On Tue, Nov 10, 2009 at 11:31 PM, Andy Walls <awalls@xxxxxxxxx> wrote: > OK, here's my second attempt at getting rid of cx18 YUV frame alignment > and tearing issues. > > http://linuxtv.org/hg/~awalls/cx18-yuv2 Hi Andy, I did some testing of your tree, using the following command mplayer /dev/video32 -demuxer rawvideo -rawvideo w=720:h=480:format=hm12:ntsc and then in parallel run a series of make commands of the v4l-dvb tree make -j2 && make unload && make -j2 && make unload && make -j2 && make unload && make -j2 && make unload I was definitely seeing the corruption by doing this test before your patches (both frame alignment and colorspace problems as PCI frames were being dropped). After your change, I no longer see those problems. The picture never became misaligned. However, it would appear that some sort of regression may have been introduced with the buffer handling. I was seeing a continuous reporting of the following in dmesg, even *after* I stopped generating the load by running the make commands. [ 5175.703811] cx18-0: Could not find MDL 106 for stream encoder YUV [ 5175.737380] cx18-0: Could not find MDL 111 for stream encoder YUV [ 5175.804317] cx18-0: Skipped encoder YUV, MDL 96, 3 times - it must have dropped out of rotation [ 5175.804324] cx18-0: Skipped encoder YUV, MDL 101, 3 times - it must have dropped out of rotation [ 5175.904500] cx18-0: Skipped encoder YUV, MDL 96, 2 times - it must have dropped out of rotation [ 5176.204507] cx18-0: Skipped encoder YUV, MDL 101, 1 times - it must have dropped out of rotation [ 5176.204513] cx18-0: Skipped encoder YUV, MDL 96, 1 times - it must have dropped out of rotation [ 5176.204518] cx18-0: Could not find MDL 111 for stream encoder YUV I would expect to see frame drops while the system was under high load, but I would expect that the errors would stop once the load fell back to something reasonable. However, they continue to accumulate even after the make commands stop and the only thing running on the system is mplayer (with a CPU load of around 10%). I think this tree is definitely on the right track, but it looks like some edge case has been missed. Devin -- Devin J. Heitmueller - Kernel Labs http://www.kernellabs.com -- To unsubscribe from this list: send the line "unsubscribe linux-media" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
