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rebuilt with libpoppler 0.24.5 [release 3.5.0-2mamba;Mon Mar 03 2014]

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This commit is contained in:
Silvan Calarco 2024-01-05 22:36:57 +01:00
parent bb9bb9d25f
commit 7c194d4e3e
3 changed files with 2316 additions and 0 deletions
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3
README.md
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@ -1,2 +1,5 @@
# gambas3 # gambas3
Gambas is a free development environment based on a Basic interpreter with object extensions, like Visual Basic(tm) (but it is NOT a clone!).
With Gambas, you can quickly design your program GUI, access MySQL or PostgreSQL databases, control KDE applications with DCOP, translate your program into many languages, create network applications easily, build RPMs of your apps automatically, and so on...

883
gambas2-2.10.0-v4l2.patch Normal file
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@ -0,0 +1,883 @@
diff -Nru gambas2-2.10.0.orig/gb.v4l/src/CWebcam.c gambas2-2.10.0/gb.v4l/src/CWebcam.c
--- gambas2-2.10.0.orig/gb.v4l/src/CWebcam.c 2008-12-29 14:16:29.000000000 +0100
+++ gambas2-2.10.0/gb.v4l/src/CWebcam.c 2009-02-20 03:26:27.000000000 +0100
@@ -90,6 +90,15 @@
/***********************************************************************************
+ V4l2 interface
+
+************************************************************************************/
+
+#include "video_device2.c"
+
+
+/***********************************************************************************
+
Camera setup
************************************************************************************/
@@ -426,7 +435,11 @@
char *buf;
int w,h;
- buf=(char*)vd_get_image(DEVICE);
+ if (DEVICE->v4l_version == 2)
+ buf=(char*)vd_get_image2(DEVICE);
+ else
+ buf=(char*)vd_get_image(DEVICE);
+
if (!buf) return -1;
w=DEVICE->vmmap.width;
h=DEVICE->vmmap.height;
@@ -638,28 +651,39 @@
struct video_tuner vtuner;
VIDEO_STREAM *str;
- mydev=open (GB.FileName(STRING(Device),LENGTH(Device)),O_RDWR);
+ mydev=open (GB.FileName(STRING(Device),LENGTH(Device)),O_RDWR | O_NONBLOCK, 0);
if (mydev==-1)
{
GB.Error("Unable to open device");
return;
}
+
DEVICE=vd_setup(DEF_WIDTH,DEF_HEIGHT,DEF_DEPTH,mydev);
- if (!vd_setup_capture_mode(DEVICE))
+ if (!init_device2(DEVICE) )
{
- close(mydev);
- GB.Free(POINTER(&DEVICE));
- GB.Error("Unable to setup capture mode");
- return;
+ DEVICE->v4l_version=2;
+ vd_get_capabilities(DEVICE);
+ start_capturing (mydev);
}
+ else
+ {
+ DEVICE->v4l_version=1;
+ if (!vd_setup_capture_mode(DEVICE))
+ {
+ close(mydev);
+ GB.Free(POINTER(&DEVICE));
+ GB.Error("Unable to setup capture mode");
+ return;
+ }
- vd_setup_video_source(DEVICE,IN_DEFAULT,NORM_DEFAULT);
+ vd_setup_video_source(DEVICE,IN_DEFAULT,NORM_DEFAULT);
+ if (vd_ioctl (DEVICE, VIDIOCGTUNER, &vtuner)) DEVICE->Freq2=1;
+
+ }
GB.Alloc(POINTER(&THIS->device),sizeof(char)*(LENGTH(Device)+1));
strcpy(THIS->device,STRING(Device));
- if (vd_ioctl (DEVICE, VIDIOCGTUNER, &vtuner)) DEVICE->Freq2=1;
-
THIS->stream.desc=&VideoStream;
str=(VIDEO_STREAM*)POINTER(&THIS->stream);
str->handle=(void*)THIS;
@@ -673,6 +697,10 @@
if (DEVICE)
{
+ if (DEVICE->v4l_version == 2) {
+ stop_capturing(DEVICE->dev);
+ uninit_device2();
+ }
vd_close(DEVICE);
GB.Free(POINTER(&DEVICE));
}
@@ -707,27 +735,40 @@
whiteness=DEVICE->videopict.whiteness;
if (THIS->membuf) GB.Free(POINTER(&THIS->membuf));
+ stop_capturing (DEVICE->dev);
+ uninit_device2();
+ close(DEVICE->dev);
vd_close(DEVICE);
GB.Free(POINTER(&DEVICE));
- mydev=open(THIS->device,O_RDWR);
+ mydev=open(THIS->device,O_RDWR | O_NONBLOCK,0 );
if (mydev==-1)
{
GB.Error("Unable to open device");
return;
}
+
DEVICE=vd_setup(w,h,DEF_DEPTH,mydev);
- if (!vd_setup_capture_mode(DEVICE))
+ if (!init_device2(DEVICE) )
{
- close(mydev);
- GB.Free(POINTER(&DEVICE));
- GB.Error("Unable to setup capture mode");
- return;
+ DEVICE->v4l_version=2;
+ vd_get_capabilities(DEVICE);
+ start_capturing (mydev);
+ }
+ else
+ {
+ DEVICE->v4l_version=1;
+ if (!vd_setup_capture_mode(DEVICE))
+ {
+ close(mydev);
+ GB.Free(POINTER(&DEVICE));
+ GB.Error("Unable to setup capture mode");
+ return;
+ }
+
+ vd_setup_video_source(DEVICE,channel,norm);
}
-
- vd_setup_video_source(DEVICE,channel,norm);
-
DEVICE->videopict.hue=hue;
DEVICE->videopict.contrast=contrast;
DEVICE->videopict.brightness=brightness;
@@ -795,7 +836,12 @@
char *buf;
int w,h;
- buf=(char*)vd_get_image(DEVICE);
+ if (DEVICE->v4l_version == 2)
+ {
+ buf=(char*)vd_get_image2(DEVICE);
+ } else {
+ buf=(char*)vd_get_image(DEVICE);
+ }
if (!buf)
{
GB.Error("Unable to get image");
@@ -819,7 +865,11 @@
char *buf;
int w,h;
- buf=(char*)vd_get_image(DEVICE);
+ if (DEVICE->v4l_version == 2)
+ buf=(char*)vd_get_image2(DEVICE);
+ else
+ buf=(char*)vd_get_image(DEVICE);
+
if (!buf)
{
GB.Error("Unable to get image");
@@ -827,8 +877,8 @@
return;
}
- w=DEVICE->vmmap.width;
- h=DEVICE->vmmap.height;
+ w=DEVICE->width;
+ h=DEVICE->height;
vd_image_done(DEVICE);
GB.Picture.Create(&ret,(void*)buf,w,h,GB_IMAGE_BGR);
@@ -902,7 +952,12 @@
GB.Error("Unable to open file for writting");
return;
}
- buf=(char*)vd_get_image(DEVICE);
+ if (DEVICE->v4l_version == 2) {
+ buf=(char*)vd_get_image2(DEVICE);
+ } else {
+ buf=(char*)vd_get_image(DEVICE);
+ }
+
if (!buf)
{
fclose(fd);
@@ -910,8 +965,8 @@
return;
}
- w=DEVICE->vmmap.width;
- h=DEVICE->vmmap.height;
+ w=DEVICE->width;
+ h=DEVICE->height;
switch(format)
{
diff -Nru gambas2-2.10.0.orig/gb.v4l/src/CWebcam.h gambas2-2.10.0/gb.v4l/src/CWebcam.h
--- gambas2-2.10.0.orig/gb.v4l/src/CWebcam.h 2008-12-29 14:16:29.000000000 +0100
+++ gambas2-2.10.0/gb.v4l/src/CWebcam.h 2009-02-20 03:03:27.000000000 +0100
@@ -72,6 +73,7 @@
unsigned char *frame_buffer; // not the video memory, but one image
int dev; // fd of the physical device
int Freq2;
+ int v4l_version;
} video_device_t;
diff -Nru gambas2-2.10.0.orig/gb.v4l/src/video_device2.c gambas2-2.10.0/gb.v4l/src/video_device2.c
--- gambas2-2.10.0.orig/gb.v4l/src/video_device2.c 1970-01-01 01:00:00.000000000 +0100
+++ gambas2-2.10.0/gb.v4l/src/video_device2.c 2009-02-20 03:40:19.000000000 +0100
@@ -0,0 +1,663 @@
+/*
+ * V4L2 video capture example
+ *
+ * This program can be used and distributed without restrictions.
+ */
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <assert.h>
+
+#include <getopt.h> /* getopt_long() */
+
+#include <fcntl.h> /* low-level i/o */
+#include <unistd.h>
+#include <errno.h>
+#include <malloc.h>
+#include <sys/stat.h>
+#include <sys/types.h>
+#include <sys/time.h>
+#include <sys/mman.h>
+#include <sys/ioctl.h>
+
+#include <asm/types.h> /* for videodev2.h */
+
+#include <linux/videodev2.h>
+#include <libv4lconvert.h>
+
+#define MEMCLEAR(x) memset (&(x), 0, sizeof (x))
+
+typedef enum {
+ IO_METHOD_READ,
+ IO_METHOD_MMAP,
+ IO_METHOD_USERPTR,
+} io_method;
+
+struct buffer {
+ void * start;
+ size_t length;
+};
+
+static io_method io = IO_METHOD_MMAP;
+struct buffer * buffers = NULL;
+unsigned char * bufferRGB = NULL;
+static unsigned int n_buffers = 0;
+
+#define CLIP(color) (unsigned char)(((color)>0xFF)?0xff:(((color)<0)?0:(color)))
+
+void v4lconvert_yuyv_to_bgr24(const unsigned char *src, unsigned char *dest,
+ int width, int height)
+{
+ int j;
+
+ while (--height >= 0) {
+ for (j = 0; j < width; j += 2) {
+ int u = src[1];
+ int v = src[3];
+ int u1 = (((u - 128) << 7) + (u - 128)) >> 6;
+ int rg = (((u - 128) << 1) + (u - 128) +
+ ((v - 128) << 2) + ((v - 128) << 1)) >> 3;
+ int v1 = (((v - 128) << 1) + (v - 128)) >> 1;
+
+ *dest++ = CLIP(src[0] + u1);
+ *dest++ = CLIP(src[0] - rg);
+ *dest++ = CLIP(src[0] + v1);
+
+ *dest++ = CLIP(src[2] + u1);
+ *dest++ = CLIP(src[2] - rg);
+ *dest++ = CLIP(src[2] + v1);
+ src += 4;
+ }
+ }
+}
+
+
+
+void v4lconvert_yuyv_to_rgb24(const unsigned char *src, unsigned char *dest,
+ int width, int height)
+{
+ int j;
+
+ while (--height >= 0) {
+ for (j = 0; j < width; j += 2) {
+ int u = src[1];
+ int v = src[3];
+ int u1 = (((u - 128) << 7) + (u - 128)) >> 6;
+ int rg = (((u - 128) << 1) + (u - 128) +
+ ((v - 128) << 2) + ((v - 128) << 1)) >> 3;
+ int v1 = (((v - 128) << 1) + (v - 128)) >> 1;
+
+ *dest++ = CLIP(src[0] + v1);
+ *dest++ = CLIP(src[0] - rg);
+ *dest++ = CLIP(src[0] + u1);
+
+ *dest++ = CLIP(src[2] + v1);
+ *dest++ = CLIP(src[2] - rg);
+ *dest++ = CLIP(src[2] + u1);
+ src += 4;
+ }
+ }
+}
+
+int convert_yuv_to_rgb_pixel(int y, int u, int v)
+{
+ unsigned int pixel32 = 0;
+ unsigned char *pixel = (unsigned char *)&pixel32;
+ int r, g, b;
+
+ r = y + (1.370705 * (v-128));
+ g = y - (0.698001 * (v-128)) - (0.337633 * (u-128));
+ b = y + (1.732446 * (u-128));
+
+ if(r > 255) r = 255;
+ if(g > 255) g = 255;
+ if(b > 255) b = 255;
+ if(r < 0) r = 0;
+ if(g < 0) g = 0;
+ if(b < 0) b = 0;
+
+ pixel[0] = r * 220 / 256;
+ pixel[1] = g * 220 / 256;
+ pixel[2] = b * 220 / 256;
+
+ return pixel32;
+}
+
+int convert_yuv_to_rgb_buffer(const unsigned char *yuv, unsigned char *rgb, unsigned int width, unsigned int height)
+{
+ unsigned int in, out = 0;
+ unsigned int pixel_16;
+ unsigned char pixel_24[3];
+ unsigned int pixel32;
+ int y0, u, y1, v;
+
+ for(in = 0; in < width * height * 2; in += 4) {
+ pixel_16 =
+ yuv[in + 3] << 24 |
+ yuv[in + 2] << 16 |
+ yuv[in + 1] << 8 |
+ yuv[in + 0];
+
+ y0 = (pixel_16 & 0x000000ff);
+ u = (pixel_16 & 0x0000ff00) >> 8;
+ y1 = (pixel_16 & 0x00ff0000) >> 16;
+ v = (pixel_16 & 0xff000000) >> 24;
+
+ pixel32 = convert_yuv_to_rgb_pixel(y0, u, v);
+ pixel_24[0] = (pixel32 & 0x000000ff);
+ pixel_24[1] = (pixel32 & 0x0000ff00) >> 8;
+ pixel_24[2] = (pixel32 & 0x00ff0000) >> 16;
+
+ rgb[out++] = pixel_24[0];
+ rgb[out++] = pixel_24[1];
+ rgb[out++] = pixel_24[2];
+
+ pixel32 = convert_yuv_to_rgb_pixel(y1, u, v);
+ pixel_24[0] = (pixel32 & 0x000000ff);
+ pixel_24[1] = (pixel32 & 0x0000ff00) >> 8;
+ pixel_24[2] = (pixel32 & 0x00ff0000) >> 16;
+
+ rgb[out++] = pixel_24[0];
+ rgb[out++] = pixel_24[1];
+ rgb[out++] = pixel_24[2];
+ }
+
+ return 0;
+}
+
+static void
+errno_exit (const char * s)
+{
+ fprintf (stderr, "%s error %d, %s\n",
+ s, errno, strerror (errno));
+
+ exit (EXIT_FAILURE);
+}
+
+static int
+xioctl (int fd,
+ int request,
+ void * arg)
+{
+ int r;
+
+ do r = ioctl (fd, request, arg);
+ while (-1 == r && EINTR == errno);
+
+ return r;
+}
+
+static void
+process_image (int width, int height, const void *p)
+{
+ if(bufferRGB == NULL)
+ return;
+
+ v4lconvert_yuyv_to_bgr24(p, bufferRGB, width, height);
+}
+
+static int
+read_frame (int width, int height, int fd)
+{
+ struct v4l2_buffer buf;
+ unsigned int i;
+
+ switch (io) {
+ case IO_METHOD_READ:
+ if (-1 == read (fd, buffers[0].start, buffers[0].length)) {
+ switch (errno) {
+ case EAGAIN:
+ return 0;
+
+ case EIO:
+ /* Could ignore EIO, see spec. */
+
+ /* fall through */
+
+ default:
+ errno_exit ("read");
+ }
+ }
+
+ process_image (width, height, buffers[0].start);
+
+ break;
+
+ case IO_METHOD_MMAP:
+ MEMCLEAR (buf);
+
+ buf.type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
+ buf.memory = V4L2_MEMORY_MMAP;
+
+ if (-1 == xioctl (fd, VIDIOC_DQBUF, &buf)) {
+ switch (errno) {
+ case EAGAIN:
+ return 0;
+
+ case EIO:
+ /* Could ignore EIO, see spec. */
+
+ /* fall through */
+
+ default:
+ errno_exit ("VIDIOC_DQBUF");
+ }
+ }
+
+ assert (buf.index < n_buffers);
+
+ process_image (width, height, buffers[buf.index].start);
+
+ if (-1 == xioctl (fd, VIDIOC_QBUF, &buf))
+ errno_exit ("VIDIOC_QBUF");
+
+ break;
+
+ case IO_METHOD_USERPTR:
+ MEMCLEAR (buf);
+
+ buf.type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
+ buf.memory = V4L2_MEMORY_USERPTR;
+
+ if (-1 == xioctl (fd, VIDIOC_DQBUF, &buf)) {
+ switch (errno) {
+ case EAGAIN:
+ return 0;
+
+ case EIO:
+ /* Could ignore EIO, see spec. */
+
+ /* fall through */
+
+ default:
+ errno_exit ("VIDIOC_DQBUF");
+ }
+ }
+
+ for (i = 0; i < n_buffers; ++i)
+ if (buf.m.userptr == (unsigned long) buffers[i].start
+ && buf.length == buffers[i].length)
+ break;
+
+ assert (i < n_buffers);
+
+ process_image (width, height, (void *) buf.m.userptr);
+
+ if (-1 == xioctl (fd, VIDIOC_QBUF, &buf))
+ errno_exit ("VIDIOC_QBUF");
+
+ break;
+ }
+
+ return 1;
+}
+
+unsigned char *
+vd_get_image2 (video_device_t *vd)
+{
+ for (;;) {
+ fd_set fds;
+ struct timeval tv;
+ int r;
+
+ FD_ZERO (&fds);
+ FD_SET (vd->dev, &fds);
+
+ /* Timeout. */
+ tv.tv_sec = 2;
+ tv.tv_usec = 0;
+
+ r = select (vd->dev + 1, &fds, NULL, NULL, &tv);
+
+ if (-1 == r) {
+ if (EINTR == errno)
+ continue;
+
+ errno_exit ("select");
+ }
+
+ if (0 == r) {
+ fprintf (stderr, "select timeout\n");
+ exit (EXIT_FAILURE);
+ }
+ if (read_frame (vd->width, vd->height, vd->dev))
+ return bufferRGB;
+
+ /* EAGAIN - continue select loop. */
+ }
+ return NULL;
+}
+
+static void
+stop_capturing (int fd)
+{
+ enum v4l2_buf_type type;
+
+ switch (io) {
+ case IO_METHOD_READ:
+ /* Nothing to do. */
+ break;
+
+ case IO_METHOD_MMAP:
+ case IO_METHOD_USERPTR:
+ type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
+
+ if (-1 == xioctl (fd, VIDIOC_STREAMOFF, &type))
+ errno_exit ("VIDIOC_STREAMOFF");
+
+ break;
+ }
+}
+
+static void
+start_capturing (int fd)
+{
+ unsigned int i;
+ enum v4l2_buf_type type;
+
+ switch (io) {
+ case IO_METHOD_READ:
+ /* Nothing to do. */
+ break;
+
+ case IO_METHOD_MMAP:
+ for (i = 0; i < n_buffers; ++i) {
+ struct v4l2_buffer buf;
+
+ MEMCLEAR (buf);
+
+ buf.type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
+ buf.memory = V4L2_MEMORY_MMAP;
+ buf.index = i;
+
+ if (-1 == xioctl (fd, VIDIOC_QBUF, &buf))
+ errno_exit ("VIDIOC_QBUF");
+ }
+
+ type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
+
+ if (-1 == xioctl (fd, VIDIOC_STREAMON, &type))
+ errno_exit ("VIDIOC_STREAMON");
+
+ break;
+
+ case IO_METHOD_USERPTR:
+ for (i = 0; i < n_buffers; ++i) {
+ struct v4l2_buffer buf;
+
+ MEMCLEAR (buf);
+
+ buf.type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
+ buf.memory = V4L2_MEMORY_USERPTR;
+ buf.index = i;
+ buf.m.userptr = (unsigned long) buffers[i].start;
+ buf.length = buffers[i].length;
+
+ if (-1 == xioctl (fd, VIDIOC_QBUF, &buf))
+ errno_exit ("VIDIOC_QBUF");
+ }
+
+ type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
+
+ if (-1 == xioctl (fd, VIDIOC_STREAMON, &type))
+ errno_exit ("VIDIOC_STREAMON");
+
+ break;
+ }
+}
+
+static void
+uninit_device2 (void)
+{
+ unsigned int i;
+
+ switch (io) {
+ case IO_METHOD_READ:
+ free (buffers[0].start);
+ break;
+
+ case IO_METHOD_MMAP:
+ for (i = 0; i < n_buffers; ++i)
+ if (-1 == munmap (buffers[i].start, buffers[i].length))
+ return;
+ break;
+
+ case IO_METHOD_USERPTR:
+ for (i = 0; i < n_buffers; ++i)
+ free (buffers[i].start);
+ break;
+ }
+
+ free (buffers);
+ free (bufferRGB);
+}
+
+static void
+init_read (unsigned int buffer_size)
+{
+ buffers = calloc (1, sizeof (*buffers));
+
+ if (!buffers) {
+ fprintf (stderr, "Out of memory\n");
+ exit (EXIT_FAILURE);
+ }
+
+ buffers[0].length = buffer_size;
+ buffers[0].start = malloc (buffer_size);
+
+ if (!buffers[0].start) {
+ fprintf (stderr, "Out of memory\n");
+ exit (EXIT_FAILURE);
+ }
+}
+
+static void
+init_mmap (int fd)
+{
+ struct v4l2_requestbuffers req;
+
+ MEMCLEAR (req);
+
+ req.count = 4;
+ req.type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
+ req.memory = V4L2_MEMORY_MMAP;
+
+ if (-1 == xioctl (fd, VIDIOC_REQBUFS, &req)) {
+ if (EINVAL == errno) {
+ fprintf (stderr, "Device does not support "
+ "memory mapping\n");
+ exit (EXIT_FAILURE);
+ } else {
+ errno_exit ("VIDIOC_REQBUFS");
+ }
+ }
+
+ if (req.count < 2) {
+ fprintf (stderr, "Insufficient buffer memory on device\n");
+ exit (EXIT_FAILURE);
+ }
+
+ buffers = calloc (req.count, sizeof (*buffers));
+
+ if (!buffers) {
+ fprintf (stderr, "Out of memory\n");
+ exit (EXIT_FAILURE);
+ }
+
+ for (n_buffers = 0; n_buffers < req.count; ++n_buffers) {
+ struct v4l2_buffer buf;
+
+ MEMCLEAR (buf);
+
+ buf.type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
+ buf.memory = V4L2_MEMORY_MMAP;
+ buf.index = n_buffers;
+
+ if (-1 == xioctl (fd, VIDIOC_QUERYBUF, &buf))
+ errno_exit ("VIDIOC_QUERYBUF");
+
+ buffers[n_buffers].length = buf.length;
+ buffers[n_buffers].start =
+ mmap (NULL /* start anywhere */,
+ buf.length,
+ PROT_READ | PROT_WRITE /* required */,
+ MAP_SHARED /* recommended */,
+ fd, buf.m.offset);
+
+ if (MAP_FAILED == buffers[n_buffers].start)
+ errno_exit ("mmap");
+ }
+}
+
+static void
+init_userp (unsigned int buffer_size, int fd)
+{
+ struct v4l2_requestbuffers req;
+ unsigned int page_size;
+
+ page_size = getpagesize ();
+ buffer_size = (buffer_size + page_size - 1) & ~(page_size - 1);
+
+ MEMCLEAR (req);
+
+ req.count = 4;
+ req.type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
+ req.memory = V4L2_MEMORY_USERPTR;
+
+ if (-1 == xioctl (fd, VIDIOC_REQBUFS, &req)) {
+ if (EINVAL == errno) {
+ fprintf (stderr, "Device does not support "
+ "user pointer i/o\n");
+ exit (EXIT_FAILURE);
+ } else {
+ errno_exit ("VIDIOC_REQBUFS");
+ }
+ }
+
+ buffers = calloc (4, sizeof (*buffers));
+
+ if (!buffers) {
+ fprintf (stderr, "Out of memory\n");
+ exit (EXIT_FAILURE);
+ }
+
+ for (n_buffers = 0; n_buffers < 4; ++n_buffers) {
+ buffers[n_buffers].length = buffer_size;
+ buffers[n_buffers].start = memalign (/* boundary */ page_size,
+ buffer_size);
+
+ if (!buffers[n_buffers].start) {
+ fprintf (stderr, "Out of memory\n");
+ exit (EXIT_FAILURE);
+ }
+ }
+}
+
+int
+init_device2 (video_device_t *vd)
+{
+ struct v4l2_capability cap;
+ struct v4l2_cropcap cropcap;
+ struct v4l2_crop crop;
+ struct v4l2_format fmt;
+ unsigned int min;
+
+ if (-1 == xioctl (vd->dev, VIDIOC_QUERYCAP, &cap)) {
+ if (EINVAL == errno) {
+ fprintf (stderr, "Device is no V4L2 device\n");
+ return 1;
+ } else {
+ errno_exit ("VIDIOC_QUERYCAP");
+ }
+ }
+
+ if (!(cap.capabilities & V4L2_CAP_VIDEO_CAPTURE)) {
+ fprintf (stderr, "Device is no video capture device\n");
+ return 2;
+ }
+
+ switch (io) {
+ case IO_METHOD_READ:
+ if (!(cap.capabilities & V4L2_CAP_READWRITE)) {
+ fprintf (stderr, "Device does not support read i/o\n");
+ return 3;
+ }
+
+ break;
+
+ case IO_METHOD_MMAP:
+ case IO_METHOD_USERPTR:
+ if (!(cap.capabilities & V4L2_CAP_STREAMING)) {
+ fprintf (stderr, "Device does not support streaming i/o\n");
+ return 4;
+ }
+
+ break;
+ }
+
+
+ /* Select video input, video standard and tune here. */
+
+
+ MEMCLEAR (cropcap);
+
+ cropcap.type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
+
+ if (0 == xioctl (vd->dev, VIDIOC_CROPCAP, &cropcap)) {
+ crop.type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
+ crop.c = cropcap.defrect; /* reset to default */
+
+ if (-1 == xioctl (vd->dev, VIDIOC_S_CROP, &crop)) {
+ switch (errno) {
+ case EINVAL:
+ /* Cropping not supported. */
+ break;
+ default:
+ /* Errors ignored. */
+ break;
+ }
+ }
+ } else {
+ /* Errors ignored. */
+ }
+
+
+ MEMCLEAR (fmt);
+
+ fmt.type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
+ fmt.fmt.pix.width = vd->width;
+ fmt.fmt.pix.height = vd->height;
+ fmt.fmt.pix.pixelformat = V4L2_PIX_FMT_YUYV;
+ fmt.fmt.pix.field = V4L2_FIELD_INTERLACED;
+
+ if (-1 == xioctl (vd->dev, VIDIOC_S_FMT, &fmt))
+ return 1;
+
+ bufferRGB = malloc(vd->width*vd->height*vd->depth);
+ /* Note VIDIOC_S_FMT may change width and height. */
+
+ /* Buggy driver paranoia. */
+ min = fmt.fmt.pix.width * 2;
+ if (fmt.fmt.pix.bytesperline < min)
+ fmt.fmt.pix.bytesperline = min;
+ min = fmt.fmt.pix.bytesperline * fmt.fmt.pix.height;
+ if (fmt.fmt.pix.sizeimage < min)
+ fmt.fmt.pix.sizeimage = min;
+
+ switch (io) {
+ case IO_METHOD_READ:
+ init_read (fmt.fmt.pix.sizeimage);
+ break;
+
+ case IO_METHOD_MMAP:
+ init_mmap (vd->dev);
+ break;
+
+ case IO_METHOD_USERPTR:
+ init_userp (fmt.fmt.pix.sizeimage,vd->dev);
+ break;
+ }
+
+ return 0;
+}

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