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Fix audio glitching at the end of a voice because of bad non-looping sound handling in AXWii

This commit is contained in:
Pierre Bourdon 2013-03-29 21:02:27 +01:00
parent e9b236be05
commit ef501137be
1 changed files with 45 additions and 30 deletions
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75
Source/Core/Core/Src/HW/DSPHLE/UCodes/UCode_AX_Voice.h
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@ -147,6 +147,7 @@ void DumpPB(const PB_TYPE& pb)
static u32 acc_loop_addr, acc_end_addr;
static u32* acc_cur_addr;
static PB_TYPE* acc_pb;
static bool acc_end_reached;
// Sets up the simulated accelerator.
void AcceleratorSetup(PB_TYPE* pb, u32* cur_addr)
@ -155,6 +156,7 @@ void AcceleratorSetup(PB_TYPE* pb, u32* cur_addr)
acc_loop_addr = HILO_TO_32(pb->audio_addr.loop_addr);
acc_end_addr = HILO_TO_32(pb->audio_addr.end_addr);
acc_cur_addr = cur_addr;
acc_end_reached = false;
}
// Reads a sample from the simulated accelerator. Also handles looping and
@ -164,6 +166,49 @@ u16 AcceleratorGetSample()
{
u16 ret;
// Have we reached the end address?
//
// On real hardware, this would raise an interrupt that is handled by the
// UCode. We simulate what this interrupt does here.
if ((*acc_cur_addr & ~1) == (acc_end_addr & ~1))
{
// loop back to loop_addr.
*acc_cur_addr = acc_loop_addr;
if (acc_pb->audio_addr.looping)
{
// Set the ADPCM infos to continue processing at loop_addr.
//
// For some reason, yn1 and yn2 aren't set if the voice is not of
// stream type. This is what the AX UCode does and I don't really
// know why.
acc_pb->adpcm.pred_scale = acc_pb->adpcm_loop_info.pred_scale;
if (!acc_pb->is_stream)
{
acc_pb->adpcm.yn1 = acc_pb->adpcm_loop_info.yn1;
acc_pb->adpcm.yn2 = acc_pb->adpcm_loop_info.yn2;
}
}
else
{
// Non looping voice reached the end -> running = 0.
acc_pb->running = 0;
#ifdef AX_WII
// One of the few meaningful differences between AXGC and AXWii:
// while AXGC handles non looping voices ending by having 0000
// samples at the loop address, AXWii has the 0000 samples
// internally in DRAM and use an internal pointer to it (loop addr
// does not contain 0000 samples on AXWii!).
acc_end_reached = true;
#endif
}
}
// See above for explanations about acc_end_reached.
if (acc_end_reached)
return 0;
switch (acc_pb->audio_addr.sample_format)
{
case 0x00: // ADPCM
@ -219,36 +264,6 @@ u16 AcceleratorGetSample()
return 0;
}
// Have we reached the end address?
//
// On real hardware, this would raise an interrupt that is handled by the
// UCode. We simulate what this interrupt does here.
if ((*acc_cur_addr & ~1) == (acc_end_addr & ~1))
{
// loop back to loop_addr.
*acc_cur_addr = acc_loop_addr;
if (acc_pb->audio_addr.looping)
{
// Set the ADPCM infos to continue processing at loop_addr.
//
// For some reason, yn1 and yn2 aren't set if the voice is not of
// stream type. This is what the AX UCode does and I don't really
// know why.
acc_pb->adpcm.pred_scale = acc_pb->adpcm_loop_info.pred_scale;
if (!acc_pb->is_stream)
{
acc_pb->adpcm.yn1 = acc_pb->adpcm_loop_info.yn1;
acc_pb->adpcm.yn2 = acc_pb->adpcm_loop_info.yn2;
}
}
else
{
// Non looping voice reached the end -> running = 0.
acc_pb->running = 0;
}
}
return ret;
}