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

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.

Referenced by unpack_modes().

#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(), vp3_calculate_pixel_addresses(), and vp3_decode_init().

#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(), and unpack_superblocks().

#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

Referenced by reverse_dc_prediction().

#define PUL 8

Referenced by reverse_dc_prediction().

#define PUR 2

Referenced by reverse_dc_prediction().

#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().

Function Documentation

static void apply_loop_filter ( Vp3DecodeContext * s ) [static]

Definition at line 1517 of file vp3.c.

Referenced by vc1_decode_p_mb(), and 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.

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.


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
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