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363 lines
12 KiB
363 lines
12 KiB
/***************************************************** vim:set ts=4 sw=4 sts=4:
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Main speaking functions for the Festival (Interactive) Plug in
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-------------------
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Copyright:
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(C) 2004 by Gary Cramblitt <garycramblitt@comcast.net>
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-------------------
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Original author: Gary Cramblitt <garycramblitt@comcast.net>
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
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******************************************************************************/
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#ifndef _FESTIVALINTPROC_H_
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#define _FESTIVALINTPROC_H_
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#include <tqstringlist.h>
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#include <tqmutex.h>
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#include <kprocess.h>
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#include <pluginproc.h>
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class TQTextCodec;
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class FestivalIntProc : public PlugInProc{
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Q_OBJECT
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public:
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enum SupportsSSML {
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ssUnknown,
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ssYes,
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ssNo
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};
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/**
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* Constructor
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*/
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FestivalIntProc( TQObject* parent = 0, const char* name = 0, const TQStringList &args = TQStringList());
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/**
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* Destructor
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*/
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virtual ~FestivalIntProc();
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/**
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* Initializate the speech engine.
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* @param config Settings object.
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* @param configGroup Settings group.
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*/
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virtual bool init(TDEConfig *config, const TQString &configGroup);
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/**
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* Returns true when festival is ready to speak a sentence.
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*/
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bool isReady();
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/**
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* Say a text string.
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* @param text The text to speak.
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*/
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virtual void sayText(const TQString &text);
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/**
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* Synthesize text into an audio file, but do not send to the audio device.
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* @param text The text to be synthesized.
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* @param suggestedFilename Full pathname of file to create. The plugin
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* may ignore this parameter and choose its own
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* filename. KTTSD will query the generated
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* filename using getFilename().
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*
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* If the plugin supports asynchronous operation, it should return immediately
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* and emit @ref synthFinished signal when synthesis is completed.
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* It must also implement the @ref getState method, which must return
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* psFinished, when synthesis is completed.
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*/
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virtual void synthText(const TQString &text, const TQString &suggestedFilename);
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/**
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* Get the generated audio filename from call to @ref synthText.
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* @return Name of the audio file the plugin generated.
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* Null if no such file.
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*
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* The plugin must not re-use or delete the filename. The file may not
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* be locked when this method is called. The file will be deleted when
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* KTTSD is finished using it.
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*/
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virtual TQString getFilename();
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/**
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* Stop current operation (saying or synthesizing text).
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* Important: This function may be called from a thread different from the
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* one that called sayText or synthText.
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* If the plugin cannot stop an in-progress @ref sayText or
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* @ref synthText operation, it must not block waiting for it to complete.
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* Instead, return immediately.
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*
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* If a plugin returns before the operation has actually been stopped,
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* the plugin must emit the @ref stopped signal when the operation has
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* actually stopped.
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*
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* The plugin should change to the psIdle state after stopping the
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* operation.
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*/
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virtual void stopText();
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/**
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* Return the current state of the plugin.
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* This function only makes sense in asynchronous mode.
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* @return The pluginState of the plugin.
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*
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* @see pluginState
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*/
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virtual pluginState getState();
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/**
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* Acknowledges a finished state and resets the plugin state to psIdle.
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*
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* If the plugin is not in state psFinished, nothing happens.
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* The plugin may use this call to do any post-processing cleanup,
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* for example, blanking the stored filename (but do not delete the file).
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* Calling program should call getFilename prior to ackFinished.
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*/
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virtual void ackFinished();
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/**
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* Returns True if the plugin supports asynchronous processing,
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* i.e., returns immediately from sayText or synthText.
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* @return True if this plugin supports asynchronous processing.
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*
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* If the plugin returns True, it must also implement @ref getState .
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* It must also emit @ref sayFinished or @ref synthFinished signals when
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* saying or synthesis is completed.
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*/
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virtual bool supportsAsync();
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/**
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* Returns True if the plugin supports synthText method,
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* i.e., is able to synthesize text to a sound file without
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* audibilizing the text.
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* @return True if this plugin supports synthText method.
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*
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* If the plugin returns True, it must also implement the following methods:
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* - @ref synthText
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* - @ref getFilename
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* - @ref ackFinished
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*
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* If the plugin returns True, it need not implement @ref sayText .
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*/
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virtual bool supportsSynth();
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/**
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* Say or Synthesize text with the given voice code.
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* @param festivalExePath Path to the Festival executable, or just "festival".
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* @param text The text to be synthesized.
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* @param suggestedFilename If not Null, synthesize only to this filename, otherwise
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* synthesize and audibilize the text.
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* @param voiceCode Voice code.
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* @param time Speed percentage. 50 to 200. 200% = 2x normal.
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* @param pitch Pitch persentage. 50 to 200.
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* @param volume Volume percentage. 50 to 200.
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* @param languageCode Language code, for example, "en".
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*/
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void synth(const TQString &festivalExePath, const TQString &text,
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const TQString &synthFilename, const TQString& voiceCode,
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int time, int pitch, int volume, const TQString &languageCode,
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TQTextCodec* codec);
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/**
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* Sends commands to Festival to query for a list of supported voice codes.
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* Fires queryVoicesFinished when completed.
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* @return False if busy doing something else and therefore cannot
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* do the query.
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*/
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bool queryVoices(const TQString &festivalExePath);
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/**
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* Returns the name of an XSLT stylesheet that will convert a valid SSML file
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* into a format that can be processed by the synth. For example,
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* The Festival plugin returns a stylesheet that will convert SSML into
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* SABLE. Any tags the synth cannot handle should be stripped (leaving
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* their text contents though). The default stylesheet strips all
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* tags and converts the file to plain text.
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* @return Name of the XSLT file.
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*/
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TQString getSsmlXsltFilename();
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/**
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* Whether Festival supports SSML or not.
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* 0 = Unknown
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* 1 = Yes
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* 2 = No
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*/
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SupportsSSML supportsSSML() { return m_supportsSSML; }
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signals:
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/**
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* This signal fires upon completion of a queryVoices operation.
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* The list of voice codes do not have "voice_" prefix.
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*/
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void queryVoicesFinished(const TQStringList &voiceCodes);
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private slots:
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void slotProcessExited(TDEProcess* proc);
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void slotReceivedStdout(TDEProcess* proc, char* buffer, int buflen);
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void slotReceivedStderr(TDEProcess* proc, char* buffer, int buflen);
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void slotWroteStdin(TDEProcess* proc);
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private:
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/**
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* Start Festival engine.
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* @param festivalExePath Path to the Festival executable, or just "festival".
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* @param voiceCode Voice code in which to speak text.
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* @param languageCode Language code, for example, "en".
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*/
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void startEngine(const TQString &festivalExePath, const TQString &voiceCode,
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const TQString &languageCode, TQTextCodec* codec);
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/**
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* If ready for more output, sends the given text to Festival process, otherwise,
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* puts it in the queue.
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* @param text Text to send or queue.
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*/
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void sendToFestival(const TQString& text);
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/**
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* If Festival is ready for more input and there is more output to send, send it.
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* To be ready for more input, the Stdin buffer must be empty and the "festival>"
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* prompt must have been received (m_ready = true).
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* @return False when Festival is ready for more input
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* but there is nothing to be sent, or if Festival
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* has exited.
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*/
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bool sendIfReady();
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/**
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* Determine if the text has SABLE tags. If so, we will have to use a different
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* synthesis method.
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*/
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bool isSable(const TQString &text);
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/**
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* We attempt to shorten sentences longer than this by replacing commas with periods.
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*/
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static const int c_tooLong = 600;
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/**
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* Path to the Festival executable.
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*/
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TQString m_festivalExePath;
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/**
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* Selected voice (from config).
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*/
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TQString m_voiceCode;
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/**
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* True if the voice is preloaded. Also used as a flag to supress killing
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* Festival, since startup time will be excessive.
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*/
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bool m_preload;
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/**
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* Selected speed (from config).
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*/
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int m_time;
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/**
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* Selected pitch (frequency) (from config).
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*/
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int m_pitch;
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/**
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* Selected volume (from config).
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*/
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int m_volume;
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/**
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* Running voice.
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*/
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TQString m_runningVoiceCode;
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/**
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* Running time (speed).
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*/
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int m_runningTime;
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/**
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* Running pitch (frequency).
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*/
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int m_runningPitch;
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/**
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* Festival process
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*/
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TDEProcess* m_festProc;
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/**
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* Synthesis filename.
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*/
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TQString m_synthFilename;
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/**
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* True when festival is ready for another input.
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*/
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volatile bool m_ready;
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/**
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* Plugin state.
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*/
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pluginState m_state;
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/**
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* True when stopText has been called. Used to force transition to psIdle when
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* Festival exits.
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*/
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bool m_waitingStop;
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/**
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* True when queryVoices has been called.
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*/
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bool m_waitingQueryVoices;
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/**
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* A queue of outputs to be sent to the Festival process.
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* Since Festival requires us to wait until the "festival>" prompt before
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* sending the next command, this queue allows us to queue up multiple
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* commands and send each one when the ReceivedStdOut signal fires.
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*/
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TQStringList m_outputQueue;
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bool m_writingStdin;
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/**
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* Language code.
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*/
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TQString m_languageCode;
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/**
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* Codec.
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*/
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TQTextCodec* m_codec;
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/**
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* Flag if SSML is supported. Festival cannot support SABLE (and therefore SSML)
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* unless rab_diphone (British male) is installed. Gawd, I hope Festival folks fix this!
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*/
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SupportsSSML m_supportsSSML;
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};
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#endif // _FESTIVALINTPROC_H_
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