71 строка
2.5 KiB
C
71 строка
2.5 KiB
C
#ifndef cmAudioFileMgr_h
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#define cmAudioFileMgr_h
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#ifdef __cplusplus
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extern "C" {
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#endif
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//( { file_desc:"Manages a collection of audio files and maintains downsampled copies of their signals." kw:[audio file] }
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enum
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{
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kOkAfmRC = cmOkRC,
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kAudioFileFailAfmRC
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};
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typedef cmHandle_t cmAfmH_t;
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typedef cmHandle_t cmAfmFileH_t;
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typedef cmRC_t cmAfmRC_t;
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extern cmAfmH_t cmAfmNullHandle;
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extern cmAfmFileH_t cmAfmFileNullHandle;
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//----------------------------------------------------------------------------
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// Audio Files
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//----------------------------------------------------------------------------
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cmAfmRC_t cmAfmFileOpen( cmAfmH_t h, cmAfmFileH_t* fhp, const cmChar_t* audioFn, unsigned fileId, cmAudioFileInfo_t* afInfo );
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cmAfmRC_t cmAfmFileClose( cmAfmFileH_t* fhp );
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bool cmAfmFileIsValid( cmAfmFileH_t fh );
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// Return the application supplied file id associated with this file.
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// This value was set by the 'fileId' argument to cmAfmFileOpen().
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unsigned cmAfmFileId( cmAfmFileH_t fh );
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// Return the file handle associated with this file.
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cmAudioFileH_t cmAfmFileHandle( cmAfmFileH_t fh );
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// Return a pointer to the information record associated with this file.
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const cmAudioFileInfo_t* cmAfmFileInfo( cmAfmFileH_t fh );
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// Summarize min and max values of the downSampled audio file.
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// The summary is kept in an internal cache which is used to
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// optimize the time required to complete later calls to cmAfmFileGetSummary().
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// 'downSampleFactor' is the count of samples per summary point.
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cmAfmRC_t cmAfmFileSummarize( cmAfmFileH_t fh, unsigned downSampleFactor );
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// Return a summary of the samples in the range audio file range
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// begSmpIdx:begSmpIdx+smpCnt-1 reduced or expanded to 'outCnt' values
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// in minV[outCnt] and maxV[outCnt].
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// If 'outCnt' is equal to 'smpCnt' then the actual sample values are returned.
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cmAfmRC_t cmAfmFileGetSummary( cmAfmFileH_t fh, unsigned chIdx, unsigned begSmpIdx, unsigned smpCnt, cmSample_t* minV, cmSample_t* maxV, unsigned outCnt );
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//----------------------------------------------------------------------------
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// Audio File Manager
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//----------------------------------------------------------------------------
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cmAfmRC_t cmAfmCreate( cmCtx_t* ctx, cmAfmH_t* hp );
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cmAfmRC_t cmAfmDestroy( cmAfmH_t* hp );
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bool cmAfmIsValid( cmAfmH_t h );
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cmAfmFileH_t cmAfmIdToHandle( cmAfmH_t h, unsigned fileId );
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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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