Rename mvc-helpers.{c,h} -> gvc-utils.{c,h}

1 files changed, 335 insertions, 0 deletions

diff --git a/mate-volume-control/src/gvc-utils.c b/mate-volume-control/src/gvc-utils.c
new file mode 100644
index 0000000..d45a217
--- /dev/null
+++ b/mate-volume-control/src/gvc-utils.c
@@ -0,0 +1,335 @@
+/* -*- Mode: C; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 8 -*-
+ *
+ * Copyright (C) 2014 Michal Ratajsky <[email protected]>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA.
+ *
+ */
+
+#include "config.h"
+
+#include <glib.h>
+#include <glib/gi18n.h>
+#include <gtk/gtk.h>
+
+#include <libmatemixer/matemixer.h>
+
+#include "gvc-utils.h"
+
+/* libcanberra requires a PulseAudio channel name to be given to its
+ * CA_PROP_CANBERRA_FORCE_CHANNEL property.
+ *
+ * The strings here are copied from PulseAudio source code to avoid depending
+ * on libpulse. */
+static const gchar *pulse_position[MATE_MIXER_CHANNEL_MAX] = {
+        [MATE_MIXER_CHANNEL_MONO] = "mono",
+        [MATE_MIXER_CHANNEL_FRONT_LEFT] = "front-left",
+        [MATE_MIXER_CHANNEL_FRONT_RIGHT] = "front-right",
+        [MATE_MIXER_CHANNEL_FRONT_CENTER] = "front-center",
+        [MATE_MIXER_CHANNEL_LFE] = "lfe",
+        [MATE_MIXER_CHANNEL_BACK_LEFT] = "rear-left",
+        [MATE_MIXER_CHANNEL_BACK_RIGHT] = "rear-right",
+        [MATE_MIXER_CHANNEL_BACK_CENTER] = "rear-center",
+        [MATE_MIXER_CHANNEL_FRONT_LEFT_CENTER] = "front-left-of-center",
+        [MATE_MIXER_CHANNEL_FRONT_RIGHT_CENTER] = "front-right-of-center",
+        [MATE_MIXER_CHANNEL_SIDE_LEFT] = "side-left",
+        [MATE_MIXER_CHANNEL_SIDE_RIGHT] = "side-right",
+        [MATE_MIXER_CHANNEL_TOP_FRONT_LEFT] = "top-front-left",
+        [MATE_MIXER_CHANNEL_TOP_FRONT_RIGHT] = "top-front-right",
+        [MATE_MIXER_CHANNEL_TOP_FRONT_CENTER] = "top-front-center",
+        [MATE_MIXER_CHANNEL_TOP_CENTER] = "top-center",
+        [MATE_MIXER_CHANNEL_TOP_BACK_LEFT] = "top-rear-left",
+        [MATE_MIXER_CHANNEL_TOP_BACK_RIGHT] = "top-rear-right",
+        [MATE_MIXER_CHANNEL_TOP_BACK_CENTER] = "top-rear-center"
+};
+
+static const gchar *pretty_position[MATE_MIXER_CHANNEL_MAX] = {
+        [MATE_MIXER_CHANNEL_UNKNOWN] = N_("Unknown"),
+        /* Speaker channel names */
+        [MATE_MIXER_CHANNEL_MONO] = N_("Mono"),
+        [MATE_MIXER_CHANNEL_FRONT_LEFT] = N_("Front Left"),
+        [MATE_MIXER_CHANNEL_FRONT_RIGHT] = N_("Front Right"),
+        [MATE_MIXER_CHANNEL_FRONT_CENTER] = N_("Front Center"),
+        [MATE_MIXER_CHANNEL_LFE] = N_("LFE"),
+        [MATE_MIXER_CHANNEL_BACK_LEFT] = N_("Rear Left"),
+        [MATE_MIXER_CHANNEL_BACK_RIGHT] = N_("Rear Right"),
+        [MATE_MIXER_CHANNEL_BACK_CENTER] = N_("Rear Center"),
+        [MATE_MIXER_CHANNEL_FRONT_LEFT_CENTER] = N_("Front Left of Center"),
+        [MATE_MIXER_CHANNEL_FRONT_RIGHT_CENTER] = N_("Front Right of Center"),
+        [MATE_MIXER_CHANNEL_SIDE_LEFT] = N_("Side Left"),
+        [MATE_MIXER_CHANNEL_SIDE_RIGHT] = N_("Side Right"),
+        [MATE_MIXER_CHANNEL_TOP_FRONT_LEFT] = N_("Top Front Left"),
+        [MATE_MIXER_CHANNEL_TOP_FRONT_RIGHT] = N_("Top Front Right"),
+        [MATE_MIXER_CHANNEL_TOP_FRONT_CENTER] = N_("Top Front Center"),
+        [MATE_MIXER_CHANNEL_TOP_CENTER] = N_("Top Center"),
+        [MATE_MIXER_CHANNEL_TOP_BACK_LEFT] = N_("Top Rear Left"),
+        [MATE_MIXER_CHANNEL_TOP_BACK_RIGHT] = N_("Top Rear Right"),
+        [MATE_MIXER_CHANNEL_TOP_BACK_CENTER] = N_("Top Rear Center")
+};
+
+const gchar *
+gvc_channel_position_to_pulse_string (MateMixerChannelPosition position)
+{
+        g_return_val_if_fail (position >= 0 && position < MATE_MIXER_CHANNEL_MAX, NULL);
+
+        return pulse_position[position];
+}
+
+const gchar *
+gvc_channel_position_to_pretty_string (MateMixerChannelPosition position)
+{
+        g_return_val_if_fail (position >= 0 && position < MATE_MIXER_CHANNEL_MAX, NULL);
+
+        return pretty_position[position];
+}
+
+const gchar *
+gvc_channel_map_to_pretty_string (MateMixerStreamControl *control)
+{
+        g_return_val_if_fail (MATE_MIXER_IS_STREAM_CONTROL (control), NULL);
+
+#define HAS_POSITION(p) (mate_mixer_stream_control_has_channel_position (control, (p)))
+
+        /* Modeled after PulseAudio 5.0, probably could be extended with other combinations */
+        switch (mate_mixer_stream_control_get_num_channels (control)) {
+        case 1:
+                if (HAS_POSITION (MATE_MIXER_CHANNEL_MONO))
+                        return _("Mono");
+                break;
+        case 2:
+                if (HAS_POSITION (MATE_MIXER_CHANNEL_FRONT_LEFT) &&
+                    HAS_POSITION (MATE_MIXER_CHANNEL_FRONT_RIGHT))
+                        return _("Stereo");
+                break;
+        case 4:
+                if (HAS_POSITION (MATE_MIXER_CHANNEL_FRONT_LEFT) &&
+                    HAS_POSITION (MATE_MIXER_CHANNEL_FRONT_RIGHT) &&
+                    HAS_POSITION (MATE_MIXER_CHANNEL_BACK_LEFT) &&
+                    HAS_POSITION (MATE_MIXER_CHANNEL_BACK_RIGHT))
+                        return _("Surround 4.0");
+                break;
+        case 5:
+                if (HAS_POSITION (MATE_MIXER_CHANNEL_FRONT_LEFT) &&
+                    HAS_POSITION (MATE_MIXER_CHANNEL_FRONT_RIGHT) &&
+                    HAS_POSITION (MATE_MIXER_CHANNEL_BACK_LEFT) &&
+                    HAS_POSITION (MATE_MIXER_CHANNEL_BACK_RIGHT))
+                        if (HAS_POSITION (MATE_MIXER_CHANNEL_LFE))
+                                return _("Surround 4.1");
+                        if (HAS_POSITION (MATE_MIXER_CHANNEL_FRONT_CENTER))
+                                return _("Surround 5.0");
+                break;
+        case 6:
+                if (HAS_POSITION (MATE_MIXER_CHANNEL_FRONT_LEFT) &&
+                    HAS_POSITION (MATE_MIXER_CHANNEL_FRONT_RIGHT) &&
+                    HAS_POSITION (MATE_MIXER_CHANNEL_FRONT_CENTER) &&
+                    HAS_POSITION (MATE_MIXER_CHANNEL_BACK_LEFT) &&
+                    HAS_POSITION (MATE_MIXER_CHANNEL_BACK_RIGHT) &&
+                    HAS_POSITION (MATE_MIXER_CHANNEL_LFE))
+                        return _("Surround 5.1");
+                break;
+        case 8:
+                if (HAS_POSITION (MATE_MIXER_CHANNEL_FRONT_LEFT) &&
+                    HAS_POSITION (MATE_MIXER_CHANNEL_FRONT_RIGHT) &&
+                    HAS_POSITION (MATE_MIXER_CHANNEL_FRONT_CENTER) &&
+                    HAS_POSITION (MATE_MIXER_CHANNEL_BACK_LEFT) &&
+                    HAS_POSITION (MATE_MIXER_CHANNEL_BACK_RIGHT) &&
+                    HAS_POSITION (MATE_MIXER_CHANNEL_SIDE_LEFT) &&
+                    HAS_POSITION (MATE_MIXER_CHANNEL_SIDE_RIGHT) &&
+                    HAS_POSITION (MATE_MIXER_CHANNEL_LFE))
+                        return _("Surround 7.1");
+                break;
+        }
+
+#undef HAS_POSITION
+
+        return NULL;
+}
+
+#if GTK_CHECK_VERSION (3, 0, 0)
+/* Taken from gtkstyle.c */
+static void rgb_to_hls (gdouble *r, gdouble *g, gdouble *b);
+static void hls_to_rgb (gdouble *h, gdouble *l, gdouble *s);
+
+void
+gvc_color_shade (GdkRGBA *a, GdkRGBA *b, gdouble k)
+{
+        gdouble red;
+        gdouble green;
+        gdouble blue;
+
+        red = (gdouble) a->red / 65535.0;
+        green = (gdouble) a->green / 65535.0;
+        blue = (gdouble) a->blue / 65535.0;
+
+        rgb_to_hls (&red, &green, &blue);
+
+        green *= k;
+        if (green > 1.0)
+                green = 1.0;
+        else if (green < 0.0)
+                green = 0.0;
+
+        blue *= k;
+        if (blue > 1.0)
+                blue = 1.0;
+        else if (blue < 0.0)
+                blue = 0.0;
+
+        hls_to_rgb (&red, &green, &blue);
+
+        b->red = red * 65535.0;
+        b->green = green * 65535.0;
+        b->blue = blue * 65535.0;
+}
+
+static void
+rgb_to_hls (gdouble *r, gdouble *g, gdouble *b)
+{
+        gdouble min;
+        gdouble max;
+        gdouble red;
+        gdouble green;
+        gdouble blue;
+        gdouble h, l, s;
+        gdouble delta;
+
+        red = *r;
+        green = *g;
+        blue = *b;
+
+        if (red > green) {
+                if (red > blue)
+                        max = red;
+                else
+                        max = blue;
+
+                if (green < blue)
+                        min = green;
+                else
+                        min = blue;
+        } else {
+                if (green > blue)
+                        max = green;
+                else
+                        max = blue;
+
+                if (red < blue)
+                        min = red;
+                else
+                        min = blue;
+        }
+
+        l = (max + min) / 2;
+        s = 0;
+        h = 0;
+
+        if (max != min) {
+                if (l <= 0.5)
+                        s = (max - min) / (max + min);
+                else
+                        s = (max - min) / (2 - max - min);
+
+                delta = max - min;
+                if (red == max)
+                        h = (green - blue) / delta;
+                else if (green == max)
+                        h = 2 + (blue - red) / delta;
+                else if (blue == max)
+                        h = 4 + (red - green) / delta;
+
+                h *= 60;
+                if (h < 0.0)
+                        h += 360;
+        }
+
+        *r = h;
+        *g = l;
+        *b = s;
+}
+
+static void
+hls_to_rgb (gdouble *h, gdouble *l, gdouble *s)
+{
+        gdouble hue;
+        gdouble lightness;
+        gdouble saturation;
+        gdouble m1, m2;
+        gdouble r, g, b;
+
+        lightness = *l;
+        saturation = *s;
+
+        if (lightness <= 0.5)
+                m2 = lightness * (1 + saturation);
+        else
+                m2 = lightness + saturation - lightness * saturation;
+        m1 = 2 * lightness - m2;
+
+        if (saturation == 0) {
+                *h = lightness;
+                *l = lightness;
+                *s = lightness;
+        } else {
+                hue = *h + 120;
+                while (hue > 360)
+                        hue -= 360;
+                while (hue < 0)
+                        hue += 360;
+
+                if (hue < 60)
+                        r = m1 + (m2 - m1) * hue / 60;
+                else if (hue < 180)
+                        r = m2;
+                else if (hue < 240)
+                        r = m1 + (m2 - m1) * (240 - hue) / 60;
+                else
+                        r = m1;
+
+                hue = *h;
+                while (hue > 360)
+                        hue -= 360;
+                while (hue < 0)
+                        hue += 360;
+
+                if (hue < 60)
+                        g = m1 + (m2 - m1) * hue / 60;
+                else if (hue < 180)
+                        g = m2;
+                else if (hue < 240)
+                        g = m1 + (m2 - m1) * (240 - hue) / 60;
+                else
+                        g = m1;
+
+                hue = *h - 120;
+                while (hue > 360)
+                        hue -= 360;
+                while (hue < 0)
+                        hue += 360;
+
+                if (hue < 60)
+                        b = m1 + (m2 - m1) * hue / 60;
+                else if (hue < 180)
+                        b = m2;
+                else if (hue < 240)
+                        b = m1 + (m2 - m1) * (240 - hue) / 60;
+                else
+                        b = m1;
+
+                *h = r;
+                *l = g;
+                *s = b;
+        }
+}
+#endif