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75 lines
2.4 KiB
C++
75 lines
2.4 KiB
C++
// Copyright (C) 2010 Dirk Vanden Boer <dirk.vdb@gmail.com>
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//
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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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//
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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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//
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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., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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#ifndef MOVIEDECODER_H
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#define MOVIEDECODER_H
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#include "videoframe.h"
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#include <QString>
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extern "C" {
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#include <libavcodec/avcodec.h>
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#include <libavformat/avformat.h>
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}
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namespace ffmpegthumbnailer
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{
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class MovieDecoder
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{
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public:
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MovieDecoder(const QString& filename, AVFormatContext* pavContext = NULL);
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~MovieDecoder();
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QString getCodec();
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void seek(int timeInSeconds);
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void decodeVideoFrame();
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void getScaledVideoFrame(int scaledSize, bool maintainAspectRatio, VideoFrame& videoFrame);
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int getWidth();
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int getHeight();
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int getDuration();
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void initialize(const QString& filename);
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void destroy();
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bool getInitialized();
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private:
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void initializeVideo();
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bool decodeVideoPacket();
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bool getVideoPacket();
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void convertAndScaleFrame(PixelFormat format, int scaledSize, bool maintainAspectRatio, int& scaledWidth, int& scaledHeight);
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void createAVFrame(AVFrame** avFrame, quint8** frameBuffer, int width, int height, PixelFormat format);
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void calculateDimensions(int squareSize, bool maintainAspectRatio, int& destWidth, int& destHeight);
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private:
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int m_VideoStream;
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AVFormatContext* m_pFormatContext;
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AVCodecContext* m_pVideoCodecContext;
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AVCodec* m_pVideoCodec;
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AVStream* m_pVideoStream;
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AVFrame* m_pFrame;
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quint8* m_pFrameBuffer;
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AVPacket* m_pPacket;
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bool m_FormatContextWasGiven;
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bool m_AllowSeek;
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bool m_initialized;
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};
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}
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#endif
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