81 lines
1.6 KiB
C
81 lines
1.6 KiB
C
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#ifndef DRC_H
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#define DRC_H
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#include <stdint.h>
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#define MAX_DRC_FILTER_CNT_SUPPORT 2
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#define DRC_BAND_NUM (3)
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enum
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{
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DRC_FREQ_NULL = -1,
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DRC_FREQ_50HZ = 1,
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DRC_FREQ_63HZ,
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DRC_FREQ_79HZ,
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DRC_FREQ_100HZ,
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DRC_FREQ_125HZ,
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DRC_FREQ_158HZ,
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DRC_FREQ_199HZ,
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DRC_FREQ_251HZ,
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DRC_FREQ_316HZ,
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DRC_FREQ_398HZ,
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DRC_FREQ_501HZ,
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DRC_FREQ_630HZ,
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DRC_FREQ_794HZ,
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DRC_FREQ_1000HZ,
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DRC_FREQ_1258HZ,
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DRC_FREQ_1584HZ,
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DRC_FREQ_1995HZ,
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DRC_FREQ_2511HZ,
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DRC_FREQ_3162HZ,
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DRC_FREQ_3981HZ,
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DRC_FREQ_5011HZ,
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DRC_FREQ_6309HZ,
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DRC_FREQ_7943HZ,
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DRC_FREQ_10000HZ,
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DRC_FREQ_12589HZ,
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DRC_FREQ_15848HZ,
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DRC_FREQ_19952HZ,
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};
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struct DrcBandConfig
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{
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int threshold;
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float makeup_gain;
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int ratio; // set 1, bypass, reduce mips
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int attack_time;
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int release_time;
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float scale_fact; // invalid
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};
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typedef struct
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{
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int knee;
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int filter_type[MAX_DRC_FILTER_CNT_SUPPORT]; // filter type is choosen from DRC_FREQ_NULL~DRC_FREQ_19952HZ
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int band_num;
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int look_ahead_time;
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struct DrcBandConfig band_settings[DRC_BAND_NUM];
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} DrcConfig;
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struct DrcState_;
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typedef struct DrcState_ DrcState;
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#ifdef __cplusplus
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extern "C" {
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#endif
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DrcState *drc_create(int sample_rate, int frame_size, int sample_bit, int ch_num, const DrcConfig *config);
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int32_t drc_destroy(DrcState *st);
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int32_t drc_set_config(DrcState *st, const DrcConfig *config);
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int32_t drc_process(DrcState *st, uint8_t *buf, uint32_t len);
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#ifdef __cplusplus
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}
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#endif
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#endif
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