t2.h File Reference

Implementation of a tier-2 coding (packetization of code-block data) (T2). More...

Go to the source code of this file.

Data Structures
struct	opj_t2
	Tier-2 coding. More...

Typedefs
typedef struct opj_t2	opj_t2_t
	Tier-2 coding.

Functions
Exported functions
int	t2_encode_packets (opj_t2_t *t2, int tileno, opj_tcd_tile_t *tile, int maxlayers, unsigned char *dest, int len, opj_codestream_info_t *cstr_info, int tpnum, int tppos, int pino, J2K_T2_MODE t2_mode, int cur_totnum_tp)
	Encode the packets of a tile to a destination buffer.
int	t2_decode_packets (opj_t2_t *t2, unsigned char *src, int len, int tileno, opj_tcd_tile_t *tile, opj_codestream_info_t *cstr_info)
	Decode the packets of a tile from a source buffer.
opj_t2_t *	t2_create (opj_common_ptr cinfo, opj_image_t *image, opj_cp_t *cp)
	Create a T2 handle.
void	t2_destroy (opj_t2_t *t2)
	Destroy a T2 handle.

Detailed Description

Implementation of a tier-2 coding (packetization of code-block data) (T2).

Typedef Documentation

opj_t2_t

typedef struct opj_t2 opj_t2_t

Tier-2 coding.

Function Documentation

t2_create()

opj_t2_t * t2_create	(	opj_common_ptr	cinfo,
		opj_image_t *	image,
		opj_cp_t *	cp )

Create a T2 handle.

Parameters

cinfo	Codec context info
image	Source or destination image
cp	Image coding parameters

Returns

Returns a new T2 handle if successful, returns NULL otherwise

References opj_t2::cinfo, opj_t2::cp, opj_t2::image, and opj_malloc.

Referenced by tcd_decode_tile(), tcd_encode_tile(), and tcd_rateallocate().

t2_decode_packets()

int t2_decode_packets	(	opj_t2_t *	t2,
		unsigned char *	src,
		int	len,
		int	tileno,
		opj_tcd_tile_t *	tile,
		opj_codestream_info_t *	cstr_info )

Decode the packets of a tile from a source buffer.

Parameters

t2	T2 handle
src	the source buffer
len	length of the source buffer
tileno	number that identifies the tile for which to decode the packets
tile	tile for which to decode the packets
cstr_info	Codestream information structure

References opj_pi_iterator::compno, opj_image::comps, opj_t2::cp, opj_tile_info::end_header, opj_packet_info::end_ph_pos, opj_packet_info::end_pos, opj_t2::image, int_max(), opj_cp::layer, opj_pi_iterator::layno, opj_tcp::numpocs, opj_tile_info::packet, opj_codestream_info::packno, pi_create_decode(), pi_destroy(), pi_next(), opj_image_comp::resno_decoded, opj_packet_info::start_pos, t2_decode_packet(), opj_cp::tcps, opj_codestream_info::tile, opj_tile_info::tp, opj_tp_info::tp_end_header, opj_tp_info::tp_end_pos, opj_tp_info::tp_numpacks, opj_cp::tp_on, and opj_tp_info::tp_start_pack.

Referenced by tcd_decode_tile().

t2_destroy()

void t2_destroy

(

opj_t2_t *

t2

)

Destroy a T2 handle.

Parameters

t2	T2 handle to destroy

References opj_free.

Referenced by tcd_decode_tile(), tcd_encode_tile(), and tcd_rateallocate().

t2_encode_packets()

int t2_encode_packets	(	opj_t2_t *	t2,
		int	tileno,
		opj_tcd_tile_t *	tile,
		int	maxlayers,
		unsigned char *	dest,
		int	len,
		opj_codestream_info_t *	cstr_info,
		int	tpnum,
		int	tppos,
		int	pino,
		J2K_T2_MODE	t2_mode,
		int	cur_totnum_tp )

Encode the packets of a tile to a destination buffer.

Parameters

t2	T2 handle
tileno	number of the tile encoded
tile	the tile for which to write the packets
maxlayers	maximum number of layers
dest	the destination buffer
len	the length of the destination buffer
cstr_info	Codestream information structure
tpnum	Tile part number of the current tile
tppos	The position of the tile part flag in the progression order
pino
t2_mode	If == 0 In Threshold calculation ,If == 1 Final pass
cur_totnum_tp	The total number of tile parts in the current tile

References opj_cp::cinema, CINEMA4K_24, opj_t2::cinfo, opj_t2::cp, opj_tile_info::end_header, opj_packet_info::end_ph_pos, opj_packet_info::end_pos, EVT_ERROR, opj_t2::image, opj_codestream_info::index_write, opj_cp::max_comp_size, opj_image::numcomps, opj_event_msg(), opj_tile_info::packet, opj_codestream_info::packno, opj_tcd_tile::packno, pi_create_encode(), pi_destroy(), pi_initialise_encode(), pi_next(), opj_tcp::POC, opj_packet_info::start_pos, t2_encode_packet(), opj_cp::tcps, THRESH_CALC, opj_codestream_info::tile, and opj_cp::tp_on.

Referenced by tcd_encode_tile(), and tcd_rateallocate().