audio: fix 48 kHz bug on NTSC consoles and missing static variable initialization #412
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This commit fixes 48 kHz playback on NTSC consoles. Previously
samplesize <= dacrate / 66requirement was not met causing playback to be slower than expected.playing_queueis now reinitialized whenaudio_initis called again. This caused corrupted playback whenaudio_initneeded to be called after first audio initialization (e.g. to change frequency or number of buffers).Some AI registers are now cleared to stop audio playback correctly thus eliminating any undesired clicks and pops.