cmMidiFile.h/c : Added cmMidiFileInsertMsg() Also rearranged code to isolate
cmMidiTrackMsg_t allocation. These changes are not yet tested.
This commit is contained in:
kevin
parent
21d13a94fd
commit
5cde332add
195
cmMidiFile.c
195
cmMidiFile.c
@ -19,8 +19,6 @@
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#define mfSwap32(v) cmSwap32(v)
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#endif
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typedef struct
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{
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unsigned cnt; // count of track records
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@ -160,10 +158,25 @@ cmMfRC_t _cmMidiFileReadVarLen( _cmMidiFile_t* mfp, unsigned* p )
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return kOkMfRC;
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}
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cmMfRC_t _cmMidiFileAppendTrackMsg( _cmMidiFile_t* mfp, unsigned short trkIdx, unsigned dtick, cmMidiByte_t status, cmMidiTrackMsg_t** trkMsgPtrPtr )
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cmMidiTrackMsg_t* _cmMidiFileAllocMsg( _cmMidiFile_t* mfp, unsigned short trkIdx, unsigned dtick, cmMidiByte_t status )
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{
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cmMidiTrackMsg_t* tmp = (cmMidiTrackMsg_t*)_cmMidiFileMalloc(mfp, sizeof(cmMidiTrackMsg_t) );
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// set the generic track record fields
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tmp->dtick = dtick;
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tmp->status = status;
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tmp->metaId = kInvalidMetaMdId;
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tmp->trkIdx = trkIdx;
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tmp->byteCnt = 0;
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tmp->uid = mfp->nextUid++;
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return tmp;
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}
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cmMfRC_t _cmMidiFileAppendTrackMsg( _cmMidiFile_t* mfp, unsigned short trkIdx, unsigned dtick, cmMidiByte_t status, cmMidiTrackMsg_t** trkMsgPtrPtr )
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{
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cmMidiTrackMsg_t* tmp = _cmMidiFileAllocMsg( mfp, trkIdx, dtick, status );
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// link new record onto track record chain
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if( mfp->trkV[trkIdx].base == NULL )
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mfp->trkV[trkIdx].base = tmp;
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@ -174,12 +187,6 @@ cmMfRC_t _cmMidiFileAppendTrackMsg( _cmMidiFile_t* mfp, unsigned short trkIdx, u
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mfp->trkV[trkIdx].cnt++;
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// set the generic track record fields
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tmp->dtick = dtick;
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tmp->status = status;
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tmp->metaId = kInvalidMetaMdId;
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tmp->trkIdx = trkIdx;
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tmp->byteCnt = 0;
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*trkMsgPtrPtr = tmp;
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return kOkMfRC;
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@ -521,6 +528,43 @@ cmMfRC_t _cmMidiFileClose( _cmMidiFile_t* mfp )
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}
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void _cmMidiFileLinearize( _cmMidiFile_t* mfp )
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{
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unsigned trkIdx,i,j;
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// get the total trk msg count
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mfp->msgN = 0;
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for(trkIdx=0; trkIdx<mfp->trkN; ++trkIdx)
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mfp->msgN += mfp->trkV[ trkIdx ].cnt;
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// allocate the trk msg index vector: msgV[]
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mfp->msgV = cmMemResizeZ(cmMidiTrackMsg_t*, mfp->msgV, mfp->msgN);
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// store a pointer to every trk msg in msgV[]
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for(i=0,j=0; i<mfp->trkN; ++i)
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{
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cmMidiTrackMsg_t* m = mfp->trkV[i].base;
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for(; m!=NULL; m=m->link)
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{
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assert( j < mfp->msgN );
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mfp->msgV[j++] = m;
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}
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}
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// set the atick value in each msg
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_cmMidiFileSetAccumulateTicks(mfp);
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// sort msgV[] in ascending order on atick
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qsort( mfp->msgV, mfp->msgN, sizeof(cmMidiTrackMsg_t*), _cmMidiFileSortFunc );
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// set the amicro value in each msg
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_cmMidiFileSetAbsoluteTime(mfp);
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}
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cmMfRC_t cmMidiFileOpen( cmCtx_t* ctx, cmMidiFileH_t* hPtr, const char* fn )
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{
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@ -528,7 +572,6 @@ cmMfRC_t cmMidiFileOpen( cmCtx_t* ctx, cmMidiFileH_t* hPtr, const char* fn )
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_cmMidiFile_t* mfp = NULL;
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unsigned short trkIdx = 0;
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cmErr_t err;
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unsigned i,j;
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if( cmMidiFileIsValid(*hPtr) )
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if((rc = _cmMidiFileClose(_cmMidiFileHandleToPtr(*hPtr))) != kOkMfRC )
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@ -591,43 +634,12 @@ cmMfRC_t cmMidiFileOpen( cmCtx_t* ctx, cmMidiFileH_t* hPtr, const char* fn )
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}
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}
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// get the total trk msg count
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mfp->msgN = 0;
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for(trkIdx=0; trkIdx<mfp->trkN; ++trkIdx)
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mfp->msgN += mfp->trkV[ trkIdx ].cnt;
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// allocate the trk msg index vector: msgV[]
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mfp->msgV = cmMemAllocZ(cmMidiTrackMsg_t*, mfp->msgN);
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mfp->nextUid = 0;
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// store a pointer to every trk msg in msgV[] and set 'uid'
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for(i=0,j=0; i<mfp->trkN; ++i)
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{
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cmMidiTrackMsg_t* m = mfp->trkV[i].base;
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for(; m!=NULL; m=m->link)
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{
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assert( j < mfp->msgN );
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mfp->msgV[j++] = m;
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m->uid = mfp->nextUid++;
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}
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}
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// store the file name
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mfp->fn = _cmMidiFileMalloc(mfp,strlen(fn)+1);
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assert( mfp->fn != NULL );
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strcpy(mfp->fn,fn);
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// set the atick value in each msg
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_cmMidiFileSetAccumulateTicks(mfp);
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// sort msgV[] in ascending order on atick
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qsort( mfp->msgV, mfp->msgN, sizeof(cmMidiTrackMsg_t*), _cmMidiFileSortFunc );
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// set the amicro value in each msg
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_cmMidiFileSetAbsoluteTime(mfp);
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_cmMidiFileLinearize(mfp);
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hPtr->h = mfp;
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@ -1141,6 +1153,103 @@ cmMfRC_t cmMidiFileSetVelocity( cmMidiFileH_t h, unsigned uid, cmMidiByte_t vel
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return kOkMfRC;
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}
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// Returns NULL if uid is not found or if it the first msg on the track.
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cmMidiTrackMsg_t* _cmMidiFileMsgBeforeUid( _cmMidiFile_t* p, unsigned uid )
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{
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cmMidiTrackMsg_t* m;
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if((m = _cmMidiFileUidToMsg(p,uid)) == NULL )
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return NULL;
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assert( m->trkIdx < p->trkN );
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cmMidiTrackMsg_t* m0 = NULL;
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cmMidiTrackMsg_t* m1 = p->trkV[ m->trkIdx ].base;
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for(; m1!=NULL; m1 = m1->link)
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{
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if( m1->uid == uid )
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break;
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m0 = m1;
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}
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return m0;
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}
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unsigned _cmMidiFileIsMsgFirstOnTrack( _cmMidiFile_t* p, unsigned uid )
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{
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unsigned i;
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for(i=0; i<p->trkN; ++i)
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if( p->trkV[i].base!=NULL && p->trkV[i].base->uid == uid )
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return i;
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return cmInvalidIdx;
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}
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cmMfRC_t cmMidiFileInsertMsg( cmMidiFileH_t h, unsigned uid, int dtick, cmMidiByte_t ch, cmMidiByte_t status, cmMidiByte_t d0, cmMidiByte_t d1 )
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{
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_cmMidiFile_t* mfp = _cmMidiFileHandleToPtr(h);
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assert( mfp != NULL );
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cmMidiTrackMsg_t* ref = NULL;
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unsigned trkIdx = cmInvalidIdx;
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// if dtick is positive ...
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if( dtick >= 0 )
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{
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ref = _cmMidiFileUidToMsg(mfp,uid); // ... then get the ref. msg.
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trkIdx = ref->trkIdx;
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}
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else // if dtick is negative ...
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{
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// ... get get the msg before the ref. msg.
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if((ref = _cmMidiFileMsgBeforeUid(mfp,uid)) == NULL )
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{
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// ... the ref. msg was first in the track so there is no msg before it
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trkIdx = _cmMidiFileIsMsgFirstOnTrack(mfp,uid);
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}
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}
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// verify that the reference msg was found
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if( trkIdx == cmInvalidIdx )
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return cmErrMsg(&mfp->err,kUidNotFoundMfRC,"The UID (%i) reference note could not be located.",uid);
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assert( trkIdx < mfp->trkN );
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// complete the msg setup
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_cmMidiTrack_t* trk = mfp->trkV + trkIdx;
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cmMidiTrackMsg_t* m = _cmMidiFileAllocMsg(mfp, trkIdx, abs(dtick), status );
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cmMidiChMsg_t* c = (cmMidiChMsg_t*)m->u.chMsgPtr; // cast away const
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c->ch = ch;
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c->d0 = d0;
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c->d1 = d1;
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// if 'm' is prior to the first msg in the track
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if( ref == NULL )
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{
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// ... then make 'm' the first msg in the first msg
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m->link = trk->base;
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trk->base = m;
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// 'm' is before ref and the track cannot be empty (because ref is in it) 'm'
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// can never be the last msg in the list
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}
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else // ref is the msg before 'm'
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{
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m->link = ref->link;
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ref->link = m;
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// if ref was the last msg in the trk ...
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if( trk->last == ref )
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trk->last = m; //... then 'm' is now the last msg in the trk
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}
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trk->cnt += 1;
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_cmMidiFileLinearize(mfp);
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return kOkMfRC;
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}
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unsigned cmMidiFileSeekUsecs( cmMidiFileH_t h, unsigned long long offsUSecs, unsigned* msgUsecsPtr, unsigned* microsPerTickPtr )
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{
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_cmMidiFile_t* p;
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@ -161,6 +161,10 @@ extern "C" {
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// Set the velocity of a note-on/off msg identified by 'uid'.
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cmMfRC_t cmMidiFileSetVelocity( cmMidiFileH_t h, unsigned uid, cmMidiByte_t vel );
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// Insert a MIDI message relative to the reference msg identified by 'uid'.
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// If dtick is positive/negative then the new msg is inserted after/before the reference msg.
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cmMfRC_t cmMidiFileInsertMsg( cmMidiFileH_t h, unsigned uid, int dtick, cmMidiByte_t ch, cmMidiByte_t status, cmMidiByte_t d0, cmMidiByte_t d1 );
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// Return a pointer to the first msg at or after 'usecsOffs' or kInvalidIdx if no
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// msg exists after 'usecsOffs'. Note that 'usecOffs' is an offset from the beginning
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// of the file.
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