preliminary vc9 bitstream decoder, committing to make syncing and team-work on it easier

Originally committed as revision 3861 to svn://svn.ffmpeg.org/ffmpeg/trunk

1 files changed, 1723 insertions, 0 deletions

diff --git a/libavcodec/vc9.c b/libavcodec/vc9.c
new file mode 100644
index 0000000000..8f469d074c
--- /dev/null
+++ b/libavcodec/vc9.c
@@ -0,0 +1,1723 @@
+/*
+ * VC-9 and WMV3 decoder
+ * Copyright (c) 2005 Anonymous
+ * Copyright (c) 2005 Alex Beregszaszi
+ *
+ * This library 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 of the License, or (at your option) any later version.
+ *
+ * This library 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 this library; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
+ *
+ */
+
+/**
+ * @file vc9.c
+ * VC-9 and WMV3 decoder
+ *
+ * TODO: Norm-6 bitplane imode, most AP stuff, optimize, all of MB layer :)
+ * TODO: use MPV_ !!
+ */
+#include "common.h"
+#include "dsputil.h"
+#include "avcodec.h"
+#include "mpegvideo.h"
+#include "vc9data.h"
+
+/* Some inhibiting stuff */
+#define HAS_ADVANCED_PROFILE   1
+#define TRACE                  1
+
+#if TRACE
+#  define INIT_VLC(vlc, nb_bits, nb_codes, bits, bits_wrap, bits_size, \
+                   codes, codes_wrap, codes_size, use_static)          \
+  if (init_vlc(vlc, nb_bits, nb_codes, bits, bits_wrap, bits_size,     \
+               codes, codes_wrap, codes_size, use_static) < 0)         \
+  {                                                                    \
+    av_log(v->avctx, AV_LOG_ERROR, "Error for " # vlc " (%i)\n", i);   \
+    return -1;                                                         \
+  }
+#else
+#  define INIT_VLC(vlc, nb_bits, nb_codes, bits, bits_wrap, bits_size, \
+                   codes, codes_wrap, codes_size, use_static)          \
+  init_vlc(vlc, nb_bits, nb_codes, bits, bits_wrap, bits_size,         \
+           codes, codes_wrap, codes_size, use_static)
+#endif
+
+#define PROFILE_SIMPLE   0
+#define PROFILE_MAIN     1
+#define PROFILE_ADVANCED 3
+
+#define QUANT_FRAME_IMPLICIT   0
+#define QUANT_FRAME_EXPLICIT   1
+#define QUANT_NON_UNIFORM      2
+#define QUANT_UNIFORM          3
+
+/* Where quant can be changed */
+#define DQPROFILE_FOUR_EDGES   0
+#define DQPROFILE_DOUBLE_EDGES 1
+#define DQPROFILE_SINGLE_EDGE  2
+#define DQPROFILE_ALL_MBS      3
+
+/* Which edge is quantized with ALTPQUANT */
+#define DQSINGLE_BEDGE_LEFT   0
+#define DQSINGLE_BEDGE_TOP    1
+#define DQSINGLE_BEDGE_RIGHT  2
+#define DQSINGLE_BEDGE_BOTTOM 3
+
+/* Which pair of edges is quantized with ALTPQUANT */
+#define DQDOUBLE_BEDGE_TOPLEFT     0
+#define DQDOUBLE_BEDGE_TOPRIGHT    1
+#define DQDOUBLE_BEDGE_BOTTOMRIGHT 2
+#define DQDOUBLE_BEDGE_BOTTOMLEFT  3
+
+
+/* Start Codes */
+#define SEQ_SC      0x00000010F /* Sequence Start Code */
+#define SEQ_EC      0x00000000A /* Sequence End code */
+#define SEQ_HDR     /* Sequence Header */
+#define ENTRY_SC    0x00000010E /* Entry Point Start Code */
+#define ENTRY_HDR /* Entry Point Header */
+#define FRM_SC      0x00000010D /* Frame Start Code */
+#define FRM_DAT /* Frame Data (includes a Frame Header) */
+#define FLD_SC      0x00000010C /* Field Start Code */
+#define FLD1_DAT /* Field 1 Data (includes a Frame Header) */
+#define FLD2_DAT /* Field 2 Data (includes a Field Header) */
+#define SLC_SC      0x00000010B /* Slice Start Code */
+#define SLC_HDR /* Slice Header */
+#define SLC_DAT /* Slice Data (FrH or FiH possible) */
+
+/* MV P modes */
+#define MV_PMODE_1MV_HPEL_BILIN   0
+#define MV_PMODE_1MV              1
+#define MV_PMODE_1MV_HPEL         2
+#define MV_PMODE_MIXED_MV         3
+#define MV_PMODE_INTENSITY_COMP   4
+
+/* MV P mode - the 5th element is only used for mode 1 */
+static const uint8_t mv_pmode_table[2][5] = {
+  { MV_PMODE_1MV_HPEL_BILIN, MV_PMODE_1MV, MV_PMODE_1MV_HPEL, MV_PMODE_MIXED_MV, MV_PMODE_INTENSITY_COMP },
+  { MV_PMODE_1MV, MV_PMODE_MIXED_MV, MV_PMODE_1MV_HPEL, MV_PMODE_1MV_HPEL_BILIN, MV_PMODE_INTENSITY_COMP }
+};
+
+/* One more frame type */
+#define BI_TYPE 7
+
+/* FIXME Worse than ugly */
+static const int fps_nr[5] = { 24, 25, 30, 50, 60 },
+  fps_dr[2] = { 1000, 1001 };
+static const uint8_t pquant_table[3][32] = {
+  {  /* Implicit quantizer */
+     0,  1,  2,  3,  4,  5,  6,  7,  8,  6,  7,  8,  9, 10, 11, 12,
+    13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 27, 29, 31
+  },
+  {  /* Explicit quantizer, pquantizer uniform */
+     0,  1,  2,  3,  4,  5,  6,  7,  8,  9, 10, 11, 12, 13, 14, 15,
+    16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31
+  },
+  {  /* Explicit quantizer, pquantizer non-uniform */
+     0,  1,  1,  1,  2,  3,  4,  5,  6,  7,  8,  9, 10, 11, 12, 13,
+    14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 29, 31
+  }
+};
+
+// FIXME move this into the context
+#define VC9_BFRACTION_VLC_BITS 7
+static VLC vc9_bfraction_vlc;
+#define VC9_IMODE_VLC_BITS 4
+static VLC vc9_imode_vlc;
+#define VC9_NORM2_VLC_BITS 3
+static VLC vc9_norm2_vlc;
+/* Could be optimized, one table only needs 8 bits */
+#define VC9_TTMB_VLC_BITS 12
+static VLC vc9_ttmb_vlc[3];
+#define VC9_MV_DIFF_VLC_BITS 15
+static VLC vc9_mv_diff_vlc[4];
+#define VC9_CBPCY_I_VLC_BITS 13
+static VLC vc9_cbpcy_i_vlc;
+#define VC9_CBPCY_P_VLC_BITS 14
+static VLC vc9_cbpcy_p_vlc[4];
+#define VC9_4MV_BLOCK_PATTERN_VLC_BITS 6
+static VLC vc9_4mv_block_pattern_vlc[4];
+#define VC9_LUMA_DC_VLC_BITS 26
+static VLC vc9_luma_dc_vlc[2];
+
+typedef struct VC9Context{
+  /* No MpegEnc context, might be good to use it */
+  GetBitContext gb;
+  AVCodecContext *avctx;
+
+  /***************************/
+  /* Sequence Header         */
+  /***************************/
+  /* Simple/Main Profile */
+  int res_sm; //reserved, 2b
+  int res_x8; //reserved
+  int multires; //frame-level RESPIC syntax element present
+  int res_fasttx; //always 1
+  int res_transtab; //always 0
+  int syncmarker; //Sync markers presents
+  int rangered; //RANGEREDFRM (range reduction) syntax element present
+  int res_rtm_flag; //reserved, set to 1
+  int reserved; //duh
+
+#if HAS_ADVANCED_PROFILE
+  /* Advanced Profile */
+  int level; //3
+  int chromaformat; //2
+  int postprocflag; //frame-based processing use
+  int broadcast; //TFF/RFF present
+    int interlace; //Progressive/interlaced (RPTFTM syntax element)
+  int tfcntrflag; //TFCNTR present
+  int panscanflag; //NUMPANSCANWIN, TOPLEFT{X,Y}, BOTRIGHT{X,Y} presents
+    int extended_dmv;
+  int color_prim; //8
+  int transfer_char; //8
+  int matrix_coef; //8
+  int hrd_param_flag;
+#endif
+
+  /* All Profiles */
+  /* TODO: move all int to flags */
+  int profile; //2
+  int frmrtq_postproc; //3
+  int bitrtq_postproc; //5
+    int loopfilter;
+    int fastuvmc; //Rounding of qpel vector to hpel ? (not in Simple)
+  int extended_mv; //Ext MV in P/B (not in Simple)
+  int dquant; //Q varies with MBs, 2bits (not in Simple)
+  int vstransform; //variable-size transform46
+
+  int overlap; //overlapped transforms in use
+  int quantizer_mode; //2, quantizer mode used for sequence, see QUANT_*
+  int finterpflag; //INTERPFRM present
+
+
+  /*****************************/
+  /* Frame decoding            */
+  /*****************************/
+  /* All profiles */
+  uint8_t mv_mode, mv_mode2; /* MV coding mode */
+  uint8_t pict_type; /* Picture type, mapped on MPEG types */
+  uint8_t pq, altpq; /* Quantizers */
+  uint8_t dquantfrm, dqprofile, dqsbedge, dqbilevel; /* pquant parameters */
+  int width_mb, height_mb;
+  int tile; /* 3x2 if (width_mb%3) else 2x3 */
+  int transacfrm2, transacfrm, transacdctab; //1bit elements
+  uint8_t ttmbf, ttfrm; /* Transform type */
+  uint8_t lumscale, lumshift; /* Luma compensation parameters */
+  int16_t bfraction; /* Relative position % anchors=> how to scale MVs */
+  uint8_t halfpq; /* Uniform quant over image and qp+.5 */
+  uint8_t respic;
+  /* Ranges:
+   * 0 -> [-64n 63.f] x [-32, 31.f]
+   * 1 -> [-128, 127.f] x [-64, 63.f]
+   * 2 -> [-512, 511.f] x [-128, 127.f]
+   * 3 -> [-1024, 1023.f] x [-256, 255.f]
+   */
+  uint8_t mvrange;
+  uint8_t pquantizer;
+  VLC *cbpcy_vlc /* Current CBPCY VLC table */,
+    *mv_diff_vlc /* Current MV Diff VLC table */,
+    *ttmb_vlc /* Current MB Transform Type VLC table */;
+  uint8_t *mv_type_mb_plane; /* bitplane for mv_type == "raw" */
+  uint8_t *skip_mb_plane, /* bitplane for skipped MBs */
+    *direct_mb_plane; /* bitplane for "direct" MBs */
+
+  /* S/M only ? */
+  uint8_t rangeredfrm, interpfrm;
+
+#if HAS_ADVANCED_PROFILE
+  /* Advanced */
+  uint8_t fcm; //0->Progressive, 2->Frame-Interlace, 3->Field-Interlace
+  uint8_t numpanscanwin;
+  uint8_t tfcntr;
+  uint8_t rptfrm, tff, rff;
+  uint8_t topleftx;
+  uint8_t toplefty;
+  uint8_t bottomrightx;
+  uint8_t bottomrighty;
+  uint8_t rndctrl;
+  uint8_t uvsamp;
+  uint8_t postproc;
+  int hrd_num_leaky_buckets;
+  uint8_t bit_rate_exponent;
+  uint8_t buffer_size_exponent;
+  uint8_t *ac_pred_plane;
+  uint8_t *over_flags_plane;
+  uint16_t *hrd_rate, *hrd_buffer;
+#endif
+} VC9Context;
+
+/* FIXME Slow and ugly */
+static int get_prefix(GetBitContext *gb, int stop, int len)
+{
+  int i = 0, tmp = !stop;
+
+  while (i != len && tmp != stop)
+  {
+    tmp = get_bits(gb, 1);
+    i++;
+  }
+  return i;
+}
+
+static int init_common(VC9Context *v)
+{
+    static int done = 0;
+    int i;
+
+    v->mv_type_mb_plane = v->direct_mb_plane = v->skip_mb_plane = NULL;
+    v->pq = -1;
+#if HAS_ADVANCED_PROFILE
+    v->ac_pred_plane = v->over_flags_plane = NULL;
+    v->hrd_rate = v->hrd_buffer = NULL;
+#endif
+    if(!done)
+    {
+        done = 1;
+        INIT_VLC(&vc9_bfraction_vlc, VC9_BFRACTION_VLC_BITS, 23,
+                 vc9_bfraction_bits, 1, 1,
+                 vc9_bfraction_codes, 1, 1, 1);
+        INIT_VLC(&vc9_norm2_vlc, VC9_NORM2_VLC_BITS, 4,
+                 vc9_norm2_bits, 1, 1,
+                 vc9_norm2_codes, 1, 1, 1);
+        INIT_VLC(&vc9_cbpcy_i_vlc, VC9_CBPCY_I_VLC_BITS, 64,
+                 vc9_cbpcy_i_bits, 1, 1,
+                 vc9_cbpcy_i_codes, 2, 2, 1);
+        INIT_VLC(&vc9_imode_vlc, VC9_IMODE_VLC_BITS, 7,
+                 vc9_imode_bits, 1, 1,
+                 vc9_imode_codes, 1, 1, 1);
+        for(i=0; i<3; i++)
+        {
+            INIT_VLC(&vc9_4mv_block_pattern_vlc[i], VC9_4MV_BLOCK_PATTERN_VLC_BITS, 16,
+                     vc9_4mv_block_pattern_bits[i], 1, 1,
+                     vc9_4mv_block_pattern_codes[i], 1, 1, 1);
+            INIT_VLC(&vc9_cbpcy_p_vlc[i], VC9_CBPCY_P_VLC_BITS, 64,
+                     vc9_cbpcy_p_bits[i], 1, 1,
+                     vc9_cbpcy_p_codes[i], 2, 2, 1);
+        }
+        for (i=0; i<2; i++)
+        {
+            INIT_VLC(&vc9_mv_diff_vlc[i], VC9_MV_DIFF_VLC_BITS, 73,
+                     vc9_mv_diff_bits[i], 1, 1,
+                     vc9_mv_diff_codes[i], 2, 2, 1);
+            INIT_VLC(&vc9_luma_dc_vlc[i], VC9_LUMA_DC_VLC_BITS, 26,
+                     vc9_luma_dc_bits[i], 1, 1,
+                     vc9_luma_dc_codes[i], 4, 4, 1);
+            INIT_VLC(&vc9_ttmb_vlc[i], VC9_TTMB_VLC_BITS, 16,
+                     vc9_ttmb_bits[i], 1, 1,
+                     vc9_ttmb_codes[i], 2, 2, 1);
+        }
+    }
+
+    return 0;
+}
+
+#if HAS_ADVANCED_PROFILE
+static int decode_hrd(VC9Context *v, GetBitContext *gb)
+{
+    int i, num;
+
+    num = get_bits(gb, 5);
+
+    if (v->hrd_rate || num != v->hrd_num_leaky_buckets)
+    {
+        av_free(v->hrd_rate);
+        v->hrd_rate = NULL;
+    }
+    if (!v->hrd_rate) v->hrd_rate = av_malloc(num);
+    if (!v->hrd_rate) return -1;
+
+    if (v->hrd_buffer || num != v->hrd_num_leaky_buckets)
+    {
+        av_free(v->hrd_buffer);
+        v->hrd_buffer = NULL;
+    }
+    if (!v->hrd_buffer) v->hrd_buffer = av_malloc(num);
+    if (!v->hrd_buffer) return -1;
+
+    v->hrd_num_leaky_buckets = num;
+
+    //exponent in base-2 for rate
+    v->bit_rate_exponent = get_bits(gb, 4);
+    //exponent in base-2 for buffer_size
+    v->buffer_size_exponent = get_bits(gb, 4);
+
+    for (i=0; i<num; i++)
+    {
+        //mantissae, ordered (if not, use a function ?
+        v->hrd_rate[i] = get_bits(gb, 16);
+        if (i && v->hrd_rate[i-1]>=v->hrd_rate[i])
+        {
+            av_log(v, AV_LOG_ERROR, "HDR Rates aren't strictly increasing:"
+                   "%i vs %i\n", v->hrd_rate[i-1], v->hrd_rate[i]);
+            return -1;
+        }
+        v->hrd_buffer[i] = get_bits(gb, 16);
+        if (i && v->hrd_buffer[i-1]<v->hrd_buffer[i])
+        {
+            av_log(v, AV_LOG_ERROR, "HDR Buffers aren't decreasing:"
+                   "%i vs %i\n", v->hrd_buffer[i-1], v->hrd_buffer[i]);
+            return -1;
+        }
+    }
+    return 0;
+}
+
+static int decode_advanced_sequence_header(AVCodecContext *avctx, GetBitContext *gb)
+{
+    VC9Context *v = avctx->priv_data;
+    int nr, dr, aspect_ratio;
+
+    v->postprocflag = get_bits(gb, 1);
+    v->broadcast = get_bits(gb, 1);
+    v->interlace = get_bits(gb, 1);
+
+    v->tfcntrflag = get_bits(gb, 1);
+    v->finterpflag = get_bits(gb, 1); //common
+    v->panscanflag = get_bits(gb, 1);
+    v->reserved = get_bits(gb, 1);
+    if (v->reserved)
+    {
+        av_log(avctx, AV_LOG_ERROR, "RESERVED should be 0 (is %i)\n",
+               v->reserved);
+        return -1;
+    }
+    if (v->extended_mv)
+        v->extended_dmv = get_bits(gb, 1);
+
+    if (get_bits(gb, 1) /* pic_size_flag */)
+    {
+        avctx->coded_width = get_bits(gb, 12);
+        avctx->coded_height = get_bits(gb, 12);
+        if ( get_bits(gb, 1) /* disp_size_flag */)
+        {
+            avctx->width = get_bits(gb, 14);
+            avctx->height = get_bits(gb, 14);
+        }
+
+        if ( get_bits(gb, 1) /* aspect_ratio_flag */)
+        {
+            aspect_ratio = get_bits(gb, 4); //SAR
+            if (aspect_ratio == 0x0F) //FF_ASPECT_EXTENDED
+            {
+                avctx->sample_aspect_ratio.num = get_bits(gb, 8);
+                avctx->sample_aspect_ratio.den = get_bits(gb, 8);
+            }
+            else if (aspect_ratio == 0x0E)
+            {
+                av_log(avctx, AV_LOG_DEBUG, "Reserved AR found\n");
+            }
+            else
+            {
+              avctx->sample_aspect_ratio = vc9_pixel_aspect[aspect_ratio];
+            }
+        }
+    }
+    else
+    {
+        avctx->coded_width = avctx->width;
+        avctx->coded_height = avctx->height;
+    }
+
+    if ( get_bits(gb, 1) /* framerateflag */)
+    {
+        if ( get_bits(gb, 1) /* framerateind */)
+        {
+            nr = get_bits(gb, 8);
+            dr = get_bits(gb, 4);
+            if (nr<1)
+            {
+                av_log(avctx, AV_LOG_ERROR, "0 is forbidden for FRAMERATENR\n");
+                return -1;
+            }
+            if (nr>5)
+            {
+                av_log(avctx, AV_LOG_ERROR,
+                       "Reserved FRAMERATENR %i not handled\n", nr);
+           }
+            if (dr<1)
+            {
+                av_log(avctx, AV_LOG_ERROR, "0 is forbidden for FRAMERATEDR\n");
+           }
+            if (dr>2)
+            {
+                av_log(avctx, AV_LOG_ERROR,
+                       "Reserved FRAMERATEDR %i not handled\n", dr);
+            }
+            avctx->frame_rate_base = fps_nr[dr];
+            avctx->frame_rate = fps_nr[nr];
+        }
+        else
+        {
+            nr = get_bits(gb, 16);
+            // 0.03125->2048Hz / 0.03125Hz
+            avctx->frame_rate = 1000000;
+            avctx->frame_rate_base = 31250*(1+nr);
+        }
+    }
+
+    if ( get_bits(gb, 1) /* color_format_flag */)
+    {
+        //Chromacity coordinates of color primaries
+        //like ITU-R BT.709-2, BT.470-2, ...
+        v->color_prim = get_bits(gb, 8);
+        if (v->color_prim<1)
+        {
+            av_log(avctx, AV_LOG_ERROR, "0 for COLOR_PRIM is reserved\n");
+            return -1;
+        }
+        if (v->color_prim == 3 || v->color_prim>6)
+        {
+            av_log(avctx, AV_LOG_DEBUG, "Reserved COLOR_PRIM %i found\n",
+                   v->color_prim);
+            return -1;
+        }
+
+        //Opto-electronic transfer characteristics
+        v->transfer_char = get_bits(gb, 8);
+        if (v->transfer_char == 3 || v->transfer_char>8)
+        {
+            av_log(avctx, AV_LOG_DEBUG, "Reserved TRANSFERT_CHAR %i found\n",
+                   v->color_prim);
+            return -1;
+        }
+
+        //Matrix coefficient for primariev->YCbCr
+        v->matrix_coef = get_bits(gb, 8);
+        if (v->matrix_coef < 1) return -1; //forbidden
+        if ((v->matrix_coef>3 && v->matrix_coef<6) || v->matrix_coef>7)
+        {
+            av_log(avctx, AV_LOG_DEBUG, "Reserved MATRIX_COEF %i found\n",
+                   v->color_prim);
+            return -1;
+        }
+    }
+
+    //Hypothetical reference decoder indicator flag
+    v->hrd_param_flag = get_bits(gb, 1);
+    if (v->hrd_param_flag)
+    {
+      if (decode_hrd(v, gb) < 0) return -1;
+    }
+
+    av_log(avctx, AV_LOG_DEBUG, "Advanced profile not supported yet\n");
+    return -1;
+}
+#endif
+
+static int decode_sequence_header(AVCodecContext *avctx, GetBitContext *gb)
+{
+    VC9Context *v = avctx->priv_data;
+
+    v->profile = get_bits(gb, 2);
+    av_log(avctx, AV_LOG_DEBUG, "Profile: %i\n", v->profile);
+
+#if HAS_ADVANCED_PROFILE
+    if (v->profile > PROFILE_MAIN)
+    {
+        v->level = get_bits(gb, 3);
+        v->chromaformat = get_bits(gb, 2);
+        if (v->chromaformat != 1)
+        {
+            av_log(avctx, AV_LOG_ERROR,
+                   "Only 4:2:0 chroma format supported\n");
+            return -1;
+        }
+    }
+    else
+#endif
+    {
+        v->res_sm = get_bits(gb, 2); //reserved
+        if (v->res_sm)
+        {
+            av_log(avctx, AV_LOG_ERROR,
+                   "Reserved RES_SM=%i is forbidden\n", v->res_sm);
+            //return -1;
+        }
+    }
+
+    // (fps-2)/4 (->30)
+    v->frmrtq_postproc = get_bits(gb, 3); //common
+    // (bitrate-32kbps)/64kbps
+    v->bitrtq_postproc = get_bits(gb, 5); //common
+    v->loopfilter = get_bits(gb, 1); //common
+
+#if HAS_ADVANCED_PROFILE
+    if (v->profile <= PROFILE_MAIN)
+#endif
+    {
+        v->res_x8 = get_bits(gb, 1); //reserved
+        if (v->res_x8)
+        {
+            av_log(avctx, AV_LOG_ERROR,
+                   "1 for reserved RES_X8 is forbidden\n");
+            return -1;
+        }
+        v->multires = get_bits(gb, 1);
+        v->res_fasttx = get_bits(gb, 1);
+        if (!v->res_fasttx)
+        {
+            av_log(avctx, AV_LOG_ERROR,
+                   "0 for reserved RES_FASTTX is forbidden\n");
+            //return -1;
+        }
+    }
+
+    v->fastuvmc =  get_bits(gb, 1); //common
+    if (!v->profile && !v->fastuvmc)
+    {
+        av_log(avctx, AV_LOG_ERROR,
+               "FASTUVMC unavailable in Simple Profile\n");
+        return -1;
+    }
+    v->extended_mv =  get_bits(gb, 1); //common
+    if (!v->profile && v->extended_mv)
+    {
+        av_log(avctx, AV_LOG_ERROR,
+               "Extended MVs unavailable in Simple Profile\n");
+        return -1;
+    }
+    v->dquant =  get_bits(gb, 2); //common
+    v->vstransform =  get_bits(gb, 1); //common
+    
+#if HAS_ADVANCED_PROFILE
+    if (v->profile <= PROFILE_MAIN)
+#endif
+    {
+        v->res_transtab = get_bits(gb, 1);
+        if (v->res_transtab)
+        {
+            av_log(avctx, AV_LOG_ERROR,
+                   "1 for reserved RES_TRANSTAB is forbidden\n");
+            return -1;
+        }
+    }
+
+    v->overlap = get_bits(gb, 1); //common
+
+#if HAS_ADVANCED_PROFILE
+    if (v->profile <= PROFILE_MAIN)
+#endif
+    {
+        v->syncmarker = get_bits(gb, 1);
+        v->rangered = get_bits(gb, 1);
+    }
+
+    avctx->max_b_frames = get_bits(gb, 3); //common
+    v->quantizer_mode = get_bits(gb, 2); //common
+
+#if HAS_ADVANCED_PROFILE
+    if (v->profile <= PROFILE_MAIN)
+#endif
+    {
+        v->finterpflag = get_bits(gb, 1); //common
+        v->res_rtm_flag = get_bits(gb, 1); //reserved
+        if (!v->res_rtm_flag)
+        {
+            av_log(avctx, AV_LOG_ERROR,
+                   "0 for reserved RES_RTM_FLAG is forbidden\n");
+            //return -1;
+        }
+#if TRACE
+        av_log(avctx, AV_LOG_INFO,
+               "Profile %i:\nfrmrtq_postproc=%i, bitrtq_postproc=%i\n"
+               "LoopFilter=%i, MultiRes=%i, FastUVMV=%i, Extended MV=%i\n"
+               "Rangered=%i, VSTransform=%i, Overlap=%i, SyncMarker=%i\n"
+               "DQuant=%i, Quantizer mode=%i, Max B frames=%i\n",
+               v->profile, v->frmrtq_postproc, v->bitrtq_postproc,
+               v->loopfilter, v->multires, v->fastuvmc, v->extended_mv,
+               v->rangered, v->vstransform, v->overlap, v->syncmarker,
+               v->dquant, v->quantizer_mode, avctx->max_b_frames
+               );
+#endif
+    }
+#if HAS_ADVANCED_PROFILE
+    else decode_advanced_sequence_header(avctx, gb);
+#endif
+}
+
+
+#if HAS_ADVANCED_PROFILE
+/*****************************************************************************/
+/* Entry point decoding (Advanced Profile)                                   */
+/*****************************************************************************/
+static int advanced_entry_point_process(AVCodecContext *avctx, GetBitContext *gb)
+{
+    VC9Context *v = avctx->priv_data;
+    int range_mapy_flag, range_mapuv_flag, i;
+    if (v->profile != PROFILE_ADVANCED)
+    {
+        av_log(avctx, AV_LOG_ERROR,
+               "Entry point are only defined in Advanced Profile!\n");
+        return -1; //Only for advanced profile!
+    }
+    if (v->hrd_param_flag)
+    {
+        //Update buffer fullness
+        av_log(avctx, AV_LOG_DEBUG, "Buffer fullness update\n");
+        for (i=0; i<v->hrd_num_leaky_buckets; i++)
+            skip_bits(gb, 8);
+    }
+    if ((range_mapy_flag = get_bits(gb, 1)))
+    {
+        //RANGE_MAPY
+        av_log(avctx, AV_LOG_DEBUG, "RANGE_MAPY\n");
+        skip_bits(gb, 3);
+    }
+    if ((range_mapuv_flag = get_bits(gb, 1)))
+    {
+        //RANGE_MAPUV
+        av_log(avctx, AV_LOG_DEBUG, "RANGE_MAPUV\n");
+        skip_bits(gb, 3);
+    }
+    if (v->panscanflag)
+    {
+        //NUMPANSCANWIN
+        v->numpanscanwin = get_bits(gb, 3);
+        av_log(avctx, AV_LOG_DEBUG, "NUMPANSCANWIN: %u\n", v->numpanscanwin);
+    }
+    return 0;
+}
+#endif
+
+/******************************************************************************/
+/* Bitplane decoding                                                          */
+/******************************************************************************/
+#define IMODE_RAW     0
+#define IMODE_NORM2   1
+#define IMODE_DIFF2   2
+#define IMODE_NORM6   3
+#define IMODE_DIFF6   4
+#define IMODE_ROWSKIP 5
+#define IMODE_COLSKIP 6
+
+//FIXME optimize
+static int bitplane_decoding(uint8_t* plane, int width, int height, VC9Context *v)
+{
+    int imode, x, y, code;
+    uint8_t invert, *planep = plane;
+
+    invert = get_bits(&v->gb, 1);
+    imode = get_vlc2(&v->gb, vc9_imode_vlc.table, VC9_IMODE_VLC_BITS, 2);
+    av_log(v->avctx, AV_LOG_DEBUG, "Bitplane: imode=%i, invert=%i\n",
+           imode, invert);
+
+    switch (imode)
+    {
+    case IMODE_RAW:
+        for (y=0; y<height; y++)
+        {
+            for (x=0; x<width; x++)
+                planep[x] = (-get_bits(&v->gb, 1)); //-1=0xFF
+            planep += width;
+        }
+        break;
+    case IMODE_DIFF2:
+    case IMODE_NORM2:
+        if ((height*width) & 1) *(++planep) = get_bits(&v->gb, 1);
+        code = get_vlc2(&v->gb, vc9_norm2_vlc.table, VC9_NORM2_VLC_BITS, 2);
+        *(++planep) = code&1; //lsb => left
+        *(++planep) = code&2; //msb => right - this is a bitplane, so only !0 matters
+        break;
+    case IMODE_DIFF6:
+    case IMODE_NORM6:
+        av_log(v->avctx, AV_LOG_ERROR, "Imode using Norm-6 isn't supported\n");
+        return -1;
+        break;
+    case IMODE_ROWSKIP:
+        for (y=0; y<height; y++)
+        {
+            if (get_bits(&v->gb, 1)) //rowskip
+              memset(planep, 0, width);
+            else for (x=0; x<width; x++) planep[x] = get_bits(&v->gb, 1);
+            planep += width;
+        }
+        break;
+    case IMODE_COLSKIP: //Teh ugly
+        for (x=0; x<width; x++)
+        {
+            planep = plane;
+            if (get_bits(&v->gb, 1)) //colskip
+            {
+                for (y=0; y<height; y++)
+                {
+                    planep[x] = 0;
+                    planep += width;
+                }
+            }
+            else
+            {
+                for (y=0; y<height; y++)
+                {
+                    planep[x] = get_bits(&v->gb, 1);
+                    planep += width;
+                }
+            }
+        }
+        break;
+    default: break;
+    }
+
+    /* Applying diff operator */
+    if (imode == IMODE_DIFF2 || imode == IMODE_DIFF2)
+    {
+        /* And what about j=0 !? */
+        planep = plane + width;
+        memset(plane, invert, width);
+        for (y=0; y<height; y++)
+        {
+            planep[0] = planep[-width];
+            for (x=1; x<width; x++)
+            {
+                if (planep[x-1] != planep[-width]) planep[x] = invert;
+                else planep[x] = planep[x-1];
+            }
+            planep += width;
+        }
+    }
+    else if (invert)
+    {
+        planep = plane;
+        for (x=0; x<width*height; x++) planep[x] = !planep[x];
+    }
+    return 0;
+}
+
+/*****************************************************************************/
+/* VOP Dquant decoding                                                       */
+/*****************************************************************************/
+static int vop_dquant_decoding(VC9Context *v)
+{
+    int pqdiff;
+
+    //variable size
+    if (v->dquant == 2)
+    {
+        pqdiff = get_bits(&v->gb, 3);
+        if (pqdiff == 7) v->altpq = get_bits(&v->gb, 5);
+        else v->altpq = v->pq + pqdiff + 1;
+    }
+    else
+    {
+        v->dquantfrm = get_bits(&v->gb, 1);
+        if ( v->dquantfrm )
+        {
+            v->dqprofile = get_bits(&v->gb, 2);
+            switch (v->dqprofile)
+            {
+            case DQPROFILE_SINGLE_EDGE:
+            case DQPROFILE_DOUBLE_EDGES:
+                v->dqsbedge = get_bits(&v->gb, 2);
+                break;
+            case DQPROFILE_ALL_MBS:
+                v->dqbilevel = get_bits(&v->gb, 1);
+            default: break; //Forbidden ?
+            }
+            if (!v->dqbilevel || v->dqprofile != DQPROFILE_ALL_MBS)
+            {
+                pqdiff = get_bits(&v->gb, 3);
+                if (pqdiff == 7) v->altpq = get_bits(&v->gb, 5);
+                else v->altpq = v->pq + pqdiff + 1;
+            }
+        }
+    }
+    return 0;
+}
+
+/*****************************************************************************/
+/* All Profiles picture header decoding specific functions                   */
+/* Only pro/epilog differs between Simple/Main and Advanced => check caller  */
+/*****************************************************************************/
+static int decode_bi_picture_header(VC9Context *v)
+{
+    /* Very particular case:
+       - for S/M Profiles, decode_b_picture_header reads BF,
+         bfraction then determine if this is a BI frame, calling
+         this function afterwards
+       - for A Profile, PTYPE already tells so and we can go
+         directly there
+    */
+    int pqindex;
+
+    /* Read the quantization stuff */
+    pqindex = get_bits(&v->gb, 5);
+    if (v->quantizer_mode == QUANT_FRAME_IMPLICIT)
+        v->pq = pquant_table[0][pqindex];
+    else
+    {
+        v->pq = pquant_table[v->quantizer_mode-1][pqindex];
+    }
+    if (pqindex < 9) v->halfpq = get_bits(&v->gb, 1);
+    if (v->quantizer_mode == QUANT_FRAME_EXPLICIT)
+        v->pquantizer = get_bits(&v->gb, 1);
+
+    /* Read the MV type/mode */
+    if (v->extended_mv == 1)
+        v->mvrange = get_prefix(&v->gb, 0, 3);
+
+    /* FIXME: what table are used in that case ? */
+    v->mv_diff_vlc = &vc9_mv_diff_vlc[0];
+    v->cbpcy_vlc = &vc9_cbpcy_i_vlc;
+
+    av_log(v->avctx, AV_LOG_DEBUG, "B frame, QP=%i\n", v->pq);
+    av_log(v->avctx, AV_LOG_ERROR, "BI_TYPE not supported yet\n");
+    /* Epilog should be done in caller */
+    return -1;
+}
+
+static int decode_b_picture_header(VC9Context *v)
+{
+    int pqindex;
+
+    /* Prolog common to all frametypes should be done in caller */
+    if (v->profile == PROFILE_SIMPLE)
+    {
+        av_log(v, AV_LOG_ERROR, "Found a B frame while in Simple Profile!\n");
+        return FRAME_SKIPED;
+    }
+
+    v->bfraction = vc9_bfraction_lut[get_vlc2(&v->gb, vc9_bfraction_vlc.table,
+                                              VC9_BFRACTION_VLC_BITS, 2)];
+    if (v->bfraction < -1)
+    {
+        av_log(v, AV_LOG_ERROR, "Invalid BFRaction\n");
+        return FRAME_SKIPED;
+    }
+    else if (!v->bfraction)
+    {
+        /* We actually have a BI frame */
+        return decode_bi_picture_header(v);
+    }
+
+    /* Read the quantization stuff */
+    pqindex = get_bits(&v->gb, 5);
+    if (v->quantizer_mode == QUANT_FRAME_IMPLICIT)
+        v->pq = pquant_table[0][pqindex];
+    else
+    {
+        v->pq = pquant_table[v->quantizer_mode-1][pqindex];
+    }
+    if (pqindex < 9) v->halfpq = get_bits(&v->gb, 1);
+    if (v->quantizer_mode == QUANT_FRAME_EXPLICIT)
+        v->pquantizer = get_bits(&v->gb, 1);
+
+    /* Read the MV type/mode */
+    if (v->extended_mv == 1)
+        v->mvrange = get_prefix(&v->gb, 0, 3);
+    v->mv_mode = get_bits(&v->gb, 1);
+    if (v->pq < 13)
+    {
+        if (!v->mv_mode)
+        {
+            v->mv_mode = get_bits(&v->gb, 2);
+            if (v->mv_mode)
+                av_log(v, AV_LOG_ERROR,
+                       "mv_mode for lowquant B frame was %i\n", v->mv_mode);
+        }
+    }
+    else
+    {
+        if (!v->mv_mode)
+        {
+            if (get_bits(&v->gb, 1))
+                av_log(v, AV_LOG_ERROR,
+                       "mv_mode for highquant B frame was %i\n", v->mv_mode);
+        }
+        v->mv_mode = 1-v->mv_mode; //To match (pq < 13) mapping
+    }
+
+    if (v->mv_mode == MV_PMODE_MIXED_MV)
+    {
+        if (bitplane_decoding( v->mv_type_mb_plane, v->width_mb,
+                                   v->height_mb, v)<0)
+            return -1;
+    }
+
+    //bitplane
+    bitplane_decoding(v->direct_mb_plane, v->width_mb, v->height_mb, v);
+    bitplane_decoding(v->skip_mb_plane, v->width_mb, v->height_mb, v);
+
+    /* FIXME: what is actually chosen for B frames ? */
+    v->mv_diff_vlc = &vc9_mv_diff_vlc[get_bits(&v->gb, 2)];
+    v->cbpcy_vlc = &vc9_cbpcy_p_vlc[get_bits(&v->gb, 2)];
+    if (v->dquant)
+    {
+        vop_dquant_decoding(v);
+    }
+
+    if (v->vstransform)
+    {
+        v->ttmbf = get_bits(&v->gb, 1);
+        if (v->ttmbf)
+        {
+            v->ttfrm = get_bits(&v->gb, 2);
+            av_log(v, AV_LOG_INFO, "Transform used: %ix%i\n",
+                   (v->ttfrm & 2) ? 4 : 8, (v->ttfrm & 1) ? 4 : 8);
+        }
+    }
+    /* Epilog should be done in caller */
+    return 0;
+}
+
+static int decode_i_picture_header(VC9Context *v)
+{
+  int pqindex, status = 0, ac_pred, condover;
+
+    /* Prolog common to all frametypes should be done in caller */
+    //BF = Buffer Fullness
+    if (v->profile <= PROFILE_MAIN && get_bits(&v->gb, 7))
+    {
+        av_log(v, AV_LOG_DEBUG, "I BufferFullness not 0\n");
+    }
+
+    /* Quantizer stuff */
+    pqindex = get_bits(&v->gb, 5);
+    if (v->quantizer_mode == QUANT_FRAME_IMPLICIT)
+        v->pq = pquant_table[0][pqindex];
+    else
+    {
+        v->pq = pquant_table[v->quantizer_mode-1][pqindex];
+    }
+    if (pqindex < 9) v->halfpq = get_bits(&v->gb, 1);
+    if (v->quantizer_mode == QUANT_FRAME_EXPLICIT)
+        v->pquantizer = get_bits(&v->gb, 1);
+    av_log(v->avctx, AV_LOG_DEBUG, "I frame: QP=%i (+%i/2)\n",
+           v->pq, v->halfpq);
+#if HAS_ADVANCED_PROFILE
+    if (v->profile <= PROFILE_MAIN)
+#endif
+    {
+        if (v->extended_mv) v->mvrange = get_prefix(&v->gb, 0, 3);
+        if (v->multires) v->respic = get_bits(&v->gb, 2);
+    }
+#if HAS_ADVANCED_PROFILE
+    else
+    {
+        ac_pred = get_bits(&v->gb, 1);
+        if (v->postprocflag) v->postproc = get_bits(&v->gb, 1);
+        /* 7.1.1.34 + 8.5.2 */
+        if (v->overlap && v->pq<9)
+        {
+            condover = get_bits(&v->gb, 1);
+            if (condover)
+            {
+                condover = 2+get_bits(&v->gb, 1);
+                if (condover == 3)
+                    status = bitplane_decoding(v->over_flags_plane,
+                                                   v->width_mb, v->height_mb, v);
+            }
+        }
+    }
+#endif
+
+    /* Epilog should be done in caller */
+    return status;
+}
+
+static int decode_p_picture_header(VC9Context *v)
+{
+    /* INTERFRM, FRMCNT, RANGEREDFRM read in caller */
+    int lowquant, pqindex;
+
+    pqindex = get_bits(&v->gb, 5);
+    if (v->quantizer_mode == QUANT_FRAME_IMPLICIT)
+        v->pq = pquant_table[0][pqindex];
+    else
+    {
+        v->pq = pquant_table[v->quantizer_mode-1][pqindex];
+    }
+    if (pqindex < 9) v->halfpq = get_bits(&v->gb, 1);
+    if (v->quantizer_mode == QUANT_FRAME_EXPLICIT)
+        v->pquantizer = get_bits(&v->gb, 1);
+    av_log(v->avctx, AV_LOG_DEBUG, "P Frame: QP=%i (+%i/2)\n",
+           v->pq, v->halfpq);
+    if (v->extended_mv == 1) v->mvrange = get_prefix(&v->gb, 0, 3);
+#if HAS_ADVANCED_PROFILE
+    if (v->profile > PROFILE_MAIN)
+    {
+        if (v->postprocflag) v->postproc = get_bits(&v->gb, 1);
+    }
+    else
+#endif
+        if (v->multires) v->respic = get_bits(&v->gb, 2);
+    lowquant = (v->pquantizer>12) ? 0 : 1;
+    v->mv_mode = mv_pmode_table[lowquant][get_prefix(&v->gb, 1, 4)];
+    if (v->mv_mode == MV_PMODE_INTENSITY_COMP)
+    {
+        v->mv_mode2 = mv_pmode_table[lowquant][get_prefix(&v->gb, 1, 3)];
+        v->lumscale = get_bits(&v->gb, 6);
+        v->lumshift = get_bits(&v->gb, 6);
+    }
+
+    if ((v->mv_mode == MV_PMODE_INTENSITY_COMP &&
+         v->mv_mode2 == MV_PMODE_MIXED_MV)
+        || v->mv_mode == MV_PMODE_MIXED_MV)
+    {
+        if (bitplane_decoding(v->mv_type_mb_plane, v->width_mb,
+                                  v->height_mb, v) < 0)
+            return -1;
+    }
+
+    if (bitplane_decoding(v->skip_mb_plane, v->width_mb,
+                              v->height_mb, v) < 0)
+        return -1;
+
+    /* Hopefully this is correct for P frames */
+    v->mv_diff_vlc = &vc9_mv_diff_vlc[get_bits(&v->gb, 2)];
+    v->cbpcy_vlc = &vc9_cbpcy_p_vlc[get_bits(&v->gb, 2)];
+
+    if (v->dquant)
+    {
+        av_log(v->avctx, AV_LOG_INFO, "VOP DQuant info\n");
+        vop_dquant_decoding(v);
+    }
+
+    if (v->vstransform)
+    {
+        v->ttmbf = get_bits(&v->gb, 1);
+        if (v->ttmbf)
+        {
+            v->ttfrm = get_bits(&v->gb, 2);
+            av_log(v->avctx, AV_LOG_INFO, "Transform used: %ix%i\n",
+                   (v->ttfrm & 2) ? 4 : 8, (v->ttfrm & 1) ? 4 : 8);
+        }
+    }
+    /* Epilog should be done in caller */
+    return 0;
+}
+
+
+static int standard_decode_picture_header(VC9Context *v)
+{
+    int status = 0;
+
+    if (v->finterpflag) v->interpfrm = get_bits(&v->gb, 1);
+    skip_bits(&v->gb, 2); //framecnt unused
+    if (v->rangered) v->rangeredfrm = get_bits(&v->gb, 1);
+    v->pict_type = get_bits(&v->gb, 1);
+    if (v->avctx->max_b_frames && !v->pict_type)
+    {
+        if (get_bits(&v->gb, 1)) v->pict_type = I_TYPE;
+        else v->pict_type = P_TYPE;
+    }
+    else v->pict_type++; //P_TYPE
+
+    switch (v->pict_type)
+    {
+    case I_TYPE: status = decode_i_picture_header(v); break;
+    case BI_TYPE: status = decode_b_picture_header(v); break;
+    case P_TYPE: status = decode_p_picture_header(v); break;
+    case B_TYPE: status = decode_b_picture_header(v); break;
+    }
+
+    if (status == FRAME_SKIPED)
+    {
+      av_log(v, AV_LOG_INFO, "Skipping frame...\n");
+      return status;
+    }
+
+    /* AC/DC Syntax */
+    v->transacfrm = get_bits(&v->gb, 1);
+    if (v->transacfrm) v->transacfrm += get_bits(&v->gb, 1);
+    if (v->pict_type == I_TYPE || v->pict_type == BI_TYPE)
+    {
+        v->transacfrm2 = get_bits(&v->gb, 1);
+        if (v->transacfrm2) v->transacfrm2 += get_bits(&v->gb, 1);
+    }
+    v->transacdctab = get_bits(&v->gb, 1);
+   
+    return 0;
+}
+
+
+#if HAS_ADVANCED_PROFILE
+/******************************************************************************/
+/* Advanced Profile picture header decoding specific functions                */
+/******************************************************************************/
+static int advanced_decode_picture_header(VC9Context *v)
+{
+    static const int type_table[4] = { P_TYPE, B_TYPE, I_TYPE, BI_TYPE };
+    int type, i, ret;
+
+    if (v->interlace)
+    {
+        v->fcm = get_bits(&v->gb, 1);
+        if (v->fcm) v->fcm = 2+get_bits(&v->gb, 1);
+    }
+
+    type = get_prefix(&v->gb, 0, 4);
+    if (type > 4 || type < 0) return FRAME_SKIPED;
+    v->pict_type = type_table[type];
+    av_log(v->avctx, AV_LOG_INFO, "AP Frame Type: %i\n", v->pict_type);
+
+    if (v->tfcntrflag) v->tfcntr = get_bits(&v->gb, 8);
+    if (v->broadcast)
+    {
+        if (!v->interlace) v->rptfrm = get_bits(&v->gb, 2);
+        else
+        {
+            v->tff = get_bits(&v->gb, 1);
+            v->rff = get_bits(&v->gb, 1);
+        }
+    }
+
+    if (v->panscanflag)
+    {
+#if 0
+        for (i=0; i<v->numpanscanwin; i++)
+        {
+            v->topleftx[i] = get_bits(&v->gb, 16);
+            v->toplefty[i] = get_bits(&v->gb, 16);
+            v->bottomrightx[i] = get_bits(&v->gb, 16);
+            v->bottomrighty[i] = get_bits(&v->gb, 16);
+        }
+#else
+        skip_bits(&v->gb, 16*4*v->numpanscanwin);
+#endif
+    }
+    v->rndctrl = get_bits(&v->gb, 1);
+    v->uvsamp = get_bits(&v->gb, 1);
+    if (v->finterpflag == 1) v->interpfrm = get_bits(&v->gb, 1);
+
+    switch(v->pict_type)
+    {
+    case I_TYPE: if (decode_i_picture_header(v) < 0) return -1;
+    case P_TYPE: if (decode_p_picture_header(v) < 0) return -1;
+    case BI_TYPE:
+    case B_TYPE: if (decode_b_picture_header(v) < 0) return FRAME_SKIPED;
+    default: break;
+    }
+
+    /* AC/DC Syntax */
+    v->transacfrm = get_bits(&v->gb, 1);
+    if (v->transacfrm) v->transacfrm += get_bits(&v->gb, 1);
+    if (v->pict_type == I_TYPE || v->pict_type == BI_TYPE)
+    {
+        v->transacfrm2 = get_bits(&v->gb, 1);
+        if (v->transacfrm2) v->transacfrm2 += get_bits(&v->gb, 1);
+    }
+    v->transacdctab = get_bits(&v->gb, 1);
+    if (v->pict_type == I_TYPE) vop_dquant_decoding(v);
+
+    return 0;
+}
+#endif
+
+/******************************************************************************/
+/* MacroBlock decoding functions                                              */
+/******************************************************************************/
+static int standard_decode_i_mbs(VC9Context *v)
+{
+    int x, y, ac_pred, cbpcy;
+
+    /* Select ttmb table depending on pq */
+    if (v->pq < 5) v->ttmb_vlc = &vc9_ttmb_vlc[0];
+    else if (v->pq < 13) v->ttmb_vlc = &vc9_ttmb_vlc[1];
+    else v->ttmb_vlc = &vc9_ttmb_vlc[2];
+
+    for (y=0; y<v->height_mb; y++)
+    {
+        for (x=0; x<v->width_mb; x++)
+        {
+            cbpcy = get_vlc2(&v->gb, vc9_cbpcy_i_vlc.table,
+                             VC9_CBPCY_I_VLC_BITS, 2);
+            ac_pred = get_bits(&v->gb, 1);
+            //Decode blocks from that mb wrt cbpcy
+        }
+    }
+    return 0;
+}
+
+#define GET_MQUANT()                                           \
+  if (v->dquantfrm)                                            \
+  {                                                            \
+    if (v->dqprofile == DQPROFILE_ALL_MBS)                     \
+    {                                                          \
+      if (v->dqbilevel)                                        \
+      {                                                        \
+        mquant = (get_bits(&v->gb, 1)) ? v->pq : v->altpq;     \
+      }                                                        \
+      else                                                     \
+      {                                                        \
+        mqdiff = get_bits(&v->gb, 3);                          \
+        if (mqdiff != 7) mquant = v->pq + mqdiff;              \
+        else mquant = get_bits(&v->gb, 5);                     \
+      }                                                        \
+    }                                                          \
+  }
+
+/* MVDATA decoding from 8.3.5.2 */
+#define GET_MVDATA()                                           \
+  index = 1 + get_vlc2(&v->gb, v->mv_diff_vlc->table,          \
+                       VC9_MV_DIFF_VLC_BITS, 2);               \
+  if (index > 36)                                              \
+  {                                                            \
+    mb_has_coeffs = 1;                                         \
+    index -= 37;                                               \
+  }                                                            \
+  else mb_has_coeffs = 0;                                      \
+  mb_is_intra = 0;                                             \
+  if (!index) { dmv_x = dmv_y = 0; }                           \
+  else if (index == 35)                                        \
+  {                                                            \
+    dmv_x = get_bits(&v->gb, k_x);                             \
+    dmv_y = get_bits(&v->gb, k_y);                             \
+    mb_is_intra = 1;                                           \
+  }                                                            \
+  else                                                         \
+  {                                                            \
+    index1 = index%6;                                          \
+    if (hpel_flag && index1 == 5) val = 1;                     \
+    else val = 0;                                              \
+    val = get_bits(&v->gb, size_table[index1] - val);          \
+    sign = 0 - (val&1);                                        \
+    dmv_x = (sign ^ ((val>>1) + offset_table[index1])) - sign; \
+                                                               \
+    index1 = index/6;                                          \
+    if (hpel_flag && index1 == 5) val = 1;                     \
+    else val = 0;                                              \
+    val = get_bits(&v->gb, size_table[index1] - val);          \
+    sign = 0 - (val&1);                                        \
+    dmv_y = (sign ^ ((val>>1) + offset_table[index1])) - sign; \
+  }
+
+static int decode_p_mbs(VC9Context *v)
+{
+    int x, y, current_mb = 0, i; /* MB/Block Position info */
+    int skip_mb_bit = 0, cbpcy; /* MB/B skip */
+    int hybrid_pred, ac_pred; /* Prediction types */
+    int mb_has_coeffs = 1  /* last_flag */, mb_is_intra;
+    int dmv_x, dmv_y; /* Differential MV components */
+    int mv_mode_bit = 0; /* mv_mode_bit: 1MV=0, 4MV=0 */
+    int mqdiff, mquant; /* MB quantization */
+    int tt_block; /* MB Transform type */
+    static const int size_table[6] = { 0, 2, 3, 4, 5, 8 },
+        offset_table[6] = { 0, 1, 3, 7, 15, 31 };
+    int k_x, k_y; /* Long MV fixed bitlength */
+    int hpel_flag, intra_flag; /* Some MB properties */
+    int index, index1; /* LUT indices */
+    int val, sign;
+
+    /* Select ttmb table depending on pq */
+    if (v->pq < 5) v->ttmb_vlc = &vc9_ttmb_vlc[0];
+    else if (v->pq < 13) v->ttmb_vlc = &vc9_ttmb_vlc[1];
+    else v->ttmb_vlc = &vc9_ttmb_vlc[2];
+
+    /* Select proper long MV range */
+    switch (v->mvrange)
+    {
+    case 1: k_x = 10; k_y = 9; break;
+    case 2: k_x = 12; k_y = 10; break;
+    case 3: k_x = 13; k_y = 11; break;
+    default: /*case 0 too */ k_x = 9; k_y = 8; break;
+    }
+
+    hpel_flag = v->mv_mode & 1; //MV_PMODE is HPEL
+    k_x -= hpel_flag;
+    k_y -= hpel_flag;
+
+    for (y=0; y<v->height_mb; y++)
+    {
+        for (x=0; x<v->width_mb; x++)
+        {
+            if (v->mv_type_mb_plane[current_mb])
+                mv_mode_bit = get_bits(&v->gb, 1);
+            if (0) //skipmb is rawmode
+                skip_mb_bit = get_bits(&v->gb, 1);
+            if (!mv_mode_bit) /* 1MV mode */
+            {
+                if (!v->skip_mb_plane[current_mb])
+                {
+                    GET_MVDATA();
+
+                    /* hybrid mv pred, 8.3.5.3.4 */
+                    if (v->mv_mode == MV_PMODE_1MV ||
+                        v->mv_mode == MV_PMODE_MIXED_MV)
+                        hybrid_pred = get_bits(&v->gb, 1);
+                    if (mb_is_intra && !mb_has_coeffs)
+                    {
+                        GET_MQUANT();
+                        ac_pred = get_bits(&v->gb, 1);
+                    }
+                    else if (mb_has_coeffs)
+                    {
+                        if (mb_is_intra) ac_pred = get_bits(&v->gb, 1);
+                        cbpcy = get_vlc2(&v->gb, v->cbpcy_vlc->table,
+                                         VC9_CBPCY_P_VLC_BITS, 2);
+                        GET_MQUANT();
+                    }
+                    if (!v->ttmbf)
+                        v->ttfrm = get_vlc2(&v->gb, v->ttmb_vlc->table,
+                                            VC9_TTMB_VLC_BITS, 12);
+                    //Decode blocks from that mb wrt cbpcy
+                }
+                else //Skipped
+                {
+                    /* hybrid mv pred, 8.3.5.3.4 */
+                    if (v->mv_mode == MV_PMODE_1MV ||
+                        v->mv_mode == MV_PMODE_MIXED_MV)
+                        hybrid_pred = get_bits(&v->gb, 1);
+                }
+            } //1MV mode
+            else //4MV mode
+            {
+              if (!v->skip_mb_plane[current_mb] /* unskipped MB */)
+                {
+                    cbpcy = get_vlc2(&v->gb, v->cbpcy_vlc->table,
+                                     VC9_CBPCY_P_VLC_BITS, 2);
+                    for (i=0; i<4; i++) //For all 4 Y blocks
+                    {
+                        if (cbpcy & (1<<6) /* cbpcy set for this block */)
+                        {
+                            GET_MVDATA();
+                        }
+                        if (v->mv_mode == MV_PMODE_MIXED_MV /* Hybrid pred */)
+                            hybrid_pred = get_bits(&v->gb, 1);
+                        GET_MQUANT();
+                        if (mb_is_intra /* One of the 4 blocks is intra */ &&
+                            index /* non-zero pred for that block */)
+                            ac_pred = get_bits(&v->gb, 1);
+                        if (!v->ttmbf)
+                            tt_block = get_vlc2(&v->gb, v->ttmb_vlc->table,
+                                                VC9_TTMB_VLC_BITS, 12);
+            
+                        /* TODO: Process blocks wrt cbpcy */
+            
+                        /* Prepare cbpcy for next block */
+                        cbpcy <<= 1;
+                    }
+                }
+                else //Skipped MB
+                {
+                    for (i=0; i<4; i++) //All 4 Y blocks
+                    {
+                        if (v->mv_mode == MV_PMODE_MIXED_MV /* Hybrid pred */)
+                            hybrid_pred = get_bits(&v->gb, 1);
+                        
+                        /* FIXME: do something */
+                    }
+                }
+            }
+        }
+        current_mb++;
+    }
+    return 0;
+}
+
+static int decode_b_mbs(VC9Context *v)
+{
+    int x, y, current_mb = 0 , last_mb = v->height_mb*v->width_mb,
+        i /* MB / B postion information */;
+    int direct_b_bit = 0, skip_mb_bit = 0;
+    int ac_pred;
+    int b_mv1 = 0, b_mv2 = 0, b_mv_type = 0;
+    int mquant, mqdiff; /* MB quant stuff */
+    int tt_block; /* Block transform type */
+    
+    for (y=0; y<v->height_mb; y++)
+    {
+        for (x=0; x<v->width_mb; x++)
+        {
+            if (v->direct_mb_plane[current_mb])
+              direct_b_bit = get_bits(&v->gb, 1);
+            if (1 /* Skip mode is raw */)
+            {
+                /* FIXME getting tired commenting */
+#if 0
+                skip_mb_bit = get_bits(&v->gb, n); //vlc
+#endif
+            }
+            if (!direct_b_bit)
+            {
+                if (skip_mb_bit)
+                {
+                    /* FIXME getting tired commenting */
+#if 0
+                    b_mv_type = get_bits(&v->gb, n); //vlc
+#endif
+                }
+                else
+                { 
+                    /* FIXME getting tired commenting */
+#if 0
+                    b_mv1 = get_bits(&v->gb, n); //VLC
+#endif
+                    if (1 /* b_mv1 isn't intra */)
+                    {
+                        /* FIXME: actually read it */
+                        b_mv_type = 0; //vlc
+                    }
+                }
+            }
+            if (!skip_mb_bit)
+            {
+                if (b_mv1 != last_mb)
+                {
+                    GET_MQUANT();
+                    if (1 /* intra mb */)
+                        ac_pred = get_bits(&v->gb, 1);
+                }
+                else
+                {
+                    if (1 /* forward_mb is interpolate */)
+                    {
+                        /* FIXME: actually read it */
+                        b_mv2 = 0; //vlc
+                    }
+                    if (1 /* b_mv2 isn't the last */)
+                    {
+                        if (1 /* intra_mb */)
+                            ac_pred = get_bits(&v->gb, 1);
+                        GET_MQUANT();
+                    }
+                }
+            }
+            //End1
+            /* FIXME getting tired, commenting */
+#if 0
+            if (v->ttmbf)
+                v->ttmb = get_bits(&v->gb, n); //vlc
+#endif
+        }
+        //End2
+        for (i=0; i<6; i++)
+        {
+            /* FIXME: process the block */
+        }
+
+        current_mb++;
+    }
+    return 0;
+}
+
+#if HAS_ADVANCED_PROFILE
+static int advanced_decode_i_mbs(VC9Context *v)
+{
+  int i, x, y, cbpcy, mqdiff, absmq, mquant, ac_pred, condover,
+    current_mb = 0, over_flags_mb = 0;
+
+    for (y=0; y<v->height_mb; y++)
+    {
+        for (x=0; x<v->width_mb; x++)
+        {
+            if (v->ac_pred_plane[i])
+                ac_pred = get_bits(&v->gb, 1);
+            if (condover == 3 && v->over_flags_plane)
+                over_flags_mb = get_bits(&v->gb, 1);
+            GET_MQUANT();
+        }
+        current_mb++;
+    }
+    return 0;
+}
+#endif
+
+static int vc9_decode_init(AVCodecContext *avctx)
+{
+    VC9Context *v = avctx->priv_data;
+    GetBitContext gb;
+
+    if (!avctx->extradata_size || !avctx->extradata) return -1;
+    avctx->pix_fmt = PIX_FMT_YUV420P;
+    v->avctx = avctx;
+
+    if (init_common(v) < 0) return -1;
+
+    if (avctx->codec_id == CODEC_ID_WMV3)
+    {
+        int count = 0;
+
+	// looks like WMV3 has a sequence header stored in the extradata
+	// advanced sequence header may be before the first frame
+	// the last byte of the extradata is a version number, 1 for the
+	// samples we can decode
+
+	init_get_bits(&gb, avctx->extradata, avctx->extradata_size);
+	
+	decode_sequence_header(avctx, &gb);
+
+	count = avctx->extradata_size*8 - get_bits_count(&gb);
+	if (count>0)
+	{
+    	    av_log(avctx, AV_LOG_INFO, "Extra data: %i bits left, value: %X\n",
+               count, get_bits(&gb, count));
+	}
+	else
+	{
+    	    av_log(avctx, AV_LOG_INFO, "Read %i bits in overflow\n", -count);
+	}
+    }
+
+    /* Done with header parsing */
+    //FIXME I feel like this is wrong
+    v->width_mb = (avctx->coded_width+15)>>4;
+    v->height_mb = (avctx->coded_height+15)>>4;
+
+    /* Allocate mb bitplanes */
+    v->mv_type_mb_plane = (uint8_t *)av_malloc(v->width_mb*v->height_mb);
+    if (!v->mv_type_mb_plane) return -1;
+    v->skip_mb_plane = (uint8_t *)av_malloc(v->width_mb*v->height_mb);
+    if (!v->skip_mb_plane) return -1;
+    v->direct_mb_plane = (uint8_t *)av_malloc(v->width_mb*v->height_mb);
+    if (!v->direct_mb_plane) return -1;
+
+#if HAS_ADVANCED_PROFILE
+    if (v->profile > PROFILE_MAIN)
+    {
+        v->over_flags_plane = (uint8_t *)av_malloc(v->width_mb*v->height_mb);
+        if (!v->over_flags_plane) return -1;
+        v->ac_pred_plane = (uint8_t *)av_malloc(v->width_mb*v->height_mb);
+        if (!v->ac_pred_plane) return -1;
+    }
+#endif
+
+    return 0;
+}
+
+static int vc9_decode_frame(AVCodecContext *avctx,
+                            void *data, int *data_size,
+                            uint8_t *buf, int buf_size)
+{
+    VC9Context *v = avctx->priv_data;
+    int ret = FRAME_SKIPED, len, start_code;
+    AVFrame *pict = data;
+    uint8_t *tmp_buf;
+    v->avctx = avctx;
+
+    //buf_size = 0 -> last frame
+    if (!buf_size) return 0;
+
+    len = avpicture_get_size(avctx->pix_fmt, avctx->width,
+                             avctx->height);
+    tmp_buf = (uint8_t *)av_mallocz(len);
+    avpicture_fill((AVPicture *)pict, tmp_buf, avctx->pix_fmt,
+                   avctx->width, avctx->height);
+
+    if (avctx->codec_id == CODEC_ID_WMV3)
+    {
+	init_get_bits(&v->gb, buf, buf_size*8);
+	av_log(avctx, AV_LOG_INFO, "Frame: %i bits to decode\n", buf_size*8);
+        
+#if HAS_ADVANCED_PROFILE
+	if (v->profile > PROFILE_MAIN)
+	{
+    	    if (advanced_decode_picture_header(v) == FRAME_SKIPED) return buf_size;
+    	    switch(v->pict_type)
+    	    {
+    		case I_TYPE: ret = advanced_decode_i_mbs(v); break;
+	        case P_TYPE: ret = decode_p_mbs(v); break;
+    		case B_TYPE:
+    		case BI_TYPE: ret = decode_b_mbs(v); break;
+    		default: ret = FRAME_SKIPED;
+    	    }
+    	    if (ret == FRAME_SKIPED) return buf_size; //We ignore for now failures
+	}
+	else
+#endif
+	{
+    	    if (standard_decode_picture_header(v) == FRAME_SKIPED) return buf_size;
+    	    switch(v->pict_type)
+	    {
+    		case I_TYPE: ret = standard_decode_i_mbs(v); break;
+    		case P_TYPE: ret = decode_p_mbs(v); break;
+    		case B_TYPE:
+    		case BI_TYPE: ret = decode_b_mbs(v); break;
+    		default: ret = FRAME_SKIPED;
+    	    }
+    	    if (ret == FRAME_SKIPED) return buf_size;
+	}
+
+	/* Size of the output data = image */
+	av_log(avctx, AV_LOG_DEBUG, "Consumed %i/%i bits\n",
+           get_bits_count(&v->gb), buf_size*8);
+    }
+    else
+    {
+#if 0
+	// search for IDU's
+	// FIXME
+	uint32_t scp = 0;
+	int scs = 0, i = 0;
+
+	while (i < buf_size)
+	{
+	    for (; i < buf_size && scp != 0x000001; i++)
+		scp = ((scp<<8)|buf[i])&0xffffff;
+
+	    if (scp != 0x000001)
+		break; // eof ?
+	
+	    scs = buf[i++];	
+
+	    init_get_bits(&v->gb, buf+i, (buf_size-i)*8);
+	
+	    switch(scs)
+	    {
+		case 0xf:
+		    decode_sequence_header(avctx, &v->gb);
+		    break;
+		// to be finished
+	    }
+	    
+	    i += get_bits_count(&v->gb)*8;
+	}
+#else
+	av_abort();
+#endif
+    }
+
+    *data_size = len;
+
+    /* Fake consumption of all data */
+    return buf_size; //Number of bytes consumed
+}
+
+static int vc9_decode_end(AVCodecContext *avctx)
+{
+    VC9Context *v = avctx->priv_data;
+
+#if HAS_ADVANCED_PROFILE
+    if (v->hrd_rate) av_free(v->hrd_rate);
+    if (v->hrd_buffer) av_free(v->hrd_buffer);
+#endif
+    if (v->mv_type_mb_plane) av_free(v->mv_type_mb_plane);
+    if (v->skip_mb_plane) av_free(v->skip_mb_plane);
+    if (v->direct_mb_plane) av_free(v->direct_mb_plane);
+    return 0;
+}
+
+AVCodec vc9_decoder = {
+    "vc9",
+    CODEC_TYPE_VIDEO,
+    CODEC_ID_VC9,
+    sizeof(VC9Context),
+    vc9_decode_init,
+    NULL,
+    vc9_decode_end,
+    vc9_decode_frame,
+    0,
+    NULL
+};
+
+AVCodec wmv3_decoder = {
+    "wmv3",
+    CODEC_TYPE_VIDEO,
+    CODEC_ID_WMV3,
+    sizeof(VC9Context),
+    vc9_decode_init,
+    NULL,
+    vc9_decode_end,
+    vc9_decode_frame,
+    0,
+    NULL
+};