JDK14/Java14源码在线阅读

/*
 * Copyright (c) 2002, 2007, Oracle and/or its affiliates. All rights reserved.
 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
 *
 * This code is free software; you can redistribute it and/or modify it
 * under the terms of the GNU General Public License version 2 only, as
 * published by the Free Software Foundation.  Oracle designates this
 * particular file as subject to the "Classpath" exception as provided
 * by Oracle in the LICENSE file that accompanied this code.
 *
 * This code 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
 * version 2 for more details (a copy is included in the LICENSE file that
 * accompanied this code).
 *
 * You should have received a copy of the GNU General Public License version
 * 2 along with this work; if not, write to the Free Software Foundation,
 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
 *
 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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#ifndef DIRECT_AUDIO_INCLUDED
#define DIRECT_AUDIO_INCLUDED

// includes for types
#include "SoundDefs.h"

// for memset
#include <string.h>

#include "Utilities.h"

// the following defines should match the ones in AbstractMixer.java
#define DAUDIO_PCM  0
#define DAUDIO_ULAW 1
#define DAUDIO_ALAW 2

#define DAUDIO_STRING_LENGTH 200

typedef struct tag_DirectAudioDeviceDescription {
    // optional deviceID (complementary to deviceIndex)
    INT32 deviceID;
    INT32 maxSimulLines;
    char name[DAUDIO_STRING_LENGTH+1];
    char vendor[DAUDIO_STRING_LENGTH+1];
    char description[DAUDIO_STRING_LENGTH+1];
    char version[DAUDIO_STRING_LENGTH+1];
} DirectAudioDeviceDescription;


// method definitions

#if (USE_DAUDIO == TRUE)

// callback from GetFormats, implemented in DirectAudioDevice.c
void DAUDIO_AddAudioFormat(void* creator, int significantBits, int frameSizeInBytes,
                           int channels, float sampleRate,
                           int encoding, int isSigned,
                           int bigEndian);


// the following methods need to be implemented by the platform dependent code

/* returns the number of mixer devices */
INT32 DAUDIO_GetDirectAudioDeviceCount();

/* returns TRUE on success, FALSE otherwise */
INT32 DAUDIO_GetDirectAudioDeviceDescription(INT32 mixerIndex,
                                             DirectAudioDeviceDescription* description);

// SourceDataLine and TargetDataLine

void DAUDIO_GetFormats(INT32 mixerIndex, INT32 deviceID, int isSource, void* creator);

void* DAUDIO_Open(INT32 mixerIndex, INT32 deviceID, int isSource,
                  int encoding, float sampleRate, int sampleSizeInBits,
                  int frameSize, int channels,
                  int isSigned, int isBigEndian, int bufferSizeInBytes);
int DAUDIO_Start(void* id, int isSource);
int DAUDIO_Stop(void* id, int isSource);
void DAUDIO_Close(void* id, int isSource);
int DAUDIO_Write(void* id, char* data, int byteSize); // returns -1 on error
int DAUDIO_Read(void* id, char* data, int byteSize);  // returns -1 on error

int DAUDIO_GetBufferSize(void* id, int isSource);
int DAUDIO_StillDraining(void* id, int isSource);

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