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libavcodec
vp8.h
Go to the documentation of this file.
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/*
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* VP8 compatible video decoder
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*
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* Copyright (C) 2010 David Conrad
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* Copyright (C) 2010 Ronald S. Bultje
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* Copyright (C) 2010 Jason Garrett-Glaser
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* Copyright (C) 2012 Daniel Kang
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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_VP8_H
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#define AVCODEC_VP8_H
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#include "
libavutil/buffer.h
"
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#include "
vp56.h
"
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#include "
vp8dsp.h
"
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#include "
h264pred.h
"
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#include "
thread.h
"
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#if HAVE_PTHREADS
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#include <pthread.h>
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#elif HAVE_W32THREADS
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#include "
compat/w32pthreads.h
"
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#endif
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#define VP8_MAX_QUANT 127
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enum
dct_token
{
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DCT_0
,
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DCT_1
,
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DCT_2
,
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DCT_3
,
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DCT_4
,
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DCT_CAT1
,
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DCT_CAT2
,
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DCT_CAT3
,
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DCT_CAT4
,
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DCT_CAT5
,
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DCT_CAT6
,
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DCT_EOB
,
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NUM_DCT_TOKENS
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};
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// used to signal 4x4 intra pred in luma MBs
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#define MODE_I4x4 4
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enum
inter_mvmode
{
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VP8_MVMODE_ZERO
=
MODE_I4x4
+ 1,
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VP8_MVMODE_MV
,
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VP8_MVMODE_SPLIT
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};
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enum
inter_splitmvmode
{
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VP8_SPLITMVMODE_16x8
= 0,
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VP8_SPLITMVMODE_8x16
,
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VP8_SPLITMVMODE_8x8
,
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VP8_SPLITMVMODE_4x4
,
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VP8_SPLITMVMODE_NONE
,
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};
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typedef
struct
VP8FilterStrength
{
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uint8_t
filter_level
;
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uint8_t
inner_limit
;
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uint8_t
inner_filter
;
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}
VP8FilterStrength
;
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typedef
struct
VP8Macroblock
{
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uint8_t
skip
;
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// todo: make it possible to check for at least (i4x4 or split_mv)
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// in one op. are others needed?
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uint8_t
mode
;
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uint8_t
ref_frame
;
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uint8_t
partitioning
;
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uint8_t
chroma_pred_mode
;
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uint8_t
segment
;
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uint8_t
intra4x4_pred_mode_mb
[16];
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uint8_t
intra4x4_pred_mode_top
[4];
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VP56mv
mv
;
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VP56mv
bmv
[16];
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}
VP8Macroblock
;
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typedef
struct
VP8ThreadData
{
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DECLARE_ALIGNED
(16, int16_t,
block
)[6][4][16];
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DECLARE_ALIGNED
(16, int16_t,
block_dc
)[16];
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DECLARE_ALIGNED
(16,
uint8_t
,
non_zero_count_cache
)[6][4];
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DECLARE_ALIGNED
(8,
uint8_t
,
left_nnz
)[9];
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int
thread_nr
;
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#if HAVE_THREADS
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pthread_mutex_t
lock;
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pthread_cond_t
cond;
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#endif
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int
thread_mb_pos
;
// (mb_y << 16) | (mb_x & 0xFFFF)
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int
wait_mb_pos
;
// What the current thread is waiting on.
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#define EDGE_EMU_LINESIZE 32
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DECLARE_ALIGNED
(16,
uint8_t
,
edge_emu_buffer
)[21 *
EDGE_EMU_LINESIZE
];
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VP8FilterStrength
*
filter_strength
;
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}
VP8ThreadData
;
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typedef
struct
VP8Frame
{
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ThreadFrame
tf
;
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AVBufferRef
*
seg_map
;
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}
VP8Frame
;
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#define MAX_THREADS 8
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typedef
struct
VP8Context
{
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VP8ThreadData
*
thread_data
;
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AVCodecContext
*
avctx
;
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VP8Frame
*
framep
[4];
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VP8Frame
*
next_framep
[4];
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VP8Frame
*
curframe
;
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VP8Frame
*
prev_frame
;
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uint16_t
mb_width
;
/* number of horizontal MB */
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uint16_t
mb_height
;
/* number of vertical MB */
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int
linesize
;
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int
uvlinesize
;
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uint8_t
keyframe
;
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uint8_t
deblock_filter
;
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uint8_t
mbskip_enabled
;
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uint8_t
profile
;
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VP56mv
mv_min
;
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VP56mv
mv_max
;
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int8_t
sign_bias
[4];
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int
ref_count
[3];
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struct
{
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uint8_t
enabled
;
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uint8_t
absolute_vals
;
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uint8_t
update_map
;
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int8_t
base_quant
[4];
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int8_t
filter_level
[4];
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}
segmentation
;
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struct
{
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uint8_t
simple
;
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uint8_t
level
;
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uint8_t
sharpness
;
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}
filter
;
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VP8Macroblock
*
macroblocks
;
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uint8_t
*
intra4x4_pred_mode_top
;
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uint8_t
intra4x4_pred_mode_left
[4];
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struct
{
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// [0] - DC qmul [1] - AC qmul
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int16_t
luma_qmul
[2];
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int16_t
luma_dc_qmul
[2];
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int16_t
chroma_qmul
[2];
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}
qmat
[4];
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struct
{
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uint8_t
enabled
;
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int8_t
mode
[
VP8_MVMODE_SPLIT
+1];
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int8_t
ref
[4];
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}
lf_delta
;
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uint8_t
(*
top_border
)[16+8+8];
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uint8_t
(*
top_nnz
)[9];
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VP56RangeCoder
c
;
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struct
{
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uint8_t
segmentid
[3];
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uint8_t
mbskip
;
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uint8_t
intra
;
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uint8_t
last
;
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uint8_t
golden
;
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uint8_t
pred16x16
[4];
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uint8_t
pred8x8c
[3];
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uint8_t
token
[4][16][3][
NUM_DCT_TOKENS
-1];
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uint8_t
mvc
[2][19];
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}
prob
[2];
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VP8Macroblock
*
macroblocks_base
;
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int
invisible
;
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int
update_last
;
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int
update_golden
;
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int
update_altref
;
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int
update_probabilities
;
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int
num_coeff_partitions
;
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VP56RangeCoder
coeff_partition
[8];
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VideoDSPContext
vdsp
;
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VP8DSPContext
vp8dsp
;
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H264PredContext
hpc
;
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vp8_mc_func
put_pixels_tab
[3][3][3];
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VP8Frame
frames
[5];
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int
num_jobs
;
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int
mb_layout
;
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}
VP8Context
;
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int
ff_vp8_decode_init
(
AVCodecContext
*avctx);
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int
ff_vp8_decode_frame
(
AVCodecContext
*avctx,
void
*
data
,
int
*got_frame,
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AVPacket
*avpkt);
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int
ff_vp8_decode_free
(
AVCodecContext
*avctx);
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#endif
/* AVCODEC_VP8_H */
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