From b79f51dbc0b3d905e1021cfe31b8d006c7256ef1 Mon Sep 17 00:00:00 2001
From: vasanth <vasanth.mani.vasi.2@gmail.com>
Date: Wed, 31 Mar 2021 21:34:42 +0530
Subject: [PATCH 1/5] Added time signature

---
 src/midifile.jl | 23 ++++++++++++++++++++++-
 1 file changed, 22 insertions(+), 1 deletion(-)

diff --git a/src/midifile.jl b/src/midifile.jl
index 062789e..0d73e3d 100644
--- a/src/midifile.jl
+++ b/src/midifile.jl
@@ -1,5 +1,5 @@
 export MIDIFile, readMIDIFile, writeMIDIFile
-export BPM, ms_per_tick
+export BPM, time_signature, ms_per_tick
 
 """
     MIDIFile <: Any
@@ -150,7 +150,28 @@ function BPM(t::MIDI.MIDIFile)
     bpm = 60000000/μs
 end
 
+"""
+    time_signature(midi)
+Return the time signature of the given `MIDIFile`.
+"""
+function time_signature(t::MIDI.MIDIFile)
+    # Find the one that corresponds to Time Signature:
+    # FF 58 04 nn dd cc bb Time Signature
+    # See here (page 8):
+    # http://www.cs.cmu.edu/~music/cmsip/readings/Standard-MIDI-file-format-updated.pdf
+    for event in t.tracks[1].events
+        if typeof(event) == MetaEvent
+            if event.metatype == 0x58
+                nn, dd = event.data
+                ts = join(map(string, [nn, dd^2]), '/')
+                return ts
+            end
+        end
+    end
 
+    # Default time signature if it is not present in the file
+    return "4/4"
+end
 
 """
     ms_per_tick(tpq, bpm)

From 895afcf7a663efa86dbf49caccda93290128918b Mon Sep 17 00:00:00 2001
From: vasanth <vasanth.mani.vasi.2@gmail.com>
Date: Wed, 31 Mar 2021 21:44:34 +0530
Subject: [PATCH 2/5] Added tests

---
 test/runtests.jl | 1 +
 test/utils.jl    | 7 +++++++
 2 files changed, 8 insertions(+)
 create mode 100644 test/utils.jl

diff --git a/test/runtests.jl b/test/runtests.jl
index 58f2ebf..ccf81ec 100644
--- a/test/runtests.jl
+++ b/test/runtests.jl
@@ -9,3 +9,4 @@ include("metaevent.jl")
 include("miditrack.jl")
 include("midiio.jl")
 include("negative_delta.jl")
+include("utils.jl")
diff --git a/test/utils.jl b/test/utils.jl
new file mode 100644
index 0000000..0c2865d
--- /dev/null
+++ b/test/utils.jl
@@ -0,0 +1,7 @@
+cd(@__DIR__)
+
+@testset "Time Signature" begin
+    midi = readMIDIFile("doxy.mid")
+    @test time_signature(midi) == "4/4"
+end
+

From 17076d4bde0fa0f931f10947b3d9e40cf238ce26 Mon Sep 17 00:00:00 2001
From: vasanth <vasanth.mani.vasi.2@gmail.com>
Date: Wed, 31 Mar 2021 23:01:49 +0530
Subject: [PATCH 3/5] Correct time_signature

---
 src/midifile.jl | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/midifile.jl b/src/midifile.jl
index 0d73e3d..b991596 100644
--- a/src/midifile.jl
+++ b/src/midifile.jl
@@ -163,7 +163,7 @@ function time_signature(t::MIDI.MIDIFile)
         if typeof(event) == MetaEvent
             if event.metatype == 0x58
                 nn, dd = event.data
-                ts = join(map(string, [nn, dd^2]), '/')
+                ts = join(map(string, [nn, 2^dd]), '/')
                 return ts
             end
         end

From 710218b6d220854ba5011393221de986967e6498 Mon Sep 17 00:00:00 2001
From: vasanth <vasanth.mani.vasi.2@gmail.com>
Date: Thu, 1 Apr 2021 10:26:01 +0530
Subject: [PATCH 4/5] Make requested changes

---
 src/midifile.jl | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/src/midifile.jl b/src/midifile.jl
index b991596..e377643 100644
--- a/src/midifile.jl
+++ b/src/midifile.jl
@@ -153,6 +153,7 @@ end
 """
     time_signature(midi)
 Return the time signature of the given `MIDIFile`.
+Returns 4/4 if it doesn't find a time signature.
 """
 function time_signature(t::MIDI.MIDIFile)
     # Find the one that corresponds to Time Signature:
@@ -163,7 +164,7 @@ function time_signature(t::MIDI.MIDIFile)
         if typeof(event) == MetaEvent
             if event.metatype == 0x58
                 nn, dd = event.data
-                ts = join(map(string, [nn, 2^dd]), '/')
+                ts = string(nn) * "/" * string(2^dd)
                 return ts
             end
         end

From 891ee7e163624d3b4da7ebca6e9ebdd868c70a14 Mon Sep 17 00:00:00 2001
From: vasanth <vasanth.mani.vasi.2@gmail.com>
Date: Thu, 1 Apr 2021 10:26:21 +0530
Subject: [PATCH 5/5] Update Project.toml and CHANGELOG.md

---
 CHANGELOG.md | 2 ++
 Project.toml | 2 +-
 2 files changed, 3 insertions(+), 1 deletion(-)

diff --git a/CHANGELOG.md b/CHANGELOG.md
index 62c9832..22284df 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -4,6 +4,8 @@ All notable changes to this project will be documented in this file.
 
 The format is based on [Keep a Changelog](http://keepachangelog.com/en/1.0.0/)
 and this project adheres to [Semantic Versioning](http://semver.org/spec/v2.0.0.html).
+# v1.10.0
+* Added `time_signature` that returns the time signature of a given MIDI.
 # v1.9.0
 * `name_to_pitch` now accepts flat names and `pitch_to_name` accepts `flat` keyword argument.
 # v1.8.0
diff --git a/Project.toml b/Project.toml
index b021b80..29c213c 100644
--- a/Project.toml
+++ b/Project.toml
@@ -1,7 +1,7 @@
 name = "MIDI"
 uuid = "f57c4921-e30c-5f49-b073-3f2f2ada663e"
 repo = "https://github.com/JuliaMusic/MIDI.jl.git"
-version = "1.9.0"
+version = "1.10.0"
 
 [compat]
 julia = "1"