int set_cap_param_v4l2(struct video_device *vdev, int *palettes, int nb) {
struct capture_device *c = vdev->capture;
int ret = 0;
int def[NB_SUPPORTED_PALETTE] = DEFAULT_PALETTE_ORDER;
dprint(LIBVIDEO_SOURCE_CAP, LIBVIDEO_LOG_DEBUG,
"CAP: Setting capture parameters on device %s.\n", vdev->file);
if(nb<0 || nb>=NB_SUPPORTED_PALETTE) {
dprint(LIBVIDEO_SOURCE_CAP, LIBVIDEO_LOG_ERR,
"CAP: Incorrect number of palettes (%d)\n", nb);
return LIBVIDEO_ERR_FORMAT;
}
if(nb==0 || palettes==NULL) {
dprint(LIBVIDEO_SOURCE_CAP, LIBVIDEO_LOG_DEBUG,
"CAP: No palettes supplied, trying default order.\n");
palettes = def;
nb = NB_SUPPORTED_PALETTE;
}
//set desired standard
if (set_std(c, vdev->fd) !=0 ) {
ret = LIBVIDEO_ERR_STD;
goto fail;
}
//set desired input
if (set_input(c, vdev->fd) != 0) {
ret = LIBVIDEO_ERR_CHANNEL;
goto fail;
}
//Set image format
if (set_image_format(c, palettes, nb, vdev->fd) != 0) {
ret = LIBVIDEO_ERR_FORMAT;
goto fail;
}
//Set crop format
if (set_crop(c, vdev->fd) != 0) {
info("Listing the reported capabilities:\n");
ret = LIBVIDEO_ERR_CROP;
goto fail;
}
//set FPS
set_param(c, vdev->fd);
return ret;
fail:
info("Listing the reported capabilities:\n");
list_cap_v4l2(vdev->fd);
return ret;
}
/* open Video4Linux2 device and try to set up certain parameters */
MjpegCamera::MjpegCamera(const char *device) {
buffers = NULL;
n_buffers = 0;
fd = open(device, O_RDWR);
if (fd == -1) {
throw POSIXError("open v4l device");
}
set_image_format( );
set_frame_rate( );
map_frame_buffers( );
queue_all_buffers( );
}
/* open Video4Linux2 device and try to set up certain parameters */
V4L2UpscaledInputAdapter::V4L2UpscaledInputAdapter(const char *device)
: out_pipe(256) {
buffers = NULL;
n_buffers = 0;
fd = open(device, O_RDWR);
if (fd == -1) {
throw POSIXError("open v4l device");
}
set_image_format( );
map_frame_buffers( );
queue_all_buffers( );
stream_on( );
start_thread( );
}
