vp6.c File Reference

VP6 compatible video decoder. More...

#include <stdlib.h>
#include "avcodec.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.

Macros
#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.

Macro Definition Documentation

#define VP6_MAX_HUFF_SIZE   12

Definition at line 40 of file vp6.c.

Referenced by vp6_build_huff_tree().

Function Documentation

static void vp6_parse_coeff ( VP56Context *  s )

static

Definition at line 438 of file vp6.c.

Referenced by vp6_parse_header().

static void vp6_parse_coeff_huffman ( VP56Context *  s )

static

Definition at line 379 of file vp6.c.

Referenced by vp6_parse_header().

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

static

Definition at line 45 of file vp6.c.

Referenced by vp6_decode_init_context().

static void vp6_coeff_order_table_init ( VP56Context *  s )

static

Definition at line 174 of file vp6.c.

Referenced by vp6_default_models_init(), and vp6_parse_coeff_models().

static void vp6_default_models_init ( VP56Context *  s )

static

Definition at line 185 of file vp6.c.

Referenced by vp6_decode_init_context().

static void vp6_parse_vector_models ( VP56Context *  s )

static

Definition at line 203 of file vp6.c.

Referenced by vp6_decode_init_context().

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

static

Definition at line 228 of file vp6.c.

Referenced by vp6_build_huff_tree().

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

static

Definition at line 234 of file vp6.c.

Referenced by vp6_parse_coeff_models().

static int vp6_parse_coeff_models ( VP56Context *  s )

static

Definition at line 256 of file vp6.c.

Referenced by vp6_decode_init_context().

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

static

Definition at line 325 of file vp6.c.

Referenced by vp6_decode_init_context().

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 367 of file vp6.c.

Referenced by vp6_parse_coeff_huffman().

static int vp6_block_variance ( uint8_t *  src, int  stride  )

static

Definition at line 513 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 528 of file vp6.c.

Referenced by vp6_filter().

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 545 of file vp6.c.

Referenced by vp6_filter().

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 553 of file vp6.c.

Referenced by vp6_decode_init_context().

static av_cold void vp6_decode_init_context ( VP56Context *  s )

static

Definition at line 626 of file vp6.c.

Referenced by vp6_decode_init().

static av_cold int vp6_decode_init ( AVCodecContext *  avctx )

static

Definition at line 605 of file vp6.c.

static av_cold void vp6_decode_free_context ( VP56Context *  s )

static

Definition at line 656 of file vp6.c.

Referenced by vp6_decode_free().

static av_cold int vp6_decode_free ( AVCodecContext *  avctx )

static

Definition at line 640 of file vp6.c.

Variable Documentation

AVCodec ff_vp6_decoder

Initial value:

= {
    .name           = "vp6",
    .long_name      = NULL_IF_CONFIG_SMALL("On2 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,
}

Definition at line 669 of file vp6.c.

AVCodec ff_vp6f_decoder

Initial value:

= {
    .name           = "vp6f",
    .long_name      = NULL_IF_CONFIG_SMALL("On2 VP6 (Flash version)"),
    .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,
}

Definition at line 682 of file vp6.c.

AVCodec ff_vp6a_decoder

Initial value:

= {
    .name           = "vp6a",
    .long_name      = NULL_IF_CONFIG_SMALL("On2 VP6 (Flash version, with alpha channel)"),
    .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,
}

Definition at line 695 of file vp6.c.