| /* gprs_coding_scheme.cpp |
| * |
| * Copyright (C) 2015 by Sysmocom s.f.m.c. GmbH |
| * Author: Jacob Erlbeck <jerlbeck@sysmocom.de> |
| * |
| * This program is free software; you can redistribute it and/or |
| * modify it under the terms of the GNU General Public License |
| * as published by the Free Software Foundation; either version 2 |
| * of the License, or (at your option) any later version. |
| * |
| * This program is distributed in the hope that it will be useful, |
| * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| * GNU General Public License for more details. |
| * |
| * You should have received a copy of the GNU General Public License |
| * along with this program; if not, write to the Free Software |
| * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. |
| */ |
| |
| |
| #include "gprs_coding_scheme.h" |
| |
| static struct { |
| struct { |
| unsigned int bytes; |
| unsigned int ext_bits; |
| } uplink, downlink; |
| unsigned int data_bytes; |
| unsigned int num_blocks; |
| const char *name; |
| GprsCodingScheme::HeaderType data_hdr; |
| } mcs_info[GprsCodingScheme::NUM_SCHEMES] = { |
| {{0, 0}, {0, 0}, 0, 0, "UNKNOWN", GprsCodingScheme::HEADER_INVALID}, |
| {{23, 0}, {23, 0}, 20, 1, "CS-1", GprsCodingScheme::HEADER_GPRS_DATA}, |
| {{33, 7}, {33, 7}, 30, 1, "CS-2", GprsCodingScheme::HEADER_GPRS_DATA}, |
| {{39, 3}, {39, 3}, 36, 1, "CS-3", GprsCodingScheme::HEADER_GPRS_DATA}, |
| {{53, 7}, {53, 7}, 50, 1, "CS-4", GprsCodingScheme::HEADER_GPRS_DATA}, |
| |
| {{26, 1}, {26, 1}, 22, 1, "MCS-1", GprsCodingScheme::HEADER_EGPRS_DATA_TYPE_3}, |
| {{32, 1}, {32, 1}, 28, 1, "MCS-2", GprsCodingScheme::HEADER_EGPRS_DATA_TYPE_3}, |
| {{41, 1}, {41, 1}, 37, 1, "MCS-3", GprsCodingScheme::HEADER_EGPRS_DATA_TYPE_3}, |
| {{48, 1}, {48, 1}, 44, 1, "MCS-4", GprsCodingScheme::HEADER_EGPRS_DATA_TYPE_3}, |
| |
| {{60, 7}, {59, 6}, 56, 1, "MCS-5", GprsCodingScheme::HEADER_EGPRS_DATA_TYPE_2}, |
| {{78, 7}, {77, 6}, 74, 1, "MCS-6", GprsCodingScheme::HEADER_EGPRS_DATA_TYPE_2}, |
| {{118, 2}, {117, 4}, 56, 2, "MCS-7", GprsCodingScheme::HEADER_EGPRS_DATA_TYPE_1}, |
| {{142, 2}, {141, 4}, 68, 2, "MCS-8", GprsCodingScheme::HEADER_EGPRS_DATA_TYPE_1}, |
| {{154, 2}, {153, 4}, 74, 2, "MCS-9", GprsCodingScheme::HEADER_EGPRS_DATA_TYPE_1}, |
| }; |
| |
| |
| GprsCodingScheme GprsCodingScheme::getBySizeUL(unsigned size) |
| { |
| switch (size) { |
| case 23: return GprsCodingScheme(CS1); |
| case 27: return GprsCodingScheme(MCS1); |
| case 33: return GprsCodingScheme(MCS2); |
| case 34: return GprsCodingScheme(CS2); |
| case 40: return GprsCodingScheme(CS3); |
| case 42: return GprsCodingScheme(MCS3); |
| case 49: return GprsCodingScheme(MCS4); |
| case 54: return GprsCodingScheme(CS4); |
| case 61: return GprsCodingScheme(MCS5); |
| case 79: return GprsCodingScheme(MCS6); |
| case 119: return GprsCodingScheme(MCS7); |
| case 143: return GprsCodingScheme(MCS8); |
| case 155: return GprsCodingScheme(MCS9); |
| } |
| |
| return GprsCodingScheme(UNKNOWN); |
| } |
| |
| unsigned int GprsCodingScheme::sizeUL() const |
| { |
| return maxBytesUL() + (spareBitsUL() ? 1 : 0); |
| } |
| |
| unsigned int GprsCodingScheme::maxBytesUL() const |
| { |
| return mcs_info[m_scheme].uplink.bytes; |
| } |
| |
| unsigned int GprsCodingScheme::spareBitsUL() const |
| { |
| return mcs_info[m_scheme].uplink.ext_bits; |
| } |
| |
| unsigned int GprsCodingScheme::sizeDL() const |
| { |
| return maxBytesDL() + (spareBitsDL() ? 1 : 0); |
| } |
| |
| unsigned int GprsCodingScheme::maxBytesDL() const |
| { |
| return mcs_info[m_scheme].downlink.bytes; |
| } |
| |
| unsigned int GprsCodingScheme::spareBitsDL() const |
| { |
| return mcs_info[m_scheme].downlink.ext_bits; |
| } |
| |
| unsigned int GprsCodingScheme::maxDataBlockBytes() const |
| { |
| return mcs_info[m_scheme].data_bytes; |
| } |
| |
| unsigned int GprsCodingScheme::numDataBlocks() const |
| { |
| return mcs_info[m_scheme].num_blocks; |
| } |
| |
| const char *GprsCodingScheme::name() const |
| { |
| return mcs_info[m_scheme].name; |
| } |
| |
| GprsCodingScheme::HeaderType GprsCodingScheme::headerTypeData() const |
| { |
| return mcs_info[m_scheme].data_hdr; |
| } |