Data Structures | Macros | Typedefs | Enumerations | Functions | Variables
huffyuv.c File Reference

huffyuv codec for libavcodec. More...

#include "avcodec.h"
#include "get_bits.h"
#include "put_bits.h"
#include "dsputil.h"
#include "thread.h"

Go to the source code of this file.

Data Structures

struct  HYuvContext

Macros

#define VLC_BITS   11
#define B   0
#define G   1
#define R   2
#define A   3
#define classic_shift_luma_table_size   42
#define classic_shift_chroma_table_size   59
#define READ_2PIX(dst0, dst1, plane1)
#define LOAD3
#define STAT3
#define WRITE3

Typedefs

typedef enum Predictor Predictor
typedef struct HYuvContext HYuvContext

Enumerations

enum  Predictor { LEFT = 0, PLANE, MEDIAN }

Functions

static int sub_left_prediction (HYuvContext *s, uint8_t *dst, uint8_t *src, int w, int left)
static void sub_left_prediction_bgr32 (HYuvContext *s, uint8_t *dst, uint8_t *src, int w, int *red, int *green, int *blue)
static int read_len_table (uint8_t *dst, GetBitContext *gb)
static int generate_bits_table (uint32_t *dst, const uint8_t *len_table)
static int generate_joint_tables (HYuvContext *s)
static int read_huffman_tables (HYuvContext *s, const uint8_t *src, int length)
static int read_old_huffman_tables (HYuvContext *s)
static av_cold void alloc_temp (HYuvContext *s)
static av_cold int common_init (AVCodecContext *avctx)
static void decode_422_bitstream (HYuvContext *s, int count)
static void decode_gray_bitstream (HYuvContext *s, int count)
static av_always_inline void decode_bgr_1 (HYuvContext *s, int count, int decorrelate, int alpha)
static void decode_bgr_bitstream (HYuvContext *s, int count)
static int encode_bgr_bitstream (HYuvContext *s, int count)
static int common_end (HYuvContext *s)

Variables

static const unsigned char classic_shift_luma [classic_shift_luma_table_size+FF_INPUT_BUFFER_PADDING_SIZE]
static const unsigned char classic_shift_chroma [classic_shift_chroma_table_size+FF_INPUT_BUFFER_PADDING_SIZE]
static const unsigned char classic_add_luma [256]
static const unsigned char classic_add_chroma [256]

Detailed Description

huffyuv codec for libavcodec.

Definition in file huffyuv.c.

Macro Definition Documentation

#define A   3

Definition at line 48 of file huffyuv.c.

#define B   0

Definition at line 45 of file huffyuv.c.

Referenced by decode_bgr_1(), generate_joint_tables(), and sub_left_prediction_bgr32().

#define classic_shift_chroma_table_size   59

Definition at line 92 of file huffyuv.c.

Referenced by read_old_huffman_tables().

#define classic_shift_luma_table_size   42

Definition at line 85 of file huffyuv.c.

Referenced by read_old_huffman_tables().

#define G   1

Definition at line 46 of file huffyuv.c.

Referenced by decode_bgr_1(), generate_joint_tables(), and sub_left_prediction_bgr32().

#define LOAD3
Value:
int g= s->temp[0][4*i+G];\
int b= (s->temp[0][4*i+B] - g) & 0xff;\
int r= (s->temp[0][4*i+R] - g) & 0xff;

Referenced by encode_bgr_bitstream().

#define R   2

Definition at line 47 of file huffyuv.c.

Referenced by decode_bgr_1(), generate_joint_tables(), and sub_left_prediction_bgr32().

#define READ_2PIX (   dst0,
  dst1,
  plane1 
)
Value:
{\
uint16_t code = get_vlc2(&s->gb, s->vlc[3+plane1].table, VLC_BITS, 1);\
if(code != 0xffff){\
dst0 = code>>8;\
dst1 = code;\
}else{\
dst0 = get_vlc2(&s->gb, s->vlc[0].table, VLC_BITS, 3);\
dst1 = get_vlc2(&s->gb, s->vlc[plane1].table, VLC_BITS, 3);\
}\
}

Definition at line 733 of file huffyuv.c.

Referenced by decode_422_bitstream(), and decode_gray_bitstream().

#define STAT3
Value:
s->stats[0][b]++;\
s->stats[1][g]++;\
s->stats[2][r]++;

Referenced by encode_bgr_bitstream().

#define VLC_BITS   11

Definition at line 37 of file huffyuv.c.

Referenced by decode_bgr_1(), generate_joint_tables(), read_huffman_tables(), and read_old_huffman_tables().

#define WRITE3
Value:
put_bits(&s->pb, s->len[1][g], s->bits[1][g]);\
put_bits(&s->pb, s->len[0][b], s->bits[0][b]);\
put_bits(&s->pb, s->len[2][r], s->bits[2][r]);

Referenced by encode_bgr_bitstream().

Typedef Documentation

typedef struct HYuvContext HYuvContext
typedef enum Predictor Predictor

Enumeration Type Documentation

enum Predictor
Enumerator:
LEFT 
PLANE 
MEDIAN 

Definition at line 51 of file huffyuv.c.

Function Documentation

static av_cold void alloc_temp ( HYuvContext *  s)
static

Definition at line 419 of file huffyuv.c.

static int common_end ( HYuvContext *  s)
static

Definition at line 1230 of file huffyuv.c.

static av_cold int common_init ( AVCodecContext *  avctx)
static

Definition at line 431 of file huffyuv.c.

static void decode_422_bitstream ( HYuvContext *  s,
int  count 
)
static

Definition at line 744 of file huffyuv.c.

static av_always_inline void decode_bgr_1 ( HYuvContext *  s,
int  count,
int  decorrelate,
int  alpha 
)
static

Definition at line 876 of file huffyuv.c.

Referenced by decode_bgr_bitstream().

static void decode_bgr_bitstream ( HYuvContext *  s,
int  count 
)
static

Definition at line 896 of file huffyuv.c.

static void decode_gray_bitstream ( HYuvContext *  s,
int  count 
)
static

Definition at line 762 of file huffyuv.c.

static int encode_bgr_bitstream ( HYuvContext *  s,
int  count 
)
static

Definition at line 910 of file huffyuv.c.

static int generate_bits_table ( uint32_t *  dst,
const uint8_t *  len_table 
)
static

Definition at line 199 of file huffyuv.c.

Referenced by read_huffman_tables().

static int generate_joint_tables ( HYuvContext *  s)
static

Definition at line 276 of file huffyuv.c.

Referenced by read_huffman_tables(), and read_old_huffman_tables().

static int read_huffman_tables ( HYuvContext *  s,
const uint8_t *  src,
int  length 
)
static

Definition at line 352 of file huffyuv.c.

static int read_len_table ( uint8_t *  dst,
GetBitContext *  gb 
)
static

Definition at line 180 of file huffyuv.c.

Referenced by read_huffman_tables(), and read_old_huffman_tables().

static int read_old_huffman_tables ( HYuvContext *  s)
static

Definition at line 376 of file huffyuv.c.

static int sub_left_prediction ( HYuvContext *  s,
uint8_t *  dst,
uint8_t *  src,
int  w,
int  left 
)
inlinestatic

Definition at line 137 of file huffyuv.c.

static void sub_left_prediction_bgr32 ( HYuvContext *  s,
uint8_t *  dst,
uint8_t *  src,
int  w,
int *  red,
int *  green,
int *  blue 
)
inlinestatic

Definition at line 157 of file huffyuv.c.

Variable Documentation

const unsigned char classic_add_chroma[256]
static
Initial value:
{
3, 1, 2, 2, 2, 2, 3, 3, 7, 5, 7, 5, 8, 6, 11, 9,
7, 13, 11, 10, 9, 8, 7, 5, 9, 7, 6, 4, 7, 5, 8, 7,
11, 8, 13, 11, 19, 15, 22, 23, 20, 33, 32, 28, 27, 29, 51, 77,
43, 45, 76, 81, 46, 82, 75, 55, 56,144, 58, 80, 60, 74,147, 63,
143, 65, 66, 67, 68, 69, 70, 71, 72, 73, 74, 75, 76, 77, 78, 79,
80, 81, 82, 83, 84, 85, 86, 87, 88, 89, 90, 91, 27, 30, 21, 22,
17, 14, 5, 6,100, 54, 47, 50, 51, 53,106,107,108,109,110,111,
112,113,114,115, 4,117,118, 92, 94,121,122, 3,124,103, 2, 1,
0,129,130,131,120,119,126,125,136,137,138,139,140,141,142,134,
135,132,133,104, 64,101, 62, 57,102, 95, 93, 59, 61, 28, 97, 96,
52, 49, 48, 29, 32, 25, 24, 46, 23, 98, 45, 44, 43, 20, 42, 41,
19, 18, 99, 40, 15, 39, 38, 16, 13, 12, 11, 37, 10, 9, 8, 36,
7,128,127,105,123,116, 35, 34, 33,145, 31, 79, 42,146, 78, 26,
83, 48, 49, 50, 44, 47, 26, 31, 30, 18, 17, 19, 21, 24, 25, 13,
14, 16, 17, 18, 20, 21, 12, 14, 15, 9, 10, 6, 9, 6, 5, 8,
6, 12, 8, 10, 7, 9, 6, 4, 6, 2, 2, 3, 3, 3, 3, 2,
}

Definition at line 118 of file huffyuv.c.

Referenced by read_old_huffman_tables().

const unsigned char classic_add_luma[256]
static
Initial value:
{
3, 9, 5, 12, 10, 35, 32, 29, 27, 50, 48, 45, 44, 41, 39, 37,
73, 70, 68, 65, 64, 61, 58, 56, 53, 50, 49, 46, 44, 41, 38, 36,
68, 65, 63, 61, 58, 55, 53, 51, 48, 46, 45, 43, 41, 39, 38, 36,
35, 33, 32, 30, 29, 27, 26, 25, 48, 47, 46, 44, 43, 41, 40, 39,
37, 36, 35, 34, 32, 31, 30, 28, 27, 26, 24, 23, 22, 20, 19, 37,
35, 34, 33, 31, 30, 29, 27, 26, 24, 23, 21, 20, 18, 17, 15, 29,
27, 26, 24, 22, 21, 19, 17, 16, 14, 26, 25, 23, 21, 19, 18, 16,
15, 27, 25, 23, 21, 19, 17, 16, 14, 26, 25, 23, 21, 18, 17, 14,
12, 17, 19, 13, 4, 9, 2, 11, 1, 7, 8, 0, 16, 3, 14, 6,
12, 10, 5, 15, 18, 11, 10, 13, 15, 16, 19, 20, 22, 24, 27, 15,
18, 20, 22, 24, 26, 14, 17, 20, 22, 24, 27, 15, 18, 20, 23, 25,
28, 16, 19, 22, 25, 28, 32, 36, 21, 25, 29, 33, 38, 42, 45, 49,
28, 31, 34, 37, 40, 42, 44, 47, 49, 50, 52, 54, 56, 57, 59, 60,
62, 64, 66, 67, 69, 35, 37, 39, 40, 42, 43, 45, 47, 48, 51, 52,
54, 55, 57, 59, 60, 62, 63, 66, 67, 69, 71, 72, 38, 40, 42, 43,
46, 47, 49, 51, 26, 28, 30, 31, 33, 34, 18, 19, 11, 13, 7, 8,
}

Definition at line 99 of file huffyuv.c.

Referenced by read_old_huffman_tables().

const unsigned char classic_shift_chroma[classic_shift_chroma_table_size+FF_INPUT_BUFFER_PADDING_SIZE]
static
Initial value:
{
66,36,37,38,39,40,41,75,76,77,110,239,144,81,82,83,84,85,118,183,
56,57,88,89,56,89,154,57,58,57,26,141,57,56,58,57,58,57,184,119,
214,245,116,83,82,49,80,79,78,77,44,75,41,40,39,38,37,36,34, 0
}

Definition at line 93 of file huffyuv.c.

Referenced by read_old_huffman_tables().

const unsigned char classic_shift_luma[classic_shift_luma_table_size+FF_INPUT_BUFFER_PADDING_SIZE]
static
Initial value:
{
34,36,35,69,135,232,9,16,10,24,11,23,12,16,13,10,14,8,15,8,
16,8,17,20,16,10,207,206,205,236,11,8,10,21,9,23,8,8,199,70,
69,68, 0
}

Definition at line 86 of file huffyuv.c.

Referenced by read_old_huffman_tables().