ivi.h File Reference

This file contains structures and macros shared by both Indeo4 and Indeo5 decoders. More...

#include "avcodec.h"
#include "get_bits.h"
#include <stdint.h>

Go to the source code of this file.

Classes
struct	IVIHuffDesc
	huffman codebook descriptor More...
struct	IVIHuffTab
	macroblock/block huffman table descriptor More...
struct	RVMapDesc
	run-value (RLE) table descriptor More...
struct	IVIMbInfo
	information for Indeo macroblock (16x16, 8x8 or 4x4) More...
struct	IVITile
	information for Indeo tile More...
struct	IVIBandDesc
	information for Indeo wavelet band More...
struct	IVIPlaneDesc
	color plane (luma or chroma) information More...
struct	IVIPicConfig
struct	IVI45DecContext

Macros
#define	IVI_VLC_BITS   13
	max number of bits of the ivi's huffman codes
#define	IVI5_IS_PROTECTED   0x20
#define	IVI_NUM_TILES(stride, tile_size)   (((stride) + (tile_size) - 1) / (tile_size))
	calculate number of tiles in a stride
#define	IVI_MBs_PER_TILE(tile_width, tile_height, mb_size)   ((((tile_width) + (mb_size) - 1) / (mb_size)) * (((tile_height) + (mb_size) - 1) / (mb_size)))
	calculate number of macroblocks in a tile
#define	IVI_TOSIGNED(val)   (-(((val) >> 1) ^ -((val) & 1)))
	convert unsigned values into signed ones (the sign is in the LSB)

Typedefs
typedef struct IVIHuffDesc	IVIHuffDesc
	huffman codebook descriptor
typedef struct IVIHuffTab	IVIHuffTab
	macroblock/block huffman table descriptor
typedef void(	InvTransformPtr) (const int32_t *in, int16_t *out, ptrdiff_t pitch, const uint8_t *flags)
	Declare inverse transform function types.
typedef void(	DCTransformPtr) (const int32_t *in, int16_t *out, ptrdiff_t pitch, int blk_size)
typedef struct RVMapDesc	RVMapDesc
	run-value (RLE) table descriptor
typedef struct IVIMbInfo	IVIMbInfo
	information for Indeo macroblock (16x16, 8x8 or 4x4)
typedef struct IVITile	IVITile
	information for Indeo tile
typedef struct IVIBandDesc	IVIBandDesc
	information for Indeo wavelet band
typedef struct IVIPlaneDesc	IVIPlaneDesc
	color plane (luma or chroma) information
typedef struct IVIPicConfig	IVIPicConfig
typedef struct IVI45DecContext	IVI45DecContext

Enumerations
enum	{   IVI4_FRAMETYPE_INTRA = 0, IVI4_FRAMETYPE_INTRA1 = 1, IVI4_FRAMETYPE_INTER = 2, IVI4_FRAMETYPE_BIDIR = 3,   IVI4_FRAMETYPE_INTER_NOREF = 4, IVI4_FRAMETYPE_NULL_FIRST = 5, IVI4_FRAMETYPE_NULL_LAST = 6 }
	Indeo 4 frame types. More...
enum	{ IVI_MB_HUFF = 0, IVI_BLK_HUFF = 1 }

Functions
void	ff_ivi_init_static_vlc (void)
	Initialize static codes used for macroblock and block decoding.
int	ff_ivi_dec_huff_desc (GetBitContext *gb, int desc_coded, int which_tab, IVIHuffTab *huff_tab, AVCodecContext *avctx)
	Decode a huffman codebook descriptor from the bitstream and select specified huffman table. More...
int	ff_ivi_init_planes (AVCodecContext *avctx, IVIPlaneDesc *planes, const IVIPicConfig *cfg, int is_indeo4)
	Initialize planes (prepares descriptors, allocates buffers etc). More...
int	ff_ivi_init_tiles (IVIPlaneDesc *planes, int tile_width, int tile_height)
	Initialize tile and macroblock descriptors. More...
int	ff_ivi_decode_frame (AVCodecContext *avctx, void *data, int *got_frame, AVPacket *avpkt)
int	ff_ivi_decode_close (AVCodecContext *avctx)
	Close Indeo5 decoder and clean up its context.

Variables
const uint8_t	ff_ivi_vertical_scan_8x8 [64]
	Common scan patterns (defined in ivi_common.c) More...
const uint8_t	ff_ivi_horizontal_scan_8x8 [64]
const uint8_t	ff_ivi_direct_scan_4x4 [16]
const RVMapDesc	ff_ivi_rvmap_tabs [9]
	Run-value (RLE) tables.

Detailed Description

This file contains structures and macros shared by both Indeo4 and Indeo5 decoders.

Enumeration Type Documentation

anonymous enum

anonymous enum

Indeo 4 frame types.

Enumerator
IVI4_FRAMETYPE_INTRA1	intra frame with slightly different bitstream coding
IVI4_FRAMETYPE_INTER	non-droppable P-frame
IVI4_FRAMETYPE_BIDIR	bidirectional frame
IVI4_FRAMETYPE_INTER_NOREF	droppable P-frame
IVI4_FRAMETYPE_NULL_FIRST	empty frame with no data
IVI4_FRAMETYPE_NULL_LAST	empty frame with no data

anonymous enum

anonymous enum

Enumerator
IVI_BLK_HUFF	Huffman table is used for coding macroblocks.

Function Documentation

ff_ivi_dec_huff_desc()

int ff_ivi_dec_huff_desc	(	GetBitContext *	gb,
		int	desc_coded,
		int	which_tab,
		IVIHuffTab *	huff_tab,
		AVCodecContext *	avctx
	)

Decode a huffman codebook descriptor from the bitstream and select specified huffman table.

Parameters

[in,out]	gb	the GetBit context
[in]	desc_coded	flag signalling if table descriptor was coded
[in]	which_tab	codebook purpose (IVI_MB_HUFF or IVI_BLK_HUFF)
[out]	huff_tab	pointer to the descriptor of the selected table
[in]	avctx	AVCodecContext pointer

Returns

zero on success, negative value otherwise

ff_ivi_init_planes()

int ff_ivi_init_planes	(	AVCodecContext *	avctx,
		IVIPlaneDesc *	planes,
		const IVIPicConfig *	cfg,
		int	is_indeo4
	)

Initialize planes (prepares descriptors, allocates buffers etc).

Parameters

[in,out]	planes	pointer to the array of the plane descriptors
[in]	cfg	pointer to the ivi_pic_config structure describing picture layout
[in]	is_indeo4	flag signalling if it is Indeo 4 or not

Returns

result code: 0 - OK

ff_ivi_init_tiles()

int ff_ivi_init_tiles	(	IVIPlaneDesc *	planes,
		int	tile_width,
		int	tile_height
	)

Initialize tile and macroblock descriptors.

Parameters

[in,out]	planes	pointer to the array of the plane descriptors
[in]	tile_width	tile width
[in]	tile_height	tile height

Returns

result code: 0 - OK

Variable Documentation

ff_ivi_vertical_scan_8x8

const uint8_t ff_ivi_vertical_scan_8x8[64]

Common scan patterns (defined in ivi_common.c)

Common scan patterns (defined in ivi_common.c)