From 71a9b4398568615ae5d3d23bd8d01033305b70d7 Mon Sep 17 00:00:00 2001
From: Fukurokudzu <sergei.fukurokudzu@gmail.com>
Date: Thu, 23 Feb 2023 21:41:43 +0500
Subject: [PATCH] First draft

---
 examples/ex2.mid        | Bin 0 -> 257 bytes
 lib/midilib/sequence.rb |  45 ++++++++++++++++++++++++++++++++++++++++
 testing.rb              |  19 +++++++++++++++++
 3 files changed, 64 insertions(+)
 create mode 100644 examples/ex2.mid
 create mode 100644 testing.rb

diff --git a/examples/ex2.mid b/examples/ex2.mid
new file mode 100644
index 0000000000000000000000000000000000000000..a89f20ce4c5966ea15268d445489da454f4303c0
GIT binary patch
literal 257
zcmeYb$w*;fU|?flWMF1|;2Tnu4dm%E{EuK^VUplr_#epx<o^$0RRmH%Mj$i$LWQ3N
zK$`7GZR5*r0{`_Hpqj!N{wpv7l`xBDI_Kx*r6!j+mZoIpn`kSzc={<AGW=)3Au+)w
hgTWz#!8wD$Bcq?8!N!5X!GXcqfx*L}pMmzq0|1gqN2CA%

literal 0
HcmV?d00001

diff --git a/lib/midilib/sequence.rb b/lib/midilib/sequence.rb
index da7a70f..475d342 100644
--- a/lib/midilib/sequence.rb
+++ b/lib/midilib/sequence.rb
@@ -69,6 +69,51 @@ def beats_per_minute
       event = @tracks.first.events.detect { |e| e.is_a?(MIDI::Tempo) }
       event ? Tempo.mpq_to_bpm(event.tempo) : DEFAULT_TEMPO
     end
+
+    def get_tempo_parts
+      tempo_parts = {}
+      Array(@tracks).each do |track|
+        track.events.map do |e|
+          tempo_parts[e.time_from_start] = Tempo.mpq_to_bpm(e.tempo) if e.is_a?(MIDI::Tempo)
+        end
+      end
+      tempo_parts
+    end
+
+    def avg_beats_per_minute
+      return DEFAULT_TEMPO if @tracks.nil? || @tracks.empty?
+
+      bpm_min = tempo_parts.min
+      bpm_max = tempo_parts.max
+      tempo_events ? Tempo.mpq_to_bpm(event.tempo) : DEFAULT_TEMPO
+      # parts_lenght(tempo_parts.keys, self.get_measures.last.end)
+    end
+
+    def beats_per_minute_now
+
+    end
+
+    # def avg_beats_per_minute
+    #   return DEFAULT_TEMPO if @tracks.nil? || @tracks.empty?
+    #   tempo_parts = {}
+    #   Array(@tracks).each do |track|
+    #     track.events.map do |e|
+    #       tempo_parts[e.time_from_start] = Tempo.mpq_to_bpm(e.tempo) if e.is_a?(MIDI::Tempo)
+    #     end
+    #   end
+    #   # tempo_events ? Tempo.mpq_to_bpm(event.tempo) : DEFAULT_TEMPO
+    #   # parts_lenght(tempo_parts.keys, self.get_measures.last.end)
+    # end
+
+    # def parts_lenght(start_points, track_ends)
+    #   parts_lenght = []
+    #   start_points.each_with_index do |start_point, i|
+    #     start_points[i+1].nil? ? part_end = track_ends : part_end = start_points[i+1]
+    #     parts_lenght << part_end - start_point
+    #   end
+    #   parts_lenght
+    # end
+
     alias bpm beats_per_minute
     alias tempo beats_per_minute
 
diff --git a/testing.rb b/testing.rb
new file mode 100644
index 0000000..92c22a5
--- /dev/null
+++ b/testing.rb
@@ -0,0 +1,19 @@
+require_relative('lib/midilib')
+
+# Create a new, empty sequence.
+seq = MIDI::Sequence.new()
+
+# Read the contents of a MIDI file into the sequence.
+File.open('examples/ex2.mid', 'rb') { | file |
+  seq.read(file) { | track, num_tracks, i |
+    Array(track).each do |event|
+      # if MIDI::Tempo === event
+        # p event.data
+      # end
+      
+    end
+  
+  }
+  seq.avg_beats_per_minute
+  # p MIDI::META_TRACK_END
+}
\ No newline at end of file