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e3_176_ref/middleware/minimp3/mp3.h

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+/**
+ * @file mp3.h
+ *
+ * Copyright (c) 2020 Semidrive Semiconductor.
+ * All rights reserved.
+ *
+ * Description:
+ *
+ * Revision History:
+ * -----------------
+ */
+#ifndef MP3_H
+#define MP3_H
+
+#include <limits.h>
+#include "minimp3_ex.h"
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+#define DEC_COUNT_INFINITE UINT_MAX
+
+typedef enum {
+    MP3_IO_SOURCE_C_ARRAY = 0,  /* the input stream is in the ram already*/
+    MP3_IO_SOURCE_DISK_PRELOAD, /* the input stream is in file system, but we
+                                   will load the whole file to ram once time */
+    MP3_IO_SOURCE_DISK /* the input stream is in file system, and we will load
+                          the file when needed */
+} io_source_type;
+
+typedef enum {
+    MP3_SAMPLE_FMT_S16 = 0, /* signed 16 bits */
+    MP3_SAMPLE_FMT_FLT,     /* float */
+} sample_format;
+
+typedef struct {
+    io_source_type src_type;
+    void *bit_stream; /* input bs buffer*/
+    uint32_t bit_size;
+    uint32_t bits_offset;
+    uint64_t duration; /* duration with ms */
+    uint32_t repeat_count; /* repeat count */
+
+    mp3dec_ex_t dec_context;
+    mp3dec_io_t io_context;
+} mp3_dec_context;
+
+typedef struct {
+    uint8_t channels;
+    uint32_t bitrate;  /* kbps */
+    uint32_t samples;  /* samples per frame*/
+    uint64_t duration; /* duration with ms */
+    uint32_t samplerate; /* sample rate */
+
+    sample_format format; /* sample format */
+} mp3_frame_info;
+
+int mp3_open_dec(mp3_dec_context *context);
+int mp3_close_dec(mp3_dec_context *context);
+int mp3_dec_seek_frame(mp3_dec_context *context, uint64_t position);
+mp3_dec_context *mp3_init_dec(io_source_type type, void *data, uint32_t size);
+int mp3_dec_set_repeat_count(mp3_dec_context *context, uint32_t count);
+int mp3_dec_get_frame_info(mp3_dec_context *context,
+                           mp3_frame_info *frame_info);
+int mp3_dec_receive_frame(mp3_dec_context *context, mp3d_sample_t *buf,
+                          uint32_t samples);
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif /*MP3_H*/