SineWaveAudioInputStreamGenerator restart issue

[ewjmulder]

Seems like a audio stream generated by SineWaveAudioInputStreamGenerator is not restarting properly.

Scenario:
Scenario scenario = scenario(room, settings(fixed(generate(format, 500, 10_000)), fixed(5, 10, 10), fixed(5, 5, 5),
fixed(fixedSpeakerVolumeRatios), fractional(), forever()));

Output:
2018-04-23 14:41:47 [main] ImmerseMixer.initializeSoundCardStreams() - INFO: Exception for mixer info: 'PCH [plughw:0,0]'. Known Java Sound API issue, falling back to default audio device.
2018-04-23 14:41:47 [main] ImmerseMixer.lambda$32() - INFO: Main mixer changed from state NEW to WARMUP
2018-04-23 14:41:49 [Warmup Mixer Executor] ImmerseMixer.lambda$32() - INFO: Main mixer changed from state WARMUP to INITIALIZED
2018-04-23 14:41:49 [Warmup Mixer Executor] ImmerseMixer.warmup() - INFO: Warmup completed in 1.471 seconds
2018-04-23 14:41:49 [Main Mixer Worker] ImmerseMixer.lambda$32() - INFO: Main mixer changed from state INITIALIZED to STARTED
2018-04-23 14:41:49 [Main Mixer Worker] ImmerseMixer.lambda$32() - INFO: Main mixer started scenario Scenario
2018-04-23 14:41:59 [Main Mixer Worker] ImmerseMixer.lambda$32() - INFO: Main mixer restarted scenario Scenario
2018-04-23 14:41:59 [Main Mixer Worker] ImmerseMixer.lambda$32() - INFO: Main mixer started scenario Scenario
2018-04-23 14:41:59 [Main Mixer Worker] ImmerseMixer.lambda$32() - INFO: Main mixer restarted scenario Scenario
2018-04-23 14:41:59 [Main Mixer Worker] ImmerseMixer.lambda$32() - INFO: Main mixer started scenario Scenario
2018-04-23 14:41:59 [Main Mixer Worker] ImmerseMixer.lambda$32() - INFO: Main mixer restarted scenario Scenario
2018-04-23 14:41:59 [Main Mixer Worker] ImmerseMixer.lambda$32() - INFO: Main mixer started scenario Scenario
2018-04-23 14:41:59 [Main Mixer Worker] ImmerseMixer.lambda$32() - INFO: Main mixer restarted scenario Scenario
2018-04-23 14:41:59 [Main Mixer Worker] ImmerseMixer.lambda$32() - INFO: Main mixer started scenario Scenario
2018-04-23 14:41:59 [Main Mixer Worker] ImmerseMixer.lambda$32() - INFO: Main mixer restarted scenario Scenario
2018-04-23 14:41:59 [Main Mixer Worker] ImmerseMixer.lambda$32() - INFO: Main mixer started scenario Scenario

[ewjmulder]

FixedAudioResource just returns the same AudioInputStream object, that does not work for restarting!

[ewjmulder]

Fixed by refactoring FixedAudioResource into SuppliedAudioResource that uses a Supplier instead.