[g3dvl] Implement MPEG2 VLD

Based uppon xine's slice_xvmc.c.
This gets VDPAU up and running.

5 files changed, 2189 insertions, 0 deletions

diff --git a/src/gallium/auxiliary/vl/vl_mpeg12_bitstream.c b/src/gallium/auxiliary/vl/vl_mpeg12_bitstream.c
new file mode 100644
index 00000000000..8955ad5175b
--- /dev/null
+++ b/src/gallium/auxiliary/vl/vl_mpeg12_bitstream.c
@@ -0,0 +1,1962 @@
+/**************************************************************************
+ *
+ * Copyright 2011 Christian König.
+ * All Rights Reserved.
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the
+ * "Software"), to deal in the Software without restriction, including
+ * without limitation the rights to use, copy, modify, merge, publish,
+ * distribute, sub license, and/or sell copies of the Software, and to
+ * permit persons to whom the Software is furnished to do so, subject to
+ * the following conditions:
+ *
+ * The above copyright notice and this permission notice (including the
+ * next paragraph) shall be included in all copies or substantial portions
+ * of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
+ * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT.
+ * IN NO EVENT SHALL TUNGSTEN GRAPHICS AND/OR ITS SUPPLIERS BE LIABLE FOR
+ * ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
+ * TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
+ * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+ *
+ **************************************************************************/
+
+/**
+ * This file is based uppon slice_xvmc.c and vlc.h from the xine project,
+ * which in turn is based on mpeg2dec. The following is the original copyright:
+ *
+ * Copyright (C) 2000-2002 Michel Lespinasse <[email protected]>
+ * Copyright (C) 1999-2000 Aaron Holtzman <[email protected]>
+ *
+ * This file is part of mpeg2dec, a free MPEG-2 video stream decoder.
+ * See http://libmpeg2.sourceforge.net/ for updates.
+ *
+ * mpeg2dec is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * mpeg2dec 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 General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
+ */
+
+#include <stdint.h>
+
+#include <pipe/p_video_state.h>
+
+#include "vl_vlc.h"
+#include "vl_mpeg12_bitstream.h"
+
+/* take num bits from the high part of bit_buf and zero extend them */
+#define UBITS(buf,num) (((uint32_t)(buf)) >> (32 - (num)))
+
+/* take num bits from the high part of bit_buf and sign extend them */
+#define SBITS(buf,num) (((int32_t)(buf)) >> (32 - (num)))
+
+#define SATURATE(val)			\
+do {					\
+   if ((uint32_t)(val + 2048) > 4095)	\
+      val = (val > 0) ? 2047 : -2048;	\
+} while (0)
+
+/* macroblock modes */
+#define MACROBLOCK_INTRA 1
+#define MACROBLOCK_PATTERN 2
+#define MACROBLOCK_MOTION_BACKWARD 4
+#define MACROBLOCK_MOTION_FORWARD 8
+#define MACROBLOCK_QUANT 16
+#define DCT_TYPE_INTERLACED 32
+
+/* motion_type */
+#define MOTION_TYPE_MASK (3*64)
+#define MOTION_TYPE_BASE 64
+#define MC_FIELD (1*64)
+#define MC_FRAME (2*64)
+#define MC_16X8 (2*64)
+#define MC_DMV (3*64)
+
+/* picture structure */
+#define TOP_FIELD     1
+#define BOTTOM_FIELD  2
+#define FRAME_PICTURE 3
+
+/* picture coding type (mpeg2 header) */
+#define I_TYPE 1
+#define P_TYPE 2
+#define B_TYPE 3
+#define D_TYPE 4
+
+typedef struct {
+   uint8_t modes;
+   uint8_t len;
+} MBtab;
+
+typedef struct {
+   uint8_t delta;
+   uint8_t len;
+} MVtab;
+
+typedef struct {
+   int8_t dmv;
+   uint8_t len;
+} DMVtab;
+
+typedef struct {
+   uint8_t cbp;
+   uint8_t len;
+} CBPtab;
+
+typedef struct {
+   uint8_t size;
+   uint8_t len;
+} DCtab;
+
+typedef struct {
+   uint8_t run;
+   uint8_t level;
+   uint8_t len;
+} DCTtab;
+
+typedef struct {
+   uint8_t mba;
+   uint8_t len;
+} MBAtab;
+
+#define INTRA MACROBLOCK_INTRA
+#define QUANT MACROBLOCK_QUANT
+#define MC MACROBLOCK_MOTION_FORWARD
+#define CODED MACROBLOCK_PATTERN
+#define FWD MACROBLOCK_MOTION_FORWARD
+#define BWD MACROBLOCK_MOTION_BACKWARD
+#define INTER MACROBLOCK_MOTION_FORWARD|MACROBLOCK_MOTION_BACKWARD
+
+static const MBtab MB_I [] = {
+   {INTRA|QUANT, 2}, {INTRA, 1}
+};
+
+static const MBtab MB_P [] = {
+   {INTRA|QUANT, 6}, {CODED|QUANT, 5}, {MC|CODED|QUANT, 5}, {INTRA,    5},
+   {MC,          3}, {MC,          3}, {MC,             3}, {MC,       3},
+   {CODED,       2}, {CODED,       2}, {CODED,          2}, {CODED,    2},
+   {CODED,       2}, {CODED,       2}, {CODED,          2}, {CODED,    2},
+   {MC|CODED,    1}, {MC|CODED,    1}, {MC|CODED,       1}, {MC|CODED, 1},
+   {MC|CODED,    1}, {MC|CODED,    1}, {MC|CODED,       1}, {MC|CODED, 1},
+   {MC|CODED,    1}, {MC|CODED,    1}, {MC|CODED,       1}, {MC|CODED, 1},
+   {MC|CODED,    1}, {MC|CODED,    1}, {MC|CODED,       1}, {MC|CODED, 1}
+};
+
+static const MBtab MB_B [] = {
+   {0,                 0}, {INTRA|QUANT,       6},
+   {BWD|CODED|QUANT,   6}, {FWD|CODED|QUANT,   6},
+   {INTER|CODED|QUANT, 5}, {INTER|CODED|QUANT, 5},
+                                     {INTRA,       5}, {INTRA,       5},
+   {FWD,         4}, {FWD,         4}, {FWD,         4}, {FWD,         4},
+   {FWD|CODED,   4}, {FWD|CODED,   4}, {FWD|CODED,   4}, {FWD|CODED,   4},
+   {BWD,         3}, {BWD,         3}, {BWD,         3}, {BWD,         3},
+   {BWD,         3}, {BWD,         3}, {BWD,         3}, {BWD,         3},
+   {BWD|CODED,   3}, {BWD|CODED,   3}, {BWD|CODED,   3}, {BWD|CODED,   3},
+   {BWD|CODED,   3}, {BWD|CODED,   3}, {BWD|CODED,   3}, {BWD|CODED,   3},
+   {INTER,       2}, {INTER,       2}, {INTER,       2}, {INTER,       2},
+   {INTER,       2}, {INTER,       2}, {INTER,       2}, {INTER,       2},
+   {INTER,       2}, {INTER,       2}, {INTER,       2}, {INTER,       2},
+   {INTER,       2}, {INTER,       2}, {INTER,       2}, {INTER,       2},
+   {INTER|CODED, 2}, {INTER|CODED, 2}, {INTER|CODED, 2}, {INTER|CODED, 2},
+   {INTER|CODED, 2}, {INTER|CODED, 2}, {INTER|CODED, 2}, {INTER|CODED, 2},
+   {INTER|CODED, 2}, {INTER|CODED, 2}, {INTER|CODED, 2}, {INTER|CODED, 2},
+   {INTER|CODED, 2}, {INTER|CODED, 2}, {INTER|CODED, 2}, {INTER|CODED, 2}
+};
+
+#undef INTRA
+#undef QUANT
+#undef MC
+#undef CODED
+#undef FWD
+#undef BWD
+#undef INTER
+
+static const MVtab MV_4 [] = {
+   { 3, 6}, { 2, 4}, { 1, 3}, { 1, 3}, { 0, 2}, { 0, 2}, { 0, 2}, { 0, 2}
+};
+
+static const MVtab MV_10 [] = {
+   { 0,10}, { 0,10}, { 0,10}, { 0,10}, { 0,10}, { 0,10}, { 0,10}, { 0,10},
+   { 0,10}, { 0,10}, { 0,10}, { 0,10}, {15,10}, {14,10}, {13,10}, {12,10},
+   {11,10}, {10,10}, { 9, 9}, { 9, 9}, { 8, 9}, { 8, 9}, { 7, 9}, { 7, 9},
+   { 6, 7}, { 6, 7}, { 6, 7}, { 6, 7}, { 6, 7}, { 6, 7}, { 6, 7}, { 6, 7},
+   { 5, 7}, { 5, 7}, { 5, 7}, { 5, 7}, { 5, 7}, { 5, 7}, { 5, 7}, { 5, 7},
+   { 4, 7}, { 4, 7}, { 4, 7}, { 4, 7}, { 4, 7}, { 4, 7}, { 4, 7}, { 4, 7}
+};
+
+static const DMVtab DMV_2 [] = {
+   { 0, 1}, { 0, 1}, { 1, 2}, {-1, 2}
+};
+
+static const CBPtab CBP_7 [] = {
+   {0x22, 7}, {0x12, 7}, {0x0a, 7}, {0x06, 7},
+   {0x21, 7}, {0x11, 7}, {0x09, 7}, {0x05, 7},
+   {0x3f, 6}, {0x3f, 6}, {0x03, 6}, {0x03, 6},
+   {0x24, 6}, {0x24, 6}, {0x18, 6}, {0x18, 6},
+   {0x3e, 5}, {0x3e, 5}, {0x3e, 5}, {0x3e, 5},
+   {0x02, 5}, {0x02, 5}, {0x02, 5}, {0x02, 5},
+   {0x3d, 5}, {0x3d, 5}, {0x3d, 5}, {0x3d, 5},
+   {0x01, 5}, {0x01, 5}, {0x01, 5}, {0x01, 5},
+   {0x38, 5}, {0x38, 5}, {0x38, 5}, {0x38, 5},
+   {0x34, 5}, {0x34, 5}, {0x34, 5}, {0x34, 5},
+   {0x2c, 5}, {0x2c, 5}, {0x2c, 5}, {0x2c, 5},
+   {0x1c, 5}, {0x1c, 5}, {0x1c, 5}, {0x1c, 5},
+   {0x28, 5}, {0x28, 5}, {0x28, 5}, {0x28, 5},
+   {0x14, 5}, {0x14, 5}, {0x14, 5}, {0x14, 5},
+   {0x30, 5}, {0x30, 5}, {0x30, 5}, {0x30, 5},
+   {0x0c, 5}, {0x0c, 5}, {0x0c, 5}, {0x0c, 5},
+   {0x20, 4}, {0x20, 4}, {0x20, 4}, {0x20, 4},
+   {0x20, 4}, {0x20, 4}, {0x20, 4}, {0x20, 4},
+   {0x10, 4}, {0x10, 4}, {0x10, 4}, {0x10, 4},
+   {0x10, 4}, {0x10, 4}, {0x10, 4}, {0x10, 4},
+   {0x08, 4}, {0x08, 4}, {0x08, 4}, {0x08, 4},
+   {0x08, 4}, {0x08, 4}, {0x08, 4}, {0x08, 4},
+   {0x04, 4}, {0x04, 4}, {0x04, 4}, {0x04, 4},
+   {0x04, 4}, {0x04, 4}, {0x04, 4}, {0x04, 4},
+   {0x3c, 3}, {0x3c, 3}, {0x3c, 3}, {0x3c, 3},
+   {0x3c, 3}, {0x3c, 3}, {0x3c, 3}, {0x3c, 3},
+   {0x3c, 3}, {0x3c, 3}, {0x3c, 3}, {0x3c, 3},
+   {0x3c, 3}, {0x3c, 3}, {0x3c, 3}, {0x3c, 3}
+};
+
+static const CBPtab CBP_9 [] = {
+   {0,    0}, {0x00, 9}, {0x27, 9}, {0x1b, 9},
+   {0x3b, 9}, {0x37, 9}, {0x2f, 9}, {0x1f, 9},
+   {0x3a, 8}, {0x3a, 8}, {0x36, 8}, {0x36, 8},
+   {0x2e, 8}, {0x2e, 8}, {0x1e, 8}, {0x1e, 8},
+   {0x39, 8}, {0x39, 8}, {0x35, 8}, {0x35, 8},
+   {0x2d, 8}, {0x2d, 8}, {0x1d, 8}, {0x1d, 8},
+   {0x26, 8}, {0x26, 8}, {0x1a, 8}, {0x1a, 8},
+   {0x25, 8}, {0x25, 8}, {0x19, 8}, {0x19, 8},
+   {0x2b, 8}, {0x2b, 8}, {0x17, 8}, {0x17, 8},
+   {0x33, 8}, {0x33, 8}, {0x0f, 8}, {0x0f, 8},
+   {0x2a, 8}, {0x2a, 8}, {0x16, 8}, {0x16, 8},
+   {0x32, 8}, {0x32, 8}, {0x0e, 8}, {0x0e, 8},
+   {0x29, 8}, {0x29, 8}, {0x15, 8}, {0x15, 8},
+   {0x31, 8}, {0x31, 8}, {0x0d, 8}, {0x0d, 8},
+   {0x23, 8}, {0x23, 8}, {0x13, 8}, {0x13, 8},
+   {0x0b, 8}, {0x0b, 8}, {0x07, 8}, {0x07, 8}
+};
+
+static const DCtab DC_lum_5 [] = {
+   {1, 2}, {1, 2}, {1, 2}, {1, 2}, {1, 2}, {1, 2}, {1, 2}, {1, 2},
+   {2, 2}, {2, 2}, {2, 2}, {2, 2}, {2, 2}, {2, 2}, {2, 2}, {2, 2},
+   {0, 3}, {0, 3}, {0, 3}, {0, 3}, {3, 3}, {3, 3}, {3, 3}, {3, 3},
+   {4, 3}, {4, 3}, {4, 3}, {4, 3}, {5, 4}, {5, 4}, {6, 5}
+};
+
+static const DCtab DC_chrom_5 [] = {
+   {0, 2}, {0, 2}, {0, 2}, {0, 2}, {0, 2}, {0, 2}, {0, 2}, {0, 2},
+   {1, 2}, {1, 2}, {1, 2}, {1, 2}, {1, 2}, {1, 2}, {1, 2}, {1, 2},
+   {2, 2}, {2, 2}, {2, 2}, {2, 2}, {2, 2}, {2, 2}, {2, 2}, {2, 2},
+   {3, 3}, {3, 3}, {3, 3}, {3, 3}, {4, 4}, {4, 4}, {5, 5}
+};
+
+static const DCtab DC_long [] = {
+   {6, 5}, {6, 5}, {6, 5}, {6, 5}, {6, 5}, {6, 5}, { 6, 5}, { 6, 5},
+   {6, 5}, {6, 5}, {6, 5}, {6, 5}, {6, 5}, {6, 5}, { 6, 5}, { 6, 5},
+   {7, 6}, {7, 6}, {7, 6}, {7, 6}, {7, 6}, {7, 6}, { 7, 6}, { 7, 6},
+   {8, 7}, {8, 7}, {8, 7}, {8, 7}, {9, 8}, {9, 8}, {10, 9}, {11, 9}
+};
+
+static const DCTtab DCT_16 [] = {
+   {129, 0, 0}, {129, 0, 0}, {129, 0, 0}, {129, 0, 0},
+   {129, 0, 0}, {129, 0, 0}, {129, 0, 0}, {129, 0, 0},
+   {129, 0, 0}, {129, 0, 0}, {129, 0, 0}, {129, 0, 0},
+   {129, 0, 0}, {129, 0, 0}, {129, 0, 0}, {129, 0, 0},
+   {  2,18, 0}, {  2,17, 0}, {  2,16, 0}, {  2,15, 0},
+   {  7, 3, 0}, { 17, 2, 0}, { 16, 2, 0}, { 15, 2, 0},
+   { 14, 2, 0}, { 13, 2, 0}, { 12, 2, 0}, { 32, 1, 0},
+   { 31, 1, 0}, { 30, 1, 0}, { 29, 1, 0}, { 28, 1, 0}
+};
+
+static const DCTtab DCT_15 [] = {
+   {  1,40,15}, {  1,39,15}, {  1,38,15}, {  1,37,15},
+   {  1,36,15}, {  1,35,15}, {  1,34,15}, {  1,33,15},
+   {  1,32,15}, {  2,14,15}, {  2,13,15}, {  2,12,15},
+   {  2,11,15}, {  2,10,15}, {  2, 9,15}, {  2, 8,15},
+   {  1,31,14}, {  1,31,14}, {  1,30,14}, {  1,30,14},
+   {  1,29,14}, {  1,29,14}, {  1,28,14}, {  1,28,14},
+   {  1,27,14}, {  1,27,14}, {  1,26,14}, {  1,26,14},
+   {  1,25,14}, {  1,25,14}, {  1,24,14}, {  1,24,14},
+   {  1,23,14}, {  1,23,14}, {  1,22,14}, {  1,22,14},
+   {  1,21,14}, {  1,21,14}, {  1,20,14}, {  1,20,14},
+   {  1,19,14}, {  1,19,14}, {  1,18,14}, {  1,18,14},
+   {  1,17,14}, {  1,17,14}, {  1,16,14}, {  1,16,14}
+};
+
+static const DCTtab DCT_13 [] = {
+   { 11, 2,13}, { 10, 2,13}, {  6, 3,13}, {  4, 4,13},
+   {  3, 5,13}, {  2, 7,13}, {  2, 6,13}, {  1,15,13},
+   {  1,14,13}, {  1,13,13}, {  1,12,13}, { 27, 1,13},
+   { 26, 1,13}, { 25, 1,13}, { 24, 1,13}, { 23, 1,13},
+   {  1,11,12}, {  1,11,12}, {  9, 2,12}, {  9, 2,12},
+   {  5, 3,12}, {  5, 3,12}, {  1,10,12}, {  1,10,12},
+   {  3, 4,12}, {  3, 4,12}, {  8, 2,12}, {  8, 2,12},
+   { 22, 1,12}, { 22, 1,12}, { 21, 1,12}, { 21, 1,12},
+   {  1, 9,12}, {  1, 9,12}, { 20, 1,12}, { 20, 1,12},
+   { 19, 1,12}, { 19, 1,12}, {  2, 5,12}, {  2, 5,12},
+   {  4, 3,12}, {  4, 3,12}, {  1, 8,12}, {  1, 8,12},
+   {  7, 2,12}, {  7, 2,12}, { 18, 1,12}, { 18, 1,12}
+};
+
+static const DCTtab DCT_B14_10 [] = {
+   { 17, 1,10}, {  6, 2,10}, {  1, 7,10}, {  3, 3,10},
+   {  2, 4,10}, { 16, 1,10}, { 15, 1,10}, {  5, 2,10}
+};
+
+static const DCTtab DCT_B14_8 [] = {
+   { 65, 0, 6}, { 65, 0, 6}, { 65, 0, 6}, { 65, 0, 6},
+   {  3, 2, 7}, {  3, 2, 7}, { 10, 1, 7}, { 10, 1, 7},
+   {  1, 4, 7}, {  1, 4, 7}, {  9, 1, 7}, {  9, 1, 7},
+   {  8, 1, 6}, {  8, 1, 6}, {  8, 1, 6}, {  8, 1, 6},
+   {  7, 1, 6}, {  7, 1, 6}, {  7, 1, 6}, {  7, 1, 6},
+   {  2, 2, 6}, {  2, 2, 6}, {  2, 2, 6}, {  2, 2, 6},
+   {  6, 1, 6}, {  6, 1, 6}, {  6, 1, 6}, {  6, 1, 6},
+   { 14, 1, 8}, {  1, 6, 8}, { 13, 1, 8}, { 12, 1, 8},
+   {  4, 2, 8}, {  2, 3, 8}, {  1, 5, 8}, { 11, 1, 8}
+};
+
+static const DCTtab DCT_B14AC_5 [] = {
+                {  1, 3, 5}, {  5, 1, 5}, {  4, 1, 5},
+   {  1, 2, 4}, {  1, 2, 4}, {  3, 1, 4}, {  3, 1, 4},
+   {  2, 1, 3}, {  2, 1, 3}, {  2, 1, 3}, {  2, 1, 3},
+   {129, 0, 2}, {129, 0, 2}, {129, 0, 2}, {129, 0, 2},
+   {129, 0, 2}, {129, 0, 2}, {129, 0, 2}, {129, 0, 2},
+   {  1, 1, 2}, {  1, 1, 2}, {  1, 1, 2}, {  1, 1, 2},
+   {  1, 1, 2}, {  1, 1, 2}, {  1, 1, 2}, {  1, 1, 2}
+};
+
+static const DCTtab DCT_B14DC_5 [] = {
+                {  1, 3, 5}, {  5, 1, 5}, {  4, 1, 5},
+   {  1, 2, 4}, {  1, 2, 4}, {  3, 1, 4}, {  3, 1, 4},
+   {  2, 1, 3}, {  2, 1, 3}, {  2, 1, 3}, {  2, 1, 3},
+   {  1, 1, 1}, {  1, 1, 1}, {  1, 1, 1}, {  1, 1, 1},
+   {  1, 1, 1}, {  1, 1, 1}, {  1, 1, 1}, {  1, 1, 1},
+   {  1, 1, 1}, {  1, 1, 1}, {  1, 1, 1}, {  1, 1, 1},
+   {  1, 1, 1}, {  1, 1, 1}, {  1, 1, 1}, {  1, 1, 1}
+};
+
+static const DCTtab DCT_B15_10 [] = {
+   {  6, 2, 9}, {  6, 2, 9}, { 15, 1, 9}, { 15, 1, 9},
+   {  3, 4,10}, { 17, 1,10}, { 16, 1, 9}, { 16, 1, 9}
+};
+
+static const DCTtab DCT_B15_8 [] = {
+   { 65, 0, 6}, { 65, 0, 6}, { 65, 0, 6}, { 65, 0, 6},
+   {  8, 1, 7}, {  8, 1, 7}, {  9, 1, 7}, {  9, 1, 7},
+   {  7, 1, 7}, {  7, 1, 7}, {  3, 2, 7}, {  3, 2, 7},
+   {  1, 7, 6}, {  1, 7, 6}, {  1, 7, 6}, {  1, 7, 6},
+   {  1, 6, 6}, {  1, 6, 6}, {  1, 6, 6}, {  1, 6, 6},
+   {  5, 1, 6}, {  5, 1, 6}, {  5, 1, 6}, {  5, 1, 6},
+   {  6, 1, 6}, {  6, 1, 6}, {  6, 1, 6}, {  6, 1, 6},
+   {  2, 5, 8}, { 12, 1, 8}, {  1,11, 8}, {  1,10, 8},
+   { 14, 1, 8}, { 13, 1, 8}, {  4, 2, 8}, {  2, 4, 8},
+   {  3, 1, 5}, {  3, 1, 5}, {  3, 1, 5}, {  3, 1, 5},
+   {  3, 1, 5}, {  3, 1, 5}, {  3, 1, 5}, {  3, 1, 5},
+   {  2, 2, 5}, {  2, 2, 5}, {  2, 2, 5}, {  2, 2, 5},
+   {  2, 2, 5}, {  2, 2, 5}, {  2, 2, 5}, {  2, 2, 5},
+   {  4, 1, 5}, {  4, 1, 5}, {  4, 1, 5}, {  4, 1, 5},
+   {  4, 1, 5}, {  4, 1, 5}, {  4, 1, 5}, {  4, 1, 5},
+   {  2, 1, 3}, {  2, 1, 3}, {  2, 1, 3}, {  2, 1, 3},
+   {  2, 1, 3}, {  2, 1, 3}, {  2, 1, 3}, {  2, 1, 3},
+   {  2, 1, 3}, {  2, 1, 3}, {  2, 1, 3}, {  2, 1, 3},
+   {  2, 1, 3}, {  2, 1, 3}, {  2, 1, 3}, {  2, 1, 3},
+   {  2, 1, 3}, {  2, 1, 3}, {  2, 1, 3}, {  2, 1, 3},
+   {  2, 1, 3}, {  2, 1, 3}, {  2, 1, 3}, {  2, 1, 3},
+   {  2, 1, 3}, {  2, 1, 3}, {  2, 1, 3}, {  2, 1, 3},
+   {  2, 1, 3}, {  2, 1, 3}, {  2, 1, 3}, {  2, 1, 3},
+   {129, 0, 4}, {129, 0, 4}, {129, 0, 4}, {129, 0, 4},
+   {129, 0, 4}, {129, 0, 4}, {129, 0, 4}, {129, 0, 4},
+   {129, 0, 4}, {129, 0, 4}, {129, 0, 4}, {129, 0, 4},
+   {129, 0, 4}, {129, 0, 4}, {129, 0, 4}, {129, 0, 4},
+   {  1, 3, 4}, {  1, 3, 4}, {  1, 3, 4}, {  1, 3, 4},
+   {  1, 3, 4}, {  1, 3, 4}, {  1, 3, 4}, {  1, 3, 4},
+   {  1, 3, 4}, {  1, 3, 4}, {  1, 3, 4}, {  1, 3, 4},
+   {  1, 3, 4}, {  1, 3, 4}, {  1, 3, 4}, {  1, 3, 4},
+   {  1, 1, 2}, {  1, 1, 2}, {  1, 1, 2}, {  1, 1, 2},
+   {  1, 1, 2}, {  1, 1, 2}, {  1, 1, 2}, {  1, 1, 2},
+   {  1, 1, 2}, {  1, 1, 2}, {  1, 1, 2}, {  1, 1, 2},
+   {  1, 1, 2}, {  1, 1, 2}, {  1, 1, 2}, {  1, 1, 2},
+   {  1, 1, 2}, {  1, 1, 2}, {  1, 1, 2}, {  1, 1, 2},
+   {  1, 1, 2}, {  1, 1, 2}, {  1, 1, 2}, {  1, 1, 2},
+   {  1, 1, 2}, {  1, 1, 2}, {  1, 1, 2}, {  1, 1, 2},
+   {  1, 1, 2}, {  1, 1, 2}, {  1, 1, 2}, {  1, 1, 2},
+   {  1, 1, 2}, {  1, 1, 2}, {  1, 1, 2}, {  1, 1, 2},
+   {  1, 1, 2}, {  1, 1, 2}, {  1, 1, 2}, {  1, 1, 2},
+   {  1, 1, 2}, {  1, 1, 2}, {  1, 1, 2}, {  1, 1, 2},
+   {  1, 1, 2}, {  1, 1, 2}, {  1, 1, 2}, {  1, 1, 2},
+   {  1, 1, 2}, {  1, 1, 2}, {  1, 1, 2}, {  1, 1, 2},
+   {  1, 1, 2}, {  1, 1, 2}, {  1, 1, 2}, {  1, 1, 2},
+   {  1, 1, 2}, {  1, 1, 2}, {  1, 1, 2}, {  1, 1, 2},
+   {  1, 1, 2}, {  1, 1, 2}, {  1, 1, 2}, {  1, 1, 2},
+   {  1, 2, 3}, {  1, 2, 3}, {  1, 2, 3}, {  1, 2, 3},
+   {  1, 2, 3}, {  1, 2, 3}, {  1, 2, 3}, {  1, 2, 3},
+   {  1, 2, 3}, {  1, 2, 3}, {  1, 2, 3}, {  1, 2, 3},
+   {  1, 2, 3}, {  1, 2, 3}, {  1, 2, 3}, {  1, 2, 3},
+   {  1, 2, 3}, {  1, 2, 3}, {  1, 2, 3}, {  1, 2, 3},
+   {  1, 2, 3}, {  1, 2, 3}, {  1, 2, 3}, {  1, 2, 3},
+   {  1, 2, 3}, {  1, 2, 3}, {  1, 2, 3}, {  1, 2, 3},
+   {  1, 2, 3}, {  1, 2, 3}, {  1, 2, 3}, {  1, 2, 3},
+   {  1, 4, 5}, {  1, 4, 5}, {  1, 4, 5}, {  1, 4, 5},
+   {  1, 4, 5}, {  1, 4, 5}, {  1, 4, 5}, {  1, 4, 5},
+   {  1, 5, 5}, {  1, 5, 5}, {  1, 5, 5}, {  1, 5, 5},
+   {  1, 5, 5}, {  1, 5, 5}, {  1, 5, 5}, {  1, 5, 5},
+   { 10, 1, 7}, { 10, 1, 7}, {  2, 3, 7}, {  2, 3, 7},
+   { 11, 1, 7}, { 11, 1, 7}, {  1, 8, 7}, {  1, 8, 7},
+   {  1, 9, 7}, {  1, 9, 7}, {  1,12, 8}, {  1,13, 8},
+   {  3, 3, 8}, {  5, 2, 8}, {  1,14, 8}, {  1,15, 8}
+};
+
+static const MBAtab MBA_5 [] = {
+                   {6, 5}, {5, 5}, {4, 4}, {4, 4}, {3, 4}, {3, 4},
+   {2, 3}, {2, 3}, {2, 3}, {2, 3}, {1, 3}, {1, 3}, {1, 3}, {1, 3},
+   {0, 1}, {0, 1}, {0, 1}, {0, 1}, {0, 1}, {0, 1}, {0, 1}, {0, 1},
+   {0, 1}, {0, 1}, {0, 1}, {0, 1}, {0, 1}, {0, 1}, {0, 1}, {0, 1}
+};
+
+static const MBAtab MBA_11 [] = {
+   {32, 11}, {31, 11}, {30, 11}, {29, 11},
+   {28, 11}, {27, 11}, {26, 11}, {25, 11},
+   {24, 11}, {23, 11}, {22, 11}, {21, 11},
+   {20, 10}, {20, 10}, {19, 10}, {19, 10},
+   {18, 10}, {18, 10}, {17, 10}, {17, 10},
+   {16, 10}, {16, 10}, {15, 10}, {15, 10},
+   {14,  8}, {14,  8}, {14,  8}, {14,  8},
+   {14,  8}, {14,  8}, {14,  8}, {14,  8},
+   {13,  8}, {13,  8}, {13,  8}, {13,  8},
+   {13,  8}, {13,  8}, {13,  8}, {13,  8},
+   {12,  8}, {12,  8}, {12,  8}, {12,  8},
+   {12,  8}, {12,  8}, {12,  8}, {12,  8},
+   {11,  8}, {11,  8}, {11,  8}, {11,  8},
+   {11,  8}, {11,  8}, {11,  8}, {11,  8},
+   {10,  8}, {10,  8}, {10,  8}, {10,  8},
+   {10,  8}, {10,  8}, {10,  8}, {10,  8},
+   { 9,  8}, { 9,  8}, { 9,  8}, { 9,  8},
+   { 9,  8}, { 9,  8}, { 9,  8}, { 9,  8},
+   { 8,  7}, { 8,  7}, { 8,  7}, { 8,  7},
+   { 8,  7}, { 8,  7}, { 8,  7}, { 8,  7},
+   { 8,  7}, { 8,  7}, { 8,  7}, { 8,  7},
+   { 8,  7}, { 8,  7}, { 8,  7}, { 8,  7},
+   { 7,  7}, { 7,  7}, { 7,  7}, { 7,  7},
+   { 7,  7}, { 7,  7}, { 7,  7}, { 7,  7},
+   { 7,  7}, { 7,  7}, { 7,  7}, { 7,  7},
+   { 7,  7}, { 7,  7}, { 7,  7}, { 7,  7}
+};
+
+/* original (non-patched) scan tables */
+static const uint8_t mpeg2_scan_norm_orig[64] =
+{
+   /* Zig-Zag scan pattern */
+    0, 1, 8,16, 9, 2, 3,10,
+   17,24,32,25,18,11, 4, 5,
+   12,19,26,33,40,48,41,34,
+   27,20,13, 6, 7,14,21,28,
+   35,42,49,56,57,50,43,36,
+   29,22,15,23,30,37,44,51,
+   58,59,52,45,38,31,39,46,
+   53,60,61,54,47,55,62,63
+};
+
+static const uint8_t mpeg2_scan_alt_orig[64] =
+{
+   /* Alternate scan pattern */
+   0,8,16,24,1,9,2,10,17,25,32,40,48,56,57,49,
+   41,33,26,18,3,11,4,12,19,27,34,42,50,58,35,43,
+   51,59,20,28,5,13,6,14,21,29,36,44,52,60,37,45,
+   53,61,22,30,7,15,23,31,38,46,54,62,39,47,55,63
+};
+
+static uint8_t mpeg2_scan_alt_ptable[64];
+static uint8_t mpeg2_scan_norm_ptable[64];
+static uint8_t mpeg2_scan_orig_ptable[64];
+
+static inline void
+setup_scan_ptable( void )
+{
+   int i;
+   for (i=0; i<64; ++i) {
+      mpeg2_scan_norm_ptable[mpeg2_scan_norm_orig[i]] = mpeg2_scan_norm_orig[i];
+      mpeg2_scan_alt_ptable[mpeg2_scan_alt_orig[i]] = mpeg2_scan_alt_orig[i];
+      mpeg2_scan_orig_ptable[i] = i;
+   }
+}
+
+static const int non_linear_quantizer_scale[] = {
+   0,  1,  2,  3,  4,  5,   6,   7,
+   8, 10, 12, 14, 16, 18,  20,  22,
+   24, 28, 32, 36, 40, 44,  48,  52,
+   56, 64, 72, 80, 88, 96, 104, 112
+};
+
+static inline int
+get_macroblock_modes(struct vl_mpg12_bs *bs, struct pipe_mpeg12_picture_desc * picture)
+{
+   int macroblock_modes;
+   const MBtab * tab;
+
+   switch (picture->picture_coding_type) {
+   case I_TYPE:
+
+      tab = MB_I + vl_vlc_ubits(&bs->vlc, 1);
+      vl_vlc_dumpbits(&bs->vlc, tab->len);
+      macroblock_modes = tab->modes;
+
+      if ((!(picture->frame_pred_frame_dct)) && (picture->picture_structure == FRAME_PICTURE)) {
+         macroblock_modes |= vl_vlc_ubits(&bs->vlc, 1) * DCT_TYPE_INTERLACED;
+         vl_vlc_dumpbits(&bs->vlc, 1);
+      }
+
+      return macroblock_modes;
+
+   case P_TYPE:
+
+      tab = MB_P + vl_vlc_ubits(&bs->vlc, 5);
+      vl_vlc_dumpbits(&bs->vlc, tab->len);
+      macroblock_modes = tab->modes;
+
+      if (picture->picture_structure != FRAME_PICTURE) {
+         if (macroblock_modes & MACROBLOCK_MOTION_FORWARD) {
+            macroblock_modes |= vl_vlc_ubits(&bs->vlc, 2) * MOTION_TYPE_BASE;
+            vl_vlc_dumpbits(&bs->vlc, 2);
+          }
+          return macroblock_modes;
+      } else if (picture->frame_pred_frame_dct) {
+          if (macroblock_modes & MACROBLOCK_MOTION_FORWARD)
+            macroblock_modes |= MC_FRAME;
+          return macroblock_modes;
+      } else {
+          if (macroblock_modes & MACROBLOCK_MOTION_FORWARD) {
+            macroblock_modes |= vl_vlc_ubits(&bs->vlc, 2) * MOTION_TYPE_BASE;
+            vl_vlc_dumpbits(&bs->vlc, 2);
+          }
+          if (macroblock_modes & (MACROBLOCK_INTRA | MACROBLOCK_PATTERN)) {
+            macroblock_modes |= vl_vlc_ubits(&bs->vlc, 1) * DCT_TYPE_INTERLACED;
+            vl_vlc_dumpbits(&bs->vlc, 1);
+          }
+          return macroblock_modes;
+      }
+
+   case B_TYPE:
+
+      tab = MB_B + vl_vlc_ubits(&bs->vlc, 6);
+      vl_vlc_dumpbits(&bs->vlc, tab->len);
+      macroblock_modes = tab->modes;
+
+      if (picture->picture_structure != FRAME_PICTURE) {
+          if (! (macroblock_modes & MACROBLOCK_INTRA)) {
+            macroblock_modes |= vl_vlc_ubits(&bs->vlc, 2) * MOTION_TYPE_BASE;
+            vl_vlc_dumpbits(&bs->vlc, 2);
+          }
+          return macroblock_modes;
+      } else if (picture->frame_pred_frame_dct) {
+          /* if (! (macroblock_modes & MACROBLOCK_INTRA)) */
+          macroblock_modes |= MC_FRAME;
+          return macroblock_modes;
+      } else {
+          if (macroblock_modes & MACROBLOCK_INTRA)
+            goto intra;
+          macroblock_modes |= vl_vlc_ubits(&bs->vlc, 2) * MOTION_TYPE_BASE;
+          vl_vlc_dumpbits(&bs->vlc, 2);
+          if (macroblock_modes & (MACROBLOCK_INTRA | MACROBLOCK_PATTERN)) {
+          intra:
+            macroblock_modes |= vl_vlc_ubits(&bs->vlc, 1) * DCT_TYPE_INTERLACED;
+            vl_vlc_dumpbits(&bs->vlc, 1);
+          }
+          return macroblock_modes;
+      }
+
+   case D_TYPE:
+
+      vl_vlc_dumpbits(&bs->vlc, 1);
+      return MACROBLOCK_INTRA;
+
+   default:
+      return 0;
+   }
+}
+
+static inline int
+get_quantizer_scale(struct vl_mpg12_bs *bs, struct pipe_mpeg12_picture_desc * picture)
+{
+   int quantizer_scale_code;
+
+   quantizer_scale_code = vl_vlc_ubits(&bs->vlc, 5);
+   vl_vlc_dumpbits(&bs->vlc, 5);
+
+   if (picture->q_scale_type)
+      return non_linear_quantizer_scale[quantizer_scale_code];
+   else
+      return quantizer_scale_code << 1;
+}
+
+static inline int
+get_motion_delta(struct vl_mpg12_bs *bs, unsigned f_code)
+{
+   int delta;
+   int sign;
+   const MVtab * tab;
+
+   if (bs->vlc.buf & 0x80000000) {
+      vl_vlc_dumpbits(&bs->vlc, 1);
+      return 0;
+   } else if (bs->vlc.buf >= 0x0c000000) {
+
+      tab = MV_4 + vl_vlc_ubits(&bs->vlc, 4);
+      delta = (tab->delta << f_code) + 1;
+      bs->vlc.bits += tab->len + f_code + 1;
+      bs->vlc.buf <<= tab->len;
+
+      sign = vl_vlc_sbits(&bs->vlc, 1);
+      bs->vlc.buf <<= 1;
+
+      if (f_code)
+         delta += vl_vlc_ubits(&bs->vlc, f_code);
+      bs->vlc.buf <<= f_code;
+
+      return (delta ^ sign) - sign;
+
+   } else {
+
+      tab = MV_10 + vl_vlc_ubits(&bs->vlc, 10);
+      delta = (tab->delta << f_code) + 1;
+      bs->vlc.bits += tab->len + 1;
+      bs->vlc.buf <<= tab->len;
+
+      sign = vl_vlc_sbits(&bs->vlc, 1);
+      bs->vlc.buf <<= 1;
+
+      if (f_code) {
+         vl_vlc_needbits(&bs->vlc);
+         delta += vl_vlc_ubits(&bs->vlc, f_code);
+         vl_vlc_dumpbits(&bs->vlc, f_code);
+      }
+
+      return (delta ^ sign) - sign;
+   }
+}
+
+static inline int
+bound_motion_vector(int vec, unsigned f_code)
+{
+#if 1
+   unsigned int limit;
+   int sign;
+
+   limit = 16 << f_code;
+
+   if ((unsigned int)(vec + limit) < 2 * limit)
+      return vec;
+   else {
+      sign = ((int32_t)vec) >> 31;
+      return vec - ((2 * limit) ^ sign) + sign;
+   }
+#else
+   return ((int32_t)vec << (28 - f_code)) >> (28 - f_code);
+#endif
+}
+
+static inline int
+get_dmv(struct vl_mpg12_bs *bs)
+{
+   const DMVtab * tab;
+
+   tab = DMV_2 + vl_vlc_ubits(&bs->vlc, 2);
+   vl_vlc_dumpbits(&bs->vlc, tab->len);
+   return tab->dmv;
+}
+
+static inline int
+get_coded_block_pattern(struct vl_mpg12_bs *bs)
+{
+   const CBPtab * tab;
+
+   vl_vlc_needbits(&bs->vlc);
+
+   if (bs->vlc.buf >= 0x20000000) {
+
+      tab = CBP_7 + (vl_vlc_ubits(&bs->vlc, 7) - 16);
+      vl_vlc_dumpbits(&bs->vlc, tab->len);
+      return tab->cbp;
+
+   } else {
+
+      tab = CBP_9 + vl_vlc_ubits(&bs->vlc, 9);
+      vl_vlc_dumpbits(&bs->vlc, tab->len);
+      return tab->cbp;
+   }
+}
+
+static inline int
+get_luma_dc_dct_diff(struct vl_mpg12_bs *bs)
+{
+   const DCtab * tab;
+   int size;
+   int dc_diff;
+
+   if (bs->vlc.buf < 0xf8000000) {
+      tab = DC_lum_5 + vl_vlc_ubits(&bs->vlc, 5);
+      size = tab->size;
+      if (size) {
+         bs->vlc.bits += tab->len + size;
+         bs->vlc.buf <<= tab->len;
+         dc_diff = vl_vlc_ubits(&bs->vlc, size) - UBITS (SBITS (~bs->vlc.buf, 1), size);
+         bs->vlc.buf <<= size;
+         return dc_diff;
+      } else {
+         vl_vlc_dumpbits(&bs->vlc, 3);
+         return 0;
+      }
+   } else {
+      tab = DC_long + (vl_vlc_ubits(&bs->vlc, 9) - 0x1e0);
+      size = tab->size;
+      vl_vlc_dumpbits(&bs->vlc, tab->len);
+      vl_vlc_needbits(&bs->vlc);
+      dc_diff = vl_vlc_ubits(&bs->vlc, size) - UBITS (SBITS (~bs->vlc.buf, 1), size);
+      vl_vlc_dumpbits(&bs->vlc, size);
+      return dc_diff;
+   }
+}
+
+static inline int
+get_chroma_dc_dct_diff(struct vl_mpg12_bs *bs)
+{
+   const DCtab * tab;
+   int size;
+   int dc_diff;
+
+   if (bs->vlc.buf < 0xf8000000) {
+      tab = DC_chrom_5 + vl_vlc_ubits(&bs->vlc, 5);
+      size = tab->size;
+      if (size) {
+         bs->vlc.bits += tab->len + size;
+         bs->vlc.buf <<= tab->len;
+         dc_diff = vl_vlc_ubits(&bs->vlc, size) - UBITS (SBITS (~bs->vlc.buf, 1), size);
+         bs->vlc.buf <<= size;
+         return dc_diff;
+      } else {
+         vl_vlc_dumpbits(&bs->vlc, 2);
+         return 0;
+      }
+   } else {
+      tab = DC_long + (vl_vlc_ubits(&bs->vlc, 10) - 0x3e0);
+      size = tab->size;
+      vl_vlc_dumpbits(&bs->vlc, tab->len + 1);
+      vl_vlc_needbits(&bs->vlc);
+      dc_diff = vl_vlc_ubits(&bs->vlc, size) - UBITS (SBITS (~bs->vlc.buf, 1), size);
+      vl_vlc_dumpbits(&bs->vlc, size);
+      return dc_diff;
+   }
+}
+
+static inline void
+get_intra_block_B14(struct vl_mpg12_bs *bs, struct pipe_mpeg12_picture_desc * picture, short *dest)
+{
+   int i, j, l, val;
+   const uint8_t *scan;
+   uint8_t *scan_ptable;
+   uint8_t *quant_matrix = picture->intra_quantizer_matrix;
+   int quantizer_scale = picture->quantizer_scale;
+   int mismatch;
+   const DCTtab *tab;
+
+   if (!picture->alternate_scan) {
+      scan =  mpeg2_scan_norm_orig;
+      scan_ptable = mpeg2_scan_norm_ptable;
+   } else {
+      scan = mpeg2_scan_alt_orig;
+      scan_ptable = mpeg2_scan_alt_ptable;
+   }
+
+   i = 0;
+   mismatch = ~dest[0];
+
+   vl_vlc_needbits(&bs->vlc);
+
+   while (1) {
+      if (bs->vlc.buf >= 0x28000000) {
+
+         tab = DCT_B14AC_5 + (vl_vlc_ubits(&bs->vlc, 5) - 5);
+
+         i += tab->run;
+         if (i >= 64)
+            break;	/* end of block */
+
+      normal_code:
+         l = scan_ptable[j = scan[i]];
+
+         bs->vlc.buf <<= tab->len;
+         bs->vlc.bits += tab->len + 1;
+         val = (tab->level * quantizer_scale * quant_matrix[l]) >> 4;
+
+         /* if (bitstream_get (1)) val = -val; */
+         val = (val ^ vl_vlc_sbits(&bs->vlc, 1)) - vl_vlc_sbits(&bs->vlc, 1);
+
+         SATURATE (val);
+         dest[j] = val;
+         mismatch ^= val;
+
+         bs->vlc.buf <<= 1;
+         vl_vlc_needbits(&bs->vlc);
+
+         continue;
+
+      } else if (bs->vlc.buf >= 0x04000000) {
+
+         tab = DCT_B14_8 + (vl_vlc_ubits(&bs->vlc, 8) - 4);
+
+         i += tab->run;
+         if (i < 64)
+            goto normal_code;
+
+         /* escape code */
+
+         i += UBITS(bs->vlc.buf << 6, 6) - 64;
+         if (i >= 64)
+            break;	/* illegal, check needed to avoid buffer overflow */
+
+         l = scan_ptable[j = scan[i]];
+
+         vl_vlc_dumpbits(&bs->vlc, 12);
+         vl_vlc_needbits(&bs->vlc);
+         val = (vl_vlc_sbits(&bs->vlc, 12) * quantizer_scale * quant_matrix[l]) / 16;
+
+         SATURATE (val);
+         dest[j] = val;
+         mismatch ^= val;
+
+         vl_vlc_dumpbits(&bs->vlc, 12);
+         vl_vlc_needbits(&bs->vlc);
+
+         continue;
+
+      } else if (bs->vlc.buf >= 0x02000000) {
+         tab = DCT_B14_10 + (vl_vlc_ubits(&bs->vlc, 10) - 8);
+         i += tab->run;
+         if (i < 64)
+            goto normal_code;
+      } else if (bs->vlc.buf >= 0x00800000) {
+         tab = DCT_13 + (vl_vlc_ubits(&bs->vlc, 13) - 16);
+         i += tab->run;
+         if (i < 64)
+            goto normal_code;
+      } else if (bs->vlc.buf >= 0x00200000) {
+         tab = DCT_15 + (vl_vlc_ubits(&bs->vlc, 15) - 16);
+         i += tab->run;
+         if (i < 64)
+            goto normal_code;
+      } else {
+         tab = DCT_16 + vl_vlc_ubits(&bs->vlc, 16);
+         bs->vlc.buf <<= 16;
+         vl_vlc_getword(&bs->vlc, bs->vlc.bits + 16);
+         i += tab->run;
+         if (i < 64)
+            goto normal_code;
+      }
+      break;	/* illegal, check needed to avoid buffer overflow */
+   }
+
+   dest[63] ^= mismatch & 1;
+   vl_vlc_dumpbits(&bs->vlc, 2);	/* dump end of block code */
+}
+
+static inline void
+get_intra_block_B15(struct vl_mpg12_bs *bs, struct pipe_mpeg12_picture_desc * picture, short *dest)
+{
+   int i, j, l, val;
+   const uint8_t *scan;
+   uint8_t *scan_ptable;
+   uint8_t *quant_matrix = picture->intra_quantizer_matrix;
+   int quantizer_scale = picture->quantizer_scale;
+   int mismatch;
+   const DCTtab * tab;
+
+   if (!picture->alternate_scan) {
+      scan =  mpeg2_scan_norm_orig;
+      scan_ptable = mpeg2_scan_norm_ptable;
+   } else {
+      scan = mpeg2_scan_alt_orig;
+      scan_ptable = mpeg2_scan_alt_ptable;
+   }
+
+   i = 0;
+   mismatch = ~dest[0];
+
+   vl_vlc_needbits(&bs->vlc);
+
+   while (1) {
+      if (bs->vlc.buf >= 0x04000000) {
+
+         tab = DCT_B15_8 + (vl_vlc_ubits(&bs->vlc, 8) - 4);
+
+         i += tab->run;
+         if (i < 64) {
+
+         normal_code:
+            l = scan_ptable[j = scan[i]];
+            bs->vlc.buf <<= tab->len;
+            bs->vlc.bits += tab->len + 1;
+            val = (tab->level * quantizer_scale * quant_matrix[l]) >> 4;
+
+            /* if (bitstream_get (1)) val = -val; */
+            val = (val ^ vl_vlc_sbits(&bs->vlc, 1)) - vl_vlc_sbits(&bs->vlc, 1);
+
+            SATURATE (val);
+            dest[j] = val;
+            mismatch ^= val;
+
+            bs->vlc.buf <<= 1;
+            vl_vlc_needbits(&bs->vlc);
+
+            continue;
+
+         } else {
+
+            /* end of block. I commented out this code because if we */
+            /* dont exit here we will still exit at the later test :) */
+
+            /* if (i >= 128) break;	*/	/* end of block */
+
+            /* escape code */
+
+            i += UBITS(bs->vlc.buf << 6, 6) - 64;
+            if (i >= 64)
+                break;	/* illegal, check against buffer overflow */
+
+            l = scan_ptable[j = scan[i]];
+
+            vl_vlc_dumpbits(&bs->vlc, 12);
+            vl_vlc_needbits(&bs->vlc);
+            val = (vl_vlc_sbits(&bs->vlc, 12) * quantizer_scale * quant_matrix[l]) / 16;
+
+            SATURATE (val);
+            dest[j] = val;
+            mismatch ^= val;
+
+            vl_vlc_dumpbits(&bs->vlc, 12);
+            vl_vlc_needbits(&bs->vlc);
+
+            continue;
+
+          }
+      } else if (bs->vlc.buf >= 0x02000000) {
+         tab = DCT_B15_10 + (vl_vlc_ubits(&bs->vlc, 10) - 8);
+         i += tab->run;
+         if (i < 64)
+            goto normal_code;
+      } else if (bs->vlc.buf >= 0x00800000) {
+         tab = DCT_13 + (vl_vlc_ubits(&bs->vlc, 13) - 16);
+         i += tab->run;
+         if (i < 64)
+            goto normal_code;
+      } else if (bs->vlc.buf >= 0x00200000) {
+         tab = DCT_15 + (vl_vlc_ubits(&bs->vlc, 15) - 16);
+         i += tab->run;
+         if (i < 64)
+            goto normal_code;
+      } else {
+         tab = DCT_16 + vl_vlc_ubits(&bs->vlc, 16);
+         bs->vlc.buf <<= 16;
+         vl_vlc_getword(&bs->vlc, bs->vlc.bits + 16);
+         i += tab->run;
+         if (i < 64)
+            goto normal_code;
+      }
+      break;	/* illegal, check needed to avoid buffer overflow */
+   }
+
+   dest[63] ^= mismatch & 1;
+   vl_vlc_dumpbits(&bs->vlc, 4);	/* dump end of block code */
+}
+
+static inline void
+get_non_intra_block(struct vl_mpg12_bs *bs, struct pipe_mpeg12_picture_desc * picture, short *dest)
+{
+   int i, j, l, val;
+   const uint8_t *scan;
+   uint8_t *scan_ptable;
+   uint8_t *quant_matrix = picture->non_intra_quantizer_matrix;
+   int quantizer_scale = picture->quantizer_scale;
+   int mismatch;
+   const DCTtab *tab;
+
+   i = -1;
+   mismatch = 1;
+
+   if (!picture->alternate_scan) {
+      scan =  mpeg2_scan_norm_orig;
+      scan_ptable = mpeg2_scan_norm_ptable;
+   } else {
+      scan = mpeg2_scan_alt_orig;
+      scan_ptable = mpeg2_scan_alt_ptable;
+   }
+
+   vl_vlc_needbits(&bs->vlc);
+   if (bs->vlc.buf >= 0x28000000) {
+      tab = DCT_B14DC_5 + (vl_vlc_ubits(&bs->vlc, 5) - 5);
+      goto entry_1;
+   } else
+      goto entry_2;
+
+   while (1) {
+      if (bs->vlc.buf >= 0x28000000) {
+
+         tab = DCT_B14AC_5 + (vl_vlc_ubits(&bs->vlc, 5) - 5);
+
+      entry_1:
+         i += tab->run;
+         if (i >= 64)
+            break;	/* end of block */
+
+      normal_code:
+         l = scan_ptable[j = scan[i]];
+         bs->vlc.buf <<= tab->len;
+         bs->vlc.bits += tab->len + 1;
+         val = ((2*tab->level+1) * quantizer_scale * quant_matrix[l]) >> 5;
+
+         /* if (bitstream_get (1)) val = -val; */
+         val = (val ^ vl_vlc_sbits(&bs->vlc, 1)) - vl_vlc_sbits(&bs->vlc, 1);
+
+         SATURATE (val);
+         dest[j] = val;
+         mismatch ^= val;
+
+         bs->vlc.buf <<= 1;
+         vl_vlc_needbits(&bs->vlc);
+
+         continue;
+
+      }
+
+   entry_2:
+      if (bs->vlc.buf >= 0x04000000) {
+
+         tab = DCT_B14_8 + (vl_vlc_ubits(&bs->vlc, 8) - 4);
+
+         i += tab->run;
+         if (i < 64)
+            goto normal_code;
+
+         /* escape code */
+
+         i += UBITS(bs->vlc.buf << 6, 6) - 64;
+         if (i >= 64)
+            break;	/* illegal, check needed to avoid buffer overflow */
+
+         l = scan_ptable[j = scan[i]];
+
+         vl_vlc_dumpbits(&bs->vlc, 12);
+         vl_vlc_needbits(&bs->vlc);
+         val = 2 * (vl_vlc_sbits(&bs->vlc, 12) + vl_vlc_sbits(&bs->vlc, 1)) + 1;
+         val = (val * quantizer_scale * quant_matrix[l]) / 32;
+
+         SATURATE (val);
+         dest[j] = val;
+         mismatch ^= val;
+
+         vl_vlc_dumpbits(&bs->vlc, 12);
+         vl_vlc_needbits(&bs->vlc);
+
+         continue;
+
+      } else if (bs->vlc.buf >= 0x02000000) {
+         tab = DCT_B14_10 + (vl_vlc_ubits(&bs->vlc, 10) - 8);
+         i += tab->run;
+         if (i < 64)
+            goto normal_code;
+      } else if (bs->vlc.buf >= 0x00800000) {
+         tab = DCT_13 + (vl_vlc_ubits(&bs->vlc, 13) - 16);
+         i += tab->run;
+         if (i < 64)
+            goto normal_code;
+      } else if (bs->vlc.buf >= 0x00200000) {
+         tab = DCT_15 + (vl_vlc_ubits(&bs->vlc, 15) - 16);
+         i += tab->run;
+         if (i < 64)
+            goto normal_code;
+      } else {
+         tab = DCT_16 + vl_vlc_ubits(&bs->vlc, 16);
+         bs->vlc.buf <<= 16;
+         vl_vlc_getword(&bs->vlc, bs->vlc.bits + 16);
+         i += tab->run;
+         if (i < 64)
+            goto normal_code;
+      }
+      break;	/* illegal, check needed to avoid buffer overflow */
+   }
+   dest[63] ^= mismatch & 1;
+   vl_vlc_dumpbits(&bs->vlc, 2);	/* dump end of block code */
+}
+
+static inline void
+get_mpeg1_intra_block(struct vl_mpg12_bs *bs, struct pipe_mpeg12_picture_desc * picture, short *dest)
+{
+   int i, j, l, val;
+   const uint8_t *scan;
+   uint8_t *scan_ptable;
+   uint8_t *quant_matrix = picture->intra_quantizer_matrix;
+   int quantizer_scale = picture->quantizer_scale;
+   const DCTtab * tab;
+
+   i = 0;
+
+   if (!picture->alternate_scan) {
+      scan =  mpeg2_scan_norm_orig;
+      scan_ptable = mpeg2_scan_norm_ptable;
+   } else {
+      scan = mpeg2_scan_alt_orig;
+      scan_ptable = mpeg2_scan_alt_ptable;
+   }
+
+   vl_vlc_needbits(&bs->vlc);
+
+   while (1) {
+      if (bs->vlc.buf >= 0x28000000) {
+
+         tab = DCT_B14AC_5 + (vl_vlc_ubits(&bs->vlc, 5) - 5);
+
+         i += tab->run;
+         if (i >= 64)
+            break;	/* end of block */
+
+      normal_code:
+         l = scan_ptable[j = scan[i]];
+         bs->vlc.buf <<= tab->len;
+         bs->vlc.bits += tab->len + 1;
+         val = (tab->level * quantizer_scale * quant_matrix[l]) >> 4;
+
+         /* oddification */
+         val = (val - 1) | 1;
+
+         /* if (bitstream_get (1)) val = -val; */
+         val = (val ^ vl_vlc_sbits(&bs->vlc, 1)) - vl_vlc_sbits(&bs->vlc, 1);
+
+         SATURATE (val);
+         dest[j] = val;
+
+         bs->vlc.buf <<= 1;
+         vl_vlc_needbits(&bs->vlc);
+
+         continue;
+
+      } else if (bs->vlc.buf >= 0x04000000) {
+
+         tab = DCT_B14_8 + (vl_vlc_ubits(&bs->vlc, 8) - 4);
+
+         i += tab->run;
+         if (i < 64)
+            goto normal_code;
+
+         /* escape code */
+
+         i += UBITS(bs->vlc.buf << 6, 6) - 64;
+         if (i >= 64)
+            break;	/* illegal, check needed to avoid buffer overflow */
+
+         l = scan_ptable[j = scan[i]];
+
+         vl_vlc_dumpbits(&bs->vlc, 12);
+         vl_vlc_needbits(&bs->vlc);
+         val = vl_vlc_sbits(&bs->vlc, 8);
+         if (! (val & 0x7f)) {
+            vl_vlc_dumpbits(&bs->vlc, 8);
+            val = vl_vlc_ubits(&bs->vlc, 8) + 2 * val;
+         }
+         val = (val * quantizer_scale * quant_matrix[l]) / 16;
+
+         /* oddification */
+         val = (val + ~SBITS (val, 1)) | 1;
+
+         SATURATE (val);
+         dest[j] = val;
+
+         vl_vlc_dumpbits(&bs->vlc, 8);
+         vl_vlc_needbits(&bs->vlc);
+
+         continue;
+
+      } else if (bs->vlc.buf >= 0x02000000) {
+         tab = DCT_B14_10 + (vl_vlc_ubits(&bs->vlc, 10) - 8);
+         i += tab->run;
+         if (i < 64)
+            goto normal_code;
+      } else if (bs->vlc.buf >= 0x00800000) {
+         tab = DCT_13 + (vl_vlc_ubits(&bs->vlc, 13) - 16);
+         i += tab->run;
+         if (i < 64)
+            goto normal_code;
+      } else if (bs->vlc.buf >= 0x00200000) {
+         tab = DCT_15 + (vl_vlc_ubits(&bs->vlc, 15) - 16);
+         i += tab->run;
+         if (i < 64)
+            goto normal_code;
+      } else {
+         tab = DCT_16 + vl_vlc_ubits(&bs->vlc, 16);
+         bs->vlc.buf <<= 16;
+         vl_vlc_getword(&bs->vlc, bs->vlc.bits + 16);
+         i += tab->run;
+         if (i < 64)
+            goto normal_code;
+      }
+      break;	/* illegal, check needed to avoid buffer overflow */
+   }
+   vl_vlc_dumpbits(&bs->vlc, 2);	/* dump end of block code */
+}
+
+static inline void
+get_mpeg1_non_intra_block(struct vl_mpg12_bs *bs, struct pipe_mpeg12_picture_desc * picture, short *dest)
+{
+   int i, j, l, val;
+   const uint8_t * scan;
+   uint8_t *scan_ptable;
+   uint8_t *quant_matrix = picture->non_intra_quantizer_matrix;
+   int quantizer_scale = picture->quantizer_scale;
+   const DCTtab * tab;
+
+   i = -1;
+
+   if (!picture->alternate_scan) {
+      scan =  mpeg2_scan_norm_orig;
+      scan_ptable = mpeg2_scan_norm_ptable;
+   } else {
+      scan = mpeg2_scan_alt_orig;
+      scan_ptable = mpeg2_scan_alt_ptable;
+   }
+
+   vl_vlc_needbits(&bs->vlc);
+   if (bs->vlc.buf >= 0x28000000) {
+      tab = DCT_B14DC_5 + (vl_vlc_ubits(&bs->vlc, 5) - 5);
+      goto entry_1;
+   } else
+      goto entry_2;
+
+   while (1) {
+      if (bs->vlc.buf >= 0x28000000) {
+
+         tab = DCT_B14AC_5 + (vl_vlc_ubits(&bs->vlc, 5) - 5);
+
+      entry_1:
+         i += tab->run;
+         if (i >= 64)
+            break;	/* end of block */
+
+      normal_code:
+         l = scan_ptable[j = scan[i]];
+         bs->vlc.buf <<= tab->len;
+         bs->vlc.bits += tab->len + 1;
+         val = ((2*tab->level+1) * quantizer_scale * quant_matrix[l]) >> 5;
+
+         /* oddification */
+         val = (val - 1) | 1;
+
+         /* if (bitstream_get (1)) val = -val; */
+         val = (val ^ vl_vlc_sbits(&bs->vlc, 1)) - vl_vlc_sbits(&bs->vlc, 1);
+
+         SATURATE (val);
+         dest[j] = val;
+
+         bs->vlc.buf <<= 1;
+         vl_vlc_needbits(&bs->vlc);
+
+         continue;
+
+      }
+
+   entry_2:
+      if (bs->vlc.buf >= 0x04000000) {
+
+         tab = DCT_B14_8 + (vl_vlc_ubits(&bs->vlc, 8) - 4);
+
+         i += tab->run;
+         if (i < 64)
+            goto normal_code;
+
+         /* escape code */
+
+         i += UBITS(bs->vlc.buf << 6, 6) - 64;
+         if (i >= 64)
+            break;	/* illegal, check needed to avoid buffer overflow */
+
+         l = scan_ptable[j = scan[i]];
+
+         vl_vlc_dumpbits(&bs->vlc, 12);
+         vl_vlc_needbits(&bs->vlc);
+         val = vl_vlc_sbits(&bs->vlc, 8);
+         if (! (val & 0x7f)) {
+            vl_vlc_dumpbits(&bs->vlc, 8);
+            val = vl_vlc_ubits(&bs->vlc, 8) + 2 * val;
+         }
+         val = 2 * (val + SBITS (val, 1)) + 1;
+         val = (val * quantizer_scale * quant_matrix[l]) / 32;
+
+         /* oddification */
+         val = (val + ~SBITS (val, 1)) | 1;
+
+         SATURATE (val);
+         dest[j] = val;
+
+         vl_vlc_dumpbits(&bs->vlc, 8);
+         vl_vlc_needbits(&bs->vlc);
+
+         continue;
+
+      } else if (bs->vlc.buf >= 0x02000000) {
+         tab = DCT_B14_10 + (vl_vlc_ubits(&bs->vlc, 10) - 8);
+         i += tab->run;
+         if (i < 64)
+            goto normal_code;
+      } else if (bs->vlc.buf >= 0x00800000) {
+         tab = DCT_13 + (vl_vlc_ubits(&bs->vlc, 13) - 16);
+         i += tab->run;
+         if (i < 64)
+            goto normal_code;
+      } else if (bs->vlc.buf >= 0x00200000) {
+         tab = DCT_15 + (vl_vlc_ubits(&bs->vlc, 15) - 16);
+         i += tab->run;
+         if (i < 64)
+            goto normal_code;
+      } else {
+         tab = DCT_16 + vl_vlc_ubits(&bs->vlc, 16);
+         bs->vlc.buf <<= 16;
+         vl_vlc_getword(&bs->vlc, bs->vlc.bits + 16);
+         i += tab->run;
+         if (i < 64)
+            goto normal_code;
+      }
+      break;	/* illegal, check needed to avoid buffer overflow */
+   }
+   vl_vlc_dumpbits(&bs->vlc, 2);	/* dump end of block code */
+}
+
+static inline void
+slice_intra_DCT(struct vl_mpg12_bs *bs, struct pipe_mpeg12_picture_desc * picture, int cc,
+                unsigned x, unsigned y, enum pipe_mpeg12_dct_type coding)
+{
+   short *dest = bs->ycbcr_buffer[cc];
+
+   bs->ycbcr_stream[cc]->x = x;
+   bs->ycbcr_stream[cc]->y = y;
+   bs->ycbcr_stream[cc]->intra = PIPE_MPEG12_DCT_INTRA;
+   bs->ycbcr_stream[cc]->coding = coding;
+
+   vl_vlc_needbits(&bs->vlc);
+
+   /* Get the intra DC coefficient and inverse quantize it */
+   if (cc == 0)
+      picture->dc_dct_pred[0] += get_luma_dc_dct_diff(bs);
+   else
+      picture->dc_dct_pred[cc] += get_chroma_dc_dct_diff(bs);
+
+   memset(dest, 0, sizeof(int16_t) * 64);
+   dest[0] = picture->dc_dct_pred[cc] << (3 - picture->intra_dc_precision);
+   if (picture->mpeg1) {
+      if (picture->picture_coding_type != D_TYPE)
+          get_mpeg1_intra_block(bs, picture, dest);
+   } else if (picture->intra_vlc_format)
+      get_intra_block_B15(bs, picture, dest);
+   else
+      get_intra_block_B14(bs, picture, dest);
+
+   bs->num_ycbcr_blocks[cc]++;
+   bs->ycbcr_stream[cc]++;
+   bs->ycbcr_buffer[cc] += 64;
+}
+
+static inline void
+slice_non_intra_DCT(struct vl_mpg12_bs *bs, struct pipe_mpeg12_picture_desc * picture, int cc,
+                    unsigned x, unsigned y, enum pipe_mpeg12_dct_type coding)
+{
+   short *dest = bs->ycbcr_buffer[cc];
+
+   bs->ycbcr_stream[cc]->x = x;
+   bs->ycbcr_stream[cc]->y = y;
+   bs->ycbcr_stream[cc]->intra = PIPE_MPEG12_DCT_DELTA;
+   bs->ycbcr_stream[cc]->coding = coding;
+
+   memset(dest, 0, sizeof(int16_t) * 64);
+   if (picture->mpeg1)
+      get_mpeg1_non_intra_block(bs, picture, dest);
+   else
+      get_non_intra_block(bs, picture, dest);
+
+   bs->num_ycbcr_blocks[cc]++;
+   bs->ycbcr_stream[cc]++;
+   bs->ycbcr_buffer[cc] += 64;
+}
+
+static inline void
+motion_mp1(struct vl_mpg12_bs *bs, unsigned f_code[2], struct pipe_motionvector *mv)
+{
+   int motion_x, motion_y;
+
+   mv->top.field_select = mv->bottom.field_select = PIPE_VIDEO_FRAME;
+
+   vl_vlc_needbits(&bs->vlc);
+   motion_x = (mv->top.x + (get_motion_delta(bs, f_code[0]) << f_code[1]));
+   motion_x = bound_motion_vector (motion_x, f_code[0] + f_code[1]);
+   mv->top.x = mv->bottom.x = motion_x;
+
+   vl_vlc_needbits(&bs->vlc);
+   motion_y = (mv->top.y + (get_motion_delta(bs, f_code[0]) << f_code[1]));
+   motion_y = bound_motion_vector (motion_y, f_code[0] + f_code[1]);
+   mv->top.y = mv->bottom.y = motion_y;
+}
+
+static inline void
+motion_fr_frame(struct vl_mpg12_bs *bs, unsigned f_code[2], struct pipe_motionvector *mv)
+{
+   int motion_x, motion_y;
+
+   mv->top.field_select = mv->bottom.field_select = PIPE_VIDEO_FRAME;
+
+   vl_vlc_needbits(&bs->vlc);
+   motion_x = mv->top.x + get_motion_delta(bs, f_code[0]);
+   motion_x = bound_motion_vector(motion_x, f_code[0]);
+   mv->top.x = mv->bottom.x = motion_x;
+
+   vl_vlc_needbits(&bs->vlc);
+   motion_y = mv->top.y + get_motion_delta(bs, f_code[1]);
+   motion_y = bound_motion_vector(motion_y, f_code[1]);
+   mv->top.y = mv->bottom.y = motion_y;
+}
+
+static inline void
+motion_fr_field(struct vl_mpg12_bs *bs, unsigned f_code[2], struct pipe_motionvector *mv)
+{
+   int motion_x, motion_y;
+
+   vl_vlc_needbits(&bs->vlc);
+   mv->top.field_select = vl_vlc_ubits(&bs->vlc, 1) ?
+      PIPE_VIDEO_BOTTOM_FIELD : PIPE_VIDEO_TOP_FIELD;
+   vl_vlc_dumpbits(&bs->vlc, 1);
+
+   motion_x = mv->top.x + get_motion_delta(bs, f_code[0]);
+   motion_x = bound_motion_vector (motion_x, f_code[0]);
+   mv->top.x = motion_x;
+
+   vl_vlc_needbits(&bs->vlc);
+   motion_y = (mv->top.y >> 1) + get_motion_delta(bs, f_code[1]);
+   /* motion_y = bound_motion_vector (motion_y, f_code[1]); */
+   mv->top.y = motion_y << 1;
+
+   vl_vlc_needbits(&bs->vlc);
+   mv->bottom.field_select = vl_vlc_ubits(&bs->vlc, 1) ?
+      PIPE_VIDEO_BOTTOM_FIELD : PIPE_VIDEO_TOP_FIELD;
+   vl_vlc_dumpbits(&bs->vlc, 1);
+
+   motion_x = mv->bottom.x + get_motion_delta(bs, f_code[0]);
+   motion_x = bound_motion_vector (motion_x, f_code[0]);
+   mv->bottom.x = motion_x;
+
+   vl_vlc_needbits(&bs->vlc);
+   motion_y = (mv->bottom.y >> 1) + get_motion_delta(bs, f_code[1]);
+   /* motion_y = bound_motion_vector (motion_y, f_code[1]); */
+   mv->bottom.y = motion_y << 1;
+}
+
+static inline void
+motion_fr_dmv(struct vl_mpg12_bs *bs, unsigned f_code[2], struct pipe_motionvector *mv)
+{
+   int motion_x, motion_y;
+
+   // TODO Implement dmv
+   mv->top.field_select = mv->bottom.field_select = PIPE_VIDEO_FRAME;
+
+   vl_vlc_needbits(&bs->vlc);
+   motion_x = mv->top.x + get_motion_delta(bs, f_code[0]);
+   motion_x = bound_motion_vector(motion_x, f_code[0]);
+   mv->top.x = mv->bottom.x = motion_x;
+
+   vl_vlc_needbits(&bs->vlc);
+   motion_y = (mv->top.y >> 1) + get_motion_delta(bs, f_code[1]);
+   /* motion_y = bound_motion_vector (motion_y, f_code[1]); */
+   mv->top.y = mv->bottom.y = motion_y << 1;
+}
+
+/* like motion_frame, but parsing without actual motion compensation */
+static inline void
+motion_fr_conceal(struct vl_mpg12_bs *bs, unsigned f_code[2], struct pipe_motionvector *mv)
+{
+   int tmp;
+
+   mv->top.field_select = mv->bottom.field_select = PIPE_VIDEO_FRAME;
+
+   vl_vlc_needbits(&bs->vlc);
+   tmp = (mv->top.x + get_motion_delta(bs, f_code[0]));
+   tmp = bound_motion_vector (tmp, f_code[0]);
+   mv->top.x = mv->bottom.x = tmp;
+
+   vl_vlc_needbits(&bs->vlc);
+   tmp = (mv->top.y + get_motion_delta(bs, f_code[1]));
+   tmp = bound_motion_vector (tmp, f_code[1]);
+   mv->top.y = mv->bottom.y = tmp;
+
+   vl_vlc_dumpbits(&bs->vlc, 1); /* remove marker_bit */
+}
+
+static inline void
+motion_fi_field(struct vl_mpg12_bs *bs, unsigned f_code[2], struct pipe_motionvector *mv)
+{
+   int motion_x, motion_y;
+
+   vl_vlc_needbits(&bs->vlc);
+
+   // ref_field
+   //vl_vlc_ubits(&bs->vlc, 1);
+
+   // TODO field select may need to do something here for bob (weave ok)
+   mv->top.field_select = mv->bottom.field_select = PIPE_VIDEO_FRAME;
+   vl_vlc_dumpbits(&bs->vlc, 1);
+
+   motion_x = mv->top.x + get_motion_delta(bs, f_code[0]);
+   motion_x = bound_motion_vector (motion_x, f_code[0]);
+   mv->top.x = mv->bottom.x = motion_x;
+
+   vl_vlc_needbits(&bs->vlc);
+   motion_y = mv->top.y + get_motion_delta(bs, f_code[1]);
+   motion_y = bound_motion_vector (motion_y, f_code[1]);
+   mv->top.y = mv->bottom.y = motion_y;
+}
+
+static inline void
+motion_fi_16x8(struct vl_mpg12_bs *bs, unsigned f_code[2], struct pipe_motionvector *mv)
+{
+   int motion_x, motion_y;
+
+   vl_vlc_needbits(&bs->vlc);
+
+   // ref_field
+   //vl_vlc_ubits(&bs->vlc, 1);
+
+   // TODO field select may need to do something here bob  (weave ok)
+   mv->top.field_select = PIPE_VIDEO_FRAME;
+   vl_vlc_dumpbits(&bs->vlc, 1);
+
+   motion_x = mv->top.x + get_motion_delta(bs, f_code[0]);
+   motion_x = bound_motion_vector (motion_x, f_code[0]);
+   mv->top.x = motion_x;
+
+   vl_vlc_needbits(&bs->vlc);
+   motion_y = mv->top.y + get_motion_delta(bs, f_code[1]);
+   motion_y = bound_motion_vector (motion_y, f_code[1]);
+   mv->top.y = motion_y;
+
+   vl_vlc_needbits(&bs->vlc);
+   // ref_field
+   //vl_vlc_ubits(&bs->vlc, 1);
+
+   // TODO field select may need to do something here for bob (weave ok)
+   mv->bottom.field_select = PIPE_VIDEO_FRAME;
+   vl_vlc_dumpbits(&bs->vlc, 1);
+
+   motion_x = mv->bottom.x + get_motion_delta(bs, f_code[0]);
+   motion_x = bound_motion_vector (motion_x, f_code[0]);
+   mv->bottom.x = motion_x;
+
+   vl_vlc_needbits(&bs->vlc);
+   motion_y = mv->bottom.y + get_motion_delta(bs, f_code[1]);
+   motion_y = bound_motion_vector (motion_y, f_code[1]);
+   mv->bottom.y = motion_y;
+}
+
+static inline void
+motion_fi_dmv(struct vl_mpg12_bs *bs, unsigned f_code[2], struct pipe_motionvector *mv)
+{
+   int motion_x, motion_y;
+
+   // TODO field select may need to do something here for bob  (weave ok)
+   mv->top.field_select = mv->bottom.field_select = PIPE_VIDEO_FRAME;
+
+   vl_vlc_needbits(&bs->vlc);
+   motion_x = mv->top.x + get_motion_delta(bs, f_code[0]);
+   motion_x = bound_motion_vector (motion_x, f_code[0]);
+   mv->top.x = mv->bottom.x = motion_x;
+
+   vl_vlc_needbits(&bs->vlc);
+   motion_y = mv->top.y + get_motion_delta(bs, f_code[1]);
+   motion_y = bound_motion_vector (motion_y, f_code[1]);
+   mv->top.y = mv->bottom.y = motion_y;
+}
+
+
+static inline void
+motion_fi_conceal(struct vl_mpg12_bs *bs, unsigned f_code[2], struct pipe_motionvector *mv)
+{
+   int tmp;
+
+   vl_vlc_needbits(&bs->vlc);
+   vl_vlc_dumpbits(&bs->vlc, 1); /* remove field_select */
+
+   tmp = (mv->top.x + get_motion_delta(bs, f_code[0]));
+   tmp = bound_motion_vector(tmp, f_code[0]);
+   mv->top.x = mv->bottom.x = tmp;
+
+   vl_vlc_needbits(&bs->vlc);
+   tmp = (mv->top.y + get_motion_delta(bs, f_code[1]));
+   tmp = bound_motion_vector(tmp, f_code[1]);
+   mv->top.y = mv->bottom.y = tmp;
+
+   vl_vlc_dumpbits(&bs->vlc, 1); /* remove marker_bit */
+}
+
+#define MOTION_CALL(routine, macroblock_modes)		\
+do {							\
+   if ((macroblock_modes) & MACROBLOCK_MOTION_FORWARD)  \
+      routine(bs, picture->f_code[0], &mv_fwd);         \
+   if ((macroblock_modes) & MACROBLOCK_MOTION_BACKWARD)	\
+      routine(bs, picture->f_code[1], &mv_bwd);         \
+} while (0)
+
+#define NEXT_MACROBLOCK		                \
+do {				                \
+   bs->mv_stream[0][x+y*bs->width/16] = mv_fwd; \
+   bs->mv_stream[1][x+y*bs->width/16] = mv_bwd; \
+   ++x;				                \
+   if (x == bs->width/16) {	                \
+      ++y;                                      \
+      if (y >= bs->height/16)                   \
+         return false;                          \
+      x = 0;                                    \
+   }                                            \
+} while (0)
+
+static inline bool
+slice_init(struct vl_mpg12_bs *bs, struct pipe_mpeg12_picture_desc * picture, int *x, int *y)
+{
+   const MBAtab * mba;
+
+   vl_vlc_need32bits(&bs->vlc);
+   while(bs->vlc.buf < 0x101 || bs->vlc.buf > 0x1AF) {
+      if(!vl_vlc_getbyte(&bs->vlc))
+         return false;
+   }
+   *y = ((bs->vlc.buf & 0xFF) - 1) * 16;
+   vl_vlc_restart(&bs->vlc);
+
+   //TODO conversion to signed format signed format
+   picture->dc_dct_pred[0] = picture->dc_dct_pred[1] = picture->dc_dct_pred[2] = 0;
+
+   picture->quantizer_scale = get_quantizer_scale(bs, picture);
+
+   /* ignore intra_slice and all the extra data */
+   while (bs->vlc.buf & 0x80000000) {
+      vl_vlc_dumpbits(&bs->vlc, 9);
+      vl_vlc_needbits(&bs->vlc);
+   }
+
+   /* decode initial macroblock address increment */
+   *x = 0;
+   while (1) {
+      if (bs->vlc.buf >= 0x08000000) {
+          mba = MBA_5 + (vl_vlc_ubits(&bs->vlc, 6) - 2);
+          break;
+      } else if (bs->vlc.buf >= 0x01800000) {
+          mba = MBA_11 + (vl_vlc_ubits(&bs->vlc, 12) - 24);
+          break;
+      } else switch (vl_vlc_ubits(&bs->vlc, 12)) {
+      case 8:		/* macroblock_escape */
+          *x += 33;
+          vl_vlc_dumpbits(&bs->vlc, 11);
+          vl_vlc_needbits(&bs->vlc);
+          continue;
+      case 15:	/* macroblock_stuffing (MPEG1 only) */
+          bs->vlc.buf &= 0xfffff;
+          vl_vlc_dumpbits(&bs->vlc, 11);
+          vl_vlc_needbits(&bs->vlc);
+          continue;
+      default:	/* error */
+          return false;
+      }
+   }
+   vl_vlc_dumpbits(&bs->vlc, mba->len + 1);
+   *x = (*x + mba->mba) << 4;
+
+   while (*x >= bs->width) {
+      *x -= bs->width;
+      *y += 16;
+   }
+   if (*y > bs->height)
+      return false;
+
+   return true;
+}
+
+static inline bool
+decode_slice(struct vl_mpg12_bs *bs, struct pipe_mpeg12_picture_desc *picture)
+{
+   struct pipe_motionvector mv_fwd, mv_bwd;
+   enum pipe_mpeg12_dct_type dct_type;
+   int x, y;
+
+   if (!slice_init(bs, picture, &x, &y))
+      return false;
+
+   mv_fwd.top.x = mv_fwd.top.y = mv_fwd.bottom.x = mv_fwd.bottom.y = 0;
+   mv_fwd.top.field_select = mv_fwd.bottom.field_select = PIPE_VIDEO_FRAME;
+
+   mv_bwd.top.x = mv_bwd.top.y = mv_bwd.bottom.x = mv_bwd.bottom.y = 0;
+   mv_bwd.top.field_select = mv_bwd.bottom.field_select = PIPE_VIDEO_FRAME;
+
+   x /= 16;
+   y /= 16;
+
+   while (1) {
+      int macroblock_modes;
+      int mba_inc;
+      const MBAtab * mba;
+
+      vl_vlc_needbits(&bs->vlc);
+
+      macroblock_modes = get_macroblock_modes(bs, picture); //macroblock_modes()
+      dct_type = macroblock_modes & DCT_TYPE_INTERLACED ?
+         PIPE_MPEG12_DCT_TYPE_FIELD : PIPE_MPEG12_DCT_TYPE_FRAME;
+
+      switch(macroblock_modes & (MACROBLOCK_MOTION_FORWARD|MACROBLOCK_MOTION_BACKWARD)) {
+      case (MACROBLOCK_MOTION_FORWARD|MACROBLOCK_MOTION_BACKWARD):
+         mv_fwd.top.weight = mv_fwd.bottom.weight = PIPE_VIDEO_MV_WEIGHT_HALF;
+         mv_bwd.top.weight = mv_bwd.bottom.weight = PIPE_VIDEO_MV_WEIGHT_HALF;
+         break;
+
+      default:
+      case MACROBLOCK_MOTION_FORWARD:
+         mv_fwd.top.weight = mv_fwd.bottom.weight = PIPE_VIDEO_MV_WEIGHT_MAX;
+         mv_bwd.top.weight = mv_bwd.bottom.weight = PIPE_VIDEO_MV_WEIGHT_MIN;
+         break;
+
+      case MACROBLOCK_MOTION_BACKWARD:
+         mv_fwd.top.weight = mv_fwd.bottom.weight = PIPE_VIDEO_MV_WEIGHT_MIN;
+         mv_bwd.top.weight = mv_bwd.bottom.weight = PIPE_VIDEO_MV_WEIGHT_MAX;
+         break;
+      }
+
+      /* maybe integrate MACROBLOCK_QUANT test into get_macroblock_modes ? */
+      if (macroblock_modes & MACROBLOCK_QUANT)
+         picture->quantizer_scale = get_quantizer_scale(bs, picture);
+
+      if (macroblock_modes & MACROBLOCK_INTRA) {
+
+         if (picture->concealment_motion_vectors) {
+            if (picture->picture_structure == FRAME_PICTURE)
+               motion_fr_conceal(bs, picture->f_code[0], &mv_fwd);
+            else
+               motion_fi_conceal(bs, picture->f_code[0], &mv_fwd);
+
+         } else {
+            mv_fwd.top.x = mv_fwd.top.y = mv_fwd.bottom.x = mv_fwd.bottom.y = 0;
+            mv_bwd.top.x = mv_bwd.top.y = mv_bwd.bottom.x = mv_bwd.bottom.y = 0;
+         }
+         mv_fwd.top.weight = mv_fwd.bottom.weight = PIPE_VIDEO_MV_WEIGHT_MIN;
+         mv_bwd.top.weight = mv_bwd.bottom.weight = PIPE_VIDEO_MV_WEIGHT_MIN;
+
+         // unravaled loop of 6 block(i) calls in macroblock()
+         slice_intra_DCT(bs, picture, 0, x*2+0, y*2+0, dct_type);
+         slice_intra_DCT(bs, picture, 0, x*2+1, y*2+0, dct_type);
+         slice_intra_DCT(bs, picture, 0, x*2+0, y*2+1, dct_type);
+         slice_intra_DCT(bs, picture, 0, x*2+1, y*2+1, dct_type);
+         slice_intra_DCT(bs, picture, 1, x, y, dct_type);
+         slice_intra_DCT(bs, picture, 2, x, y, dct_type);
+
+         if (picture->picture_coding_type == D_TYPE) {
+            vl_vlc_needbits(&bs->vlc);
+            vl_vlc_dumpbits(&bs->vlc, 1);
+         }
+
+      } else {
+         if (picture->picture_structure == FRAME_PICTURE)
+            switch (macroblock_modes & MOTION_TYPE_MASK) {
+            case MC_FRAME:
+               if (picture->mpeg1) {
+                  MOTION_CALL(motion_mp1, macroblock_modes);
+               } else {
+                  MOTION_CALL(motion_fr_frame, macroblock_modes);
+               }
+               break;
+
+            case MC_FIELD:
+               MOTION_CALL (motion_fr_field, macroblock_modes);
+               break;
+
+            case MC_DMV:
+               MOTION_CALL (motion_fr_dmv, MACROBLOCK_MOTION_FORWARD);
+               break;
+
+            case 0:
+               /* non-intra mb without forward mv in a P picture */
+               mv_fwd.top.x = mv_fwd.top.y = mv_fwd.bottom.x = mv_fwd.bottom.y = 0;
+               mv_bwd.top.x = mv_bwd.top.y = mv_bwd.bottom.x = mv_bwd.bottom.y = 0;
+               break;
+            }
+         else
+            switch (macroblock_modes & MOTION_TYPE_MASK) {
+            case MC_FIELD:
+               MOTION_CALL (motion_fi_field, macroblock_modes);
+               break;
+
+            case MC_16X8:
+               MOTION_CALL (motion_fi_16x8, macroblock_modes);
+               break;
+
+            case MC_DMV:
+               MOTION_CALL (motion_fi_dmv, MACROBLOCK_MOTION_FORWARD);
+               break;
+
+            case 0:
+               /* non-intra mb without forward mv in a P picture */
+               mv_fwd.top.x = mv_fwd.top.y = mv_fwd.bottom.x = mv_fwd.bottom.y = 0;
+               mv_bwd.top.x = mv_bwd.top.y = mv_bwd.bottom.x = mv_bwd.bottom.y = 0;
+               break;
+            }
+
+         if (macroblock_modes & MACROBLOCK_PATTERN) {
+            int coded_block_pattern = get_coded_block_pattern(bs);
+
+            // TODO  optimize not fully used for idct accel only mc.
+            if (coded_block_pattern & 0x20)
+               slice_non_intra_DCT(bs, picture, 0, x*2+0, y*2+0, dct_type); // cc0  luma 0
+            if (coded_block_pattern & 0x10)
+               slice_non_intra_DCT(bs, picture, 0, x*2+1, y*2+0, dct_type); // cc0 luma 1
+            if (coded_block_pattern & 0x08)
+               slice_non_intra_DCT(bs, picture, 0, x*2+0, y*2+1, dct_type); // cc0 luma 2
+            if (coded_block_pattern & 0x04)
+               slice_non_intra_DCT(bs, picture, 0, x*2+1, y*2+1, dct_type); // cc0 luma 3
+            if (coded_block_pattern & 0x2)
+               slice_non_intra_DCT(bs, picture, 1, x, y, dct_type); // cc1 croma
+            if (coded_block_pattern & 0x1)
+               slice_non_intra_DCT(bs, picture, 2, x, y, dct_type); // cc2 croma
+         }
+
+         picture->dc_dct_pred[0] = picture->dc_dct_pred[1] = picture->dc_dct_pred[2] = 0;
+      }
+
+      NEXT_MACROBLOCK;
+
+      vl_vlc_needbits(&bs->vlc);
+      mba_inc = 0;
+      while (1) {
+         if (bs->vlc.buf >= 0x10000000) {
+            mba = MBA_5 + (vl_vlc_ubits(&bs->vlc, 5) - 2);
+            break;
+         } else if (bs->vlc.buf >= 0x03000000) {
+            mba = MBA_11 + (vl_vlc_ubits(&bs->vlc, 11) - 24);
+            break;
+         } else switch (vl_vlc_ubits(&bs->vlc, 11)) {
+         case 8:		/* macroblock_escape */
+            mba_inc += 33;
+            /* pass through */
+         case 15:	/* macroblock_stuffing (MPEG1 only) */
+            vl_vlc_dumpbits(&bs->vlc, 11);
+            vl_vlc_needbits(&bs->vlc);
+            continue;
+         default:	/* end of slice, or error */
+            return true;
+         }
+      }
+      vl_vlc_dumpbits(&bs->vlc, mba->len);
+      mba_inc += mba->mba;
+      if (mba_inc) {
+         //TODO  conversion to signed format signed format
+         picture->dc_dct_pred[0] = picture->dc_dct_pred[1] = picture->dc_dct_pred[2] = 0;
+
+         switch(picture->picture_structure) {
+         case FRAME_PICTURE:
+            mv_fwd.top.field_select = mv_fwd.bottom.field_select = PIPE_VIDEO_FRAME;
+            mv_bwd.top.field_select = mv_bwd.bottom.field_select = PIPE_VIDEO_FRAME;
+            break;
+
+         case TOP_FIELD:
+            mv_fwd.top.field_select = mv_fwd.bottom.field_select = PIPE_VIDEO_TOP_FIELD;
+            mv_bwd.top.field_select = mv_bwd.bottom.field_select = PIPE_VIDEO_TOP_FIELD;
+            break;
+
+         case BOTTOM_FIELD:
+            mv_fwd.top.field_select = mv_fwd.bottom.field_select = PIPE_VIDEO_BOTTOM_FIELD;
+            mv_bwd.top.field_select = mv_bwd.bottom.field_select = PIPE_VIDEO_BOTTOM_FIELD;
+            break;
+         }
+
+         if (picture->picture_coding_type == P_TYPE) {
+            mv_fwd.top.x = mv_fwd.top.y = mv_fwd.bottom.x = mv_fwd.bottom.y = 0;
+            mv_fwd.top.weight = mv_fwd.bottom.weight = PIPE_VIDEO_MV_WEIGHT_MAX;
+         }
+         do {
+            NEXT_MACROBLOCK;
+         } while (--mba_inc);
+      }
+   }
+}
+
+void
+vl_mpg12_bs_init(struct vl_mpg12_bs *bs, unsigned width, unsigned height)
+{
+   assert(bs);
+
+   memset(bs, 0, sizeof(struct vl_mpg12_bs));
+
+   bs->width = width;
+   bs->height = height;
+
+   setup_scan_ptable();
+}
+
+void
+vl_mpg12_bs_set_buffers(struct vl_mpg12_bs *bs, struct pipe_ycbcr_block *ycbcr_stream[VL_MAX_PLANES],
+                        short *ycbcr_buffer[VL_MAX_PLANES], struct pipe_motionvector *mv_stream[VL_MAX_REF_FRAMES])
+{
+   unsigned i;
+
+   assert(bs);
+   assert(ycbcr_stream && ycbcr_buffer);
+   assert(mv_stream);
+
+   for (i = 0; i < VL_MAX_PLANES; ++i) {
+      bs->ycbcr_stream[i] = ycbcr_stream[i];
+      bs->ycbcr_buffer[i] = ycbcr_buffer[i];
+   }
+   for (i = 0; i < VL_MAX_REF_FRAMES; ++i)
+      bs->mv_stream[i] = mv_stream[i];
+
+   // TODO
+   for (i = 0; i < bs->width/16*bs->height/16; ++i) {
+      bs->mv_stream[0][i].top.x = bs->mv_stream[0][i].top.y = 0;
+      bs->mv_stream[0][i].top.field_select = PIPE_VIDEO_FRAME;
+      bs->mv_stream[0][i].top.weight = PIPE_VIDEO_MV_WEIGHT_MAX;
+      bs->mv_stream[0][i].bottom.x = bs->mv_stream[0][i].bottom.y = 0;
+      bs->mv_stream[0][i].bottom.field_select = PIPE_VIDEO_FRAME;
+      bs->mv_stream[0][i].bottom.weight = PIPE_VIDEO_MV_WEIGHT_MAX;
+
+      bs->mv_stream[1][i].top.x = bs->mv_stream[1][i].top.y = 0;
+      bs->mv_stream[1][i].top.field_select = PIPE_VIDEO_FRAME;
+      bs->mv_stream[1][i].top.weight = PIPE_VIDEO_MV_WEIGHT_MIN;
+      bs->mv_stream[1][i].bottom.x = bs->mv_stream[1][i].bottom.y = 0;
+      bs->mv_stream[1][i].bottom.field_select = PIPE_VIDEO_FRAME;
+      bs->mv_stream[1][i].bottom.weight = PIPE_VIDEO_MV_WEIGHT_MIN;
+   }
+}
+
+void
+vl_mpg12_bs_decode(struct vl_mpg12_bs *bs, unsigned num_bytes, const void *buffer,
+                   struct pipe_mpeg12_picture_desc *picture, unsigned num_ycbcr_blocks[3])
+{
+   assert(bs);
+   assert(num_ycbcr_blocks);
+   assert(buffer && num_bytes);
+
+   bs->num_ycbcr_blocks = num_ycbcr_blocks;
+
+   vl_vlc_init(&bs->vlc, buffer, num_bytes);
+
+   while(decode_slice(bs, picture));
+}
diff --git a/src/gallium/auxiliary/vl/vl_mpeg12_bitstream.h b/src/gallium/auxiliary/vl/vl_mpeg12_bitstream.h
new file mode 100644
index 00000000000..4e48a9faa2f
--- /dev/null
+++ b/src/gallium/auxiliary/vl/vl_mpeg12_bitstream.h
@@ -0,0 +1,59 @@
+/**************************************************************************
+ *
+ * Copyright 2011 Christian König.
+ * All Rights Reserved.
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the
+ * "Software"), to deal in the Software without restriction, including
+ * without limitation the rights to use, copy, modify, merge, publish,
+ * distribute, sub license, and/or sell copies of the Software, and to
+ * permit persons to whom the Software is furnished to do so, subject to
+ * the following conditions:
+ *
+ * The above copyright notice and this permission notice (including the
+ * next paragraph) shall be included in all copies or substantial portions
+ * of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
+ * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT.
+ * IN NO EVENT SHALL TUNGSTEN GRAPHICS AND/OR ITS SUPPLIERS BE LIABLE FOR
+ * ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
+ * TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
+ * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+ *
+ **************************************************************************/
+
+#ifndef vl_mpeg12_bitstream_h
+#define vl_mpeg12_bitstream_h
+
+#include "vl_defines.h"
+#include "vl_vlc.h"
+
+struct vl_mpg12_bs
+{
+   unsigned width, height;
+
+   struct vl_vlc vlc;
+
+   unsigned *num_ycbcr_blocks;
+
+   struct pipe_ycbcr_block *ycbcr_stream[VL_MAX_PLANES];
+   short *ycbcr_buffer[VL_MAX_PLANES];
+
+   struct pipe_motionvector *mv_stream[VL_MAX_REF_FRAMES];
+};
+
+void
+vl_mpg12_bs_init(struct vl_mpg12_bs *bs, unsigned width, unsigned height);
+
+void
+vl_mpg12_bs_set_buffers(struct vl_mpg12_bs *bs, struct pipe_ycbcr_block *ycbcr_stream[VL_MAX_PLANES],
+                        short *ycbcr_buffer[VL_MAX_PLANES], struct pipe_motionvector *mv_stream[VL_MAX_REF_FRAMES]);
+
+void
+vl_mpg12_bs_decode(struct vl_mpg12_bs *bs, unsigned num_bytes, const void *buffer,
+                   struct pipe_mpeg12_picture_desc *picture, unsigned num_ycbcr_blocks[3]);
+
+#endif /* vl_mpeg12_bitstream_h */
diff --git a/src/gallium/auxiliary/vl/vl_mpeg12_decoder.c b/src/gallium/auxiliary/vl/vl_mpeg12_decoder.c
index 74ec4b1db7b..b78844b9cfd 100644
--- a/src/gallium/auxiliary/vl/vl_mpeg12_decoder.c
+++ b/src/gallium/auxiliary/vl/vl_mpeg12_decoder.c
@@ -346,6 +346,19 @@ vl_mpeg12_buffer_map(struct pipe_video_decode_buffer *buffer)
 
       buf->texels[i] = dec->pipe->transfer_map(dec->pipe, buf->tex_transfer[i]);
    }
+
+   if (dec->base.entrypoint == PIPE_VIDEO_ENTRYPOINT_BITSTREAM) {
+      struct pipe_ycbcr_block *ycbcr_stream[VL_MAX_PLANES];
+      struct pipe_motionvector *mv_stream[VL_MAX_REF_FRAMES];
+
+      for (i = 0; i < VL_MAX_PLANES; ++i)
+         ycbcr_stream[i] = vl_vb_get_ycbcr_stream(&buf->vertex_stream, i);
+
+      for (i = 0; i < VL_MAX_REF_FRAMES; ++i)
+         mv_stream[i] = vl_vb_get_mv_stream(&buf->vertex_stream, i);
+
+      vl_mpg12_bs_set_buffers(&buf->bs, ycbcr_stream, buf->texels, mv_stream);
+   }
 }
 
 static struct pipe_ycbcr_block *
@@ -390,6 +403,17 @@ vl_mpeg12_buffer_get_mv_stream(struct pipe_video_decode_buffer *buffer, int ref_
 }
 
 static void
+vl_mpeg12_buffer_decode_bitstream(struct pipe_video_decode_buffer *buffer,
+                                  unsigned num_bytes, const void *data,
+                                  struct pipe_mpeg12_picture_desc *picture,
+                                  unsigned num_ycbcr_blocks[3])
+{
+   struct vl_mpeg12_buffer *buf = (struct vl_mpeg12_buffer*)buffer;
+
+   vl_mpg12_bs_decode(&buf->bs, num_bytes, data, picture, num_ycbcr_blocks);
+}
+
+static void
 vl_mpeg12_buffer_unmap(struct pipe_video_decode_buffer *buffer)
 {
    struct vl_mpeg12_buffer *buf = (struct vl_mpeg12_buffer*)buffer;
@@ -462,6 +486,7 @@ vl_mpeg12_create_buffer(struct pipe_video_decoder *decoder)
    buffer->base.get_ycbcr_buffer = vl_mpeg12_buffer_get_ycbcr_buffer;
    buffer->base.get_mv_stream_stride = vl_mpeg12_buffer_get_mv_stream_stride;
    buffer->base.get_mv_stream = vl_mpeg12_buffer_get_mv_stream;
+   buffer->base.decode_bitstream = vl_mpeg12_buffer_decode_bitstream;
    buffer->base.unmap = vl_mpeg12_buffer_unmap;
 
    if (!vl_vb_init(&buffer->vertex_stream, dec->pipe,
@@ -479,6 +504,9 @@ vl_mpeg12_create_buffer(struct pipe_video_decoder *decoder)
    if (!init_zscan_buffer(buffer))
       goto error_zscan;
 
+   if (dec->base.entrypoint == PIPE_VIDEO_ENTRYPOINT_BITSTREAM)
+      vl_mpg12_bs_init(&buffer->bs, dec->base.width, dec->base.height);
+
    return &buffer->base;
 
 error_zscan:
diff --git a/src/gallium/auxiliary/vl/vl_mpeg12_decoder.h b/src/gallium/auxiliary/vl/vl_mpeg12_decoder.h
index e483ace03b4..66356694b59 100644
--- a/src/gallium/auxiliary/vl/vl_mpeg12_decoder.h
+++ b/src/gallium/auxiliary/vl/vl_mpeg12_decoder.h
@@ -30,6 +30,7 @@
 
 #include <pipe/p_video_context.h>
 
+#include "vl_mpeg12_bitstream.h"
 #include "vl_zscan.h"
 #include "vl_idct.h"
 #include "vl_mc.h"
@@ -80,6 +81,7 @@ struct vl_mpeg12_buffer
    struct pipe_video_buffer *idct_source;
    struct pipe_video_buffer *mc_source;
 
+   struct vl_mpg12_bs bs;
    struct vl_zscan_buffer zscan[VL_MAX_PLANES];
    struct vl_idct_buffer idct[VL_MAX_PLANES];
    struct vl_mc_buffer mc[VL_MAX_PLANES];
diff --git a/src/gallium/auxiliary/vl/vl_vlc.h b/src/gallium/auxiliary/vl/vl_vlc.h
new file mode 100644
index 00000000000..8c5b3aca47d
--- /dev/null
+++ b/src/gallium/auxiliary/vl/vl_vlc.h
@@ -0,0 +1,138 @@
+/**************************************************************************
+ *
+ * Copyright 2011 Christian König.
+ * All Rights Reserved.
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the
+ * "Software"), to deal in the Software without restriction, including
+ * without limitation the rights to use, copy, modify, merge, publish,
+ * distribute, sub license, and/or sell copies of the Software, and to
+ * permit persons to whom the Software is furnished to do so, subject to
+ * the following conditions:
+ *
+ * The above copyright notice and this permission notice (including the
+ * next paragraph) shall be included in all copies or substantial portions
+ * of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
+ * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT.
+ * IN NO EVENT SHALL TUNGSTEN GRAPHICS AND/OR ITS SUPPLIERS BE LIABLE FOR
+ * ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
+ * TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
+ * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+ *
+ **************************************************************************/
+
+/**
+ * This file is based uppon slice_xvmc.c and vlc.h from the xine project,
+ * which in turn is based on mpeg2dec. The following is the original copyright:
+ *
+ * Copyright (C) 2000-2002 Michel Lespinasse <[email protected]>
+ * Copyright (C) 1999-2000 Aaron Holtzman <[email protected]>
+ *
+ * This file is part of mpeg2dec, a free MPEG-2 video stream decoder.
+ * See http://libmpeg2.sourceforge.net/ for updates.
+ *
+ * mpeg2dec is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * mpeg2dec 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 General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
+ */
+
+#ifndef vl_vlc_h
+#define vl_vlc_h
+
+struct vl_vlc
+{
+   uint32_t buf; /* current 32 bit working set of buffer */
+   int bits;     /* used bits in working set */
+   const uint8_t *ptr; /* buffer with stream data */
+   const uint8_t *max; /* ptr+len of buffer */
+};
+
+static inline void
+vl_vlc_restart(struct vl_vlc *vlc)
+{
+   vlc->buf = (vlc->ptr[0] << 24) | (vlc->ptr[1] << 16) | (vlc->ptr[2] << 8) | vlc->ptr[3];
+   vlc->bits = -16;
+   vlc->ptr += 4;
+}
+
+static inline void
+vl_vlc_init(struct vl_vlc *vlc, const uint8_t *data, unsigned len)
+{
+   vlc->ptr = data;
+   vlc->max = data + len;
+   vl_vlc_restart(vlc);
+}
+
+static inline bool
+vl_vlc_getbyte(struct vl_vlc *vlc)
+{
+   vlc->buf <<= 8;
+   vlc->buf |= vlc->ptr[0];
+   vlc->ptr++;
+   return vlc->ptr < vlc->max;
+}
+
+#define vl_vlc_getword(vlc, shift)                                      \
+do {                                                                    \
+   (vlc)->buf |= (((vlc)->ptr[0] << 8) | (vlc)->ptr[1]) << (shift);     \
+   (vlc)->ptr += 2;                                                     \
+} while (0)
+
+/* make sure that there are at least 16 valid bits in bit_buf */
+#define vl_vlc_needbits(vlc)                    \
+do {                                            \
+    if ((vlc)->bits >= 0) {                      \
+	vl_vlc_getword(vlc, (vlc)->bits);       \
+	(vlc)->bits -= 16;                      \
+    }                                           \
+} while (0)
+
+/* make sure that the full 32 bit of the buffer are valid */
+static inline void
+vl_vlc_need32bits(struct vl_vlc *vlc)
+{
+   vl_vlc_needbits(vlc);
+   if (vlc->bits > -8) {
+      unsigned n = -vlc->bits;
+      vlc->buf <<= n;
+      vlc->buf |= *vlc->ptr << 8;
+      vlc->bits = -8;
+      vlc->ptr++;
+   }
+   if (vlc->bits > -16) {
+      unsigned n = -vlc->bits - 8;
+      vlc->buf <<= n;
+      vlc->buf |= *vlc->ptr;
+      vlc->bits = -16;
+      vlc->ptr++;
+   }
+}
+
+/* remove num valid bits from bit_buf */
+#define vl_vlc_dumpbits(vlc, num)       \
+do {					\
+    (vlc)->buf <<= (num);		\
+    (vlc)->bits += (num);		\
+} while (0)
+
+/* take num bits from the high part of bit_buf and zero extend them */
+#define vl_vlc_ubits(vlc, num) (((uint32_t)((vlc)->buf)) >> (32 - (num)))
+
+/* take num bits from the high part of bit_buf and sign extend them */
+#define vl_vlc_sbits(vlc, num) (((int32_t)((vlc)->buf)) >> (32 - (num)))
+
+#endif /* vl_vlc_h */