mirror of https://github.com/asterisk/asterisk
to add more entries. This required moving struct grab_desc to the common header, and adding an entry in the Makefile. On passing, cleanup some comments and file headers (some are still missing). git-svn-id: https://origsvn.digium.com/svn/asterisk/trunk@95313 65c4cc65-6c06-0410-ace0-fbb531ad65f31.6.0
Luigi Rizzo
18 years ago
parent
f2702ec721
commit
d6d39dfee9
@ -0,0 +1,345 @@
|
||||
/*
|
||||
* Asterisk -- An open source telephony toolkit.
|
||||
*
|
||||
* Copyright 2007, Luigi Rizzo
|
||||
*
|
||||
* See http://www.asterisk.org for more information about
|
||||
* the Asterisk project. Please do not directly contact
|
||||
* any of the maintainers of this project for assistance;
|
||||
* the project provides a web site, mailing lists and IRC
|
||||
* channels for your use.
|
||||
*
|
||||
* This program is free software, distributed under the terms of
|
||||
* the GNU General Public License Version 2. See the LICENSE file
|
||||
* at the top of the source tree.
|
||||
*/
|
||||
|
||||
/*
|
||||
* Video grabbers used in console_video.
|
||||
*
|
||||
* $Revision$
|
||||
*
|
||||
* Each grabber is implemented through open/read/close calls,
|
||||
* plus an additional move() function used e.g. to change origin
|
||||
* for the X grabber (this may be extended in the future to support
|
||||
* more controls e.g. resolution changes etc.).
|
||||
*
|
||||
* open() should try to open and initialize the grabber, returning NULL on error.
|
||||
* On success it allocates a descriptor for its private data (including
|
||||
* a buffer for the video) and returns a pointer to the descriptor.
|
||||
* read() will return NULL on failure, or a pointer to a buffer with data
|
||||
* on success.
|
||||
* close() should release resources.
|
||||
* move() is optional.
|
||||
* For more details look at the X11 grabber below.
|
||||
*
|
||||
* NOTE: at the moment we expect uncompressed video frames in YUV format,
|
||||
* because this is what current sources supply and also is a convenient
|
||||
* format for display. It is conceivable that one might want to support
|
||||
* an already compressed stream, in which case we should redesign the
|
||||
* pipeline used for the local source, which at the moment is
|
||||
*
|
||||
* .->--[loc_dpy]
|
||||
* [src]-->--[enc_in]--+
|
||||
* `->--[enc_out]
|
||||
*/
|
||||
|
||||
#include "asterisk.h"
|
||||
#include <sys/ioctl.h>
|
||||
#include "asterisk/file.h"
|
||||
#include "asterisk/utils.h" /* ast_calloc */
|
||||
|
||||
#include "console_video.h"
|
||||
|
||||
#if defined(HAVE_VIDEO_CONSOLE)
|
||||
|
||||
#ifdef HAVE_X11
|
||||
|
||||
/* A simple X11 grabber, supporting only truecolor formats */
|
||||
|
||||
#include <X11/Xlib.h>
|
||||
|
||||
/*! \brief internal info used by the X11 grabber */
|
||||
struct grab_x11_desc {
|
||||
Display *dpy;
|
||||
XImage *image;
|
||||
int screen_width; /* width of X screen */
|
||||
int screen_height; /* height of X screen */
|
||||
struct fbuf_t b; /* geometry and pointer into the XImage */
|
||||
};
|
||||
|
||||
/*! \brief open the grabber.
|
||||
* We use the special name 'X11' to indicate this grabber.
|
||||
*/
|
||||
static void *grab_x11_open(const char *name, struct fbuf_t *geom, int fps)
|
||||
{
|
||||
XImage *im;
|
||||
int screen_num;
|
||||
struct grab_x11_desc *v;
|
||||
struct fbuf_t *b;
|
||||
|
||||
if (strcasecmp(name, "X11"))
|
||||
return NULL; /* not us */
|
||||
v = ast_calloc(1, sizeof(*v));
|
||||
if (v == NULL)
|
||||
return NULL; /* no memory */
|
||||
|
||||
/* init the connection with the X server */
|
||||
v->dpy = XOpenDisplay(NULL);
|
||||
if (v->dpy == NULL) {
|
||||
ast_log(LOG_WARNING, "error opening display\n");
|
||||
goto error;
|
||||
}
|
||||
|
||||
v->b = *geom; /* copy geometry */
|
||||
b = &v->b; /* shorthand */
|
||||
/* find width and height of the screen */
|
||||
screen_num = DefaultScreen(v->dpy);
|
||||
v->screen_width = DisplayWidth(v->dpy, screen_num);
|
||||
v->screen_height = DisplayHeight(v->dpy, screen_num);
|
||||
|
||||
v->image = im = XGetImage(v->dpy,
|
||||
RootWindow(v->dpy, DefaultScreen(v->dpy)),
|
||||
b->x, b->y, b->w, b->h, AllPlanes, ZPixmap);
|
||||
if (v->image == NULL) {
|
||||
ast_log(LOG_WARNING, "error creating Ximage\n");
|
||||
goto error;
|
||||
}
|
||||
switch (im->bits_per_pixel) {
|
||||
case 32:
|
||||
b->pix_fmt = PIX_FMT_RGBA32;
|
||||
break;
|
||||
case 16:
|
||||
b->pix_fmt = (im->green_mask == 0x7e0) ? PIX_FMT_RGB565 : PIX_FMT_RGB555;
|
||||
break;
|
||||
}
|
||||
|
||||
ast_log(LOG_NOTICE, "image: data %p %d bpp fmt %d, mask 0x%lx 0x%lx 0x%lx\n",
|
||||
im->data,
|
||||
im->bits_per_pixel,
|
||||
b->pix_fmt,
|
||||
im->red_mask, im->green_mask, im->blue_mask);
|
||||
|
||||
/* set the pointer but not the size as this is not malloc'ed */
|
||||
b->data = (uint8_t *)im->data;
|
||||
return v;
|
||||
|
||||
error:
|
||||
/* XXX maybe XDestroy (v->image) ? */
|
||||
if (v->dpy)
|
||||
XCloseDisplay(v->dpy);
|
||||
v->dpy = NULL;
|
||||
ast_free(v);
|
||||
return NULL;
|
||||
}
|
||||
|
||||
static struct fbuf_t *grab_x11_read(void *desc)
|
||||
{
|
||||
/* read frame from X11 */
|
||||
struct grab_x11_desc *v = desc;
|
||||
struct fbuf_t *b = &v->b;
|
||||
|
||||
XGetSubImage(v->dpy,
|
||||
RootWindow(v->dpy, DefaultScreen(v->dpy)),
|
||||
b->x, b->y, b->w, b->h, AllPlanes, ZPixmap, v->image, 0, 0);
|
||||
|
||||
b->data = (uint8_t *)v->image->data;
|
||||
return b;
|
||||
}
|
||||
|
||||
static int boundary_checks(int x, int limit)
|
||||
{
|
||||
return (x <= 0) ? 0 : (x > limit ? limit : x);
|
||||
}
|
||||
|
||||
/*! \brief move the origin for the grabbed area, making sure we do not
|
||||
* overflow the screen.
|
||||
*/
|
||||
static void grab_x11_move(void *desc, int dx, int dy)
|
||||
{
|
||||
struct grab_x11_desc *v = desc;
|
||||
|
||||
v->b.x = boundary_checks(v->b.x + dx, v->screen_width - v->b.w);
|
||||
v->b.y = boundary_checks(v->b.y + dy, v->screen_height - v->b.h);
|
||||
}
|
||||
|
||||
/*! \brief disconnect from the server and release memory */
|
||||
static void *grab_x11_close(void *desc)
|
||||
{
|
||||
struct grab_x11_desc *v = desc;
|
||||
|
||||
XCloseDisplay(v->dpy);
|
||||
v->dpy = NULL;
|
||||
v->image = NULL;
|
||||
ast_free(v);
|
||||
return NULL;
|
||||
}
|
||||
|
||||
static struct grab_desc grab_x11_desc = {
|
||||
.name = "X11",
|
||||
.open = grab_x11_open,
|
||||
.read = grab_x11_read,
|
||||
.move = grab_x11_move,
|
||||
.close = grab_x11_close,
|
||||
};
|
||||
#endif /* HAVE_X11 */
|
||||
|
||||
#ifdef HAVE_VIDEODEV_H
|
||||
#include <linux/videodev.h> /* Video4Linux stuff is only used in grab_v4l1_open() */
|
||||
|
||||
struct grab_v4l1_desc {
|
||||
int fd; /* device handle */
|
||||
struct fbuf_t b; /* buffer (allocated) with grabbed image */
|
||||
};
|
||||
|
||||
/*! \brief
|
||||
* Open the local video source and allocate a buffer
|
||||
* for storing the image.
|
||||
*/
|
||||
static void *grab_v4l1_open(const char *dev, struct fbuf_t *geom, int fps)
|
||||
{
|
||||
struct video_window vw = { 0 }; /* camera attributes */
|
||||
struct video_picture vp;
|
||||
int fd, i;
|
||||
struct grab_v4l1_desc *v;
|
||||
struct fbuf_t *b;
|
||||
|
||||
fd = open(dev, O_RDONLY | O_NONBLOCK);
|
||||
if (fd < 0) {
|
||||
ast_log(LOG_WARNING, "error opening camera %s\n", dev);
|
||||
return NULL;
|
||||
}
|
||||
|
||||
v = ast_calloc(1, sizeof(*v));
|
||||
if (v == NULL) {
|
||||
ast_log(LOG_WARNING, "no memory for camera %s\n", dev);
|
||||
close(fd);
|
||||
return NULL; /* no memory */
|
||||
}
|
||||
v->fd = fd;
|
||||
v->b = *geom;
|
||||
b = &v->b; /* shorthand */
|
||||
|
||||
i = fcntl(fd, F_GETFL);
|
||||
if (-1 == fcntl(fd, F_SETFL, i | O_NONBLOCK)) {
|
||||
/* non fatal, just emit a warning */
|
||||
ast_log(LOG_WARNING, "error F_SETFL for %s [%s]\n",
|
||||
dev, strerror(errno));
|
||||
}
|
||||
/* set format for the camera.
|
||||
* In principle we could retry with a different format if the
|
||||
* one we are asking for is not supported.
|
||||
*/
|
||||
vw.width = b->w;
|
||||
vw.height = b->h;
|
||||
vw.flags = fps << 16;
|
||||
if (ioctl(fd, VIDIOCSWIN, &vw) == -1) {
|
||||
ast_log(LOG_WARNING, "error setting format for %s [%s]\n",
|
||||
dev, strerror(errno));
|
||||
goto error;
|
||||
}
|
||||
if (ioctl(fd, VIDIOCGPICT, &vp) == -1) {
|
||||
ast_log(LOG_WARNING, "error reading picture info\n");
|
||||
goto error;
|
||||
}
|
||||
ast_log(LOG_WARNING,
|
||||
"contrast %d bright %d colour %d hue %d white %d palette %d\n",
|
||||
vp.contrast, vp.brightness,
|
||||
vp.colour, vp.hue,
|
||||
vp.whiteness, vp.palette);
|
||||
/* set the video format. Here again, we don't necessary have to
|
||||
* fail if the required format is not supported, but try to use
|
||||
* what the camera gives us.
|
||||
*/
|
||||
b->pix_fmt = vp.palette;
|
||||
vp.palette = VIDEO_PALETTE_YUV420P;
|
||||
if (ioctl(v->fd, VIDIOCSPICT, &vp) == -1) {
|
||||
ast_log(LOG_WARNING, "error setting palette, using %d\n",
|
||||
b->pix_fmt);
|
||||
} else
|
||||
b->pix_fmt = vp.palette;
|
||||
/* allocate the source buffer.
|
||||
* XXX, the code here only handles yuv411, for other formats
|
||||
* we need to look at pix_fmt and set size accordingly
|
||||
*/
|
||||
b->size = (b->w * b->h * 3)/2; /* yuv411 */
|
||||
ast_log(LOG_WARNING, "videodev %s opened, size %dx%d %d\n",
|
||||
dev, b->w, b->h, b->size);
|
||||
b->data = ast_calloc(1, b->size);
|
||||
if (!b->data) {
|
||||
ast_log(LOG_WARNING, "error allocating buffer %d bytes\n",
|
||||
b->size);
|
||||
goto error;
|
||||
}
|
||||
ast_log(LOG_WARNING, "success opening camera\n");
|
||||
return v;
|
||||
|
||||
error:
|
||||
close(v->fd);
|
||||
fbuf_free(b);
|
||||
ast_free(v);
|
||||
return NULL;
|
||||
}
|
||||
|
||||
/*! \brief read until error, no data or buffer full.
|
||||
* This might be blocking but no big deal since we are in the
|
||||
* display thread.
|
||||
*/
|
||||
static struct fbuf_t *grab_v4l1_read(void *desc)
|
||||
{
|
||||
struct grab_v4l1_desc *v = desc;
|
||||
struct fbuf_t *b = &v->b;
|
||||
for (;;) {
|
||||
int r, l = b->size - b->used;
|
||||
r = read(v->fd, b->data + b->used, l);
|
||||
// ast_log(LOG_WARNING, "read %d of %d bytes from webcam\n", r, l);
|
||||
if (r < 0) /* read error */
|
||||
break;
|
||||
if (r == 0) /* no data */
|
||||
break;
|
||||
b->used += r;
|
||||
if (r == l) {
|
||||
b->used = 0; /* prepare for next frame */
|
||||
return b;
|
||||
}
|
||||
}
|
||||
return NULL;
|
||||
}
|
||||
|
||||
static void *grab_v4l1_close(void *desc)
|
||||
{
|
||||
struct grab_v4l1_desc *v = desc;
|
||||
|
||||
close(v->fd);
|
||||
v->fd = -1;
|
||||
fbuf_free(&v->b);
|
||||
ast_free(v);
|
||||
return NULL;
|
||||
}
|
||||
|
||||
/*! \brief our descriptor. We don't have .move */
|
||||
static struct grab_desc grab_v4l1_desc = {
|
||||
.name = "v4l1",
|
||||
.open = grab_v4l1_open,
|
||||
.read = grab_v4l1_read,
|
||||
.close = grab_v4l1_close,
|
||||
};
|
||||
#endif /* HAVE_VIDEODEV_H */
|
||||
|
||||
/*
|
||||
* Here you can add more grabbers, e.g. V4L2, firewire,
|
||||
* a file, a still image...
|
||||
*/
|
||||
|
||||
/*! \brief The list of grabbers supported, with a NULL at the end */
|
||||
struct grab_desc *console_grabbers[] = {
|
||||
#ifdef HAVE_X11
|
||||
&grab_x11_desc,
|
||||
#endif
|
||||
#ifdef HAVE_VIDEODEV_H
|
||||
&grab_v4l1_desc,
|
||||
#endif
|
||||
NULL
|
||||
};
|
||||
|
||||
#endif /* HAVE_VIDEO_CONSOLE */
|
||||
Loading…
Reference in new issue