WebM Codec SDK
Modules | Files | Data Structures | Typedefs | Enumerations

Modules

 WebM VP8/VP9 Encoder
 
 WebM VP8/VP9 Decoder
 

Files

file  vp8.h
 Provides controls common to both the VP8 encoder and decoder.
 

Data Structures

struct  vp8_postproc_cfg
 post process flags More...
 
struct  vpx_ref_frame
 reference frame data struct More...
 
struct  vp9_ref_frame
 VP9 specific reference frame data struct. More...
 

Typedefs

typedef struct vp8_postproc_cfg vp8_postproc_cfg_t
 post process flags More...
 
typedef enum vpx_ref_frame_type vpx_ref_frame_type_t
 reference frame type More...
 
typedef struct vpx_ref_frame vpx_ref_frame_t
 reference frame data struct More...
 
typedef struct vp9_ref_frame vp9_ref_frame_t
 VP9 specific reference frame data struct. More...
 

Enumerations

enum  vp8_com_control_id {
  VP8_SET_REFERENCE = 1 , VP8_COPY_REFERENCE = 2 , VP8_SET_POSTPROC = 3 , VP9_GET_REFERENCE = 128 ,
  VP8_COMMON_CTRL_ID_MAX , VP8_DECODER_CTRL_ID_START = 256
}
 Control functions. More...
 
enum  vp8_postproc_level {
  VP8_NOFILTERING = 0 , VP8_DEBLOCK = 1 << 0 , VP8_DEMACROBLOCK = 1 << 1 , VP8_ADDNOISE = 1 << 2 ,
  VP8_MFQE = 1 << 3
}
 post process flags More...
 
enum  vpx_ref_frame_type { VP8_LAST_FRAME = 1 , VP8_GOLD_FRAME = 2 , VP8_ALTR_FRAME = 4 }
 reference frame type More...
 

Detailed Description

VP8 is a 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 arithmetic principles. It features:

Typedef Documentation

◆ vp8_postproc_cfg_t

post process flags

This define a structure that describe the post processing settings. For the best objective measure (using the PSNR metric) set post_proc_flag to VP8_DEBLOCK and deblocking_level to 1.

◆ vpx_ref_frame_type_t

reference frame type

The set of macros define the type of VP8 reference frames

◆ vpx_ref_frame_t

reference frame data struct

Define the data struct to access vp8 reference frames.

◆ vp9_ref_frame_t

VP9 specific reference frame data struct.

Define the data struct to access vp9 reference frames.

Enumeration Type Documentation

◆ vp8_com_control_id

Control functions.

The set of macros define the control functions of VP8 interface

Enumerator
VP8_SET_REFERENCE 

pass in an external frame into decoder to be used as reference frame

VP8_COPY_REFERENCE 

get a copy of reference frame from the decoder

VP8_SET_POSTPROC 

set the decoder's post processing settings

VP9_GET_REFERENCE 

get a pointer to a reference frame

◆ vp8_postproc_level

post process flags

The set of macros define VP8 decoder post processing flags

◆ vpx_ref_frame_type

reference frame type

The set of macros define the type of VP8 reference frames