[client] windows: add WASAPI audio support

client/audiodevs/WASAPI/format.h

@@ -0,0 +1,65 @@
+/**
+ * Looking Glass
+ * Copyright © 2017-2026 The Looking Glass Authors
+ * https://looking-glass.io
+ *
+ * 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., 59
+ * Temple Place, Suite 330, Boston, MA 02111-1307 USA
+ */
+
+#ifndef _H_LG_WASAPI_FORMAT_
+#define _H_LG_WASAPI_FORMAT_
+
+#include "interface/audio.h"
+
+#include <stdint.h>
+
+typedef enum WasapiSampleType
+{
+  WASAPI_SAMPLE_TYPE_PCM,
+  WASAPI_SAMPLE_TYPE_FLOAT
+}
+WasapiSampleType;
+
+typedef struct WasapiFormatInfo
+{
+  uint16_t         blockAlign;
+  uint32_t         bytesPerSecond;
+  uint16_t         bitsPerSample;
+  uint32_t         channelMask;
+  WasapiSampleType sampleType;
+}
+WasapiFormatInfo;
+
+typedef struct WasapiControlPending
+{
+  bool volume;
+  bool mute;
+}
+WasapiControlPending;
+
+void                 wasapi_controlPendingReset (WasapiControlPending * state);
+WasapiControlPending wasapi_controlPendingTake  (WasapiControlPending * state);
+
+int      wasapi_sampleSize                 (LG_AudioSampleFormat format);
+uint32_t wasapi_channelMask                (const LG_AudioFormat * format);
+bool     wasapi_formatInfo                 (const LG_AudioFormat * format,
+    WasapiFormatInfo * info);
+uint64_t wasapi_framesToDuration           (uint32_t frames,
+    uint32_t sampleRate);
+uint32_t wasapi_availableFrames            (uint32_t bufferFrames,
+    uint32_t paddingFrames);
+uint8_t  wasapi_silenceByte                (LG_AudioSampleFormat format);
+
+#endif