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  1. /*
  2. * This file is part of Aptdec.
  3. * Copyright (c) 2004-2009 Thierry Leconte (F4DWV), Xerbo (xerbo@protonmail.com) 2019-2020
  4. *
  5. * Aptdec is free software: you can redistribute it and/or modify
  6. * it under the terms of the GNU General Public License as published by
  7. * the Free Software Foundation, either version 2 of the License, or
  8. * (at your option) any later version.
  9. *
  10. * This program is distributed in the hope that it will be useful,
  11. * but WITHOUT ANY WARRANTY; without even the implied warranty of
  12. * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
  13. * GNU General Public License for more details.
  14. *
  15. * You should have received a copy of the GNU General Public License
  16. * along with this program. If not, see <https://www.gnu.org/licenses/>.
  17. *
  18. */
  19. #include <stdlib.h>
  20. #include <stdio.h>
  21. #include <string.h>
  22. #include <getopt.h>
  23. #include <libgen.h>
  24. #include <math.h>
  25. #include <sndfile.h>
  26. #include <errno.h>
  27. #include "messages.h"
  28. #include "offsets.h"
  29. #define FAILURE 0
  30. #define SUCCESS 1
  31. typedef struct {
  32. char *type; // Output image type
  33. char *effects;
  34. int satnum; // The satellite number
  35. char *map; // Path to a map file
  36. char *path; // Output directory
  37. int realtime;
  38. } options_t;
  39. typedef struct {
  40. float *prow[MAX_HEIGHT]; // Row buffers
  41. int nrow; // Number of rows
  42. int chA, chB; // ID of each channel
  43. char name[256]; // Stripped filename
  44. } image_t;
  45. // DSP
  46. extern int getpixelrow(float *pixelv, int nrow, int *zenith);
  47. extern int init_dsp(double F);
  48. // I/O
  49. extern int readfcconf(char *file);
  50. extern int readRawImage(char *filename, float **prow, int *nrow);
  51. extern int ImageOut(options_t *opts, image_t *img, int offset, int width, char *desc, char *chid, char *palette);
  52. extern void closeWriter();
  53. extern void pushRow(float *row, int width);
  54. extern int initWriter(options_t *opts, image_t *img, int width, int height, char *desc, char *chid);
  55. // Image functions
  56. extern int calibrate(float **prow, int nrow, int offset, int width);
  57. extern void histogramEqualise(float **prow, int nrow, int offset, int width);
  58. extern void temperature(options_t *opts, image_t *img, int offset, int width);
  59. extern int Ngvi(float **prow, int nrow);
  60. extern void denoise(float **prow, int nrow, int offset, int width);
  61. extern void distrib(options_t *opts, image_t *img, char *chid);
  62. // Palettes
  63. extern char GviPalette[256*3];
  64. extern char TempPalette[256*3];
  65. // Row where the satellite is closest to the observer
  66. int zenith = 0;
  67. // Audio file
  68. static SNDFILE *audioFile;
  69. static int initsnd(char *filename);
  70. int getsample(float *sample, int nb);
  71. static int processAudio(char *filename, options_t *opts);
  72. static void usage(void);
  73. int main(int argc, char **argv) {
  74. fprintf(stderr, VERSION"\n");
  75. if(argc == 1)
  76. usage();
  77. // Check if there are actually any input files
  78. if(optind == argc){
  79. fprintf(stderr, "No input files provided.\n");
  80. usage();
  81. }
  82. options_t opts = { "r", "", 19, "", ".", 0 };
  83. // Parse arguments
  84. int opt;
  85. while ((opt = getopt(argc, argv, "c:m:d:i:s:e:r")) != EOF) {
  86. switch (opt) {
  87. case 'd':
  88. opts.path = optarg;
  89. break;
  90. case 'c':
  91. readfcconf(optarg);
  92. break;
  93. case 'm':
  94. opts.map = optarg;
  95. break;
  96. case 'i':
  97. opts.type = optarg;
  98. break;
  99. case 's':
  100. opts.satnum = atoi(optarg);
  101. if(opts.satnum < 15 || opts.satnum > 19){
  102. fprintf(stderr, "Invalid satellite number, it must be the range 15-19\n");
  103. exit(EPERM);
  104. }
  105. break;
  106. case 'e':
  107. opts.effects = optarg;
  108. break;
  109. case 'r':
  110. opts.realtime = 1;
  111. break;
  112. default:
  113. usage();
  114. }
  115. }
  116. // Process the files
  117. for (; optind < argc; optind++) {
  118. processAudio(argv[optind], &opts);
  119. }
  120. exit(0);
  121. }
  122. static int processAudio(char *filename, options_t *opts){
  123. // Image info struct
  124. image_t img;
  125. // Mapping between wedge value and channel ID
  126. static struct {
  127. char *id[7];
  128. char *name[7];
  129. } ch = {
  130. { "?", "1", "2", "3A", "4", "5", "3B" },
  131. { "unknown", "visble", "near-infrared", "mid-infrared", "thermal-infrared", "thermal-infrared", "mid-infrared" }
  132. };
  133. // Buffer for image channel
  134. char desc[60];
  135. // Parse file path
  136. char path[256], extension[32];
  137. strcpy(path, filename);
  138. strcpy(path, dirname(path));
  139. sscanf(basename(filename), "%[^.].%s", img.name, extension);
  140. if(opts->realtime) initWriter(opts, &img, IMG_WIDTH, MAX_HEIGHT, "Unprocessed realtime image", "r");
  141. if(strcmp(extension, "png") == 0){
  142. // Read PNG into image buffer
  143. printf("Reading %s", filename);
  144. if(readRawImage(filename, img.prow, &img.nrow) == 0){
  145. fprintf(stderr, "Skipping %s; see above.\n", img.name);
  146. return FAILURE;
  147. }
  148. }else{
  149. // Attempt to open the audio file
  150. if (initsnd(filename) == 0)
  151. exit(EPERM);
  152. // Build image
  153. for (img.nrow = 0; img.nrow < MAX_HEIGHT; img.nrow++) {
  154. // Allocate memory for this row
  155. img.prow[img.nrow] = (float *) malloc(sizeof(float) * 2150);
  156. // Write into memory and break the loop when there are no more samples to read
  157. if (getpixelrow(img.prow[img.nrow], img.nrow, &zenith) == 0)
  158. break;
  159. if(opts->realtime) pushRow(img.prow[img.nrow], IMG_WIDTH);
  160. fprintf(stderr, "Row: %d\r", img.nrow);
  161. fflush(stderr);
  162. }
  163. // Close stream
  164. sf_close(audioFile);
  165. }
  166. if(opts->realtime) closeWriter();
  167. printf("\nTotal rows: %d\n", img.nrow);
  168. // Fallback for detecting the zenith
  169. // TODO: encode zenith in raw images
  170. if(opts->map != NULL && opts->map[0] != '\0' && zenith == 0){
  171. fprintf(stderr, "Guessing zenith in image, map will most likely be misaligned.\n");
  172. zenith = img.nrow / 2;
  173. }
  174. // Calibrate
  175. img.chA = calibrate(img.prow, img.nrow, CHA_OFFSET, CH_WIDTH);
  176. img.chB = calibrate(img.prow, img.nrow, CHB_OFFSET, CH_WIDTH);
  177. printf("Channel A: %s (%s)\n", ch.id[img.chA], ch.name[img.chA]);
  178. printf("Channel B: %s (%s)\n", ch.id[img.chB], ch.name[img.chB]);
  179. // Denoise
  180. if(CONTAINS(opts->effects, 'd')){
  181. denoise(img.prow, img.nrow, CHA_OFFSET, CH_WIDTH);
  182. denoise(img.prow, img.nrow, CHB_OFFSET, CH_WIDTH);
  183. }
  184. // Temperature
  185. if (CONTAINS(opts->type, 't') && img.chB >= 4) {
  186. temperature(opts, &img, CHB_OFFSET, CH_WIDTH);
  187. ImageOut(opts, &img, CHB_OFFSET, CH_WIDTH, "Temperature", "t", (char *)TempPalette);
  188. }
  189. // False color image
  190. if(CONTAINS(opts->type, 'c')){
  191. if (img.chA == 2 && img.chB >= 4) { // Normal false color
  192. // TODO: use real MSA
  193. // TODO: provide more than just "natural" color images
  194. ImageOut(opts, &img, 0, CH_WIDTH, "False Color", "c", NULL);
  195. } else if (img.chB == 2) { // GVI (global vegetation index) false color
  196. Ngvi(img.prow, img.nrow);
  197. ImageOut(opts, &img, CHB_OFFSET, CH_WIDTH, "GVI False Color", "c", (char *)GviPalette);
  198. } else {
  199. fprintf(stderr, "Skipping False Color generation; lacking required channels.\n");
  200. }
  201. }
  202. // MCIR
  203. if (CONTAINS(opts->type, 'm'))
  204. ImageOut(opts, &img, 0, IMG_WIDTH, "MCIR", "m", NULL);
  205. // Histogram equalise
  206. if(CONTAINS(opts->effects, 'h')){
  207. histogramEqualise(img.prow, img.nrow, CHA_OFFSET, CH_WIDTH);
  208. histogramEqualise(img.prow, img.nrow, CHB_OFFSET, CH_WIDTH);
  209. }
  210. // Raw image
  211. if (CONTAINS(opts->type, 'r')) {
  212. sprintf(desc, "%s (%s) & %s (%s)", ch.id[img.chA], ch.name[img.chA], ch.id[img.chB], ch.name[img.chB]);
  213. ImageOut(opts, &img, 0, IMG_WIDTH, desc, "r", NULL);
  214. }
  215. // Channel A
  216. if (CONTAINS(opts->type, 'a')) {
  217. sprintf(desc, "%s (%s)", ch.id[img.chA], ch.name[img.chA]);
  218. ImageOut(opts, &img, CHA_OFFSET, CH_WIDTH, desc, ch.id[img.chA], NULL);
  219. }
  220. // Channel B
  221. if (CONTAINS(opts->type, 'b')) {
  222. sprintf(desc, "%s (%s)", ch.id[img.chB], ch.name[img.chB]);
  223. ImageOut(opts, &img, CHB_OFFSET, CH_WIDTH, desc, ch.id[img.chB], NULL);
  224. }
  225. // Distribution image
  226. if (CONTAINS(opts->type, 'd'))
  227. distrib(opts, &img, "d");
  228. return SUCCESS;
  229. }
  230. static int initsnd(char *filename) {
  231. SF_INFO infwav;
  232. int res;
  233. // Open audio file
  234. infwav.format = 0;
  235. audioFile = sf_open(filename, SFM_READ, &infwav);
  236. if (audioFile == NULL) {
  237. fprintf(stderr, ERR_FILE_READ, filename);
  238. return FAILURE;
  239. }
  240. res = init_dsp(infwav.samplerate);
  241. printf("Input file: %s\n", filename);
  242. if(res < 0) {
  243. fprintf(stderr, "Input sample rate too low: %d\n", infwav.samplerate);
  244. return FAILURE;
  245. }else if(res > 0) {
  246. fprintf(stderr, "Input sample rate too high: %d\n", infwav.samplerate);
  247. return FAILURE;
  248. }
  249. printf("Input sample rate: %d\n", infwav.samplerate);
  250. // TODO: accept stereo audio
  251. if (infwav.channels != 1) {
  252. fprintf(stderr, "Too many channels in input file: %d\n", infwav.channels);
  253. return FAILURE;
  254. }
  255. return SUCCESS;
  256. }
  257. // Read samples from the wave file
  258. int getsample(float *sample, int nb) {
  259. return sf_read_float(audioFile, sample, nb);
  260. }
  261. static void usage(void) {
  262. fprintf(stderr,
  263. "Aptdec [options] audio files ...\n"
  264. "Options:\n"
  265. " -e [t|h] Effects\n"
  266. " t: Crop telemetry\n"
  267. " h: Histogram equalise\n"
  268. " d: Denoise\n"
  269. " p: Precipitation\n"
  270. " -i [r|a|b|c|t|m] Output image\n"
  271. " r: Raw\n"
  272. " a: Channel A\n"
  273. " b: Channel B\n"
  274. " c: False color\n"
  275. " t: Temperature\n"
  276. " m: MCIR\n"
  277. " -d <dir> Image destination directory.\n"
  278. " -s [15-19] Satellite number\n"
  279. " -c <file> False color config file\n"
  280. " -m <file> Map file\n"
  281. " -r Realtime decode\n");
  282. exit(EINVAL);
  283. }