of hardcoding 200 everywhere.
#define SCALE_MAX_POS 255 ///< scalefactor index maximum value
#define SCALE_MAX_DIFF 60 ///< maximum scalefactor difference allowed by standard
#define SCALE_DIFF_ZERO 60 ///< codebook index corresponding to zero scalefactor indices difference
+#define POW_SF2_ZERO 200 ///< ff_aac_pow2sf_tab index corresponding to pow(2, 0);
/**
* Long Term Prediction
#include "libavcodec/aac_tables.h"
#else
#include "libavutil/mathematics.h"
+#include "libavcodec/aac.h"
float ff_aac_pow2sf_tab[428];
void ff_aac_tableinit(void)
{
int i;
for (i = 0; i < 428; i++)
- ff_aac_pow2sf_tab[i] = pow(2, (i - 200) / 4.);
+ ff_aac_pow2sf_tab[i] = pow(2, (i - POW_SF2_ZERO) / 4.);
}
#endif /* CONFIG_HARDCODED_TABLES */
int *bits, int BT_ZERO, int BT_UNSIGNED,
int BT_PAIR, int BT_ESC)
{
- const float IQ = ff_aac_pow2sf_tab[200 + scale_idx - SCALE_ONE_POS + SCALE_DIV_512];
- const float Q = ff_aac_pow2sf_tab[200 - scale_idx + SCALE_ONE_POS - SCALE_DIV_512];
+ const float IQ = ff_aac_pow2sf_tab[POW_SF2_ZERO + scale_idx - SCALE_ONE_POS + SCALE_DIV_512];
+ const float Q = ff_aac_pow2sf_tab[POW_SF2_ZERO - scale_idx + SCALE_ONE_POS - SCALE_DIV_512];
const float CLIPPED_ESCAPE = 165140.0f*IQ;
int i, j;
float cost = 0;
}
static int find_min_book(float maxval, int sf) {
- float Q = ff_aac_pow2sf_tab[200 - sf + SCALE_ONE_POS - SCALE_DIV_512];
+ float Q = ff_aac_pow2sf_tab[POW_SF2_ZERO - sf + SCALE_ONE_POS - SCALE_DIV_512];
float Q34 = sqrtf(Q * sqrtf(Q));
int qmaxval, cb;
qmaxval = maxval * Q34 + 0.4054f;
dist -= b;
}
dist *= 1.0f / 512.0f / lambda;
- quant_max = quant(maxq[w*16+g], ff_aac_pow2sf_tab[200 - scf + SCALE_ONE_POS - SCALE_DIV_512]);
+ quant_max = quant(maxq[w*16+g], ff_aac_pow2sf_tab[POW_SF2_ZERO - scf + SCALE_ONE_POS - SCALE_DIV_512]);
if (quant_max >= 8191) { // too much, return to the previous quantizer
sce->sf_idx[w*16+g] = prev_scf;
break;
"audible artifact, there may be a bug in the "
"decoder. ", offset[2], clipped_offset);
}
- sf[idx] = ff_aac_pow2sf_tab[-clipped_offset + 200];
+ sf[idx] = ff_aac_pow2sf_tab[-clipped_offset + POW_SF2_ZERO];
}
} else if (band_type[idx] == NOISE_BT) {
for (; i < run_end; i++, idx++) {
"artifact, there may be a bug in the decoder. ",
offset[1], clipped_offset);
}
- sf[idx] = -ff_aac_pow2sf_tab[clipped_offset + sf_offset + 100];
+ sf[idx] = -ff_aac_pow2sf_tab[clipped_offset + sf_offset - 100 + POW_SF2_ZERO];
}
} else {
for (; i < run_end; i++, idx++) {
"%s (%d) out of range.\n", sf_str[0], offset[0]);
return -1;
}
- sf[idx] = -ff_aac_pow2sf_tab[ offset[0] + sf_offset];
+ sf[idx] = -ff_aac_pow2sf_tab[offset[0] + sf_offset - 200 + POW_SF2_ZERO];
}
}
}