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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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| | | // JPEG video sources |
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| | | // C++ header |
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| | | |
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| | | #ifndef _JPEG_VIDEO_SOURCE_HH |
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| | | #define _JPEG_VIDEO_SOURCE_HH |
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| | | |
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| | | #ifndef _FRAMED_SOURCE_HH |
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| | | #include "FramedSource.hh" |
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| | | #endif |
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| | | |
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| | | class JPEGVideoSource: public FramedSource { |
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| | | public: |
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| | | virtual u_int8_t type() = 0; |
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| | | virtual u_int8_t qFactor() = 0; |
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| | | virtual u_int8_t width() = 0; // # pixels/8 (or 0 for 2048 pixels) |
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| | | virtual u_int8_t height() = 0; // # pixels/8 (or 0 for 2048 pixels) |
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| | | |
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| | | virtual u_int8_t const* quantizationTables(u_int8_t& precision, |
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| | | u_int16_t& length); |
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| | | // If "qFactor()" returns a value >= 128, then this function is called |
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| | | // to tell us the quantization tables that are being used. |
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| | | // (The default implementation of this function just returns NULL.) |
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| | | // "precision" and "length" are as defined in RFC 2435, section 3.1.8. |
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| | | |
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| | | virtual u_int16_t restartInterval(); |
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| | | // If restart intervals are being used (i.e., 64 <= type() <= 127), then this function must be |
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| | | // redefined - by a subclass - to return a non-zero value. |
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| | | |
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| | | protected: |
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| | | JPEGVideoSource(UsageEnvironment& env); // abstract base class |
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| | | virtual ~JPEGVideoSource(); |
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| | | |
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| | | private: |
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| | | // redefined virtual functions: |
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| | | virtual Boolean isJPEGVideoSource() const; |
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| | | }; |
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| | | |
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| | | #endif |
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