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Merged compute_allocation_table() and compute_energy_allocation_table()

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Jean-Marc Valin 2008-08-02 22:25:19 -04:00
parent 9eba823cf7
commit 36e6e01ada
1 changed files with 22 additions and 38 deletions
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60
libcelt/modes.c
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@ -200,10 +200,13 @@ static void compute_pbands(CELTMode *mode, int res)
static void compute_allocation_table(CELTMode *mode, int res)
{
int i, j, eband;
celt_int16_t *allocVectors;
celt_int16_t *allocVectors, *allocEnergy;
const int C = CHANNELS(mode);
mode->nbAllocVectors = BITALLOC_SIZE;
allocVectors = celt_alloc(sizeof(celt_int16_t)*(BITALLOC_SIZE*mode->nbEBands));
allocEnergy = celt_alloc(sizeof(celt_int16_t)*(mode->nbAllocVectors*(mode->nbEBands+1)));
/* Compute per-codec-band allocation from per-critical-band matrix */
for (i=0;i<BITALLOC_SIZE;i++)
{
eband = 0;
@ -213,10 +216,7 @@ static void compute_allocation_table(CELTMode *mode, int res)
celt_int32_t alloc;
edge = mode->eBands[eband+1]*res;
alloc = band_allocation[i*BARK_BANDS+j];
if (mode->nbChannels == 2)
alloc = alloc*3*mode->mdctSize/512;
else
alloc = alloc*mode->mdctSize/256;
alloc = alloc*C*mode->mdctSize/256;
if (edge < bark_freq[j+1])
{
int num, den;
@ -231,50 +231,35 @@ static void compute_allocation_table(CELTMode *mode, int res)
}
}
}
/*for (i=0;i<BITALLOC_SIZE;i++)
{
for (j=0;j<mode->nbEBands;j++)
printf ("%2d ", allocVectors[i*mode->nbEBands+j]);
printf ("\n");
}*/
mode->allocVectors = allocVectors;
}
#endif /* STATIC_MODES */
static void compute_energy_allocation_table(CELTMode *mode)
{
int i, j;
celt_int16_t *alloc;
const int C = CHANNELS(mode);
alloc = celt_alloc(sizeof(celt_int16_t)*(mode->nbAllocVectors*(mode->nbEBands+1)));
/* Compute fine energy resolution and update the pulse allocation table to subtract that */
for (i=0;i<mode->nbAllocVectors;i++)
{
int sum = 0;
int min_bits = 1;
if (mode->allocVectors[i*mode->nbEBands]>12)
if (allocVectors[i*mode->nbEBands]>12)
min_bits = 2;
if (mode->allocVectors[i*mode->nbEBands]>24)
if (allocVectors[i*mode->nbEBands]>24)
min_bits = 3;
for (j=0;j<mode->nbEBands;j++)
{
alloc[i*(mode->nbEBands+1)+j] = mode->allocVectors[i*mode->nbEBands+j]
allocEnergy[i*(mode->nbEBands+1)+j] = allocVectors[i*mode->nbEBands+j]
/ (C*(mode->eBands[j+1]-mode->eBands[j]));
if (alloc[i*(mode->nbEBands+1)+j]<min_bits)
alloc[i*(mode->nbEBands+1)+j] = min_bits;
if (alloc[i*(mode->nbEBands+1)+j]>7)
alloc[i*(mode->nbEBands+1)+j] = 7;
sum += alloc[i*(mode->nbEBands+1)+j];
/*printf ("%d ", alloc[i*(mode->nbEBands+1)+j]);*/
/*printf ("%f ", mode->allocVectors[i*mode->nbEBands+j]*1.f/(mode->eBands[j+1]-mode->eBands[j]-1));*/
if (allocEnergy[i*(mode->nbEBands+1)+j]<min_bits)
allocEnergy[i*(mode->nbEBands+1)+j] = min_bits;
if (allocEnergy[i*(mode->nbEBands+1)+j]>7)
allocEnergy[i*(mode->nbEBands+1)+j] = 7;
/* The bits used for fine allocation can't be used for pulses */
allocVectors[i*mode->nbEBands+j] -= C*allocEnergy[i*(mode->nbEBands+1)+j];
sum += allocEnergy[i*(mode->nbEBands+1)+j];
}
alloc[i*(mode->nbEBands+1)+mode->nbEBands] = sum;
/*printf ("\n");*/
allocEnergy[i*(mode->nbEBands+1)+mode->nbEBands] = sum;
}
mode->energy_alloc = alloc;
mode->energy_alloc = allocEnergy;
mode->allocVectors = allocVectors;
}
#endif /* STATIC_MODES */
CELTMode *celt_mode_create(celt_int32_t Fs, int channels, int frame_size, int *error)
{
int i;
@ -399,7 +384,6 @@ CELTMode *celt_mode_create(celt_int32_t Fs, int channels, int frame_size, int *e
mode->shortWindow = mode->window;
mode->prob = quant_prob_alloc(mode);
compute_energy_allocation_table(mode);
if (mode->nbChannels>=2)
mode->bits_stereo = (const celt_int16_t **)compute_alloc_cache(mode, mode->nbChannels);