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/*
Converts a synchronous plugin into an asynchronous one.
-------------------
Copyright:
(C) 2004 by Gary Cramblitt <garycramblitt@comcast.net>
-------------------
Original author: Gary Cramblitt <garycramblitt@comcast.net>
This program 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 2 of the License, or
(at your option) any later version.
This program 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 this program; if not, write to the Free Software
Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
******************************************************************************/
#ifndef _THREADEDPLUGIN_H_
#define _THREADEDPLUGIN_H_
#include <tqthread.h>
#include <tqmutex.h>
#include <tqwaitcondition.h>
#include "pluginproc.h"
class Speaker;
class ThreadedPlugIn : public PlugInProc, public TQThread
{
public:
enum pluginAction
{
paNone = 0,
paSayText = 1,
paSynthText = 2
};
/**
* Constructor.
*/
ThreadedPlugIn(PlugInProc* plugin, TQObject *parent = 0, const char *name = 0);
/**
* Destructor.
*/
virtual ~ThreadedPlugIn();
/**
* Initializate the speech plugin.
*/
virtual bool init(TDEConfig *config, const TQString &configGroup);
/**
* Say a text. Synthesize and audibilize it.
* @param text The text to be spoken.
*
* If the plugin supports asynchronous operation, it should return immediately
* and emit sayFinished signal when synthesis and audibilizing is finished.
*/
virtual void sayText(const TQString &text);
/**
* Synthesize text into an audio file, but do not send to the audio device.
* @param text The text to be synthesized.
* @param suggestedFilename Full pathname of file to create. The plugin
* may ignore this parameter and choose its own
* filename. KTTSD will query the generated
* filename using getFilename().
*
* If the plugin supports asynchronous operation, it should return immediately
* and emit synthFinished signal when synthesis is completed.
*/
virtual void synthText(const TQString &text, const TQString &suggestedFilename);
/**
* Get the generated audio filename from synthText.
* @return Name of the audio file the plugin generated.
* Null if no such file.
*
* The plugin must not re-use the filename.
*/
virtual TQString getFilename();
/**
* Stop current operation (saying or synthesizing text).
* This function only makes sense in asynchronus modes.
* The plugin should return to the psIdle state.
*/
virtual void stopText();
/**
* Return the current state of the plugin.
* This function only makes sense in asynchronous mode.
* @return The pluginState of the plugin.
*
* @ref pluginState
*/
virtual pluginState getState();
/**
* Acknowleges a finished state and resets the plugin state to psIdle.
*
* If the plugin is not in state psFinished, nothing happens.
* The plugin may use this call to do any post-processing cleanup,
* for example, blanking the stored filename (but do not delete the file).
* Calling program should call getFilename prior to ackFinished.
*/
virtual void ackFinished();
/**
* Returns True if the plugin supports asynchronous processing,
* i.e., returns immediately from sayText or synthText.
* @return True if this plugin supports asynchronous processing.
*/
virtual bool supportsAsync();
/**
* Returns True if the plugin supports synthText method,
* i.e., is able to synthesize text to a sound file without
* audibilizing the text.
* @return True if this plugin supports synthText method.
*/
virtual bool supportsSynth();
protected:
/**
* Base function, where the thread will start.
*/
virtual void run();
private:
/**
* Waits for the thread to go to sleep.
*/
void waitThreadNotBusy();
/**
* The plugin we wrap.
*/
PlugInProc* m_plugin;
/**
* An action requested of the plugin.
*/
pluginAction m_action;
/**
* A text buffer to go with an action (if applicable).
*/
TQString m_text;
/**
* Current state of the plugin.
*/
volatile pluginState m_state;
/**
* Mutext for accessing state variable.
*/
TQMutex m_stateMutex;
/**
* True when stopText was called but the plugin did not stop.
*/
bool m_waitingStop;
/**
* Locked when thread is running.
*/
TQMutex m_threadRunningMutex;
/**
* Filename for generated synthesized text.
*/
TQString m_filename;
/**
* Thread wait condition.
*/
TQWaitCondition m_waitCondition;
/**
* Thread exit flag.
*/
volatile bool m_requestExit;
/**
* Whether wrapped plugin supports separate synthesis.
*/
bool m_supportsSynth;
};
#endif // _THREADEDPLUGIN_H_
|
