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Diffstat (limited to 'engines/sci/sfx/softseq/amiga.cpp')
| -rw-r--r-- | engines/sci/sfx/softseq/amiga.cpp | 676 |
1 files changed, 0 insertions, 676 deletions
diff --git a/engines/sci/sfx/softseq/amiga.cpp b/engines/sci/sfx/softseq/amiga.cpp deleted file mode 100644 index d16e82fab5..0000000000 --- a/engines/sci/sfx/softseq/amiga.cpp +++ /dev/null @@ -1,676 +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. - * - * $URL$ - * $Id$ - * - */ - -#include "sound/softsynth/emumidi.h" -#include "sci/sfx/softseq/mididriver.h" - -#include "common/file.h" -#include "common/frac.h" -#include "common/util.h" - -namespace Sci { - -/* #define DEBUG */ - -// Frequencies for every note -// FIXME Store only one octave -static const int freq_table[] = { - 58, 62, 65, 69, 73, 78, 82, 87, - 92, 98, 104, 110, 117, 124, 131, 139, - 147, 156, 165, 175, 185, 196, 208, 220, - 234, 248, 262, 278, 294, 312, 331, 350, - 371, 393, 417, 441, 468, 496, 525, 556, - 589, 625, 662, 701, 743, 787, 834, 883, - 936, 992, 1051, 1113, 1179, 1250, 1324, 1403, - 1486, 1574, 1668, 1767, 1872, 1984, 2102, 2227, - 2359, 2500, 2648, 2806, 2973, 3149, 3337, 3535, - 3745, 3968, 4204, 4454, 4719, 5000, 5297, 5612, - 5946, 6299, 6674, 7071, 7491, 7937, 8408, 8908, - 9438, 10000, 10594, 11224, 11892, 12599, 13348, 14142, - 14983, 15874, 16817, 17817, 18877, 20000, 21189, 22449, - 23784, 25198, 26696, 28284, 29966, 31748, 33635, 35635, - 37754, 40000, 42378, 44898, 47568, 50396, 53393, 56568, - 59932, 63496, 67271, 71271, 75509, 80000, 84757, 89796 -}; - -class MidiDriver_Amiga : public MidiDriver_Emulated { -public: - enum { - kVoices = 4 - }; - - MidiDriver_Amiga(Audio::Mixer *mixer) : MidiDriver_Emulated(mixer), _playSwitch(true), _masterVolume(15) { } - virtual ~MidiDriver_Amiga() { } - - // MidiDriver - int open(); - void close(); - void send(uint32 b); - MidiChannel *allocateChannel() { return NULL; } - MidiChannel *getPercussionChannel() { return NULL; } - - // AudioStream - bool isStereo() const { return true; } - int getRate() const { return _mixer->getOutputRate(); } - - // MidiDriver_Emulated - void generateSamples(int16 *buf, int len); - - void setVolume(byte volume); - void playSwitch(bool play); - virtual uint32 property(int prop, uint32 param); - -private: - enum { - kModeLoop = 1 << 0, // Instrument looping flag - kModePitch = 1 << 1 // Instrument pitch changes flag - }; - - enum { - kChannels = 10, - kBaseFreq = 20000, // Samplerate of the instrument bank - kPanLeft = 91, - kPanRight = 164 - }; - - struct Channel { - int instrument; - int volume; - int pan; - }; - - struct Envelope { - int length; // Phase period length in samples - int delta; // Velocity delta per period - int target; // Target velocity - }; - - struct Voice { - int instrument; - int note; - int note_velocity; - int velocity; - int envelope; - int envelope_samples; // Number of samples till next envelope event - int decay; - int looping; - int hw_channel; - frac_t offset; - frac_t rate; - }; - - struct Instrument { - char name[30]; - int mode; - int size; // Size of non-looping part in bytes - int loop_size; // Starting offset and size of loop in bytes - int transpose; // Transpose value in semitones - Envelope envelope[4]; // Envelope - int8 *samples; - int8 *loop; - }; - - struct Bank { - char name[30]; - uint size; - Instrument *instruments[256]; - }; - - bool _playSwitch; - int _masterVolume; - int _frequency; - Envelope _envDecay; - Bank _bank; // Instrument bank - - Channel _channels[MIDI_CHANNELS]; - /* Internal channels */ - Voice _voices[kChannels]; - - void setEnvelope(Voice *channel, Envelope *envelope, int phase); - int interpolate(int8 *samples, frac_t offset); - void playInstrument(int16 *dest, Voice *channel, int count); - void changeInstrument(int channel, int instrument); - void stopChannel(int ch); - void stopNote(int ch, int note); - void startNote(int ch, int note, int velocity); - Instrument *readInstrument(Common::File &file, int *id); -}; - -void MidiDriver_Amiga::setEnvelope(Voice *channel, Envelope *envelope, int phase) { - channel->envelope = phase; - channel->envelope_samples = envelope[phase].length; - - if (phase == 0) - channel->velocity = channel->note_velocity / 2; - else - channel->velocity = envelope[phase - 1].target; -} - -int MidiDriver_Amiga::interpolate(int8 *samples, frac_t offset) { - int x = fracToInt(offset); - int diff = (samples[x + 1] - samples[x]) << 8; - - return (samples[x] << 8) + fracToInt(diff * (offset & FRAC_LO_MASK)); -} - -void MidiDriver_Amiga::playInstrument(int16 *dest, Voice *channel, int count) { - int index = 0; - int vol = _channels[channel->hw_channel].volume; - Instrument *instrument = _bank.instruments[channel->instrument]; - - while (1) { - /* Available source samples until end of segment */ - frac_t lin_avail; - int seg_end, rem, i, amount; - int8 *samples; - - if (channel->looping) { - samples = instrument->loop; - seg_end = instrument->loop_size; - } else { - samples = instrument->samples; - seg_end = instrument->size; - } - - lin_avail = intToFrac(seg_end) - channel->offset; - - rem = count - index; - - /* Amount of destination samples that we will compute this iteration */ - amount = lin_avail / channel->rate; - - if (lin_avail % channel->rate) - amount++; - - if (amount > rem) - amount = rem; - - /* Stop at next envelope event */ - if ((channel->envelope_samples != -1) && (amount > channel->envelope_samples)) - amount = channel->envelope_samples; - - for (i = 0; i < amount; i++) { - dest[index++] = interpolate(samples, channel->offset) * channel->velocity / 64 * channel->note_velocity * vol / (127 * 127); - channel->offset += channel->rate; - } - - if (channel->envelope_samples != -1) - channel->envelope_samples -= amount; - - if (channel->envelope_samples == 0) { - Envelope *envelope; - int delta, target, velocity; - - if (channel->decay) - envelope = &_envDecay; - else - envelope = &instrument->envelope[channel->envelope]; - - delta = envelope->delta; - target = envelope->target; - velocity = channel->velocity - envelope->delta; - - /* Check whether we have reached the velocity target for the current phase */ - if ((delta >= 0 && velocity <= target) || (delta < 0 && velocity >= target)) { - channel->velocity = target; - - /* Stop note after velocity has dropped to 0 */ - if (target == 0) { - channel->note = -1; - break; - } else - switch (channel->envelope) { - case 0: - case 2: - /* Go to next phase */ - setEnvelope(channel, instrument->envelope, channel->envelope + 1); - break; - case 1: - case 3: - /* Stop envelope */ - channel->envelope_samples = -1; - break; - } - } else { - /* We haven't reached the target yet */ - channel->envelope_samples = envelope->length; - channel->velocity = velocity; - } - } - - if (index == count) - break; - - if (fracToInt(channel->offset) >= seg_end) { - if (instrument->mode & kModeLoop) { - /* Loop the samples */ - channel->offset -= intToFrac(seg_end); - channel->looping = 1; - } else { - /* All samples have been played */ - channel->note = -1; - break; - } - } - } -} - -void MidiDriver_Amiga::changeInstrument(int channel, int instrument) { -#ifdef DEBUG - if (_bank.instruments[instrument]) - printf("[sfx:seq:amiga] Setting channel %i to \"%s\" (%i)\n", channel, _bank.instruments[instrument]->name, instrument); - else - warning("[sfx:seq:amiga] instrument %i does not exist (channel %i)", instrument, channel); -#endif - _channels[channel].instrument = instrument; -} - -void MidiDriver_Amiga::stopChannel(int ch) { - int i; - - /* Start decay phase for note on this hw channel, if any */ - for (i = 0; i < kChannels; i++) - if (_voices[i].note != -1 && _voices[i].hw_channel == ch && !_voices[i].decay) { - /* Trigger fast decay envelope */ - _voices[i].decay = 1; - _voices[i].envelope_samples = _envDecay.length; - break; - } -} - -void MidiDriver_Amiga::stopNote(int ch, int note) { - int channel; - Instrument *instrument; - - for (channel = 0; channel < kChannels; channel++) - if (_voices[channel].note == note && _voices[channel].hw_channel == ch && !_voices[channel].decay) - break; - - if (channel == kChannels) { -#ifdef DEBUG - warning("[sfx:seq:amiga] cannot stop note %i on channel %i", note, ch); -#endif - return; - } - - instrument = _bank.instruments[_voices[channel].instrument]; - - /* Start the envelope phases for note-off if looping is on and envelope is enabled */ - if ((instrument->mode & kModeLoop) && (instrument->envelope[0].length != 0)) - setEnvelope(&_voices[channel], instrument->envelope, 2); -} - -void MidiDriver_Amiga::startNote(int ch, int note, int velocity) { - Instrument *instrument; - int channel; - - if (_channels[ch].instrument < 0 || _channels[ch].instrument > 255) { - warning("[sfx:seq:amiga] invalid instrument %i on channel %i", _channels[ch].instrument, ch); - return; - } - - instrument = _bank.instruments[_channels[ch].instrument]; - - if (!instrument) { - warning("[sfx:seq:amiga] instrument %i does not exist", _channels[ch].instrument); - return; - } - - for (channel = 0; channel < kChannels; channel++) - if (_voices[channel].note == -1) - break; - - if (channel == kChannels) { - warning("[sfx:seq:amiga] could not find a free channel"); - return; - } - - stopChannel(ch); - - if (instrument->mode & kModePitch) { - int fnote = note + instrument->transpose; - - if (fnote < 0 || fnote > 127) { - warning("[sfx:seq:amiga] illegal note %i\n", fnote); - return; - } - - /* Compute rate for note */ - _voices[channel].rate = doubleToFrac(freq_table[fnote] / (double) _frequency); - } else - _voices[channel].rate = doubleToFrac(kBaseFreq / (double) _frequency); - - _voices[channel].instrument = _channels[ch].instrument; - _voices[channel].note = note; - _voices[channel].note_velocity = velocity; - - if ((instrument->mode & kModeLoop) && (instrument->envelope[0].length != 0)) - setEnvelope(&_voices[channel], instrument->envelope, 0); - else { - _voices[channel].velocity = 64; - _voices[channel].envelope_samples = -1; - } - - _voices[channel].offset = 0; - _voices[channel].hw_channel = ch; - _voices[channel].decay = 0; - _voices[channel].looping = 0; -} - -MidiDriver_Amiga::Instrument *MidiDriver_Amiga::readInstrument(Common::File &file, int *id) { - Instrument *instrument; - byte header[61]; - int size; - int seg_size[3]; - int loop_offset; - int i; - - if (file.read(header, 61) < 61) { - warning("[sfx:seq:amiga] failed to read instrument header"); - return NULL; - } - - instrument = new Instrument; - - seg_size[0] = READ_BE_UINT16(header + 35) * 2; - seg_size[1] = READ_BE_UINT16(header + 41) * 2; - seg_size[2] = READ_BE_UINT16(header + 47) * 2; - - instrument->mode = header[33]; - instrument->transpose = (int8) header[34]; - for (i = 0; i < 4; i++) { - int length = (int8) header[49 + i]; - - if (length == 0 && i > 0) - length = 256; - - instrument->envelope[i].length = length * _frequency / 60; - instrument->envelope[i].delta = (int8)header[53 + i]; - instrument->envelope[i].target = header[57 + i]; - } - /* Final target must be 0 */ - instrument->envelope[3].target = 0; - - loop_offset = READ_BE_UINT32(header + 37) & ~1; - size = seg_size[0] + seg_size[1] + seg_size[2]; - - *id = READ_BE_UINT16(header); - - strncpy(instrument->name, (char *) header + 2, 29); - instrument->name[29] = 0; -#ifdef DEBUG - printf("[sfx:seq:amiga] Reading instrument %i: \"%s\" (%i bytes)\n", - *id, instrument->name, size); - printf(" Mode: %02x\n", instrument->mode); - printf(" Looping: %s\n", instrument->mode & kModeLoop ? "on" : "off"); - printf(" Pitch changes: %s\n", instrument->mode & kModePitch ? "on" : "off"); - printf(" Segment sizes: %i %i %i\n", seg_size[0], seg_size[1], seg_size[2]); - printf(" Segment offsets: 0 %i %i\n", loop_offset, read_int32(header + 43)); -#endif - instrument->samples = (int8 *) malloc(size + 1); - if (file.read(instrument->samples, size) < (unsigned int)size) { - warning("[sfx:seq:amiga] failed to read instrument samples"); - free(instrument->samples); - delete instrument; - return NULL; - } - - if (instrument->mode & kModeLoop) { - if (loop_offset + seg_size[1] > size) { -#ifdef DEBUG - warning("[sfx:seq:amiga] looping samples extend %i bytes past end of sample block", - loop_offset + seg_size[1] - size); -#endif - seg_size[1] = size - loop_offset; - } - - if (seg_size[1] < 0) { - warning("[sfx:seq:amiga] invalid looping point"); - free(instrument->samples); - delete instrument; - return NULL; - } - - instrument->size = seg_size[0]; - instrument->loop_size = seg_size[1]; - - instrument->loop = (int8*)malloc(instrument->loop_size + 1); - memcpy(instrument->loop, instrument->samples + loop_offset, instrument->loop_size); - - instrument->samples[instrument->size] = instrument->loop[0]; - instrument->loop[instrument->loop_size] = instrument->loop[0]; - } else { - instrument->loop = NULL; - instrument->size = size; - instrument->samples[instrument->size] = 0; - } - - return instrument; -} - -uint32 MidiDriver_Amiga::property(int prop, uint32 param) { - switch(prop) { - case MIDI_PROP_MASTER_VOLUME: - if (param != 0xffff) - _masterVolume = param; - return _masterVolume; - default: - break; - } - return 0; -} - -int MidiDriver_Amiga::open() { - _frequency = _mixer->getOutputRate(); - _envDecay.length = _frequency / (32 * 64); - _envDecay.delta = 1; - _envDecay.target = 0; - - Common::File file; - byte header[40]; - - if (!file.open("bank.001")) { - warning("[sfx:seq:amiga] file bank.001 not found"); - return Common::kUnknownError; - } - - if (file.read(header, 40) < 40) { - warning("[sfx:seq:amiga] failed to read header of file bank.001"); - return Common::kUnknownError; - } - - for (uint i = 0; i < 256; i++) - _bank.instruments[i] = NULL; - - for (uint i = 0; i < kChannels; i++) { - _voices[i].note = -1; - _voices[i].hw_channel = 0; - } - - for (uint i = 0; i < MIDI_CHANNELS; i++) { - _channels[i].instrument = -1; - _channels[i].volume = 127; - _channels[i].pan = (i % 4 == 0 || i % 4 == 3 ? kPanLeft : kPanRight); - } - - _bank.size = READ_BE_UINT16(header + 38); - strncpy(_bank.name, (char *) header + 8, 29); - _bank.name[29] = 0; -#ifdef DEBUG - printf("[sfx:seq:amiga] Reading %i instruments from bank \"%s\"\n", _bank.size, _bank.name); -#endif - - for (uint i = 0; i < _bank.size; i++) { - int id; - Instrument *instrument = readInstrument(file, &id); - - if (!instrument) { - warning("[sfx:seq:amiga] failed to read bank.001"); - return Common::kUnknownError; - } - - if (id < 0 || id > 255) { - warning("[sfx:seq:amiga] Error: instrument ID out of bounds"); - return Common::kUnknownError; - } - - _bank.instruments[id] = instrument; - } - - MidiDriver_Emulated::open(); - - _mixer->playInputStream(Audio::Mixer::kMusicSoundType, &_mixerSoundHandle, this, -1, _mixer->kMaxChannelVolume, 0, false); - - return Common::kNoError; -} - -void MidiDriver_Amiga::close() { - _mixer->stopHandle(_mixerSoundHandle); - - for (uint i = 0; i < _bank.size; i++) { - if (_bank.instruments[i]) { - if (_bank.instruments[i]->loop) - free(_bank.instruments[i]->loop); - free(_bank.instruments[i]->samples); - delete _bank.instruments[i]; - } - } -} - -void MidiDriver_Amiga::playSwitch(bool play) { - _playSwitch = play; -} - -void MidiDriver_Amiga::setVolume(byte volume_) { - _masterVolume = volume_; -} - -void MidiDriver_Amiga::send(uint32 b) { - byte command = b & 0xf0; - byte channel = b & 0xf; - byte op1 = (b >> 8) & 0xff; - byte op2 = (b >> 16) & 0xff; - - switch (command) { - case 0x80: - stopNote(channel, op1); - break; - case 0x90: - if (op2 > 0) - startNote(channel, op1, op2); - else - stopNote(channel, op1); - break; - case 0xb0: - switch (op1) { - case 0x07: - _channels[channel].volume = op2; - break; - case 0x0a: -#ifdef DEBUG - warning("[sfx:seq:amiga] ignoring pan 0x%02x event for channel %i", op2, channel); -#endif - break; - case 0x7b: - stopChannel(channel); - break; - default: - warning("[sfx:seq:amiga] unknown control event 0x%02x", op1); - } - break; - case 0xc0: - changeInstrument(channel, op1); - break; - default: - warning("[sfx:seq:amiga] unknown event %02x", command); - } -} - -void MidiDriver_Amiga::generateSamples(int16 *data, int len) { - if (len == 0) - return; - - int16 *buffers = (int16*)malloc(len * 2 * kChannels); - - memset(buffers, 0, len * 2 * kChannels); - - /* Generate samples for all notes */ - for (int i = 0; i < kChannels; i++) - if (_voices[i].note >= 0) - playInstrument(buffers + i * len, &_voices[i], len); - - if (isStereo()) { - for (int j = 0; j < len; j++) { - int mixedl = 0, mixedr = 0; - - /* Mix and pan */ - for (int i = 0; i < kChannels; i++) { - mixedl += buffers[i * len + j] * (256 - _channels[_voices[i].hw_channel].pan); - mixedr += buffers[i * len + j] * _channels[_voices[i].hw_channel].pan; - } - - /* Adjust volume */ - data[2 * j] = mixedl * _masterVolume >> 13; - data[2 * j + 1] = mixedr * _masterVolume >> 13; - } - } else { - for (int j = 0; j < len; j++) { - int mixed = 0; - - /* Mix */ - for (int i = 0; i < kChannels; i++) - mixed += buffers[i * len + j]; - - /* Adjust volume */ - data[j] = mixed * _masterVolume >> 6; - } - } - - free(buffers); -} - -class MidiPlayer_Amiga : public MidiPlayer { -public: - MidiPlayer_Amiga() { _driver = new MidiDriver_Amiga(g_system->getMixer()); } - int getPlayMask(SciVersion soundVersion); - int getPolyphony() const { return MidiDriver_Amiga::kVoices; } - bool hasRhythmChannel() const { return false; } - void setVolume(byte volume) { static_cast<MidiDriver_Amiga *>(_driver)->setVolume(volume); } - void playSwitch(bool play) { static_cast<MidiDriver_Amiga *>(_driver)->playSwitch(play); } - void loadInstrument(int idx, byte *data); -}; - -MidiPlayer *MidiPlayer_Amiga_create() { - return new MidiPlayer_Amiga(); -} - -int MidiPlayer_Amiga::getPlayMask(SciVersion soundVersion) { - if (soundVersion == SCI_VERSION_0_EARLY) - error("No amiga support for sci0early"); - - return 0x40; -} - -} // End of namespace Sci |