diff options
Diffstat (limited to 'drumgizmo/input/midifile')
| -rw-r--r-- | drumgizmo/input/midifile/midifile.cc | 451 |
1 files changed, 194 insertions, 257 deletions
diff --git a/drumgizmo/input/midifile/midifile.cc b/drumgizmo/input/midifile/midifile.cc index 54865ef..d73d382 100644 --- a/drumgizmo/input/midifile/midifile.cc +++ b/drumgizmo/input/midifile/midifile.cc @@ -38,154 +38,91 @@ class MidiFile { public: - MidiFile() = default; - ~MidiFile() = default; + MidiFile(); + ~MidiFile() {} - bool init(int instruments, char *inames[]); + bool init(int instruments, char *inames[]); - void setParm(std::string parm, std::string value); + void setParm(std::string parm, std::string value); - bool start(); - void stop(); - - void pre(); - event_t *run(size_t pos, size_t len, size_t *nevents); - void post(); + bool start(); + void stop(); + + void pre(); + event_t *run(size_t pos, size_t len, size_t *nevents); + void post(); private: - smf_t *smf{nullptr}; - smf_event_t *cur_event{nullptr}; - - MidiMapper mmap; - - // Parameters - std::string filename; - float speed{1.0}; - int track{-1}; // -1 is omni ie. all tracks - std::string midimapfile; - bool loop{false}; - double offset{0}; - double tempoOverrideBpm{-1}; // -1 is disabled. + smf_t *smf; + smf_event_t *cur_event; + + MidiMapper mmap; + + // Parameters + std::string filename; + float speed; + int track; + std::string midimapfile; + bool loop; + double offset; }; +MidiFile::MidiFile() +{ + cur_event = NULL; + smf = NULL; + + speed = 1.0; + track = -1; // -1 is OMNI/all tracks + loop = false; + offset = 0; +} + bool MidiFile::init(int instruments, char *inames[]) { - if(filename == "") - { - fprintf(stderr, "Missing midifile argument 'file'\n"); - return false; - } - - if(midimapfile == "") - { - fprintf(stderr, "Missing midimapfile argument 'midimap'.\n"); - return false; - } - - smf = smf_load(filename.c_str()); - - if(!smf) - { - fprintf(stderr, "Could not open midifile '%s'.\n", filename.c_str()); - return false; - } - - // Override tempo is supplied by the user - if(tempoOverrideBpm > 0) - { - // Tempo change event format: - // FF 51 03 tttttt - Set Tempo, in microseconds per MIDI quarter-note - unsigned char midiData[] = { 0xff, 0x51, 0x03, 0, 0, 0 }; - - unsigned int usecPerMinute = 60000000; - unsigned int mpqn = usecPerMinute / tempoOverrideBpm; - midiData[3] = (mpqn >> 0) & 0xff; - midiData[4] = (mpqn >> 8) & 0xff; - midiData[5] = (mpqn >> 16) & 0xff; - - smf_event_t* tempoChangeEvent = - smf_event_new_from_pointer(midiData, sizeof(midiData)); - - while(true) - { - smf_event_t* event = smf_peek_next_event(smf); - - // Skip all initial tempo events. - if((!smf_event_is_metadata(event)) && - (event->midi_buffer[1] == 0x51) && (event->midi_buffer[1] == 0x58)) - //if(smf_event_is_tempo_change_or_time_signature(event)) // only in latest smf - { - smf_skip_next_event(smf); - } - else - { - // No more tempo change event; stop searching. - break; - } - } - - // Add tempo change event to all tracks. - smf_track_t *track; - unsigned int trackNumber = 1; - while((track = smf_get_track_by_number(smf, trackNumber))) - { - smf_track_add_event_seconds(track, tempoChangeEvent, 0); - ++trackNumber; - } - } - - MidiMapParser p(midimapfile); - if(p.parse()) - { - fprintf(stderr, "Could not parse midimapfile '%s'.\n", midimapfile.c_str()); - return false; - } - mmap.midimap = p.midimap; - - for(int i = 0; i < instruments; ++i) - { - mmap.instrmap[inames[i]] = i; - } - - return true; + if(filename == "") { + fprintf(stderr, "Missing midifile argument 'file'\n"); + return false; + } + + if(midimapfile == "") { + fprintf(stderr, "Missing midimapfile argument 'midimap'.\n"); + return false; + } + + smf = smf_load(filename.c_str()); + + if(!smf) { + fprintf(stderr, "Could not open midifile '%s'.\n", filename.c_str()); + return false; + } + + MidiMapParser p(midimapfile); + if(p.parse()) { + fprintf(stderr, "Could not parse midimapfile '%s'.\n", midimapfile.c_str()); + return false; + } + mmap.midimap = p.midimap; + + for(int i = 0; i < instruments; i++) { + mmap.instrmap[inames[i]] = i; + } + + return true; } void MidiFile::setParm(std::string parm, std::string value) { - if(parm == "file") - { - filename = value; - } - - if(parm == "speed") - { - speed = atof(value.c_str()); - } - - if(parm == "track") - { - track = atoi(value.c_str()); - } - - if(parm == "midimap") - { - midimapfile = value; - } - - if(parm == "loop") - { - loop = true; - } - - if(parm == "tempo") - { - tempoOverrideBpm = atof(value.c_str()); - } + if(parm == "file") filename = value; + if(parm == "speed") speed = atof(value.c_str()); + if(parm == "track") track = atoi(value.c_str()); + if(parm == "midimap") midimapfile = value; + if(parm == "loop") loop = true; } bool MidiFile::start() { - return true; + return true; } void MidiFile::stop() @@ -198,80 +135,63 @@ void MidiFile::pre() event_t *MidiFile::run(size_t pos, size_t len, size_t *nevents) { - event_t *evs = nullptr; - size_t nevs = 0; - - double cur_max_time = (double)(pos + len) / (44100.0 / speed); - cur_max_time -= offset; - // double cur_min_time = (double)(pos) / (44100.0 / speed); - - if(!cur_event) - { - cur_event = smf_get_next_event(smf); - } - - while(cur_event && cur_event->time_seconds < cur_max_time) - { - if(!smf_event_is_metadata(cur_event)) - { - if( (cur_event->midi_buffer_length == 3) && - ((cur_event->midi_buffer[0] & NOTE_ON) == NOTE_ON) && - (track == -1 || cur_event->track_number == track) && - cur_event->midi_buffer[2] > 0) - { - if(evs == nullptr) - { - evs = (event_t *)malloc(sizeof(event_t) * 1000); - } - - int key = cur_event->midi_buffer[1]; - int velocity = cur_event->midi_buffer[2]; - - evs[nevs].type = TYPE_ONSET; - size_t evpos = cur_event->time_seconds * (44100.0 / speed); - evs[nevs].offset = evpos - pos; - - int i = mmap.lookup(key); - if(i != -1) - { - evs[nevs].instrument = i; - evs[nevs].velocity = velocity / 127.0; - - ++nevs; - if(nevs > 999) - { - fprintf(stderr, "Midi event overflow\n"); - break; - } - } - } - } - - cur_event = smf_get_next_event(smf); - } - - if(!cur_event) - { - if(loop) - { - smf_rewind(smf); - offset += cur_max_time; - } - else - { - if(evs == nullptr) - { - evs = (event_t *)malloc(sizeof(event_t) * 1000); - } - evs[nevs].type = TYPE_STOP; - evs[nevs].offset = len - 1; - ++nevs; - } - } - - *nevents = nevs; - - return evs; + event_t *evs = NULL; + size_t nevs = 0; + + double cur_max_time = (double)(pos + len) / (44100.0 / speed); + cur_max_time -= offset; + // double cur_min_time = (double)(pos) / (44100.0 / speed); + + if(!cur_event) cur_event = smf_get_next_event(smf); + + while(cur_event && cur_event->time_seconds < cur_max_time) { + if(!smf_event_is_metadata(cur_event)) { + if( (cur_event->midi_buffer_length == 3) && + ((cur_event->midi_buffer[0] & NOTE_ON) == NOTE_ON) && + (track == -1 || cur_event->track_number == track) && + cur_event->midi_buffer[2] > 0) { + + if(evs == NULL) evs = (event_t *)malloc(sizeof(event_t) * 1000); + + int key = cur_event->midi_buffer[1]; + int velocity = cur_event->midi_buffer[2]; + + evs[nevs].type = TYPE_ONSET; + size_t evpos = cur_event->time_seconds * (44100.0 / speed); + evs[nevs].offset = evpos - pos; + + int i = mmap.lookup(key); + if(i != -1) { + evs[nevs].instrument = i; + evs[nevs].velocity = velocity / 127.0; + + nevs++; + if(nevs > 999) { + fprintf(stderr, "PANIC!\n"); + break; + } + } + } + } + + cur_event = smf_get_next_event(smf); + } + + if(!cur_event) { + if(loop) { + smf_rewind(smf); + offset += cur_max_time; + } else { + if(evs == NULL) evs = (event_t *)malloc(sizeof(event_t) * 1000); + evs[nevs].type = TYPE_STOP; + evs[nevs].offset = len - 1; + nevs++; + } + } + + *nevents = nevs; + + return evs; } void MidiFile::post() @@ -279,56 +199,73 @@ void MidiFile::post() } extern "C" { - void *create() - { - return new MidiFile(); - } - - void destroy(void *h) - { - MidiFile *midifile = (MidiFile*)h; - delete midifile; - } - - bool init(void *h, int i, char *inames[]) - { - MidiFile *midifile = (MidiFile*)h; - return midifile->init(i, inames); - } - - void setparm(void *h, const char *parm, const char *value) - { - MidiFile *midifile = (MidiFile*)h; - midifile->setParm(parm, value); - } - - bool start(void *h) - { - MidiFile *midifile = (MidiFile*)h; - return midifile->start(); - } - - void stop(void *h) - { - MidiFile *midifile = (MidiFile*)h; - midifile->stop(); - } - - void pre(void *h) - { - MidiFile *midifile = (MidiFile*)h; - midifile->pre(); - } - - event_t *run(void *h, size_t pos, size_t len, size_t *nev) - { - MidiFile *midifile = (MidiFile*)h; - return midifile->run(pos, len, nev); - } - - void post(void *h) - { - MidiFile *midifile = (MidiFile*)h; - midifile->post(); - } + void *create() + { + return new MidiFile(); + } + + void destroy(void *h) + { + MidiFile *midifile = (MidiFile*)h; + delete midifile; + } + + bool init(void *h, int i, char *inames[]) + { + MidiFile *midifile = (MidiFile*)h; + return midifile->init(i, inames); + } + + void setparm(void *h, const char *parm, const char *value) + { + MidiFile *midifile = (MidiFile*)h; + midifile->setParm(parm, value); + } + + bool start(void *h) + { + MidiFile *midifile = (MidiFile*)h; + return midifile->start(); + } + + void stop(void *h) + { + MidiFile *midifile = (MidiFile*)h; + midifile->stop(); + } + + void pre(void *h) + { + MidiFile *midifile = (MidiFile*)h; + midifile->pre(); + } + + event_t *run(void *h, size_t pos, size_t len, size_t *nev) + { + MidiFile *midifile = (MidiFile*)h; + return midifile->run(pos, len, nev); + } + + void post(void *h) + { + MidiFile *midifile = (MidiFile*)h; + midifile->post(); + } } + +#ifdef TEST_AUDIOINPUTENGINEMIDIFILE +//Additional dependency files +//deps: +//Required cflags (autoconf vars may be used) +//cflags: +//Required link options (autoconf vars may be used) +//libs: +#include "test.h" + +TEST_BEGIN; + +// TODO: Put some testcode here (see test.h for usable macros). + +TEST_END; + +#endif/*TEST_AUDIOINPUTENGINEMIDIFILE*/ |