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/**
* @file media_plugin_base.cpp
* @brief Media plugin base class for LLMedia API plugin system
*
* All plugins should be a subclass of MediaPluginBase.
*
* @cond
* $LicenseInfo:firstyear=2008&license=viewerlgpl$
* Second Life Viewer Source Code
* Copyright (C) 2010, Linden Research, Inc.
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation;
* version 2.1 of the License only.
*
* This library 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
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*
* Linden Research, Inc., 945 Battery Street, San Francisco, CA 94111 USA
* $/LicenseInfo$
* @endcond
*/
#include "linden_common.h"
#include "media_plugin_base.h"
// TODO: Make sure that the only symbol exported from this library is LLPluginInitEntryPoint
////////////////////////////////////////////////////////////////////////////////
/// Media plugin constructor.
///
/// @param[in] host_send_func Function for sending messages from plugin to plugin loader shell
/// @param[in] host_user_data Message data for messages from plugin to plugin loader shell
MediaPluginBase::MediaPluginBase(
LLPluginInstance::sendMessageFunction host_send_func,
void *host_user_data )
{
mHostSendFunction = host_send_func;
mHostUserData = host_user_data;
mDeleteMe = false;
mPixels = 0;
mWidth = 0;
mHeight = 0;
mTextureWidth = 0;
mTextureHeight = 0;
mDepth = 0;
mStatus = STATUS_NONE;
}
/**
* Converts current media status enum value into string (STATUS_LOADING into "loading", etc.)
*
* @return Media status string ("loading", "playing", "paused", etc)
*
*/
std::string MediaPluginBase::statusString()
{
std::string result;
switch(mStatus)
{
case STATUS_LOADING: result = "loading"; break;
case STATUS_LOADED: result = "loaded"; break;
case STATUS_ERROR: result = "error"; break;
case STATUS_PLAYING: result = "playing"; break;
case STATUS_PAUSED: result = "paused"; break;
case STATUS_DONE: result = "done"; break;
default:
// keep the empty string
break;
}
return result;
}
/**
* Set media status.
*
* @param[in] status Media status (STATUS_LOADING, STATUS_PLAYING, STATUS_PAUSED, etc)
*
*/
void MediaPluginBase::setStatus(EStatus status)
{
if(mStatus != status)
{
mStatus = status;
sendStatus();
}
}
/**
* Receive message from plugin loader shell.
*
* @param[in] message_string Message string
* @param[in] user_data Message data
*
*/
void MediaPluginBase::staticReceiveMessage(const char *message_string, void **user_data)
{
MediaPluginBase *self = (MediaPluginBase*)*user_data;
if(self != NULL)
{
self->receiveMessage(message_string);
// If the plugin has processed the delete message, delete it.
if(self->mDeleteMe)
{
delete self;
*user_data = NULL;
}
}
}
/**
* Send message to plugin loader shell.
*
* @param[in] message Message data being sent to plugin loader shell
*
*/
void MediaPluginBase::sendMessage(const LLPluginMessage &message)
{
std::string output = message.generate();
mHostSendFunction(output.c_str(), &mHostUserData);
}
/**
* Notifies plugin loader shell that part of display area needs to be redrawn.
*
* @param[in] left Left X coordinate of area to redraw (0,0 is at top left corner)
* @param[in] top Top Y coordinate of area to redraw (0,0 is at top left corner)
* @param[in] right Right X-coordinate of area to redraw (0,0 is at top left corner)
* @param[in] bottom Bottom Y-coordinate of area to redraw (0,0 is at top left corner)
*
*/
void MediaPluginBase::setDirty(int left, int top, int right, int bottom)
{
LLPluginMessage message(LLPLUGIN_MESSAGE_CLASS_MEDIA, "updated");
message.setValueS32("left", left);
message.setValueS32("top", top);
message.setValueS32("right", right);
message.setValueS32("bottom", bottom);
sendMessage(message);
}
/**
* Sends "media_status" message to plugin loader shell ("loading", "playing", "paused", etc.)
*
*/
void MediaPluginBase::sendStatus()
{
LLPluginMessage message(LLPLUGIN_MESSAGE_CLASS_MEDIA, "media_status");
message.setValue("status", statusString());
sendMessage(message);
}
#if LL_WINDOWS
# define LLSYMEXPORT __declspec(dllexport)
#elif LL_LINUX
# define LLSYMEXPORT __attribute__ ((visibility("default")))
#else
# define LLSYMEXPORT /**/
#endif
extern "C"
{
LLSYMEXPORT int LLPluginInitEntryPoint(LLPluginInstance::sendMessageFunction host_send_func, void *host_user_data, LLPluginInstance::sendMessageFunction *plugin_send_func, void **plugin_user_data);
}
/**
* Plugin initialization and entry point. Establishes communication channel for messages between plugin and plugin loader shell. TODO:DOC - Please check!
*
* @param[in] host_send_func Function for sending messages from plugin to plugin loader shell
* @param[in] host_user_data Message data for messages from plugin to plugin loader shell
* @param[out] plugin_send_func Function for plugin to receive messages from plugin loader shell
* @param[out] plugin_user_data Pointer to plugin instance
*
* @return int, where 0=success
*
*/
LLSYMEXPORT int
LLPluginInitEntryPoint(LLPluginInstance::sendMessageFunction host_send_func, void *host_user_data, LLPluginInstance::sendMessageFunction *plugin_send_func, void **plugin_user_data)
{
return init_media_plugin(host_send_func, host_user_data, plugin_send_func, plugin_user_data);
}
#ifdef WIN32
int WINAPI DllEntryPoint( HINSTANCE hInstance, unsigned long reason, void* params )
{
return 1;
}
#endif
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