FFmpeg
Macros | Functions | Variables
vp6.c File Reference
#include <stdlib.h>
#include "avcodec.h"
#include "codec_internal.h"
#include "get_bits.h"
#include "huffman.h"
#include "internal.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 int vp6_parse_coeff (VP56Context *s)
 
static int 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. More...
 
static int vp6_block_variance (uint8_t *src, ptrdiff_t stride)
 
static void vp6_filter_hv4 (uint8_t *dst, uint8_t *src, ptrdiff_t stride, int delta, const int16_t *weights)
 
static void vp6_filter_diag2 (VP56Context *s, uint8_t *dst, uint8_t *src, ptrdiff_t stride, int h_weight, int v_weight)
 
static void vp6_filter (VP56Context *s, uint8_t *dst, uint8_t *src, int offset1, int offset2, ptrdiff_t stride, VP56mv mv, int mask, int select, int luma)
 
static av_cold int vp6_decode_init_context (AVCodecContext *avctx, VP56Context *s, int flip, int has_alpha)
 
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

const FFCodec ff_vp6_decoder
 
const FFCodec ff_vp6f_decoder
 
const FFCodec ff_vp6a_decoder
 

Detailed Description

VP6 compatible video decoder

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

Definition in file vp6.c.

Macro Definition Documentation

◆ VP6_MAX_HUFF_SIZE

#define VP6_MAX_HUFF_SIZE   12

Definition at line 42 of file vp6.c.

Function Documentation

◆ vp6_parse_coeff()

static int vp6_parse_coeff ( VP56Context *  s)
static

Definition at line 469 of file vp6.c.

Referenced by vp6_parse_header().

◆ vp6_parse_coeff_huffman()

static int vp6_parse_coeff_huffman ( VP56Context *  s)
static

Definition at line 408 of file vp6.c.

Referenced by vp6_parse_header().

◆ vp6_parse_header()

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

Definition at line 47 of file vp6.c.

Referenced by vp6_decode_init_context().

◆ vp6_coeff_order_table_init()

static void vp6_coeff_order_table_init ( VP56Context *  s)
static

Definition at line 191 of file vp6.c.

Referenced by vp6_default_models_init(), and vp6_parse_coeff_models().

◆ vp6_default_models_init()

static void vp6_default_models_init ( VP56Context *  s)
static

Definition at line 214 of file vp6.c.

Referenced by vp6_decode_init_context().

◆ vp6_parse_vector_models()

static void vp6_parse_vector_models ( VP56Context *  s)
static

Definition at line 232 of file vp6.c.

Referenced by vp6_decode_init_context().

◆ vp6_huff_cmp()

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

Definition at line 257 of file vp6.c.

Referenced by vp6_build_huff_tree().

◆ 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 263 of file vp6.c.

Referenced by vp6_parse_coeff_models().

◆ vp6_parse_coeff_models()

static int vp6_parse_coeff_models ( VP56Context *  s)
static

Definition at line 285 of file vp6.c.

Referenced by vp6_decode_init_context().

◆ vp6_parse_vector_adjustment()

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

Definition at line 354 of file vp6.c.

Referenced by vp6_decode_init_context().

◆ vp6_get_nb_null()

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 396 of file vp6.c.

Referenced by vp6_parse_coeff_huffman().

◆ vp6_block_variance()

static int vp6_block_variance ( uint8_t *  src,
ptrdiff_t  stride 
)
static

Definition at line 551 of file vp6.c.

Referenced by vp6_filter().

◆ vp6_filter_hv4()

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

Definition at line 566 of file vp6.c.

Referenced by vp6_filter().

◆ vp6_filter_diag2()

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

Definition at line 583 of file vp6.c.

Referenced by vp6_filter().

◆ vp6_filter()

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

Definition at line 591 of file vp6.c.

Referenced by vp6_decode_init_context().

◆ vp6_decode_init_context()

static av_cold int vp6_decode_init_context ( AVCodecContext *  avctx,
VP56Context *  s,
int  flip,
int  has_alpha 
)
static

Definition at line 641 of file vp6.c.

Referenced by vp6_decode_init().

◆ vp6_decode_init()

static av_cold int vp6_decode_init ( AVCodecContext *  avctx)
static

Definition at line 662 of file vp6.c.

◆ vp6_decode_free_context()

static av_cold void vp6_decode_free_context ( VP56Context *  s)
static

Definition at line 700 of file vp6.c.

Referenced by vp6_decode_free().

◆ vp6_decode_free()

static av_cold int vp6_decode_free ( AVCodecContext *  avctx)
static

Definition at line 686 of file vp6.c.

Variable Documentation

◆ ff_vp6_decoder

const FFCodec ff_vp6_decoder
Initial value:
= {
.p.name = "vp6",
.p.long_name = NULL_IF_CONFIG_SMALL("On2 VP6"),
.p.type = AVMEDIA_TYPE_VIDEO,
.p.id = AV_CODEC_ID_VP6,
.priv_data_size = sizeof(VP56Context),
.init = vp6_decode_init,
.close = vp6_decode_free,
FF_CODEC_DECODE_CB(ff_vp56_decode_frame),
.p.capabilities = AV_CODEC_CAP_DR1,
.caps_internal = FF_CODEC_CAP_INIT_THREADSAFE | FF_CODEC_CAP_INIT_CLEANUP,
}

Definition at line 715 of file vp6.c.

◆ ff_vp6f_decoder

const FFCodec ff_vp6f_decoder
Initial value:
= {
.p.name = "vp6f",
.p.long_name = NULL_IF_CONFIG_SMALL("On2 VP6 (Flash version)"),
.p.type = AVMEDIA_TYPE_VIDEO,
.p.id = AV_CODEC_ID_VP6F,
.priv_data_size = sizeof(VP56Context),
.init = vp6_decode_init,
.close = vp6_decode_free,
FF_CODEC_DECODE_CB(ff_vp56_decode_frame),
.p.capabilities = AV_CODEC_CAP_DR1,
.caps_internal = FF_CODEC_CAP_INIT_THREADSAFE | FF_CODEC_CAP_INIT_CLEANUP,
}

Definition at line 729 of file vp6.c.

◆ ff_vp6a_decoder

const FFCodec ff_vp6a_decoder
Initial value:
= {
.p.name = "vp6a",
.p.long_name = NULL_IF_CONFIG_SMALL("On2 VP6 (Flash version, with alpha channel)"),
.p.type = AVMEDIA_TYPE_VIDEO,
.p.id = AV_CODEC_ID_VP6A,
.priv_data_size = 2 * sizeof(VP56Context),
.init = vp6_decode_init,
.close = vp6_decode_free,
FF_CODEC_DECODE_CB(ff_vp56_decode_frame),
.p.capabilities = AV_CODEC_CAP_DR1 | AV_CODEC_CAP_SLICE_THREADS,
.caps_internal = FF_CODEC_CAP_INIT_THREADSAFE | FF_CODEC_CAP_INIT_CLEANUP,
}

Definition at line 743 of file vp6.c.

AV_CODEC_ID_VP6F
@ AV_CODEC_ID_VP6F
Definition: codec_id.h:142
FF_CODEC_CAP_INIT_CLEANUP
#define FF_CODEC_CAP_INIT_CLEANUP
The codec allows calling the close function for deallocation even if the init function returned a fai...
Definition: codec_internal.h:39
vp6_decode_free
static av_cold int vp6_decode_free(AVCodecContext *avctx)
Definition: vp6.c:686
AV_CODEC_ID_VP6
@ AV_CODEC_ID_VP6
Definition: codec_id.h:141
init
static int init
Definition: av_tx.c:47
FF_CODEC_DECODE_CB
#define FF_CODEC_DECODE_CB(func)
Definition: codec_internal.h:254
AV_CODEC_ID_VP6A
@ AV_CODEC_ID_VP6A
Definition: codec_id.h:156
AV_CODEC_CAP_DR1
#define AV_CODEC_CAP_DR1
Codec uses get_buffer() or get_encode_buffer() for allocating buffers and supports custom allocators.
Definition: codec.h:52
NULL_IF_CONFIG_SMALL
#define NULL_IF_CONFIG_SMALL(x)
Return NULL if CONFIG_SMALL is true, otherwise the argument without modification.
Definition: internal.h:117
AV_CODEC_CAP_SLICE_THREADS
#define AV_CODEC_CAP_SLICE_THREADS
Codec supports slice-based (or partition-based) multithreading.
Definition: codec.h:117
vp6_decode_init
static av_cold int vp6_decode_init(AVCodecContext *avctx)
Definition: vp6.c:662
FF_CODEC_CAP_INIT_THREADSAFE
#define FF_CODEC_CAP_INIT_THREADSAFE
The codec does not modify any global variables in the init function, allowing to call the init functi...
Definition: codec_internal.h:31
ff_vp56_decode_frame
int ff_vp56_decode_frame(AVCodecContext *avctx, AVFrame *rframe, int *got_frame, AVPacket *avpkt)
Definition: vp56.c:568
AVMEDIA_TYPE_VIDEO
@ AVMEDIA_TYPE_VIDEO
Definition: avutil.h:201
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