484 行
12 KiB
C
484 行
12 KiB
C
#include "cmGlobal.h"
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#include "cmFloatTypes.h"
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#include "cmRpt.h"
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#include "cmErr.h"
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#include "cmCtx.h"
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#include "cmMem.h"
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#include "cmMallocDebug.h"
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#include "cmAudioFile.h"
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#include "cmVectOpsTemplateMain.h"
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#include "cmAudioFileMgr.h"
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struct cmAfm_str;
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typedef struct
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{
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cmSample_t* minV; // minV[summN]
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cmSample_t* maxV; // maxV[summN]
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unsigned summN; // lenght of minV[] and maxV[]
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} cmAfmSummary_t;
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typedef struct cmAfmFile_str
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{
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unsigned id;
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cmAudioFileH_t afH;
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cmAudioFileInfo_t afInfo;
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unsigned smpPerSummPt;
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cmAfmSummary_t* summArray; // summArray[ afInfo.chCnt ]
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cmSample_t* summMem; // memory used by summArray[] vectors
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struct cmAfm_str* p;
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struct cmAfmFile_str* next;
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struct cmAfmFile_str* prev;
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} cmAfmFile_t;
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typedef struct cmAfm_str
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{
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cmErr_t err;
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cmAfmFile_t* list;
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} cmAfm_t;
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cmAfmH_t cmAfmNullHandle = cmSTATIC_NULL_HANDLE;
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cmAfmFileH_t cmAfmFileNullHandle = cmSTATIC_NULL_HANDLE;
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cmAfm_t* _cmAfmHandleToPtr( cmAfmH_t h )
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{
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cmAfm_t* p = (cmAfm_t*)h.h;
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assert(p!=NULL);
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return p;
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}
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cmAfmFile_t* _cmAfmFileHandleToPtr( cmAfmFileH_t fh )
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{
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cmAfmFile_t* fp = (cmAfmFile_t*)fh.h;
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assert(fp!=NULL);
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return fp;
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}
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cmAfmRC_t _cmAfmFileClose( cmAfmFile_t* fp )
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{
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cmAfmRC_t rc = kOkAfmRC;
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if( cmAudioFileIsValid( fp->afH ) )
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if( cmAudioFileDelete( &fp->afH) != kOkAfRC )
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return cmErrMsg(&fp->p->err,kAudioFileFailAfmRC,"Audio file close failed on '%s'.",cmStringNullGuard(cmAudioFileName(fp->afH)));
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if( fp->next != NULL )
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fp->next->prev = fp->prev;
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if( fp->prev != NULL )
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fp->prev->next = fp->next;
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if( fp->p->list == fp )
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fp->p->list = fp->next;
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cmMemFree(fp->summArray);
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cmMemFree(fp->summMem);
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cmMemFree(fp);
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return rc;
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}
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cmAfmRC_t cmAfmFileOpen( cmAfmH_t h, cmAfmFileH_t* fhp, const cmChar_t* audioFn, unsigned id, cmAudioFileInfo_t* afInfo )
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{
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cmAfmRC_t rc;
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cmRC_t afRC;
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if((rc = cmAfmFileClose(fhp)) != kOkAfmRC )
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return rc;
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cmAfmFile_t* fp = cmMemAllocZ(cmAfmFile_t,1);
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fp->p = _cmAfmHandleToPtr(h);
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// open the audio file
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if( cmAudioFileIsValid(fp->afH = cmAudioFileNewOpen(audioFn, &fp->afInfo, &afRC, fp->p->err.rpt )) == false )
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{
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rc = cmErrMsg(&fp->p->err,kAudioFileFailAfmRC,"The audio file '%s' could not be opened.",cmStringNullGuard(audioFn));
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goto errLabel;
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}
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// prepend the new file to the mgr's file list
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if( fp->p->list != NULL )
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fp->p->list->prev = fp;
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fp->next = fp->p->list;
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fp->p->list = fp;
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fp->id = id;
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fhp->h = fp;
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if( afInfo != NULL )
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*afInfo = fp->afInfo;
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errLabel:
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if( rc != kOkAfmRC )
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_cmAfmFileClose(fp);
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return rc;
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}
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cmAfmRC_t cmAfmFileClose( cmAfmFileH_t* fhp )
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{
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cmAfmRC_t rc = kOkAfmRC;
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if( fhp==NULL || cmAfmFileIsValid(*fhp)==false)
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return rc;
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cmAfmFile_t* fp = _cmAfmFileHandleToPtr( *fhp );
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if((rc = _cmAfmFileClose(fp)) != kOkAfmRC )
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return rc;
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fhp->h = NULL;
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return rc;
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}
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bool cmAfmFileIsValid( cmAfmFileH_t fh )
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{ return fh.h != NULL; }
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unsigned cmAfmFileId( cmAfmFileH_t fh )
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{
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cmAfmFile_t* fp = _cmAfmFileHandleToPtr( fh );
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return fp->id;
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}
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cmAudioFileH_t cmAfmFileHandle( cmAfmFileH_t fh )
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{
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cmAfmFile_t* fp = _cmAfmFileHandleToPtr( fh );
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return fp->afH;
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}
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const cmAudioFileInfo_t* cmAfmFileInfo( cmAfmFileH_t fh )
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{
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cmAfmFile_t* fp = _cmAfmFileHandleToPtr( fh );
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return &fp->afInfo;
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}
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cmAfmRC_t cmAfmFileSummarize( cmAfmFileH_t fh, unsigned smpPerSummPt )
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{
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cmAfmFile_t* fp = _cmAfmFileHandleToPtr(fh);
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cmAfmRC_t rc = kOkAfmRC;
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unsigned chCnt = fp->afInfo.chCnt;
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// summary points per channel per vector
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unsigned summN = (unsigned)ceil((double)fp->afInfo.frameCnt / smpPerSummPt );
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// total summary points in all channels and vectors
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unsigned n = chCnt*2*summN;
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// Calc the number of summary points per audio file read
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unsigned ptsPerRd = cmMax(1,cmMax(smpPerSummPt,8192) / smpPerSummPt);
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// Calc the number samples per audio file read as an integer multiple of ptsPerRd.
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unsigned frmCnt = ptsPerRd * smpPerSummPt;
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unsigned actualFrmCnt = 0;
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cmSample_t* chBuf[ chCnt ];
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cmSample_t buf[ frmCnt * chCnt ];
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unsigned i;
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// allocate the summary record array
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if( fp->summArray == NULL )
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fp->summArray = cmMemAllocZ( cmAfmSummary_t, chCnt );
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// allocate the summary vector memory for all channels
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fp->summMem = cmMemResizeZ( cmSample_t, fp->summMem, n);
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fp->smpPerSummPt = smpPerSummPt;
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// setup the summary record array and audio file read buffer
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for(i=0; i<chCnt; ++i)
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{
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// assign memory to the summary vectors
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fp->summArray[i].minV = fp->summMem + i * summN * 2;
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fp->summArray[i].maxV = fp->summArray[i].minV + summN;
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fp->summArray[i].summN = summN;
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// setup the audio file reading channel buffer
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chBuf[i] = buf + (i*frmCnt);
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}
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// read the entire file and calculate the summary vectors
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i = 0;
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do
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{
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unsigned chIdx = 0;
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unsigned j,k;
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// read the next frmCnt samples from the
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if( cmAudioFileReadSample(fp->afH, frmCnt, chIdx, chCnt, chBuf, &actualFrmCnt ) != kOkAfRC )
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{
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rc = cmErrMsg(&fp->p->err,kAudioFileFailAfmRC,"Audio file read failed on '%s'.",cmStringNullGuard(cmAudioFileName(fp->afH)));
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goto errLabel;
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}
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// for each summary point
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for(k=0; k<actualFrmCnt && i<summN; k+=smpPerSummPt,++i)
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{
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// cnt of samples in this summary report
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unsigned m = cmMin(smpPerSummPt,actualFrmCnt-k);
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// for each channel
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for(j=0; j<chCnt; ++j)
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{
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fp->summArray[j].minV[i] = cmVOS_Min(chBuf[j]+k,m,1);
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fp->summArray[j].maxV[i] = cmVOS_Max(chBuf[j]+k,m,1);
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}
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}
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}while( i<summN && actualFrmCnt==frmCnt );
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errLabel:
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return rc;
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}
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// Downsample the summary data to produce the output.
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// There must be 1 or more summary points per output point.
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cmAfmRC_t _cmAfmFileGetDownSummary(
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cmAfmFile_t* fp,
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unsigned chIdx,
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unsigned begSmpIdx,
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unsigned smpCnt,
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cmSample_t* minV,
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cmSample_t* maxV,
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unsigned outCnt )
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{
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assert( smpCnt >= outCnt );
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double smpPerOut = (double)smpCnt/outCnt;
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double summPerOut = smpPerOut/fp->smpPerSummPt;
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unsigned i;
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for(i=0; i<outCnt; ++i)
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{
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double fsbi = (begSmpIdx + (i*smpPerOut)) / fp->smpPerSummPt; // starting summary pt index
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double fsei = fsbi + summPerOut; // endiing summary pt index
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unsigned si = (unsigned)floor(fsbi);
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unsigned sn = (unsigned)floor(fsei - fsbi + 1);
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if( si > fp->summArray[chIdx].summN )
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{
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minV[i] = 0;
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maxV[i] = 0;
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}
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else
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{
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if( si + sn > fp->summArray[chIdx].summN )
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sn = fp->summArray[chIdx].summN - si;
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if( sn == 0 )
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{
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minV[i] = 0;
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maxV[i] = 0;
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}
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else
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{
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minV[i] = cmVOS_Min(fp->summArray[chIdx].minV+si,sn,1);
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maxV[i] = cmVOS_Max(fp->summArray[chIdx].maxV+si,sn,1);
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}
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}
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}
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return kOkAfmRC;
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}
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// Downsample the audio data to produce the output.
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cmAfmRC_t _cmAfmFileGetDownAudio(
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cmAfmFile_t* fp,
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unsigned chIdx,
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unsigned begSmpIdx,
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unsigned smpCnt,
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cmSample_t* minV,
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cmSample_t* maxV,
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unsigned outCnt )
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{
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assert( smpCnt >= outCnt );
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cmAfmRC_t rc = kOkAfmRC;
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unsigned actualFrmCnt = 0;
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unsigned chCnt = 1;
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unsigned i;
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cmSample_t buf[ smpCnt ];
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cmSample_t* chBuf[] = { buf };
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// seek to the read location
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if( cmAudioFileSeek( fp->afH, begSmpIdx ) != kOkAfRC )
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{
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rc = cmErrMsg(&fp->p->err,kAudioFileFailAfmRC,"Audio file seek failed on '%s'.",cmStringNullGuard(cmAudioFileName(fp->afH)));
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goto errLabel;
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}
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// read 'smpCnt' samples into chBuf[][]
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if( cmAudioFileReadSample(fp->afH, smpCnt, chIdx, chCnt, chBuf, &actualFrmCnt ) != kOkAfRC )
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{
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rc = cmErrMsg(&fp->p->err,kAudioFileFailAfmRC,"Audio file read failed on '%s' durnig upsample.",cmStringNullGuard(cmAudioFileName(fp->afH)));
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goto errLabel;
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}
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double smpPerOut = (double)smpCnt/outCnt;
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for(i=0; i<outCnt; ++i)
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{
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double fsbi = i*smpPerOut;
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double fsei = fsbi + smpPerOut;
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unsigned si = (unsigned)floor(fsbi);
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unsigned sn = (unsigned)floor(fsei - fsbi + 1);
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if( si > smpCnt )
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{
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minV[i] = 0;
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maxV[i] = 0;
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}
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if( si + sn > smpCnt )
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sn = smpCnt - si;
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minV[i] = cmVOS_Min(chBuf[chIdx]+si,sn,1);
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maxV[i] = cmVOS_Max(chBuf[chIdx]+si,sn,1);
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}
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errLabel:
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return rc;
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}
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// If there is one or less summary points per output
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cmAfmRC_t _cmAfmFileGetUpSummary(
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cmAfmFile_t* fp,
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unsigned chIdx,
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unsigned begSmpIdx,
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unsigned smpCnt,
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cmSample_t* minV,
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cmSample_t* maxV,
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unsigned outCnt )
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{
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assert( outCnt >= smpCnt );
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cmAfmRC_t rc = kOkAfmRC;
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unsigned actualFrmCnt = 0;
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unsigned chCnt = 1;
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unsigned i;
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cmSample_t buf[ smpCnt ];
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cmSample_t* chBuf[] = { buf };
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if( cmAudioFileSeek( fp->afH, begSmpIdx ) != kOkAfRC )
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{
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rc = cmErrMsg(&fp->p->err,kAudioFileFailAfmRC,"Audio file seek failed on '%s'.",cmStringNullGuard(cmAudioFileName(fp->afH)));
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goto errLabel;
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}
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if( cmAudioFileReadSample(fp->afH, smpCnt, chIdx, chCnt, chBuf, &actualFrmCnt ) != kOkAfRC )
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{
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rc = cmErrMsg(&fp->p->err,kAudioFileFailAfmRC,"Audio file read failed on '%s' durnig upsample.",cmStringNullGuard(cmAudioFileName(fp->afH)));
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goto errLabel;
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}
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for(i=0; i<outCnt; ++i)
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{
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unsigned si = cmMin(smpCnt-1, (unsigned)floor(i * smpCnt / outCnt));
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cmSample_t v = buf[si];
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minV[i] = v;
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maxV[i] = v;
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}
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errLabel:
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return rc;
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}
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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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cmAfmRC_t rc = kOkAfmRC;
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cmAfmFile_t* fp = _cmAfmFileHandleToPtr(fh);
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double maxHiResDurSecs = 20.0;
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if( smpCnt <= outCnt )
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rc = _cmAfmFileGetUpSummary( fp, chIdx, begSmpIdx, smpCnt, minV, maxV, outCnt );
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else
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{
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if( smpCnt/fp->afInfo.srate < maxHiResDurSecs )
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rc = _cmAfmFileGetDownAudio( fp, chIdx, begSmpIdx, smpCnt, minV, maxV, outCnt );
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else
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rc = _cmAfmFileGetDownSummary( fp, chIdx, begSmpIdx, smpCnt, minV, maxV, outCnt );
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}
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return rc;
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}
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//----------------------------------------------------------------------------
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// Audio File Manager
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//----------------------------------------------------------------------------
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cmAfmRC_t _cmAfmDestroy( cmAfm_t* p )
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{
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cmAfmRC_t rc = kOkAfmRC;
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while( p->list != NULL )
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{
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if((rc = _cmAfmFileClose(p->list)) != kOkAfmRC )
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goto errLabel;
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}
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cmMemFree(p);
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errLabel:
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return rc;
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}
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cmAfmRC_t cmAfmCreate( cmCtx_t* ctx, cmAfmH_t* hp )
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{
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cmAfmRC_t rc;
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if((rc = cmAfmDestroy(hp)) != kOkAfmRC )
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return rc;
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cmAfm_t* p = cmMemAllocZ(cmAfm_t,1);
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cmErrSetup(&p->err,&ctx->rpt,"Audio File Mgr");
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hp->h = p;
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return rc;
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}
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cmAfmRC_t cmAfmDestroy( cmAfmH_t* hp )
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{
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cmAfmRC_t rc = kOkAfmRC;
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if( hp==NULL || cmAfmIsValid(*hp)==false)
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return rc;
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cmAfm_t* p = _cmAfmHandleToPtr(*hp);
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if((rc = _cmAfmDestroy(p)) != kOkAfmRC )
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return rc;
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hp->h = NULL;
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return rc;
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}
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bool cmAfmIsValid( cmAfmH_t h )
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{ return h.h != NULL; }
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cmAfmFileH_t cmAfmIdToHandle( cmAfmH_t h, unsigned fileId )
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{
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cmAfm_t* p = _cmAfmHandleToPtr(h);
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cmAfmFile_t* fp = p->list;
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cmAfmFileH_t fh = cmAfmFileNullHandle;
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for(; fp!=NULL; fp=fp->next)
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if( fp->id == fileId )
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{
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fh.h = fp;
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break;
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}
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return fh;
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}
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