nice refactors, now way cleaner to work with!

src/main.c

@@ -0,0 +1,69 @@
+#include "encoder/modes/martin.h"
+#include "encoder/modes/scottie.h"
+#include "encoder/sstv.h"
+#include <stdio.h>
+#include <string.h>
+#include <time.h>
+
+static void usage(const char *prog) {
+    fprintf(stderr,
+        "Usage: %s <mode> <input_image> <output_wav>\n"
+        "\n"
+        "Modes:\n"
+        "  robot36    Robot 36 (320x240)\n"
+        "  martin1    Martin M1 (320x256)\n"
+        "  martin2    Martin M2 (320x256)\n"
+        "  scottie1   Scottie S1 (320x256)\n"
+        "  scottie2   Scottie S2 (320x256)\n"
+        "  scottiedx  Scottie DX (320x256)\n"
+        "\n"
+        "Example:\n"
+        "  %s mode photo.jpg output.wav\n",
+        prog, prog);
+}
+
+int main(int argc, char *argv[]) {
+    if (argc != 4) {
+        usage(argv[0]);
+        return 1;
+    }
+
+    const char *mode       = argv[1];
+    const char *input_img  = argv[2];
+    const char *output_wav = argv[3];
+    
+    clock_t start = clock();
+
+    int ok = 0;
+
+    if (strcmp(mode, "robot36") == 0) {
+        ok = sstv_encode_robot36(input_img, output_wav);
+    } else if (strcmp(mode, "martin1") == 0) {
+        ok = sstv_encode_martin(input_img, output_wav, &MARTIN_M1);
+    } else if (strcmp(mode, "martin2") == 0) {
+        ok = sstv_encode_martin(input_img, output_wav, &MARTIN_M2);
+    } else if (strcmp(mode, "scottie1") == 0) {
+        ok = sstv_encode_scottie(input_img, output_wav, &SCOTTIE_S1);
+    } else if (strcmp(mode, "scottie2") == 0) {
+        ok = sstv_encode_scottie(input_img, output_wav, &SCOTTIE_S2);
+    } else if (strcmp(mode, "scottiedx") == 0) {
+        ok = sstv_encode_scottie(input_img, output_wav, &SCOTTIE_DX);
+    } else {
+        fprintf(stderr, "unknown mode: %s\n\n", mode);
+        usage(argv[0]);
+        return 1;
+    }
+
+    if (!ok) {
+        fprintf(stderr, "make sure the file exsists");
+        return 1;
+    }
+
+    clock_t end = clock();
+
+    double elapsed = (double)(end - start) / CLOCKS_PER_SEC;
+
+    printf("encoded '%s' -> '%s' using '%s'\n", input_img, output_wav, mode);
+    printf("took %.3f seconds\n", elapsed);
+    return 0;
+}