mirror of
https://github.com/ZDoom/qzdoom.git
synced 2024-11-10 23:02:08 +00:00
498 lines
13 KiB
C++
498 lines
13 KiB
C++
//-----------------------------------------------------------------------------
|
|
//
|
|
// Copyright 2002-2016 Randy Heit
|
|
// Copyright 2005-2014 Simon Howard
|
|
// Copyright 2017 Christoph Oelckers
|
|
//
|
|
// 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 3 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, see http://www.gnu.org/licenses/
|
|
//
|
|
//-----------------------------------------------------------------------------
|
|
//
|
|
// This is mostly a reimplementation of the interface provided by
|
|
// MusLib based on Chocolate-Doom's OPL player, although the
|
|
// interface has been cleaned up a bit to be more consistent and readable.
|
|
//
|
|
//
|
|
|
|
#include <stdlib.h>
|
|
#include <string.h>
|
|
#include "musicblock.h"
|
|
|
|
musicBlock::musicBlock ()
|
|
{
|
|
memset (this, 0, sizeof(*this));
|
|
for(auto &oplchannel : oplchannels) oplchannel.Panning = 64; // default to center panning.
|
|
for(auto &voice : voices) voice.index = ~0u; // mark all free.
|
|
}
|
|
|
|
musicBlock::~musicBlock ()
|
|
{
|
|
}
|
|
|
|
//----------------------------------------------------------------------------
|
|
//
|
|
//
|
|
//
|
|
//----------------------------------------------------------------------------
|
|
|
|
int musicBlock::releaseVoice(uint32_t slot, uint32_t killed)
|
|
{
|
|
struct OPLVoice *ch = &voices[slot];
|
|
io->WriteFrequency(slot, ch->note, ch->pitch, 0);
|
|
ch->index = ~0u;
|
|
ch->sustained = false;
|
|
if (!killed) ch->timestamp = ++timeCounter;
|
|
if (killed) io->MuteChannel(slot);
|
|
return slot;
|
|
}
|
|
|
|
//----------------------------------------------------------------------------
|
|
//
|
|
//
|
|
//
|
|
//----------------------------------------------------------------------------
|
|
|
|
int musicBlock::findFreeVoice()
|
|
{
|
|
// We want to prefer the least recently freed voice, as more recently
|
|
// freed voices can still play a tone from their release state.
|
|
// Sustained voices are replaced when there are no free voices.
|
|
uint32_t min_value = ~0u;
|
|
int result = -1;
|
|
for (uint32_t i = 0; i < io->NumChannels; ++i)
|
|
{
|
|
uint32_t voice_value = voices[i].timestamp + (voices[i].sustained ? (1 << 31) : 0);
|
|
if ((voices[i].index == ~0u || voices[i].sustained) && (voice_value < min_value))
|
|
{
|
|
min_value = voice_value;
|
|
result = i;
|
|
}
|
|
}
|
|
if (result >= 0)
|
|
{
|
|
releaseVoice(result, 1);
|
|
}
|
|
return result;
|
|
}
|
|
|
|
//----------------------------------------------------------------------------
|
|
//
|
|
// When all voices are in use, we must discard an existing voice to
|
|
// play a new note. Find and free an existing voice. The channel
|
|
// passed to the function is the channel for the new note to be
|
|
// played.
|
|
//
|
|
//----------------------------------------------------------------------------
|
|
|
|
int musicBlock::replaceExistingVoice()
|
|
{
|
|
// Check the allocated voices, if we find an instrument that is
|
|
// of a lower priority to the new instrument, discard it.
|
|
// If a voice is being used to play the second voice of an instrument,
|
|
// use that, as second voices are non-essential.
|
|
// Lower numbered MIDI channels implicitly have a higher priority
|
|
// than higher-numbered channels, eg. MIDI channel 1 is never
|
|
// discarded for MIDI channel 2.
|
|
int result = 0;
|
|
|
|
for (uint32_t i = 0; i < io->NumChannels; ++i)
|
|
{
|
|
if (voices[i].current_instr_voice == &voices[i].current_instr->voices[1] ||
|
|
voices[i].index >= voices[result].index)
|
|
{
|
|
result = i;
|
|
}
|
|
}
|
|
|
|
releaseVoice(result, 1);
|
|
return result;
|
|
}
|
|
|
|
//----------------------------------------------------------------------------
|
|
//
|
|
//
|
|
//
|
|
//----------------------------------------------------------------------------
|
|
|
|
void musicBlock::voiceKeyOn(uint32_t slot, uint32_t channo, GenMidiInstrument *instrument, uint32_t instrument_voice, uint32_t key, uint32_t volume)
|
|
{
|
|
struct OPLVoice *voice = &voices[slot];
|
|
auto &channel = oplchannels[channo];
|
|
GenMidiVoice *gmvoice;
|
|
|
|
voice->index = channo;
|
|
voice->key = key;
|
|
|
|
// Program the voice with the instrument data:
|
|
voice->current_instr = instrument;
|
|
gmvoice = voice->current_instr_voice = &instrument->voices[instrument_voice];
|
|
io->WriteInstrument(slot,gmvoice, channel.Vibrato);
|
|
io->WritePan(slot, gmvoice, channel.Panning);
|
|
|
|
// Set the volume level.
|
|
voice->note_volume = volume;
|
|
io->WriteVolume(slot, gmvoice, channel.Volume, channel.Expression, volume);
|
|
|
|
// Write the frequency value to turn the note on.
|
|
|
|
// Work out the note to use. This is normally the same as
|
|
// the key, unless it is a fixed pitch instrument.
|
|
int note;
|
|
if (instrument->flags & GENMIDI_FLAG_FIXED) note = instrument->fixed_note;
|
|
else if (channo == CHAN_PERCUSSION) note = 60;
|
|
else note = key;
|
|
|
|
// If this is the second voice of a double voice instrument, the
|
|
// frequency index can be adjusted by the fine tuning field.
|
|
voice->fine_tuning = (instrument_voice != 0) ? (voice->current_instr->fine_tuning / 2) - 64 : 0;
|
|
voice->pitch = voice->fine_tuning + channel.Pitch;
|
|
|
|
if (!(instrument->flags & GENMIDI_FLAG_FIXED) && channo != CHAN_PERCUSSION)
|
|
{
|
|
note += gmvoice->base_note_offset;
|
|
}
|
|
|
|
// Avoid possible overflow due to base note offset:
|
|
|
|
while (note < 0)
|
|
{
|
|
note += 12;
|
|
}
|
|
|
|
while (note > HIGHEST_NOTE)
|
|
{
|
|
note -= 12;
|
|
}
|
|
voice->note = note;
|
|
io->WriteFrequency(slot, note, voice->pitch, 1);
|
|
}
|
|
|
|
//----------------------------------------------------------------------------
|
|
//
|
|
//
|
|
//
|
|
//----------------------------------------------------------------------------
|
|
|
|
bool opl_singlevoice;
|
|
|
|
void musicBlock::noteOn(uint32_t channel, uint8_t key, int volume)
|
|
{
|
|
if (volume <= 0)
|
|
{
|
|
noteOff(channel, key);
|
|
return;
|
|
}
|
|
GenMidiInstrument *instrument;
|
|
|
|
// Percussion channel is treated differently.
|
|
if (channel == CHAN_PERCUSSION)
|
|
{
|
|
if (key < GENMIDI_FIST_PERCUSSION || key >= GENMIDI_FIST_PERCUSSION + GENMIDI_NUM_PERCUSSION)
|
|
{
|
|
return;
|
|
}
|
|
|
|
instrument = &OPLinstruments[key + (GENMIDI_NUM_INSTRS - GENMIDI_FIST_PERCUSSION)];
|
|
}
|
|
else
|
|
{
|
|
auto inst = oplchannels[channel].Instrument;
|
|
if (inst >= GENMIDI_NUM_TOTAL) return; // better safe than sorry.
|
|
instrument = &OPLinstruments[inst];
|
|
}
|
|
|
|
bool double_voice = ((instrument->flags) & GENMIDI_FLAG_2VOICE) && !opl_singlevoice;
|
|
|
|
int i = findFreeVoice();
|
|
if (i < 0) i = replaceExistingVoice();
|
|
|
|
if (i >= 0)
|
|
{
|
|
voiceKeyOn(i, channel, instrument, 0, key, volume);
|
|
if (double_voice)
|
|
{
|
|
i = findFreeVoice();
|
|
if (i >= 0)
|
|
{
|
|
voiceKeyOn(i, channel, instrument, 1, key, volume);
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
//----------------------------------------------------------------------------
|
|
//
|
|
//
|
|
//
|
|
//----------------------------------------------------------------------------
|
|
|
|
void musicBlock::noteOff(uint32_t id, uint8_t note)
|
|
{
|
|
uint32_t sustain = oplchannels[id].Sustain;
|
|
|
|
for(uint32_t i = 0; i < io->NumChannels; i++)
|
|
{
|
|
if (voices[i].index == id && voices[i].key == note)
|
|
{
|
|
if (sustain >= MIN_SUSTAIN)
|
|
{
|
|
voices[i].sustained = true;
|
|
voices[i].timestamp = ++timeCounter;
|
|
}
|
|
else releaseVoice(i, 0);
|
|
}
|
|
}
|
|
}
|
|
|
|
//----------------------------------------------------------------------------
|
|
//
|
|
//
|
|
//
|
|
//----------------------------------------------------------------------------
|
|
|
|
void musicBlock::changePitch(uint32_t id, int val1, int val2)
|
|
{
|
|
// Convert pitch from 14-bit to 7-bit, then scale it, since the player
|
|
// code only understands sensitivities of 2 semitones.
|
|
int pitch = ((val1 | (val2 << 7)) - 8192) * oplchannels[id].PitchSensitivity / (200 * 128) + 64;
|
|
oplchannels[id].Pitch = pitch;
|
|
for(uint32_t i = 0; i < io->NumChannels; i++)
|
|
{
|
|
auto &ch = voices[i];
|
|
if (ch.index == id)
|
|
{
|
|
ch.pitch = ch.fine_tuning + pitch;
|
|
io->WriteFrequency(i, ch.note, ch.pitch, 1);
|
|
}
|
|
}
|
|
}
|
|
|
|
//----------------------------------------------------------------------------
|
|
//
|
|
//
|
|
//
|
|
//----------------------------------------------------------------------------
|
|
|
|
void musicBlock::changeModulation(uint32_t id, int value)
|
|
{
|
|
bool vibrato = (value >= VIBRATO_THRESHOLD);
|
|
oplchannels[id].Vibrato = vibrato;
|
|
for (uint32_t i = 0; i < io->NumChannels; i++)
|
|
{
|
|
auto &ch = voices[i];
|
|
if (ch.index == id)
|
|
{
|
|
io->WriteTremolo(i, ch.current_instr_voice, vibrato);
|
|
}
|
|
}
|
|
}
|
|
|
|
//----------------------------------------------------------------------------
|
|
//
|
|
//
|
|
//
|
|
//----------------------------------------------------------------------------
|
|
|
|
void musicBlock::changeSustain(uint32_t id, int value)
|
|
{
|
|
oplchannels[id].Sustain = value;
|
|
if (value < MIN_SUSTAIN)
|
|
{
|
|
for (uint32_t i = 0; i < io->NumChannels; i++)
|
|
{
|
|
if (voices[i].index == id && voices[i].sustained)
|
|
releaseVoice(i, 0);
|
|
}
|
|
}
|
|
}
|
|
|
|
//----------------------------------------------------------------------------
|
|
//
|
|
// Change volume or expression.
|
|
// Since both go to the same register, one function can handle both.
|
|
//
|
|
//----------------------------------------------------------------------------
|
|
|
|
void musicBlock::changeVolume(uint32_t id, int value, bool expression)
|
|
{
|
|
auto &chan = oplchannels[id];
|
|
if (!expression) chan.Volume = value;
|
|
else chan.Expression = value;
|
|
for (uint32_t i = 0; i < io->NumChannels; i++)
|
|
{
|
|
auto &ch = voices[i];
|
|
if (ch.index == id)
|
|
{
|
|
io->WriteVolume(i, ch.current_instr_voice, chan.Volume, chan.Expression, ch.note_volume);
|
|
}
|
|
}
|
|
}
|
|
|
|
//----------------------------------------------------------------------------
|
|
//
|
|
//
|
|
//
|
|
//----------------------------------------------------------------------------
|
|
|
|
void musicBlock::changePanning(uint32_t id, int value)
|
|
{
|
|
oplchannels[id].Panning = value;
|
|
for(uint32_t i = 0; i < io->NumChannels; i++)
|
|
{
|
|
auto &ch = voices[i];
|
|
if (ch.index == id)
|
|
{
|
|
io->WritePan(i, ch.current_instr_voice, value);
|
|
}
|
|
}
|
|
}
|
|
|
|
//----------------------------------------------------------------------------
|
|
//
|
|
//
|
|
//
|
|
//----------------------------------------------------------------------------
|
|
|
|
void musicBlock::notesOff(uint32_t id, int value)
|
|
{
|
|
for (uint32_t i = 0; i < io->NumChannels; ++i)
|
|
{
|
|
if (voices[i].index == id)
|
|
{
|
|
if (oplchannels[id].Sustain >= MIN_SUSTAIN)
|
|
{
|
|
voices[i].sustained = true;
|
|
voices[i].timestamp = ++timeCounter;
|
|
}
|
|
else releaseVoice(i, 0);
|
|
}
|
|
}
|
|
}
|
|
|
|
//----------------------------------------------------------------------------
|
|
//
|
|
// release all notes for this channel
|
|
//
|
|
//----------------------------------------------------------------------------
|
|
|
|
void musicBlock::allNotesOff(uint32_t id, int value)
|
|
{
|
|
for (uint32_t i = 0; i < io->NumChannels; ++i)
|
|
{
|
|
if (voices[i].index == id)
|
|
{
|
|
releaseVoice(i, 0);
|
|
}
|
|
}
|
|
}
|
|
|
|
//----------------------------------------------------------------------------
|
|
//
|
|
//
|
|
//
|
|
//----------------------------------------------------------------------------
|
|
|
|
void musicBlock::changeExtended(uint32_t id, uint8_t controller, int value)
|
|
{
|
|
switch (controller)
|
|
{
|
|
case ctrlRPNHi:
|
|
oplchannels[id].RPN = (oplchannels[id].RPN & 0x007F) | (value << 7);
|
|
break;
|
|
|
|
case ctrlRPNLo:
|
|
oplchannels[id].RPN = (oplchannels[id].RPN & 0x3F80) | value;
|
|
break;
|
|
|
|
case ctrlNRPNLo:
|
|
case ctrlNRPNHi:
|
|
oplchannels[id].RPN = 0x3FFF;
|
|
break;
|
|
|
|
case ctrlDataEntryHi:
|
|
if (oplchannels[id].RPN == 0)
|
|
{
|
|
oplchannels[id].PitchSensitivity = value * 100 + (oplchannels[id].PitchSensitivity % 100);
|
|
}
|
|
break;
|
|
|
|
case ctrlDataEntryLo:
|
|
if (oplchannels[id].RPN == 0)
|
|
{
|
|
oplchannels[id].PitchSensitivity = value + (oplchannels[id].PitchSensitivity / 100) * 100;
|
|
}
|
|
break;
|
|
}
|
|
}
|
|
|
|
//----------------------------------------------------------------------------
|
|
//
|
|
//
|
|
//
|
|
//----------------------------------------------------------------------------
|
|
|
|
void musicBlock::resetControllers(uint32_t chan, int vol)
|
|
{
|
|
auto &channel = oplchannels[chan];
|
|
|
|
channel.Volume = vol;
|
|
channel.Expression = 127;
|
|
channel.Sustain = 0;
|
|
channel.Pitch = 64;
|
|
channel.RPN = 0x3fff;
|
|
channel.PitchSensitivity = 200;
|
|
}
|
|
|
|
//----------------------------------------------------------------------------
|
|
//
|
|
//
|
|
//
|
|
//----------------------------------------------------------------------------
|
|
|
|
void musicBlock::programChange(uint32_t channel, int value)
|
|
{
|
|
oplchannels[channel].Instrument = value;
|
|
}
|
|
|
|
//----------------------------------------------------------------------------
|
|
//
|
|
//
|
|
//
|
|
//----------------------------------------------------------------------------
|
|
|
|
void musicBlock::resetAllControllers(int vol)
|
|
{
|
|
uint32_t i;
|
|
|
|
for (i = 0; i < NUM_CHANNELS; i++)
|
|
{
|
|
resetControllers(i, vol);
|
|
}
|
|
}
|
|
|
|
//----------------------------------------------------------------------------
|
|
//
|
|
//
|
|
//
|
|
//----------------------------------------------------------------------------
|
|
|
|
void musicBlock::stopAllVoices()
|
|
{
|
|
for (uint32_t i = 0; i < io->NumChannels; i++)
|
|
{
|
|
if (voices[i].index != ~0u) releaseVoice(i, 1);
|
|
voices[i].timestamp = 0;
|
|
}
|
|
timeCounter = 0;
|
|
}
|