85 lines
2.9 KiB
C++
85 lines
2.9 KiB
C++
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#include "videodec.h"
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VideoDec::VideoDec(QObject *parent) :
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QObject(parent)
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{
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}
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void VideoDec::init()
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{
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BUFFSIZE = 0;
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avcodec_register_all();
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av_register_all();
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pFormatCtx = avformat_alloc_context();
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pCodecCtx = avcodec_alloc_context3(pCodec);
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if(avformat_open_input(&pFormatCtx,FileName,NULL,NULL)!=0){
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qDebug()<<"OpenFail";
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}
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if(avformat_find_stream_info(pFormatCtx,NULL)<0){
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qDebug()<<"FindFail";
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}
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videoindex = -1;
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for(int i=0;pFormatCtx->nb_streams;i++){
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if(pFormatCtx->streams[i]->codec->codec_type == AVMEDIA_TYPE_VIDEO){
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videoindex = i;
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break;
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}
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}
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if(videoindex == -1){
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qDebug()<<"Din't find video stream";
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}
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pCodecCtx = pFormatCtx->streams[videoindex]->codec;
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pCodec = avcodec_find_decoder(pCodecCtx->codec_id);
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if(pCodec == NULL){
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qDebug()<<"codec not find";
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}
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if(avcodec_open2(pCodecCtx,pCodec,NULL)<0){
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qDebug()<<"can't open codec";
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}
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// pFrame = avcodec_alloc_frame();
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// pFrameRGB = avcodec_alloc_frame();
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pFrame = av_frame_alloc();
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pFrameRGB = av_frame_alloc();
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play();
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}
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void VideoDec::play()
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{
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int got_picture;
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av_new_packet(&packet, pCodecCtx->width*pCodecCtx->height);
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uint8_t *out_buffer;
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out_buffer = new uint8_t[avpicture_get_size(AV_PIX_FMT_RGB32, pCodecCtx->width, pCodecCtx->height)];//分配AVFrame所需内存
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avpicture_fill((AVPicture *)pFrameRGB, out_buffer, AV_PIX_FMT_RGB32, pCodecCtx->width, pCodecCtx->height);//填充AVFrame
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avpicture_fill((AVPicture *)pFrame, out_buffer, AV_PIX_FMT_RGB32, pCodecCtx->width, pCodecCtx->height);//填充AVFrame
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while(1){
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// QThread::msleep(1);
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if(iSopflag==1)
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return;
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if(BUFFSIZE>51) continue;
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if(iSopflag==1)
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return;
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if(!(av_read_frame(pFormatCtx,&packet)>=0)) break;
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if(packet.stream_index == videoindex){
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int rec = avcodec_decode_video2(pCodecCtx,pFrame,&got_picture,&packet);
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if(rec>0){
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SwsContext *convertCtx = sws_getContext(pCodecCtx->width,pCodecCtx->height
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,pCodecCtx->pix_fmt,pCodecCtx->width,pCodecCtx->height
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,AV_PIX_FMT_RGB32,SWS_BICUBIC,NULL,NULL,NULL);
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sws_scale(convertCtx,(const uint8_t* const*)pFrame->data,pFrame->linesize,0
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,pCodecCtx->height,pFrameRGB->data,pFrameRGB->linesize);
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QImage Img((uchar *)pFrameRGB->data[0],pCodecCtx->width,pCodecCtx->height,QImage::Format_RGB32);
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VideoImg.append(Img.copy());
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BUFFSIZE++;
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sws_freeContext(convertCtx);
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}
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av_free_packet(&packet);
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}
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if(iSopflag==1)
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return;
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}
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}
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void VideoDec::stop()
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{
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iSopflag=1;
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}
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