jpeg2000dec.c File Reference

JPEG 2000 image decoder. More...

#include "libavutil/avassert.h"
#include "libavutil/common.h"
#include "libavutil/opt.h"
#include "avcodec.h"
#include "bytestream.h"
#include "internal.h"
#include "thread.h"
#include "jpeg2000.h"

Go to the source code of this file.

Data Structures
struct	Jpeg2000TilePart
struct	Jpeg2000Tile
struct	Jpeg2000DecoderContext

Macros
#define	JP2_SIG_TYPE   0x6A502020
#define	JP2_SIG_VALUE   0x0D0A870A
#define	JP2_CODESTREAM   0x6A703263
#define	HAD_COC   0x01
#define	HAD_QCC   0x02
#define	OFFSET(x)   offsetof(Jpeg2000DecoderContext, x)
#define	VD   AV_OPT_FLAG_VIDEO_PARAM | AV_OPT_FLAG_DECODING_PARAM

Functions
static int	get_bits (Jpeg2000DecoderContext *s, int n)
static void	jpeg2000_flush (Jpeg2000DecoderContext *s)
static int	tag_tree_decode (Jpeg2000DecoderContext *s, Jpeg2000TgtNode *node, int threshold)
static int	get_siz (Jpeg2000DecoderContext *s)
static int	get_cox (Jpeg2000DecoderContext *s, Jpeg2000CodingStyle *c)
static int	get_cod (Jpeg2000DecoderContext *s, Jpeg2000CodingStyle *c, uint8_t *properties)
static int	get_coc (Jpeg2000DecoderContext *s, Jpeg2000CodingStyle *c, uint8_t *properties)
static int	get_qcx (Jpeg2000DecoderContext *s, int n, Jpeg2000QuantStyle *q)
static int	get_qcd (Jpeg2000DecoderContext *s, int n, Jpeg2000QuantStyle *q, uint8_t *properties)
static int	get_qcc (Jpeg2000DecoderContext *s, int n, Jpeg2000QuantStyle *q, uint8_t *properties)
static int	get_sot (Jpeg2000DecoderContext *s, int n)
static uint8_t	get_tlm (Jpeg2000DecoderContext *s, int n)
static int	init_tile (Jpeg2000DecoderContext *s, int tileno)
static int	getnpasses (Jpeg2000DecoderContext *s)
static int	getlblockinc (Jpeg2000DecoderContext *s)
static int	jpeg2000_decode_packet (Jpeg2000DecoderContext *s, Jpeg2000CodingStyle *codsty, Jpeg2000ResLevel *rlevel, int precno, int layno, uint8_t *expn, int numgbits)
static int	jpeg2000_decode_packets (Jpeg2000DecoderContext *s, Jpeg2000Tile *tile)
static void	decode_sigpass (Jpeg2000T1Context *t1, int width, int height, int bpno, int bandno, int bpass_csty_symbol, int vert_causal_ctx_csty_symbol)
static void	decode_refpass (Jpeg2000T1Context *t1, int width, int height, int bpno)
static void	decode_clnpass (Jpeg2000DecoderContext *s, Jpeg2000T1Context *t1, int width, int height, int bpno, int bandno, int seg_symbols, int vert_causal_ctx_csty_symbol)
static int	decode_cblk (Jpeg2000DecoderContext *s, Jpeg2000CodingStyle *codsty, Jpeg2000T1Context *t1, Jpeg2000Cblk *cblk, int width, int height, int bandpos)
static void	dequantization_float (int x, int y, Jpeg2000Cblk *cblk, Jpeg2000Component *comp, Jpeg2000T1Context *t1, Jpeg2000Band *band)
static void	dequantization_int (int x, int y, Jpeg2000Cblk *cblk, Jpeg2000Component *comp, Jpeg2000T1Context *t1, Jpeg2000Band *band)
static void	mct_decode (Jpeg2000DecoderContext *s, Jpeg2000Tile *tile)
static int	jpeg2000_decode_tile (Jpeg2000DecoderContext *s, Jpeg2000Tile *tile, AVFrame *picture)
static void	jpeg2000_dec_cleanup (Jpeg2000DecoderContext *s)
static int	jpeg2000_read_main_headers (Jpeg2000DecoderContext *s)
static int	jpeg2000_read_bitstream_packets (Jpeg2000DecoderContext *s)
static int	jp2_find_codestream (Jpeg2000DecoderContext *s)
static int	jpeg2000_decode_frame (AVCodecContext *avctx, void *data, int *got_frame, AVPacket *avpkt)
static void	jpeg2000_init_static_data (AVCodec *codec)

Variables
static const float	f_ict_params [4]
static const int	i_ict_params [4]
static const AVOption	options []
static const AVProfile	profiles []
static const AVClass	jpeg2000_class
AVCodec	ff_jpeg2000_decoder

Detailed Description

JPEG 2000 image decoder.

Definition in file jpeg2000dec.c.

Macro Definition Documentation

#define JP2_SIG_TYPE   0x6A502020

Definition at line 37 of file jpeg2000dec.c.

Referenced by jpeg2000_decode_frame().

#define JP2_SIG_VALUE   0x0D0A870A

Definition at line 38 of file jpeg2000dec.c.

Referenced by jpeg2000_decode_frame().

#define JP2_CODESTREAM   0x6A703263

Definition at line 39 of file jpeg2000dec.c.

Referenced by jp2_find_codestream().

#define HAD_COC   0x01

Definition at line 41 of file jpeg2000dec.c.

Referenced by get_coc(), and get_cod().

#define HAD_QCC   0x02

Definition at line 42 of file jpeg2000dec.c.

Referenced by get_qcc(), and get_qcd().

#define OFFSET

(

x

)

offsetof(Jpeg2000DecoderContext, x)

Definition at line 1471 of file jpeg2000dec.c.

#define VD   AV_OPT_FLAG_VIDEO_PARAM | AV_OPT_FLAG_DECODING_PARAM

Definition at line 1472 of file jpeg2000dec.c.

Function Documentation

static int get_bits ( Jpeg2000DecoderContext *  s, int  n  )

static

Definition at line 96 of file jpeg2000dec.c.

Referenced by getlblockinc(), getnpasses(), jpeg2000_decode_packet(), and tag_tree_decode().

static void jpeg2000_flush ( Jpeg2000DecoderContext *  s )

static

Definition at line 111 of file jpeg2000dec.c.

Referenced by jpeg2000_decode_packet().

static int tag_tree_decode ( Jpeg2000DecoderContext *  s, Jpeg2000TgtNode *  node, int  threshold  )

static

Definition at line 119 of file jpeg2000dec.c.

Referenced by jpeg2000_decode_packet().

static int get_siz ( Jpeg2000DecoderContext *  s )

static

Definition at line 159 of file jpeg2000dec.c.

Referenced by jpeg2000_read_main_headers().

static int get_cox ( Jpeg2000DecoderContext *  s, Jpeg2000CodingStyle *  c  )

static

Definition at line 279 of file jpeg2000dec.c.

Referenced by get_coc(), and get_cod().

static int get_cod ( Jpeg2000DecoderContext *  s, Jpeg2000CodingStyle *  c, uint8_t *  properties  )

static

Definition at line 333 of file jpeg2000dec.c.

Referenced by jpeg2000_read_main_headers().

static int get_coc ( Jpeg2000DecoderContext *  s, Jpeg2000CodingStyle *  c, uint8_t *  properties  )

static

Definition at line 368 of file jpeg2000dec.c.

Referenced by jpeg2000_read_main_headers().

static int get_qcx ( Jpeg2000DecoderContext *  s, int  n, Jpeg2000QuantStyle *  q  )

static

Definition at line 396 of file jpeg2000dec.c.

Referenced by get_qcc(), and get_qcd().

static int get_qcd ( Jpeg2000DecoderContext *  s, int  n, Jpeg2000QuantStyle *  q, uint8_t *  properties  )

static

Definition at line 441 of file jpeg2000dec.c.

Referenced by jpeg2000_read_main_headers().

static int get_qcc ( Jpeg2000DecoderContext *  s, int  n, Jpeg2000QuantStyle *  q, uint8_t *  properties  )

static

Definition at line 457 of file jpeg2000dec.c.

Referenced by jpeg2000_read_main_headers().

static int get_sot ( Jpeg2000DecoderContext *  s, int  n  )

static

Definition at line 479 of file jpeg2000dec.c.

Referenced by jpeg2000_read_main_headers().

static uint8_t get_tlm ( Jpeg2000DecoderContext *  s, int  n  )

static

Definition at line 535 of file jpeg2000dec.c.

Referenced by jpeg2000_read_main_headers().

static int init_tile ( Jpeg2000DecoderContext *  s, int  tileno  )

static

Definition at line 569 of file jpeg2000dec.c.

Referenced by jpeg2000_read_bitstream_packets().

static int getnpasses ( Jpeg2000DecoderContext *  s )

static

Definition at line 604 of file jpeg2000dec.c.

Referenced by jpeg2000_decode_packet().

static int getlblockinc ( Jpeg2000DecoderContext *  s )

static

Definition at line 619 of file jpeg2000dec.c.

Referenced by jpeg2000_decode_packet().

static int jpeg2000_decode_packet ( Jpeg2000DecoderContext *  s, Jpeg2000CodingStyle *  codsty, Jpeg2000ResLevel *  rlevel, int  precno, int  layno, uint8_t *  expn, int  numgbits  )

static

Definition at line 630 of file jpeg2000dec.c.

Referenced by jpeg2000_decode_packets().

static int jpeg2000_decode_packets ( Jpeg2000DecoderContext *  s, Jpeg2000Tile *  tile  )

static

Definition at line 721 of file jpeg2000dec.c.

Referenced by jpeg2000_read_bitstream_packets().

static void decode_sigpass ( Jpeg2000T1Context *  t1, int  width, int  height, int  bpno, int  bandno, int  bpass_csty_symbol, int  vert_causal_ctx_csty_symbol  )

static

Definition at line 826 of file jpeg2000dec.c.

Referenced by decode_cblk().

static void decode_refpass ( Jpeg2000T1Context *  t1, int  width, int  height, int  bpno  )

static

Definition at line 856 of file jpeg2000dec.c.

Referenced by decode_cblk().

static void decode_clnpass ( Jpeg2000DecoderContext *  s, Jpeg2000T1Context *  t1, int  width, int  height, int  bpno, int  bandno, int  seg_symbols, int  vert_causal_ctx_csty_symbol  )

static

Definition at line 878 of file jpeg2000dec.c.

Referenced by decode_cblk().

static int decode_cblk ( Jpeg2000DecoderContext *  s, Jpeg2000CodingStyle *  codsty, Jpeg2000T1Context *  t1, Jpeg2000Cblk *  cblk, int  width, int  height, int  bandpos  )

static

Definition at line 941 of file jpeg2000dec.c.

Referenced by jpeg2000_decode_tile().

static void dequantization_float ( int  x, int  y, Jpeg2000Cblk *  cblk, Jpeg2000Component *  comp, Jpeg2000T1Context *  t1, Jpeg2000Band *  band  )

static

Definition at line 1002 of file jpeg2000dec.c.

Referenced by jpeg2000_decode_tile().

static void dequantization_int ( int  x, int  y, Jpeg2000Cblk *  cblk, Jpeg2000Component *  comp, Jpeg2000T1Context *  t1, Jpeg2000Band *  band  )

static

Definition at line 1017 of file jpeg2000dec.c.

Referenced by jpeg2000_decode_tile().

static void mct_decode ( Jpeg2000DecoderContext *  s, Jpeg2000Tile *  tile  )

static

Definition at line 1046 of file jpeg2000dec.c.

Referenced by jpeg2000_decode_tile().

static int jpeg2000_decode_tile ( Jpeg2000DecoderContext *  s, Jpeg2000Tile *  tile, AVFrame *  picture  )

static

Definition at line 1097 of file jpeg2000dec.c.

Referenced by jpeg2000_decode_frame().

static void jpeg2000_dec_cleanup ( Jpeg2000DecoderContext *  s )

static

Definition at line 1245 of file jpeg2000dec.c.

Referenced by jpeg2000_decode_frame().

static int jpeg2000_read_main_headers ( Jpeg2000DecoderContext *  s )

static

Definition at line 1261 of file jpeg2000dec.c.

Referenced by jpeg2000_decode_frame().

static int jpeg2000_read_bitstream_packets ( Jpeg2000DecoderContext *  s )

static

Definition at line 1358 of file jpeg2000dec.c.

Referenced by jpeg2000_decode_frame().

static int jp2_find_codestream ( Jpeg2000DecoderContext *  s )

static

Definition at line 1377 of file jpeg2000dec.c.

Referenced by jpeg2000_decode_frame().

static int jpeg2000_decode_frame ( AVCodecContext *  avctx, void *  data, int *  got_frame, AVPacket *  avpkt  )

static

Definition at line 1402 of file jpeg2000dec.c.

static void jpeg2000_init_static_data ( AVCodec *  codec )

static

Definition at line 1466 of file jpeg2000dec.c.

Variable Documentation

const float f_ict_params[4]

static

Initial value:

= {
    1.402f,
    0.34413f,
    0.71414f,
    1.772f
}

Definition at line 1033 of file jpeg2000dec.c.

Referenced by mct_decode().

const int i_ict_params[4]

static

Initial value:

= {
     91881,
     22553,
     46802,
    116130
}

Definition at line 1039 of file jpeg2000dec.c.

Referenced by mct_decode().

const AVOption options[]

static

Initial value:

= {
    { "lowres",  "Lower the decoding resolution by a power of two",
        OFFSET(reduction_factor), AV_OPT_TYPE_INT, { .i64 = 0 }, 0, JPEG2000_MAX_RESLEVELS - 1, VD },
    { NULL },
}

Definition at line 1474 of file jpeg2000dec.c.

const AVProfile profiles[]

static

Initial value:

= {
    { FF_PROFILE_JPEG2000_CSTREAM_RESTRICTION_0,  "JPEG 2000 codestream restriction 0"   },
    { FF_PROFILE_JPEG2000_CSTREAM_RESTRICTION_1,  "JPEG 2000 codestream restriction 1"   },
    { FF_PROFILE_JPEG2000_CSTREAM_NO_RESTRICTION, "JPEG 2000 no codestream restrictions" },
    { FF_PROFILE_JPEG2000_DCINEMA_2K,             "JPEG 2000 digital cinema 2K"          },
    { FF_PROFILE_JPEG2000_DCINEMA_4K,             "JPEG 2000 digital cinema 4K"          },
    { FF_PROFILE_UNKNOWN },
}

Definition at line 1480 of file jpeg2000dec.c.

const AVClass jpeg2000_class

static

Initial value:

= {
    .class_name = "jpeg2000",
    .item_name  = av_default_item_name,
    .option     = options,
    .version    = LIBAVUTIL_VERSION_INT,
}

Definition at line 1489 of file jpeg2000dec.c.

AVCodec ff_jpeg2000_decoder

Initial value:

= {
    .name             = "jpeg2000",
    .long_name        = NULL_IF_CONFIG_SMALL("JPEG 2000"),
    .type             = AVMEDIA_TYPE_VIDEO,
    .id               = AV_CODEC_ID_JPEG2000,
    .capabilities     = CODEC_CAP_FRAME_THREADS,
    .priv_data_size   = sizeof(Jpeg2000DecoderContext),
    .init_static_data = jpeg2000_init_static_data,
    .decode           = jpeg2000_decode_frame,
    .priv_class       = &jpeg2000_class,
    .max_lowres       = 5,
    .profiles         = NULL_IF_CONFIG_SMALL(profiles)
}

Definition at line 1496 of file jpeg2000dec.c.