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https://github.com/mozilla/gecko-dev.git
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e5e885ae31
# ignore-this-changeset --HG-- extra : amend_source : 7221c8d15a765df71171099468e7c7faa648f37c extra : histedit_source : a0cce6015636202bff09e35a13f72e03257a7695
233 lines
6.9 KiB
C++
233 lines
6.9 KiB
C++
/*
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* Copyright 2013, Mozilla Foundation and contributors
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#include "WMFUtils.h"
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#include "ClearKeyUtils.h"
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#include <versionhelpers.h>
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#include <algorithm>
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#include <stdio.h>
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#define INITGUID
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#include <guiddef.h>
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#ifndef __MINGW32__
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# pragma comment(lib, "mfuuid.lib")
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# pragma comment(lib, "wmcodecdspuuid")
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#endif
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void LOG(const char* format, ...) {
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#ifdef WMF_DECODER_LOG
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va_list args;
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va_start(args, format);
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vprintf(format, args);
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#endif
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}
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DEFINE_GUID(CLSID_CMSH264DecMFT, 0x62CE7E72, 0x4C71, 0x4d20, 0xB1, 0x5D, 0x45,
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0x28, 0x31, 0xA8, 0x7D, 0x9D);
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namespace wmf {
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#define MFPLAT_FUNC(_func, _dllname) decltype(::_func)* _func;
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#include "WMFSymbols.h"
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#undef MFPLAT_FUNC
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static bool LinkMfplat() {
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static bool sInitDone = false;
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static bool sInitOk = false;
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if (!sInitDone) {
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sInitDone = true;
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HMODULE handle;
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#define MFPLAT_FUNC(_func, _dllname) \
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handle = GetModuleHandleA(_dllname); \
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if (!(_func = (decltype(_func))(GetProcAddress(handle, #_func)))) { \
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return false; \
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}
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#include "WMFSymbols.h"
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#undef MFPLAT_FUNC
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sInitOk = true;
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}
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return sInitOk;
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}
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const char* WMFDecoderDllName() {
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// For H.264 decoding, we need msmpeg2vdec.dll on Win 7 & 8,
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// and mfh264dec.dll on Vista.
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if (IsWindows7OrGreater()) {
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return "msmpeg2vdec.dll";
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} else {
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return "mfh264dec.dll";
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}
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}
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bool EnsureLibs() {
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static bool sInitDone = false;
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static bool sInitOk = false;
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if (!sInitDone) {
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sInitOk = LinkMfplat() && !!GetModuleHandleA(WMFDecoderDllName());
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sInitDone = true;
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}
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return sInitOk;
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}
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int32_t MFOffsetToInt32(const MFOffset& aOffset) {
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return int32_t(aOffset.value + (aOffset.fract / 65536.0f));
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}
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// Gets the sub-region of the video frame that should be displayed.
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// See:
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// http://msdn.microsoft.com/en-us/library/windows/desktop/bb530115(v=vs.85).aspx
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HRESULT
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GetPictureRegion(IMFMediaType* aMediaType, IntRect& aOutPictureRegion) {
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// Determine if "pan and scan" is enabled for this media. If it is, we
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// only display a region of the video frame, not the entire frame.
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BOOL panScan =
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MFGetAttributeUINT32(aMediaType, MF_MT_PAN_SCAN_ENABLED, FALSE);
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// If pan and scan mode is enabled. Try to get the display region.
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HRESULT hr = E_FAIL;
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MFVideoArea videoArea;
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memset(&videoArea, 0, sizeof(MFVideoArea));
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if (panScan) {
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hr = aMediaType->GetBlob(MF_MT_PAN_SCAN_APERTURE, (UINT8*)&videoArea,
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sizeof(MFVideoArea), NULL);
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}
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// If we're not in pan-and-scan mode, or the pan-and-scan region is not set,
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// check for a minimimum display aperture.
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if (!panScan || hr == MF_E_ATTRIBUTENOTFOUND) {
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hr = aMediaType->GetBlob(MF_MT_MINIMUM_DISPLAY_APERTURE, (UINT8*)&videoArea,
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sizeof(MFVideoArea), NULL);
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}
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if (hr == MF_E_ATTRIBUTENOTFOUND) {
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// Minimum display aperture is not set, for "backward compatibility with
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// some components", check for a geometric aperture.
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hr = aMediaType->GetBlob(MF_MT_GEOMETRIC_APERTURE, (UINT8*)&videoArea,
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sizeof(MFVideoArea), NULL);
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}
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if (SUCCEEDED(hr)) {
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// The media specified a picture region, return it.
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IntRect picture = IntRect(MFOffsetToInt32(videoArea.OffsetX),
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MFOffsetToInt32(videoArea.OffsetY),
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videoArea.Area.cx, videoArea.Area.cy);
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ENSURE(picture.width <= mozilla::MAX_VIDEO_WIDTH, E_FAIL);
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ENSURE(picture.height <= mozilla::MAX_VIDEO_HEIGHT, E_FAIL);
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aOutPictureRegion = picture;
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return S_OK;
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}
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// No picture region defined, fall back to using the entire video area.
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UINT32 width = 0, height = 0;
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hr = MFGetAttributeSize(aMediaType, MF_MT_FRAME_SIZE, &width, &height);
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ENSURE(SUCCEEDED(hr), hr);
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ENSURE(width <= mozilla::MAX_VIDEO_WIDTH, E_FAIL);
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ENSURE(height <= mozilla::MAX_VIDEO_HEIGHT, E_FAIL);
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aOutPictureRegion = IntRect(0, 0, width, height);
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return S_OK;
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}
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HRESULT
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GetDefaultStride(IMFMediaType* aType, uint32_t* aOutStride) {
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// Try to get the default stride from the media type.
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UINT32 stride = 0;
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HRESULT hr = aType->GetUINT32(MF_MT_DEFAULT_STRIDE, &stride);
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if (SUCCEEDED(hr)) {
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ENSURE(stride <= mozilla::MAX_VIDEO_WIDTH, E_FAIL);
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*aOutStride = stride;
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return S_OK;
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}
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// Stride attribute not set, calculate it.
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GUID subtype = GUID_NULL;
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uint32_t width = 0;
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uint32_t height = 0;
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hr = aType->GetGUID(MF_MT_SUBTYPE, &subtype);
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ENSURE(SUCCEEDED(hr), hr);
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hr = MFGetAttributeSize(aType, MF_MT_FRAME_SIZE, &width, &height);
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ENSURE(SUCCEEDED(hr), hr);
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ENSURE(width <= mozilla::MAX_VIDEO_WIDTH, E_FAIL);
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ENSURE(height <= mozilla::MAX_VIDEO_HEIGHT, E_FAIL);
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LONG lstride = 0;
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hr = MFGetStrideForBitmapInfoHeader(subtype.Data1, width, &lstride);
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ENSURE(SUCCEEDED(hr), hr);
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ENSURE(lstride <= mozilla::MAX_VIDEO_WIDTH, E_FAIL);
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ENSURE(lstride >= 0, E_FAIL);
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*aOutStride = lstride;
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return hr;
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}
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void dump(const uint8_t* data, uint32_t len, const char* filename) {
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FILE* f = 0;
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fopen_s(&f, filename, "wb");
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fwrite(data, len, 1, f);
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fclose(f);
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}
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HRESULT
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CreateMFT(const CLSID& clsid, const char* aDllName,
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CComPtr<IMFTransform>& aOutMFT) {
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HMODULE module = ::GetModuleHandleA(aDllName);
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if (!module) {
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LOG("Failed to get %S\n", aDllName);
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return E_FAIL;
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}
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typedef HRESULT(WINAPI * DllGetClassObjectFnPtr)(
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const CLSID& clsid, const IID& iid, void** object);
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DllGetClassObjectFnPtr GetClassObjPtr =
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reinterpret_cast<DllGetClassObjectFnPtr>(
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GetProcAddress(module, "DllGetClassObject"));
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if (!GetClassObjPtr) {
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LOG("Failed to get DllGetClassObject\n");
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return E_FAIL;
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}
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CComPtr<IClassFactory> classFactory;
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HRESULT hr = GetClassObjPtr(
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clsid, __uuidof(IClassFactory),
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reinterpret_cast<void**>(static_cast<IClassFactory**>(&classFactory)));
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if (FAILED(hr)) {
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LOG("Failed to get H264 IClassFactory\n");
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return E_FAIL;
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}
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hr = classFactory->CreateInstance(
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NULL, __uuidof(IMFTransform),
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reinterpret_cast<void**>(static_cast<IMFTransform**>(&aOutMFT)));
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if (FAILED(hr)) {
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LOG("Failed to get create MFT\n");
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return E_FAIL;
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}
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return S_OK;
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}
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int32_t GetNumThreads(int32_t aCoreCount) {
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return aCoreCount > 4 ? -1 : (std::max)(aCoreCount - 1, 1);
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}
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} // namespace wmf
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