libavcodec/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.

Defines
#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.

---

Define 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_band_hdr	(	IVI45DecContext *	ctx,
		IVIBandDesc *	band,
		AVCodecContext *	avctx
	)			[static]

Decode Indeo5 band header.

Parameters:

[in,out]	ctx	ptr to the decoder context
[in,out]	band	ptr to the band descriptor
[in]	avctx	ptr to the AVCodecContext

Returns:

result code: 0 = OK, -1 = error

Definition at line 352 of file indeo5.c.

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]	ctx	ptr to the decoder context
[in]	avctx	ptr to the AVCodecContext

Returns:

result code: 0 = OK, -1 = error

Definition at line 60 of file indeo5.c.

Referenced by decode_pic_hdr().

static av_cold int decode_init

(

AVCodecContext *

avctx

)

[static]

Initialize Indeo5 decoder.

Definition at line 599 of file indeo5.c.

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]	ctx	ptr to the decoder context
[in,out]	band	ptr to the band descriptor
[in,out]	tile	ptr to the tile descriptor
[in]	avctx	ptr to the AVCodecContext

Returns:

result code: 0 = OK, -1 = error

Definition at line 422 of file indeo5.c.

static int decode_pic_hdr	(	IVI45DecContext *	ctx,
		AVCodecContext *	avctx
	)			[static]

Decode Indeo5 picture header.

Parameters:

[in,out]	ctx	ptr to the decoder context
[in]	avctx	ptr to the AVCodecContext

Returns:

result code: 0 = OK, -1 = error

Definition at line 295 of file indeo5.c.

static int is_nonnull_frame

(

IVI45DecContext *

ctx

)

[static]

Definition at line 590 of file indeo5.c.

static void skip_hdr_extension

(

GetBitContext *

gb

)

[inline, static]

Skip a header extension.

Parameters:

[in,out]

gb

the GetBit context

Definition at line 277 of file indeo5.c.

Referenced by decode_band_hdr(), and decode_pic_hdr().

static void switch_buffers

(

IVI45DecContext *

ctx

)

[static]

Switch buffers.

Parameters:

[in,out]

ctx

ptr to the decoder context

Definition at line 552 of file indeo5.c.

---

Variable Documentation

AVCodec ff_indeo5_decoder

Initial value:

 {
    .name           = "indeo5",
    .type           = AVMEDIA_TYPE_VIDEO,
    .id             = CODEC_ID_INDEO5,
    .priv_data_size = sizeof(IVI45DecContext),
    .init           = decode_init,
    .close          = ff_ivi_decode_close,
    .decode         = ff_ivi_decode_frame,
    .long_name      = NULL_IF_CONFIG_SMALL("Intel Indeo Video Interactive 5"),
}

Definition at line 643 of file indeo5.c.