#define?__STDC_CONSTANT_MACROS
extern?“C“
{
#include?
#include?
#include?
#include?
#include?
#include?
#include?
}

#define?INBUF_SIZE?4096
#define?AUDIO_INBUF_SIZE?20480
#define?AUDIO_REFILL_THRESH?4096

#include?“capthread.h“
#include?
#include?


void?CapThread::capframe（）
{
????QImage?image?=?QPixmap::grabWindow（QApplication::desktop（）->winId（））.toImage（）;
????image?=?image.scaled（QSize（resize_width?resize_height））;

????av_init_packet（pkt）;
????pkt->data?=?NULL;????//?packet?data?will?be?allocated?by?the?encoder
????pkt->size?=?0;

????for?（int?h?=?0;?h?height;?h++）
????{
????????for?（int?w?=?0;?w?width;?w++）
????????{
????????????QRgb?rgb?=?image.pixel（w?h）;

????????????int?r?=?qRed（rgb）;
????????????int?g?=?qGreen（rgb）;
????????????int?b?=?qBlue（rgb）;

????????????int?dy?=?（（66*r?+?129*g?+?25*b）?>>?8）?+?16;
????????????int?du?=?（（-38*r?+?-74*g?+?112*b）?>>?8）?+?128;
????????????int?dv?=?（（112*r?+?-94*g?+?-18*b）?>>?8）?+?128;

????????????uchar?yy?=?（uchar）dy;
????????????uchar?uu?=?（uchar）du;
????????????uchar?vv?=?（uchar）dv;

????????????frame->data[0][h?*?frame->linesize[0]?+?w]?=?yy;

????????????if（h?%?2?==?0?&&?w?%?2?==?0）
????????????{
????????????????frame->data[1][h/2?*?（frame->linesize[1]）?+?w/2]?=?uu;
????????????????frame->data[2][h/2?*?（frame->linesize[2]）?+?w/2]?=?vv;
????????????}

????????}
????}

????frame->pts?=?i;

????/*?encode?the?image?*/
????ret?=?avcodec_encode_video2（c?pkt?frame?&got_output）;

????if?（ret?????{
????????printf（“Error?encoding?frame\n“）;
????????exit（1）;
????}

????if?（got_output）
????{
????????printf（“Write?frame?%3d?（size=%5d）\n“?i?pkt->size）;

????????fwrite（pkt->data?1?pkt->size?f）;
????????fflush（f）;
????????av_free_packet（pkt）;
????}

????i?++;
}


CapThread::CapThread（int?width?int?height?Qobject?*parent）?:?QThread（parent）
{
????resize_width?=?width;
????resize_height?=?height;

????avcodec_register_all（）;
????c=?NULL;
????pkt?=?new?AVPacket;
????i?=?0;


????codec?=?avcodec_find_encoder（AV_CODEC_ID_MPEG1VIDEO）;

????if?（codec?==?0）
????{
????????printf（“find?encoder?failed\n“）;
????????exit（1）;
????}
/*
????const?AVRational*?sup?=?codec->supported_framerates;
????int?k?=?0;
????while（true）
????{
????????AVRational?rat?=?sup[k];
????????if（rat.num?==?0?&&?rat.den?==?0）
????????????break;

????????printf（“%d??%d\n“?rat.num?rat.den）;
????????k++;
????}*/

????c?=?avcodec_alloc_context3（codec）;
????if?（!c）
????{
????????printf（“alloc?context?failed\n“）;
????????exit（1）;
????}

????//c->bit_rate?=?400000;
????c->width?=?width;
????c->height?=?height;
????c->time_base?=?（AVRational）{1?25};
????c->gop_size?=?20;
????c->max_b_frames?=?1;
????c->pix_fmt?=?AV_PIX_FMT_YUV420P;
?

?屬性????????????大小?????日期????時間???名稱
-----------?---------??----------?-----??----
?????目錄???????????0??2014-05-30?21:47??ScreenCapture\
?????文件????????3997??2014-05-30?21:45??ScreenCapture\capthread.cpp
?????文件?????????704??2014-05-30?21:40??ScreenCapture\capthread.h
?????文件????????4161??2014-05-30?21:38??ScreenCapture\main.cpp
?????目錄???????????0??2014-05-30?21:47??ScreenCapture\release\
?????文件????19348992??2014-05-28?10:07??ScreenCapture\release\avcodec-55.dll
?????文件?????1340928??2014-05-28?10:07??ScreenCapture\release\avdevice-55.dll
?????文件?????2036224??2014-05-28?10:07??ScreenCapture\release\avfilter-4.dll
?????文件?????5651456??2014-05-28?10:07??ScreenCapture\release\avformat-55.dll
?????文件??????420864??2014-05-28?10:07??ScreenCapture\release\avutil-52.dll
?????文件??????118784??2011-12-02?09:30??ScreenCapture\release\libgcc_s_dw2-1.dll
?????文件??????979982??2011-12-02?09:30??ScreenCapture\release\libstdc++-6.dll
?????文件???????47972??2011-08-24?06:59??ScreenCapture\release\mingwm10.dll
?????文件??????121344??2014-05-28?10:07??ScreenCapture\release\postproc-52.dll
?????文件?????2847232??2013-03-28?21:21??ScreenCapture\release\QtCore4.dll
?????文件????10137600??2013-03-28?21:20??ScreenCapture\release\QtGui4.dll
?????文件???????63488??2014-05-30?21:45??ScreenCapture\release\ScreenCapture.exe
?????文件??????278016??2014-05-28?10:07??ScreenCapture\release\swresample-0.dll
?????文件??????434176??2014-05-28?10:07??ScreenCapture\release\swscale-2.dll
?????文件?????????746??2014-05-30?13:38??ScreenCapture\ScreenCapture.pro
?????文件???????28043??2014-05-30?21:43??ScreenCapture\ScreenCapture.pro.user