给定 URL 的字节流类型不受支持 MediaFoundation

问题描述

我需要从缓冲区（即 wav 字节）创建一个阅读器才能做到这一点我正在使用这种方法：

void co_AudioEncoderMF::load_from_memory(unsigned char const * data,long data_size)
{
    unsigned char * buf = new unsigned char[data_size]; //JUST FOR TEST IN ORDER TO BE SURE THAT I HAVE THIS DATA
    memcpy(buf,data,data_size);

    IMFMediaType *input_type = nullptr;
    IMFSourceReader *source_reader = nullptr;
    IMFMediaType *ouput_media_type = nullptr;
    IMFSinkWriter *sink_writer = nullptr;
    IStream * stream = nullptr;
    IMFByteStream * byte_stream = nullptr;

    HRESULT hr = InitAndStartCOMLib();

    if (SUCCEEDED(hr))
    {
        hr = create_stream(buf,data_size,&stream);  <---- HERE I CREATE A STREAM
    }

    if (SUCCEEDED(hr))
    {
        hr = MFCreateMFByteStreamOnStream(stream,&byte_stream);
    }

    HGLOBAL hGlobal = nullptr;
    //IMFSourceReader *pReader = nullptr;

    if (SUCCEEDED(hr))
    {
        GetHGlobalFromStream(stream,&hGlobal);
        hr = create_source_reader(byte_stream,&source_reader);   <----- HERE I CREATE A READER
    }
...
}

HRESULT co_AudioEncoderMF::InitAndStartCOMLib()
{
    HRESULT hr = S_OK;
    HeapSetinformation(nullptr,HeapEnableTerminationOnCorruption,nullptr,0);

    // Initialize the COM library.
    hr = CoInitializeEx(nullptr,COINIT_APARTMENTTHREADED | COINIT_disABLE_OLE1DDE);

    // Initialize the Media Foundation platform.
    if (SUCCEEDED(hr))
    {
        hr = MFStartup(MF_VERSION);
    }

    return hr;
}

HRESULT co_AudioEncoderMF::create_stream(unsigned char const * pData,long dataLen,IStream ** out_stream)
{
    HGLOBAL m_phMem = ::GlobalAlloc(GMEM_MOVEABLE,dataLen);

    if (!m_phMem)
    {
        printf("Error AfxThrowMemoryException");
    }

    LPVOID dest = ::GlobalLock(m_phMem);

    memcpy(dest,pData,dataLen);
    ::GlobalUnlock(m_phMem);

    return CreateStreamOnHGlobal(m_phMem,FALSE /*fDeleteOnRelease*/,out_stream);// NOTE :: in order to get more flexablity need to consider such an approach https://gist.github.com/alekseytimoshchenko/e8f52604fdeb50c8ad7873aeb8281bfa
}

HRESULT co_AudioEncoderMF::create_source_reader(IMFByteStream * in_byte_stream,IMFSourceReader **source_reader)
{
    HRESULT hr = S_OK;

    IMFAttributes * attr = nullptr;
    hr = MFCreateAttributes(&attr,10);

    if (SUCCEEDED(hr))
    {
        hr = attr->SetUINT32(MF_READWRITE_ENABLE_HARDWARE_TRANSFORMS,true);
    }
    else
    {
        printf("Error MFCreateAttributes");
    }

    if (SUCCEEDED(hr))
    {
        hr = MFCreateSourceReaderFromByteStream(in_byte_stream,attr,source_reader); <----- AND HERE I GOT MY ERROR ABOUT UNSUPPORTED FORMAT
    }
    else
    {
        printf("Error Atrr->SetUINT32(MF_READWRITE_ENABLE_HARDWARE_TRANSFORMS,true)");
    }

    if (Failed(hr))
    {
        printf("Error MFCreateSourceReaderFromByteStream");
    }

    return hr;
}

我正在使用相同的方法，但使用 mp3 字节并且它有效，我认为它有区别，但我不知道如何批准和解决。

解决方法

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