pure sdk for main

2025-08-27 09:51:58 +01:00
parent f0d033f1c9
commit 0571416e7c
3283 changed files with 1577720 additions and 1 deletions
@@ -0,0 +1,72 @@
+#ifndef _ADPCM_CODE_H_
+#define _ADPCM_CODE_H_
+
+#include <stdio.h>
+#include <stdint.h>
+#include <stdlib.h>
+#include "ringbuf.h"
+#include "lowcfe.h"
+
+struct adpcm_channel {
+    int32_t pcmdata;                        // current PCM value
+    int32_t shaping_weight, error;          // for noise shaping
+    int8_t index;                           // current index into step size table
+};
+
+struct adpcm_context {
+    struct adpcm_channel channels [2];
+    int num_channels, sample_rate, config_flags;
+    int16_t *dynamic_shaping_array, last_shaping_weight;
+    int static_shaping_weight;
+};
+
+typedef struct {
+    struct adpcm_context *normal_cnxt;
+    struct adpcm_context *rddancy_cnxt;
+    TYPE_RINGBUF *ringbuf_original;
+    TYPE_RINGBUF *ringbuf_encode;
+    uint32_t rddancy_num;
+}AdpcmEncoder;
+
+typedef struct {
+    uint8_t *rddancy_encbuf; 
+    uint32_t rddancy_num;  
+    uint32_t rddancy_encode_len;
+    uint32_t rddancy_encbuf_num;
+    uint32_t rddancy_encbuf_pos;
+    uint32_t block_size;
+    uint8_t plc_sta;
+    LowcFE_c *lowcfe;
+    int16_t *decode_buf;
+}AdpcmDecoder;
+
+typedef uint64_t rms_error_t;     // best if "double" or "uint64_t", "float" okay in a pinch
+#define MAX_RMS_ERROR UINT64_MAX
+
+#define NOISE_SHAPING_OFF       0       // flat noise (no shaping)
+#define NOISE_SHAPING_STATIC    0x100   // static 1st-order shaping (configurable, highpass default)
+#define NOISE_SHAPING_DYNAMIC   0x200   // dynamically tilted noise based on signal
+
+#define LOOKAHEAD_DEPTH         0x0ff   // depth of search
+#define LOOKAHEAD_EXHAUSTIVE    0x800   // full breadth of search (all branches taken)
+#define LOOKAHEAD_NO_BRANCHING  0x400   // no branches taken (internal use only!)
+
+#define CLIP(data, min, max) \
+if ((data) > (max)) data = max; \
+else if ((data) < (min)) data = min;
+
+#define NIBBLE_TO_DELTA(b,n) ((n)<(1<<((b)-1))?(n)+1:(1<<((b)-1))-1-(n))
+#define DELTA_TO_NIBBLE(b,d) ((d)<0?(1<<((b)-1))-1-(d):(d)-1)
+
+#define NOISE_SHAPING_ENABLED   (NOISE_SHAPING_DYNAMIC | NOISE_SHAPING_STATIC)
+
+#define adpcm_malloc malloc
+#define adpcm_free   free
+
+static void win_average_buffer (float *samples, int sample_count, int half_width);
+int adpcm_encode(AdpcmEncoder *adpcm_enc, uint8_t *outbuf, int *outbufsize, int16_t *inbuf, int inbufcount, int bps);
+int adpcm_decode(AdpcmDecoder *adpcm_dec, int16_t *outbuf, const uint8_t *inbuf, uint32_t inbufsize, int bps);
+AdpcmEncoder *adpcm_encoder_create(int sample_rate, int lookahead, int noise_shaping, int block_size, int redundancy_num);
+AdpcmDecoder *adpcm_decoder_create(int block_size, int redundancy_num);
+int adpcm_decode_plc(AdpcmDecoder *adpcm_dec, int16_t *outbuf);
+#endif