vp8/decoder/ec_types.h

   1 /*
   2  *  Copyright (c) 2011 The WebM project authors. All Rights Reserved.
   3  *
   4  *  Use of this source code is governed by a BSD-style license
   5  *  that can be found in the LICENSE file in the root of the source
   6  *  tree. An additional intellectual property rights grant can be found
   7  *  in the file PATENTS.  All contributing project authors may
   8  *  be found in the AUTHORS file in the root of the source tree.
   9  */
  10
  11 #ifndef VP8_DECODER_EC_TYPES_H_
  12 #define VP8_DECODER_EC_TYPES_H_
  13
  14 #ifdef __cplusplus
  15 extern "C" {
  16 #endif
  17
  18 #define MAX_OVERLAPS 16
  19
  20
  21 /* The area (pixel area in Q6) the block pointed to by bmi overlaps
  22  * another block with.
  23  */
  24 typedef struct
  25 {
  26     int overlap;
  27     union b_mode_info *bmi;
  28 } OVERLAP_NODE;
  29
  30 /* Structure to keep track of overlapping blocks on a block level. */
  31 typedef struct
  32 {
  33     /* TODO(holmer): This array should be exchanged for a linked list */
  34     OVERLAP_NODE overlaps[MAX_OVERLAPS];
  35 } B_OVERLAP;
  36
  37 /* Structure used to hold all the overlaps of a macroblock. The overlaps of a
  38  * macroblock is further divided into block overlaps.
  39  */
  40 typedef struct
  41 {
  42     B_OVERLAP overlaps[16];
  43 } MB_OVERLAP;
  44
  45 /* Structure for keeping track of motion vectors and which reference frame they
  46  * refer to. Used for motion vector interpolation.
  47  */
  48 typedef struct
  49 {
  50     MV mv;
  51     MV_REFERENCE_FRAME ref_frame;
  52 } EC_BLOCK;
  53
  54 #ifdef __cplusplus
  55 }  // extern "C"
  56 #endif
  57
  58 #endif  // VP8_DECODER_EC_TYPES_H_