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avcodec/hcadec: small refactoring

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This commit is contained in:
Paul B Mahol 2023-09-09 12:00:42 +02:00
parent dcd92aa01a
commit e6923e06c2
1 changed files with 11 additions and 5 deletions
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16
libavcodec/hcadec.c
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@ -31,7 +31,8 @@
#define MAX_CHANNELS 16
typedef struct ChannelContext {
float base[128];
DECLARE_ALIGNED(32, float, base)[128];
DECLARE_ALIGNED(32, float, factors)[128];
DECLARE_ALIGNED(32, float, imdct_in)[128];
DECLARE_ALIGNED(32, float, imdct_out)[128];
DECLARE_ALIGNED(32, float, imdct_prev)[128];
@ -294,8 +295,8 @@ static void apply_intensity_stereo(HCAContext *s, ChannelContext *ch1, ChannelCo
return;
for (int i = 0; i < band_count; i++) {
*(c2++) = *c1 * ratio_r;
*(c1++) *= ratio_l;
c2[i] = c1[i] * ratio_r;
c1[i] *= ratio_l;
}
}
@ -320,6 +321,10 @@ static void reconstruct_hfr(HCAContext *s, ChannelContext *ch,
static void dequantize_coefficients(HCAContext *c, ChannelContext *ch,
GetBitContext *gb)
{
const float *base = ch->base;
float *factors = ch->factors;
float *out = ch->imdct_in;
for (int i = 0; i < ch->count; i++) {
unsigned scale = ch->scale[i];
int nb_bits = max_bits_table[scale];
@ -336,10 +341,11 @@ static void dequantize_coefficients(HCAContext *c, ChannelContext *ch,
skip_bits_long(gb, quant_spectrum_bits[value] - nb_bits);
factor = quant_spectrum_value[value];
}
ch->imdct_in[i] = factor * ch->base[i];
factors[i] = factor;
}
memset(ch->imdct_in + ch->count, 0, sizeof(ch->imdct_in) - ch->count * sizeof(ch->imdct_in[0]));
memset(factors + ch->count, 0, 512 - ch->count * sizeof(*factors));
c->fdsp->vector_fmul(out, factors, base, 128);
}
static void unpack(HCAContext *c, ChannelContext *ch,