MythTV: g711.h Source File

00001 #ifndef G711_H_
00002 #define G711_H_
00003 
00004 #include <qsocketdevice.h>
00005 #include "rtp.h"
00006 
00007 extern "C" {
00008 #include "gsm/gsm.h"
00009 }
00010 
00011 extern uchar alaw_comp_table[16384];
00012 extern uchar ulaw_comp_table[16384];
00013 extern short alaw_exp_table[256];
00014 extern short ulaw_exp_table[256];
00015 
00016 class g711alaw : public codec
00017 {
00018 public:
00019     g711alaw() :codec() {};
00020     ~g711alaw() {};
00021     virtual int Decode(uchar *In, short *out, int Len, short &maxPower);
00022     virtual int Encode(short *In, uchar *out, int Samples, short &maxPower, int gain);
00023     virtual int Silence(uchar *out, int ms);
00024     virtual QString WhoAreYou() { return "G711a"; }
00025     virtual int bandwidth()     { return 106; } // 106kbps including PPP and ATM overheads
00026 private:
00027 };
00028 
00029 class g711ulaw : public codec
00030 {
00031 public:
00032     g711ulaw() :codec() {};
00033     ~g711ulaw() {};
00034     virtual int Decode(uchar *In, short *out, int Len, short &maxPower);
00035     virtual int Encode(short *In, uchar *out, int Samples, short &maxPower, int gain);
00036     virtual int Silence(uchar *out, int ms);
00037     virtual QString WhoAreYou() { return "G711u"; };
00038     virtual int bandwidth()     { return 106; } // 106kbps including PPP and ATM overheads
00039 private:
00040 };
00041 
00042 class gsmCodec : public codec
00043 {
00044 public:
00045     gsmCodec();
00046     ~gsmCodec();
00047     virtual int Decode(uchar *In, short *out, int Len, short &maxPower);
00048     virtual int Encode(short *In, uchar *out, int Samples, short &maxPower, int gain);
00049     virtual int Silence(uchar *out, int ms);
00050     virtual QString WhoAreYou() { return "GSM"; };
00051     virtual int bandwidth()     { return 43; } // 43kbps including PPP and ATM overheads
00052 private:
00053     gsm gsmEncData;
00054     gsm gsmDecData;
00055     bool gsmMicrosoftCompatability;
00056 };
00057 
00058 #ifdef VA_G729
00059 class g729 : public codec
00060 {
00061 public:
00062     g729();
00063     ~g729() {};
00064     virtual int Decode(uchar *In, short *out, int Len, short &maxPower);
00065     virtual int Encode(short *In, uchar *out, int Samples, short &maxPower, int gain);
00066     virtual int Silence(uchar *out, int ms);
00067     virtual QString WhoAreYou() { return "G729"; };
00068     virtual int bandwidth()     { return 43; } // 43kbps including PPP and ATM overheads
00069 private:
00070 };
00071 #endif
00072 
00073 #endif