diff options
| author | Laurent Aimar <fenrir@videolan.org> | 2011-09-27 23:43:52 +0200 |
|---|---|---|
| committer | Michael Niedermayer <michaelni@gmx.at> | 2011-09-28 00:20:04 +0200 |
| commit | 61930119cbff7572ebe7ade6cd9268becbec37f4 (patch) | |
| tree | ab1c0a5e71b1b5eae0d8ffdff0c07e2830467f02 /libavcodec/wmavoice.c | |
| parent | e09ae22ab7d9af7f1cbfd2445fa71ad9e7c28ee3 (diff) | |
Check for corrupted extra data in wmavoice decoder.
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
Diffstat (limited to 'libavcodec/wmavoice.c')
| -rw-r--r-- | libavcodec/wmavoice.c | 8 |
1 files changed, 8 insertions, 0 deletions
diff --git a/libavcodec/wmavoice.c b/libavcodec/wmavoice.c index b2deda4ad8..db8f51674a 100644 --- a/libavcodec/wmavoice.c +++ b/libavcodec/wmavoice.c @@ -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 + |