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samples need to be accumulated at each call of HandleInt

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special processing should start the scheduling
Before fix some signals containing a harmonic of FREQ/16 would producing peaks at
all harmonics of FREQ/16.
This commit is contained in:
bbkiwi 2018-08-19 23:36:30 +12:00
parent bcc3347893
commit 2c8a022aca
1 changed files with 12 additions and 11 deletions
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23
embeddedcommon/DFT32.c
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@ -199,11 +199,17 @@ static void HandleInt( int16_t sample )
Swhichoctaveplace ++; Swhichoctaveplace ++;
Swhichoctaveplace &= BINCYCLE-1; Swhichoctaveplace &= BINCYCLE-1;
for( i = 0; i < OCTAVES;i++ )
{
Saccum_octavebins[i] += sample;
}
if( oct > 128 ) if( oct > 128 )
{ {
//Special: This is when we can update everything. //Special: This is when we can update everything.
//This gets run one out of every 1/(1<<OCTAVES) times. //This gets run once out of every (1<<OCTAVES) times.
//It handles updating part of the DFT. //It handles updating part of the DFT.
//It should happen at the very first call to HandleInit
int32_t * bins = &Sdatspace32B[0]; int32_t * bins = &Sdatspace32B[0];
int32_t * binsOut = &Sdatspace32BOut[0]; int32_t * binsOut = &Sdatspace32BOut[0];
@ -221,12 +227,6 @@ static void HandleInt( int16_t sample )
return; return;
} }
for( i = 0; i < OCTAVES;i++ )
{
Saccum_octavebins[i] += sample;
}
uint16_t * dsA = &Sdatspace32A[oct*FIXBPERO*2]; uint16_t * dsA = &Sdatspace32A[oct*FIXBPERO*2];
int32_t * dsB = &Sdatspace32B[oct*FIXBPERO*2]; int32_t * dsB = &Sdatspace32B[oct*FIXBPERO*2];
@ -252,11 +252,12 @@ int SetupDFTProgressive32()
int j; int j;
Sdonefirstrun = 1; Sdonefirstrun = 1;
Sdo_this_octave[0] = 0xff;
for( i = 0; i < BINCYCLE; i++ ) for( i = 0; i < BINCYCLE-1; i++ )
{ {
// Sdo_this_octave = // Sdo_this_octave =
// 4 3 4 2 4 3 4 ... // 255 4 3 4 2 4 3 4 1 4 3 4 2 4 3 4 0 4 3 4 2 4 3 4 1 4 3 4 2 4 3 4 is case for 5 octaves.
// Initial state is special one, then at step i do octave = Sdo_this_octave with averaged samples from last update of that octave
//search for "first" zero //search for "first" zero
for( j = 0; j <= OCTAVES; j++ ) for( j = 0; j <= OCTAVES; j++ )
@ -271,7 +272,7 @@ int SetupDFTProgressive32()
#endif #endif
return -1; return -1;
} }
Sdo_this_octave[i] = OCTAVES-j-1; Sdo_this_octave[i+1] = OCTAVES-j-1;
} }
return 0; return 0;
} }