audio.h

来自「嵌入式linux系统的网络编程（C＋＋） 在ARM上实现视频会议 此程序获得」· C头文件 代码 · 共 57 行

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// FileName:	audio.h
// Author:		b1gm0use
// Project:		myvideo

#ifndef _AUDIO_H_
#define _AUDIO_H_

#include <qevent.h>
#include <linux/soundcard.h>

// 自定义事件号
const int AUDIO_EVENT = QEvent::User+100;
const char * const DEFAULT_AUDIO_DEVICE = "/dev/dsp";

// 存储次数
const int LENGTH = 9;

// 采样频率
const int RATE = 48000;

// 量化位数
const int SIZE = AFMT_S16_LE;

// 声道数目
const int CHANNELS = 2;

// 30ms原声音数据
const int BUFF_SIZE = RATE * 2 * CHANNELS * 30 / 1000;

const unsigned int BUFF_SIZE_WORD = BUFF_SIZE / 2;

// 30ms G723数据
const unsigned int BUFF_SIZE_G723 = 24;

const unsigned int BUFF_SIZE_G711 = BUFF_SIZE / 24;

const bool DEFAULT_USE_G723 = false;

const unsigned int AUDIO_BUFF_HEAD_SIZE = sizeof( int );

const unsigned int MAX_AUDIO_BUFF_SIZE = BUFF_SIZE_G711 * LENGTH + AUDIO_BUFF_HEAD_SIZE;

const unsigned int FULL_AUDIO_BUFF_SIZE = BUFF_SIZE * LENGTH;


#ifdef _ARM_CODEC_
#define CODEC_LIB "libcodecarm.so.1"
#else
#define CODEC_LIB "libcodecpc.so.1"
#endif // _ARM_CODEC

typedef short int WORD16;

#endif // _AUDIO_H_