558760b28638d271f5ff9ba45e4f.tar.gz picogpsp-2f1c528a6c37558760b28638d271f5ff9ba45e4f.tar.bz2 picogpsp-2f1c528a6c37558760b28638d271f5ff9ba45e4f.zip | |
tweak sound buffering and timing to better match pandora's refresh.
this also changes how direct sound channels are started and
sample step precision is increased to hopefully fix gbc + direct
channel desync that has been reported on the forums.
Diffstat (limited to 'main.h')
| -rw-r--r-- | main.h | 9 |
1 files changed, 4 insertions, 5 deletions
@@ -48,7 +48,7 @@ typedef struct u32 reload; u32 prescale; u32 stop_cpu_ticks; - fixed16_16 frequency_step; + fixed8_24 frequency_step; timer_ds_channel_type direct_sound_channels; timer_irq_type irq; timer_status_type status; @@ -132,8 +132,7 @@ static u32 prescale_table[] = { 0, 6, 8, 10 }; if(timer[timer_number].direct_sound_channels & (0x01 << channel)) \ { \ direct_sound_channel[channel].buffer_index = \ - (direct_sound_channel[channel].buffer_index + buffer_adjust) % \ - BUFFER_SIZE; \ + (gbc_sound_buffer_index + buffer_adjust) % BUFFER_SIZE; \ } \ #define trigger_timer(timer_number) \ @@ -164,8 +163,8 @@ static u32 prescale_table[] = { 0, 6, 8, 10 }; if(timer_number < 2) \ { \ u32 buffer_adjust = \ - (u32)(((float)(cpu_ticks - timer[timer_number].stop_cpu_ticks) * \ - sound_frequency) / 16777216.0) * 2; \ + (u32)(((float)(cpu_ticks - gbc_sound_last_cpu_ticks) * \ + sound_frequency) / GBC_BASE_RATE) * 2; \ \ sound_update_frequency_step(timer_number); \ adjust_sound_buffer(timer_number, 0); \ |