Working black & white TV transmitter (PAL-L / SECAM timings and polarity by default - No Audio).
This commit is contained in:
Jean-François DEL NERO
parent
fafd7fa578
commit
03193173f3
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@ -24,14 +24,17 @@ endif
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ifeq ($(findstring CYGWIN,$(shell uname)),CYGWIN)
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endif
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EXEC=broadcast_fm rf_jammer
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EXEC=broadcast_tv broadcast_fm rf_jammer
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all: $(EXEC)
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broadcast_fm: broadcast_fm.o rds.o rds_stream_dump.o wave.o modulator.o FIR_Audio_Filter_Filter.o FM_Baseband_Filter.o AudioPreemphasis_Filter.o FIR_RDS_Passband_Filter.o hxcmod.o rand_gen.o
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$(CC) -o $@ $^ $(LDFLAGS)
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rf_jammer: rf_jammer.o wave.o modulator.o rand_gen.o
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broadcast_tv: broadcast_tv.o composite.o wave.o modulator.o bmp_file.o
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$(CC) -o $@ $^ $(LDFLAGS)
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rf_jammer: rf_jammer.o wave.o modulator.o rand_gen.o composite.o
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$(CC) -o $@ $^ $(LDFLAGS)
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broadcast_fm.o: ../src/broadcast_fm/broadcast_fm.c
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@ -70,9 +73,18 @@ AudioPreemphasis_Filter.o: ../src/broadcast_fm/fir_filters/AudioPreemphasis_Filt
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hxcmod.o: ../src/common/hxcmod/hxcmod.c
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$(CC) -o $@ -c $< $(CFLAGS)
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bmp_file.o: ../src/common/bmp_file.c
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$(CC) -o $@ -c $< $(CFLAGS)
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rand_gen.o: ../src/common/rand_gen.c
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$(CC) -o $@ -c $< $(CFLAGS)
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composite.o: ../src/broadcast_tv/composite.c
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$(CC) -o $@ -c $< $(CFLAGS)
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broadcast_tv.o: ../src/broadcast_tv/broadcast_tv.c
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$(CC) -o $@ -c $< $(CFLAGS)
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clean:
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rm -rf *.o
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rm -rf *.so
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@ -0,0 +1,255 @@
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///////////////////////////////////////////////////////////////////////////////////
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//-------------------------------------------------------------------------------//
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//-------------------------------------------------------------------------------//
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//-----------H----H--X----X-----CCCCC----22222----0000-----0000------11----------//
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//----------H----H----X-X-----C--------------2---0----0---0----0--1--1-----------//
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//---------HHHHHH-----X------C----------22222---0----0---0----0-----1------------//
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//--------H----H----X--X----C----------2-------0----0---0----0-----1-------------//
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//-------H----H---X-----X---CCCCC-----222222----0000-----0000----1111------------//
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//-------------------------------------------------------------------------------//
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//----------------------------------------------------- http://hxc2001.free.fr --//
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///////////////////////////////////////////////////////////////////////////////////
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// File : broadcast_tv.c
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// Contains: a broadcast TV modulator
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//
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// This file is part of rf-tools.
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//
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// Written by: Jean-François DEL NERO
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//
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// Copyright (C) 2023 Jean-François DEL NERO
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//
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// You are free to do what you want with this code.
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// A credit is always appreciated if you use it into your product :)
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//
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// Change History (most recent first):
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///////////////////////////////////////////////////////////////////////////////////
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//
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// Disclaimer / Legal warning : Radio spectrum and the law
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//
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// In most countries the use of any radio transmitting device is required to be
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// either licensed or specifically exempted from licensing under the local regulator.
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// Other than as used in accordance with a licence (or exemption),
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// the use of radio equipment is illegal.
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//
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// So take care to limit the emitting range and power when testing this software !
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//
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// --------------------------------------------------------------------------------
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#include <errno.h>
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#include <stdio.h>
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#include <string.h>
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#include <stdlib.h>
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#include <stdarg.h>
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#include <sys/types.h>
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#include <sys/stat.h>
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#include <fcntl.h>
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#include <time.h>
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#include <stdint.h>
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#include "wave.h"
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#include "modulator.h"
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#include "utils.h"
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#include "composite.h"
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#include "bmp_file.h"
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#define IQ_SAMPLE_RATE 16000000
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#define IF_FREQ 0
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#define BUFFER_SAMPLES_SIZE (1024*8)
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#define printf(fmt...) do { \
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if(!stdoutmode) \
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fprintf(stdout, fmt); \
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} while (0)
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int stdoutmode;
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int isOption(int argc, char* argv[],char * paramtosearch,char * argtoparam)
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{
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int param=1;
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int i,j;
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char option[512];
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memset(option,0,512);
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while(param<=argc)
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{
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if(argv[param])
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{
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if(argv[param][0]=='-')
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{
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memset(option,0,512);
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j=0;
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i=1;
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while( argv[param][i] && argv[param][i]!=':')
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{
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option[j]=argv[param][i];
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i++;
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j++;
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}
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if( !strcmp(option,paramtosearch) )
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{
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if(argtoparam)
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{
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if(argv[param][i]==':')
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{
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i++;
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j=0;
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while( argv[param][i] )
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{
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argtoparam[j]=argv[param][i];
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i++;
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j++;
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}
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argtoparam[j]=0;
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return 1;
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}
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else
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{
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return -1;
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}
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}
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else
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{
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return 1;
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}
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}
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}
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}
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param++;
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}
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return 0;
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}
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void printhelp(char* argv[])
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{
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printf("Options:\n");
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printf(" -stdout \t\t\t: IQ stream send to stdout\n");
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printf(" -bmp_file:[BMPFILE.BMP]\t: BMP image file to display\n");
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printf(" -generate \t\t\t: Generate the video IQ stream\n");
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printf(" -help \t\t\t: This help\n\n");
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printf("Example : 525MHz TV broadcasting with an hackrf (currently B&W with PAL-L/SECAM timings and polarity)\n./broadcast_tv -generate -stdout -bmp_file:Philips_PM5544.bmp | hackrf_transfer -f 525000000 -t - -x 47 -a 1 -s 16000000\n");
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printf("\n");
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}
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int main(int argc, char* argv[])
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{
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unsigned int i,j;
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int ret;
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char filename[512];
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wave_io * wave1,*wave2;
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double video_buf[BUFFER_SAMPLES_SIZE];
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composite_state vid_stat;
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int16_t subcarriers_dbg_wave_buf[BUFFER_SAMPLES_SIZE];
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uint16_t iq_wave_buf[ BUFFER_SAMPLES_SIZE];
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iq_wave_gen iqgen;
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bitmap_data bmp_data;
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stdoutmode = 0;
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if(isOption(argc,argv,"stdout",NULL)>0)
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{
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stdoutmode = 1;
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}
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if(!stdoutmode)
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{
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printf("broadcast_tv v0.0.1.1\n");
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printf("Copyright (C) 2023 Jean-Francois DEL NERO\n");
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printf("This program comes with ABSOLUTELY NO WARRANTY\n");
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printf("This is free software, and you are welcome to redistribute it\n");
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printf("under certain conditions;\n\n");
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}
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// help option...
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if(isOption(argc,argv,"help",0)>0)
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{
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printhelp(argv);
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}
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memset(filename,0,sizeof(filename));
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if(isOption(argc,argv,"bmp_file",(char*)&filename)>0)
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{
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printf("Input file : %s\n",filename);
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}
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memset(&bmp_data,0,sizeof(bmp_data));
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if(strlen(filename))
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{
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ret = bmp_load(filename,&bmp_data);
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if( ret >= 0)
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{
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printf("BMP file loaded successfully\n");
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}
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else
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{
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printf("BMP load error %d\n",ret);
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}
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}
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if(isOption(argc,argv,"generate",0)>0)
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{
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// IQ Modulator
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iqgen.phase = 0;
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iqgen.Frequency = IF_FREQ;
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iqgen.Amplitude = 127;
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iqgen.sample_rate = IQ_SAMPLE_RATE;
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init_composite(&vid_stat, 16000000, 768, 576,bmp_data.data);
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if(stdoutmode)
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{
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// stdout / stream mode : IQ are outputed to the stdout -> use a pipe to hackrf_transfer
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wave1 = create_wave(NULL,iqgen.sample_rate,WAVE_FILE_FORMAT_RAW_8BITS_IQ);
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wave2 = NULL;
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}
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else
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{
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// file mode : create iq + wav files
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wave1 = create_wave("broadcast_tv.iq",iqgen.sample_rate,WAVE_FILE_FORMAT_RAW_8BITS_IQ);
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wave2 = create_wave("broadcast_tv.wav",16000000,WAVE_FILE_FORMAT_WAV_16BITS_MONO);
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}
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for(i=0;i<1024*16*2 || stdoutmode;i++)
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{
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gen_video_signal(&vid_stat, (double*)&video_buf, BUFFER_SAMPLES_SIZE);
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for(j=0;j<BUFFER_SAMPLES_SIZE;j++)
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{
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subcarriers_dbg_wave_buf[j] = (int)((video_buf[j]/(double)100) * (double)32767);
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iqgen.Amplitude = ((double)video_buf[j]);
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iq_wave_buf[j] = get_next_iq(&iqgen);
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}
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write_wave(wave1, &iq_wave_buf,BUFFER_SAMPLES_SIZE);
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write_wave(wave2, &subcarriers_dbg_wave_buf,BUFFER_SAMPLES_SIZE);
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}
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close_wave(wave1);
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close_wave(wave2);
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}
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if( (isOption(argc,argv,"help",0)<=0) &&
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(isOption(argc,argv,"generate",0)<=0)
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)
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{
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printhelp(argv);
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}
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return 0;
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}
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@ -32,10 +32,14 @@
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#define EQUALIZING_PULSE_LEN 2.35
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#define LINE_PULSE_LEN 4.7
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#define ASSERTED_LEVEL 10
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#define DEASSERTED_LEVEL 100
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#define ASSERTED_LEVEL 0
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#define DEASSERTED_LEVEL 40
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#define COMPOSITE_LINE_PERIOD_US 64
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// PAL timings
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// PAL / Secam : 768 x 576
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// NTSC : 720 x 480 (Old : 640 x 480)
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// PAL-L timings
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pulses_state vertical_blanking[]=
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{
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// First sequence of equalizing pulses
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@ -45,8 +49,11 @@ pulses_state vertical_blanking[]=
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// Duration of second sequence of equalizing pulses
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{ 5, ASSERTED_LEVEL, DEASSERTED_LEVEL, EQUALIZING_PULSE_LEN/(double)1E6 ,((COMPOSITE_LINE_PERIOD_US/2)/(double)1E6),0},
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// Lines (6 > 310)
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{305, ASSERTED_LEVEL, DEASSERTED_LEVEL, LINE_PULSE_LEN/(double)1E6 ,((COMPOSITE_LINE_PERIOD_US)/(double)1E6),0},
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// Blank Lines (6 > 23)
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{18, ASSERTED_LEVEL, DEASSERTED_LEVEL, LINE_PULSE_LEN/(double)1E6 ,((COMPOSITE_LINE_PERIOD_US)/(double)1E6),0},
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// Lines (24 > 310)
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{287, ASSERTED_LEVEL, DEASSERTED_LEVEL, LINE_PULSE_LEN/(double)1E6 ,((COMPOSITE_LINE_PERIOD_US)/(double)1E6),1},
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// First sequence of equalizing pulses
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{ 5, ASSERTED_LEVEL, DEASSERTED_LEVEL, EQUALIZING_PULSE_LEN/(double)1E6 ,((COMPOSITE_LINE_PERIOD_US/2)/(double)1E6),0},
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@ -58,8 +65,11 @@ pulses_state vertical_blanking[]=
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// -- end of line 318
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{ 1, DEASSERTED_LEVEL, DEASSERTED_LEVEL, 0 ,(COMPOSITE_LINE_PERIOD_US/2)/(double)1E6,0},
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// Lines (319 > 622)
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{304, ASSERTED_LEVEL, DEASSERTED_LEVEL, LINE_PULSE_LEN/(double)1E6 ,(COMPOSITE_LINE_PERIOD_US)/(double)1E6,0},
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// Blank Lines (319 > 335)
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{17, ASSERTED_LEVEL, DEASSERTED_LEVEL, LINE_PULSE_LEN/(double)1E6 ,(COMPOSITE_LINE_PERIOD_US)/(double)1E6,0},
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// Lines (336 > 622)
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{287, ASSERTED_LEVEL, DEASSERTED_LEVEL, LINE_PULSE_LEN/(double)1E6 ,(COMPOSITE_LINE_PERIOD_US)/(double)1E6,3},
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// Line 623 - (half)
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{ 1, ASSERTED_LEVEL, DEASSERTED_LEVEL, LINE_PULSE_LEN/(double)1E6 ,((COMPOSITE_LINE_PERIOD_US)/2)/(double)1E6,0},
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@ -69,16 +79,57 @@ pulses_state vertical_blanking[]=
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};
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void init_composite(composite_state * state, int sample_rate, int x_res, int y_res)
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void init_composite(composite_state * state, int sample_rate, int x_res, int y_res, uint32_t * bmp)
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{
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int i;
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state->sample_period = (double)1 / (double)sample_rate;
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state->buf_x_res = x_res;
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state->buf_y_res = y_res;
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state->video_buffer = malloc( x_res * y_res * sizeof(uint32_t) );
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if(state->video_buffer)
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memset(state->video_buffer,0,x_res * y_res * sizeof(uint32_t) );
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state->video_buffer = bmp;
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if(!state->video_buffer)
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{
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state->video_buffer = malloc( x_res * y_res * sizeof(uint32_t) );
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if(state->video_buffer)
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{
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memset(state->video_buffer,0,x_res * y_res * sizeof(uint32_t) );
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// Basic Mire test init
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for(i=0;i<x_res;i++)
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state->video_buffer[i] = 0xFFFFFF;
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for(i=0;i<x_res;i++)
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state->video_buffer[((y_res-1)*x_res) + i] = 0xFFFFFF;
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for(i=0;i<y_res;i++)
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state->video_buffer[((i)*x_res)] = 0xFFFFFF;
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for(i=0;i<y_res;i++)
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state->video_buffer[((i)*x_res) + (x_res - 1)] = 0xFFFFFF;
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for(i=0;i<x_res/2;i++)
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{
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state->video_buffer[(x_res/4) + (((y_res/4)-1)*x_res) + i] = 0xFFFFFF;
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state->video_buffer[(x_res/4) + (((y_res/4)-1)*x_res) + i + x_res] = 0xFFFFFF;
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state->video_buffer[(x_res/4) + (((y_res - (y_res/4))-1)*x_res) + i] = 0xFFFFFF;
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state->video_buffer[(x_res/4) + (((y_res - (y_res/4))-1)*x_res) + i + x_res] = 0xFFFFFF;
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state->video_buffer[(x_res/4) + (((y_res - (y_res/2))-1)*x_res) + i] = 0x6F6F6F;
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state->video_buffer[(x_res/4) + (((y_res - (y_res/2))-1)*x_res) + i + x_res] = 0x6F6F6F;
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}
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for(i=y_res/4;i<(y_res - (y_res/4));i++)
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{
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state->video_buffer[(x_res/4) + ((i)*x_res)] = 0xFFFFFF;
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state->video_buffer[(x_res/4) + ((i)*x_res) + (x_res/4)] = 0x6F6F6F;
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state->video_buffer[(x_res/2) + ((i)*x_res) + (x_res/4)] = 0xFFFFFF;
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}
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}
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}
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state->step_index = 0;
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state->cur_state_time = 0;
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@ -86,7 +137,7 @@ void init_composite(composite_state * state, int sample_rate, int x_res, int y_r
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void gen_video_signal(composite_state * state, double * vid_signal, int buf_size)
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{
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int i;
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int i,xpos;
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double value;
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value = 0;
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@ -98,6 +149,11 @@ void gen_video_signal(composite_state * state, double * vid_signal, int buf_size
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state->cur_state_time = 0;
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state->repeat_cnt++;
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if(vertical_blanking[state->step_index].type & 1)
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state->cur_line_index++;
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else
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state->cur_line_index = 0;
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if( state->repeat_cnt >= vertical_blanking[state->step_index].repeat )
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{
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state->repeat_cnt = 0;
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@ -119,6 +175,35 @@ void gen_video_signal(composite_state * state, double * vid_signal, int buf_size
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value = vertical_blanking[state->step_index].start_val;
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}
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if(vertical_blanking[state->step_index].type & 1)
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{
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if(state->cur_state_time >= vertical_blanking[state->step_index].first_duration)
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{
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if(state->cur_state_time >= vertical_blanking[state->step_index].first_duration + ((3.5+4.7)/(double)1E6))
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{
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// Stream pixels line
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if(state->cur_state_time <= vertical_blanking[state->step_index].first_duration + ((3.5+4.7)/(double)1E6) + (45.6/(double)1E6) )
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{
|
||||
xpos = ((state->cur_state_time - ( vertical_blanking[state->step_index].first_duration + ((3.5+4.7)/(double)1E6) )) / (45.6/(double)1E6)) * state->buf_x_res;
|
||||
|
||||
value = vertical_blanking[state->step_index].end_val;
|
||||
value += ((double)((state->video_buffer[(state->cur_line_index * state->buf_x_res * 2) + ( state->buf_x_res * (((vertical_blanking[state->step_index].type>>1)^1)&1)) + xpos] & 0xFF)) * ((double)((double)100.0 - vertical_blanking[state->step_index].end_val)/(double)256));
|
||||
}
|
||||
else
|
||||
{
|
||||
value = vertical_blanking[state->step_index].end_val;
|
||||
}
|
||||
}
|
||||
else
|
||||
{
|
||||
// TODO : Color Burst
|
||||
value = vertical_blanking[state->step_index].end_val;
|
||||
}
|
||||
}
|
||||
}
|
||||
else
|
||||
state->cur_line_index = 0;
|
||||
|
||||
vid_signal[i] = value;
|
||||
|
||||
state->cur_state_time += state->sample_period;
|
||||
|
|
|
|||
|
|
@ -24,8 +24,6 @@
|
|||
// Change History (most recent first):
|
||||
///////////////////////////////////////////////////////////////////////////////////
|
||||
|
||||
#define COMPOSITE_LINE_PERIOD_US 64.0
|
||||
|
||||
typedef struct composite_state_
|
||||
{
|
||||
double sample_period;
|
||||
|
|
@ -35,6 +33,7 @@ typedef struct composite_state_
|
|||
|
||||
uint32_t * video_buffer;
|
||||
|
||||
int cur_line_index;
|
||||
int step_index;
|
||||
int repeat_cnt;
|
||||
|
||||
|
|
@ -53,5 +52,5 @@ typedef struct pulses_state_
|
|||
}pulses_state;
|
||||
|
||||
|
||||
void init_composite(composite_state * state, int sample_rate, int x_res, int y_res);
|
||||
void init_composite(composite_state * state, int sample_rate, int x_res, int y_res, uint32_t * bmp);
|
||||
void gen_video_signal(composite_state * state, double * vid_signal, int buf_size);
|
||||
|
|
|
|||
Loading…
Reference in New Issue