Dne 21. 01. 19 v 18:46 Chakravarthi Pradeep napsal(a):
On Wed, Jan 16, 2019 at 5:07 PM Chakravarthi Pradeep <doubleq7@xxxxxxxxx> wrote:
I have ALSA driver for capture device which works fine with VLC. when
I try to capture and render using own application having some issues.
When I start play, it has some noise in beginning and audio is
discontinuous in between. Discontinuous means, some audio frame are
getting dropped in between. cut cut sound for sine wave. I have tried
snd_pcm_drop and snd_pcm_drain but no use. Kindly suggest how to
remove the starting noise in ALSA.
I have experienced the same issue, with ice172 driver. IMO part of the
first period when opening the stream contains samples from the previous
run. In one of my my projects I have to drop initial samples in order to
get correct and stable results from FFT analysis.
I do not know if the problem is in the driver, alsa-lib or if the
application (in my case the SDL library) uses alsa-lib API incorrectly.
To tell the truth I did not investigate details and "fixed" it by
dropping the initial samples.
Best regards,
Pavel.
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