diff options
| author | Harald Welte <laforge@gnumonks.org> | 2010-07-09 16:09:18 +0200 |
|---|---|---|
| committer | Harald Welte <laforge@gnumonks.org> | 2010-07-09 16:09:18 +0200 |
| commit | 903a15fc26e225c2559c98eba362e29f09de3d2c (patch) | |
| tree | 5680b3c68a728df86092a5b8a4756625724025c3 /data/mnet/GP10/Dsp/bbdataproc/chcodec/Siddetect.c | |
This is the source code as it was published on vovida.org a couple
of years ago. The filename was gsml-1_0.tar.bz2
Diffstat (limited to 'data/mnet/GP10/Dsp/bbdataproc/chcodec/Siddetect.c')
| -rw-r--r-- | data/mnet/GP10/Dsp/bbdataproc/chcodec/Siddetect.c | 99 |
1 files changed, 99 insertions, 0 deletions
diff --git a/data/mnet/GP10/Dsp/bbdataproc/chcodec/Siddetect.c b/data/mnet/GP10/Dsp/bbdataproc/chcodec/Siddetect.c new file mode 100644 index 0000000..ed744b2 --- /dev/null +++ b/data/mnet/GP10/Dsp/bbdataproc/chcodec/Siddetect.c @@ -0,0 +1,99 @@ +/****************************************************************************
+* (c) Copyright Cisco 2000
+* All Rights Reserved
+*****************************************************************************/
+/*****************************************************************************
+**
+** Description:
+** Contains functions that perform SID code detection from a RTP frame of
+** 264 bits
+**
+*****************************************************************************/
+#include "gsmdata.h"
+#include "bbdata.h"
+#include "bbproto.h"
+#include "codec.h"
+
+#define GSM_FR_SID_LEN 95
+
+/*
+* GSM SID bit positions in 264-bits Traffic frame
+*/
+Uint16 const gsmFrSidBits [GSM_FR_SID_LEN] =
+{
+ 58-4, 59-4, 61-4, 62-4, 64-4, 65-4, 67-4, 68-4, 70-4, 71-4, 73-4, 74-4, 76-4, 77-4, 79-4, 80-4, 82-4, 83-4, 85-4, 86-4, 88-4, 89-4, 91-4, 92-4, 94-4, 95-4, 114-4,
+ 115-4, 117-4, 118-4, 120-4, 121-4, 123-4, 124-4, 126-4, 127-4, 129-4, 130-4, 132-4, 133-4, 135-4, 136-4, 138-4, 139-4, 141-4, 142-4, 144-4, 145-4, 147-4,
+ 148-4, 150-4, 151-4, 170-4, 171-4, 173-4, 174-4, 176-4, 177-4, 179-4, 180-4, 182-4, 183-4, 185-4, 186-4, 188-4, 189-4, 191-4, 192-4, 194-4, 195-4, 197-4,
+ 198-4, 200-4, 201-4, 203-4, 204-4, 206-4, 207-4, 226-4, 227-4, 229-4, 230-4, 232-4, 233-4, 235-4, 236-4, 238-4, 241-4, 244-4, 247-4, 250-4, 253-4, 256-4, 259-4,
+ 262-4
+};
+
+#define GSM_EFR_SID_LEN 95
+static const Uint8 gsmEfrSidBits[GSM_EFR_SID_LEN] =
+{
+ 45, 46, 48, 49, 50, 51, 52, 53, 54, 55,
+ 56, 57, 58, 59, 60, 61, 62, 63, 64, 65,
+ 66, 67, 68, 94, 95, 96, 98, 99, 100, 101,
+ 102, 103, 104, 105, 106, 107, 108, 109, 110, 111,
+ 112, 113, 114, 115, 116, 117, 118, 148, 149, 150,
+ 151, 152, 153, 154, 155, 156, 157, 158, 159, 160,
+ 161, 162, 163, 164, 165, 166, 167, 168, 169, 170,
+ 171, 196, 197, 198, 199, 200, 201, 202, 203, 204,
+ 205, 206, 207, 208, 209, 212, 213, 214, 215, 216,
+ 217, 218, 219, 220, 221
+};
+
+Uint8 sidDetection(Uint8 *speechBits, t_vocAlgo vocoAlgo)
+{
+
+ Uint8 i;
+
+ Uint8 sidCode = 0;
+ Uint8 sidFlag;
+
+ switch( vocoAlgo )
+ {
+ case VOC_GSMF:
+ for(i=0; i<GSM_FR_SID_LEN; i++)
+ {
+ sidCode += speechBits[gsmFrSidBits[i]];
+ }
+
+ if(sidCode < 2)
+ {
+ sidFlag = 2;
+ }
+ else if(sidCode < 16)
+ {
+ sidFlag = 1;
+ }
+ else
+ sidFlag = 0;
+
+ break;
+
+ case VOC_EFR:
+ for(i=0; i<GSM_FR_SID_LEN; i++)
+ {
+ sidCode += speechBits[gsmEfrSidBits[i]];
+ }
+
+ if(sidCode > 93)
+ {
+ sidFlag = 2;
+ }
+ else if(sidCode > 79)
+ {
+ sidFlag = 1;
+ }
+ else
+ sidFlag = 0;
+
+ break;
+
+ default:
+ sidFlag = 0;
+ break;
+ }
+ return(sidFlag);
+}
\ No newline at end of file |