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Data Structures | Macros | Typedefs | Enumerations | Functions | Variables
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.

Data Structures

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 More...
 
#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 More...
 
#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 More...
 
#define IVI_TOSIGNED(val)   (-(((val) >> 1) ^ -((val) & 1)))
 convert unsigned values into signed ones (the sign is in the LSB) More...
 

Typedefs

typedef voidInvTransformPtr) (const int32_t *in, int16_t *out, ptrdiff_t pitch, const uint8_t *flags)
 Declare inverse transform function types. More...
 
typedef voidDCTransformPtr) (const int32_t *in, int16_t *out, ptrdiff_t pitch, int blk_size)
 

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

static int ivi_pic_config_cmp (IVIPicConfig *str1, IVIPicConfig *str2)
 compare some properties of two pictures More...
 
static int ivi_scale_mv (int mv, int mv_scale)
 scale motion vector More...
 
void ff_ivi_init_static_vlc (void)
 Initialize static codes used for macroblock and block decoding. More...
 
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. More...
 

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. More...
 

Detailed Description

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

Definition in file ivi.h.

Macro Definition Documentation

#define IVI_VLC_BITS   13

max number of bits of the ivi's huffman codes

Definition at line 49 of file ivi.h.

Referenced by decode_mb_info(), ivi_create_huff_from_desc(), and ivi_decode_coded_blocks().

#define IVI5_IS_PROTECTED   0x20

Definition at line 50 of file ivi.h.

Referenced by decode_gop_header(), and ff_ivi_decode_frame().

#define IVI_NUM_TILES (   stride,
  tile_size 
)    (((stride) + (tile_size) - 1) / (tile_size))

calculate number of tiles in a stride

Definition at line 283 of file ivi.h.

Referenced by ff_ivi_init_tiles().

#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

Definition at line 286 of file ivi.h.

Referenced by decode_mb_info(), ivi_init_tiles(), and ivi_process_empty_tile().

#define IVI_TOSIGNED (   val)    (-(((val) >> 1) ^ -((val) & 1)))

convert unsigned values into signed ones (the sign is in the LSB)

Definition at line 290 of file ivi.h.

Referenced by decode_mb_info(), and ivi_decode_coded_blocks().

Typedef Documentation

typedef void( InvTransformPtr) (const int32_t *in, int16_t *out, ptrdiff_t pitch, const uint8_t *flags)

Declare inverse transform function types.

Definition at line 90 of file ivi.h.

typedef void( DCTransformPtr) (const int32_t *in, int16_t *out, ptrdiff_t pitch, int blk_size)

Definition at line 91 of file ivi.h.

Enumeration Type Documentation

anonymous enum

Indeo 4 frame types.

Enumerator
IVI4_FRAMETYPE_INTRA 
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

Definition at line 39 of file ivi.h.

anonymous enum
Enumerator
IVI_MB_HUFF 
IVI_BLK_HUFF 

Huffman table is used for coding macroblocks.

Definition at line 73 of file ivi.h.

Function Documentation

static int ivi_pic_config_cmp ( IVIPicConfig str1,
IVIPicConfig str2 
)
inlinestatic

compare some properties of two pictures

Definition at line 274 of file ivi.h.

Referenced by decode_gop_header(), and decode_pic_hdr().

static int ivi_scale_mv ( int  mv,
int  mv_scale 
)
inlinestatic

scale motion vector

Definition at line 293 of file ivi.h.

Referenced by decode_mb_info(), and ivi_process_empty_tile().

void ff_ivi_init_static_vlc ( void  )

Initialize static codes used for macroblock and block decoding.

Definition at line 179 of file ivi.c.

Referenced by decode_init(), and ivi_scale_mv().

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]gbthe GetBit context
[in]desc_codedflag signalling if table descriptor was coded
[in]which_tabcodebook purpose (IVI_MB_HUFF or IVI_BLK_HUFF)
[out]huff_tabpointer to the descriptor of the selected table
[in]avctxAVCodecContext pointer
Returns
zero on success, negative value otherwise

Definition at line 226 of file ivi.c.

Referenced by decode_band_hdr(), decode_pic_hdr(), and ivi_scale_mv().

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]planespointer to the array of the plane descriptors
[in]cfgpointer to the ivi_pic_config structure describing picture layout
[in]is_indeo4flag signalling if it is Indeo 4 or not
Returns
result code: 0 - OK

Definition at line 305 of file ivi.c.

Referenced by decode_gop_header(), decode_init(), decode_pic_hdr(), and ivi_scale_mv().

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

Initialize tile and macroblock descriptors.

Parameters
[in,out]planespointer to the array of the plane descriptors
[in]tile_widthtile width
[in]tile_heighttile height
Returns
result code: 0 - OK

Definition at line 409 of file ivi.c.

Referenced by decode_gop_header(), decode_pic_hdr(), and ivi_scale_mv().

int ff_ivi_decode_frame ( AVCodecContext avctx,
void data,
int got_frame,
AVPacket avpkt 
)

Definition at line 1080 of file ivi.c.

Referenced by ff_ivi_decode_frame(), and ivi_scale_mv().

int ff_ivi_decode_close ( AVCodecContext avctx)

Close Indeo5 decoder and clean up its context.

Definition at line 1226 of file ivi.c.

Referenced by ivi_scale_mv().

Variable Documentation

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)

Definition at line 1247 of file ivi.c.

Referenced by decode_gop_header().

const uint8_t ff_ivi_horizontal_scan_8x8[64]

Definition at line 1258 of file ivi.c.

Referenced by decode_gop_header().

const uint8_t ff_ivi_direct_scan_4x4[16]

Definition at line 1269 of file ivi.c.

Referenced by decode_gop_header().

const RVMapDesc ff_ivi_rvmap_tabs[9]

Run-value (RLE) tables.

Definition at line 1277 of file ivi.c.

Referenced by decode_init().