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avcodec/bitstream: fill invalid vlc tables entries as last pass instead of first 

This avoids writing entries twice

Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
This commit is contained in:
Michael Niedermayer 2014-06-16 18:46:14 +02:00
parent 600cbf3672
commit f7f96cf4bc
1 changed files with 6 additions and 5 deletions
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11
libavcodec/bitstream.c
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@ -174,11 +174,6 @@ static int build_table(VLC *vlc, int table_nb_bits, int nb_codes,
return table_index;
table = &vlc->table[table_index];
for (i = 0; i < table_size; i++) {
table[i][1] = 0; //bits
table[i][0] = -1; //codes
}
/* first pass: map codes and compute auxiliary table sizes */
for (i = 0; i < nb_codes; i++) {
n = codes[i].bits;
@ -237,6 +232,12 @@ static int build_table(VLC *vlc, int table_nb_bits, int nb_codes,
i = k-1;
}
}
for (i = 0; i < table_size; i++) {
if (table[i][1] == 0) //bits
table[i][0] = -1; //codes
}
return table_index;
}