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DSPHLE: zelda ucode: add some comments, a little crash safety hack

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git-svn-id: https://dolphin-emu.googlecode.com/svn/trunk@3620 8ced0084-cf51-0410-be5f-012b33b47a6e
This commit is contained in:
hrydgard 2009-06-30 06:33:17 +00:00
parent 8f4e56c61c
commit fc63424bce
1 changed files with 22 additions and 16 deletions
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38
Source/Plugins/Plugin_DSP_HLE/Src/UCodes/UCode_Zelda_Voice.cpp
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@ -145,8 +145,7 @@ void CUCode_Zelda::MixAddVoice_AFC(ZeldaVoicePB &PB, s32* _Buffer, int _Size)
PB.YN2 = 0x00; // history1
PB.YN1 = 0x00; // history2
// samplerate? length? num of samples? i dunno...
// Likely length...
// Length in samples.
PB.RemLength = PB.Length;
// Copy ARAM addr from r to rw area.
@ -164,8 +163,11 @@ void CUCode_Zelda::MixAddVoice_AFC(ZeldaVoicePB &PB, s32* _Buffer, int _Size)
u32 sampleCount = 0;
u8 *source;
if (m_CRC == 0xD643001F)
u32 ram_mask = 1024 * 1024 * 16 - 1;
if (m_CRC == 0xD643001F) {
source = g_dspInitialize.pGetMemoryPointer(m_DMABaseAddr);
ram_mask = 1024 * 1024 * 64 - 1;
}
else
source = g_dspInitialize.pGetARAMPointer();
@ -192,6 +194,7 @@ restart:
else
{
// This needs adjustment. It's not right for AFC, was just copied from PCM16.
// We should also probably reinitialize YN1 and YN2 with something - but with what?
PB.RestartPos = PB.LoopStartPos;
PB.RemLength = PB.Length - PB.RestartPos;
PB.CurAddr = PB.StartAddr + (PB.RestartPos << 1);
@ -206,7 +209,7 @@ restart:
u32 prev_addr = PB.CurAddr;
// Prefill the decode buffer.
AFCdecodebuffer(m_AFCCoefTable, (char*)(source + PB.CurAddr), outbuf, (short*)&PB.YN2, (short*)&PB.YN1, 9);
AFCdecodebuffer(m_AFCCoefTable, (char*)(source + (PB.CurAddr & ram_mask)), outbuf, (short*)&PB.YN2, (short*)&PB.YN1, 9);
PB.CurAddr += 9;
s64 TrueSamplePosition = (s64)(PB.Length - PB.RemLength) << 32;
@ -238,7 +241,7 @@ restart:
prev_yn2 = PB.YN2;
prev_addr = PB.CurAddr;
AFCdecodebuffer(m_AFCCoefTable, (char*)(source + PB.CurAddr), outbuf, (short*)&PB.YN2, (short*)&PB.YN1, 9);
AFCdecodebuffer(m_AFCCoefTable, (char*)(source + (PB.CurAddr & ram_mask)), outbuf, (short*)&PB.YN2, (short*)&PB.YN1, 9);
PB.CurAddr += 9;
}
}
@ -278,24 +281,26 @@ void CUCode_Zelda::MixAddVoice(ZeldaVoicePB &PB, s32* _LeftBuffer, s32* _RightBu
{
switch (PB.Format)
{
case 0x0000: // Silences sound and stops all looping sounds
for (int i = 0; i < _Size; i++)
_LeftBuffer[i] = _RightBuffer[i] = 0;
return;
case 0x0005: // AFC / unknown
case 0x0009: // AFC / ADPCM
// AFC formats
case 0x0005: // AFC with extra low bitrate (32:5 compression). Not yet seen.
WARN_LOG(DSPHLE, "5 byte AFC - does it work?");
case 0x0009: // AFC with normal bitrate (32:9 compression).
MixAddVoice_AFC(PB, m_TempBuffer, _Size);
break;
case 0x0010: // PCM16
case 0x0010: // PCM16 - normal PCM 16-bit audio.
MixAddVoice_PCM16(PB, m_TempBuffer, _Size);
break;
// Cases we're missing: 0x0008, 0x0020, 0x0021
case 0x0008:
// These are "synth" formats - square wave, saw wave etc.
case 0x0000:
case 0x0001: // Used for "Denied" sound in Zelda
case 0x0002:
return;
case 0x0008: // Likely PCM8 - normal PCM 8-bit audio. Used in Mario Kart DD.
case 0x0020:
case 0x0021:
case 0x0021: // Important for Zelda WW. Really need to implement - missing it causes hangs.
WARN_LOG(DSPHLE, "Unimplemented MixAddVoice format in zelda %04x", PB.Format);
break;
@ -305,6 +310,7 @@ void CUCode_Zelda::MixAddVoice(ZeldaVoicePB &PB, s32* _LeftBuffer, s32* _RightBu
break;
}
// Necessary for SMG, not for Zelda. Weird.
PB.NeedsReset = 0;
}