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check for unconfigured vloopback device (no width,height values setup)

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niels
2012-12-30 12:41:19 +01:00
parent 20c686851f
commit 26ce1f9138
1 changed files with 20 additions and 4 deletions
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24
veejay-current/veejay-server/libstream/vj-vloopback.c
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@@ -234,35 +234,51 @@ int vj_vloopback_start_pipe( void *vloop )
#ifdef HAVE_V4L2
struct v4l2_capability caps;
struct v4l2_format format;
struct v4l2_format format1;
memset(&caps,0,sizeof(caps));
memset(&format,0,sizeof(format));
memset(&format1,0,sizeof(format1));
int res = ioctl( v->fd, VIDIOC_QUERYCAP, &caps );
if( res < 0 ) {
veejay_msg(VEEJAY_MSG_ERROR, "Cannot query video capabilities: %s", strerror(errno));
return 0;
}
format1.type = V4L2_BUF_TYPE_VIDEO_OUTPUT;
res = ioctl( v->fd, VIDIOC_G_FMT, &format1 );
veejay_msg(VEEJAY_MSG_DEBUG, "The capture device is currently configured in %dx%d@%x",
format1.fmt.pix.width,format1.fmt.pix.height,format1.fmt.pix.pixelformat );
format.type = V4L2_BUF_TYPE_VIDEO_OUTPUT;
format.fmt.pix.width = v->width;
format.fmt.pix.height= v->height;
format.fmt.pix.pixelformat = v->palette;
// format.fmt.pix.sizeimage = v->size;
format.fmt.pix.field = V4L2_FIELD_NONE;
format.fmt.pix.bytesperline = v->width;
format.fmt.pix.colorspace = (v->jfif == 1 ? V4L2_COLORSPACE_JPEG : V4L2_COLORSPACE_SMPTE170M );
res = ioctl( v->fd, VIDIOC_S_FMT, &format );
if( res < 0 ) {
veejay_msg(VEEJAY_MSG_ERROR,"Cannot set video format (%dx%d@%x/%x): %s",
veejay_msg(VEEJAY_MSG_WARNING,"Cannot set preferred video format (%dx%d@%x/%x): %s",
v->width,v->height,v->palette,v->jfif, strerror(errno) );
}
res = ioctl( v->fd, VIDIOC_G_FMT, &format );
if( format.fmt.pix.width == 0 || format.fmt.pix.height == 0 ) {
veejay_msg(VEEJAY_MSG_ERROR, "Invalid video capture resolution %dx%d. Use v4l2loopback-ctl and setup capabilities.",
format.fmt.pix.width, format.fmt.pix.height );
return 0;
}
if( format.fmt.pix.pixelformat != v->palette ||
format.fmt.pix.width != v->width || format.fmt.pix.height != v->height ) {
res = ioctl( v->fd, VIDIOC_G_FMT, &format );
int cap_palette = v4l2_pixelformat2ffmpeg( format.fmt.pix.pixelformat );
int src_palette = v4l2_pixelformat2ffmpeg( v->palette );