Initial public release of the 2024A software.

managed_components/chmorgan__esp-audio-player/audio_mp3.h

@@ -0,0 +1,48 @@
+#pragma once
+
+#include <stdio.h>
+#include "audio_decode_types.h"
+#include "mp3dec.h"
+
+typedef struct {
+    char header[3];     /*!< Always "TAG" */
+    char title[30];     /*!< Audio title */
+    char artist[30];    /*!< Audio artist */
+    char album[30];     /*!< Album name */
+    char year[4];       /*!< Char array of year */
+    char comment[30];   /*!< Extra comment */
+    char genre;         /*!< See "https://en.wikipedia.org/wiki/ID3" */
+} __attribute__((packed)) mp3_id3_header_v1_t;
+
+typedef struct {
+    char header[3];     /*!< Always "ID3" */
+    char ver;           /*!< Version, equals to3 if ID3V2.3 */
+    char revision;      /*!< Revision, should be 0 */
+    char flag;          /*!< Flag byte, use Bit[7..5] only */
+    char size[4];       /*!< TAG size */
+} __attribute__((packed)) mp3_id3_header_v2_t;
+
+typedef struct {
+    // Constants below
+    uint8_t *data_buf;
+
+    /** number of bytes in data_buf */
+    size_t data_buf_size;
+
+    // Values that change at runtime are below
+
+    /**
+     * Total bytes in data_buf,
+     * not the number of bytes remaining after the read_ptr
+     */
+    size_t bytes_in_data_buf;
+
+    /** Pointer to read location in data_buf */
+    uint8_t *read_ptr;
+
+    // set to true if the end of file has been reached
+    bool eof_reached;
+} mp3_instance;
+
+bool is_mp3(FILE *fp);
+DECODE_STATUS decode_mp3(HMP3Decoder mp3_decoder, FILE *fp, decode_data *pData, mp3_instance *pInstance);