Now really functional (with code imported from the Camera project)
This commit is contained in:
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365bba7265
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f1d5d9ccd5
@ -1,5 +1,5 @@
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/* $Id$ */
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/* Copyright (c) 2012 Pierre Pronchery <khorben@defora.org> */
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/* Copyright (c) 2012-2013 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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@ -14,7 +14,8 @@
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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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* - attempt to open the video device at regular intervals
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* - display a window even if it was impossible to open a capture device */
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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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@ -26,6 +27,7 @@
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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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@ -40,13 +42,33 @@ typedef struct _PhonePlugin
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{
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PhonePluginHelper * helper;
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int fd;
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String * device;
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guint source;
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Buffer * buffer;
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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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@ -60,7 +82,13 @@ static int _video_ioctl(VideoPhonePlugin * video, unsigned long request,
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void * data);
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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_refresh(gpointer data);
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@ -81,35 +109,85 @@ PhonePluginDefinition plugin =
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/* private */
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/* functions */
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/* video_init */
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static int _open_setup(VideoPhonePlugin * video);
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static VideoPhonePlugin * _video_init(PhonePluginHelper * helper)
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{
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VideoPhonePlugin * video;
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struct v4l2_capability cap;
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struct v4l2_cropcap cropcap;
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struct v4l2_crop crop;
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struct v4l2_format format;
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char const * device = NULL;
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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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/* FIXME let this be configurable */
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video->fd = open("/dev/video0", O_RDWR);
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video->buffer = buffer_new(0, NULL);
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if(device == NULL)
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device = "/dev/video0";
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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->buffer == NULL
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|| video->fd < 0
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|| _video_ioctl(video, VIDIOC_QUERYCAP, &cap) == -1
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|| (cap.capabilities & V4L2_CAP_VIDEO_CAPTURE) == 0
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/* FIXME also implement mmap() and streaming */
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|| (cap.capabilities & V4L2_CAP_READWRITE) == 0)
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if((video->device = string_new(device)) == NULL
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|| (video->fd = open(device, O_RDWR)) < 0)
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{
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helper->error(helper->phone,
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"Could not open the video capture device", 1);
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_video_destroy(video);
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return NULL;
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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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_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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if(_video_on_refresh(video) == TRUE)
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video->source = g_timeout_add(1000, _video_on_refresh, video);
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return video;
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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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@ -120,44 +198,75 @@ static VideoPhonePlugin * _video_init(PhonePluginHelper * helper)
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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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helper->error(helper->phone, "Cropping not supported",
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0);
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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, &format) == -1
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|| buffer_set_size(video->buffer,
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format.fmt.pix.sizeimage) != 0)
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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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_video_destroy(video);
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return NULL;
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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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/* create the window */
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video->window = gtk_window_new(GTK_WINDOW_TOPLEVEL);
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gtk_window_set_resizable(GTK_WINDOW(video->window), FALSE);
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gtk_window_set_title(GTK_WINDOW(video->window), "Phone - Video");
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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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gtk_widget_set_size_request(video->area, format.fmt.pix.width,
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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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if(_video_on_refresh(video) == TRUE)
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video->source = g_timeout_add(1000, _video_on_refresh, video);
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return video;
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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_destroy */
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static void _video_destroy(VideoPhonePlugin * video)
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{
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if(video->window != NULL)
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gtk_widget_destroy(video->window);
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if(video->source != 0)
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g_source_remove(video->source);
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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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buffer_delete(video->buffer);
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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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@ -178,6 +287,40 @@ static int _video_ioctl(VideoPhonePlugin * video, unsigned long request,
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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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@ -191,22 +334,142 @@ static gboolean _video_on_closex(gpointer data)
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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_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 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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GdkPixbuf * pixbuf2;
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/* FIXME no longer block on read() */
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if(read(video->fd, buffer_get_data(video->buffer),
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buffer_get_size(video->buffer)) <= 0)
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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(width == allocation->width && 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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/* 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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return FALSE;
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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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pixbuf2 = gdk_pixbuf_scale_simple(pixbuf, allocation->width,
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allocation->height, GDK_INTERP_BILINEAR);
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gdk_pixbuf_render_to_drawable(pixbuf2, 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(pixbuf2);
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g_object_unref(pixbuf);
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}
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/* FIXME implement the rest */
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return TRUE;
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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:
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for(i = 0, j = 0; i + 3 < video->raw_buffer_cnt;
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i += 4, j += 6)
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{
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/* pixel 0 */
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_refresh_convert_yuv(video->yuv_amp,
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video->raw_buffer[i],
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video->raw_buffer[i + 1],
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video->raw_buffer[i + 3],
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&video->rgb_buffer[j + 2],
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&video->rgb_buffer[j + 1],
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&video->rgb_buffer[j]);
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/* pixel 1 */
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_refresh_convert_yuv(video->yuv_amp,
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video->raw_buffer[i + 2],
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video->raw_buffer[i + 1],
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video->raw_buffer[i + 3],
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&video->rgb_buffer[j + 5],
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&video->rgb_buffer[j + 4],
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&video->rgb_buffer[j + 3]);
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}
|
||||
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);
|
||||
}
|
||||
|
Loading…
Reference in New Issue
Block a user