1/*
2 *  Copyright (c) 2010 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/*!\defgroup vp8 VP8
12 * \ingroup codecs
13 * VP8 is vpx's newest video compression algorithm that uses motion
14 * compensated prediction, Discrete Cosine Transform (DCT) coding of the
15 * prediction error signal and context dependent entropy coding techniques
16 * based on arithmetic principles. It features:
17 *  - YUV 4:2:0 image format
18 *  - Macro-block based coding (16x16 luma plus two 8x8 chroma)
19 *  - 1/4 (1/8) pixel accuracy motion compensated prediction
20 *  - 4x4 DCT transform
21 *  - 128 level linear quantizer
22 *  - In loop deblocking filter
23 *  - Context-based entropy coding
24 *
25 * @{
26 */
27/*!\file
28 * \brief Provides controls common to both the VP8 encoder and decoder.
29 */
30#ifndef VP8_H
31#define VP8_H
32
33#include "./vpx_codec.h"
34#include "./vpx_image.h"
35
36#ifdef __cplusplus
37extern "C" {
38#endif
39
40/*!\brief Control functions
41 *
42 * The set of macros define the control functions of VP8 interface
43 */
44enum vp8_com_control_id {
45  VP8_SET_REFERENCE           = 1,    /**< pass in an external frame into decoder to be used as reference frame */
46  VP8_COPY_REFERENCE          = 2,    /**< get a copy of reference frame from the decoder */
47  VP8_SET_POSTPROC            = 3,    /**< set the decoder's post processing settings  */
48  VP8_SET_DBG_COLOR_REF_FRAME = 4,    /**< set the reference frames to color for each macroblock */
49  VP8_SET_DBG_COLOR_MB_MODES  = 5,    /**< set which macro block modes to color */
50  VP8_SET_DBG_COLOR_B_MODES   = 6,    /**< set which blocks modes to color */
51  VP8_SET_DBG_DISPLAY_MV      = 7,    /**< set which motion vector modes to draw */
52
53  /* TODO(jkoleszar): The encoder incorrectly reuses some of these values (5+)
54   * for its control ids. These should be migrated to something like the
55   * VP8_DECODER_CTRL_ID_START range next time we're ready to break the ABI.
56   */
57  VP9_GET_REFERENCE           = 128,  /**< get a pointer to a reference frame */
58  VP8_COMMON_CTRL_ID_MAX,
59  VP8_DECODER_CTRL_ID_START   = 256
60};
61
62/*!\brief post process flags
63 *
64 * The set of macros define VP8 decoder post processing flags
65 */
66enum vp8_postproc_level {
67  VP8_NOFILTERING             = 0,
68  VP8_DEBLOCK                 = 1 << 0,
69  VP8_DEMACROBLOCK            = 1 << 1,
70  VP8_ADDNOISE                = 1 << 2,
71  VP8_DEBUG_TXT_FRAME_INFO    = 1 << 3, /**< print frame information */
72  VP8_DEBUG_TXT_MBLK_MODES    = 1 << 4, /**< print macro block modes over each macro block */
73  VP8_DEBUG_TXT_DC_DIFF       = 1 << 5, /**< print dc diff for each macro block */
74  VP8_DEBUG_TXT_RATE_INFO     = 1 << 6, /**< print video rate info (encoder only) */
75  VP8_MFQE                    = 1 << 10
76};
77
78/*!\brief post process flags
79 *
80 * This define a structure that describe the post processing settings. For
81 * the best objective measure (using the PSNR metric) set post_proc_flag
82 * to VP8_DEBLOCK and deblocking_level to 1.
83 */
84
85typedef struct vp8_postproc_cfg {
86  int post_proc_flag;         /**< the types of post processing to be done, should be combination of "vp8_postproc_level" */
87  int deblocking_level;       /**< the strength of deblocking, valid range [0, 16] */
88  int noise_level;            /**< the strength of additive noise, valid range [0, 16] */
89} vp8_postproc_cfg_t;
90
91/*!\brief reference frame type
92 *
93 * The set of macros define the type of VP8 reference frames
94 */
95typedef enum vpx_ref_frame_type {
96  VP8_LAST_FRAME = 1,
97  VP8_GOLD_FRAME = 2,
98  VP8_ALTR_FRAME = 4
99} vpx_ref_frame_type_t;
100
101/*!\brief reference frame data struct
102 *
103 * Define the data struct to access vp8 reference frames.
104 */
105typedef struct vpx_ref_frame {
106  vpx_ref_frame_type_t  frame_type;   /**< which reference frame */
107  vpx_image_t           img;          /**< reference frame data in image format */
108} vpx_ref_frame_t;
109
110/*!\brief VP9 specific reference frame data struct
111 *
112 * Define the data struct to access vp9 reference frames.
113 */
114typedef struct vp9_ref_frame {
115  int idx; /**< frame index to get (input) */
116  vpx_image_t  img; /**< img structure to populate (output) */
117} vp9_ref_frame_t;
118
119/*!\brief vp8 decoder control function parameter type
120 *
121 * defines the data type for each of VP8 decoder control function requires
122 */
123VPX_CTRL_USE_TYPE(VP8_SET_REFERENCE,           vpx_ref_frame_t *)
124VPX_CTRL_USE_TYPE(VP8_COPY_REFERENCE,          vpx_ref_frame_t *)
125VPX_CTRL_USE_TYPE(VP8_SET_POSTPROC,            vp8_postproc_cfg_t *)
126VPX_CTRL_USE_TYPE(VP8_SET_DBG_COLOR_REF_FRAME, int)
127VPX_CTRL_USE_TYPE(VP8_SET_DBG_COLOR_MB_MODES,  int)
128VPX_CTRL_USE_TYPE(VP8_SET_DBG_COLOR_B_MODES,   int)
129VPX_CTRL_USE_TYPE(VP8_SET_DBG_DISPLAY_MV,      int)
130VPX_CTRL_USE_TYPE(VP9_GET_REFERENCE,           vp9_ref_frame_t *)
131
132/*! @} - end defgroup vp8 */
133
134#ifdef __cplusplus
135}  // extern "C"
136#endif
137
138#endif
139