/***************************************************************************** levelmeters.c - Stereo level meters Copyright (C) 2000 by Jaroslav Kysela 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 Street, Fifth Floor, Boston, MA 02110-1301 USA ******************************************************************************/ #include "envy24control.h" static GdkRGBA *penGreenShadow = NULL; static GdkRGBA *penGreenLight = NULL; static GdkRGBA *penOrangeShadow = NULL; static GdkRGBA *penOrangeLight = NULL; static GdkRGBA *penRedShadow = NULL; static GdkRGBA *penRedLight = NULL; static snd_ctl_elem_value_t *peaks; extern int input_channels, output_channels, pcm_output_channels, spdif_channels, view_spdif_playback; static void update_peak_switch(void) { int err; if ((err = snd_ctl_elem_read(ctl, peaks)) < 0) g_print("Unable to read peaks: %s\n", snd_strerror(err)); } static void get_levels(int idx, int *l1, int *l2) { *l1 = *l2 = 0; if (idx == 0) { *l1 = snd_ctl_elem_value_get_integer(peaks, 20); *l2 = snd_ctl_elem_value_get_integer(peaks, 21); } else { *l1 = *l2 = snd_ctl_elem_value_get_integer(peaks, idx - 1); } } static GdkRGBA *get_pen(int nRed, int nGreen, int nBlue) { GdkRGBA *c; c = (GdkRGBA *)g_malloc(sizeof(GdkRGBA)); c->red = nRed / 65535.0; c->green = nGreen / 65535.0; c->blue = nBlue / 65535.0; c->alpha = 1.0; return c; } static int get_index(const gchar *name) { int result; if (!strcmp(name, "DigitalMixer")) return 0; result = atoi(name + 5); if (result < 1 || result > 20) { g_print("Wrong drawing area ID: %s\n", name); exit(EXIT_FAILURE); } return result; } static void redraw_meters(int idx, int width, int height, int level1, int level2, GtkSnapshot *snapshot) { int stereo = idx == 0; int segment_width = stereo ? (width / 2) - 8 : width - 12; int segments = (height - 6) / 4; int green_segments = (segments / 4) * 3; int red_segments = 2; int orange_segments = segments - green_segments - red_segments; int seg; int segs_on1 = ((segments * level1) + 128) / 255; int segs_on2 = ((segments * level2) + 128) / 255; GdkRGBA black = { 0, 0, 0, 1 }; // g_print("segs_on1 = %i (%i), segs_on2 = %i (%i)\n", segs_on1, level1, segs_on2, level2); gtk_snapshot_append_color(snapshot, &black, &GRAPHENE_RECT_INIT(0, 0, width, height)); for (seg = 0; seg < green_segments; seg++) { gtk_snapshot_append_color(snapshot, segs_on1 > 0 ? penGreenLight : penGreenShadow, &GRAPHENE_RECT_INIT( 6, 3 + ((segments - seg - 1) * 4), segment_width, 3)); if (stereo) { gtk_snapshot_append_color(snapshot, segs_on2 > 0 ? penGreenLight : penGreenShadow, &GRAPHENE_RECT_INIT( 2 + (width / 2), 3 + ((segments - seg - 1) * 4), segment_width, 3)); } segs_on1--; segs_on2--; } for (; seg < green_segments + orange_segments; seg++) { gtk_snapshot_append_color(snapshot, segs_on1 > 0 ? penOrangeLight : penOrangeShadow, &GRAPHENE_RECT_INIT( 6, 3 + ((segments - seg - 1) * 4), segment_width, 3)); if (stereo) { gtk_snapshot_append_color(snapshot, segs_on2 > 0 ? penOrangeLight : penOrangeShadow, &GRAPHENE_RECT_INIT( 2 + (width / 2), 3 + ((segments - seg - 1) * 4), segment_width, 3)); } segs_on1--; segs_on2--; } for (; seg < segments; seg++) { gtk_snapshot_append_color(snapshot, segs_on1 > 0 ? penRedLight : penRedShadow, &GRAPHENE_RECT_INIT( 6, 3 + ((segments - seg - 1) * 4), segment_width, 3)); if (stereo) { gtk_snapshot_append_color(snapshot, segs_on2 > 0 ? penRedLight : penRedShadow, &GRAPHENE_RECT_INIT( 2 + (width / 2), 3 + ((segments - seg - 1) * 4), segment_width, 3)); } segs_on1--; segs_on2--; } } #define ENVY_TYPE_LEVEL_METER envy_level_meter_get_type() G_DECLARE_FINAL_TYPE(EnvyLevelMeter, envy_level_meter, ENVY, LEVEL_METER, GtkWidget) struct _EnvyLevelMeter { GtkWidget parent_instance; }; G_DEFINE_FINAL_TYPE(EnvyLevelMeter, envy_level_meter, GTK_TYPE_WIDGET) static void envy_level_meter_snapshot(GtkWidget *widget, GtkSnapshot *snapshot) { int idx = get_index(gtk_widget_get_name(widget)); int l1, l2; get_levels(idx, &l1, &l2); redraw_meters(idx, gtk_widget_get_width(widget), gtk_widget_get_height(widget), l1, l2, snapshot); } static void envy_level_meter_class_init(EnvyLevelMeterClass *klass) { GtkWidgetClass *widget_class = GTK_WIDGET_CLASS(klass); widget_class->snapshot = envy_level_meter_snapshot; } static void envy_level_meter_init(EnvyLevelMeter *self) { } GtkWidget *envy_level_meter_new(void) { EnvyLevelMeter *self = g_object_new(ENVY_TYPE_LEVEL_METER, NULL); return GTK_WIDGET(self); } static void update_meter(int idx) { GtkWidget *widget = idx == 0 ? mixer_mix_drawing : mixer_drawing[idx-1]; gtk_widget_queue_draw(widget); } gint level_meters_timeout_callback(gpointer data) { int idx; update_peak_switch(); for (idx = 0; idx <= pcm_output_channels; idx++) { update_meter(idx); } if (view_spdif_playback) { for (idx = MAX_PCM_OUTPUT_CHANNELS + 1; idx <= MAX_OUTPUT_CHANNELS + spdif_channels; idx++) { update_meter(idx); } } for (idx = MAX_PCM_OUTPUT_CHANNELS + MAX_SPDIF_CHANNELS + 1; idx <= input_channels + MAX_PCM_OUTPUT_CHANNELS + MAX_SPDIF_CHANNELS; idx++) { update_meter(idx); } for (idx = MAX_PCM_OUTPUT_CHANNELS + MAX_SPDIF_CHANNELS + MAX_INPUT_CHANNELS + 1; \ idx <= spdif_channels + MAX_PCM_OUTPUT_CHANNELS + MAX_SPDIF_CHANNELS + MAX_INPUT_CHANNELS; idx++) { update_meter(idx); } return TRUE; } void level_meters_reset_peaks(GtkButton *button, gpointer data) { } void level_meters_init(void) { int err; snd_ctl_elem_value_malloc(&peaks); snd_ctl_elem_value_set_interface(peaks, SND_CTL_ELEM_IFACE_PCM); snd_ctl_elem_value_set_name(peaks, "Multi Track Peak"); if ((err = snd_ctl_elem_read(ctl, peaks)) < 0) /* older ALSA driver, using MIXER type */ snd_ctl_elem_value_set_interface(peaks, SND_CTL_ELEM_IFACE_MIXER); penGreenShadow = get_pen(0, 0x77ff, 0); penGreenLight = get_pen(0, 0xffff, 0); penOrangeShadow = get_pen(0xddff, 0x55ff, 0); penOrangeLight = get_pen(0xffff, 0x99ff, 0); penRedShadow = get_pen(0xaaff, 0, 0); penRedLight = get_pen(0xffff, 0, 0); } void level_meters_postinit(void) { level_meters_timeout_callback(NULL); }