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243 lines
6.9 KiB
C
243 lines
6.9 KiB
C
/*****************************************************************************
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levelmeters.c - Stereo level meters
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Copyright (C) 2000 by Jaroslav Kysela <perex@perex.cz>
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This program is free software; you can redistribute it and/or
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modify it under the terms of the GNU General Public License
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as published by the Free Software Foundation; either version 2
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of the License, or (at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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******************************************************************************/
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#include "envy24control.h"
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static GdkRGBA *penGreenShadow = NULL;
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static GdkRGBA *penGreenLight = NULL;
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static GdkRGBA *penOrangeShadow = NULL;
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static GdkRGBA *penOrangeLight = NULL;
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static GdkRGBA *penRedShadow = NULL;
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static GdkRGBA *penRedLight = NULL;
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static snd_ctl_elem_value_t *peaks;
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extern int input_channels, output_channels, pcm_output_channels, spdif_channels, view_spdif_playback;
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static void update_peak_switch(void)
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{
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int err;
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if ((err = snd_ctl_elem_read(ctl, peaks)) < 0)
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g_print("Unable to read peaks: %s\n", snd_strerror(err));
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}
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static void get_levels(int idx, int *l1, int *l2)
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{
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*l1 = *l2 = 0;
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if (idx == 0) {
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*l1 = snd_ctl_elem_value_get_integer(peaks, 20);
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*l2 = snd_ctl_elem_value_get_integer(peaks, 21);
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} else {
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*l1 = *l2 = snd_ctl_elem_value_get_integer(peaks, idx - 1);
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}
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}
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static GdkRGBA *get_pen(int nRed, int nGreen, int nBlue)
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{
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GdkRGBA *c;
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c = (GdkRGBA *)g_malloc(sizeof(GdkRGBA));
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c->red = nRed / 65535.0;
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c->green = nGreen / 65535.0;
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c->blue = nBlue / 65535.0;
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c->alpha = 1.0;
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return c;
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}
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static int get_index(const gchar *name)
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{
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int result;
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if (!strcmp(name, "DigitalMixer"))
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return 0;
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result = atoi(name + 5);
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if (result < 1 || result > 20) {
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g_print("Wrong drawing area ID: %s\n", name);
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exit(EXIT_FAILURE);
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}
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return result;
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}
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static void redraw_meters(int idx, int width, int height, int level1, int level2, GtkSnapshot *snapshot)
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{
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int stereo = idx == 0;
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int segment_width = stereo ? (width / 2) - 8 : width - 12;
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int segments = (height - 6) / 4;
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int green_segments = (segments / 4) * 3;
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int red_segments = 2;
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int orange_segments = segments - green_segments - red_segments;
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int seg;
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int segs_on1 = ((segments * level1) + 128) / 255;
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int segs_on2 = ((segments * level2) + 128) / 255;
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GdkRGBA black = { 0, 0, 0, 1 };
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// g_print("segs_on1 = %i (%i), segs_on2 = %i (%i)\n", segs_on1, level1, segs_on2, level2);
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gtk_snapshot_append_color(snapshot, &black, &GRAPHENE_RECT_INIT(0, 0, width, height));
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for (seg = 0; seg < green_segments; seg++) {
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gtk_snapshot_append_color(snapshot,
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segs_on1 > 0 ? penGreenLight : penGreenShadow,
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&GRAPHENE_RECT_INIT(
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6, 3 + ((segments - seg - 1) * 4),
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segment_width,
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3));
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if (stereo) {
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gtk_snapshot_append_color(snapshot,
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segs_on2 > 0 ? penGreenLight : penGreenShadow,
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&GRAPHENE_RECT_INIT(
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2 + (width / 2),
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3 + ((segments - seg - 1) * 4),
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segment_width,
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3));
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}
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segs_on1--;
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segs_on2--;
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}
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for (; seg < green_segments + orange_segments; seg++) {
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gtk_snapshot_append_color(snapshot,
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segs_on1 > 0 ? penOrangeLight : penOrangeShadow,
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&GRAPHENE_RECT_INIT(
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6, 3 + ((segments - seg - 1) * 4),
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segment_width,
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3));
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if (stereo) {
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gtk_snapshot_append_color(snapshot,
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segs_on2 > 0 ? penOrangeLight : penOrangeShadow,
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&GRAPHENE_RECT_INIT(
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2 + (width / 2),
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3 + ((segments - seg - 1) * 4),
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segment_width,
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3));
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}
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segs_on1--;
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segs_on2--;
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}
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for (; seg < segments; seg++) {
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gtk_snapshot_append_color(snapshot,
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segs_on1 > 0 ? penRedLight : penRedShadow,
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&GRAPHENE_RECT_INIT(
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6, 3 + ((segments - seg - 1) * 4),
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segment_width,
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3));
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if (stereo) {
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gtk_snapshot_append_color(snapshot,
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segs_on2 > 0 ? penRedLight : penRedShadow,
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&GRAPHENE_RECT_INIT(
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2 + (width / 2),
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3 + ((segments - seg - 1) * 4),
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segment_width,
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3));
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}
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segs_on1--;
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segs_on2--;
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}
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}
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#define ENVY_TYPE_LEVEL_METER envy_level_meter_get_type()
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G_DECLARE_FINAL_TYPE(EnvyLevelMeter, envy_level_meter, ENVY, LEVEL_METER, GtkWidget)
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struct _EnvyLevelMeter
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{
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GtkWidget parent_instance;
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};
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G_DEFINE_FINAL_TYPE(EnvyLevelMeter, envy_level_meter, GTK_TYPE_WIDGET)
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static void envy_level_meter_snapshot(GtkWidget *widget, GtkSnapshot *snapshot)
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{
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int idx = get_index(gtk_widget_get_name(widget));
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int l1, l2;
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get_levels(idx, &l1, &l2);
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redraw_meters(idx, gtk_widget_get_width(widget), gtk_widget_get_height(widget), l1, l2, snapshot);
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}
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static void envy_level_meter_class_init(EnvyLevelMeterClass *klass)
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{
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GtkWidgetClass *widget_class = GTK_WIDGET_CLASS(klass);
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widget_class->snapshot = envy_level_meter_snapshot;
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}
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static void envy_level_meter_init(EnvyLevelMeter *self)
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{
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}
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GtkWidget *envy_level_meter_new(void)
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{
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EnvyLevelMeter *self = g_object_new(ENVY_TYPE_LEVEL_METER, NULL);
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return GTK_WIDGET(self);
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}
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static void update_meter(int idx)
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{
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GtkWidget *widget = idx == 0 ? mixer_mix_drawing : mixer_drawing[idx-1];
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gtk_widget_queue_draw(widget);
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}
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gint level_meters_timeout_callback(gpointer data)
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{
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int idx;
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update_peak_switch();
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for (idx = 0; idx <= pcm_output_channels; idx++) {
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update_meter(idx);
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}
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if (view_spdif_playback) {
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for (idx = MAX_PCM_OUTPUT_CHANNELS + 1; idx <= MAX_OUTPUT_CHANNELS + spdif_channels; idx++) {
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update_meter(idx);
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}
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}
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for (idx = MAX_PCM_OUTPUT_CHANNELS + MAX_SPDIF_CHANNELS + 1; idx <= input_channels + MAX_PCM_OUTPUT_CHANNELS + MAX_SPDIF_CHANNELS; idx++) {
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update_meter(idx);
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}
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for (idx = MAX_PCM_OUTPUT_CHANNELS + MAX_SPDIF_CHANNELS + MAX_INPUT_CHANNELS + 1; \
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idx <= spdif_channels + MAX_PCM_OUTPUT_CHANNELS + MAX_SPDIF_CHANNELS + MAX_INPUT_CHANNELS; idx++) {
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update_meter(idx);
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}
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return TRUE;
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}
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void level_meters_reset_peaks(GtkButton *button, gpointer data)
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{
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}
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void level_meters_init(void)
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{
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int err;
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snd_ctl_elem_value_malloc(&peaks);
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snd_ctl_elem_value_set_interface(peaks, SND_CTL_ELEM_IFACE_PCM);
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snd_ctl_elem_value_set_name(peaks, "Multi Track Peak");
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if ((err = snd_ctl_elem_read(ctl, peaks)) < 0)
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/* older ALSA driver, using MIXER type */
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snd_ctl_elem_value_set_interface(peaks,
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SND_CTL_ELEM_IFACE_MIXER);
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penGreenShadow = get_pen(0, 0x77ff, 0);
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penGreenLight = get_pen(0, 0xffff, 0);
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penOrangeShadow = get_pen(0xddff, 0x55ff, 0);
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penOrangeLight = get_pen(0xffff, 0x99ff, 0);
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penRedShadow = get_pen(0xaaff, 0, 0);
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penRedLight = get_pen(0xffff, 0, 0);
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}
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void level_meters_postinit(void)
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{
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level_meters_timeout_callback(NULL);
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}
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