[Performous-commit] Tapio Vierros : Crude webcam background through OpenCV.

[Tapio V. <aa...@us...>]

Module: performous
Branch: master
Commit: 9552dbc7a104e7110cce99f4ff8757180fbe28f8

Author: Tapio Vierros <tap...@gm...>
Date:   Sun May  9 18:06:07 2010 +0300

Crude webcam background through OpenCV.

* OpenCV CMake script is very much broken.
* Colors are b0rked (probably wrong component order).
* Webcam video framerate is very slow to keep overall fps playable.

---

 cmake/Modules/FindOpenCV.cmake |   28 ++++++++++++++++++++++++++++
 game/CMakeLists.txt            |    5 ++++-
 game/screen_sing.cc            |    3 +++
 game/screen_sing.hh            |    5 +++--
 game/webcam.hh                 |   39 +++++++++++++++++++++++++++++++++++++++
 5 files changed, 77 insertions(+), 3 deletions(-)

diff --git a/cmake/Modules/FindOpenCV.cmake b/cmake/Modules/FindOpenCV.cmake
new file mode 100644
index 0000000..5f71597
--- /dev/null
+++ b/cmake/Modules/FindOpenCV.cmake
@@ -0,0 +1,28 @@
+# - Try to find OpenCV
+# Once done, this will define
+#
+#  OpenCV_FOUND - system has OpenCV
+#  OpenCV_INCLUDE_DIRS - the OpenCV include directories
+#  OpenCV_LIBRARIES - link these to use OpenCV
+#
+# See documentation on how to write CMake scripts at
+# http://www.cmake.org/Wiki/CMake:How_To_Find_Libraries
+
+include(LibFindMacros)
+
+
+find_path(OpenCV_INCLUDE_DIR
+  NAMES cv.h cv.hpp
+  PATHS ${OpenCV_INCLUDE_DIRS}
+  PATH_SUFFIXES opencv
+)
+
+find_library(OpenCV_LIBRARY
+  NAMES cv highgui highgui4 libcv.a OpenCV opencv CV
+  PATHS ${OpenCV_PKGCONF_LIBRARY_DIRS}
+)
+
+set(OpenCV_PROCESS_INCLUDES OpenCV_INCLUDE_DIR)
+set(OpenCV_PROCESS_LIBS OpenCV_LIBRARY)
+libfind_process(OpenCV)
+
diff --git a/game/CMakeLists.txt b/game/CMakeLists.txt
index abb6532..ee87468 100644
--- a/game/CMakeLists.txt
+++ b/game/CMakeLists.txt
@@ -79,13 +79,16 @@ else()
 endif()
 
 # Find all the libs that don't require extra parameters
-foreach(lib ${OUR_LIBS} SDL PangoCairo LibRSVG LibXML++ GLEW AVFormat SWScale OpenGL Z Jpeg Png)
+foreach(lib ${OUR_LIBS} SDL PangoCairo LibRSVG LibXML++ GLEW AVFormat SWScale OpenGL Z Jpeg Png OpenCV)
 	find_package(${lib} REQUIRED)
 	include_directories(${${lib}_INCLUDE_DIRS})
 	list(APPEND LIBS ${${lib}_LIBRARIES})
 	add_definitions(${${lib}_DEFINITIONS})
 endforeach(lib)
 
+	include_directories(${OpenCV_INCLUDE_DIR})
+	list(APPEND LIBS ${OpenCV_cv_LIBRARY} ${OpenCV_cvcore_LIBRARY} ${OpenCV_highgui_LIBRARY})
+
 find_package(Gettext)
 if(Gettext_FOUND)
 	include_directories(${Gettext_INCLUDE_DIRS})
diff --git a/game/screen_sing.cc b/game/screen_sing.cc
index f74677a..8b0f914 100644
--- a/game/screen_sing.cc
+++ b/game/screen_sing.cc
@@ -307,6 +307,9 @@ void ScreenSing::draw() {
 		theme->bg_top.draw();
 	}
 
+	// Webcam image
+	m_cam.render(time);
+
 	if( !m_dancers.empty() ) {
 		danceLayout(time);
 		//m_layout_singer->draw(time, LayoutSinger::LEFT);
diff --git a/game/screen_sing.hh b/game/screen_sing.hh
index 87cc33c..b7e4f68 100644
--- a/game/screen_sing.hh
+++ b/game/screen_sing.hh
@@ -15,7 +15,7 @@
 #include "opengl_text.hh"
 #include "progressbar.hh"
 #include "guitargraph.hh"
-
+#include "webcam.hh"
 #include "screen_players.hh"
 
 class Players;
@@ -50,7 +50,7 @@ class ScreenSing: public Screen {
   public:
 	/// constructor
 	ScreenSing(std::string const& name, Audio& audio, Capture& capture, Database& database, Backgrounds& bgs):
-	  Screen(name), m_audio(audio), m_capture(capture), m_database(database), m_backgrounds(bgs), m_latencyAV(), m_only_singers_alive(true)
+	  Screen(name), m_audio(audio), m_capture(capture), m_database(database), m_backgrounds(bgs), m_latencyAV(), m_only_singers_alive(true), m_cam()
 	{}
 	void enter();
 	void exit();
@@ -91,5 +91,6 @@ class ScreenSing: public Screen {
 	boost::shared_ptr<ThemeSing> theme;
 	AnimValue m_quitTimer;
 	bool m_only_singers_alive;
+	Webcam m_cam;
 };
 
diff --git a/game/webcam.hh b/game/webcam.hh
new file mode 100644
index 0000000..d90e31a
--- /dev/null
+++ b/game/webcam.hh
@@ -0,0 +1,39 @@
+
+#include <cv.h>
+#include <highgui.h>
+
+#include "glutil.hh"
+#include "surface.hh"
+
+class Webcam {
+  public:
+	Webcam(int cam_id = -1): m_capture(NULL), m_timestamp(0) {
+		m_capture = cvCaptureFromCAM(cam_id);
+		if (!m_capture) {
+			std::cout << "Could not initialize capturing!" << std::endl;
+			return;
+		}
+	}
+
+	~Webcam() { cvReleaseCapture(&m_capture); }
+
+	void render(double time) {
+		if (!m_capture) return;
+		IplImage* frame = 0;
+		if (time > m_timestamp + 0.5) {
+			frame = cvQueryFrame(m_capture);
+			if (!frame) return;
+			m_surface.load(frame->width, frame->height, pix::RGB, (const unsigned char*)frame->imageData);
+			m_timestamp = time;
+		}
+		m_surface.draw();
+	}
+
+	Dimensions& dimensions() { return m_surface.dimensions; }
+	Dimensions const& dimensions() const { return m_surface.dimensions; }
+
+  private:
+	CvCapture* m_capture;
+	Surface m_surface;
+	double m_timestamp;
+};