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, int *golden_frame)
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 int vp6_decode_init (AVCodecContext *avctx)
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.

Copyright (C) 2006 Aurelien Jacobs <aurel@gnuage.org>

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

This file is part of FFmpeg.

FFmpeg is free software; you can redistribute it and/or modify it under the terms of the GNU Lesser General Public License as published by the Free Software Foundation; either version 2.1 of the License, or (at your option) any later version.

FFmpeg is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License for more details.

You should have received a copy of the GNU Lesser General Public License along with FFmpeg; if not, write to the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA

Definition in file vp6.c.


Define Documentation

#define VP6_MAX_HUFF_SIZE   12

Definition at line 39 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 501 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 223 of file vp6.c.

Referenced by vp6_parse_coeff_models().

static void vp6_coeff_order_table_init ( VP56Context s  )  [static]

Definition at line 163 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 608 of file vp6.c.

static av_cold int vp6_decode_init ( AVCodecContext avctx  )  [static]

Definition at line 591 of file vp6.c.

static void vp6_default_models_init ( VP56Context s  )  [static]

Definition at line 174 of file vp6.c.

Referenced by vp6_decode_init().

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 541 of file vp6.c.

Referenced by vp6_decode_init().

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 533 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 516 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 355 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 217 of file vp6.c.

Referenced by vp6_build_huff_tree().

static void vp6_parse_coeff ( VP56Context s  )  [static]

Definition at line 426 of file vp6.c.

Referenced by vp6_parse_header().

static void vp6_parse_coeff_huffman ( VP56Context s  )  [static]

Definition at line 367 of file vp6.c.

Referenced by vp6_parse_header().

static int vp6_parse_coeff_models ( VP56Context s  )  [static]

Definition at line 244 of file vp6.c.

Referenced by vp6_decode_init().

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

Definition at line 44 of file vp6.c.

Referenced by vp6_decode_init().

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

Definition at line 313 of file vp6.c.

Referenced by vp6_decode_init().

static void vp6_parse_vector_models ( VP56Context s  )  [static]

Definition at line 192 of file vp6.c.

Referenced by vp6_decode_init().


Variable Documentation

Initial value:

Definition at line 625 of file vp6.c.

Initial value:

 {
    "vp6a",
    AVMEDIA_TYPE_VIDEO,
    CODEC_ID_VP6A,
    sizeof(VP56Context),
    vp6_decode_init,
    NULL,
    vp6_decode_free,
    ff_vp56_decode_frame,
    CODEC_CAP_DR1,
    .long_name = NULL_IF_CONFIG_SMALL("On2 VP6 (Flash version, with alpha channel)"),
}

Definition at line 653 of file vp6.c.

Initial value:

Definition at line 639 of file vp6.c.


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