diff options
Diffstat (limited to 'libavcodec/msmpeg4dec.c')
| -rw-r--r-- | libavcodec/msmpeg4dec.c | 39 |
1 files changed, 27 insertions, 12 deletions
diff --git a/libavcodec/msmpeg4dec.c b/libavcodec/msmpeg4dec.c index 67a8609cdd..624946fa38 100644 --- a/libavcodec/msmpeg4dec.c +++ b/libavcodec/msmpeg4dec.c @@ -1,24 +1,24 @@ /* * MSMPEG4 backend for encoder and decoder * Copyright (c) 2001 Fabrice Bellard - * Copyright (c) 2002-2004 Michael Niedermayer <michaelni@gmx.at> + * Copyright (c) 2002-2013 Michael Niedermayer <michaelni@gmx.at> * * msmpeg4v1 & v2 stuff by Michael Niedermayer <michaelni@gmx.at> * - * 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 */ @@ -27,6 +27,7 @@ #include "mpegutils.h" #include "mpegvideo.h" #include "msmpeg4.h" +#include "libavutil/imgutils.h" #include "libavutil/x86/asm.h" #include "h263.h" #include "mpeg4video.h" @@ -104,6 +105,7 @@ static int msmpeg4v2_decode_motion(MpegEncContext * s, int pred, int f_code) static int msmpeg4v12_decode_mb(MpegEncContext *s, int16_t block[6][64]) { int cbp, code, i; + uint32_t * const mb_type_ptr = &s->current_picture.mb_type[s->mb_x + s->mb_y*s->mb_stride]; if (s->pict_type == AV_PICTURE_TYPE_P) { if (s->use_skip_mb_code) { @@ -117,6 +119,7 @@ static int msmpeg4v12_decode_mb(MpegEncContext *s, int16_t block[6][64]) s->mv[0][0][0] = 0; s->mv[0][0][1] = 0; s->mb_skipped = 1; + *mb_type_ptr = MB_TYPE_SKIP | MB_TYPE_L0 | MB_TYPE_16x16; return 0; } } @@ -165,6 +168,7 @@ static int msmpeg4v12_decode_mb(MpegEncContext *s, int16_t block[6][64]) s->mv_type = MV_TYPE_16X16; s->mv[0][0][0] = mx; s->mv[0][0][1] = my; + *mb_type_ptr = MB_TYPE_L0 | MB_TYPE_16x16; } else { if(s->msmpeg4_version==2){ s->ac_pred = get_bits1(&s->gb); @@ -174,6 +178,7 @@ static int msmpeg4v12_decode_mb(MpegEncContext *s, int16_t block[6][64]) cbp|= get_vlc2(&s->gb, ff_h263_cbpy_vlc.table, CBPY_VLC_BITS, 1)<<2; //FIXME check errors if(s->pict_type==AV_PICTURE_TYPE_P) cbp^=0x3C; } + *mb_type_ptr = MB_TYPE_INTRA; } s->bdsp.clear_blocks(s->block[0]); @@ -283,18 +288,19 @@ static int msmpeg4v34_decode_mb(MpegEncContext *s, int16_t block[6][64]) av_cold int ff_msmpeg4_decode_init(AVCodecContext *avctx) { MpegEncContext *s = avctx->priv_data; - static int done = 0; - int i; + static volatile int done = 0; + int i, ret; MVTable *mv; + if ((ret = av_image_check_size(avctx->width, avctx->height, 0, avctx)) < 0) + return ret; + if (ff_h263_decode_init(avctx) < 0) return -1; ff_msmpeg4_common_init(s); if (!done) { - done = 1; - for(i=0;i<NB_RL_TABLES;i++) { ff_rl_init(&ff_rl_table[i], ff_static_rl_table_store[i]); } @@ -364,6 +370,7 @@ av_cold int ff_msmpeg4_decode_init(AVCodecContext *avctx) INIT_VLC_STATIC(&ff_inter_intra_vlc, INTER_INTRA_VLC_BITS, 4, &ff_table_inter_intra[0][1], 2, 1, &ff_table_inter_intra[0][0], 2, 1, 8); + done = 1; } switch(s->msmpeg4_version){ @@ -581,8 +588,11 @@ static int msmpeg4_decode_dc(MpegEncContext * s, int n, int *dir_ptr) } else { level = get_vlc2(&s->gb, v2_dc_chroma_vlc.table, DC_VLC_BITS, 3); } - if (level < 0) + if (level < 0) { + av_log(s->avctx, AV_LOG_ERROR, "illegal dc vlc\n"); + *dir_ptr = 0; return -1; + } level-=256; }else{ //FIXME optimize use unified tables & index if (n < 4) { @@ -592,6 +602,7 @@ static int msmpeg4_decode_dc(MpegEncContext * s, int n, int *dir_ptr) } if (level < 0){ av_log(s->avctx, AV_LOG_ERROR, "illegal dc vlc\n"); + *dir_ptr = 0; return -1; } @@ -648,7 +659,6 @@ int ff_msmpeg4_decode_block(MpegEncContext * s, int16_t * block, if (level < 0){ av_log(s->avctx, AV_LOG_ERROR, "dc overflow- block: %d qscale: %d//\n", n, s->qscale); if(s->inter_intra_pred) level=0; - else return -1; } if (n < 4) { rl = &ff_rl_table[s->rl_table_index]; @@ -835,9 +845,10 @@ int ff_msmpeg4_decode_block(MpegEncContext * s, int16_t * block, if(i&(~63)){ const int left= get_bits_left(&s->gb); if (((i + 192 == 64 && level / qmul == -1) || - !(s->avctx->err_recognition & AV_EF_BITSTREAM)) && + !(s->avctx->err_recognition & (AV_EF_BITSTREAM|AV_EF_COMPLIANT))) && left >= 0) { av_log(s->avctx, AV_LOG_ERROR, "ignoring overflow at %d %d\n", s->mb_x, s->mb_y); + i = 63; break; }else{ av_log(s->avctx, AV_LOG_ERROR, "ac-tex damaged at %d %d\n", s->mb_x, s->mb_y); @@ -914,6 +925,7 @@ AVCodec ff_msmpeg4v1_decoder = { .close = ff_h263_decode_end, .decode = ff_h263_decode_frame, .capabilities = AV_CODEC_CAP_DRAW_HORIZ_BAND | AV_CODEC_CAP_DR1, + .max_lowres = 3, .pix_fmts = (const enum AVPixelFormat[]) { AV_PIX_FMT_YUV420P, AV_PIX_FMT_NONE @@ -930,6 +942,7 @@ AVCodec ff_msmpeg4v2_decoder = { .close = ff_h263_decode_end, .decode = ff_h263_decode_frame, .capabilities = AV_CODEC_CAP_DRAW_HORIZ_BAND | AV_CODEC_CAP_DR1, + .max_lowres = 3, .pix_fmts = (const enum AVPixelFormat[]) { AV_PIX_FMT_YUV420P, AV_PIX_FMT_NONE @@ -946,6 +959,7 @@ AVCodec ff_msmpeg4v3_decoder = { .close = ff_h263_decode_end, .decode = ff_h263_decode_frame, .capabilities = AV_CODEC_CAP_DRAW_HORIZ_BAND | AV_CODEC_CAP_DR1, + .max_lowres = 3, .pix_fmts = (const enum AVPixelFormat[]) { AV_PIX_FMT_YUV420P, AV_PIX_FMT_NONE @@ -962,6 +976,7 @@ AVCodec ff_wmv1_decoder = { .close = ff_h263_decode_end, .decode = ff_h263_decode_frame, .capabilities = AV_CODEC_CAP_DRAW_HORIZ_BAND | AV_CODEC_CAP_DR1, + .max_lowres = 3, .pix_fmts = (const enum AVPixelFormat[]) { AV_PIX_FMT_YUV420P, AV_PIX_FMT_NONE |