39 lines
957 B
C
39 lines
957 B
C
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#ifndef COEFF_CALCULATE_API_H
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#define COEFF_CALCULATE_API_H
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int get_coeff_calculate_buf(int section);
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void coeff_calculate_init(void *ptr, int section, int fs);
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void bpf_filts(void *ptr, int *in_buf_fc, int *qf);
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typedef struct spectrum {
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int section;
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int fs;
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int *SOSMatrix;
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int pool[0];
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} spec;
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#if 0
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coeff_calculate.a库说明：
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该库根据给定的参数计算带通滤波器的系数；
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调用流程：
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bufsize = int get_coeff_calculate_buf(section); //获取buf大小
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section：段数（可根据并联的需要进行配置）
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workbuf = malloc(bufsize); //申请内存
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coeff_calculate_init(workbuf, section, fs); //初始化
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fs:
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采样频率
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bpf_filts(workbuf, in_buf, qf); //运行
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in_buf ：输入的fc数据（定点24bit），与段数匹配
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qf：输入的q因子数据（定点24bit），与段数匹配
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输出：每段5个系数（定点22bit）对应br23模型，系数存储在缓存SOSMatrix中；
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#endif
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#endif
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