99 lines
2.3 KiB
C
99 lines
2.3 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 "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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#include "stb_ds.h"
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#define TSF_BLOCK 32
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static struct {
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char *key;
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tsf **value;
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} *sf_hash = NULL;
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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 = 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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tsf *make_soundfont(const char *path)
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{
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int idx = shgeti(sf_hash, path);
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if (idx != -1) return sf_hash[idx].value;
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long rawlen;
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void *raw = slurp_file(path, &rawlen);
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tsf *sf = tsf_load_memory(raw,rawlen);
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free(raw);
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if (!sf) { YughWarn("Soundfont %s not found.", sf); return NULL; }
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tsf_set_output(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(sf, 0, 128, 0);
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shput(sf_hash, path, sf);
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return sf;
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}
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void dsp_midi_free(struct dsp_midi_song *ms)
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{
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free(ms->midi);
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tsf_close(ms->sf);
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free(ms);
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}
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dsp_node *dsp_midi(const char *midi, tsf *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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struct dsp_midi_song *ms = malloc(sizeof(*ms));
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ms->time = 0.0;
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ms->midi = tml_load_memory(raw, rawlen);
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ms->sf = tsf_copy(sf);
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return make_node(ms, dsp_midi_fillbuf, dsp_midi_free);
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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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plugin_node(dsp_midi(midi, make_soundfont(sf)), masterbus);
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}
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