FreeCalypso > hg > gsm-codec-lib
view libgsmfr2/pack_frame2.c @ 274:52c667f17d2c
libgsmfr2: implement gsmfr_0610_encode_frame() wrapper
author | Mychaela Falconia <falcon@freecalypso.org> |
---|---|
date | Sun, 14 Apr 2024 02:57:18 +0000 |
parents | bebae251e5ee |
children |
line wrap: on
line source
/* * This module holds our gsmfr_pack_from_array() function: a drop-in * replacement for gsm_implode() from classic libgsm. */ #include <stdint.h> #include "tw_gsmfr.h" #define GSM_FR_MAGIC 0xD void gsmfr_pack_from_array(const int16_t *params, uint8_t *frame) { uint8_t *c = frame; unsigned sub; *c++ = (GSM_FR_MAGIC << 4) | ((params[0] >> 2) & 0xF); *c++ = ((params[0] & 0x3) << 6) | (params[1] & 0x3F); *c++ = ((params[2] & 0x1F) << 3) | ((params[3] >> 2) & 0x7); *c++ = ((params[3] & 0x3) << 6) | ((params[4] & 0xF) << 2) | ((params[5] >> 2) & 0x3); *c++ = ((params[5] & 0x3) << 6) | ((params[6] & 0x7) << 3) | (params[7] & 0x7); params += 8; for (sub = 0; sub < 4; sub++) { *c++ = ((params[0] & 0x7F) << 1) | ((params[1] >> 1) & 0x1); *c++ = ((params[1] & 0x1) << 7) | ((params[2] & 0x3) << 5) | ((params[3] >> 1) & 0x1F); *c++ = ((params[3] & 0x1) << 7) | ((params[4] & 0x7) << 4) | ((params[5] & 0x7) << 1) | ((params[6] >> 2) & 0x1); *c++ = ((params[6] & 0x3) << 6) | ((params[7] & 0x7) << 3) | (params[8] & 0x7); *c++ = ((params[9] & 0x7) << 5) | ((params[10] & 0x7) << 2) | ((params[11] >> 1) & 0x3); *c++ = ((params[11] & 0x1) << 7) | ((params[12] & 0x7) << 4) | ((params[13] & 0x7) << 1) | ((params[14] >> 2) & 0x1); *c++ = ((params[14] & 0x3) << 6) | ((params[15] & 0x7) << 3) | (params[16] & 0x7); params += 17; } }