来源于e2e，尚未验证，备忘在这里，帖子地址：http://e2e.ti.com/support/embedded/f/354/p/41298/143924.aspx#143924

 

Here's what I did to modify the linux driver and dmai code to perform deinterlacing in single-shot mode on dm365.  Make your own copy of the Resize_config function from the dmai Resize.c code, add a deinterlace flag, and make these changes:

    BufferGfx_getDimensions(hSrcBuf, &srcDim);
    if (deinterlace) srcDim.height /= 2;
    BufferGfx_getDimensions(hDstBuf, &dstDim);

...

    /* input params are set at the resizer */
    rsz_ss_config.input.p_w_picpath_width  = srcDim.width;
    rsz_ss_config.input.p_w_picpath_height = srcDim.height;
    rsz_ss_config.input.ppln = rsz_ss_config.input.p_w_picpath_width * (deinterlace ? 2 : 1) + 8;
    rsz_ss_config.input.lpfr = rsz_ss_config.input.p_w_picpath_height + 10;
    rsz_ss_config.input.pix_fmt = pixFormatConversion(BufferGfx_getColorSpace(hSrcBuf));

This effectively halves the height and doubles the pitch of the source p_w_picpath, as illustrated above.  Then you need to modify the driver to use the ppln value in calculating the adofs param for the ipipeif.  Change the configure_resizer_in_ss_mode() function in drivers/char/dm365_ipipe.c with the following:

    ret = rsz_validate_input_p_w_picpath_format(dev,
                          ss_config->input.pix_fmt,
                          ss_config->input.ppln - 8,
                          ss_config->input.p_w_picpath_height,
                          &line_len);

Note: this is for dvsdk 2.10.  It looks like there was a ss_config->input.line_length parameter added in 3.10.