libavcodec/vp6.c File Reference

VP6 compatible video decoder. More...

#include <stdlib.h>
#include "avcodec.h"
#include "dsputil.h"
#include "get_bits.h"
#include "huffman.h"
#include "vp56.h"
#include "vp56data.h"
#include "vp6data.h"

Go to the source code of this file.

Defines
#define	VP6_MAX_HUFF_SIZE   12
Functions
static void	vp6_parse_coeff (VP56Context *s)
static void	vp6_parse_coeff_huffman (VP56Context *s)
static int	vp6_parse_header (VP56Context *s, const uint8_t *buf, int buf_size)
static void	vp6_coeff_order_table_init (VP56Context *s)
static void	vp6_default_models_init (VP56Context *s)
static void	vp6_parse_vector_models (VP56Context *s)
static int	vp6_huff_cmp (const void *va, const void *vb)
static int	vp6_build_huff_tree (VP56Context *s, uint8_t coeff_model[], const uint8_t *map, unsigned size, VLC *vlc)
static int	vp6_parse_coeff_models (VP56Context *s)
static void	vp6_parse_vector_adjustment (VP56Context *s, VP56mv *vect)
static unsigned	vp6_get_nb_null (VP56Context *s)
	Read number of consecutive blocks with null DC or AC.
static int	vp6_block_variance (uint8_t *src, int stride)
static void	vp6_filter_hv4 (uint8_t *dst, uint8_t *src, int stride, int delta, const int16_t *weights)
static void	vp6_filter_diag2 (VP56Context *s, uint8_t *dst, uint8_t *src, int stride, int h_weight, int v_weight)
static void	vp6_filter (VP56Context *s, uint8_t *dst, uint8_t *src, int offset1, int offset2, int stride, VP56mv mv, int mask, int select, int luma)
static av_cold void	vp6_decode_init_context (VP56Context *s)
static av_cold int	vp6_decode_init (AVCodecContext *avctx)
static av_cold void	vp6_decode_free_context (VP56Context *s)
static av_cold int	vp6_decode_free (AVCodecContext *avctx)
Variables
AVCodec	ff_vp6_decoder
AVCodec	ff_vp6f_decoder
AVCodec	ff_vp6a_decoder

---

Detailed Description

VP6 compatible video decoder.

The VP6F decoder accepts an optional 1 byte extradata. It is composed of:

• upper 4 bits: difference between encoded width and visible width
• lower 4 bits: difference between encoded height and visible height

Definition in file vp6.c.

---

Define Documentation

#define VP6_MAX_HUFF_SIZE   12

Definition at line 41 of file vp6.c.

Referenced by vp6_build_huff_tree().

---

Function Documentation

static int vp6_block_variance	(	uint8_t *	src,
		int	stride
	)			[static]

Definition at line 503 of file vp6.c.

Referenced by vp6_filter().

static int vp6_build_huff_tree	(	VP56Context *	s,
		uint8_t	coeff_model[],
		const uint8_t *	map,
		unsigned	size,
		VLC *	vlc
	)			[static]

Definition at line 225 of file vp6.c.

Referenced by vp6_parse_coeff_models().

static void vp6_coeff_order_table_init

(

VP56Context *

s

)

[static]

Definition at line 165 of file vp6.c.

Referenced by vp6_default_models_init(), and vp6_parse_coeff_models().

static av_cold int vp6_decode_free

(

AVCodecContext *

avctx

)

[static]

Definition at line 631 of file vp6.c.

static av_cold void vp6_decode_free_context

(

VP56Context *

s

)

[static]

Definition at line 647 of file vp6.c.

Referenced by vp6_decode_free().

static av_cold int vp6_decode_init

(

AVCodecContext *

avctx

)

[static]

Definition at line 595 of file vp6.c.

static av_cold void vp6_decode_init_context

(

VP56Context *

s

)

[static]

Definition at line 617 of file vp6.c.

Referenced by vp6_decode_init().

static void vp6_default_models_init

(

VP56Context *

s

)

[static]

Definition at line 176 of file vp6.c.

Referenced by vp6_decode_init_context().

static void vp6_filter	(	VP56Context *	s,
		uint8_t *	dst,
		uint8_t *	src,
		int	offset1,
		int	offset2,
		int	stride,
		VP56mv	mv,
		int	mask,
		int	select,
		int	luma
	)			[static]

Definition at line 543 of file vp6.c.

Referenced by vp6_decode_init_context().

static void vp6_filter_diag2	(	VP56Context *	s,
		uint8_t *	dst,
		uint8_t *	src,
		int	stride,
		int	h_weight,
		int	v_weight
	)			[static]

Definition at line 535 of file vp6.c.

Referenced by vp6_filter().

static void vp6_filter_hv4	(	uint8_t *	dst,
		uint8_t *	src,
		int	stride,
		int	delta,
		const int16_t *	weights
	)			[static]

Definition at line 518 of file vp6.c.

Referenced by vp6_filter().

static unsigned vp6_get_nb_null

(

VP56Context *

s

)

[static]

Read number of consecutive blocks with null DC or AC.

This value is < 74.

Definition at line 357 of file vp6.c.

Referenced by vp6_parse_coeff_huffman().

static int vp6_huff_cmp	(	const void *	va,
		const void *	vb
	)			[static]

Definition at line 219 of file vp6.c.

Referenced by vp6_build_huff_tree().

static void vp6_parse_coeff

(

VP56Context *

s

)

[static]

Definition at line 428 of file vp6.c.

Referenced by vp6_parse_header().

static void vp6_parse_coeff_huffman

(

VP56Context *

s

)

[static]

Definition at line 369 of file vp6.c.

Referenced by vp6_parse_header().

static int vp6_parse_coeff_models

(

VP56Context *

s

)

[static]

Definition at line 246 of file vp6.c.

Referenced by vp6_decode_init_context().

static int vp6_parse_header	(	VP56Context *	s,
		const uint8_t *	buf,
		int	buf_size
	)			[static]

Definition at line 46 of file vp6.c.

Referenced by vp6_decode_init_context().

static void vp6_parse_vector_adjustment	(	VP56Context *	s,
		VP56mv *	vect
	)			[static]

Definition at line 315 of file vp6.c.

Referenced by vp6_decode_init_context().

static void vp6_parse_vector_models

(

VP56Context *

s

)

[static]

Definition at line 194 of file vp6.c.

Referenced by vp6_decode_init_context().

---

Variable Documentation

AVCodec ff_vp6_decoder

Initial value:

 {
    .name           = "vp6",
    .type           = AVMEDIA_TYPE_VIDEO,
    .id             = AV_CODEC_ID_VP6,
    .priv_data_size = sizeof(VP56Context),
    .init           = vp6_decode_init,
    .close          = vp6_decode_free,
    .decode         = ff_vp56_decode_frame,
    .capabilities   = CODEC_CAP_DR1,
    .long_name      = NULL_IF_CONFIG_SMALL("On2 VP6"),
}

Definition at line 660 of file vp6.c.

AVCodec ff_vp6a_decoder

Initial value:

 {
    .name           = "vp6a",
    .type           = AVMEDIA_TYPE_VIDEO,
    .id             = AV_CODEC_ID_VP6A,
    .priv_data_size = sizeof(VP56Context),
    .init           = vp6_decode_init,
    .close          = vp6_decode_free,
    .decode         = ff_vp56_decode_frame,
    .capabilities   = CODEC_CAP_DR1 | CODEC_CAP_SLICE_THREADS,
    .long_name      = NULL_IF_CONFIG_SMALL("On2 VP6 (Flash version, with alpha channel)"),
}

Definition at line 686 of file vp6.c.

AVCodec ff_vp6f_decoder

Initial value:

 {
    .name           = "vp6f",
    .type           = AVMEDIA_TYPE_VIDEO,
    .id             = AV_CODEC_ID_VP6F,
    .priv_data_size = sizeof(VP56Context),
    .init           = vp6_decode_init,
    .close          = vp6_decode_free,
    .decode         = ff_vp56_decode_frame,
    .capabilities   = CODEC_CAP_DR1,
    .long_name      = NULL_IF_CONFIG_SMALL("On2 VP6 (Flash version)"),
}

Definition at line 673 of file vp6.c.