68 lines
1.9 KiB
C
68 lines
1.9 KiB
C
#include "music.h"
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#include "dsp.h"
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#include "tsf.h"
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#include "tml.h"
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#include "mix.h"
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#include "sound.h"
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#define TSF_BLOCK 64
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struct dsp_filter cursong;
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struct dsp_midi_song gsong;
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void dsp_midi_fillbuf(struct dsp_midi_song *song, void *out, int n)
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{
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short *o = (short*)out;
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tml_message *midi = song->midi;
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for (int i = TSF_BLOCK; n; n -= i, o += n*CHANNELS) {
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if (i > n) i = n;
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for (song->time += i * (1000.f / SAMPLERATE); midi && song->time >= midi->time; midi = midi->next) {
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switch (midi->type)
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{
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case TML_PROGRAM_CHANGE:
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tsf_channel_set_presetnumber(song->sf, midi->channel, midi->program, (midi->channel == 9));
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break;
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case TML_NOTE_ON:
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tsf_channel_note_on(song->sf, midi->channel, midi->key, midi->velocity / 127.f);
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break;
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case TML_NOTE_OFF:
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tsf_channel_note_off(song->sf, midi->channel, midi->key);
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break;
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case TML_PITCH_BEND:
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tsf_channel_set_pitchwheel(song->sf, midi->channel, midi->pitch_bend);
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break;
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case TML_CONTROL_CHANGE:
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tsf_channel_midi_control(song->sf, midi->channel, midi->control, midi->control_value);
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break;
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}
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}
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tsf_render_short(song->sf, o, i, 0);
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}
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song->midi = midi;
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}
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void play_song(const char *midi, const char *sf)
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{
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gsong.midi = tml_load_filename("sounds/one-winged-angel.mid");
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gsong.sf = tsf_load_filename("sounds/mario.sf2");
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gsong.time = 0.f;
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tsf_set_output(gsong.sf, TSF_STEREO_INTERLEAVED, SAMPLERATE, 0.f);
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// Preset on 10th MIDI channel to use percussion sound bank if possible
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tsf_channel_set_bank_preset(gsong.sf, 9, 128, 0);
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cursong.data = &gsong;
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cursong.filter = dsp_midi_fillbuf;
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first_free_bus(cursong);
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}
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