diff options
Diffstat (limited to 'tinyDSHOW/src/DSDisplayOverlay.VMR.cxx')
| -rw-r--r-- | tinyDSHOW/src/DSDisplayOverlay.VMR.cxx | 179 |
1 files changed, 179 insertions, 0 deletions
diff --git a/tinyDSHOW/src/DSDisplayOverlay.VMR.cxx b/tinyDSHOW/src/DSDisplayOverlay.VMR.cxx new file mode 100644 index 0000000..37b0b11 --- /dev/null +++ b/tinyDSHOW/src/DSDisplayOverlay.VMR.cxx @@ -0,0 +1,179 @@ +/*
+* Copyright (C) 2009-2010 Mamadou Diop.
+*
+* Contact: Mamadou Diop <diopmamadou(at)doubango.org>
+*
+* This file is part of Open Source Doubango Framework.
+*
+* DOUBANGO is free software: you can redistribute it and/or modify
+* it under the terms of the GNU General Public License as published by
+* the Free Software Foundation, either version 3 of the License, or
+* (at your option) any later version.
+*
+* DOUBANGO is distributed in the hope that it will be useful,
+* but WITHOUT ANY WARRANTY; without even the implied warranty of
+* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+* GNU General Public License for more details.
+*
+* You should have received a copy of the GNU General Public License
+* along with DOUBANGO.
+*
+*/
+#if defined(VMR)
+
+#include <internals/DSDisplayOverlay.h>
+#include <internals/DSDisplayGraph.h>
+#include <internals/DSUtils.h>
+#include "../../resource.h"
+
+using namespace std;
+
+#define ALPHA_VALUE_START 0.8f
+#define ALPHA_VALUE_STOP 0.0f
+
+
+// Hack to get module of the current code
+// Only works with Microsoft Linker and could break in the future
+EXTERN_C IMAGE_DOS_HEADER __ImageBase;
+
+
+DSDisplayOverlay::DSDisplayOverlay()
+{
+ this->window = NULL;
+ this->hdcBmp = NULL;
+ this->hbmOld = NULL;
+}
+
+DSDisplayOverlay::~DSDisplayOverlay()
+{
+}
+
+void DSDisplayOverlay::attach(HWND parent, DSDisplayGraph *graph)
+{
+ HRESULT hr;
+
+ // Gets the handle of the parent and the graph
+ this->window = parent;
+ this->displayGraph = graph;
+
+ if (this->window)
+ {
+ // Hack to get module of the current code
+ TCHAR *modulePath = (TCHAR *) calloc(255, sizeof(TCHAR));
+ GetModuleFileName((HINSTANCE)&__ImageBase, modulePath, 255);
+ HMODULE module = GetModuleHandle(modulePath);
+ delete[] modulePath;
+ if (!module)
+ {
+ cout << "Failed to get current module";
+ return;
+ }
+
+ HBITMAP bitmap = LoadBitmap(module, MAKEINTRESOURCE(IDB_BITMAP_OVERLAY));
+ if (!bitmap)
+ {
+ cout << "Failed to load overlay bitmap" << endl;
+ return;
+ }
+
+ RECT rect;
+ hr = GetWindowRect(this->window, &rect);
+ if (FAILED(hr))
+ {
+ cout << "Failed to get window size" << endl;
+ return;
+ }
+
+ BITMAP bm;
+ HDC hdc = GetDC(this->window);
+ this->hdcBmp = CreateCompatibleDC(hdc);
+ ReleaseDC(this->window, hdc);
+
+ GetObject(bitmap, sizeof(bm), &bm);
+ this->hbmOld= (HBITMAP) SelectObject(this->hdcBmp, bitmap);
+
+ ZeroMemory(&this->alphaBitmap, sizeof(VMRALPHABITMAP));
+ this->alphaBitmap.dwFlags = VMRBITMAP_HDC | VMRBITMAP_SRCCOLORKEY;
+ this->alphaBitmap.hdc = this->hdcBmp;
+ this->alphaBitmap.clrSrcKey = 0x00FF00FF;
+ // Source rectangle
+ this->alphaBitmap.rSrc.left = 0;
+ this->alphaBitmap.rSrc.top = 0;
+ this->alphaBitmap.rSrc.right = bm.bmWidth;
+ this->alphaBitmap.rSrc.bottom = bm.bmHeight;
+ // Destination rectangle
+ this->alphaBitmap.rDest.left = (rect.right - rect.left - bm.bmWidth) / 2.0;
+ this->alphaBitmap.rDest.top = (rect.bottom - rect.top - bm.bmHeight) / 2.0;
+ this->alphaBitmap.rDest.right = this->alphaBitmap.rDest.left + bm.bmWidth;
+ this->alphaBitmap.rDest.bottom = this->alphaBitmap.rDest.top + bm.bmHeight;
+ this->alphaBitmap.rDest.left /= (rect.right - rect.left);
+ this->alphaBitmap.rDest.top /= (rect.bottom - rect.top);
+ this->alphaBitmap.rDest.right /= (rect.right - rect.left);
+ this->alphaBitmap.rDest.bottom /= (rect.bottom - rect.top);
+ // Alpha value for start
+ this->alphaBitmap.fAlpha = ALPHA_VALUE_START;
+
+ }
+}
+
+void DSDisplayOverlay::detach()
+{
+ // Clean up
+ DeleteObject(SelectObject(this->hdcBmp, this->hbmOld));
+ DeleteDC(this->hdcBmp);
+
+ this->hdcBmp = NULL;
+ this->hbmOld = NULL;
+ this->displayGraph = NULL;
+ this->window = NULL;
+}
+
+void DSDisplayOverlay::show(int value)
+{
+ // Store the ticks to count down
+ this->ticks = value;
+
+ // Compute alpha value decrement
+ this->alphaStep = (this->ticks > 0) ? ((ALPHA_VALUE_START - ALPHA_VALUE_STOP) / this->ticks) : 0;
+ this->alphaBitmap.fAlpha = ALPHA_VALUE_START;
+
+ this->internalUpdate();
+}
+
+void DSDisplayOverlay::update()
+{
+ if (this->displayGraph && (this->ticks > 0))
+ {
+ this->ticks--;
+
+ // Be sure alpha is in 0.0 .. 1.0 range.
+ float value = this->alphaBitmap.fAlpha;
+ value -= this->alphaStep;
+ this->alphaBitmap.fAlpha = (value >= 0.0f) ? value : 0.0f;
+
+ this->internalUpdate();
+ }
+}
+
+void DSDisplayOverlay::internalUpdate()
+{
+ HRESULT hr;
+
+ if (this->ticks > 0)
+ {
+ this->alphaBitmap.dwFlags = VMRBITMAP_HDC | VMRBITMAP_SRCCOLORKEY;
+ }
+ else
+ {
+ this->alphaBitmap.dwFlags = VMRBITMAP_DISABLE;
+ }
+
+ hr = this->displayGraph->getMixerBitmap()->SetAlphaBitmap(&this->alphaBitmap);
+ if (FAILED(hr))
+ {
+ cout << "Failed to mix overylay (" << hr << ")" << endl;
+ return;
+ }
+}
+
+#endif
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