[Mesa-dev] [PATCH 5/6] vl: Remove most members of pipe_video_decoder

Christian König deathsimple at vodafone.de
Mon Dec 19 05:50:12 PST 2011


Hey Maarten,

I would first suggest that you try to split that patch up into smaller 
parts.

Christian.


On 18.12.2011 18:40, Maarten Lankhorst wrote:
> Hey Andy,
>
> On 12/07/2011 05:48 PM, Andy Furniss wrote:
>> Maarten Lankhorst wrote:
>>
>>> Hm, could you test with some added sanity checks?
>> mplayer: vl/vl_vlc.h:139: vl_vlc_eatbits: Assertion `vlc->valid_bits>  num_bits' failed.
>>
>>> If that works, maybe remove the vl_vlc_fillbits call I added in vl_mpeg12_bs_decode
>>> to see if that is what caused it. Unfortunately the bitstream parser just fails to work
>>> correctly here on a lot of my test videos, but that happens even without this patch.
>> Yea, since the rewrite I have seen some crashes - only at the end of some transport streams and only so far with svn mplayer, release mplayer doesn't do it.
>>
>>> You might want to check with valgrind to see if it tosses any warning, too.
>>> I don't suppose you have a short clip of the failing video that reproduces the problem?
>> Anything should do - I haven't found one that works yet, mpeg1, mpeg2 progressive/interlaced, TS, PS, SD, HD with release mplayer or svn, all crash before rendering anything.
>>
>>
> Ok looks like I found the issue, could you try the version below?
>
> ---
>   src/gallium/auxiliary/vl/vl_decoder.c              |   13 -
>   src/gallium/auxiliary/vl/vl_decoder.h              |    6 -
>   src/gallium/auxiliary/vl/vl_idct.c                 |   14 +-
>   src/gallium/auxiliary/vl/vl_mpeg12_bitstream.c     |   66 +++---
>   src/gallium/auxiliary/vl/vl_mpeg12_bitstream.h     |    4 +-
>   src/gallium/auxiliary/vl/vl_mpeg12_decoder.c       |  124 ++++-----
>   src/gallium/auxiliary/vl/vl_mpeg12_decoder.h       |    3 +-
>   src/gallium/auxiliary/vl/vl_vlc.h                  |   38 ++-
>   src/gallium/drivers/nouveau/nouveau_video.c        |   57 +---
>   src/gallium/drivers/nvfx/nvfx_screen.c             |    2 -
>   src/gallium/drivers/r300/r300_screen.c             |    2 -
>   src/gallium/drivers/r600/r600_pipe.c               |    2 -
>   src/gallium/drivers/softpipe/sp_screen.c           |    2 -
>   src/gallium/include/pipe/p_video_decoder.h         |   58 +----
>   src/gallium/include/pipe/p_video_enums.h           |    3 +-
>   src/gallium/include/pipe/p_video_state.h           |   15 +-
>   src/gallium/state_trackers/vdpau/decode.c          |  295 ++++++++------------
>   src/gallium/state_trackers/vdpau/vdpau_private.h   |    3 -
>   src/gallium/state_trackers/xorg/xvmc/surface.c     |  109 +-------
>   .../state_trackers/xorg/xvmc/xvmc_private.h        |    1 -
>   20 files changed, 278 insertions(+), 539 deletions(-)
>
> diff --git a/src/gallium/auxiliary/vl/vl_decoder.c b/src/gallium/auxiliary/vl/vl_decoder.c
> index 383e02d..da905a6 100644
> --- a/src/gallium/auxiliary/vl/vl_decoder.c
> +++ b/src/gallium/auxiliary/vl/vl_decoder.c
> @@ -44,19 +44,6 @@ vl_profile_supported(struct pipe_screen *screen, enum pipe_video_profile profile
>      }
>   }
>
> -unsigned
> -vl_num_buffers_desired(struct pipe_screen *screen, enum pipe_video_profile profile)
> -{
> -   assert(screen);
> -   switch (u_reduce_video_profile(profile)) {
> -      case PIPE_VIDEO_CODEC_MPEG12:
> -         return 4;
> -
> -      default:
> -         return 1;
> -   }
> -}
> -
>   struct pipe_video_decoder *
>   vl_create_decoder(struct pipe_context *pipe,
>                     enum pipe_video_profile profile,
> diff --git a/src/gallium/auxiliary/vl/vl_decoder.h b/src/gallium/auxiliary/vl/vl_decoder.h
> index a997516..a7abe9c 100644
> --- a/src/gallium/auxiliary/vl/vl_decoder.h
> +++ b/src/gallium/auxiliary/vl/vl_decoder.h
> @@ -38,12 +38,6 @@ bool
>   vl_profile_supported(struct pipe_screen *screen, enum pipe_video_profile profile);
>
>   /**
> - * the desired number of buffers for optimal operation
> - */
> -unsigned
> -vl_num_buffers_desired(struct pipe_screen *screen, enum pipe_video_profile profile);
> -
> -/**
>    * standard implementation of pipe->create_video_decoder
>    */
>   struct pipe_video_decoder *
> diff --git a/src/gallium/auxiliary/vl/vl_idct.c b/src/gallium/auxiliary/vl/vl_idct.c
> index a2b3537..8394542 100644
> --- a/src/gallium/auxiliary/vl/vl_idct.c
> +++ b/src/gallium/auxiliary/vl/vl_idct.c
> @@ -614,9 +614,9 @@ init_source(struct vl_idct *idct, struct vl_idct_buffer *buffer)
>   }
>
>   static void
> -cleanup_source(struct vl_idct *idct, struct vl_idct_buffer *buffer)
> +cleanup_source(struct vl_idct_buffer *buffer)
>   {
> -   assert(idct&&  buffer);
> +   assert(buffer);
>
>      pipe_surface_reference(&buffer->fb_state_mismatch.cbufs[0], NULL);
>
> @@ -665,13 +665,13 @@ error_surfaces:
>   }
>
>   static void
> -cleanup_intermediate(struct vl_idct *idct, struct vl_idct_buffer *buffer)
> +cleanup_intermediate(struct vl_idct_buffer *buffer)
>   {
>      unsigned i;
>
> -   assert(idct&&  buffer);
> +   assert(buffer);
>
> -   for(i = 0; i<  idct->nr_of_render_targets; ++i)
> +   for(i = 0; i<  buffer->fb_state.nr_cbufs; ++i)
>         pipe_surface_reference(&buffer->fb_state.cbufs[i], NULL);
>
>      pipe_sampler_view_reference(&buffer->sampler_views.individual.intermediate, NULL);
> @@ -823,8 +823,8 @@ vl_idct_cleanup_buffer(struct vl_idct_buffer *buffer)
>   {
>      assert(buffer);
>
> -   cleanup_source(buffer->idct, buffer);
> -   cleanup_intermediate(buffer->idct, buffer);
> +   cleanup_source(buffer);
> +   cleanup_intermediate(buffer);
>
>      pipe_sampler_view_reference(&buffer->sampler_views.individual.matrix, NULL);
>      pipe_sampler_view_reference(&buffer->sampler_views.individual.transpose, NULL);
> diff --git a/src/gallium/auxiliary/vl/vl_mpeg12_bitstream.c b/src/gallium/auxiliary/vl/vl_mpeg12_bitstream.c
> index 936cf2c..dfa815f 100644
> --- a/src/gallium/auxiliary/vl/vl_mpeg12_bitstream.c
> +++ b/src/gallium/auxiliary/vl/vl_mpeg12_bitstream.c
> @@ -787,7 +787,7 @@ entry:
>   }
>
>   static INLINE bool
> -decode_slice(struct vl_mpg12_bs *bs)
> +decode_slice(struct vl_mpg12_bs *bs, unsigned code)
>   {
>      struct pipe_mpeg12_macroblock mb;
>      short dct_blocks[64*6];
> @@ -796,24 +796,30 @@ decode_slice(struct vl_mpg12_bs *bs)
>
>      memset(&mb, 0, sizeof(mb));
>      mb.base.codec = PIPE_VIDEO_CODEC_MPEG12;
> -   mb.y = vl_vlc_get_uimsbf(&bs->vlc, 8) - 1;
> +   vl_vlc_fillbits(&bs->vlc);
> +   mb.y = code - 1;
>      mb.blocks = dct_blocks;
>
>      reset_predictor(bs);
> +   vl_vlc_fillbits(&bs->vlc);
>      dct_scale = quant_scale[bs->desc.q_scale_type][vl_vlc_get_uimsbf(&bs->vlc, 5)];
>
> -   if (vl_vlc_get_uimsbf(&bs->vlc, 1))
> +   if (vl_vlc_get_uimsbf(&bs->vlc, 1)) {
> +      vl_vlc_fillbits(&bs->vlc);
>         while (vl_vlc_get_uimsbf(&bs->vlc, 9)&  1)
>            vl_vlc_fillbits(&bs->vlc);
> +   }
>
>      vl_vlc_fillbits(&bs->vlc);
> +   assert(vl_vlc_bits_left(&bs->vlc)>  23&&  vl_vlc_peekbits(&bs->vlc, 23));
>      do {
>         int inc = 0;
>
> -      while (vl_vlc_peekbits(&bs->vlc, 11) == 15) {
> -         vl_vlc_eatbits(&bs->vlc, 11);
> -         vl_vlc_fillbits(&bs->vlc);
> -      }
> +      if (bs->decoder->profile == PIPE_VIDEO_PROFILE_MPEG1)
> +         while (vl_vlc_peekbits(&bs->vlc, 11) == 15) {
> +            vl_vlc_eatbits(&bs->vlc, 11);
> +            vl_vlc_fillbits(&bs->vlc);
> +         }
>
>         while (vl_vlc_peekbits(&bs->vlc, 11) == 8) {
>            vl_vlc_eatbits(&bs->vlc, 11);
> @@ -823,7 +829,7 @@ decode_slice(struct vl_mpg12_bs *bs)
>         inc += vl_vlc_get_vlclbf(&bs->vlc, tbl_B1, 11);
>         if (x != -1) {
>            mb.num_skipped_macroblocks = inc - 1;
> -         bs->decoder->decode_macroblock(bs->decoder,&mb.base, 1);
> +         bs->decoder->decode_macroblock(bs->decoder, NULL, NULL,&mb.base, 1);
>         }
>         mb.x = x += inc;
>
> @@ -924,10 +930,10 @@ decode_slice(struct vl_mpg12_bs *bs)
>            mb.coded_block_pattern = 0;
>
>         vl_vlc_fillbits(&bs->vlc);
> -   } while (vl_vlc_bits_left(&bs->vlc)&&  vl_vlc_peekbits(&bs->vlc, 23));
> +   } while (vl_vlc_bits_left(&bs->vlc)>  23&&  vl_vlc_peekbits(&bs->vlc, 23));
>
>      mb.num_skipped_macroblocks = 0;
> -   bs->decoder->decode_macroblock(bs->decoder,&mb.base, 1);
> +   bs->decoder->decode_macroblock(bs->decoder, NULL, NULL,&mb.base, 1);
>      return true;
>   }
>
> @@ -956,35 +962,29 @@ vl_mpg12_bs_set_picture_desc(struct vl_mpg12_bs *bs, struct pipe_mpeg12_picture_
>   }
>
>   void
> -vl_mpg12_bs_decode(struct vl_mpg12_bs *bs, unsigned num_bytes, const uint8_t *buffer)
> +vl_mpg12_bs_decode(struct vl_mpg12_bs *bs,
> +                   unsigned n, unsigned len,
> +                   const unsigned *lens, const void* const*buffer)
>   {
>      assert(bs);
> -   assert(buffer&&  num_bytes);
> +   assert(buffer&&  n&&  len);
>
> -   while(num_bytes>  2) {
> -      if (buffer[0] == 0x00&&  buffer[1] == 0x00&&  buffer[2] == 0x01&&
> -	buffer[3]>= 0x01&&  buffer[3]<  0xAF) {
> -         unsigned consumed;
> +   vl_vlc_init(&bs->vlc, n, len, buffer, lens);
>
> -         buffer += 3;
> -         num_bytes -= 3;
> -
> -         vl_vlc_init(&bs->vlc, buffer, num_bytes);
> -
> -         if (!decode_slice(bs))
> +   while (vl_vlc_bits_left(&bs->vlc)>= 32) {
> +      vl_vlc_fillbits(&bs->vlc);
> +      if (vl_vlc_peekbits(&bs->vlc, 24) == 0x000001) {
> +         unsigned code;
> +         vl_vlc_eatbits(&bs->vlc, 24);
> +         code = vl_vlc_get_uimsbf(&bs->vlc, 8);
> +         if (!code || code>  0xaf)
> +            continue;
> +         if (!decode_slice(bs, code))
>               return;
> -
> -         consumed = num_bytes - vl_vlc_bits_left(&bs->vlc) / 8;
> -
> -         /* crap, this is a bug we have consumed more bytes than left in the buffer */
> -         assert(consumed<= num_bytes);
> -
> -         num_bytes -= consumed;
> -         buffer += consumed;
> -
> +         vl_vlc_bitalign(&bs->vlc);
>         } else {
> -         ++buffer;
> -         --num_bytes;
> +         vl_vlc_eatbits(&bs->vlc, 8);
> +         continue;
>         }
>      }
>   }
> diff --git a/src/gallium/auxiliary/vl/vl_mpeg12_bitstream.h b/src/gallium/auxiliary/vl/vl_mpeg12_bitstream.h
> index c3f14a1..7a2b59f 100644
> --- a/src/gallium/auxiliary/vl/vl_mpeg12_bitstream.h
> +++ b/src/gallium/auxiliary/vl/vl_mpeg12_bitstream.h
> @@ -49,6 +49,8 @@ void
>   vl_mpg12_bs_set_picture_desc(struct vl_mpg12_bs *bs, struct pipe_mpeg12_picture_desc *picture);
>
>   void
> -vl_mpg12_bs_decode(struct vl_mpg12_bs *bs, unsigned num_bytes, const uint8_t *buffer);
> +vl_mpg12_bs_decode(struct vl_mpg12_bs *bs,
> +                   unsigned n, unsigned len,
> +                   const unsigned *lens, const void* const*buffer);
>
>   #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 2442d78..16f1129 100644
> --- a/src/gallium/auxiliary/vl/vl_mpeg12_decoder.c
> +++ b/src/gallium/auxiliary/vl/vl_mpeg12_decoder.c
> @@ -48,6 +48,12 @@ struct format_config {
>      float mc_scale;
>   };
>
> +static void
> +vl_mpeg12_destroy_buffer(struct pipe_video_decoder *decoder, void *buffer);
> +
> +static void
> +vl_mpeg12_end_frame(struct pipe_video_decoder *decoder);
> +
>   static const struct format_config bitstream_format_config[] = {
>   //   { PIPE_FORMAT_R16_SSCALED, PIPE_FORMAT_R16G16B16A16_SSCALED, PIPE_FORMAT_R16G16B16A16_FLOAT, 1.0f, SCALE_FACTOR_SSCALED },
>   //   { PIPE_FORMAT_R16_SSCALED, PIPE_FORMAT_R16G16B16A16_SSCALED, PIPE_FORMAT_R16G16B16A16_SSCALED, 1.0f, SCALE_FACTOR_SSCALED },
> @@ -388,6 +394,7 @@ vl_mpeg12_destroy(struct pipe_video_decoder *decoder)
>      struct vl_mpeg12_decoder *dec = (struct vl_mpeg12_decoder*)decoder;
>
>      assert(decoder);
> +   vl_mpeg12_destroy_buffer(decoder, dec->current_buffer);
>
>      /* Asserted in softpipe_delete_fs_state() for some reason */
>      dec->base.context->bind_vs_state(dec->base.context, NULL);
> @@ -490,39 +497,36 @@ vl_mpeg12_destroy_buffer(struct pipe_video_decoder *decoder, void *buffer)
>   }
>
>   static void
> -vl_mpeg12_set_decode_buffer(struct pipe_video_decoder *decoder, void *buffer)
> -{
> -   struct vl_mpeg12_decoder *dec = (struct vl_mpeg12_decoder *)decoder;
> -
> -   assert(dec&&  buffer);
> -
> -   dec->current_buffer = buffer;
> -}
> -
> -static void
>   vl_mpeg12_set_picture_parameters(struct pipe_video_decoder *decoder,
>                                    struct pipe_picture_desc *picture)
>   {
>      struct vl_mpeg12_decoder *dec = (struct vl_mpeg12_decoder *)decoder;
>      struct pipe_mpeg12_picture_desc *pic = (struct pipe_mpeg12_picture_desc *)picture;
> +   struct pipe_sampler_view **sv;
> +   unsigned j;
>
>      assert(dec&&  pic);
>
>      dec->picture_desc = *pic;
> -}
> -
> -static void
> -vl_mpeg12_set_quant_matrix(struct pipe_video_decoder *decoder,
> -                           const struct pipe_quant_matrix *matrix)
> -{
> -   struct vl_mpeg12_decoder *dec = (struct vl_mpeg12_decoder *)decoder;
> -   const struct pipe_mpeg12_quant_matrix *m = (const struct pipe_mpeg12_quant_matrix *)matrix;
> -
> -   assert(dec);
> -   assert(matrix->codec == PIPE_VIDEO_CODEC_MPEG12);
> +   if (dec->base.entrypoint<= PIPE_VIDEO_ENTRYPOINT_BITSTREAM) {
> +      memcpy(dec->intra_matrix, pic->intra_matrix, 64);
> +      memcpy(dec->non_intra_matrix, pic->non_intra_matrix, 64);
> +   }
> +   if (pic->ref_forward) {
> +      sv = pic->ref_forward->get_sampler_view_planes(pic->ref_forward);
> +      for (j = 0; j<  VL_MAX_PLANES; ++j)
> +         pipe_sampler_view_reference(&dec->ref_frames[0][j], sv[j]);
> +   } else
> +      for (j = 0; j<  VL_MAX_PLANES; ++j)
> +         pipe_sampler_view_reference(&dec->ref_frames[0][j], NULL);
>
> -   memcpy(dec->intra_matrix, m->intra_matrix, 64);
> -   memcpy(dec->non_intra_matrix, m->non_intra_matrix, 64);
> +   if (pic->ref_backward) {
> +      sv = pic->ref_backward->get_sampler_view_planes(pic->ref_backward);
> +      for (j = 0; j<  VL_MAX_PLANES; ++j)
> +         pipe_sampler_view_reference(&dec->ref_frames[1][j], sv[j]);
> +   } else
> +      for (j = 0; j<  VL_MAX_PLANES; ++j)
> +         pipe_sampler_view_reference(&dec->ref_frames[1][j], NULL);
>   }
>
>   static void
> @@ -538,29 +542,7 @@ vl_mpeg12_set_decode_target(struct pipe_video_decoder *decoder,
>      surfaces = target->get_surfaces(target);
>      for (i = 0; i<  VL_MAX_PLANES; ++i)
>         pipe_surface_reference(&dec->target_surfaces[i], surfaces[i]);
> -}
> -
> -static void
> -vl_mpeg12_set_reference_frames(struct pipe_video_decoder *decoder,
> -                               struct pipe_video_buffer **ref_frames,
> -                               unsigned num_ref_frames)
> -{
> -   struct vl_mpeg12_decoder *dec = (struct vl_mpeg12_decoder *)decoder;
> -   struct pipe_sampler_view **sv;
> -   unsigned i,j;
> -
> -   assert(dec);
> -   assert(num_ref_frames<= VL_MAX_REF_FRAMES);
> -
> -   for (i = 0; i<  num_ref_frames; ++i) {
> -      sv = ref_frames[i]->get_sampler_view_planes(ref_frames[i]);
> -      for (j = 0; j<  VL_MAX_PLANES; ++j)
> -         pipe_sampler_view_reference(&dec->ref_frames[i][j], sv[j]);
> -   }
> -
> -   for (; i<  VL_MAX_REF_FRAMES; ++i)
> -      for (j = 0; j<  VL_MAX_PLANES; ++j)
> -         pipe_sampler_view_reference(&dec->ref_frames[i][j], NULL);
> +   dec->last_target = (struct vl_video_buffer*)target;
>   }
>
>   static void
> @@ -619,19 +601,29 @@ vl_mpeg12_begin_frame(struct pipe_video_decoder *decoder)
>         for (i = 0; i<  VL_MAX_PLANES; ++i)
>            vl_zscan_set_layout(&buf->zscan[i], dec->zscan_linear);
>      }
> +   dec->started = 1;
>   }
>
>   static void
>   vl_mpeg12_decode_macroblock(struct pipe_video_decoder *decoder,
> +                            struct pipe_video_buffer *target,
> +                            struct pipe_picture_desc *picture,
>                               const struct pipe_macroblock *macroblocks,
>                               unsigned num_macroblocks)
>   {
>      struct vl_mpeg12_decoder *dec = (struct vl_mpeg12_decoder *)decoder;
>      const struct pipe_mpeg12_macroblock *mb = (const struct pipe_mpeg12_macroblock *)macroblocks;
>      struct vl_mpeg12_buffer *buf;
> -
>      unsigned i, j, mv_weights[2];
>
> +   if (picture)
> +      vl_mpeg12_set_picture_parameters(decoder, picture);
> +   if (target&&  (!dec->started || target !=&dec->last_target->base)) {
> +      vl_mpeg12_end_frame(decoder);
> +      vl_mpeg12_set_decode_target(decoder, target);
> +      vl_mpeg12_begin_frame(decoder);
> +   }
> +
>      assert(dec&&  dec->current_buffer);
>      assert(macroblocks&&  macroblocks->codec == PIPE_VIDEO_CODEC_MPEG12);
>
> @@ -690,23 +682,30 @@ vl_mpeg12_decode_macroblock(struct pipe_video_decoder *decoder,
>
>   static void
>   vl_mpeg12_decode_bitstream(struct pipe_video_decoder *decoder,
> -                           unsigned num_bytes, const void *data)
> +                           struct pipe_video_buffer *target,
> +                           struct pipe_picture_desc *picture,
> +                           unsigned n, unsigned total_len,
> +                           const unsigned *lens, const void *const*data)
>   {
>      struct vl_mpeg12_decoder *dec = (struct vl_mpeg12_decoder *)decoder;
>      struct vl_mpeg12_buffer *buf;
>
>      unsigned i;
>
> +   vl_mpeg12_set_picture_parameters(decoder, picture);
> +   vl_mpeg12_set_decode_target(decoder, target);
>      assert(dec&&  dec->current_buffer);
>
>      buf = dec->current_buffer;
>      assert(buf);
> +   vl_mpeg12_begin_frame(decoder);
>
>      for (i = 0; i<  VL_MAX_PLANES; ++i)
>         vl_zscan_set_layout(&buf->zscan[i], dec->picture_desc.alternate_scan ?
>                             dec->zscan_alternate : dec->zscan_normal);
>
> -   vl_mpg12_bs_decode(&buf->bs, num_bytes, data);
> +   vl_mpg12_bs_decode(&buf->bs, n, total_len, lens, data);
> +   vl_mpeg12_end_frame(decoder);
>   }
>
>   static void
> @@ -716,11 +715,13 @@ vl_mpeg12_end_frame(struct pipe_video_decoder *decoder)
>      struct pipe_sampler_view **mc_source_sv;
>      struct pipe_vertex_buffer vb[3];
>      struct vl_mpeg12_buffer *buf;
> -
>      unsigned i, j, component;
>      unsigned nr_components;
>
>      assert(dec&&  dec->current_buffer);
> +   if (!dec->started)
> +      return;
> +   dec->started = 0;
>
>      buf = dec->current_buffer;
>
> @@ -783,14 +784,6 @@ vl_mpeg12_end_frame(struct pipe_video_decoder *decoder)
>      }
>   }
>
> -static void
> -vl_mpeg12_flush(struct pipe_video_decoder *decoder)
> -{
> -   assert(decoder);
> -
> -   //Noop, for shaders it is much faster to flush everything in end_frame
> -}
> -
>   static bool
>   init_pipe_state(struct vl_mpeg12_decoder *dec)
>   {
> @@ -1057,18 +1050,9 @@ vl_create_mpeg12_decoder(struct pipe_context *context,
>      dec->base.max_references = max_references;
>
>      dec->base.destroy = vl_mpeg12_destroy;
> -   dec->base.create_buffer = vl_mpeg12_create_buffer;
> -   dec->base.destroy_buffer = vl_mpeg12_destroy_buffer;
> -   dec->base.set_decode_buffer = vl_mpeg12_set_decode_buffer;
> -   dec->base.set_picture_parameters = vl_mpeg12_set_picture_parameters;
> -   dec->base.set_quant_matrix = vl_mpeg12_set_quant_matrix;
> -   dec->base.set_decode_target = vl_mpeg12_set_decode_target;
> -   dec->base.set_reference_frames = vl_mpeg12_set_reference_frames;
> -   dec->base.begin_frame = vl_mpeg12_begin_frame;
>      dec->base.decode_macroblock = vl_mpeg12_decode_macroblock;
>      dec->base.decode_bitstream = vl_mpeg12_decode_bitstream;
> -   dec->base.end_frame = vl_mpeg12_end_frame;
> -   dec->base.flush = vl_mpeg12_flush;
> +   dec->base.flush = vl_mpeg12_end_frame;
>
>      dec->blocks_per_line = MAX2(util_next_power_of_two(dec->base.width) / block_size_pixels, 4);
>      dec->num_blocks = (dec->base.width * dec->base.height) / block_size_pixels;
> @@ -1152,7 +1136,9 @@ vl_create_mpeg12_decoder(struct pipe_context *context,
>
>      memset(dec->intra_matrix, 0x10, 64);
>      memset(dec->non_intra_matrix, 0x10, 64);
> -
> +   dec->current_buffer = vl_mpeg12_create_buffer(&dec->base);
> +   if (!dec->current_buffer)
> +      goto error_pipe_state;
>      return&dec->base;
>
>   error_pipe_state:
> diff --git a/src/gallium/auxiliary/vl/vl_mpeg12_decoder.h b/src/gallium/auxiliary/vl/vl_mpeg12_decoder.h
> index 817c1ff..0c81417 100644
> --- a/src/gallium/auxiliary/vl/vl_mpeg12_decoder.h
> +++ b/src/gallium/auxiliary/vl/vl_mpeg12_decoder.h
> @@ -49,13 +49,14 @@ struct vl_mpeg12_decoder
>
>      unsigned blocks_per_line;
>      unsigned num_blocks;
> -   unsigned width_in_macroblocks;
> +   unsigned width_in_macroblocks, started;
>
>      enum pipe_format zscan_source_format;
>
>      struct pipe_vertex_buffer quads;
>      struct pipe_vertex_buffer pos;
>
> +   struct vl_video_buffer *last_target;
>      void *ves_ycbcr;
>      void *ves_mv;
>
> diff --git a/src/gallium/auxiliary/vl/vl_vlc.h b/src/gallium/auxiliary/vl/vl_vlc.h
> index dc4faed..43764b5 100644
> --- a/src/gallium/auxiliary/vl/vl_vlc.h
> +++ b/src/gallium/auxiliary/vl/vl_vlc.h
> @@ -38,7 +38,7 @@
>   struct vl_vlc
>   {
>      uint64_t buffer;
> -   unsigned valid_bits;
> +   uint32_t valid_bits;
>      uint32_t *data;
>      uint32_t *end;
>   };
> @@ -74,11 +74,9 @@ vl_vlc_init_table(struct vl_vlc_entry *dst, unsigned dst_size, const struct vl_v
>   static INLINE void
>   vl_vlc_fillbits(struct vl_vlc *vlc)
>   {
> -   if (vlc->valid_bits<  32) {
> +   if (vlc->valid_bits<  32&&  vlc->data<  vlc->end) {
>         uint32_t value = *vlc->data;
>
> -      //assert(vlc->data<= vlc->end);
> -
>   #ifndef PIPE_ARCH_BIG_ENDIAN
>         value = util_bswap32(value);
>   #endif
> @@ -90,10 +88,14 @@ vl_vlc_fillbits(struct vl_vlc *vlc)
>   }
>
>   static INLINE void
> -vl_vlc_init(struct vl_vlc *vlc, const uint8_t *data, unsigned len)
> +vl_vlc_init(struct vl_vlc *vlc,
> +            const unsigned array_size, unsigned total_len,
> +            const const void *const *datas, const unsigned *lens)
>   {
> +   const uint8_t *data = datas[0];
>      assert(vlc);
> -   assert(data&&  len);
> +   assert(array_size == 1); // TODO
> +   assert(datas[0]&&  lens[0]);
>
>      vlc->buffer = 0;
>      vlc->valid_bits = 0;
> @@ -102,14 +104,17 @@ vl_vlc_init(struct vl_vlc *vlc, const uint8_t *data, unsigned len)
>      while (pointer_to_uintptr(data)&  3) {
>         vlc->buffer |= (uint64_t)*data<<  (56 - vlc->valid_bits);
>         ++data;
> -      --len;
> +      --total_len;
>         vlc->valid_bits += 8;
>      }
>      vlc->data = (uint32_t*)data;
> -   vlc->end = (uint32_t*)(data + len);
> +   vlc->end = (uint32_t*)(data + total_len);
>
> +   assert((!vlc->valid_bits&&  !vlc->buffer) || (vlc->valid_bits&&  !(vlc->buffer<<  vlc->valid_bits)));
>      vl_vlc_fillbits(vlc);
> +   assert((!vlc->valid_bits&&  !vlc->buffer) || (vlc->valid_bits&&  !(vlc->buffer<<  vlc->valid_bits)));
>      vl_vlc_fillbits(vlc);
> +   assert((!vlc->valid_bits&&  !vlc->buffer) || (vlc->valid_bits&&  !(vlc->buffer<<  vlc->valid_bits)));
>   }
>
>   static INLINE unsigned
> @@ -122,7 +127,7 @@ vl_vlc_bits_left(struct vl_vlc *vlc)
>   static INLINE unsigned
>   vl_vlc_peekbits(struct vl_vlc *vlc, unsigned num_bits)
>   {
> -   //assert(vlc->valid_bits>= num_bits);
> +   assert(vlc->valid_bits>= num_bits || vl_vlc_bits_left(vlc)<  num_bits);
>
>      return vlc->buffer>>  (64 - num_bits);
>   }
> @@ -130,10 +135,12 @@ vl_vlc_peekbits(struct vl_vlc *vlc, unsigned num_bits)
>   static INLINE void
>   vl_vlc_eatbits(struct vl_vlc *vlc, unsigned num_bits)
>   {
> -   //assert(vlc->valid_bits>  num_bits);
> +   assert(vlc->valid_bits>= num_bits);
>
> +   assert((!vlc->valid_bits&&  !vlc->buffer) || (vlc->valid_bits&&  !(vlc->buffer<<  vlc->valid_bits)));
>      vlc->buffer<<= num_bits;
>      vlc->valid_bits -= num_bits;
> +   assert((!vlc->valid_bits&&  !vlc->buffer) || (vlc->valid_bits&&  !(vlc->buffer<<  vlc->valid_bits)));
>   }
>
>   static INLINE unsigned
> @@ -141,7 +148,7 @@ vl_vlc_get_uimsbf(struct vl_vlc *vlc, unsigned num_bits)
>   {
>      unsigned value;
>
> -   //assert(vlc->valid_bits>= num_bits);
> +   assert(vlc->valid_bits>= num_bits);
>
>      value = vlc->buffer>>  (64 - num_bits);
>      vl_vlc_eatbits(vlc, num_bits);
> @@ -154,7 +161,7 @@ vl_vlc_get_simsbf(struct vl_vlc *vlc, unsigned num_bits)
>   {
>      signed value;
>
> -   //assert(vlc->valid_bits>= num_bits);
> +   assert(vlc->valid_bits>= num_bits);
>
>      value = ((int64_t)vlc->buffer)>>  (64 - num_bits);
>      vl_vlc_eatbits(vlc, num_bits);
> @@ -167,7 +174,14 @@ vl_vlc_get_vlclbf(struct vl_vlc *vlc, const struct vl_vlc_entry *tbl, unsigned n
>   {
>      tbl += vl_vlc_peekbits(vlc, num_bits);
>      vl_vlc_eatbits(vlc, tbl->length);
> +   assert(tbl->length);
>      return tbl->value;
>   }
>
> +static INLINE void
> +vl_vlc_bitalign(struct vl_vlc *vlc)
> +{
> +   vl_vlc_eatbits(vlc, vlc->valid_bits&  7);
> +}
> +
>   #endif /* vl_vlc_h */
> diff --git a/src/gallium/drivers/nouveau/nouveau_video.c b/src/gallium/drivers/nouveau/nouveau_video.c
> index 162e1aa..55c8ba2 100644
> --- a/src/gallium/drivers/nouveau/nouveau_video.c
> +++ b/src/gallium/drivers/nouveau/nouveau_video.c
> @@ -424,44 +424,24 @@ nouveau_decoder_surface_index(struct nouveau_decoder *dec,
>   }
>
>   static void
> -nouveau_decoder_set_picture_parameters(struct pipe_video_decoder *decoder,
> -                                       struct pipe_picture_desc *picture_desc)
> -{
> -   struct nouveau_decoder *dec = (struct nouveau_decoder *)decoder;
> -   struct pipe_mpeg12_picture_desc *desc;
> -   desc = (struct pipe_mpeg12_picture_desc *)picture_desc;
> -   dec->picture_structure = desc->picture_structure;
> -}
> -
> -static void
> -nouveau_decoder_set_reference_frames(struct pipe_video_decoder *decoder,
> -                                     struct pipe_video_buffer **buffers,
> -                                     unsigned count)
> -{
> -   struct nouveau_decoder *dec = (struct nouveau_decoder *)decoder;
> -   if (count>= 1&&  buffers[0])
> -      dec->past = nouveau_decoder_surface_index(dec, buffers[0]);
> -   if (count>= 2&&  buffers[1])
> -      dec->future = nouveau_decoder_surface_index(dec, buffers[1]);
> -}
> -
> -static void
> -nouveau_decoder_set_decode_target(struct pipe_video_decoder *decoder,
> -                                  struct pipe_video_buffer *buffer)
> -{
> -   struct nouveau_decoder *dec = (struct nouveau_decoder *)decoder;
> -   dec->current = nouveau_decoder_surface_index(dec, buffer);
> -}
> -
> -static void
>   nouveau_decoder_decode_macroblock(struct pipe_video_decoder *decoder,
> +                                  struct pipe_video_buffer *target,
> +                                  struct pipe_picture_desc *picture,
>                                     const struct pipe_macroblock *pipe_mb,
>                                     unsigned num_macroblocks)
>   {
>      struct nouveau_decoder *dec = (struct nouveau_decoder *)decoder;
> +   struct pipe_mpeg12_picture_desc *desc = (struct pipe_mpeg12_picture_desc*)picture;
>      const struct pipe_mpeg12_macroblock *mb;
>      unsigned i;
> +
> +   dec->current = nouveau_decoder_surface_index(dec, target);
>      assert(dec->current<  8);
> +   dec->picture_structure = desc->picture_structure;
> +   if (desc->ref_backward)
> +      dec->past = nouveau_decoder_surface_index(dec, desc->ref_backward);
> +   if (desc->ref_forward)
> +      dec->future = nouveau_decoder_surface_index(dec, desc->ref_forward);
>
>      if (nouveau_vpe_init(dec)) return;
>      mb = (const struct pipe_mpeg12_macroblock *)pipe_mb;
> @@ -511,16 +491,6 @@ nouveau_decoder_destroy(struct pipe_video_decoder *decoder)
>      FREE(dec);
>   }
>
> -static void
> -nouveau_decoder_begin_frame(struct pipe_video_decoder *decoder)
> -{
> -}
> -
> -static void
> -nouveau_decoder_end_frame(struct pipe_video_decoder *decoder)
> -{
> -}
> -
>   static struct pipe_video_decoder *
>   nouveau_create_decoder(struct pipe_context *context,
>                          struct nouveau_screen *screen,
> @@ -571,11 +541,6 @@ nouveau_create_decoder(struct pipe_context *context,
>      dec->base.height = height;
>      dec->base.max_references = max_references;
>      dec->base.destroy = nouveau_decoder_destroy;
> -   dec->base.begin_frame = nouveau_decoder_begin_frame;
> -   dec->base.end_frame = nouveau_decoder_end_frame;
> -   dec->base.set_decode_target = nouveau_decoder_set_decode_target;
> -   dec->base.set_picture_parameters = nouveau_decoder_set_picture_parameters;
> -   dec->base.set_reference_frames = nouveau_decoder_set_reference_frames;
>      dec->base.decode_macroblock = nouveau_decoder_decode_macroblock;
>      dec->base.flush = nouveau_decoder_flush;
>      dec->screen = screen;
> @@ -852,8 +817,6 @@ nouveau_screen_get_video_param(struct pipe_screen *pscreen,
>      case PIPE_VIDEO_CAP_MAX_WIDTH:
>      case PIPE_VIDEO_CAP_MAX_HEIGHT:
>         return vl_video_buffer_max_size(pscreen);
> -   case PIPE_VIDEO_CAP_NUM_BUFFERS_DESIRED:
> -      return vl_num_buffers_desired(pscreen, profile);
>      default:
>         debug_printf("unknown video param: %d\n", param);
>         return 0;
> diff --git a/src/gallium/drivers/nvfx/nvfx_screen.c b/src/gallium/drivers/nvfx/nvfx_screen.c
> index f56c697..a069771 100644
> --- a/src/gallium/drivers/nvfx/nvfx_screen.c
> +++ b/src/gallium/drivers/nvfx/nvfx_screen.c
> @@ -222,8 +222,6 @@ nvfx_screen_get_video_param(struct pipe_screen *screen,
>   	case PIPE_VIDEO_CAP_MAX_WIDTH:
>   	case PIPE_VIDEO_CAP_MAX_HEIGHT:
>   		return vl_video_buffer_max_size(screen);
> -	case PIPE_VIDEO_CAP_NUM_BUFFERS_DESIRED:
> -		return vl_num_buffers_desired(screen, profile);
>   	default:
>   		return 0;
>   	}
> diff --git a/src/gallium/drivers/r300/r300_screen.c b/src/gallium/drivers/r300/r300_screen.c
> index e734ff2..ceeb365 100644
> --- a/src/gallium/drivers/r300/r300_screen.c
> +++ b/src/gallium/drivers/r300/r300_screen.c
> @@ -302,8 +302,6 @@ static int r300_get_video_param(struct pipe_screen *screen,
>         case PIPE_VIDEO_CAP_MAX_WIDTH:
>         case PIPE_VIDEO_CAP_MAX_HEIGHT:
>            return vl_video_buffer_max_size(screen);
> -      case PIPE_VIDEO_CAP_NUM_BUFFERS_DESIRED:
> -         return vl_num_buffers_desired(screen, profile);
>         default:
>            return 0;
>      }
> diff --git a/src/gallium/drivers/r600/r600_pipe.c b/src/gallium/drivers/r600/r600_pipe.c
> index ddea167..1ea144d 100644
> --- a/src/gallium/drivers/r600/r600_pipe.c
> +++ b/src/gallium/drivers/r600/r600_pipe.c
> @@ -532,8 +532,6 @@ static int r600_get_video_param(struct pipe_screen *screen,
>   	case PIPE_VIDEO_CAP_MAX_WIDTH:
>   	case PIPE_VIDEO_CAP_MAX_HEIGHT:
>   		return vl_video_buffer_max_size(screen);
> -	case PIPE_VIDEO_CAP_NUM_BUFFERS_DESIRED:
> -		return vl_num_buffers_desired(screen, profile);
>   	default:
>   		return 0;
>   	}
> diff --git a/src/gallium/drivers/softpipe/sp_screen.c b/src/gallium/drivers/softpipe/sp_screen.c
> index 7a09be7..23f1c4d 100644
> --- a/src/gallium/drivers/softpipe/sp_screen.c
> +++ b/src/gallium/drivers/softpipe/sp_screen.c
> @@ -188,8 +188,6 @@ softpipe_get_video_param(struct pipe_screen *screen,
>      case PIPE_VIDEO_CAP_MAX_WIDTH:
>      case PIPE_VIDEO_CAP_MAX_HEIGHT:
>         return vl_video_buffer_max_size(screen);
> -   case PIPE_VIDEO_CAP_NUM_BUFFERS_DESIRED:
> -      return vl_num_buffers_desired(screen, profile);
>      default:
>         return 0;
>      }
> diff --git a/src/gallium/include/pipe/p_video_decoder.h b/src/gallium/include/pipe/p_video_decoder.h
> index 40b7dcd..a6c7933 100644
> --- a/src/gallium/include/pipe/p_video_decoder.h
> +++ b/src/gallium/include/pipe/p_video_decoder.h
> @@ -60,55 +60,11 @@ struct pipe_video_decoder
>      void (*destroy)(struct pipe_video_decoder *decoder);
>
>      /**
> -    * Creates a decoder buffer
> -    */
> -   void *(*create_buffer)(struct pipe_video_decoder *decoder);
> -
> -   /**
> -    * Destroys a decoder buffer
> -    */
> -   void (*destroy_buffer)(struct pipe_video_decoder *decoder, void *buffer);
> -
> -   /**
> -    * set the current decoder buffer
> -    */
> -   void (*set_decode_buffer)(struct pipe_video_decoder *decoder, void *buffer);
> -
> -   /**
> -    * set the picture parameters for the next frame
> -    * only used for bitstream decoding
> -    */
> -   void (*set_picture_parameters)(struct pipe_video_decoder *decoder,
> -                                  struct pipe_picture_desc *picture);
> -
> -   /**
> -    * set the quantification matrixes
> -    */
> -   void (*set_quant_matrix)(struct pipe_video_decoder *decoder,
> -                            const struct pipe_quant_matrix *matrix);
> -
> -   /**
> -    * set target where video data is decoded to
> -    */
> -   void (*set_decode_target)(struct pipe_video_decoder *decoder,
> -                             struct pipe_video_buffer *target);
> -
> -   /**
> -    * set reference frames for motion compensation
> -    */
> -   void (*set_reference_frames)(struct pipe_video_decoder *decoder,
> -                                struct pipe_video_buffer **ref_frames,
> -                                unsigned num_ref_frames);
> -
> -   /**
> -    * start decoding of a new frame
> -    */
> -   void (*begin_frame)(struct pipe_video_decoder *decoder);
> -
> -   /**
>       * decode a macroblock
>       */
>      void (*decode_macroblock)(struct pipe_video_decoder *decoder,
> +                             struct pipe_video_buffer *target,
> +                             struct pipe_picture_desc *picture,
>                                const struct pipe_macroblock *macroblocks,
>                                unsigned num_macroblocks);
>
> @@ -116,12 +72,10 @@ struct pipe_video_decoder
>       * decode a bitstream
>       */
>      void (*decode_bitstream)(struct pipe_video_decoder *decoder,
> -                            unsigned num_bytes, const void *data);
> -
> -   /**
> -    * end decoding of the current frame
> -    */
> -   void (*end_frame)(struct pipe_video_decoder *decoder);
> +                            struct pipe_video_buffer *target,
> +                            struct pipe_picture_desc *picture,
> +                            unsigned num_buffers, unsigned total_bytes,
> +                            unsigned const *num_bytes, const void *const *data);
>
>      /**
>       * flush any outstanding command buffers to the hardware
> diff --git a/src/gallium/include/pipe/p_video_enums.h b/src/gallium/include/pipe/p_video_enums.h
> index ea25a25..1378606 100644
> --- a/src/gallium/include/pipe/p_video_enums.h
> +++ b/src/gallium/include/pipe/p_video_enums.h
> @@ -50,8 +50,7 @@ enum pipe_video_cap
>      PIPE_VIDEO_CAP_SUPPORTED = 0,
>      PIPE_VIDEO_CAP_NPOT_TEXTURES = 1,
>      PIPE_VIDEO_CAP_MAX_WIDTH = 2,
> -   PIPE_VIDEO_CAP_MAX_HEIGHT = 3,
> -   PIPE_VIDEO_CAP_NUM_BUFFERS_DESIRED = 4
> +   PIPE_VIDEO_CAP_MAX_HEIGHT = 3
>   };
>
>   enum pipe_video_codec
> diff --git a/src/gallium/include/pipe/p_video_state.h b/src/gallium/include/pipe/p_video_state.h
> index 9a70eb7..0650b19 100644
> --- a/src/gallium/include/pipe/p_video_state.h
> +++ b/src/gallium/include/pipe/p_video_state.h
> @@ -124,6 +124,7 @@ struct pipe_macroblock
>   struct pipe_mpeg12_picture_desc
>   {
>      struct pipe_picture_desc base;
> +   struct pipe_video_buffer *ref_forward, *ref_backward;
>
>      unsigned picture_coding_type;
>      unsigned picture_structure;
> @@ -138,12 +139,6 @@ struct pipe_mpeg12_picture_desc
>      unsigned full_pel_forward_vector;
>      unsigned full_pel_backward_vector;
>      unsigned num_slices;
> -};
> -
> -struct pipe_mpeg12_quant_matrix
> -{
> -   struct pipe_quant_matrix base;
> -
>      const uint8_t *intra_matrix;
>      const uint8_t *non_intra_matrix;
>   };
> @@ -191,6 +186,7 @@ struct pipe_mpeg12_macroblock
>   struct pipe_mpeg4_picture_desc
>   {
>      struct pipe_picture_desc base;
> +   struct pipe_video_buffer *ref_forward, *ref_backward;
>      int32_t trd[2];
>      int32_t trb[2];
>      uint16_t vop_time_increment_resolution;
> @@ -205,12 +201,6 @@ struct pipe_mpeg4_picture_desc
>      uint8_t rounding_control;
>      uint8_t alternate_vertical_scan_flag;
>      uint8_t top_field_first;
> -};
> -
> -struct pipe_mpeg4_quant_matrix
> -{
> -   struct pipe_quant_matrix base;
> -
>      const uint8_t *intra_matrix;
>      const uint8_t *non_intra_matrix;
>   };
> @@ -218,6 +208,7 @@ struct pipe_mpeg4_quant_matrix
>   struct pipe_vc1_picture_desc
>   {
>      struct pipe_picture_desc base;
> +   struct pipe_video_buffer *ref_forward, *ref_backward;
>      uint32_t slice_count;
>      uint8_t picture_type;
>      uint8_t frame_coding_mode;
> diff --git a/src/gallium/state_trackers/vdpau/decode.c b/src/gallium/state_trackers/vdpau/decode.c
> index 47212e3..45009ef 100644
> --- a/src/gallium/state_trackers/vdpau/decode.c
> +++ b/src/gallium/state_trackers/vdpau/decode.c
> @@ -48,7 +48,6 @@ vlVdpDecoderCreate(VdpDevice device,
>      vlVdpDevice *dev;
>      vlVdpDecoder *vldecoder;
>      VdpStatus ret;
> -   unsigned i;
>      bool supported;
>
>      VDPAU_MSG(VDPAU_TRACE, "[VDPAU] Creating decoder\n");
> @@ -98,25 +97,6 @@ vlVdpDecoderCreate(VdpDevice device,
>         goto error_decoder;
>      }
>
> -   vldecoder->num_buffers = pipe->screen->get_video_param
> -   (
> -      pipe->screen, p_profile,
> -      PIPE_VIDEO_CAP_NUM_BUFFERS_DESIRED
> -   );
> -   vldecoder->cur_buffer = 0;
> -
> -   vldecoder->buffers = CALLOC(vldecoder->num_buffers, sizeof(void*));
> -   if (!vldecoder->buffers)
> -         goto error_alloc_buffers;
> -
> -   for (i = 0; i<  vldecoder->num_buffers; ++i) {
> -      vldecoder->buffers[i] = vldecoder->decoder->create_buffer(vldecoder->decoder);
> -      if (!vldecoder->buffers[i]) {
> -         ret = VDP_STATUS_ERROR;
> -         goto error_create_buffers;
> -      }
> -   }
> -
>      *decoder = vlAddDataHTAB(vldecoder);
>      if (*decoder == 0) {
>         ret = VDP_STATUS_ERROR;
> @@ -128,16 +108,6 @@ vlVdpDecoderCreate(VdpDevice device,
>      return VDP_STATUS_OK;
>
>   error_handle:
> -error_create_buffers:
> -
> -   for (i = 0; i<  vldecoder->num_buffers; ++i)
> -      if (vldecoder->buffers[i])
> -         vldecoder->decoder->destroy_buffer(vldecoder->decoder, vldecoder->buffers[i]);
> -
> -   FREE(vldecoder->buffers);
> -
> -error_alloc_buffers:
> -
>      vldecoder->decoder->destroy(vldecoder->decoder);
>
>   error_decoder:
> @@ -152,7 +122,6 @@ VdpStatus
>   vlVdpDecoderDestroy(VdpDecoder decoder)
>   {
>      vlVdpDecoder *vldecoder;
> -   unsigned i;
>
>      VDPAU_MSG(VDPAU_TRACE, "[VDPAU] Destroying decoder\n");
>
> @@ -160,12 +129,6 @@ vlVdpDecoderDestroy(VdpDecoder decoder)
>      if (!vldecoder)
>         return VDP_STATUS_INVALID_HANDLE;
>
> -   for (i = 0; i<  vldecoder->num_buffers; ++i)
> -      if (vldecoder->buffers[i])
> -         vldecoder->decoder->destroy_buffer(vldecoder->decoder, vldecoder->buffers[i]);
> -
> -   FREE(vldecoder->buffers);
> -
>      vldecoder->decoder->destroy(vldecoder->decoder);
>
>      FREE(vldecoder);
> @@ -201,62 +164,46 @@ vlVdpDecoderGetParameters(VdpDecoder decoder,
>    * Decode a mpeg 1/2 video.
>    */
>   static VdpStatus
> -vlVdpDecoderRenderMpeg12(struct pipe_video_decoder *decoder,
> +vlVdpDecoderRenderMpeg12(struct pipe_mpeg12_picture_desc *picture,
>                            VdpPictureInfoMPEG1Or2 *picture_info)
>   {
> -   struct pipe_mpeg12_picture_desc picture;
> -   struct pipe_mpeg12_quant_matrix quant;
> -   struct pipe_video_buffer *ref_frames[2];
> -   unsigned i;
> -
>      VDPAU_MSG(VDPAU_TRACE, "[VDPAU] Decoding MPEG12\n");
>
> -   i = 0;
> -
>      /* if surfaces equals VDP_STATUS_INVALID_HANDLE, they are not used */
>      if (picture_info->forward_reference !=  VDP_INVALID_HANDLE) {
> -      ref_frames[i] = ((vlVdpSurface *)vlGetDataHTAB(picture_info->forward_reference))->video_buffer;
> -      if (!ref_frames[i])
> +      picture->ref_forward = ((vlVdpSurface *)vlGetDataHTAB(picture_info->forward_reference))->video_buffer;
> +      if (!picture->ref_forward)
>            return VDP_STATUS_INVALID_HANDLE;
> -      ++i;
>      }
> +   else
> +      picture->ref_forward = NULL;
>
>      if (picture_info->backward_reference !=  VDP_INVALID_HANDLE) {
> -      ref_frames[i] = ((vlVdpSurface *)vlGetDataHTAB(picture_info->backward_reference))->video_buffer;
> -      if (!ref_frames[i])
> +      picture->ref_backward = ((vlVdpSurface *)vlGetDataHTAB(picture_info->backward_reference))->video_buffer;
> +      if (!picture->ref_backward)
>            return VDP_STATUS_INVALID_HANDLE;
> -      ++i;
>      }
> -
> -   decoder->set_reference_frames(decoder, ref_frames, i);
> -
> -   memset(&picture, 0, sizeof(picture));
> -   picture.base.profile = decoder->profile;
> -   picture.picture_coding_type = picture_info->picture_coding_type;
> -   picture.picture_structure = picture_info->picture_structure;
> -   picture.frame_pred_frame_dct = picture_info->frame_pred_frame_dct;
> -   picture.q_scale_type = picture_info->q_scale_type;
> -   picture.alternate_scan = picture_info->alternate_scan;
> -   picture.intra_vlc_format = picture_info->intra_vlc_format;
> -   picture.concealment_motion_vectors = picture_info->concealment_motion_vectors;
> -   picture.intra_dc_precision = picture_info->intra_dc_precision;
> -   picture.f_code[0][0] = picture_info->f_code[0][0] - 1;
> -   picture.f_code[0][1] = picture_info->f_code[0][1] - 1;
> -   picture.f_code[1][0] = picture_info->f_code[1][0] - 1;
> -   picture.f_code[1][1] = picture_info->f_code[1][1] - 1;
> -   picture.num_slices = picture_info->slice_count;
> -   picture.top_field_first = picture_info->top_field_first;
> -   picture.full_pel_forward_vector = picture_info->full_pel_forward_vector;
> -   picture.full_pel_backward_vector = picture_info->full_pel_backward_vector;
> -
> -   decoder->set_picture_parameters(decoder,&picture.base);
> -
> -   memset(&quant, 0, sizeof(quant));
> -   quant.base.codec = PIPE_VIDEO_CODEC_MPEG12;
> -   quant.intra_matrix = picture_info->intra_quantizer_matrix;
> -   quant.non_intra_matrix = picture_info->non_intra_quantizer_matrix;
> -
> -   decoder->set_quant_matrix(decoder,&quant.base);
> +   else
> +      picture->ref_backward = NULL;
> +
> +   picture->picture_coding_type = picture_info->picture_coding_type;
> +   picture->picture_structure = picture_info->picture_structure;
> +   picture->frame_pred_frame_dct = picture_info->frame_pred_frame_dct;
> +   picture->q_scale_type = picture_info->q_scale_type;
> +   picture->alternate_scan = picture_info->alternate_scan;
> +   picture->intra_vlc_format = picture_info->intra_vlc_format;
> +   picture->concealment_motion_vectors = picture_info->concealment_motion_vectors;
> +   picture->intra_dc_precision = picture_info->intra_dc_precision;
> +   picture->f_code[0][0] = picture_info->f_code[0][0] - 1;
> +   picture->f_code[0][1] = picture_info->f_code[0][1] - 1;
> +   picture->f_code[1][0] = picture_info->f_code[1][0] - 1;
> +   picture->f_code[1][1] = picture_info->f_code[1][1] - 1;
> +   picture->num_slices = picture_info->slice_count;
> +   picture->top_field_first = picture_info->top_field_first;
> +   picture->full_pel_forward_vector = picture_info->full_pel_forward_vector;
> +   picture->full_pel_backward_vector = picture_info->full_pel_backward_vector;
> +   picture->intra_matrix = picture_info->intra_quantizer_matrix;
> +   picture->non_intra_matrix = picture_info->non_intra_quantizer_matrix;
>      return VDP_STATUS_OK;
>   }
>
> @@ -264,114 +211,101 @@ vlVdpDecoderRenderMpeg12(struct pipe_video_decoder *decoder,
>    * Decode a mpeg 4 video.
>    */
>   static VdpStatus
> -vlVdpDecoderRenderMpeg4(struct pipe_video_decoder *decoder,
> -                         VdpPictureInfoMPEG4Part2 *picture_info)
> +vlVdpDecoderRenderMpeg4(struct pipe_mpeg4_picture_desc *picture,
> +                        VdpPictureInfoMPEG4Part2 *picture_info)
>   {
> -   struct pipe_mpeg4_picture_desc picture;
> -   struct pipe_mpeg4_quant_matrix quant;
> -   struct pipe_video_buffer *ref_frames[2] = {};
>      unsigned i;
>
>      VDPAU_MSG(VDPAU_TRACE, "[VDPAU] Decoding MPEG4\n");
>
> -   /* if surfaces equals VDP_STATUS_INVALID_HANDLE, they are not used */
> -   if (picture_info->forward_reference !=  VDP_INVALID_HANDLE) {
> -      ref_frames[0] = ((vlVdpSurface *)vlGetDataHTAB(picture_info->forward_reference))->video_buffer;
> -      if (!ref_frames[0])
> +   if (picture_info->forward_reference != VDP_INVALID_HANDLE) {
> +      picture->ref_forward = ((vlVdpSurface *)vlGetDataHTAB(picture_info->forward_reference))->video_buffer;
> +      if (!picture->ref_forward)
>            return VDP_STATUS_INVALID_HANDLE;
>      }
> +   else
> +      picture->ref_forward = NULL;
>
> -   if (picture_info->backward_reference !=  VDP_INVALID_HANDLE) {
> -      ref_frames[1] = ((vlVdpSurface *)vlGetDataHTAB(picture_info->backward_reference))->video_buffer;
> -      if (!ref_frames[1])
> +   if (picture_info->backward_reference != VDP_INVALID_HANDLE) {
> +      picture->ref_backward = ((vlVdpSurface *)vlGetDataHTAB(picture_info->backward_reference))->video_buffer;
> +      if (!picture->ref_backward)
>            return VDP_STATUS_INVALID_HANDLE;
>      }
> -   decoder->set_reference_frames(decoder, ref_frames, 2);
> +   else
> +      picture->ref_backward = NULL;
>
> -   memset(&picture, 0, sizeof(picture));
> -   picture.base.profile = decoder->profile;
>      for (i = 0; i<  2; ++i) {
> -      picture.trd[i] = picture_info->trd[i];
> -      picture.trb[i] = picture_info->trb[i];
> +      picture->trd[i] = picture_info->trd[i];
> +      picture->trb[i] = picture_info->trb[i];
>      }
> -   picture.vop_time_increment_resolution = picture_info->vop_time_increment_resolution;
> -   picture.vop_coding_type = picture_info->vop_coding_type;
> -   picture.vop_fcode_forward = picture_info->vop_fcode_forward;
> -   picture.vop_fcode_backward = picture_info->vop_fcode_backward;
> -   picture.resync_marker_disable = picture_info->resync_marker_disable;
> -   picture.interlaced = picture_info->interlaced;
> -   picture.quant_type = picture_info->quant_type;
> -   picture.quarter_sample = picture_info->quarter_sample;
> -   picture.short_video_header = picture_info->short_video_header;
> -   picture.rounding_control = picture_info->rounding_control;
> -   picture.alternate_vertical_scan_flag = picture_info->alternate_vertical_scan_flag;
> -   picture.top_field_first = picture_info->top_field_first;
> -   decoder->set_picture_parameters(decoder,&picture.base);
> -
> -   memset(&quant, 0, sizeof(quant));
> -   quant.base.codec = PIPE_VIDEO_CODEC_MPEG4;
> -   quant.intra_matrix = picture_info->intra_quantizer_matrix;
> -   quant.non_intra_matrix = picture_info->non_intra_quantizer_matrix;
> -   decoder->set_quant_matrix(decoder,&quant.base);
> +   picture->vop_time_increment_resolution = picture_info->vop_time_increment_resolution;
> +   picture->vop_coding_type = picture_info->vop_coding_type;
> +   picture->vop_fcode_forward = picture_info->vop_fcode_forward;
> +   picture->vop_fcode_backward = picture_info->vop_fcode_backward;
> +   picture->resync_marker_disable = picture_info->resync_marker_disable;
> +   picture->interlaced = picture_info->interlaced;
> +   picture->quant_type = picture_info->quant_type;
> +   picture->quarter_sample = picture_info->quarter_sample;
> +   picture->short_video_header = picture_info->short_video_header;
> +   picture->rounding_control = picture_info->rounding_control;
> +   picture->alternate_vertical_scan_flag = picture_info->alternate_vertical_scan_flag;
> +   picture->top_field_first = picture_info->top_field_first;
> +   picture->intra_matrix = picture_info->intra_quantizer_matrix;
> +   picture->non_intra_matrix = picture_info->non_intra_quantizer_matrix;
>      return VDP_STATUS_OK;
>   }
>
>   static VdpStatus
> -vlVdpDecoderRenderVC1(struct pipe_video_decoder *decoder,
> +vlVdpDecoderRenderVC1(struct pipe_vc1_picture_desc *picture,
>                         VdpPictureInfoVC1 *picture_info)
>   {
> -   struct pipe_vc1_picture_desc picture;
> -   struct pipe_video_buffer *ref_frames[2] = {};
> -   unsigned i;
> -
>      VDPAU_MSG(VDPAU_TRACE, "[VDPAU] Decoding VC-1\n");
>
> -   /* if surfaces equals VDP_STATUS_INVALID_HANDLE, they are not used */
>      if (picture_info->forward_reference !=  VDP_INVALID_HANDLE) {
> -      ref_frames[0] = ((vlVdpSurface *)vlGetDataHTAB(picture_info->forward_reference))->video_buffer;
> -      if (!ref_frames[0])
> +      picture->ref_forward = ((vlVdpSurface *)vlGetDataHTAB(picture_info->forward_reference))->video_buffer;
> +      if (!picture->ref_forward)
>            return VDP_STATUS_INVALID_HANDLE;
>      }
> +   else
> +      picture->ref_forward = NULL;
>
>      if (picture_info->backward_reference !=  VDP_INVALID_HANDLE) {
> -      ref_frames[1] = ((vlVdpSurface *)vlGetDataHTAB(picture_info->backward_reference))->video_buffer;
> -      if (!ref_frames[1])
> +      picture->ref_backward = ((vlVdpSurface *)vlGetDataHTAB(picture_info->backward_reference))->video_buffer;
> +      if (!picture->ref_backward)
>            return VDP_STATUS_INVALID_HANDLE;
>      }
> -   decoder->set_reference_frames(decoder, ref_frames, 2);
> -
> -   memset(&picture, 0, sizeof(picture));
> -   picture.base.profile = decoder->profile;
> -   picture.slice_count = picture_info->slice_count;
> -   picture.picture_type = picture_info->picture_type;
> -   picture.frame_coding_mode = picture_info->frame_coding_mode;
> -   picture.postprocflag = picture_info->postprocflag;
> -   picture.pulldown = picture_info->pulldown;
> -   picture.interlace = picture_info->interlace;
> -   picture.tfcntrflag = picture_info->tfcntrflag;
> -   picture.finterpflag = picture_info->finterpflag;
> -   picture.psf = picture_info->psf;
> -   picture.dquant = picture_info->dquant;
> -   picture.panscan_flag = picture_info->panscan_flag;
> -   picture.refdist_flag = picture_info->refdist_flag;
> -   picture.quantizer = picture_info->quantizer;
> -   picture.extended_mv = picture_info->extended_mv;
> -   picture.extended_dmv = picture_info->extended_dmv;
> -   picture.overlap = picture_info->overlap;
> -   picture.vstransform = picture_info->vstransform;
> -   picture.loopfilter = picture_info->loopfilter;
> -   picture.fastuvmc = picture_info->fastuvmc;
> -   picture.range_mapy_flag = picture_info->range_mapy_flag;
> -   picture.range_mapy = picture_info->range_mapy;
> -   picture.range_mapuv_flag = picture_info->range_mapuv_flag;
> -   picture.range_mapuv = picture_info->range_mapuv;
> -   picture.multires = picture_info->multires;
> -   picture.syncmarker = picture_info->syncmarker;
> -   picture.rangered = picture_info->rangered;
> -   picture.maxbframes = picture_info->maxbframes;
> -   picture.deblockEnable = picture_info->deblockEnable;
> -   picture.pquant = picture_info->pquant;
> -   decoder->set_picture_parameters(decoder,&picture.base);
> +   else
> +      picture->ref_backward = NULL;
> +
> +   picture->slice_count = picture_info->slice_count;
> +   picture->picture_type = picture_info->picture_type;
> +   picture->frame_coding_mode = picture_info->frame_coding_mode;
> +   picture->postprocflag = picture_info->postprocflag;
> +   picture->pulldown = picture_info->pulldown;
> +   picture->interlace = picture_info->interlace;
> +   picture->tfcntrflag = picture_info->tfcntrflag;
> +   picture->finterpflag = picture_info->finterpflag;
> +   picture->psf = picture_info->psf;
> +   picture->dquant = picture_info->dquant;
> +   picture->panscan_flag = picture_info->panscan_flag;
> +   picture->refdist_flag = picture_info->refdist_flag;
> +   picture->quantizer = picture_info->quantizer;
> +   picture->extended_mv = picture_info->extended_mv;
> +   picture->extended_dmv = picture_info->extended_dmv;
> +   picture->overlap = picture_info->overlap;
> +   picture->vstransform = picture_info->vstransform;
> +   picture->loopfilter = picture_info->loopfilter;
> +   picture->fastuvmc = picture_info->fastuvmc;
> +   picture->range_mapy_flag = picture_info->range_mapy_flag;
> +   picture->range_mapy = picture_info->range_mapy;
> +   picture->range_mapuv_flag = picture_info->range_mapuv_flag;
> +   picture->range_mapuv = picture_info->range_mapuv;
> +   picture->multires = picture_info->multires;
> +   picture->syncmarker = picture_info->syncmarker;
> +   picture->rangered = picture_info->rangered;
> +   picture->maxbframes = picture_info->maxbframes;
> +   picture->deblockEnable = picture_info->deblockEnable;
> +   picture->pquant = picture_info->pquant;
>      return VDP_STATUS_OK;
>   }
>
> @@ -390,6 +324,12 @@ vlVdpDecoderRender(VdpDecoder decoder,
>      VdpStatus ret;
>      struct pipe_video_decoder *dec;
>      unsigned i;
> +   union {
> +      struct pipe_picture_desc base;
> +      struct pipe_mpeg12_picture_desc mpeg12;
> +      struct pipe_mpeg4_picture_desc mpeg4;
> +      struct pipe_vc1_picture_desc vc1;
> +   } desc;
>
>      VDPAU_MSG(VDPAU_TRACE, "[VDPAU] Decoding\n");
>
> @@ -412,21 +352,17 @@ vlVdpDecoderRender(VdpDecoder decoder,
>         // TODO: Recreate decoder with correct chroma
>         return VDP_STATUS_INVALID_CHROMA_TYPE;
>
> -   ++vldecoder->cur_buffer;
> -   vldecoder->cur_buffer %= vldecoder->num_buffers;
> -
> -   dec->set_decode_buffer(dec, vldecoder->buffers[vldecoder->cur_buffer]);
> -   dec->set_decode_target(dec, vlsurf->video_buffer);
> -
> +   memset(&desc, 0, sizeof(desc));
> +   desc.base.profile = dec->profile;
>      switch (u_reduce_video_profile(dec->profile)) {
>      case PIPE_VIDEO_CODEC_MPEG12:
> -      ret = vlVdpDecoderRenderMpeg12(dec, (VdpPictureInfoMPEG1Or2 *)picture_info);
> +      ret = vlVdpDecoderRenderMpeg12(&desc.mpeg12, (VdpPictureInfoMPEG1Or2 *)picture_info);
>         break;
>      case PIPE_VIDEO_CODEC_MPEG4:
> -      ret = vlVdpDecoderRenderMpeg4(dec, (VdpPictureInfoMPEG4Part2 *)picture_info);
> +      ret = vlVdpDecoderRenderMpeg4(&desc.mpeg4, (VdpPictureInfoMPEG4Part2 *)picture_info);
>         break;
>      case PIPE_VIDEO_CODEC_VC1:
> -      ret = vlVdpDecoderRenderVC1(dec, (VdpPictureInfoVC1 *)picture_info);
> +      ret = vlVdpDecoderRenderVC1(&desc.vc1, (VdpPictureInfoVC1 *)picture_info);
>         break;
>      default:
>         return VDP_STATUS_INVALID_DECODER_PROFILE;
> @@ -434,10 +370,19 @@ vlVdpDecoderRender(VdpDecoder decoder,
>      if (ret != VDP_STATUS_OK)
>         return ret;
>
> -   dec->begin_frame(dec);
> -   for (i = 0; i<  bitstream_buffer_count; ++i)
> -      dec->decode_bitstream(dec, bitstream_buffers[i].bitstream_bytes,
> -                                           bitstream_buffers[i].bitstream);
> -   dec->end_frame(dec);
> +   if (bitstream_buffer_count) {
> +      void const *data[bitstream_buffer_count];
> +      uint32_t sizes[bitstream_buffer_count];
> +      uint32_t total_size = 0;
> +      for (i = 0; i<  bitstream_buffer_count; ++i) {
> +         data[i] = bitstream_buffers[i].bitstream;
> +         sizes[i] = bitstream_buffers[i].bitstream_bytes;
> +         total_size += sizes[i];
> +      }
> +      dec->decode_bitstream(dec, vlsurf->video_buffer,&desc.base,
> +                            bitstream_buffer_count, total_size,
> +                            sizes, data);
> +   } else
> +      return VDP_STATUS_INVALID_VALUE;
>      return ret;
>   }
> diff --git a/src/gallium/state_trackers/vdpau/vdpau_private.h b/src/gallium/state_trackers/vdpau/vdpau_private.h
> index aae6f78..5f93148 100644
> --- a/src/gallium/state_trackers/vdpau/vdpau_private.h
> +++ b/src/gallium/state_trackers/vdpau/vdpau_private.h
> @@ -327,9 +327,6 @@ typedef struct
>   {
>      vlVdpDevice *device;
>      struct pipe_video_decoder *decoder;
> -   unsigned num_buffers;
> -   void **buffers;
> -   unsigned cur_buffer;
>   } vlVdpDecoder;
>
>   typedef uint32_t vlHandle;
> diff --git a/src/gallium/state_trackers/xorg/xvmc/surface.c b/src/gallium/state_trackers/xorg/xvmc/surface.c
> index e6c5a89..f55691d 100644
> --- a/src/gallium/state_trackers/xorg/xvmc/surface.c
> +++ b/src/gallium/state_trackers/xorg/xvmc/surface.c
> @@ -96,73 +96,6 @@ MacroBlocksToPipe(XvMCContextPrivate *context,
>      }
>   }
>
> -static void
> -SetDecoderStatus(XvMCSurfacePrivate *surface)
> -{
> -   struct pipe_video_decoder *decoder;
> -   struct pipe_video_buffer *ref_frames[2];
> -   struct pipe_mpeg12_picture_desc desc = { { PIPE_VIDEO_PROFILE_MPEG1} };
> -
> -   XvMCContextPrivate *context_priv;
> -
> -   unsigned i, num_refs = 0;
> -
> -   desc.picture_structure = surface->picture_structure;
> -
> -   assert(surface);
> -
> -   context_priv = surface->context->privData;
> -   decoder = context_priv->decoder;
> -
> -   if (surface->decode_buffer)
> -      decoder->set_decode_buffer(decoder, surface->decode_buffer);
> -   decoder->set_decode_target(decoder, surface->video_buffer);
> -
> -   for (i = 0; i<  2; ++i) {
> -      if (surface->ref[i]) {
> -         XvMCSurfacePrivate *ref = surface->ref[i]->privData;
> -
> -         if (ref)
> -            ref_frames[num_refs++] = ref->video_buffer;
> -      }
> -   }
> -   decoder->set_reference_frames(decoder, ref_frames, num_refs);
> -   decoder->set_picture_parameters(context_priv->decoder,&desc.base);
> -}
> -
> -static void
> -RecursiveEndFrame(XvMCSurfacePrivate *surface)
> -{
> -   XvMCContextPrivate *context_priv;
> -   unsigned i;
> -
> -   assert(surface);
> -
> -   context_priv = surface->context->privData;
> -
> -   for ( i = 0; i<  2; ++i ) {
> -      if (surface->ref[i]) {
> -         XvMCSurface *ref = surface->ref[i];
> -
> -         assert(ref);
> -
> -         surface->ref[i] = NULL;
> -         RecursiveEndFrame(ref->privData);
> -         surface->ref[i] = ref;
> -      }
> -   }
> -
> -   if (surface->picture_structure) {
> -      SetDecoderStatus(surface);
> -      surface->picture_structure = 0;
> -
> -      for (i = 0; i<  2; ++i)
> -         surface->ref[i] = NULL;
> -
> -      context_priv->decoder->end_frame(context_priv->decoder);
> -   }
> -}
> -
>   PUBLIC
>   Status XvMCCreateSurface(Display *dpy, XvMCContext *context, XvMCSurface *surface)
>   {
> @@ -186,8 +119,6 @@ Status XvMCCreateSurface(Display *dpy, XvMCContext *context, XvMCSurface *surfac
>      if (!surface_priv)
>         return BadAlloc;
>
> -   if (context_priv->decoder->create_buffer)
> -      surface_priv->decode_buffer = context_priv->decoder->create_buffer(context_priv->decoder);
>      surface_priv->video_buffer = pipe->create_video_buffer
>      (
>         pipe, PIPE_FORMAT_NV12, context_priv->decoder->chroma_format,
> @@ -218,7 +149,7 @@ Status XvMCRenderSurface(Display *dpy, XvMCContext *context, unsigned int pictur
>   )
>   {
>      struct pipe_mpeg12_macroblock mb[num_macroblocks];
> -   struct pipe_video_decoder *decoder;
> +   struct pipe_mpeg12_picture_desc desc = { { PIPE_VIDEO_PROFILE_MPEG1} };
>
>      XvMCContextPrivate *context_priv;
>      XvMCSurfacePrivate *target_surface_priv;
> @@ -257,7 +188,6 @@ Status XvMCRenderSurface(Display *dpy, XvMCContext *context, unsigned int pictur
>      assert(flags == 0 || flags == XVMC_SECOND_FIELD);
>
>      context_priv = context->privData;
> -   decoder = context_priv->decoder;
>
>      target_surface_priv = target_surface->privData;
>      past_surface_priv = past_surface ? past_surface->privData : NULL;
> @@ -268,12 +198,6 @@ Status XvMCRenderSurface(Display *dpy, XvMCContext *context, unsigned int pictur
>      assert(!future_surface || future_surface_priv->context == context);
>
>      // call end frame on all referenced frames
> -   if (past_surface)
> -      RecursiveEndFrame(past_surface->privData);
> -
> -   if (future_surface)
> -      RecursiveEndFrame(future_surface->privData);
> -
>      xvmc_mb = macroblocks->macro_blocks + first_macroblock;
>
>      /* If the surface we're rendering hasn't changed the ref frames shouldn't change. */
> @@ -284,24 +208,24 @@ Status XvMCRenderSurface(Display *dpy, XvMCContext *context, unsigned int pictur
>          (xvmc_mb->x == 0&&  xvmc_mb->y == 0))) {
>
>         // If they change anyway we must assume that the current frame is ended
> -      RecursiveEndFrame(target_surface_priv);
> +      context_priv->decoder->flush(context_priv->decoder);
>      }
>
>      target_surface_priv->ref[0] = past_surface;
>      target_surface_priv->ref[1] = future_surface;
>
> -   if (target_surface_priv->picture_structure)
> -      SetDecoderStatus(target_surface_priv);
> -   else {
> -      target_surface_priv->picture_structure = picture_structure;
> -      SetDecoderStatus(target_surface_priv);
> -      decoder->begin_frame(decoder);
> -   }
> +   target_surface_priv->picture_structure = picture_structure;
> +
> +   desc.picture_structure = picture_structure;
> +   if (past_surface)
> +      desc.ref_forward = ((XvMCSurfacePrivate*)past_surface->privData)->video_buffer;
> +   if (future_surface)
> +      desc.ref_backward = ((XvMCSurfacePrivate*)future_surface->privData)->video_buffer;
>
>      MacroBlocksToPipe(context_priv, target_surface_priv, picture_structure,
>                        xvmc_mb, blocks, mb, num_macroblocks);
>
> -   context_priv->decoder->decode_macroblock(context_priv->decoder,&mb[0].base, num_macroblocks);
> +   context_priv->decoder->decode_macroblock(context_priv->decoder, target_surface_priv->video_buffer,&desc.base,&mb[0].base, num_macroblocks);
>
>      XVMC_MSG(XVMC_TRACE, "[XvMC] Submitted surface %p for rendering.\n", target_surface);
>
> @@ -365,6 +289,7 @@ Status XvMCPutSurface(Display *dpy, XvMCSurface *surface, Drawable drawable,
>      surface_priv = surface->privData;
>      context = surface_priv->context;
>      context_priv = context->privData;
> +   context_priv->decoder->flush(context_priv->decoder);
>
>      assert(flags == XVMC_TOP_FIELD || flags == XVMC_BOTTOM_FIELD || flags == XVMC_FRAME_PICTURE);
>      assert(srcx + srcw - 1<  surface->width);
> @@ -399,10 +324,6 @@ Status XvMCPutSurface(Display *dpy, XvMCSurface *surface, Drawable drawable,
>      assert(desty + desth - 1<  drawable_surface->height);
>       */
>
> -   RecursiveEndFrame(surface_priv);
> -
> -   context_priv->decoder->flush(context_priv->decoder);
> -
>      vl_compositor_clear_layers(compositor);
>      vl_compositor_set_buffer_layer(compositor, 0, surface_priv->video_buffer,&src_rect, NULL);
>
> @@ -499,13 +420,7 @@ Status XvMCDestroySurface(Display *dpy, XvMCSurface *surface)
>
>      surface_priv = surface->privData;
>      context_priv = surface_priv->context->privData;
> -
> -   if (surface_priv->picture_structure) {
> -      SetDecoderStatus(surface_priv);
> -      context_priv->decoder->end_frame(context_priv->decoder);
> -   }
> -   if (surface_priv->decode_buffer)
> -      context_priv->decoder->destroy_buffer(context_priv->decoder, surface_priv->decode_buffer);
> +   context_priv->decoder->flush(context_priv->decoder);
>      surface_priv->video_buffer->destroy(surface_priv->video_buffer);
>      FREE(surface_priv);
>      surface->privData = NULL;
> diff --git a/src/gallium/state_trackers/xorg/xvmc/xvmc_private.h b/src/gallium/state_trackers/xorg/xvmc/xvmc_private.h
> index 305e51f..642baa8 100644
> --- a/src/gallium/state_trackers/xorg/xvmc/xvmc_private.h
> +++ b/src/gallium/state_trackers/xorg/xvmc/xvmc_private.h
> @@ -69,7 +69,6 @@ typedef struct
>
>   typedef struct
>   {
> -   void *decode_buffer;
>      struct pipe_video_buffer *video_buffer;
>
>      /* nonzero if this picture is already being decoded */



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