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.

Data Structures

struct IVI5DecContext

Defines

#define ALT_BITSTREAM_READER_LE

#define IVI5_PIC_SIZE_ESC   15

#define IVI5_IS_PROTECTED   0x20

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 (IVI5DecContext *ctx, AVCodecContext *avctx)

Decodes Indeo5 GOP (Group of pictures) header.

static void skip_hdr_extension (GetBitContext *gb)

Skips a header extension.

static int decode_pic_hdr (IVI5DecContext *ctx, AVCodecContext *avctx)

Decodes Indeo5 picture header.

static int decode_band_hdr (IVI5DecContext *ctx, IVIBandDesc *band, AVCodecContext *avctx)

Decodes Indeo5 band header.

static int decode_mb_info (IVI5DecContext *ctx, IVIBandDesc *band, IVITile *tile, AVCodecContext *avctx)

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

static int decode_band (IVI5DecContext *ctx, int plane_num, IVIBandDesc *band, AVCodecContext *avctx)

Decodes an Indeo5 band.

static void switch_buffers (IVI5DecContext *ctx, AVCodecContext *avctx)

Switches buffers.

static av_cold int decode_init (AVCodecContext *avctx)

Initializes Indeo5 decoder.

static int decode_frame (AVCodecContext *avctx, void *data, int *data_size, AVPacket *avpkt)

main decoder function

static av_cold int decode_close (AVCodecContext *avctx)

Closes Indeo5 decoder and cleans up its context.

Variables

AVCodec 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 ALT_BITSTREAM_READER_LE

Definition at line 30 of file indeo5.c.

#define IVI5_IS_PROTECTED 0x20

Definition at line 51 of file indeo5.c.

Referenced by decode_frame(), and decode_gop_header().

#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	(	IVI5DecContext *	ctx,
		int	plane_num,
		IVIBandDesc *	band,
		AVCodecContext *	avctx
	)			`[static]`

Decodes an Indeo5 band.

Parameters:

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

Returns:: result code: 0 = OK, -1 = error

Definition at line 551 of file indeo5.c.

Referenced by decode_frame().

static int decode_band_hdr	(	IVI5DecContext *	ctx,
		IVIBandDesc *	band,
		AVCodecContext *	avctx
	)			`[static]`

Decodes Indeo5 band header.

Parameters:

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

Returns:: result code: 0 = OK, -1 = error

Definition at line 358 of file indeo5.c.

Referenced by decode_band().

static av_cold int decode_close ( AVCodecContext * avctx ) [static]

Closes Indeo5 decoder and cleans up its context.

Definition at line 802 of file indeo5.c.

static int decode_frame	(	AVCodecContext *	avctx,
		void *	data,
		int *	data_size,
		AVPacket *	avpkt
	)			`[static]`

main decoder function

Definition at line 731 of file indeo5.c.

static int decode_gop_header	(	IVI5DecContext *	ctx,
		AVCodecContext *	avctx
	)			`[static]`

Decodes Indeo5 GOP (Group of pictures) header.

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

Parameters:

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

Returns:: result code: 0 = OK, -1 = error

Definition at line 91 of file indeo5.c.

Referenced by decode_pic_hdr().

static av_cold int decode_init ( AVCodecContext * avctx ) [static]

Initializes Indeo5 decoder.

Definition at line 692 of file indeo5.c.

static int decode_mb_info	(	IVI5DecContext *	ctx,
		IVIBandDesc *	band,
		IVITile *	tile,
		AVCodecContext *	avctx
	)			`[static]`

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

Parameters:

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

Returns:: result code: 0 = OK, -1 = error

Definition at line 428 of file indeo5.c.

Referenced by decode_band().

static int decode_pic_hdr	(	IVI5DecContext *	ctx,
		AVCodecContext *	avctx
	)			`[static]`

Decodes Indeo5 picture header.

Parameters:

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

Returns:: result code: 0 = OK, -1 = error

Definition at line 305 of file indeo5.c.

Referenced by decode_frame().

static void skip_hdr_extension ( GetBitContext * gb ) [inline, static]

Skips a header extension.

Parameters:

gb

[in,out] the GetBit context

Definition at line 287 of file indeo5.c.

Referenced by decode_band_hdr(), and decode_pic_hdr().

static void switch_buffers	(	IVI5DecContext *	ctx,
		AVCodecContext *	avctx
	)			`[static]`

Switches buffers.

Parameters:

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

Definition at line 651 of file indeo5.c.

Referenced by decode_frame().

Variable Documentation

AVCodec indeo5_decoder

Initial value:

 {
    .name           = "indeo5",
    .type           = AVMEDIA_TYPE_VIDEO,
    .id             = CODEC_ID_INDEO5,
    .priv_data_size = sizeof(IVI5DecContext),
    .init           = decode_init,
    .close          = decode_close,
    .decode         = decode_frame,
    .long_name      = NULL_IF_CONFIG_SMALL("Intel Indeo Video Interactive 5"),
}

Definition at line 818 of file indeo5.c.


Data Structures
struct	IVI5DecContext
Defines
#define	ALT_BITSTREAM_READER_LE
#define	IVI5_PIC_SIZE_ESC 15
#define	IVI5_IS_PROTECTED 0x20
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 (IVI5DecContext ctx, AVCodecContext avctx)
	Decodes Indeo5 GOP (Group of pictures) header.
static void	skip_hdr_extension (GetBitContext *gb)
	Skips a header extension.
static int	decode_pic_hdr (IVI5DecContext ctx, AVCodecContext avctx)
	Decodes Indeo5 picture header.
static int	decode_band_hdr (IVI5DecContext ctx, IVIBandDesc band, AVCodecContext *avctx)
	Decodes Indeo5 band header.
static int	decode_mb_info (IVI5DecContext ctx, IVIBandDesc band, IVITile tile, AVCodecContext avctx)
	Decodes info (block type, cbp, quant delta, motion vector) for all macroblocks in the current tile.
static int	decode_band (IVI5DecContext ctx, int plane_num, IVIBandDesc band, AVCodecContext *avctx)
	Decodes an Indeo5 band.
static void	switch_buffers (IVI5DecContext ctx, AVCodecContext avctx)
	Switches buffers.
static av_cold int	decode_init (AVCodecContext *avctx)
	Initializes Indeo5 decoder.
static int	decode_frame (AVCodecContext avctx, void data, int data_size, AVPacket avpkt)
	main decoder function
static av_cold int	decode_close (AVCodecContext *avctx)
	Closes Indeo5 decoder and cleans up its context.
Variables
AVCodec	indeo5_decoder