Lennart Poettering wrote:
On Mon, 16.03.09 20:14, Magnus Hjorth ([email protected]) wrote:
Hi,
I'm trying to find a way in libpulse to query the sample format of the
default source. Passing NULL to pa_context_get_source_info_by_name does
not seem to work ("invalid argument").
Hmm, why would you want to query this? Smells like you are working on
some racy code.
I'm aware that this is racy, and a check again after recording has
started (using pa_stream_get_index and pa_context_get_source_info) is
needed to verify that that this hasn't changed.
What I'm doing is, I'm writing a PulseAudio driver for my sound file
editor, and for recording I want to do the following:
- Get a list of supported recording format(s) before recording starts.
This is what the above is for.
- Start recording with one of the supported formats. At this point, a
check that the supported format hasn't changed is made.
- Make sure as far as possible that the format corresponds to the actual
format of the input, so we're not actually recording 8 kHz mono when we
think we're recording in high quality, for example.
Try passing "@DEFAULT_SOURCE@" as sink name in
pa_context_get_source_info_by_name().
Thanks.
Best regards,
Magnus
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