Adds an example plugin and corresponding changes to

LLMediaPluginTest test app. We do not copy over the
example plugin to the Second Life client plugin dir.

1 files changed, 488 insertions, 0 deletions

diff --git a/indra/media_plugins/example/media_plugin_example.cpp b/indra/media_plugins/example/media_plugin_example.cpp
new file mode 100644
index 0000000000..e873a0d034
--- /dev/null
+++ b/indra/media_plugins/example/media_plugin_example.cpp
@@ -0,0 +1,488 @@
+/**
+ * @file media_plugin_example.cpp
+ * @brief Example plugin for LLMedia API plugin system
+ *
+ * $LicenseInfo:firstyear=2008&license=viewergpl$
+ *
+ * Copyright (c) 2009, Linden Research, Inc.
+ *
+ * Second Life Viewer Source Code
+ * The source code in this file ("Source Code") is provided by Linden Lab
+ * to you under the terms of the GNU General Public License, version 2.0
+ * ("GPL"), unless you have obtained a separate licensing agreement
+ * ("Other License"), formally executed by you and Linden Lab.  Terms of
+ * the GPL can be found in doc/GPL-license.txt in this distribution, or
+ * online at http://secondlife.com/developers/opensource/gplv2
+ *
+ * There are special exceptions to the terms and conditions of the GPL as
+ * it is applied to this Source Code. View the full text of the exception
+ * in the file doc/FLOSS-exception.txt in this software distribution, or
+ * online at http://secondlife.com/developers/opensource/flossexception
+ *
+ * By copying, modifying or distributing this software, you acknowledge
+ * that you have read and understood your obligations described above,
+ * and agree to abide by those obligations.
+ *
+ * ALL LINDEN LAB SOURCE CODE IS PROVIDED "AS IS." LINDEN LAB MAKES NO
+ * WARRANTIES, EXPRESS, IMPLIED OR OTHERWISE, REGARDING ITS ACCURACY,
+ * COMPLETENESS OR PERFORMANCE.
+ * $/LicenseInfo$
+ */
+
+#include "linden_common.h"
+
+#include "llgl.h"
+#include "llplugininstance.h"
+#include "llpluginmessage.h"
+#include "llpluginmessageclasses.h"
+#include "media_plugin_base.h"
+
+#include <time.h>
+
+////////////////////////////////////////////////////////////////////////////////
+//
+class MediaPluginExample :
+		public MediaPluginBase
+{
+	public:
+		MediaPluginExample( LLPluginInstance::sendMessageFunction host_send_func, void *host_user_data );
+		~MediaPluginExample();
+
+		/*virtual*/ void receiveMessage( const char* message_string );
+
+	private:
+		bool init();
+		void update( int milliseconds );
+		void write_pixel( int x, int y, unsigned char r, unsigned char g, unsigned char b );
+		bool mFirstTime;
+
+		time_t mLastUpdateTime;
+		enum Constants { ENumObjects = 10 };
+		unsigned char* mBackgroundPixels;
+		int mColorR[ ENumObjects ];
+		int mColorG[ ENumObjects ];
+		int mColorB[ ENumObjects ];
+		int mXpos[ ENumObjects ];
+		int mYpos[ ENumObjects ];
+		int mXInc[ ENumObjects ];
+		int mYInc[ ENumObjects ];
+		int mBlockSize[ ENumObjects ];
+		bool mMouseButtonDown;
+		bool mStopAction;
+};
+
+////////////////////////////////////////////////////////////////////////////////
+//
+MediaPluginExample::MediaPluginExample( LLPluginInstance::sendMessageFunction host_send_func, void *host_user_data ) :
+	MediaPluginBase( host_send_func, host_user_data )
+{
+	mFirstTime = true;
+	mWidth = 0;
+	mHeight = 0;
+	mDepth = 4;
+	mPixels = 0;
+	mMouseButtonDown = false;
+	mStopAction = false;
+	mLastUpdateTime = 0;
+}
+
+////////////////////////////////////////////////////////////////////////////////
+//
+MediaPluginExample::~MediaPluginExample()
+{
+}
+
+////////////////////////////////////////////////////////////////////////////////
+//
+void MediaPluginExample::receiveMessage( const char* message_string )
+{
+	LLPluginMessage message_in;
+
+	if ( message_in.parse( message_string ) >= 0 )
+	{
+		std::string message_class = message_in.getClass();
+		std::string message_name = message_in.getName();
+
+		if ( message_class == LLPLUGIN_MESSAGE_CLASS_BASE )
+		{
+			if ( message_name == "init" )
+			{
+				LLPluginMessage message( "base", "init_response" );
+				LLSD versions = LLSD::emptyMap();
+				versions[ LLPLUGIN_MESSAGE_CLASS_BASE ] = LLPLUGIN_MESSAGE_CLASS_BASE_VERSION;
+				versions[ LLPLUGIN_MESSAGE_CLASS_MEDIA ] = LLPLUGIN_MESSAGE_CLASS_MEDIA_VERSION;
+				versions[ LLPLUGIN_MESSAGE_CLASS_MEDIA_BROWSER ] = LLPLUGIN_MESSAGE_CLASS_MEDIA_BROWSER_VERSION;
+				message.setValueLLSD( "versions", versions );
+
+				std::string plugin_version = "Example media plugin, Example Version 1.0.0.0";
+				message.setValue( "plugin_version", plugin_version );
+				sendMessage( message );
+
+				// Plugin gets to decide the texture parameters to use.
+				message.setMessage( LLPLUGIN_MESSAGE_CLASS_MEDIA, "texture_params" );
+				message.setValueS32( "default_width", mWidth );
+				message.setValueS32( "default_height", mHeight );
+				message.setValueS32( "depth", mDepth );
+				message.setValueU32( "internalformat", GL_RGBA );
+				message.setValueU32( "format", GL_RGBA );
+				message.setValueU32( "type", GL_UNSIGNED_BYTE );
+				message.setValueBoolean( "coords_opengl", false );
+				sendMessage( message );
+			}
+			else
+			if ( message_name == "idle" )
+			{
+				// no response is necessary here.
+				F64 time = message_in.getValueReal( "time" );
+
+				// Convert time to milliseconds for update()
+				update( time );
+			}
+			else
+			if ( message_name == "cleanup" )
+			{
+				// clean up here
+			}
+			else
+			if ( message_name == "shm_added" )
+			{
+				SharedSegmentInfo info;
+				info.mAddress = message_in.getValuePointer( "address" );
+				info.mSize = ( size_t )message_in.getValueS32( "size" );
+				std::string name = message_in.getValue( "name" );
+
+				mSharedSegments.insert( SharedSegmentMap::value_type( name, info ) );
+
+			}
+			else
+			if ( message_name == "shm_remove" )
+			{
+				std::string name = message_in.getValue( "name" );
+
+				SharedSegmentMap::iterator iter = mSharedSegments.find( name );
+				if( iter != mSharedSegments.end() )
+				{
+					if ( mPixels == iter->second.mAddress )
+					{
+						// This is the currently active pixel buffer.
+						// Make sure we stop drawing to it.
+						mPixels = NULL;
+						mTextureSegmentName.clear();
+					};
+					mSharedSegments.erase( iter );
+				}
+				else
+				{
+					//std::cerr << "MediaPluginExample::receiveMessage: unknown shared memory region!" << std::endl;
+				};
+
+				// Send the response so it can be cleaned up.
+				LLPluginMessage message( "base", "shm_remove_response" );
+				message.setValue( "name", name );
+				sendMessage( message );
+			}
+			else
+			{
+				//std::cerr << "MediaPluginExample::receiveMessage: unknown base message: " << message_name << std::endl;
+			};
+		}
+		else
+		if ( message_class == LLPLUGIN_MESSAGE_CLASS_MEDIA )
+		{
+			if ( message_name == "size_change" )
+			{
+				std::string name = message_in.getValue( "name" );
+				S32 width = message_in.getValueS32( "width" );
+				S32 height = message_in.getValueS32( "height" );
+				S32 texture_width = message_in.getValueS32( "texture_width" );
+				S32 texture_height = message_in.getValueS32( "texture_height" );
+
+				if ( ! name.empty() )
+				{
+					// Find the shared memory region with this name
+					SharedSegmentMap::iterator iter = mSharedSegments.find( name );
+					if ( iter != mSharedSegments.end() )
+					{
+						mPixels = ( unsigned char* )iter->second.mAddress;
+						mWidth = width;
+						mHeight = height;
+
+						mTextureWidth = texture_width;
+						mTextureHeight = texture_height;
+
+						init();
+					};
+				};
+
+				LLPluginMessage message( LLPLUGIN_MESSAGE_CLASS_MEDIA, "size_change_response" );
+				message.setValue( "name", name );
+				message.setValueS32( "width", width );
+				message.setValueS32( "height", height );
+				message.setValueS32( "texture_width", texture_width );
+				message.setValueS32( "texture_height", texture_height );
+				sendMessage( message );
+			}
+			else
+			if ( message_name == "load_uri" )
+			{
+				std::string uri = message_in.getValue( "uri" );
+				if ( ! uri.empty() )
+				{
+				};
+			}
+			else
+			if ( message_name == "mouse_event" )
+			{
+				std::string event = message_in.getValue( "event" );
+				S32 button = message_in.getValueS32( "button" );
+
+				// left mouse button
+				if ( button == 0 )
+				{
+					int mouse_x = message_in.getValueS32( "x" );
+					int mouse_y = message_in.getValueS32( "y" );
+					std::string modifiers = message_in.getValue( "modifiers" );
+
+					if ( event == "move" )
+					{
+						if ( mMouseButtonDown )
+							write_pixel( mouse_x, mouse_y, rand() % 0x80 + 0x80, rand() % 0x80 + 0x80, rand() % 0x80 + 0x80 );
+					}
+					else
+					if ( event == "down" )
+					{
+						mMouseButtonDown = true;
+					}
+					else
+					if ( event == "up" )
+					{
+						mMouseButtonDown = false;
+					}
+					else
+					if ( event == "double_click" )
+					{
+					};
+				};
+			}
+			else
+			if ( message_name == "key_event" )
+			{
+				std::string event = message_in.getValue( "event" );
+				S32 key = message_in.getValueS32( "key" );
+				std::string modifiers = message_in.getValue( "modifiers" );
+
+				if ( event == "down" )
+				{
+					if ( key == ' ')
+					{
+						mLastUpdateTime = 0;
+						update( 0 );
+					};
+				};
+			}
+			else
+			{
+				//std::cerr << "MediaPluginExample::receiveMessage: unknown media message: " << message_string << std::endl;
+			};
+		}
+		else
+		if ( message_class == LLPLUGIN_MESSAGE_CLASS_MEDIA_BROWSER )
+		{
+			if ( message_name == "browse_reload" )
+			{
+				mLastUpdateTime = 0;
+				mFirstTime = true;
+				mStopAction = false;
+				update( 0 );
+			}
+			else
+			if ( message_name == "browse_stop" )
+			{
+				for( int n = 0; n < ENumObjects; ++n )
+					mXInc[ n ] = mYInc[ n ] = 0;
+
+				mStopAction = true;
+				update( 0 );
+			}
+			else
+			{
+				//std::cerr << "MediaPluginExample::receiveMessage: unknown media_browser message: " << message_string << std::endl;
+			};
+		}
+		else
+		{
+			//std::cerr << "MediaPluginExample::receiveMessage: unknown message class: " << message_class << std::endl;
+		};
+	};
+}
+
+////////////////////////////////////////////////////////////////////////////////
+//
+void MediaPluginExample::write_pixel( int x, int y, unsigned char r, unsigned char g, unsigned char b )
+{
+	// make sure we don't write outside the buffer
+	if ( ( x < 0 ) || ( x >= mWidth ) || ( y < 0 ) || ( y >= mHeight ) )
+		return;
+		
+	if ( mBackgroundPixels != NULL )
+	{
+		unsigned char *pixel = mBackgroundPixels;
+		pixel += y * mWidth * mDepth;
+		pixel += ( x * mDepth );
+		pixel[ 0 ] = b;
+		pixel[ 1 ] = g;
+		pixel[ 2 ] = r;
+
+		setDirty( x, y, x + 1, y + 1 );
+	};
+}
+
+////////////////////////////////////////////////////////////////////////////////
+//
+void MediaPluginExample::update( int milliseconds )
+{
+	if ( mWidth < 1 || mWidth > 2048 || mHeight < 1 || mHeight > 2048 )
+		return;
+
+	if ( mPixels == 0 )
+			return;
+
+	if ( mFirstTime )
+	{
+		for( int n = 0; n < ENumObjects; ++n )
+		{
+			mXpos[ n ] = ( mWidth / 2 ) + rand() % ( mWidth / 16 ) - ( mWidth / 32 );
+			mYpos[ n ] = ( mHeight / 2 ) + rand() % ( mHeight / 16 ) - ( mHeight / 32 );
+
+			mColorR[ n ] = rand() % 0x60 + 0x60;
+			mColorG[ n ] = rand() % 0x60 + 0x60;
+			mColorB[ n ] = rand() % 0x60 + 0x60;
+
+			mXInc[ n ] = 0;
+			while ( mXInc[ n ] == 0 )
+				mXInc[ n ] = rand() % 7 - 3;
+
+			mYInc[ n ] = 0;
+			while ( mYInc[ n ] == 0 )
+				mYInc[ n ] = rand() % 9 - 4;
+
+			mBlockSize[ n ] = rand() % 0x30 + 0x10;
+		};
+
+		delete [] mBackgroundPixels;
+				
+		mBackgroundPixels = new unsigned char[ mWidth * mHeight * mDepth ];
+
+		mFirstTime = false;
+	};
+
+	if ( mStopAction )
+		return;
+
+	if ( time( NULL ) > mLastUpdateTime + 3 )
+	{
+		const int num_squares = rand() % 20 + 4;
+		int sqr1_r = rand() % 0x80 + 0x20;
+		int sqr1_g = rand() % 0x80 + 0x20;
+		int sqr1_b = rand() % 0x80 + 0x20;
+		int sqr2_r = rand() % 0x80 + 0x20;
+		int sqr2_g = rand() % 0x80 + 0x20;
+		int sqr2_b = rand() % 0x80 + 0x20;
+
+		for ( int y1 = 0; y1 < num_squares; ++y1 )
+		{
+			for ( int x1 = 0; x1 < num_squares; ++x1 )
+			{
+				int px_start = mWidth * x1 / num_squares;
+				int px_end = ( mWidth * ( x1 + 1 ) ) / num_squares;
+				int py_start = mHeight * y1 / num_squares;
+				int py_end = ( mHeight * ( y1 + 1 ) ) / num_squares;
+
+				for( int y2 = py_start; y2 < py_end; ++y2 )
+				{
+					for( int x2 = px_start; x2 < px_end; ++x2 )
+					{
+						int rowspan = mWidth * mDepth;
+
+						if ( ( y1 % 2 ) ^ ( x1 % 2 ) )
+						{
+							mBackgroundPixels[ y2 * rowspan + x2 * mDepth + 0 ] = sqr1_r;
+							mBackgroundPixels[ y2 * rowspan + x2 * mDepth + 1 ] = sqr1_g;
+							mBackgroundPixels[ y2 * rowspan + x2 * mDepth + 2 ] = sqr1_b;
+						}
+						else
+						{
+							mBackgroundPixels[ y2 * rowspan + x2 * mDepth + 0 ] = sqr2_r;
+							mBackgroundPixels[ y2 * rowspan + x2 * mDepth + 1 ] = sqr2_g;
+							mBackgroundPixels[ y2 * rowspan + x2 * mDepth + 2 ] = sqr2_b;
+						};
+					};
+				};
+			};
+		};
+
+		time( &mLastUpdateTime );
+	};
+
+	memcpy( mPixels, mBackgroundPixels, mWidth * mHeight * mDepth );
+
+	for( int n = 0; n < ENumObjects; ++n )
+	{
+		if ( rand() % 50 == 0 )
+		{
+				mXInc[ n ] = 0;
+				while ( mXInc[ n ] == 0 )
+					mXInc[ n ] = rand() % 7 - 3;
+
+				mYInc[ n ] = 0;
+				while ( mYInc[ n ] == 0 )
+					mYInc[ n ] = rand() % 9 - 4;
+		};
+
+		if ( mXpos[ n ] + mXInc[ n ] < 0 || mXpos[ n ] + mXInc[ n ] >= mWidth - mBlockSize[ n ] )
+			mXInc[ n ] =- mXInc[ n ];
+
+		if ( mYpos[ n ] + mYInc[ n ] < 0 || mYpos[ n ] + mYInc[ n ] >= mHeight - mBlockSize[ n ] )
+			mYInc[ n ] =- mYInc[ n ];
+
+		mXpos[ n ] += mXInc[ n ];
+		mYpos[ n ] += mYInc[ n ];
+
+		for( int y = 0; y < mBlockSize[ n ]; ++y )
+		{
+			for( int x = 0; x < mBlockSize[ n ]; ++x )
+			{
+				mPixels[ ( mXpos[ n ] + x ) * mDepth + ( mYpos[ n ] + y ) * mDepth * mWidth + 0 ] = mColorR[ n ];
+				mPixels[ ( mXpos[ n ] + x ) * mDepth + ( mYpos[ n ] + y ) * mDepth * mWidth + 1 ] = mColorG[ n ];
+				mPixels[ ( mXpos[ n ] + x ) * mDepth + ( mYpos[ n ] + y ) * mDepth * mWidth + 2 ] = mColorB[ n ];
+			};
+		};
+	};
+
+	setDirty( 0, 0, mWidth, mHeight );
+};
+
+////////////////////////////////////////////////////////////////////////////////
+//
+bool MediaPluginExample::init()
+{
+	LLPluginMessage message( LLPLUGIN_MESSAGE_CLASS_MEDIA, "name_text" );
+	message.setValue( "name", "Example Plugin" );
+	sendMessage( message );
+
+	return true;
+};
+
+////////////////////////////////////////////////////////////////////////////////
+//
+int init_media_plugin( LLPluginInstance::sendMessageFunction host_send_func,
+						void* host_user_data,
+						LLPluginInstance::sendMessageFunction *plugin_send_func,
+						void **plugin_user_data )
+{
+	MediaPluginExample* self = new MediaPluginExample( host_send_func, host_user_data );
+	*plugin_send_func = MediaPluginExample::staticReceiveMessage;
+	*plugin_user_data = ( void* )self;
+
+	return 0;
+}