update test suite with new assert_delta

test/assert_delta.c

@@ -0,0 +1,49 @@
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <sndfile.h>
+
+#define BUF_SIZE 8192
+
+// usage: assert_delta file
+// return values:
+// - 0: pass (file is silence)
+// - 1: fail (noise found)
+// - 2: command line error
+// - 3: file open error
+int main(int argc, char** argv) {
+  if (argc<2) return 2;
+
+  SF_INFO si;
+  memset(&si,0,sizeof(SF_INFO));
+  SNDFILE* sf=sf_open(argv[1],SFM_READ,&si);
+  if (sf==NULL) {
+    fprintf(stderr,"open: %s\n",sf_strerror(NULL));
+    return 3;
+  }
+
+  if (si.channels<1) {
+    fprintf(stderr,"invalid channel count\n");
+    return 3;
+  }
+
+  float* buf=malloc(BUF_SIZE*si.channels*sizeof(float));
+
+  sf_count_t totalRead=0;
+  size_t seekPos=0;
+  while ((totalRead=sf_readf_float(sf,buf,BUF_SIZE))!=0) {
+    for (int i=0; i<totalRead*si.channels; i++) {
+      if (buf[i]!=0.0f) {
+        printf("%ld\n",seekPos+(i/si.channels));
+        sf_close(sf);
+        free(buf);
+        return 1;
+      }
+    }
+    seekPos+=BUF_SIZE;
+  }
+
+  sf_close(sf);
+  free(buf);
+  return 0;
+}