QT视频播放器

#include "videoplayer.h" /*** ***DecodeVideo类的成员 ***/ static QMutex decodeVideoMutex; #if 0 DecodeVideo::DecodeVideo() { bufferRGB = NULL; } DecodeVideo::~DecodeVideo() { } void DecodeVideo::setAVCodecContext(AVCodecContext*ctx) { pCodecCtx = ctx; width = pCodecCtx->width; height= pCodecCtx->height; pix_fmt = pCodecCtx->pix_fmt; if (bufferRGB != NULL) { av_free(bufferRGB); bufferRGB = NULL; } int numBytes = avpicture_get_size(PIX_FMT_RGB24, pCodecCtx->width,pCodecCtx->height); bufferRGB = (uint8_t *)av_malloc(numBytes*sizeof(uint8_t)); } void DecodeVideo::run() { int frameFinished = 0; AVFrame *pFrame = avcodec_alloc_frame(); decodeVideoMutex.lock(); avcodec_decode_video(pCodecCtx, pFrame, &frameFinished,packet.data,packet.size); decodeVideoMutex.unlock(); AVFrame *pFrameRGB; pFrameRGB = avcodec_alloc_frame(); avpicture_fill((AVPicture *)pFrameRGB, bufferRGB, PIX_FMT_RGB24,pCodecCtx->width, pCodecCtx->height); SwsContext *convert_ctx = sws_getContext(width,height,pix_fmt,width,height,PIX_FMT_RGB24,SWS_BICUBIC, NULL,NULL,NULL); sws_scale(convert_ctx,(const uint8_t* const*)pFrame->data,pFrame->linesize,0,height,pFrameRGB->data,pFrameRGB->linesize); QImage tmpImage((uchar *)bufferRGB,width,height,QImage::Format_RGB888); QImage image = tmpImage.copy(); av_free(pFrameRGB); sws_freeContext(convert_ctx); emit readOneFrame(image); av_free_packet(&packet); } #endif /*** ***VideoPlayer类的成员 ***/ VideoPlayer::VideoPlayer() { initAvcodec(); aCodecCtx = NULL; pFormatCtx = NULL; eventloop = NULL; curState = StoppedState; curType = NoneType; // decodeVideoThread = new DecodeVideo; // connect(decodeVideoThread,SIGNAL(readOneFrame(QImage)),this,SIGNAL(readOneFrame(QImage))); } VideoPlayer::~VideoPlayer() { } void VideoPlayer::run() { eventloop = new QEventLoop; QTimer playtimer; //控制播放的定时器 connect(&playtimer,SIGNAL(timeout()),this,SLOT(readPacket()),Qt::DirectConnection); playtimer.start(50); eventloop->exec(); delete eventloop; eventloop = NULL; } void VideoPlayer::initAvcodec() { av_register_all(); avcodec_init(); avcodec_register_all(); avdevice_register_all(); } bool VideoPlayer::openVideo(char *filename) { videoStream = -1; audioStream = -1; if(av_open_input_file(&pFormatCtx, filename, NULL, 0, NULL)!=0) { fprintf(stderr, "Couldn't open file\n"); return false; //Couldn't open file } if(av_find_stream_info(pFormatCtx)<0) { fprintf(stderr, "Couldn't find stream information\n"); return false ; // Couldn't find stream information } //dump_format(pFormatCtx, 0, filename, 0); //输出视频信息到终端 int i; for(i=0; i<pFormatCtx->nb_streams; i++) { if(pFormatCtx->streams[i]->codec->codec_type==CODEC_TYPE_VIDEO && videoStream < 0) { videoStream=i; } if(pFormatCtx->streams[i]->codec->codec_type==CODEC_TYPE_AUDIO && audioStream < 0) { audioStream=i; } } if(audioStream==-1 && videoStream==-1) { closeVideo(); fprintf(stderr, "Didn't find a audio stream\n"); return false; // Didn't find a audio stream } if (videoStream != -1) { // Get a pointer to the codec context for the video stream pCodecCtx=pFormatCtx->streams[videoStream]->codec; // Find the decoder for the video stream AVCodec *pCodec=avcodec_find_decoder(pCodecCtx->codec_id); if(pCodec==NULL) { fprintf(stderr, "Unsupported codec!\n"); return false; // Codec not found } // Open codec if(avcodec_open(pCodecCtx, pCodec)<0) { fprintf(stderr, "Could not open audio codec!\n"); return false; // Could not open audio codec } curType = VideoType; } else { curType = AudioType; } if (audioStream != -1) { aCodecCtx = pFormatCtx->streams[audioStream]->codec; AVCodec *aCodec = avcodec_find_decoder(aCodecCtx->codec_id); if(!aCodec) { fprintf(stderr, "Unsupported codec!\n"); return false; } if(avcodec_open(aCodecCtx, aCodec)<0) { fprintf(stderr, "Could not open video codec!\n"); return false; // Could not open video codec } } totaltime = pFormatCtx->duration; return true; } void VideoPlayer::closeVideo() { if (aCodecCtx != NULL) { avcodec_close(aCodecCtx); } if (pFormatCtx != NULL) { av_close_input_file(pFormatCtx); } aCodecCtx = NULL; pFormatCtx = NULL; curType = NoneType; } //extern QQueue<QByteArray> queueFrame; void VideoPlayer::readPacket() { if (pFormatCtx == NULL) return; mutex.lock(); currenttime+=10; if (currenttime >= nextPacket.dts) { // if(nextPacket.stream_index == videoStream) // if(!queueFrame.isEmpty()) { // QByteArray getFram = queueFrame.dequeue(); packet = nextPacket; // qDebug()<<packet.size<<packet.date[0]<<packet.date[1]<<packet.date[2]<<packet.date[3]<<packet.date[4]<<packet.date[5]; qDebug("%d:[%02x][%02x][%02x][%02x][%02x][%02x][%02x][%02x][%02x][%02x][%02x][%02x][%02x][%02x][%02x][%02x][%02x][%02x][%02x][%02x][%02x][%02x][%02x][%02x]", packet.size, packet.data[0], packet.data[1], packet.data[2], packet.data[3], packet.data[4], packet.data[5], packet.data[6], packet.data[7], packet.data[8], packet.data[9], packet.data[10], packet.data[11], packet.data[12], packet.data[13], packet.data[14], packet.data[15], packet.data[16], packet.data[17], packet.data[18], packet.data[19], packet.data[20], packet.data[21], packet.data[22], packet.data[23] ); int frameFinished = 0; AVFrame *pFrame = avcodec_alloc_frame(); decodeVideoMutex.lock(); avcodec_decode_video(pCodecCtx, pFrame, &frameFinished,packet.data,packet.size); // avcodec_decode_video(pCodecCtx, pFrame, &frameFinished,(uint8_t *)getFram.data(),getFram.size()); decodeVideoMutex.unlock(); AVFrame *pFrameRGB; pFrameRGB = avcodec_alloc_frame(); avpicture_fill((AVPicture *)pFrameRGB, bufferRGB, PIX_FMT_RGB24,pCodecCtx->width, pCodecCtx->height); SwsContext *convert_ctx = sws_getContext(width,height,pix_fmt,width,height,PIX_FMT_RGB24,SWS_BICUBIC, NULL,NULL,NULL); sws_scale(convert_ctx,(const uint8_t* const*)pFrame->data,pFrame->linesize,0,height,pFrameRGB->data,pFrameRGB->linesize); QImage tmpImage((uchar *)bufferRGB,width,height,QImage::Format_RGB888); QImage image = tmpImage.copy(); av_free(pFrameRGB); sws_freeContext(convert_ctx); emit readOneFrame(image); // av_free_packet(&packet); } if(av_read_frame(pFormatCtx, &nextPacket) < 0) {//整个视频文件读取完毕 stop(); currenttime =