Commit d7894721 authored by Kwang Son's avatar Kwang Son Committed by Mauro Carvalho Chehab
Browse files

media: docs: Fix newline typo 



Fix example code which has missing or double backslash typo.

Signed-off-by: default avatarKwang Son <dev.kwang.son@gmail.com>
Signed-off-by: default avatarHans Verkuil <hverkuil-cisco@xs4all.nl>
Signed-off-by: default avatarMauro Carvalho Chehab <mchehab+huawei@kernel.org>
parent 22be5a10

Documentation/userspace-api/media/v4l/capture.c.rst

+26 −26
Original line number Diff line number Diff line
@@ -56,7 +56,7 @@ file: media/v4l/capture.c 


    static void errno_exit(const char *s)

    {

	    fprintf(stderr, "%s error %d, %s\\n", s, errno, strerror(errno));

	    fprintf(stderr, "%s error %d, %s\n", s, errno, strerror(errno));

	    exit(EXIT_FAILURE);

    }
@@ -201,7 +201,7 @@ file: media/v4l/capture.c 
			    }



			    if (0 == r) {

				    fprintf(stderr, "select timeout\\n");

				    fprintf(stderr, "select timeout\n");

				    exit(EXIT_FAILURE);

			    }
@@ -307,7 +307,7 @@ file: media/v4l/capture.c 
	    buffers = calloc(1, sizeof(*buffers));



	    if (!buffers) {

		    fprintf(stderr, "Out of memory\\n");

		    fprintf(stderr, "Out of memory\n");

		    exit(EXIT_FAILURE);

	    }
@@ -315,7 +315,7 @@ file: media/v4l/capture.c 
	    buffers[0].start = malloc(buffer_size);



	    if (!buffers[0].start) {

		    fprintf(stderr, "Out of memory\\n");

		    fprintf(stderr, "Out of memory\n");

		    exit(EXIT_FAILURE);

	    }

    }
@@ -341,7 +341,7 @@ file: media/v4l/capture.c 
	    }



	    if (req.count < 2) {

		    fprintf(stderr, "Insufficient buffer memory on %s\\n",

		    fprintf(stderr, "Insufficient buffer memory on %s\n",

			     dev_name);

		    exit(EXIT_FAILURE);

	    }
@@ -349,7 +349,7 @@ file: media/v4l/capture.c 
	    buffers = calloc(req.count, sizeof(*buffers));



	    if (!buffers) {

		    fprintf(stderr, "Out of memory\\n");

		    fprintf(stderr, "Out of memory\n");

		    exit(EXIT_FAILURE);

	    }
@@ -401,7 +401,7 @@ file: media/v4l/capture.c 
	    buffers = calloc(4, sizeof(*buffers));



	    if (!buffers) {

		    fprintf(stderr, "Out of memory\\n");

		    fprintf(stderr, "Out of memory\n");

		    exit(EXIT_FAILURE);

	    }
@@ -410,7 +410,7 @@ file: media/v4l/capture.c 
		    buffers[n_buffers].start = malloc(buffer_size);



		    if (!buffers[n_buffers].start) {

			    fprintf(stderr, "Out of memory\\n");

			    fprintf(stderr, "Out of memory\n");

			    exit(EXIT_FAILURE);

		    }

	    }
@@ -426,7 +426,7 @@ file: media/v4l/capture.c 


	    if (-1 == xioctl(fd, VIDIOC_QUERYCAP, &cap)) {

		    if (EINVAL == errno) {

			    fprintf(stderr, "%s is no V4L2 device\\n",

			    fprintf(stderr, "%s is no V4L2 device\n",

				     dev_name);

			    exit(EXIT_FAILURE);

		    } else {
@@ -435,7 +435,7 @@ file: media/v4l/capture.c 
	    }



	    if (!(cap.capabilities & V4L2_CAP_VIDEO_CAPTURE)) {

		    fprintf(stderr, "%s is no video capture device\\n",

		    fprintf(stderr, "%s is no video capture device\n",

			     dev_name);

		    exit(EXIT_FAILURE);

	    }
@@ -443,7 +443,7 @@ file: media/v4l/capture.c 
	    switch (io) {

	    case IO_METHOD_READ:

		    if (!(cap.capabilities & V4L2_CAP_READWRITE)) {

			    fprintf(stderr, "%s does not support read i/o\\n",

			    fprintf(stderr, "%s does not support read i/o\n",

				     dev_name);

			    exit(EXIT_FAILURE);

		    }
@@ -452,7 +452,7 @@ file: media/v4l/capture.c 
	    case IO_METHOD_MMAP:

	    case IO_METHOD_USERPTR:

		    if (!(cap.capabilities & V4L2_CAP_STREAMING)) {

			    fprintf(stderr, "%s does not support streaming i/o\\n",

			    fprintf(stderr, "%s does not support streaming i/o\n",

				     dev_name);

			    exit(EXIT_FAILURE);

		    }
@@ -541,7 +541,7 @@ file: media/v4l/capture.c 
	    struct stat st;



	    if (-1 == stat(dev_name, &st)) {

		    fprintf(stderr, "Cannot identify '%s': %d, %s\\n",

		    fprintf(stderr, "Cannot identify '%s': %d, %s\n",

			     dev_name, errno, strerror(errno));

		    exit(EXIT_FAILURE);

	    }
@@ -554,7 +554,7 @@ file: media/v4l/capture.c 
	    fd = open(dev_name, O_RDWR /* required */ | O_NONBLOCK, 0);



	    if (-1 == fd) {

		    fprintf(stderr, "Cannot open '%s': %d, %s\\n",

		    fprintf(stderr, "Cannot open '%s': %d, %s\n",

			     dev_name, errno, strerror(errno));

		    exit(EXIT_FAILURE);

	    }
@@ -563,17 +563,17 @@ file: media/v4l/capture.c 
    static void usage(FILE *fp, int argc, char **argv)

    {

	    fprintf(fp,

		     "Usage: %s [options]\\n\\n"

		     "Version 1.3\\n"

		     "Options:\\n"

		     "-d | --device name   Video device name [%s]n"

		     "-h | --help          Print this messagen"

		     "-m | --mmap          Use memory mapped buffers [default]n"

		     "-r | --read          Use read() callsn"

		     "-u | --userp         Use application allocated buffersn"

		     "-o | --output        Outputs stream to stdoutn"

		     "-f | --format        Force format to 640x480 YUYVn"

		     "-c | --count         Number of frames to grab [%i]n"

		     "Usage: %s [options]\n\n"

		     "Version 1.3\n"

		     "Options:\n"

		     "-d | --device name   Video device name [%s]\n"

		     "-h | --help          Print this message\n"

		     "-m | --mmap          Use memory mapped buffers [default]\n"

		     "-r | --read          Use read() calls\n"

		     "-u | --userp         Use application allocated buffers\n"

		     "-o | --output        Outputs stream to stdout\n"

		     "-f | --format        Force format to 640x480 YUYV\n"

		     "-c | --count         Number of frames to grab [%i]\n"

		     "",

		     argv[0], dev_name, frame_count);

    }
@@ -659,6 +659,6 @@ file: media/v4l/capture.c 
	    stop_capturing();

	    uninit_device();

	    close_device();

	    fprintf(stderr, "\\n");

	    fprintf(stderr, "\n");

	    return 0;

    }

Documentation/userspace-api/media/v4l/v4l2grab.c.rst

+4 −4
Original line number Diff line number Diff line
@@ -46,7 +46,7 @@ file: media/v4l/v4l2grab.c 
	    } while (r == -1 && ((errno == EINTR) || (errno == EAGAIN)));



	    if (r == -1) {

		    fprintf(stderr, "error %d, %s\\n", errno, strerror(errno));

		    fprintf(stderr, "error %d, %s\n", errno, strerror(errno));

		    exit(EXIT_FAILURE);

	    }

    }
@@ -80,11 +80,11 @@ file: media/v4l/v4l2grab.c 
	    fmt.fmt.pix.field       = V4L2_FIELD_INTERLACED;

	    xioctl(fd, VIDIOC_S_FMT, &fmt);

	    if (fmt.fmt.pix.pixelformat != V4L2_PIX_FMT_RGB24) {

		    printf("Libv4l didn't accept RGB24 format. Can't proceed.\\n");

		    printf("Libv4l didn't accept RGB24 format. Can't proceed.\n");

		    exit(EXIT_FAILURE);

	    }

	    if ((fmt.fmt.pix.width != 640) || (fmt.fmt.pix.height != 480))

		    printf("Warning: driver is sending image at %dx%d\\n",

		    printf("Warning: driver is sending image at %dx%d\n",

			    fmt.fmt.pix.width, fmt.fmt.pix.height);



	    CLEAR(req);
@@ -151,7 +151,7 @@ file: media/v4l/v4l2grab.c 
			    perror("Cannot open image");

			    exit(EXIT_FAILURE);

		    }

		    fprintf(fout, "P6\\n%d %d 255\\n",

		    fprintf(fout, "P6\n%d %d 255\n",

			    fmt.fmt.pix.width, fmt.fmt.pix.height);

		    fwrite(buffers[buf.index].start, buf.bytesused, 1, fout);

		    fclose(fout);