On Thu, May 02, 2024 at 10:26:43AM +0100, Mauro Carvalho Chehab wrote: > Mauro Carvalho Chehab <mchehab@xxxxxxxxxx> escreveu: > > There are still time control associated with it, as audio and video > > needs to be in sync. This is done by controlling the buffers size > > and could be fine-tuned by checking when the buffer transfer is done. ... > Just complementing: on media, we do this per video buffer (or > per half video buffer). A typical use case on cameras is to have > buffers transferred 30 times per second, if the video was streamed > at 30 frames per second. IIRC some big use case for this hardware was transcoding so there was a desire to just go at whatever rate the hardware could support as there is no interactive user consuming the output as it is generated. > I would assume that, on an audio/video stream, the audio data > transfer will be programmed to also happen on a regular interval. With audio the API is very much "wake userspace every Xms".
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