Merge remote-tracking branch 'qatar/master'

[ffmpeg] / libavcodec / msmpeg4dec.c

diff --git a/libavcodec/msmpeg4dec.c b/libavcodec/msmpeg4dec.c
index bf56bcc7e22a1f9b137669784901a50b12816436..52a53dde3fe5d8e05411dec392d7b4e992c561c4 100644 (file)
--- 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"
@@ -103,6 +104,7 @@ 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) {
@@ -116,6 +118,7 @@ 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;
             }
         }
@@ -164,6 +167,7 @@ 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);
@@ -173,6 +177,7 @@ 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->dsp.clear_blocks(s->block[0]);
@@ -282,18 +287,19 @@ 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_init_rl(&ff_rl_table[i], ff_static_rl_table_store[i]);
         }
@@ -363,6 +369,7 @@ 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){
@@ -580,8 +587,11 @@ 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) {
@@ -591,6 +601,7 @@ 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;
         }
 
@@ -647,7 +658,6 @@ 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];
@@ -833,8 +843,9 @@ int ff_msmpeg4_decode_block(MpegEncContext * s, int16_t * block,
             i-= 192;
             if(i&(~63)){
                 const int left= get_bits_left(&s->gb);
-                if(((i+192 == 64 && level/qmul==-1) || !(s->err_recognition&AV_EF_BITSTREAM)) && left>=0){
+                if(((i+192 == 64 && level/qmul==-1) || !(s->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);
@@ -911,6 +922,7 @@ AVCodec ff_msmpeg4v1_decoder = {
     .close          = ff_h263_decode_end,
     .decode         = ff_h263_decode_frame,
     .capabilities   = CODEC_CAP_DRAW_HORIZ_BAND | CODEC_CAP_DR1,
+    .max_lowres     = 3,
     .pix_fmts       = (const enum AVPixelFormat[]) {
         AV_PIX_FMT_YUV420P,
         AV_PIX_FMT_NONE
@@ -927,6 +939,7 @@ AVCodec ff_msmpeg4v2_decoder = {
     .close          = ff_h263_decode_end,
     .decode         = ff_h263_decode_frame,
     .capabilities   = CODEC_CAP_DRAW_HORIZ_BAND | CODEC_CAP_DR1,
+    .max_lowres     = 3,
     .pix_fmts       = (const enum AVPixelFormat[]) {
         AV_PIX_FMT_YUV420P,
         AV_PIX_FMT_NONE
@@ -943,6 +956,7 @@ AVCodec ff_msmpeg4v3_decoder = {
     .close          = ff_h263_decode_end,
     .decode         = ff_h263_decode_frame,
     .capabilities   = CODEC_CAP_DRAW_HORIZ_BAND | CODEC_CAP_DR1,
+    .max_lowres     = 3,
     .pix_fmts       = (const enum AVPixelFormat[]) {
         AV_PIX_FMT_YUV420P,
         AV_PIX_FMT_NONE
@@ -959,6 +973,7 @@ AVCodec ff_wmv1_decoder = {
     .close          = ff_h263_decode_end,
     .decode         = ff_h263_decode_frame,
     .capabilities   = CODEC_CAP_DRAW_HORIZ_BAND | CODEC_CAP_DR1,
+    .max_lowres     = 3,
     .pix_fmts       = (const enum AVPixelFormat[]) {
         AV_PIX_FMT_YUV420P,
         AV_PIX_FMT_NONE