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Code Issues Releases Activity

Make VLC tables in DCA decoder use INIT_VLC_USE_NEW_STATIC

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Originally committed as revision 18643 to svn://svn.ffmpeg.org/ffmpeg/trunk
This commit is contained in:
Kostya Shishkov 2009-04-21 17:37:03 +00:00
parent a456df258e
commit 0cfa85dd9f
1 changed files with 30 additions and 8 deletions
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38
libavcodec/dca.c
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@ -252,42 +252,64 @@ typedef struct {
MDCTContext imdct; MDCTContext imdct;
} DCAContext; } DCAContext;
static const uint16_t dca_vlc_offs[] = {
0, 512, 640, 768, 1282, 1794, 2436, 3080, 3770, 4454, 5364,
5372, 5380, 5388, 5392, 5396, 5412, 5420, 5428, 5460, 5492, 5508,
5572, 5604, 5668, 5796, 5860, 5892, 6412, 6668, 6796, 7308, 7564,
7820, 8076, 8620, 9132, 9388, 9910, 10166, 10680, 11196, 11726, 12240,
12752, 13298, 13810, 14326, 14840, 15500, 16022, 16540, 17158, 17678, 18264,
18796, 19352, 19926, 20468, 21472, 22398, 23014, 23622,
};
static av_cold void dca_init_vlcs(void) static av_cold void dca_init_vlcs(void)
{ {
static int vlcs_initialized = 0; static int vlcs_initialized = 0;
int i, j; int i, j, c = 14;
static VLC_TYPE dca_table[23622][2];
if (vlcs_initialized) if (vlcs_initialized)
return; return;
dca_bitalloc_index.offset = 1; dca_bitalloc_index.offset = 1;
dca_bitalloc_index.wrap = 2; dca_bitalloc_index.wrap = 2;
for (i = 0; i < 5; i++) for (i = 0; i < 5; i++) {
dca_bitalloc_index.vlc[i].table = &dca_table[dca_vlc_offs[i]];
dca_bitalloc_index.vlc[i].table_allocated = dca_vlc_offs[i + 1] - dca_vlc_offs[i];
init_vlc(&dca_bitalloc_index.vlc[i], bitalloc_12_vlc_bits[i], 12, init_vlc(&dca_bitalloc_index.vlc[i], bitalloc_12_vlc_bits[i], 12,
bitalloc_12_bits[i], 1, 1, bitalloc_12_bits[i], 1, 1,
bitalloc_12_codes[i], 2, 2, INIT_VLC_USE_STATIC); bitalloc_12_codes[i], 2, 2, INIT_VLC_USE_NEW_STATIC);
}
dca_scalefactor.offset = -64; dca_scalefactor.offset = -64;
dca_scalefactor.wrap = 2; dca_scalefactor.wrap = 2;
for (i = 0; i < 5; i++) for (i = 0; i < 5; i++) {
dca_scalefactor.vlc[i].table = &dca_table[dca_vlc_offs[i + 5]];
dca_scalefactor.vlc[i].table_allocated = dca_vlc_offs[i + 6] - dca_vlc_offs[i + 5];
init_vlc(&dca_scalefactor.vlc[i], SCALES_VLC_BITS, 129, init_vlc(&dca_scalefactor.vlc[i], SCALES_VLC_BITS, 129,
scales_bits[i], 1, 1, scales_bits[i], 1, 1,
scales_codes[i], 2, 2, INIT_VLC_USE_STATIC); scales_codes[i], 2, 2, INIT_VLC_USE_NEW_STATIC);
}
dca_tmode.offset = 0; dca_tmode.offset = 0;
dca_tmode.wrap = 1; dca_tmode.wrap = 1;
for (i = 0; i < 4; i++) for (i = 0; i < 4; i++) {
dca_tmode.vlc[i].table = &dca_table[dca_vlc_offs[i + 10]];
dca_tmode.vlc[i].table_allocated = dca_vlc_offs[i + 11] - dca_vlc_offs[i + 10];
init_vlc(&dca_tmode.vlc[i], tmode_vlc_bits[i], 4, init_vlc(&dca_tmode.vlc[i], tmode_vlc_bits[i], 4,
tmode_bits[i], 1, 1, tmode_bits[i], 1, 1,
tmode_codes[i], 2, 2, INIT_VLC_USE_STATIC); tmode_codes[i], 2, 2, INIT_VLC_USE_NEW_STATIC);
}
for(i = 0; i < 10; i++) for(i = 0; i < 10; i++)
for(j = 0; j < 7; j++){ for(j = 0; j < 7; j++){
if(!bitalloc_codes[i][j]) break; if(!bitalloc_codes[i][j]) break;
dca_smpl_bitalloc[i+1].offset = bitalloc_offsets[i]; dca_smpl_bitalloc[i+1].offset = bitalloc_offsets[i];
dca_smpl_bitalloc[i+1].wrap = 1 + (j > 4); dca_smpl_bitalloc[i+1].wrap = 1 + (j > 4);
dca_smpl_bitalloc[i+1].vlc[j].table = &dca_table[dca_vlc_offs[c]];
dca_smpl_bitalloc[i+1].vlc[j].table_allocated = dca_vlc_offs[c + 1] - dca_vlc_offs[c];
init_vlc(&dca_smpl_bitalloc[i+1].vlc[j], bitalloc_maxbits[i][j], init_vlc(&dca_smpl_bitalloc[i+1].vlc[j], bitalloc_maxbits[i][j],
bitalloc_sizes[i], bitalloc_sizes[i],
bitalloc_bits[i][j], 1, 1, bitalloc_bits[i][j], 1, 1,
bitalloc_codes[i][j], 2, 2, INIT_VLC_USE_STATIC); bitalloc_codes[i][j], 2, 2, INIT_VLC_USE_NEW_STATIC);
c++;
} }
vlcs_initialized = 1; vlcs_initialized = 1;
} }