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LPC: Linux audio: it's a messLPC: Linux audio: it's a messPosted Sep 22, 2008 10:26 UTC (Mon) by alankila (subscriber, #47141)Parent article: LPC: Linux audio: it's a mess
One thing missing from this discussion is a piece of gratitude: I think Pulseaudio at least is on the right track in that it makes it simple to produce output.
With ALSA, you write this 100+ lines long method with about a dozen calls, each which can fail, some which are necessary before other calls in the sequence will work. It is strangely low level, maddeningly flexible, and poorly documented, so it's very difficult to know what you should do.
At least these questions may arise: What is the sufficient condition to get the output mode that is exact to the spec that you requested? Are there format conversions or resampling in the output path? If resampling, where do I set a reasonable algorithm, as pick-nearest or linear interpolation is not acceptable for audio work? What is the minimal program that produces output and yet has some specified latency? How do you write a working full duplex program?
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