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Check for corrupted extra data in wmavoice decoder. 

Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
This commit is contained in:
Laurent Aimar 2011-09-27 23:43:52 +02:00 committed by Michael Niedermayer
parent e09ae22ab7
commit 61930119cb
1 changed files with 8 additions and 0 deletions
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8
libavcodec/wmavoice.c
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@ -401,6 +401,10 @@ static av_cold int wmavoice_decode_init(AVCodecContext *ctx)
s->min_pitch_val = ((ctx->sample_rate << 8) / 400 + 50) >> 8;
s->max_pitch_val = ((ctx->sample_rate << 8) * 37 / 2000 + 50) >> 8;
pitch_range = s->max_pitch_val - s->min_pitch_val;
if (pitch_range <= 0) {
av_log(ctx, AV_LOG_ERROR, "Invalid pitch range; broken extradata?\n");
return -1;
}
s->pitch_nbits = av_ceil_log2(pitch_range);
s->last_pitch_val = 40;
s->last_acb_type = ACB_TYPE_NONE;
@ -422,6 +426,10 @@ static av_cold int wmavoice_decode_init(AVCodecContext *ctx)
s->block_conv_table[2] = (pitch_range * 44) >> 6;
s->block_conv_table[3] = s->max_pitch_val - 1;
s->block_delta_pitch_hrange = (pitch_range >> 3) & ~0xF;
if (s->block_delta_pitch_hrange <= 0) {
av_log(ctx, AV_LOG_ERROR, "Invalid delta pitch hrange; broken extradata?\n");
return -1;
}
s->block_delta_pitch_nbits = 1 + av_ceil_log2(s->block_delta_pitch_hrange);
s->block_pitch_range = s->block_conv_table[2] +
s->block_conv_table[3] + 1 +