This file contains functions and data shared by both Indeo4 and Indeo5 decoders. More...

#include "libavutil/attributes.h"
#include "avcodec.h"
#include "get_bits.h"
#include "internal.h"
#include "mathops.h"
#include "ivi_common.h"
#include "ivi_dsp.h"

Macros
#define	BITSTREAM_READER_LE

Functions
static uint16_t	inv_bits (uint16_t val, int nbits)
	Reverse "nbits" bits of the value "val" and return the result in the least significant bits.

static int	ivi_create_huff_from_desc (const IVIHuffDesc cb, VLC vlc, int flag)

void	ff_ivi_init_static_vlc (void)
	Initialize static codes used for macroblock and block decoding.

static void	ivi_huff_desc_copy (IVIHuffDesc dst, const IVIHuffDesc src)

static int	ivi_huff_desc_cmp (const IVIHuffDesc desc1, const IVIHuffDesc desc2)

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.

static av_cold void	ivi_free_buffers (IVIPlaneDesc *planes)

av_cold int	ff_ivi_init_planes (IVIPlaneDesc planes, const IVIPicConfig cfg)
	Initialize planes (prepares descriptors, allocates buffers etc).

av_cold int	ff_ivi_init_tiles (IVIPlaneDesc *planes, int tile_width, int tile_height)
	Initialize tile and macroblock descriptors.

static int	ivi_dec_tile_data_size (GetBitContext *gb)

static int	ivi_decode_blocks (GetBitContext gb, IVIBandDesc band, IVITile tile, AVCodecContext avctx)

static int	ivi_process_empty_tile (AVCodecContext avctx, IVIBandDesc band, IVITile *tile, int32_t mv_scale)
	Handle empty tiles by performing data copying and motion compensation respectively.

static void	ivi_output_plane (IVIPlaneDesc plane, uint8_t dst, int dst_pitch)

static int	decode_band (IVI45DecContext ctx, IVIBandDesc band, AVCodecContext *avctx)
	Decode an Indeo 4 or 5 band.

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

av_cold int	ff_ivi_decode_close (AVCodecContext *avctx)
	Close Indeo5 decoder and clean up its context.

Variables
const IVIHuffDesc	ff_ivi_mb_huff_desc [8]
	static macroblock huffman tables

const IVIHuffDesc	ff_ivi_blk_huff_desc [8]
	static block huffman tables

static VLC	ivi_mb_vlc_tabs [8]
	static macroblock Huffman tables

static VLC	ivi_blk_vlc_tabs [8]
	static block Huffman tables

const uint8_t	ff_ivi_vertical_scan_8x8 [64]
	Scan patterns shared between indeo4 and indeo5.

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.

Detailed Description

This file contains functions and data shared by both Indeo4 and Indeo5 decoders.

Definition in file ivi_common.c.

Macro Definition Documentation

#define BITSTREAM_READER_LE

Definition at line 29 of file ivi_common.c.

Function Documentation

static uint16_t inv_bits	(	uint16_t	val,
		int	nbits
	)

static

Reverse "nbits" bits of the value "val" and return the result in the least significant bits.

Definition at line 48 of file ivi_common.c.

Referenced by ivi_create_huff_from_desc().

static int ivi_create_huff_from_desc	(	const IVIHuffDesc *	cb,
		VLC *	vlc,
		int	flag
	)

static

Definition at line 69 of file ivi_common.c.

Referenced by ff_ivi_dec_huff_desc(), and ff_ivi_init_static_vlc().

void ff_ivi_init_static_vlc ( void )

Initialize static codes used for macroblock and block decoding.

Definition at line 103 of file ivi_common.c.

Referenced by decode_init().

static void ivi_huff_desc_copy	(	IVIHuffDesc *	dst,
		const IVIHuffDesc *	src
	)

static

Definition at line 128 of file ivi_common.c.

Referenced by ff_ivi_dec_huff_desc().

static int ivi_huff_desc_cmp	(	const IVIHuffDesc *	desc1,
		const IVIHuffDesc *	desc2
	)

static

Definition at line 141 of file ivi_common.c.

Referenced by ff_ivi_dec_huff_desc().

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]	gb	the GetBit context
[in]	desc_coded	flag signalling if table descriptor was coded
[in]	which_tab	codebook purpose (IVI_MB_HUFF or IVI_BLK_HUFF)
[out]	huff_tab	pointer to the descriptor of the selected table
[in]	avctx	AVCodecContext pointer

Returns: zero on success, negative value otherwise

Definition at line 147 of file ivi_common.c.

Referenced by decode_band_hdr(), and decode_pic_hdr().

static av_cold void ivi_free_buffers ( IVIPlaneDesc * planes )

static

Definition at line 201 of file ivi_common.c.

Referenced by ff_ivi_decode_close(), and ff_ivi_init_planes().

av_cold int ff_ivi_init_planes	(	IVIPlaneDesc *	planes,
		const IVIPicConfig *	cfg
	)

Initialize planes (prepares descriptors, allocates buffers etc).

Parameters

[in,out]	planes	pointer to the array of the plane descriptors
[in]	cfg	pointer to the ivi_pic_config structure describing picture layout

Returns: result code: 0 - OK

Definition at line 222 of file ivi_common.c.

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

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

Initialize tile and macroblock descriptors.

Parameters

[in,out]	planes	pointer to the array of the plane descriptors
[in]	tile_width	tile width
[in]	tile_height	tile height

Returns: result code: 0 - OK

Definition at line 286 of file ivi_common.c.

Referenced by decode_gop_header(), and decode_pic_hdr().

static int ivi_dec_tile_data_size ( GetBitContext * gb )

static

Definition at line 366 of file ivi_common.c.

Referenced by decode_band().

static int ivi_decode_blocks	(	GetBitContext *	gb,
		IVIBandDesc *	band,
		IVITile *	tile,
		AVCodecContext *	avctx
	)

static

Definition at line 394 of file ivi_common.c.

Referenced by decode_band().

static int ivi_process_empty_tile	(	AVCodecContext *	avctx,
		IVIBandDesc *	band,
		IVITile *	tile,
		int32_t	mv_scale
	)

static

Handle empty tiles by performing data copying and motion compensation respectively.

Parameters

[in]	avctx	ptr to the AVCodecContext
[in]	band	pointer to the band descriptor
[in]	tile	pointer to the tile descriptor
[in]	mv_scale	scaling factor for motion vectors

Definition at line 567 of file ivi_common.c.

Referenced by decode_band().

static void ivi_output_plane	(	IVIPlaneDesc *	plane,
		uint8_t *	dst,
		int	dst_pitch
	)

static

Definition at line 712 of file ivi_common.c.

Referenced by ff_ivi_decode_frame().

static int decode_band	(	IVI45DecContext *	ctx,
		IVIBandDesc *	band,
		AVCodecContext *	avctx
	)

static

Decode an Indeo 4 or 5 band.

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 737 of file ivi_common.c.

Referenced by ff_ivi_decode_frame().

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

Definition at line 844 of file ivi_common.c.

av_cold int ff_ivi_decode_close ( AVCodecContext * avctx )

Close Indeo5 decoder and clean up its context.

Definition at line 937 of file ivi_common.c.

Variable Documentation

const IVIHuffDesc ff_ivi_mb_huff_desc

Initial value:

= {
    {8,  {0, 4, 5, 4, 4, 4, 6, 6}},
    {12, {0, 2, 2, 3, 3, 3, 3, 5, 3, 2, 2, 2}},
    {12, {0, 2, 3, 4, 3, 3, 3, 3, 4, 3, 2, 2}},
    {12, {0, 3, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2}},
    {13, {0, 4, 4, 3, 3, 3, 3, 2, 3, 3, 2, 1, 1}},
    {9,  {0, 4, 4, 4, 4, 3, 3, 3, 2}},
    {10, {0, 4, 4, 4, 4, 3, 3, 2, 2, 2}},
    {12, {0, 4, 4, 4, 3, 3, 2, 3, 2, 2, 2, 2}}
}

static macroblock huffman tables

These are 2x8 predefined Huffman codebooks for coding macroblock/block signals.

They are specified using "huffman descriptors" in order to avoid huge static tables. The decoding tables will be generated at startup from these descriptors.

Definition at line 976 of file ivi_common.c.

const IVIHuffDesc ff_ivi_blk_huff_desc

Initial value:

= {
    {10, {1, 2, 3, 4, 4, 7, 5, 5, 4, 1}},
    {11, {2, 3, 4, 4, 4, 7, 5, 4, 3, 3, 2}},
    {12, {2, 4, 5, 5, 5, 5, 6, 4, 4, 3, 1, 1}},
    {13, {3, 3, 4, 4, 5, 6, 6, 4, 4, 3, 2, 1, 1}},
    {11, {3, 4, 4, 5, 5, 5, 6, 5, 4, 2, 2}},
    {13, {3, 4, 5, 5, 5, 5, 6, 4, 3, 3, 2, 1, 1}},
    {13, {3, 4, 5, 5, 5, 6, 5, 4, 3, 3, 2, 1, 1}},
    {9,  {3, 4, 4, 5, 5, 5, 6, 5, 5}}
}

static block huffman tables

Definition at line 987 of file ivi_common.c.

VLC ivi_mb_vlc_tabs[8]

static

static macroblock Huffman tables

Definition at line 41 of file ivi_common.c.

VLC ivi_blk_vlc_tabs[8]

static

static block Huffman tables

Definition at line 42 of file ivi_common.c.

const uint8_t ff_ivi_vertical_scan_8x8[64]

Initial value:

= {
    0,  8, 16, 24, 32, 40, 48, 56,
    1,  9, 17, 25, 33, 41, 49, 57,
    2, 10, 18, 26, 34, 42, 50, 58,
    3, 11, 19, 27, 35, 43, 51, 59,
    4, 12, 20, 28, 36, 44, 52, 60,
    5, 13, 21, 29, 37, 45, 53, 61,
    6, 14, 22, 30, 38, 46, 54, 62,
    7, 15, 23, 31, 39, 47, 55, 63
}

Scan patterns shared between indeo4 and indeo5.

Common scan patterns (defined in ivi_common.c)

Definition at line 1002 of file ivi_common.c.

Referenced by decode_gop_header().

const uint8_t ff_ivi_horizontal_scan_8x8[64]

Initial value:

= {
     0,  1,  2,  3,  4,  5,  6,  7,
     8,  9, 10, 11, 12, 13, 14, 15,
    16, 17, 18, 19, 20, 21, 22, 23,
    24, 25, 26, 27, 28, 29, 30, 31,
    32, 33, 34, 35, 36, 37, 38, 39,
    40, 41, 42, 43, 44, 45, 46, 47,
    48, 49, 50, 51, 52, 53, 54, 55,
    56, 57, 58, 59, 60, 61, 62, 63
}

Definition at line 1013 of file ivi_common.c.

Referenced by decode_gop_header().

const uint8_t ff_ivi_direct_scan_4x4[16]

Initial value:

= {
    0, 1, 4, 8, 5, 2, 3, 6, 9, 12, 13, 10, 7, 11, 14, 15
}

Definition at line 1024 of file ivi_common.c.

Referenced by decode_gop_header().

const RVMapDesc ff_ivi_rvmap_tabs[9]

Run-value (RLE) tables.

Definition at line 1032 of file ivi_common.c.

Referenced by decode_init().

Macros

Functions

Variables

Detailed Description

Macro Definition Documentation

Function Documentation

Variable Documentation