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pband generation wip

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This commit is contained in:
Jean-Marc Valin 2008-02-18 12:16:41 +11:00
parent 81a829574b
commit 2a8c371640
1 changed files with 34 additions and 7 deletions
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41
libcelt/modes.c
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@ -214,13 +214,16 @@ int celt_mode_info(const CELTMode *mode, int request, celt_int32_t *value)
#define MIN_BINS 4 #define MIN_BINS 4
#define BARK_BANDS 25 #define BARK_BANDS 25
const celt_int16_t bark_freq[26] = { const celt_int16_t bark_freq[BARK_BANDS+1] = {
0, 101, 200, 301, 405, 0, 101, 200, 301, 405,
516, 635, 766, 912, 1077, 516, 635, 766, 912, 1077,
1263, 1476, 1720, 2003, 2333, 1263, 1476, 1720, 2003, 2333,
2721, 3184, 3742, 4428, 5285, 2721, 3184, 3742, 4428, 5285,
6376, 7791, 9662, 12181, 15624, 6376, 7791, 9662, 12181, 15624,
20397}; 20397};
const celt_int16_t pitch_freq[PBANDS+1] ={0, 345, 689, 1034, 1378, 2067, 3273, 5340, 6374};
static int *compute_ebands(int Fs, int frame_size, int *nbEBands) static int *compute_ebands(int Fs, int frame_size, int *nbEBands)
{ {
@ -255,29 +258,53 @@ static int *compute_ebands(int Fs, int frame_size, int *nbEBands)
eBands[*nbEBands+1] = frame_size; eBands[*nbEBands+1] = frame_size;
if (eBands[*nbEBands] > eBands[*nbEBands+1]) if (eBands[*nbEBands] > eBands[*nbEBands+1])
eBands[*nbEBands] = eBands[*nbEBands+1]; eBands[*nbEBands] = eBands[*nbEBands+1];
/* FIXME: Remove last band if too small */
for (i=0;i<*nbEBands+2;i++) for (i=0;i<*nbEBands+2;i++)
printf("%d ", eBands[i]); printf("%d ", eBands[i]);
printf ("\n"); printf ("\n");
return eBands; return eBands;
} }
static void compute_pbands(CELTMode *mode, int res)
{
int i;
int *pBands;
pBands=celt_alloc(sizeof(int)*(PBANDS+2));
mode->nbPBands = PBANDS;
for (i=0;i<PBANDS+1;i++)
{
pBands[i] = pitch_freq[i]/res;
if (pBands[i] < mode->eBands[i])
pBands[i] = mode->eBands[i];
}
pBands[PBANDS+1] = mode->eBands[mode->nbEBands+1];
for (i=0;i<mode->nbPBands+2;i++)
printf("%d ", pBands[i]);
printf ("\n");
mode->pBands = pBands;
}
CELTMode *celt_mode_create(int Fs, int channels, int frame_size, int overlap) CELTMode *celt_mode_create(int Fs, int channels, int frame_size, int overlap)
{ {
int i, res, min_width, lin, low, high; int i, res, min_width, lin, low, high;
CELTMode *mode; CELTMode *mode;
res = (Fs+frame_size)/(2*frame_size);
mode = celt_alloc(sizeof(CELTMode)); mode = celt_alloc(sizeof(CELTMode));
mode->overlap = overlap; mode->overlap = overlap;
mode->mdctSize = frame_size; mode->mdctSize = frame_size;
mode->nbMdctBlocks = 1; mode->nbMdctBlocks = 1;
mode->nbChannels = channels; mode->nbChannels = channels;
mode->eBands = compute_ebands(Fs, frame_size, &mode->nbEBands); mode->eBands = compute_ebands(Fs, frame_size, &mode->nbEBands);
compute_pbands(mode, res);
printf ("%d bands\n", mode->nbEBands); printf ("%d bands\n", mode->nbEBands);
} }
/*
int main() /*int main()
{ {
celt_mode_create(32000, 1, 256, 128); celt_mode_create(44100, 1, 256, 128);
} }*/
*/