FreeCalypso > hg > gsm-codec-lib
view efrtest/tidsp.c @ 282:9ee8ad3d4d30
frtest: rm gsmfr-hand-test and gsmfr-max-out utils
These hack programs were never properly documented and were written
only as part of a debug chase, in pursuit of a bug that ultimately
turned out to be in our then-hacky patch to osmo-bts-sysmo,
before beginning of proper patches in Osmocom. These hack programs
need to be dropped from the present sw package because they depend
on old libgsm, and we are eliminating that dependency.
author | Mychaela Falconia <falcon@freecalypso.org> |
---|---|
date | Sun, 14 Apr 2024 05:44:47 +0000 |
parents | 5efc377326da |
children |
line wrap: on
line source
/* * The utility function implemented in this module extracts a 244-bit EFR * codec frame from a 33-byte readout of Calypso DSP buffer, and presents * this frame in the RTP encoding format of ETSI TS 101 318. */ #include <stdint.h> static const uint16_t efr_to_tidsp_table[244] = { 50, 24, 25, 37, 38, 43, 44, 26, 42, 27, 39, 40, 45, 51, 52, 41, 46, 28, 29, 47, 53, 77, 78, 30, 54, 55, 79, 56, 80, 109, 110, 111, 112, 113, 114, 115, 180, 181, 0, 1, 2, 3, 4, 5, 20, 31, 32, 16, 73, 105, 157, 81, 118, 138, 165, 82, 119, 139, 166, 83, 120, 140, 167, 84, 121, 141, 168, 85, 122, 186, 200, 204, 224, 244, 205, 225, 245, 206, 226, 246, 207, 227, 247, 208, 228, 248, 17, 61, 101, 153, 161, 12, 13, 22, 35, 48, 116, 18, 74, 106, 158, 86, 123, 142, 169, 87, 124, 143, 170, 88, 125, 144, 171, 89, 126, 145, 172, 90, 127, 189, 201, 209, 229, 249, 210, 230, 250, 211, 231, 251, 212, 232, 252, 213, 233, 253, 19, 62, 102, 154, 162, 6, 7, 8, 9, 10, 11, 21, 33, 34, 57, 75, 107, 159, 91, 128, 146, 173, 92, 129, 147, 174, 93, 130, 148, 175, 94, 131, 149, 176, 95, 132, 192, 202, 214, 234, 254, 215, 235, 255, 216, 236, 256, 217, 237, 257, 218, 238, 258, 59, 63, 103, 155, 163, 14, 15, 23, 36, 49, 117, 58, 76, 108, 160, 96, 133, 150, 177, 97, 134, 198, 199, 98, 135, 151, 178, 99, 136, 152, 179, 100, 137, 195, 203, 219, 239, 259, 220, 240, 260, 221, 241, 261, 222, 242, 262, 223, 243, 263, 60, 64, 104, 156, 164 }; static int msb_get_bit(buf, bn) uint8_t *buf; { int pos_byte = bn >> 3; int pos_bit = 7 - (bn & 7); return (buf[pos_byte] >> pos_bit) & 1; } static void msb_set_bit(buf, bn, bit) uint8_t *buf; { int pos_byte = bn >> 3; int pos_bit = 7 - (bn & 7); if (bit) buf[pos_byte] |= (1 << pos_bit); else buf[pos_byte] &= ~(1 << pos_bit); } void efr_tidsp_to_std(inbytes, outbytes) uint8_t *inbytes, *outbytes; { int i, si; outbytes[0] = 0xC0; for (i = 0; i < 244; i++) { si = efr_to_tidsp_table[i]; msb_set_bit(outbytes, i + 4, msb_get_bit(inbytes, si)); } }