diff options
Diffstat (limited to 'Source/Core/DSPCore/Src/DSPAccelerator.cpp')
| -rw-r--r-- | Source/Core/DSPCore/Src/DSPAccelerator.cpp | 176 |
1 files changed, 0 insertions, 176 deletions
diff --git a/Source/Core/DSPCore/Src/DSPAccelerator.cpp b/Source/Core/DSPCore/Src/DSPAccelerator.cpp deleted file mode 100644 index a45ab15e9d..0000000000 --- a/Source/Core/DSPCore/Src/DSPAccelerator.cpp +++ /dev/null @@ -1,176 +0,0 @@ -// Copyright (C) 2003 Dolphin Project. - -// This program is free software: you can redistribute it and/or modify -// it under the terms of the GNU General Public License as published by -// the Free Software Foundation, version 2.0. - -// This program is distributed in the hope that it will be useful, -// but WITHOUT ANY WARRANTY; without even the implied warranty of -// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the -// GNU General Public License 2.0 for more details. - -// A copy of the GPL 2.0 should have been included with the program. -// If not, see http://www.gnu.org/licenses/ - -// Official SVN repository and contact information can be found at -// http://code.google.com/p/dolphin-emu/ - -#include "Common.h" - -#include "DSPCore.h" -#include "DSPHost.h" -#include "DSPHWInterface.h" -#include "DSPInterpreter.h" - -// The hardware adpcm decoder :) -static s16 ADPCM_Step(u32& _rSamplePos) -{ - const s16 *pCoefTable = (const s16 *)&g_dsp.ifx_regs[DSP_COEF_A1_0]; - - if (((_rSamplePos) & 15) == 0) - { - g_dsp.ifx_regs[DSP_PRED_SCALE] = DSPHost_ReadHostMemory((_rSamplePos & ~15) >> 1); - _rSamplePos += 2; - } - - int scale = 1 << (g_dsp.ifx_regs[DSP_PRED_SCALE] & 0xF); - int coef_idx = (g_dsp.ifx_regs[DSP_PRED_SCALE] >> 4) & 0x7; - - s32 coef1 = pCoefTable[coef_idx * 2 + 0]; - s32 coef2 = pCoefTable[coef_idx * 2 + 1]; - - int temp = (_rSamplePos & 1) ? - (DSPHost_ReadHostMemory(_rSamplePos >> 1) & 0xF) : - (DSPHost_ReadHostMemory(_rSamplePos >> 1) >> 4); - - if (temp >= 8) - temp -= 16; - - // 0x400 = 0.5 in 11-bit fixed point - int val = (scale * temp) + ((0x400 + coef1 * (s16)g_dsp.ifx_regs[DSP_YN1] + coef2 * (s16)g_dsp.ifx_regs[DSP_YN2]) >> 11); - - // Clamp values. - if (val > 0x7FFF) - val = 0x7FFF; - else if (val < -0x7FFF) - val = -0x7FFF; - - g_dsp.ifx_regs[DSP_YN2] = g_dsp.ifx_regs[DSP_YN1]; - g_dsp.ifx_regs[DSP_YN1] = val; - - _rSamplePos++; - - // The advanced interpolation (linear, polyphase,...) is done by the UCode, - // so we don't need to bother with it here. - return val; -} - -u16 dsp_read_aram_d3() -{ - // Zelda ucode reads ARAM through 0xffd3. - const u32 EndAddress = (g_dsp.ifx_regs[DSP_ACEAH] << 16) | g_dsp.ifx_regs[DSP_ACEAL]; - u32 Address = (g_dsp.ifx_regs[DSP_ACCAH] << 16) | g_dsp.ifx_regs[DSP_ACCAL]; - u16 val = 0; - - switch (g_dsp.ifx_regs[DSP_FORMAT]) { - case 0x5: // u8 reads - val = DSPHost_ReadHostMemory(Address); - Address++; - break; - case 0x6: // u16 reads - val = (DSPHost_ReadHostMemory(Address*2) << 8) | DSPHost_ReadHostMemory(Address*2 + 1); - Address++; - break; - default: - ERROR_LOG(DSPLLE, "dsp_read_aram_d3() - unknown format 0x%x", g_dsp.ifx_regs[DSP_FORMAT]); - break; - } - - if (Address >= EndAddress) - { - // Set address back to start address. (never seen this here!) - Address = (g_dsp.ifx_regs[DSP_ACSAH] << 16) | g_dsp.ifx_regs[DSP_ACSAL]; - } - - g_dsp.ifx_regs[DSP_ACCAH] = Address >> 16; - g_dsp.ifx_regs[DSP_ACCAL] = Address & 0xffff; - return val; -} - -void dsp_write_aram_d3(u16 value) -{ - // Zelda ucode writes a bunch of zeros to ARAM through d3 during - // initialization. Don't know if it ever does it later, too. - u32 Address = (g_dsp.ifx_regs[DSP_ACCAH] << 16) | g_dsp.ifx_regs[DSP_ACCAL]; - - switch (g_dsp.ifx_regs[DSP_FORMAT]) { - case 0xA: // u16 writes - DSPHost_WriteHostMemory(value >> 8, Address*2); - DSPHost_WriteHostMemory(value & 0xFF, Address*2 + 1); - Address++; - break; - default: - ERROR_LOG(DSPLLE, "dsp_write_aram_d3() - unknown format 0x%x", g_dsp.ifx_regs[DSP_FORMAT]); - break; - } - - g_dsp.ifx_regs[DSP_ACCAH] = Address >> 16; - g_dsp.ifx_regs[DSP_ACCAL] = Address & 0xffff; -} - -u16 dsp_read_accelerator() -{ - const u32 EndAddress = (g_dsp.ifx_regs[DSP_ACEAH] << 16) | g_dsp.ifx_regs[DSP_ACEAL]; - u32 Address = (g_dsp.ifx_regs[DSP_ACCAH] << 16) | g_dsp.ifx_regs[DSP_ACCAL]; - u16 val; - - // let's do the "hardware" decode DSP_FORMAT is interesting - the Zelda - // ucode seems to indicate that the bottom two bits specify the "read size" - // and the address multiplier. The bits above that may be things like sign - // extention and do/do not use ADPCM. It also remains to be figured out - // whether there's a difference between the usual accelerator "read - // address" and 0xd3. - switch (g_dsp.ifx_regs[DSP_FORMAT]) - { - case 0x00: // ADPCM audio - val = ADPCM_Step(Address); - break; - case 0x0A: // 16-bit PCM audio - val = (DSPHost_ReadHostMemory(Address*2) << 8) | DSPHost_ReadHostMemory(Address*2 + 1); - g_dsp.ifx_regs[DSP_YN2] = g_dsp.ifx_regs[DSP_YN1]; - g_dsp.ifx_regs[DSP_YN1] = val; - Address++; - break; - case 0x19: // 8-bit PCM audio - val = DSPHost_ReadHostMemory(Address) << 8; - g_dsp.ifx_regs[DSP_YN2] = g_dsp.ifx_regs[DSP_YN1]; - g_dsp.ifx_regs[DSP_YN1] = val; - Address++; - break; - default: - ERROR_LOG(DSPLLE, "dsp_read_accelerator() - unknown format 0x%x", g_dsp.ifx_regs[DSP_FORMAT]); - Address++; - val = 0; - break; - } - - // TODO: Take GAIN into account - // adpcm = 0, pcm8 = 0x100, pcm16 = 0x800 - // games using pcm8 : Phoenix Wright Ace Attorney (Wiiware), Megaman 9-10 (WiiWare) - // games using pcm16: gc sega games, ... - - // Check for loop. - // Somehow, YN1 and YN2 must be initialized with their "loop" values, - // so yeah, it seems likely that we should raise an exception to let - // the DSP program do that, at least if DSP_FORMAT == 0x0A. - if (Address >= EndAddress) - { - // Set address back to start address. - Address = (g_dsp.ifx_regs[DSP_ACSAH] << 16) | g_dsp.ifx_regs[DSP_ACSAL]; - DSPCore_SetException(EXP_ACCOV); - } - - g_dsp.ifx_regs[DSP_ACCAH] = Address >> 16; - g_dsp.ifx_regs[DSP_ACCAL] = Address & 0xffff; - return val; -} |