forked from LeenkxTeam/LNXSDK
2751 lines
94 KiB
C++
2751 lines
94 KiB
C++
//------------------------------------------------------------------------------
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// File: WinUtil.cpp
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//
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// Desc: DirectShow base classes - implements generic window handler class.
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//
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// Copyright (c) 1992-2001 Microsoft Corporation. All rights reserved.
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//------------------------------------------------------------------------------
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#undef NOMINMAX
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#include <streams.h>
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#include <limits.h>
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#include <dvdmedia.h>
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#include <strsafe.h>
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#include <checkbmi.h>
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#ifndef max
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#define max(a, b) (((a) > (b)) ? (a) : (b))
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#endif
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#ifndef min
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#define min(a, b) (((a) < (b)) ? (a) : (b))
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#endif
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static UINT MsgDestroy;
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// Constructor
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CBaseWindow::CBaseWindow(BOOL bDoGetDC, bool bDoPostToDestroy) :
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m_hInstance(g_hInst),
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m_hwnd(NULL),
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m_hdc(NULL),
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m_bActivated(FALSE),
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m_pClassName(NULL),
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m_ClassStyles(0),
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m_WindowStyles(0),
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m_WindowStylesEx(0),
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m_ShowStageMessage(0),
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m_ShowStageTop(0),
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m_MemoryDC(NULL),
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m_hPalette(NULL),
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m_bBackground(FALSE),
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#ifdef DEBUG
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m_bRealizing(FALSE),
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#endif
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m_bNoRealize(FALSE),
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m_bDoPostToDestroy(bDoPostToDestroy)
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{
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m_bDoGetDC = bDoGetDC;
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}
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// Prepare a window by spinning off a worker thread to do the creation and
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// also poll the message input queue. We leave this to be called by derived
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// classes because they might want to override methods like MessageLoop and
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// InitialiseWindow, if we do this during construction they'll ALWAYS call
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// this base class methods. We make the worker thread create the window so
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// it owns it rather than the filter graph thread which is constructing us
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HRESULT CBaseWindow::PrepareWindow()
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{
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if (m_hwnd) return NOERROR;
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ASSERT(m_hwnd == NULL);
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ASSERT(m_hdc == NULL);
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// Get the derived object's window and class styles
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m_pClassName = GetClassWindowStyles(&m_ClassStyles,
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&m_WindowStyles,
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&m_WindowStylesEx);
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if (m_pClassName == NULL) {
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return E_FAIL;
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}
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// Register our special private messages
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m_ShowStageMessage = RegisterWindowMessage(SHOWSTAGE);
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// RegisterWindowMessage() returns 0 if an error occurs.
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if (0 == m_ShowStageMessage) {
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return AmGetLastErrorToHResult();
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}
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m_ShowStageTop = RegisterWindowMessage(SHOWSTAGETOP);
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if (0 == m_ShowStageTop) {
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return AmGetLastErrorToHResult();
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}
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m_RealizePalette = RegisterWindowMessage(REALIZEPALETTE);
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if (0 == m_RealizePalette) {
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return AmGetLastErrorToHResult();
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}
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MsgDestroy = RegisterWindowMessage(TEXT("AM_DESTROY"));
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if (0 == MsgDestroy) {
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return AmGetLastErrorToHResult();
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}
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return DoCreateWindow();
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}
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// Destructor just a placeholder so that we know it becomes virtual
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// Derived classes MUST call DoneWithWindow in their destructors so
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// that no messages arrive after the derived class constructor ends
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#ifdef DEBUG
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CBaseWindow::~CBaseWindow()
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{
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ASSERT(m_hwnd == NULL);
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ASSERT(m_hdc == NULL);
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}
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#endif
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// We use the sync worker event to have the window destroyed. All we do is
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// signal the event and wait on the window thread handle. Trying to send it
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// messages causes too many problems, furthermore to be on the safe side we
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// just wait on the thread handle while it returns WAIT_TIMEOUT or there is
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// a sent message to process on this thread. If the constructor failed to
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// create the thread in the first place then the loop will get terminated
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HRESULT CBaseWindow::DoneWithWindow()
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{
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if (!IsWindow(m_hwnd) || (GetWindowThreadProcessId(m_hwnd, NULL) != GetCurrentThreadId())) {
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if (IsWindow(m_hwnd)) {
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// This code should only be executed if the window exists and if the window's
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// messages are processed on a different thread.
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ASSERT(GetWindowThreadProcessId(m_hwnd, NULL) != GetCurrentThreadId());
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if (m_bDoPostToDestroy) {
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HRESULT hr = S_OK;
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CAMEvent m_evDone(FALSE, &hr);
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if (FAILED(hr)) {
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return hr;
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}
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// We must post a message to destroy the window
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// That way we can't be in the middle of processing a
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// message posted to our window when we do go away
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// Sending a message gives less synchronization.
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PostMessage(m_hwnd, MsgDestroy, (WPARAM)(HANDLE)m_evDone, 0);
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WaitDispatchingMessages(m_evDone, INFINITE);
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} else {
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SendMessage(m_hwnd, MsgDestroy, 0, 0);
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}
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}
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//
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// This is not a leak, the window manager automatically free's
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// hdc's that were got via GetDC, which is the case here.
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// We set it to NULL so that we don't get any asserts later.
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//
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m_hdc = NULL;
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//
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// We need to free this DC though because USER32 does not know
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// anything about it.
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//
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if (m_MemoryDC)
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{
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EXECUTE_ASSERT(DeleteDC(m_MemoryDC));
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m_MemoryDC = NULL;
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}
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// Reset the window variables
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m_hwnd = NULL;
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return NOERROR;
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}
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const HWND hwnd = m_hwnd;
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if (hwnd == NULL) {
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return NOERROR;
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}
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InactivateWindow();
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NOTE("Inactivated");
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// Reset the window styles before destruction
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SetWindowLong(hwnd,GWL_STYLE,m_WindowStyles);
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ASSERT(GetParent(hwnd) == NULL);
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NOTE1("Reset window styles %d",m_WindowStyles);
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// UnintialiseWindow sets m_hwnd to NULL so save a copy
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UninitialiseWindow();
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DbgLog((LOG_TRACE, 2, TEXT("Destroying 0x%8.8X"), hwnd));
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if (!DestroyWindow(hwnd)) {
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DbgLog((LOG_TRACE, 0, TEXT("DestroyWindow %8.8X failed code %d"),
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hwnd, GetLastError()));
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DbgBreak("");
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}
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// Reset our state so we can be prepared again
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m_pClassName = NULL;
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m_ClassStyles = 0;
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m_WindowStyles = 0;
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m_WindowStylesEx = 0;
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m_ShowStageMessage = 0;
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m_ShowStageTop = 0;
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return NOERROR;
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}
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// Called at the end to put the window in an inactive state. The pending list
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// will always have been cleared by this time so event if the worker thread
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// gets has been signaled and gets in to render something it will find both
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// the state has been changed and that there are no available sample images
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// Since we wait on the window thread to complete we don't lock the object
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HRESULT CBaseWindow::InactivateWindow()
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{
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// Has the window been activated
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if (m_bActivated == FALSE) {
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return S_FALSE;
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}
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m_bActivated = FALSE;
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ShowWindow(m_hwnd,SW_HIDE);
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return NOERROR;
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}
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HRESULT CBaseWindow::CompleteConnect()
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{
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m_bActivated = FALSE;
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return NOERROR;
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}
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// This displays a normal window. We ask the base window class for default
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// sizes which unless overriden will return DEFWIDTH and DEFHEIGHT. We go
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// through a couple of extra hoops to get the client area the right size
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// as the object specifies which accounts for the AdjustWindowRectEx calls
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// We also DWORD align the left and top coordinates of the window here to
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// maximise the chance of being able to use DCI/DirectDraw primary surface
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HRESULT CBaseWindow::ActivateWindow()
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{
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// Has the window been sized and positioned already
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if (m_bActivated == TRUE || GetParent(m_hwnd) != NULL) {
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SetWindowPos(m_hwnd, // Our window handle
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HWND_TOP, // Put it at the top
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0, 0, 0, 0, // Leave in current position
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SWP_NOMOVE | // Don't change it's place
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SWP_NOSIZE); // Change Z-order only
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m_bActivated = TRUE;
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return S_FALSE;
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}
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// Calculate the desired client rectangle
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RECT WindowRect, ClientRect = GetDefaultRect();
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GetWindowRect(m_hwnd,&WindowRect);
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AdjustWindowRectEx(&ClientRect,GetWindowLong(m_hwnd,GWL_STYLE),
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FALSE,GetWindowLong(m_hwnd,GWL_EXSTYLE));
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// Align left and top edges on DWORD boundaries
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UINT WindowFlags = (SWP_NOACTIVATE | SWP_FRAMECHANGED);
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WindowRect.left -= (WindowRect.left & 3);
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WindowRect.top -= (WindowRect.top & 3);
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SetWindowPos(m_hwnd, // Window handle
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HWND_TOP, // Put it at the top
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WindowRect.left, // Align left edge
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WindowRect.top, // And also top place
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WIDTH(&ClientRect), // Horizontal size
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HEIGHT(&ClientRect), // Vertical size
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WindowFlags); // Don't show window
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m_bActivated = TRUE;
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return NOERROR;
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}
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// This can be used to DWORD align the window for maximum performance
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HRESULT CBaseWindow::PerformanceAlignWindow()
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{
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RECT ClientRect,WindowRect;
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GetWindowRect(m_hwnd,&WindowRect);
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ASSERT(m_bActivated == TRUE);
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// Don't do this if we're owned
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if (GetParent(m_hwnd)) {
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return NOERROR;
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}
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// Align left and top edges on DWORD boundaries
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GetClientRect(m_hwnd, &ClientRect);
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MapWindowPoints(m_hwnd, HWND_DESKTOP, (LPPOINT) &ClientRect, 2);
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WindowRect.left -= (ClientRect.left & 3);
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WindowRect.top -= (ClientRect.top & 3);
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UINT WindowFlags = (SWP_NOACTIVATE | SWP_NOSIZE);
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SetWindowPos(m_hwnd, // Window handle
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HWND_TOP, // Put it at the top
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WindowRect.left, // Align left edge
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WindowRect.top, // And also top place
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(int) 0,(int) 0, // Ignore these sizes
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WindowFlags); // Don't show window
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return NOERROR;
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}
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// Install a palette into the base window - we may be called by a different
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// thread to the one that owns the window. We have to be careful how we do
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// the palette realisation as we could be a different thread to the window
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// which would cause an inter thread send message. Therefore we realise the
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// palette by sending it a special message but without the window locked
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HRESULT CBaseWindow::SetPalette(HPALETTE hPalette)
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{
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// We must own the window lock during the change
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{
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CAutoLock cWindowLock(&m_WindowLock);
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CAutoLock cPaletteLock(&m_PaletteLock);
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ASSERT(hPalette);
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m_hPalette = hPalette;
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}
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return SetPalette();
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}
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HRESULT CBaseWindow::SetPalette()
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{
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if (!m_bNoRealize) {
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SendMessage(m_hwnd, m_RealizePalette, 0, 0);
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return S_OK;
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} else {
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// Just select the palette
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ASSERT(m_hdc);
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ASSERT(m_MemoryDC);
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CAutoLock cPaletteLock(&m_PaletteLock);
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SelectPalette(m_hdc,m_hPalette,m_bBackground);
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SelectPalette(m_MemoryDC,m_hPalette,m_bBackground);
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return S_OK;
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}
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}
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void CBaseWindow::UnsetPalette()
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{
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CAutoLock cWindowLock(&m_WindowLock);
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CAutoLock cPaletteLock(&m_PaletteLock);
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// Get a standard VGA colour palette
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HPALETTE hPalette = (HPALETTE) GetStockObject(DEFAULT_PALETTE);
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ASSERT(hPalette);
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SelectPalette(GetWindowHDC(), hPalette, TRUE);
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SelectPalette(GetMemoryHDC(), hPalette, TRUE);
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m_hPalette = NULL;
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}
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void CBaseWindow::LockPaletteLock()
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{
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m_PaletteLock.Lock();
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}
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void CBaseWindow::UnlockPaletteLock()
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{
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m_PaletteLock.Unlock();
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}
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// Realise our palettes in the window and device contexts
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HRESULT CBaseWindow::DoRealisePalette(BOOL bForceBackground)
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{
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{
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CAutoLock cPaletteLock(&m_PaletteLock);
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if (m_hPalette == NULL) {
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return NOERROR;
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}
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// Realize the palette on the window thread
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ASSERT(m_hdc);
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ASSERT(m_MemoryDC);
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SelectPalette(m_hdc,m_hPalette,m_bBackground || bForceBackground);
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SelectPalette(m_MemoryDC,m_hPalette,m_bBackground);
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}
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// If we grab a critical section here we can deadlock
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// with the window thread because one of the side effects
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// of RealizePalette is to send a WM_PALETTECHANGED message
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// to every window in the system. In our handling
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// of WM_PALETTECHANGED we used to grab this CS too.
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// The really bad case is when our renderer calls DoRealisePalette()
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// while we're in the middle of processing a palette change
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// for another window.
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// So don't hold the critical section while actually realising
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// the palette. In any case USER is meant to manage palette
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// handling - we shouldn't have to serialize everything as well
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ASSERT(CritCheckOut(&m_WindowLock));
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ASSERT(CritCheckOut(&m_PaletteLock));
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EXECUTE_ASSERT(RealizePalette(m_hdc) != GDI_ERROR);
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EXECUTE_ASSERT(RealizePalette(m_MemoryDC) != GDI_ERROR);
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return (GdiFlush() == FALSE ? S_FALSE : S_OK);
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}
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// This is the global window procedure
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LRESULT CALLBACK WndProc(HWND hwnd, // Window handle
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UINT uMsg, // Message ID
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WPARAM wParam, // First parameter
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LPARAM lParam) // Other parameter
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{
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// Get the window long that holds our window object pointer
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// If it is NULL then we are initialising the window in which
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// case the object pointer has been passed in the window creation
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// structure. IF we get any messages before WM_NCCREATE we will
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// pass them to DefWindowProc.
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CBaseWindow *pBaseWindow = (CBaseWindow *)GetWindowLongPtr(hwnd,0);
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if (pBaseWindow == NULL) {
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// Get the structure pointer from the create struct.
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// We can only do this for WM_NCCREATE which should be one of
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// the first messages we receive. Anything before this will
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// have to be passed to DefWindowProc (i.e. WM_GETMINMAXINFO)
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// If the message is WM_NCCREATE we set our pBaseWindow pointer
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// and will then place it in the window structure
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// turn off WS_EX_LAYOUTRTL style for quartz windows
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if (uMsg == WM_NCCREATE) {
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SetWindowLong(hwnd, GWL_EXSTYLE, GetWindowLong(hwnd, GWL_EXSTYLE) & ~0x400000);
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}
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if ((uMsg != WM_NCCREATE)
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|| (NULL == (pBaseWindow = *(CBaseWindow**) ((LPCREATESTRUCT)lParam)->lpCreateParams)))
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{
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return(DefWindowProc(hwnd, uMsg, wParam, lParam));
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}
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// Set the window LONG to be the object who created us
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#ifdef DEBUG
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SetLastError(0); // because of the way SetWindowLong works
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#endif
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LONG_PTR rc = SetWindowLongPtr(hwnd, (DWORD) 0, (LONG_PTR) pBaseWindow);
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#ifdef DEBUG
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if (0 == rc) {
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// SetWindowLong MIGHT have failed. (Read the docs which admit
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// that it is awkward to work out if you have had an error.)
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LONG lasterror = GetLastError();
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ASSERT(0 == lasterror);
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// If this is not the case we have not set the pBaseWindow pointer
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// into the window structure and we will blow up.
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}
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#endif
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}
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// See if this is the packet of death
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if (uMsg == MsgDestroy && uMsg != 0) {
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pBaseWindow->DoneWithWindow();
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if (pBaseWindow->m_bDoPostToDestroy) {
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EXECUTE_ASSERT(SetEvent((HANDLE)wParam));
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}
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return 0;
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}
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return pBaseWindow->OnReceiveMessage(hwnd,uMsg,wParam,lParam);
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}
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// When the window size changes we adjust our member variables that
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// contain the dimensions of the client rectangle for our window so
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// that we come to render an image we will know whether to stretch
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BOOL CBaseWindow::OnSize(LONG Width, LONG Height)
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{
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m_Width = Width;
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m_Height = Height;
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return TRUE;
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}
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// This function handles the WM_CLOSE message
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BOOL CBaseWindow::OnClose()
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{
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ShowWindow(m_hwnd,SW_HIDE);
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return TRUE;
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}
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// This is called by the worker window thread when it receives a terminate
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// message from the window object destructor to delete all the resources we
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// allocated during initialisation. By the time the worker thread exits all
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// processing will have been completed as the source filter disconnection
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// flushes the image pending sample, therefore the GdiFlush should succeed
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HRESULT CBaseWindow::UninitialiseWindow()
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{
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// Have we already cleaned up
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if (m_hwnd == NULL) {
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ASSERT(m_hdc == NULL);
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ASSERT(m_MemoryDC == NULL);
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return NOERROR;
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}
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// Release the window resources
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EXECUTE_ASSERT(GdiFlush());
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if (m_hdc)
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{
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EXECUTE_ASSERT(ReleaseDC(m_hwnd,m_hdc));
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m_hdc = NULL;
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}
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if (m_MemoryDC)
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{
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EXECUTE_ASSERT(DeleteDC(m_MemoryDC));
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m_MemoryDC = NULL;
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}
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// Reset the window variables
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m_hwnd = NULL;
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return NOERROR;
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|
}
|
|
|
|
|
|
// This is called by the worker window thread after it has created the main
|
|
// window and it wants to initialise the rest of the owner objects window
|
|
// variables such as the device contexts. We execute this function with the
|
|
// critical section still locked. Nothing in this function must generate any
|
|
// SendMessage calls to the window because this is executing on the window
|
|
// thread so the message will never be processed and we will deadlock
|
|
|
|
HRESULT CBaseWindow::InitialiseWindow(HWND hwnd)
|
|
{
|
|
// Initialise the window variables
|
|
|
|
ASSERT(IsWindow(hwnd));
|
|
m_hwnd = hwnd;
|
|
|
|
if (m_bDoGetDC)
|
|
{
|
|
EXECUTE_ASSERT(m_hdc = GetDC(hwnd));
|
|
EXECUTE_ASSERT(m_MemoryDC = CreateCompatibleDC(m_hdc));
|
|
|
|
EXECUTE_ASSERT(SetStretchBltMode(m_hdc,COLORONCOLOR));
|
|
EXECUTE_ASSERT(SetStretchBltMode(m_MemoryDC,COLORONCOLOR));
|
|
}
|
|
|
|
return NOERROR;
|
|
}
|
|
|
|
HRESULT CBaseWindow::DoCreateWindow()
|
|
{
|
|
WNDCLASS wndclass; // Used to register classes
|
|
BOOL bRegistered; // Is this class registered
|
|
HWND hwnd; // Handle to our window
|
|
|
|
bRegistered = GetClassInfo(m_hInstance, // Module instance
|
|
m_pClassName, // Window class
|
|
&wndclass); // Info structure
|
|
|
|
// if the window is to be used for drawing puposes and we are getting a DC
|
|
// for the entire lifetime of the window then changes the class style to do
|
|
// say so. If we don't set this flag then the DC comes from the cache and is
|
|
// really bad.
|
|
if (m_bDoGetDC)
|
|
{
|
|
m_ClassStyles |= CS_OWNDC;
|
|
}
|
|
|
|
if (bRegistered == FALSE) {
|
|
|
|
// Register the renderer window class
|
|
|
|
wndclass.lpszClassName = m_pClassName;
|
|
wndclass.style = m_ClassStyles;
|
|
wndclass.lpfnWndProc = WndProc;
|
|
wndclass.cbClsExtra = 0;
|
|
wndclass.cbWndExtra = sizeof(CBaseWindow *);
|
|
wndclass.hInstance = m_hInstance;
|
|
wndclass.hIcon = NULL;
|
|
wndclass.hCursor = LoadCursor (NULL, IDC_ARROW);
|
|
wndclass.hbrBackground = (HBRUSH) NULL;
|
|
wndclass.lpszMenuName = NULL;
|
|
|
|
RegisterClass(&wndclass);
|
|
}
|
|
|
|
// Create the frame window. Pass the pBaseWindow information in the
|
|
// CreateStruct which allows our message handling loop to get hold of
|
|
// the pBaseWindow pointer.
|
|
|
|
CBaseWindow *pBaseWindow = this; // The owner window object
|
|
hwnd = CreateWindowEx(m_WindowStylesEx, // Extended styles
|
|
m_pClassName, // Registered name
|
|
TEXT("ActiveMovie Window"), // Window title
|
|
m_WindowStyles, // Window styles
|
|
CW_USEDEFAULT, // Start x position
|
|
CW_USEDEFAULT, // Start y position
|
|
DEFWIDTH, // Window width
|
|
DEFHEIGHT, // Window height
|
|
NULL, // Parent handle
|
|
NULL, // Menu handle
|
|
m_hInstance, // Instance handle
|
|
&pBaseWindow); // Creation data
|
|
|
|
// If we failed signal an error to the object constructor (based on the
|
|
// last Win32 error on this thread) then signal the constructor thread
|
|
// to continue, release the mutex to let others have a go and exit
|
|
|
|
if (hwnd == NULL) {
|
|
DWORD Error = GetLastError();
|
|
return AmHresultFromWin32(Error);
|
|
}
|
|
|
|
// Check the window LONG is the object who created us
|
|
ASSERT(GetWindowLongPtr(hwnd, 0) == (LONG_PTR)this);
|
|
|
|
// Initialise the window and then signal the constructor so that it can
|
|
// continue and then finally unlock the object's critical section. The
|
|
// window class is left registered even after we terminate the thread
|
|
// as we don't know when the last window has been closed. So we allow
|
|
// the operating system to free the class resources as appropriate
|
|
|
|
InitialiseWindow(hwnd);
|
|
|
|
DbgLog((LOG_TRACE, 2, TEXT("Created window class (%s) HWND(%8.8X)"),
|
|
m_pClassName, hwnd));
|
|
|
|
return S_OK;
|
|
}
|
|
|
|
|
|
// The base class provides some default handling and calls DefWindowProc
|
|
|
|
LRESULT CBaseWindow::OnReceiveMessage(HWND hwnd, // Window handle
|
|
UINT uMsg, // Message ID
|
|
WPARAM wParam, // First parameter
|
|
LPARAM lParam) // Other parameter
|
|
{
|
|
ASSERT(IsWindow(hwnd));
|
|
|
|
if (PossiblyEatMessage(uMsg, wParam, lParam))
|
|
return 0;
|
|
|
|
// This is sent by the IVideoWindow SetWindowForeground method. If the
|
|
// window is invisible we will show it and make it topmost without the
|
|
// foreground focus. If the window is visible it will also be made the
|
|
// topmost window without the foreground focus. If wParam is TRUE then
|
|
// for both cases the window will be forced into the foreground focus
|
|
|
|
if (uMsg == m_ShowStageMessage) {
|
|
|
|
BOOL bVisible = IsWindowVisible(hwnd);
|
|
SetWindowPos(hwnd, HWND_TOP, 0, 0, 0, 0,
|
|
SWP_NOMOVE | SWP_NOSIZE | SWP_SHOWWINDOW |
|
|
(bVisible ? SWP_NOACTIVATE : 0));
|
|
|
|
// Should we bring the window to the foreground
|
|
if (wParam == TRUE) {
|
|
SetForegroundWindow(hwnd);
|
|
}
|
|
return (LRESULT) 1;
|
|
}
|
|
|
|
// When we go fullscreen we have to add the WS_EX_TOPMOST style to the
|
|
// video window so that it comes out above any task bar (this is more
|
|
// relevant to WindowsNT than Windows95). However the SetWindowPos call
|
|
// must be on the same thread as that which created the window. The
|
|
// wParam parameter can be TRUE or FALSE to set and reset the topmost
|
|
|
|
if (uMsg == m_ShowStageTop) {
|
|
HWND HwndTop = (wParam == TRUE ? HWND_TOPMOST : HWND_NOTOPMOST);
|
|
BOOL bVisible = IsWindowVisible(hwnd);
|
|
SetWindowPos(hwnd, HwndTop, 0, 0, 0, 0,
|
|
SWP_NOMOVE | SWP_NOSIZE |
|
|
(wParam == TRUE ? SWP_SHOWWINDOW : 0) |
|
|
(bVisible ? SWP_NOACTIVATE : 0));
|
|
return (LRESULT) 1;
|
|
}
|
|
|
|
// New palette stuff
|
|
if (uMsg == m_RealizePalette) {
|
|
ASSERT(m_hwnd == hwnd);
|
|
return OnPaletteChange(m_hwnd,WM_QUERYNEWPALETTE);
|
|
}
|
|
|
|
switch (uMsg) {
|
|
|
|
// Repaint the window if the system colours change
|
|
|
|
case WM_SYSCOLORCHANGE:
|
|
|
|
InvalidateRect(hwnd,NULL,FALSE);
|
|
return (LRESULT) 1;
|
|
|
|
// Somebody has changed the palette
|
|
case WM_PALETTECHANGED:
|
|
|
|
OnPaletteChange((HWND)wParam,uMsg);
|
|
return (LRESULT) 0;
|
|
|
|
// We are about to receive the keyboard focus so we ask GDI to realise
|
|
// our logical palette again and hopefully it will be fully installed
|
|
// without any mapping having to be done during any picture rendering
|
|
|
|
case WM_QUERYNEWPALETTE:
|
|
ASSERT(m_hwnd == hwnd);
|
|
return OnPaletteChange(m_hwnd,uMsg);
|
|
|
|
// do NOT fwd WM_MOVE. the parameters are the location of the parent
|
|
// window, NOT what the renderer should be looking at. But we need
|
|
// to make sure the overlay is moved with the parent window, so we
|
|
// do this.
|
|
case WM_MOVE:
|
|
if (IsWindowVisible(m_hwnd)) {
|
|
PostMessage(m_hwnd,WM_PAINT,0,0);
|
|
}
|
|
break;
|
|
|
|
// Store the width and height as useful base class members
|
|
|
|
case WM_SIZE:
|
|
|
|
OnSize(LOWORD(lParam), HIWORD(lParam));
|
|
return (LRESULT) 0;
|
|
|
|
// Intercept the WM_CLOSE messages to hide the window
|
|
|
|
case WM_CLOSE:
|
|
|
|
OnClose();
|
|
return (LRESULT) 0;
|
|
}
|
|
return DefWindowProc(hwnd,uMsg,wParam,lParam);
|
|
}
|
|
|
|
|
|
// This handles the Windows palette change messages - if we do realise our
|
|
// palette then we return TRUE otherwise we return FALSE. If our window is
|
|
// foreground application then we should get first choice of colours in the
|
|
// system palette entries. We get best performance when our logical palette
|
|
// includes the standard VGA colours (at the beginning and end) otherwise
|
|
// GDI may have to map from our palette to the device palette while drawing
|
|
|
|
LRESULT CBaseWindow::OnPaletteChange(HWND hwnd,UINT Message)
|
|
{
|
|
// First check we are not changing the palette during closedown
|
|
|
|
if (m_hwnd == NULL || hwnd == NULL) {
|
|
return (LRESULT) 0;
|
|
}
|
|
ASSERT(!m_bRealizing);
|
|
|
|
// Should we realise our palette again
|
|
|
|
if ((Message == WM_QUERYNEWPALETTE || hwnd != m_hwnd)) {
|
|
// It seems that even if we're invisible that we can get asked
|
|
// to realize our palette and this can cause really ugly side-effects
|
|
// Seems like there's another bug but this masks it a least for the
|
|
// shutting down case.
|
|
if (!IsWindowVisible(m_hwnd)) {
|
|
DbgLog((LOG_TRACE, 1, TEXT("Realizing when invisible!")));
|
|
return (LRESULT) 0;
|
|
}
|
|
|
|
// Avoid recursion with multiple graphs in the same app
|
|
#ifdef DEBUG
|
|
m_bRealizing = TRUE;
|
|
#endif
|
|
DoRealisePalette(Message != WM_QUERYNEWPALETTE);
|
|
#ifdef DEBUG
|
|
m_bRealizing = FALSE;
|
|
#endif
|
|
|
|
// Should we redraw the window with the new palette
|
|
if (Message == WM_PALETTECHANGED) {
|
|
InvalidateRect(m_hwnd,NULL,FALSE);
|
|
}
|
|
}
|
|
|
|
return (LRESULT) 1;
|
|
}
|
|
|
|
|
|
// Determine if the window exists.
|
|
|
|
bool CBaseWindow::WindowExists()
|
|
{
|
|
return !!IsWindow(m_hwnd);
|
|
}
|
|
|
|
|
|
// Return the default window rectangle
|
|
|
|
RECT CBaseWindow::GetDefaultRect()
|
|
{
|
|
RECT DefaultRect = {0,0,DEFWIDTH,DEFHEIGHT};
|
|
ASSERT(m_hwnd);
|
|
// ASSERT(m_hdc);
|
|
return DefaultRect;
|
|
}
|
|
|
|
|
|
// Return the current window width
|
|
|
|
LONG CBaseWindow::GetWindowWidth()
|
|
{
|
|
ASSERT(m_hwnd);
|
|
// ASSERT(m_hdc);
|
|
return m_Width;
|
|
}
|
|
|
|
|
|
// Return the current window height
|
|
|
|
LONG CBaseWindow::GetWindowHeight()
|
|
{
|
|
ASSERT(m_hwnd);
|
|
// ASSERT(m_hdc);
|
|
return m_Height;
|
|
}
|
|
|
|
|
|
// Return the window handle
|
|
|
|
HWND CBaseWindow::GetWindowHWND()
|
|
{
|
|
ASSERT(m_hwnd);
|
|
// ASSERT(m_hdc);
|
|
return m_hwnd;
|
|
}
|
|
|
|
|
|
// Return the window drawing device context
|
|
|
|
HDC CBaseWindow::GetWindowHDC()
|
|
{
|
|
ASSERT(m_hwnd);
|
|
ASSERT(m_hdc);
|
|
return m_hdc;
|
|
}
|
|
|
|
|
|
// Return the offscreen window drawing device context
|
|
|
|
HDC CBaseWindow::GetMemoryHDC()
|
|
{
|
|
ASSERT(m_hwnd);
|
|
ASSERT(m_MemoryDC);
|
|
return m_MemoryDC;
|
|
}
|
|
|
|
|
|
#ifdef DEBUG
|
|
HPALETTE CBaseWindow::GetPalette()
|
|
{
|
|
// The palette lock should always be held when accessing
|
|
// m_hPalette.
|
|
ASSERT(CritCheckIn(&m_PaletteLock));
|
|
return m_hPalette;
|
|
}
|
|
#endif // DEBUG
|
|
|
|
|
|
// This is available to clients who want to change the window visiblity. It's
|
|
// little more than an indirection to the Win32 ShowWindow although these is
|
|
// some benefit in going through here as this function may change sometime
|
|
|
|
HRESULT CBaseWindow::DoShowWindow(LONG ShowCmd)
|
|
{
|
|
ShowWindow(m_hwnd,ShowCmd);
|
|
return NOERROR;
|
|
}
|
|
|
|
|
|
// Generate a WM_PAINT message for the video window
|
|
|
|
void CBaseWindow::PaintWindow(BOOL bErase)
|
|
{
|
|
InvalidateRect(m_hwnd,NULL,bErase);
|
|
}
|
|
|
|
|
|
// Allow an application to have us set the video window in the foreground. We
|
|
// have this because it is difficult for one thread to do do this to a window
|
|
// owned by another thread. Rather than expose the message we use to execute
|
|
// the inter thread send message we provide the interface function. All we do
|
|
// is to SendMessage to the video window renderer thread with a WM_SHOWSTAGE
|
|
|
|
void CBaseWindow::DoSetWindowForeground(BOOL bFocus)
|
|
{
|
|
SendMessage(m_hwnd,m_ShowStageMessage,(WPARAM) bFocus,(LPARAM) 0);
|
|
}
|
|
|
|
|
|
// Constructor initialises the owning object pointer. Since we are a worker
|
|
// class for the main window object we have relatively few state variables to
|
|
// look after. We are given device context handles to use later on as well as
|
|
// the source and destination rectangles (but reset them here just in case)
|
|
|
|
CDrawImage::CDrawImage(__inout CBaseWindow *pBaseWindow) :
|
|
m_pBaseWindow(pBaseWindow),
|
|
m_hdc(NULL),
|
|
m_MemoryDC(NULL),
|
|
m_bStretch(FALSE),
|
|
m_pMediaType(NULL),
|
|
m_bUsingImageAllocator(FALSE)
|
|
{
|
|
ASSERT(pBaseWindow);
|
|
ResetPaletteVersion();
|
|
SetRectEmpty(&m_TargetRect);
|
|
SetRectEmpty(&m_SourceRect);
|
|
|
|
m_perfidRenderTime = MSR_REGISTER(TEXT("Single Blt time"));
|
|
}
|
|
|
|
|
|
// Overlay the image time stamps on the picture. Access to this method is
|
|
// serialised by the caller. We display the sample start and end times on
|
|
// top of the video using TextOut on the device context we are handed. If
|
|
// there isn't enough room in the window for the times we don't show them
|
|
|
|
void CDrawImage::DisplaySampleTimes(IMediaSample *pSample)
|
|
{
|
|
#ifdef DEBUG
|
|
//
|
|
// Only allow the "annoying" time messages if the users has turned the
|
|
// logging "way up"
|
|
//
|
|
BOOL bAccept = DbgCheckModuleLevel(LOG_TRACE, 5);
|
|
if (bAccept == FALSE) {
|
|
return;
|
|
}
|
|
#endif
|
|
|
|
TCHAR szTimes[TIMELENGTH]; // Time stamp strings
|
|
ASSERT(pSample); // Quick sanity check
|
|
RECT ClientRect; // Client window size
|
|
SIZE Size; // Size of text output
|
|
|
|
// Get the time stamps and window size
|
|
|
|
pSample->GetTime((REFERENCE_TIME*)&m_StartSample, (REFERENCE_TIME*)&m_EndSample);
|
|
HWND hwnd = m_pBaseWindow->GetWindowHWND();
|
|
EXECUTE_ASSERT(GetClientRect(hwnd,&ClientRect));
|
|
|
|
// Format the sample time stamps
|
|
|
|
(void)StringCchPrintf(szTimes,NUMELMS(szTimes),TEXT("%08d : %08d"),
|
|
m_StartSample.Millisecs(),
|
|
m_EndSample.Millisecs());
|
|
|
|
ASSERT(lstrlen(szTimes) < TIMELENGTH);
|
|
|
|
// Put the times in the middle at the bottom of the window
|
|
|
|
GetTextExtentPoint32(m_hdc,szTimes,lstrlen(szTimes),&Size);
|
|
INT XPos = ((ClientRect.right - ClientRect.left) - Size.cx) / 2;
|
|
INT YPos = ((ClientRect.bottom - ClientRect.top) - Size.cy) * 4 / 5;
|
|
|
|
// Check the window is big enough to have sample times displayed
|
|
|
|
if ((XPos > 0) && (YPos > 0)) {
|
|
TextOut(m_hdc,XPos,YPos,szTimes,lstrlen(szTimes));
|
|
}
|
|
}
|
|
|
|
|
|
// This is called when the drawing code sees that the image has a down level
|
|
// palette cookie. We simply call the SetDIBColorTable Windows API with the
|
|
// palette that is found after the BITMAPINFOHEADER - we return no errors
|
|
|
|
void CDrawImage::UpdateColourTable(HDC hdc,__in BITMAPINFOHEADER *pbmi)
|
|
{
|
|
ASSERT(pbmi->biClrUsed);
|
|
RGBQUAD *pColourTable = (RGBQUAD *)(pbmi+1);
|
|
|
|
// Set the new palette in the device context
|
|
|
|
UINT uiReturn = SetDIBColorTable(hdc,(UINT) 0,
|
|
pbmi->biClrUsed,
|
|
pColourTable);
|
|
|
|
// Should always succeed but check in debug builds
|
|
ASSERT(uiReturn == pbmi->biClrUsed);
|
|
}
|
|
|
|
|
|
// No source rectangle scaling is done by the base class
|
|
|
|
RECT CDrawImage::ScaleSourceRect(const RECT *pSource)
|
|
{
|
|
ASSERT(pSource);
|
|
return *pSource;
|
|
}
|
|
|
|
|
|
// This is called when the funky output pin uses our allocator. The samples we
|
|
// allocate are special because the memory is shared between us and GDI thus
|
|
// removing one copy when we ask for the image to be rendered. The source type
|
|
// information is in the main renderer m_mtIn field which is initialised when
|
|
// the media type is agreed in SetMediaType, the media type may be changed on
|
|
// the fly if, for example, the source filter needs to change the palette
|
|
|
|
void CDrawImage::FastRender(IMediaSample *pMediaSample)
|
|
{
|
|
BITMAPINFOHEADER *pbmi; // Image format data
|
|
DIBDATA *pDibData; // Stores DIB information
|
|
BYTE *pImage; // Pointer to image data
|
|
HBITMAP hOldBitmap; // Store the old bitmap
|
|
CImageSample *pSample; // Pointer to C++ object
|
|
|
|
ASSERT(m_pMediaType);
|
|
|
|
// From the untyped source format block get the VIDEOINFO and subsequently
|
|
// the BITMAPINFOHEADER structure. We can cast the IMediaSample interface
|
|
// to a CImageSample object so we can retrieve it's DIBSECTION details
|
|
|
|
pbmi = HEADER(m_pMediaType->Format());
|
|
pSample = (CImageSample *) pMediaSample;
|
|
pDibData = pSample->GetDIBData();
|
|
hOldBitmap = (HBITMAP) SelectObject(m_MemoryDC,pDibData->hBitmap);
|
|
|
|
// Get a pointer to the real image data
|
|
|
|
HRESULT hr = pMediaSample->GetPointer(&pImage);
|
|
if (FAILED(hr)) {
|
|
return;
|
|
}
|
|
|
|
// Do we need to update the colour table, we increment our palette cookie
|
|
// each time we get a dynamic format change. The sample palette cookie is
|
|
// stored in the DIBDATA structure so we try to keep the fields in sync
|
|
// By the time we get to draw the images the format change will be done
|
|
// so all we do is ask the renderer for what it's palette version is
|
|
|
|
if (pDibData->PaletteVersion < GetPaletteVersion()) {
|
|
ASSERT(pbmi->biBitCount <= iPALETTE);
|
|
UpdateColourTable(m_MemoryDC,pbmi);
|
|
pDibData->PaletteVersion = GetPaletteVersion();
|
|
}
|
|
|
|
// This allows derived classes to change the source rectangle that we do
|
|
// the drawing with. For example a renderer may ask a codec to stretch
|
|
// the video from 320x240 to 640x480, in which case the source we see in
|
|
// here will still be 320x240, although the source we want to draw with
|
|
// should be scaled up to 640x480. The base class implementation of this
|
|
// method does nothing but return the same rectangle as we are passed in
|
|
|
|
RECT SourceRect = ScaleSourceRect(&m_SourceRect);
|
|
|
|
// Is the window the same size as the video
|
|
|
|
if (m_bStretch == FALSE) {
|
|
|
|
// Put the image straight into the window
|
|
|
|
BitBlt(
|
|
(HDC) m_hdc, // Target device HDC
|
|
m_TargetRect.left, // X sink position
|
|
m_TargetRect.top, // Y sink position
|
|
m_TargetRect.right - m_TargetRect.left, // Destination width
|
|
m_TargetRect.bottom - m_TargetRect.top, // Destination height
|
|
m_MemoryDC, // Source device context
|
|
SourceRect.left, // X source position
|
|
SourceRect.top, // Y source position
|
|
SRCCOPY); // Simple copy
|
|
|
|
} else {
|
|
|
|
// Stretch the image when copying to the window
|
|
|
|
StretchBlt(
|
|
(HDC) m_hdc, // Target device HDC
|
|
m_TargetRect.left, // X sink position
|
|
m_TargetRect.top, // Y sink position
|
|
m_TargetRect.right - m_TargetRect.left, // Destination width
|
|
m_TargetRect.bottom - m_TargetRect.top, // Destination height
|
|
m_MemoryDC, // Source device HDC
|
|
SourceRect.left, // X source position
|
|
SourceRect.top, // Y source position
|
|
SourceRect.right - SourceRect.left, // Source width
|
|
SourceRect.bottom - SourceRect.top, // Source height
|
|
SRCCOPY); // Simple copy
|
|
}
|
|
|
|
// This displays the sample times over the top of the image. This used to
|
|
// draw the times into the offscreen device context however that actually
|
|
// writes the text into the image data buffer which may not be writable
|
|
|
|
#ifdef DEBUG
|
|
DisplaySampleTimes(pMediaSample);
|
|
#endif
|
|
|
|
// Put the old bitmap back into the device context so we don't leak
|
|
SelectObject(m_MemoryDC,hOldBitmap);
|
|
}
|
|
|
|
|
|
// This is called when there is a sample ready to be drawn, unfortunately the
|
|
// output pin was being rotten and didn't choose our super excellent shared
|
|
// memory DIB allocator so we have to do this slow render using boring old GDI
|
|
// SetDIBitsToDevice and StretchDIBits. The down side of using these GDI
|
|
// functions is that the image data has to be copied across from our address
|
|
// space into theirs before going to the screen (although in reality the cost
|
|
// is small because all they do is to map the buffer into their address space)
|
|
|
|
void CDrawImage::SlowRender(IMediaSample *pMediaSample)
|
|
{
|
|
// Get the BITMAPINFOHEADER for the connection
|
|
|
|
ASSERT(m_pMediaType);
|
|
BITMAPINFOHEADER *pbmi = HEADER(m_pMediaType->Format());
|
|
BYTE *pImage;
|
|
|
|
// Get the image data buffer
|
|
|
|
HRESULT hr = pMediaSample->GetPointer(&pImage);
|
|
if (FAILED(hr)) {
|
|
return;
|
|
}
|
|
|
|
// This allows derived classes to change the source rectangle that we do
|
|
// the drawing with. For example a renderer may ask a codec to stretch
|
|
// the video from 320x240 to 640x480, in which case the source we see in
|
|
// here will still be 320x240, although the source we want to draw with
|
|
// should be scaled up to 640x480. The base class implementation of this
|
|
// method does nothing but return the same rectangle as we are passed in
|
|
|
|
RECT SourceRect = ScaleSourceRect(&m_SourceRect);
|
|
|
|
LONG lAdjustedSourceTop = SourceRect.top;
|
|
// if the origin of bitmap is bottom-left, adjust soruce_rect_top
|
|
// to be the bottom-left corner instead of the top-left.
|
|
if (pbmi->biHeight > 0) {
|
|
lAdjustedSourceTop = pbmi->biHeight - SourceRect.bottom;
|
|
}
|
|
// Is the window the same size as the video
|
|
|
|
if (m_bStretch == FALSE) {
|
|
|
|
// Put the image straight into the window
|
|
|
|
SetDIBitsToDevice(
|
|
(HDC) m_hdc, // Target device HDC
|
|
m_TargetRect.left, // X sink position
|
|
m_TargetRect.top, // Y sink position
|
|
m_TargetRect.right - m_TargetRect.left, // Destination width
|
|
m_TargetRect.bottom - m_TargetRect.top, // Destination height
|
|
SourceRect.left, // X source position
|
|
lAdjustedSourceTop, // Adjusted Y source position
|
|
(UINT) 0, // Start scan line
|
|
pbmi->biHeight, // Scan lines present
|
|
pImage, // Image data
|
|
(BITMAPINFO *) pbmi, // DIB header
|
|
DIB_RGB_COLORS); // Type of palette
|
|
|
|
} else {
|
|
|
|
// Stretch the image when copying to the window
|
|
|
|
StretchDIBits(
|
|
(HDC) m_hdc, // Target device HDC
|
|
m_TargetRect.left, // X sink position
|
|
m_TargetRect.top, // Y sink position
|
|
m_TargetRect.right - m_TargetRect.left, // Destination width
|
|
m_TargetRect.bottom - m_TargetRect.top, // Destination height
|
|
SourceRect.left, // X source position
|
|
lAdjustedSourceTop, // Adjusted Y source position
|
|
SourceRect.right - SourceRect.left, // Source width
|
|
SourceRect.bottom - SourceRect.top, // Source height
|
|
pImage, // Image data
|
|
(BITMAPINFO *) pbmi, // DIB header
|
|
DIB_RGB_COLORS, // Type of palette
|
|
SRCCOPY); // Simple image copy
|
|
}
|
|
|
|
// This shows the sample reference times over the top of the image which
|
|
// looks a little flickery. I tried using GdiSetBatchLimit and GdiFlush to
|
|
// control the screen updates but it doesn't quite work as expected and
|
|
// only partially reduces the flicker. I also tried using a memory context
|
|
// and combining the two in that before doing a final BitBlt operation to
|
|
// the screen, unfortunately this has considerable performance penalties
|
|
// and also means that this code is not executed when compiled retail
|
|
|
|
#ifdef DEBUG
|
|
DisplaySampleTimes(pMediaSample);
|
|
#endif
|
|
}
|
|
|
|
|
|
// This is called with an IMediaSample interface on the image to be drawn. We
|
|
// decide on the drawing mechanism based on who's allocator we are using. We
|
|
// may be called when the window wants an image painted by WM_PAINT messages
|
|
// We can't realise the palette here because we have the renderer lock, any
|
|
// call to realise may cause an interthread send message to the window thread
|
|
// which may in turn be waiting to get the renderer lock before servicing it
|
|
|
|
BOOL CDrawImage::DrawImage(IMediaSample *pMediaSample)
|
|
{
|
|
ASSERT(m_hdc);
|
|
ASSERT(m_MemoryDC);
|
|
NotifyStartDraw();
|
|
|
|
// If the output pin used our allocator then the samples passed are in
|
|
// fact CVideoSample objects that contain CreateDIBSection data that we
|
|
// use to do faster image rendering, they may optionally also contain a
|
|
// DirectDraw surface pointer in which case we do not do the drawing
|
|
|
|
if (m_bUsingImageAllocator == FALSE) {
|
|
SlowRender(pMediaSample);
|
|
EXECUTE_ASSERT(GdiFlush());
|
|
NotifyEndDraw();
|
|
return TRUE;
|
|
}
|
|
|
|
// This is a DIBSECTION buffer
|
|
|
|
FastRender(pMediaSample);
|
|
EXECUTE_ASSERT(GdiFlush());
|
|
NotifyEndDraw();
|
|
return TRUE;
|
|
}
|
|
|
|
|
|
BOOL CDrawImage::DrawVideoImageHere(
|
|
HDC hdc,
|
|
IMediaSample *pMediaSample,
|
|
__in LPRECT lprcSrc,
|
|
__in LPRECT lprcDst
|
|
)
|
|
{
|
|
ASSERT(m_pMediaType);
|
|
BITMAPINFOHEADER *pbmi = HEADER(m_pMediaType->Format());
|
|
BYTE *pImage;
|
|
|
|
// Get the image data buffer
|
|
|
|
HRESULT hr = pMediaSample->GetPointer(&pImage);
|
|
if (FAILED(hr)) {
|
|
return FALSE;
|
|
}
|
|
|
|
RECT SourceRect;
|
|
RECT TargetRect;
|
|
|
|
if (lprcSrc) {
|
|
SourceRect = *lprcSrc;
|
|
}
|
|
else SourceRect = ScaleSourceRect(&m_SourceRect);
|
|
|
|
if (lprcDst) {
|
|
TargetRect = *lprcDst;
|
|
}
|
|
else TargetRect = m_TargetRect;
|
|
|
|
LONG lAdjustedSourceTop = SourceRect.top;
|
|
// if the origin of bitmap is bottom-left, adjust soruce_rect_top
|
|
// to be the bottom-left corner instead of the top-left.
|
|
if (pbmi->biHeight > 0) {
|
|
lAdjustedSourceTop = pbmi->biHeight - SourceRect.bottom;
|
|
}
|
|
|
|
|
|
// Stretch the image when copying to the DC
|
|
|
|
BOOL bRet = (0 != StretchDIBits(hdc,
|
|
TargetRect.left,
|
|
TargetRect.top,
|
|
TargetRect.right - TargetRect.left,
|
|
TargetRect.bottom - TargetRect.top,
|
|
SourceRect.left,
|
|
lAdjustedSourceTop,
|
|
SourceRect.right - SourceRect.left,
|
|
SourceRect.bottom - SourceRect.top,
|
|
pImage,
|
|
(BITMAPINFO *)pbmi,
|
|
DIB_RGB_COLORS,
|
|
SRCCOPY));
|
|
return bRet;
|
|
}
|
|
|
|
|
|
// This is called by the owning window object after it has created the window
|
|
// and it's drawing contexts. We are constructed with the base window we'll
|
|
// be drawing into so when given the notification we retrive the device HDCs
|
|
// to draw with. We cannot call these in our constructor as they are virtual
|
|
|
|
void CDrawImage::SetDrawContext()
|
|
{
|
|
m_MemoryDC = m_pBaseWindow->GetMemoryHDC();
|
|
m_hdc = m_pBaseWindow->GetWindowHDC();
|
|
}
|
|
|
|
|
|
// This is called to set the target rectangle in the video window, it will be
|
|
// called whenever a WM_SIZE message is retrieved from the message queue. We
|
|
// simply store the rectangle and use it later when we do the drawing calls
|
|
|
|
void CDrawImage::SetTargetRect(__in RECT *pTargetRect)
|
|
{
|
|
ASSERT(pTargetRect);
|
|
m_TargetRect = *pTargetRect;
|
|
SetStretchMode();
|
|
}
|
|
|
|
|
|
// Return the current target rectangle
|
|
|
|
void CDrawImage::GetTargetRect(__out RECT *pTargetRect)
|
|
{
|
|
ASSERT(pTargetRect);
|
|
*pTargetRect = m_TargetRect;
|
|
}
|
|
|
|
|
|
// This is called when we want to change the section of the image to draw. We
|
|
// use this information in the drawing operation calls later on. We must also
|
|
// see if the source and destination rectangles have the same dimensions. If
|
|
// not we must stretch during the drawing rather than a direct pixel copy
|
|
|
|
void CDrawImage::SetSourceRect(__in RECT *pSourceRect)
|
|
{
|
|
ASSERT(pSourceRect);
|
|
m_SourceRect = *pSourceRect;
|
|
SetStretchMode();
|
|
}
|
|
|
|
|
|
// Return the current source rectangle
|
|
|
|
void CDrawImage::GetSourceRect(__out RECT *pSourceRect)
|
|
{
|
|
ASSERT(pSourceRect);
|
|
*pSourceRect = m_SourceRect;
|
|
}
|
|
|
|
|
|
// This is called when either the source or destination rectanges change so we
|
|
// can update the stretch flag. If the rectangles don't match we stretch the
|
|
// video during the drawing otherwise we call the fast pixel copy functions
|
|
// NOTE the source and/or the destination rectangle may be completely empty
|
|
|
|
void CDrawImage::SetStretchMode()
|
|
{
|
|
// Calculate the overall rectangle dimensions
|
|
|
|
LONG SourceWidth = m_SourceRect.right - m_SourceRect.left;
|
|
LONG SinkWidth = m_TargetRect.right - m_TargetRect.left;
|
|
LONG SourceHeight = m_SourceRect.bottom - m_SourceRect.top;
|
|
LONG SinkHeight = m_TargetRect.bottom - m_TargetRect.top;
|
|
|
|
m_bStretch = TRUE;
|
|
if (SourceWidth == SinkWidth) {
|
|
if (SourceHeight == SinkHeight) {
|
|
m_bStretch = FALSE;
|
|
}
|
|
}
|
|
}
|
|
|
|
|
|
// Tell us whose allocator we are using. This should be called with TRUE if
|
|
// the filter agrees to use an allocator based around the CImageAllocator
|
|
// SDK base class - whose image buffers are made through CreateDIBSection.
|
|
// Otherwise this should be called with FALSE and we will draw the images
|
|
// using SetDIBitsToDevice and StretchDIBitsToDevice. None of these calls
|
|
// can handle buffers which have non zero strides (like DirectDraw uses)
|
|
|
|
void CDrawImage::NotifyAllocator(BOOL bUsingImageAllocator)
|
|
{
|
|
m_bUsingImageAllocator = bUsingImageAllocator;
|
|
}
|
|
|
|
|
|
// Are we using the image DIBSECTION allocator
|
|
|
|
BOOL CDrawImage::UsingImageAllocator()
|
|
{
|
|
return m_bUsingImageAllocator;
|
|
}
|
|
|
|
|
|
// We need the media type of the connection so that we can get the BITMAPINFO
|
|
// from it. We use that in the calls to draw the image such as StretchDIBits
|
|
// and also when updating the colour table held in shared memory DIBSECTIONs
|
|
|
|
void CDrawImage::NotifyMediaType(__in CMediaType *pMediaType)
|
|
{
|
|
m_pMediaType = pMediaType;
|
|
}
|
|
|
|
|
|
// We store in this object a cookie maintaining the current palette version.
|
|
// Each time a palettised format is changed we increment this value so that
|
|
// when we come to draw the images we look at the colour table value they
|
|
// have and if less than the current we know to update it. This version is
|
|
// only needed and indeed used when working with shared memory DIBSECTIONs
|
|
|
|
LONG CDrawImage::GetPaletteVersion()
|
|
{
|
|
return m_PaletteVersion;
|
|
}
|
|
|
|
|
|
// Resets the current palette version number
|
|
|
|
void CDrawImage::ResetPaletteVersion()
|
|
{
|
|
m_PaletteVersion = PALETTE_VERSION;
|
|
}
|
|
|
|
|
|
// Increment the current palette version
|
|
|
|
void CDrawImage::IncrementPaletteVersion()
|
|
{
|
|
m_PaletteVersion++;
|
|
}
|
|
|
|
|
|
// Constructor must initialise the base allocator. Each sample we create has a
|
|
// palette version cookie on board. When the source filter changes the palette
|
|
// during streaming the window object increments an internal cookie counter it
|
|
// keeps as well. When it comes to render the samples it looks at the cookie
|
|
// values and if they don't match then it knows to update the sample's colour
|
|
// table. However we always create samples with a cookie of PALETTE_VERSION
|
|
// If there have been multiple format changes and we disconnect and reconnect
|
|
// thereby causing the samples to be reallocated we will create them with a
|
|
// cookie much lower than the current version, this isn't a problem since it
|
|
// will be seen by the window object and the versions will then be updated
|
|
|
|
CImageAllocator::CImageAllocator(__inout CBaseFilter *pFilter,
|
|
__in_opt LPCTSTR pName,
|
|
__inout HRESULT *phr) :
|
|
CBaseAllocator(pName,NULL,phr,TRUE,TRUE),
|
|
m_pFilter(pFilter)
|
|
{
|
|
ASSERT(phr);
|
|
ASSERT(pFilter);
|
|
}
|
|
|
|
|
|
// Check our DIB buffers have been released
|
|
|
|
#ifdef DEBUG
|
|
CImageAllocator::~CImageAllocator()
|
|
{
|
|
ASSERT(m_bCommitted == FALSE);
|
|
}
|
|
#endif
|
|
|
|
|
|
// Called from destructor and also from base class to free resources. We work
|
|
// our way through the list of media samples deleting the DIBSECTION created
|
|
// for each. All samples should be back in our list so there is no chance a
|
|
// filter is still using one to write on the display or hold on a pending list
|
|
|
|
void CImageAllocator::Free()
|
|
{
|
|
ASSERT(m_lAllocated == m_lFree.GetCount());
|
|
EXECUTE_ASSERT(GdiFlush());
|
|
CImageSample *pSample;
|
|
DIBDATA *pDibData;
|
|
|
|
while (m_lFree.GetCount() != 0) {
|
|
pSample = (CImageSample *) m_lFree.RemoveHead();
|
|
pDibData = pSample->GetDIBData();
|
|
EXECUTE_ASSERT(DeleteObject(pDibData->hBitmap));
|
|
EXECUTE_ASSERT(CloseHandle(pDibData->hMapping));
|
|
delete pSample;
|
|
}
|
|
|
|
m_lAllocated = 0;
|
|
}
|
|
|
|
|
|
// Prepare the allocator by checking all the input parameters
|
|
|
|
STDMETHODIMP CImageAllocator::CheckSizes(__in ALLOCATOR_PROPERTIES *pRequest)
|
|
{
|
|
// Check we have a valid connection
|
|
|
|
if (m_pMediaType == NULL) {
|
|
return VFW_E_NOT_CONNECTED;
|
|
}
|
|
|
|
// NOTE We always create a DIB section with the source format type which
|
|
// may contain a source palette. When we do the BitBlt drawing operation
|
|
// the target display device may contain a different palette (we may not
|
|
// have the focus) in which case GDI will do after the palette mapping
|
|
|
|
VIDEOINFOHEADER *pVideoInfo = (VIDEOINFOHEADER *) m_pMediaType->Format();
|
|
|
|
// When we call CreateDIBSection it implicitly maps only enough memory
|
|
// for the image as defined by thee BITMAPINFOHEADER. If the user asks
|
|
// for an image smaller than this then we reject the call, if they ask
|
|
// for an image larger than this then we return what they can have
|
|
|
|
if ((DWORD) pRequest->cbBuffer < pVideoInfo->bmiHeader.biSizeImage) {
|
|
return E_INVALIDARG;
|
|
}
|
|
|
|
// Reject buffer prefixes
|
|
|
|
if (pRequest->cbPrefix > 0) {
|
|
return E_INVALIDARG;
|
|
}
|
|
|
|
pRequest->cbBuffer = pVideoInfo->bmiHeader.biSizeImage;
|
|
return NOERROR;
|
|
}
|
|
|
|
|
|
// Agree the number of media sample buffers and their sizes. The base class
|
|
// this allocator is derived from allows samples to be aligned only on byte
|
|
// boundaries NOTE the buffers are not allocated until the Commit call
|
|
|
|
STDMETHODIMP CImageAllocator::SetProperties(
|
|
__in ALLOCATOR_PROPERTIES * pRequest,
|
|
__out ALLOCATOR_PROPERTIES * pActual)
|
|
{
|
|
ALLOCATOR_PROPERTIES Adjusted = *pRequest;
|
|
|
|
// Check the parameters fit with the current connection
|
|
|
|
HRESULT hr = CheckSizes(&Adjusted);
|
|
if (FAILED(hr)) {
|
|
return hr;
|
|
}
|
|
return CBaseAllocator::SetProperties(&Adjusted, pActual);
|
|
}
|
|
|
|
|
|
// Commit the memory by allocating the agreed number of media samples. For
|
|
// each sample we are committed to creating we have a CImageSample object
|
|
// that we use to manage it's resources. This is initialised with a DIBDATA
|
|
// structure that contains amongst other things the GDI DIBSECTION handle
|
|
// We will access the renderer media type during this so we must have locked
|
|
// (to prevent the format changing for example). The class overrides Commit
|
|
// and Decommit to do this locking (base class Commit in turn calls Alloc)
|
|
|
|
HRESULT CImageAllocator::Alloc(void)
|
|
{
|
|
ASSERT(m_pMediaType);
|
|
CImageSample *pSample;
|
|
DIBDATA DibData;
|
|
|
|
// Check the base allocator says it's ok to continue
|
|
|
|
HRESULT hr = CBaseAllocator::Alloc();
|
|
if (FAILED(hr)) {
|
|
return hr;
|
|
}
|
|
|
|
// We create a new memory mapped object although we don't map it into our
|
|
// address space because GDI does that in CreateDIBSection. It is possible
|
|
// that we run out of resources before creating all the samples in which
|
|
// case the available sample list is left with those already created
|
|
|
|
ASSERT(m_lAllocated == 0);
|
|
while (m_lAllocated < m_lCount) {
|
|
|
|
// Create and initialise a shared memory GDI buffer
|
|
|
|
hr = CreateDIB(m_lSize,DibData);
|
|
if (FAILED(hr)) {
|
|
return hr;
|
|
}
|
|
|
|
// Create the sample object and pass it the DIBDATA
|
|
|
|
pSample = CreateImageSample(DibData.pBase,m_lSize);
|
|
if (pSample == NULL) {
|
|
EXECUTE_ASSERT(DeleteObject(DibData.hBitmap));
|
|
EXECUTE_ASSERT(CloseHandle(DibData.hMapping));
|
|
return E_OUTOFMEMORY;
|
|
}
|
|
|
|
// Add the completed sample to the available list
|
|
|
|
pSample->SetDIBData(&DibData);
|
|
m_lFree.Add(pSample);
|
|
m_lAllocated++;
|
|
}
|
|
return NOERROR;
|
|
}
|
|
|
|
|
|
// We have a virtual method that allocates the samples so that a derived class
|
|
// may override it and allocate more specialised sample objects. So long as it
|
|
// derives its samples from CImageSample then all this code will still work ok
|
|
|
|
CImageSample *CImageAllocator::CreateImageSample(__in_bcount(Length) LPBYTE pData,LONG Length)
|
|
{
|
|
HRESULT hr = NOERROR;
|
|
CImageSample *pSample;
|
|
|
|
// Allocate the new sample and check the return codes
|
|
|
|
pSample = new CImageSample((CBaseAllocator *) this, // Base class
|
|
NAME("Video sample"), // DEBUG name
|
|
(HRESULT *) &hr, // Return code
|
|
(LPBYTE) pData, // DIB address
|
|
(LONG) Length); // Size of DIB
|
|
|
|
if (pSample == NULL || FAILED(hr)) {
|
|
delete pSample;
|
|
return NULL;
|
|
}
|
|
return pSample;
|
|
}
|
|
|
|
|
|
// This function allocates a shared memory block for use by the source filter
|
|
// generating DIBs for us to render. The memory block is created in shared
|
|
// memory so that GDI doesn't have to copy the memory when we do a BitBlt
|
|
|
|
HRESULT CImageAllocator::CreateDIB(LONG InSize,DIBDATA &DibData)
|
|
{
|
|
BITMAPINFO *pbmi; // Format information for pin
|
|
BYTE *pBase; // Pointer to the actual image
|
|
HANDLE hMapping; // Handle to mapped object
|
|
HBITMAP hBitmap; // DIB section bitmap handle
|
|
|
|
// Create a file mapping object and map into our address space
|
|
|
|
hMapping = CreateFileMapping(hMEMORY, // Use system page file
|
|
NULL, // No security attributes
|
|
PAGE_READWRITE, // Full access to memory
|
|
(DWORD) 0, // Less than 4Gb in size
|
|
InSize, // Size of buffer
|
|
NULL); // No name to section
|
|
if (hMapping == NULL) {
|
|
DWORD Error = GetLastError();
|
|
return MAKE_HRESULT(SEVERITY_ERROR, FACILITY_WIN32, Error);
|
|
}
|
|
|
|
// NOTE We always create a DIB section with the source format type which
|
|
// may contain a source palette. When we do the BitBlt drawing operation
|
|
// the target display device may contain a different palette (we may not
|
|
// have the focus) in which case GDI will do after the palette mapping
|
|
|
|
pbmi = (BITMAPINFO *) HEADER(m_pMediaType->Format());
|
|
if (m_pMediaType == NULL) {
|
|
DbgBreak("Invalid media type");
|
|
}
|
|
|
|
hBitmap = CreateDIBSection((HDC) NULL, // NO device context
|
|
pbmi, // Format information
|
|
DIB_RGB_COLORS, // Use the palette
|
|
(VOID **) &pBase, // Pointer to image data
|
|
hMapping, // Mapped memory handle
|
|
(DWORD) 0); // Offset into memory
|
|
|
|
if (hBitmap == NULL || pBase == NULL) {
|
|
EXECUTE_ASSERT(CloseHandle(hMapping));
|
|
DWORD Error = GetLastError();
|
|
return MAKE_HRESULT(SEVERITY_ERROR, FACILITY_WIN32, Error);
|
|
}
|
|
|
|
// Initialise the DIB information structure
|
|
|
|
DibData.hBitmap = hBitmap;
|
|
DibData.hMapping = hMapping;
|
|
DibData.pBase = pBase;
|
|
DibData.PaletteVersion = PALETTE_VERSION;
|
|
GetObject(hBitmap,sizeof(DIBSECTION),(VOID *)&DibData.DibSection);
|
|
|
|
return NOERROR;
|
|
}
|
|
|
|
|
|
// We use the media type during the DIBSECTION creation
|
|
|
|
void CImageAllocator::NotifyMediaType(__in CMediaType *pMediaType)
|
|
{
|
|
m_pMediaType = pMediaType;
|
|
}
|
|
|
|
|
|
// Overriden to increment the owning object's reference count
|
|
|
|
STDMETHODIMP_(ULONG) CImageAllocator::NonDelegatingAddRef()
|
|
{
|
|
return m_pFilter->AddRef();
|
|
}
|
|
|
|
|
|
// Overriden to decrement the owning object's reference count
|
|
|
|
STDMETHODIMP_(ULONG) CImageAllocator::NonDelegatingRelease()
|
|
{
|
|
return m_pFilter->Release();
|
|
}
|
|
|
|
|
|
// If you derive a class from CMediaSample that has to transport specialised
|
|
// member variables and entry points then there are three alternate solutions
|
|
// The first is to create a memory buffer larger than actually required by the
|
|
// sample and store your information either at the beginning of it or at the
|
|
// end, the former being moderately safer allowing for misbehaving transform
|
|
// filters. You then adjust the buffer address when you create the base media
|
|
// sample. This has the disadvantage of breaking up the memory allocated to
|
|
// the samples into separate blocks. The second solution is to implement a
|
|
// class derived from CMediaSample and support additional interface(s) that
|
|
// convey your private data. This means defining a custom interface. The final
|
|
// alternative is to create a class that inherits from CMediaSample and adds
|
|
// the private data structures, when you get an IMediaSample in your Receive()
|
|
// call check to see if your allocator is being used, and if it is then cast
|
|
// the IMediaSample into one of your objects. Additional checks can be made
|
|
// to ensure the sample's this pointer is known to be one of your own objects
|
|
|
|
CImageSample::CImageSample(__inout CBaseAllocator *pAllocator,
|
|
__in_opt LPCTSTR pName,
|
|
__inout HRESULT *phr,
|
|
__in_bcount(length) LPBYTE pBuffer,
|
|
LONG length) :
|
|
CMediaSample(pName,pAllocator,phr,pBuffer,length),
|
|
m_bInit(FALSE)
|
|
{
|
|
ASSERT(pAllocator);
|
|
ASSERT(pBuffer);
|
|
}
|
|
|
|
|
|
// Set the shared memory DIB information
|
|
|
|
void CImageSample::SetDIBData(__in DIBDATA *pDibData)
|
|
{
|
|
ASSERT(pDibData);
|
|
m_DibData = *pDibData;
|
|
m_bInit = TRUE;
|
|
}
|
|
|
|
|
|
// Retrieve the shared memory DIB data
|
|
|
|
__out DIBDATA *CImageSample::GetDIBData()
|
|
{
|
|
ASSERT(m_bInit == TRUE);
|
|
return &m_DibData;
|
|
}
|
|
|
|
|
|
// This class handles the creation of a palette. It is fairly specialist and
|
|
// is intended to simplify palette management for video renderer filters. It
|
|
// is for this reason that the constructor requires three other objects with
|
|
// which it interacts, namely a base media filter, a base window and a base
|
|
// drawing object although the base window or the draw object may be NULL to
|
|
// ignore that part of us. We try not to create and install palettes unless
|
|
// absolutely necessary as they typically require WM_PALETTECHANGED messages
|
|
// to be sent to every window thread in the system which is very expensive
|
|
|
|
CImagePalette::CImagePalette(__inout CBaseFilter *pBaseFilter,
|
|
__inout CBaseWindow *pBaseWindow,
|
|
__inout CDrawImage *pDrawImage) :
|
|
m_pBaseWindow(pBaseWindow),
|
|
m_pFilter(pBaseFilter),
|
|
m_pDrawImage(pDrawImage),
|
|
m_hPalette(NULL)
|
|
{
|
|
ASSERT(m_pFilter);
|
|
}
|
|
|
|
|
|
// Destructor
|
|
|
|
#ifdef DEBUG
|
|
CImagePalette::~CImagePalette()
|
|
{
|
|
ASSERT(m_hPalette == NULL);
|
|
}
|
|
#endif
|
|
|
|
|
|
// We allow dynamic format changes of the palette but rather than change the
|
|
// palette every time we call this to work out whether an update is required.
|
|
// If the original type didn't use a palette and the new one does (or vica
|
|
// versa) then we return TRUE. If neither formats use a palette we'll return
|
|
// FALSE. If both formats use a palette we compare their colours and return
|
|
// FALSE if they match. This therefore short circuits palette creation unless
|
|
// absolutely necessary since installing palettes is an expensive operation
|
|
|
|
BOOL CImagePalette::ShouldUpdate(const VIDEOINFOHEADER *pNewInfo,
|
|
const VIDEOINFOHEADER *pOldInfo)
|
|
{
|
|
// We may not have a current format yet
|
|
|
|
if (pOldInfo == NULL) {
|
|
return TRUE;
|
|
}
|
|
|
|
// Do both formats not require a palette
|
|
|
|
if (ContainsPalette(pNewInfo) == FALSE) {
|
|
if (ContainsPalette(pOldInfo) == FALSE) {
|
|
return FALSE;
|
|
}
|
|
}
|
|
|
|
// Compare the colours to see if they match
|
|
|
|
DWORD VideoEntries = pNewInfo->bmiHeader.biClrUsed;
|
|
if (ContainsPalette(pNewInfo) == TRUE)
|
|
if (ContainsPalette(pOldInfo) == TRUE)
|
|
if (pOldInfo->bmiHeader.biClrUsed == VideoEntries)
|
|
if (pOldInfo->bmiHeader.biClrUsed > 0)
|
|
if (memcmp((PVOID) GetBitmapPalette(pNewInfo),
|
|
(PVOID) GetBitmapPalette(pOldInfo),
|
|
VideoEntries * sizeof(RGBQUAD)) == 0) {
|
|
|
|
return FALSE;
|
|
}
|
|
return TRUE;
|
|
}
|
|
|
|
|
|
// This is normally called when the input pin type is set to install a palette
|
|
// We will typically be called from two different places. The first is when we
|
|
// have negotiated a palettised media type after connection, the other is when
|
|
// we receive a new type during processing with an updated palette in which
|
|
// case we must remove and release the resources held by the current palette
|
|
|
|
// We can be passed an optional device name if we wish to prepare a palette
|
|
// for a specific monitor on a multi monitor system
|
|
|
|
HRESULT CImagePalette::PreparePalette(const CMediaType *pmtNew,
|
|
const CMediaType *pmtOld,
|
|
__in LPSTR szDevice)
|
|
{
|
|
const VIDEOINFOHEADER *pNewInfo = (VIDEOINFOHEADER *) pmtNew->Format();
|
|
const VIDEOINFOHEADER *pOldInfo = (VIDEOINFOHEADER *) pmtOld->Format();
|
|
ASSERT(pNewInfo);
|
|
|
|
// This is an performance optimisation, when we get a media type we check
|
|
// to see if the format requires a palette change. If either we need one
|
|
// when previously we didn't or vica versa then this returns TRUE, if we
|
|
// previously needed a palette and we do now it compares their colours
|
|
|
|
if (ShouldUpdate(pNewInfo,pOldInfo) == FALSE) {
|
|
NOTE("No update needed");
|
|
return S_FALSE;
|
|
}
|
|
|
|
// We must notify the filter graph that the application may have changed
|
|
// the palette although in practice we don't bother checking to see if it
|
|
// is really different. If it tries to get the palette either the window
|
|
// or renderer lock will ensure it doesn't get in until we are finished
|
|
|
|
RemovePalette();
|
|
m_pFilter->NotifyEvent(EC_PALETTE_CHANGED,0,0);
|
|
|
|
// Do we need a palette for the new format
|
|
|
|
if (ContainsPalette(pNewInfo) == FALSE) {
|
|
NOTE("New has no palette");
|
|
return S_FALSE;
|
|
}
|
|
|
|
if (m_pBaseWindow) {
|
|
m_pBaseWindow->LockPaletteLock();
|
|
}
|
|
|
|
// If we're changing the palette on the fly then we increment our palette
|
|
// cookie which is compared against the cookie also stored in all of our
|
|
// DIBSECTION media samples. If they don't match when we come to draw it
|
|
// then we know the sample is out of date and we'll update it's palette
|
|
|
|
NOTE("Making new colour palette");
|
|
m_hPalette = MakePalette(pNewInfo, szDevice);
|
|
ASSERT(m_hPalette != NULL);
|
|
|
|
if (m_pBaseWindow) {
|
|
m_pBaseWindow->UnlockPaletteLock();
|
|
}
|
|
|
|
// The window in which the new palette is to be realised may be a NULL
|
|
// pointer to signal that no window is in use, if so we don't call it
|
|
// Some filters just want to use this object to create/manage palettes
|
|
|
|
if (m_pBaseWindow) m_pBaseWindow->SetPalette(m_hPalette);
|
|
|
|
// This is the only time where we need access to the draw object to say
|
|
// to it that a new palette will be arriving on a sample real soon. The
|
|
// constructor may take a NULL pointer in which case we don't call this
|
|
|
|
if (m_pDrawImage) m_pDrawImage->IncrementPaletteVersion();
|
|
return NOERROR;
|
|
}
|
|
|
|
|
|
// Helper function to copy a palette out of any kind of VIDEOINFO (ie it may
|
|
// be YUV or true colour) into a palettised VIDEOINFO. We use this changing
|
|
// palettes on DirectDraw samples as a source filter can attach a palette to
|
|
// any buffer (eg YUV) and hand it back. We make a new palette out of that
|
|
// format and then copy the palette colours into the current connection type
|
|
|
|
HRESULT CImagePalette::CopyPalette(const CMediaType *pSrc,__out CMediaType *pDest)
|
|
{
|
|
// Reset the destination palette before starting
|
|
|
|
VIDEOINFOHEADER *pDestInfo = (VIDEOINFOHEADER *) pDest->Format();
|
|
pDestInfo->bmiHeader.biClrUsed = 0;
|
|
pDestInfo->bmiHeader.biClrImportant = 0;
|
|
|
|
// Does the destination have a palette
|
|
|
|
if (PALETTISED(pDestInfo) == FALSE) {
|
|
NOTE("No destination palette");
|
|
return S_FALSE;
|
|
}
|
|
|
|
// Does the source contain a palette
|
|
|
|
const VIDEOINFOHEADER *pSrcInfo = (VIDEOINFOHEADER *) pSrc->Format();
|
|
if (ContainsPalette(pSrcInfo) == FALSE) {
|
|
NOTE("No source palette");
|
|
return S_FALSE;
|
|
}
|
|
|
|
// The number of colours may be zero filled
|
|
|
|
DWORD PaletteEntries = pSrcInfo->bmiHeader.biClrUsed;
|
|
if (PaletteEntries == 0) {
|
|
DWORD Maximum = (1 << pSrcInfo->bmiHeader.biBitCount);
|
|
NOTE1("Setting maximum colours (%d)",Maximum);
|
|
PaletteEntries = Maximum;
|
|
}
|
|
|
|
// Make sure the destination has enough room for the palette
|
|
|
|
ASSERT(pSrcInfo->bmiHeader.biClrUsed <= iPALETTE_COLORS);
|
|
ASSERT(pSrcInfo->bmiHeader.biClrImportant <= PaletteEntries);
|
|
ASSERT(COLORS(pDestInfo) == GetBitmapPalette(pDestInfo));
|
|
pDestInfo->bmiHeader.biClrUsed = PaletteEntries;
|
|
pDestInfo->bmiHeader.biClrImportant = pSrcInfo->bmiHeader.biClrImportant;
|
|
ULONG BitmapSize = GetBitmapFormatSize(HEADER(pSrcInfo));
|
|
|
|
if (pDest->FormatLength() < BitmapSize) {
|
|
NOTE("Reallocating destination");
|
|
pDest->ReallocFormatBuffer(BitmapSize);
|
|
}
|
|
|
|
// Now copy the palette colours across
|
|
|
|
CopyMemory((PVOID) COLORS(pDestInfo),
|
|
(PVOID) GetBitmapPalette(pSrcInfo),
|
|
PaletteEntries * sizeof(RGBQUAD));
|
|
|
|
return NOERROR;
|
|
}
|
|
|
|
|
|
// This is normally called when the palette is changed (typically during a
|
|
// dynamic format change) to remove any palette we previously installed. We
|
|
// replace it (if necessary) in the video window with a standard VGA palette
|
|
// that should always be available even if this is a true colour display
|
|
|
|
HRESULT CImagePalette::RemovePalette()
|
|
{
|
|
if (m_pBaseWindow) {
|
|
m_pBaseWindow->LockPaletteLock();
|
|
}
|
|
|
|
// Do we have a palette to remove
|
|
|
|
if (m_hPalette != NULL) {
|
|
|
|
if (m_pBaseWindow) {
|
|
// Make sure that the window's palette handle matches
|
|
// our palette handle.
|
|
ASSERT(m_hPalette == m_pBaseWindow->GetPalette());
|
|
|
|
m_pBaseWindow->UnsetPalette();
|
|
}
|
|
|
|
EXECUTE_ASSERT(DeleteObject(m_hPalette));
|
|
m_hPalette = NULL;
|
|
}
|
|
|
|
if (m_pBaseWindow) {
|
|
m_pBaseWindow->UnlockPaletteLock();
|
|
}
|
|
|
|
return NOERROR;
|
|
}
|
|
|
|
|
|
// Called to create a palette for the object, the data structure used by GDI
|
|
// to describe a palette is a LOGPALETTE, this includes a variable number of
|
|
// PALETTEENTRY fields which are the colours, we have to convert the RGBQUAD
|
|
// colour fields we are handed in a BITMAPINFO from the media type into these
|
|
// This handles extraction of palettes from true colour and YUV media formats
|
|
|
|
// We can be passed an optional device name if we wish to prepare a palette
|
|
// for a specific monitor on a multi monitor system
|
|
|
|
HPALETTE CImagePalette::MakePalette(const VIDEOINFOHEADER *pVideoInfo, __in LPSTR szDevice)
|
|
{
|
|
ASSERT(ContainsPalette(pVideoInfo) == TRUE);
|
|
ASSERT(pVideoInfo->bmiHeader.biClrUsed <= iPALETTE_COLORS);
|
|
BITMAPINFOHEADER *pHeader = HEADER(pVideoInfo);
|
|
|
|
const RGBQUAD *pColours; // Pointer to the palette
|
|
LOGPALETTE *lp; // Used to create a palette
|
|
HPALETTE hPalette; // Logical palette object
|
|
|
|
lp = (LOGPALETTE *) new BYTE[sizeof(LOGPALETTE) + SIZE_PALETTE];
|
|
if (lp == NULL) {
|
|
return NULL;
|
|
}
|
|
|
|
// Unfortunately for some hare brained reason a GDI palette entry (a
|
|
// PALETTEENTRY structure) is different to a palette entry from a DIB
|
|
// format (a RGBQUAD structure) so we have to do the field conversion
|
|
// The VIDEOINFO containing the palette may be a true colour type so
|
|
// we use GetBitmapPalette to skip over any bit fields if they exist
|
|
|
|
lp->palVersion = PALVERSION;
|
|
lp->palNumEntries = (USHORT) pHeader->biClrUsed;
|
|
if (lp->palNumEntries == 0) lp->palNumEntries = (1 << pHeader->biBitCount);
|
|
pColours = GetBitmapPalette(pVideoInfo);
|
|
|
|
for (DWORD dwCount = 0;dwCount < lp->palNumEntries;dwCount++) {
|
|
lp->palPalEntry[dwCount].peRed = pColours[dwCount].rgbRed;
|
|
lp->palPalEntry[dwCount].peGreen = pColours[dwCount].rgbGreen;
|
|
lp->palPalEntry[dwCount].peBlue = pColours[dwCount].rgbBlue;
|
|
lp->palPalEntry[dwCount].peFlags = 0;
|
|
}
|
|
|
|
MakeIdentityPalette(lp->palPalEntry, lp->palNumEntries, szDevice);
|
|
|
|
// Create a logical palette
|
|
|
|
hPalette = CreatePalette(lp);
|
|
ASSERT(hPalette != NULL);
|
|
delete[] lp;
|
|
return hPalette;
|
|
}
|
|
|
|
|
|
// GDI does a fair job of compressing the palette entries you give it, so for
|
|
// example if you have five entries with an RGB colour (0,0,0) it will remove
|
|
// all but one of them. When you subsequently draw an image it will map from
|
|
// your logical palette to the compressed device palette. This function looks
|
|
// to see if it is trying to be an identity palette and if so sets the flags
|
|
// field in the PALETTEENTRYs so they remain expanded to boost performance
|
|
|
|
// We can be passed an optional device name if we wish to prepare a palette
|
|
// for a specific monitor on a multi monitor system
|
|
|
|
HRESULT CImagePalette::MakeIdentityPalette(__inout_ecount_full(iColours) PALETTEENTRY *pEntry,INT iColours, __in LPSTR szDevice)
|
|
{
|
|
PALETTEENTRY SystemEntries[10]; // System palette entries
|
|
BOOL bIdentityPalette = TRUE; // Is an identity palette
|
|
ASSERT(iColours <= iPALETTE_COLORS); // Should have a palette
|
|
const int PalLoCount = 10; // First ten reserved colours
|
|
const int PalHiStart = 246; // Last VGA palette entries
|
|
|
|
// Does this have the full colour range
|
|
|
|
if (iColours < 10) {
|
|
return S_FALSE;
|
|
}
|
|
|
|
// Apparently some displays have odd numbers of system colours
|
|
|
|
// Get a DC on the right monitor - it's ugly, but this is the way you have
|
|
// to do it
|
|
HDC hdc;
|
|
if (szDevice == NULL || lstrcmpiLocaleIndependentA(szDevice, "DISPLAY") == 0)
|
|
hdc = CreateDCA("DISPLAY", NULL, NULL, NULL);
|
|
else
|
|
hdc = CreateDCA(NULL, szDevice, NULL, NULL);
|
|
if (NULL == hdc) {
|
|
return E_OUTOFMEMORY;
|
|
}
|
|
INT Reserved = GetDeviceCaps(hdc,NUMRESERVED);
|
|
if (Reserved != 20) {
|
|
DeleteDC(hdc);
|
|
return S_FALSE;
|
|
}
|
|
|
|
// Compare our palette against the first ten system entries. The reason I
|
|
// don't do a memory compare between our two arrays of colours is because
|
|
// I am not sure what will be in the flags fields for the system entries
|
|
|
|
UINT Result = GetSystemPaletteEntries(hdc,0,PalLoCount,SystemEntries);
|
|
for (UINT Count = 0;Count < Result;Count++) {
|
|
if (SystemEntries[Count].peRed != pEntry[Count].peRed ||
|
|
SystemEntries[Count].peGreen != pEntry[Count].peGreen ||
|
|
SystemEntries[Count].peBlue != pEntry[Count].peBlue) {
|
|
bIdentityPalette = FALSE;
|
|
}
|
|
}
|
|
|
|
// And likewise compare against the last ten entries
|
|
|
|
Result = GetSystemPaletteEntries(hdc,PalHiStart,PalLoCount,SystemEntries);
|
|
for (UINT Count = 0;Count < Result;Count++) {
|
|
if (INT(Count) + PalHiStart < iColours) {
|
|
if (SystemEntries[Count].peRed != pEntry[PalHiStart + Count].peRed ||
|
|
SystemEntries[Count].peGreen != pEntry[PalHiStart + Count].peGreen ||
|
|
SystemEntries[Count].peBlue != pEntry[PalHiStart + Count].peBlue) {
|
|
bIdentityPalette = FALSE;
|
|
}
|
|
}
|
|
}
|
|
|
|
// If not an identity palette then return S_FALSE
|
|
|
|
DeleteDC(hdc);
|
|
if (bIdentityPalette == FALSE) {
|
|
return S_FALSE;
|
|
}
|
|
|
|
// Set the non VGA entries so that GDI doesn't map them
|
|
|
|
for (UINT Count = PalLoCount;INT(Count) < min(PalHiStart,iColours);Count++) {
|
|
pEntry[Count].peFlags = PC_NOCOLLAPSE;
|
|
}
|
|
return NOERROR;
|
|
}
|
|
|
|
|
|
// Constructor initialises the VIDEOINFO we keep storing the current display
|
|
// format. The format can be changed at any time, to reset the format held
|
|
// by us call the RefreshDisplayType directly (it's a public method). Since
|
|
// more than one thread will typically call us (ie window threads resetting
|
|
// the type and source threads in the type checking methods) we have a lock
|
|
|
|
CImageDisplay::CImageDisplay()
|
|
{
|
|
RefreshDisplayType(NULL);
|
|
}
|
|
|
|
|
|
|
|
// This initialises the format we hold which contains the display device type
|
|
// We do a conversion on the display device type in here so that when we start
|
|
// type checking input formats we can assume that certain fields have been set
|
|
// correctly, an example is when we make the 16 bit mask fields explicit. This
|
|
// is normally called when we receive WM_DEVMODECHANGED device change messages
|
|
|
|
// The optional szDeviceName parameter tells us which monitor we are interested
|
|
// in for a multi monitor system
|
|
|
|
HRESULT CImageDisplay::RefreshDisplayType(__in_opt LPSTR szDeviceName)
|
|
{
|
|
CAutoLock cDisplayLock(this);
|
|
|
|
// Set the preferred format type
|
|
|
|
ZeroMemory((PVOID)&m_Display,sizeof(VIDEOINFOHEADER)+sizeof(TRUECOLORINFO));
|
|
m_Display.bmiHeader.biSize = sizeof(BITMAPINFOHEADER);
|
|
m_Display.bmiHeader.biBitCount = FALSE;
|
|
|
|
// Get the bit depth of a device compatible bitmap
|
|
|
|
// get caps of whichever monitor they are interested in (multi monitor)
|
|
HDC hdcDisplay;
|
|
// it's ugly, but this is the way you have to do it
|
|
if (szDeviceName == NULL || lstrcmpiLocaleIndependentA(szDeviceName, "DISPLAY") == 0)
|
|
hdcDisplay = CreateDCA("DISPLAY", NULL, NULL, NULL);
|
|
else
|
|
hdcDisplay = CreateDCA(NULL, szDeviceName, NULL, NULL);
|
|
if (hdcDisplay == NULL) {
|
|
ASSERT(FALSE);
|
|
DbgLog((LOG_ERROR,1,TEXT("ACK! Can't get a DC for %hs"),
|
|
szDeviceName ? szDeviceName : "<NULL>"));
|
|
return E_FAIL;
|
|
} else {
|
|
DbgLog((LOG_TRACE,3,TEXT("Created a DC for %s"),
|
|
szDeviceName ? szDeviceName : "<NULL>"));
|
|
}
|
|
HBITMAP hbm = CreateCompatibleBitmap(hdcDisplay,1,1);
|
|
if ( hbm )
|
|
{
|
|
GetDIBits(hdcDisplay,hbm,0,1,NULL,(BITMAPINFO *)&m_Display.bmiHeader,DIB_RGB_COLORS);
|
|
|
|
// This call will get the colour table or the proper bitfields
|
|
GetDIBits(hdcDisplay,hbm,0,1,NULL,(BITMAPINFO *)&m_Display.bmiHeader,DIB_RGB_COLORS);
|
|
DeleteObject(hbm);
|
|
}
|
|
DeleteDC(hdcDisplay);
|
|
|
|
// Complete the display type initialisation
|
|
|
|
ASSERT(CheckHeaderValidity(&m_Display));
|
|
UpdateFormat(&m_Display);
|
|
DbgLog((LOG_TRACE,3,TEXT("New DISPLAY bit depth =%d"),
|
|
m_Display.bmiHeader.biBitCount));
|
|
return NOERROR;
|
|
}
|
|
|
|
|
|
// We assume throughout this code that any bitfields masks are allowed no
|
|
// more than eight bits to store a colour component. This checks that the
|
|
// bit count assumption is enforced and also makes sure that all the bits
|
|
// set are contiguous. We return a boolean TRUE if the field checks out ok
|
|
|
|
BOOL CImageDisplay::CheckBitFields(const VIDEOINFO *pInput)
|
|
{
|
|
DWORD *pBitFields = (DWORD *) BITMASKS(pInput);
|
|
|
|
for (INT iColour = iRED;iColour <= iBLUE;iColour++) {
|
|
|
|
// First of all work out how many bits are set
|
|
|
|
DWORD SetBits = CountSetBits(pBitFields[iColour]);
|
|
if (SetBits > iMAXBITS || SetBits == 0) {
|
|
NOTE1("Bit fields for component %d invalid",iColour);
|
|
return FALSE;
|
|
}
|
|
|
|
// Next work out the number of zero bits prefix
|
|
DWORD PrefixBits = CountPrefixBits(pBitFields[iColour]);
|
|
|
|
// This is going to see if all the bits set are contiguous (as they
|
|
// should be). We know how much to shift them right by from the
|
|
// count of prefix bits. The number of bits set defines a mask, we
|
|
// invert this (ones complement) and AND it with the shifted bit
|
|
// fields. If the result is NON zero then there are bit(s) sticking
|
|
// out the left hand end which means they are not contiguous
|
|
|
|
DWORD TestField = pBitFields[iColour] >> PrefixBits;
|
|
DWORD Mask = ULONG_MAX << SetBits;
|
|
if (TestField & Mask) {
|
|
NOTE1("Bit fields for component %d not contiguous",iColour);
|
|
return FALSE;
|
|
}
|
|
}
|
|
return TRUE;
|
|
}
|
|
|
|
|
|
// This counts the number of bits set in the input field
|
|
|
|
DWORD CImageDisplay::CountSetBits(DWORD Field)
|
|
{
|
|
// This is a relatively well known bit counting algorithm
|
|
|
|
DWORD Count = 0;
|
|
DWORD init = Field;
|
|
|
|
// Until the input is exhausted, count the number of bits
|
|
|
|
while (init) {
|
|
init = init & (init - 1); // Turn off the bottommost bit
|
|
Count++;
|
|
}
|
|
return Count;
|
|
}
|
|
|
|
|
|
// This counts the number of zero bits upto the first one set NOTE the input
|
|
// field should have been previously checked to ensure there is at least one
|
|
// set although if we don't find one set we return the impossible value 32
|
|
|
|
DWORD CImageDisplay::CountPrefixBits(DWORD Field)
|
|
{
|
|
DWORD Mask = 1;
|
|
DWORD Count = 0;
|
|
|
|
while (TRUE) {
|
|
if (Field & Mask) {
|
|
return Count;
|
|
}
|
|
Count++;
|
|
|
|
ASSERT(Mask != 0x80000000);
|
|
if (Mask == 0x80000000) {
|
|
return Count;
|
|
}
|
|
Mask <<= 1;
|
|
}
|
|
}
|
|
|
|
|
|
// This is called to check the BITMAPINFOHEADER for the input type. There are
|
|
// many implicit dependancies between the fields in a header structure which
|
|
// if we validate now make for easier manipulation in subsequent handling. We
|
|
// also check that the BITMAPINFOHEADER matches it's specification such that
|
|
// fields likes the number of planes is one, that it's structure size is set
|
|
// correctly and that the bitmap dimensions have not been set as negative
|
|
|
|
BOOL CImageDisplay::CheckHeaderValidity(const VIDEOINFO *pInput)
|
|
{
|
|
// Check the bitmap width and height are not negative.
|
|
|
|
if (pInput->bmiHeader.biWidth <= 0 ||
|
|
pInput->bmiHeader.biHeight <= 0) {
|
|
NOTE("Invalid bitmap dimensions");
|
|
return FALSE;
|
|
}
|
|
|
|
// Check the compression is either BI_RGB or BI_BITFIELDS
|
|
|
|
if (pInput->bmiHeader.biCompression != BI_RGB) {
|
|
if (pInput->bmiHeader.biCompression != BI_BITFIELDS) {
|
|
NOTE("Invalid compression format");
|
|
return FALSE;
|
|
}
|
|
}
|
|
|
|
// If BI_BITFIELDS compression format check the colour depth
|
|
|
|
if (pInput->bmiHeader.biCompression == BI_BITFIELDS) {
|
|
if (pInput->bmiHeader.biBitCount != 16) {
|
|
if (pInput->bmiHeader.biBitCount != 32) {
|
|
NOTE("BI_BITFIELDS not 16/32 bit depth");
|
|
return FALSE;
|
|
}
|
|
}
|
|
}
|
|
|
|
// Check the assumptions about the layout of the bit fields
|
|
|
|
if (pInput->bmiHeader.biCompression == BI_BITFIELDS) {
|
|
if (CheckBitFields(pInput) == FALSE) {
|
|
NOTE("Bit fields are not valid");
|
|
return FALSE;
|
|
}
|
|
}
|
|
|
|
// Are the number of planes equal to one
|
|
|
|
if (pInput->bmiHeader.biPlanes != 1) {
|
|
NOTE("Number of planes not one");
|
|
return FALSE;
|
|
}
|
|
|
|
// Check the image size is consistent (it can be zero)
|
|
|
|
if (pInput->bmiHeader.biSizeImage != GetBitmapSize(&pInput->bmiHeader)) {
|
|
if (pInput->bmiHeader.biSizeImage) {
|
|
NOTE("Image size incorrectly set");
|
|
return FALSE;
|
|
}
|
|
}
|
|
|
|
// Check the size of the structure
|
|
|
|
if (pInput->bmiHeader.biSize != sizeof(BITMAPINFOHEADER)) {
|
|
NOTE("Size of BITMAPINFOHEADER wrong");
|
|
return FALSE;
|
|
}
|
|
return CheckPaletteHeader(pInput);
|
|
}
|
|
|
|
|
|
// This runs a few simple tests against the palette fields in the input to
|
|
// see if it looks vaguely correct. The tests look at the number of palette
|
|
// colours present, the number considered important and the biCompression
|
|
// field which should always be BI_RGB as no other formats are meaningful
|
|
|
|
BOOL CImageDisplay::CheckPaletteHeader(const VIDEOINFO *pInput)
|
|
{
|
|
// The checks here are for palettised videos only
|
|
|
|
if (PALETTISED(pInput) == FALSE) {
|
|
if (pInput->bmiHeader.biClrUsed) {
|
|
NOTE("Invalid palette entries");
|
|
return FALSE;
|
|
}
|
|
return TRUE;
|
|
}
|
|
|
|
// Compression type of BI_BITFIELDS is meaningless for palette video
|
|
|
|
if (pInput->bmiHeader.biCompression != BI_RGB) {
|
|
NOTE("Palettised video must be BI_RGB");
|
|
return FALSE;
|
|
}
|
|
|
|
// Check the number of palette colours is correct
|
|
|
|
if (pInput->bmiHeader.biClrUsed > PALETTE_ENTRIES(pInput)) {
|
|
NOTE("Too many colours in palette");
|
|
return FALSE;
|
|
}
|
|
|
|
// The number of important colours shouldn't exceed the number used
|
|
|
|
if (pInput->bmiHeader.biClrImportant > pInput->bmiHeader.biClrUsed) {
|
|
NOTE("Too many important colours");
|
|
return FALSE;
|
|
}
|
|
return TRUE;
|
|
}
|
|
|
|
|
|
// Return the format of the video display
|
|
|
|
const VIDEOINFO *CImageDisplay::GetDisplayFormat()
|
|
{
|
|
return &m_Display;
|
|
}
|
|
|
|
|
|
// Return TRUE if the display uses a palette
|
|
|
|
BOOL CImageDisplay::IsPalettised()
|
|
{
|
|
return PALETTISED(&m_Display);
|
|
}
|
|
|
|
|
|
// Return the bit depth of the current display setting
|
|
|
|
WORD CImageDisplay::GetDisplayDepth()
|
|
{
|
|
return m_Display.bmiHeader.biBitCount;
|
|
}
|
|
|
|
|
|
// Initialise the optional fields in a VIDEOINFO. These are mainly to do with
|
|
// the source and destination rectangles and palette information such as the
|
|
// number of colours present. It simplifies our code just a little if we don't
|
|
// have to keep checking for all the different valid permutations in a header
|
|
// every time we want to do anything with it (an example would be creating a
|
|
// palette). We set the base class media type before calling this function so
|
|
// that the media types between the pins match after a connection is made
|
|
|
|
HRESULT CImageDisplay::UpdateFormat(__inout VIDEOINFO *pVideoInfo)
|
|
{
|
|
ASSERT(pVideoInfo);
|
|
|
|
BITMAPINFOHEADER *pbmi = HEADER(pVideoInfo);
|
|
SetRectEmpty(&pVideoInfo->rcSource);
|
|
SetRectEmpty(&pVideoInfo->rcTarget);
|
|
|
|
// Set the number of colours explicitly
|
|
|
|
if (PALETTISED(pVideoInfo)) {
|
|
if (pVideoInfo->bmiHeader.biClrUsed == 0) {
|
|
pVideoInfo->bmiHeader.biClrUsed = PALETTE_ENTRIES(pVideoInfo);
|
|
}
|
|
}
|
|
|
|
// The number of important colours shouldn't exceed the number used, on
|
|
// some displays the number of important colours is not initialised when
|
|
// retrieving the display type so we set the colours used correctly
|
|
|
|
if (pVideoInfo->bmiHeader.biClrImportant > pVideoInfo->bmiHeader.biClrUsed) {
|
|
pVideoInfo->bmiHeader.biClrImportant = PALETTE_ENTRIES(pVideoInfo);
|
|
}
|
|
|
|
// Change the image size field to be explicit
|
|
|
|
if (pVideoInfo->bmiHeader.biSizeImage == 0) {
|
|
pVideoInfo->bmiHeader.biSizeImage = GetBitmapSize(&pVideoInfo->bmiHeader);
|
|
}
|
|
return NOERROR;
|
|
}
|
|
|
|
|
|
// Lots of video rendering filters want code to check proposed formats are ok
|
|
// This checks the VIDEOINFO we are passed as a media type. If the media type
|
|
// is a valid media type then we return NOERROR otherwise E_INVALIDARG. Note
|
|
// however we only accept formats that can be easily displayed in the display
|
|
// so if we are on a 16 bit device we will not accept 24 bit images. The one
|
|
// complexity is that most displays draw 8 bit palettised images efficiently
|
|
// Also if the input format is less colour bits per pixel then we also accept
|
|
|
|
HRESULT CImageDisplay::CheckVideoType(const VIDEOINFO *pInput)
|
|
{
|
|
// First of all check the VIDEOINFOHEADER looks correct
|
|
|
|
if (CheckHeaderValidity(pInput) == FALSE) {
|
|
return E_INVALIDARG;
|
|
}
|
|
|
|
// Virtually all devices support palettised images efficiently
|
|
|
|
if (m_Display.bmiHeader.biBitCount == pInput->bmiHeader.biBitCount) {
|
|
if (PALETTISED(pInput) == TRUE) {
|
|
ASSERT(PALETTISED(&m_Display) == TRUE);
|
|
NOTE("(Video) Type connection ACCEPTED");
|
|
return NOERROR;
|
|
}
|
|
}
|
|
|
|
|
|
// Is the display depth greater than the input format
|
|
|
|
if (m_Display.bmiHeader.biBitCount > pInput->bmiHeader.biBitCount) {
|
|
NOTE("(Video) Mismatch agreed");
|
|
return NOERROR;
|
|
}
|
|
|
|
// Is the display depth less than the input format
|
|
|
|
if (m_Display.bmiHeader.biBitCount < pInput->bmiHeader.biBitCount) {
|
|
NOTE("(Video) Format mismatch");
|
|
return E_INVALIDARG;
|
|
}
|
|
|
|
|
|
// Both input and display formats are either BI_RGB or BI_BITFIELDS
|
|
|
|
ASSERT(m_Display.bmiHeader.biBitCount == pInput->bmiHeader.biBitCount);
|
|
ASSERT(PALETTISED(pInput) == FALSE);
|
|
ASSERT(PALETTISED(&m_Display) == FALSE);
|
|
|
|
// BI_RGB 16 bit representation is implicitly RGB555, and likewise BI_RGB
|
|
// 24 bit representation is RGB888. So we initialise a pointer to the bit
|
|
// fields they really mean and check against the display device format
|
|
// This is only going to be called when both formats are equal bits pixel
|
|
|
|
const DWORD *pInputMask = GetBitMasks(pInput);
|
|
const DWORD *pDisplayMask = GetBitMasks((VIDEOINFO *)&m_Display);
|
|
|
|
if (pInputMask[iRED] != pDisplayMask[iRED] ||
|
|
pInputMask[iGREEN] != pDisplayMask[iGREEN] ||
|
|
pInputMask[iBLUE] != pDisplayMask[iBLUE]) {
|
|
|
|
NOTE("(Video) Bit field mismatch");
|
|
return E_INVALIDARG;
|
|
}
|
|
|
|
NOTE("(Video) Type connection ACCEPTED");
|
|
return NOERROR;
|
|
}
|
|
|
|
|
|
// Return the bit masks for the true colour VIDEOINFO provided
|
|
|
|
const DWORD *CImageDisplay::GetBitMasks(const VIDEOINFO *pVideoInfo)
|
|
{
|
|
static const DWORD FailMasks[] = {0,0,0};
|
|
|
|
if (pVideoInfo->bmiHeader.biCompression == BI_BITFIELDS) {
|
|
return BITMASKS(pVideoInfo);
|
|
}
|
|
|
|
ASSERT(pVideoInfo->bmiHeader.biCompression == BI_RGB);
|
|
|
|
switch (pVideoInfo->bmiHeader.biBitCount) {
|
|
case 16: return bits555;
|
|
case 24: return bits888;
|
|
case 32: return bits888;
|
|
default: return FailMasks;
|
|
}
|
|
}
|
|
|
|
|
|
// Check to see if we can support media type pmtIn as proposed by the output
|
|
// pin - We first check that the major media type is video and also identify
|
|
// the media sub type. Then we thoroughly check the VIDEOINFO type provided
|
|
// As well as the contained VIDEOINFO being correct the major type must be
|
|
// video, the subtype a recognised video format and the type GUID correct
|
|
|
|
HRESULT CImageDisplay::CheckMediaType(const CMediaType *pmtIn)
|
|
{
|
|
// Does this have a VIDEOINFOHEADER format block
|
|
|
|
const GUID *pFormatType = pmtIn->FormatType();
|
|
if (*pFormatType != FORMAT_VideoInfo) {
|
|
NOTE("Format GUID not a VIDEOINFOHEADER");
|
|
return E_INVALIDARG;
|
|
}
|
|
ASSERT(pmtIn->Format());
|
|
|
|
// Check the format looks reasonably ok
|
|
|
|
ULONG Length = pmtIn->FormatLength();
|
|
if (Length < SIZE_VIDEOHEADER) {
|
|
NOTE("Format smaller than a VIDEOHEADER");
|
|
return E_FAIL;
|
|
}
|
|
|
|
VIDEOINFO *pInput = (VIDEOINFO *) pmtIn->Format();
|
|
|
|
// Check the major type is MEDIATYPE_Video
|
|
|
|
const GUID *pMajorType = pmtIn->Type();
|
|
if (*pMajorType != MEDIATYPE_Video) {
|
|
NOTE("Major type not MEDIATYPE_Video");
|
|
return E_INVALIDARG;
|
|
}
|
|
|
|
// Check we can identify the media subtype
|
|
|
|
const GUID *pSubType = pmtIn->Subtype();
|
|
if (GetBitCount(pSubType) == USHRT_MAX) {
|
|
NOTE("Invalid video media subtype");
|
|
return E_INVALIDARG;
|
|
}
|
|
return CheckVideoType(pInput);
|
|
}
|
|
|
|
|
|
// Given a video format described by a VIDEOINFO structure we return the mask
|
|
// that is used to obtain the range of acceptable colours for this type, for
|
|
// example, the mask for a 24 bit true colour format is 0xFF in all cases. A
|
|
// 16 bit 5:6:5 display format uses 0xF8, 0xFC and 0xF8, therefore given any
|
|
// RGB triplets we can AND them with these fields to find one that is valid
|
|
|
|
BOOL CImageDisplay::GetColourMask(__out DWORD *pMaskRed,
|
|
__out DWORD *pMaskGreen,
|
|
__out DWORD *pMaskBlue)
|
|
{
|
|
CAutoLock cDisplayLock(this);
|
|
*pMaskRed = 0xFF;
|
|
*pMaskGreen = 0xFF;
|
|
*pMaskBlue = 0xFF;
|
|
|
|
// If this format is palettised then it doesn't have bit fields
|
|
|
|
if (m_Display.bmiHeader.biBitCount < 16) {
|
|
return FALSE;
|
|
}
|
|
|
|
// If this is a 24 bit true colour display then it can handle all the
|
|
// possible colour component ranges described by a byte. It is never
|
|
// allowed for a 24 bit colour depth image to have BI_BITFIELDS set
|
|
|
|
if (m_Display.bmiHeader.biBitCount == 24) {
|
|
ASSERT(m_Display.bmiHeader.biCompression == BI_RGB);
|
|
return TRUE;
|
|
}
|
|
|
|
// Calculate the mask based on the format's bit fields
|
|
|
|
const DWORD *pBitFields = (DWORD *) GetBitMasks((VIDEOINFO *)&m_Display);
|
|
DWORD *pOutputMask[] = { pMaskRed, pMaskGreen, pMaskBlue };
|
|
|
|
// We know from earlier testing that there are no more than iMAXBITS
|
|
// bits set in the mask and that they are all contiguous. All that
|
|
// therefore remains is to shift them into the correct position
|
|
|
|
for (INT iColour = iRED;iColour <= iBLUE;iColour++) {
|
|
|
|
// This works out how many bits there are and where they live
|
|
|
|
DWORD PrefixBits = CountPrefixBits(pBitFields[iColour]);
|
|
DWORD SetBits = CountSetBits(pBitFields[iColour]);
|
|
|
|
// The first shift moves the bit field so that it is right justified
|
|
// in the DWORD, after which we then shift it back left which then
|
|
// puts the leading bit in the bytes most significant bit position
|
|
|
|
*(pOutputMask[iColour]) = pBitFields[iColour] >> PrefixBits;
|
|
*(pOutputMask[iColour]) <<= (iMAXBITS - SetBits);
|
|
}
|
|
return TRUE;
|
|
}
|
|
|
|
|
|
/* Helper to convert to VIDEOINFOHEADER2
|
|
*/
|
|
STDAPI ConvertVideoInfoToVideoInfo2(__inout AM_MEDIA_TYPE *pmt)
|
|
{
|
|
if (pmt->formattype != FORMAT_VideoInfo) {
|
|
return E_INVALIDARG;
|
|
}
|
|
if (NULL == pmt->pbFormat || pmt->cbFormat < sizeof(VIDEOINFOHEADER)) {
|
|
return E_INVALIDARG;
|
|
}
|
|
VIDEOINFO *pVideoInfo = (VIDEOINFO *)pmt->pbFormat;
|
|
DWORD dwNewSize;
|
|
HRESULT hr = DWordAdd(pmt->cbFormat, sizeof(VIDEOINFOHEADER2) - sizeof(VIDEOINFOHEADER), &dwNewSize);
|
|
if (FAILED(hr)) {
|
|
return hr;
|
|
}
|
|
PVOID pvNew = CoTaskMemAlloc(dwNewSize);
|
|
if (pvNew == NULL) {
|
|
return E_OUTOFMEMORY;
|
|
}
|
|
CopyMemory(pvNew, pmt->pbFormat, FIELD_OFFSET(VIDEOINFOHEADER, bmiHeader));
|
|
ZeroMemory((PBYTE)pvNew + FIELD_OFFSET(VIDEOINFOHEADER, bmiHeader),
|
|
sizeof(VIDEOINFOHEADER2) - sizeof(VIDEOINFOHEADER));
|
|
CopyMemory((PBYTE)pvNew + FIELD_OFFSET(VIDEOINFOHEADER2, bmiHeader),
|
|
pmt->pbFormat + FIELD_OFFSET(VIDEOINFOHEADER, bmiHeader),
|
|
pmt->cbFormat - FIELD_OFFSET(VIDEOINFOHEADER, bmiHeader));
|
|
VIDEOINFOHEADER2 *pVideoInfo2 = (VIDEOINFOHEADER2 *)pvNew;
|
|
pVideoInfo2->dwPictAspectRatioX = (DWORD)pVideoInfo2->bmiHeader.biWidth;
|
|
pVideoInfo2->dwPictAspectRatioY = (DWORD)abs(pVideoInfo2->bmiHeader.biHeight);
|
|
pmt->formattype = FORMAT_VideoInfo2;
|
|
CoTaskMemFree(pmt->pbFormat);
|
|
pmt->pbFormat = (PBYTE)pvNew;
|
|
pmt->cbFormat += sizeof(VIDEOINFOHEADER2) - sizeof(VIDEOINFOHEADER);
|
|
return S_OK;
|
|
}
|
|
|
|
|
|
// Check a media type containing VIDEOINFOHEADER
|
|
STDAPI CheckVideoInfoType(const AM_MEDIA_TYPE *pmt)
|
|
{
|
|
if (NULL == pmt || NULL == pmt->pbFormat) {
|
|
return E_POINTER;
|
|
}
|
|
if (pmt->majortype != MEDIATYPE_Video ||
|
|
pmt->formattype != FORMAT_VideoInfo ||
|
|
pmt->cbFormat < sizeof(VIDEOINFOHEADER)) {
|
|
return VFW_E_TYPE_NOT_ACCEPTED;
|
|
}
|
|
const VIDEOINFOHEADER *pHeader = (const VIDEOINFOHEADER *)pmt->pbFormat;
|
|
if (!ValidateBitmapInfoHeader(
|
|
&pHeader->bmiHeader,
|
|
pmt->cbFormat - FIELD_OFFSET(VIDEOINFOHEADER, bmiHeader))) {
|
|
return VFW_E_TYPE_NOT_ACCEPTED;
|
|
}
|
|
|
|
return S_OK;
|
|
}
|
|
|
|
// Check a media type containing VIDEOINFOHEADER2
|
|
STDAPI CheckVideoInfo2Type(const AM_MEDIA_TYPE *pmt)
|
|
{
|
|
if (NULL == pmt || NULL == pmt->pbFormat) {
|
|
return E_POINTER;
|
|
}
|
|
if (pmt->majortype != MEDIATYPE_Video ||
|
|
pmt->formattype != FORMAT_VideoInfo2 ||
|
|
pmt->cbFormat < sizeof(VIDEOINFOHEADER2)) {
|
|
return VFW_E_TYPE_NOT_ACCEPTED;
|
|
}
|
|
const VIDEOINFOHEADER2 *pHeader = (const VIDEOINFOHEADER2 *)pmt->pbFormat;
|
|
if (!ValidateBitmapInfoHeader(
|
|
&pHeader->bmiHeader,
|
|
pmt->cbFormat - FIELD_OFFSET(VIDEOINFOHEADER2, bmiHeader))) {
|
|
return VFW_E_TYPE_NOT_ACCEPTED;
|
|
}
|
|
|
|
return S_OK;
|
|
}
|