generic-library/vpx
1
0
Fork 0
Code Issues Pull Requests Releases Wiki Activity
vpx/vp8/decoder/detokenize.c
Yaowu Xu 6035da5448 WebM Experimental Codec Branch Snapshot 
This is a code snapshot of experimental work currently ongoing for a
next-generation codec.

The codebase has been cut down considerably from the libvpx baseline.
For example, we are currently only supporting VBR 2-pass rate control
and have removed most of the code relating to coding speed, threading,
error resilience, partitions and various other features.  This is in
part to make the codebase easier to work on and experiment with, but
also because we want to have an open discussion about how the bitstream
will be structured and partitioned and not have that conversation
constrained by past work.

Our basic working pattern has been to initially encapsulate experiments
using configure options linked to #IF CONFIG_XXX statements in the
code. Once experiments have matured and we are reasonably happy that
they give benefit and can be merged without breaking other experiments,
we remove the conditional compile statements and merge them in.

Current changes include:
* Temporal coding experiment for segments (though still only 4 max, it
  will likely be increased).
* Segment feature experiment - to allow various bits of information to
  be coded at the segment level. Features tested so far include mode
  and reference frame information, limiting end of block offset and
  transform size, alongside Q and loop filter parameters, but this set
  is very fluid.
* Support for 8x8 transform - 8x8 dct with 2nd order 2x2 haar is used
  in MBs using 16x16 prediction modes within inter frames.
* Compound prediction (combination of signals from existing predictors
  to create a new predictor).
* 8 tap interpolation filters and 1/8th pel motion vectors.
* Loop filter modifications.
* Various entropy modifications and changes to how entropy contexts and
  updates are handled.
* Extended quantizer range matched to transform precision improvements.

There are also ongoing further experiments that we hope to merge in the
near future: For example, coding of motion and other aspects of the
prediction signal to better support larger image formats, use of larger
block sizes (e.g. 32x32 and up) and lossless non-transform based coding
options (especially for key frames). It is our hope that we will be
able to make regular updates and we will warmly welcome community
contributions.

Please be warned that, at this stage, the codebase is currently slower
than VP8 stable branch as most new code has not been optimized, and
even the 'C' has been deliberately written to be simple and obvious,
not fast.

The following graphs have the initial test results, numbers in the
tables measure the compression improvement in terms of percentage. The
build has  the following optional experiments configured:
--enable-experimental --enable-enhanced_interp --enable-uvintra
--enable-high_precision_mv --enable-sixteenth_subpel_uv

CIF Size clips:
http://getwebm.org/tmp/cif/
HD size clips:
http://getwebm.org/tmp/hd/
(stable_20120309 represents encoding results of WebM master branch
build as of commit#7a15907)

They were encoded using the following encode parameters:
--good --cpu-used=0 -t 0 --lag-in-frames=25 --min-q=0 --max-q=63
--end-usage=0 --auto-alt-ref=1 -p 2 --pass=2 --kf-max-dist=9999
--kf-min-dist=0 --drop-frame=0 --static-thresh=0 --bias-pct=50
--minsection-pct=0 --maxsection-pct=800 --sharpness=0
--arnr-maxframes=7 --arnr-strength=3(for HD,6 for CIF)
--arnr-type=3

Change-Id: I5c62ed09cfff5815a2bb34e7820d6a810c23183c
2012-03-15 07:36:47 -07:00

795 lines
21 KiB
C
Raw Blame History

/*
* Copyright (c) 2010 The WebM project authors. All Rights Reserved.
*
* Use of this source code is governed by a BSD-style license
* that can be found in the LICENSE file in the root of the source
* tree. An additional intellectual property rights grant can be found
* in the file PATENTS. All contributing project authors may
* be found in the AUTHORS file in the root of the source tree.
*/
#include "vp8/common/type_aliases.h"
#include "vp8/common/blockd.h"
#include "onyxd_int.h"
#include "vpx_mem/vpx_mem.h"
#include "vpx_ports/mem.h"
#include "detokenize.h"
#include "vp8/common/seg_common.h"
#define BOOL_DATA UINT8
#define OCB_X PREV_COEF_CONTEXTS * ENTROPY_NODES
DECLARE_ALIGNED(16, static const unsigned char, coef_bands_x[16]) =
{
0 * OCB_X, 1 * OCB_X, 2 * OCB_X, 3 * OCB_X,
6 * OCB_X, 4 * OCB_X, 5 * OCB_X, 6 * OCB_X,
6 * OCB_X, 6 * OCB_X, 6 * OCB_X, 6 * OCB_X,
6 * OCB_X, 6 * OCB_X, 6 * OCB_X, 7 * OCB_X
};
DECLARE_ALIGNED(64, static const unsigned char, coef_bands_x_8x8[64]) = {
0 * OCB_X, 1 * OCB_X, 2 * OCB_X, 3 * OCB_X, 5 * OCB_X, 4 * OCB_X, 4 * OCB_X, 5 * OCB_X,
5 * OCB_X, 3 * OCB_X, 6 * OCB_X, 3 * OCB_X, 5 * OCB_X, 4 * OCB_X, 6 * OCB_X, 6 * OCB_X,
6 * OCB_X, 5 * OCB_X, 5 * OCB_X, 6 * OCB_X, 6 * OCB_X, 6 * OCB_X, 6 * OCB_X, 6 * OCB_X,
6 * OCB_X, 6 * OCB_X, 6 * OCB_X, 6 * OCB_X, 6 * OCB_X, 6 * OCB_X, 6 * OCB_X, 6 * OCB_X,
6 * OCB_X, 6 * OCB_X, 6 * OCB_X, 6 * OCB_X, 7 * OCB_X, 7 * OCB_X, 7 * OCB_X, 7 * OCB_X,
7 * OCB_X, 7 * OCB_X, 7 * OCB_X, 7 * OCB_X, 7 * OCB_X, 7 * OCB_X, 7 * OCB_X, 7 * OCB_X,
7 * OCB_X, 7 * OCB_X, 7 * OCB_X, 7 * OCB_X, 7 * OCB_X, 7 * OCB_X, 7 * OCB_X, 7 * OCB_X,
7 * OCB_X, 7 * OCB_X, 7 * OCB_X, 7 * OCB_X, 7 * OCB_X, 7 * OCB_X, 7 * OCB_X, 7 * OCB_X,
};
#define EOB_CONTEXT_NODE 0
#define ZERO_CONTEXT_NODE 1
#define ONE_CONTEXT_NODE 2
#define LOW_VAL_CONTEXT_NODE 3
#define TWO_CONTEXT_NODE 4
#define THREE_CONTEXT_NODE 5
#define HIGH_LOW_CONTEXT_NODE 6
#define CAT_ONE_CONTEXT_NODE 7
#define CAT_THREEFOUR_CONTEXT_NODE 8
#define CAT_THREE_CONTEXT_NODE 9
#define CAT_FIVE_CONTEXT_NODE 10
#define CAT1_MIN_VAL 5
#define CAT2_MIN_VAL 7
#define CAT3_MIN_VAL 11
#define CAT4_MIN_VAL 19
#define CAT5_MIN_VAL 35
#define CAT6_MIN_VAL 67
#define CAT1_PROB0 159
#define CAT2_PROB0 145
#define CAT2_PROB1 165
#define CAT3_PROB0 140
#define CAT3_PROB1 148
#define CAT3_PROB2 173
#define CAT4_PROB0 135
#define CAT4_PROB1 140
#define CAT4_PROB2 155
#define CAT4_PROB3 176
#define CAT5_PROB0 130
#define CAT5_PROB1 134
#define CAT5_PROB2 141
#define CAT5_PROB3 157
#define CAT5_PROB4 180
static const unsigned char cat6_prob[14] =
{ 129, 130, 133, 140, 153, 177, 196, 230, 243, 249, 252, 254, 254, 0 };
void vp8_reset_mb_tokens_context(MACROBLOCKD *x)
{
/* Clear entropy contexts for Y2 blocks */
if (x->mode_info_context->mbmi.mode != B_PRED &&
x->mode_info_context->mbmi.mode != I8X8_PRED &&
x->mode_info_context->mbmi.mode != SPLITMV)
{
vpx_memset(x->above_context, 0, sizeof(ENTROPY_CONTEXT_PLANES));
vpx_memset(x->left_context, 0, sizeof(ENTROPY_CONTEXT_PLANES));
}
else
{
vpx_memset(x->above_context, 0, sizeof(ENTROPY_CONTEXT_PLANES)-1);
vpx_memset(x->left_context, 0, sizeof(ENTROPY_CONTEXT_PLANES)-1);
}
}
DECLARE_ALIGNED(16, extern const unsigned char, vp8_norm[256]);
#define FILL \
if(count < 0) \
VP8DX_BOOL_DECODER_FILL(count, value, bufptr, bufend);
#define NORMALIZE \
/*if(range < 0x80)*/ \
{ \
shift = vp8_norm[range]; \
range <<= shift; \
value <<= shift; \
count -= shift; \
}
#define DECODE_AND_APPLYSIGN(value_to_sign) \
split = (range + 1) >> 1; \
bigsplit = (VP8_BD_VALUE)split << (VP8_BD_VALUE_SIZE - 8); \
FILL \
if ( value < bigsplit ) \
{ \
range = split; \
v= value_to_sign; \
} \
else \
{ \
range = range-split; \
value = value-bigsplit; \
v = -value_to_sign; \
} \
range +=range; \
value +=value; \
count--;
#define DECODE_AND_BRANCH_IF_ZERO(probability,branch) \
{ \
split = 1 + ((( probability*(range-1) ) )>> 8); \
bigsplit = (VP8_BD_VALUE)split << (VP8_BD_VALUE_SIZE - 8); \
FILL \
if ( value < bigsplit ) \
{ \
range = split; \
NORMALIZE \
goto branch; \
} \
value -= bigsplit; \
range = range - split; \
NORMALIZE \
}
#define DECODE_AND_LOOP_IF_ZERO(probability,branch) \
{ \
split = 1 + ((( probability*(range-1) ) ) >> 8); \
bigsplit = (VP8_BD_VALUE)split << (VP8_BD_VALUE_SIZE - 8); \
FILL \
if ( value < bigsplit ) \
{ \
range = split; \
NORMALIZE \
Prob = coef_probs; \
if(c<15) {\
++c; \
Prob += coef_bands_x[c]; \
goto branch; \
} goto BLOCK_FINISHED; /*for malformed input */\
} \
value -= bigsplit; \
range = range - split; \
NORMALIZE \
}
#define DECODE_AND_LOOP_IF_ZERO_8x8_2(probability,branch) \
{ \
split = 1 + ((( probability*(range-1) ) ) >> 8); \
bigsplit = (VP8_BD_VALUE)split << (VP8_BD_VALUE_SIZE - 8); \
FILL \
if ( value < bigsplit ) \
{ \
range = split; \
NORMALIZE \
Prob = coef_probs; \
if(c<3) {\
++c; \
Prob += coef_bands_x[c]; \
goto branch; \
} goto BLOCK_FINISHED_8x8; /*for malformed input */\
} \
value -= bigsplit; \
range = range - split; \
NORMALIZE \
}
#define DECODE_AND_LOOP_IF_ZERO_8X8(probability,branch) \
{ \
split = 1 + ((( probability*(range-1) ) ) >> 8); \
bigsplit = (VP8_BD_VALUE)split << (VP8_BD_VALUE_SIZE - 8); \
FILL \
if ( value < bigsplit ) \
{ \
range = split; \
NORMALIZE \
Prob = coef_probs; \
if(c<63) {\
++c; \
Prob += coef_bands_x_8x8[c]; \
goto branch; \
} goto BLOCK_FINISHED_8x8; /*for malformed input */\
} \
value -= bigsplit; \
range = range - split; \
NORMALIZE \
}
#define DECODE_SIGN_WRITE_COEFF_AND_CHECK_EXIT(val) \
DECODE_AND_APPLYSIGN(val) \
Prob = coef_probs + (ENTROPY_NODES*2); \
if(c < 15){\
qcoeff_ptr [ scan[c] ] = (INT16) v; \
++c; \
goto DO_WHILE; }\
qcoeff_ptr [ 15 ] = (INT16) v; \
goto BLOCK_FINISHED;
#define DECODE_SIGN_WRITE_COEFF_AND_CHECK_EXIT_8x8_2(val) \
DECODE_AND_APPLYSIGN(val) \
Prob = coef_probs + (ENTROPY_NODES*2); \
if(c < 3){\
qcoeff_ptr [ scan[c] ] = (INT16) v; \
++c; \
goto DO_WHILE_8x8; }\
qcoeff_ptr [ scan[3] ] = (INT16) v; \
goto BLOCK_FINISHED_8x8;
#define DECODE_SIGN_WRITE_COEFF_AND_CHECK_EXIT_8x8(val) \
DECODE_AND_APPLYSIGN(val) \
Prob = coef_probs + (ENTROPY_NODES*2); \
if(c < 63){\
qcoeff_ptr [ scan[c] ] = (INT16) v; \
++c; \
goto DO_WHILE_8x8; }\
qcoeff_ptr [ scan[63] ] = (INT16) v; \
goto BLOCK_FINISHED_8x8;
#define DECODE_EXTRABIT_AND_ADJUST_VAL(prob, bits_count)\
split = 1 + (((range-1) * prob) >> 8); \
bigsplit = (VP8_BD_VALUE)split << (VP8_BD_VALUE_SIZE - 8); \
FILL \
if(value >= bigsplit)\
{\
range = range-split;\
value = value-bigsplit;\
val += ((UINT16)1<<bits_count);\
}\
else\
{\
range = split;\
}\
NORMALIZE
int vp8_decode_mb_tokens_8x8(VP8D_COMP *dx, MACROBLOCKD *x)
{
ENTROPY_CONTEXT *A = (ENTROPY_CONTEXT *)x->above_context;
ENTROPY_CONTEXT *L = (ENTROPY_CONTEXT *)x->left_context;
const VP8_COMMON *const oc = & dx->common;
BOOL_DECODER *bc = x->current_bc;
char *eobs = x->eobs;
ENTROPY_CONTEXT *a;
ENTROPY_CONTEXT *l;
int i;
int eobtotal = 0;
register int count;
const BOOL_DATA *bufptr;
const BOOL_DATA *bufend;
register unsigned int range;
VP8_BD_VALUE value;
const int *scan;//
register unsigned int shift;
UINT32 split;
VP8_BD_VALUE bigsplit;
INT16 *qcoeff_ptr;
const vp8_prob *coef_probs;//
int type;
int stop;
INT16 val, bits_count;
INT16 c;
INT16 v;
const vp8_prob *Prob;//
int seg_eob;
int segment_id = x->mode_info_context->mbmi.segment_id;
type = 3;
i = 0;
stop = 16;
scan = vp8_default_zig_zag1d_8x8;
qcoeff_ptr = &x->qcoeff[0];
if (x->mode_info_context->mbmi.mode != B_PRED && x->mode_info_context->mbmi.mode != SPLITMV)
{
i = 24;
stop = 24;
type = 1;
qcoeff_ptr += 24*16;
eobtotal -= 4;
scan = vp8_default_zig_zag1d;
}
bufend = bc->user_buffer_end;
bufptr = bc->user_buffer;
value = bc->value;
count = bc->count;
range = bc->range;
coef_probs = oc->fc.coef_probs_8x8 [type] [ 0 ] [0];
BLOCK_LOOP_8x8:
a = A + vp8_block2above_8x8[i];
l = L + vp8_block2left_8x8[i];
c = (INT16)(!type);
// Dest = ((A)!=0) + ((B)!=0);
if(i==24)
{
VP8_COMBINEENTROPYCONTEXTS(v, *a, *l);
if ( segfeature_active( x, segment_id, SEG_LVL_EOB ) )
{
seg_eob = get_segdata( x, segment_id, SEG_LVL_EOB );
}
else
seg_eob = 4;
}
else
{
VP8_COMBINEENTROPYCONTEXTS(v, *a, *l);
if ( segfeature_active( x, segment_id, SEG_LVL_EOB ) )
{
seg_eob = get_segdata( x, segment_id, SEG_LVL_EOB );
}
else
seg_eob = 64;
}
Prob = coef_probs;
Prob += v * ENTROPY_NODES;
DO_WHILE_8x8:
if ( c == seg_eob )
goto BLOCK_FINISHED_8x8;
if(i==24)
Prob += coef_bands_x[c];
else
Prob += coef_bands_x_8x8[c];
DECODE_AND_BRANCH_IF_ZERO(Prob[EOB_CONTEXT_NODE], BLOCK_FINISHED_8x8);
CHECK_0_8x8_:
if (i==24)
{
DECODE_AND_LOOP_IF_ZERO_8x8_2(Prob[ZERO_CONTEXT_NODE], CHECK_0_8x8_);
}
else
{
DECODE_AND_LOOP_IF_ZERO_8X8(Prob[ZERO_CONTEXT_NODE], CHECK_0_8x8_);
}
DECODE_AND_BRANCH_IF_ZERO(Prob[ONE_CONTEXT_NODE], ONE_CONTEXT_NODE_0_8x8_);
DECODE_AND_BRANCH_IF_ZERO(Prob[LOW_VAL_CONTEXT_NODE],
LOW_VAL_CONTEXT_NODE_0_8x8_);
DECODE_AND_BRANCH_IF_ZERO(Prob[HIGH_LOW_CONTEXT_NODE],
HIGH_LOW_CONTEXT_NODE_0_8x8_);
DECODE_AND_BRANCH_IF_ZERO(Prob[CAT_THREEFOUR_CONTEXT_NODE],
CAT_THREEFOUR_CONTEXT_NODE_0_8x8_);
DECODE_AND_BRANCH_IF_ZERO(Prob[CAT_FIVE_CONTEXT_NODE],
CAT_FIVE_CONTEXT_NODE_0_8x8_);
val = CAT6_MIN_VAL;
bits_count = 12;
do
{
DECODE_EXTRABIT_AND_ADJUST_VAL(cat6_prob[bits_count], bits_count);
bits_count -- ;
}
while (bits_count >= 0);
if(i==24)
{
DECODE_SIGN_WRITE_COEFF_AND_CHECK_EXIT_8x8_2(val);
}
else
{
DECODE_SIGN_WRITE_COEFF_AND_CHECK_EXIT_8x8(val);
}
CAT_FIVE_CONTEXT_NODE_0_8x8_:
val = CAT5_MIN_VAL;
DECODE_EXTRABIT_AND_ADJUST_VAL(CAT5_PROB4, 4);
DECODE_EXTRABIT_AND_ADJUST_VAL(CAT5_PROB3, 3);
DECODE_EXTRABIT_AND_ADJUST_VAL(CAT5_PROB2, 2);
DECODE_EXTRABIT_AND_ADJUST_VAL(CAT5_PROB1, 1);
DECODE_EXTRABIT_AND_ADJUST_VAL(CAT5_PROB0, 0);
if(i==24)
{
DECODE_SIGN_WRITE_COEFF_AND_CHECK_EXIT_8x8_2(val);
}
else
{
DECODE_SIGN_WRITE_COEFF_AND_CHECK_EXIT_8x8(val);
}
CAT_THREEFOUR_CONTEXT_NODE_0_8x8_:
DECODE_AND_BRANCH_IF_ZERO(Prob[CAT_THREE_CONTEXT_NODE],
CAT_THREE_CONTEXT_NODE_0_8x8_);
val = CAT4_MIN_VAL;
DECODE_EXTRABIT_AND_ADJUST_VAL(CAT4_PROB3, 3);
DECODE_EXTRABIT_AND_ADJUST_VAL(CAT4_PROB2, 2);
DECODE_EXTRABIT_AND_ADJUST_VAL(CAT4_PROB1, 1);
DECODE_EXTRABIT_AND_ADJUST_VAL(CAT4_PROB0, 0);
if(i==24)
{
DECODE_SIGN_WRITE_COEFF_AND_CHECK_EXIT_8x8_2(val);
}
else
{
DECODE_SIGN_WRITE_COEFF_AND_CHECK_EXIT_8x8(val);
}
CAT_THREE_CONTEXT_NODE_0_8x8_:
val = CAT3_MIN_VAL;
DECODE_EXTRABIT_AND_ADJUST_VAL(CAT3_PROB2, 2);
DECODE_EXTRABIT_AND_ADJUST_VAL(CAT3_PROB1, 1);
DECODE_EXTRABIT_AND_ADJUST_VAL(CAT3_PROB0, 0);
if(i==24)
{
DECODE_SIGN_WRITE_COEFF_AND_CHECK_EXIT_8x8_2(val);
}
else
{
DECODE_SIGN_WRITE_COEFF_AND_CHECK_EXIT_8x8(val);
}
HIGH_LOW_CONTEXT_NODE_0_8x8_:
DECODE_AND_BRANCH_IF_ZERO(Prob[CAT_ONE_CONTEXT_NODE],
CAT_ONE_CONTEXT_NODE_0_8x8_);
val = CAT2_MIN_VAL;
DECODE_EXTRABIT_AND_ADJUST_VAL(CAT2_PROB1, 1);
DECODE_EXTRABIT_AND_ADJUST_VAL(CAT2_PROB0, 0);
if(i==24)
{
DECODE_SIGN_WRITE_COEFF_AND_CHECK_EXIT_8x8_2(val);
}
else
{
DECODE_SIGN_WRITE_COEFF_AND_CHECK_EXIT_8x8(val);
}
CAT_ONE_CONTEXT_NODE_0_8x8_:
val = CAT1_MIN_VAL;
DECODE_EXTRABIT_AND_ADJUST_VAL(CAT1_PROB0, 0);
if(i==24)
{
DECODE_SIGN_WRITE_COEFF_AND_CHECK_EXIT_8x8_2(val);
}
else
{
DECODE_SIGN_WRITE_COEFF_AND_CHECK_EXIT_8x8(val);
}
LOW_VAL_CONTEXT_NODE_0_8x8_:
DECODE_AND_BRANCH_IF_ZERO(Prob[TWO_CONTEXT_NODE],
TWO_CONTEXT_NODE_0_8x8_);
DECODE_AND_BRANCH_IF_ZERO(Prob[THREE_CONTEXT_NODE],
THREE_CONTEXT_NODE_0_8x8_);
if(i==24)
{
DECODE_SIGN_WRITE_COEFF_AND_CHECK_EXIT_8x8_2(4);
}
else
{
DECODE_SIGN_WRITE_COEFF_AND_CHECK_EXIT_8x8(4);
}
THREE_CONTEXT_NODE_0_8x8_:
if(i==24)
{
DECODE_SIGN_WRITE_COEFF_AND_CHECK_EXIT_8x8_2(3);
}
else
{
DECODE_SIGN_WRITE_COEFF_AND_CHECK_EXIT_8x8(3);
}
TWO_CONTEXT_NODE_0_8x8_:
if(i==24)
{
DECODE_SIGN_WRITE_COEFF_AND_CHECK_EXIT_8x8_2(2);
}
else
{
DECODE_SIGN_WRITE_COEFF_AND_CHECK_EXIT_8x8(2);
}
ONE_CONTEXT_NODE_0_8x8_:
DECODE_AND_APPLYSIGN(1);
Prob = coef_probs + ENTROPY_NODES;
if (i==24)
{
if (c < 3)//15
{
qcoeff_ptr [ scan[c] ] = (INT16) v;
++c;
goto DO_WHILE_8x8;
}
}
else
{
if (c < 63)
{
qcoeff_ptr [ scan[c] ] = (INT16) v;
++c;
goto DO_WHILE_8x8;
}
}
if(i==24)
qcoeff_ptr [ scan[3] ] = (INT16) v;//15
else
qcoeff_ptr [ scan[63] ] = (INT16) v;
BLOCK_FINISHED_8x8:
*a = *l = ((eobs[i] = c) != !type); // any nonzero data?
if (i!=24)
{
*(a + 1) = *a;
*(l + 1) = *l;
}
eobtotal += c;
qcoeff_ptr += (i==24 ? 16 : 64);
i+=4;
if (i < stop)
goto BLOCK_LOOP_8x8;
if (i > 24)
{
type = 0;
i = 0;
stop = 16;
coef_probs = oc->fc.coef_probs_8x8 [type] [ 0 ] [0];
qcoeff_ptr -= (24*16 + 16);
scan = vp8_default_zig_zag1d_8x8;
goto BLOCK_LOOP_8x8;
}
if (i == 16)
{
type = 2;
coef_probs = oc->fc.coef_probs_8x8 [type] [ 0 ] [0];
stop = 24;
goto BLOCK_LOOP_8x8;
}
FILL
bc->user_buffer = bufptr;
bc->value = value;
bc->count = count;
bc->range = range;
return eobtotal;
}
int vp8_decode_mb_tokens(VP8D_COMP *dx, MACROBLOCKD *xd)
{
ENTROPY_CONTEXT *A = (ENTROPY_CONTEXT *)xd->above_context;
ENTROPY_CONTEXT *L = (ENTROPY_CONTEXT *)xd->left_context;
const FRAME_CONTEXT * const fc = &dx->common.fc;
BOOL_DECODER *bc = xd->current_bc;
char *eobs = xd->eobs;
ENTROPY_CONTEXT *a;
ENTROPY_CONTEXT *l;
int i;
int eobtotal = 0;
register int count;
const BOOL_DATA *bufptr;
const BOOL_DATA *bufend;
register unsigned int range;
VP8_BD_VALUE value;
const int *scan;
register unsigned int shift;
UINT32 split;
VP8_BD_VALUE bigsplit;
INT16 *qcoeff_ptr;
const vp8_prob *coef_probs;
int type;
int stop;
INT16 val, bits_count;
INT16 c;
INT16 v;
const vp8_prob *Prob;
int seg_eob = 16;
int segment_id = xd->mode_info_context->mbmi.segment_id;
if ( segfeature_active( xd, segment_id, SEG_LVL_EOB ) )
{
seg_eob = get_segdata( xd, segment_id, SEG_LVL_EOB );
}
type = 3;
i = 0;
stop = 16;
scan = vp8_default_zig_zag1d;
qcoeff_ptr = &xd->qcoeff[0];
if (xd->mode_info_context->mbmi.mode != B_PRED &&
xd->mode_info_context->mbmi.mode != I8X8_PRED &&
xd->mode_info_context->mbmi.mode != SPLITMV)
{
i = 24;
stop = 24;
type = 1;
qcoeff_ptr += 24*16;
eobtotal -= 16;
}
bufend = bc->user_buffer_end;
bufptr = bc->user_buffer;
value = bc->value;
count = bc->count;
range = bc->range;
coef_probs = fc->coef_probs [type] [ 0 ] [0];
BLOCK_LOOP:
a = A + vp8_block2above[i];
l = L + vp8_block2left[i];
c = (INT16)(!type);
/*Dest = ((A)!=0) + ((B)!=0);*/
VP8_COMBINEENTROPYCONTEXTS(v, *a, *l);
Prob = coef_probs;
Prob += v * ENTROPY_NODES;
DO_WHILE:
if ( c == seg_eob )
goto BLOCK_FINISHED;
Prob += coef_bands_x[c];
DECODE_AND_BRANCH_IF_ZERO(Prob[EOB_CONTEXT_NODE], BLOCK_FINISHED);
CHECK_0_:
DECODE_AND_LOOP_IF_ZERO(Prob[ZERO_CONTEXT_NODE], CHECK_0_);
DECODE_AND_BRANCH_IF_ZERO(Prob[ONE_CONTEXT_NODE], ONE_CONTEXT_NODE_0_);
DECODE_AND_BRANCH_IF_ZERO(Prob[LOW_VAL_CONTEXT_NODE],
LOW_VAL_CONTEXT_NODE_0_);
DECODE_AND_BRANCH_IF_ZERO(Prob[HIGH_LOW_CONTEXT_NODE],
HIGH_LOW_CONTEXT_NODE_0_);
DECODE_AND_BRANCH_IF_ZERO(Prob[CAT_THREEFOUR_CONTEXT_NODE],
CAT_THREEFOUR_CONTEXT_NODE_0_);
DECODE_AND_BRANCH_IF_ZERO(Prob[CAT_FIVE_CONTEXT_NODE],
CAT_FIVE_CONTEXT_NODE_0_);
val = CAT6_MIN_VAL;
bits_count = 12;
do
{
DECODE_EXTRABIT_AND_ADJUST_VAL(cat6_prob[bits_count], bits_count);
bits_count -- ;
}
while (bits_count >= 0);
DECODE_SIGN_WRITE_COEFF_AND_CHECK_EXIT(val);
CAT_FIVE_CONTEXT_NODE_0_:
val = CAT5_MIN_VAL;
DECODE_EXTRABIT_AND_ADJUST_VAL(CAT5_PROB4, 4);
DECODE_EXTRABIT_AND_ADJUST_VAL(CAT5_PROB3, 3);
DECODE_EXTRABIT_AND_ADJUST_VAL(CAT5_PROB2, 2);
DECODE_EXTRABIT_AND_ADJUST_VAL(CAT5_PROB1, 1);
DECODE_EXTRABIT_AND_ADJUST_VAL(CAT5_PROB0, 0);
DECODE_SIGN_WRITE_COEFF_AND_CHECK_EXIT(val);
CAT_THREEFOUR_CONTEXT_NODE_0_:
DECODE_AND_BRANCH_IF_ZERO(Prob[CAT_THREE_CONTEXT_NODE],
CAT_THREE_CONTEXT_NODE_0_);
val = CAT4_MIN_VAL;
DECODE_EXTRABIT_AND_ADJUST_VAL(CAT4_PROB3, 3);
DECODE_EXTRABIT_AND_ADJUST_VAL(CAT4_PROB2, 2);
DECODE_EXTRABIT_AND_ADJUST_VAL(CAT4_PROB1, 1);
DECODE_EXTRABIT_AND_ADJUST_VAL(CAT4_PROB0, 0);
DECODE_SIGN_WRITE_COEFF_AND_CHECK_EXIT(val);
CAT_THREE_CONTEXT_NODE_0_:
val = CAT3_MIN_VAL;
DECODE_EXTRABIT_AND_ADJUST_VAL(CAT3_PROB2, 2);
DECODE_EXTRABIT_AND_ADJUST_VAL(CAT3_PROB1, 1);
DECODE_EXTRABIT_AND_ADJUST_VAL(CAT3_PROB0, 0);
DECODE_SIGN_WRITE_COEFF_AND_CHECK_EXIT(val);
HIGH_LOW_CONTEXT_NODE_0_:
DECODE_AND_BRANCH_IF_ZERO(Prob[CAT_ONE_CONTEXT_NODE],
CAT_ONE_CONTEXT_NODE_0_);
val = CAT2_MIN_VAL;
DECODE_EXTRABIT_AND_ADJUST_VAL(CAT2_PROB1, 1);
DECODE_EXTRABIT_AND_ADJUST_VAL(CAT2_PROB0, 0);
DECODE_SIGN_WRITE_COEFF_AND_CHECK_EXIT(val);
CAT_ONE_CONTEXT_NODE_0_:
val = CAT1_MIN_VAL;
DECODE_EXTRABIT_AND_ADJUST_VAL(CAT1_PROB0, 0);
DECODE_SIGN_WRITE_COEFF_AND_CHECK_EXIT(val);
LOW_VAL_CONTEXT_NODE_0_:
DECODE_AND_BRANCH_IF_ZERO(Prob[TWO_CONTEXT_NODE], TWO_CONTEXT_NODE_0_);
DECODE_AND_BRANCH_IF_ZERO(Prob[THREE_CONTEXT_NODE], THREE_CONTEXT_NODE_0_);
DECODE_SIGN_WRITE_COEFF_AND_CHECK_EXIT(4);
THREE_CONTEXT_NODE_0_:
DECODE_SIGN_WRITE_COEFF_AND_CHECK_EXIT(3);
TWO_CONTEXT_NODE_0_:
DECODE_SIGN_WRITE_COEFF_AND_CHECK_EXIT(2);
ONE_CONTEXT_NODE_0_:
DECODE_AND_APPLYSIGN(1);
Prob = coef_probs + ENTROPY_NODES;
if (c < 15)
{
qcoeff_ptr [ scan[c] ] = (INT16) v;
++c;
goto DO_WHILE;
}
qcoeff_ptr [ 15 ] = (INT16) v;
BLOCK_FINISHED:
*a = *l = ((eobs[i] = c) != !type); /* any nonzero data? */
eobtotal += c;
qcoeff_ptr += 16;
i++;
if (i < stop)
goto BLOCK_LOOP;
if (i == 25)
{
type = 0;
i = 0;
stop = 16;
coef_probs = fc->coef_probs [type] [ 0 ] [0];
qcoeff_ptr -= (24*16 + 16);
goto BLOCK_LOOP;
}
if (i == 16)
{
type = 2;
coef_probs = fc->coef_probs [type] [ 0 ] [0];
stop = 24;
goto BLOCK_LOOP;
}
FILL
bc->user_buffer = bufptr;
bc->value = value;
bc->count = count;
bc->range = range;
return eobtotal;
}
Reference in New Issue View Git Blame Copy Permalink