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megapixels
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Code Issues Releases Wiki Activity

Retrieve camera state when disableing an auto control

This commit is contained in:
Martijn Braam 2020-10-03 17:38:38 +02:00
parent 5d872860f9
commit 0fb190dbc7
1 changed files with 96 additions and 86 deletions
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182
main.c
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@ -242,6 +242,19 @@ v4l2_ctrl_set(int fd, uint32_t id, int val)
return 0;
}
static int
v4l2_ctrl_get(int fd, uint32_t id)
{
struct v4l2_control ctrl = {0};
ctrl.id = id;
if (xioctl(fd, VIDIOC_G_CTRL, &ctrl) == -1) {
g_printerr("Failed to get control %d\n", id);
return -1;
}
return ctrl.value;
}
static int
v4l2_has_control(int fd, int control_id)
{
@ -262,6 +275,81 @@ v4l2_has_control(int fd, int control_id)
return 1;
}
static void
draw_controls()
{
cairo_t *cr;
char iso[6];
char shutterangle[6];
if (auto_exposure) {
sprintf(shutterangle, "auto");
} else {
sprintf(shutterangle, "%d", exposure);
}
if (auto_gain) {
sprintf(iso, "auto");
} else {
sprintf(iso, "%d", gain);
}
if (status_surface)
cairo_surface_destroy(status_surface);
// Make a service to show status of controls, 32px high
status_surface = gdk_window_create_similar_surface(gtk_widget_get_window(preview),
CAIRO_CONTENT_COLOR_ALPHA,
preview_width, 32);
cr = cairo_create(status_surface);
cairo_set_source_rgba(cr, 0, 0, 0, 0.0);
cairo_paint(cr);
// Draw the outlines for the headings
cairo_select_font_face(cr, "sans-serif", CAIRO_FONT_SLANT_NORMAL, CAIRO_FONT_WEIGHT_BOLD);
cairo_set_font_size(cr, 9);
cairo_set_source_rgba(cr, 0, 0, 0, 1);
cairo_move_to(cr, 16, 16);
cairo_text_path(cr, "ISO");
cairo_stroke(cr);
cairo_move_to(cr, 60, 16);
cairo_text_path(cr, "Shutter");
cairo_stroke(cr);
// Draw the fill for the headings
cairo_set_source_rgba(cr, 1, 1, 1, 1);
cairo_move_to(cr, 16, 16);
cairo_show_text(cr, "ISO");
cairo_move_to(cr, 60, 16);
cairo_show_text(cr, "Shutter");
// Draw the outlines for the values
cairo_select_font_face(cr, "sans-serif", CAIRO_FONT_SLANT_NORMAL, CAIRO_FONT_WEIGHT_NORMAL);
cairo_set_font_size(cr, 11);
cairo_set_source_rgba(cr, 0, 0, 0, 1);
cairo_move_to(cr, 16, 26);
cairo_text_path(cr, iso);
cairo_stroke(cr);
cairo_move_to(cr, 60, 26);
cairo_text_path(cr, shutterangle);
cairo_stroke(cr);
// Draw the fill for the values
cairo_set_source_rgba(cr, 1, 1, 1, 1);
cairo_move_to(cr, 16, 26);
cairo_show_text(cr, iso);
cairo_move_to(cr, 60, 26);
cairo_show_text(cr, shutterangle);
cairo_destroy(cr);
}
static void
init_sensor(char *fn, int width, int height, int mbus, int rate)
{
@ -308,18 +396,10 @@ init_sensor(char *fn, int width, int height, int mbus, int rate)
current.has_af_s = 1;
}
if (auto_exposure) {
v4l2_ctrl_set(fd, V4L2_CID_EXPOSURE_AUTO, V4L2_EXPOSURE_AUTO);
} else {
v4l2_ctrl_set(fd, V4L2_CID_EXPOSURE_AUTO, V4L2_EXPOSURE_MANUAL);
v4l2_ctrl_set(fd, V4L2_CID_EXPOSURE, height/2);
}
if (auto_gain) {
v4l2_ctrl_set(fd, V4L2_CID_AUTOGAIN, 1);
} else {
v4l2_ctrl_set(fd, V4L2_CID_AUTOGAIN, 0);
v4l2_ctrl_set(fd, V4L2_CID_GAIN, 0);
}
auto_exposure = 1;
auto_gain = 1;
draw_controls();
close(current.fd);
current.fd = fd;
}
@ -650,80 +730,6 @@ preview_draw(GtkWidget *widget, cairo_t *cr, gpointer data)
return FALSE;
}
static void
draw_controls()
{
cairo_t *cr;
char iso[6];
char shutterangle[6];
if (auto_exposure) {
sprintf(shutterangle, "auto");
} else {
sprintf(shutterangle, "%d", exposure);
}
if (auto_gain) {
sprintf(iso, "auto");
} else {
sprintf(iso, "%d", gain);
}
if (status_surface)
cairo_surface_destroy(status_surface);
// Make a service to show status of controls, 32px high
status_surface = gdk_window_create_similar_surface(gtk_widget_get_window(preview),
CAIRO_CONTENT_COLOR_ALPHA,
preview_width, 32);
cr = cairo_create(status_surface);
cairo_set_source_rgba(cr, 0, 0, 0, 0.0);
cairo_paint(cr);
// Draw the outlines for the headings
cairo_select_font_face(cr, "sans-serif", CAIRO_FONT_SLANT_NORMAL, CAIRO_FONT_WEIGHT_BOLD);
cairo_set_font_size(cr, 9);
cairo_set_source_rgba(cr, 0, 0, 0, 1);
cairo_move_to(cr, 16, 16);
cairo_text_path(cr, "ISO");
cairo_stroke(cr);
cairo_move_to(cr, 60, 16);
cairo_text_path(cr, "Shutter");
cairo_stroke(cr);
// Draw the fill for the headings
cairo_set_source_rgba(cr, 1, 1, 1, 1);
cairo_move_to(cr, 16, 16);
cairo_show_text(cr, "ISO");
cairo_move_to(cr, 60, 16);
cairo_show_text(cr, "Shutter");
// Draw the outlines for the values
cairo_select_font_face(cr, "sans-serif", CAIRO_FONT_SLANT_NORMAL, CAIRO_FONT_WEIGHT_NORMAL);
cairo_set_font_size(cr, 11);
cairo_set_source_rgba(cr, 0, 0, 0, 1);
cairo_move_to(cr, 16, 26);
cairo_text_path(cr, iso);
cairo_stroke(cr);
cairo_move_to(cr, 60, 26);
cairo_text_path(cr, shutterangle);
cairo_stroke(cr);
// Draw the fill for the values
cairo_set_source_rgba(cr, 1, 1, 1, 1);
cairo_move_to(cr, 16, 26);
cairo_show_text(cr, iso);
cairo_move_to(cr, 60, 26);
cairo_show_text(cr, shutterangle);
cairo_destroy(cr);
}
static gboolean
preview_configure(GtkWidget *widget, GdkEventConfigure *event)
@ -1211,6 +1217,8 @@ on_control_auto_toggled(GtkToggleButton *widget, gpointer user_data)
v4l2_ctrl_set(fd, V4L2_CID_AUTOGAIN, 1);
} else {
v4l2_ctrl_set(fd, V4L2_CID_AUTOGAIN, 0);
gain = v4l2_ctrl_get(fd, V4L2_CID_GAIN);
gtk_adjustment_set_value(GTK_ADJUSTMENT(control_slider), (double)gain);
}
break;
case USER_CONTROL_SHUTTER:
@ -1219,6 +1227,8 @@ on_control_auto_toggled(GtkToggleButton *widget, gpointer user_data)
v4l2_ctrl_set(fd, V4L2_CID_EXPOSURE_AUTO, V4L2_EXPOSURE_AUTO);
} else {
v4l2_ctrl_set(fd, V4L2_CID_EXPOSURE_AUTO, V4L2_EXPOSURE_MANUAL);
exposure = v4l2_ctrl_get(fd, V4L2_CID_EXPOSURE);
gtk_adjustment_set_value(GTK_ADJUSTMENT(control_slider), (double)exposure);
}
break;
}