[Xvid-devel] bgr_to_yv12_mmx access violation for BGR 1280*1024 image. Is that just me?

[Erwin Bellon]

Dear Xvid team,

I wrapped your fine encoder in a DirectShow filter and use that to capture real-time video. That filter works for most image resolutions but for
1280 * 1024 RGB 24bit output from a webcam I get a read access violation. Did I supply wrong values or might this conversion be suspect? Interestingly, the memory location that the code tries to read is just beyond the memory for the image frame.

I include the code that calls the assembler routine below, with the parameter values included between ().

case XVID_CSP_BGR:
	safe_packed_conv(
		src[0],   		(0x26ac0000, and when added 1280*1024*3
					 -> address at which access violation occurs)
		src_stride[0],	(3840, is a multiple of 4)
		image->y,		(I assume that is an output buffer)
		image->u,
		image->v,
		edged_width,	(1408)
		edged_width2,	(704)
		width,		(1280)
		height,		(1024)
		(csp & XVID_CSP_VFLIP),		(csp = 80000200
						 	 = XVID_CSP_BGR | XVID_CSP_VFLIP)

		interlacing?bgri_to_yv12  :bgr_to_yv12,	(interlacing = 0)
		interlacing?bgri_to_yv12_c:bgr_to_yv12_c, 3, interlacing);

Any hint would be appreciated. I will in the mean time try to test some more.

Regards,

Erwin Bellon