2 * Copyright (c) 2010 The WebM project authors. All Rights Reserved.
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.
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
21 * - 128 level linear quantizer
22 * - In loop deblocking filter
23 * - Context-based entropy coding
28 * \brief Provides controls common to both the VP8 encoder and decoder.
33 #include "./vpx_codec.h"
34 #include "./vpx_image.h"
40 /*!\brief Control functions
42 * The set of macros define the control functions of VP8 interface
44 enum vp8_com_control_id {
45 /*!\brief pass in an external frame into decoder to be used as reference frame
47 VP8_SET_REFERENCE = 1,
48 VP8_COPY_REFERENCE = 2, /**< get a copy of reference frame from the decoder */
49 VP8_SET_POSTPROC = 3, /**< set the decoder's post processing settings */
50 VP8_SET_DBG_COLOR_REF_FRAME = 4, /**< \deprecated */
51 VP8_SET_DBG_COLOR_MB_MODES = 5, /**< \deprecated */
52 VP8_SET_DBG_COLOR_B_MODES = 6, /**< \deprecated */
53 VP8_SET_DBG_DISPLAY_MV = 7, /**< \deprecated */
55 /* TODO(jkoleszar): The encoder incorrectly reuses some of these values (5+)
56 * for its control ids. These should be migrated to something like the
57 * VP8_DECODER_CTRL_ID_START range next time we're ready to break the ABI.
59 VP9_GET_REFERENCE = 128, /**< get a pointer to a reference frame */
60 VP8_COMMON_CTRL_ID_MAX,
61 VP8_DECODER_CTRL_ID_START = 256
64 /*!\brief post process flags
66 * The set of macros define VP8 decoder post processing flags
68 enum vp8_postproc_level {
71 VP8_DEMACROBLOCK = 1 << 1,
72 VP8_ADDNOISE = 1 << 2,
73 VP8_DEBUG_TXT_FRAME_INFO = 1 << 3, /**< print frame information */
74 VP8_DEBUG_TXT_MBLK_MODES =
75 1 << 4, /**< print macro block modes over each macro block */
76 VP8_DEBUG_TXT_DC_DIFF = 1 << 5, /**< print dc diff for each macro block */
77 VP8_DEBUG_TXT_RATE_INFO = 1 << 6, /**< print video rate info (encoder only) */
81 /*!\brief post process flags
83 * This define a structure that describe the post processing settings. For
84 * the best objective measure (using the PSNR metric) set post_proc_flag
85 * to VP8_DEBLOCK and deblocking_level to 1.
88 typedef struct vp8_postproc_cfg {
89 /*!\brief the types of post processing to be done, should be combination of
90 * "vp8_postproc_level" */
92 int deblocking_level; /**< the strength of deblocking, valid range [0, 16] */
93 int noise_level; /**< the strength of additive noise, valid range [0, 16] */
96 /*!\brief reference frame type
98 * The set of macros define the type of VP8 reference frames
100 typedef enum vpx_ref_frame_type {
104 } vpx_ref_frame_type_t;
106 /*!\brief reference frame data struct
108 * Define the data struct to access vp8 reference frames.
110 typedef struct vpx_ref_frame {
111 vpx_ref_frame_type_t frame_type; /**< which reference frame */
112 vpx_image_t img; /**< reference frame data in image format */
115 /*!\brief VP9 specific reference frame data struct
117 * Define the data struct to access vp9 reference frames.
119 typedef struct vp9_ref_frame {
120 int idx; /**< frame index to get (input) */
121 vpx_image_t img; /**< img structure to populate (output) */
125 /*!\brief vp8 decoder control function parameter type
127 * defines the data type for each of VP8 decoder control function requires
129 VPX_CTRL_USE_TYPE(VP8_SET_REFERENCE, vpx_ref_frame_t *)
130 #define VPX_CTRL_VP8_SET_REFERENCE
131 VPX_CTRL_USE_TYPE(VP8_COPY_REFERENCE, vpx_ref_frame_t *)
132 #define VPX_CTRL_VP8_COPY_REFERENCE
133 VPX_CTRL_USE_TYPE(VP8_SET_POSTPROC, vp8_postproc_cfg_t *)
134 #define VPX_CTRL_VP8_SET_POSTPROC
135 VPX_CTRL_USE_TYPE_DEPRECATED(VP8_SET_DBG_COLOR_REF_FRAME, int)
136 #define VPX_CTRL_VP8_SET_DBG_COLOR_REF_FRAME
137 VPX_CTRL_USE_TYPE_DEPRECATED(VP8_SET_DBG_COLOR_MB_MODES, int)
138 #define VPX_CTRL_VP8_SET_DBG_COLOR_MB_MODES
139 VPX_CTRL_USE_TYPE_DEPRECATED(VP8_SET_DBG_COLOR_B_MODES, int)
140 #define VPX_CTRL_VP8_SET_DBG_COLOR_B_MODES
141 VPX_CTRL_USE_TYPE_DEPRECATED(VP8_SET_DBG_DISPLAY_MV, int)
142 #define VPX_CTRL_VP8_SET_DBG_DISPLAY_MV
143 VPX_CTRL_USE_TYPE(VP9_GET_REFERENCE, vp9_ref_frame_t *)
144 #define VPX_CTRL_VP9_GET_REFERENCE
147 /*! @} - end defgroup vp8 */