Commit d9501248 authored by knopp's avatar knopp

Merge branch 'enhancement-10-harmony' of...

Merge branch 'enhancement-10-harmony' of https://gitlab.eurecom.fr/oai/openairinterface5g into enhancement-10-harmony

Conflicts:
	targets/RT/USER/lte-softmodem.c
parents 89a9be9b b804f1e4
......@@ -963,7 +963,7 @@ set(PHY_SRC
${OPENAIR1_DIR}/PHY/LTE_TRANSPORT/print_stats.c
${OPENAIR1_DIR}/PHY/LTE_TRANSPORT/initial_sync.c
${OPENAIR1_DIR}/PHY/LTE_TRANSPORT/if4_tools.c
${OPENAIR1_DIR}/PHY/LTE_TRANSPORT/if5_mobipass_tools.c
${OPENAIR1_DIR}/PHY/LTE_TRANSPORT/if5_tools.c
${OPENAIR1_DIR}/PHY/MODULATION/ofdm_mod.c
${OPENAIR1_DIR}/PHY/MODULATION/slot_fep.c
${OPENAIR1_DIR}/PHY/MODULATION/slot_fep_mbsfn.c
......
......@@ -296,9 +296,6 @@ function main() {
if [ "$HW" = "None" -a "$TP" = "None" ] ; then
echo_fatal "Define a local radio head (e.g. -w EXMIMO) or a transport protocol (e.g. -t ETHERNET) to communicate with a remote radio head!"
fi
if [ "$HW" != "None" -a "$TP" != "None" ] ; then
echo_fatal "Currently eNB can not support simultaniously local and remote radio heads!!"
fi
if [ "$HW" = "None" ] ; then
echo_info "No radio head has been selected (HW set to $HW)"
fi
......
This diff is collapsed.
......@@ -38,7 +38,6 @@
* \warning
*/
#include <stdint.h>
#include "PHY/defs.h"
/// Macro for IF4 packet type
......@@ -57,7 +56,7 @@ struct IF4_header {
/// Frame Status
uint32_t frame_status;
};
} __attribute__ ((__packed__));
typedef struct IF4_header IF4_header_t;
#define sizeof_IF4_header_t 12
......@@ -71,3 +70,5 @@ void gen_IF4_prach_header(IF4_header_t*, int, int);
void send_IF4(PHY_VARS_eNB*, int, int, uint16_t, int);
void recv_IF4(PHY_VARS_eNB*, int*, int*, uint16_t*, uint32_t*);
void malloc_IF4_buffer(PHY_VARS_eNB*);
#include <stdint.h>
#include "PHY/defs.h"
#include "PHY/LTE_TRANSPORT/if5_mobipass_tools.h"
#include "targets/ARCH/ETHERNET/USERSPACE/LIB/if_defs.h"
uint8_t send_IF5(PHY_VARS_eNB *eNB, eNB_rxtx_proc_t *proc, uint8_t init_seq) {
uint8_t seqno=init_seq;
void *txp[2];
void *tx_buffer=NULL;
__m128i *data_block=NULL,*main_data_block=NULL;
__m128i *txp128;
__m128i t0, t1;
uint16_t packet_id=0, i;
uint16_t db_fulllength = 640;
tx_buffer = memalign(16, MAC_HEADER_SIZE_BYTES + sizeof_IF5_mobipass_header_t + db_fulllength*sizeof(int16_t));
IF5_mobipass_header_t *header = (IF5_mobipass_header_t *)(tx_buffer + MAC_HEADER_SIZE_BYTES);
data_block = (__m128i *)(tx_buffer + MAC_HEADER_SIZE_BYTES + sizeof_IF5_mobipass_header_t + 4);
main_data_block = data_block;
header->flags = 0;
header->fifo_status = 0;
header->ack = 0;
header->seqno = seqno;
header->rsvd = 0;
txp[0] = (void*)&eNB->common_vars.txdata[0][0][proc->subframe_tx*eNB->frame_parms.samples_per_tti];
txp128 = (__m128i *) txp[0];
for (packet_id=0; packet_id<(7680*2)/640; packet_id++) {
header->time_stamp = proc->timestamp_tx + packet_id*640;
data_block = main_data_block;
for (i=0; i<db_fulllength>>3; i+=2) {
t0 = _mm_srli_epi16(*txp128++, 4);
t1 = _mm_srli_epi16(*txp128++, 4);
*data_block++ = _mm_packs_epi16(t0, t1);
}
// Write the packet to the fronthaul
if ((eNB->ifdevice.trx_write_func(&eNB->ifdevice,
packet_id,
&tx_buffer,
db_fulllength,
1,
IF5_MOBIPASS)) < 0) {
perror("ETHERNET write for IF5_MOBIPASS\n");
}
header->seqno += 1;
}
seqno = header->seqno;
free(tx_buffer);
return(seqno);
}
#include <stdint.h>
#include "PHY/defs.h"
#define IF5_MOBIPASS 0x0050
struct IF5_mobipass_header {
/// Type
uint16_t flags;
/// Sub-Type
uint16_t fifo_status;
/// Reserved
uint8_t seqno;
uint8_t ack;
uint32_t rsvd;
/// Frame Status
uint32_t time_stamp;
} __attribute__ ((__packed__));
typedef struct IF5_mobipass_header IF5_mobipass_header_t;
#define sizeof_IF5_mobipass_header_t 14
uint8_t send_IF5(PHY_VARS_eNB*, eNB_rxtx_proc_t*, uint8_t);
/*******************************************************************************
OpenAirInterface
Copyright(c) 1999 - 2014 Eurecom
OpenAirInterface 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 3 of the License, or
(at your option) any later version.
OpenAirInterface 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 OpenAirInterface.The full GNU General Public License is
included in this distribution in the file called "COPYING". If not,
see <http://www.gnu.org/licenses/>.
Contact Information
OpenAirInterface Admin: openair_admin@eurecom.fr
OpenAirInterface Tech : openair_tech@eurecom.fr
OpenAirInterface Dev : openair4g-devel@lists.eurecom.fr
Address : Eurecom, Campus SophiaTech, 450 Route des Chappes, CS 50193 - 06904 Biot Sophia Antipolis cedex, FRANCE
*******************************************************************************/
/*! \file PHY/LTE_TRANSPORT/if5_tools.c
* \brief
* \author S. Sandeep Kumar, Raymond Knopp
* \date 2016
* \version 0.1
* \company Eurecom
* \email: ee13b1025@iith.ac.in, knopp@eurecom.fr
* \note
* \warning
*/
#include "PHY/defs.h"
#include "targets/ARCH/ETHERNET/USERSPACE/LIB/if_defs.h"
void send_IF5(PHY_VARS_eNB *eNB, openair0_timestamp proc_timestamp, int subframe, uint8_t *seqno, uint16_t packet_type) {
LTE_DL_FRAME_PARMS *fp=&eNB->frame_parms;
void *txp[fp->nb_antennas_tx], *rxp[fp->nb_antennas_rx];
void *tx_buffer=NULL;
uint16_t packet_id=0, i=0;
if (packet_type == IF5_RRH_GW_DL) {
unsigned int spp_eth = eNB->ifdevice.openair0_cfg->samples_per_packet;
unsigned int spsf = eNB->ifdevice.openair0_cfg->samples_per_frame/10;
for (i=0; i < fp->nb_antennas_tx; i++)
txp[i] = (void*)&eNB->common_vars.txdata[0][i][subframe*fp->samples_per_tti];
for (packet_id=0; packet_id < spsf / spp_eth; packet_id++) {
for (i=0; i < fp->nb_antennas_tx; i++)
txp[i] += packet_id*spp_eth;
eNB->ifdevice.trx_write_func(&eNB->ifdevice,
(proc_timestamp + packet_id*spp_eth),
txp,
spp_eth,
fp->nb_antennas_tx,
0);
}
} else if (packet_type == IF5_RRH_GW_UL) {
unsigned int spp_eth = eNB->ifdevice.openair0_cfg->samples_per_packet;
unsigned int spsf = eNB->ifdevice.openair0_cfg->samples_per_frame/10;
for (i=0; i < fp->nb_antennas_rx; i++)
rxp[i] = (void*)&eNB->common_vars.rxdata[0][i][subframe*fp->samples_per_tti];
for (packet_id=0; packet_id < spsf / spp_eth; packet_id++) {
for (i=0; i < fp->nb_antennas_rx; i++)
rxp[i] += packet_id*spp_eth;
eNB->ifdevice.trx_write_func(&eNB->ifdevice,
(proc_timestamp + packet_id*spp_eth),
rxp,
spp_eth,
fp->nb_antennas_rx,
0);
}
} else if (packet_type == IF5_MOBIPASS) {
uint16_t db_fulllength=640;
__m128i *data_block=NULL, *data_block_head=NULL;
__m128i *txp128;
__m128i t0, t1;
tx_buffer = memalign(16, MAC_HEADER_SIZE_BYTES + sizeof_IF5_mobipass_header_t + db_fulllength*sizeof(int16_t));
IF5_mobipass_header_t *header = (IF5_mobipass_header_t *)(tx_buffer + MAC_HEADER_SIZE_BYTES);
data_block_head = (__m128i *)(tx_buffer + MAC_HEADER_SIZE_BYTES + sizeof_IF5_mobipass_header_t + 4);
header->flags = 0;
header->fifo_status = 0;
header->seqno = *seqno;
header->ack = 0;
header->word0 = 0;
txp[0] = (void*)&eNB->common_vars.txdata[0][0][subframe*eNB->frame_parms.samples_per_tti];
txp128 = (__m128i *) txp[0];
for (packet_id=0; packet_id<(fp->samples_per_tti*2)/db_fulllength; packet_id++) {
header->time_stamp = proc_timestamp + packet_id*db_fulllength;
data_block = data_block_head;
for (i=0; i<db_fulllength>>3; i+=2) {
t0 = _mm_srli_epi16(*txp128++, 4);
t1 = _mm_srli_epi16(*txp128++, 4);
*data_block++ = _mm_packs_epi16(t0, t1);
}
// Write the packet to the fronthaul
if ((eNB->ifdevice.trx_write_func(&eNB->ifdevice,
packet_id,
&tx_buffer,
db_fulllength,
1,
IF5_MOBIPASS)) < 0) {
perror("ETHERNET write for IF5_MOBIPASS\n");
}
header->seqno += 1;
}
*seqno = header->seqno;
} else {
AssertFatal(1==0, "send_IF5 - Unknown packet_type %x", packet_type);
}
free(tx_buffer);
return;
}
void recv_IF5(PHY_VARS_eNB *eNB, openair0_timestamp *proc_timestamp, int subframe, uint16_t packet_type) {
LTE_DL_FRAME_PARMS *fp=&eNB->frame_parms;
void *txp[fp->nb_antennas_tx], *rxp[fp->nb_antennas_rx];
void *rx_buffer=NULL;
uint16_t packet_id=0, i=0;
if (packet_type == IF5_RRH_GW_DL) {
unsigned int spp_eth = eNB->ifdevice.openair0_cfg->samples_per_packet;
unsigned int spsf = eNB->ifdevice.openair0_cfg->samples_per_frame/10;
openair0_timestamp timestamp[spsf / spp_eth];
for (i=0; i < fp->nb_antennas_tx; i++)
txp[i] = (void*)&eNB->common_vars.txdata[0][i][subframe*fp->samples_per_tti];
for (packet_id=0; packet_id < spsf / spp_eth; packet_id++) {
for (i=0; i < fp->nb_antennas_tx; i++)
txp[i] += packet_id*spp_eth;
eNB->ifdevice.trx_read_func(&eNB->ifdevice,
&timestamp[packet_id],
txp,
spp_eth,
fp->nb_antennas_tx);
}
*proc_timestamp = timestamp[0];
} else if (packet_type == IF5_RRH_GW_UL) {
unsigned int spp_eth = eNB->ifdevice.openair0_cfg->samples_per_packet;
unsigned int spsf = eNB->ifdevice.openair0_cfg->samples_per_frame/10;
openair0_timestamp timestamp[spsf / spp_eth];
for (i=0; i < fp->nb_antennas_rx; i++)
rxp[i] = (void*)&eNB->common_vars.rxdata[0][i][subframe*fp->samples_per_tti];
for (packet_id=0; packet_id < spsf / spp_eth; packet_id++) {
for (i=0; i < fp->nb_antennas_tx; i++)
rxp[i] += packet_id*spp_eth;
eNB->ifdevice.trx_read_func(&eNB->ifdevice,
&timestamp[packet_id],
rxp,
spp_eth,
fp->nb_antennas_rx);
}
*proc_timestamp = timestamp[0];
} else if (packet_type == IF5_MOBIPASS) {
} else {
AssertFatal(1==0, "recv_IF5 - Unknown packet_type %x", packet_type);
}
free(rx_buffer);
return;
}
/*******************************************************************************
OpenAirInterface
Copyright(c) 1999 - 2014 Eurecom
OpenAirInterface 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 3 of the License, or
(at your option) any later version.
OpenAirInterface 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 OpenAirInterface.The full GNU General Public License is
included in this distribution in the file called "COPYING". If not,
see <http://www.gnu.org/licenses/>.
Contact Information
OpenAirInterface Admin: openair_admin@eurecom.fr
OpenAirInterface Tech : openair_tech@eurecom.fr
OpenAirInterface Dev : openair4g-devel@lists.eurecom.fr
Address : Eurecom, Campus SophiaTech, 450 Route des Chappes, CS 50193 - 06904 Biot Sophia Antipolis cedex, FRANCE
*******************************************************************************/
/*! \file PHY/LTE_TRANSPORT/if5_tools.h
* \brief
* \author S. Sandeep Kumar, Raymond Knopp
* \date 2016
* \version 0.1
* \company Eurecom
* \email: ee13b1025@iith.ac.in, knopp@eurecom.fr
* \note
* \warning
*/
#include <stdint.h>
#include "PHY/defs.h"
#define IF5_RRH_GW_DL 0x0022
#define IF5_RRH_GW_UL 0x0023
#define IF5_MOBIPASS 0xbffe
struct IF5_mobipass_header {
///
uint16_t flags;
///
uint16_t fifo_status;
///
uint8_t seqno;
///
uint8_t ack;
///
uint32_t word0;
///
uint32_t time_stamp;
} __attribute__ ((__packed__));
typedef struct IF5_mobipass_header IF5_mobipass_header_t;
#define sizeof_IF5_mobipass_header_t 14
void send_IF5(PHY_VARS_eNB*, openair0_timestamp, int, uint8_t*, uint16_t);
void recv_IF5(PHY_VARS_eNB*, openair0_timestamp*, int, uint16_t);
/**
* @companders.c - implementation
*
* @copy Copyright (C) <2012> <M. A. Chatterjee>
* @author M A Chatterjee <deftio [at] deftio [dot] com>
* @version 1.01 M. A. Chatterjee, cleaned up naming
*
* This file contains integer math compander functions for analog/audio representations on
* embedded systems. Linear2Alaw derived from Mark Spencer, Sun Microsystem and from
* the A Law specification
*
* @license:
* This software is provided 'as-is', without any express or implied
* warranty. In no event will the authors be held liable for any damages
* arising from the use of this software.
*
* Permission is granted to anyone to use this software for any purpose,
* including commercial applications, and to alter it and redistribute it
* freely, subject to the following restrictions:
*
* 1. The origin of this software must not be misrepresented; you must not
* claim that you wrote the original software. If you use this software
* in a product, an acknowledgment in the product documentation would be
* appreciated but is not required.
*
* 2. Altered source versions must be plainly marked as such, and must not be
* misrepresented as being the original software.
*
* 3. This notice may not be removed or altered from any source
* distribution.
*
*/
#include "companders.h"
DIO_s8 DIO_LinearToALaw(DIO_s16 sample)
{
const DIO_s16 cClip = 32635;
const static DIO_s8 LogTable[128] =
{
1,1,2,2,3,3,3,3,4,4,4,4,4,4,4,4,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,
6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,
7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,
7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7
};
DIO_s32 sign, exponent, mantissa;
DIO_s8 compandedValue;
sample = (sample ==-32768) ? -32767 : sample;
sign = ((~sample) >> 8) & 0x80;
if (!sign)
sample = (short)-sample;
if (sample > cClip)
sample = cClip;
if (sample >= 256)
{
exponent = (int)LogTable[(sample >> 8) & 0x7F];
mantissa = (sample >> (exponent + 3) ) & 0x0F;
compandedValue = ((exponent << 4) | mantissa);
}
else
{
compandedValue = (unsigned char)(sample >> 4);
}
compandedValue ^= (sign ^ 0x55);
return compandedValue;
}
DIO_s16 DIO_ALawToLinear(DIO_s8 aLawByte)
{
const static DIO_s16 ALawDecompTable[256]={
5504, 5248, 6016, 5760, 4480, 4224, 4992, 4736,
7552, 7296, 8064, 7808, 6528, 6272, 7040, 6784,
2752, 2624, 3008, 2880, 2240, 2112, 2496, 2368,
3776, 3648, 4032, 3904, 3264, 3136, 3520, 3392,
22016, 20992, 24064, 23040, 17920, 16896, 19968, 18944,
30208, 29184, 32256, 31232, 26112, 25088, 28160, 27136,
11008, 10496, 12032, 11520, 8960, 8448, 9984, 9472,
15104, 14592, 16128, 15616, 13056, 12544, 14080, 13568,
344, 328, 376, 360, 280, 264, 312, 296,
472, 456, 504, 488, 408, 392, 440, 424,
88, 72, 120, 104, 24, 8, 56, 40,
216, 200, 248, 232, 152, 136, 184, 168,
1376, 1312, 1504, 1440, 1120, 1056, 1248, 1184,
1888, 1824, 2016, 1952, 1632, 1568, 1760, 1696,
688, 656, 752, 720, 560, 528, 624, 592,
944, 912, 1008, 976, 816, 784, 880, 848,
-5504, -5248, -6016, -5760, -4480, -4224, -4992, -4736,
-7552, -7296, -8064, -7808, -6528, -6272, -7040, -6784,
-2752, -2624, -3008, -2880, -2240, -2112, -2496, -2368,
-3776, -3648, -4032, -3904, -3264, -3136, -3520, -3392,
-22016,-20992,-24064,-23040,-17920,-16896,-19968,-18944,
-30208,-29184,-32256,-31232,-26112,-25088,-28160,-27136,
-11008,-10496,-12032,-11520, -8960, -8448, -9984, -9472,
-15104,-14592,-16128,-15616,-13056,-12544,-14080,-13568,
-344, -328, -376, -360, -280, -264, -312, -296,
-472, -456, -504, -488, -408, -392, -440, -424,
-88, -72, -120, -104, -24, -8, -56, -40,
-216, -200, -248, -232, -152, -136, -184, -168,
-1376, -1312, -1504, -1440, -1120, -1056, -1248, -1184,
-1888, -1824, -2016, -1952, -1632, -1568, -1760, -1696,
-688, -656, -752, -720, -560, -528, -624, -592,
-944, -912, -1008, -976, -816, -784, -880, -848};
DIO_s16 addr = ((DIO_s16)aLawByte)+128; // done for compilers with poor expr type enforcement
return ALawDecompTable[addr];
}
// see companders.h
// fixed-radix IIR averager implementation supporting arbitrarily chosen windows
DIO_s32 DIO_IIRavgFR (DIO_s32 prevAvg, DIO_u16 windowLen, DIO_s16 newSample, DIO_u8 radix)
{
DIO_s32 iirAvg=0;
iirAvg = ((prevAvg * (windowLen-1)) + (DIO_I2FR(newSample,radix)))/windowLen;
return iirAvg;
}
// see companders.h
// fixed-radix IIR averager implementation using power-of-2 sized windows
// and only shift operations for cpu efficiency
DIO_s32 DIO_IIRavgPower2FR (DIO_s32 prevAvg, DIO_u8 windowLenInBits, DIO_s16 newSample, DIO_u8 radix)
{
DIO_s32 iirAvg=0;
iirAvg = (((prevAvg<<windowLenInBits)-prevAvg) + (DIO_I2FR(newSample,radix)))>>windowLenInBits;
return iirAvg;
}
#ifdef MAIN
int main(int argc, char* argv[])
{
return 0;
}
#endif
/**
* @companders.h - header definition file for embedded companding routines
*
* @copy Copyright (C) <2001-2012> <M. A. Chatterjee>
* @author M A Chatterjee <deftio [at] deftio [dot] com>
* @version 1.01 M. A. Chatterjee, cleaned up naming
*
* This file contains integer math settable fixed point radix math routines for
* use on systems in which floating point is not desired or unavailable.
*
* @license:
* This software is provided 'as-is', without any express or implied
* warranty. In no event will the authors be held liable for any damages
* arising from the use of this software.
*
* Permission is granted to anyone to use this software for any purpose,
* including commercial applications, and to alter it and redistribute it
* freely, subject to the following restrictions:
*
* 1. The origin of this software must not be misrepresented; you must not
* claim that you wrote the original software. If you use this software
* in a product, an acknowledgment in the product documentation would be
* appreciated but is not required.
*
* 2. Altered source versions must be plainly marked as such, and must not be
* misrepresented as being the original software.
*
* 3. This notice may not be removed or altered from any source
* distribution.
*
*/
#ifndef __DIO_Compand_h__
#define __DIO_Compand_h__
#ifdef __cplusplus
extern "C"
{
#endif
//"DIO" prefixes are to assist in prevent name collisions if global namespace is used.
//typedefs ... change for platform dependant register size
// u/s = unsigned/signed 8/16/32 = num of bits
// keywords "int" and "long" in C/C++ are platform dependant
typedef unsigned char DIO_u8 ;
typedef signed char DIO_s8 ;
typedef unsigned short DIO_u16 ;
typedef signed short DIO_s16 ;
typedef unsigned long DIO_u32 ;
typedef signed long DIO_s32 ;
// macros for converting from Fixed-Radix to integer, vice-versa
// r represents radix precision in bits, converts to/from integer w truncation
#define DIO_I2FR(x,r) ((x)<<(r))
#define DIO_FR2I(x,r) ((x)>>(r))
// convert FR to double, this is for debug only and WILL NOT compile under many embedded systems.
// use this in test harnesses. Since this is a macro if its not used it won't expand / link
#define DIO_FR2D(x,r) ((double)(((double)(x))/((double)(1<<(r)))))
//convert signed linear 16 bit sample to an 8 bit A-Law companded sample
DIO_s8 DIO_LinearToALaw(DIO_s16 sample);
//convert 8bit Alaw companded representation back to linear 16 bit
DIO_s16 DIO_ALawToLinear(DIO_s8 aLawByte);
//DC Offset correction for integer companders
//IIR: y_0=(y_1*(w-1)+x_0)/(w)
//where w is the window length
//below are fixed radix precision IIR averagers which allow runtime tradeoffs for windowLen & precision
//Note that (windowLen)*(1<<radix) must < 32767
//DIO_IIRavgPower2FR() allows any window length but uses a divide instruction.
//output is in radix number of bits
DIO_s32 DIO_IIRavgFR (DIO_s32 prevAvg, DIO_u16 windowLen, DIO_s16 newSample, DIO_u8 radix);
//DIO_IIRavgPower2FR() similar to above, but window length is specified as a number of bits
//which removes the need for a divide in the implementation
//outpit is in radix number of bits
DIO_s32 DIO_IIRavgPower2FR (DIO_s32 prevAvg, DIO_u8 windowLenInBits, DIO_s16 newSample, DIO_u8 radix);
#ifdef __cplusplus
}
#endif
#endif /* __DIO_Compand_h__ */
/**
* @file compandit.c - implementation test file for integer companding with
* compand/uncompand support & IIR correction
*
* @copy Copyright (C) <2012> <M. A. Chatterjee>
* @author M A Chatterjee <deftio [at] deftio [dot] com>
*
* This software is provided 'as-is', without any express or implied
* warranty. In no event will the authors be held liable for any damages
* arising from the use of this software.
*
* Permission is granted to anyone to use this software for any purpose,
* including commercial applications, and to alter it and redistribute it
* freely, subject to the following restrictions:
*
* 1. The origin of this software must not be misrepresented; you must not
* claim that you wrote the original software. If you use this software
* in a product, an acknowledgment in the product documentation would be
* appreciated but is not required.
*
* 2. Altered source versions must be plainly marked as such, and must not be
* misrepresented as being the original software.
*
* 3. This notice may not be removed or altered from any source
* distribution.
*
*/
#include <stdio.h>
#include <string.h>
#include "companders.h"
//===============================================
//main program for testing the functions
int main (int argc, char *argv[])
{
int ret_val = 0;
int i=0,j=0;
printf("\n============================================================\n");
printf("compandit library quikie program\n");
printf("M. A. Chatterjee (c) 2012\n\n");
printf("These routines were developed for use on embedded projects\n");
printf("for more info see the accompanying compand.txt\n");
printf("\n");
//uncomment to
//show how linear-->alaw-->linear-->alaw progression / quantization error works
/*
{
char alaw=0,alaw2;
short rev=0;
for (i= -32768; i <= 32767; i++)
{