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 NAMESPACE_COMMONCPP
00042 
00063 typedef uint8 PayloadType;
00064 
00066 const PayloadType ptINVALID = 128;
00067 
00074 typedef enum {
00075     // Types for audio formats:
00076     sptPCMU = 0,        
00077     firstStaticPayloadType = sptPCMU,
00078     // 1016 static payload type is now deprecated. Type 1 is reserved.
00079     // spt1016,         ///< CELP audio (FED-STD 1016) (RFC 1890)
00080     sptG726_32 = 2,     
00081     sptGSM,             
00082     sptG723,            
00083     sptDVI4_8000,       
00084     sptDVI4_16000,      
00085     sptLPC,             
00086     sptPCMA,            
00087     sptG722,            
00088     sptL16_DUAL,        
00089     sptL16_MONO,        
00090     sptQCELP,           
00091     // Type 13 is reserved.
00092     sptMPA = 14,        
00093     sptG728,            
00094     sptDVI4_11025,      
00095     sptDVI4_22050,      
00096     sptG729,            
00097     // Type 19 is reserved. Types 20 - 23 are unassigned.
00098     lastStaticAudioPayloadType = sptG729,
00099 
00100     // Types for video formats:
00101     // Type 24 is unassigned.
00102     sptCELB = 25,       
00103     sptJPEG,            
00104     // Type 27 is unassigned.
00105     sptNV = 28,         
00106     // Types 29 and 30 are unassigned.
00107     sptH261 = 31,       
00108     sptMPV,             
00109     sptMP2T,            
00110     sptH263,            
00111     // Types 35 - 71 are unassigned.
00112     // Types 72 - 76 are reserved.
00113     // Types 96 - 127 are dynamic.
00114     lastStaticPayloadType = sptH263
00115 }   StaticPayloadType;
00116 
00130 class __EXPORT PayloadFormat
00131 {
00132 public:
00138     inline PayloadType getPayloadType() const
00139     { return payloadType; }
00140 
00149     inline uint32 getRTPClockRate() const
00150     { return RTPClockRate; }
00151 
00152 protected:
00156     PayloadFormat()
00157     { }
00158 
00162     inline virtual ~PayloadFormat()
00163     { }
00164 
00170     inline void setPayloadType(PayloadType pt)
00171     { payloadType = pt; }
00172 
00178     inline void setRTPClockRate(uint32 rate)
00179     { RTPClockRate = rate; }
00180 
00181     // default clock rate
00182     static const uint32 defaultRTPClockRate;
00183 
00184 private:
00185     PayloadType payloadType;    
00186     uint32 RTPClockRate;        
00187 };
00188 
00201 class __EXPORT StaticPayloadFormat : public PayloadFormat
00202 {
00203 public:
00212     StaticPayloadFormat(StaticPayloadType type);
00213 
00214 private:
00220     static uint32 staticAudioTypesRates[lastStaticAudioPayloadType -
00221                         firstStaticPayloadType + 1];
00222 };
00223 
00235 class __EXPORT DynamicPayloadFormat : public PayloadFormat
00236 {
00237 public:
00245     DynamicPayloadFormat(PayloadType type, uint32 rate);
00246 };
00247  // payload
00249 
00250 END_NAMESPACE
00251 
00252 #endif  // ndef CCXX_RTP_FORMATS_H_
00253 

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