some video hardware v4l is dealing with is in fact only clever DMA engine with (say) YUV data bus on one side and on board or system memory on the other side. video decoding or encoding is done by separate chip controlled typicaly by i2c bus. for such purposes there are currenly these files include/linux/video_decoder.h include/linux/video_encoder.h include/linux/sonypi.h -- SONYPI_COMMAND_* my question is: wouldn't be usefull to create only one file instead of duplicating in fact the same defines and structs under slightly different names? I don't want add just another header file into kernel. motivation: I need some interface to comunicate with IndyCam which is camera made by SGI with i2c driven picture paramaters setting (shutter, gain, red saturation...) and SGI D1 video data bus connected to VINO video capture device. VINO is able to run two independent DMA, one from IndyCam and one from SAA7191 decoder. I wrote drivers for both and now I stopped on interface between IndyCam driver and VINO driver. ladis
