diff options
Diffstat (limited to 'libavcodec/indeo5.c')
-rw-r--r-- | libavcodec/indeo5.c | 53 |
1 files changed, 40 insertions, 13 deletions
diff --git a/libavcodec/indeo5.c b/libavcodec/indeo5.c index 83bbcbb..e48cb43 100644 --- a/libavcodec/indeo5.c +++ b/libavcodec/indeo5.c @@ -2,20 +2,20 @@ * Indeo Video Interactive v5 compatible decoder * Copyright (c) 2009 Maxim Poliakovski * - * This file is part of Libav. + * This file is part of FFmpeg. * - * Libav is free software; you can redistribute it and/or + * FFmpeg is free software; you can redistribute it and/or * modify it under the terms of the GNU Lesser General Public * License as published by the Free Software Foundation; either * version 2.1 of the License, or (at your option) any later version. * - * Libav is distributed in the hope that it will be useful, + * FFmpeg is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU * Lesser General Public License for more details. * * You should have received a copy of the GNU Lesser General Public - * License along with Libav; if not, write to the Free Software + * License along with FFmpeg; if not, write to the Free Software * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA */ @@ -59,7 +59,7 @@ enum { */ static int decode_gop_header(IVI45DecContext *ctx, AVCodecContext *avctx) { - int result, i, p, tile_size, pic_size_indx, mb_size, blk_size; + int result, i, p, tile_size, pic_size_indx, mb_size, blk_size, is_scalable; int quant_mat, blk_size_changed = 0; IVIBandDesc *band, *band1, *band2; IVIPicConfig pic_conf; @@ -81,8 +81,8 @@ static int decode_gop_header(IVI45DecContext *ctx, AVCodecContext *avctx) /* num_levels * 3 + 1 */ pic_conf.luma_bands = get_bits(&ctx->gb, 2) * 3 + 1; pic_conf.chroma_bands = get_bits1(&ctx->gb) * 3 + 1; - ctx->is_scalable = pic_conf.luma_bands != 1 || pic_conf.chroma_bands != 1; - if (ctx->is_scalable && (pic_conf.luma_bands != 4 || pic_conf.chroma_bands != 1)) { + is_scalable = pic_conf.luma_bands != 1 || pic_conf.chroma_bands != 1; + if (is_scalable && (pic_conf.luma_bands != 4 || pic_conf.chroma_bands != 1)) { av_log(avctx, AV_LOG_ERROR, "Scalability: unsupported subdivision! Luma bands: %d, chroma bands: %d\n", pic_conf.luma_bands, pic_conf.chroma_bands); return AVERROR_INVALIDDATA; @@ -120,6 +120,7 @@ static int decode_gop_header(IVI45DecContext *ctx, AVCodecContext *avctx) return result; } ctx->pic_conf = pic_conf; + ctx->is_scalable = is_scalable; blk_size_changed = 1; /* force reallocation of the internal structures */ } @@ -133,6 +134,11 @@ static int decode_gop_header(IVI45DecContext *ctx, AVCodecContext *avctx) blk_size = 8 >> get_bits1(&ctx->gb); mb_size = blk_size << !mb_size; + if (p==0 && blk_size==4) { + av_log(avctx, AV_LOG_ERROR, "4x4 luma blocks are unsupported!\n"); + return AVERROR_PATCHWELCOME; + } + blk_size_changed = mb_size != band->mb_size || blk_size != band->blk_size; if (blk_size_changed) { band->mb_size = mb_size; @@ -185,8 +191,10 @@ static int decode_gop_header(IVI45DecContext *ctx, AVCodecContext *avctx) band->is_2d_trans = band->inv_transform == ff_ivi_inverse_slant_8x8 || band->inv_transform == ff_ivi_inverse_slant_4x4; - if (band->transform_size != band->blk_size) + if (band->transform_size != band->blk_size) { + av_log(avctx, AV_LOG_ERROR, "transform and block size mismatch (%d != %d)\n", band->transform_size, band->blk_size); return AVERROR_INVALIDDATA; + } /* select dequant matrix according to plane and band number */ if (!p) { @@ -196,6 +204,10 @@ static int decode_gop_header(IVI45DecContext *ctx, AVCodecContext *avctx) } if (band->blk_size == 8) { + if(quant_mat >= 5){ + av_log(avctx, AV_LOG_ERROR, "quant_mat %d too large!\n", quant_mat); + return -1; + } band->intra_base = &ivi5_base_quant_8x8_intra[quant_mat][0]; band->inter_base = &ivi5_base_quant_8x8_inter[quant_mat][0]; band->intra_scale = &ivi5_scale_quant_8x8_intra[quant_mat][0]; @@ -232,6 +244,7 @@ static int decode_gop_header(IVI45DecContext *ctx, AVCodecContext *avctx) band2->inv_transform = band1->inv_transform; band2->dc_transform = band1->dc_transform; band2->is_2d_trans = band1->is_2d_trans; + band2->transform_size= band1->transform_size; } /* reallocate internal structures if needed */ @@ -322,6 +335,12 @@ static int decode_pic_hdr(IVI45DecContext *ctx, AVCodecContext *avctx) ctx->gop_invalid = 0; } + if (ctx->frame_type == FRAMETYPE_INTER_SCAL && !ctx->is_scalable) { + av_log(avctx, AV_LOG_ERROR, "Scalable inter frame in non scaleable stream\n"); + ctx->frame_type = FRAMETYPE_INTER; + return AVERROR_INVALIDDATA; + } + if (ctx->frame_type != FRAMETYPE_NULL) { ctx->frame_flags = get_bits(&ctx->gb, 8); @@ -432,7 +451,7 @@ static int decode_mb_info(IVI45DecContext *ctx, IVIBandDesc *band, IVITile *tile, AVCodecContext *avctx) { int x, y, mv_x, mv_y, mv_delta, offs, mb_offset, - mv_scale, blks_per_mb; + mv_scale, blks_per_mb, s; IVIMbInfo *mb, *ref_mb; int row_offset = band->mb_size * band->pitch; @@ -478,7 +497,7 @@ static int decode_mb_info(IVI45DecContext *ctx, IVIBandDesc *band, } mb->mv_x = mb->mv_y = 0; /* no motion vector coded */ - if (band->inherit_mv){ + if (band->inherit_mv && ref_mb){ /* motion vector inheritance */ if (mv_scale) { mb->mv_x = ivi_scale_mv(ref_mb->mv_x, mv_scale); @@ -489,7 +508,7 @@ static int decode_mb_info(IVI45DecContext *ctx, IVIBandDesc *band, } } } else { - if (band->inherit_mv) { + if (band->inherit_mv && ref_mb) { mb->type = ref_mb->type; /* copy mb_type from corresponding reference mb */ } else if (ctx->frame_type == FRAMETYPE_INTRA) { mb->type = 0; /* mb_type is always INTRA for intra-frames */ @@ -515,7 +534,7 @@ static int decode_mb_info(IVI45DecContext *ctx, IVIBandDesc *band, if (!mb->type) { mb->mv_x = mb->mv_y = 0; /* there is no motion vector in intra-macroblocks */ } else { - if (band->inherit_mv){ + if (band->inherit_mv && ref_mb){ /* motion vector inheritance */ if (mv_scale) { mb->mv_x = ivi_scale_mv(ref_mb->mv_x, mv_scale); @@ -538,6 +557,15 @@ static int decode_mb_info(IVI45DecContext *ctx, IVIBandDesc *band, } } + s= band->is_halfpel; + if (mb->type) + if ( x + (mb->mv_x >>s) + (y+ (mb->mv_y >>s))*band->pitch < 0 || + x + ((mb->mv_x+s)>>s) + band->mb_size - 1 + + (y+band->mb_size - 1 +((mb->mv_y+s)>>s))*band->pitch > band->bufsize - 1) { + av_log(avctx, AV_LOG_ERROR, "motion vector %d %d outside reference\n", x*s + mb->mv_x, y*s + mb->mv_y); + return AVERROR_INVALIDDATA; + } + mb++; if (ref_mb) ref_mb++; @@ -646,7 +674,6 @@ static av_cold int decode_init(AVCodecContext *avctx) return 0; } - AVCodec ff_indeo5_decoder = { .name = "indeo5", .long_name = NULL_IF_CONFIG_SMALL("Intel Indeo Video Interactive 5"), |