FreeCalypso > hg > gsm-codec-lib
comparison libtwamr/cnst.h @ 252:57b4053559ff
libtwamr: beginning of project
| author | Mychaela Falconia <falcon@freecalypso.org> |
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| date | Fri, 05 Apr 2024 01:02:23 +0000 |
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| 251:946849291027 | 252:57b4053559ff |
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| 1 /* | |
| 2 ***************************************************************************** | |
| 3 * | |
| 4 * GSM AMR-NB speech codec R98 Version 7.6.0 December 12, 2001 | |
| 5 * R99 Version 3.3.0 | |
| 6 * REL-4 Version 4.1.0 | |
| 7 * | |
| 8 ***************************************************************************** | |
| 9 * | |
| 10 * File : cnst.h | |
| 11 * Purpose : Speech codec constant parameters | |
| 12 * : (encoder, decoder, and postfilter) | |
| 13 * | |
| 14 ***************************************************************************** | |
| 15 */ | |
| 16 #ifndef cnst_h | |
| 17 #define cnst_h "$Id $" | |
| 18 | |
| 19 #define L_TOTAL 320 /* Total size of speech buffer. */ | |
| 20 #define L_WINDOW 240 /* Window size in LP analysis */ | |
| 21 #define L_FRAME 160 /* Frame size */ | |
| 22 #define L_FRAME_BY2 80 /* Frame size divided by 2 */ | |
| 23 #define L_SUBFR 40 /* Subframe size */ | |
| 24 #define L_CODE 40 /* codevector length */ | |
| 25 #define NB_TRACK 5 /* number of tracks */ | |
| 26 #define STEP 5 /* codebook step size */ | |
| 27 #define NB_TRACK_MR102 4 /* number of tracks mode mr102 */ | |
| 28 #define STEP_MR102 4 /* codebook step size mode mr102 */ | |
| 29 #define M 10 /* Order of LP filter */ | |
| 30 #define MP1 (M+1) /* Order of LP filter + 1 */ | |
| 31 #define LSF_GAP 205 /* Minimum distance between LSF after quan- | |
| 32 tization; 50 Hz = 205 */ | |
| 33 #define LSP_PRED_FAC_MR122 21299 /* MR122 LSP prediction factor (0.65 Q15) */ | |
| 34 #define AZ_SIZE (4*M+4) /* Size of array of LP filters in 4 subfr.s */ | |
| 35 #define PIT_MIN_MR122 18 /* Minimum pitch lag (MR122 mode) */ | |
| 36 #define PIT_MIN 20 /* Minimum pitch lag (all other modes) */ | |
| 37 #define PIT_MAX 143 /* Maximum pitch lag */ | |
| 38 #define L_INTERPOL (10+1) /* Length of filter for interpolation */ | |
| 39 #define L_INTER_SRCH 4 /* Length of filter for CL LTP search | |
| 40 interpolation */ | |
| 41 | |
| 42 #define MU 26214 /* Factor for tilt compensation filter 0.8 */ | |
| 43 #define AGC_FAC 29491 /* Factor for automatic gain control 0.9 */ | |
| 44 | |
| 45 #define L_NEXT 40 /* Overhead in LP analysis */ | |
| 46 #define SHARPMAX 13017 /* Maximum value of pitch sharpening */ | |
| 47 #define SHARPMIN 0 /* Minimum value of pitch sharpening */ | |
| 48 | |
| 49 | |
| 50 #define MAX_PRM_SIZE 57 /* max. num. of params */ | |
| 51 #define MAX_SERIAL_SIZE 244 /* max. num. of serial bits */ | |
| 52 | |
| 53 #define GP_CLIP 15565 /* Pitch gain clipping = 0.95 */ | |
| 54 #define N_FRAME 7 /* old pitch gains in average calculation */ | |
| 55 | |
| 56 #define EHF_MASK 0x0008 /* encoder homing frame pattern */ | |
| 57 | |
| 58 #endif |