/**********
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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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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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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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// Descriptor preceding frames of 'ADU' MP3 streams (for improved loss-tolerance)
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// C++ header
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#ifndef _MP3_ADU_DESCRIPTOR_HH
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#define _MP3_ADU_DESCRIPTOR_HH
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// A class for handling the descriptor that begins each ADU frame:
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// (Note: We don't yet implement fragmentation)
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class ADUdescriptor {
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public:
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// Operations for generating a new descriptor
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static unsigned computeSize(unsigned remainingFrameSize) {
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return remainingFrameSize >= 64 ? 2 : 1;
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}
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static unsigned generateDescriptor(unsigned char*& toPtr, unsigned remainingFrameSize);
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// returns descriptor size; increments "toPtr" afterwards
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static void generateTwoByteDescriptor(unsigned char*& toPtr, unsigned remainingFrameSize);
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// always generates a 2-byte descriptor, even if "remainingFrameSize" is
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// small enough for a 1-byte descriptor
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// Operations for reading a descriptor
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static unsigned getRemainingFrameSize(unsigned char*& fromPtr);
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// increments "fromPtr" afterwards
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};
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#endif
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