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wma: initialize prev_block_len_bits, next_block_len_bits, and block_len_bits.

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The initial values are not checked against the number of block sizes.
Initializing them to frame_len_bits will result in a block size index of 0
in these cases instead of something that might be out-of-range.

Fixes Bug 81.
(cherry picked from commit 05d1e45d1f)

Signed-off-by: Reinhard Tartler <siretart@tauware.de>
This commit is contained in:
Justin Ruggles 2011-11-22 13:37:52 -05:00 committed by Reinhard Tartler
parent 7ce728050b
commit 8dba5608dc
1 changed files with 3 additions and 0 deletions
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3
libavcodec/wma.c
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@ -137,6 +137,9 @@ int ff_wma_init(AVCodecContext *avctx, int flags2)
/* compute MDCT block size */
s->frame_len_bits = ff_wma_get_frame_len_bits(s->sample_rate, s->version, 0);
s->next_block_len_bits = s->frame_len_bits;
s->prev_block_len_bits = s->frame_len_bits;
s->block_len_bits = s->frame_len_bits;
s->frame_len = 1 << s->frame_len_bits;
if (s->use_variable_block_len) {