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https://github.com/libretro/scummvm.git
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757 lines
22 KiB
C++
757 lines
22 KiB
C++
/* ScummVM - Graphic Adventure Engine
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*
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* ScummVM is the legal property of its developers, whose names
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* are too numerous to list here. Please refer to the COPYRIGHT
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* file distributed with this source distribution.
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version 2
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* of the License, or (at your option) any later version.
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
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*
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*/
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/*
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* The PSG_HuC6280 class is based on the HuC6280 sound chip emulator
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* by Charles MacDonald (E-mail: cgfm2@hotmail.com, WWW: http://cgfm2.emuviews.com)
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* The implementation used here was taken from MESS (http://www.mess.org/)
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* the Multiple Emulator Super System (sound/c6280.c).
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* LFO and noise channel support have been removed (not used by Loom PCE).
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*/
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#include <math.h>
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#include "player_pce.h"
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#include "common/endian.h"
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// PCE sound engine is only used by Loom, which requires 16bit color support
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#ifdef USE_RGB_COLOR
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namespace Scumm {
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// CPU and PSG use the same base clock but with a different divider
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const double MASTER_CLOCK = 21477270.0; // ~21.48 MHz
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const double CPU_CLOCK = MASTER_CLOCK / 3; // ~7.16 MHz
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const double PSG_CLOCK = MASTER_CLOCK / 6; // ~3.58 MHz
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const double TIMER_CLOCK = CPU_CLOCK / 1024; // ~6.9 kHz
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// The PSG update routine is originally triggered by the timer IRQ (not by VSYNC)
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// approx. 120 times per second (TIML=0x39). But as just every second call is used
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// to update the PSG we will call the update routine approx. 60 times per second.
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const double UPDATE_FREQ = TIMER_CLOCK / (57 + 1) / 2; // ~60 Hz
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// $AFA5
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static const byte wave_table[7][32] = {
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{ // sine
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0x10, 0x19, 0x1C, 0x1D, 0x1E, 0x1F, 0x1F, 0x1F, 0x1F, 0x1F, 0x1F, 0x1F, 0x1E, 0x1D, 0x1C, 0x19,
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0x10, 0x05, 0x02, 0x01, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x01, 0x02, 0x05,
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}, { // mw-shaped
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0x10, 0x1C, 0x1D, 0x1E, 0x1E, 0x1F, 0x1F, 0x1E, 0x1C, 0x1E, 0x1F, 0x1F, 0x1E, 0x1E, 0x1D, 0x1C,
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0x10, 0x03, 0x02, 0x01, 0x01, 0x00, 0x00, 0x01, 0x03, 0x01, 0x00, 0x00, 0x01, 0x01, 0x02, 0x03,
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}, { // square
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0x1E, 0x1E, 0x1E, 0x1E, 0x1E, 0x1E, 0x1E, 0x1E, 0x1E, 0x1E, 0x1E, 0x1E, 0x1E, 0x1E, 0x1E, 0x1E,
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0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01,
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}, { // triangle
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0x10, 0x0C, 0x08, 0x04, 0x01, 0x04, 0x08, 0x0C, 0x10, 0x14, 0x18, 0x1C, 0x1F, 0x1C, 0x18, 0x14,
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0x10, 0x0C, 0x08, 0x04, 0x01, 0x04, 0x08, 0x0C, 0x10, 0x14, 0x18, 0x1C, 0x1F, 0x1C, 0x18, 0x14,
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}, { // saw-tooth
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0x00, 0x01, 0x02, 0x03, 0x04, 0x06, 0x06, 0x07, 0x08, 0x09, 0x0A, 0x0B, 0x0C, 0x0D, 0x0E, 0x0F,
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0x10, 0x11, 0x12, 0x13, 0x14, 0x15, 0x16, 0x17, 0x18, 0x19, 0x1A, 0x1B, 0x1C, 0x1D, 0x1E, 0x1F,
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}, { // sigmoid
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0x07, 0x09, 0x0A, 0x0B, 0x0C, 0x0D, 0x0E, 0x0F, 0x1F, 0x1F, 0x1E, 0x1D, 0x1C, 0x1B, 0x1A, 0x19,
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0x08, 0x06, 0x05, 0x03, 0x02, 0x01, 0x00, 0x00, 0x0F, 0x0F, 0x10, 0x11, 0x12, 0x13, 0x14, 0x16,
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}, { // MW-shaped
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0x1F, 0x1E, 0x1D, 0x1D, 0x1C, 0x1A, 0x17, 0x0F, 0x0F, 0x17, 0x1A, 0x1C, 0x1D, 0x1D, 0x1E, 0x1F,
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0x00, 0x01, 0x02, 0x02, 0x03, 0x05, 0x08, 0x0F, 0x0F, 0x08, 0x05, 0x03, 0x02, 0x02, 0x01, 0x00
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}
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};
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// AEBC
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static const int control_offsets[14] = {
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0, 7, 20, 33, 46, 56, 75, 88, 116, 126, 136, 152, 165, 181
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};
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// AED8
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static const byte control_data[205] = {
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/* 0*/ 0xF0, 0x00, 0xF8, 0x01, 0x00, 0x00, 0xFF,
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/* 7*/ 0xF0, 0x00, 0xF8, 0x01, 0x00, 0x00, 0x01, 0x00, 0xF0, 0x3A, 0x00, 0xFD, 0xFF,
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/* 20*/ 0xF0, 0x00, 0xF8, 0x01, 0x00, 0x00, 0x01, 0x00, 0xF0, 0x1D, 0x00, 0xF8, 0xFF,
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/* 33*/ 0xF0, 0x00, 0xF8, 0x01, 0x00, 0x00, 0x02, 0x00, 0xF0, 0x1E, 0x00, 0xFC, 0xFF,
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/* 46*/ 0xF0, 0x00, 0xF8, 0x01, 0x00, 0x00, 0x07, 0x00, 0xE0, 0xFF,
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/* 56*/ 0xF0, 0x00, 0xF8, 0x01, 0x00, 0x00, 0x01, 0x00, 0xD8, 0xF0, 0x00, 0xD8, 0x01, 0x00, 0x00, 0x04, 0x00, 0xF0, 0xFF,
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/* 75*/ 0xF0, 0x00, 0xF8, 0x01, 0x00, 0x00, 0x03, 0x00, 0xF8, 0x6E, 0x00, 0xFF, 0xFF,
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/* 88*/ 0xF0, 0x00, 0xF8, 0x01, 0x00, 0x00, 0x08, 0x00, 0xF0, 0xF0, 0x00, 0xD0, 0x01, 0x00, 0x00, 0x05, 0x00, 0xF0, 0xF0, 0x00, 0xB8, 0xE6, 0x80, 0xFF, 0xE6, 0x80, 0xFF, 0xFF,
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/*116*/ 0xF0, 0x00, 0xF8, 0x01, 0x00, 0x00, 0x05, 0x00, 0xD0, 0xFF,
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/*126*/ 0xF0, 0x00, 0xF8, 0x01, 0x00, 0x00, 0x04, 0x00, 0xF8, 0xFF,
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/*136*/ 0xF0, 0x00, 0xF8, 0x01, 0x00, 0x00, 0x03, 0x00, 0xF4, 0xE6, 0xC0, 0xFF, 0xE6, 0xC0, 0xFF, 0xFF,
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/*152*/ 0xF0, 0x00, 0xD0, 0x01, 0x00, 0x00, 0x02, 0x00, 0x10, 0x0E, 0x00, 0xFE, 0xFF,
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/*165*/ 0xF0, 0x00, 0xA8, 0x01, 0x00, 0x00, 0x18, 0x00, 0x02, 0xE6, 0x80, 0xFE, 0xE6, 0xC0, 0xFF, 0xFF,
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/*181*/ 0xF0, 0x00, 0xF8, 0x01, 0x00, 0x00, 0x02, 0x00, 0xF8, 0x02, 0x00, 0x00, 0x02, 0x00, 0xF0, 0x01, 0x00, 0xF8, 0x02, 0x00, 0x08, 0xF1, 0x99, 0xAF
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};
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static const uint16 lookup_table[87] = {
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0x0D40, 0x0C80, 0x0BC0, 0x0B20, 0x0A80, 0x09E0, 0x0940, 0x08C0,
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0x0840, 0x07E0, 0x0760, 0x0700, 0x06A0, 0x0640, 0x05E0, 0x0590,
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0x0540, 0x04F0, 0x04A0, 0x0460, 0x0420, 0x03F0, 0x03B0, 0x0380,
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0x0350, 0x0320, 0x02F0, 0x02C8, 0x02A0, 0x0278, 0x0250, 0x0230,
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0x0210, 0x01F8, 0x01D8, 0x01C0, 0x01A8, 0x0190, 0x0178, 0x0164,
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0x0150, 0x013C, 0x0128, 0x0118, 0x0108, 0x00FC, 0x00EC, 0x00E0,
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0x00D4, 0x00C8, 0x00BC, 0x00B2, 0x00A8, 0x009E, 0x0094, 0x008C,
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0x0084, 0x007E, 0x0076, 0x0070, 0x006A, 0x0064, 0x005E, 0x0059,
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0x0054, 0x004F, 0x004A, 0x0046, 0x0042, 0x003F, 0x003B, 0x0038,
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0x0035, 0x0032, 0x0030, 0x002D, 0x002A, 0x0028, 0x0026, 0x0024,
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0x0022, 0x0020, 0x001E, 0x001C, 0x001B, 0x8E82, 0xB500
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};
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// B27B
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static const uint16 freq_offset[3] = {
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0, 2, 9
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};
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static const uint16 freq_table[] = {
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0x0000, 0x0800,
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0xFFB0, 0xFFD1, 0xFFE8, 0xFFF1, 0x0005, 0x0000, 0x0800,
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0xFF9C, 0xFFD8, 0x0000, 0x000F, 0x0005, 0x0000, 0x0800
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};
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static const int sound_table[13] = {
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0, 2, 3, 4, 5, 6, 7, 8, 9, 11, 1, 10, 11
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};
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// 0xAE12
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// Note:
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// - offsets relative to data_table
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// - byte one of each sound was always 0x3F (= use all channels) -> removed from table
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static const uint16 sounds[13][6] = {
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{ 481, 481, 481, 481, 481, 481 },
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{ 395, 408, 467, 480, 480, 480 },
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{ 85, 96, 109, 109, 109, 109 },
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{ 110, 121, 134, 134, 134, 134 },
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{ 135, 146, 159, 159, 159, 159 },
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{ 160, 171, 184, 184, 184, 184 },
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{ 185, 196, 209, 209, 209, 209 },
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{ 210, 221, 234, 234, 234, 234 },
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{ 235, 246, 259, 259, 259, 259 },
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{ 260, 271, 284, 284, 284, 284 },
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{ 285, 298, 311, 324, 335, 348 },
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{ 349, 360, 361, 362, 373, 384 },
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{ 0, 84, 84, 84, 84, 84 } // unused
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};
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// 0xB2A1
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static const byte data_table[482] = {
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/* 0*/ 0xE2, 0x0A, 0xE1, 0x0D, 0xE6, 0xED, 0xE0, 0x0F, 0xE2, 0x00, 0xE1, 0x00,
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0xF2, 0xF2, 0xB2, 0xE1, 0x01, 0xF2, 0xF2, 0xB2, 0xE1, 0x02, 0xF2, 0xF2,
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0xB2, 0xE1, 0x03, 0xF2, 0xF2, 0xB2, 0xE1, 0x04, 0xF2, 0xF2, 0xB2, 0xE1,
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0x05, 0xF2, 0xF2, 0xB2, 0xE1, 0x06, 0xF2, 0xF2, 0xB2, 0xE1, 0x07, 0xF2,
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0xF2, 0xB2, 0xE1, 0x08, 0xF2, 0xF2, 0xB2, 0xE1, 0x09, 0xF2, 0xF2, 0xB2,
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0xE1, 0x0A, 0xF2, 0xF2, 0xB2, 0xE1, 0x0B, 0xF2, 0xF2, 0xB2, 0xE1, 0x0C,
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0xF2, 0xF2, 0xB2, 0xE1, 0x0D, 0xF2, 0xF2, 0xB2, 0xFF, 0xD1, 0x03, 0xF3,
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/* 84*/ 0xFF,
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/* 85*/ 0xE2, 0x0C, 0xE1, 0x02, 0xE0, 0x0F, 0xE6, 0xED, 0xD3, 0x07, 0xFF,
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/* 96*/ 0xE2, 0x06, 0xE1, 0x02, 0xE0, 0x0F, 0xE6, 0xED, 0xD4, 0xF0, 0x0C, 0x07, 0xFF,
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/*109*/ 0xFF,
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/*110*/ 0xE2, 0x0C, 0xE1, 0x02, 0xE0, 0x0F, 0xE6, 0xED, 0xD3, 0x27, 0xFF,
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/*121*/ 0xE2, 0x06, 0xE1, 0x02, 0xE0, 0x0F, 0xE6, 0xED, 0xD4, 0xF0, 0x0C, 0x27, 0xFF,
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/*134*/ 0xFF,
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/*135*/ 0xE2, 0x0C, 0xE1, 0x02, 0xE0, 0x0F, 0xE6, 0xED, 0xD3, 0x47, 0xFF,
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/*146*/ 0xE2, 0x06, 0xE1, 0x02, 0xE0, 0x0F, 0xE6, 0xED, 0xD4, 0xF0, 0x0C, 0x47, 0xFF,
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/*159*/ 0xFF,
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/*160*/ 0xE2, 0x0C, 0xE1, 0x02, 0xE0, 0x0F, 0xE6, 0xED, 0xD3, 0x57, 0xFF,
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/*171*/ 0xE2, 0x06, 0xE1, 0x02, 0xE0, 0x0F, 0xE6, 0xED, 0xD4, 0xF0, 0x0C, 0x57, 0xFF,
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/*184*/ 0xFF,
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/*185*/ 0xE2, 0x0C, 0xE1, 0x02, 0xE0, 0x0F, 0xE6, 0xED, 0xD3, 0x77, 0xFF,
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/*196*/ 0xE2, 0x06, 0xE1, 0x02, 0xE0, 0x0F, 0xE6, 0xED, 0xD4, 0xF0, 0x0C, 0x77, 0xFF,
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/*209*/ 0xFF,
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/*210*/ 0xE2, 0x0C, 0xE1, 0x02, 0xE0, 0x0F, 0xE6, 0xED, 0xD3, 0x97, 0xFF,
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/*221*/ 0xE2, 0x06, 0xE1, 0x02, 0xE0, 0x0F, 0xE6, 0xED, 0xD4, 0xF0, 0x0C, 0x97, 0xFF,
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/*234*/ 0xFF,
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/*235*/ 0xE2, 0x0C, 0xE1, 0x02, 0xE0, 0x0F, 0xE6, 0xED, 0xD3, 0xB7, 0xFF,
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/*246*/ 0xE2, 0x06, 0xE1, 0x02, 0xE0, 0x0F, 0xE6, 0xED, 0xD4, 0xF0, 0x0C, 0xB7, 0xFF,
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/*259*/ 0xFF,
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/*260*/ 0xE2, 0x0C, 0xE1, 0x02, 0xE0, 0x0F, 0xE6, 0xED, 0xD4, 0x07, 0xFF,
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/*271*/ 0xE2, 0x06, 0xE1, 0x02, 0xE0, 0x0F, 0xE6, 0xED, 0xD5, 0xF0, 0x0C, 0x07, 0xFF,
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/*284*/ 0xFF,
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/*285*/ 0xE2, 0x0B, 0xE1, 0x04, 0xE6, 0xED, 0xE0, 0x0A, 0xD0, 0xDB, 0x14, 0x0E, 0xFF,
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/*298*/ 0xE2, 0x0B, 0xE1, 0x04, 0xE6, 0xED, 0xE0, 0x0A, 0xD0, 0xDB, 0x32, 0x1E, 0xFF,
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/*311*/ 0xE2, 0x0B, 0xE1, 0x0B, 0xE6, 0xED, 0xE0, 0x0A, 0xD0, 0xDB, 0x50, 0x1E, 0xFF,
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/*324*/ 0xE2, 0x0B, 0xE1, 0x0B, 0xE6, 0xED, 0xE0, 0x0A, 0xD0, 0x0E, 0xFF,
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/*335*/ 0xE2, 0x0B, 0xE1, 0x02, 0xE6, 0xED, 0xE0, 0x0A, 0xD0, 0xDB, 0x0A, 0x0E, 0xFF,
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/*348*/ 0xFF,
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/*349*/ 0xE2, 0x03, 0xE1, 0x01, 0xE6, 0xED, 0xE0, 0x06, 0xD6, 0x17, 0xFF,
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/*360*/ 0xFF,
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/*361*/ 0xFF,
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/*362*/ 0xE2, 0x04, 0xE1, 0x04, 0xE6, 0xED, 0xE0, 0x06, 0xD5, 0xA7, 0xFF,
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/*373*/ 0xE2, 0x03, 0xE1, 0x06, 0xE6, 0xED, 0xE0, 0x06, 0xD6, 0x37, 0xFF,
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/*384*/ 0xE2, 0x04, 0xE1, 0x06, 0xE6, 0xED, 0xE0, 0x06, 0xD3, 0x87, 0xFF,
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/*395*/ 0xE2, 0x0C, 0xE1, 0x00, 0xE0, 0x04, 0xE6, 0xED, 0xD4, 0x0B, 0xE8, 0x0B, 0xFF,
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/*408*/ 0xE2, 0x0C, 0xE1, 0x03, 0xE0, 0x04, 0xE6, 0xED, 0xD4, 0xF0, 0x0C, 0x00,
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0xE8, 0x10, 0xE8, 0x00, 0xE8, 0x10, 0xE8, 0x00, 0xE8, 0x10, 0xE8, 0x00,
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0xE8, 0x10, 0xE8, 0x00, 0xE8, 0x10, 0xE8, 0x00, 0xE8, 0x10, 0xE8, 0x00,
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0xE8, 0x10, 0xE8, 0x00, 0xE8, 0x10, 0xE8, 0x00, 0xE8, 0x10, 0xE8, 0x00,
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0xE8, 0x10, 0xE8, 0x00, 0xE8, 0x10, 0xE8, 0x00, 0xE8, 0x10, 0xFF,
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/*467*/ 0xE2, 0x0C, 0xE1, 0x00, 0xE0, 0x04, 0xE6, 0xED, 0xD4, 0x1B, 0xE8, 0x1B, 0xFF,
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/*480*/ 0xFF,
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/*481*/ 0xFF
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};
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/*
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* PSG_HuC6280
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*/
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class PSG_HuC6280 {
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private:
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typedef struct {
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uint16 frequency;
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uint8 control;
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uint8 balance;
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uint8 waveform[32];
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uint8 index;
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int16 dda;
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uint32 counter;
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} channel_t;
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double _clock;
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double _rate;
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uint8 _select;
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uint8 _balance;
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channel_t _channel[8];
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int16 _volumeTable[32];
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uint32 _noiseFreqTable[32];
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uint32 _waveFreqTable[4096];
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public:
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void init();
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void reset();
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void write(int offset, byte data);
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void update(int16* samples, int sampleCnt);
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PSG_HuC6280(double clock, double samplerate);
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};
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PSG_HuC6280::PSG_HuC6280(double clock, double samplerate) {
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_clock = clock;
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_rate = samplerate;
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// Initialize PSG_HuC6280 emulator
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init();
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}
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void PSG_HuC6280::init() {
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int i;
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double step;
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// Loudest volume level for table
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double level = 65535.0 / 6.0 / 32.0;
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// Clear context
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reset();
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// Make waveform frequency table
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for(i = 0; i < 4096; i++) {
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step = ((_clock / _rate) * 4096) / (i+1);
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_waveFreqTable[(1 + i) & 0xFFF] = (uint32)step;
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}
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// Make noise frequency table
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for(i = 0; i < 32; i++) {
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step = ((_clock / _rate) * 32) / (i+1);
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_noiseFreqTable[i] = (uint32)step;
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}
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// Make volume table
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// PSG_HuC6280 has 48dB volume range spread over 32 steps
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step = 48.0 / 32.0;
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for(i = 0; i < 31; i++) {
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_volumeTable[i] = (uint16)level;
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level /= pow(10.0, step / 20.0);
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}
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_volumeTable[31] = 0;
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}
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|
|
|
void PSG_HuC6280::reset() {
|
|
_select = 0;
|
|
_balance = 0xFF;
|
|
memset(_channel, 0, sizeof(_channel));
|
|
memset(_volumeTable, 0, sizeof(_volumeTable));
|
|
memset(_noiseFreqTable, 0, sizeof(_noiseFreqTable));
|
|
memset(_waveFreqTable, 0, sizeof(_waveFreqTable));
|
|
}
|
|
|
|
void PSG_HuC6280::write(int offset, byte data) {
|
|
channel_t *chan = &_channel[_select];
|
|
|
|
switch(offset & 0x0F) {
|
|
case 0x00: // Channel select
|
|
_select = data & 0x07;
|
|
break;
|
|
|
|
case 0x01: // Global balance
|
|
_balance = data;
|
|
break;
|
|
|
|
case 0x02: // Channel frequency (LSB)
|
|
chan->frequency = (chan->frequency & 0x0F00) | data;
|
|
chan->frequency &= 0x0FFF;
|
|
break;
|
|
|
|
case 0x03: // Channel frequency (MSB)
|
|
chan->frequency = (chan->frequency & 0x00FF) | (data << 8);
|
|
chan->frequency &= 0x0FFF;
|
|
break;
|
|
|
|
case 0x04: // Channel control (key-on, DDA mode, volume)
|
|
// 1-to-0 transition of DDA bit resets waveform index
|
|
if((chan->control & 0x40) && ((data & 0x40) == 0)) {
|
|
chan->index = 0;
|
|
}
|
|
chan->control = data;
|
|
break;
|
|
|
|
case 0x05: // Channel balance
|
|
chan->balance = data;
|
|
break;
|
|
|
|
case 0x06: // Channel waveform data
|
|
switch(chan->control & 0xC0) {
|
|
case 0x00:
|
|
chan->waveform[chan->index & 0x1F] = data & 0x1F;
|
|
chan->index = (chan->index + 1) & 0x1F;
|
|
break;
|
|
|
|
case 0x40:
|
|
break;
|
|
|
|
case 0x80:
|
|
chan->waveform[chan->index & 0x1F] = data & 0x1F;
|
|
chan->index = (chan->index + 1) & 0x1F;
|
|
break;
|
|
|
|
case 0xC0:
|
|
chan->dda = data & 0x1F;
|
|
break;
|
|
}
|
|
|
|
break;
|
|
|
|
case 0x07: // Noise control (enable, frequency)
|
|
case 0x08: // LFO frequency
|
|
case 0x09: // LFO control (enable, mode)
|
|
break;
|
|
|
|
default:
|
|
break;
|
|
}
|
|
}
|
|
|
|
void PSG_HuC6280::update(int16* samples, int sampleCnt) {
|
|
static const int scale_tab[] = {
|
|
0x00, 0x03, 0x05, 0x07, 0x09, 0x0B, 0x0D, 0x0F,
|
|
0x10, 0x13, 0x15, 0x17, 0x19, 0x1B, 0x1D, 0x1F
|
|
};
|
|
int ch;
|
|
int i;
|
|
|
|
int lmal = (_balance >> 4) & 0x0F;
|
|
int rmal = (_balance >> 0) & 0x0F;
|
|
int vll, vlr;
|
|
|
|
lmal = scale_tab[lmal];
|
|
rmal = scale_tab[rmal];
|
|
|
|
// Clear buffer
|
|
memset(samples, 0, 2 * sampleCnt * sizeof(int16));
|
|
|
|
for(ch = 0; ch < 6; ch++) {
|
|
// Only look at enabled channels
|
|
if(_channel[ch].control & 0x80) {
|
|
int lal = (_channel[ch].balance >> 4) & 0x0F;
|
|
int ral = (_channel[ch].balance >> 0) & 0x0F;
|
|
int al = _channel[ch].control & 0x1F;
|
|
|
|
lal = scale_tab[lal];
|
|
ral = scale_tab[ral];
|
|
|
|
// Calculate volume just as the patent says
|
|
vll = (0x1F - lal) + (0x1F - al) + (0x1F - lmal);
|
|
if(vll > 0x1F) vll = 0x1F;
|
|
|
|
vlr = (0x1F - ral) + (0x1F - al) + (0x1F - rmal);
|
|
if(vlr > 0x1F) vlr = 0x1F;
|
|
|
|
vll = _volumeTable[vll];
|
|
vlr = _volumeTable[vlr];
|
|
|
|
// Check channel mode
|
|
if(_channel[ch].control & 0x40) {
|
|
/* DDA mode */
|
|
for(i = 0; i < sampleCnt; i++) {
|
|
samples[2*i] += (int16)(vll * (_channel[ch].dda - 16));
|
|
samples[2*i + 1] += (int16)(vlr * (_channel[ch].dda - 16));
|
|
}
|
|
} else {
|
|
/* Waveform mode */
|
|
uint32 step = _waveFreqTable[_channel[ch].frequency];
|
|
for(i = 0; i < sampleCnt; i += 1) {
|
|
int offset;
|
|
int16 data;
|
|
offset = (_channel[ch].counter >> 12) & 0x1F;
|
|
_channel[ch].counter += step;
|
|
_channel[ch].counter &= 0x1FFFF;
|
|
data = _channel[ch].waveform[offset];
|
|
samples[2*i] += (int16)(vll * (data - 16));
|
|
samples[2*i + 1] += (int16)(vlr * (data - 16));
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
|
|
/*
|
|
* Player_PCE
|
|
*/
|
|
|
|
void Player_PCE::PSG_Write(int reg, byte data) {
|
|
_psg->write(reg, data);
|
|
}
|
|
|
|
void Player_PCE::setupWaveform(byte bank) {
|
|
const byte *ptr = wave_table[bank];
|
|
PSG_Write(4, 0x40);
|
|
PSG_Write(4, 0x00);
|
|
for (int i = 0; i < 32; ++i) {
|
|
PSG_Write(6, ptr[i]);
|
|
}
|
|
}
|
|
|
|
// A541
|
|
void Player_PCE::procA541(channel_t *channel) {
|
|
channel->soundDataPtr = NULL;
|
|
channel->controlVecShort10 = 0;
|
|
|
|
channel->controlVecShort03 = 0;
|
|
channel->controlVecShort06 = 0;
|
|
channel->controlVec8 = 0;
|
|
channel->controlVec9 = 0;
|
|
channel->controlVec10 = 0;
|
|
channel->soundUpdateCounter = 0;
|
|
channel->controlVec18 = 0;
|
|
channel->controlVec19 = 0;
|
|
channel->controlVec23 = false;
|
|
channel->controlVec24 = false;
|
|
channel->controlVec21 = 0;
|
|
|
|
channel->waveformCtrl = 0x80;
|
|
}
|
|
|
|
// A592
|
|
void Player_PCE::startSound(int sound) {
|
|
channel_t *channel;
|
|
const uint16 *ptr = sounds[sound_table[sound]];
|
|
|
|
for (int i = 0; i < 6; ++i) {
|
|
channel = &channels[i];
|
|
procA541(channel);
|
|
|
|
channel->controlVec24 = true;
|
|
channel->waveformCtrl = 0;
|
|
channel->controlVec0 = 0;
|
|
channel->controlVec19 = 0;
|
|
channel->controlVec18 = 0;
|
|
channel->soundDataPtr = &data_table[*ptr++];
|
|
}
|
|
}
|
|
|
|
// A64B
|
|
void Player_PCE::updateSound() {
|
|
for (int i = 0; i < 12; i++) {
|
|
channel_t *channel = &channels[i];
|
|
bool cond = true;
|
|
if (i < 6) {
|
|
channel->controlVec21 ^= 0xFF;
|
|
if (!channel->controlVec21)
|
|
cond = false;
|
|
}
|
|
if (cond) {
|
|
processSoundData(channel);
|
|
procAB7F(channel);
|
|
procAC24(channel);
|
|
channel->controlVec11 = (channel->controlVecShort10 >> 11) | 0x80;
|
|
channel->balance = channel->balance2;
|
|
}
|
|
}
|
|
|
|
for (int i = 0; i < 6; ++i) {
|
|
procA731(&channels[i]);
|
|
}
|
|
}
|
|
|
|
int Player_PCE::readBuffer(int16 *buffer, const int numSamples) {
|
|
int sampleCopyCnt;
|
|
int samplesLeft = numSamples;
|
|
|
|
Common::StackLock lock(_mutex);
|
|
|
|
while (true) {
|
|
// copy samples to output buffer
|
|
sampleCopyCnt = (samplesLeft < _sampleBufferCnt) ? samplesLeft : _sampleBufferCnt;
|
|
if (sampleCopyCnt > 0) {
|
|
memcpy(buffer, _sampleBuffer, sampleCopyCnt * sizeof(int16));
|
|
buffer += sampleCopyCnt;
|
|
samplesLeft -= sampleCopyCnt;
|
|
_sampleBufferCnt -= sampleCopyCnt;
|
|
}
|
|
|
|
if (samplesLeft == 0)
|
|
break;
|
|
|
|
// retrieve samples for one timer period
|
|
updateSound();
|
|
_psg->update(_sampleBuffer, _samplesPerPeriod / 2);
|
|
_sampleBufferCnt = _samplesPerPeriod;
|
|
}
|
|
|
|
// copy remaining samples to the front of the buffer
|
|
if (_sampleBufferCnt > 0) {
|
|
memmove(&_sampleBuffer[0],
|
|
&_sampleBuffer[_samplesPerPeriod - _sampleBufferCnt],
|
|
_sampleBufferCnt * sizeof(int16));
|
|
}
|
|
|
|
return numSamples;
|
|
}
|
|
|
|
void Player_PCE::procA731(channel_t *channel) {
|
|
PSG_Write(0, channel->id);
|
|
PSG_Write(2, channel->freq & 0xFF);
|
|
PSG_Write(3, (channel->freq >> 8) & 0xFF);
|
|
|
|
int tmp = channel->controlVec11;
|
|
if ((channel->controlVec11 & 0xC0) == 0x80) {
|
|
tmp = channel->controlVec11 & 0x1F;
|
|
if (tmp != 0) {
|
|
tmp -= channel->controlVec0;
|
|
if (tmp >= 0) {
|
|
tmp |= 0x80;
|
|
} else {
|
|
tmp = 0;
|
|
}
|
|
}
|
|
}
|
|
|
|
PSG_Write(5, channel->balance);
|
|
if ((channel->waveformCtrl & 0x80) == 0) {
|
|
channel->waveformCtrl |= 0x80;
|
|
PSG_Write(0, channel->id);
|
|
setupWaveform(channel->waveformCtrl & 0x7F);
|
|
}
|
|
|
|
PSG_Write(4, tmp);
|
|
}
|
|
|
|
// A793
|
|
void Player_PCE::processSoundData(channel_t *channel) {
|
|
channel->soundUpdateCounter--;
|
|
if (channel->soundUpdateCounter > 0) {
|
|
return;
|
|
}
|
|
|
|
while (true) {
|
|
const byte *ptr = channel->soundDataPtr;
|
|
byte value = (ptr ? *ptr++ : 0xFF);
|
|
if (value < 0xD0) {
|
|
int mult = (value & 0x0F) + 1;
|
|
channel->soundUpdateCounter = mult * channel->controlVec1;
|
|
value >>= 4;
|
|
procAA62(channel, value);
|
|
channel->soundDataPtr = ptr;
|
|
return;
|
|
}
|
|
|
|
// jump_table (A7F7)
|
|
switch (value - 0xD0) {
|
|
case 0: /*A85A*/
|
|
case 1: /*A85D*/
|
|
case 2: /*A861*/
|
|
case 3: /*A865*/
|
|
case 4: /*A869*/
|
|
case 5: /*A86D*/
|
|
case 6: /*A871*/
|
|
channel->controlVec2 = (value - 0xD0) * 12;
|
|
break;
|
|
case 11: /*A8A8*/
|
|
channel->controlVecShort06 = (int8)*ptr++;
|
|
break;
|
|
case 16: /*A8C2*/
|
|
channel->controlVec1 = *ptr++;
|
|
break;
|
|
case 17: /*A8CA*/
|
|
channel->waveformCtrl = *ptr++;
|
|
break;
|
|
case 18: /*A8D2*/
|
|
channel->controlVec10 = *ptr++;
|
|
break;
|
|
case 22: /*A8F2*/
|
|
value = *ptr;
|
|
channel->balance = value;
|
|
channel->balance2 = value;
|
|
ptr++;
|
|
break;
|
|
case 24: /*A905*/
|
|
channel->controlVec23 = true;
|
|
break;
|
|
case 32: /*A921*/
|
|
ptr++;
|
|
break;
|
|
case 47:
|
|
channel->controlVec24 = false;
|
|
channel->controlVec10 &= 0x7F;
|
|
channel->controlVecShort10 &= 0x00FF;
|
|
return;
|
|
default:
|
|
// unused -> ignore
|
|
break;
|
|
}
|
|
|
|
channel->soundDataPtr = ptr;
|
|
}
|
|
}
|
|
|
|
void Player_PCE::procAA62(channel_t *channel, int a) {
|
|
procACEA(channel, a);
|
|
if (channel->controlVec23) {
|
|
channel->controlVec23 = false;
|
|
return;
|
|
}
|
|
|
|
channel->controlVec18 = 0;
|
|
|
|
channel->controlVec10 |= 0x80;
|
|
int y = channel->controlVec10 & 0x7F;
|
|
channel->controlBufferPos = &control_data[control_offsets[y]];
|
|
channel->controlVec5 = 0;
|
|
}
|
|
|
|
void Player_PCE::procAB7F(channel_t *channel) {
|
|
uint16 freqValue = channel->controlVecShort02;
|
|
channel->controlVecShort02 += channel->controlVecShort03;
|
|
|
|
int pos = freq_offset[channel->controlVec19] + channel->controlVec18;
|
|
freqValue += freq_table[pos];
|
|
if (freq_table[pos + 1] != 0x0800) {
|
|
channel->controlVec18++;
|
|
}
|
|
freqValue += channel->controlVecShort06;
|
|
|
|
channel->freq = freqValue;
|
|
}
|
|
|
|
void Player_PCE::procAC24(channel_t *channel) {
|
|
if ((channel->controlVec10 & 0x80) == 0)
|
|
return;
|
|
|
|
if (channel->controlVec5 == 0) {
|
|
const byte *ctrlPtr = channel->controlBufferPos;
|
|
byte value = *ctrlPtr++;
|
|
while (value >= 0xF0) {
|
|
if (value == 0xF0) {
|
|
channel->controlVecShort10 = READ_LE_UINT16(ctrlPtr);
|
|
ctrlPtr += 2;
|
|
} else if (value == 0xFF) {
|
|
channel->controlVec10 &= 0x7F;
|
|
return;
|
|
} else {
|
|
// unused
|
|
}
|
|
value = *ctrlPtr++;
|
|
}
|
|
channel->controlVec5 = value;
|
|
channel->controlVecShort09 = READ_LE_UINT16(ctrlPtr);
|
|
ctrlPtr += 2;
|
|
channel->controlBufferPos = ctrlPtr;
|
|
}
|
|
|
|
channel->controlVecShort10 += channel->controlVecShort09;
|
|
channel->controlVec5--;
|
|
}
|
|
|
|
void Player_PCE::procACEA(channel_t *channel, int a) {
|
|
int x = a +
|
|
channel->controlVec2 +
|
|
channel->controlVec8 +
|
|
channel->controlVec9;
|
|
channel->controlVecShort02 = lookup_table[x];
|
|
}
|
|
|
|
Player_PCE::Player_PCE(ScummEngine *scumm, Audio::Mixer *mixer) {
|
|
for (int i = 0; i < 12; ++i) {
|
|
memset(&channels[i], 0, sizeof(channel_t));
|
|
channels[i].id = i;
|
|
}
|
|
|
|
_mixer = mixer;
|
|
_sampleRate = _mixer->getOutputRate();
|
|
_vm = scumm;
|
|
|
|
_samplesPerPeriod = 2 * (int)(_sampleRate / UPDATE_FREQ);
|
|
_sampleBuffer = new int16[_samplesPerPeriod];
|
|
_sampleBufferCnt = 0;
|
|
|
|
_psg = new PSG_HuC6280(PSG_CLOCK, _sampleRate);
|
|
|
|
_mixer->playStream(Audio::Mixer::kPlainSoundType, &_soundHandle, this, -1, Audio::Mixer::kMaxChannelVolume, 0, DisposeAfterUse::NO, true);
|
|
}
|
|
|
|
Player_PCE::~Player_PCE() {
|
|
_mixer->stopHandle(_soundHandle);
|
|
delete[] _sampleBuffer;
|
|
delete _psg;
|
|
}
|
|
|
|
void Player_PCE::stopSound(int nr) {
|
|
// TODO: implement
|
|
}
|
|
|
|
void Player_PCE::stopAllSounds() {
|
|
// TODO: implement
|
|
}
|
|
|
|
int Player_PCE::getSoundStatus(int nr) const {
|
|
// TODO: status for each sound
|
|
for (int i = 0; i < 6; ++i) {
|
|
if (channels[i].controlVec24)
|
|
return 1;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
int Player_PCE::getMusicTimer() {
|
|
return 0;
|
|
}
|
|
|
|
} // End of namespace Scumm
|
|
|
|
#endif // USE_RGB_COLOR
|