src/qmpwidget.cpp

   1 /*
   2  *  qmpwidget - A Qt widget for embedding MPlayer
   3  *  Copyright (C) 2010 by Jonas Gehring
   4  *
   5  *  This program is free software: you can redistribute it and/or modify
   6  *  it under the terms of the GNU General Public License as published by
   7  *  the Free Software Foundation, either version 3 of the License, or
   8  *  (at your option) any later version.
   9  *
  10  *  This program is distributed in the hope that it will be useful,
  11  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
  12  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  13  *  GNU General Public License for more details.
  14  *
  15  *  You should have received a copy of the GNU General Public License
  16  *  along with this program.  If not, see <http://www.gnu.org/licenses/>.
  17  */
  18
  19
  20 //#define QMP_DEBUG_OUTPUT 1
  21
  22 #include <iostream>
  23 #include <QAbstractSlider>
  24 #include <QKeyEvent>
  25 #include <QLocalSocket>
  26 #include <QPainter>
  27 #include <QProcess>
  28 #include <QStringList>
  29 #include <QTemporaryFile>
  30 #include <QThread>
  31 #include <QtDebug>
  32
  33 #ifdef QT_OPENGL_LIB
  34  #include <QGLWidget>
  35 #endif
  36
  37 #include "qmpwidget.h"
  38
  39 #define QMP_DEBUG_OUTPUT
  40
  41 #ifdef QMP_USE_YUVPIPE
  42  #include "qmpyuvreader.h"
  43 #endif // QMP_USE_YUVPIPE
  44
  45
  46 // A plain video widget
  47 class QMPPlainVideoWidget : public QWidget
  48 {
  49         Q_OBJECT
  50
  51         public:
  52                 QMPPlainVideoWidget(QWidget *parent = 0)
  53                         : QWidget(parent)
  54                 {
  55                         setAttribute(Qt::WA_NoSystemBackground);
  56                         setMouseTracking(true);
  57                 }
  58
  59                 void showUserImage(const QImage &image)
  60                 {
  61                         m_userImage = image;
  62                         update();
  63                 }
  64
  65         public slots:
  66                 void displayImage(const QImage &image)
  67                 {
  68                         m_pixmap = QPixmap::fromImage(image);
  69                         update();
  70                 }
  71
  72         protected:
  73                 void paintEvent(QPaintEvent *event)
  74                 {
  75                         Q_UNUSED(event);
  76                         QPainter p(this);
  77                         p.setCompositionMode(QPainter::CompositionMode_Source);
  78
  79                         if (!m_userImage.isNull()) {
  80                                 p.fillRect(rect(), Qt::black);
  81                                 p.drawImage(rect().center() - m_userImage.rect().center(), m_userImage);
  82                         } else if (!m_pixmap.isNull()) {
  83                                 p.drawPixmap(rect(), m_pixmap);
  84                         } else {
  85                                 p.fillRect(rect(), Qt::black);
  86                         }
  87                         p.end();
  88                 }
  89
  90         private:
  91                 QPixmap m_pixmap;
  92                 QImage m_userImage;
  93 };
  94
  95
  96 #ifdef QT_OPENGL_LIB
  97
  98 // A OpenGL video widget
  99 class QMPOpenGLVideoWidget : public QGLWidget
 100 {
 101         Q_OBJECT
 102
 103         public:
 104                 QMPOpenGLVideoWidget(QWidget *parent = 0)
 105                         : QGLWidget(parent), m_tex(-1)
 106                 {
 107                         setMouseTracking(true);
 108                 }
 109
 110                 void showUserImage(const QImage &image)
 111                 {
 112                         m_userImage = image;
 113
 114                         makeCurrent();
 115                         if (m_tex >= 0) {
 116                                 deleteTexture(m_tex);
 117                         }
 118                         if (!m_userImage.isNull()) {
 119                                 m_tex = bindTexture(image);
 120                                 glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
 121                                 glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
 122                         } else {
 123                                 glViewport(0, 0, width(), qMax(height(), 1));
 124                         }
 125                         updateGL();
 126                 }
 127
 128         public slots:
 129                 void displayImage(const QImage &image)
 130                 {
 131                         if (!m_userImage.isNull())  {
 132                                 return;
 133                         }
 134
 135                         makeCurrent();
 136                         if (m_tex >= 0) {
 137                                 deleteTexture(m_tex);
 138                         }
 139                         m_tex = bindTexture(image);
 140                         glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
 141                         glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
 142                         updateGL();
 143                 }
 144
 145         protected:
 146                 void initializeGL()
 147                 {
 148                         glEnable(GL_TEXTURE_2D);
 149                         glClearColor(0, 0, 0, 0);
 150                         glClearDepth(1);
 151                 }
 152
 153                 void resizeGL(int w, int h)
 154                 {
 155                   glViewport(0, 0, w, qMax(h, 1));
 156                 }
 157
 158                 void paintGL()
 159                 {
 160                         glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
 161                         glLoadIdentity();
 162                         if (m_tex >= 0) {
 163                                 glBindTexture(GL_TEXTURE_2D, m_tex);
 164                                 if (!m_userImage.isNull()) {
 165                                         QRect r = m_userImage.rect();
 166                                         r.moveTopLeft(rect().center() - m_userImage.rect().center());
 167                                         glViewport(r.x(), r.y(), r.width(), r.height());
 168                                 }
 169                                 glBegin(GL_QUADS);
 170                                 glTexCoord2f(0, 0); glVertex2f(-1, -1);
 171                                 glTexCoord2f(1, 0); glVertex2f( 1, -1);
 172                                 glTexCoord2f(1, 1); glVertex2f( 1,  1);
 173                                 glTexCoord2f(0, 1); glVertex2f(-1,  1);
 174                                 glEnd();
 175                         }
 176                 }
 177
 178         private:
 179                 QImage m_userImage;
 180                 int m_tex;
 181 };
 182
 183 #endif // QT_OPENGL_LIB
 184
 185
 186 // A custom QProcess designed for the MPlayer slave interface
 187 class QMPProcess : public QProcess
 188 {
 189         Q_OBJECT
 190
 191         public:
 192                 QMPProcess(QObject *parent = 0)
 193                         : QProcess(parent), m_state(QMPwidget::NotStartedState), m_mplayerPath("mplayer"),
 194                           m_fakeInputconf(NULL)
 195 #ifdef QMP_USE_YUVPIPE
 196                           , m_yuvReader(NULL)
 197 #endif
 198                 {
 199                         resetValues();
 200
 201 #ifdef Q_WS_WIN
 202                         m_mode = QMPwidget::EmbeddedMode;
 203                         m_videoOutput = "directx,directx:noaccel";
 204 #elif defined(Q_WS_X11)
 205                         m_mode = QMPwidget::EmbeddedMode;
 206  #ifdef QT_OPENGL_LIB
 207                         m_videoOutput = "gl2,gl,xv";
 208  #else
 209                         m_videoOutput = "xv";
 210  #endif
 211 #elif defined(Q_WS_MAC)
 212                         m_mode = QMPwidget::PipeMode;
 213  #ifdef QT_OPENGL_LIB
 214                         m_videoOutput = "gl,quartz";
 215  #else
 216                         m_videoOutput = "quartz";
 217  #endif
 218 #endif
 219
 220                         m_movieFinishedTimer.setSingleShot(true);
 221                         m_movieFinishedTimer.setInterval(100);
 222
 223                         connect(this, SIGNAL(readyReadStandardOutput()), this, SLOT(readStdout()));
 224                         connect(this, SIGNAL(readyReadStandardError()), this, SLOT(readStderr()));
 225                         connect(this, SIGNAL(finished(int, QProcess::ExitStatus)), this, SLOT(finished()));
 226                         connect(&m_movieFinishedTimer, SIGNAL(timeout()), this, SLOT(movieFinished()));
 227                 }
 228
 229                 ~QMPProcess()
 230                 {
 231 #ifdef QMP_USE_YUVPIPE
 232                         if (m_yuvReader != NULL) {
 233                                 m_yuvReader->stop();
 234                         }
 235 #endif
 236                         if (m_fakeInputconf != NULL) {
 237                                 delete m_fakeInputconf;
 238                         }
 239                 }
 240
 241                 // Starts the MPlayer process in idle mode
 242                 void start(QWidget *widget, const QStringList &args)
 243                 {
 244                         if (m_mode == QMPwidget::PipeMode) {
 245 #ifdef QMP_USE_YUVPIPE
 246                                 m_yuvReader = new QMPYuvReader(this);
 247 #else
 248                                 m_mode = QMPwidget::EmbeddedMode;
 249 #endif
 250                         }
 251
 252                         // Figure out the mplayer version in order to check if
 253                         // "-input nodefault-bindings" is available
 254                         bool useFakeInputconf = true;
 255                         QString version = mplayerVersion();
 256                         if (version.contains("SVN")) { // Check revision
 257                                 QRegExp re("SVN-r([0-9]*)");
 258                                 if (re.indexIn(version) > -1) {
 259                                         int revision = re.cap(1).toInt();
 260                                         if (revision >= 28878) {
 261                                                 useFakeInputconf = false;
 262                                         }
 263                                 }
 264                         }
 265
 266                         QStringList myargs;
 267                         myargs += "-slave";
 268                         myargs += "-idle";
 269                         myargs += "-noquiet";
 270                         myargs += "-identify";
 271                         myargs += "-nomouseinput";
 272                         myargs += "-nokeepaspect";
 273                         myargs += "-monitorpixelaspect";
 274                         myargs += "1";
 275                         myargs += "-osdlevel";
 276                         myargs += "1";
 277                         if (!useFakeInputconf) {
 278                                 myargs += "-input";
 279                                 myargs += "nodefault-bindings:conf=/dev/null";
 280                         } else {
 281 #ifndef Q_WS_WIN
 282                                 // Ugly hack for older versions of mplayer (used in kmplayer and other)
 283                                 if (m_fakeInputconf == NULL) {
 284                                         m_fakeInputconf = new QTemporaryFile();
 285                                         if (m_fakeInputconf->open()) {
 286                                                 writeFakeInputconf(m_fakeInputconf);
 287                                         } else {
 288                                                 delete m_fakeInputconf;
 289                                                 m_fakeInputconf = NULL;
 290                                         }
 291                                 }
 292                                 if (m_fakeInputconf != NULL) {
 293                                         myargs += "-input";
 294                                         myargs += QString("conf=%1").arg(m_fakeInputconf->fileName());
 295                                 }
 296 #endif
 297                         }
 298
 299                         if (m_mode == QMPwidget::EmbeddedMode) {
 300                                 myargs += "-wid";
 301                                 myargs += QString::number((int)widget->winId());
 302                                 if (!m_videoOutput.isEmpty()) {
 303                                         myargs += "-vo";
 304                                         myargs += m_videoOutput;
 305                                 }
 306                         } else {
 307 #ifdef QMP_USE_YUVPIPE
 308                                 myargs += "-vo";
 309                                 myargs += QString("yuv4mpeg:file=%1").arg(m_yuvReader->m_pipe);
 310 #endif
 311                         }
 312
 313                         myargs += args;
 314 #ifdef QMP_DEBUG_OUTPUT
 315                         qDebug() << myargs;
 316 #endif
 317                         QProcess::start(m_mplayerPath, myargs);
 318                         changeState(QMPwidget::IdleState);
 319
 320                         if (m_mode == QMPwidget::PipeMode) {
 321 #ifdef QMP_USE_YUVPIPE
 322                                 connect(m_yuvReader, SIGNAL(imageReady(const QImage &)), widget, SLOT(displayImage(const QImage &)));
 323                                 m_yuvReader->start();
 324 #endif
 325                         }
 326                 }
 327
 328                 QString mplayerVersion()
 329                 {
 330                         QProcess p;
 331                         p.start(m_mplayerPath, QStringList("-version"));
 332                         if (!p.waitForStarted()) {
 333                                 return QString();
 334                         }
 335                         if (!p.waitForFinished()) {
 336                                 return QString();
 337                         }
 338
 339                         QString output = QString(p.readAll());
 340                         QRegExp re("MPlayer ([^ ]*)");
 341                         if (re.indexIn(output) > -1) {
 342                                 return re.cap(1);
 343                         }
 344                         return output;
 345                 }
 346
 347                 QProcess::ProcessState processState() const
 348                 {
 349                         return QProcess::state();
 350                 }
 351
 352                 void writeCommand(const QString &command)
 353                 {
 354 #ifdef QMP_DEBUG_OUTPUT
 355                         qDebug("in: \"%s\"", qPrintable(command));
 356 #endif
 357                         QProcess::write(command.toLocal8Bit()+"\n");
 358                 }
 359
 360                 void quit()
 361                 {
 362                         writeCommand("quit");
 363                         QProcess::waitForFinished(100);
 364                         if (QProcess::state() == QProcess::Running) {
 365                                 QProcess::kill();
 366                         }
 367                         QProcess::waitForFinished(-1);
 368                 }
 369
 370                 void pause()
 371                 {
 372                         writeCommand("pause");
 373                 }
 374
 375                 void stop()
 376                 {
 377                         changeState(QMPwidget::StoppedState);
 378                         writeCommand("stop");
 379                 }
 380
 381         signals:
 382                 void stateChanged(int state);
 383                 void streamPositionChanged(double position);
 384                 void error(const QString &reason);
 385
 386                 void readStandardOutput(const QString &line);
 387                 void readStandardError(const QString &line);
 388
 389         private slots:
 390                 void readStdout()
 391                 {
 392                         QStringList lines = QString::fromLocal8Bit(readAllStandardOutput()).split("\n", QString::SkipEmptyParts);
 393                         for (int i = 0; i < lines.count(); i++) {
 394                                 lines[i].remove("\r");
 395 #ifdef QMP_DEBUG_OUTPUT
 396                                 qDebug("out: \"%s\"", qPrintable(lines[i]));
 397 #endif
 398                                 parseLine(lines[i]);
 399                                 emit readStandardOutput(lines[i]);
 400                         }
 401                 }
 402
 403                 void readStderr()
 404                 {
 405                         QStringList lines = QString::fromLocal8Bit(readAllStandardError()).split("\n", QString::SkipEmptyParts);
 406                         for (int i = 0; i < lines.count(); i++) {
 407                                 lines[i].remove("\r");
 408 #ifdef QMP_DEBUG_OUTPUT
 409                                 qDebug("err: \"%s\"", qPrintable(lines[i]));
 410 #endif
 411                                 parseLine(lines[i]);
 412                                 emit readStandardError(lines[i]);
 413                         }
 414                 }
 415
 416                 void finished()
 417                 {
 418                         // Called if the *process* has finished
 419                         changeState(QMPwidget::NotStartedState);
 420                 }
 421
 422                 void movieFinished()
 423                 {
 424                         if (m_state == QMPwidget::PlayingState) {
 425                                 changeState(QMPwidget::IdleState);
 426                         }
 427                 }
 428
 429         private:
 430                 // Parses a line of MPlayer output
 431                 void parseLine(const QString &line)
 432                 {
 433                         if (line.startsWith("Playing ")) {
 434                                 changeState(QMPwidget::LoadingState);
 435                         } else if (line.startsWith("Cache fill:")) {
 436                                 changeState(QMPwidget::BufferingState);
 437                         } else if (line.startsWith("Starting playback...")) {
 438                                 m_mediaInfo.ok = true; // No more info here
 439                                 changeState(QMPwidget::PlayingState);
 440                         } else if (line.startsWith("File not found: ")) {
 441                                 changeState(QMPwidget::ErrorState);
 442                         } else if (line.endsWith("ID_PAUSED")) {
 443                                 changeState(QMPwidget::PausedState);
 444                         } else if (line.startsWith("ID_")) {
 445                                 parseMediaInfo(line);
 446                         } else if (line.startsWith("No stream found")) {
 447                                 changeState(QMPwidget::ErrorState, line);
 448                         } else if (line.startsWith("A:") || line.startsWith("V:")) {
 449                                 if (m_state != QMPwidget::PlayingState
 450                                     && m_state != QMPwidget::StoppedState) {
 451                                         changeState(QMPwidget::PlayingState);
 452                                 }
 453                                 parsePosition(line);
 454                         } else if (line.startsWith("Exiting...")) {
 455                                 changeState(QMPwidget::NotStartedState);
 456                         }
 457                 }
 458
 459                 // Parses MPlayer's media identification output
 460                 void parseMediaInfo(const QString &line)
 461                 {
 462                         QStringList info = line.split("=");
 463                         if (info.count() < 2) {
 464                                 return;
 465                         }
 466
 467                         if (info[0] == "ID_VIDEO_FORMAT") {
 468                                 m_mediaInfo.videoFormat = info[1];
 469                         } else if (info[0] == "ID_VIDEO_BITRATE") {
 470                                 m_mediaInfo.videoBitrate = info[1].toInt();
 471                         } else if (info[0] == "ID_VIDEO_WIDTH") {
 472                                 m_mediaInfo.size.setWidth(info[1].toInt());
 473                         } else if (info[0] == "ID_VIDEO_HEIGHT") {
 474                                 m_mediaInfo.size.setHeight(info[1].toInt());
 475                         } else if (info[0] == "ID_VIDEO_FPS") {
 476                                 m_mediaInfo.framesPerSecond = info[1].toDouble();
 477
 478                         } else if (info[0] == "ID_AUDIO_FORMAT") {
 479                                 m_mediaInfo.audioFormat = info[1];
 480                         } else if (info[0] == "ID_AUDIO_BITRATE") {
 481                                 m_mediaInfo.audioBitrate = info[1].toInt();
 482                         } else if (info[0] == "ID_AUDIO_RATE") {
 483                                 m_mediaInfo.sampleRate = info[1].toInt();
 484                         } else if (info[0] == "ID_AUDIO_NCH") {
 485                                 m_mediaInfo.numChannels = info[1].toInt();
 486
 487                         } else if (info[0] == "ID_LENGTH") {
 488                                 m_mediaInfo.length = info[1].toDouble();
 489                         } else if (info[0] == "ID_SEEKABLE") {
 490                                 m_mediaInfo.seekable = (bool)info[1].toInt();
 491
 492                         } else if (info[0].startsWith("ID_CLIP_INFO_NAME")) {
 493                                 m_currentTag = info[1];
 494                         } else if (info[0].startsWith("ID_CLIP_INFO_VALUE") && !m_currentTag.isEmpty()) {
 495                                 m_mediaInfo.tags.insert(m_currentTag, info[1]);
 496                         }
 497                 }
 498
 499                 // Parsas MPlayer's position output
 500                 void parsePosition(const QString &line)
 501                 {
 502                         static QRegExp rx("[ :]");
 503                         QStringList info = line.split(rx, QString::SkipEmptyParts);
 504
 505                         double oldpos = m_streamPosition;
 506                         for (int i = 0; i < info.count(); i++) {
 507                                 if (info[i] == "V" && info.count() > i) {
 508                                         m_streamPosition = info[i+1].toDouble();
 509
 510                                         // If the movie is near its end, start a timer that will check whether
 511                                         // the movie has really finished.
 512                                         if (qAbs(m_streamPosition - m_mediaInfo.length) < 1) {
 513                                                 m_movieFinishedTimer.start();
 514                                         }
 515                                 }
 516                         }
 517
 518                         if (oldpos != m_streamPosition) {
 519                                 emit streamPositionChanged(m_streamPosition);
 520                         }
 521                 }
 522
 523                 // Changes the current state, possibly emitting multiple signals
 524                 void changeState(QMPwidget::State state, const QString &comment = QString())
 525                 {
 526 #ifdef QMP_USE_YUVPIPE
 527                         if (m_yuvReader != NULL && (state == QMPwidget::ErrorState || state == QMPwidget::NotStartedState)) {
 528                                 m_yuvReader->stop();
 529                                 m_yuvReader->deleteLater();
 530                         }
 531 #endif
 532
 533                         if (m_state == state) {
 534                                 return;
 535                         }
 536
 537                         if (m_state == QMPwidget::PlayingState) {
 538                                 m_movieFinishedTimer.stop();
 539                         }
 540
 541                         m_state = state;
 542                         emit stateChanged(m_state);
 543
 544                         switch (m_state) {
 545                                 case QMPwidget::NotStartedState:
 546                                         resetValues();
 547                                         break;
 548
 549                                 case QMPwidget::ErrorState:
 550                                         emit error(comment);
 551                                         resetValues();
 552                                         break;
 553
 554                                 default: break;
 555                         }
 556                 }
 557
 558                 // Resets the media info and position values
 559                 void resetValues()
 560                 {
 561                         m_mediaInfo = QMPwidget::MediaInfo();
 562                         m_streamPosition = -1;
 563                 }
 564
 565                 // Writes a dummy input configuration to the given device
 566                 void writeFakeInputconf(QIODevice *device)
 567                 {
 568                         // Query list of supported keys
 569                         QProcess p;
 570                         p.start(m_mplayerPath, QStringList("-input") += "keylist");
 571                         if (!p.waitForStarted()) {
 572                                 return;
 573                         }
 574                         if (!p.waitForFinished()) {
 575                                 return;
 576                         }
 577                         QStringList keys = QString(p.readAll()).split("\n", QString::SkipEmptyParts);
 578
 579                         // Write dummy command for each key
 580                         QTextStream out(device);
 581                         for (int i = 0; i < keys.count(); i++) {
 582                                 keys[i].remove("\r");
 583                                 out << keys[i] << " " << "ignored" << endl;
 584                         }
 585                 }
 586
 587         public:
 588                 QMPwidget::State m_state;
 589
 590                 QString m_mplayerPath;
 591                 QString m_videoOutput;
 592                 QString m_pipe;
 593                 QMPwidget::Mode m_mode;
 594
 595                 QMPwidget::MediaInfo m_mediaInfo;
 596                 double m_streamPosition; // This is the video position
 597                 QTimer m_movieFinishedTimer;
 598
 599                 QString m_currentTag;
 600
 601                 QTemporaryFile *m_fakeInputconf;
 602
 603 #ifdef QMP_USE_YUVPIPE
 604                 QPointer<QMPYuvReader> m_yuvReader;
 605 #endif
 606 };
 607
 608
 609 // Initialize the media info structure
 610 QMPwidget::MediaInfo::MediaInfo()
 611         : videoBitrate(0), framesPerSecond(0), sampleRate(0), numChannels(0),
 612           ok(false), length(0), seekable(false)
 613 {
 614
 615 }
 616
 617
 618 /*!
 619  * \brief Constructor
 620  *
 621  * \param parent Parent widget
 622  */
 623 QMPwidget::QMPwidget(QWidget *parent)
 624         : QWidget(parent)
 625 {
 626         setFocusPolicy(Qt::StrongFocus);
 627         setSizePolicy(QSizePolicy::Expanding, QSizePolicy::Expanding);
 628
 629 #ifdef QT_OPENGL_LIB
 630         m_widget = new QMPOpenGLVideoWidget(this);
 631 #else
 632         m_widget = new QMPPlainVideoWidget(this);
 633 #endif
 634
 635         QPalette p = palette();
 636         p.setColor(QPalette::Window, Qt::black);
 637         setPalette(p);
 638
 639         m_seekTimer.setInterval(50);
 640         m_seekTimer.setSingleShot(true);
 641         connect(&m_seekTimer, SIGNAL(timeout()), this, SLOT(delayedSeek()));
 642
 643         m_process = new QMPProcess(this);
 644         connect(m_process, SIGNAL(stateChanged(int)), this, SLOT(mpStateChanged(int)));
 645         connect(m_process, SIGNAL(streamPositionChanged(double)), this, SLOT(mpStreamPositionChanged(double)));
 646         connect(m_process, SIGNAL(error(const QString &)), this, SIGNAL(error(const QString &)));
 647         connect(m_process, SIGNAL(readStandardOutput(const QString &)), this, SIGNAL(readStandardOutput(const QString &)));
 648         connect(m_process, SIGNAL(readStandardError(const QString &)), this, SIGNAL(readStandardError(const QString &)));
 649 }
 650
 651 /*!
 652  * \brief Destructor
 653  * \details
 654  * This function will ask the MPlayer process to quit and block until it has really
 655  * finished.
 656  */
 657 QMPwidget::~QMPwidget()
 658 {
 659         if (m_process->processState() == QProcess::Running) {
 660                 m_process->quit();
 661         }
 662         delete m_process;
 663 }
 664
 665 /*!
 666  * \brief Returns the current MPlayer process state
 667  *
 668  * \returns The process state
 669  */
 670 QMPwidget::State QMPwidget::state() const
 671 {
 672         return m_process->m_state;
 673 }
 674
 675 /*!
 676  * \brief Returns the current media info object
 677  * \details
 678  * Please check QMPwidget::MediaInfo::ok to make sure the media
 679  * information has been fully parsed.
 680  *
 681  * \returns The media info object
 682  */
 683 QMPwidget::MediaInfo QMPwidget::mediaInfo() const
 684 {
 685         return m_process->m_mediaInfo;
 686 }
 687
 688 /*!
 689  * \brief Returns the current playback position
 690  *
 691  * \returns The current playback position in seconds
 692  * \sa seek()
 693  */
 694 double QMPwidget::tell() const
 695 {
 696         return m_process->m_streamPosition;
 697 }
 698
 699 /*!
 700  * \brief Returns the MPlayer process
 701  *
 702  * \returns The MPlayer process
 703  */
 704 QProcess *QMPwidget::process() const
 705 {
 706         return m_process;
 707 }
 708
 709 /*!
 710  * \brief Sets the video playback mode
 711  * \details
 712  * Please see \ref playbackmodes for a discussion of the available modes.
 713  *
 714  * \param mode The video playback mode
 715  * \sa mode()
 716  */
 717 void QMPwidget::setMode(Mode mode)
 718 {
 719 #ifdef QMP_USE_YUVPIPE
 720         m_process->m_mode = mode;
 721 #else
 722         Q_UNUSED(mode)
 723 #endif
 724 }
 725
 726 /*!
 727  * \brief Returns the current video playback mode
 728  *
 729  * \returns The current video playback mode
 730  * \sa setMode()
 731  */
 732 QMPwidget::Mode QMPwidget::mode() const
 733 {
 734         return m_process->m_mode;
 735 }
 736
 737 /*!
 738  * \brief Sets the video output mode
 739  * \details
 740  * The video output mode string will be passed to MPlayer using its \p -vo option.
 741  * Please see http://www.mplayerhq.hu/DOCS/HTML/en/video.html for an overview of
 742  * available video output modes.
 743  *
 744  * Per default, this string will have the following values:
 745  * <table>
 746  *  <tr><th>System</th><th>Configuration</th><th>Value</th></tr>
 747  *  <tr>
 748  *   <td>Windows</td>
 749  *   <td></td>
 750  *   <td>\p "directx,directx:noaccel"</td>
 751  *  </tr>
 752  *  <tr>
 753  *   <td>X11</td>
 754  *   <td>Compiled without OpenGL support</td>
 755  *   <td>\p "xv"</td>
 756  *  </tr>
 757  *  <tr>
 758  *   <td>X11</td>
 759  *   <td>Compiled with OpenGL support</td>
 760  *   <td>\p "gl2,gl,xv"</td>
 761  *  </tr>
 762  *  <tr>
 763  *   <td>Mac OS X</td>
 764  *   <td>Compiled without OpenGL support</td>
 765  *   <td>\p "quartz"</td>
 766  *  </tr>
 767  *  <tr>
 768  *   <td>Mac OS X</td>
 769  *   <td>Compiled with OpenGL support</td>
 770  *   <td>\p "gl,quartz"</td>
 771  *  </tr>
 772  * </table>
 773  *
 774  *
 775  * \param output The video output mode string
 776  * \sa videoOutput()
 777  */
 778 void QMPwidget::setVideoOutput(const QString &output)
 779 {
 780         m_process->m_videoOutput = output;
 781 }
 782
 783 /*!
 784  * \brief Returns the current video output mode
 785  *
 786  * \returns The current video output mode
 787  * \sa setVideoOutput()
 788  */
 789 QString QMPwidget::videoOutput() const
 790 {
 791         return m_process->m_videoOutput;
 792 }
 793
 794 /*!
 795  * \brief Sets the path to the MPlayer executable
 796  * \details
 797  * Per default, it is assumed the MPlayer executable is
 798  * available in the current OS path. Therefore, this value is
 799  * set to "mplayer".
 800  *
 801  * \param path Path to the MPlayer executable
 802  * \sa mplayerPath()
 803  */
 804 void QMPwidget::setMPlayerPath(const QString &path)
 805 {
 806         m_process->m_mplayerPath = path;
 807 }
 808
 809 /*!
 810  * \brief Returns the current path to the MPlayer executable
 811  *
 812  * \returns The path to the MPlayer executable
 813  * \sa setMPlayerPath()
 814  */
 815 QString QMPwidget::mplayerPath() const
 816 {
 817         return m_process->m_mplayerPath;
 818 }
 819
 820 /*!
 821  * \brief Returns the version string of the MPlayer executable
 822  * \details
 823  * If the mplayer
 824  *
 825  *
 826  * \returns The version string of the MPlayer executable
 827  */
 828 QString QMPwidget::mplayerVersion()
 829 {
 830         return m_process->mplayerVersion();
 831 }
 832
 833 /*!
 834  * \brief Sets a seeking slider for this widget
 835  */
 836 void QMPwidget::setSeekSlider(QAbstractSlider *slider)
 837 {
 838         if (m_seekSlider) {
 839                 m_seekSlider->disconnect(this);
 840                 disconnect(m_seekSlider);
 841         }
 842
 843         if (m_process->m_mediaInfo.ok) {
 844                 slider->setRange(0, m_process->m_mediaInfo.length);
 845         }
 846         if (m_process->m_mediaInfo.ok) {
 847                 slider->setEnabled(m_process->m_mediaInfo.seekable);
 848         }
 849
 850         connect(slider, SIGNAL(valueChanged(int)), this, SLOT(seek(int)));
 851         m_seekSlider = slider;
 852 }
 853
 854 /*!
 855  * \brief Sets a volume slider for this widget
 856  */
 857 void QMPwidget::setVolumeSlider(QAbstractSlider *slider)
 858 {
 859         if (m_volumeSlider) {
 860                 m_volumeSlider->disconnect(this);
 861                 disconnect(m_volumeSlider);
 862         }
 863
 864
 865         slider->setRange(0, 100);
 866         slider->setValue(100); // TODO
 867
 868         connect(slider, SIGNAL(valueChanged(int)), this, SLOT(setVolume(int)));
 869         m_volumeSlider = slider;
 870 }
 871
 872 /*!
 873  * \brief Shows a custom image
 874  * \details
 875  * This function sets a custom image that will be shown instead of the MPlayer
 876  * video output. In order to show MPlayer's output again, call this function
 877  * with a null image.
 878  *
 879  * \note If the current playback mode is not set to \p PipeMode, this function
 880  * will have no effect if MPlayer draws to the widget.
 881  *
 882  * \param image Custom image
 883  */
 884 void QMPwidget::showImage(const QImage &image)
 885 {
 886 #ifdef QT_OPENGL_LIB
 887         qobject_cast<QMPOpenGLVideoWidget *>(m_widget)->showUserImage(image);
 888 #else
 889         qobject_cast<QMPPlainVideoWidget*>(m_widget)->showUserImage(image);
 890 #endif
 891 }
 892
 893 /*!
 894  * \brief Returns a suitable size hint for this widget
 895  * \details
 896  * This function is used internally by Qt.
 897  */
 898 QSize QMPwidget::sizeHint() const
 899 {
 900         if (m_process->m_mediaInfo.ok && !m_process->m_mediaInfo.size.isNull()) {
 901                 return m_process->m_mediaInfo.size;
 902         }
 903         return QWidget::sizeHint();
 904 }
 905
 906 /*!
 907  * \brief Starts the MPlayer process with the given arguments
 908  * \details
 909  * If there's another process running, it will be terminated first. MPlayer
 910  * will be run in idle mode and is avaiting your commands, e.g. via load().
 911  *
 912  * \param args MPlayer command line arguments
 913  */
 914 void QMPwidget::start(const QStringList &args)
 915 {
 916         if (m_process->processState() == QProcess::Running) {
 917                 m_process->quit();
 918         }
 919         m_process->start(m_widget, args);
 920 }
 921
 922 /*!
 923  * \brief Loads a file or url and starts playback
 924  *
 925  * \param url File patho or url
 926  */
 927 void QMPwidget::load(const QString &url)
 928 {
 929         Q_ASSERT_X(m_process->state() != QProcess::NotRunning, "QMPwidget::load()", "MPlayer process not started yet");
 930
 931         // From the MPlayer slave interface documentation:
 932         // "Try using something like [the following] to switch to the next file.
 933         // It avoids audio playback starting to play the old file for a short time
 934         // before switching to the new one.
 935         writeCommand("pausing_keep_force pt_step 1");
 936         writeCommand("get_property pause");
 937
 938         if (url.endsWith(".txt", Qt::CaseInsensitive))
 939           writeCommand(QString("loadlist '%1'").arg(url));
 940         else
 941           writeCommand(QString("loadfile '%1'").arg(url));
 942 }
 943
 944 /*!
 945  * \brief Resumes playback
 946  */
 947 void QMPwidget::play()
 948 {
 949         if (m_process->m_state == PausedState) {
 950                 m_process->pause();
 951         }
 952 }
 953
 954 /*!
 955  * \brief Pauses playback
 956  */
 957 void QMPwidget::pause()
 958 {
 959         if (m_process->m_state == PlayingState) {
 960                 m_process->pause();
 961         }
 962 }
 963
 964 /*!
 965  * \brief Stops playback
 966  */
 967 void QMPwidget::stop()
 968 {
 969         m_process->stop();
 970 }
 971
 972 /*!
 973  * \brief Media playback seeking
 974  *
 975  * \param offset Seeking offset in seconds
 976  * \param whence Seeking mode
 977  * \returns \p true If the seeking mode is valid
 978  * \sa tell()
 979  */
 980 bool QMPwidget::seek(int offset, int whence)
 981 {
 982         return seek(double(offset), whence);
 983 }
 984
 985 /*!
 986  * \brief Media playback seeking
 987  *
 988  * \param offset Seeking offset in seconds
 989  * \param whence Seeking mode
 990  * \returns \p true If the seeking mode is valid
 991  * \sa tell()
 992  */
 993 bool QMPwidget::seek(double offset, int whence)
 994 {
 995         m_seekTimer.stop(); // Cancel all current seek requests
 996
 997         switch (whence) {
 998                 case RelativeSeek:
 999                 case PercentageSeek:
1000                 case AbsoluteSeek:
1001                         break;
1002                 default:
1003                         return false;
1004         }
1005
1006         // Schedule seek request
1007         m_seekCommand = QString("seek %1 %2").arg(offset).arg(whence);
1008         m_seekTimer.start();
1009         return true;
1010 }
1011
1012 /*!
1013  * \brief Toggles full-screen mode
1014  */
1015 void QMPwidget::toggleFullScreen()
1016 {
1017         if (!isFullScreen()) {
1018                 m_windowFlags = windowFlags() & (Qt::Window);
1019                 m_geometry = geometry();
1020                 setWindowFlags((windowFlags() | Qt::Window));
1021                 // From Phonon::VideoWidget
1022 #ifdef Q_WS_X11
1023                 show();
1024                 raise();
1025                 setWindowState(windowState() | Qt::WindowFullScreen);
1026 #else
1027                 setWindowState(windowState() | Qt::WindowFullScreen);
1028                 show();
1029 #endif
1030         } else {
1031                 setWindowFlags((windowFlags() ^ (Qt::Window)) | m_windowFlags);
1032                 setWindowState(windowState() & ~Qt::WindowFullScreen);
1033                 setGeometry(m_geometry);
1034                 show();
1035         }
1036 }
1037
1038 /*!
1039  * \brief Sends a command to the MPlayer process
1040  * \details
1041  * Since MPlayer is being run in slave mode, it reads commands from the standard
1042  * input. It is assumed that the interface provided by this class might not be
1043  * sufficient for some situations, so you can use this functions to directly
1044  * control the MPlayer process.
1045  *
1046  * For a complete list of commands for MPlayer's slave mode, see
1047  * http://www.mplayerhq.hu/DOCS/tech/slave.txt .
1048  *
1049  * \param command The command line. A newline character will be added internally.
1050  */
1051 void QMPwidget::writeCommand(const QString &command)
1052 {
1053         m_process->writeCommand(command);
1054 }
1055
1056 /*!
1057  * \brief Mouse double click event handler
1058  * \details
1059  * This implementation will toggle full screen and accept the event
1060  *
1061  * \param event Mouse event
1062  */
1063 void QMPwidget::mouseDoubleClickEvent(QMouseEvent *event)
1064 {
1065         toggleFullScreen();
1066         event->accept();
1067 }
1068
1069 /*!
1070  * \brief Keyboard press event handler
1071  * \details
1072  * This implementation tries to resemble the classic MPlayer interface. For a
1073  * full list of supported key codes, see \ref shortcuts.
1074  *
1075  * \param event Key event
1076  */
1077 void QMPwidget::keyPressEvent(QKeyEvent *event)
1078 {
1079         bool accept = true;
1080         switch (event->key()) {
1081                 case Qt::Key_P:
1082                 case Qt::Key_Space:
1083                         if (state() == PlayingState) {
1084                                 pause();
1085                         } else if (state() == PausedState) {
1086                                 play();
1087                         }
1088                         break;
1089
1090                 case Qt::Key_F:
1091                         toggleFullScreen();
1092                         break;
1093
1094                 case Qt::Key_Q:
1095                 case Qt::Key_Escape:
1096                         stop();
1097                         break;
1098
1099                 case Qt::Key_Minus:
1100                         writeCommand("audio_delay -0.1");
1101                         break;
1102                 case Qt::Key_Plus:
1103                         writeCommand("audio_delay 0.1");
1104                         break;
1105
1106                 case Qt::Key_Left:
1107                         seek(-10, RelativeSeek);
1108                         break;
1109                 case Qt::Key_Right:
1110                         seek(10, RelativeSeek);
1111                         break;
1112                 case Qt::Key_Down:
1113                         seek(-60, RelativeSeek);
1114                         break;
1115                 case Qt::Key_Up:
1116                         seek(60, RelativeSeek);
1117                         break;
1118                 case Qt::Key_PageDown:
1119                         seek(-600, RelativeSeek);
1120                         break;
1121                 case Qt::Key_PageUp:
1122                         seek(600, RelativeSeek);
1123                         break;
1124
1125                 case Qt::Key_Asterisk:
1126                         writeCommand("volume 10");
1127                         break;
1128                 case Qt::Key_Slash:
1129                         writeCommand("volume -10");
1130                         break;
1131
1132                 case Qt::Key_X:
1133                         writeCommand("sub_delay 0.1");
1134                         break;
1135                 case Qt::Key_Z:
1136                         writeCommand("sub_delay -0.1");
1137                         break;
1138
1139                 default:
1140                         accept = false;
1141                         break;
1142         }
1143
1144         event->setAccepted(accept);
1145 }
1146
1147 /*!
1148  * \brief Resize event handler
1149  * \details
1150  * If you reimplement this function, you need to call this handler, too.
1151  *
1152  * \param event Resize event
1153  */
1154 void QMPwidget::resizeEvent(QResizeEvent *event)
1155 {
1156         Q_UNUSED(event);
1157         updateWidgetSize();
1158 }
1159
1160 void QMPwidget::updateWidgetSize()
1161 {
1162         if (!m_process->m_mediaInfo.size.isNull()) {
1163                 QSize mediaSize = m_process->m_mediaInfo.size;
1164                 QSize widgetSize = size();
1165
1166                 double factor = qMin(double(widgetSize.width()) / mediaSize.width(), double(widgetSize.height()) / mediaSize.height());
1167                 QRect wrect(0, 0, int(factor * mediaSize.width() + 0.5), int(factor * mediaSize.height()));
1168                 wrect.moveTopLeft(rect().center() - wrect.center());
1169                 m_widget->setGeometry(wrect);
1170         } else {
1171                 m_widget->setGeometry(QRect(QPoint(0, 0), size()));
1172         }
1173
1174 }
1175
1176 void QMPwidget::delayedSeek()
1177 {
1178         if (!m_seekCommand.isEmpty()) {
1179                 writeCommand(m_seekCommand);
1180                 m_seekCommand = QString();
1181         }
1182 }
1183
1184 void QMPwidget::setVolume(int volume)
1185 {
1186         writeCommand(QString("volume %1 1").arg(volume));
1187 }
1188
1189 void QMPwidget::mpStateChanged(int state)
1190 {
1191         if (m_seekSlider != NULL && state == PlayingState && m_process->m_mediaInfo.ok) {
1192                 m_seekSlider->setRange(0, m_process->m_mediaInfo.length);
1193                 m_seekSlider->setEnabled(m_process->m_mediaInfo.seekable);
1194         }
1195
1196         updateWidgetSize();
1197         emit stateChanged(state);
1198 }
1199
1200 void QMPwidget::mpStreamPositionChanged(double position)
1201 {
1202         if (m_seekSlider != NULL && m_seekCommand.isEmpty() && m_seekSlider->value() != qRound(position)) {
1203                 m_seekSlider->disconnect(this);
1204                 m_seekSlider->setValue(qRound(position));
1205                 connect(m_seekSlider, SIGNAL(valueChanged(int)), this, SLOT(seek(int)));
1206         }
1207 }
1208
1209 void QMPwidget::mpVolumeChanged(int volume)
1210 {
1211         if (m_volumeSlider != NULL) {
1212                 m_volumeSlider->disconnect(this);
1213                 m_volumeSlider->setValue(volume);
1214                 connect(m_seekSlider, SIGNAL(valueChanged(int)), this, SLOT(setVolume(int)));
1215         }
1216 }
1217
1218
1219 #include "qmpwidget.moc"
1220
1221
1222 /* Documentation follows */
1223
1224 /*!
1225  * \class QMPwidget
1226  * \brief A Qt widget for embedding MPlayer
1227  * \details
1228  *
1229  * \section Overview
1230  *
1231  * \subsection comm MPlayer communication
1232  *
1233  * If you want to communicate with MPlayer through its
1234  * <a href="http://www.mplayerhq.hu/DOCS/tech/slave.txt">slave mode protocol</a>,
1235  * you can use the writeCommand() slot. If MPlayer writes to its standard output
1236  * or standard error channel, the signals readStandardOutput() and
1237  * readStandardError() will be emitted.
1238  *
1239  * \subsection controls Graphical controls
1240  *
1241  * You can connect sliders for seeking and volume adjustment to an instance of
1242  * this class. Please use setSeekSlider() and setVolumeSlider(), respectively.
1243  *
1244  * \section example Usage example
1245  *
1246  * A minimal example using this widget to play a low-res version of
1247  * <a href="http://www.bigbuckbunny.org/">Big Buck Bunny</a> might look as follows.
1248  * Please note that the actual movie URL has been shortened for the sake of clarity.
1249 \code
1250 #include <QApplication>
1251 #include "qmpwidget.h"
1252
1253 // Program entry point
1254 int main(int argc, char **argv)
1255 {
1256         QApplication app(argc, argv);
1257
1258         QMPwidget widget;
1259         widget.show();
1260         widget.start(QStringList("http://tinyurl.com/2vs2kg5"));
1261
1262         return app.exec();
1263 }
1264 \endcode
1265  *
1266  *
1267  * For further information about this project, please refer to the
1268  * <a href="index.html">main page</a>.
1269  */
1270
1271 /*!
1272  * \enum QMPwidget::State
1273  * \brief MPlayer state
1274  * \details
1275  * This enumeration is somewhat identical to <a href="http://doc.trolltech.com/phonon.html#State-enum">
1276  * Phonon's State enumeration</a>, except that it has an additional
1277  * member which is used when the MPlayer process has not been started yet (NotStartedState)
1278  *
1279  * <table>
1280  *  <tr><th>Constant</th><th>Value</th><th>Description</th></tr>
1281  *  <tr>
1282  *   <td>\p QMPwidget::NotStartedState</td>
1283  *   <td>\p -1</td>
1284  *   <td>The Mplayer process has not been started yet or has already terminated.</td>
1285  *  </tr>
1286  *  <tr>
1287  *   <td>\p QMPwidget::IdleState</td>
1288  *   <td>\p 0</td>
1289  *   <td>The MPlayer process has been started, but is idle and waiting for commands.</td>
1290  *  </tr>
1291  *  <tr>
1292  *   <td>\p QMPwidget::LoadingState</td>
1293  *   <td>\p 1</td>
1294  *   <td>The media file is being loaded, but playback has not been started yet.</td>
1295  *  </tr>
1296  *  <tr>
1297  *   <td>\p QMPwidget::StoppedState</td>
1298  *   <td>\p 2</td>
1299  *   <td>This constant is deprecated and is not being used</td>
1300  *  </tr>
1301  *  <tr>
1302  *   <td>\p QMPwidget::PlayingState</td>
1303  *   <td>\p 3</td>
1304  *   <td></td>
1305  *  </tr>
1306  *  <tr>
1307  *   <td>\p QMPwidget::BufferingState</td>
1308  *   <td>\p 4</td>
1309  *   <td></td>
1310  *  </tr>
1311  *  <tr>
1312  *   <td>\p QMPwidget::PausedState</td>
1313  *   <td>\p 5</td>
1314  *   <td></td>
1315  *  </tr>
1316  *  <tr>
1317  *   <td>\p QMPwidget::ErrorState</td>
1318  *   <td>\p 6</td>
1319  *   <td></td>
1320  *  </tr>
1321  * </table>
1322  */
1323
1324 /*!
1325  * \enum QMPwidget::Mode
1326  * \brief Video playback modes
1327  * \details
1328  * This enumeration describes valid modes for video playback. Please see \ref playbackmodes for a
1329  * detailed description of both modes.
1330  *
1331  * <table>
1332  *  <tr><th>Constant</th><th>Value</th><th>Description</th></tr>
1333  *  <tr>
1334  *   <td>\p QMPwidget::EmbeddedMode</td>
1335  *   <td>\p 0</td>
1336  *   <td>MPlayer will render directly into a Qt widget.</td>
1337  *  </tr>
1338  *  <tr>
1339  *   <td>\p QMPwidget::PipedMode</td>
1340  *   <td>\p 1</td>
1341  *   <td>MPlayer will write the video data into a FIFO which will be parsed in a seperate thread.\n
1342   The frames will be rendered by QMPwidget.</td>
1343  *  </tr>
1344  * </table>
1345  */
1346
1347 /*!
1348  * \enum QMPwidget::SeekMode
1349  * \brief Seeking modes
1350  * \details
1351  * This enumeration describes valid modes for seeking the media stream.
1352  *
1353  * <table>
1354  *  <tr><th>Constant</th><th>Value</th><th>Description</th></tr>
1355  *  <tr>
1356  *   <td>\p QMPwidget::RelativeSeek</td>
1357  *   <td>\p 0</td>
1358  *   <td>Relative seek in seconds</td>
1359  *  </tr>
1360  *  <tr>
1361  *   <td>\p QMPwidget::PercantageSeek</td>
1362  *   <td>\p 1</td>
1363  *   <td>Seek to a position given by a percentage of the whole movie duration</td>
1364  *  </tr>
1365  *  <tr>
1366  *   <td>\p QMPwidget::AbsoluteSeek</td>
1367  *   <td>\p 2</td>
1368  *   <td>Seek to a position given by an absolute time</td>
1369  *  </tr>
1370  * </table>
1371  */
1372
1373 /*!
1374  * \fn void QMPwidget::stateChanged(int state)
1375  * \brief Emitted if the state has changed
1376  * \details
1377  * This signal is emitted when the state of the MPlayer process changes.
1378  *
1379  * \param state The new state
1380  */
1381
1382 /*!
1383  * \fn void QMPwidget::error(const QString &reason)
1384  * \brief Emitted if the state has changed to QMPwidget::ErrorState
1385  * \details
1386  * This signal is emitted when the state of the MPlayer process changes to QMPwidget::ErrorState.
1387  *
1388  * \param reason Textual error description (may be empty)
1389  */
1390
1391 /*!
1392  * \fn void QMPwidget::readStandardOutput(const QString &line)
1393  * \brief Signal for reading MPlayer's standard output
1394  * \details
1395  * This signal is emitted when MPlayer wrote a line of text to its standard output channel.
1396  */
1397
1398 /*!
1399  * \fn void QMPwidget::readStandardError(const QString &line)
1400  * \brief Signal for reading MPlayer's standard error
1401  * \details
1402  * This signal is emitted when MPlayer wrote a line of text to its standard error channel.
1403  */