Adding upstream version 115.8.0esr.upstream/115.8.0esr

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 552 insertions, 0 deletions

diff --git a/media/libtheora/lib/state.h b/media/libtheora/lib/state.h
new file mode 100644
index 0000000000..f176a53ce9
--- /dev/null
+++ b/media/libtheora/lib/state.h
@@ -0,0 +1,552 @@
+/********************************************************************
+ *                                                                  *
+ * THIS FILE IS PART OF THE OggTheora SOFTWARE CODEC SOURCE CODE.   *
+ * USE, DISTRIBUTION AND REPRODUCTION OF THIS LIBRARY SOURCE IS     *
+ * GOVERNED BY A BSD-STYLE SOURCE LICENSE INCLUDED WITH THIS SOURCE *
+ * IN 'COPYING'. PLEASE READ THESE TERMS BEFORE DISTRIBUTING.       *
+ *                                                                  *
+ * THE Theora SOURCE CODE IS COPYRIGHT (C) 2002-2009                *
+ * by the Xiph.Org Foundation and contributors http://www.xiph.org/ *
+ *                                                                  *
+ ********************************************************************
+
+  function:
+    last mod: $Id: internal.h 17337 2010-07-19 16:08:54Z tterribe $
+
+ ********************************************************************/
+#if !defined(_state_H)
+# define _state_H (1)
+# include "internal.h"
+# include "huffman.h"
+# include "quant.h"
+
+
+
+/*A single quadrant of the map from a super block to fragment numbers.*/
+typedef ptrdiff_t       oc_sb_map_quad[4];
+/*A map from a super block to fragment numbers.*/
+typedef oc_sb_map_quad  oc_sb_map[4];
+/*A single plane of the map from a macro block to fragment numbers.*/
+typedef ptrdiff_t       oc_mb_map_plane[4];
+/*A map from a macro block to fragment numbers.*/
+typedef oc_mb_map_plane oc_mb_map[3];
+/*A motion vector.*/
+typedef ogg_int16_t     oc_mv;
+
+typedef struct oc_sb_flags              oc_sb_flags;
+typedef struct oc_border_info           oc_border_info;
+typedef struct oc_fragment              oc_fragment;
+typedef struct oc_fragment_plane        oc_fragment_plane;
+typedef struct oc_base_opt_vtable       oc_base_opt_vtable;
+typedef struct oc_base_opt_data         oc_base_opt_data;
+typedef struct oc_state_dispatch_vtable oc_state_dispatch_vtable;
+typedef struct oc_theora_state          oc_theora_state;
+
+
+
+/*Shared accelerated functions.*/
+# if defined(OC_X86_ASM)
+#  if defined(_MSC_VER)
+#   include "x86_vc/x86int.h"
+#  else
+#   include "x86/x86int.h"
+#  endif
+# endif
+# if defined(OC_ARM_ASM)
+#  include "arm/armint.h"
+# endif
+# if defined(OC_C64X_ASM)
+#  include "c64x/c64xint.h"
+# endif
+
+# if !defined(oc_state_accel_init)
+#  define oc_state_accel_init oc_state_accel_init_c
+# endif
+# if defined(OC_STATE_USE_VTABLE)
+#  if !defined(oc_frag_copy)
+#   define oc_frag_copy(_state,_dst,_src,_ystride) \
+  ((*(_state)->opt_vtable.frag_copy)(_dst,_src,_ystride))
+#  endif
+#  if !defined(oc_frag_copy_list)
+#   define oc_frag_copy_list(_state,_dst_frame,_src_frame,_ystride, \
+ _fragis,_nfragis,_frag_buf_offs) \
+ ((*(_state)->opt_vtable.frag_copy_list)(_dst_frame,_src_frame,_ystride, \
+  _fragis,_nfragis,_frag_buf_offs))
+#  endif
+#  if !defined(oc_frag_recon_intra)
+#   define oc_frag_recon_intra(_state,_dst,_dst_ystride,_residue) \
+  ((*(_state)->opt_vtable.frag_recon_intra)(_dst,_dst_ystride,_residue))
+#  endif
+#  if !defined(oc_frag_recon_inter)
+#   define oc_frag_recon_inter(_state,_dst,_src,_ystride,_residue) \
+  ((*(_state)->opt_vtable.frag_recon_inter)(_dst,_src,_ystride,_residue))
+#  endif
+#  if !defined(oc_frag_recon_inter2)
+#   define oc_frag_recon_inter2(_state,_dst,_src1,_src2,_ystride,_residue) \
+  ((*(_state)->opt_vtable.frag_recon_inter2)(_dst, \
+   _src1,_src2,_ystride,_residue))
+#  endif
+# if !defined(oc_idct8x8)
+#   define oc_idct8x8(_state,_y,_x,_last_zzi) \
+  ((*(_state)->opt_vtable.idct8x8)(_y,_x,_last_zzi))
+#  endif
+#  if !defined(oc_state_frag_recon)
+#   define oc_state_frag_recon(_state,_fragi, \
+ _pli,_dct_coeffs,_last_zzi,_dc_quant) \
+  ((*(_state)->opt_vtable.state_frag_recon)(_state,_fragi, \
+   _pli,_dct_coeffs,_last_zzi,_dc_quant))
+#  endif
+#  if !defined(oc_loop_filter_init)
+#   define oc_loop_filter_init(_state,_bv,_flimit) \
+  ((*(_state)->opt_vtable.loop_filter_init)(_bv,_flimit))
+#  endif
+#  if !defined(oc_state_loop_filter_frag_rows)
+#   define oc_state_loop_filter_frag_rows(_state, \
+ _bv,_refi,_pli,_fragy0,_fragy_end) \
+  ((*(_state)->opt_vtable.state_loop_filter_frag_rows)(_state, \
+   _bv,_refi,_pli,_fragy0,_fragy_end))
+#  endif
+#  if !defined(oc_restore_fpu)
+#   define oc_restore_fpu(_state) \
+  ((*(_state)->opt_vtable.restore_fpu)())
+#  endif
+# else
+#  if !defined(oc_frag_copy)
+#   define oc_frag_copy(_state,_dst,_src,_ystride) \
+  oc_frag_copy_c(_dst,_src,_ystride)
+#  endif
+#  if !defined(oc_frag_copy_list)
+#   define oc_frag_copy_list(_state,_dst_frame,_src_frame,_ystride, \
+ _fragis,_nfragis,_frag_buf_offs) \
+  oc_frag_copy_list_c(_dst_frame,_src_frame,_ystride, \
+  _fragis,_nfragis,_frag_buf_offs)
+#  endif
+#  if !defined(oc_frag_recon_intra)
+#   define oc_frag_recon_intra(_state,_dst,_dst_ystride,_residue) \
+  oc_frag_recon_intra_c(_dst,_dst_ystride,_residue)
+#  endif
+#  if !defined(oc_frag_recon_inter)
+#   define oc_frag_recon_inter(_state,_dst,_src,_ystride,_residue) \
+  oc_frag_recon_inter_c(_dst,_src,_ystride,_residue)
+#  endif
+#  if !defined(oc_frag_recon_inter2)
+#   define oc_frag_recon_inter2(_state,_dst,_src1,_src2,_ystride,_residue) \
+  oc_frag_recon_inter2_c(_dst,_src1,_src2,_ystride,_residue)
+#  endif
+#  if !defined(oc_idct8x8)
+#   define oc_idct8x8(_state,_y,_x,_last_zzi) oc_idct8x8_c(_y,_x,_last_zzi)
+#  endif
+#  if !defined(oc_state_frag_recon)
+#   define oc_state_frag_recon oc_state_frag_recon_c
+#  endif
+#  if !defined(oc_loop_filter_init)
+#   define oc_loop_filter_init(_state,_bv,_flimit) \
+  oc_loop_filter_init_c(_bv,_flimit)
+#  endif
+#  if !defined(oc_state_loop_filter_frag_rows)
+#   define oc_state_loop_filter_frag_rows oc_state_loop_filter_frag_rows_c
+#  endif
+#  if !defined(oc_restore_fpu)
+#   define oc_restore_fpu(_state) do{}while(0)
+#  endif
+# endif
+
+
+
+/*A keyframe.*/
+# define OC_INTRA_FRAME (0)
+/*A predicted frame.*/
+# define OC_INTER_FRAME (1)
+/*A frame of unknown type (frame type decision has not yet been made).*/
+# define OC_UNKWN_FRAME (-1)
+
+/*The amount of padding to add to the reconstructed frame buffers on all
+   sides.
+  This is used to allow unrestricted motion vectors without special casing.
+  This must be a multiple of 2.*/
+# define OC_UMV_PADDING (16)
+
+/*Frame classification indices.*/
+/*The previous golden frame.*/
+# define OC_FRAME_GOLD      (0)
+/*The previous frame.*/
+# define OC_FRAME_PREV      (1)
+/*The current frame.*/
+# define OC_FRAME_SELF      (2)
+/*Used to mark uncoded fragments (for DC prediction).*/
+# define OC_FRAME_NONE      (3)
+
+/*The input or output buffer.*/
+# define OC_FRAME_IO        (3)
+/*Uncompressed prev golden frame.*/
+# define OC_FRAME_GOLD_ORIG (4)
+/*Uncompressed previous frame. */
+# define OC_FRAME_PREV_ORIG (5)
+
+/*Macroblock modes.*/
+/*Macro block is invalid: It is never coded.*/
+# define OC_MODE_INVALID        (-1)
+/*Encoded difference from the same macro block in the previous frame.*/
+# define OC_MODE_INTER_NOMV     (0)
+/*Encoded with no motion compensated prediction.*/
+# define OC_MODE_INTRA          (1)
+/*Encoded difference from the previous frame offset by the given motion
+   vector.*/
+# define OC_MODE_INTER_MV       (2)
+/*Encoded difference from the previous frame offset by the last coded motion
+   vector.*/
+# define OC_MODE_INTER_MV_LAST  (3)
+/*Encoded difference from the previous frame offset by the second to last
+   coded motion vector.*/
+# define OC_MODE_INTER_MV_LAST2 (4)
+/*Encoded difference from the same macro block in the previous golden
+   frame.*/
+# define OC_MODE_GOLDEN_NOMV    (5)
+/*Encoded difference from the previous golden frame offset by the given motion
+   vector.*/
+# define OC_MODE_GOLDEN_MV      (6)
+/*Encoded difference from the previous frame offset by the individual motion
+   vectors given for each block.*/
+# define OC_MODE_INTER_MV_FOUR  (7)
+/*The number of (coded) modes.*/
+# define OC_NMODES              (8)
+
+/*Determines the reference frame used for a given MB mode.*/
+# define OC_FRAME_FOR_MODE(_x) \
+ OC_UNIBBLE_TABLE32(OC_FRAME_PREV,OC_FRAME_SELF,OC_FRAME_PREV,OC_FRAME_PREV, \
+  OC_FRAME_PREV,OC_FRAME_GOLD,OC_FRAME_GOLD,OC_FRAME_PREV,(_x))
+
+/*Constants for the packet state machine common between encoder and decoder.*/
+
+/*Next packet to emit/read: Codec info header.*/
+# define OC_PACKET_INFO_HDR    (-3)
+/*Next packet to emit/read: Comment header.*/
+# define OC_PACKET_COMMENT_HDR (-2)
+/*Next packet to emit/read: Codec setup header.*/
+# define OC_PACKET_SETUP_HDR   (-1)
+/*No more packets to emit/read.*/
+# define OC_PACKET_DONE        (INT_MAX)
+
+
+
+#define OC_MV(_x,_y)         ((oc_mv)((_x)&0xFF|(_y)<<8))
+#define OC_MV_X(_mv)         ((signed char)(_mv))
+#define OC_MV_Y(_mv)         ((_mv)>>8)
+#define OC_MV_ADD(_mv1,_mv2) \
+  OC_MV(OC_MV_X(_mv1)+OC_MV_X(_mv2), \
+   OC_MV_Y(_mv1)+OC_MV_Y(_mv2))
+#define OC_MV_SUB(_mv1,_mv2) \
+  OC_MV(OC_MV_X(_mv1)-OC_MV_X(_mv2), \
+   OC_MV_Y(_mv1)-OC_MV_Y(_mv2))
+
+
+
+/*Super blocks are 32x32 segments of pixels in a single color plane indexed
+   in image order.
+  Internally, super blocks are broken up into four quadrants, each of which
+   contains a 2x2 pattern of blocks, each of which is an 8x8 block of pixels.
+  Quadrants, and the blocks within them, are indexed in a special order called
+   a "Hilbert curve" within the super block.
+
+  In order to differentiate between the Hilbert-curve indexing strategy and
+   the regular image order indexing strategy, blocks indexed in image order
+   are called "fragments".
+  Fragments are indexed in image order, left to right, then bottom to top,
+   from Y' plane to Cb plane to Cr plane.
+
+  The co-located fragments in all image planes corresponding to the location
+   of a single quadrant of a luma plane super block form a macro block.
+  Thus there is only a single set of macro blocks for all planes, each of which
+   contains between 6 and 12 fragments, depending on the pixel format.
+  Therefore macro block information is kept in a separate set of arrays from
+   super blocks to avoid unused space in the other planes.
+  The lists are indexed in super block order.
+  That is, the macro block corresponding to the macro block mbi in (luma plane)
+   super block sbi is at index (sbi<<2|mbi).
+  Thus the number of macro blocks in each dimension is always twice the number
+   of super blocks, even when only an odd number fall inside the coded frame.
+  These "extra" macro blocks are just an artifact of our internal data layout,
+   and not part of the coded stream; they are flagged with a negative MB mode.*/
+
+
+
+/*Super block information.*/
+struct oc_sb_flags{
+  unsigned char coded_fully:1;
+  unsigned char coded_partially:1;
+  unsigned char quad_valid:4;
+};
+
+
+
+/*Information about a fragment which intersects the border of the displayable
+   region.
+  This marks which pixels belong to the displayable region.*/
+struct oc_border_info{
+  /*A bit mask marking which pixels are in the displayable region.
+    Pixel (x,y) corresponds to bit (y<<3|x).*/
+  ogg_int64_t mask;
+  /*The number of pixels in the displayable region.
+    This is always positive, and always less than 64.*/
+  int         npixels;
+};
+
+
+
+/*Fragment information.*/
+struct oc_fragment{
+  /*A flag indicating whether or not this fragment is coded.*/
+  unsigned   coded:1;
+  /*A flag indicating that this entire fragment lies outside the displayable
+     region of the frame.
+    Note the contrast with an invalid macro block, which is outside the coded
+     frame, not just the displayable one.
+    There are no fragments outside the coded frame by construction.*/
+  unsigned   invalid:1;
+  /*The index of the quality index used for this fragment's AC coefficients.*/
+  unsigned   qii:4;
+  /*The index of the reference frame this fragment is predicted from.*/
+  unsigned   refi:2;
+  /*The mode of the macroblock this fragment belongs to.*/
+  unsigned   mb_mode:3;
+  /*The index of the associated border information for fragments which lie
+     partially outside the displayable region.
+    For fragments completely inside or outside this region, this is -1.
+    Note that the C standard requires an explicit signed keyword for bitfield
+     types, since some compilers may treat them as unsigned without it.*/
+  signed int borderi:5;
+  /*The prediction-corrected DC component.
+    Note that the C standard requires an explicit signed keyword for bitfield
+     types, since some compilers may treat them as unsigned without it.*/
+  signed int dc:16;
+};
+
+
+
+/*A description of each fragment plane.*/
+struct oc_fragment_plane{
+  /*The number of fragments in the horizontal direction.*/
+  int       nhfrags;
+  /*The number of fragments in the vertical direction.*/
+  int       nvfrags;
+  /*The offset of the first fragment in the plane.*/
+  ptrdiff_t froffset;
+  /*The total number of fragments in the plane.*/
+  ptrdiff_t nfrags;
+  /*The number of super blocks in the horizontal direction.*/
+  unsigned  nhsbs;
+  /*The number of super blocks in the vertical direction.*/
+  unsigned  nvsbs;
+  /*The offset of the first super block in the plane.*/
+  unsigned  sboffset;
+  /*The total number of super blocks in the plane.*/
+  unsigned  nsbs;
+};
+
+
+typedef void (*oc_state_loop_filter_frag_rows_func)(
+ const oc_theora_state *_state,signed char _bv[256],int _refi,int _pli,
+ int _fragy0,int _fragy_end);
+
+/*The shared (encoder and decoder) functions that have accelerated variants.*/
+struct oc_base_opt_vtable{
+  void (*frag_copy)(unsigned char *_dst,
+   const unsigned char *_src,int _ystride);
+  void (*frag_copy_list)(unsigned char *_dst_frame,
+   const unsigned char *_src_frame,int _ystride,
+   const ptrdiff_t *_fragis,ptrdiff_t _nfragis,const ptrdiff_t *_frag_buf_offs);
+  void (*frag_recon_intra)(unsigned char *_dst,int _ystride,
+   const ogg_int16_t _residue[64]);
+  void (*frag_recon_inter)(unsigned char *_dst,
+   const unsigned char *_src,int _ystride,const ogg_int16_t _residue[64]);
+  void (*frag_recon_inter2)(unsigned char *_dst,const unsigned char *_src1,
+   const unsigned char *_src2,int _ystride,const ogg_int16_t _residue[64]);
+  void (*idct8x8)(ogg_int16_t _y[64],ogg_int16_t _x[64],int _last_zzi);
+  void (*state_frag_recon)(const oc_theora_state *_state,ptrdiff_t _fragi,
+   int _pli,ogg_int16_t _dct_coeffs[128],int _last_zzi,ogg_uint16_t _dc_quant);
+  void (*loop_filter_init)(signed char _bv[256],int _flimit);
+  oc_state_loop_filter_frag_rows_func state_loop_filter_frag_rows;
+  void (*restore_fpu)(void);
+};
+
+/*The shared (encoder and decoder) tables that vary according to which variants
+   of the above functions are used.*/
+struct oc_base_opt_data{
+  const unsigned char *dct_fzig_zag;
+};
+
+
+/*State information common to both the encoder and decoder.*/
+struct oc_theora_state{
+  /*The stream information.*/
+  th_info             info;
+# if defined(OC_STATE_USE_VTABLE)
+  /*Table for shared accelerated functions.*/
+  oc_base_opt_vtable  opt_vtable;
+# endif
+  /*Table for shared data used by accelerated functions.*/
+  oc_base_opt_data    opt_data;
+  /*CPU flags to detect the presence of extended instruction sets.*/
+  ogg_uint32_t        cpu_flags;
+  /*The fragment plane descriptions.*/
+  oc_fragment_plane   fplanes[3];
+  /*The list of fragments, indexed in image order.*/
+  oc_fragment        *frags;
+  /*The the offset into the reference frame buffer to the upper-left pixel of
+     each fragment.*/
+  ptrdiff_t          *frag_buf_offs;
+  /*The motion vector for each fragment.*/
+  oc_mv              *frag_mvs;
+  /*The total number of fragments in a single frame.*/
+  ptrdiff_t           nfrags;
+  /*The list of super block maps, indexed in image order.*/
+  oc_sb_map          *sb_maps;
+  /*The list of super block flags, indexed in image order.*/
+  oc_sb_flags        *sb_flags;
+  /*The total number of super blocks in a single frame.*/
+  unsigned            nsbs;
+  /*The fragments from each color plane that belong to each macro block.
+    Fragments are stored in image order (left to right then top to bottom).
+    When chroma components are decimated, the extra fragments have an index of
+     -1.*/
+  oc_mb_map          *mb_maps;
+  /*The list of macro block modes.
+    A negative number indicates the macro block lies entirely outside the
+     coded frame.*/
+  signed char        *mb_modes;
+  /*The number of macro blocks in the X direction.*/
+  unsigned            nhmbs;
+  /*The number of macro blocks in the Y direction.*/
+  unsigned            nvmbs;
+  /*The total number of macro blocks.*/
+  size_t              nmbs;
+  /*The list of coded fragments, in coded order.
+    Uncoded fragments are stored in reverse order from the end of the list.*/
+  ptrdiff_t          *coded_fragis;
+  /*The number of coded fragments in each plane.*/
+  ptrdiff_t           ncoded_fragis[3];
+  /*The total number of coded fragments.*/
+  ptrdiff_t           ntotal_coded_fragis;
+  /*The actual buffers used for the reference frames.*/
+  th_ycbcr_buffer     ref_frame_bufs[6];
+  /*The index of the buffers being used for each OC_FRAME_* reference frame.*/
+  int                 ref_frame_idx[6];
+  /*The storage for the reference frame buffers.
+    This is just ref_frame_bufs[ref_frame_idx[i]][0].data, but is cached here
+     for faster look-up.*/
+  unsigned char      *ref_frame_data[6];
+  /*The handle used to allocate the reference frame buffers.*/
+  unsigned char      *ref_frame_handle;
+  /*The strides for each plane in the reference frames.*/
+  int                 ref_ystride[3];
+  /*The number of unique border patterns.*/
+  int                 nborders;
+  /*The unique border patterns for all border fragments.
+    The borderi field of fragments which straddle the border indexes this
+     list.*/
+  oc_border_info      borders[16];
+  /*The frame number of the last keyframe.*/
+  ogg_int64_t         keyframe_num;
+  /*The frame number of the current frame.*/
+  ogg_int64_t         curframe_num;
+  /*The granpos of the current frame.*/
+  ogg_int64_t         granpos;
+  /*The type of the current frame.*/
+  signed char         frame_type;
+  /*The bias to add to the frame count when computing granule positions.*/
+  unsigned char       granpos_bias;
+  /*The number of quality indices used in the current frame.*/
+  unsigned char       nqis;
+  /*The quality indices of the current frame.*/
+  unsigned char       qis[3];
+  /*The dequantization tables, stored in zig-zag order, and indexed by
+     qi, pli, qti, and zzi.*/
+  ogg_uint16_t       *dequant_tables[64][3][2];
+  OC_ALIGN16(oc_quant_table      dequant_table_data[64][3][2]);
+  /*Loop filter strength parameters.*/
+  unsigned char       loop_filter_limits[64];
+};
+
+
+
+/*The function type used to fill in the chroma plane motion vectors for a
+   macro block when 4 different motion vectors are specified in the luma
+   plane.
+  _cbmvs: The chroma block-level motion vectors to fill in.
+  _lmbmv: The luma macro-block level motion vector to fill in for use in
+           prediction.
+  _lbmvs: The luma block-level motion vectors.*/
+typedef void (*oc_set_chroma_mvs_func)(oc_mv _cbmvs[4],const oc_mv _lbmvs[4]);
+
+
+
+/*A table of functions used to fill in the Cb,Cr plane motion vectors for a
+   macro block when 4 different motion vectors are specified in the luma
+   plane.*/
+extern const oc_set_chroma_mvs_func OC_SET_CHROMA_MVS_TABLE[TH_PF_NFORMATS];
+
+
+
+int oc_state_init(oc_theora_state *_state,const th_info *_info,int _nrefs);
+void oc_state_clear(oc_theora_state *_state);
+void oc_state_accel_init_c(oc_theora_state *_state);
+void oc_state_borders_fill_rows(oc_theora_state *_state,int _refi,int _pli,
+ int _y0,int _yend);
+void oc_state_borders_fill_caps(oc_theora_state *_state,int _refi,int _pli);
+void oc_state_borders_fill(oc_theora_state *_state,int _refi);
+void oc_state_fill_buffer_ptrs(oc_theora_state *_state,int _buf_idx,
+ th_ycbcr_buffer _img);
+int oc_state_mbi_for_pos(oc_theora_state *_state,int _mbx,int _mby);
+int oc_state_get_mv_offsets(const oc_theora_state *_state,int _offsets[2],
+ int _pli,oc_mv _mv);
+
+void oc_loop_filter_init_c(signed char _bv[256],int _flimit);
+void oc_state_loop_filter(oc_theora_state *_state,int _frame);
+# if defined(OC_DUMP_IMAGES)
+int oc_state_dump_frame(const oc_theora_state *_state,int _frame,
+ const char *_suf);
+# endif
+
+/*Default pure-C implementations of shared accelerated functions.*/
+void oc_frag_copy_c(unsigned char *_dst,
+ const unsigned char *_src,int _src_ystride);
+void oc_frag_copy_list_c(unsigned char *_dst_frame,
+ const unsigned char *_src_frame,int _ystride,
+ const ptrdiff_t *_fragis,ptrdiff_t _nfragis,const ptrdiff_t *_frag_buf_offs);
+void oc_frag_recon_intra_c(unsigned char *_dst,int _dst_ystride,
+ const ogg_int16_t _residue[64]);
+void oc_frag_recon_inter_c(unsigned char *_dst,
+ const unsigned char *_src,int _ystride,const ogg_int16_t _residue[64]);
+void oc_frag_recon_inter2_c(unsigned char *_dst,const unsigned char *_src1,
+ const unsigned char *_src2,int _ystride,const ogg_int16_t _residue[64]);
+void oc_idct8x8_c(ogg_int16_t _y[64],ogg_int16_t _x[64],int _last_zzi);
+void oc_state_frag_recon_c(const oc_theora_state *_state,ptrdiff_t _fragi,
+ int _pli,ogg_int16_t _dct_coeffs[128],int _last_zzi,ogg_uint16_t _dc_quant);
+void oc_state_loop_filter_frag_rows_c(const oc_theora_state *_state,
+ signed char _bv[256],int _refi,int _pli,int _fragy0,int _fragy_end);
+void oc_restore_fpu_c(void);
+
+/*We need a way to call a few encoder functions without introducing a link-time
+   dependency into the decoder, while still allowing the old alpha API which
+   does not distinguish between encoder and decoder objects to be used.
+  We do this by placing a function table at the start of the encoder object
+   which can dispatch into the encoder library.
+  We do a similar thing for the decoder in case we ever decide to split off a
+   common base library.*/
+typedef void (*oc_state_clear_func)(theora_state *_th);
+typedef int (*oc_state_control_func)(theora_state *th,int _req,
+ void *_buf,size_t _buf_sz);
+typedef ogg_int64_t (*oc_state_granule_frame_func)(theora_state *_th,
+ ogg_int64_t _granulepos);
+typedef double (*oc_state_granule_time_func)(theora_state *_th,
+ ogg_int64_t _granulepos);
+
+
+struct oc_state_dispatch_vtable{
+  oc_state_clear_func         clear;
+  oc_state_control_func       control;
+  oc_state_granule_frame_func granule_frame;
+  oc_state_granule_time_func  granule_time;
+};
+
+#endif