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csdr.c
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/*
This software is part of libcsdr, a set of simple DSP routines for
Software Defined Radio.
Copyright (c) 2014, Andras Retzler <[email protected]>
All rights reserved.
Redistribution and use in source and binary forms, with or without
modification, are permitted provided that the following conditions are met:
* Redistributions of source code must retain the above copyright
notice, this list of conditions and the following disclaimer.
* Redistributions in binary form must reproduce the above copyright
notice, this list of conditions and the following disclaimer in the
documentation and/or other materials provided with the distribution.
* Neither the name of the copyright holder nor the
names of its contributors may be used to endorse or promote products
derived from this software without specific prior written permission.
THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
DISCLAIMED. IN NO EVENT SHALL ANDRAS RETZLER BE LIABLE FOR ANY
DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
(INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#define _POSIX_C_SOURCE 199309L
#define _BSD_SOURCE
#define _GNU_SOURCE
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <limits.h>
#include <sys/time.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>
#include <sys/ioctl.h>
#include <unistd.h>
#include <time.h>
#include <stdarg.h>
#include "libcsdr.h"
#include "libcsdr_gpl.h"
#include "ima_adpcm.h"
#include <sched.h>
#include <math.h>
char usage[]=
"csdr - a simple commandline tool for Software Defined Radio receiver DSP.\n\n"
"usage: \n\n"
" csdr function_name <function_param1> <function_param2> [optional_param] ...\n\n"
"list of functions:\n\n"
" convert_u8_f\n"
" convert_f_u8\n"
" convert_s8_f\n"
" convert_f_s8\n"
" convert_f_s16\n"
" convert_s16_f\n"
" realpart_cf\n"
" clipdetect_ff\n"
" limit_ff [max_amplitude]\n"
" gain_ff <gain>\n"
" clone\n"
" none\n"
" yes_f <to_repeat> [buf_times]\n"
" detect_nan_ff\n"
" floatdump_f\n"
" flowcontrol <data_rate> <reads_per_second> [prebuffer_sec] [thrust]\n"
" shift_math_cc <rate>\n"
" shift_math_cc --fifo <fifo_path>\n"
" shift_addition_cc <rate>\n"
" shift_addition_cc --fifo <fifo_path>\n"
" shift_addition_cc_test\n"
" shift_table_cc <rate> [table_size]\n"
" decimating_shift_addition_cc <rate> [decimation]\n"
" dcblock_ff\n"
" fastdcblock_ff\n"
" fmdemod_atan_cf\n"
" fmdemod_quadri_cf\n"
" fmdemod_quadri_novect_cf\n"
" deemphasis_wfm_ff <sample_rate> <tau>\n"
" deemphasis_nfm_ff <one_of_the_predefined_sample_rates>\n"
" amdemod_cf\n"
" amdemod_estimator_cf\n"
" fir_decimate_cc <decimation_factor> [transition_bw [window]]\n"
" firdes_lowpass_f <cutoff_rate> <length> [window [--octave]]\n"
" firdes_bandpass_c <low_cut> <high_cut> <length> [window [--octave]]\n"
" agc_ff [hang_time [reference [attack_rate [decay_rate [max_gain [attack_wait [filter_alpha]]]]]]]\n"
" fastagc_ff [block_size [reference]]\n"
" rational_resampler_ff <interpolation> <decimation> [transition_bw [window]]\n"
" fractional_decimator_ff <decimation_rate> [transition_bw [window]]\n"
" fft_cc <fft_size> <out_of_every_n_samples> [window [--octave] [--benchmark]]\n"
" logpower_cf [add_db]\n"
" fft_benchmark <fft_size> <fft_cycles> [--benchmark]\n"
" bandpass_fir_fft_cc <low_cut> <high_cut> <transition_bw> [window]\n"
" bandpass_fir_fft_cc --fifo <fifo_path> <transition_bw> [window]\n"
" encode_ima_adpcm_s16_u8\n"
" decode_ima_adpcm_u8_s16\n"
" compress_fft_adpcm_f_u8 <fft_size>\n"
" flowcontrol <data_rate> <reads_per_second>\n"
" through\n"
" dsb_fc [q_value]\n"
" convert_f_samperf <wait_for_this_sample> \n"
" fmmod_fc\n"
" fixed_amplitude_cc <new_amplitude>\n"
" monos2stereo_s16\n"
" setbuf <buffer_size>\n"
" fft_exchange_sides_ff <fft_size>\n"
" squelch_and_smeter_cc --fifo <squelch_fifo> --outfifo <smeter_fifo> <use_every_nth> <report_every_nth>\n"
" \n"
;
//change on 2015-08-29: we rather dynamically determine the bufsize
//#define BUFSIZE (1024)
//#define BIG_BUFSIZE (1024*16)
//should be multiple of 16! (size of double complex)
//also, keep in mind that shift_addition_cc works better the smaller this buffer is.
int env_csdr_fixed_bufsize = 1024;
int env_csdr_fixed_big_bufsize = 1024*16;
int env_csdr_dynamic_bufsize_on = 0;
int env_csdr_print_bufsizes = 0;
int bigbufs = 0;
//change on on 2015-08-29: we don't yield at all. fread() will do it if it blocks
#define YIELD_EVERY_N_TIMES 3
//#define TRY_YIELD if(++yield_counter%YIELD_EVERY_N_TIMES==0) sched_yield()
#define TRY_YIELD
//unsigned yield_counter=0;
int badsyntax(char* why)
{
if(why==0) fprintf(stderr, "%s", usage);
else fprintf(stderr, "csdr: %s\n\n", why);
return -1;
}
int clipdetect_ff(float* input, int input_size)
{
for(int i=0;i<input_size;i++)
{
if(input[i]<-1.0) { fprintf(stderr, "csdr clipdetect_ff: Signal value below -1.0!\n"); return -1; }
if(input[i]>1.0) { fprintf(stderr, "csdr clipdetect_ff: Signal value above 1.0!\n"); return 1; }
}
return 0;
}
int clone_(int bufsize_param)
{
unsigned char* clone_buffer;
clone_buffer = (unsigned char*)malloc(bufsize_param*sizeof(unsigned char));
for(;;)
{
fread(clone_buffer, sizeof(unsigned char), bufsize_param, stdin);
fwrite(clone_buffer, sizeof(unsigned char), bufsize_param, stdout);
TRY_YIELD;
}
}
#define FREAD_R fread (input_buffer, sizeof(float), the_bufsize, stdin)
#define FREAD_C fread (input_buffer, sizeof(float)*2, the_bufsize, stdin)
#define FWRITE_R fwrite (output_buffer, sizeof(float), the_bufsize, stdout)
#define FWRITE_C fwrite (output_buffer, sizeof(float)*2, the_bufsize, stdout)
#define FEOF_CHECK if(feof(stdin)) return 0
//#define BIG_FREAD_C fread(input_buffer, sizeof(float)*2, BIG_BUFSIZE, stdin)
//#define BIG_FWRITE_C fwrite(output_buffer, sizeof(float)*2, BIG_BUFSIZE, stdout)
int init_fifo(int argc, char *argv[])
{
if(argc>=4)
{
if(!strcmp(argv[2],"--fifo"))
{
fprintf(stderr,"csdr: fifo control mode on\n");
int fd = open(argv[3], O_RDONLY);
int flags = fcntl(fd, F_GETFL, 0);
fcntl(fd, F_SETFL, flags | O_NONBLOCK);
return fd;
}
}
return 0;
}
#define RFCTL_BUFSIZE 1024
int read_fifo_ctl(int fd, char* format, ...)
{
if(!fd) return 0;
static char buffer[RFCTL_BUFSIZE];
static int buffer_index=0;
int bytes_read=read(fd,buffer+buffer_index,(RFCTL_BUFSIZE-buffer_index)*sizeof(char));
if(bytes_read<=0) return 0;
int prev_newline_at=0;
int last_newline_at=0;
for(int i=0;i<buffer_index+bytes_read;i++)
{
if(buffer[i]=='\n')
{
prev_newline_at=last_newline_at;
last_newline_at=i+1;
}
}
if(last_newline_at)
{
//fprintf(stderr,"pna=%d lna=%d\n",prev_newline_at,last_newline_at);
va_list vl;
va_start(vl,format);
vsscanf(buffer+prev_newline_at,format,vl);
va_end(vl);
memmove(buffer,buffer+last_newline_at,buffer_index+bytes_read-last_newline_at);
buffer_index=bytes_read-last_newline_at;
return 1;
}
else
{
buffer_index+=bytes_read;
return 0;
}
}
#define SETBUF_PREAMBLE "csdr"
#define SETBUF_DEFAULT_BUFSIZE 1024
#define STRINGIFY_VALUE(x) STRINGIFY_NAME(x)
#define STRINGIFY_NAME(x) #x
int getbufsize()
{
if(!env_csdr_dynamic_bufsize_on) return (bigbufs) ? env_csdr_fixed_big_bufsize : env_csdr_fixed_bufsize;
int recv_first[2];
fread(recv_first, sizeof(int), 2, stdin);
if(memcmp(recv_first, SETBUF_PREAMBLE, sizeof(char)*4)!=0)
{ badsyntax("warning! Did not match preamble on the beginning of the stream. You should put \"csdr setbuf <buffer size>\" at the beginning of the chain! Falling back to default buffer size: " STRINGIFY_VALUE(SETBUF_DEFAULT_BUFSIZE)); return SETBUF_DEFAULT_BUFSIZE; }
if(recv_first[1]<=0) { badsyntax("warning! Invalid buffer size." ); return 0; }
return recv_first[1];
}
float* input_buffer;
unsigned char* buffer_u8;
float *output_buffer;
short *buffer_i16;
float *temp_f;
int the_bufsize = 0;
char **argv_global;
#define UNITROUND_UNIT 128
int unitround(int what)
{
if(what<=0) return UNITROUND_UNIT;
return ((what-1)&~(UNITROUND_UNIT-1))+UNITROUND_UNIT;
}
int initialize_buffers()
{
if(!(the_bufsize=getbufsize())) return 0;
the_bufsize=unitround(the_bufsize);
if(env_csdr_print_bufsizes) fprintf(stderr,"%s %s: buffer size set to %d\n",argv_global[0], argv_global[1], the_bufsize);
input_buffer = (float*) malloc(the_bufsize*sizeof(float) * 2); //need the 2× because we might also put complex floats into it
output_buffer = (float*) malloc(the_bufsize*sizeof(float) * 2);
buffer_u8 = (unsigned char*)malloc(the_bufsize*sizeof(unsigned char));
buffer_i16 = (short*) malloc(the_bufsize*sizeof(short));
temp_f = (float*) malloc(the_bufsize*sizeof(float) * 4);
return the_bufsize;
}
int sendbufsize(int size)
{
//The first word is a preamble, "csdr".
//If the next csdr process detects it, sets the buffer size according to the second word
if(!env_csdr_dynamic_bufsize_on) return env_csdr_fixed_bufsize;
if(env_csdr_print_bufsizes) fprintf(stderr,"%s %s: next process proposed input buffer size is %d\n",argv_global[0], argv_global[1], size);
int send_first[2];
memcpy((char*)send_first, SETBUF_PREAMBLE, 4*sizeof(char));
send_first[1] = size;
fwrite(send_first, sizeof(int), 2, stdout);
return size;
}
int parse_env()
{
char* envtmp;
envtmp=getenv("CSDR_DYNAMIC_BUFSIZE_ON");
//fprintf(stderr, "envtmp: %s\n",envtmp);
if(envtmp)
{
env_csdr_dynamic_bufsize_on = !!atoi(envtmp);
env_csdr_fixed_bufsize = 0;
}
else
{
envtmp=getenv("CSDR_FIXED_BUFSIZE");
if(envtmp)
{
env_csdr_fixed_big_bufsize = env_csdr_fixed_bufsize = atoi(envtmp);
}
}
envtmp=getenv("CSDR_PRINT_BUFSIZES");
if(envtmp)
{
env_csdr_print_bufsizes = atoi(envtmp);
}
}
int main(int argc, char *argv[])
{
parse_env();
argv_global=argv;
if(argc<=1) return badsyntax(0);
if(!strcmp(argv[1],"--help")) return badsyntax(0);
fcntl(STDIN_FILENO, F_SETPIPE_SZ, 65536*32);
fcntl(STDOUT_FILENO, F_SETPIPE_SZ, 65536*32);
//fprintf(stderr, "csdr: F_SETPIPE_SZ\n");
if(!strcmp(argv[1],"setbuf"))
{
if(argc<=2) return badsyntax("need required parameter (buffer size)");
sscanf(argv[2],"%d",&the_bufsize);
if(the_bufsize<=0) return badsyntax("buffer size <= 0 is invalid");
sendbufsize(the_bufsize);
clone_(the_bufsize); //After sending the buffer size out, just copy stdin to stdout
}
if(!strcmp(argv[1],"clone"))
{
if(!sendbufsize(initialize_buffers())) return -2;
clone_(the_bufsize);
}
if(!strcmp(argv[1],"convert_u8_f"))
{
if(!sendbufsize(initialize_buffers())) return -2;
for(;;)
{
FEOF_CHECK;
fread(buffer_u8, sizeof(unsigned char), the_bufsize, stdin);
convert_u8_f(buffer_u8, output_buffer, the_bufsize);
FWRITE_R;
TRY_YIELD;
}
}
if(!strcmp(argv[1],"convert_f_u8")) //not tested
{
if(!sendbufsize(initialize_buffers())) return -2;
for(;;)
{
FEOF_CHECK;
FREAD_R;
convert_f_u8(input_buffer, buffer_u8, the_bufsize);
fwrite(buffer_u8, sizeof(unsigned char), the_bufsize, stdout);
TRY_YIELD;
}
}
if(!strcmp(argv[1],"convert_s8_f"))
{
if(!sendbufsize(initialize_buffers())) return -2;
for(;;)
{
FEOF_CHECK;
fread((signed char*)buffer_u8, sizeof(signed char), the_bufsize, stdin);
convert_s8_f((signed char*)buffer_u8, output_buffer, the_bufsize);
FWRITE_R;
TRY_YIELD;
}
}
if(!strcmp(argv[1],"convert_f_s8")) //not tested
{
if(!sendbufsize(initialize_buffers())) return -2;
for(;;)
{
FEOF_CHECK;
FREAD_R;
convert_f_s8(input_buffer, (signed char*)buffer_u8, the_bufsize);
fwrite((signed char*)buffer_u8, sizeof(signed char), the_bufsize, stdout);
TRY_YIELD;
}
}
if((!strcmp(argv[1],"convert_f_i16")) || (!strcmp(argv[1],"convert_f_s16")))
{
if(!sendbufsize(initialize_buffers())) return -2;
for(;;)
{
FEOF_CHECK;
FREAD_R;
convert_f_i16(input_buffer, buffer_i16, the_bufsize);
fwrite(buffer_i16, sizeof(short), the_bufsize, stdout);
TRY_YIELD;
}
}
if((!strcmp(argv[1],"convert_i16_f")) || (!strcmp(argv[1],"convert_s16_f"))) //not tested
{
if(!sendbufsize(initialize_buffers())) return -2;
for(;;)
{
FEOF_CHECK;
fread(buffer_i16, sizeof(short), the_bufsize, stdin);
convert_i16_f(buffer_i16, output_buffer, the_bufsize);
FWRITE_R;
TRY_YIELD;
}
}
if(!strcmp(argv[1],"realpart_cf"))
{
if(!sendbufsize(initialize_buffers())) return -2;
for(;;)
{
FEOF_CHECK;
FREAD_C;
for(int i=0;i<the_bufsize;i++) output_buffer[i]=iof(input_buffer,i);
FWRITE_R;
TRY_YIELD;
}
}
if(!strcmp(argv[1],"clipdetect_ff"))
{
if(!sendbufsize(initialize_buffers())) return -2;
for(;;)
{
FEOF_CHECK;
FREAD_R;
clipdetect_ff(input_buffer, the_bufsize);
fwrite(input_buffer, sizeof(float), the_bufsize, stdout);
TRY_YIELD;
}
}
if(!strcmp(argv[1],"gain_ff"))
{
if(argc<=2) return badsyntax("need required parameter (gain)");
float gain;
sscanf(argv[2],"%g",&gain);
if(!sendbufsize(initialize_buffers())) return -2;
for(;;)
{
FEOF_CHECK;
FREAD_R;
gain_ff(input_buffer, output_buffer, the_bufsize, gain);
FWRITE_R;
TRY_YIELD;
}
}
if(!strcmp(argv[1],"limit_ff"))
{
float max_amplitude=1.0;
if(argc>=3) sscanf(argv[2],"%g",&max_amplitude);
if(!sendbufsize(initialize_buffers())) return -2;
for(;;)
{
FEOF_CHECK;
FREAD_R;
limit_ff(input_buffer, output_buffer, the_bufsize, max_amplitude);
FWRITE_R;
TRY_YIELD;
}
}
if(!strcmp(argv[1],"yes_f"))
{
if(argc<=2) return badsyntax("need required parameter (to_repeat)");
float to_repeat;
sscanf(argv[2],"%g",&to_repeat);
int buf_times = 0;
if(argc>=4) sscanf(argv[3],"%d",&buf_times);
if(!sendbufsize(initialize_buffers())) return -2;
for(int i=0;i<the_bufsize;i++) output_buffer[i]=to_repeat;
for(int i=0;(!buf_times)||i<buf_times;i++)
{
fwrite(output_buffer, sizeof(float), the_bufsize, stdout);
TRY_YIELD;
}
return 0;
}
if(!strcmp(argv[1],"shift_math_cc"))
{
if(argc<=2) return badsyntax("need required parameter (rate)");
float starting_phase=0;
float rate;
sscanf(argv[2],"%g",&rate);
if(!sendbufsize(initialize_buffers())) return -2;
for(;;)
{
FEOF_CHECK;
if(!FREAD_C) break;
FWRITE_C;
TRY_YIELD;
}
return 0;
}
//speed tests:
//csdr yes_f 1 1000000 | time csdr shift_math_cc 0.2 >/dev/null
//csdr yes_f 1 1000000 | time csdr shift_addition_cc 0.2 >/dev/null
//csdr yes_f 1 1000000 | time csdr shift_table_cc 0.2 >/dev/null
if(!strcmp(argv[1],"shift_table_cc"))
{
bigbufs=1;
if(argc<=2) return badsyntax("need required parameter (rate)");
float starting_phase=0;
float rate;
int table_size=65536;
sscanf(argv[2],"%g",&rate);
if(argc>3) sscanf(argv[3],"%d",&table_size);
if(!sendbufsize(initialize_buffers())) return -2;
shift_table_data_t table_data=shift_table_init(table_size);
fprintf(stderr,"shift_table_cc: LUT initialized\n");
for(;;)
{
FEOF_CHECK;
if(!FREAD_C) break;
starting_phase=shift_table_cc((complexf*)input_buffer, (complexf*)output_buffer, the_bufsize, rate, table_data, starting_phase);
FWRITE_C;
TRY_YIELD;
}
return 0;
}
#ifdef LIBCSDR_GPL
if(!strcmp(argv[1],"decimating_shift_addition_cc"))
{
bigbufs=1;
if(argc<=2) return badsyntax("need required parameter (rate)");
float starting_phase=0;
float rate;
int decimation=1;
sscanf(argv[2],"%g",&rate);
if(argc>3) sscanf(argv[3],"%d",&decimation);
if(!initialize_buffers()) return -2;
sendbufsize(the_bufsize/decimation);
shift_addition_data_t d=decimating_shift_addition_init(rate, decimation);
decimating_shift_addition_status_t s;
s.decimation_remain=0;
s.starting_phase=0;
for(;;)
{
FEOF_CHECK;
if(!FREAD_C) break;
s=decimating_shift_addition_cc((complexf*)input_buffer, (complexf*)output_buffer, the_bufsize, d, decimation, s);
fwrite(output_buffer, sizeof(float)*2, s.output_size, stdout);
TRY_YIELD;
}
return 0;
}
if(!strcmp(argv[1],"shift_addition_cc"))
{
bigbufs=1;
float starting_phase=0;
float rate;
int fd;
if(fd=init_fifo(argc,argv))
{
while(!read_fifo_ctl(fd,"%g\n",&rate)) usleep(10000);
}
else
{
if(argc<=2) return badsyntax("need required parameter (rate)");
sscanf(argv[2],"%g",&rate);
}
if(!sendbufsize(initialize_buffers())) return -2;
for(;;)
{
shift_addition_data_t data=shift_addition_init(rate);
fprintf(stderr,"shift_addition_cc: reinitialized to %g\n",rate);
int remain, current_size;
float* ibufptr;
float* obufptr;
for(;;)
{
FEOF_CHECK;
if(!FREAD_C) break;
remain=the_bufsize;
ibufptr=input_buffer;
obufptr=output_buffer;
while(remain)
{
current_size=(remain>1024)?1024:remain;
starting_phase=shift_addition_cc((complexf*)ibufptr, (complexf*)obufptr, current_size, data, starting_phase);
ibufptr+=current_size*2;
obufptr+=current_size*2;
remain-=current_size;
}
FWRITE_C;
if(read_fifo_ctl(fd,"%g\n",&rate)) break;
TRY_YIELD;
}
}
return 0;
}
if(!strcmp(argv[1],"shift_addition_cc_test"))
{
if(argc<=2) return badsyntax("need required parameter (rate)");
float rate;
sscanf(argv[2],"%g",&rate);
//if(initialize_buffers()) return -2; //most likely we don't need this here
shift_addition_data_t data=shift_addition_init(rate);
shift_addition_cc_test(data);
return 0;
}
#endif
if(!strcmp(argv[1],"dcblock_ff"))
{
static dcblock_preserve_t dcp; //will be 0 as .bss is set to 0
if(!sendbufsize(initialize_buffers())) return -2;
for(;;)
{
FEOF_CHECK;
FREAD_R;
dcp=dcblock_ff(input_buffer, output_buffer, the_bufsize, 0, dcp);
FWRITE_R;
TRY_YIELD;
}
}
if(!strcmp(argv[1],"fastdcblock_ff"))
{
int dcblock_bufsize=SETBUF_DEFAULT_BUFSIZE;
if(argc>=3) sscanf(argv[2],"%d",&dcblock_bufsize);
float* dcblock_buffer=(float*)malloc(sizeof(float)*dcblock_bufsize);
static float last_dc_level=0.0;
getbufsize(); //it is just dummy
sendbufsize(dcblock_bufsize);
for(;;)
{
FEOF_CHECK;
fread(dcblock_buffer, sizeof(float), dcblock_bufsize, stdin);
last_dc_level=fastdcblock_ff(dcblock_buffer, dcblock_buffer, dcblock_bufsize, last_dc_level);
fwrite(dcblock_buffer, sizeof(float), dcblock_bufsize, stdout);
TRY_YIELD;
}
}
if(!strcmp(argv[1],"fmdemod_atan_cf"))
{
if(!sendbufsize(initialize_buffers())) return -2;
float last_phase=0;
for(;;)
{
FEOF_CHECK;
FREAD_C;
if(feof(stdin)) return 0;
last_phase=fmdemod_atan_cf((complexf*)input_buffer, output_buffer, the_bufsize, last_phase);
FWRITE_R;
TRY_YIELD;
}
}
if(!strcmp(argv[1],"fmdemod_quadri_cf"))
{
if(!sendbufsize(initialize_buffers())) return -2;
complexf last_sample;
last_sample.i=0.;
last_sample.q=0.;
for(;;)
{
FEOF_CHECK;
FREAD_C;
last_sample=fmdemod_quadri_cf((complexf*)input_buffer, output_buffer, the_bufsize, temp_f, last_sample);
FWRITE_R;
TRY_YIELD;
}
}
if(!strcmp(argv[1],"fmdemod_quadri_novect_cf"))
{
if(!sendbufsize(initialize_buffers())) return -2;
complexf last_sample;
last_sample.i=0.;
last_sample.q=0.;
for(;;)
{
FEOF_CHECK;
FREAD_C;
last_sample=fmdemod_quadri_novect_cf((complexf*)input_buffer, output_buffer, the_bufsize, last_sample);
FWRITE_R;
TRY_YIELD;
}
}
if(!strcmp(argv[1],"deemphasis_wfm_ff"))
{
if(argc<=3) return badsyntax("need required parameters (sample rate, tau)");
if(!sendbufsize(initialize_buffers())) return -2;
int sample_rate;
sscanf(argv[2],"%d",&sample_rate);
float tau;
sscanf(argv[3],"%g",&tau);
fprintf(stderr,"deemphasis_wfm_ff: tau = %g, sample_rate = %d\n",tau,sample_rate);
float last_output=0;
for(;;)
{
FEOF_CHECK;
FREAD_R;
last_output=deemphasis_wfm_ff(input_buffer, output_buffer, the_bufsize, tau, sample_rate, last_output);
FWRITE_R;
TRY_YIELD;
}
}
if(!strcmp(argv[1],"detect_nan_ff"))
{
if(!sendbufsize(initialize_buffers())) return -2;
for(;;)
{
FEOF_CHECK;
FREAD_R;
int nan_detect=0;
for(int i=0; i<the_bufsize;i++)
{
if(is_nan(input_buffer[i]))
{
nan_detect=1;
break;
}
}
if(nan_detect) fprintf(stderr, "detect_nan_f: NaN detected!\n");
fwrite(input_buffer, sizeof(float), the_bufsize, stdout);
TRY_YIELD;
}
}
if(!strcmp(argv[1],"floatdump_f"))
{
if(!sendbufsize(initialize_buffers())) return -2;
for(;;)
{
FEOF_CHECK;
FREAD_R;
for(int i=0; i<the_bufsize;i++) fprintf(stderr, "%g ",input_buffer[i]);
TRY_YIELD;
}
}
if(!strcmp(argv[1],"deemphasis_nfm_ff"))
{
if(argc<=2) return badsyntax("need required parameter (sample rate)");
int sample_rate;
sscanf(argv[2],"%d",&sample_rate);
if(!sendbufsize(initialize_buffers())) return -2; //maybe we should take a /2 of bufsize over here
int processed=0;
for(;;)
{
FEOF_CHECK;
fread(input_buffer+the_bufsize-processed, sizeof(float), processed, stdin);
processed=deemphasis_nfm_ff(input_buffer, output_buffer, the_bufsize, sample_rate);
if(!processed) return badsyntax("deemphasis_nfm_ff: invalid sample rate (this function works only with specific sample rates).");
memmove(input_buffer,input_buffer+processed,(the_bufsize-processed)*sizeof(float)); //memmove lets the source and destination overlap
fwrite(output_buffer, sizeof(float), processed, stdout);
TRY_YIELD;
}
}
if(!strcmp(argv[1],"amdemod_cf"))
{
if(!sendbufsize(initialize_buffers())) return -2;
for(;;)
{
FEOF_CHECK;
FREAD_C;
amdemod_cf((complexf*)input_buffer, output_buffer, the_bufsize);
FWRITE_R;
TRY_YIELD;
}
}
if(!strcmp(argv[1],"amdemod_estimator_cf"))
{
if(!sendbufsize(initialize_buffers())) return -2;
for(;;)
{
FEOF_CHECK;
FREAD_C;
amdemod_estimator_cf((complexf*)input_buffer, output_buffer, the_bufsize, 0., 0.);
FWRITE_R;
TRY_YIELD;
}
}
if(!strcmp(argv[1],"fir_decimate_cc"))
{
bigbufs=1;
if(argc<=2) return badsyntax("need required parameter (decimation factor)");
int factor;
sscanf(argv[2],"%d",&factor);
float transition_bw = 0.05;
if(argc>=4) sscanf(argv[3],"%g",&transition_bw);
window_t window = WINDOW_DEFAULT;
if(argc>=5)
{
window=firdes_get_window_from_string(argv[4]);
}
else fprintf(stderr,"fir_decimate_cc: window = %s\n",firdes_get_string_from_window(window));
int taps_length=firdes_filter_len(transition_bw);
fprintf(stderr,"fir_decimate_cc: taps_length = %d\n",taps_length);
while (env_csdr_fixed_big_bufsize < taps_length*2) env_csdr_fixed_big_bufsize*=2; //temporary fix for buffer size if [transition_bw] is low
//fprintf(stderr, "env_csdr_fixed_big_bufsize = %d\n", env_csdr_fixed_big_bufsize);
if(!initialize_buffers()) return -2;
sendbufsize(the_bufsize/factor);
int padded_taps_length = taps_length;
float *taps;
#define NEON_ALIGNMENT (4*4*2)
#ifdef NEON_OPTS
fprintf(stderr,"taps_length = %d\n", taps_length);
padded_taps_length = taps_length+(NEON_ALIGNMENT/4)-1 - ((taps_length+(NEON_ALIGNMENT/4)-1)%(NEON_ALIGNMENT/4));
fprintf(stderr,"padded_taps_length = %d\n", padded_taps_length);
taps = (float*) (float*)malloc(padded_taps_length+NEON_ALIGNMENT);
fprintf(stderr,"taps = %x\n", taps);
taps = (float*)((((unsigned)taps)+NEON_ALIGNMENT-1) & ~(NEON_ALIGNMENT-1));
fprintf(stderr,"taps = %x\n", taps);
for(int i=0;i<padded_taps_length-taps_length;i++) taps[taps_length+i]=0;
#else
taps=(float*)malloc(taps_length*sizeof(float));
#endif
firdes_lowpass_f(taps,taps_length,0.5/(float)factor,window);
int input_skip=0;
int output_size=0;
FREAD_C;
for(;;)
{
FEOF_CHECK;
output_size=fir_decimate_cc((complexf*)input_buffer, (complexf*)output_buffer, the_bufsize, factor, taps, padded_taps_length);
//fprintf(stderr, "os %d\n",output_size);
fwrite(output_buffer, sizeof(complexf), output_size, stdout);
fflush(stdout);
TRY_YIELD;
input_skip=factor*output_size;
memmove((complexf*)input_buffer,((complexf*)input_buffer)+input_skip,(the_bufsize-input_skip)*sizeof(complexf)); //memmove lets the source and destination overlap
fread(((complexf*)input_buffer)+(the_bufsize-input_skip), sizeof(complexf), input_skip, stdin);
//fprintf(stderr,"iskip=%d output_size=%d start=%x target=%x skipcount=%x \n",input_skip,output_size,input_buffer, ((complexf*)input_buffer)+(BIG_BUFSIZE-input_skip),(BIG_BUFSIZE-input_skip));
}
}
/*if(!strcmp(argv[1],"ejw_test"))
{
printf("ejqd=[");
complexf ejw;
float phase=0;
for(int i=0;i<63;i++)
{
e_powj(&ejw,phase);
phase+=PI*0.3;
printf("%g+(%g)*i ",iof(&ejw,0),qof(&ejw,0));
}
printf("];");
return 0;
}*/
if(!strcmp(argv[1],"firdes_lowpass_f"))
{
//Process the params
if(argc<=3) return badsyntax("need required parameters (cutoff_rate, length)");
float cutoff_rate;
sscanf(argv[2],"%g",&cutoff_rate);
int length;
sscanf(argv[3],"%d",&length);
if(length%2==0) return badsyntax("number of symmetric FIR filter taps should be odd");
window_t window = WINDOW_DEFAULT;
if(argc>=5)
{
window=firdes_get_window_from_string(argv[4]);
}
else fprintf(stderr,"firdes_lowpass_f: window = %s\n",firdes_get_string_from_window(window));
int octave=(argc>=6 && !strcmp("--octave",argv[5]));
float* taps=(float*)malloc(sizeof(float)*length);
//Make the filter
firdes_lowpass_f(taps,length,cutoff_rate,window);
//Do the output
if(octave) printf("taps=[");
for(int i=0;i<length;i++) printf("%g ",taps[i]);
if(octave) printf("];plot(taps);figure(2);freqz(taps);\n");
//Wait forever, so that octave won't close just after popping up the window.
//You can close it with ^C.
if(octave) { fflush(stdout); getchar(); }
return 0;
}
if(!strcmp(argv[1],"firdes_bandpass_c"))
{
//Process the params
if(argc<=4) return badsyntax("need required parameters (low_cut, high_cut, length)");
float low_cut;
sscanf(argv[2],"%g",&low_cut);
float high_cut;
sscanf(argv[3],"%g",&high_cut);
int length;
sscanf(argv[4],"%d",&length);
if(length%2==0) return badsyntax("number of symmetric FIR filter taps should be odd");
window_t window = WINDOW_DEFAULT;
if(argc>=6)
{
window=firdes_get_window_from_string(argv[5]);
}
else fprintf(stderr,"firdes_bandpass_c: window = %s\n",firdes_get_string_from_window(window));
int octave=(argc>=7 && !strcmp("--octave",argv[6]));
complexf* taps=(complexf*)malloc(sizeof(complexf)*length);
//Make the filter
firdes_bandpass_c(taps, length, low_cut, high_cut, window);
//Do the output
if(octave) printf("taps=[");
for(int i=0;i<length;i++) printf("(%g)+(%g)*i ",iof(taps,i),qof(taps,i));
int fft_length=1024;
while(fft_length<length) fft_length*=2;
//if(octave) printf("];\n");
if(octave) printf(
"];figure(\"Position\",[0 0 1000 1000]);fser=fft([taps,zeros(1,%d)]);ampl=abs(fser).^2;halfindex=floor(1+size(ampl)(2)/2);\n"
"amplrev=[ampl(halfindex:end),ampl(1:halfindex)];\n" //we have to swap the output of FFT
"subplot(2,1,1);plot(amplrev);\n"
"subplot(2,1,2);plot(arg(fser));\n"
"#figure(2);freqz(taps);\n"
"#figur(3);plot3(taps);\n",fft_length-length);
//Wait forever, so that octave won't close just after popping up the window.
//You can close it with ^C.
if(octave) { fflush(stdout); getchar(); }
return 0;
}
#ifdef LIBCSDR_GPL
if(!strcmp(argv[1],"agc_ff"))
{
//Process the params
//Explanation of what these actually do is in the DSP source.
//These good default values are for SSB sampled at 48000 kHz.
short hang_time=200;
if(argc>=3) sscanf(argv[2],"%hd",&hang_time);
float reference=0.2;
if(argc>=4) sscanf(argv[3],"%g",&reference);
float attack_rate=0.01;
if(argc>=5) sscanf(argv[4],"%g",&attack_rate);
float decay_rate=0.0001;
if(argc>=6) sscanf(argv[5],"%g",&decay_rate);
float max_gain=65536;
if(argc>=7) sscanf(argv[6],"%g",&max_gain);
short attack_wait=0;
if(argc>=8) sscanf(argv[7],"%hd",&attack_wait);
float filter_alpha=0.999;//0.001;
if(argc>=9) sscanf(argv[8],"%g",&filter_alpha);
if(!sendbufsize(initialize_buffers())) return -2;
float last_gain=1.0;
for(;;)
{
FEOF_CHECK;
FREAD_R;
last_gain=agc_ff(input_buffer, output_buffer, the_bufsize, reference, attack_rate, decay_rate, max_gain, hang_time, attack_wait, filter_alpha, last_gain);
FWRITE_R;
TRY_YIELD;
}
}
#endif
if(!strcmp(argv[1],"fastagc_ff"))
{
static fastagc_ff_t input; //is in .bss and gets cleared to zero before main()
input.input_size=1024;
if(argc>=3) sscanf(argv[2],"%d",&input.input_size);
getbufsize(); //dummy
sendbufsize(input.input_size);