www.pudn.com > UVC.zip > processImage.cpp, change:2014-12-19,size:4513b

#include "processImage.h"
#include "videodevice.h"
#include "ui_mainwindow.h"
#include <QProcess>
#include "data.h"
extern "C"
{
#include "jpeglib.h"
#include <stdio.h>
#include <stdlib.h>
}



ProcessImage::ProcessImage(QWidget *parent)
    :QMainWindow(parent)
{
    setupUi(this);
    pp = (unsigned char *)malloc(320 * 240/*QWidget::width()*QWidget::height()*/* 3 * sizeof(char));
    painter = new QPainter(this);
    frame = new QImage(pp,320,240,QImage::Format_RGB888);
    run=new CRcv_thread;
    vd = new VideoDevice(tr("/dev/video0"));
    jpeg_exited = false;
    connect(vd, SIGNAL(display_error(QString)), this,SLOT(display_error(QString)));
    connect(run, SIGNAL(run_date(QString)), this,SLOT(play_date(QString)));
    rs = vd->open_device();
    if(-1==rs)
    {
        QMessageBox::warning(this,tr("error"),tr("open /dev/dsp error"),QMessageBox::Yes);
        vd->close_device();
    }

    rs = vd->init_device();
    if(-1==rs)
    {
        QMessageBox::warning(this,tr("error"),tr("init failed"),QMessageBox::Yes);
        vd->close_device();
    }

    rs = vd->start_capturing();
    if(-1==rs)
    {
        QMessageBox::warning(this,tr("error"),tr("start capture failed"),QMessageBox::Yes);
        vd->close_device();
    }

    if(-1==rs)
    {
        QMessageBox::warning(this,tr("error"),tr("get frame failed"),QMessageBox::Yes);
        vd->stop_capturing();
    }

    timer = new QTimer(this);
    connect(timer,SIGNAL(timeout()),this,SLOT(update()));
    timer->start(30);
    run->start();
    //QHBoxLayout *hLayout = new QHBoxLayout();
    //hLayout->addWidget(label);
    //setLayout(hLayout);
    //setWindowTitle(tr("Capture"));
}

ProcessImage::~ProcessImage()
{
    rs = vd->stop_capturing();
    rs = vd->uninit_device();
    rs = vd->close_device();
    /*关闭按键设备文件*/
    //close(buttons_led_fd);
}

void ProcessImage::paintEvent(QPaintEvent *)
{
    rs = vd->get_frame((void **)&p,&len);
    convert_yuv_to_rgb_buffer(p,pp,320,240/*QWidget::width(),QWidget::height()*/);
    frame->loadFromData((uchar *)pp,/*len*/320 * 240 * 3 * sizeof(char));

    label->setPixmap(QPixmap::fromImage(*frame,Qt::AutoColor));
    rs = vd->unget_frame();
}

void ProcessImage::play_date(QString str)
{
    textEdit->setText(str);
    return;
}

void ProcessImage::display_error(QString err)
{
    QMessageBox::warning(this,tr("error"), err,QMessageBox::Yes);
}


/*yuv格式转换为rgb格式*/
int ProcessImage::convert_yuv_to_rgb_buffer(unsigned char *yuv, unsigned char *rgb, unsigned int width, unsigned int height)
{


    unsigned int in, out = 0;
    unsigned int pixel_16;
    unsigned char pixel_24[3];
    unsigned int pixel32;
    int y0, u, y1, v;
    for(in = 0; in < width * height * 2; in += 4) {
        pixel_16 =
                yuv[in + 3] << 24 |
                               yuv[in + 2] << 16 |
                                              yuv[in + 1] <<  8 |
                                                              yuv[in + 0];
        y0 = (pixel_16 & 0x000000ff);
        u  = (pixel_16 & 0x0000ff00) >>  8;
        y1 = (pixel_16 & 0x00ff0000) >> 16;
        v  = (pixel_16 & 0xff000000) >> 24;
        pixel32 = convert_yuv_to_rgb_pixel(y0, u, v);
        pixel_24[0] = (pixel32 & 0x000000ff);
        pixel_24[1] = (pixel32 & 0x0000ff00) >> 8;
        pixel_24[2] = (pixel32 & 0x00ff0000) >> 16;
        rgb[out++] = pixel_24[0];
        rgb[out++] = pixel_24[1];
        rgb[out++] = pixel_24[2];
        pixel32 = convert_yuv_to_rgb_pixel(y1, u, v);
        pixel_24[0] = (pixel32 & 0x000000ff);
        pixel_24[1] = (pixel32 & 0x0000ff00) >> 8;
        pixel_24[2] = (pixel32 & 0x00ff0000) >> 16;
        rgb[out++] = pixel_24[0];
        rgb[out++] = pixel_24[1];
        rgb[out++] = pixel_24[2];

        }
       rgb1=rgb;
       width1=width;
       height1=height;
        return 0;
    }


 int ProcessImage::convert_yuv_to_rgb_pixel(int y, int u, int v)
    {
        unsigned int pixel32 = 0;
        unsigned char *pixel = (unsigned char *)&pixel32;
        int r, g, b;
        r = y + (1.370705 * (v-128));
        g = y - (0.698001 * (v-128)) - (0.337633 * (u-128));
        b = y + (1.732446 * (u-128));
        if(r > 255) r = 255;
        if(g > 255) g = 255;
        if(b > 255) b = 255;
        if(r < 0) r = 0;
        if(g < 0) g = 0;
        if(b < 0) b = 0;
        pixel[0] = r * 220 / 256;
        pixel[1] = g * 220 / 256;
        pixel[2] = b * 220 / 256;
        return pixel32;
    }
    /*yuv格式转换为rgb格式*/