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#include "sound.h"
#include "resource.h"
// Instrument mapping for MT32 tracks emulated under GM.
static const byte mt32_to_gm[128] = {
// 0 1 2 3 4 5 6 7 8 9 A B C D E F
0, 1, 0, 2, 4, 4, 5, 3, 16, 17, 18, 16, 16, 19, 20, 21, // 0x
6, 6, 6, 7, 7, 7, 8, 112, 62, 62, 63, 63, 38, 38, 39, 39, // 1x
88, 95, 52, 98, 97, 99, 14, 54, 102, 96, 53, 102, 81, 100, 14, 80, // 2x
48, 48, 49, 45, 41, 40, 42, 42, 43, 46, 45, 24, 25, 28, 27, 104, // 3x
32, 32, 34, 33, 36, 37, 35, 35, 79, 73, 72, 72, 74, 75, 64, 65, // 4x
66, 67, 71, 71, 68, 69, 70, 22, 56, 59, 57, 57, 60, 60, 58, 61, // 5x
61, 11, 11, 98, 14, 9, 14, 13, 12, 107, 107, 77, 78, 78, 76, 76, // 6x
47, 117, 127, 118, 118, 116, 115, 119, 115, 112, 55, 124, 123, 0, 14, 117 // 7x
};
namespace Kyra {
MusicPlayer::MusicPlayer(MidiDriver* driver, KyraEngine* engine) {
_engine = engine;
_driver = driver;
_passThrough = false;
_isPlaying = _nativeMT32 = false;
memset(_channel, 0, sizeof(MidiChannel*) * 16);
memset(_channelVolume, 255, sizeof(uint8) * 16);
_volume = 0;
int ret = open();
if (ret != MERR_ALREADY_OPEN && ret != 0) {
error("couldn't open midi driver");
}
}
MusicPlayer::~MusicPlayer() {
_driver->setTimerCallback(NULL, NULL);
close();
}
void MusicPlayer::setVolume(int volume) {
if (volume < 0)
volume = 0;
else if (volume > 255)
volume = 255;
if (_volume == volume)
return;
_volume = volume;
for (int i = 0; i < 16; ++i) {
if (_channel[i]) {
_channel[i]->volume(_channelVolume[i] * _volume / 255);
}
}
}
int MusicPlayer::open() {
// Don't ever call open without first setting the output driver!
if (!_driver)
return 255;
int ret = _driver->open();
if (ret)
return ret;
_driver->setTimerCallback(this, &onTimer);
return 0;
}
void MusicPlayer::close() {
if (_driver)
_driver->close();
_driver = 0;
}
void MusicPlayer::send(uint32 b) {
if (_passThrough) {
_driver->send(b);
return;
}
uint8 channel = (byte)(b & 0x0F);
if ((b & 0xFFF0) == 0x07B0) {
// Adjust volume changes by master volume
uint8 volume = (uint8)((b >> 16) & 0x7F);
_channelVolume[channel] = volume;
volume = volume * _volume / 255;
b = (b & 0xFF00FFFF) | (volume << 16);
} else if ((b & 0xF0) == 0xC0 && !_nativeMT32) {
b = (b & 0xFFFF00FF) | mt32_to_gm[(b >> 8) & 0xFF] << 8;
} else if ((b & 0xFFF0) == 0x007BB0) {
//Only respond to All Notes Off if this channel
//has currently been allocated
if (!_channel[channel])
return;
}
if (!_channel[channel])
_channel[channel] = (channel == 9) ? _driver->getPercussionChannel() : _driver->allocateChannel();
if (_channel[channel])
_channel[channel]->send(b);
}
void MusicPlayer::metaEvent(byte type, byte *data, uint16 length) {
switch (type) {
case 0x2F: // End of Track
_parser->jumpToTick(0);
break;
default:
warning("Unhandled meta event: 0x%02x", type);
break;
}
}
void MusicPlayer::playMusic(const char* file) {
uint32 size;
uint8* data = 0;
data = (_engine->resManager())->fileData(file, &size);
if (!data) {
warning("couldn't load '%s'", file);
return;
}
playMusic(data, size);
}
void MusicPlayer::playMusic(uint8* data, uint32 size) {
if (_isPlaying)
stopMusic();
_parser = MidiParser::createParser_XMIDI();
assert(_parser);
if (!_parser->loadMusic(data, size)) {
warning("Error reading track!");
delete _parser;
_parser = 0;
return;
}
_parser->setTrack(0);
_parser->setMidiDriver(this);
_parser->setTimerRate(getBaseTempo());
_isPlaying = true;
}
void MusicPlayer::stopMusic() {
_isPlaying = false;
if (_parser) {
_parser->unloadMusic();
delete _parser;
_parser = NULL;
}
}
void MusicPlayer::onTimer(void *refCon) {
MusicPlayer *music = (MusicPlayer *)refCon;
if (music->_isPlaying)
music->_parser->onTimer();
}
void MusicPlayer::playTrack(uint8 track) {
if (_parser) {
_isPlaying = true;
_parser->setTrack(track);
_parser->jumpToTick(0);
}
}
} // end of namespace Kyra
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