[Pkg-spca5xx-devel] REG :: Improving the spca561A driver

Satheesh Kumar M satheeshm at tataelxsi.co.in
Thu Apr 26 14:16:07 UTC 2007



> Hi Everyone,
>    All these days i have been developing the driver of SPCA561A (LOGITECH
QUICKCAM EXPRESS Etch2) whose VENDOR ID :: 0x046D and PRODUCT ID :: 0x0928
>
>    The current code base version that i have is
>                spca5xx 20060501
> In this module i can GET ONLY 7 FPS as an output is there any way by wbich
i can get the FPS BETWEEN (25 - 30)???
>
>    I even tried the MBUF method of grabbing the frame but it seems we have
got only 2 such buffers but after seing the code i tried changing the number
of MMAP buffer which is given in SPCA5xx.h
>
>    #define SPCA50X_NUMFRAMES 2
>    #define SPCA50X_NUMSBUF 2
>
>    This i have changed it to
>
>    #define SPCA50X_NUMFRAMES 32
>    #define SPCA50X_NUMSBUF 32
>
>
>    This change is terribly fast but the system seems to crash but the
frame rate is amazingly higher, is this change advisable???? Please suggest
me a way to solve this problem where i have been breaking my head all these
days.
>      The same camera is giving me 30 fps even at 352x288 resolution in
WINDOWS using PortVideoSDL 0.3.
>
> With Regards,
> Satheesh Kumar .M.
>
>




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