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indeo5.c File Reference

Indeo Video Interactive version 5 decoder. More...

#include "avcodec.h"
#include "get_bits.h"
#include "ivi.h"
#include "ivi_dsp.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. More...
 
static int skip_hdr_extension (GetBitContext *gb)
 Skip a header extension. More...
 
static int decode_pic_hdr (IVI45DecContext *ctx, AVCodecContext *avctx)
 Decode Indeo5 picture header. More...
 
static int decode_band_hdr (IVI45DecContext *ctx, IVIBandDesc *band, AVCodecContext *avctx)
 Decode Indeo5 band header. More...
 
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. More...
 
static void switch_buffers (IVI45DecContext *ctx)
 Switch buffers. More...
 
static int is_nonnull_frame (IVI45DecContext *ctx)
 
static av_cold int decode_init (AVCodecContext *avctx)
 Initialize Indeo5 decoder. More...
 

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 48 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 40 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 59 of file indeo5.c.

Referenced by decode_pic_hdr().

static int skip_hdr_extension ( GetBitContext gb)
inlinestatic

Skip a header extension.

Parameters
[in,out]gbthe GetBit context

Definition at line 292 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 314 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 381 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 453 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 592 of file indeo5.c.

Referenced by decode_init().

static int is_nonnull_frame ( IVI45DecContext ctx)
static

Definition at line 630 of file indeo5.c.

Referenced by decode_init().

static av_cold int decode_init ( AVCodecContext avctx)
static

Initialize Indeo5 decoder.

Definition at line 639 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 = AV_CODEC_CAP_DR1,
}
static av_cold int init(AVCodecContext *avctx)
Definition: avrndec.c:35
av_cold int ff_ivi_decode_close(AVCodecContext *avctx)
Close Indeo5 decoder and clean up its context.
Definition: ivi.c:1197
int ff_ivi_decode_frame(AVCodecContext *avctx, void *data, int *got_frame, AVPacket *avpkt)
Definition: ivi.c:1053
static av_cold int decode_init(AVCodecContext *avctx)
Initialize Indeo5 decoder.
Definition: indeo5.c:639
#define NULL_IF_CONFIG_SMALL(x)
Return NULL if CONFIG_SMALL is true, otherwise the argument without modification. ...
Definition: internal.h:176
static int decode(AVCodecContext *avctx, void *data, int *got_sub, AVPacket *avpkt)
Definition: ccaption_dec.c:722
#define AV_CODEC_CAP_DR1
Codec uses get_buffer() for allocating buffers and supports custom allocators.
Definition: avcodec.h:953

Definition at line 682 of file indeo5.c.