FreeCalypso > hg > vband-misc
changeset 15:528eef871e23
pcmu2efr project started
| author | Mychaela Falconia <falcon@freecalypso.org> |
|---|---|
| date | Tue, 16 Apr 2024 23:30:49 +0000 |
| parents | ec642bde2349 |
| children | 17d8ff0944a8 |
| files | .hgignore pcmu2efr/Makefile pcmu2efr/gen-efr.c pcmu2efr/gen160.c pcmu2efr/seqsyncu.c pcmu2efr/stdefr-out.c pcmu2efr/ulaw-expand.c |
| diffstat | 7 files changed, 180 insertions(+), 0 deletions(-) [+] |
line wrap: on
line diff
--- a/.hgignore Sun Apr 07 19:44:50 2024 +0000 +++ b/.hgignore Tue Apr 16 23:30:49 2024 +0000 @@ -9,6 +9,8 @@ ^dmw/gen-dmw-bin$ ^dmw/dmw-[au]law\. +^pcmu2efr/stdefr-out$ + ^ringing/genring$ ^ringing/ringing\. ^ringing/ringing-efr\.
--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/pcmu2efr/Makefile Tue Apr 16 23:30:49 2024 +0000 @@ -0,0 +1,13 @@ +CC= gcc +CFLAGS= -O2 +PROGS= stdefr-out + +STDEFR_OBJS= gen-efr.o gen160.o seqsyncu.o stdefr-out.o ulaw-expand.o + +all: ${PROGS} + +stdefr-out: ${STDEFR_OBJS} + ${CC} ${CFLAGS} -o $@ ${STDEFR_OBJS} -lgsmefr + +clean: + rm -f *.o ${PROGS}
--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/pcmu2efr/gen-efr.c Tue Apr 16 23:30:49 2024 +0000 @@ -0,0 +1,32 @@ +/* + * The code in this module takes linear_inputs[][] from gen160.c + * and generates standard EFR-encoded frames. + */ + +#include <stdio.h> +#include <stdint.h> +#include <stdlib.h> +#include <gsm_efr.h> + +extern uint16_t linear_inputs[160][160]; + +uint8_t standard_efr[160][31]; + +void +generate_std_efr(void) +{ + struct EFR_encoder_state *st; + unsigned m; + + st = EFR_encoder_create(0); + if (!st) { + fprintf(stderr, "error: EFR_encoder_create() failed\n"); + exit(1); + } + for (m = 0; m < 160; m++) { + EFR_encoder_reset(st, 0); + EFR_encode_frame(st, (const int16_t *) linear_inputs[m], + standard_efr[m], (int *) 0, (int *) 0); + } + free(st); +}
--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/pcmu2efr/gen160.c Tue Apr 16 23:30:49 2024 +0000 @@ -0,0 +1,41 @@ +/* + * The code in this module generates 160 versions of linearized seqsyncu, + * shifted by one sample each, intended for feeding to EFR and AMR encoders. + */ + +#include <stdint.h> + +extern const uint8_t seqsyncu_last_frame[160]; +extern const uint16_t pcmu_decode_table[256]; + +uint16_t linear_inputs[160][160]; + +static void +gen_first_seq(void) +{ + unsigned n; + + for (n = 0; n < 160; n++) + linear_inputs[0][n] = pcmu_decode_table[seqsyncu_last_frame[n]]; +} + +static void +gen_sequence_m(unsigned m) +{ + unsigned n, s; + + for (n = 0; n < m; n++) + linear_inputs[m][n] = 0x0008; + for (s = 0; n < 160; n++, s++) + linear_inputs[m][n] = linear_inputs[0][s]; +} + +void +generate_linear_inputs(void) +{ + unsigned m; + + gen_first_seq(); + for (m = 1; m < 160; m++) + gen_sequence_m(m); +}
--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/pcmu2efr/seqsyncu.c Tue Apr 16 23:30:49 2024 +0000 @@ -0,0 +1,20 @@ +/* + * The frame of 160 PCMU samples that is captured here in C hex array form + * appears in seqsyncu.inp (the last frame after 3 EHFs) inside ZIP archive + * ef_syn_u.exe on Disk 7 of GSM-EFR test sequence set. + */ + +#include <stdint.h> + +const uint8_t seqsyncu_last_frame[160] = { +0x1F,0xB3,0x05,0x00,0xA7,0xAF,0x8E,0x14,0x0E,0x03,0x97,0x02,0x83,0x26,0xA8,0x0B, +0x0F,0x85,0x01,0x07,0x09,0xA1,0x81,0x95,0xA8,0x0F,0x8C,0x43,0x48,0x85,0x03,0x0A, +0x2B,0x9E,0x0F,0x8B,0x06,0x1E,0x9B,0x18,0x08,0x35,0x98,0x9D,0x9F,0x1B,0x9A,0x8D, +0x09,0x25,0xA4,0x9F,0x10,0xA3,0x84,0xC8,0x31,0x09,0x2B,0x0B,0xAE,0x5E,0x8B,0x1F, +0xA5,0x05,0x89,0x07,0x87,0x0E,0x3B,0x87,0xC2,0x0D,0x85,0x33,0x1A,0x23,0x42,0x04, +0x8C,0x09,0xEE,0x16,0xDC,0xFE,0x30,0x43,0x9F,0x14,0x94,0x82,0x96,0x98,0x82,0x0F, +0x35,0x00,0x9C,0x01,0x89,0xCF,0x1E,0x18,0x08,0x09,0x82,0x93,0x01,0x81,0x84,0x88, +0x8A,0x26,0x85,0x16,0x9D,0xC0,0x84,0x97,0x2E,0x05,0x0D,0xA2,0x0A,0x13,0x08,0x87, +0x99,0x8D,0x12,0x93,0xAF,0x1D,0x82,0xBC,0x8B,0x16,0x19,0x8E,0x17,0x17,0x1E,0xA8, +0x01,0x99,0x83,0x8B,0x03,0x94,0x0C,0x8A,0x17,0x11,0x1D,0x83,0x86,0x87,0x1A,0x81, +};
--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/pcmu2efr/stdefr-out.c Tue Apr 16 23:30:49 2024 +0000 @@ -0,0 +1,31 @@ +/* + * This program computes 160 possible EFR encoder outputs using standard EFR, + * and writes the result out to a gsmx file. + */ + +#include <stdio.h> +#include <stdint.h> +#include <stdlib.h> + +extern uint8_t standard_efr[160][31]; + +main(argc, argv) + char **argv; +{ + FILE *outf; + + if (argc != 2) { + fprintf(stderr, "usage: %s gsmx-out-file\n", argv[0]); + exit(1); + } + generate_linear_inputs(); + generate_std_efr(); + outf = fopen(argv[1], "w"); + if (!outf) { + perror(argv[1]); + exit(1); + } + fwrite(standard_efr, 31, 160, outf); + fclose(outf); + exit(0); +}
--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/pcmu2efr/ulaw-expand.c Tue Apr 16 23:30:49 2024 +0000 @@ -0,0 +1,41 @@ +/* + * This module holds the table for expanding from 8-bit PCMU + * to 16-bit linear PCM. + */ + +#include <stdint.h> + +const uint16_t pcmu_decode_table[256] = { + 33412, 34436, 35460, 36484, 37508, 38532, 39556, 40580, + 41604, 42628, 43652, 44676, 45700, 46724, 47748, 48772, + 49540, 50052, 50564, 51076, 51588, 52100, 52612, 53124, + 53636, 54148, 54660, 55172, 55684, 56196, 56708, 57220, + 57604, 57860, 58116, 58372, 58628, 58884, 59140, 59396, + 59652, 59908, 60164, 60420, 60676, 60932, 61188, 61444, + 61636, 61764, 61892, 62020, 62148, 62276, 62404, 62532, + 62660, 62788, 62916, 63044, 63172, 63300, 63428, 63556, + 63652, 63716, 63780, 63844, 63908, 63972, 64036, 64100, + 64164, 64228, 64292, 64356, 64420, 64484, 64548, 64612, + 64660, 64692, 64724, 64756, 64788, 64820, 64852, 64884, + 64916, 64948, 64980, 65012, 65044, 65076, 65108, 65140, + 65164, 65180, 65196, 65212, 65228, 65244, 65260, 65276, + 65292, 65308, 65324, 65340, 65356, 65372, 65388, 65404, + 65416, 65424, 65432, 65440, 65448, 65456, 65464, 65472, + 65480, 65488, 65496, 65504, 65512, 65520, 65528, 0, + 32124, 31100, 30076, 29052, 28028, 27004, 25980, 24956, + 23932, 22908, 21884, 20860, 19836, 18812, 17788, 16764, + 15996, 15484, 14972, 14460, 13948, 13436, 12924, 12412, + 11900, 11388, 10876, 10364, 9852, 9340, 8828, 8316, + 7932, 7676, 7420, 7164, 6908, 6652, 6396, 6140, + 5884, 5628, 5372, 5116, 4860, 4604, 4348, 4092, + 3900, 3772, 3644, 3516, 3388, 3260, 3132, 3004, + 2876, 2748, 2620, 2492, 2364, 2236, 2108, 1980, + 1884, 1820, 1756, 1692, 1628, 1564, 1500, 1436, + 1372, 1308, 1244, 1180, 1116, 1052, 988, 924, + 876, 844, 812, 780, 748, 716, 684, 652, + 620, 588, 556, 524, 492, 460, 428, 396, + 372, 356, 340, 324, 308, 292, 276, 260, + 244, 228, 212, 196, 180, 164, 148, 132, + 120, 112, 104, 96, 88, 80, 72, 64, + 56, 48, 40, 32, 24, 16, 8, 0, +};