Imported existing code
This commit is contained in:
Hazim Gazov
210
indra/media_plugins/base/media_plugin_base.cpp
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210
indra/media_plugins/base/media_plugin_base.cpp
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/**
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* @file media_plugin_base.cpp
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* @brief Media plugin base class for LLMedia API plugin system
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*
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* All plugins should be a subclass of MediaPluginBase.
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*
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* $LicenseInfo:firstyear=2008&license=viewergpl$
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*
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* Copyright (c) 2008-2009, Linden Research, Inc.
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*
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* Second Life Viewer Source Code
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* The source code in this file ("Source Code") is provided by Linden Lab
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* to you under the terms of the GNU General Public License, version 2.0
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* ("GPL"), unless you have obtained a separate licensing agreement
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* ("Other License"), formally executed by you and Linden Lab. Terms of
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* the GPL can be found in doc/GPL-license.txt in this distribution, or
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* online at http://secondlifegrid.net/programs/open_source/licensing/gplv2
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*
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* There are special exceptions to the terms and conditions of the GPL as
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* it is applied to this Source Code. View the full text of the exception
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* in the file doc/FLOSS-exception.txt in this software distribution, or
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* online at
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* http://secondlifegrid.net/programs/open_source/licensing/flossexception
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*
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* By copying, modifying or distributing this software, you acknowledge
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* that you have read and understood your obligations described above,
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* and agree to abide by those obligations.
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*
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* ALL LINDEN LAB SOURCE CODE IS PROVIDED "AS IS." LINDEN LAB MAKES NO
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* WARRANTIES, EXPRESS, IMPLIED OR OTHERWISE, REGARDING ITS ACCURACY,
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* COMPLETENESS OR PERFORMANCE.
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* $/LicenseInfo$
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*/
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#include "linden_common.h"
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#include "media_plugin_base.h"
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// TODO: Make sure that the only symbol exported from this library is LLPluginInitEntryPoint
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////////////////////////////////////////////////////////////////////////////////
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/// Media plugin constructor.
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///
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/// @param[in] host_send_func Function for sending messages from plugin to plugin loader shell
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/// @param[in] host_user_data Message data for messages from plugin to plugin loader shell
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MediaPluginBase::MediaPluginBase(
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LLPluginInstance::sendMessageFunction host_send_func,
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void *host_user_data )
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{
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mHostSendFunction = host_send_func;
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mHostUserData = host_user_data;
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mDeleteMe = false;
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mPixels = 0;
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mWidth = 0;
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mHeight = 0;
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mTextureWidth = 0;
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mTextureHeight = 0;
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mDepth = 0;
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mStatus = STATUS_NONE;
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}
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/**
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* Converts current media status enum value into string (STATUS_LOADING into "loading", etc.)
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*
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* @return Media status string ("loading", "playing", "paused", etc)
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*
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*/
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std::string MediaPluginBase::statusString()
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{
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std::string result;
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switch(mStatus)
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{
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case STATUS_LOADING: result = "loading"; break;
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case STATUS_LOADED: result = "loaded"; break;
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case STATUS_ERROR: result = "error"; break;
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case STATUS_PLAYING: result = "playing"; break;
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case STATUS_PAUSED: result = "paused"; break;
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case STATUS_DONE: result = "done"; break;
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default:
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// keep the empty string
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break;
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}
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return result;
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}
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/**
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* Set media status.
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*
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* @param[in] status Media status (STATUS_LOADING, STATUS_PLAYING, STATUS_PAUSED, etc)
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*
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*/
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void MediaPluginBase::setStatus(EStatus status)
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{
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if(mStatus != status)
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{
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mStatus = status;
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sendStatus();
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}
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}
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/**
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* Receive message from plugin loader shell.
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*
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* @param[in] message_string Message string
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* @param[in] user_data Message data
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*
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*/
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void MediaPluginBase::staticReceiveMessage(const char *message_string, void **user_data)
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{
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MediaPluginBase *self = (MediaPluginBase*)*user_data;
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if(self != NULL)
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{
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self->receiveMessage(message_string);
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// If the plugin has processed the delete message, delete it.
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if(self->mDeleteMe)
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{
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delete self;
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*user_data = NULL;
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}
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}
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}
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/**
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* Send message to plugin loader shell.
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*
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* @param[in] message Message data being sent to plugin loader shell
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*
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*/
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void MediaPluginBase::sendMessage(const LLPluginMessage &message)
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{
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std::string output = message.generate();
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mHostSendFunction(output.c_str(), &mHostUserData);
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}
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/**
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* Notifies plugin loader shell that part of display area needs to be redrawn.
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*
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* @param[in] left Left X coordinate of area to redraw (0,0 is at top left corner)
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* @param[in] top Top Y coordinate of area to redraw (0,0 is at top left corner)
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* @param[in] right Right X-coordinate of area to redraw (0,0 is at top left corner)
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* @param[in] bottom Bottom Y-coordinate of area to redraw (0,0 is at top left corner)
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*
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*/
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void MediaPluginBase::setDirty(int left, int top, int right, int bottom)
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{
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LLPluginMessage message(LLPLUGIN_MESSAGE_CLASS_MEDIA, "updated");
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message.setValueS32("left", left);
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message.setValueS32("top", top);
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message.setValueS32("right", right);
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message.setValueS32("bottom", bottom);
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sendMessage(message);
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}
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/**
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* Sends "media_status" message to plugin loader shell ("loading", "playing", "paused", etc.)
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*
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*/
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void MediaPluginBase::sendStatus()
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{
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LLPluginMessage message(LLPLUGIN_MESSAGE_CLASS_MEDIA, "media_status");
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message.setValue("status", statusString());
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sendMessage(message);
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}
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#if LL_WINDOWS
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# define LLSYMEXPORT __declspec(dllexport)
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#elif LL_LINUX
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# define LLSYMEXPORT __attribute__ ((visibility("default")))
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#else
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# define LLSYMEXPORT /**/
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#endif
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extern "C"
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{
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LLSYMEXPORT int LLPluginInitEntryPoint(LLPluginInstance::sendMessageFunction host_send_func, void *host_user_data, LLPluginInstance::sendMessageFunction *plugin_send_func, void **plugin_user_data);
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}
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/**
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* Plugin initialization and entry point. Establishes communication channel for messages between plugin and plugin loader shell. TODO:DOC - Please check!
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*
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* @param[in] host_send_func Function for sending messages from plugin to plugin loader shell
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* @param[in] host_user_data Message data for messages from plugin to plugin loader shell
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* @param[out] plugin_send_func Function for plugin to receive messages from plugin loader shell
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* @param[out] plugin_user_data Pointer to plugin instance
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*
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* @return int, where 0=success
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*
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*/
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LLSYMEXPORT int
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LLPluginInitEntryPoint(LLPluginInstance::sendMessageFunction host_send_func, void *host_user_data, LLPluginInstance::sendMessageFunction *plugin_send_func, void **plugin_user_data)
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{
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return init_media_plugin(host_send_func, host_user_data, plugin_send_func, plugin_user_data);
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}
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#ifdef WIN32
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int WINAPI DllEntryPoint( HINSTANCE hInstance, unsigned long reason, void* params )
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{
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return 1;
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}
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#endif
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