Arve Knudsen wrote:Ok, obviously there's something I don't understand (no surprise). I did a little test where I set start threshold to buffer size, acquire memory using snd_pcm_mmap_begin (number of returned frames equals buffer size), fill the buffer and do a snd_pcm_mmap_commit. After the commit I check the state of the card, which is SND_PCM_STATE_PREPARED (a started pcm would be in the running state?). Or do you mean actual transfer of data, by start of stream?What's the purpose of set_start_threshold?
The stream will automatically start when the buffer has been filled up to the amount specified by start_threshold.
Back to my original goal: I did an explicit start of the pcm after filling the buffer, but the output still sounds muted for some reason. If I start the pcm *before* writing to the buffer however (like I normally would), the output is like expected. Any idea what causes this initial muting of the output?
Thanks
Arve Knudsen
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