From 9676ffba8346791f494451e68d2a3b37a2918a9b Mon Sep 17 00:00:00 2001 From: Laurent Aimar Date: Mon, 12 Sep 2011 23:46:49 +0200 Subject: Check and propagate errors when VLC trees cannot be built in smacker decoder. MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Signed-off-by: Martin Storsjö --- libavcodec/smacker.c | 20 ++++++++++++-------- 1 file changed, 12 insertions(+), 8 deletions(-) (limited to 'libavcodec/smacker.c') diff --git a/libavcodec/smacker.c b/libavcodec/smacker.c index c6b0c29eaa..32ee39a2d9 100644 --- a/libavcodec/smacker.c +++ b/libavcodec/smacker.c @@ -134,10 +134,10 @@ static int smacker_decode_bigtree(GetBitContext *gb, HuffContext *hc, DBCtx *ctx return -1; } b1 = get_bits_count(gb); - i1 = get_vlc2(gb, ctx->v1->table, SMKTREE_BITS, 3); + i1 = ctx->v1->table ? get_vlc2(gb, ctx->v1->table, SMKTREE_BITS, 3) : 0; b1 = get_bits_count(gb) - b1; b2 = get_bits_count(gb); - i2 = get_vlc2(gb, ctx->v2->table, SMKTREE_BITS, 3); + i2 = ctx->v2->table ? get_vlc2(gb, ctx->v2->table, SMKTREE_BITS, 3) : 0; b2 = get_bits_count(gb) - b2; val = ctx->recode1[i1] | (ctx->recode2[i2] << 8); if(val == ctx->escapes[0]) { @@ -290,7 +290,8 @@ static int decode_header_trees(SmackVContext *smk) { smk->mmap_tbl[0] = 0; smk->mmap_last[0] = smk->mmap_last[1] = smk->mmap_last[2] = 1; } else { - smacker_decode_header_tree(smk, &gb, &smk->mmap_tbl, smk->mmap_last, mmap_size); + if (smacker_decode_header_tree(smk, &gb, &smk->mmap_tbl, smk->mmap_last, mmap_size)) + return -1; } if(!get_bits1(&gb)) { av_log(smk->avctx, AV_LOG_INFO, "Skipping MCLR tree\n"); @@ -298,7 +299,8 @@ static int decode_header_trees(SmackVContext *smk) { smk->mclr_tbl[0] = 0; smk->mclr_last[0] = smk->mclr_last[1] = smk->mclr_last[2] = 1; } else { - smacker_decode_header_tree(smk, &gb, &smk->mclr_tbl, smk->mclr_last, mclr_size); + if (smacker_decode_header_tree(smk, &gb, &smk->mclr_tbl, smk->mclr_last, mclr_size)) + return -1; } if(!get_bits1(&gb)) { av_log(smk->avctx, AV_LOG_INFO, "Skipping FULL tree\n"); @@ -306,7 +308,8 @@ static int decode_header_trees(SmackVContext *smk) { smk->full_tbl[0] = 0; smk->full_last[0] = smk->full_last[1] = smk->full_last[2] = 1; } else { - smacker_decode_header_tree(smk, &gb, &smk->full_tbl, smk->full_last, full_size); + if (smacker_decode_header_tree(smk, &gb, &smk->full_tbl, smk->full_last, full_size)) + return -1; } if(!get_bits1(&gb)) { av_log(smk->avctx, AV_LOG_INFO, "Skipping TYPE tree\n"); @@ -314,7 +317,8 @@ static int decode_header_trees(SmackVContext *smk) { smk->type_tbl[0] = 0; smk->type_last[0] = smk->type_last[1] = smk->type_last[2] = 1; } else { - smacker_decode_header_tree(smk, &gb, &smk->type_tbl, smk->type_last, type_size); + if (smacker_decode_header_tree(smk, &gb, &smk->type_tbl, smk->type_last, type_size)) + return -1; } return 0; @@ -522,8 +526,8 @@ static av_cold int decode_init(AVCodecContext *avctx) return -1; } - decode_header_trees(c); - + if (decode_header_trees(c)) + return -1; return 0; } -- cgit v1.2.3