Changeset 29893 for main/trunk/model-sites-dev/respooled/collect/popup-video-respooled/js/game-on.js

Timestamp:

2015-05-18T16:42:17+12:00 (9 years ago)

Author:

davidb

Message:

Completed version of Krumhansl's algorithm. Plus adding in of About bar. Plus tidy up of the 'by xxx' template

File:

• main/trunk/model-sites-dev/respooled/collect/popup-video-respooled/js/game-on.js (modified) (3 diffs)

main/trunk/model-sites-dev/respooled/collect/popup-video-respooled/js/game-on.js

@@ -88 +88 @@
 }
 
+
+function computeMidiStats(track)
+{
+    var min_midi_pitch = num_midi_pitches-1;
+    var max_midi_pitch = 0;
+
+    var track_chromatic_durations = [];
+    for (var i=0; i<12; i++) {
+    track_chromatic_durations[i] = 0;
+    }
+
+    // Process each block within the track
+    for (var b=0; b<track.length; b++) {
+    var track_block = track[b];
+    //var base_ctime = track_block.baseCTime;
+    var block_events = track_block.events;
+
+    var block_chromatic_durations = [];
+    for (var i=0; i<12; i++) {
+        block_chromatic_durations[i] = 0;
+    }
+    
+    for (var ne=0; ne<block_events.length; ne++) {
+        var midi_pitch = block_events[ne].midiPitch;
+
+        if (midi_pitch < min_midi_pitch) {
+        min_midi_pitch = midi_pitch;
+        }
+        if (midi_pitch > max_midi_pitch) {
+        max_midi_pitch = midi_pitch;
+        }
+
+        var chromatic_pitch = midi_pitch % 12;
+        var chromatic_duration = block_events[ne].duration;
+        block_chromatic_durations[chromatic_pitch] += chromatic_duration;
+
+        track_chromatic_durations[chromatic_pitch] += chromatic_duration;
+    }
+
+    if (!("_computedKey" in track_block)) {
+        var strongest_profile = khKeyDetection(block_chromatic_durations);
+        track_block._computedKey = strongest_profile;
+        console.log("***### key prediction: " + strongest_profile);
+    }
+
+    }
+
+    if (!("_computedKey" in track)) {
+    var strongest_profile = khKeyDetection(track_chromatic_durations);
+    track._computedKey = strongest_profile;
+    }
+
+    return { "max_midi_pitch": max_midi_pitch, "min_midi_pitch": min_midi_pitch};
+}
+
+
 function displayActiveTrackLayers(docStorage)
 {
@@ -116 +172 @@
         if (track != null) {
 
+
+        var midi_stats = computeMidiStats(track);
+
+        if (midi_stats.min_midi_pitch < min_midi_pitch) {
+            min_midi_pitch = midi_stats.min_midi_pitch;
+        }
+        if (midi_stats.max_midi_pitch > max_midi_pitch) {
+            max_midi_pitch = midi_stats.max_midi_pitch;
+        }
+
+
         // calculate range of midi pitches present
+/*
         for (var b=0; b<track.length; b++) {
             var track_block = track[b];
@@ -132 +200 @@
             }
         }
+*/
+
         }
     }