我正在尝试使用intel-media-sdk解码器来播放h.264视频。这是我的初始化解码器的代码:
mfxStatus decoder::initDecoder(HWND window, mfxBitstream *Header) {
mfxStatus sts = MFX_ERR_NONE;
mfxVersion ver = { { 0, 1 } };
mfxVideoParam mfxVideoParams;
mfxFrameAllocator mfxAllocator;
mfxFrameAllocResponse mfxResponse;
sts = m_mfxSession.Init(MFX_IMPL_AUTO_ANY, &ver); //sts = MFX_ERR_NONE
if (sts == MFX_ERR_NONE) {
sts = m_mfxSession.SetHandle(MFX_HANDLE_DIRECT3D_DEVICE_MANAGER9,
m_renderer.initD3d(GetIntelDeviceAdapterNum(), window)); //sts = MFX_ERR_NONE
if (sts == MFX_ERR_NONE) {
mfxAllocator.pthis = m_mfxSession;
sts = m_mfxSession.SetFrameAllocator(&mfxAllocator); //sts = MFX_ERR_NONE
if (sts == MFX_ERR_NONE) {
MFXVideoDECODE mfxDEC(m_mfxSession);
m_mfxVideoDecode = mfxDEC;
memset(&mfxVideoParams, 0, sizeof(mfxVideoParams));
mfxVideoParams.mfx.CodecId = MFX_CODEC_AVC;
mfxVideoParams.IOPattern = MFX_IOPATTERN_OUT_VIDEO_MEMORY;
sts = m_mfxVideoDecode.DecodeHeader(Header, &mfxVideoParams); //sts = MFX_ERR_NONE
if (sts == MFX_ERR_NONE) {
memset(&m_mfxRequest, 0, sizeof(m_mfxRequest));
sts = m_mfxVideoDecode.QueryIOSurf(&mfxVideoParams, &m_mfxRequest); //sts = MFX_ERR_NONE
if (sts == MFX_ERR_NONE) {
sts = m_renderer.allocSurfaces(mfxAllocator.pthis, &m_mfxRequest, &mfxResponse);
if (sts == MFX_ERR_NONE) {
m_pmfxSurfaces = new mfxFrameSurface1 *[m_mfxRequest.NumFrameSuggested];
for (int i = 0; i < m_mfxRequest.NumFrameSuggested; i++) {
m_pmfxSurfaces[i] = new mfxFrameSurface1;
memset(m_pmfxSurfaces[i], 0, sizeof(mfxFrameSurface1));
memcpy(&(m_pmfxSurfaces[i]->Info), &(mfxVideoParams.mfx.FrameInfo), sizeof(mfxFrameInfo));
// MID (memory id) represents one video NV12 surface
m_pmfxSurfaces[i]->Data.MemId = mfxResponse.mids[i];
};
sts = m_mfxVideoDecode.Init(&mfxVideoParams); //sts = MFX_ERR_MEMORY_ALLOC
}
}
}
}
}
}
return sts;
}
因为你可以看到MFXVideoDECODE::Init(mfxVideoParam*)
(内部调用MFXVideoDECODE_Init
)返回MFX_ERR_MEMORY_ALLOC
,这里奇怪的是this document它说这个函数没有这个回复值。
以下是有关mfxVideoParams
的一些调试信息:
AllocId = 0,AsyncDepth = 0,IOPattern = 16,mfx.CodecId = 541283905, mfx.CodecProfile = 77,mfx.CodecLevel = 30,vpp.In.FourCC = 842094158, vpp.In.Width = 864,vpp.In.Height = 480,vpp.In.CropW = 854, vpp.In.CropH = 480,vpp.In.BufferSize = 31458144,vpp.In.AspectRatioW = 1,vpp.In.AspectRatioH = 1,vpp.In.PicStruct = 1,vpp.In.ChromaFormat = 1
以下是标题中的一些成员数据定义,用于此处:
MFXVideoSession m_mfxSession;
MFXVideoDECODE m_mfxVideoDecode;
mfxFrameAllocRequest m_mfxRequest;
mfxFrameSurface1** m_pmfxSurfaces;
以下是有关我当前工作设备的一些信息,可能与此问题有关:
最后重现完全相同的情况我从this site下载了名为big_buck_bunny_1080p_h264.mov
的视频,然后用ffmpeg将其解压缩到h264并在我的程序中使用它。
答案 0 :(得分:2)
您需要使用适当的函数初始化mfxFrameAlocator回调函数(Alloc,Free,GetHDL,...)。 例如:
//static member
mfxStatus decoder::gethdl(mfxHDL pthis, mfxMemId mid, mfxHDL* handle)
{
pthis; // To avoid warning for this unused parameter
if (handle == 0) return MFX_ERR_INVALID_HANDLE;
*handle = mid;
return MFX_ERR_NONE;
}
mfxStatus decoder::initDecoder(HWND window, mfxBitstream *Header) {
//blah blah
mfxAllocator.pthis = m_mfxSession;
mfxAllocator.GetHDL = gethdl;
//define for these too
//mfxAllocator.Alloc = alloc;
//mfxAllocator.Free = free;
//mfxAllocator.Lock = lock;
//mfxAllocator.Unlock = unlock;
//rest of your code
}