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author | Tobias Gunkel | 2011-12-20 12:07:50 +0100 |
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committer | Tobias Gunkel | 2011-12-22 12:08:27 +0100 |
commit | 7d551c9e6e8c5a46086f9da5e601561c434bafe0 (patch) | |
tree | 83d6ce0358770f10e0f514c101b88cf595cf32d6 /engines/scumm | |
parent | ffc88c5ceda344d5d5166ecbd712c6714e7af738 (diff) | |
download | scummvm-rg350-7d551c9e6e8c5a46086f9da5e601561c434bafe0.tar.gz scummvm-rg350-7d551c9e6e8c5a46086f9da5e601561c434bafe0.tar.bz2 scummvm-rg350-7d551c9e6e8c5a46086f9da5e601561c434bafe0.zip |
SCUMM: Wrap player_appleII sound generation functions in classes
Diffstat (limited to 'engines/scumm')
-rw-r--r-- | engines/scumm/player_appleII.cpp | 623 | ||||
-rw-r--r-- | engines/scumm/player_appleII.h | 52 |
2 files changed, 364 insertions, 311 deletions
diff --git a/engines/scumm/player_appleII.cpp b/engines/scumm/player_appleII.cpp index a4111c5109..a027b522b5 100644 --- a/engines/scumm/player_appleII.cpp +++ b/engines/scumm/player_appleII.cpp @@ -27,10 +27,322 @@ 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; + } + + virtual bool update() { // D170 + // while (_state.params[0] != 0x01) + if (_params[0] != 0x01) { + _update(_params[0], _params[1], _params[2]); + _params += 3; + return false; + } + return true; + } + +private: + void _update(byte param0, byte param1, byte param2) { // D1A2 + uint16 count = (-param2 << 8) | 0x3; + byte bitmask1 = 0x3; + byte bitmask2 = 0x3; + + byte updateInterval2 = param0; + if (updateInterval2 == 0) + bitmask2 = 0x0; + + byte updateInterval1 = param1; + if (updateInterval1 == 0) { + bitmask1 = 0x0; + if (bitmask2 != 0) { + bitmask1 = bitmask2; + bitmask2 = 0; + updateInterval1 = updateInterval2; + } + } + + byte speakerShiftReg = 0; + + while (true) { + --_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; + if (count == 0) { + return; + } + } + } + +protected: + const byte *_params; + byte _updateRemain1; + byte _updateRemain2; +}; + +/* + * 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; + _state.soundFunc = 0; resetState(); setSampleRate(_mixer->getOutputRate()); @@ -40,6 +352,7 @@ Player_AppleII::Player_AppleII(ScummEngine *scumm, Audio::Mixer *mixer) { Player_AppleII::~Player_AppleII() { _mixer->stopHandle(_soundHandle); + delete _state.soundFunc; } /* @@ -69,77 +382,56 @@ void logSounds() { void Player_AppleII::startSound(int nr) { Common::StackLock lock(_mutex); - resetState(); - byte *data = _vm->getResourceAddress(rtSound, nr); assert(data); byte *ptr1 = data + 4; + resetState(); + _state.soundNr = nr; _state.type = ptr1[0]; - if (_state.type == 0) { - // nothing to play + _state.loop = ptr1[1]; + _state.params = &ptr1[2]; + + switch (_state.type) { + case 0: // empty (nothing to play) resetState(); return; + case 1: + _state.soundFunc = new AppleII_SoundFunction1_FreqUpDown(); + break; + case 2: + _state.soundFunc = new AppleII_SoundFunction2_SymmetricWave(); + break; + case 3: + _state.soundFunc = new AppleII_SoundFunction3_AsymmetricWave(); + break; + case 4: + _state.soundFunc = new AppleII_SoundFunction4_Polyphone(); + break; + case 5: + _state.soundFunc = new AppleII_SoundFunction5_Noise(); + break; } + _state.soundFunc->init(this, _state.params); - _state.soundNr = nr; - _state.finished = false; - initFuncState(); - - _state.loop = ptr1[1]; assert(_state.loop > 0); - _state.params = &ptr1[2]; - debug(4, "startSound %d: type %d, loop %d", nr, _state.type, _state.loop); } -void Player_AppleII::initFuncState() { - switch (_state.type) { - case 2: case 3: - _state.func23.pos = 1; - break; - case 4: - _state.func4.updateRemain1 = 80; - _state.func4.updateRemain2 = 10; - break; - case 5: - _state.func5.index = 0; - break; - } -} - bool Player_AppleII::updateSound() { - if (!_state.soundNr || _state.finished) + if (!_state.soundFunc) return false; - bool done = false; - switch (_state.type) { - case 1: // freq up/down - done = soundFunc1(); - break; - case 2: // symmetric wave (~) - done = soundFunc2(); - break; - case 3: // asymmetric wave (__-) - done = soundFunc3(); - break; - case 4: // polyphone (2 voices) - done = soundFunc4(); - break; - case 5: // periodic noise - done = soundFunc5(); - break; - } - - if (done) { + if (_state.soundFunc->update()) { --_state.loop; if (_state.loop <= 0) { - _state.finished = true; + delete _state.soundFunc; + _state.soundFunc = 0; } else { // reset function state on each loop - initFuncState(); + _state.soundFunc->init(this, _state.params); } } @@ -151,9 +443,9 @@ void Player_AppleII::resetState() { _state.type = 0; _state.loop = 0; _state.params = NULL; - _state.localParams = NULL; _state.speakerState = 0; - _state.finished = true; + delete _state.soundFunc; + _state.soundFunc = 0; _sampleConverter.reset(); } @@ -194,14 +486,14 @@ int Player_AppleII::readBuffer(int16 *buffer, const int numSamples) { } while ((samplesLeft > 0) && updateSound()); // reset state if sound is played completely - if (_state.finished && (_sampleConverter.availableSize() == 0)) + if (!_state.soundFunc && (_sampleConverter.availableSize() == 0)) resetState(); return numSamples - samplesLeft; } /************************************ - * Apple-II sound-resource parser + * Apple-II sound-resource helpers ************************************/ // toggle speaker on/off @@ -219,229 +511,4 @@ void Player_AppleII::wait(int interval, int count /*y*/) { generateSamples(11 + count*(8 + 5 * interval)); } -void Player_AppleII::_soundFunc1(int interval /*a*/, int count /*y*/) { // D076 - assert(interval > 0); // 0 == 256? - assert(count > 0); // 0 == 256? - - for (; count >= 0; --count) { - speakerToggle(); - generateSamples(17 + 5 * interval); - } -} - -bool Player_AppleII::soundFunc1() { // D085 - const int delta = _state.params[0]; - const int count = _state.params[1]; - byte interval = _state.params[2]; // must be byte ("interval < delta" possible) - const int limit = _state.params[3]; - const bool decInterval = (_state.params[4] >= 0x40); - - if (decInterval) { - do { - _soundFunc1(interval, count); - interval -= delta; - } while (interval >= limit); - } else { - do { - _soundFunc1(interval, count); - interval += delta; - } while (interval < limit); - } - - return true; -} - -void Player_AppleII::_soundFunc2(int interval /*a*/, int count) { // D0EF - if (interval == 0xFE) { - 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) { - generateSamples(1292 - 5*interval); - speakerToggle(); - - generateSamples(1287 - 5*interval); - speakerToggle(); - } - } -} - -bool Player_AppleII::soundFunc2() { // D0D6 - // while (pos = 1; pos < 256; ++pos) - if (_state.func23.pos < 256) { - byte interval = _state.params[_state.func23.pos]; - if (interval == 0xFF) - return true; - _soundFunc2(interval, _state.params[0] /*, LD12F=interval*/); - - ++_state.func23.pos; - return false; - } - return true; -} - -void Player_AppleII::_soundFunc3(int interval /*a*/, int count /*LD12D*/) { // D14B - if (interval == 0xFE) { - wait(interval, 70); - } else { - assert(interval > 0); // 0 == 256? - assert(count > 0); // 0 == 256? - - for (int y = count; y > 0; --y) { - generateSamples(1289 - 5*interval); - speakerToggle(); - } - } -} - -bool Player_AppleII::soundFunc3() { // D132 - // while (pos = 1; pos < 256; ++pos) - if (_state.func23.pos < 256) { - byte interval = _state.params[_state.func23.pos]; - if (interval == 0xFF) - return true; - _soundFunc3(interval, _state.params[0]); - - ++_state.func23.pos; - return false; - } - return true; -} - -void Player_AppleII::_soundFunc4(byte param0, byte param1, byte param2) { // D1A2 - uint16 count = (-param2 << 8) | 0x3; - byte bitmask1 = 0x3; - byte bitmask2 = 0x3; - - byte updateInterval2 = param0; - if (updateInterval2 == 0) - bitmask2 = 0x0; - - byte updateInterval1 = param1; - if (updateInterval1 == 0) { - bitmask1 = 0x0; - if (bitmask2 != 0) { - bitmask1 = bitmask2; - bitmask2 = 0; - updateInterval1 = updateInterval2; - } - } - - byte speakerShiftReg = 0; - byte updateRemain1 = _state.func4.updateRemain1; - byte updateRemain2 = _state.func4.updateRemain2; - - while (true) { - --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) - speakerToggle(); - speakerShiftReg >>= 1; - generateSamples(42); /* actually 42.5 */ - - ++count; - if (count == 0) { - _state.func4.updateRemain1 = updateRemain1; - _state.func4.updateRemain2 = updateRemain2; - return; - } - } -} - -bool Player_AppleII::soundFunc4() { // D170 - if (!_state.localParams) - _state.localParams = _state.params; - - // while (_state.params[0] != 0x01) - if (_state.localParams[0] != 0x01) { - _soundFunc4(_state.localParams[0], _state.localParams[1], _state.localParams[2]); - _state.localParams += 3; - return false; - } - - _state.localParams = NULL; - return true; -} - -void Player_AppleII::_soundFunc5(int interval /*a*/, int count) { // D270 - assert(count > 0); // 0 == 256? - if (interval == 0) - interval = 256; - - for (int i = count; i > 0; --i) { - generateSamples(10 + 5*interval); - speakerToggle(); - - generateSamples(5 + 5*interval); - speakerToggle(); - } -} - -// LD000[loc] ^ LD00A[loc] -static const byte 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 -}; - -byte /*a*/ Player_AppleII::noise() { // D261 - static int pos = 0; // initial value? - byte result = noiseTable[pos]; - pos = (pos + 1) % 256; - return result; -} - -bool Player_AppleII::soundFunc5() { // D222 - const byte noiseMask[] = { - 0x3F, 0x3F, 0x7F, 0x7F, 0x7F, 0x7F, 0xFF, 0xFF, 0xFF, 0x0F, 0x0F - }; - - int param0 = _state.params[0]; - assert(param0 > 0); - - // while (i = 0; i < 10; ++i) - if (_state.func5.index < 10) { - int count = param0; - do { - _soundFunc5(noise() & noiseMask[_state.func5.index], 1); - --count; - } while (count > 0); - - ++_state.func5.index; - return false; - } - - return true; -} - } // End of namespace Scumm diff --git a/engines/scumm/player_appleII.h b/engines/scumm/player_appleII.h index eb4a99c4bd..91c7935f76 100644 --- a/engines/scumm/player_appleII.h +++ b/engines/scumm/player_appleII.h @@ -217,6 +217,8 @@ private: DynamicMemoryStream _buffer; }; +class AppleII_SoundFunction; + class Player_AppleII : public Audio::AudioStream, public MusicEngine { public: Player_AppleII(ScummEngine *scumm, Audio::Mixer *mixer); @@ -240,6 +242,11 @@ public: bool endOfData() const { return false; } int getRate() const { return _sampleRate; } +public: + void speakerToggle(); + void generateSamples(int cycles); + void wait(int interval, int count); + private: struct sound_state { // sound number @@ -250,25 +257,10 @@ private: int loop; // global sound param list const byte *params; - // local sound param list - const byte *localParams; // speaker toggle state (0 / 1) byte speakerState; - // processing complete - bool finished; - // sound type specific data - union { - struct { - byte updateRemain1; - byte updateRemain2; - } func4; - struct { - int pos; - } func23; - struct { - int index; - } func5; - }; + // sound function + AppleII_SoundFunction *soundFunc; } _state; ScummEngine *_vm; @@ -282,23 +274,17 @@ private: private: void resetState(); - void initFuncState(); bool updateSound(); - void speakerToggle(); - void generateSamples(int cycles); - void wait(int interval, int count); - byte noise(); - - bool soundFunc1(); - void _soundFunc1(int interval, int count); - bool soundFunc2(); - void _soundFunc2(int interval, int count); - bool soundFunc3(); - void _soundFunc3(int interval, int count); - bool soundFunc4(); - void _soundFunc4(byte param0, byte param1, byte param2); - bool soundFunc5(); - void _soundFunc5(int interval, int count); +}; + +class AppleII_SoundFunction { +public: + AppleII_SoundFunction() {} + virtual ~AppleII_SoundFunction() {} + virtual void init(Player_AppleII *player, const byte *params) = 0; + virtual bool update() = 0; +protected: + Player_AppleII *_player; }; } // End of namespace Scumm |