gr-vocoder: reimplemented gr-gsm-fr-vocoder in gr-vocoder

1 files changed, 63 insertions, 0 deletions

diff --git a/gr-vocoder/lib/gsm/table.c b/gr-vocoder/lib/gsm/table.c
new file mode 100644
index 000000000..16a04118c
--- /dev/null
+++ b/gr-vocoder/lib/gsm/table.c
@@ -0,0 +1,63 @@
+/*
+ * Copyright 1992 by Jutta Degener and Carsten Bormann, Technische
+ * Universitaet Berlin.  See the accompanying file "COPYRIGHT" for
+ * details.  THERE IS ABSOLUTELY NO WARRANTY FOR THIS SOFTWARE.
+ */
+
+/* $Header$ */
+
+/*  Most of these tables are inlined at their point of use.
+ */
+
+/*  4.4 TABLES USED IN THE FIXED POINT IMPLEMENTATION OF THE RPE-LTP
+ *      CODER AND DECODER
+ *
+ *	(Most of them inlined, so watch out.)
+ */
+
+#define	GSM_TABLE_C
+#include "private.h"
+#include	"gsm.h"
+
+/*  Table 4.1  Quantization of the Log.-Area Ratios
+ */
+/* i 		     1      2      3        4      5      6        7       8 */
+word gsm_A[8]   = {20480, 20480, 20480,  20480,  13964,  15360,   8534,  9036};
+word gsm_B[8]   = {    0,     0,  2048,  -2560,     94,  -1792,   -341, -1144};
+word gsm_MIC[8] = { -32,   -32,   -16,    -16,     -8,     -8,     -4,    -4 };
+word gsm_MAC[8] = {  31,    31,    15,     15,      7,      7,      3,     3 };
+
+
+/*  Table 4.2  Tabulation  of 1/A[1..8]
+ */
+word gsm_INVA[8]={ 13107, 13107,  13107, 13107,  19223, 17476,  31454, 29708 };
+
+
+/*   Table 4.3a  Decision level of the LTP gain quantizer
+ */
+/*  bc		      0	        1	  2	     3			*/
+word gsm_DLB[4] = {  6554,    16384,	26214,	   32767	};
+
+
+/*   Table 4.3b   Quantization levels of the LTP gain quantizer
+ */
+/* bc		      0          1        2          3			*/
+word gsm_QLB[4] = {  3277,    11469,	21299,	   32767	};
+
+
+/*   Table 4.4	 Coefficients of the weighting filter
+ */
+/* i		    0      1   2    3   4      5      6     7   8   9    10  */
+word gsm_H[11] = {-134, -374, 0, 2054, 5741, 8192, 5741, 2054, 0, -374, -134 };
+
+
+/*   Table 4.5 	 Normalized inverse mantissa used to compute xM/xmax 
+ */
+/* i		 	0        1    2      3      4      5     6      7   */
+word gsm_NRFAC[8] = { 29128, 26215, 23832, 21846, 20165, 18725, 17476, 16384 };
+
+
+/*   Table 4.6	 Normalized direct mantissa used to compute xM/xmax
+ */
+/* i                  0      1       2      3      4      5      6      7   */
+word gsm_FAC[8]	= { 18431, 20479, 22527, 24575, 26623, 28671, 30719, 32767 };