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fix over-allocation. confused b4_stride with mb_width.
Originally committed as revision 24758 to svn://svn.ffmpeg.org/ffmpeg/trunk
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@ -242,7 +242,7 @@ static int update_dimensions(VP8Context *s, int width, int height)
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s->macroblocks_base = av_mallocz((s->mb_stride+s->mb_height*2+2)*sizeof(*s->macroblocks));
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s->filter_strength = av_mallocz(s->mb_stride*sizeof(*s->filter_strength));
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s->intra4x4_pred_mode_top = av_mallocz(s->b4_stride*4);
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s->intra4x4_pred_mode_top = av_mallocz(s->mb_width*4);
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s->top_nnz = av_mallocz(s->mb_width*sizeof(*s->top_nnz));
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s->top_border = av_mallocz((s->mb_width+1)*sizeof(*s->top_border));
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s->segmentation_map = av_mallocz(s->mb_stride*s->mb_height);
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@ -1543,7 +1543,7 @@ static int vp8_decode_frame(AVCodecContext *avctx, void *data, int *data_size,
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memset(s->top_border, 127, (s->mb_width+1)*sizeof(*s->top_border));
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memset(s->ref_count, 0, sizeof(s->ref_count));
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if (s->keyframe)
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memset(s->intra4x4_pred_mode_top, DC_PRED, s->b4_stride*4);
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memset(s->intra4x4_pred_mode_top, DC_PRED, s->mb_width*4);
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for (mb_y = 0; mb_y < s->mb_height; mb_y++) {
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VP56RangeCoder *c = &s->coeff_partition[mb_y & (s->num_coeff_partitions-1)];
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