feat: Preview: Add audio preview controls and visualization

* Remove the delay when starting a playback
* Don't scrub during seek when dragging the slider
* Don't open audio stream connections before playing
* Determine the duration early to prevent missing duration info
+ Show total duration
+ Add option to display remaining play time
+ Add possibility to seek by clicking into the seekbar
+ Add possibility to seek by scrolling with the mouse wheel
+ Add fast forward and rewind buttons
+ Add buttons to change the playback speed
+ Add automatic restoration of the audio player settings in a session
+ Add automatic stop of other streams when starting to play
+ Add a visualization of the RMS peaks

1 files changed, 25 insertions, 0 deletions

diff --git a/test/no_gui/test_text_helpers.py b/test/no_gui/test_text_helpers.py
index 86897829c..c71b8ee8e 100644
--- a/test/no_gui/test_text_helpers.py
+++ b/test/no_gui/test_text_helpers.py
@@ -2,6 +2,7 @@ import unittest
 
 from gajim.common.text_helpers import escape_iri_path_segment
 from gajim.common.text_helpers import jid_to_iri
+from gajim.common.text_helpers import format_duration
 
 
 class Test(unittest.TestCase):
@@ -30,6 +31,30 @@ class Test(unittest.TestCase):
         self.assertEqual(jid_to_iri(jid),
             r'xmpp:my%5C20self@%5B::1%5D/home', jid)
 
+    def test_format_duration_width(self):
+        def do(total_seconds, expected):
+            self.assertEqual(format_duration(0.0, total_seconds*1e9), expected)
+
+        do(        0,      '0:00')
+        do(       60,      '0:00')
+        do(    10*60,     '00:00')
+        do(    60*60,   '0:00:00')
+        do( 10*60*60,  '00:00:00')
+        do(100*60*60, '000:00:00')
+
+    def test_format_duration(self):
+        def do(duration, expected):
+            self.assertEqual(format_duration(duration, 100*60*60*1e9), expected)
+
+        do(               1.0, '000:00:00')
+        do(       999999999.0, '000:00:00')
+        do(      1000000000.0, '000:00:01')
+        do(     59999999999.0, '000:00:59')
+        do(     60000000000.0, '000:01:00')
+        do(   3599999999999.0, '000:59:59')
+        do(   3600000000000.0, '001:00:00')
+        do(3599999999999999.0, '999:59:59')
+
 
 if __name__ == '__main__':
     unittest.main()