99 lines
2.2 KiB
C
99 lines
2.2 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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#include "log.h"
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#include "resources.h"
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#include <stdlib.h>
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#define TSF_BLOCK 32
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struct dsp_midi_song gsong;
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struct dsp_filter songfil;
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float music_pan = 0.f;
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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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soundbyte *o = (soundbyte*)out;
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tml_message *midi = song->midi;
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for (int i = 0; i < n; i += TSF_BLOCK) {
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while (midi && song->time >= midi->time) {
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switch (midi->type) {
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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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midi = midi->next;
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}
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tsf_render_float(song->sf, o, TSF_BLOCK, 0);
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o += TSF_BLOCK*CHANNELS;
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song->time += TSF_BLOCK * (1000.f/SAMPLERATE);
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}
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song->midi = midi;
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}
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struct bus *musicbus;
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void play_song(const char *midi, const char *sf)
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{
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long rawlen;
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void *raw = slurp_file(midi, &rawlen);
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gsong.midi = tml_load_memory(raw, rawlen);
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if (gsong.midi == NULL) {
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YughWarn("Midi %s not found.", midi);
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free(raw);
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return;
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}
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free(raw);
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raw = slurp_file(sf, &rawlen);
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gsong.sf = tsf_load_memory(raw, rawlen);
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if (gsong.sf == NULL) {
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YughWarn("SF2 %s not found.", sf);
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free(raw);
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return;
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}
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free(raw);
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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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songfil.data = &gsong;
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songfil.filter = dsp_midi_fillbuf;
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filter_to_bus(&songfil);
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}
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void music_stop()
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{
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unplug_filter(&songfil);
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}
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