vboot/firmware/lib/include/vboot_audio.h

/* Copyright (c) 2013 The Chromium OS Authors. All rights reserved.
 * Use of this source code is governed by a BSD-style license that can be
 * found in the LICENSE file.
 *
 * Delay/beep functions used in dev-mode kernel selection.
 */

#ifndef VBOOT_REFERENCE_VBOOT_AUDIO_H_
#define VBOOT_REFERENCE_VBOOT_AUDIO_H_

#include "vboot_api.h"

typedef struct VbAudioContext VbAudioContext;

/**
 * Initialization function. Returns context for processing dev-mode delay.
 */
VbAudioContext *VbAudioOpen(VbCommonParams *cparams);

/**
 * Caller should loop without extra delay until this returns false.
 */
int VbAudioLooping(VbAudioContext *audio);

/**
 * Caller should call this prior to booting.
 */
void VbAudioClose(VbAudioContext *audio);

#endif /* VBOOT_REFERENCE_VBOOT_AUDIO_H_ */