78 рядки
1.8 KiB
C
78 рядки
1.8 KiB
C
#ifndef cmOnset_h
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#define cmOnset_h
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#ifdef __cplusplus
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extern "C" {
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#endif
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//( { file_desc:"Musical event onset detector." kw:[audio] }
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enum
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{
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kOkOnRC = cmOkRC,
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kDspProcFailOnRC,
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kDspAudioFileFailOnRC,
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kDspTextFileFailOnRC,
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};
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typedef cmRC_t cmOnRC_t;
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typedef cmHandle_t cmOnH_t;
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enum { kNoneFiltId, kSmoothFiltId, kMedianFiltId };
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typedef struct
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{
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double wndMs;
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unsigned hopFact;
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unsigned audioChIdx;
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unsigned wndFrmCnt; // Detection window length
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double preWndMult; // Detection window stretch factor prior to current location.
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double threshold; // Spectal flux detection threshold
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double maxFrqHz; // Ignore frequencies above maxFrqHz during processing.
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double filtCoeff; // smoothing filter coeff (-.7)
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double medFiltWndMs;// median filter window in milliseconds
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unsigned filterId; // kSmoothFiltId || kMedianFiltId
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double preDelayMs; // move each detection preDelayMs backwards in time
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// on the audio output. (compensates for detection delay due to filtering)
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} cmOnsetCfg_t;
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extern cmOnH_t cmOnsetNullHandle;
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cmOnRC_t cmOnsetInitialize( cmCtx_t* c, cmOnH_t* hp );
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cmOnRC_t cmOnsetFinalize( cmOnH_t* hp );
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bool cmOnsetIsValid( cmOnH_t h );
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cmOnRC_t cmOnsetProc(
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cmOnH_t h,
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const cmOnsetCfg_t* cfg,
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const cmChar_t* inAudioFn );
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// Return count of detected onsets.
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unsigned cmOnsetCount( cmOnH_t h );
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// Return location of detected onsets as a sample offset into the file.
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unsigned cmOnsetSampleIndex( cmOnH_t h, unsigned idx );
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unsigned cmOnsetHopSampleCount( cmOnH_t h );
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cmOnRC_t cmOnsetWrite(
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cmOnH_t h,
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const cmChar_t* outAudioFn,
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const cmChar_t* outTextFn);
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cmOnRC_t cmOnsetTest( cmCtx_t* c );
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//)
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#ifdef __cplusplus
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}
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#endif
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#endif
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