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authorBenjamin Franzke <benjaminfranzke@googlemail.com>2012-04-05 10:00:00 +0200
committerBenjamin Franzke <benjaminfranzke@googlemail.com>2012-04-05 12:09:37 +0200
commit9c7602733b9f64ee5e3ced0a5c081bfb854d8c3d (patch)
tree1f48717a77a1085c021e2e73b6b5ea46deb4a25c
parentae45e28aab6631d0233754b5c2502c931483091a (diff)
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capture: Add keybindings to stop/continue capturing
-rw-r--r--capture.c118
1 files changed, 68 insertions, 50 deletions
diff --git a/capture.c b/capture.c
index 8576e20..49d360b 100644
--- a/capture.c
+++ b/capture.c
@@ -25,8 +25,59 @@ struct ct {
struct {
double x1, y1, x2, y2;
} rubberband;
+
+ int idle_source;
};
+static gboolean
+capture(gpointer userdata)
+{
+ struct ct *ct = userdata;
+ IplImage *image;
+ guchar *row1, *row2, *p1, *p2;
+ int x, y;
+
+ image = cvQueryFrame(ct->capture);
+ if (!image) {
+ fprintf(stderr, "ERROR: frame is null...\n");
+ exit(EXIT_FAILURE);
+ }
+
+ if (!ct->surface ||
+ cairo_image_surface_get_width(ct->surface) != image->width ||
+ cairo_image_surface_get_height(ct->surface) != image->height) {
+ if (ct->surface)
+ cairo_surface_destroy(ct->surface);
+ ct->surface =
+ cairo_image_surface_create(CAIRO_FORMAT_RGB24,
+ image->width, image->height);
+ }
+
+ row1 = (guchar *) image->imageData;
+ row2 = cairo_image_surface_get_data(ct->surface);
+ for (y = 0; y < image->height; ++y) {
+ p1 = row1;
+ p2 = row2;
+
+ for (x = 0; x < image->width; ++x) {
+ /*
+ p2[0] = p1[0];
+ p2[1] = p1[1];
+ p2[2] = p1[2];
+ p2[3] = 0;
+ */
+ memcpy(p2, p1, 3);
+
+ p1 += image->nChannels;
+ p2 += 4;
+ }
+ row1 += image->widthStep;
+ row2 += cairo_image_surface_get_stride(ct->surface);
+ }
+ gtk_widget_queue_draw(ct->drawing_area);
+ return TRUE;
+}
+
static inline void
calc_rubberband_rect(struct ct *ct,
double *x, double *y,
@@ -87,9 +138,23 @@ button_release_event(GtkWidget *widget, GdkEventButton *event, gpointer userdata
static gboolean
key_event(GtkWidget *widget, GdkEventKey *event, gpointer userdata)
{
+ struct ct *ct = userdata;
+
switch (event->type) {
case GDK_KEY_PRESS:
switch (event->keyval) {
+ case GDK_KEY_s:
+ case GDK_KEY_S:
+ if (ct->idle_source) {
+ g_source_remove(ct->idle_source);
+ ct->idle_source = 0;
+ }
+ break;
+ case GDK_KEY_c:
+ case GDK_KEY_C:
+ if (!ct->idle_source)
+ ct->idle_source = g_idle_add(capture, ct);
+ break;
case GDK_KEY_q:
case GDK_KEY_Q:
gtk_main_quit();
@@ -148,55 +213,6 @@ draw_cb(GtkWidget *widget, cairo_t *cr, gpointer userdata)
return FALSE;
}
-static gboolean
-capture(gpointer userdata)
-{
- struct ct *ct = userdata;
- IplImage *image;
- guchar *row1, *row2, *p1, *p2;
- int x, y;
-
- image = cvQueryFrame(ct->capture);
- if (!image) {
- fprintf(stderr, "ERROR: frame is null...\n");
- exit(EXIT_FAILURE);
- }
-
- if (!ct->surface ||
- cairo_image_surface_get_width(ct->surface) != image->width ||
- cairo_image_surface_get_height(ct->surface) != image->height) {
- if (ct->surface)
- cairo_surface_destroy(ct->surface);
- ct->surface =
- cairo_image_surface_create(CAIRO_FORMAT_RGB24,
- image->width, image->height);
- }
-
- row1 = (guchar *) image->imageData;
- row2 = cairo_image_surface_get_data(ct->surface);
- for (y = 0; y < image->height; ++y) {
- p1 = row1;
- p2 = row2;
-
- for (x = 0; x < image->width; ++x) {
- /*
- p2[0] = p1[0];
- p2[1] = p1[1];
- p2[2] = p1[2];
- p2[3] = 0;
- */
- memcpy(p2, p1, 3);
-
- p1 += image->nChannels;
- p2 += 4;
- }
- row1 += image->widthStep;
- row2 += cairo_image_surface_get_stride(ct->surface);
- }
- gtk_widget_queue_draw(ct->drawing_area);
- return TRUE;
-}
-
int
main(int argc, char *argv[])
{
@@ -251,10 +267,12 @@ main(int argc, char *argv[])
g_signal_connect(ct.drawing_area, "motion-notify-event",
G_CALLBACK(motion_notify_event), &ct);
- g_idle_add(capture, &ct);
+ ct.idle_source = g_idle_add(capture, &ct);
gtk_widget_show_all(ct.window);
gtk_main();
+ if (ct.idle_source)
+ g_source_remove(ct.idle_source);
cvReleaseCapture(&ct.capture);
return 0;