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Diffstat (limited to 'engines/scumm/player/apple2.cpp')
| -rw-r--r-- | engines/scumm/player/apple2.cpp | 500 |
1 files changed, 0 insertions, 500 deletions
diff --git a/engines/scumm/player/apple2.cpp b/engines/scumm/player/apple2.cpp deleted file mode 100644 index 671cbf9580..0000000000 --- a/engines/scumm/player/apple2.cpp +++ /dev/null @@ -1,500 +0,0 @@ -/* ScummVM - Graphic Adventure Engine - * - * ScummVM is the legal property of its developers, whose names - * are too numerous to list here. Please refer to the COPYRIGHT - * file distributed with this source distribution. - * - * 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; either version 2 - * of the License, or (at your option) any later version. - - * 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 for more details. - - * You should have received a copy of the GNU General Public License - * along with this program; if not, write to the Free Software - * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. - * - */ - -#include "engines/engine.h" -#include "scumm/player/apple2.h" -#include "scumm/scumm.h" - -namespace Scumm { - -/************************************ - * Apple-II sound-resource parsers - ************************************/ - -/* - * SoundFunction1: frequency up/down - */ -class AppleII_SoundFunction1_FreqUpDown : public AppleII_SoundFunction { -public: - virtual void init(Player_AppleII *player, const byte *params) { - _player = player; - _delta = params[0]; - _count = params[1]; - _interval = params[2]; - _limit = params[3]; - _decInterval = (params[4] >= 0x40); - } - - virtual bool update() { // D085 - if (_decInterval) { - do { - _update(_interval, _count); - _interval -= _delta; - } while (_interval >= _limit); - } else { - do { - _update(_interval, _count); - _interval += _delta; - } while (_interval < _limit); - } - return true; - } - -private: - void _update(int interval /*a*/, int count /*y*/) { // D076 - assert(interval > 0); // 0 == 256? - assert(count > 0); // 0 == 256? - - for (; count >= 0; --count) { - _player->speakerToggle(); - _player->generateSamples(17 + 5 * interval); - } - } - -protected: - int _delta; - int _count; - byte _interval; // must be unsigned byte ("interval < delta" possible) - int _limit; - bool _decInterval; -}; - -/* - * SoundFunction2: symmetric wave (~) - */ -class AppleII_SoundFunction2_SymmetricWave : public AppleII_SoundFunction { -public: - virtual void init(Player_AppleII *player, const byte *params) { - _player = player; - _params = params; - _pos = 1; - } - - virtual bool update() { // D0D6 - // while (pos = 1; pos < 256; ++pos) - if (_pos < 256) { - byte interval = _params[_pos]; - if (interval == 0xFF) - return true; - _update(interval, _params[0] /*, LD12F=interval*/); - - ++_pos; - return false; - } - return true; - } - -private: - void _update(int interval /*a*/, int count) { // D0EF - if (interval == 0xFE) { - _player->wait(interval, 10); - } else { - assert(count > 0); // 0 == 256? - assert(interval > 0); // 0 == 256? - - int a = (interval >> 3) + count; - for (int y = a; y > 0; --y) { - _player->generateSamples(1292 - 5*interval); - _player->speakerToggle(); - - _player->generateSamples(1287 - 5*interval); - _player->speakerToggle(); - } - } - } - -protected: - const byte *_params; - int _pos; -}; - -/* - * SoundFunction3: asymmetric wave (__-) - */ -class AppleII_SoundFunction3_AsymmetricWave : public AppleII_SoundFunction { -public: - virtual void init(Player_AppleII *player, const byte *params) { - _player = player; - _params = params; - _pos = 1; - } - - virtual bool update() { // D132 - // while (pos = 1; pos < 256; ++pos) - if (_pos < 256) { - byte interval = _params[_pos]; - if (interval == 0xFF) - return true; - _update(interval, _params[0]); - - ++_pos; - return false; - } - return true; - } - -private: - void _update(int interval /*a*/, int count /*LD12D*/) { // D14B - if (interval == 0xFE) { - _player->wait(interval, 70); - } else { - assert(interval > 0); // 0 == 256? - assert(count > 0); // 0 == 256? - - for (int y = count; y > 0; --y) { - _player->generateSamples(1289 - 5*interval); - _player->speakerToggle(); - } - } - } - -protected: - const byte *_params; - int _pos; -}; - -/* - * SoundFunction4: polyphone (2 voices) - */ -class AppleII_SoundFunction4_Polyphone : public AppleII_SoundFunction { -public: - virtual void init(Player_AppleII *player, const byte *params) { - _player = player; - _params = params; - _updateRemain1 = 80; - _updateRemain2 = 10; - _count = 0; - } - - virtual bool update() { // D170 - // while (_params[0] != 0x01) - if (_params[0] != 0x01) { - if (_count == 0) // prepare next loop - nextLoop(_params[0], _params[1], _params[2]); - if (loopIteration()) // loop finished -> fetch next parameter set - _params += 3; - return false; - } - return true; - } - -private: - /* - * prepare for next parameter set loop - */ - void nextLoop(byte param0, byte param1, byte param2) { // LD182 - _count = (-param2 << 8) | 0x3; - - _bitmask1 = 0x3; - _bitmask2 = 0x3; - - _updateInterval2 = param0; - if (_updateInterval2 == 0) - _bitmask2 = 0x0; - - _updateInterval1 = param1; - if (_updateInterval1 == 0) { - _bitmask1 = 0x0; - if (_bitmask2 != 0) { - _bitmask1 = _bitmask2; - _bitmask2 = 0; - _updateInterval1 = _updateInterval2; - } - } - - _speakerShiftReg = 0; - } - - /* - * perform one loop iteration - * Returns true if loop finished - */ - bool loopIteration() { // D1A2 - --_updateRemain1; - --_updateRemain2; - - if (_updateRemain2 == 0) { - _updateRemain2 = _updateInterval2; - // use only first voice's data (bitmask1) if both voices are triggered - if (_updateRemain1 != 0) { - _speakerShiftReg ^= _bitmask2; - } - } - - if (_updateRemain1 == 0) { - _updateRemain1 = _updateInterval1; - _speakerShiftReg ^= _bitmask1; - } - - if (_speakerShiftReg & 0x1) - _player->speakerToggle(); - _speakerShiftReg >>= 1; - _player->generateSamples(42); /* actually 42.5 */ - - ++_count; - return (_count == 0); - } - -protected: - const byte *_params; - - byte _updateRemain1; - byte _updateRemain2; - - uint16 _count; - byte _bitmask1; - byte _bitmask2; - byte _updateInterval1; - byte _updateInterval2; - byte _speakerShiftReg; -}; - -/* - * SoundFunction5: periodic noise - */ -class AppleII_SoundFunction5_Noise : public AppleII_SoundFunction { -public: - virtual void init(Player_AppleII *player, const byte *params) { - _player = player; - _index = 0; - _param0 = params[0]; - assert(_param0 > 0); - } - - virtual bool update() { // D222 - const byte noiseMask[] = { - 0x3F, 0x3F, 0x7F, 0x7F, 0x7F, 0x7F, 0xFF, 0xFF, 0xFF, 0x0F, 0x0F - }; - - // while (i = 0; i < 10; ++i) - if (_index < 10) { - int count = _param0; - do { - _update(noise() & noiseMask[_index], 1); - --count; - } while (count > 0); - - ++_index; - return false; - } - - return true; - } - -private: - void _update(int interval /*a*/, int count) { // D270 - assert(count > 0); // 0 == 256? - if (interval == 0) - interval = 256; - - for (int i = count; i > 0; --i) { - _player->generateSamples(10 + 5*interval); - _player->speakerToggle(); - - _player->generateSamples(5 + 5*interval); - _player->speakerToggle(); - } - } - - byte /*a*/ noise() { // D261 - static int pos = 0; // initial value? - byte result = _noiseTable[pos]; - pos = (pos + 1) % 256; - return result; - } - -protected: - int _index; - int _param0; - -private: - static const byte _noiseTable[256]; -}; - -// LD000[loc] ^ LD00A[loc] -const byte AppleII_SoundFunction5_Noise::_noiseTable[256] = { - 0x65, 0x1b, 0xda, 0x11, 0x61, 0xe5, 0x77, 0x57, 0x92, 0xc8, 0x51, 0x1c, 0xd4, 0x91, 0x62, 0x63, - 0x00, 0x38, 0x57, 0xd5, 0x18, 0xd8, 0xdc, 0x40, 0x03, 0x86, 0xd3, 0x2f, 0x10, 0x11, 0xd8, 0x3c, - 0xbe, 0x00, 0x19, 0xc5, 0xd2, 0xc3, 0xca, 0x34, 0x00, 0x28, 0xbf, 0xb9, 0x18, 0x20, 0x01, 0xcc, - 0xda, 0x08, 0xbc, 0x75, 0x7c, 0xb0, 0x8d, 0xe0, 0x09, 0x18, 0xbf, 0x5d, 0xe9, 0x8c, 0x75, 0x64, - 0xe5, 0xb5, 0x5d, 0xe0, 0xb7, 0x7d, 0xe9, 0x8c, 0x55, 0x65, 0xc5, 0xb5, 0x5d, 0xd8, 0x09, 0x0d, - 0x64, 0xf0, 0xf0, 0x08, 0x63, 0x03, 0x00, 0x55, 0x35, 0xc0, 0x00, 0x20, 0x74, 0xa5, 0x1e, 0xe3, - 0x00, 0x06, 0x3c, 0x52, 0xd1, 0x70, 0xd0, 0x57, 0x02, 0xf0, 0x00, 0xb6, 0xfc, 0x02, 0x11, 0x9a, - 0x3b, 0xc8, 0x38, 0xdf, 0x1a, 0xb0, 0xd1, 0xb8, 0xd0, 0x18, 0x8a, 0x4a, 0xea, 0x1b, 0x12, 0x5d, - 0x29, 0x58, 0xd8, 0x43, 0xb8, 0x2d, 0xd2, 0x61, 0x10, 0x3c, 0x0c, 0x5d, 0x1b, 0x61, 0x10, 0x3c, - 0x0a, 0x5d, 0x1d, 0x61, 0x10, 0x3c, 0x0b, 0x19, 0x88, 0x21, 0xc0, 0x21, 0x07, 0x00, 0x65, 0x62, - 0x08, 0xe9, 0x36, 0x40, 0x20, 0x41, 0x06, 0x00, 0x20, 0x00, 0x00, 0xed, 0xa3, 0x00, 0x88, 0x06, - 0x98, 0x01, 0x5d, 0x7f, 0x02, 0x1d, 0x78, 0x03, 0x60, 0xcb, 0x3a, 0x01, 0xbd, 0x78, 0x02, 0x5d, - 0x7e, 0x03, 0x1d, 0xf5, 0xa6, 0x40, 0x81, 0xb4, 0xd0, 0x8d, 0xd3, 0xd0, 0x6d, 0xd5, 0x61, 0x48, - 0x61, 0x4d, 0xd1, 0xc8, 0xb1, 0xd8, 0x69, 0xff, 0x61, 0xd9, 0xed, 0xa0, 0xfe, 0x19, 0x91, 0x37, - 0x19, 0x37, 0x00, 0xf1, 0x00, 0x01, 0x1f, 0x00, 0xad, 0xc1, 0x01, 0x01, 0x2e, 0x00, 0x40, 0xc6, - 0x7a, 0x9b, 0x95, 0x43, 0xfc, 0x18, 0xd2, 0x9e, 0x2a, 0x5a, 0x4b, 0x2a, 0xb6, 0x87, 0x30, 0x6c -}; - -/************************************ - * Apple-II player - ************************************/ - -Player_AppleII::Player_AppleII(ScummEngine *scumm, Audio::Mixer *mixer) - : _mixer(mixer), _vm(scumm), _soundFunc(0) { - resetState(); - setSampleRate(_mixer->getOutputRate()); - _mixer->playStream(Audio::Mixer::kPlainSoundType, &_soundHandle, this, -1, Audio::Mixer::kMaxChannelVolume, 0, DisposeAfterUse::NO, true); -} - -Player_AppleII::~Player_AppleII() { - _mixer->stopHandle(_soundHandle); - delete _soundFunc; -} - -void Player_AppleII::resetState() { - _soundNr = 0; - _type = 0; - _loop = 0; - _params = NULL; - _speakerState = 0; - delete _soundFunc; - _soundFunc = 0; - _sampleConverter.reset(); -} - -void Player_AppleII::startSound(int nr) { - Common::StackLock lock(_mutex); - - byte *data = _vm->getResourceAddress(rtSound, nr); - assert(data); - byte *ptr1 = data + 4; - - resetState(); - _soundNr = nr; - _type = ptr1[0]; - _loop = ptr1[1]; - _params = &ptr1[2]; - - switch (_type) { - case 0: // empty (nothing to play) - resetState(); - return; - case 1: - _soundFunc = new AppleII_SoundFunction1_FreqUpDown(); - break; - case 2: - _soundFunc = new AppleII_SoundFunction2_SymmetricWave(); - break; - case 3: - _soundFunc = new AppleII_SoundFunction3_AsymmetricWave(); - break; - case 4: - _soundFunc = new AppleII_SoundFunction4_Polyphone(); - break; - case 5: - _soundFunc = new AppleII_SoundFunction5_Noise(); - break; - } - _soundFunc->init(this, _params); - - assert(_loop > 0); - - debug(4, "startSound %d: type %d, loop %d", - nr, _type, _loop); -} - -bool Player_AppleII::updateSound() { - if (!_soundFunc) - return false; - - if (_soundFunc->update()) { - --_loop; - if (_loop <= 0) { - delete _soundFunc; - _soundFunc = 0; - } else { - // reset function state on each loop - _soundFunc->init(this, _params); - } - } - - return true; -} - -void Player_AppleII::stopAllSounds() { - Common::StackLock lock(_mutex); - resetState(); -} - -void Player_AppleII::stopSound(int nr) { - Common::StackLock lock(_mutex); - if (_soundNr == nr) { - resetState(); - } -} - -int Player_AppleII::getSoundStatus(int nr) const { - Common::StackLock lock(_mutex); - return (_soundNr == nr); -} - -int Player_AppleII::getMusicTimer() { - /* Apple-II sounds are synchronous -> no music timer */ - return 0; -} - -int Player_AppleII::readBuffer(int16 *buffer, const int numSamples) { - Common::StackLock lock(_mutex); - - if (!_soundNr) - return 0; - - int samplesLeft = numSamples; - do { - int nSamplesRead = _sampleConverter.readSamples(buffer, samplesLeft); - samplesLeft -= nSamplesRead; - buffer += nSamplesRead; - } while ((samplesLeft > 0) && updateSound()); - - // reset state if sound is played completely - if (!_soundFunc && (_sampleConverter.availableSize() == 0)) - resetState(); - - return numSamples - samplesLeft; -} - -/************************************ - * Apple-II sound-resource helpers - ************************************/ - -// toggle speaker on/off -void Player_AppleII::speakerToggle() { - _speakerState ^= 0x1; -} - -void Player_AppleII::generateSamples(int cycles) { - _sampleConverter.addCycles(_speakerState, cycles); -} - -void Player_AppleII::wait(int interval, int count /*y*/) { - assert(count > 0); // 0 == 256? - assert(interval > 0); // 0 == 256? - generateSamples(11 + count*(8 + 5 * interval)); -} - -} // End of namespace Scumm |