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libavcodec
ivi_common.h
Go to the documentation of this file.
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/*
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* common functions for Indeo Video Interactive codecs (Indeo4 and Indeo5)
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*
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* Copyright (c) 2009 Maxim Poliakovski
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*
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* This file is part of Libav.
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*
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* Libav is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* Libav is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with Libav; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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#ifndef AVCODEC_IVI_COMMON_H
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#define AVCODEC_IVI_COMMON_H
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#include "
avcodec.h
"
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#include "
get_bits.h
"
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#include <stdint.h>
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#define IVI_VLC_BITS 13
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#define IVI4_STREAM_ANALYSER 0
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#define IVI5_IS_PROTECTED 0x20
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typedef
struct
IVIHuffDesc
{
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int32_t
num_rows
;
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uint8_t
xbits
[16];
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}
IVIHuffDesc
;
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typedef
struct
IVIHuffTab
{
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int32_t
tab_sel
;
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VLC
*
tab
;
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IVIHuffDesc
cust_desc
;
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VLC
cust_tab
;
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}
IVIHuffTab
;
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enum
{
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IVI_MB_HUFF
= 0,
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IVI_BLK_HUFF
= 1
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};
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extern
const
uint8_t
ff_ivi_vertical_scan_8x8
[64];
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extern
const
uint8_t
ff_ivi_horizontal_scan_8x8
[64];
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extern
const
uint8_t
ff_ivi_direct_scan_4x4
[16];
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typedef
void
(
InvTransformPtr
)(
const
int32_t
*in, int16_t *out, uint32_t pitch,
const
uint8_t
*
flags
);
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typedef
void
(
DCTransformPtr
) (
const
int32_t
*in, int16_t *out, uint32_t pitch,
int
blk_size);
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typedef
struct
RVMapDesc
{
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uint8_t
eob_sym
;
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uint8_t
esc_sym
;
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uint8_t
runtab
[256];
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int8_t
valtab
[256];
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}
RVMapDesc
;
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extern
const
RVMapDesc
ff_ivi_rvmap_tabs
[9];
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typedef
struct
IVIMbInfo
{
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int16_t
xpos
;
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int16_t
ypos
;
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uint32_t
buf_offs
;
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uint8_t
type
;
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uint8_t
cbp
;
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int8_t
q_delta
;
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int8_t
mv_x
;
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int8_t
mv_y
;
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}
IVIMbInfo
;
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typedef
struct
IVITile
{
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int
xpos
;
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int
ypos
;
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int
width
;
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int
height
;
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int
mb_size
;
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int
is_empty
;
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int
data_size
;
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int
num_MBs
;
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IVIMbInfo
*
mbs
;
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IVIMbInfo
*
ref_mbs
;
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}
IVITile
;
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typedef
struct
IVIBandDesc
{
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int
plane
;
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int
band_num
;
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int
width
;
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int
height
;
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int
aheight
;
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const
uint8_t
*
data_ptr
;
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int
data_size
;
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int16_t *
buf
;
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int16_t *
ref_buf
;
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int16_t *
bufs
[3];
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int
pitch
;
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int
is_empty
;
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int
mb_size
;
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int
blk_size
;
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int
is_halfpel
;
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int
inherit_mv
;
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int
inherit_qdelta
;
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int
qdelta_present
;
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int
quant_mat
;
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int
glob_quant
;
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const
uint8_t
*
scan
;
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IVIHuffTab
blk_vlc
;
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int
num_corr
;
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uint8_t
corr
[61*2];
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int
rvmap_sel
;
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RVMapDesc
*
rv_map
;
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int
num_tiles
;
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IVITile
*
tiles
;
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InvTransformPtr
*
inv_transform
;
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int
transform_size
;
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DCTransformPtr
*
dc_transform
;
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int
is_2d_trans
;
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int32_t
checksum
;
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int
checksum_present
;
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int
bufsize
;
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const
uint16_t *
intra_base
;
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const
uint16_t *
inter_base
;
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const
uint8_t
*
intra_scale
;
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const
uint8_t
*
inter_scale
;
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}
IVIBandDesc
;
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typedef
struct
IVIPlaneDesc
{
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uint16_t
width
;
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uint16_t
height
;
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uint8_t
num_bands
;
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IVIBandDesc
*
bands
;
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}
IVIPlaneDesc
;
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typedef
struct
IVIPicConfig
{
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uint16_t
pic_width
;
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uint16_t
pic_height
;
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uint16_t
chroma_width
;
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uint16_t
chroma_height
;
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uint16_t
tile_width
;
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uint16_t
tile_height
;
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uint8_t
luma_bands
;
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uint8_t
chroma_bands
;
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}
IVIPicConfig
;
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typedef
struct
IVI45DecContext
{
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GetBitContext
gb
;
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AVFrame
frame
;
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RVMapDesc
rvmap_tabs
[9];
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uint32_t
frame_num
;
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int
frame_type
;
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int
prev_frame_type
;
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uint32_t
data_size
;
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int
is_scalable
;
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int
transp_status
;
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const
uint8_t
*
frame_data
;
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int
inter_scal
;
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uint32_t
frame_size
;
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uint32_t
pic_hdr_size
;
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uint8_t
frame_flags
;
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uint16_t
checksum
;
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IVIPicConfig
pic_conf
;
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IVIPlaneDesc
planes
[3];
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int
buf_switch
;
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int
dst_buf
;
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int
ref_buf
;
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int
ref2_buf
;
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IVIHuffTab
mb_vlc
;
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IVIHuffTab
blk_vlc
;
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uint8_t
rvmap_sel
;
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uint8_t
in_imf
;
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uint8_t
in_q
;
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uint8_t
pic_glob_quant
;
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uint8_t
unknown1
;
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uint16_t
gop_hdr_size
;
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uint8_t
gop_flags
;
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uint32_t
lock_word
;
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#if IVI4_STREAM_ANALYSER
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uint8_t
has_b_frames;
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uint8_t
has_transp;
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uint8_t
uses_tiling;
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uint8_t
uses_haar;
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uint8_t
uses_fullpel;
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#endif
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int (*
decode_pic_hdr
) (
struct
IVI45DecContext
*ctx,
AVCodecContext
*avctx);
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int (*
decode_band_hdr
) (
struct
IVI45DecContext
*ctx,
IVIBandDesc
*band,
AVCodecContext
*avctx);
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int (*
decode_mb_info
) (
struct
IVI45DecContext
*ctx,
IVIBandDesc
*band,
IVITile
*tile,
AVCodecContext
*avctx);
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void
(*
switch_buffers
) (
struct
IVI45DecContext
*ctx);
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int (*
is_nonnull_frame
)(
struct
IVI45DecContext
*ctx);
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int
gop_invalid
;
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}
IVI45DecContext
;
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static
inline
int
ivi_pic_config_cmp
(
IVIPicConfig
*str1,
IVIPicConfig
*str2)
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{
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return
str1->
pic_width
!= str2->
pic_width
|| str1->
pic_height
!= str2->
pic_height
||
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str1->
chroma_width
!= str2->
chroma_width
|| str1->
chroma_height
!= str2->
chroma_height
||
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str1->
tile_width
!= str2->
tile_width
|| str1->
tile_height
!= str2->
tile_height
||
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str1->
luma_bands
!= str2->
luma_bands
|| str1->
chroma_bands
!= str2->
chroma_bands
;
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}
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#define IVI_NUM_TILES(stride, tile_size) (((stride) + (tile_size) - 1) / (tile_size))
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#define IVI_MBs_PER_TILE(tile_width, tile_height, mb_size) \
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((((tile_width) + (mb_size) - 1) / (mb_size)) * (((tile_height) + (mb_size) - 1) / (mb_size)))
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#define IVI_TOSIGNED(val) (-(((val) >> 1) ^ -((val) & 1)))
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static
inline
int
ivi_scale_mv
(
int
mv
,
int
mv_scale)
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{
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return
(mv + (mv > 0) + (mv_scale - 1)) >> mv_scale;
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}
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void
ff_ivi_init_static_vlc
(
void
);
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int
ff_ivi_dec_huff_desc
(
GetBitContext
*
gb
,
int
desc_coded,
int
which_tab,
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IVIHuffTab
*huff_tab,
AVCodecContext
*avctx);
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int
ff_ivi_init_planes
(
IVIPlaneDesc
*
planes
,
const
IVIPicConfig
*cfg);
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int
ff_ivi_init_tiles
(
IVIPlaneDesc
*
planes
,
int
tile_width,
int
tile_height);
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int
ff_ivi_decode_frame
(
AVCodecContext
*avctx,
void
*
data
,
int
*got_frame,
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AVPacket
*avpkt);
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av_cold
int
ff_ivi_decode_close
(
AVCodecContext
*avctx);
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#endif
/* AVCODEC_IVI_COMMON_H */