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alsa-backend: initialize variable "sub unit dir". This variable is passed into alsa as a pointer. Alsa will write to it but also read (!) from it. So the read will give undesired behavior when variable is not initialized. Depending on current alsa-config/hardware it leads to an error "Invalid argument" when submitting the parameters by invoking "snd_pcm_hw_params" a few lines later. 

Initializing the variable to -1 fixes it and means "set to exact value or less" (http://alsa.opensrc.org/HowTo_Asynchronous_Playback)
This commit is contained in:
verybadsoldier 2016-10-18 22:09:00 +02:00
parent d8a7212d69
commit 7d49b2212d
1 changed files with 1 additions and 1 deletions
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2
core/oslib/audiobackend_alsa.cpp
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@ -13,7 +13,7 @@ static void alsa_init()
snd_pcm_hw_params_t *params;
unsigned int val;
int dir;
int dir=-1;
snd_pcm_uframes_t frames;
/* Open PCM device for playback. */