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-rw-r--r--gst/videofilter/gstgamma.c143
1 files changed, 137 insertions, 6 deletions
diff --git a/gst/videofilter/gstgamma.c b/gst/videofilter/gstgamma.c
index b05127c0..d6a5d2c0 100644
--- a/gst/videofilter/gstgamma.c
+++ b/gst/videofilter/gstgamma.c
@@ -53,7 +53,11 @@ struct _GstGamma {
GstVideofilter videofilter;
double gamma;
+ double gamma_r, gamma_g, gamma_b;
guint8 gamma_table[256];
+ guint8 gamma_table_r[256];
+ guint8 gamma_table_g[256];
+ guint8 gamma_table_b[256];
};
struct _GstGammaClass {
@@ -70,6 +74,9 @@ enum {
enum {
ARG_0,
ARG_GAMMA,
+ ARG_GAMMA_R,
+ ARG_GAMMA_G,
+ ARG_GAMMA_B,
/* FILL ME */
};
@@ -81,8 +88,10 @@ static void gst_gamma_set_property (GObject *object, guint prop_id, const GValu
static void gst_gamma_get_property (GObject *object, guint prop_id, GValue *value, GParamSpec *pspec);
static void gst_gamma_planar411(GstVideofilter *videofilter, void *dest, void *src);
+static void gst_gamma_rgb24(GstVideofilter *videofilter, void *dest, void *src);
+static void gst_gamma_rgb32(GstVideofilter *videofilter, void *dest, void *src);
static void gst_gamma_setup(GstVideofilter *videofilter);
-static void gst_gamma_calculate_table (GstGamma *gamma);
+static void gst_gamma_calculate_tables (GstGamma *gamma);
GType
gst_gamma_get_type (void)
@@ -109,6 +118,8 @@ gst_gamma_get_type (void)
static GstVideofilterFormat gst_gamma_formats[] = {
{ "I420", 12, gst_gamma_planar411, },
+ { "RGB ", 24, gst_gamma_rgb24, 24, G_BIG_ENDIAN, 0xff0000, 0xff00, 0xff },
+ { "RGB ", 32, gst_gamma_rgb32, 24, G_BIG_ENDIAN, 0x00ff00, 0xff0000, 0xff000000 },
};
@@ -147,6 +158,15 @@ gst_gamma_class_init (gpointer g_class, gpointer class_data)
g_object_class_install_property(gobject_class, ARG_GAMMA,
g_param_spec_double("gamma", "Gamma", "gamma",
0.01, 10, 1, G_PARAM_READWRITE));
+ g_object_class_install_property(gobject_class, ARG_GAMMA_R,
+ g_param_spec_double("redgamma", "Gamma_r", "gamma value for the red channel",
+ 0.01, 10, 1, G_PARAM_READWRITE));
+ g_object_class_install_property(gobject_class, ARG_GAMMA_G,
+ g_param_spec_double("greengamma", "Gamma_g", "gamma value for the green channel",
+ 0.01, 10, 1, G_PARAM_READWRITE));
+ g_object_class_install_property(gobject_class, ARG_GAMMA_B,
+ g_param_spec_double("bluegamma", "Gamma_b", "gamma value for the blue channel",
+ 0.01, 10, 1, G_PARAM_READWRITE));
gobject_class->set_property = gst_gamma_set_property;
gobject_class->get_property = gst_gamma_get_property;
@@ -166,7 +186,10 @@ gst_gamma_init (GTypeInstance *instance, gpointer g_class)
/* do stuff */
gamma->gamma = 1;
- gst_gamma_calculate_table (gamma);
+ gamma->gamma_r = 1;
+ gamma->gamma_g = 1;
+ gamma->gamma_b = 1;
+ gst_gamma_calculate_tables (gamma);
}
static void
@@ -182,7 +205,19 @@ gst_gamma_set_property (GObject *object, guint prop_id, const GValue *value, GPa
switch (prop_id) {
case ARG_GAMMA:
gamma->gamma = g_value_get_double (value);
- gst_gamma_calculate_table (gamma);
+ gst_gamma_calculate_tables (gamma);
+ break;
+ case ARG_GAMMA_R:
+ gamma->gamma_r = g_value_get_double (value);
+ gst_gamma_calculate_tables (gamma);
+ break;
+ case ARG_GAMMA_G:
+ gamma->gamma_g = g_value_get_double (value);
+ gst_gamma_calculate_tables (gamma);
+ break;
+ case ARG_GAMMA_B:
+ gamma->gamma_b = g_value_get_double (value);
+ gst_gamma_calculate_tables (gamma);
break;
default:
break;
@@ -201,7 +236,15 @@ gst_gamma_get_property (GObject *object, guint prop_id, GValue *value, GParamSpe
switch (prop_id) {
case ARG_GAMMA:
g_value_set_double (value, gamma->gamma);
- gst_gamma_calculate_table (gamma);
+ break;
+ case ARG_GAMMA_R:
+ g_value_set_double (value, gamma->gamma_r);
+ break;
+ case ARG_GAMMA_G:
+ g_value_set_double (value, gamma->gamma_g);
+ break;
+ case ARG_GAMMA_B:
+ g_value_set_double (value, gamma->gamma_b);
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
@@ -243,13 +286,16 @@ static void gst_gamma_setup(GstVideofilter *videofilter)
}
static void
-gst_gamma_calculate_table (GstGamma *gamma)
+gst_gamma_calculate_tables (GstGamma *gamma)
{
int n;
double val;
double exp;
- if (gamma->gamma == 1.0) {
+ if (gamma->gamma == 1.0 &&
+ gamma->gamma_r == 1.0 &&
+ gamma->gamma_g == 1.0 &&
+ gamma->gamma_b == 1.0) {
GST_VIDEOFILTER (gamma)->passthru = TRUE;
return;
}
@@ -262,6 +308,27 @@ gst_gamma_calculate_table (GstGamma *gamma)
val = 255.0 * val;
gamma->gamma_table[n] = (unsigned char) floor(val + 0.5);
}
+ exp = 1.0 / gamma->gamma_r;
+ for (n = 0; n < 256; n++) {
+ val = n/255.0;
+ val = pow(val, exp);
+ val = 255.0 * val;
+ gamma->gamma_table_r[n] = (unsigned char) floor(val + 0.5);
+ }
+ exp = 1.0 / gamma->gamma_g;
+ for (n = 0; n < 256; n++) {
+ val = n/255.0;
+ val = pow(val, exp);
+ val = 255.0 * val;
+ gamma->gamma_table_g[n] = (unsigned char) floor(val + 0.5);
+ }
+ exp = 1.0 / gamma->gamma_b;
+ for (n = 0; n < 256; n++) {
+ val = n/255.0;
+ val = pow(val, exp);
+ val = 255.0 * val;
+ gamma->gamma_table_b[n] = (unsigned char) floor(val + 0.5);
+ }
}
@@ -291,3 +358,67 @@ static void gst_gamma_planar411(GstVideofilter *videofilter,
}
}
+static void gst_gamma_rgb24(GstVideofilter *videofilter, void *dest, void *src)
+{
+ GstGamma *gamma;
+ int i;
+ int width, height;
+ guint8 *csrc = src;
+ guint8 *cdest = dest;
+
+ g_return_if_fail(GST_IS_GAMMA(videofilter));
+ gamma = GST_GAMMA(videofilter);
+
+ width = gst_videofilter_get_input_width(videofilter);
+ height = gst_videofilter_get_input_height(videofilter);
+ if (gamma->gamma == 1.0) {
+ i = 0;
+ while ( i < width * height * 3) {
+ *cdest++ = gamma->gamma_table_r[*csrc++];
+ *cdest++ = gamma->gamma_table_g[*csrc++];
+ *cdest++ = gamma->gamma_table_b[*csrc++];
+ i = i + 3;
+ }
+ } else {
+ i = 0;
+ while (i < width * height * 3) {
+ *cdest++ = gamma->gamma_table[*csrc++];
+ i++;
+ }
+ }
+}
+
+static void gst_gamma_rgb32(GstVideofilter *videofilter, void *dest, void *src)
+{
+ GstGamma *gamma;
+ int i;
+ int width, height;
+ guint8 *csrc = src;
+ guint8 *cdest = dest;
+
+ g_return_if_fail(GST_IS_GAMMA(videofilter));
+ gamma = GST_GAMMA(videofilter);
+
+ width = gst_videofilter_get_input_width(videofilter);
+ height = gst_videofilter_get_input_height(videofilter);
+ if (gamma->gamma == 1.0) {
+ i = 0;
+ while ( i < width * height * 4) {
+ *cdest++ = gamma->gamma_table_b[*csrc++];
+ *cdest++ = gamma->gamma_table_g[*csrc++];
+ *cdest++ = gamma->gamma_table_r[*csrc++];
+ *cdest++; *csrc++;
+ i = i + 4;
+ }
+ } else {
+ i = 0;
+ while (i < width * height * 4) {
+ if ((i % 4) != 3)
+ *cdest++ = gamma->gamma_table[*csrc++];
+ else {
+ *cdest++; *csrc++;
+ }
+ i++;
+ }
+ }
+}
generated by cgit (git 2.34.1) at 2024-11-12 18:03:02 +0000