Hello Laurent,
On Sat, 29 Sep 2007 00:16:24 +0200
Laurent Pinchart <[EMAIL PROTECTED]> wrote:
> Check that the start and length parameters given to munmap() are the same as
> the mmap() return value and length parameter. What are their values ?
Bingo !
Address is identical, but size differs. May be bug of xawtv.
*** xawtv-3.95.orig/libng/plugins/drv0-v4l2.c Sat Feb 12 02:56:24 2005
--- xawtv-3.95/libng/plugins/drv0-v4l2.c Sat Sep 29 16:50:08 2007
***************
*** 768,773 ****
--- 768,774 ----
/* get it */
memset(&buf,0,sizeof(buf));
buf.type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
+ buf.memory = V4L2_MEMORY_MMAP;
if (-1 == xioctl(h->fd,VIDIOC_DQBUF,&buf, 0))
return -1;
h->waiton++;
***************
*** 865,871 ****
ng_waiton_video_buf(&h->buf_me[i]);
if (ng_debug)
print_bufinfo(&h->buf_v4l2[i]);
! if (-1 == munmap(h->buf_me[i].data,h->buf_me[i].size))
perror("munmap");
}
h->queue = 0;
--- 866,872 ----
ng_waiton_video_buf(&h->buf_me[i]);
if (ng_debug)
print_bufinfo(&h->buf_v4l2[i]);
! if (-1 == munmap(h->buf_me[i].data,h->buf_v4l2[i].length))
perror("munmap");
}
h->queue = 0;
mmap problem cleared. However still it fails at second capture.
Now it fails at select() in second capture.
I continue tracing...
Regards,
--
Hirofumi Momose <[EMAIL PROTECTED]>
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