FreeCalypso > hg > gsm-codec-lib
view libgsmfr2/pack_frame.c @ 449:2af2b5c12268
Library-versions: libtwamr is officially version 1.0.0
author | Mychaela Falconia <falcon@freecalypso.org> |
---|---|
date | Fri, 10 May 2024 01:43:05 +0000 |
parents | c344b4f35eb7 |
children |
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/* * This module holds our gsmfr_pack_frame() function: packing a single GSM-FR * frame from a struct of broken-down parameters into libgsm/RTP format. */ #include <stdint.h> #include "tw_gsmfr.h" #define GSM_FR_MAGIC 0xD void gsmfr_pack_frame(const struct gsmfr_param_frame *param, uint8_t *frame) { uint8_t *c = frame; unsigned sub; *c++ = (GSM_FR_MAGIC << 4) | ((param->LARc[0] >> 2) & 0xF); *c++ = ((param->LARc[0] & 0x3) << 6) | (param->LARc[1] & 0x3F); *c++ = ((param->LARc[2] & 0x1F) << 3) | ((param->LARc[3] >> 2) & 0x7); *c++ = ((param->LARc[3] & 0x3) << 6) | ((param->LARc[4] & 0xF) << 2) | ((param->LARc[5] >> 2) & 0x3); *c++ = ((param->LARc[5] & 0x3) << 6) | ((param->LARc[6] & 0x7) << 3) | (param->LARc[7] & 0x7); for (sub = 0; sub < 4; sub++) { *c++ = ((param->Nc[sub] & 0x7F) << 1) | ((param->bc[sub] >> 1) & 0x1); *c++ = ((param->bc[sub] & 0x1) << 7) | ((param->Mc[sub] & 0x3) << 5) | ((param->xmaxc[sub] >> 1) & 0x1F); *c++ = ((param->xmaxc[sub] & 0x1) << 7) | ((param->xMc[sub][0] & 0x7) << 4) | ((param->xMc[sub][1] & 0x7) << 1) | ((param->xMc[sub][2] >> 2) & 0x1); *c++ = ((param->xMc[sub][2] & 0x3) << 6) | ((param->xMc[sub][3] & 0x7) << 3) | (param->xMc[sub][4] & 0x7); *c++ = ((param->xMc[sub][5] & 0x7) << 5) | ((param->xMc[sub][6] & 0x7) << 2) | ((param->xMc[sub][7] >> 1) & 0x3); *c++ = ((param->xMc[sub][7] & 0x1) << 7) | ((param->xMc[sub][8] & 0x7) << 4) | ((param->xMc[sub][9] & 0x7) << 1) | ((param->xMc[sub][10] >> 2) & 0x1); *c++ = ((param->xMc[sub][10] & 0x3) << 6) | ((param->xMc[sub][11] & 0x7) << 3) | (param->xMc[sub][12] & 0x7); } }