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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 as published by the |
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| | | Free Software Foundation; either version 3 of the License, or (at your |
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| | | option) any later version. (See <http://www.gnu.org/copyleft/lesser.html>.) |
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| | | |
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| | | This library is distributed in the hope that it will be useful, but WITHOUT |
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| | | ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS |
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| | | FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License for |
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| | | more details. |
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| | | |
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| | | You should have received a copy of the GNU Lesser General Public License |
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| | | along with this library; if not, write to the Free Software Foundation, Inc., |
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| | | 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA |
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| | | **********/ |
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| | | // "liveMedia" |
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| | | // Copyright (c) 1996-2017 Live Networks, Inc. All rights reserved. |
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| | | // A file source that is a plain byte stream (rather than frames) |
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| | | // C++ header |
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| | | |
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| | | #ifndef _BYTE_STREAM_FILE_SOURCE_HH |
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| | | #define _BYTE_STREAM_FILE_SOURCE_HH |
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| | | |
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| | | #ifndef _FRAMED_FILE_SOURCE_HH |
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| | | #include "FramedFileSource.hh" |
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| | | #endif |
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| | | |
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| | | class ByteStreamFileSource: public FramedFileSource { |
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| | | public: |
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| | | static ByteStreamFileSource* createNew(UsageEnvironment& env, |
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| | | char const* fileName, |
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| | | unsigned preferredFrameSize = 0, |
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| | | unsigned playTimePerFrame = 0); |
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| | | // "preferredFrameSize" == 0 means 'no preference' |
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| | | // "playTimePerFrame" is in microseconds |
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| | | |
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| | | static ByteStreamFileSource* createNew(UsageEnvironment& env, |
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| | | FILE* fid, |
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| | | unsigned preferredFrameSize = 0, |
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| | | unsigned playTimePerFrame = 0); |
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| | | // an alternative version of "createNew()" that's used if you already have |
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| | | // an open file. |
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| | | |
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| | | u_int64_t fileSize() const { return fFileSize; } |
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| | | // 0 means zero-length, unbounded, or unknown |
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| | | |
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| | | void seekToByteAbsolute(u_int64_t byteNumber, u_int64_t numBytesToStream = 0); |
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| | | // if "numBytesToStream" is >0, then we limit the stream to that number of bytes, before treating it as EOF |
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| | | void seekToByteRelative(int64_t offset, u_int64_t numBytesToStream = 0); |
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| | | void seekToEnd(); // to force EOF handling on the next read |
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| | | |
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| | | protected: |
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| | | ByteStreamFileSource(UsageEnvironment& env, |
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| | | FILE* fid, |
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| | | unsigned preferredFrameSize, |
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| | | unsigned playTimePerFrame); |
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| | | // called only by createNew() |
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| | | |
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| | | virtual ~ByteStreamFileSource(); |
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| | | |
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| | | static void fileReadableHandler(ByteStreamFileSource* source, int mask); |
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| | | void doReadFromFile(); |
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| | | |
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| | | private: |
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| | | // redefined virtual functions: |
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| | | virtual void doGetNextFrame(); |
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| | | virtual void doStopGettingFrames(); |
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| | | |
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| | | protected: |
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| | | u_int64_t fFileSize; |
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| | | |
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| | | private: |
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| | | unsigned fPreferredFrameSize; |
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| | | unsigned fPlayTimePerFrame; |
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| | | Boolean fFidIsSeekable; |
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| | | unsigned fLastPlayTime; |
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| | | Boolean fHaveStartedReading; |
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| | | Boolean fLimitNumBytesToStream; |
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| | | u_int64_t fNumBytesToStream; // used iff "fLimitNumBytesToStream" is True |
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| | | }; |
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| | | |
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| | | #endif |
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