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Add a (naive) loopback implementation (#132)

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* WIP

* Implement alsapcm_polldescriptors_revents and alspcm_avail

* Open/close the playback device when idle.

It takes a long time until it's stopped, though.

* open/close logic of playback device

* Fix opening logic, make period size divisible by 6

* Be less verbose in level info

* Extra argument for output mixer card index

Sometimes, this cannot be deduced from the output device

* Better silence detection

* Run run_after_stop when idle on startup
This commit is contained in:
Lars Immisch
2023-09-12 21:04:02 +02:00
committed by GitHub
parent cd44517ed5
commit 67adbf0524
3 changed files with 365 additions and 60 deletions
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37
test.py
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@@ -11,6 +11,7 @@
import unittest
import alsaaudio
import warnings
from contextlib import closing
# we can't test read and write well - these are tested otherwise
PCMMethods = [
@@ -20,7 +21,7 @@ PCMMethods = [
]
PCMDeprecatedMethods = [
('setchannels', (2,)),
('setchannels', (2,)),
('setrate', (44100,)),
('setformat', (alsaaudio.PCM_FORMAT_S8,)),
('setperiodsize', (320,))
@@ -49,10 +50,10 @@ class MixerTest(unittest.TestCase):
def testMixer(self):
"""Open the default Mixers and the Mixers on every card"""
for c in alsaaudio.card_indexes():
mixers = alsaaudio.mixers(cardindex=c)
for m in mixers:
mixer = alsaaudio.Mixer(m, cardindex=c)
mixer.close()
@@ -73,7 +74,7 @@ class MixerTest(unittest.TestCase):
mixer.close()
def testMixerClose(self):
"""Run common Mixer methods on a closed object and verify it raises an
"""Run common Mixer methods on a closed object and verify it raises an
error"""
mixers = alsaaudio.mixers()
@@ -133,7 +134,7 @@ class PCMTest(unittest.TestCase):
pcm = alsaaudio.PCM(card='default')
except alsaaudio.ALSAAudioError:
pass
# Verify we got a DepreciationWarning
self.assertEqual(len(w), 1, "PCM(card='default') expected a warning" )
self.assertTrue(issubclass(w[-1].category, DeprecationWarning), "PCM(card='default') expected a DeprecationWarning")
@@ -156,5 +157,31 @@ class PCMTest(unittest.TestCase):
self.assertEqual(len(w), 1, method + " expected a warning")
self.assertTrue(issubclass(w[-1].category, DeprecationWarning), method + " expected a DeprecationWarning")
class PollDescriptorArgsTest(unittest.TestCase):
'''Test invalid args for polldescriptors_revents (takes a list of tuples of 2 integers)'''
def testArgsNoList(self):
with closing(alsaaudio.PCM()) as pcm:
with self.assertRaises(TypeError):
pcm.polldescriptors_revents('foo')
def testArgsListButNoTuples(self):
with closing(alsaaudio.PCM()) as pcm:
with self.assertRaises(TypeError):
pcm.polldescriptors_revents(['foo', 1])
def testArgsListButInvalidTuples(self):
with closing(alsaaudio.PCM()) as pcm:
with self.assertRaises(TypeError):
pcm.polldescriptors_revents([('foo', 'bar')])
def testArgsListTupleWrongLength(self):
with closing(alsaaudio.PCM()) as pcm:
with self.assertRaises(TypeError):
pcm.polldescriptors_revents([(1, )])
with self.assertRaises(TypeError):
pcm.polldescriptors_revents([(1, 2, 3)])
if __name__ == '__main__':
unittest.main()