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https://github.com/Open-Cascade-SAS/OCCT.git
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98e6c6d17b
Introduced package Media wrapping FFmpeg structures. Media_PlayerContext class manages video decoding into Media_IFrameQueue interface. Graphic3d_MediaTextureSet implements Media_IFrameQueue interface and can be used as texture source. AIS_MediaPlayer implements simple AIS object displaying video.
134 lines
4.8 KiB
C++
134 lines
4.8 KiB
C++
// Created by: Kirill GAVRILOV
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// Copyright (c) 2019 OPEN CASCADE SAS
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//
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// This file is part of Open CASCADE Technology software library.
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//
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// This library is free software; you can redistribute it and/or modify it under
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// the terms of the GNU Lesser General Public License version 2.1 as published
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// by the Free Software Foundation, with special exception defined in the file
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// OCCT_LGPL_EXCEPTION.txt. Consult the file LICENSE_LGPL_21.txt included in OCCT
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// distribution for complete text of the license and disclaimer of any warranty.
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//
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// Alternatively, this file may be used under the terms of Open CASCADE
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// commercial license or contractual agreement.
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#ifndef _Media_FormatContext_HeaderFile
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#define _Media_FormatContext_HeaderFile
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#include <Media_Packet.hxx>
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#include <TCollection_AsciiString.hxx>
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struct AVCodecContext;
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struct AVFormatContext;
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struct AVStream;
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struct AVRational;
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//! AVFormatContext wrapper - the media input/output stream holder.
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class Media_FormatContext : public Standard_Transient
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{
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DEFINE_STANDARD_RTTIEXT(Media_FormatContext, Standard_Transient)
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public:
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//! Returns string description for AVError code.
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Standard_EXPORT static TCollection_AsciiString FormatAVErrorDescription (int theErrCodeAV);
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//! Convert time units into seconds for context.
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//! @param theTimeUnits value to convert
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//! @return converted time units in seconds
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Standard_EXPORT static double FormatUnitsToSeconds (int64_t theTimeUnits);
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//! Convert time units into seconds. Returns zero for invalid value.
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//! @param theTimeBase the timebase
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//! @param theTimeUnits value to convert
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//! @return converted time units in seconds
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Standard_EXPORT static double UnitsToSeconds (const AVRational& theTimeBase,
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int64_t theTimeUnits);
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//! Convert time units into seconds using stream base.
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//! @param theStream the stream;
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//! @param theTimeUnits value to convert;
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//! @return converted time units in seconds.
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Standard_EXPORT static double StreamUnitsToSeconds (const AVStream& theStream,
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int64_t theTimeUnits);
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//! Convert seconds into time units for context.
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//! @param theTimeSeconds value to convert
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//! @return time units
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Standard_EXPORT static int64_t SecondsToUnits (double theTimeSeconds);
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//! Convert seconds into time units.
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//! @param theTimeBase the timebase
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//! @param theTimeSeconds value to convert
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//! @return time units
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Standard_EXPORT static int64_t SecondsToUnits (const AVRational& theTimeBase,
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double theTimeSeconds);
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//! Convert seconds into time units for stream.
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//! @param theStream the stream
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//! @param theTimeSeconds value to convert
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//! @return time units
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Standard_EXPORT static int64_t StreamSecondsToUnits (const AVStream& theStream,
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double theTimeSeconds);
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//! Time formatter.
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Standard_EXPORT static TCollection_AsciiString FormatTime (double theSeconds);
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//! Time progress / duration formatter.
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Standard_EXPORT static TCollection_AsciiString FormatTimeProgress (double theProgress,
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double theDuration);
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public:
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//! Constructor.
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Standard_EXPORT Media_FormatContext();
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//! Destructor.
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Standard_EXPORT virtual ~Media_FormatContext();
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//! Return context.
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AVFormatContext* Context() const { return myFormatCtx; }
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//! Open input.
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Standard_EXPORT bool OpenInput (const TCollection_AsciiString& theInput);
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//! Close input.
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Standard_EXPORT void Close();
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//! Return amount of streams.
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Standard_EXPORT unsigned int NbSteams() const;
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//! Return stream.
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Standard_EXPORT const AVStream& Stream (unsigned int theIndex) const;
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//! Format stream info.
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Standard_EXPORT TCollection_AsciiString StreamInfo (unsigned int theIndex,
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AVCodecContext* theCodecCtx = NULL) const;
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//! Return PTS start base in seconds.
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double PtsStartBase() const { return myPtsStartBase; }
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//! Return duration in seconds.
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double Duration() const { return myDuration; }
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//! av_read_frame() wrapper.
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Standard_EXPORT bool ReadPacket (const Handle(Media_Packet)& thePacket);
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//! Seek stream to specified position.
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Standard_EXPORT bool SeekStream (unsigned int theStreamId,
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double theSeekPts,
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bool toSeekBack);
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//! Seek context to specified position.
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Standard_EXPORT bool Seek (double theSeekPts,
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bool toSeekBack);
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protected:
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AVFormatContext* myFormatCtx; //!< format context
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double myPtsStartBase; //!< start time
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double myDuration; //!< duration
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};
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#endif // _Media_FormatContext_HeaderFile
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