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2026-02-21 17:11:31 +09:00
commit 18b4338361
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--- a/project/fm_viewer/fav/FrameReader.h
+++ b/project/fm_viewer/fav/FrameReader.h
@@ -0,0 +1,84 @@
+/******************************************************************************
+    QtAV:  Multimedia framework based on Qt and FFmpeg
+    Copyright (C) 2012-2016 Wang Bin <wbsecg1@gmail.com>
+
+*   This file is part of QtAV (from 2016)
+
+    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; either
+    version 2.1 of the License, or (at your option) any later version.
+
+    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
+******************************************************************************/
+#ifndef QTAV_FRAMEREADER_H
+#define QTAV_FRAMEREADER_H
+
+#include <QtCore/QObject>
+#include "VideoFrame.h"
+
+namespace FAV {
+/*!
+ * \brief The FrameReader class
+ * while (reader->readMore()) {
+ *      while (reader->hasVideoFrame()) { //or hasEnoughVideoFrames()
+ *          reader->getVideoFrame();
+ *          ...
+ *      }
+ * }
+ * or (faster)
+ * while (reader->readMore()) {
+ *     reader->getVideoFrame(); //we can ensure 1 frame is available, but may block here
+ * }
+ * while (r.hasVideoFrame()) { //get buffered frames
+ *     reader->getVideoFrame();
+ * }
+ * TODO: multiple tracks
+ */
+class Q_AV_EXPORT FrameReader : public QObject
+{
+    Q_OBJECT
+public:
+    // TODO: load and get info
+    // TODO: asnyc option
+    explicit FrameReader(QObject *parent = 0);
+    ~FrameReader();
+    void setMedia(const QString& url);
+    QString mediaUrl() const;
+    void setVideoDecoders(const QStringList& names);
+    QStringList videoDecoders() const;
+    VideoFrame getVideoFrame();
+    bool hasVideoFrame() const;
+    bool hasEnoughVideoFrames() const;
+    // return false if eof
+    bool readMore();
+    // TODO: tryLoad on seek even at eof
+    // TODO: compress seek requests
+    bool seek(qint64 pos);
+
+Q_SIGNALS:
+    void frameRead(const FAV::VideoFrame& frame);
+    void readEnd();
+    void seekFinished(qint64 pos);
+
+    // internal
+    void readMoreRequested();
+    void seekRequested(qint64);
+
+private Q_SLOTS:
+    void readMoreInternal();
+    bool seekInternal(qint64 value);
+
+private:
+    class Private;
+    QScopedPointer<Private> d;
+};
+} //namespace FAV
+#endif // QTAV_FRAMEREADER_H