simpleaudiopacket.h

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// ##########################################################################
// ####                                                                  ####
// ####                      RTP Audio Server Project                    ####
// ####                    ============================                  ####
// ####                                                                  ####
// #### Simple Audio Packet                                              ####
// ####                                                                  ####
// ####           Copyright (C) 1999-2012 by Thomas Dreibholz            ####
// ####                                                                  ####
// #### Contact:                                                         ####
// ####    EMail: dreibh@iem.uni-due.de                                  ####
// ####    WWW:   https://www.nntb.no/~dreibh/rtpaudio                ####
// ####                                                                  ####
// #### ---------------------------------------------------------------- ####
// ####                                                                  ####
// #### This program is free software: you can redistribute it and/or    ####
// #### modify it under the terms of the GNU General Public License as   ####
// #### published by the Free Software Foundation, either version 3 of   ####
// #### the License, or (at your option) any later version.              ####
// ####                                                                  ####
// #### This program 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 General Public License for more details.                     ####
// ####                                                                  ####
// #### You should have received a copy of the GNU General Public        ####
// #### License along with this program.  If not, see                    ####
// #### <http://www.gnu.org/licenses/>.                                  ####
// ####                                                                  ####
// ##########################################################################
// $Id: simpleaudiopacket.h 1286 2011-12-18 13:43:16Z dreibh $


#ifndef SIMPLEAUDIOPACKET_H
#define SIMPLEAUDIOPACKET_H


#include "tdsystem.h"
#include "mediainfo.h"
#include "audioquality.h"


struct SimpleAudioPacket
{
   // ====== Constructor ====================================================
   public:
   SimpleAudioPacket();

   // ====== Byte order translation =========================================
   void translate();


   // ====== Status functions ===============================================
   void reset();


   // ====== Constants ======================================================
   static const card16 SimpleAudioTypeID = 0x2960;

   static const char SimpleAudioTypeName[];

   static const card32 SimpleAudioFormatID = 0x74660000 | SimpleAudioTypeID;

   static const cardinal SimpleAudioMediaInfoPacketsPerSecond = 1;

   static const cardinal SimpleAudioFramesPerSecond = 15;

   static const cardinal SimpleAudioFrameSize = 2352 * 5;

   static const cardinal SimpleAudioMaxTransferDelay = 1500 * 16; // 1500 ms.

   static const cardinal SimpleAudioQualityLevels = AudioQuality::QualityLevels;


   static AudioQuality calculateQualityForLimits(
                          const AudioQualityInterface& userSetting,
                          const AudioQualityInterface& inputQuality,
                          const card64                 totalByteRateLimit,
                          const cardinal               networkQualityDecrement,
                          const cardinal               headerSize,
                          const cardinal               maxPacketSize);


   static cardinal calculateFrameSize(const cardinal inputBytesPerSecond,
                                      const cardinal inputFrameSize);


   // ====== Packet data ====================================================
   public:
   card32 FormatID;

   card16 SamplingRate;

   card8 Channels;

   card8 Bits;

   card64 Position;

   card64 MaxPosition;

   card8 ErrorCode;

   card8 Flags;

   enum SimpleAudioFlags {
      SAF_Data      = 0,
      SAF_MediaInfo = 1,
   };

   char Data[];
} __attribute__((packed));


#endif