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100 lines
3.2 KiB
100 lines
3.2 KiB
/*
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Calf Box, an open source musical instrument.
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Copyright (C) 2010-2011 Krzysztof Foltman
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This program is free software: you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation, either version 3 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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#ifndef CBOX_MASTER_H
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#define CBOX_MASTER_H
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#include <stdint.h>
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#include "cmd.h"
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extern uint64_t PPQN;
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struct cbox_song;
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struct cbox_rt;
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#define GET_RT_FROM_cbox_master(ptr) ((ptr)->engine->rt)
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enum cbox_master_transport_state
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{
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CMTS_STOP,
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CMTS_ROLLING,
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CMTS_STOPPING,
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};
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struct cbox_master
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{
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int srate;
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float tempo, new_tempo;
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int timesig_num;
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int timesig_denom; // must be 4 for now
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uint64_t ppqn_factor;
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enum cbox_master_transport_state state;
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struct cbox_engine *engine;
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struct cbox_song *song;
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struct cbox_song_playback *spb;
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struct cbox_command_target cmd_target;
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};
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struct cbox_bbt
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{
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uint32_t bar;
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uint32_t beat;
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uint32_t tick;
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uint32_t offset_samples;
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};
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struct cbox_master_track_item;
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static inline void cbox_bbt_add(struct cbox_bbt *accum, uint32_t ticks, uint32_t ppqn_factor, uint32_t timesig_num, uint32_t timesig_denom)
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{
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uint32_t ticks_per_beat = ppqn_factor * 4 / timesig_denom;
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uint32_t beats_per_bar = timesig_num;
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accum->tick += ticks % ticks_per_beat;
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if (accum->tick >= ticks_per_beat)
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{
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accum->tick -= ticks_per_beat;
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accum->beat++;
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}
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uint32_t inc_beats = ticks / ticks_per_beat;
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accum->beat += inc_beats % beats_per_bar;
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if (accum->beat >= beats_per_bar)
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{
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accum->beat -= beats_per_bar;
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accum->bar++;
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}
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accum->bar += inc_beats / beats_per_bar;
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}
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extern struct cbox_master *cbox_master_new(struct cbox_engine *engine);
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extern void cbox_master_set_sample_rate(struct cbox_master *master, int srate);
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extern void cbox_master_set_tempo(struct cbox_master *master, float tempo);
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extern void cbox_master_set_timesig(struct cbox_master *master, int beats, int unit);
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extern void cbox_master_ppqn_to_bbt(const struct cbox_master *master, struct cbox_bbt *bbt, int time_ppqn, struct cbox_master_track_item *mti);
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//extern uint32_t cbox_master_song_pos_from_bbt(struct cbox_master *master, const struct cbox_bbt *bbt);
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extern void cbox_master_play(struct cbox_master *master);
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extern void cbox_master_stop(struct cbox_master *master);
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extern void cbox_master_panic(struct cbox_master *master);
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extern void cbox_master_seek_ppqn(struct cbox_master *master, uint32_t pos_ppqn);
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extern void cbox_master_seek_samples(struct cbox_master *master, uint32_t pos_samples);
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extern void cbox_master_destroy(struct cbox_master *master);
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uint32_t cbox_master_ppqn_to_samples(struct cbox_master *master, uint32_t time_ppqn);
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uint32_t cbox_master_samples_to_ppqn(struct cbox_master *master, uint32_t time_samples);
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#endif
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