ref: b7c5d80212de672545278564b40e55be0ce1b1b4
dir: /vp8/decoder/detokenize.c/
/*
* Copyright (c) 2010 The VP8 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 "type_aliases.h"
#include "blockd.h"
#include "onyxd_int.h"
#include "vpx_mem/vpx_mem.h"
#include "vpx_ports/mem.h"
#define BR_COUNT 8
#define BOOL_DATA UINT8
#define OCB_X PREV_COEF_CONTEXTS * ENTROPY_NODES
DECLARE_ALIGNED(16, UINT16, vp8_coef_bands_x[16]) = { 0, 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};
#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
/*
//the definition is put in "onyxd_int.h"
typedef struct
{
INT16 min_val;
INT16 Length;
UINT8 Probs[12];
} TOKENEXTRABITS;
*/
DECLARE_ALIGNED(16, static const TOKENEXTRABITS, vp8d_token_extra_bits2[MAX_ENTROPY_TOKENS]) =
{
{ 0, -1, { 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 } }, //ZERO_TOKEN
{ 1, 0, { 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 } }, //ONE_TOKEN
{ 2, 0, { 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 } }, //TWO_TOKEN
{ 3, 0, { 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 } }, //THREE_TOKEN
{ 4, 0, { 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 } }, //FOUR_TOKEN
{ 5, 0, { 159, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 } }, //DCT_VAL_CATEGORY1
{ 7, 1, { 145, 165, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 } }, //DCT_VAL_CATEGORY2
{ 11, 2, { 140, 148, 173, 0, 0, 0, 0, 0, 0, 0, 0, 0 } }, //DCT_VAL_CATEGORY3
{ 19, 3, { 135, 140, 155, 176, 0, 0, 0, 0, 0, 0, 0, 0 } }, //DCT_VAL_CATEGORY4
{ 35, 4, { 130, 134, 141, 157, 180, 0, 0, 0, 0, 0, 0, 0 } }, //DCT_VAL_CATEGORY5
{ 67, 10, { 129, 130, 133, 140, 153, 177, 196, 230, 243, 254, 254, 0 } }, //DCT_VAL_CATEGORY6
{ 0, -1, { 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 } }, // EOB TOKEN
};
void vp8_reset_mb_tokens_context(MACROBLOCKD *x)
{
ENTROPY_CONTEXT **const A = x->above_context;
ENTROPY_CONTEXT(* const L)[4] = x->left_context;
ENTROPY_CONTEXT *a;
ENTROPY_CONTEXT *l;
/* Clear entropy contexts for Y blocks */
a = A[Y1CONTEXT];
l = L[Y1CONTEXT];
*a = 0;
*(a+1) = 0;
*(a+2) = 0;
*(a+3) = 0;
*l = 0;
*(l+1) = 0;
*(l+2) = 0;
*(l+3) = 0;
/* Clear entropy contexts for U blocks */
a = A[UCONTEXT];
l = L[UCONTEXT];
*a = 0;
*(a+1) = 0;
*l = 0;
*(l+1) = 0;
/* Clear entropy contexts for V blocks */
a = A[VCONTEXT];
l = L[VCONTEXT];
*a = 0;
*(a+1) = 0;
*l = 0;
*(l+1) = 0;
/* Clear entropy contexts for Y2 blocks */
if (x->mbmi.mode != B_PRED && x->mbmi.mode != SPLITMV)
{
a = A[Y2CONTEXT];
l = L[Y2CONTEXT];
*a = 0;
*l = 0;
}
}
DECLARE_ALIGNED(16, extern const unsigned int, vp8dx_bitreader_norm[256]);
#define NORMALIZE \
/*if(range < 0x80)*/ \
{ \
shift = vp8dx_bitreader_norm[range]; \
range <<= shift; \
value <<= shift; \
count -= shift; \
if(count <= 0) \
{ \
count += BR_COUNT ; \
value |= (*bufptr) << (BR_COUNT-count); \
bufptr = br_ptr_advance(bufptr, 1); \
} \
}
#define DECODE_AND_APPLYSIGN(value_to_sign) \
split = (range + 1) >> 1; \
if ( (value >> 8) < split ) \
{ \
range = split; \
v= value_to_sign; \
} \
else \
{ \
range = range-split; \
value = value-(split<<8); \
v = -value_to_sign; \
} \
range +=range; \
value +=value; \
if (!--count) \
{ \
count = BR_COUNT; \
value |= *bufptr; \
bufptr = br_ptr_advance(bufptr, 1); \
}
#define DECODE_AND_BRANCH_IF_ZERO(probability,branch) \
{ \
split = 1 + ((( probability*(range-1) ) )>> 8); \
if ( (value >> 8) < split ) \
{ \
range = split; \
NORMALIZE \
goto branch; \
} \
value -= (split<<8); \
range = range - split; \
NORMALIZE \
}
#define DECODE_AND_LOOP_IF_ZERO(probability,branch) \
{ \
split = 1 + ((( probability*(range-1) ) ) >> 8); \
if ( (value >> 8) < split ) \
{ \
range = split; \
NORMALIZE \
Prob = coef_probs; \
if(c<15) {\
++c; \
Prob += vp8_coef_bands_x[c]; \
goto branch; \
} goto BLOCK_FINISHED; /*for malformed input */\
} \
value -= (split<<8); \
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 [ scan[15] ] = (INT16) v; \
goto BLOCK_FINISHED;
#define DECODE_EXTRABIT_AND_ADJUST_VAL(t,bits_count)\
split = 1 + (((range-1) * vp8d_token_extra_bits2[t].Probs[bits_count]) >> 8); \
if(value >= (split<<8))\
{\
range = range-split;\
value = value-(split<<8);\
val += ((UINT16)1<<bits_count);\
}\
else\
{\
range = split;\
}\
NORMALIZE
int vp8_decode_mb_tokens(VP8D_COMP *dx, MACROBLOCKD *x)
{
ENTROPY_CONTEXT **const A = x->above_context;
ENTROPY_CONTEXT(* const L)[4] = x->left_context;
const VP8_COMMON *const oc = & dx->common;
BOOL_DECODER *bc = x->current_bc;
ENTROPY_CONTEXT *a;
ENTROPY_CONTEXT *l;
int i;
int eobtotal = 0;
register int count;
const BOOL_DATA *bufptr;
register unsigned int range;
register unsigned int value;
const int *scan;
register unsigned int shift;
UINT32 split;
INT16 *qcoeff_ptr;
const vp8_prob *coef_probs;
int type;
int stop;
INT16 val, bits_count;
INT16 c;
INT16 t;
INT16 v;
const vp8_prob *Prob;
//int *scan;
type = 3;
i = 0;
stop = 16;
if (x->mbmi.mode != B_PRED && x->mbmi.mode != SPLITMV)
{
i = 24;
stop = 24;
type = 1;
qcoeff_ptr = &x->qcoeff[24*16];
scan = vp8_default_zig_zag1d;
eobtotal -= 16;
}
else
{
scan = vp8_default_zig_zag1d;
qcoeff_ptr = &x->qcoeff[0];
}
count = bc->count;
range = bc->range;
value = bc->value;
bufptr = bc->read_ptr;
coef_probs = oc->fc.coef_probs [type] [ 0 ] [0];
BLOCK_LOOP:
a = A[ vp8_block2context[i] ] + vp8_block2above[i];
l = L[ vp8_block2context[i] ] + vp8_block2left[i];
c = (INT16)(!type);
VP8_COMBINEENTROPYCONTEXTS(t, *a, *l);
Prob = coef_probs;
Prob += t * ENTROPY_NODES;
DO_WHILE:
Prob += vp8_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 = vp8d_token_extra_bits2[DCT_VAL_CATEGORY6].min_val;
bits_count = vp8d_token_extra_bits2[DCT_VAL_CATEGORY6].Length;
do
{
DECODE_EXTRABIT_AND_ADJUST_VAL(DCT_VAL_CATEGORY6, bits_count);
bits_count -- ;
}
while (bits_count >= 0);
DECODE_SIGN_WRITE_COEFF_AND_CHECK_EXIT(val);
CAT_FIVE_CONTEXT_NODE_0_:
val = vp8d_token_extra_bits2[DCT_VAL_CATEGORY5].min_val;
DECODE_EXTRABIT_AND_ADJUST_VAL(DCT_VAL_CATEGORY5, 4);
DECODE_EXTRABIT_AND_ADJUST_VAL(DCT_VAL_CATEGORY5, 3);
DECODE_EXTRABIT_AND_ADJUST_VAL(DCT_VAL_CATEGORY5, 2);
DECODE_EXTRABIT_AND_ADJUST_VAL(DCT_VAL_CATEGORY5, 1);
DECODE_EXTRABIT_AND_ADJUST_VAL(DCT_VAL_CATEGORY5, 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 = vp8d_token_extra_bits2[DCT_VAL_CATEGORY4].min_val;
DECODE_EXTRABIT_AND_ADJUST_VAL(DCT_VAL_CATEGORY4, 3);
DECODE_EXTRABIT_AND_ADJUST_VAL(DCT_VAL_CATEGORY4, 2);
DECODE_EXTRABIT_AND_ADJUST_VAL(DCT_VAL_CATEGORY4, 1);
DECODE_EXTRABIT_AND_ADJUST_VAL(DCT_VAL_CATEGORY4, 0);
DECODE_SIGN_WRITE_COEFF_AND_CHECK_EXIT(val);
CAT_THREE_CONTEXT_NODE_0_:
val = vp8d_token_extra_bits2[DCT_VAL_CATEGORY3].min_val;
DECODE_EXTRABIT_AND_ADJUST_VAL(DCT_VAL_CATEGORY3, 2);
DECODE_EXTRABIT_AND_ADJUST_VAL(DCT_VAL_CATEGORY3, 1);
DECODE_EXTRABIT_AND_ADJUST_VAL(DCT_VAL_CATEGORY3, 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 = vp8d_token_extra_bits2[DCT_VAL_CATEGORY2].min_val;
DECODE_EXTRABIT_AND_ADJUST_VAL(DCT_VAL_CATEGORY2, 1);
DECODE_EXTRABIT_AND_ADJUST_VAL(DCT_VAL_CATEGORY2, 0);
DECODE_SIGN_WRITE_COEFF_AND_CHECK_EXIT(val);
CAT_ONE_CONTEXT_NODE_0_:
val = vp8d_token_extra_bits2[DCT_VAL_CATEGORY1].min_val;
DECODE_EXTRABIT_AND_ADJUST_VAL(DCT_VAL_CATEGORY1, 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 [ scan[15] ] = (INT16) v;
BLOCK_FINISHED:
t = ((x->block[i].eob = c) != !type); // any nonzero data?
eobtotal += x->block[i].eob;
*a = *l = t;
qcoeff_ptr += 16;
i++;
if (i < stop)
goto BLOCK_LOOP;
if (i == 25)
{
scan = vp8_default_zig_zag1d;//x->scan_order1d;
type = 0;
i = 0;
stop = 16;
coef_probs = oc->fc.coef_probs [type] [ 0 ] [0];
qcoeff_ptr = &x->qcoeff[0];
goto BLOCK_LOOP;
}
if (i == 16)
{
type = 2;
coef_probs = oc->fc.coef_probs [type] [ 0 ] [0];
stop = 24;
goto BLOCK_LOOP;
}
bc->count = count;
bc->value = value;
bc->range = range;
bc->read_ptr = bufptr;
return eobtotal;
}