Hi, Our jack OSS (or Boomer) driver uses a 2 threads model (one used for reading and one used for writing). In duplex mode, we typically open the input and output devices separately, then use blocking "read" on input side and blocking "write" on output side. Both threads are synched using semaphores so that we know when to trigger a "server cycle", that is when input have been read and ouput have been written.
In some cases and some hardware (like RME MADI card), it seems record in not correctly started and the input stream shows some missing frames (like 128 frames of 0 value) or duplicated frames (like 128 frames repeated twice.) It seems that the SNDCTL_DSP_SETTRIGGER ioctl (http:// manuals.opensound.com/developer/SNDCTL_DSP_SETTRIGGER.html) should be used for that. Is it still the case with OSS 4.0? Are the following code example still correct? http://manuals.opensound.com/developer/fulldup.c.html#LOC79 http://manuals.opensound.com/developer/iosync.c.html#LOC16 Any advice how to use SNDCTL_DSP_SETTRIGGER correctly? Thanks Stephane letz _______________________________________________ oss-devel mailing list oss-devel@mailman.opensound.com http://mailman.opensound.com/mailman/listinfo/oss-devel
