Data Structures | Defines | Typedefs | Functions | Variables

libavcodec/vp3.c File Reference

On2 VP3 Video Decoder. More...

#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include "avcodec.h"
#include "dsputil.h"
#include "bitstream.h"
#include "vp3data.h"
#include "xiph.h"

Go to the source code of this file.

Data Structures

struct  Coeff
struct  Vp3Fragment
struct  Vp3DecodeContext

Defines

#define FRAGMENT_PIXELS   8
#define SB_NOT_CODED   0
#define SB_PARTIALLY_CODED   1
#define SB_FULLY_CODED   2
#define MODE_INTER_NO_MV   0
#define MODE_INTRA   1
#define MODE_INTER_PLUS_MV   2
#define MODE_INTER_LAST_MV   3
#define MODE_INTER_PRIOR_LAST   4
#define MODE_USING_GOLDEN   5
#define MODE_GOLDEN_MV   6
#define MODE_INTER_FOURMV   7
#define CODING_MODE_COUNT   8
#define MODE_COPY   8
#define MIN_DEQUANT_VAL   2
#define COMPATIBLE_FRAME(x)   (compatible_frame[s->all_fragments[x].coding_method] == current_frame_type)
#define FRAME_CODED(x)   (s->all_fragments[x].coding_method != MODE_COPY)
#define DC_COEFF(u)   (s->coeffs[u].index ? 0 : s->coeffs[u].coeff)
#define PUL   8
#define PU   4
#define PUR   2
#define PL   1
#define Y_INITIAL(chroma_shift)   s->flipped_image ? 1 : s->fragment_height >> chroma_shift
#define Y_FINISHED(chroma_shift)   s->flipped_image ? y <= s->fragment_height >> chroma_shift : y > 0

Typedefs

typedef struct Coeff Coeff
typedef struct Vp3Fragment Vp3Fragment
typedef struct Vp3DecodeContext Vp3DecodeContext

Functions

static av_cold int vp3_decode_end (AVCodecContext *avctx)
static int init_block_mapping (Vp3DecodeContext *s)
static void init_frame (Vp3DecodeContext *s, GetBitContext *gb)
static void init_dequantizer (Vp3DecodeContext *s)
static void init_loop_filter (Vp3DecodeContext *s)
static int unpack_superblocks (Vp3DecodeContext *s, GetBitContext *gb)
static int unpack_modes (Vp3DecodeContext *s, GetBitContext *gb)
static int unpack_vectors (Vp3DecodeContext *s, GetBitContext *gb)
static int unpack_vlcs (Vp3DecodeContext *s, GetBitContext *gb, VLC *table, int coeff_index, int first_fragment, int last_fragment, int eob_run)
static int unpack_dct_coeffs (Vp3DecodeContext *s, GetBitContext *gb)
static void reverse_dc_prediction (Vp3DecodeContext *s, int first_fragment, int fragment_width, int fragment_height)
static void render_slice (Vp3DecodeContext *s, int slice)
static void apply_loop_filter (Vp3DecodeContext *s)
static void vp3_calculate_pixel_addresses (Vp3DecodeContext *s)
static av_cold int vp3_decode_init (AVCodecContext *avctx)
static int vp3_decode_frame (AVCodecContext *avctx, void *data, int *data_size, const uint8_t *buf, int buf_size)
static int read_huffman_tree (AVCodecContext *avctx, GetBitContext *gb)

Variables

static const int ModeAlphabet [6][CODING_MODE_COUNT]
AVCodec vp3_decoder

Detailed Description

On2 VP3 Video Decoder.

VP3 Video Decoder by Mike Melanson (mike at multimedia.cx) For more information about the VP3 coding process, visit: http://wiki.multimedia.cx/index.php?title=On2_VP3

Theora decoder by Alex Beregszaszi

Definition in file vp3.c.

Define Documentation

#define CODING_MODE_COUNT   8

Definition at line 79 of file vp3.c.

#define COMPATIBLE_FRAME (   x  )     (compatible_frame[s->all_fragments[x].coding_method] == current_frame_type)

Definition at line 1145 of file vp3.c.

Referenced by reverse_dc_prediction().

#define DC_COEFF (   u  )     (s->coeffs[u].index ? 0 : s->coeffs[u].coeff)

Definition at line 1148 of file vp3.c.

Referenced by reverse_dc_prediction().

#define FRAGMENT_PIXELS   8

Definition at line 44 of file vp3.c.

Referenced by render_slice(), and vp3_calculate_pixel_addresses().

#define FRAME_CODED (   x  )     (s->all_fragments[x].coding_method != MODE_COPY)

Definition at line 1147 of file vp3.c.

Referenced by reverse_dc_prediction().

#define MIN_DEQUANT_VAL   2

Definition at line 125 of file vp3.c.

#define MODE_COPY   8

Definition at line 82 of file vp3.c.

Referenced by apply_loop_filter(), render_slice(), reverse_dc_prediction(), unpack_modes(), unpack_superblocks(), and unpack_vectors().

#define MODE_GOLDEN_MV   6

Definition at line 77 of file vp3.c.

Referenced by render_slice(), and unpack_vectors().

#define MODE_INTER_FOURMV   7

Definition at line 78 of file vp3.c.

Referenced by unpack_vectors().

#define MODE_INTER_LAST_MV   3

Definition at line 74 of file vp3.c.

Referenced by unpack_vectors().

#define MODE_INTER_NO_MV   0

Definition at line 71 of file vp3.c.

Referenced by unpack_modes().

#define MODE_INTER_PLUS_MV   2

Definition at line 73 of file vp3.c.

Referenced by unpack_vectors().

#define MODE_INTER_PRIOR_LAST   4

Definition at line 75 of file vp3.c.

Referenced by unpack_vectors().

#define MODE_INTRA   1

Definition at line 72 of file vp3.c.

Referenced by render_slice(), and unpack_modes().

#define MODE_USING_GOLDEN   5

Definition at line 76 of file vp3.c.

Referenced by render_slice().

#define PL   1
#define PU   4
#define PUL   8
#define PUR   2
#define SB_FULLY_CODED   2

Definition at line 69 of file vp3.c.

Referenced by unpack_superblocks().

#define SB_NOT_CODED   0

Definition at line 67 of file vp3.c.

Referenced by unpack_superblocks().

#define SB_PARTIALLY_CODED   1

Definition at line 68 of file vp3.c.

Referenced by unpack_superblocks().

#define Y_FINISHED (   chroma_shift  )     s->flipped_image ? y <= s->fragment_height >> chroma_shift : y > 0

Referenced by vp3_calculate_pixel_addresses().

#define Y_INITIAL (   chroma_shift  )     s->flipped_image ? 1 : s->fragment_height >> chroma_shift

Referenced by vp3_calculate_pixel_addresses().

Typedef Documentation

typedef struct Coeff Coeff
typedef struct Vp3DecodeContext Vp3DecodeContext
typedef struct Vp3Fragment Vp3Fragment

Function Documentation

static void apply_loop_filter ( Vp3DecodeContext *  s  )  [static]

Definition at line 1517 of file vp3.c.

Referenced by vp3_decode_frame().

static int init_block_mapping ( Vp3DecodeContext *  s  )  [static]

Definition at line 248 of file vp3.c.

Referenced by vp3_decode_init().

static void init_dequantizer ( Vp3DecodeContext *  s  )  [static]

Definition at line 484 of file vp3.c.

Referenced by vp3_decode_frame().

static void init_frame ( Vp3DecodeContext *  s,
GetBitContext *  gb 
) [static]

Definition at line 463 of file vp3.c.

Referenced by vp3_decode_frame().

static void init_loop_filter ( Vp3DecodeContext *  s  )  [static]

Definition at line 522 of file vp3.c.

Referenced by vp3_decode_frame().

static int read_huffman_tree ( AVCodecContext *  avctx,
GetBitContext *  gb 
) [static]

Definition at line 2037 of file vp3.c.

static void render_slice ( Vp3DecodeContext *  s,
int  slice 
) [static]

Definition at line 1315 of file vp3.c.

Referenced by vp3_decode_frame().

static void reverse_dc_prediction ( Vp3DecodeContext *  s,
int  first_fragment,
int  fragment_width,
int  fragment_height 
) [static]

Definition at line 1150 of file vp3.c.

Referenced by vp3_decode_frame().

static int unpack_dct_coeffs ( Vp3DecodeContext *  s,
GetBitContext *  gb 
) [static]

Definition at line 1058 of file vp3.c.

Referenced by vp3_decode_frame().

static int unpack_modes ( Vp3DecodeContext *  s,
GetBitContext *  gb 
) [static]

Definition at line 726 of file vp3.c.

Referenced by vp3_decode_frame().

static int unpack_superblocks ( Vp3DecodeContext *  s,
GetBitContext *  gb 
) [static]

Definition at line 545 of file vp3.c.

Referenced by vp3_decode_frame().

static int unpack_vectors ( Vp3DecodeContext *  s,
GetBitContext *  gb 
) [static]

Definition at line 804 of file vp3.c.

Referenced by vp3_decode_frame().

static int unpack_vlcs ( Vp3DecodeContext *  s,
GetBitContext *  gb,
VLC *  table,
int  coeff_index,
int  first_fragment,
int  last_fragment,
int  eob_run 
) [static]

Definition at line 982 of file vp3.c.

Referenced by unpack_dct_coeffs().

static void vp3_calculate_pixel_addresses ( Vp3DecodeContext *  s  )  [static]

Definition at line 1604 of file vp3.c.

Referenced by vp3_decode_frame().

static av_cold int vp3_decode_end ( AVCodecContext *  avctx  )  [static]

Definition at line 1998 of file vp3.c.

Referenced by vp3_decode_init().

static int vp3_decode_frame ( AVCodecContext *  avctx,
void *  data,
int *  data_size,
const uint8_t *  buf,
int  buf_size 
) [static]

Definition at line 1844 of file vp3.c.

static av_cold int vp3_decode_init ( AVCodecContext *  avctx  )  [static]

Definition at line 1650 of file vp3.c.

Variable Documentation

const int ModeAlphabet[6][CODING_MODE_COUNT] [static]

Definition at line 85 of file vp3.c.

Referenced by unpack_modes().

AVCodec vp3_decoder
Initial value:
 {
    "vp3",
    CODEC_TYPE_VIDEO,
    CODEC_ID_VP3,
    sizeof(Vp3DecodeContext),
    vp3_decode_init,
    NULL,
    vp3_decode_end,
    vp3_decode_frame,
    0,
    NULL,
    .long_name = NULL_IF_CONFIG_SMALL("On2 VP3"),
}

Definition at line 2332 of file vp3.c.

Generated on Sat Feb 16 2013 09:23:17 for ffmpeg by  doxygen 1.7.1