VTrain/engine/DecodeEngine/VideoDecodeEngine.cpp

/**
 * 视频流解码引擎
 * */

#include "VideoDecodeEngine.h"

using namespace std;
using namespace cv;
using namespace ai_matrix;

VideoDecodeEngine::VideoDecodeEngine() {}

VideoDecodeEngine::~VideoDecodeEngine() {}

APP_ERROR VideoDecodeEngine::Init()
{
    dataSourceConfig_ = Config::getins()->getDataSourceConfig();

    strPort0_ = engineName_ + "_" + std::to_string(engineId_) + "_0";

    LogInfo << "VideoDecodeEngine Init ok";
    return APP_ERR_OK;
}

APP_ERROR VideoDecodeEngine::DeInit()
{
    if (harddecoder_ != nullptr)
    {
        harddecoder_->hardDecoderDeInit();
        delete harddecoder_;
        harddecoder_ = nullptr;
    }
    LogInfo << "VideoDecodeEngine DeInit ok";
    return APP_ERR_OK;
}

APP_ERROR VideoDecodeEngine::Process()
{
    int iRet = APP_ERR_OK;
    uint32_t iSkipCount = 1;
    while (!isStop_)
    {
        //从上一引擎接收图像数据
        std::shared_ptr<void> pVoidData0 = nullptr;
        inputQueMap_[strPort0_]->pop(pVoidData0);
        if (nullptr == pVoidData0)
        {
            std::this_thread::sleep_for(std::chrono::milliseconds(10));
            continue;
        }

        std::shared_ptr<ProcessData> pProcessData = std::static_pointer_cast<ProcessData>(pVoidData0);

        if (pProcessData->bIsTrainEnd)
        {
            iRet = outputQueMap_[strPort0_]->push(std::static_pointer_cast<void>(pProcessData));
            if (iRet != APP_ERR_OK)
            {
                LogError << "push the decode yuv420m frame data failed...";
            }
            continue;
        }

        //创建解码类
        if (harddecoder_ == nullptr)
        {
            harddecoder_ = new HardDecode;
            int iRet = harddecoder_->hardDecoderInit(pProcessData->dataSourceInfo.iWidth,
                                                                            pProcessData->dataSourceInfo.iHeight,
                                                                            pProcessData->dataSourceInfo.iRate,
                                                                            pProcessData->pCodecParameters_);
            if (!iRet)
            {
                LogError << " 硬解码初始化失败！";
                if (harddecoder_)
                {
                    delete harddecoder_;
                    harddecoder_ = nullptr;
                }
                continue;
            }
        }

        // 构造YUV420M数据
        unsigned int pYUV420MBuffer_Size = pProcessData->dataSourceInfo.iWidth * pProcessData->dataSourceInfo.iHeight * 3 / 2;
        void *pYUV420MBuffer = nullptr;
        pYUV420MBuffer = new uint8_t[pYUV420MBuffer_Size];
        std::shared_ptr<void> pYUVData;
        // 智能指针管理内存
        pYUVData.reset(pYUV420MBuffer, [](void *data){if(data) {delete[] data; data = nullptr;}});

        // 这里填入一个指向完整H264/H265数据帧的指针
        harddecoder_->pPacket_->data = static_cast<uint8_t *>(pProcessData->sourceFrameData.pData.get());
        // 这个填入H264/H265数据帧的大小
        harddecoder_->pPacket_->size = pProcessData->sourceFrameData.iSize;

        int iDecodeRet = harddecoder_->hardDecoder(pYUV420MBuffer,
                                                   &pYUV420MBuffer_Size);
        if (iDecodeRet)
        {
            if (iSkipCount++ % dataSourceConfig_.iSkipInterval != 0)
            {
                continue;
            }
            iSkipCount = 1;

            //硬解码YUV转BGR
            cv::Mat matYUV(pProcessData->dataSourceInfo.iHeight * 3 / 2,
                           pProcessData->dataSourceInfo.iWidth,
                           CV_8UC1);
            memcpy(matYUV.data,
                   static_cast<uint8_t *>(pYUVData.get()),
                   pYUV420MBuffer_Size);

            cv::Mat matBGR(pProcessData->dataSourceInfo.iHeight,
                           pProcessData->dataSourceInfo.iWidth,
                           CV_8UC3);
            cv::cvtColor(matYUV,
                         matBGR,
                         cv::COLOR_YUV2BGR