如何复制IMFSample对象

IMFSample* pOriginalSample = /* 原始IMFSample对象 */;
IMFSample* pNewSample = nullptr;

// 创建新的IMFSample对象
HRESULT hr = MFCreateSample(&pNewSample);

if (SUCCEEDED(hr))
{
    // 获取时间戳和持续时间
    LONGLONG sampleTime = 0;
    LONGLONG sampleDuration = 0;
    hr = pOriginalSample->GetSampleTime(&sampleTime);
    hr = pOriginalSample->GetSampleDuration(&sampleDuration);

    // 设置时间戳和持续时间
    hr = pNewSample->SetSampleTime(sampleTime);
    hr = pNewSample->SetSampleDuration(sampleDuration);

    // 复制数据缓冲区
    DWORD bufferCount = 0;
    hr = pOriginalSample->GetBufferCount(&bufferCount);

    for (DWORD i = 0; i < bufferCount; i++)
    {
        IMFMediaBuffer* pBuffer = nullptr;
        hr = pOriginalSample->GetBufferByIndex(i, &pBuffer);

        if (SUCCEEDED(hr))
        {
            IMFMediaBuffer* pNewBuffer = nullptr;
            hr = MFCreateMemoryBuffer(pBuffer->GetCurrentLength(), &pNewBuffer);

            // 复制数据
            BYTE* pSrcData = nullptr;
            DWORD srcLength = 0;
            hr = pBuffer->Lock(&pSrcData, nullptr, &srcLength);
            BYTE* pDstData = nullptr;
            DWORD dstLength = 0;
            hr = pNewBuffer->Lock(&pDstData, nullptr, &dstLength);
            memcpy(pDstData, pSrcData, srcLength);
            hr = pNewBuffer->Unlock();
            hr = pBuffer->Unlock();

            // 将新的数据缓冲区添加到新的IMFSample对象中
            hr = pNewSample->AddBuffer(pNewBuffer);
            pNewBuffer->Release();
        }

        pBuffer->Release();
    }
}

// 使用复制后的IMFSample对象进行后续处理
/* ... */

// 释放资源
if (pNewSample)
{
    pNewSample->Release();
}