| /********** |
| 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) 1996-2020 Live Networks, Inc. All rights reserved. |
| // Descriptor preceding frames of 'ADU' MP3 streams (for improved loss-tolerance) |
| // C++ header |
| |
| #ifndef _MP3_ADU_DESCRIPTOR_HH |
| #define _MP3_ADU_DESCRIPTOR_HH |
| |
| // A class for handling the descriptor that begins each ADU frame: |
| // (Note: We don't yet implement fragmentation) |
| class ADUdescriptor { |
| public: |
| // Operations for generating a new descriptor |
| static unsigned computeSize(unsigned remainingFrameSize) { |
| return remainingFrameSize >= 64 ? 2 : 1; |
| } |
| static unsigned generateDescriptor(unsigned char*& toPtr, unsigned remainingFrameSize); |
| // returns descriptor size; increments "toPtr" afterwards |
| static void generateTwoByteDescriptor(unsigned char*& toPtr, unsigned remainingFrameSize); |
| // always generates a 2-byte descriptor, even if "remainingFrameSize" is |
| // small enough for a 1-byte descriptor |
| |
| // Operations for reading a descriptor |
| static unsigned getRemainingFrameSize(unsigned char*& fromPtr); |
| // increments "fromPtr" afterwards |
| }; |
| |
| #endif |