Phone
/* $Id$ */
/* Copyright (c) 2012-2020 Pierre Pronchery <khorben@defora.org> */
/* This file is part of DeforaOS Desktop Phone */
/* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are
* met:
*
* 1. Redistributions of source code must retain the above copyright notice,
* this list of conditions and the following disclaimer.
*
* 2. Redistributions in binary form must reproduce the above copyright notice,
* this list of conditions and the following disclaimer in the documentation
* and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY ITS AUTHORS AND CONTRIBUTORS "AS IS" AND ANY
* EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
* DISCLAIMED. IN NO EVENT SHALL THE AUTHORS OR CONTRIBUTORS BE LIABLE FOR ANY
* DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
* ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. */
/* TODO:
* - display a window even if it was impossible to open a capture device
* - re-use code from the Camera project instead */
#include <sys/ioctl.h>
#include <sys/mman.h>
#ifdef __NetBSD__
# include <sys/videoio.h>
# include <paths.h>
#else
# include <linux/videodev2.h>
#endif
#include <fcntl.h>
#include <unistd.h>
#include <stdlib.h>
#ifdef DEBUG
# include <stdio.h>
#endif
#include <string.h>
#include <errno.h>
#include <System.h>
#include <Desktop.h>
#include "Phone.h"
/* Video */
/* private */
/* types */
typedef struct _VideoBuffer
{
void * start;
size_t length;
} VideoBuffer;
typedef struct _PhonePlugin
{
PhonePluginHelper * helper;
String * device;
gboolean hflip;
gboolean vflip;
gboolean ratio;
GdkInterpType interp;
guint source;
int fd;
struct v4l2_capability cap;
struct v4l2_format format;
/* I/O channel */
GIOChannel * channel;
/* input data */
/* XXX for mmap() */
VideoBuffer * buffers;
size_t buffers_cnt;
char * raw_buffer;
size_t raw_buffer_cnt;
/* RGB data */
unsigned char * rgb_buffer;
size_t rgb_buffer_cnt;
/* decoding */
int yuv_amp;
/* widgets */
GtkWidget * window;
#if !GTK_CHECK_VERSION(3, 0, 0)
GdkGC * gc;
#endif
GtkWidget * area;
GtkAllocation area_allocation;
GdkPixbuf * pixbuf;
#if !GTK_CHECK_VERSION(3, 0, 0)
GdkPixmap * pixmap;
#endif
} VideoPhonePlugin;
/* prototypes */
/* plug-in */
static VideoPhonePlugin * _video_init(PhonePluginHelper * helper);
static void _video_destroy(VideoPhonePlugin * video);
static void _video_settings(VideoPhonePlugin * video);
/* useful */
static int _video_ioctl(VideoPhonePlugin * video, unsigned long request,
void * data);
static void _video_start(VideoPhonePlugin * video);
static void _video_stop(VideoPhonePlugin * video);
/* callbacks */
static gboolean _video_on_can_mmap(GIOChannel * channel, GIOCondition condition,
gpointer data);
static gboolean _video_on_can_read(GIOChannel * channel, GIOCondition condition,
gpointer data);
#if GTK_CHECK_VERSION(3, 0, 0)
static gboolean _video_on_drawing_area_draw(GtkWidget * widget, cairo_t * cr,
gpointer data);
static void _video_on_drawing_area_size_allocate(GtkWidget * widget,
GdkRectangle * allocation, gpointer data);
#else
static gboolean _video_on_drawing_area_configure(GtkWidget * widget,
GdkEventConfigure * event, gpointer data);
static gboolean _video_on_drawing_area_expose(GtkWidget * widget,
GdkEventExpose * event, gpointer data);
#endif
static gboolean _video_on_open(gpointer data);
static gboolean _video_on_refresh(gpointer data);
/* constants */
#ifdef _PATH_VIDEO0
# define VIDEO_DEVICE _PATH_VIDEO0
#else
# define VIDEO_DEVICE "/dev/video0"
#endif
/* public */
/* variables */
PhonePluginDefinition plugin =
{
"Video",
"camera-video",
NULL,
_video_init,
_video_destroy,
NULL,
_video_settings
};
/* private */
/* functions */
/* video_init */
static gboolean _init_on_closex(gpointer data);
static VideoPhonePlugin * _video_init(PhonePluginHelper * helper)
{
VideoPhonePlugin * video;
char const * device;
char const * p;
if((video = object_new(sizeof(*video))) == NULL)
return NULL;
video->helper = helper;
if((device = helper->config_get(helper->phone, "video", "device"))
== NULL)
device = VIDEO_DEVICE;
p = helper->config_get(helper->phone, "video", "hflip");
video->hflip = (p != NULL && p[0] != '\0' && strtol(p, NULL, 10) > 0)
? TRUE : FALSE;
p = helper->config_get(helper->phone, "video", "vflip");
video->vflip = (p != NULL && p[0] != '\0' && strtol(p, NULL, 10) > 0)
? TRUE : FALSE;
p = helper->config_get(helper->phone, "video", "ratio");
video->ratio = (p == NULL || p[0] == '\0' || strtol(p, NULL, 10) != 0)
? TRUE : FALSE;
video->interp = GDK_INTERP_BILINEAR;
video->source = 0;
video->fd = -1;
memset(&video->cap, 0, sizeof(video->cap));
video->channel = NULL;
video->buffers = NULL;
video->buffers_cnt = 0;
video->raw_buffer = NULL;
video->raw_buffer_cnt = 0;
video->rgb_buffer = NULL;
video->rgb_buffer_cnt = 0;
video->yuv_amp = 255;
video->window = NULL;
#if !GTK_CHECK_VERSION(3, 0, 0)
video->gc = NULL;
#endif
/* check for errors */
if((video->device = string_new(device)) == NULL)
{
helper->error(helper->phone,
"Could not initialize the video capture device",
1);
_video_destroy(video);
return NULL;
}
/* create the window */
video->window = gtk_window_new(GTK_WINDOW_TOPLEVEL);
gtk_window_set_title(GTK_WINDOW(video->window), "Phone - Video");
gtk_widget_realize(video->window);
#if !GTK_CHECK_VERSION(3, 0, 0)
video->gc = gdk_gc_new(video->window->window); /* XXX */
#endif
g_signal_connect_swapped(video->window, "delete-event", G_CALLBACK(
_init_on_closex), video);
video->area = gtk_drawing_area_new();
video->pixbuf = NULL;
#if !GTK_CHECK_VERSION(3, 0, 0)
video->pixmap = NULL;
#endif
#if GTK_CHECK_VERSION(3, 0, 0)
g_signal_connect(video->area, "draw", G_CALLBACK(
_video_on_drawing_area_draw), video);
g_signal_connect(video->area, "size-allocate", G_CALLBACK(
_video_on_drawing_area_size_allocate), video);
#else
g_signal_connect(video->area, "configure-event", G_CALLBACK(
_video_on_drawing_area_configure), video);
g_signal_connect(video->area, "expose-event", G_CALLBACK(
_video_on_drawing_area_expose), video);
#endif
gtk_widget_set_size_request(video->area, video->format.fmt.pix.width,
video->format.fmt.pix.height);
gtk_container_add(GTK_CONTAINER(video->window), video->area);
gtk_widget_show_all(video->window);
_video_start(video);
return video;
}
static gboolean _init_on_closex(gpointer data)
{
VideoPhonePlugin * video = data;
gtk_widget_hide(video->window);
_video_stop(video);
return TRUE;
}
/* video_destroy */
static void _video_destroy(VideoPhonePlugin * video)
{
size_t i;
_video_stop(video);
if(video->channel != NULL)
{
/* XXX we ignore errors at this point */
g_io_channel_shutdown(video->channel, TRUE, NULL);
g_io_channel_unref(video->channel);
}
#if !GTK_CHECK_VERSION(3, 0, 0)
if(video->pixmap != NULL)
g_object_unref(video->pixmap);
if(video->gc != NULL)
g_object_unref(video->gc);
#endif
if(video->window != NULL)
gtk_widget_destroy(video->window);
if(video->fd >= 0)
close(video->fd);
if((char *)video->rgb_buffer != video->raw_buffer)
free(video->rgb_buffer);
for(i = 0; i < video->buffers_cnt; i++)
if(video->buffers[i].start != MAP_FAILED)
munmap(video->buffers[i].start,
video->buffers[i].length);
free(video->buffers);
free(video->raw_buffer);
string_delete(video->device);
object_delete(video);
}
/* video_settings */
static void _video_settings(VideoPhonePlugin * video)
{
gtk_window_present(GTK_WINDOW(video->window));
_video_start(video);
}
/* useful */
/* video_ioctl */
static int _video_ioctl(VideoPhonePlugin * video, unsigned long request,
void * data)
{
int ret;
for(;;)
if((ret = ioctl(video->fd, request, data)) != -1
|| errno != EINTR)
break;
return ret;
}
/* video_start */
static void _video_start(VideoPhonePlugin * video)
{
if(video->source != 0)
return;
video->source = g_idle_add(_video_on_open, video);
}
/* video_stop */
static void _video_stop(VideoPhonePlugin * video)
{
if(video->source != 0)
g_source_remove(video->source);
video->source = 0;
}
/* callbacks */
/* video_on_can_mmap */
static gboolean _video_on_can_mmap(GIOChannel * channel, GIOCondition condition,
gpointer data)
{
VideoPhonePlugin * video = data;
PhonePluginHelper * helper = video->helper;
struct v4l2_buffer buf;
if(channel != video->channel || condition != G_IO_IN)
return FALSE;
if(_video_ioctl(video, VIDIOC_DQBUF, &buf) == -1)
{
helper->error(helper->phone, "Could not save picture", 1);
return FALSE;
}
video->raw_buffer = video->buffers[buf.index].start;
video->raw_buffer_cnt = buf.bytesused;
#if 0 /* FIXME the raw buffer is not meant to be free()'d */
video->source = g_idle_add(_video_on_refresh, video);
return FALSE;
#else
_video_on_refresh(video);
video->raw_buffer = NULL;
video->raw_buffer_cnt = 0;
return TRUE;
#endif
}
/* video_on_can_read */
static gboolean _video_on_can_read(GIOChannel * channel, GIOCondition condition,
gpointer data)
{
VideoPhonePlugin * video = data;
PhonePluginHelper * helper = video->helper;
ssize_t s;
#ifdef DEBUG
fprintf(stderr, "DEBUG: %s()\n", __func__);
#endif
if(channel != video->channel || condition != G_IO_IN)
return FALSE;
if((s = read(video->fd, video->raw_buffer, video->raw_buffer_cnt))
<= 0)
{
/* this error can be ignored */
if(errno == EAGAIN)
return TRUE;
close(video->fd);
video->fd = -1;
/* FIXME also free video->buffers */
helper->error(helper->phone, strerror(errno), 1);
video->source = 0;
return FALSE;
}
#ifdef DEBUG
fprintf(stderr, "DEBUG: %s() %lu %ld\n", __func__,
video->raw_buffer_cnt, s);
#endif
video->source = g_idle_add(_video_on_refresh, video);
return FALSE;
}
#if GTK_CHECK_VERSION(3, 0, 0)
/* video_on_drawing_area_draw */
static gboolean _video_on_drawing_area_draw(GtkWidget * widget, cairo_t * cr,
gpointer data)
{
VideoPhonePlugin * video = data;
(void) widget;
if(video->pixbuf != NULL)
{
gdk_cairo_set_source_pixbuf(cr, video->pixbuf, 0, 0);
cairo_paint(cr);
}
return TRUE;
}
/* video_on_drawing_area_size_allocate */
static void _video_on_drawing_area_size_allocate(GtkWidget * widget,
GdkRectangle * allocation, gpointer data)
{
VideoPhonePlugin * video = data;
(void) widget;
video->area_allocation = *allocation;
}
#else
/* video_on_drawing_area_configure */
static gboolean _video_on_drawing_area_configure(GtkWidget * widget,
GdkEventConfigure * event, gpointer data)
{
/* XXX this code is inspired from GQcam */
VideoPhonePlugin * video = data;
GtkAllocation * allocation = &video->area_allocation;
if(video->pixmap != NULL)
g_object_unref(video->pixmap);
/* FIXME requires Gtk+ 2.18 */
gtk_widget_get_allocation(widget, allocation);
#ifdef DEBUG
fprintf(stderr, "DEBUG: %s() %dx%d\n", __func__, allocation->width,
allocation->height);
#endif
video->pixmap = gdk_pixmap_new(widget->window, allocation->width,
allocation->height, -1);
/* FIXME is it not better to scale the previous pixmap for now? */
gdk_draw_rectangle(video->pixmap, video->gc, TRUE, 0, 0,
allocation->width, allocation->height);
return TRUE;
}
/* video_on_drawing_area_expose */
static gboolean _video_on_drawing_area_expose(GtkWidget * widget,
GdkEventExpose * event, gpointer data)
{
/* XXX this code is inspired from GQcam */
VideoPhonePlugin * video = data;
gdk_draw_pixmap(widget->window, video->gc, video->pixmap,
event->area.x, event->area.y,
event->area.x, event->area.y,
event->area.width, event->area.height);
return FALSE;
}
#endif
/* video_on_open */
static int _open_setup(VideoPhonePlugin * video);
#ifdef NOTYET
static int _open_setup_mmap(VideoPhonePlugin * video);
#endif
static int _open_setup_read(VideoPhonePlugin * video);
static gboolean _video_on_open(gpointer data)
{
const int timeout = 10000;
VideoPhonePlugin * video = data;
PhonePluginHelper * helper = video->helper;
#ifdef DEBUG
fprintf(stderr, "DEBUG: %s() \"%s\"\n", __func__, video->device);
#endif
if((video->fd = open(video->device, O_RDWR)) < 0)
{
error_set_code(1, "%s: %s (%s)", video->device,
"Could not open the video capture device",
strerror(errno));
helper->error(helper->phone, error_get(NULL), 1);
video->source = g_timeout_add(timeout, _video_on_open, video);
return FALSE;
}
if(_open_setup(video) != 0)
{
helper->error(helper->phone, error_get(NULL), 1);
close(video->fd);
video->fd = -1;
video->source = g_timeout_add(timeout, _video_on_open, video);
return FALSE;
}
video->source = 0;
#ifdef DEBUG
fprintf(stderr, "DEBUG: %s() %dx%d\n", __func__,
video->format.fmt.pix.width,
video->format.fmt.pix.height);
#endif
/* FIXME allow the window to be smaller */
gtk_widget_set_size_request(video->area, video->format.fmt.pix.width,
video->format.fmt.pix.height);
return FALSE;
}
static int _open_setup(VideoPhonePlugin * video)
{
int ret;
struct v4l2_cropcap cropcap;
struct v4l2_crop crop;
GError * error = NULL;
/* check for capabilities */
if(_video_ioctl(video, VIDIOC_QUERYCAP, &video->cap) == -1)
return -error_set_code(1, "%s: %s (%s)", video->device,
"Could not obtain the capabilities",
strerror(errno));
if((video->cap.capabilities & V4L2_CAP_VIDEO_CAPTURE) == 0)
return -error_set_code(1, "%s: %s", video->device,
"Not a video capture device");
/* reset cropping */
memset(&cropcap, 0, sizeof(cropcap));
cropcap.type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
if(_video_ioctl(video, VIDIOC_CROPCAP, &cropcap) == 0)
{
/* reset to default */
crop.type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
crop.c = cropcap.defrect;
if(_video_ioctl(video, VIDIOC_S_CROP, &crop) == -1
&& errno == EINVAL)
/* XXX ignore this error for now */
error_set_code(1, "%s: %s", video->device,
"Cropping not supported");
}
/* obtain the current format */
if(_video_ioctl(video, VIDIOC_G_FMT, &video->format) == -1)
return -error_set_code(1, "%s: %s", video->device,
"Could not obtain the video capture format");
/* check the current format */
if(video->format.type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
return -error_set_code(1, "%s: %s", video->device,
"Unsupported video capture type");
if((video->cap.capabilities & V4L2_CAP_STREAMING) != 0)
#ifdef NOTYET
ret = _open_setup_mmap(video);
#else
ret = _open_setup_read(video);
#endif
else if((video->cap.capabilities & V4L2_CAP_READWRITE) != 0)
ret = _open_setup_read(video);
else
ret = -error_set_code(1, "%s: %s", video->device,
"Unsupported capabilities");
if(ret != 0)
return ret;
/* setup a IO channel */
video->channel = g_io_channel_unix_new(video->fd);
if(g_io_channel_set_encoding(video->channel, NULL, &error)
!= G_IO_STATUS_NORMAL)
{
error_set_code(1, "%s", error->message);
g_error_free(error);
return -1;
}
g_io_channel_set_buffered(video->channel, FALSE);
video->source = g_io_add_watch(video->channel, G_IO_IN,
_video_on_can_read, video);
return 0;
}
#ifdef NOTYET
static int _open_setup_mmap(VideoPhonePlugin * video)
{
struct v4l2_requestbuffers req;
size_t i;
struct v4l2_buffer buf;
/* memory mapping support */
req.count = 4;
req.type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
req.memory = V4L2_MEMORY_MMAP;
if(_video_ioctl(video, VIDIOC_REQBUFS, &req) == -1)
return -error_set_code(1, "%s: %s", video->device,
"Could not request buffers");
if(req.count < 2)
return -error_set_code(1, "%s: %s", video->device,
"Could not obtain enough buffers");
if((video->buffers = malloc(sizeof(*video->buffers) * req.count))
== NULL)
return -error_set_code(1, "%s: %s", video->device,
"Could not allocate buffers");
video->buffers_cnt = req.count;
/* initialize the buffers */
memset(video->buffers, 0, sizeof(*video->buffers) * video->buffers_cnt);
for(i = 0; i < video->buffers_cnt; i++)
video->buffers[i].start = MAP_FAILED;
/* map the buffers */
for(i = 0; i < video->buffers_cnt; i++)
{
memset(&buf, 0, sizeof(buf));
buf.type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
buf.memory = V4L2_MEMORY_MMAP;
buf.index = i;
if(_video_ioctl(video, VIDIOC_QUERYBUF, &buf) == -1)
return -error_set_code(1, "%s: %s", video->device,
"Could not setup buffers");
video->buffers[i].start = mmap(NULL, buf.length,
PROT_READ | PROT_WRITE, MAP_SHARED, video->fd,
buf.m.offset);
if(video->buffers[i].start == MAP_FAILED)
return -error_set_code(1, "%s: %s", video->device,
"Could not map buffers");
video->buffers[i].length = buf.length;
}
return 0;
}
#endif
static int _open_setup_read(VideoPhonePlugin * video)
{
size_t cnt;
char * p;
/* FIXME also try to obtain a RGB24 format if possible */
/* allocate the raw buffer */
cnt = video->format.fmt.pix.sizeimage;
if((p = realloc(video->raw_buffer, cnt)) == NULL)
return -error_set_code(1, "%s: %s", video->device,
strerror(errno));
video->raw_buffer = p;
video->raw_buffer_cnt = cnt;
/* allocate the rgb buffer */
cnt = video->format.fmt.pix.width * video->format.fmt.pix.height * 3;
if((p = realloc(video->rgb_buffer, cnt)) == NULL)
return -error_set_code(1, "%s: %s", video->device,
strerror(errno));
video->rgb_buffer = (unsigned char *)p;
video->rgb_buffer_cnt = cnt;
return 0;
}
/* video_on_refresh */
static void _refresh_convert(VideoPhonePlugin * video);
static void _refresh_convert_yuv(int amp, uint8_t y, uint8_t u, uint8_t v,
uint8_t * r, uint8_t * g, uint8_t * b);
static void _refresh_hflip(VideoPhonePlugin * video, GdkPixbuf ** pixbuf);
static void _refresh_scale(VideoPhonePlugin * video, GdkPixbuf ** pixbuf);
static void _refresh_vflip(VideoPhonePlugin * video, GdkPixbuf ** pixbuf);
static gboolean _video_on_refresh(gpointer data)
{
VideoPhonePlugin * video = data;
#if !GTK_CHECK_VERSION(3, 0, 0)
GtkAllocation * allocation = &video->area_allocation;
#endif
int width = video->format.fmt.pix.width;
int height = video->format.fmt.pix.height;
#ifdef DEBUG
fprintf(stderr, "DEBUG: %s() 0x%x\n", __func__,
video->format.fmt.pix.pixelformat);
#endif
_refresh_convert(video);
#if !GTK_CHECK_VERSION(3, 0, 0)
if(video->hflip == FALSE
&& video->vflip == FALSE
&& width == allocation->width
&& height == allocation->height)
/* render directly */
gdk_draw_rgb_image(video->pixmap, video->gc, 0, 0,
width, height, GDK_RGB_DITHER_NORMAL,
video->rgb_buffer, width * 3);
else
#endif
{
if(video->pixbuf != NULL)
g_object_unref(video->pixbuf);
/* render after scaling */
video->pixbuf = gdk_pixbuf_new_from_data(video->rgb_buffer,
GDK_COLORSPACE_RGB, FALSE, 8, width, height,
width * 3, NULL, NULL);
_refresh_hflip(video, &video->pixbuf);
_refresh_vflip(video, &video->pixbuf);
_refresh_scale(video, &video->pixbuf);
#if !GTK_CHECK_VERSION(3, 0, 0)
gdk_pixbuf_render_to_drawable(video->pixbuf, video->pixmap,
video->gc, 0, 0, 0, 0, -1, -1,
GDK_RGB_DITHER_NORMAL, 0, 0);
#endif
}
/* force a refresh */
gtk_widget_queue_draw(video->area);
video->source = g_io_add_watch(video->channel, G_IO_IN,
(video->buffers != NULL) ? _video_on_can_mmap
: _video_on_can_read, video);
return FALSE;
}
static void _refresh_convert(VideoPhonePlugin * video)
{
size_t i;
size_t j;
switch(video->format.fmt.pix.pixelformat)
{
case V4L2_PIX_FMT_YUYV:
for(i = 0, j = 0; i + 3 < video->raw_buffer_cnt;
i += 4, j += 6)
{
/* pixel 0 */
_refresh_convert_yuv(video->yuv_amp,
video->raw_buffer[i],
video->raw_buffer[i + 1],
video->raw_buffer[i + 3],
&video->rgb_buffer[j + 2],
&video->rgb_buffer[j + 1],
&video->rgb_buffer[j]);
/* pixel 1 */
_refresh_convert_yuv(video->yuv_amp,
video->raw_buffer[i + 2],
video->raw_buffer[i + 1],
video->raw_buffer[i + 3],
&video->rgb_buffer[j + 5],
&video->rgb_buffer[j + 4],
&video->rgb_buffer[j + 3]);
}
break;
default:
#ifdef DEBUG
fprintf(stderr, "DEBUG: %s() Unsupported format\n",
__func__);
#endif
break;
}
}
static void _refresh_convert_yuv(int amp, uint8_t y, uint8_t u, uint8_t v,
uint8_t * r, uint8_t * g, uint8_t * b)
{
double dr;
double dg;
double db;
dr = amp * (0.004565 * y + 0.007935 * u - 1.088);
dg = amp * (0.004565 * y - 0.001542 * u - 0.003183 * v + 0.531);
db = amp * (0.004565 * y + 0.000001 * u + 0.006250 * v - 0.872);
*r = (dr < 0) ? 0 : ((dr > 255) ? 255 : dr);
*g = (dg < 0) ? 0 : ((dg > 255) ? 255 : dg);
*b = (db < 0) ? 0 : ((db > 255) ? 255 : db);
}
static void _refresh_hflip(VideoPhonePlugin * video, GdkPixbuf ** pixbuf)
{
GdkPixbuf * pixbuf2;
if(video->hflip == FALSE)
return;
/* XXX could probably be more efficient */
pixbuf2 = gdk_pixbuf_flip(*pixbuf, TRUE);
g_object_unref(*pixbuf);
*pixbuf = pixbuf2;
}
static void _refresh_scale(VideoPhonePlugin * video, GdkPixbuf ** pixbuf)
{
GtkAllocation * allocation = &video->area_allocation;
GdkPixbuf * pixbuf2;
gdouble scale;
gint width;
gint height;
gint x;
gint y;
if(video->ratio == FALSE)
pixbuf2 = gdk_pixbuf_scale_simple(*pixbuf, allocation->width,
allocation->height, video->interp);
else
{
if((pixbuf2 = gdk_pixbuf_new(GDK_COLORSPACE_RGB, FALSE, 8,
allocation->width,
allocation->height)) == NULL)
return;
/* XXX could be more efficient */
gdk_pixbuf_fill(pixbuf2, 0);
scale = (gdouble)allocation->width
/ video->format.fmt.pix.width;
scale = MIN(scale, (gdouble)allocation->height
/ video->format.fmt.pix.height);
width = (gdouble)video->format.fmt.pix.width * scale;
width = MIN(width, allocation->width);
height = (gdouble)video->format.fmt.pix.height * scale;
height = MIN(height, allocation->height);
x = (allocation->width - width) / 2;
y = (allocation->height - height) / 2;
gdk_pixbuf_scale(*pixbuf, pixbuf2, x, y, width, height,
0.0, 0.0, scale, scale, video->interp);
}
g_object_unref(*pixbuf);
*pixbuf = pixbuf2;
}
static void _refresh_vflip(VideoPhonePlugin * video, GdkPixbuf ** pixbuf)
{
GdkPixbuf * pixbuf2;
if(video->vflip == FALSE)
return;
/* XXX could probably be more efficient */
pixbuf2 = gdk_pixbuf_flip(*pixbuf, FALSE);
g_object_unref(*pixbuf);
*pixbuf = pixbuf2;
}