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hqx.c File Reference
#include <inttypes.h>
#include "libavutil/imgutils.h"
#include "libavutil/intreadwrite.h"
#include "avcodec.h"
#include "get_bits.h"
#include "internal.h"
#include "hqx.h"

Go to the source code of this file.

Macros

#define HQX_HEADER_SIZE   59
 

Typedefs

typedef int(* mb_decode_func )(HQXContext *ctx, AVFrame *pic, GetBitContext *gb, int x, int y)
 

Enumerations

enum  HQXFormat { HQX_422 = 0, HQX_444, HQX_422A, HQX_444A }
 

Functions

static void idct_col (int16_t *blk, const uint8_t *quant)
 
static void idct_row (int16_t *blk)
 
static void hqx_idct (int16_t *block, const uint8_t *quant)
 
static void hqx_idct_put (uint16_t *dst, ptrdiff_t stride, int16_t *block, const uint8_t *quant)
 
static void put_blocks (AVFrame *pic, int plane, int x, int y, int ilace, int16_t *block0, int16_t *block1, const uint8_t *quant)
 
static void hqx_get_ac (GetBitContext *gb, const HQXAC *ac, int *run, int *lev)
 
static int decode_block (GetBitContext *gb, VLC *vlc, const int *quants, int dcb, int16_t block[64], int *last_dc)
 
static int hqx_decode_422 (HQXContext *ctx, AVFrame *pic, GetBitContext *gb, int x, int y)
 
static int hqx_decode_422a (HQXContext *ctx, AVFrame *pic, GetBitContext *gb, int x, int y)
 
static int hqx_decode_444 (HQXContext *ctx, AVFrame *pic, GetBitContext *gb, int x, int y)
 
static int hqx_decode_444a (HQXContext *ctx, AVFrame *pic, GetBitContext *gb, int x, int y)
 
static int decode_slice (HQXContext *ctx, AVFrame *pic, GetBitContext *gb, int slice_no, mb_decode_func decode_func)
 
static int hqx_decode_frame (AVCodecContext *avctx, void *data, int *got_picture_ptr, AVPacket *avpkt)
 
static av_cold int hqx_decode_close (AVCodecContext *avctx)
 
static av_cold int hqx_decode_init (AVCodecContext *avctx)
 

Variables

static const int hqx_quants [16][4]
 
static const uint8_t hqx_quant_luma [64]
 
static const uint8_t hqx_quant_chroma [64]
 
static const int shuffle_16 [16]
 
AVCodec ff_hqx_decoder
 

Macro Definition Documentation

#define HQX_HEADER_SIZE   59

Definition at line 40 of file hqx.c.

Referenced by hqx_decode_frame().

Typedef Documentation

typedef int(* mb_decode_func)(HQXContext *ctx, AVFrame *pic, GetBitContext *gb, int x, int y)

Definition at line 42 of file hqx.c.

Enumeration Type Documentation

enum HQXFormat
Enumerator:
HQX_422 
HQX_444 
HQX_422A 
HQX_444A 

Definition at line 33 of file hqx.c.

Function Documentation

static void idct_col ( int16_t *  blk,
const uint8_t *  quant 
)
inlinestatic

Definition at line 84 of file hqx.c.

Referenced by hqx_idct().

static void idct_row ( int16_t *  blk)
inlinestatic

Definition at line 130 of file hqx.c.

Referenced by hqx_idct().

static void hqx_idct ( int16_t *  block,
const uint8_t *  quant 
)
static

Definition at line 166 of file hqx.c.

Referenced by hqx_idct_put().

static void hqx_idct_put ( uint16_t *  dst,
ptrdiff_t  stride,
int16_t *  block,
const uint8_t *  quant 
)
static

Definition at line 176 of file hqx.c.

Referenced by put_blocks().

static void put_blocks ( AVFrame *  pic,
int  plane,
int  x,
int  y,
int  ilace,
int16_t *  block0,
int16_t *  block1,
const uint8_t *  quant 
)
inlinestatic

Definition at line 192 of file hqx.c.

Referenced by hqx_decode_422(), hqx_decode_422a(), hqx_decode_444(), and hqx_decode_444a().

static void hqx_get_ac ( GetBitContext *  gb,
const HQXAC *  ac,
int *  run,
int *  lev 
)
inlinestatic

Definition at line 206 of file hqx.c.

Referenced by decode_block().

static int decode_block ( GetBitContext *  gb,
VLC *  vlc,
const int *  quants,
int  dcb,
int16_t  block[64],
int *  last_dc 
)
static

Definition at line 222 of file hqx.c.

Referenced by hqx_decode_422(), hqx_decode_422a(), hqx_decode_444(), and hqx_decode_444a().

static int hqx_decode_422 ( HQXContext *  ctx,
AVFrame *  pic,
GetBitContext *  gb,
int  x,
int  y 
)
static

Definition at line 263 of file hqx.c.

Referenced by hqx_decode_frame().

static int hqx_decode_422a ( HQXContext *  ctx,
AVFrame *  pic,
GetBitContext *  gb,
int  x,
int  y 
)
static

Definition at line 296 of file hqx.c.

Referenced by hqx_decode_frame().

static int hqx_decode_444 ( HQXContext *  ctx,
AVFrame *  pic,
GetBitContext *  gb,
int  x,
int  y 
)
static

Definition at line 345 of file hqx.c.

Referenced by hqx_decode_frame().

static int hqx_decode_444a ( HQXContext *  ctx,
AVFrame *  pic,
GetBitContext *  gb,
int  x,
int  y 
)
static

Definition at line 380 of file hqx.c.

Referenced by hqx_decode_frame().

static int decode_slice ( HQXContext *  ctx,
AVFrame *  pic,
GetBitContext *  gb,
int  slice_no,
mb_decode_func  decode_func 
)
static

Definition at line 432 of file hqx.c.

Referenced by hqx_decode_frame().

static int hqx_decode_frame ( AVCodecContext *  avctx,
void *  data,
int *  got_picture_ptr,
AVPacket *  avpkt 
)
static

Definition at line 486 of file hqx.c.

static av_cold int hqx_decode_close ( AVCodecContext *  avctx)
static

Definition at line 611 of file hqx.c.

Referenced by hqx_decode_init().

static av_cold int hqx_decode_init ( AVCodecContext *  avctx)
static

Definition at line 624 of file hqx.c.

Variable Documentation

const int hqx_quants[16][4]
static
Initial value:
= {
{ 0x1, 0x2, 0x4, 0x8 }, { 0x1, 0x3, 0x6, 0xC },
{ 0x2, 0x4, 0x8, 0x10 }, { 0x3, 0x6, 0xC, 0x18 },
{ 0x4, 0x8, 0x10, 0x20 }, { 0x6, 0xC, 0x18, 0x30 },
{ 0x8, 0x10, 0x20, 0x40 },
{ 0xA, 0x14, 0x28, 0x50 },
{ 0xC, 0x18, 0x30, 0x60 },
{ 0x10, 0x20, 0x40, 0x80 }, { 0x18, 0x30, 0x60, 0xC0 },
{ 0x20, 0x40, 0x80, 0x100 }, { 0x30, 0x60, 0xC0, 0x180 },
{ 0x40, 0x80, 0x100, 0x200 }, { 0x60, 0xC0, 0x180, 0x300 },
{ 0x80, 0x100, 0x200, 0x400 }
}

Definition at line 49 of file hqx.c.

Referenced by hqx_decode_422(), hqx_decode_422a(), hqx_decode_444(), and hqx_decode_444a().

const uint8_t hqx_quant_luma[64]
static
Initial value:
= {
16, 16, 16, 19, 19, 19, 42, 44,
16, 16, 19, 19, 19, 38, 43, 45,
16, 19, 19, 19, 40, 41, 45, 48,
19, 19, 19, 40, 41, 42, 46, 49,
19, 19, 40, 41, 42, 43, 48, 101,
19, 38, 41, 42, 43, 44, 98, 104,
42, 43, 45, 46, 48, 98, 109, 116,
44, 45, 48, 49, 101, 104, 116, 123,
}

Definition at line 62 of file hqx.c.

Referenced by hqx_decode_422(), hqx_decode_422a(), hqx_decode_444(), and hqx_decode_444a().

const uint8_t hqx_quant_chroma[64]
static
Initial value:
= {
16, 16, 19, 25, 26, 26, 42, 44,
16, 19, 25, 25, 26, 38, 43, 91,
19, 25, 26, 27, 40, 41, 91, 96,
25, 25, 27, 40, 41, 84, 93, 197,
26, 26, 40, 41, 84, 86, 191, 203,
26, 38, 41, 84, 86, 177, 197, 209,
42, 43, 91, 93, 191, 197, 219, 232,
44, 91, 96, 197, 203, 209, 232, 246,
}

Definition at line 73 of file hqx.c.

Referenced by hqx_decode_422(), hqx_decode_422a(), hqx_decode_444(), and hqx_decode_444a().

const int shuffle_16[16]
static
Initial value:
= {
0, 5, 11, 14, 2, 7, 9, 13, 1, 4, 10, 15, 3, 6, 8, 12
}

Definition at line 428 of file hqx.c.

Referenced by decode_slice().

AVCodec ff_hqx_decoder
Initial value:
= {
.name = "hqx",
.long_name = NULL_IF_CONFIG_SMALL("Canopus HQX"),
.type = AVMEDIA_TYPE_VIDEO,
.id = AV_CODEC_ID_HQX,
.priv_data_size = sizeof(HQXContext),
.init = hqx_decode_init,
.decode = hqx_decode_frame,
.close = hqx_decode_close,
.capabilities = CODEC_CAP_DR1,
}

Definition at line 633 of file hqx.c.

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