608 lines
17 KiB
C
608 lines
17 KiB
C
/* $Id$ */
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/* Copyright (c) 2012-2014 Pierre Pronchery <khorben@defora.org> */
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/* This file is part of DeforaOS Desktop Phone */
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/* This program is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, version 3 of the License.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>. */
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/* TODO:
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* - display a window even if it was impossible to open a capture device
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* - re-use code from the Camera project instead */
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#include <sys/ioctl.h>
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#ifdef __NetBSD__
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# include <sys/videoio.h>
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#else
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# include <linux/videodev2.h>
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#endif
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#include <fcntl.h>
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#include <unistd.h>
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#include <stdlib.h>
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#include <string.h>
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#include <errno.h>
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#include <System.h>
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#include <Desktop.h>
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#include "Phone.h"
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/* Video */
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/* private */
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/* types */
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typedef struct _PhonePlugin
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{
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PhonePluginHelper * helper;
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String * device;
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gboolean hflip;
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gboolean vflip;
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gboolean ratio;
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GdkInterpType interp;
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guint source;
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int fd;
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struct v4l2_capability cap;
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struct v4l2_format format;
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/* IO channel */
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GIOChannel * channel;
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/* input data */
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char * raw_buffer;
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size_t raw_buffer_cnt;
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/* RGB data */
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unsigned char * rgb_buffer;
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size_t rgb_buffer_cnt;
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/* decoding */
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int yuv_amp;
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/* widgets */
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GdkGC * gc;
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GtkWidget * window;
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GtkWidget * area;
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GtkAllocation area_allocation;
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GdkPixmap * pixmap;
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} VideoPhonePlugin;
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/* prototypes */
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/* plug-in */
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static VideoPhonePlugin * _video_init(PhonePluginHelper * helper);
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static void _video_destroy(VideoPhonePlugin * video);
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/* useful */
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static int _video_ioctl(VideoPhonePlugin * video, unsigned long request,
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void * data);
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static void _video_start(VideoPhonePlugin * video);
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static void _video_stop(VideoPhonePlugin * video);
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/* callbacks */
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static gboolean _video_on_can_read(GIOChannel * channel, GIOCondition condition,
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gpointer data);
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static gboolean _video_on_closex(gpointer data);
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static gboolean _video_on_drawing_area_configure(GtkWidget * widget,
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GdkEventConfigure * event, gpointer data);
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static gboolean _video_on_drawing_area_expose(GtkWidget * widget,
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GdkEventExpose * event, gpointer data);
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static gboolean _video_on_open(gpointer data);
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static gboolean _video_on_refresh(gpointer data);
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/* public */
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/* variables */
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PhonePluginDefinition plugin =
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{
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"Video",
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"camera-video",
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NULL,
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_video_init,
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_video_destroy,
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NULL,
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NULL
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};
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/* private */
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/* functions */
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/* video_init */
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static VideoPhonePlugin * _video_init(PhonePluginHelper * helper)
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{
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VideoPhonePlugin * video;
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char const * device;
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char const * p;
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if((video = object_new(sizeof(*video))) == NULL)
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return NULL;
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video->helper = helper;
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if((device = helper->config_get(helper->phone, "video", "device"))
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== NULL)
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device = "/dev/video0";
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p = helper->config_get(helper->phone, "video", "hflip");
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video->hflip = (p != NULL && p[0] != '\0' && strtol(p, NULL, 10) > 0)
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? TRUE : FALSE;
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p = helper->config_get(helper->phone, "video", "vflip");
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video->vflip = (p != NULL && p[0] != '\0' && strtol(p, NULL, 10) > 0)
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? TRUE : FALSE;
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p = helper->config_get(helper->phone, "video", "ratio");
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video->ratio = (p == NULL || p[0] == '\0' || strtol(p, NULL, 10) != 0)
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? TRUE : FALSE;
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video->interp = GDK_INTERP_BILINEAR;
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video->source = 0;
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video->fd = -1;
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memset(&video->cap, 0, sizeof(video->cap));
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video->channel = NULL;
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video->raw_buffer = NULL;
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video->raw_buffer_cnt = 0;
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video->rgb_buffer = NULL;
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video->rgb_buffer_cnt = 0;
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video->yuv_amp = 255;
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video->gc = NULL;
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video->window = NULL;
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/* check for errors */
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if((video->device = string_new(device)) == NULL)
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{
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helper->error(helper->phone,
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"Could not initialize the video capture device",
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1);
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_video_destroy(video);
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return NULL;
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}
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/* create the window */
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video->window = gtk_window_new(GTK_WINDOW_TOPLEVEL);
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gtk_window_set_title(GTK_WINDOW(video->window), "Phone - Video");
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gtk_widget_realize(video->window);
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video->gc = gdk_gc_new(video->window->window); /* XXX */
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g_signal_connect_swapped(video->window, "delete-event", G_CALLBACK(
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_video_on_closex), video);
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video->area = gtk_drawing_area_new();
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video->pixmap = NULL;
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g_signal_connect(video->area, "configure-event", G_CALLBACK(
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_video_on_drawing_area_configure), video);
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g_signal_connect(video->area, "expose-event", G_CALLBACK(
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_video_on_drawing_area_expose), video);
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gtk_widget_set_size_request(video->area, video->format.fmt.pix.width,
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video->format.fmt.pix.height);
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gtk_container_add(GTK_CONTAINER(video->window), video->area);
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gtk_widget_show_all(video->window);
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_video_start(video);
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return video;
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}
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/* video_destroy */
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static void _video_destroy(VideoPhonePlugin * video)
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{
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_video_stop(video);
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if(video->channel != NULL)
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{
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/* XXX we ignore errors at this point */
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g_io_channel_shutdown(video->channel, TRUE, NULL);
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#if 0
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/* FIXME seems to cause a crash in the original code */
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g_object_unref(video->channel);
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#endif
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}
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if(video->pixmap != NULL)
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g_object_unref(video->pixmap);
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if(video->gc != NULL)
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g_object_unref(video->gc);
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if(video->window != NULL)
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gtk_widget_destroy(video->window);
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if(video->fd >= 0)
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close(video->fd);
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if((char *)video->rgb_buffer != video->raw_buffer)
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free(video->rgb_buffer);
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free(video->raw_buffer);
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string_delete(video->device);
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object_delete(video);
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}
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/* useful */
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/* video_ioctl */
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static int _video_ioctl(VideoPhonePlugin * video, unsigned long request,
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void * data)
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{
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int ret;
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for(;;)
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if((ret = ioctl(video->fd, request, data)) != -1
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|| errno != EINTR)
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break;
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return ret;
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}
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/* video_start */
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static void _video_start(VideoPhonePlugin * video)
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{
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if(video->source != 0)
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return;
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video->source = g_idle_add(_video_on_open, video);
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}
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/* video_stop */
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static void _video_stop(VideoPhonePlugin * video)
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{
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if(video->source != 0)
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g_source_remove(video->source);
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video->source = 0;
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}
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/* callbacks */
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/* video_on_can_read */
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static gboolean _video_on_can_read(GIOChannel * channel, GIOCondition condition,
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gpointer data)
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{
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VideoPhonePlugin * video = data;
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PhonePluginHelper * helper = video->helper;
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ssize_t s;
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#ifdef DEBUG
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fprintf(stderr, "DEBUG: %s()\n", __func__);
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#endif
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if(channel != video->channel || condition != G_IO_IN)
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return FALSE;
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if((s = read(video->fd, video->raw_buffer, video->raw_buffer_cnt))
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<= 0)
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{
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/* this error can be ignored */
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if(errno == EAGAIN)
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return TRUE;
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close(video->fd);
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video->fd = -1;
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helper->error(helper->phone, strerror(errno), 1);
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video->source = 0;
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return FALSE;
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}
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#ifdef DEBUG
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fprintf(stderr, "DEBUG: %s() %lu %ld\n", __func__,
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video->raw_buffer_cnt, s);
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#endif
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video->source = g_idle_add(_video_on_refresh, video);
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return FALSE;
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}
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/* video_on_closex */
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static gboolean _video_on_closex(gpointer data)
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{
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VideoPhonePlugin * video = data;
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gtk_widget_hide(video->window);
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_video_stop(video);
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return TRUE;
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}
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/* video_on_drawing_area_configure */
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static gboolean _video_on_drawing_area_configure(GtkWidget * widget,
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GdkEventConfigure * event, gpointer data)
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{
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/* XXX this code is inspired from GQcam */
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VideoPhonePlugin * video = data;
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GtkAllocation * allocation = &video->area_allocation;
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if(video->pixmap != NULL)
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g_object_unref(video->pixmap);
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/* FIXME requires Gtk+ 2.18 */
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gtk_widget_get_allocation(widget, allocation);
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#ifdef DEBUG
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fprintf(stderr, "DEBUG: %s() %dx%d\n", __func__, allocation->width,
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allocation->height);
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#endif
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video->pixmap = gdk_pixmap_new(widget->window, allocation->width,
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allocation->height, -1);
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/* FIXME is it not better to scale the previous pixmap for now? */
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gdk_draw_rectangle(video->pixmap, video->gc, TRUE, 0, 0,
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allocation->width, allocation->height);
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return TRUE;
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}
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/* video_on_drawing_area_expose */
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static gboolean _video_on_drawing_area_expose(GtkWidget * widget,
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GdkEventExpose * event, gpointer data)
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{
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/* XXX this code is inspired from GQcam */
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VideoPhonePlugin * video = data;
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gdk_draw_pixmap(widget->window, video->gc, video->pixmap,
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event->area.x, event->area.y,
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event->area.x, event->area.y,
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event->area.width, event->area.height);
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return FALSE;
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}
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/* video_on_open */
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static int _open_setup(VideoPhonePlugin * video);
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static gboolean _video_on_open(gpointer data)
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{
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VideoPhonePlugin * video = data;
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PhonePluginHelper * helper = video->helper;
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#ifdef DEBUG
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fprintf(stderr, "DEBUG: %s() \"%s\"\n", __func__, video->device);
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#endif
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if((video->fd = open(video->device, O_RDWR)) < 0)
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{
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error_set_code(1, "%s: %s (%s)", video->device,
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"Could not open the video capture device",
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strerror(errno));
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helper->error(helper->phone, error_get(), 1);
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video->source = g_timeout_add(10000, _video_on_open, video);
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return FALSE;
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}
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if(_open_setup(video) != 0)
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{
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helper->error(helper->phone, error_get(), 1);
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close(video->fd);
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video->fd = -1;
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video->source = g_timeout_add(10000, _video_on_open, video);
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return FALSE;
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}
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video->source = 0;
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#ifdef DEBUG
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fprintf(stderr, "DEBUG: %s() %dx%d\n", __func__,
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video->format.fmt.pix.width,
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video->format.fmt.pix.height);
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#endif
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/* FIXME allow the window to be smaller */
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gtk_widget_set_size_request(video->area, video->format.fmt.pix.width,
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video->format.fmt.pix.height);
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return FALSE;
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}
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static int _open_setup(VideoPhonePlugin * video)
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{
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struct v4l2_cropcap cropcap;
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struct v4l2_crop crop;
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size_t cnt;
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char * p;
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GError * error = NULL;
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/* check for errors */
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if(_video_ioctl(video, VIDIOC_QUERYCAP, &video->cap) == -1)
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return -error_set_code(1, "%s: %s (%s)", video->device,
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"Could not obtain the capabilities",
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strerror(errno));
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if((video->cap.capabilities & V4L2_CAP_VIDEO_CAPTURE) == 0
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/* FIXME also implement mmap() and streaming */
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|| (video->cap.capabilities & V4L2_CAP_READWRITE) == 0)
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return -error_set_code(1, "%s: %s", video->device,
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"Unsupported capabilities");
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/* reset cropping */
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memset(&cropcap, 0, sizeof(cropcap));
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cropcap.type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
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if(_video_ioctl(video, VIDIOC_CROPCAP, &cropcap) == 0)
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{
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/* reset to default */
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crop.type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
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crop.c = cropcap.defrect;
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if(_video_ioctl(video, VIDIOC_S_CROP, &crop) == -1
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&& errno == EINVAL)
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/* XXX ignore this error for now */
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error_set_code(1, "%s: %s", video->device,
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"Cropping not supported");
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}
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/* obtain the current format */
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if(_video_ioctl(video, VIDIOC_G_FMT, &video->format) == -1)
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return -error_set_code(1, "%s: %s", video->device,
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"Could not obtain the video capture format");
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/* check the current format */
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if(video->format.type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
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return -error_set_code(1, "%s: %s", video->device,
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"Unsupported video capture type");
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/* FIXME also try to obtain a RGB24 format if possible */
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/* allocate the raw buffer */
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cnt = video->format.fmt.pix.sizeimage;
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if((p = realloc(video->raw_buffer, cnt)) == NULL)
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return -error_set_code(1, "%s: %s", video->device,
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strerror(errno));
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video->raw_buffer = p;
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video->raw_buffer_cnt = cnt;
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/* allocate the rgb buffer */
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cnt = video->format.fmt.pix.width * video->format.fmt.pix.height * 3;
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if((p = realloc(video->rgb_buffer, cnt)) == NULL)
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return -error_set_code(1, "%s: %s", video->device,
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strerror(errno));
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video->rgb_buffer = (unsigned char *)p;
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video->rgb_buffer_cnt = cnt;
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/* setup a IO channel */
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video->channel = g_io_channel_unix_new(video->fd);
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if(g_io_channel_set_encoding(video->channel, NULL, &error)
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!= G_IO_STATUS_NORMAL)
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{
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error_set_code(1, "%s", error->message);
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g_error_free(error);
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return -1;
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}
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g_io_channel_set_buffered(video->channel, FALSE);
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video->source = g_io_add_watch(video->channel, G_IO_IN,
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_video_on_can_read, video);
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return 0;
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}
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/* video_on_refresh */
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static void _refresh_convert(VideoPhonePlugin * video);
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static void _refresh_convert_yuv(int amp, uint8_t y, uint8_t u, uint8_t v,
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uint8_t * r, uint8_t * g, uint8_t * b);
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static void _refresh_hflip(VideoPhonePlugin * video, GdkPixbuf ** pixbuf);
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static void _refresh_scale(VideoPhonePlugin * video, GdkPixbuf ** pixbuf);
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static void _refresh_vflip(VideoPhonePlugin * video, GdkPixbuf ** pixbuf);
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static gboolean _video_on_refresh(gpointer data)
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{
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VideoPhonePlugin * video = data;
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GtkAllocation * allocation = &video->area_allocation;
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int width = video->format.fmt.pix.width;
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int height = video->format.fmt.pix.height;
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GdkPixbuf * pixbuf;
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#ifdef DEBUG
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fprintf(stderr, "DEBUG: %s() 0x%x\n", __func__,
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video->format.fmt.pix.pixelformat);
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#endif
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_refresh_convert(video);
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if(video->hflip == FALSE
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&& video->vflip == FALSE
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&& width == allocation->width
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&& height == allocation->height)
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/* render directly */
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gdk_draw_rgb_image(video->pixmap, video->gc, 0, 0,
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width, height, GDK_RGB_DITHER_NORMAL,
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video->rgb_buffer, width * 3);
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else
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{
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/* render after scaling */
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pixbuf = gdk_pixbuf_new_from_data(video->rgb_buffer,
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GDK_COLORSPACE_RGB, FALSE, 8, width, height,
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width * 3, NULL, NULL);
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_refresh_hflip(video, &pixbuf);
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_refresh_vflip(video, &pixbuf);
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_refresh_scale(video, &pixbuf);
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gdk_pixbuf_render_to_drawable(pixbuf, video->pixmap,
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video->gc, 0, 0, 0, 0, -1, -1,
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GDK_RGB_DITHER_NORMAL, 0, 0);
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g_object_unref(pixbuf);
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}
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/* force a refresh */
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gtk_widget_queue_draw_area(video->area, 0, 0,
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video->area_allocation.width,
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video->area_allocation.height);
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video->source = g_io_add_watch(video->channel, G_IO_IN,
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_video_on_can_read, video);
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return FALSE;
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}
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static void _refresh_convert(VideoPhonePlugin * video)
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{
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size_t i;
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size_t j;
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switch(video->format.fmt.pix.pixelformat)
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{
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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;
|
|
}
|