5 commits

Author	SHA1	Message	Date
Arun Raghavan	c36ab6896f	echo-cancel: Mark immutable parameters as const in vfunc ... Marks the recording and playback streams as const in the pa_echo_canceller->run method for clarity.	2010-09-07 15:12:12 +05:30
Arun Raghavan	948a3d042c	echo-cancel: Make blocksize a module-wide parameter ... Since all algorithms will need to specify a block size (the amount of data to be processed together), we make this a common parameter and have the implementation set it at initialisation time.	2010-09-07 15:12:12 +05:30
Arun Raghavan	126e1336b2	echo-cancel: Let AEC module determine source/sink spec ... Since the source and sink specification will need to be determined by the AEC algorithm (can it handle multi-channel audio, does it work with a fixed sample rate, etc.), we negotiate these using inout parameters at initialisation time. There is opportunity to make the sink-handling more elegant. Since the sink data isn't used for playback (just processing), we could pass through the data as-is and resample to the required spec before using in the cancellation algorithm. This isn't too important immediately, but would be nice to have.	2010-09-07 15:12:12 +05:30
Arun Raghavan	21001f49a4	echo-cancel: Pass arguments to the specific canceller module ... This allows us to tweak module parameters for whichever AEC module is chosen.	2010-09-07 15:12:12 +05:30
Arun Raghavan	e7177680d1	echo-cancel: Split out speex code from the core module ... This splits out the echo-cancelling core from the PA-specific bits to allow us to plug in other echo-cancellation engines.	2010-09-07 15:12:12 +05:30