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libavcodec
rv34.h
Go to the documentation of this file.
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/*
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* RV30/40 decoder common data declarations
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* Copyright (c) 2007 Mike Melanson, Konstantin Shishkov
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*
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* This file is part of FFmpeg.
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*
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* FFmpeg 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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* FFmpeg 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 FFmpeg; 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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/**
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* @file
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* RV30 and RV40 decoder common data declarations
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*/
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#ifndef AVCODEC_RV34_H
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#define AVCODEC_RV34_H
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#include "
avcodec.h
"
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#include "
mpegvideo.h
"
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#include "
h264pred.h
"
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#include "
rv34dsp.h
"
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#define MB_TYPE_SEPARATE_DC 0x01000000
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#define IS_SEPARATE_DC(a) ((a) & MB_TYPE_SEPARATE_DC)
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/**
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* RV30 and RV40 Macroblock types
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*/
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enum
RV40BlockTypes
{
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RV34_MB_TYPE_INTRA
,
///< Intra macroblock
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RV34_MB_TYPE_INTRA16x16
,
///< Intra macroblock with DCs in a separate 4x4 block
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RV34_MB_P_16x16
,
///< P-frame macroblock, one motion frame
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RV34_MB_P_8x8
,
///< P-frame macroblock, 8x8 motion compensation partitions
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RV34_MB_B_FORWARD
,
///< B-frame macroblock, forward prediction
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RV34_MB_B_BACKWARD
,
///< B-frame macroblock, backward prediction
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RV34_MB_SKIP
,
///< Skipped block
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RV34_MB_B_DIRECT
,
///< Bidirectionally predicted B-frame macroblock, no motion vectors
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RV34_MB_P_16x8
,
///< P-frame macroblock, 16x8 motion compensation partitions
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RV34_MB_P_8x16
,
///< P-frame macroblock, 8x16 motion compensation partitions
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RV34_MB_B_BIDIR
,
///< Bidirectionally predicted B-frame macroblock, two motion vectors
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RV34_MB_P_MIX16x16
,
///< P-frame macroblock with DCs in a separate 4x4 block, one motion vector
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RV34_MB_TYPES
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};
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/**
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* VLC tables used by the decoder
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*
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* Intra frame VLC sets do not contain some of those tables.
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*/
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typedef
struct
RV34VLC
{
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VLC
cbppattern
[2];
///< VLCs used for pattern of coded block patterns decoding
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VLC
cbp
[2][4];
///< VLCs used for coded block patterns decoding
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VLC
first_pattern
[4];
///< VLCs used for decoding coefficients in the first subblock
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VLC
second_pattern
[2];
///< VLCs used for decoding coefficients in the subblocks 2 and 3
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VLC
third_pattern
[2];
///< VLCs used for decoding coefficients in the last subblock
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VLC
coefficient
;
///< VLCs used for decoding big coefficients
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}
RV34VLC
;
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/** essential slice information */
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typedef
struct
SliceInfo
{
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int
type
;
///< slice type (intra, inter)
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int
quant
;
///< quantizer used for this slice
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int
vlc_set
;
///< VLCs used for this slice
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int
start
,
end
;
///< start and end macroblocks of the slice
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int
width
;
///< coded width
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int
height
;
///< coded height
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int
pts
;
///< frame timestamp
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}
SliceInfo
;
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/** decoder context */
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typedef
struct
RV34DecContext
{
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MpegEncContext
s
;
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RV34DSPContext
rdsp
;
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int8_t *
intra_types_hist
;
///< old block types, used for prediction
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int8_t *
intra_types
;
///< block types
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int
intra_types_stride
;
///< block types array stride
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const
uint8_t
*
luma_dc_quant_i
;
///< luma subblock DC quantizer for intraframes
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const
uint8_t
*
luma_dc_quant_p
;
///< luma subblock DC quantizer for interframes
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RV34VLC
*
cur_vlcs
;
///< VLC set used for current frame decoding
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H264PredContext
h
;
///< functions for 4x4 and 16x16 intra block prediction
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SliceInfo
si
;
///< current slice information
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int
*
mb_type
;
///< internal macroblock types
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int
block_type
;
///< current block type
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int
luma_vlc
;
///< which VLC set will be used for decoding of luma blocks
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int
chroma_vlc
;
///< which VLC set will be used for decoding of chroma blocks
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int
is16
;
///< current block has additional 16x16 specific features or not
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int
dmv
[4][2];
///< differential motion vectors for the current macroblock
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int
rv30
;
///< indicates which RV variasnt is currently decoded
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int
rpr
;
///< one field size in RV30 slice header
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int
cur_pts
,
last_pts
,
next_pts
;
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int
scaled_weight
;
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int
weight1
,
weight2
;
///< B frame distance fractions (0.14) used in motion compensation
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int
mv_weight1
,
mv_weight2
;
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uint16_t *
cbp_luma
;
///< CBP values for luma subblocks
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uint8_t
*
cbp_chroma
;
///< CBP values for chroma subblocks
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uint16_t *
deblock_coefs
;
///< deblock coefficients for each macroblock
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/** 8x8 block available flags (for MV prediction) */
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DECLARE_ALIGNED
(8, uint32_t,
avail_cache
)[3*4];
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/** temporary blocks for RV4 weighted MC */
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uint8_t
*
tmp_b_block_y
[2];
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uint8_t
*
tmp_b_block_uv
[4];
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uint8_t
*
tmp_b_block_base
;
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int (*
parse_slice_header
)(
struct
RV34DecContext
*
r
,
GetBitContext
*gb,
SliceInfo
*
si
);
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int (*
decode_mb_info
)(
struct
RV34DecContext
*
r
);
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int (*
decode_intra_types
)(
struct
RV34DecContext
*
r
,
GetBitContext
*gb, int8_t *dst);
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void
(*
loop_filter
)(
struct
RV34DecContext
*
r
,
int
row);
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}
RV34DecContext
;
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/**
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* common decoding functions
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*/
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int
ff_rv34_get_start_offset
(
GetBitContext
*gb,
int
blocks);
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int
ff_rv34_decode_init
(
AVCodecContext
*avctx);
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int
ff_rv34_decode_frame
(
AVCodecContext
*avctx,
void
*
data
,
int
*got_frame,
AVPacket
*avpkt);
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int
ff_rv34_decode_end
(
AVCodecContext
*avctx);
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int
ff_rv34_decode_init_thread_copy
(
AVCodecContext
*avctx);
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int
ff_rv34_decode_update_thread_context
(
AVCodecContext
*dst,
const
AVCodecContext
*
src
);
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#endif
/* AVCODEC_RV34_H */
Generated on Sat Jan 25 2014 19:51:54 for FFmpeg by
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