mixer_all: convert to C++

1 files changed, 182 insertions, 0 deletions

diff --git a/src/MixerAll.cxx b/src/MixerAll.cxx
new file mode 100644
index 000000000..a214c1e24
--- /dev/null
+++ b/src/MixerAll.cxx
@@ -0,0 +1,182 @@
+/*
+ * Copyright (C) 2003-2013 The Music Player Daemon Project
+ * http://www.musicpd.org
+ *
+ * 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 "config.h"
+#include "MixerAll.hxx"
+#include "pcm_volume.h"
+#include "OutputAll.hxx"
+
+extern "C" {
+#include "mixer_control.h"
+#include "output_internal.h"
+#include "mixer_api.h"
+}
+
+#include <glib.h>
+
+#include <assert.h>
+
+#undef G_LOG_DOMAIN
+#define G_LOG_DOMAIN "mixer"
+
+static int
+output_mixer_get_volume(unsigned i)
+{
+	struct audio_output *output;
+	struct mixer *mixer;
+	int volume;
+	GError *error = NULL;
+
+	assert(i < audio_output_count());
+
+	output = audio_output_get(i);
+	if (!output->enabled)
+		return -1;
+
+	mixer = output->mixer;
+	if (mixer == NULL)
+		return -1;
+
+	volume = mixer_get_volume(mixer, &error);
+	if (volume < 0 && error != NULL) {
+		g_warning("Failed to read mixer for '%s': %s",
+			  output->name, error->message);
+		g_error_free(error);
+	}
+
+	return volume;
+}
+
+int
+mixer_all_get_volume(void)
+{
+	unsigned count = audio_output_count(), ok = 0;
+	int volume, total = 0;
+
+	for (unsigned i = 0; i < count; i++) {
+		volume = output_mixer_get_volume(i);
+		if (volume >= 0) {
+			total += volume;
+			++ok;
+		}
+	}
+
+	if (ok == 0)
+		return -1;
+
+	return total / ok;
+}
+
+static bool
+output_mixer_set_volume(unsigned i, unsigned volume)
+{
+	struct audio_output *output;
+	struct mixer *mixer;
+	bool success;
+	GError *error = NULL;
+
+	assert(i < audio_output_count());
+	assert(volume <= 100);
+
+	output = audio_output_get(i);
+	if (!output->enabled)
+		return false;
+
+	mixer = output->mixer;
+	if (mixer == NULL)
+		return false;
+
+	success = mixer_set_volume(mixer, volume, &error);
+	if (!success && error != NULL) {
+		g_warning("Failed to set mixer for '%s': %s",
+			  output->name, error->message);
+		g_error_free(error);
+	}
+
+	return success;
+}
+
+bool
+mixer_all_set_volume(unsigned volume)
+{
+	bool success = false;
+	unsigned count = audio_output_count();
+
+	assert(volume <= 100);
+
+	for (unsigned i = 0; i < count; i++)
+		success = output_mixer_set_volume(i, volume)
+			|| success;
+
+	return success;
+}
+
+static int
+output_mixer_get_software_volume(unsigned i)
+{
+	struct audio_output *output;
+	struct mixer *mixer;
+
+	assert(i < audio_output_count());
+
+	output = audio_output_get(i);
+	if (!output->enabled)
+		return -1;
+
+	mixer = output->mixer;
+	if (mixer == NULL || mixer->plugin != &software_mixer_plugin)
+		return -1;
+
+	return mixer_get_volume(mixer, NULL);
+}
+
+int
+mixer_all_get_software_volume(void)
+{
+	unsigned count = audio_output_count(), ok = 0;
+	int volume, total = 0;
+
+	for (unsigned i = 0; i < count; i++) {
+		volume = output_mixer_get_software_volume(i);
+		if (volume >= 0) {
+			total += volume;
+			++ok;
+		}
+	}
+
+	if (ok == 0)
+		return -1;
+
+	return total / ok;
+}
+
+void
+mixer_all_set_software_volume(unsigned volume)
+{
+	unsigned count = audio_output_count();
+
+	assert(volume <= PCM_VOLUME_1);
+
+	for (unsigned i = 0; i < count; i++) {
+		struct audio_output *output = audio_output_get(i);
+		if (output->mixer != NULL &&
+		    output->mixer->plugin == &software_mixer_plugin)
+			mixer_set_volume(output->mixer, volume, NULL);
+	}
+}