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avcodec/aac/aacdec_usac: Simplify decode_usac_scale_factors()

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Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
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Michael Niedermayer
2025-02-08 00:18:24 +01:00
parent d1be369af6
commit 41cd72d76e
1 changed files with 2 additions and 9 deletions
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11
libavcodec/aac/aacdec_usac.c
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@@ -567,15 +567,8 @@ static int decode_usac_scale_factors(AACDecContext *ac,
int offset_sf = global_gain;
for (int g = 0; g < ics->num_window_groups; g++) {
for (int sfb = 0; sfb < ics->max_sfb; sfb++) {
/* First coefficient is just the global gain */
if (!g && !sfb) {
/* The cannonical representation of quantized scalefactors
* in the spec is with 100 subtracted. */
sce->sfo[0] = offset_sf - 100;
continue;
}
offset_sf += get_vlc2(gb, ff_vlc_scalefactors, 7, 3) - SCALE_DIFF_ZERO;
if (g || sfb)
offset_sf += get_vlc2(gb, ff_vlc_scalefactors, 7, 3) - SCALE_DIFF_ZERO;
if (offset_sf > 255U) {
av_log(ac->avctx, AV_LOG_ERROR,
"Scalefactor (%d) out of range.\n", offset_sf);