wavewidget.hh

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/*
 * SubTimer header file
 *  Copyright (C) 2005 Peter Salvi
 *   Last modification: <2005.03.23., 16:21:13>
 *
 *  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., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
 */

#ifndef WAVE_WIDGET_HH
#define WAVE_WIDGET_HH

#include <alsa/asoundlib.h>

#include <qdatetime.h>
#include <qwidget.h>

#define PAINT_FREQ 100

class WaveFile;
class PlayThread;
class QMutex;
class QTimer;

class WaveWidget : public QWidget
{
  Q_OBJECT

public:
  WaveWidget(QWidget* parent=0, const char *name=0);
  ~WaveWidget();

  bool loadFile(QString const fname);

  bool isVisible(QTime const t) const;

  QTime startTime() const; 

  QTime endTime() const;

  void setStartTime(QTime t);

  void setEndTime(QTime t);

public slots: 

  void playSelected();

  void stopPlayback();

  void setXZoom(int zoom);

  void setYZoom(int zoom);

  void scrollTo(int start);

signals:
  void startTimeChanged(QTime *start);

  void endTimeChanged(QTime *end);

  void lengthChanged(int length);

  void positionChanged(int pos);

protected:
  void customEvent(QCustomEvent *e);

  void mousePressEvent(QMouseEvent *e);

  void paintEvent(QPaintEvent *);

private:
  int timeToPos(QTime t);
  
  WaveFile *wave_file;
  PlayThread *pthread;
  snd_pcm_t *playback_handle;
  QTime left, right, start_time, end_time;
  int xzoom, yzoom;
  char *playdata;
  size_t playsize;
  bool playing;
  double play_position;
  QTime play_start, play_end;
  QMutex *paint_lock;
  QTimer *paint_timer;
};
  
#endif // WAVE_WIDGET_HH

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