WebM VP8 Codec SDK
Modules | Files | Data Structures | Typedefs | Enumerations

Modules

 WebM VP8 Encoder
 
 WebM VP8 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...
 

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...
 

Enumerations

enum  vp8_com_control_id {
  VP8_SET_REFERENCE = 1, VP8_COPY_REFERENCE = 2, VP8_SET_POSTPROC = 3, VP8_SET_DBG_COLOR_REF_FRAME = 4,
  VP8_SET_DBG_COLOR_MB_MODES = 5, VP8_SET_DBG_COLOR_B_MODES = 6, VP8_SET_DBG_DISPLAY_MV = 7, 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_DEBUG_TXT_FRAME_INFO = 1<<3, VP8_DEBUG_TXT_MBLK_MODES = 1<<4, VP8_DEBUG_TXT_DC_DIFF = 1<<5, VP8_DEBUG_TXT_RATE_INFO = 1<<6,
  VP8_MFQE = 1<<10
}
 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 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 arithmetic principles. It features:

Typedef Documentation

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.

reference frame type

The set of macros define the type of VP8 reference frames

reference frame data struct

define the data struct to access vp8 reference frames

Enumeration Type Documentation

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

VP8_SET_DBG_COLOR_REF_FRAME 

set the reference frames to color for each macroblock

VP8_SET_DBG_COLOR_MB_MODES 

set which macro block modes to color

VP8_SET_DBG_COLOR_B_MODES 

set which blocks modes to color

VP8_SET_DBG_DISPLAY_MV 

set which motion vector modes to draw

post process flags

The set of macros define VP8 decoder post processing flags

Enumerator
VP8_DEBUG_TXT_FRAME_INFO 

print frame information

VP8_DEBUG_TXT_MBLK_MODES 

print macro block modes over each macro block

VP8_DEBUG_TXT_DC_DIFF 

print dc diff for each macro block

VP8_DEBUG_TXT_RATE_INFO 

print video rate info (encoder only)

reference frame type

The set of macros define the type of VP8 reference frames