Diff: WAV_Reader.h

Revision:

1:c1046d91bff7

Child:

2:18fdd269b401

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/WAV_Reader.h	Fri Feb 24 15:18:01 2017 +0000
@@ -0,0 +1,67 @@
+/*
+ * WAV_Reader.h
+ *
+ *  Created on: 23 Feb 2017
+ *      Author: ML15AAF
+ */
+
+#ifndef WAV_READER_H_
+#define WAV_READER_H_
+
+#include <mbed.h>
+
+/* ERROR CONST */
+/* FILE OPEN */
+#define WAV_READER_FO_NULL_PTR      -1
+#define WAV_READER_FO_NOT_RIFF      -2
+#define WAV_READER_FO_NOT_WAV       -3
+#define WAV_READER_FO_NO_FMT        -4
+#define WAV_READER_FO_NO_DATA       -5
+#define WAV_READER_FO_NO_DATA_FMT   -9
+
+class WAV_Reader {
+
+    public:
+
+        struct Config {
+                uint16_t format_tag;
+                uint16_t channels;
+                uint32_t samples_per_sec;
+                uint32_t avg_bytes_per_sec;
+                uint16_t block_align;
+                uint16_t bits_per_sample;
+                uint32_t data_pos;
+                uint32_t data_length;
+                uint32_t file_size;
+
+                Config();
+        };
+
+        WAV_Reader();
+        int open(FILE **filepp);
+        int read(char buff[], int len);
+        void reset();
+        void seek(int num, int start = -1);
+        bool loop();
+        void loop(bool enable);
+        uint16_t channels();
+        uint32_t samples_per_sec();
+        uint16_t block_align();
+        uint16_t bits_per_sample();
+
+    private:
+        FILE ** fpp;
+        int _current_pos;
+        bool _loop;
+
+        Config config;
+
+        int read_bytes(FILE *fp, char* out, int len_to_read, int start_off = 0);
+        bool check_bytes(FILE *fp, char* check, int len, int start = 0);
+        uint32_t read_num(FILE *fp, int len, int start = 0);
+        uint32_t get_num(char input[], int byte_count);
+        int find_chunk(FILE *fp, char* check, int max_len, int start = 0);
+        int move_read_position(int count, int start);
+};
+
+#endif /* WAV_READER_H_ */