FFmpeg
 All Data Structures Namespaces Files Functions Variables Typedefs Enumerations Enumerator Macros Groups Pages
Macros | Enumerations | Functions | Variables
indeo5.c File Reference

Indeo Video Interactive version 5 decoder. More...

#include "avcodec.h"
#include "get_bits.h"
#include "dsputil.h"
#include "ivi_dsp.h"
#include "ivi_common.h"
#include "indeo5data.h"

Go to the source code of this file.

Macros

#define BITSTREAM_READER_LE
 
#define IVI5_PIC_SIZE_ESC   15
 

Enumerations

enum  {
  FRAMETYPE_INTRA = 0, FRAMETYPE_INTER = 1, FRAMETYPE_INTER_SCAL = 2, FRAMETYPE_INTER_NOREF = 3,
  FRAMETYPE_NULL = 4
}
 Indeo5 frame types. More...
 

Functions

static int decode_gop_header (IVI45DecContext *ctx, AVCodecContext *avctx)
 Decode Indeo5 GOP (Group of pictures) header.
 
static void skip_hdr_extension (GetBitContext *gb)
 Skip a header extension.
 
static int decode_pic_hdr (IVI45DecContext *ctx, AVCodecContext *avctx)
 Decode Indeo5 picture header.
 
static int decode_band_hdr (IVI45DecContext *ctx, IVIBandDesc *band, AVCodecContext *avctx)
 Decode Indeo5 band header.
 
static int decode_mb_info (IVI45DecContext *ctx, IVIBandDesc *band, IVITile *tile, AVCodecContext *avctx)
 Decode info (block type, cbp, quant delta, motion vector) for all macroblocks in the current tile.
 
static void switch_buffers (IVI45DecContext *ctx)
 Switch buffers.
 
static int is_nonnull_frame (IVI45DecContext *ctx)
 
static av_cold int decode_init (AVCodecContext *avctx)
 Initialize Indeo5 decoder.
 

Variables

AVCodec ff_indeo5_decoder
 

Detailed Description

Indeo Video Interactive version 5 decoder.

Indeo5 data is usually transported within .avi or .mov files. Known FOURCCs: 'IV50'

Definition in file indeo5.c.

Macro Definition Documentation

#define BITSTREAM_READER_LE

Definition at line 30 of file indeo5.c.

#define IVI5_PIC_SIZE_ESC   15

Definition at line 49 of file indeo5.c.

Referenced by decode_gop_header().

Enumeration Type Documentation

anonymous enum

Indeo5 frame types.

Enumerator:
FRAMETYPE_INTRA 
FRAMETYPE_INTER 

non-droppable P-frame

FRAMETYPE_INTER_SCAL 

droppable P-frame used in the scalability mode

FRAMETYPE_INTER_NOREF 

droppable P-frame

FRAMETYPE_NULL 

empty frame with no data

Definition at line 41 of file indeo5.c.

Function Documentation

static int decode_gop_header ( IVI45DecContext ctx,
AVCodecContext avctx 
)
static

Decode Indeo5 GOP (Group of pictures) header.

This header is present in key frames only. It defines parameters for all frames in a GOP.

Parameters
[in,out]ctxptr to the decoder context
[in]avctxptr to the AVCodecContext
Returns
result code: 0 = OK, -1 = error

Definition at line 60 of file indeo5.c.

Referenced by decode_pic_hdr().

static void skip_hdr_extension ( GetBitContext gb)
inlinestatic

Skip a header extension.

Parameters
[in,out]gbthe GetBit context

Definition at line 293 of file indeo5.c.

Referenced by decode_band_hdr(), and decode_pic_hdr().

static int decode_pic_hdr ( IVI45DecContext ctx,
AVCodecContext avctx 
)
static

Decode Indeo5 picture header.

Parameters
[in,out]ctxptr to the decoder context
[in]avctxptr to the AVCodecContext
Returns
result code: 0 = OK, -1 = error

Definition at line 311 of file indeo5.c.

Referenced by decode_init().

static int decode_band_hdr ( IVI45DecContext ctx,
IVIBandDesc band,
AVCodecContext avctx 
)
static

Decode Indeo5 band header.

Parameters
[in,out]ctxptr to the decoder context
[in,out]bandptr to the band descriptor
[in]avctxptr to the AVCodecContext
Returns
result code: 0 = OK, -1 = error

Definition at line 378 of file indeo5.c.

Referenced by decode_init().

static int decode_mb_info ( IVI45DecContext ctx,
IVIBandDesc band,
IVITile tile,
AVCodecContext avctx 
)
static

Decode info (block type, cbp, quant delta, motion vector) for all macroblocks in the current tile.

Parameters
[in,out]ctxptr to the decoder context
[in,out]bandptr to the band descriptor
[in,out]tileptr to the tile descriptor
[in]avctxptr to the AVCodecContext
Returns
result code: 0 = OK, -1 = error

Definition at line 450 of file indeo5.c.

Referenced by decode_init().

static void switch_buffers ( IVI45DecContext ctx)
static

Switch buffers.

Parameters
[in,out]ctxptr to the decoder context

Definition at line 589 of file indeo5.c.

Referenced by decode_init().

static int is_nonnull_frame ( IVI45DecContext ctx)
static

Definition at line 627 of file indeo5.c.

Referenced by decode_init().

static av_cold int decode_init ( AVCodecContext avctx)
static

Initialize Indeo5 decoder.

Definition at line 636 of file indeo5.c.

Variable Documentation

AVCodec ff_indeo5_decoder
Initial value:
= {
.name = "indeo5",
.long_name = NULL_IF_CONFIG_SMALL("Intel Indeo Video Interactive 5"),
.priv_data_size = sizeof(IVI45DecContext),
.capabilities = CODEC_CAP_DR1,
}

Definition at line 677 of file indeo5.c.