event_pipe.h: convert to C++

test/read_mixer.cxx

@@ -0,0 +1,158 @@
+/*
+ * Copyright (C) 2003-2011 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"
+
+extern "C" {
+#include "mixer_control.h"
+#include "mixer_list.h"
+#include "filter_registry.h"
+}
+
+#include "pcm_volume.h"
+#include "EventPipe.hxx"
+
+#include <glib.h>
+
+#include <assert.h>
+#include <string.h>
+#include <unistd.h>
+
+#ifdef HAVE_PULSE
+#include "output/pulse_output_plugin.h"
+
+void
+pulse_output_lock(G_GNUC_UNUSED struct pulse_output *po)
+{
+}
+
+void
+pulse_output_unlock(G_GNUC_UNUSED struct pulse_output *po)
+{
+}
+
+void
+pulse_output_set_mixer(G_GNUC_UNUSED struct pulse_output *po,
+		       G_GNUC_UNUSED struct pulse_mixer *pm)
+{
+}
+
+void
+pulse_output_clear_mixer(G_GNUC_UNUSED struct pulse_output *po,
+			 G_GNUC_UNUSED struct pulse_mixer *pm)
+{
+}
+
+bool
+pulse_output_set_volume(G_GNUC_UNUSED struct pulse_output *po,
+			G_GNUC_UNUSED const struct pa_cvolume *volume,
+			G_GNUC_UNUSED GError **error_r)
+{
+	return false;
+}
+
+#endif
+
+#ifdef HAVE_ROAR
+#include "output/roar_output_plugin.h"
+
+int
+roar_output_get_volume(G_GNUC_UNUSED struct roar *roar)
+{
+	return -1;
+}
+
+bool
+roar_output_set_volume(G_GNUC_UNUSED struct roar *roar,
+		       G_GNUC_UNUSED unsigned volume)
+{
+	return true;
+}
+
+#endif
+
+void
+event_pipe_emit(G_GNUC_UNUSED enum pipe_event event)
+{
+}
+
+const struct filter_plugin *
+filter_plugin_by_name(G_GNUC_UNUSED const char *name)
+{
+	assert(false);
+	return NULL;
+}
+
+bool
+pcm_volume(G_GNUC_UNUSED void *buffer, G_GNUC_UNUSED size_t length,
+	   G_GNUC_UNUSED enum sample_format format,
+	   G_GNUC_UNUSED int volume)
+{
+	assert(false);
+	return false;
+}
+
+int main(int argc, G_GNUC_UNUSED char **argv)
+{
+	GError *error = NULL;
+	struct mixer *mixer;
+	bool success;
+	int volume;
+
+	if (argc != 2) {
+		g_printerr("Usage: read_mixer PLUGIN\n");
+		return 1;
+	}
+
+	g_thread_init(NULL);
+
+	mixer = mixer_new(&alsa_mixer_plugin, NULL, NULL, &error);
+	if (mixer == NULL) {
+		g_printerr("mixer_new() failed: %s\n", error->message);
+		g_error_free(error);
+		return 2;
+	}
+
+	success = mixer_open(mixer, &error);
+	if (!success) {
+		mixer_free(mixer);
+		g_printerr("failed to open the mixer: %s\n", error->message);
+		g_error_free(error);
+		return 2;
+	}
+
+	volume = mixer_get_volume(mixer, &error);
+	mixer_close(mixer);
+	mixer_free(mixer);
+
+	assert(volume >= -1 && volume <= 100);
+
+	if (volume < 0) {
+		if (error != NULL) {
+			g_printerr("failed to read volume: %s\n",
+				   error->message);
+			g_error_free(error);
+		} else
+			g_printerr("failed to read volume\n");
+		return 2;
+	}
+
+	g_print("%d\n", volume);
+	return 0;
+}