[mythtv] [PATCH] audiooutputalsa

David George david at thegeorges.us
Sun Aug 15 15:38:39 EDT 2004

This patch addresses a couple of issues with audiooutputalsa and has 
some cleanups and additional debugging to help anyone troubleshooting 
alsa issues on their system.

Currently if WriteAudio fails it closes pcm_handle.  This patch adds the 
ability to try to open an audio file handle again.  If the re-open fails 
it will then then return the same as it previously did.  This was 
discovered when I was troubleshooting audio problems on an HDTV stream.  
AudioOutputAlsa::Reconfigure was reworked a little to support this.

Currently if the audiolen was the same as the fragment size the audio 
thread would sit there waiting for more data.  I didn't really see the 
point in waiting so when there are 4096 bytes waiting to be sent, send it.

Currently if the audio rates don't match the logs would show mismatch 
but the second arg wasn't the mismatched rate.  This is a resend of a 
patch I sent on July 13th.

Patch to log error if snd_pcm_hw_params_malloc fails.  It stills works 
the same as it currently does, except now logs an error to notify you.

Added pcm_handle = NULL; after a snd_pcm_close(pcm_handle) in 

Remove unused variable "written" in WriteAudio.

Log warning that snd_pcm_delay return is meaningless unless alsa is in 
the running state.

Cleaned up a couple of non-4space indents.

Thats about it for this one.


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