formats.h

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00001 // Copyright (C) 2002 Federico Montesino Pouzols <fedemp@altern.org>.
00002 // 
00003 // This program is free software; you can redistribute it and/or modify
00004 // it under the terms of the GNU General Public License as published by
00005 // the Free Software Foundation; either version 2 of the License, or
00006 // (at your option) any later version.
00007 // 
00008 // This program is distributed in the hope that it will be useful,
00009 // but WITHOUT ANY WARRANTY; without even the implied warranty of
00010 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
00011 // GNU General Public License for more details.
00012 // 
00013 // You should have received a copy of the GNU General Public License
00014 // along with this program; if not, write to the Free Software 
00015 // Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
00016 // 
00017 // As a special exception, you may use this file as part of a free software
00018 // library without restriction.  Specifically, if other files instantiate
00019 // templates or use macros or inline functions from this file, or you compile
00020 // this file and link it with other files to produce an executable, this
00021 // file does not by itself cause the resulting executable to be covered by
00022 // the GNU General Public License.  This exception does not however    
00023 // invalidate any other reasons why the executable file might be covered by
00024 // the GNU General Public License.    
00025 //
00026 // This exception applies only to the code released under the name GNU
00027 // ccRTP.  If you copy code from other releases into a copy of GNU
00028 // ccRTP, as the General Public License permits, the exception does
00029 // not apply to the code that you add in this way.  To avoid misleading
00030 // anyone as to the status of such modified files, you must delete
00031 // this exception notice from them.
00032 //
00033 // If you write modifications of your own for GNU ccRTP, it is your choice
00034 // whether to permit this exception to apply to your modifications.
00035 // If you do not wish that, delete this exception notice.
00036 //
00037 
00038 #ifndef CCXX_RTP_FORMATS_H_
00039 #define CCXX_RTP_FORMATS_H_
00040 
00041 #ifdef CCXX_NAMESPACES
00042 namespace ost {
00043 #endif
00044 
00065 typedef uint8 PayloadType;
00066 
00068 const PayloadType ptINVALID = 128;
00069 
00076 typedef enum {
00077         // Types for audio formats:
00078         sptPCMU = 0,        
00079         firstStaticPayloadType = sptPCMU,
00080         // 1016 static payload type is now deprecated. Type 1 is reserved.
00081         // spt1016,         ///< CELP audio (FED-STD 1016) (RFC 1890)
00082         sptG726_32 = 2,     
00083         sptGSM,             
00084         sptG723,            
00085         sptDVI4_8000,       
00086         sptDVI4_16000,      
00087         sptLPC,             
00088         sptPCMA,            
00089         sptG722,            
00090         sptL16_DUAL,        
00091         sptL16_MONO,        
00092         sptQCELP,           
00093         // Type 13 is reserved.
00094         sptMPA = 14,        
00095         sptG728,            
00096         sptDVI4_11025,      
00097         sptDVI4_22050,      
00098         sptG729,            
00099         // Type 19 is reserved. Types 20 - 23 are unassigned.
00100         lastStaticAudioPayloadType = sptG729,
00101 
00102         // Types for video formats:
00103         // Type 24 is unassigned.
00104         sptCELB = 25,       
00105         sptJPEG,            
00106         // Type 27 is unassigned.
00107         sptNV = 28,         
00108         // Types 29 and 30 are unassigned.
00109         sptH261 = 31,       
00110         sptMPV,             
00111         sptMP2T,            
00112         sptH263,            
00113         // Types 35 - 71 are unassigned.
00114         // Types 72 - 76 are reserved.
00115         // Types 96 - 127 are dynamic.
00116         lastStaticPayloadType = sptH263
00117 }       StaticPayloadType;
00118 
00132 class __EXPORT PayloadFormat
00133 {
00134 public:
00140         inline PayloadType getPayloadType() const
00141         { return payloadType; }
00142 
00151         inline uint32 getRTPClockRate() const
00152         { return RTPClockRate; }
00153         
00154 protected:
00158         PayloadFormat()
00159         { }
00160         
00164         inline virtual ~PayloadFormat() 
00165         { }
00166 
00172         inline void setPayloadType(PayloadType pt)
00173         { payloadType = pt; }
00174 
00180         inline void setRTPClockRate(uint32 rate)
00181         { RTPClockRate = rate; }
00182 
00183         // default clock rate
00184         static const uint32 defaultRTPClockRate;
00185 
00186 private:
00187         PayloadType payloadType;    
00188         uint32 RTPClockRate;        
00189 };
00190 
00203 class __EXPORT StaticPayloadFormat : public PayloadFormat
00204 {
00205 public:
00214         StaticPayloadFormat(StaticPayloadType type);
00215         
00216 private:
00222         static uint32 staticAudioTypesRates[lastStaticAudioPayloadType - 
00223                                             firstStaticPayloadType + 1];
00224 };
00225 
00237 class __EXPORT DynamicPayloadFormat : public PayloadFormat
00238 {
00239 public:
00247         DynamicPayloadFormat(PayloadType type, uint32 rate);
00248 };
00249  // payload 
00251 
00252 #ifdef  CCXX_NAMESPACES
00253 }
00254 #endif
00255 
00256 #endif  // ndef CCXX_RTP_FORMATS_H_
00257 

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