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| | |
| | | /********** |
| | | 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 3 of the License, or (at your |
| | | option) any later version. (See <http://www.gnu.org/copyleft/lesser.html>.) |
| | | |
| | | 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 |
| | | **********/ |
| | | // "liveMedia" |
| | | // Copyright (c) 1996-2017 Live Networks, Inc. All rights reserved. |
| | | // A class for streaming data from a (static) memory buffer, as if it were a file. |
| | | // C++ header |
| | | |
| | | #ifndef _BYTE_STREAM_MEMORY_BUFFER_SOURCE_HH |
| | | #define _BYTE_STREAM_MEMORY_BUFFER_SOURCE_HH |
| | | |
| | | #ifndef _FRAMED_SOURCE_HH |
| | | #include "FramedSource.hh" |
| | | #endif |
| | | |
| | | class ByteStreamMemoryBufferSource: public FramedSource { |
| | | public: |
| | | static ByteStreamMemoryBufferSource* createNew(UsageEnvironment& env, |
| | | u_int8_t* buffer, u_int64_t bufferSize, |
| | | Boolean deleteBufferOnClose = True, |
| | | unsigned preferredFrameSize = 0, |
| | | unsigned playTimePerFrame = 0); |
| | | // "preferredFrameSize" == 0 means 'no preference' |
| | | // "playTimePerFrame" is in microseconds |
| | | |
| | | u_int64_t bufferSize() const { return fBufferSize; } |
| | | |
| | | void seekToByteAbsolute(u_int64_t byteNumber, u_int64_t numBytesToStream = 0); |
| | | // if "numBytesToStream" is >0, then we limit the stream to that number of bytes, before treating it as EOF |
| | | void seekToByteRelative(int64_t offset, u_int64_t numBytesToStream = 0); |
| | | |
| | | protected: |
| | | ByteStreamMemoryBufferSource(UsageEnvironment& env, |
| | | u_int8_t* buffer, u_int64_t bufferSize, |
| | | Boolean deleteBufferOnClose, |
| | | unsigned preferredFrameSize, |
| | | unsigned playTimePerFrame); |
| | | // called only by createNew() |
| | | |
| | | virtual ~ByteStreamMemoryBufferSource(); |
| | | |
| | | private: |
| | | // redefined virtual functions: |
| | | virtual void doGetNextFrame(); |
| | | |
| | | private: |
| | | u_int8_t* fBuffer; |
| | | u_int64_t fBufferSize; |
| | | u_int64_t fCurIndex; |
| | | Boolean fDeleteBufferOnClose; |
| | | unsigned fPreferredFrameSize; |
| | | unsigned fPlayTimePerFrame; |
| | | unsigned fLastPlayTime; |
| | | Boolean fLimitNumBytesToStream; |
| | | u_int64_t fNumBytesToStream; // used iff "fLimitNumBytesToStream" is True |
| | | }; |
| | | |
| | | #endif |