From b87fc6b140772ba3017de311c7063c259424264c Mon Sep 17 00:00:00 2001
From: Alex <kavsrf@gmail.com>
Date: Mon, 15 Aug 2016 17:11:31 +0200
Subject: First public release. Used by VeraCrypt 1.18.

---
 Library/CommonLib/EfiBeep.c | 69 +++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 69 insertions(+)
 create mode 100644 Library/CommonLib/EfiBeep.c

(limited to 'Library/CommonLib/EfiBeep.c')

diff --git a/Library/CommonLib/EfiBeep.c b/Library/CommonLib/EfiBeep.c
new file mode 100644
index 0000000..2522078
--- /dev/null
+++ b/Library/CommonLib/EfiBeep.c
@@ -0,0 +1,69 @@
+/** @file
+EFI speaker beep helpers routines/wrappers
+
+Copyright (c) 2016. Disk Cryptography Services for EFI (DCS), Alex Kolotnikov
+Copyright (c) 2016. VeraCrypt, Mounir IDRASSI 
+
+This program and the accompanying materials are licensed and made available
+under the terms and conditions of the GNU Lesser General Public License, version 3.0 (LGPL-3.0).
+
+The full text of the license may be found at
+https://opensource.org/licenses/LGPL-3.0
+**/
+
+#include <Library/CommonLib.h>
+#include <Library/UefiBootServicesTableLib.h>
+#include <Protocol/Speaker.h>
+
+//////////////////////////////////////////////////////////////////////////
+// Beep
+//////////////////////////////////////////////////////////////////////////
+EFI_HANDLE*                gSpeakerHandles = NULL;
+UINTN                      gSpeakerCount = 0;
+EFI_SPEAKER_IF_PROTOCOL*	gSpeaker = NULL;
+EFI_GUID                   gSpeakerGuid = EFI_SPEAKER_INTERFACE_PROTOCOL_GUID;
+
+// Beep defaults
+int gBeepEnabled = 1;
+BOOLEAN	gBeepControlEnabled = 1;
+int gBeepDevice = -1;
+int gBeepNumberDefault = 1;
+int gBeepDurationDefault = 100;
+int gBeepIntervalDefault = 0;
+int gBeepToneDefault = 0x500;
+
+EFI_STATUS
+InitSpeaker() {
+	EFI_STATUS	res;
+	// Init Console control if supported
+	res = EfiGetHandles(ByProtocol, &gSpeakerGuid, 0, &gSpeakerHandles, &gSpeakerCount);
+	if (gSpeakerCount > 0) {
+		return SpeakerSelect(gSpeakerCount - 1);
+	}
+	return res;
+}
+
+EFI_STATUS
+SpeakerSelect(
+	IN UINTN index) {
+	if (index < gSpeakerCount) {
+		return gBS->HandleProtocol(gSpeakerHandles[index], &gSpeakerGuid, (VOID**)&gSpeaker);
+	}
+	return EFI_NOT_FOUND;
+}
+
+EFI_STATUS
+SpeakerBeep(
+	IN UINT16  Tone,
+	IN UINTN   NumberOfBeeps,
+	IN UINTN   Duration,
+	IN UINTN   Interval
+	)
+{
+	if (gSpeaker != NULL) {
+		gSpeaker->SetSpeakerToneFrequency(gSpeaker, Tone);
+		return gSpeaker->GenerateBeep(gSpeaker, NumberOfBeeps, Duration, Interval);
+	}
+	return EFI_UNSUPPORTED;
+}
+
-- 
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