From 0f9bfb784b7bbccf86b7d7d241982ba4e703efd4 Mon Sep 17 00:00:00 2001
From: Eric Wong <normalperson@yhbt.net>
Date: Sun, 25 Aug 2013 11:40:19 +0000
Subject: preliminary support for avconv/avprobe from libav

avconv is capable of outputting to the .sox format, greatly
simplifying our life as it enables us to easily apply sox
effects on a per-source file basis.

dtas-sourceedit and the "source" protocol commands will need
to change to support internal priorities (like sink).
---
 test/test_source_av.rb | 114 +++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 114 insertions(+)
 create mode 100644 test/test_source_av.rb

(limited to 'test/test_source_av.rb')

diff --git a/test/test_source_av.rb b/test/test_source_av.rb
new file mode 100644
index 0000000..2104b7e
--- /dev/null
+++ b/test/test_source_av.rb
@@ -0,0 +1,114 @@
+# -*- encoding: binary -*-
+# Copyright (C) 2013, Eric Wong <normalperson@yhbt.net>
+# License: GPLv3 or later (https://www.gnu.org/licenses/gpl-3.0.txt)
+require './test/helper'
+require 'dtas/source/av'
+require 'tempfile'
+
+class TestSourceAv < Minitest::Unit::TestCase
+  def teardown
+    @tempfiles.each { |tmp| tmp.close! }
+  end
+
+  def setup
+    @tempfiles = []
+  end
+
+  def x(cmd)
+    system(*cmd)
+    assert $?.success?, cmd.inspect
+  end
+
+  def new_file(suffix)
+    tmp = Tempfile.new(%W(tmp .#{suffix}))
+    @tempfiles << tmp
+    cmd = %W(sox -r 44100 -b 16 -c 2 -n #{tmp.path} trim 0 1)
+    return tmp if system(*cmd)
+    nil
+  end
+
+  def test_flac
+    return if `which metaflac`.strip.size == 0
+    tmp = new_file('flac') or return
+
+    x(%W(metaflac --set-tag=FOO=BAR #{tmp.path}))
+    x(%W(metaflac --add-replay-gain #{tmp.path}))
+    source = DTAS::Source::Av.new(tmp.path)
+    assert_equal source.comments["FOO"], "BAR", source.inspect
+    rg = source.replaygain
+    assert_kind_of DTAS::ReplayGain, rg
+    assert_in_delta 0.0, rg.track_peak.to_f, 0.00000001
+    assert_in_delta 0.0, rg.album_peak.to_f, 0.00000001
+    assert_operator rg.album_gain.to_f, :>, 1
+    assert_operator rg.track_gain.to_f, :>, 1
+  end
+
+  def test_mp3gain
+    return if `which mp3gain`.strip.size == 0
+    a = new_file('mp3') or return
+    b = new_file('mp3') or return
+
+    # redirect stdout to /dev/null temporarily, mp3gain is noisy
+    File.open("/dev/null", "w") do |null|
+      old_out = $stdout.dup
+      $stdout.reopen(null)
+      begin
+        x(%W(mp3gain -q #{a.path} #{b.path}))
+      ensure
+        $stdout.reopen(old_out)
+        old_out.close
+      end
+    end
+
+    source = DTAS::Source::Av.new(a.path)
+    rg = source.replaygain
+    assert_kind_of DTAS::ReplayGain, rg
+    assert_in_delta 0.0, rg.track_peak.to_f, 0.00000001
+    assert_in_delta 0.0, rg.album_peak.to_f, 0.00000001
+    assert_operator rg.album_gain.to_f, :>, 1
+    assert_operator rg.track_gain.to_f, :>, 1
+  end
+
+  def test_offset
+    tmp = new_file('flac') or return
+    source = DTAS::Source::Av.new(*%W(#{tmp.path} 5s))
+    assert_equal 5, source.offset_samples
+
+    source = DTAS::Source::Av.new(*%W(#{tmp.path} 1:00:00.5))
+    expect = 1 * 60 * 60 * 44100 + (44100/2)
+    assert_equal expect, source.offset_samples
+
+    source = DTAS::Source::Av.new(*%W(#{tmp.path} 1:10.5))
+    expect = 1 * 60 * 44100 + (10 * 44100) + (44100/2)
+    assert_equal expect, source.offset_samples
+
+    source = DTAS::Source::Av.new(*%W(#{tmp.path} 10.03))
+    expect = (10 * 44100) + (44100 * 3/100.0)
+    assert_equal expect, source.offset_samples
+  end
+
+  def test_offset_us
+    tmp = new_file('flac') or return
+    source = DTAS::Source::Av.new(*%W(#{tmp.path} 441s))
+    assert_equal 10000.0, source.offset_us
+
+    source = DTAS::Source::Av.new(*%W(#{tmp.path} 22050s))
+    assert_equal 500000.0, source.offset_us
+
+    source = DTAS::Source::Av.new(tmp.path, '1')
+    assert_equal 1000000.0, source.offset_us
+  end
+
+  def test_format_from_file
+    Tempfile.open(%w(tmp .wav)) do |tmp|
+      # generate an empty file with 1s of audio
+      cmd = %W(sox -r 96000 -b 24 -c 2 -n #{tmp.path} trim 0 1)
+      system(*cmd)
+      assert $?.success?, "#{cmd.inspect} failed: #$?"
+      fmt = DTAS::Source::Av.new(tmp.path).format
+      assert_equal 96000, fmt.rate
+      assert_equal 2, fmt.channels
+      tmp.unlink
+    end
+  end
+end
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