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