pattern loading

C/loaders.cpp

@@ -1,7 +1,8 @@
 
 int loadBank(int bank) {
 
-  memset(_sample, 0, sizeof(Mix_Chunk*) * NUM_WAVEFORMS);
+  printf("\nLoading bank %d ...\n", bank);
+  memset(samples, 0, sizeof(Mix_Chunk*) * NUM_WAVEFORMS);
 
   int result = Mix_OpenAudio(44100, AUDIO_S16SYS, 2, 512);
   if( result < 0 ) {
@@ -20,11 +21,70 @@ int loadBank(int bank) {
   for( int i = 0; i < NUM_WAVEFORMS; i++ ) {
     sprintf(waveFileName, "banks/BANK%d/%d.wav", bank, i+1);
 
-    _sample[i] = Mix_LoadWAV(waveFileName);
-    if( _sample[i] == NULL ) {
+    samples[i] = Mix_LoadWAV(waveFileName);
+    if( samples[i] == NULL ) {
       fprintf(stderr, "Unable to load wave file: %s\n", waveFileName);
     }
   }
 
   return true;
 }
+
+
+void loadPattern(int pattern) {
+  printf("\nLoading pattern %d ...\n", pattern);
+
+  FILE *fp;
+  char *line = NULL;
+  size_t len = 0;
+  ssize_t read;
+  int lineCount = 0;
+  char patternFile[16];
+
+  int bank = 0;
+  int cols = 0;
+  int rows = 0;
+
+  int patternArray[10][32];
+
+  sprintf(patternFile, "patterns/pattern%d", pattern);
+  fp = fopen(patternFile, "r");
+  if(fp == NULL) {exit(EXIT_FAILURE);}
+
+  while ((read = getline(&line, &len, fp)) != -1) {
+    //printf("Retrieved line of length %zu:\n", read);
+
+    if(lineCount == 0) { bank = line[10]-'0'; }
+    if(lineCount == 1) { rows = line[10]-'0'; }
+
+    if(lineCount > 1) {
+      if(lineCount == 2) {
+        cols = read-1;
+      }
+
+      for(int i=0; i<cols; i++) {
+        patternArray[lineCount-2][i] = line[i];
+      }
+
+    }
+
+    lineCount++;
+  }
+
+  printf("Pattern: %d\nBank: %d\nColumns: %d\nRows: %d\n", pattern, bank, cols, rows);
+
+  for(int i=0; i<rows; i++) {
+    //printf("\nCol %d: ", i);
+    for(int y=0; y<cols; y++) {
+      printf("%d ", patternArray[i][y]-'0');
+    }
+    printf("\n");
+  }
+
+  printf("\n");
+
+  fclose(fp);
+  if(line) {free(line);}
+
+  loadBank(bank);
+}

C/main.cpp

@@ -1,15 +1,16 @@
 #include <stdio.h>
-#include "SDL.h"
-#include "SDL_mixer.h"
-#include "SDL_image.h"
 #include <unistd.h>
 #include <syslog.h>
 #include <string.h>
 #include <math.h>
 
-#define NUM_WAVEFORMS 6
+#include "SDL.h"
+#include "SDL_mixer.h"
+#include "SDL_image.h"
+
+#define NUM_WAVEFORMS 4
 
-Mix_Chunk* _sample[NUM_WAVEFORMS];
+Mix_Chunk* samples[NUM_WAVEFORMS];
 
 #include "players.cpp"
 #include "loaders.cpp"
@@ -33,16 +34,17 @@ int main(int argc, char** argv) {
   SDL_SetRenderDrawColor(renderer, 100, 100, 100, 255);
   SDL_Delay(1000);
 
-  if(loadBank(1) == false) {return -1;}
-
+  SDL_RenderClear(renderer);
+  SDL_RenderPresent(renderer);
   SDL_Event event;
 
+  if(loadBank(1) == false) {return -1;}
+  loadPattern(2);
+
+  /*
   while (!done) {
     bool gotEvent = SDL_PollEvent(&event);
 
-    SDL_RenderClear(renderer);
-    SDL_RenderPresent(renderer);
-
     while (!done && gotEvent) {
       switch (event.type) {
         case SDL_KEYDOWN:
@@ -91,10 +93,10 @@ int main(int argc, char** argv) {
 
     playStep(play, &timer, &step);
   }
-
+  */
 
   for( int i = 0; i < NUM_WAVEFORMS; i++ ) {
-    Mix_FreeChunk(_sample[i]);
+    Mix_FreeChunk(samples[i]);
   }
 
   Mix_CloseAudio();

C/patterns/pattern1

@@ -0,0 +1,6 @@
+bank      1
+rows      4
+00011010
+01100010
+00011000
+10000000

C/patterns/pattern2

@@ -0,0 +1,6 @@
+bank      2
+rows      4
+10000010
+01100010
+00011000
+10001001

C/players.cpp

@@ -6,10 +6,10 @@ void playStep(bool play, int *timer, int *step) {
   if(*timer == 0) {
     printf("%d\n", *timer);
 
-    Mix_PlayChannel(-1, _sample[1], 0);
+    Mix_PlayChannel(-1, samples[1], 0);
   }
 }
 
 void playSample(int sample) {
-  Mix_PlayChannel(-1, _sample[sample-1], 0);
+  Mix_PlayChannel(-1, samples[sample-1], 0);
 }