Re: [Osalp-dev] Fwd: Asynchronous playback?

[Bruce F. <for...@tn...>]

Robert Pittana wrote:
> 
> Perhaps I am doing things incorrectly. In your example code I noticed that you just copied the config from the input to the output. If I open two inputs and use the config from the lower sampling rate input source as a parameter into the output then all inputs play at that lower rate. This is why I thought I needed to do some manual conversion.
> 

Let me explain how the config data is passed. The first time the process 
function is called a check of the audio chain is made. At the start of
the chain should be some source of audio data such as an aflibAudioFile
derived class. This sets the config data for the source. This is passed
to each member of the audio chain up the chain. A member receives an
input config data processes it and it becomes its output config data.
Its
output config data is passed to the input config of the next audio
element in the chain. When the config data reaches the mixer class it
has
a setInputConfig member function. It will set the output config data
based upon the input config data from 1 or more inputs. It is coded
to output the sample rate that is the highest amoungst the inputs. The
aflibAudio base class will automatically insert a
aflibAudioSampleRateCvt
class before any input that needs to have its sample rate converted.

For the final output class in the chain you can set its config data to
whatever
you will want. Any conversions needed to be made will be made in the
chain.
Of course you need to be carefull or all your CPU will be taken up doing
conversions. 

For the mixer class I need to look at the code in detail but it might
not
work for adding inputs dynamically. I need to work on this to make it
work.

Bruce Forsberg