add timecode

LICENSE

@@ -1,6 +1,6 @@
 MIT License
 
-Copyright (c) 2023 ABEMA
+Copyright (c) 2023 AbemaTV
 
 Permission is hereby granted, free of charge, to any person obtaining a copy
 of this software and associated documentation files (the "Software"), to deal

README.md

@@ -1 +1,29 @@
-# go-timecode
+go-timecode
+===========
+
+[![GoDoc](https://godoc.org/github.com/abema/go-timecode/timecode?status.svg)](https://godoc.org/github.com/abema/go-timecode/timecode)
+
+go-timecode is a Go library for SMPTE 12M timecodes.
+
+Features
+-----------
+
+- supports drop-frame (DF) and non-drop-frame (NDF)
+- supports standard film, video, and television editing rates of 10, 15, 23.976, 24, 25, 29.97, 30, 48, 50, 59.94, 60
+- timecode and number of frames can be calculated
+- convertable between timecode and number of frames
+
+Installation
+-----------
+
+```shell
+go get github.com/abema/go-timecode/timecode
+```
+
+Usage
+-----------
+[GoDoc Examples](https://godoc.org/github.com/abema/go-timecode/timecode/#pkg-examples).
+
+License
+-----------
+go-timecode is available under the [MIT License](https://opensource.org/license/mit/).

go.mod

@@ -0,0 +1,11 @@
+module github.com/abema/go-timecode
+
+go 1.19
+
+require github.com/stretchr/testify v1.8.4
+
+require (
+	github.com/davecgh/go-spew v1.1.1 // indirect
+	github.com/pmezard/go-difflib v1.0.0 // indirect
+	gopkg.in/yaml.v3 v3.0.1 // indirect
+)

go.sum

@@ -0,0 +1,10 @@
+github.com/davecgh/go-spew v1.1.1 h1:vj9j/u1bqnvCEfJOwUhtlOARqs3+rkHYY13jYWTU97c=
+github.com/davecgh/go-spew v1.1.1/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
+github.com/pmezard/go-difflib v1.0.0 h1:4DBwDE0NGyQoBHbLQYPwSUPoCMWR5BEzIk/f1lZbAQM=
+github.com/pmezard/go-difflib v1.0.0/go.mod h1:iKH77koFhYxTK1pcRnkKkqfTogsbg7gZNVY4sRDYZ/4=
+github.com/stretchr/testify v1.8.4 h1:CcVxjf3Q8PM0mHUKJCdn+eZZtm5yQwehR5yeSVQQcUk=
+github.com/stretchr/testify v1.8.4/go.mod h1:sz/lmYIOXD/1dqDmKjjqLyZ2RngseejIcXlSw2iwfAo=
+gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405 h1:yhCVgyC4o1eVCa2tZl7eS0r+SDo693bJlVdllGtEeKM=
+gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0=
+gopkg.in/yaml.v3 v3.0.1 h1:fxVm/GzAzEWqLHuvctI91KS9hhNmmWOoWu0XTYJS7CA=
+gopkg.in/yaml.v3 v3.0.1/go.mod h1:K4uyk7z7BCEPqu6E+C64Yfv1cQ7kz7rIZviUmN+EgEM=

timecode/example_test.go

@@ -0,0 +1,94 @@
+package timecode_test
+
+import (
+	"fmt"
+
+	"github.com/abema/go-timecode/timecode"
+)
+
+func ExampleNewTimecode() {
+	tc, err := timecode.NewTimecode(1800, 30000, 1001)
+	if err != nil {
+		panic(1)
+	}
+	fmt.Println(tc)
+	// Output: 00:01:00:02
+}
+
+func ExampleParseTimecode() {
+	tc, err := timecode.ParseTimecode("00:09:00:00", 30000, 1001)
+	if err != nil {
+		panic(1)
+	}
+	fmt.Println(tc)
+	// Output: 00:09:00:02
+}
+
+func ExampleReset() {
+	tc, err := timecode.NewTimecode(1798, 30000, 1001)
+	if err != nil {
+		panic(1)
+	}
+	tcc, _ := timecode.Reset(tc, 1800)
+	fmt.Println(tcc)
+	// Output: 00:01:00:02
+}
+
+func ExampleTimecode_Add() {
+	tc1, err := timecode.NewTimecode(1798, 30000, 1001)
+	if err != nil {
+		panic(1)
+	}
+	tc2, err := timecode.NewTimecode(2, 30000, 1001)
+	if err != nil {
+		panic(1)
+	}
+	tc3, _ := tc1.Add(tc2)
+	fmt.Println(tc3)
+	// Output:
+	// 00:01:00:02
+}
+
+func ExampleTimecode_AddFrames() {
+	tc1, err := timecode.NewTimecode(1798, 30000, 1001)
+	if err != nil {
+		panic(1)
+	}
+
+	tc2, _ := tc1.AddFrames(2)
+	fmt.Println(tc2)
+	// Output: 00:01:00:02
+}
+
+func ExampleTimecode_Sub() {
+	tc1, err := timecode.NewTimecode(1800, 30000, 1001)
+	if err != nil {
+		panic(1)
+	}
+	tc2, err := timecode.NewTimecode(2, 30000, 1001)
+	if err != nil {
+		panic(1)
+	}
+	tc3, _ := tc1.Sub(tc2)
+	fmt.Println(tc3)
+	// Output: 00:00:59:28
+}
+
+func ExampleTimecode_SubFrames() {
+	tc1, err := timecode.NewTimecode(1800, 30000, 1001)
+	if err != nil {
+		panic(1)
+	}
+	tc2, _ := tc1.SubFrames(2)
+	fmt.Println(tc2)
+	// Output: 00:00:59:28
+}
+
+func ExampleTimecode_String() {
+	tc, err := timecode.NewTimecode(3600, 60000, 1001)
+	if err != nil {
+		panic(1)
+	}
+	fmt.Println(tc.String())
+	// Output: 00:01:00:04
+}