Hi All,
I'm looking into resampling of audio and have few questions. Can somebody
help me in understanding what are the capabilities of the Helix audio
resampling ?
Will audio system resample based on device's capabilities ?
For E.g.. If a clip's sampling rate is 32KHz and if device does not support
32KHz, will the samples be resampled ?
I noticed an array z_anValidSampleRates in hxaudsess.cpp. Are these the
sampling rates supported ? I tried removing a sampling rate from this array and
tried to play a clip of the same removed sampling rate, expecting the audio
device to be opened on resampled rate, but audio device was opened on the
clip's sample rate.
And also the code on CHXAudioSession::GetDeviceFormat() (hxaudsess.cpp) creates
a table of supported combination of sample rates and channels for the device.
The tables first entry is always the clips exact properties except when
"AudioDeviceSamplesPerSec" is added to the config file. When
"AudioDeviceSamplesPerSec" is set on config file, the audio device is opened
for the specified sampling rate rather than the clip's sampling rate.
Where does the audio session check against the audio device properties
(channels, sample rate) ?
(Is there some validation done for mono, stereo property of the audio device
and appropriate conversion ?)
Thanks,
Rajesh.
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