基于树莓派的嵌入式语音识别系统源代码1
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2022-08-08
18:50:08
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Graph.cpp
#include "graph.h"
Graph::Graph(QWidget *parent) : QWidget(parent) //类的构造
{
graph_space = 0; //相关数据的初始化
for (int i = 0; i < 450; ++i) {
graph_data[i] = 0;
}
}
void Graph::startTime(double timer_t) //计时器的开始
{
timerID = startTimer(timer_t);
}
void Graph::stopTime() //计时器的结束
{
killTimer(timerID);
}
void Graph::paintEvent(QPaintEvent *) //用于进行图像的重绘
{
QPainter painter(this); //新建画笔
painter.setPen(Qt::gray); //画笔颜色-表示边框颜色
painter.setBrush(Qt::white); //花刷颜色-表示内部颜色
painter.drawRect(0, 0, 465, 405);
for (int i = 1; i < 4; ++i) { //绘制横向坐标线
painter.drawLine(0, i * 101, 465, i * 101);
}
for (int i = 1; i < 5; ++i) { //绘制纵向坐标线
painter.drawLine(i * 93, 0, i * 93, 405);
}
painter.setPen(QColor(30, 160, 200)); //设置画笔颜色
int old_y = 0, new_y;
for (int i = 0; i < 450; ++i) {
new_y = (405 / 2) * (1 - graph_data[(graph_space + i) % 450]); //计算当前数值在位图中的像素位
置
painter.drawLine(i - 1, old_y, i, new_y); //线的绘制是从前点至后点
old_y = new_y;
}
}
void Graph::timerEvent(QTimerEvent *) //用于触发计时器的操作
{
graph_data[graph_space] = paragraph_voice / qPow(2, SIZE); //取出数据存放到位图中
graph_space++; //位标后移
update(); //更新位图
}
Graph.h
#ifndef GRAPH_H
#define GRAPH_H
#include "voice.h"
#include <QWidget>
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