From: James Hilliard <[email protected]> Patch adapted from https://bugs.archlinux.org/task/44091
Signed-off-by: James Hilliard <[email protected]> --- zbar/video/v4l2.c | 17 +++++++++++++++++ 1 file changed, 17 insertions(+) diff --git a/zbar/video/v4l2.c b/zbar/video/v4l2.c index ad6adf4..ca52e4c 100644 --- a/zbar/video/v4l2.c +++ b/zbar/video/v4l2.c @@ -243,6 +243,21 @@ static int v4l2_mmap_buffers (zbar_video_t *vdo) return(0); } +static int v4l2_request_buffers (zbar_video_t *vdo) +{ + struct v4l2_requestbuffers rb; + memset(&rb, 0, sizeof(rb)); + rb.count = vdo->num_images; + rb.type = V4L2_BUF_TYPE_VIDEO_CAPTURE; + rb.memory = V4L2_MEMORY_USERPTR; + if(v4l2_ioctl(vdo->fd, VIDIOC_REQBUFS, &rb) < 0) + return(err_capture(vdo, SEV_ERROR, ZBAR_ERR_SYSTEM, __func__, + "requesting video frame buffers (VIDIOC_REQBUFS)")); + if(rb.count) + vdo->num_images = rb.count; + return(0); +} + static int v4l2_set_format (zbar_video_t *vdo, uint32_t fmt) { @@ -334,6 +349,8 @@ static int v4l2_init (zbar_video_t *vdo, if(vdo->iomode == VIDEO_MMAP) return(v4l2_mmap_buffers(vdo)); + if(vdo->iomode == VIDEO_USERPTR) + return(v4l2_request_buffers(vdo)); return(0); } -- 2.7.4
