huffyuvdec.c File Reference

huffyuv decoder More...

#include "avcodec.h"
#include "get_bits.h"
#include "huffyuv.h"
#include "thread.h"

Go to the source code of this file.

Macros
#define	classic_shift_luma_table_size   42
#define	classic_shift_chroma_table_size   59
#define	READ_2PIX(dst0, dst1, plane1)

Functions
static int	read_len_table (uint8_t *dst, GetBitContext *gb)
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 int	decode_init (AVCodecContext *avctx)
static av_cold int	decode_init_thread_copy (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 void	draw_slice (HYuvContext *s, AVFrame *frame, int y)
static int	decode_frame (AVCodecContext *avctx, void *data, int *got_frame, AVPacket *avpkt)
static av_cold int	decode_end (AVCodecContext *avctx)

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 decoder

Definition in file huffyuvdec.c.

Macro Definition Documentation

#define classic_shift_luma_table_size   42

Definition at line 36 of file huffyuvdec.c.

Referenced by read_old_huffman_tables().

#define classic_shift_chroma_table_size   59

Definition at line 44 of file huffyuvdec.c.

Referenced by read_old_huffman_tables().

#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 387 of file huffyuvdec.c.

Referenced by decode_422_bitstream(), and decode_gray_bitstream().

Function Documentation

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

static

Definition at line 90 of file huffyuvdec.c.

Referenced by read_huffman_tables(), and read_old_huffman_tables().

static int generate_joint_tables ( HYuvContext *  s )

static

Definition at line 109 of file huffyuvdec.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 187 of file huffyuvdec.c.

Referenced by decode_frame(), decode_init(), and decode_init_thread_copy().

static int read_old_huffman_tables ( HYuvContext *  s )

static

Definition at line 213 of file huffyuvdec.c.

Referenced by decode_init(), and decode_init_thread_copy().

static av_cold int decode_init ( AVCodecContext *  avctx )

static

Definition at line 252 of file huffyuvdec.c.

static av_cold int decode_init_thread_copy ( AVCodecContext *  avctx )

static

Definition at line 360 of file huffyuvdec.c.

static void decode_422_bitstream ( HYuvContext *  s, int  count  )

static

Definition at line 398 of file huffyuvdec.c.

Referenced by decode_frame().

static void decode_gray_bitstream ( HYuvContext *  s, int  count  )

static

Definition at line 417 of file huffyuvdec.c.

Referenced by decode_frame().

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

static

Definition at line 434 of file huffyuvdec.c.

Referenced by decode_bgr_bitstream().

static void decode_bgr_bitstream ( HYuvContext *  s, int  count  )

static

Definition at line 458 of file huffyuvdec.c.

Referenced by decode_frame().

static void draw_slice ( HYuvContext *  s, AVFrame *  frame, int  y  )

static

Definition at line 473 of file huffyuvdec.c.

Referenced by decode_frame().

static int decode_frame ( AVCodecContext *  avctx, void *  data, int *  got_frame, AVPacket *  avpkt  )

static

Definition at line 502 of file huffyuvdec.c.

static av_cold int decode_end ( AVCodecContext *  avctx )

static

Definition at line 751 of file huffyuvdec.c.

Variable Documentation

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,
  0,0,0,0,0,0,0,0,
}

Definition at line 37 of file huffyuvdec.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,
  0,0,0,0,0,0,0,0,
}

Definition at line 45 of file huffyuvdec.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 52 of file huffyuvdec.c.

Referenced by read_old_huffman_tables().

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 71 of file huffyuvdec.c.

Referenced by read_old_huffman_tables().