static void compute_allocation_table(CELTMode *mode, int res)
{
int i, j, nBark;
celt_int16_t *allocVectors;
const int C = CHANNELS(mode);
/* Find the number of critical bands supported by our sampling rate */
for (nBark=1;nBark<BARK_BANDS;nBark++)
if (bark_freq[nBark+1]*2 >= mode->Fs)
break;
mode->nbAllocVectors = BITALLOC_SIZE;
allocVectors = celt_alloc(sizeof(celt_int16_t)*(BITALLOC_SIZE*mode->nbEBands));
if (allocVectors==NULL)
return;
/* Compute per-codec-band allocation from per-critical-band matrix */
for (i=0;i<BITALLOC_SIZE;i++)
{
celt_int32_t current = 0;
int eband = 0;
for (j=0;j<nBark;j++)
{
int edge, low;
celt_int32_t alloc;
edge = mode->eBands[eband+1]*res;
alloc = band_allocation[i*BARK_BANDS+j];
alloc = alloc*C*mode->mdctSize;
if (edge < bark_freq[j+1])
{
int num, den;
num = alloc * (edge-bark_freq[j]);
den = bark_freq[j+1]-bark_freq[j];
low = (num+den/2)/den;
allocVectors[i*mode->nbEBands+eband] = (current+low+128)/256;
current=0;
eband++;
current += alloc-low;
} else {
current += alloc;
}
}
allocVectors[i*mode->nbEBands+eband] = (current+128)/256;
}
mode->allocVectors = allocVectors;
}
/* Compute the amplitude (sqrt energy) in each of the bands */
void compute_band_energies(const CELTMode *m, const celt_sig *X, celt_ener *bank, int _C)
{
int i, c, N;
const celt_int16 *eBands = m->eBands;
const int C = CHANNELS(_C);
N = FRAMESIZE(m);
for (c=0;c<C;c++)
{
for (i=0;i<m->nbEBands;i++)
{
int j;
celt_word32 maxval=0;
celt_word32 sum = 0;
j=eBands[i]; do {
maxval = MAX32(maxval, X[j+c*N]);
maxval = MAX32(maxval, -X[j+c*N]);
} while (++j<eBands[i+1]);
if (maxval > 0)
{
int shift = celt_ilog2(maxval)-10;
j=eBands[i]; do {
sum = MAC16_16(sum, EXTRACT16(VSHR32(X[j+c*N],shift)),
EXTRACT16(VSHR32(X[j+c*N],shift)));
} while (++j<eBands[i+1]);
/* We're adding one here to make damn sure we never end up with a pitch vector that's
larger than unity norm */
bank[i+c*m->nbEBands] = EPSILON+VSHR32(EXTEND32(celt_sqrt(sum)),-shift);
} else {
bank[i+c*m->nbEBands] = EPSILON;
}
/*printf ("%f ", bank[i+c*m->nbEBands]);*/
}
}
/*printf ("\n");*/
}
static void compute_allocation_table(CELTMode *mode, int res)
{
int i, j, eband, nBark;
celt_int32_t *allocVectors;
celt_int16_t *allocVectorsS;
celt_int16_t *allocEnergy;
const int C = CHANNELS(mode);
/* Find the number of critical bands supported by our sampling rate */
for (nBark=1;nBark<BARK_BANDS;nBark++)
if (bark_freq[nBark+1]*2 >= mode->Fs)
break;
mode->nbAllocVectors = BITALLOC_SIZE;
allocVectors = celt_alloc(sizeof(celt_int32_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;
for (j=0;j<nBark;j++)
{
int edge, low;
celt_int32_t alloc;
edge = mode->eBands[eband+1]*res;
alloc = band_allocation[i*BARK_BANDS+j];
alloc = alloc*C*mode->mdctSize/256;
if (edge < bark_freq[j+1])
{
int num, den;
num = alloc * (edge-bark_freq[j]);
den = bark_freq[j+1]-bark_freq[j];
low = (num+den/2)/den;
allocVectors[i*mode->nbEBands+eband] += low;
eband++;
allocVectors[i*mode->nbEBands+eband] += alloc-low;
} else {
allocVectors[i*mode->nbEBands+eband] += alloc;
}
}
}
/* Compute fine energy resolution and update the pulse allocation table to subtract that */
for (i=0;i<mode->nbAllocVectors;i++)
{
int sum = 0;
for (j=0;j<mode->nbEBands;j++)
{
int ebits;
int min_bits=0;
if (allocVectors[i*mode->nbEBands+j] > 0)
min_bits = 1;
ebits = IMAX(min_bits , allocVectors[i*mode->nbEBands+j] / (C*(mode->eBands[j+1]-mode->eBands[j])));
if (ebits>7)
ebits=7;
/* The bits used for fine allocation can't be used for pulses */
/* However, we give two "free" bits to all modes to compensate for the fact that some energy
resolution is needed regardless of the frame size. */
if (ebits>1)
allocVectors[i*mode->nbEBands+j] -= C*(ebits-2);
if (allocVectors[i*mode->nbEBands+j] < 0)
allocVectors[i*mode->nbEBands+j] = 0;
sum += ebits;
allocEnergy[i*(mode->nbEBands+1)+j] = ebits;
}
allocEnergy[i*(mode->nbEBands+1)+mode->nbEBands] = sum;
}
mode->energy_alloc = allocEnergy;
allocVectorsS = celt_alloc(sizeof(celt_int16_t)*(BITALLOC_SIZE*mode->nbEBands));
for(i=0;i<(BITALLOC_SIZE*mode->nbEBands);i++)
allocVectorsS[i] = (celt_int16_t)allocVectors[i];
mode->allocVectors = allocVectorsS;
}
} else {
best_num[1] = num;
best_den[1] = Syy;
best_pitch[1] = i;
}
}
}
Syy += SHR32(MULT16_16(y[i+len],y[i+len]),yshift) - SHR32(MULT16_16(y[i],y[i]),yshift);
Syy = MAX32(1, Syy);
}
}
void pitch_downsample(const celt_sig * restrict x, celt_word16 * restrict x_lp, int len, int end, int _C, celt_sig * restrict xmem, celt_word16 * restrict filt_mem)
{
int i;
const int C = CHANNELS(_C);
for (i=1;i<len>>1;i++)
x_lp[i] = SHR32(HALF32(HALF32(x[(2*i-1)*C]+x[(2*i+1)*C])+x[2*i*C]), SIG_SHIFT);
x_lp[0] = SHR32(HALF32(HALF32(*xmem+x[C])+x[0]), SIG_SHIFT);
*xmem = x[end-C];
if (C==2)
{
for (i=1;i<len>>1;i++)
x_lp[i] = SHR32(HALF32(HALF32(x[(2*i-1)*C+1]+x[(2*i+1)*C+1])+x[2*i*C+1]), SIG_SHIFT);
x_lp[0] += SHR32(HALF32(HALF32(x[C+1])+x[1]), SIG_SHIFT);
*xmem += x[end-C+1];
}
#if 0
{
int j;
if (ratio > 2048)
*transient_shift = 3;
else
*transient_shift = 0;
*transient_time = n;
RESTORE_STACK;
return ratio > 20;
}
/** Apply window and compute the MDCT for all sub-frames and
all channels in a frame */
static void compute_mdcts(const CELTMode *mode, int shortBlocks, celt_sig_t * __restrict in, celt_sig_t * __restrict out)
{
const int C = CHANNELS(mode);
if (C==1 && !shortBlocks)
{
const mdct_lookup *lookup = MDCT(mode);
const int overlap = OVERLAP(mode);
mdct_forward(lookup, in, out, mode->window, overlap);
} else if (!shortBlocks) {
const mdct_lookup *lookup = MDCT(mode);
const int overlap = OVERLAP(mode);
const int N = FRAMESIZE(mode);
int c;
VARDECL(celt_word32_t, x);
VARDECL(celt_word32_t, tmp);
SAVE_STACK;
ALLOC(x, N+overlap, celt_word32_t);
ALLOC(tmp, N, celt_word32_t);
bank[i+c*m->nbEBands] = EPSILON+VSHR32(EXTEND32(celt_sqrt(sum)),-shift);
} else {
bank[i+c*m->nbEBands] = EPSILON;
}
/*printf ("%f ", bank[i+c*m->nbEBands]);*/
}
}
/*printf ("\n");*/
}
/* Normalise each band such that the energy is one. */
void normalise_bands(const CELTMode *m, const celt_sig_t * __restrict freq, celt_norm_t * __restrict X, const celt_ener_t *bank)
{
int i, c, N;
const celt_int16_t *eBands = m->eBands;
const int C = CHANNELS(m);
N = FRAMESIZE(m);
for (c=0;c<C;c++)
{
i=0; do {
celt_word16_t g;
int j,shift;
celt_word16_t E;
shift = celt_zlog2(bank[i+c*m->nbEBands])-13;
E = VSHR32(bank[i+c*m->nbEBands], shift);
g = EXTRACT16(celt_rcp(SHL32(E,3)));
j=eBands[i]; do {
X[j*C+c] = MULT16_16_Q15(VSHR32(freq[j+c*N],shift-1),g);
} while (++j<eBands[i+1]);
} while (++i<m->nbEBands);
}
#define NORMAL_BITRATE(val) (val)
#define MIME_TYPE(val) (val)
#define CHANNELS(val) (val)
#define FMTP(val) (val)
#endif
PayloadType payload_type_pcmu8000= {
TYPE( PAYLOAD_AUDIO_CONTINUOUS),
CLOCK_RATE( 8000),
BITS_PER_SAMPLE(8),
ZERO_PATTERN( &offset127),
PATTERN_LENGTH( 1),
NORMAL_BITRATE( 64000),
MIME_TYPE ("PCMU"),
CHANNELS(1)
};
PayloadType payload_type_pcma8000= {
TYPE( PAYLOAD_AUDIO_CONTINUOUS),
CLOCK_RATE(8000),
BITS_PER_SAMPLE(8),
ZERO_PATTERN( &offset0xD5),
PATTERN_LENGTH( 1),
NORMAL_BITRATE( 64000),
MIME_TYPE ("PCMA"),
CHANNELS(1)
};
PayloadType payload_type_pcm8000= {
TYPE( PAYLOAD_AUDIO_CONTINUOUS),
#define SEND_FMTP(val) (val)
#define NO_AVPF {PAYLOAD_TYPE_AVPF_NONE, 0}
#define AVPF(feat, intv) {(feat), (intv)}
#define FLAGS(val) (val)
#endif
PayloadType payload_type_pcmu8000={
TYPE(PAYLOAD_AUDIO_CONTINUOUS),
CLOCK_RATE(8000),
BITS_PER_SAMPLE(8),
ZERO_PATTERN( &offset127),
PATTERN_LENGTH(1),
NORMAL_BITRATE(64000),
MIME_TYPE("PCMU"),
CHANNELS(1),
RECV_FMTP(NULL),
SEND_FMTP(NULL),
NO_AVPF,
FLAGS(0)
};
PayloadType payload_type_pcma8000={
TYPE(PAYLOAD_AUDIO_CONTINUOUS),
CLOCK_RATE(8000),
BITS_PER_SAMPLE(8),
ZERO_PATTERN(&offset0xD5),
PATTERN_LENGTH(1),
NORMAL_BITRATE(64000),
MIME_TYPE("PCMA"),
CHANNELS(1),
