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authorBent Bisballe Nyeng <deva@aasimon.org>2015-12-18 19:01:55 +0100
committerBent Bisballe Nyeng <deva@aasimon.org>2015-12-18 19:01:55 +0100
commit5656f572f1fac2a32033927ff184a81103cd60b9 (patch)
tree5b75288265fc1e84aed140da885a583822c14014 /drumgizmo/input
parent8a410c2c6cd0ac5c0c63d522f6ccd39c778f1496 (diff)
Experimental tempo change for midifile input module.
Diffstat (limited to 'drumgizmo/input')
-rw-r--r--drumgizmo/input/midifile/midifile.cc451
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*/