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authorMatthias P. Braendli <matthias.braendli@mpb.li>2014-07-07 18:01:37 +0200
committerMatthias P. Braendli <matthias.braendli@mpb.li>2014-07-07 18:01:37 +0200
commitd455aa0dd30ba0a63f9fadfebbd25fe1ae10529f (patch)
tree3a31def3fd89fee799b36924f0bb68d997bf77c8 /src
parent30f618e1ac0b0a41c2b5de7e9e10ac8ad55cd2dd (diff)
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Remove dls-encoder
Diffstat (limited to 'src')
-rw-r--r--src/dls.c454
1 files changed, 0 insertions, 454 deletions
diff --git a/src/dls.c b/src/dls.c
deleted file mode 100644
index 457a26d..0000000
--- a/src/dls.c
+++ /dev/null
@@ -1,454 +0,0 @@
-/*
- Copyright (C) 2014 CSP Innovazione nelle ICT s.c.a r.l. (http://rd.csp.it/)
-
- 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 3 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, see <http://www.gnu.org/licenses/>.
-
- dls.c
- Generete PAD data for DLS
-
- Authors:
- Matthias P. Braendli
- http://opendigitalradio.org
-
- Sergio Sagliocco <sergio.sagliocco@csp.it>
-*/
-
-#include <stdio.h>
-#include <stdlib.h>
-#include <unistd.h>
-#include <string.h>
-#include <sys/types.h>
-#include <sys/stat.h>
-#include <fcntl.h>
-#include <getopt.h>
-
-#include "lib_crc.h"
-
-#define MIN(a,b) (((a)<(b))?(a):(b))
-#define MAX(a,b) (((a)>(b))?(a):(b))
-
-#define MAXSEGLEN 8179
-#define MAXDLS 129
-
-typedef unsigned char UCHAR;
-typedef unsigned short int USHORT;
-
-void create_dls_datagroup (char* text, int padlen, unsigned char*** p_dlsdg, int* p_numdg);
-void writeDLS(int output_fd, const char* dls_file, int padlen);
-
-int get_xpadlengthmask(int padlen);
-#define ALLOWED_PADLEN "23, 26, 34, 42, 58"
-
-void usage(char* name)
-{
- fprintf(stderr, "DAB DLS encoder %s\n\n"
- "By CSP Innovazione nelle ICT s.c.a r.l. (http://rd.csp.it/)\n"
- "and Opendigitalradio.org\n\n"
- "Reads DLS from /tmp/dls.txt\n\n"
- "WARNING: This program has memory leaks! Do not attempt\n"
- "to leave it running for long periods of time!\n\n"
- " http://opendigitalradio.org\n\n",
-#if defined(GITVERSION)
- GITVERSION
-#else
- PACKAGE_VERSION
-#endif
- );
- fprintf(stderr, "Usage: %s [OPTIONS...]\n", name);
- fprintf(stderr,
- " -o, --output=FILENAME Fifo to write PAD data into.\n"
- " Default: /tmp/pad.fifo\n"
- " -t, --dls=FILENAME Fifo or file to read DLS text from.\n"
- " Default: /tmp/dls.txt\n"
- " -p, --pad=LENGTH Set the pad length.\n"
- " Possible values: " ALLOWED_PADLEN "\n"
- " Default: 58\n"
- );
-}
-
-#define no_argument 0
-#define required_argument 1
-#define optional_argument 2
-int main(int argc, char *argv[])
-{
- int len, ret;
- int padlen=58;
-
- char* output = "/tmp/pad.fifo";
- char* dls_file = "/tmp/dls.txt";
-
- const struct option longopts[] = {
- {"output", required_argument, 0, 'o'},
- {"dls", required_argument, 0, 't'},
- {"pad", required_argument, 0, 'p'},
- {"help", no_argument, 0, 'h'},
- {0,0,0,0},
- };
-
- if (argc < 2) {
- fprintf(stderr, "Error: too few arguments!\n");
- usage(argv[0]);
- return 2;
- }
-
- int ch=0;
- int index;
- while(ch != -1) {
- ch = getopt_long(argc, argv, "ho:t:p:", longopts, &index);
- switch (ch) {
- case 'o':
- output = optarg;
- break;
- case 't':
- dls_file = optarg;
- break;
- case 'p':
- padlen = atoi(optarg);
- break;
- case '?':
- case 'h':
- usage(argv[0]);
- return 0;
- }
- }
-
- if (get_xpadlengthmask(padlen) == -1) {
- fprintf(stderr, "Error: pad length %d invalid: Possible values: "
- ALLOWED_PADLEN "\n",
- padlen);
- return 2;
- }
-
- int output_fd = open(output, O_WRONLY);
- if (output_fd == -1) {
- perror("Failed to open output");
- return 3;
- }
-
- writeDLS(output_fd, dls_file, padlen);
-
- /* Do it twice, so that there is for sure one toggle done
- * by create_dls_datagroup
- *
- * It's ugly, I know.
- */
- writeDLS(output_fd, dls_file, padlen);
-
- return 0;
-}
-
-
-void writeDLS(int output_fd, const char* dls_file, int padlen) {
- char dlstext[MAXDLS];
- static char dlstextprev[MAXDLS];
- int dlslen;
- int i;
- static unsigned char** dlsdg;
- static int numdg = 0;
-
- static int dlsfd = 0;
-
- if (dlsfd!=0) {
- close(dlsfd);
- }
-
- dlsfd = open(dls_file, O_RDONLY);
- if (dlsfd == -1) {
- fprintf(stderr,"Error - Cannot open dls file\n");
- return;
- }
-
- dlslen = read(dlsfd, dlstext, MAXDLS);
- dlstext[dlslen] = 0x00;
- //if (strcmp(dlstext,dlstextprev)!=0) {
- create_dls_datagroup(dlstext, padlen, &dlsdg, &numdg);
- strcpy(dlstextprev, dlstext);
- //}
- for (i = 0; i < numdg; i++) {
- write(output_fd, dlsdg[i], padlen);
- }
-
-}
-
-void create_dls_datagroup (char* text, int padlen, UCHAR*** p_dlsdg, int* p_numdg) {
-
- UCHAR dlsseg[8][16]; // max 8 segments, each max 16 chars
- UCHAR** dlsdg; // Array of datagroups composing dls text;
-
-
- int numseg; // Number of DSL segments
- int lastseglen; // Length of the last segment
- int numdg; // Number of data group
- int xpadlengthmask;
- int i, j, k, z, idx_start_crc, idx_stop_crc;
- USHORT dlscrc;
- static UCHAR toggle = 0;
-
- if (toggle == 0)
- toggle = 1;
- else
- toggle = 0;
-
- numseg = strlen(text) / 16;
- lastseglen = strlen(text) % 16;
- if (padlen-9 >= 16) {
- if (lastseglen > 0) {
- numseg++; // The last incomplete segment
- }
-
- // The PAD can contain the full segmnet and overhead (9 bytes)
- numdg = numseg;
-
- }
- else {
- // Each 16 char segment span over 2 dg
- numdg = numseg * 2;
-
- if (lastseglen > 0) {
- numseg++; // The last incomplete segment
-
- if (lastseglen <= padlen-9) {
- numdg += 1;
- }
- else {
- numdg += 2;
- }
- }
- }
-
- *p_numdg = numdg;
- fprintf(stderr, "PAD Length: %d\n", padlen);
- fprintf(stderr, "DLS text: %s\n", text);
- fprintf(stderr, "Number of DLS segments: %d\n", numseg);
- fprintf(stderr, "Number of DLS data groups: %d\n", numdg);
-
- xpadlengthmask = get_xpadlengthmask(padlen);
-
- *p_dlsdg = (UCHAR**) malloc(numdg * sizeof(UCHAR*));
- dlsdg = *p_dlsdg;
-
- i = 0;
- for (z=0; z < numseg; z++) {
- char* curseg;
- int curseglen;
- UCHAR firstseg, lastseg;
-
- curseg = &text[z * 16];
- fprintf(stderr, "Segment number %d\n", z+1);
-
- if (z == 0) { // First segment
- firstseg = 1;
- }
- else {
- firstseg = 0;
- }
-
- if (z == numseg-1) { //Last segment
- if (lastseglen != 0) {
- curseglen = lastseglen;
- }
- else {
- curseglen = 16;
- }
- lastseg = 1;
- }
- else {
- curseglen = 16;
- lastseg = 0;
- }
-
- if (curseglen <= padlen-9) { // Segment is composed of 1 data group
- dlsdg[i] = (UCHAR*) malloc(padlen * sizeof(UCHAR));
-
- // FF-PAD Byte L (CI=1)
- dlsdg[i][padlen-1]=0x02;
-
- // FF-PAD Byte L-1 (Variable size X_PAD)
- dlsdg[i][padlen-2]=0x20;
-
- // CI => data length = 12 (011) - Application Type=2
- // (DLS - start of X-PAD data group)
- dlsdg[i][padlen-3]=(xpadlengthmask<<5) | 0x02;
-
- // End of CI list
- dlsdg[i][padlen-4]=0x00;
-
- // DLS Prefix (T=1,Only one segment,segment length-1)
- dlsdg[i][padlen-5]=((toggle*8+firstseg*4+lastseg*2+0)<<4) | (curseglen-1);
-
- if (firstseg==1) {
- // DLS Prefix (Charset standard)
- dlsdg[i][padlen-6]=0x00;
- }
- else {
- // DLS SegNum
- dlsdg[i][padlen-6]=z<<4;
- }
-
- // CRC start from prefix
- idx_start_crc = padlen-5;
-
- // DLS text
- for (j = 0; j < curseglen; j++) {
- dlsdg[i][padlen-7-j] = curseg[j];
- }
-
- idx_stop_crc = padlen - 7 - curseglen+1;
-
- dlscrc = 0xffff;
- for (j = idx_start_crc; j >= idx_stop_crc; j--) {
- dlscrc = update_crc_ccitt(dlscrc, dlsdg[i][j]);
- }
-
- dlscrc = ~dlscrc;
- fprintf(stderr, "crc=%x ~crc=%x\n", ~dlscrc, dlscrc);
-
- dlsdg[i][padlen-7-curseglen] = (dlscrc & 0xFF00) >> 8; // HI CRC
- dlsdg[i][padlen-7-curseglen-1] = dlscrc & 0x00FF; // LO CRC
-
- // NULL PADDING
- for (j = padlen-7-curseglen-2; j >= 0; j--) {
- dlsdg[i][j]=0x00;
- }
-
- fprintf(stderr, "Data group: ");
- for (j = 0; j < padlen; j++)
- fprintf(stderr, "%x ", dlsdg[i][j]);
- fprintf(stderr, "\n");
- i++;
-
- }
- else { // Segment is composed of 2 data groups
-
- // FIRST DG (NO CRC)
- dlscrc = 0xffff;
-
- dlsdg[i] = (UCHAR*) malloc(padlen * sizeof(UCHAR));
-
- // FF-PAD Byte L (CI=1)
- dlsdg[i][padlen-1]=0x02;
-
- // FF-PAD Byte L-1 (Variable size X_PAD)
- dlsdg[i][padlen-2]=0x20;
-
- // CI => data length = 12 (011) - Application Type=2
- // (DLS - start of X-PAD data group)
- dlsdg[i][padlen-3]=(xpadlengthmask<<5) | 0x02;
-
- // End of CI list
- dlsdg[i][padlen-4]=0x00;
-
- // DLS Prefix (T=1,Only one segment,segment length-1)
- dlsdg[i][padlen-5]=((toggle*8+firstseg*4+lastseg*2+0)<<4) | (curseglen-1);
-
-
- if (firstseg == 1) {
- // DLS Prefix (Charset standard)
- dlsdg[i][padlen-6] = 0x00;
- }
- else {
- // DLS SegNum
- dlsdg[i][padlen-6]=(i-1)<<4;
- }
-
- dlscrc = update_crc_ccitt(dlscrc, dlsdg[i][padlen-5]);
- dlscrc = update_crc_ccitt(dlscrc, dlsdg[i][padlen-6]);
-
- // DLS text
- for (j=0; j < MIN(curseglen, padlen-7); j++) {
- dlsdg[i][padlen-7-j] = curseg[j];
- dlscrc = update_crc_ccitt(dlscrc, dlsdg[i][padlen-7-j]);
- }
- k = j;
-
- // end of segment
- if (curseglen == padlen-8) {
- dlscrc = ~dlscrc;
- dlsdg[i][1] = (dlscrc & 0xFF00) >> 8; // HI CRC
- fprintf(stderr, "crc=%x ~crc=%x\n", ~dlscrc, dlscrc);
- }
- else if (curseglen == padlen-7) {
- dlscrc = ~dlscrc;
- fprintf(stderr, "crc=%x ~crc=%x\n", ~dlscrc, dlscrc);
- }
- dlsdg[i][0]=0x00;
-
- fprintf(stderr, "First Data group: ");
- for (j = 0; j < padlen; j++)
- fprintf(stderr, "%x ", dlsdg[i][j]);
- fprintf(stderr,"\n");
-
- // SECOND DG (NO CI, NO PREFIX)
- i++;
-
- dlsdg[i] = (UCHAR*) malloc(padlen*sizeof(UCHAR));
-
- // FF-PAD Byte L (CI=0)
- dlsdg[i][padlen-1] = 0x00;
-
- // FF-PAD Byte L-1 (Variable size X_PAD)
- dlsdg[i][padlen-2] = 0x20;
-
- if (curseglen == padlen-8) {
- dlsdg[i][padlen-3] = dlscrc & 0x00FF; // LO CRC
- }
- else if (curseglen==padlen-7) {
- dlsdg[i][padlen-3] = (dlscrc & 0xFF00) >> 8; // HI CRC
- dlsdg[i][padlen-4] = dlscrc & 0x00FF; // LO CRC
- }
- else {
- // DLS text
- for (j = 0; j < curseglen-k; j++) {
- dlsdg[i][padlen-3-j] = curseg[k+j];
- dlscrc = update_crc_ccitt(dlscrc, dlsdg[i][padlen-3-j]);
- }
- dlscrc = ~dlscrc;
- dlsdg[i][padlen-3-curseglen+k] = (dlscrc & 0xFF00) >> 8; // HI CRC
- dlsdg[i][padlen-3-curseglen+k-1] = dlscrc & 0x00FF; // LO CRC
- }
-
- fprintf(stderr, "Second Data group: ");
- for (j = 0; j < padlen; j++)
- fprintf(stderr, "%x ", dlsdg[i][j]);
-
- fprintf(stderr, "\n");
- fprintf(stderr, "**** crc=%x ~crc=%x\n", ~dlscrc, dlscrc);
- i++;
- }
- }
-}
-
-int get_xpadlengthmask(int padlen)
-{
- int xpadlengthmask;
-
- /* Don't forget to change ALLOWED_PADLEN
- * if you change this check
- */
- if (padlen == 23)
- xpadlengthmask = 3;
- else if (padlen == 26)
- xpadlengthmask = 4;
- else if (padlen == 34)
- xpadlengthmask = 5;
- else if (padlen == 42)
- xpadlengthmask = 6;
- else if (padlen == 58)
- xpadlengthmask = 7;
- else
- xpadlengthmask = -1; // Error
-
- return xpadlengthmask;
-}
-