hpw421初始版本

2026-06-06 16:49:48 +08:00
commit 2339bbfd1f
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+#ifndef __MSBC_DECODER_PORT_H_
+#define __MSBC_DECODER_PORT_H_
+
+#include "oi_codec_sbc.h"
+#include <stdint.h>
+
+
+#define DECODER_DATA_SIZE (SBC_MAX_CHANNELS*SBC_MAX_BLOCKS*SBC_MAX_BANDS * 4 + \
+            SBC_CODEC_MIN_FILTER_BUFFERS*SBC_MAX_BANDS*SBC_MAX_CHANNELS * 2)
+
+#define SBC_FS 120          /* SBC Frame Size */
+#define SBC_N 512           /* 32ms - Window Length for pattern matching */ 
+#define SBC_M 64            /* 4ms - Template for matching */
+#define SBC_LHIST (SBC_N+SBC_FS-1)  /* Length of history buffer required */ 
+#define SBC_RT 36           /* SBC Reconvergence Time (samples) */
+#define SBC_OLAL 16         /* OverLap-Add Length (samples) */
+
+#define mSBC_SYNCWORD 0xad
+
+static float rcos[8] = {
+    0.99148655f,0.92510857f,
+    0.80131732f,0.63683150f, 
+    0.45386582f,0.27713082f, 
+    0.13049554f,0.03376389f,
+};
+
+/* PLC State Information */
+struct sbc_plc_state {
+    int16_t hist[SBC_LHIST+SBC_FS+SBC_RT+SBC_OLAL];
+    int16_t bestlag;
+    int     nbf;
+
+    // summary of processed good and bad frames
+    int good_frames_nr;
+    int bad_frames_nr;
+    int frame_count;
+    int max_consecutive_bad_frames_nr;
+} __attribute__((packed));
+
+
+struct sbc_decoder_state {
+    void *context;
+    struct sbc_plc_state plc_state;
+    void (*handle_pcm_data)(int16_t * data, int num_samples, int num_channels, int sample_rate, void * context);
+    uint32_t bytes_in_frame_buffer;
+    OI_CODEC_SBC_DECODER_CONTEXT decoder_context;
+
+    uint8_t   frame_buffer[SBC_MAX_FRAME_LEN];
+    int16_t   pcm_plc_data[SBC_MAX_CHANNELS * SBC_MAX_BANDS * SBC_MAX_BLOCKS];
+    int16_t   pcm_data[SBC_MAX_CHANNELS * SBC_MAX_BANDS * SBC_MAX_BLOCKS];
+    uint32_t  pcm_bytes;
+    uint32_t decoder_data[(DECODER_DATA_SIZE+3)/4];
+    int       first_good_frame_found;
+    int       h2_sequence_nr;
+    uint16_t  msbc_bad_bytes;
+
+    // summary of processed good, bad and zero frames
+    int good_frames_nr;
+    int bad_frames_nr;
+    int zero_frames_nr;
+};
+
+typedef void (*msbc_decoder_data_cb)(int16_t * data, int num_samples,int num_channels,
+                int sample_rate, void * context);
+
+
+void msbc_decoder_process_msbc_data(int packet_status_flag, uint8_t * buffer, int size);
+int msbc_decoder_init(msbc_decoder_data_cb cb);
+
+#endif