Drive constantly revs up and down while reading CD data #33
Description
I'm working on a CD player program using libcdio-paranoia to read CD data and stream it to the sound card. I'm running into an issue where, for some discs only, the drive will continually oscillate between revving the disc to high speeds and spinning down, rather than spinning at a consistently low-ish speed. My drive reports that it does support setting its speed, but calls to cdio_cddap_speed_set return error code -405. I've tried adding a small sleep to my read thread (vs. reading as fast as possible until my buffer is full, then backing down) to even out the timing of the calls to cdio_paranoia_read_limited which also doesn't solve the issue. I've also tried setting retries to 0, so that reads will always be sequential.
Does anyone have insights into how to ensure the drive will run at a more constant speed?