Hu Chunming / FFNvDecoder

#include "FFCuContextManager.h"
#include <iostream>

using namespace std;

FFCuContextManager::~FFCuContextManager()
{
    for(auto iter = ctxMap.begin(); iter != ctxMap.end(); iter++){
        av_buffer_unref(&iter->second);
    }
    ctxMap.clear();
}

AVBufferRef *FFCuContextManager::getCuCtx(string gpuid)
{
     AVBufferRef *hw_device_ctx = ctxMap[gpuid];
     if (nullptr == hw_device_ctx)
     {
        // 初始化硬件解码器
        if (av_hwdevice_ctx_create(&hw_device_ctx, AV_HWDEVICE_TYPE_CUDA, gpuid.c_str(), nullptr, 0) < 0) 
        {
            av_log(nullptr, AV_LOG_ERROR, "Failed to create specified HW device ! \n");
            return nullptr;
        }
        ctxMap[gpuid] = hw_device_ctx;
     }
     return hw_device_ctx;
}