QT海康视频播放器源码，含海康SDK

#include "mythread.h" #include "qtplayer.h" extern char g_achPath[256]; mythread::mythread() { } mythread::~mythread() { } bool YV12_to_RGB24(unsigned char* pYV12, unsigned char* pRGB24, int iWidth, int iHeight) { if(!pYV12 || !pRGB24) return false; const long nYLen = long(iHeight * iWidth); const int nHfWidth = (iWidth>>1); if(nYLen<1 || nHfWidth<1) return false; // yv12数据格式，其中Y分量长度为width * height, U和V分量长度都为width * height / 4 // |WIDTH | // y......y-------- // y......y HEIGHT // y......y // y......y-------- // v..v // v..v // u..u // u..u unsigned char* yData = pYV12; unsigned char* vData = &yData[nYLen]; unsigned char* uData = &vData[nYLen>>2]; if(!uData || !vData) return false; // Convert YV12 to RGB24 // // formula // [1 1 1 ] // [r g b] = [y u-128 v-128] [0 0.34375 0 ] // [1.375 0.703125 1.734375] // another formula // [1 1 1 ] // [r g b] = [y u-128 v-128] [0 0.698001 0 ] // [1.370705 0.703125 1.732446] int rgb[3]; int i, j, m, n, x, y; m = -iWidth; n = -nHfWidth; for(y=0; y < iHeight; y++) { m += iWidth; if(!(y % 2)) n += nHfWidth; for(x=0; x < iWidth; x++) { i = m + x; j = n + (x>>1); rgb[2] = int(yData[i] + 1.370705 * (vData[j] - 128)); // r分量值 rgb[1] = int(yData[i] - 0.698001 * (uData[j] - 128) - 0.703125 * (vData[j] - 128)); // g分量值 rgb[0] = int(yData[i] + 1.732446 * (uData[j] - 128)); // b分量值 j = nYLen - iWidth - m + x; i = (j<<1) + j; for(j=0; j<3; j++) { if(rgb[j]>=0 && rgb[j]<=255) pRGB24[i + j] = rgb[j]; else pRGB24[i + j] = (rgb[j] < 0) ? 0 : 255; } } } return true; } TImgInfo g_tInfo; extern mythread *g_qthread; void CALLBACK HaikangDisplayCbFun( DISPLAY_INFO *pstDisplayInfo ) { memset( &g_tInfo, 0, sizeof( g_tInfo ) ); YV12_to_RGB24( (unsigned char *)pstDisplayInfo->pBuf, (unsigned char *)g_tInfo.g_achBuf, pstDisplayInfo->nWidth, pstDisplayInfo->nHeight ); g_tInfo.w = pstDisplayInfo->nWidth; g_tInfo.h = pstDisplayInfo->nHeight; g_qthread->post(); Sleep( 25 ); } void mythread::post() { emit threadsignal(); } void mythread::run() { if ( PlayM4_InitDDraw( NULL ) ) { if ( PlayM4_GetPort( &m_lPort ) ) { if ( PlayM4_OpenFile( m_lPort, g_achPath )) { PlayM4_SetDisplayCallBackEx( m_lPort, HaikangDisplayCbFun, NULL ); PlayM4_Play( m_lPort, NULL ); } else { PlayM4_FreePort( m_lPort ); return; } } else { return; } } return; } void mythread::stopplay() { if ( PlayM4_Stop(m_lPort) ) { PlayM4_CloseFile( m_lPort ); PlayM4_FreePort( m_lPort ); PlayM4_RealeseDDraw(); } }