First commit

README.md

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+# txt->midi
+
+Short program I wrote to convert .txt format of music used in the game Azimuth from Matthew D. Steele (see https://github.com/mdsteele/azimuth) into .mid files.
+
+This is given without any kind of warranty.
+
+> /*=============================================================================
+> | Written by Rayerdyne (2019) to make midi file from custom music format used |
+> | in Azimuth, using parts of Azimuth's functionnalities.                      | 
+> |                                                                             |
+> | Do wathever you want with this part of the code, its only initial goal was  |
+> | to make music arrangement easier. The code is given without any warranty.   |
+> |                                                                             |
+> | /!\ See Azimuth's sources files for their licenses.                         |
+> |                                                                             |
+> =============================================================================*/

data.c

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+/*=============================================================================
+| Written by Rayerdyne (2019) to make midi file from custom music format used |
+| in Azimuth, using parts of Azimuth's functionnalities.                      | 
+|                                                                             |
+| Do wathever you want with this part of the code, its only initial goal was  |
+| to make music arrangement easier. The code is given without any warranty.   |
+|                                                                             |
+| /!\ See Azimuth's sources files for their licenses.                         |
+|                                                                             |
+=============================================================================*/
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+
+#include "data.h"
+
+#define LENGTH 5
+
+static char get_char(char c[LENGTH], FILE *file) {
+   int i;
+   for (i = 0; i < LENGTH - 1; i++)
+      c[i] = c[i+1];
+   c[LENGTH-1] = fgetc(file);
+   return c[LENGTH -1];
+}
+
+static bool is_num(char c){
+   return ('0' <= c && c <= '9');
+}
+
+midi_music_voices_data *midi_read_voices_data(char *file_name){
+   FILE *file = fopen(file_name, "r");
+   if (!file) {
+      fprintf(stderr, "could not open file %s\n", file_name);
+      exit(EXIT_FAILURE);
+      }
+
+   midi_music_voices_data *data = (midi_music_voices_data*) malloc (sizeof(midi_music_voices_data));
+   data->parts = (midi_part_data**) malloc (sizeof(midi_part_data *));
+
+   char line[1024];
+   char *s;
+   do {
+      s = fgets(line, 1024, file);
+      s = strstr(line, "=tempo ");
+   } while ( s == NULL && !feof(file));
+
+   s = s + 7;// length of '=tempo '  
+   int tempo = atoi(s);
+   if (tempo == 0) {
+      fprintf(stderr, "ERROR reading the tempo\n");
+      exit(EXIT_FAILURE);
+      }
+   data->tempo = tempo;
+   data->num_parts = 0;
+   int i = 0;
+
+   char c[LENGTH+1] = {0};
+   for (i = 0; i < LENGTH; i++)
+      get_char(c, file);
+   do {
+      get_char(c, file);
+      } while (strcmp (c, "!Part") != 0 && !feof(file));
+
+   i = 0;
+   do {
+      data->num_parts++;
+//      fprintf(stderr, "reading: part index: %d\n", i);
+      data->parts = (midi_part_data **) realloc(data->parts, data->num_parts*sizeof(midi_part_data *));
+      data->parts[i] = (midi_part_data *) malloc(sizeof(midi_part_data));
+      data->parts[i]->num_voices = 0;
+      int j;
+      for (j = 0; j < AZ_MUSIC_NUM_TRACKS; j++)
+         data->parts[i]->voices[j] = false;
+      do {
+         get_char(c, file);
+         if (c[0] == '\n' && is_num(c[1]) && c[2] == '|' && c[3] == ' ' &&
+             ! data->parts[i]->voices[c[1]-'1']) {
+            data->parts[i]->voices[c[1]-'1'] = true;
+            data->parts[i]->num_voices++;
+            if (data->parts[i]->num_voices > AZ_MUSIC_NUM_TRACKS) {
+               fprintf(stderr, "number of voices is too high !");
+               exit(EXIT_FAILURE);
+               }
+            }
+      } while (strcmp (c, "!Part") != 0 && !feof(file));
+      i++;
+   } while (!feof(file));
+
+   printf("read %d parts\n", i);
+//   fclose(file);
+   return data;
+}
+
+
+void midi_free_music_voices_data(midi_music_voices_data *data) {
+   int i;
+   for (i = 0; i < data->num_parts; i++)
+      free(data->parts[i]);
+   free(data->parts);
+   free(data);
+}
+
+void midi_print_music_voices_data(midi_music_voices_data *data) {
+   int i;
+   printf("num_parts: %d\n", data->num_parts);
+   for (i = 0; i < data->num_parts; i++)
+      printf("part %d: [%d|%d|%d|%d|%d]\n", i, data->parts[i]->voices[0], data->parts[i]->voices[1],
+                                               data->parts[i]->voices[2], data->parts[i]->voices[3],
+                                               data->parts[i]->voices[4]);
+}
+
+

data.h

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+/*=============================================================================
+| Written by Rayerdyne (2019) to make midi file from custom music format used |
+| in Azimuth, using parts of Azimuth's functionnalities.                      | 
+|                                                                             |
+| Do wathever you want with this part of the code, its only initial goal was  |
+| to make music arrangement easier. The code is given without any warranty.   |
+|                                                                             |
+| /!\ See Azimuth's sources files for their licenses.                         |
+|                                                                             |
+=============================================================================*/
+
+#ifndef MIDI_DATA
+#define MIDI_DATA 
+
+#include <stdbool.h>
+
+//#include "azimuth/util/music.h"
+#define AZ_MUSIC_NUM_TRACKS 5
+
+typedef struct {
+   bool voices[AZ_MUSIC_NUM_TRACKS];
+   int num_voices;
+} midi_part_data;
+
+typedef struct {
+   midi_part_data **parts;
+   int num_parts;
+   int tempo;
+} midi_music_voices_data;
+
+midi_music_voices_data *midi_read_voices_data(char *file_name);
+void midi_free_music_voices_data(midi_music_voices_data *voices_data);
+void midi_print_music_voices_data(midi_music_voices_data *voices_data);
+
+#endif //MIDI_DATA

main.c

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+/*=============================================================================
+| Written by Rayerdyne (2019) to make midi file from custom music format used |
+| in Azimuth, using parts of Azimuth's functionnalities.                      | 
+|                                                                             |
+| Do wathever you want with this part of the code, its only initial goal was  |
+| to make music arrangement easier. The code is given without any warranty.   |
+|                                                                             |
+| /!\ See Azimuth's sources files for their licenses.                         |
+|                                                                             |
+=============================================================================*/
+
+#include <stdbool.h>
+#include <stdlib.h>
+
+#include "azimuth/util/music.h"
+#include "azimuth/state/music.h"
+#include "midi/midi.h"
+#include "midi/data.h"
+
+
+// <copied>
+az_music_t music;
+static void destroy_music(void) {
+  az_destroy_music(&music);
+}
+// </copied>
+
+int main(int argc, char **argv)
+{
+   if (argc < 3) {
+      fprintf(stderr, "Usage: <input file> <output file>\n");
+      return EXIT_SUCCESS;
+      }
+
+   midi_music_voices_data *data = midi_read_voices_data(argv[1]);
+
+  // <copied>
+  // Initialize drum kit:
+  int num_drums = 0;
+  const az_sound_data_t *drums = NULL;
+  az_get_drum_kit(&num_drums, &drums);
+
+  // Load music:
+  az_reader_t reader;
+  if (!az_file_reader(argv[1], &reader)) {
+    fprintf(stderr, "ERROR: could not open %s\n", argv[1]);
+    return EXIT_FAILURE;
+  }
+  if (!az_read_music(&reader, num_drums, drums, &music)) {
+    fprintf(stderr, "ERROR: failed to parse music.\n");
+    return EXIT_FAILURE;
+  }
+  az_rclose(&reader);
+  atexit(destroy_music);
+  // </copied>
+
+  FILE *file = fopen(argv[2], "w");
+  if (!file) {
+   fprintf(stderr, "ERROR: could not open %s\n", argv[2]);
+   return EXIT_FAILURE;
+   }
+  midi_write_music(&music, data, file);
+
+   fclose(file);
+   midi_free_music_voices_data(data);
+   printf("Done.\n");
+   return EXIT_SUCCESS;
+}