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-rw-r--r--src/mixer/winmm_mixer_plugin.c114
1 files changed, 114 insertions, 0 deletions
diff --git a/src/mixer/winmm_mixer_plugin.c b/src/mixer/winmm_mixer_plugin.c
new file mode 100644
index 000000000..5ab3e7525
--- /dev/null
+++ b/src/mixer/winmm_mixer_plugin.c
@@ -0,0 +1,114 @@
+/*
+ * Copyright (C) 2003-2010 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 "mixer_api.h"
+#include "output_api.h"
+#include "output/winmm_output_plugin.h"
+
+#include <assert.h>
+#include <math.h>
+#include <windows.h>
+
+#undef G_LOG_DOMAIN
+#define G_LOG_DOMAIN "winmm_mixer"
+
+struct winmm_mixer {
+ struct mixer base;
+ struct winmm_output *output;
+};
+
+static inline GQuark
+winmm_mixer_quark(void)
+{
+ return g_quark_from_static_string("winmm_mixer");
+}
+
+static inline int
+winmm_volume_decode(DWORD volume)
+{
+ return lround((volume & 0xFFFF) / 655.35);
+}
+
+static inline DWORD
+winmm_volume_encode(int volume)
+{
+ int value = lround(volume * 655.35);
+ return MAKELONG(value, value);
+}
+
+static struct mixer *
+winmm_mixer_init(void *ao, G_GNUC_UNUSED const struct config_param *param,
+ G_GNUC_UNUSED GError **error_r)
+{
+ assert(ao != NULL);
+
+ struct winmm_mixer *wm = g_new(struct winmm_mixer, 1);
+ mixer_init(&wm->base, &winmm_mixer_plugin);
+ wm->output = (struct winmm_output *) ao;
+
+ return &wm->base;
+}
+
+static void
+winmm_mixer_finish(struct mixer *data)
+{
+ g_free(data);
+}
+
+static int
+winmm_mixer_get_volume(struct mixer *mixer, GError **error_r)
+{
+ struct winmm_mixer *wm = (struct winmm_mixer *) mixer;
+ DWORD volume;
+ HWAVEOUT handle = winmm_output_get_handle(wm->output);
+ MMRESULT result = waveOutGetVolume(handle, &volume);
+
+ if (result != MMSYSERR_NOERROR) {
+ g_set_error(error_r, 0, winmm_mixer_quark(),
+ "Failed to get winmm volume");
+ return -1;
+ }
+
+ return winmm_volume_decode(volume);
+}
+
+static bool
+winmm_mixer_set_volume(struct mixer *mixer, unsigned volume, GError **error_r)
+{
+ struct winmm_mixer *wm = (struct winmm_mixer *) mixer;
+ DWORD value = winmm_volume_encode(volume);
+ HWAVEOUT handle = winmm_output_get_handle(wm->output);
+ MMRESULT result = waveOutSetVolume(handle, value);
+
+ if (result != MMSYSERR_NOERROR) {
+ g_set_error(error_r, 0, winmm_mixer_quark(),
+ "Failed to set winmm volume");
+ return false;
+ }
+
+ return true;
+}
+
+const struct mixer_plugin winmm_mixer_plugin = {
+ .init = winmm_mixer_init,
+ .finish = winmm_mixer_finish,
+ .get_volume = winmm_mixer_get_volume,
+ .set_volume = winmm_mixer_set_volume,
+};