ref: 9fdfb8e92823abadc54d825d0603a7e9fd344520
dir: /vpx/vp8.h/
/*
* Copyright (c) 2010 The VP8 project authors. All Rights Reserved.
*
* Use of this source code is governed by a BSD-style license
* that can be found in the LICENSE file in the root of the source
* tree. An additional intellectual property rights grant can be found
* in the file PATENTS. All contributing project authors may
* be found in the AUTHORS file in the root of the source tree.
*/
/*!\defgroup vp8 VP8
* \ingroup codecs
* VP8 is vpx's newest video compression algorithm that uses motion
* compensated prediction, Discrete Cosine Transform (DCT) coding of the
* prediction error signal and context dependent entropy coding techniques
* based on arithmatic principles. It features:
* - YUV 4:2:0 image format
* - Macro-block based coding (16x16 luma plus two 8x8 chroma)
* - 1/4 (1/8) pixel accuracy motion compensated prediction
* - 4x4 DCT transform
* - 128 level linear quantizer
* - In loop deblocking filter
* - Context-based entropy coding
*
* @{
*/
/*!\file vp8.h
* \brief Provides controls common to both the VP8 encoder and decoder.
*/
#ifndef VP8_H
#define VP8_H
#include "vpx/vpx_codec_impl_top.h"
/*!\brief Control functions
*
* The set of macros define the control functions of VP8 interface
*/
enum vp8_dec_control_id
{
VP8_SET_REFERENCE = 1, /**< pass in an external frame into decoder to be used as reference frame */
VP8_COPY_REFERENCE = 2, /**< get a copy of reference frame from the decoder */
VP8_SET_POSTPROC = 3, /**< set decoder's the post processing settings */
VP8_COMMON_CTRL_ID_MAX
};
/*!\brief post process flags
*
* The set of macros define VP8 decoder post processing flags
*/
enum vp8_postproc_level
{
VP8_NOFILTERING = 0,
VP8_DEBLOCK = 1,
VP8_DEMACROBLOCK = 2,
VP8_ADDNOISE = 4,
};
/*!\brief post process flags
*
* This define a structure that describe the post processing settings. For
* the best objective measure (using thet PSNR metric) set post_proc_flag
* to VP8_DEBLOCK and deblocking_level to 1.
*/
typedef struct vp8_postproc_cfg
{
int post_proc_flag; /**< the types of post processing to be done, should be combination of "vp8_postproc_level" */
int deblocking_level; /**< the strength of deblocking, valid range [0, 16] */
int noise_level; /**< the strength of additive noise, valid range [0, 16] */
} vp8_postproc_cfg_t;
/*!\brief reference frame type
*
* The set of macros define the type of VP8 reference frames
*/
typedef enum vpx_ref_frame_type
{
VP8_LAST_FRAME = 1,
VP8_GOLD_FRAME = 2,
VP8_ALTR_FRAME = 4
} vpx_ref_frame_type_t;
/*!\brief reference frame data struct
*
* define the data struct to access vp8 reference frames
*/
typedef struct vpx_ref_frame
{
vpx_ref_frame_type_t frame_type; /**< which reference frame */
vpx_image_t img; /**< reference frame data in image format */
} vpx_ref_frame_t;
/*!\brief vp8 decoder control funciton parameter type
*
* defines the data type for each of VP8 decoder control funciton requires
*/
VPX_CTRL_USE_TYPE(VP8_SET_REFERENCE, vpx_ref_frame_t *)
VPX_CTRL_USE_TYPE(VP8_COPY_REFERENCE, vpx_ref_frame_t *)
VPX_CTRL_USE_TYPE(VP8_SET_POSTPROC, vp8_postproc_cfg_t *)
/*! @} - end defgroup vp8 */
#if !defined(VPX_CODEC_DISABLE_COMPAT) || !VPX_CODEC_DISABLE_COMPAT
/* The following definitions are provided for backward compatibility with
* the VP8 1.0.x SDK. USE IN PRODUCTION CODE IS NOT RECOMMENDED.
*/
DECLSPEC_DEPRECATED extern vpx_codec_iface_t vpx_codec_vp8_algo DEPRECATED;
#endif
#include "vpx/vpx_codec_impl_bottom.h"
#endif