diff options
Diffstat (limited to 'drumgizmo/input')
| -rw-r--r-- | drumgizmo/input/midifile/midifile.cc | 451 |
1 files changed, 257 insertions, 194 deletions
diff --git a/drumgizmo/input/midifile/midifile.cc b/drumgizmo/input/midifile/midifile.cc index d73d382..54865ef 100644 --- a/drumgizmo/input/midifile/midifile.cc +++ b/drumgizmo/input/midifile/midifile.cc @@ -38,91 +38,154 @@ class MidiFile { public: - MidiFile(); - ~MidiFile() {} + MidiFile() = default; + ~MidiFile() = default; - 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; - smf_event_t *cur_event; - - MidiMapper mmap; - - // Parameters - std::string filename; - float speed; - int track; - std::string midimapfile; - bool loop; - double offset; + 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. }; -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; - } - - 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; + } + + // 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; } 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 == "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()); + } } bool MidiFile::start() { - return true; + return true; } void MidiFile::stop() @@ -135,63 +198,80 @@ void MidiFile::pre() event_t *MidiFile::run(size_t pos, size_t len, size_t *nevents) { - 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; + 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; } void MidiFile::post() @@ -199,73 +279,56 @@ 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*/ |