Remove pthreads patch, roll in new patches, disable unchecked bit readers.

libavcodec/h263dec.c

 /*
  * H.263 decoder
  * Copyright (c) 2001 Fabrice Bellard
  * Copyright (c) 2002-2004 Michael Niedermayer <michaelni@gmx.at>
  *
  * This file is part of FFmpeg.
  *
  * 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.
  *
  * 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 FFmpeg; if not, write to the Free Software
  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
  */
 
 /**
  * @file
  * H.263 decoder.
  */
 
-#define UNCHECKED_BITSTREAM_READER 1
-
 #include "libavutil/cpu.h"
 #include "internal.h"
 #include "avcodec.h"
 #include "dsputil.h"
 #include "mpegvideo.h"
 #include "h263.h"
 #include "h263_parser.h"
 #include "mpeg4video_parser.h"
 #include "msmpeg4.h"
 #include "vdpau_internal.h"
@@ skipping 711 matching lines @@
     .priv_data_size = sizeof(MpegEncContext),
     .init           = ff_h263_decode_init,
     .close          = ff_h263_decode_end,
     .decode         = ff_h263_decode_frame,
     .capabilities   = CODEC_CAP_DRAW_HORIZ_BAND | CODEC_CAP_DR1 | CODEC_CAP_TRUNCATED | CODEC_CAP_DELAY,
     .flush= ff_mpeg_flush,
     .max_lowres= 3,
     .long_name= NULL_IF_CONFIG_SMALL("H.263 / H.263-1996, H.263+ / H.263-1998 / H.263 version 2"),
     .pix_fmts= ff_hwaccel_pixfmt_list_420,
 };