From e88a2dde6e9154b3376ef89e5562bfee471bd0d3 Mon Sep 17 00:00:00 2001
From: Sebastian Hugentobler <sebastian@vanwa.ch>
Date: Thu, 22 Jun 2023 09:50:12 +0200
Subject: [PATCH] initial commit

---
 .gitignore            |  4 ++++
 PKGBUILD              | 20 +++++++++++++++++
 split-audacity-labels | 51 +++++++++++++++++++++++++++++++++++++++++++
 3 files changed, 75 insertions(+)
 create mode 100644 .gitignore
 create mode 100644 PKGBUILD
 create mode 100755 split-audacity-labels

diff --git a/.gitignore b/.gitignore
new file mode 100644
index 0000000..765efc1
--- /dev/null
+++ b/.gitignore
@@ -0,0 +1,4 @@
+*~
+.DS_Store
+*.pkg.tar.zst
+*.pkg.tar.zst.sig
diff --git a/PKGBUILD b/PKGBUILD
new file mode 100644
index 0000000..99436da
--- /dev/null
+++ b/PKGBUILD
@@ -0,0 +1,20 @@
+# Maintainer: Sebastian Hugentobler <shu@vanwa.ch>
+
+pkgname=split-audacity-labels
+pkgver=0.1.0
+pkgrel=1
+pkgdesc="Split an audio file along exported audacity labels."
+arch=("any")
+url="https://code.vanwa.ch"
+license=('MIT')
+depends=("ffmpeg" "python3")
+source=(
+  "split-audacity-labels"
+)
+sha256sums=("afd19f69358908cdbf2cd6048567ed32cd27ae22da1a69962eb6a5d7e30d84bb")
+
+package() {
+  cd "$srcdir/"
+
+  install -Dm 755 split-audacity-labels "$pkgdir/usr/bin/split-audacity-labels"
+}
diff --git a/split-audacity-labels b/split-audacity-labels
new file mode 100755
index 0000000..8c2fe17
--- /dev/null
+++ b/split-audacity-labels
@@ -0,0 +1,51 @@
+#!/usr/bin/env python3
+
+import subprocess
+import sys
+
+
+def main():
+    """split a music track into specified sub-tracks by calling ffmpeg from the shell"""
+
+    # check command line for original file and track list file
+    if len(sys.argv) != 3:
+        print("usage: split <original_track> <track_list>")
+        exit(1)
+
+    # record command line args
+    original_track = sys.argv[1]
+    track_list = sys.argv[2]
+
+    # create a template of the ffmpeg call in advance
+    cmd_string = 'ffmpeg -i "{tr}" -acodec copy -ss {st} -to {en} "{nm}.m4a"'
+    cmd_end_string = 'ffmpeg -i "{tr}" -acodec copy -ss {st} "{nm}.m4a"'
+
+    # read each line of the track list and split into start, end, name
+    lines = []
+    with open(track_list, "r") as f:
+        lines = f.readlines()
+
+    for idx, line in enumerate(lines):
+        next_line = None if idx + 1 == len(lines) else lines[idx + 1]
+
+        # skip comment and empty lines
+        if line.startswith("#") or len(line) <= 1:
+            continue
+
+        # create command string for a given track
+        _, start, name = line.strip().split("\t")
+        name = "{nr:0>2d} {nm}".format(nr=idx + 1, nm=name)
+
+        command = None
+        if next_line is not None:
+            end, _, _ = next_line.strip().split("\t")
+            command = cmd_string.format(tr=original_track, st=start, en=end, nm=name)
+        else:
+            command = cmd_end_string.format(tr=original_track, st=start, nm=name)
+
+        # use subprocess to execute the command in the shell
+        subprocess.call(command, shell=True)
+
+
+if __name__ == "__main__":
+    main()