mirror of https://gerrit.osmocom.org/osmo-tetra
add bit-reordering functions for TETRA ACELP speech codec
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@ -9,7 +9,7 @@ all: conv_enc_test crc_test tetra-rx float_to_bits tunctl
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libosmo-tetra-phy.a: phy/tetra_burst_sync.o phy/tetra_burst.o
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$(AR) r $@ $^
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libosmo-tetra-mac.a: lower_mac/tetra_conv_enc.o tetra_tdma.o lower_mac/tetra_scramb.o lower_mac/tetra_rm3014.o lower_mac/tetra_interleave.o lower_mac/crc_simple.o tetra_common.o lower_mac/viterbi.o lower_mac/viterbi_cch.o lower_mac/viterbi_tch.o lower_mac/tetra_lower_mac.o tetra_upper_mac.o tetra_mac_pdu.o tetra_llc_pdu.o tetra_llc.o tetra_mle_pdu.o tetra_mm_pdu.o tetra_cmce_pdu.o tetra_sndcp_pdu.o tetra_gsmtap.o tuntap.o
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libosmo-tetra-mac.a: lower_mac/tetra_conv_enc.o lower_mac/tch_reordering.o tetra_tdma.o lower_mac/tetra_scramb.o lower_mac/tetra_rm3014.o lower_mac/tetra_interleave.o lower_mac/crc_simple.o tetra_common.o lower_mac/viterbi.o lower_mac/viterbi_cch.o lower_mac/viterbi_tch.o lower_mac/tetra_lower_mac.o tetra_upper_mac.o tetra_mac_pdu.o tetra_llc_pdu.o tetra_llc.o tetra_mle_pdu.o tetra_mm_pdu.o tetra_cmce_pdu.o tetra_sndcp_pdu.o tetra_gsmtap.o tuntap.o
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$(AR) r $@ $^
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float_to_bits: float_to_bits.o
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@ -0,0 +1,140 @@
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/* Bit re-ordering for TETRA ACELP speech codec */
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/* (C) 2011 by Harald Welte <laforge@gnumonks.org>
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*
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* All Rights Reserved
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU Affero General Public License as published by
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* the Free Software Foundation; either version 3 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU Affero General Public License for more details.
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*
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* You should have received a copy of the GNU Affero General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*
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*/
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#include <stdint.h>
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#include <string.h>
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/* EN 300 395-2 V1.3.1 Table 4 */
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#define NUM_ACELP_CLASS0_BITS 51
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/* 51 Unprotected Class0 bits */
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static const uint8_t class0_positions[NUM_ACELP_CLASS0_BITS] = {
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35, 36, 37,
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38, 39, 40,
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41, 42, 33,
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47, 48,
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56,
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61, 62, 63,
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65, 66, 67,
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68, 69, 70,
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74, 75,
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83,
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88,
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89, 90, 91,
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92, 93, 94,
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95, 96, 97,
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101, 102,
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110,
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115,
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116, 117, 118,
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119, 120, 121,
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122, 123, 124,
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128, 129,
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137
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};
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#define NUM_ACELP_CLASS1_BITS 56
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static const uint8_t class1_positions[NUM_ACELP_CLASS1_BITS] = {
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58, 85, 112,
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54, 81, 108, 135,
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50, 77,
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104, 131,
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45, 72, 99, 126,
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55, 82, 109, 136,
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5, 13, 34,
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8, 16, 17,
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22, 23, 24,
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25, 26,
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6, 14, 7, 15,
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60, 87 ,114,
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46,
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73, 100, 127,
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44, 71, 98, 125,
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33, 49,
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76, 103, 130,
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59, 86, 113,
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57, 84, 111
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};
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#define NUM_ACELP_CLASS2_BITS 30
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static const uint8_t class2_positions[NUM_ACELP_CLASS2_BITS] = {
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18, 19, 20, 21,
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31, 32,
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53, 80, 107, 134,
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1, 2, 3, 4,
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9, 10, 11, 12,
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27, 28, 29, 30,
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52, 79, 106, 133,
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51, 78, 105, 132
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};
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#define NUM_ACELP_BITS (NUM_ACELP_CLASS0_BITS+NUM_ACELP_CLASS1_BITS+NUM_ACELP_CLASS2_BITS)
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/* reorder the 432-bit incoming (decoded) type2 bits of a full-rate speech
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* frame in order to generate two consecutive 216-bit ACELP codec frames */
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void tetra_acelp_type2_to_codec(const uint8_t *in, uint8_t *out)
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{
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int bit, frame;
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const uint8_t *in_cur = in;
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for (bit = 0; bit < NUM_ACELP_CLASS0_BITS; bit++) {
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for (frame = 0; frame < 2; frame++)
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out[frame*NUM_ACELP_BITS + class0_positions[bit] - 1] = in_cur[2*bit + frame];
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}
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in_cur += 2*NUM_ACELP_CLASS0_BITS;
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for (bit = 0; bit < NUM_ACELP_CLASS1_BITS; bit++) {
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for (frame = 0; frame < 2; frame++)
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out[frame*NUM_ACELP_BITS + class1_positions[bit] - 1] = in_cur[2*bit + frame];
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}
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in_cur += 2*NUM_ACELP_CLASS1_BITS;
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for (bit = 0; bit < NUM_ACELP_CLASS2_BITS; bit++) {
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for (frame = 0; frame < 2; frame++)
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out[frame*NUM_ACELP_BITS + class2_positions[bit] - 1] = in_cur[2*bit + frame];
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}
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/* FIXME: same for STCH use */
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}
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void tetra_acelp_codec_to_acelp(const uint8_t *in, uint8_t *out)
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{
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int bit, frame;
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uint8_t *out_cur = out;
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for (bit = 0; bit < NUM_ACELP_CLASS0_BITS; bit++) {
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for (frame = 0; frame < 2; frame++)
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out_cur[2*bit + frame] = in[frame*NUM_ACELP_BITS + class0_positions[bit] - 1];
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}
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out_cur += 2*NUM_ACELP_CLASS0_BITS;
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for (bit = 0; bit < NUM_ACELP_CLASS1_BITS; bit++) {
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for (frame = 0; frame < 2; frame++)
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out_cur[2*bit + frame] = in[frame*NUM_ACELP_BITS + class1_positions[bit] - 1];
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}
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out_cur += 2*NUM_ACELP_CLASS1_BITS;
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for (bit = 0; bit < NUM_ACELP_CLASS2_BITS; bit++) {
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for (frame = 0; frame < 2; frame++)
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out_cur[2*bit + frame] = in[frame*NUM_ACELP_BITS + class2_positions[bit] - 1];
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}
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}
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