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Code Issues Releases Activity

avcodec/atrac3plus: Perform reusing of VLCs during init

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Signed-off-by: Andreas Rheinhardt <andreas.rheinhardt@gmail.com>
This commit is contained in:
Andreas Rheinhardt 2020-10-23 13:06:36 +02:00
parent 38afc6858c
commit 5f8de7b741
1 changed files with 3 additions and 7 deletions
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10
libavcodec/atrac3plus.c
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@ -192,12 +192,12 @@ av_cold void ff_atrac3p_init_vlcs(void)
/* build huffman tables for spectrum decoding */ /* build huffman tables for spectrum decoding */
for (i = 0; i < 112; i++) { for (i = 0; i < 112; i++) {
if (atrac3p_spectra_tabs[i].cb) if (atrac3p_spectra_tabs[i].redirect < 0)
build_canonical_huff(atrac3p_spectra_tabs[i].cb, build_canonical_huff(atrac3p_spectra_tabs[i].cb,
atrac3p_spectra_tabs[i].xlat, atrac3p_spectra_tabs[i].xlat,
&tab_offset, &spec_vlc_tabs[i]); &tab_offset, &spec_vlc_tabs[i]);
else else /* Reuse already initialized VLC table */
spec_vlc_tabs[i].table = 0; spec_vlc_tabs[i] = spec_vlc_tabs[atrac3p_spectra_tabs[i].redirect];
} }
/* build huffman tables for gain data decoding */ /* build huffman tables for gain data decoding */
@ -880,10 +880,6 @@ static void decode_spectrum(GetBitContext *gb, Atrac3pChanUnitCtx *ctx,
tab_index = (chan->table_type * 8 + codetab) * 7 + wordlen - 1; tab_index = (chan->table_type * 8 + codetab) * 7 + wordlen - 1;
tab = &atrac3p_spectra_tabs[tab_index]; tab = &atrac3p_spectra_tabs[tab_index];
/* this allows reusing VLC tables */
if (tab->redirect >= 0)
tab_index = tab->redirect;
decode_qu_spectra(gb, tab, &spec_vlc_tabs[tab_index], decode_qu_spectra(gb, tab, &spec_vlc_tabs[tab_index],
&chan->spectrum[ff_atrac3p_qu_to_spec_pos[qu]], &chan->spectrum[ff_atrac3p_qu_to_spec_pos[qu]],
num_specs); num_specs);