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vpx/vp8/encoder/encodemb.c
Yaowu Xu b22cc559b6 Changed to use integer 8x8 dct 
The commit added an integer version of 8x8 forward DCT, based on the
orginal forward DCT from VP6. The constants, roundings, and shifts
were adjusted to improve the accuracy. The latest patch has a very
similar accuracy in term of round trip error against the floating
point version.

It should be noted here that the purpose of the patch is to help
encoding speed and facilitate all other experiments. There will be
futher review in combination with inverse DCT before finalization.

configure with "--enable--int_8x8fdct" to use the integer version

Change-Id: I5a4f80507429f0e07cf02a13768ec81cbfddc5bc
2012-05-15 07:28:26 -07:00

1246 lines
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/*
* 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 "vpx_ports/config.h"
#include "encodemb.h"
#include "vp8/common/reconinter.h"
#include "quantize.h"
#include "tokenize.h"
#include "vp8/common/invtrans.h"
#include "vp8/common/recon.h"
#include "vp8/common/reconintra.h"
#include "dct.h"
#include "vpx_mem/vpx_mem.h"
#include "rdopt.h"
#include "vp8/common/systemdependent.h"
#if CONFIG_RUNTIME_CPU_DETECT
#define IF_RTCD(x) (x)
#else
#define IF_RTCD(x) NULL
#endif
#ifdef ENC_DEBUG
extern int enc_debug;
#endif
void vp8_subtract_b_c(BLOCK *be, BLOCKD *bd, int pitch)
{
unsigned char *src_ptr = (*(be->base_src) + be->src);
short *diff_ptr = be->src_diff;
unsigned char *pred_ptr = bd->predictor;
int src_stride = be->src_stride;
int r, c;
for (r = 0; r < 4; r++)
{
for (c = 0; c < 4; c++)
{
diff_ptr[c] = src_ptr[c] - pred_ptr[c];
}
diff_ptr += pitch;
pred_ptr += pitch;
src_ptr += src_stride;
}
}
void vp8_subtract_4b_c(BLOCK *be, BLOCKD *bd, int pitch)
{
unsigned char *src_ptr = (*(be->base_src) + be->src);
short *diff_ptr = be->src_diff;
unsigned char *pred_ptr = bd->predictor;
int src_stride = be->src_stride;
int r, c;
for (r = 0; r < 8; r++)
{
for (c = 0; c < 8; c++)
{
diff_ptr[c] = src_ptr[c] - pred_ptr[c];
}
diff_ptr += pitch;
pred_ptr += pitch;
src_ptr += src_stride;
}
}
void vp8_subtract_mbuv_c(short *diff, unsigned char *usrc, unsigned char *vsrc, unsigned char *pred, int stride)
{
short *udiff = diff + 256;
short *vdiff = diff + 320;
unsigned char *upred = pred + 256;
unsigned char *vpred = pred + 320;
int r, c;
for (r = 0; r < 8; r++)
{
for (c = 0; c < 8; c++)
{
udiff[c] = usrc[c] - upred[c];
}
udiff += 8;
upred += 8;
usrc += stride;
}
for (r = 0; r < 8; r++)
{
for (c = 0; c < 8; c++)
{
vdiff[c] = vsrc[c] - vpred[c];
}
vdiff += 8;
vpred += 8;
vsrc += stride;
}
}
void vp8_subtract_mby_c(short *diff, unsigned char *src, unsigned char *pred, int stride)
{
int r, c;
for (r = 0; r < 16; r++)
{
for (c = 0; c < 16; c++)
{
diff[c] = src[c] - pred[c];
}
diff += 16;
pred += 16;
src += stride;
}
}
static void vp8_subtract_mb(const VP8_ENCODER_RTCD *rtcd, MACROBLOCK *x)
{
BLOCK *b = &x->block[0];
ENCODEMB_INVOKE(&rtcd->encodemb, submby)(x->src_diff, *(b->base_src), x->e_mbd.predictor, b->src_stride);
ENCODEMB_INVOKE(&rtcd->encodemb, submbuv)(x->src_diff, x->src.u_buffer, x->src.v_buffer, x->e_mbd.predictor, x->src.uv_stride);
}
static void build_dcblock(MACROBLOCK *x)
{
short *src_diff_ptr = &x->src_diff[384];
int i;
for (i = 0; i < 16; i++)
{
src_diff_ptr[i] = x->coeff[i * 16];
}
}
void vp8_build_dcblock_8x8(MACROBLOCK *x)
{
short *src_diff_ptr = &x->src_diff[384];
int i;
for (i = 0; i < 16; i++)
{
src_diff_ptr[i] = 0;
}
src_diff_ptr[0] = x->coeff[0 * 16];
src_diff_ptr[1] = x->coeff[4 * 16];
src_diff_ptr[4] = x->coeff[8 * 16];
src_diff_ptr[8] = x->coeff[12 * 16];
}
void vp8_transform_mbuv(MACROBLOCK *x)
{
int i;
for (i = 16; i < 24; i += 2)
{
x->vp8_short_fdct8x4(&x->block[i].src_diff[0],
&x->block[i].coeff[0], 16);
}
}
void vp8_transform_intra_mby(MACROBLOCK *x)
{
int i;
for (i = 0; i < 16; i += 2)
{
x->vp8_short_fdct8x4(&x->block[i].src_diff[0],
&x->block[i].coeff[0], 32);
}
// build dc block from 16 y dc values
build_dcblock(x);
// do 2nd order transform on the dc block
x->short_walsh4x4(&x->block[24].src_diff[0],
&x->block[24].coeff[0], 8);
}
static void transform_mb(MACROBLOCK *x)
{
int i;
for (i = 0; i < 16; i += 2)
{
x->vp8_short_fdct8x4(&x->block[i].src_diff[0],
&x->block[i].coeff[0], 32);
}
// build dc block from 16 y dc values
if (x->e_mbd.mode_info_context->mbmi.mode != SPLITMV)
build_dcblock(x);
for (i = 16; i < 24; i += 2)
{
x->vp8_short_fdct8x4(&x->block[i].src_diff[0],
&x->block[i].coeff[0], 16);
}
// do 2nd order transform on the dc block
if (x->e_mbd.mode_info_context->mbmi.mode != SPLITMV)
x->short_walsh4x4(&x->block[24].src_diff[0],
&x->block[24].coeff[0], 8);
}
static void transform_mby(MACROBLOCK *x)
{
int i;
for (i = 0; i < 16; i += 2)
{
x->vp8_short_fdct8x4(&x->block[i].src_diff[0],
&x->block[i].coeff[0], 32);
}
// build dc block from 16 y dc values
if (x->e_mbd.mode_info_context->mbmi.mode != SPLITMV)
{
build_dcblock(x);
x->short_walsh4x4(&x->block[24].src_diff[0],
&x->block[24].coeff[0], 8);
}
}
void vp8_transform_mbuv_8x8(MACROBLOCK *x)
{
int i;
#if !CONFIG_INT_8X8FDCT
vp8_clear_system_state();
#endif
for (i = 16; i < 24; i += 4)
{
x->vp8_short_fdct8x8(&x->block[i].src_diff[0],
&x->block[i].coeff[0], 16);
}
}
void vp8_transform_intra_mby_8x8(MACROBLOCK *x)//changed
{
int i;
#if !CONFIG_INT_8X8FDCT
vp8_clear_system_state();
#endif
for (i = 0; i < 9; i += 8)
{
x->vp8_short_fdct8x8(&x->block[i].src_diff[0],
&x->block[i].coeff[0], 32);
}
for (i = 2; i < 11; i += 8)
{
x->vp8_short_fdct8x8(&x->block[i].src_diff[0],
&x->block[i+2].coeff[0], 32);
}
// build dc block from 16 y dc values
vp8_build_dcblock_8x8(x);
//vp8_build_dcblock(x);
// do 2nd order transform on the dc block
x->short_fhaar2x2(&x->block[24].src_diff[0],
&x->block[24].coeff[0], 8);
}
void vp8_transform_mb_8x8(MACROBLOCK *x)
{
int i;
#if !CONFIG_INT_8X8FDCT
vp8_clear_system_state();
#endif
for (i = 0; i < 9; i += 8)
{
x->vp8_short_fdct8x8(&x->block[i].src_diff[0],
&x->block[i].coeff[0], 32);
}
for (i = 2; i < 11; i += 8)
{
x->vp8_short_fdct8x8(&x->block[i].src_diff[0],
&x->block[i+2].coeff[0], 32);
}
// build dc block from 16 y dc values
if (x->e_mbd.mode_info_context->mbmi.mode != B_PRED &&x->e_mbd.mode_info_context->mbmi.mode != SPLITMV)
vp8_build_dcblock_8x8(x);
//vp8_build_dcblock(x);
for (i = 16; i < 24; i += 4)
{
x->vp8_short_fdct8x8(&x->block[i].src_diff[0],
&x->block[i].coeff[0], 16);
}
// do 2nd order transform on the dc block
if (x->e_mbd.mode_info_context->mbmi.mode != B_PRED &&x->e_mbd.mode_info_context->mbmi.mode != SPLITMV)
x->short_fhaar2x2(&x->block[24].src_diff[0],
&x->block[24].coeff[0], 8);
}
void vp8_transform_mby_8x8(MACROBLOCK *x)
{
int i;
#if !CONFIG_INT_8X8FDCT
vp8_clear_system_state();
#endif
for (i = 0; i < 9; i += 8)
{
x->vp8_short_fdct8x8(&x->block[i].src_diff[0],
&x->block[i].coeff[0], 32);
}
for (i = 2; i < 11; i += 8)
{
x->vp8_short_fdct8x8(&x->block[i].src_diff[0],
&x->block[i+2].coeff[0], 32);
}
// build dc block from 16 y dc values
if (x->e_mbd.mode_info_context->mbmi.mode != SPLITMV)
{
//vp8_build_dcblock(x);
vp8_build_dcblock_8x8(x);
x->short_fhaar2x2(&x->block[24].src_diff[0],
&x->block[24].coeff[0], 8);
}
}
#define RDTRUNC(RM,DM,R,D) ( (128+(R)*(RM)) & 0xFF )
#define RDTRUNC_8x8(RM,DM,R,D) ( (128+(R)*(RM)) & 0xFF )
typedef struct vp8_token_state vp8_token_state;
struct vp8_token_state{
int rate;
int error;
signed char next;
signed char token;
short qc;
};
// TODO: experiments to find optimal multiple numbers
#define Y1_RD_MULT 4
#define UV_RD_MULT 2
#define Y2_RD_MULT 4
static const int plane_rd_mult[4]=
{
Y1_RD_MULT,
Y2_RD_MULT,
UV_RD_MULT,
Y1_RD_MULT
};
static void optimize_b(MACROBLOCK *mb, int ib, int type,
ENTROPY_CONTEXT *a, ENTROPY_CONTEXT *l,
const VP8_ENCODER_RTCD *rtcd)
{
BLOCK *b;
BLOCKD *d;
vp8_token_state tokens[17][2];
unsigned best_mask[2];
const short *dequant_ptr;
const short *coeff_ptr;
short *qcoeff_ptr;
short *dqcoeff_ptr;
int eob;
int i0;
int rc;
int x;
int sz = 0;
int next;
int rdmult;
int rddiv;
int final_eob;
int rd_cost0;
int rd_cost1;
int rate0;
int rate1;
int error0;
int error1;
int t0;
int t1;
int best;
int band;
int pt;
int i;
int err_mult = plane_rd_mult[type];
b = &mb->block[ib];
d = &mb->e_mbd.block[ib];
dequant_ptr = d->dequant;
coeff_ptr = b->coeff;
qcoeff_ptr = d->qcoeff;
dqcoeff_ptr = d->dqcoeff;
i0 = !type;
eob = d->eob;
/* Now set up a Viterbi trellis to evaluate alternative roundings. */
rdmult = mb->rdmult * err_mult;
if(mb->e_mbd.mode_info_context->mbmi.ref_frame==INTRA_FRAME)
rdmult = (rdmult * 9)>>4;
rddiv = mb->rddiv;
best_mask[0] = best_mask[1] = 0;
/* Initialize the sentinel node of the trellis. */
tokens[eob][0].rate = 0;
tokens[eob][0].error = 0;
tokens[eob][0].next = 16;
tokens[eob][0].token = DCT_EOB_TOKEN;
tokens[eob][0].qc = 0;
*(tokens[eob] + 1) = *(tokens[eob] + 0);
next = eob;
for (i = eob; i-- > i0;)
{
int base_bits;
int d2;
int dx;
rc = vp8_default_zig_zag1d[i];
x = qcoeff_ptr[rc];
/* Only add a trellis state for non-zero coefficients. */
if (x)
{
int shortcut=0;
error0 = tokens[next][0].error;
error1 = tokens[next][1].error;
/* Evaluate the first possibility for this state. */
rate0 = tokens[next][0].rate;
rate1 = tokens[next][1].rate;
t0 = (vp8_dct_value_tokens_ptr + x)->Token;
/* Consider both possible successor states. */
if (next < 16)
{
band = vp8_coef_bands[i + 1];
pt = vp8_prev_token_class[t0];
rate0 +=
mb->token_costs[type][band][pt][tokens[next][0].token];
rate1 +=
mb->token_costs[type][band][pt][tokens[next][1].token];
}
rd_cost0 = RDCOST(rdmult, rddiv, rate0, error0);
rd_cost1 = RDCOST(rdmult, rddiv, rate1, error1);
if (rd_cost0 == rd_cost1)
{
rd_cost0 = RDTRUNC(rdmult, rddiv, rate0, error0);
rd_cost1 = RDTRUNC(rdmult, rddiv, rate1, error1);
}
/* And pick the best. */
best = rd_cost1 < rd_cost0;
base_bits = *(vp8_dct_value_cost_ptr + x);
dx = dqcoeff_ptr[rc] - coeff_ptr[rc];
d2 = dx*dx;
tokens[i][0].rate = base_bits + (best ? rate1 : rate0);
tokens[i][0].error = d2 + (best ? error1 : error0);
tokens[i][0].next = next;
tokens[i][0].token = t0;
tokens[i][0].qc = x;
best_mask[0] |= best << i;
/* Evaluate the second possibility for this state. */
rate0 = tokens[next][0].rate;
rate1 = tokens[next][1].rate;
if((abs(x)*dequant_ptr[rc]>abs(coeff_ptr[rc])) &&
(abs(x)*dequant_ptr[rc]<abs(coeff_ptr[rc])+dequant_ptr[rc]))
shortcut = 1;
else
shortcut = 0;
if(shortcut)
{
sz = -(x < 0);
x -= 2*sz + 1;
}
/* Consider both possible successor states. */
if (!x)
{
/* If we reduced this coefficient to zero, check to see if
* we need to move the EOB back here.
*/
t0 = tokens[next][0].token == DCT_EOB_TOKEN ?
DCT_EOB_TOKEN : ZERO_TOKEN;
t1 = tokens[next][1].token == DCT_EOB_TOKEN ?
DCT_EOB_TOKEN : ZERO_TOKEN;
}
else
{
t0=t1 = (vp8_dct_value_tokens_ptr + x)->Token;
}
if (next < 16)
{
band = vp8_coef_bands[i + 1];
if(t0!=DCT_EOB_TOKEN)
{
pt = vp8_prev_token_class[t0];
rate0 += mb->token_costs[type][band][pt][
tokens[next][0].token];
}
if(t1!=DCT_EOB_TOKEN)
{
pt = vp8_prev_token_class[t1];
rate1 += mb->token_costs[type][band][pt][
tokens[next][1].token];
}
}
rd_cost0 = RDCOST(rdmult, rddiv, rate0, error0);
rd_cost1 = RDCOST(rdmult, rddiv, rate1, error1);
if (rd_cost0 == rd_cost1)
{
rd_cost0 = RDTRUNC(rdmult, rddiv, rate0, error0);
rd_cost1 = RDTRUNC(rdmult, rddiv, rate1, error1);
}
/* And pick the best. */
best = rd_cost1 < rd_cost0;
base_bits = *(vp8_dct_value_cost_ptr + x);
if(shortcut)
{
dx -= (dequant_ptr[rc] + sz) ^ sz;
d2 = dx*dx;
}
tokens[i][1].rate = base_bits + (best ? rate1 : rate0);
tokens[i][1].error = d2 + (best ? error1 : error0);
tokens[i][1].next = next;
tokens[i][1].token =best?t1:t0;
tokens[i][1].qc = x;
best_mask[1] |= best << i;
/* Finally, make this the new head of the trellis. */
next = i;
}
/* There's no choice to make for a zero coefficient, so we don't
* add a new trellis node, but we do need to update the costs.
*/
else
{
band = vp8_coef_bands[i + 1];
t0 = tokens[next][0].token;
t1 = tokens[next][1].token;
/* Update the cost of each path if we're past the EOB token. */
if (t0 != DCT_EOB_TOKEN)
{
tokens[next][0].rate += mb->token_costs[type][band][0][t0];
tokens[next][0].token = ZERO_TOKEN;
}
if (t1 != DCT_EOB_TOKEN)
{
tokens[next][1].rate += mb->token_costs[type][band][0][t1];
tokens[next][1].token = ZERO_TOKEN;
}
/* Don't update next, because we didn't add a new node. */
}
}
/* Now pick the best path through the whole trellis. */
band = vp8_coef_bands[i + 1];
VP8_COMBINEENTROPYCONTEXTS(pt, *a, *l);
rate0 = tokens[next][0].rate;
rate1 = tokens[next][1].rate;
error0 = tokens[next][0].error;
error1 = tokens[next][1].error;
t0 = tokens[next][0].token;
t1 = tokens[next][1].token;
rate0 += mb->token_costs[type][band][pt][t0];
rate1 += mb->token_costs[type][band][pt][t1];
rd_cost0 = RDCOST(rdmult, rddiv, rate0, error0);
rd_cost1 = RDCOST(rdmult, rddiv, rate1, error1);
if (rd_cost0 == rd_cost1)
{
rd_cost0 = RDTRUNC(rdmult, rddiv, rate0, error0);
rd_cost1 = RDTRUNC(rdmult, rddiv, rate1, error1);
}
best = rd_cost1 < rd_cost0;
final_eob = i0 - 1;
for (i = next; i < eob; i = next)
{
x = tokens[i][best].qc;
if (x)
final_eob = i;
rc = vp8_default_zig_zag1d[i];
qcoeff_ptr[rc] = x;
dqcoeff_ptr[rc] = x * dequant_ptr[rc];
next = tokens[i][best].next;
best = (best_mask[best] >> i) & 1;
}
final_eob++;
d->eob = final_eob;
*a = *l = (d->eob != !type);
}
/**************************************************************************
our inverse hadamard transform effectively is weighted sum of all 16 inputs
with weight either 1 or -1. It has a last stage scaling of (sum+1)>>2. And
dc only idct is (dc+16)>>5. So if all the sums are between -65 and 63 the
output after inverse wht and idct will be all zero. A sum of absolute value
smaller than 65 guarantees all 16 different (+1/-1) weighted sums in wht
fall between -65 and +65.
**************************************************************************/
#define SUM_2ND_COEFF_THRESH 65
static void check_reset_2nd_coeffs(MACROBLOCKD *x, int type,
ENTROPY_CONTEXT *a, ENTROPY_CONTEXT *l)
{
int sum=0;
int i;
BLOCKD *bd = &x->block[24];
if(bd->dequant[0]>=SUM_2ND_COEFF_THRESH
&& bd->dequant[1]>=SUM_2ND_COEFF_THRESH)
return;
for(i=0;i<bd->eob;i++)
{
int coef = bd->dqcoeff[vp8_default_zig_zag1d[i]];
sum+= (coef>=0)?coef:-coef;
if(sum>=SUM_2ND_COEFF_THRESH)
return;
}
if(sum < SUM_2ND_COEFF_THRESH)
{
for(i=0;i<bd->eob;i++)
{
int rc = vp8_default_zig_zag1d[i];
bd->qcoeff[rc]=0;
bd->dqcoeff[rc]=0;
}
bd->eob = 0;
*a = *l = (bd->eob != !type);
}
}
#define SUM_2ND_COEFF_THRESH_8X8 32
static void check_reset_8x8_2nd_coeffs(MACROBLOCKD *x, int type,
ENTROPY_CONTEXT *a, ENTROPY_CONTEXT *l)
{
int sum=0;
BLOCKD *bd = &x->block[24];
int coef;
coef = bd->dqcoeff[0];
sum+= (coef>=0)?coef:-coef;
coef = bd->dqcoeff[1];
sum+= (coef>=0)?coef:-coef;
coef = bd->dqcoeff[4];
sum+= (coef>=0)?coef:-coef;
coef = bd->dqcoeff[8];
sum+= (coef>=0)?coef:-coef;
if(sum < SUM_2ND_COEFF_THRESH_8X8)
{
bd->qcoeff[0] = 0;
bd->dqcoeff[0] = 0;
bd->qcoeff[1] = 0;
bd->dqcoeff[1] = 0;
bd->qcoeff[4] = 0;
bd->dqcoeff[4] = 0;
bd->qcoeff[8] = 0;
bd->dqcoeff[8] = 0;
bd->eob = 0;
*a = *l = (bd->eob != !type);
}
}
static void optimize_mb(MACROBLOCK *x, const VP8_ENCODER_RTCD *rtcd)
{
int b;
int type;
int has_2nd_order;
ENTROPY_CONTEXT_PLANES t_above, t_left;
ENTROPY_CONTEXT *ta;
ENTROPY_CONTEXT *tl;
vpx_memcpy(&t_above, x->e_mbd.above_context, sizeof(ENTROPY_CONTEXT_PLANES));
vpx_memcpy(&t_left, x->e_mbd.left_context, sizeof(ENTROPY_CONTEXT_PLANES));
ta = (ENTROPY_CONTEXT *)&t_above;
tl = (ENTROPY_CONTEXT *)&t_left;
has_2nd_order = (x->e_mbd.mode_info_context->mbmi.mode != B_PRED
&&x->e_mbd.mode_info_context->mbmi.mode != I8X8_PRED
&& x->e_mbd.mode_info_context->mbmi.mode != SPLITMV);
type = has_2nd_order ? PLANE_TYPE_Y_NO_DC : PLANE_TYPE_Y_WITH_DC;
for (b = 0; b < 16; b++)
{
optimize_b(x, b, type,
ta + vp8_block2above[b], tl + vp8_block2left[b], rtcd);
}
for (b = 16; b < 24; b++)
{
optimize_b(x, b, PLANE_TYPE_UV,
ta + vp8_block2above[b], tl + vp8_block2left[b], rtcd);
}
if (has_2nd_order)
{
b=24;
optimize_b(x, b, PLANE_TYPE_Y2,
ta + vp8_block2above[b], tl + vp8_block2left[b], rtcd);
check_reset_2nd_coeffs(&x->e_mbd, PLANE_TYPE_Y2,
ta + vp8_block2above[b], tl + vp8_block2left[b]);
}
}
void vp8_optimize_mby(MACROBLOCK *x, const VP8_ENCODER_RTCD *rtcd)
{
int b;
int type;
int has_2nd_order;
ENTROPY_CONTEXT_PLANES t_above, t_left;
ENTROPY_CONTEXT *ta;
ENTROPY_CONTEXT *tl;
if (!x->e_mbd.above_context)
return;
if (!x->e_mbd.left_context)
return;
vpx_memcpy(&t_above, x->e_mbd.above_context, sizeof(ENTROPY_CONTEXT_PLANES));
vpx_memcpy(&t_left, x->e_mbd.left_context, sizeof(ENTROPY_CONTEXT_PLANES));
ta = (ENTROPY_CONTEXT *)&t_above;
tl = (ENTROPY_CONTEXT *)&t_left;
has_2nd_order = (x->e_mbd.mode_info_context->mbmi.mode != B_PRED
&&x->e_mbd.mode_info_context->mbmi.mode != I8X8_PRED
&& x->e_mbd.mode_info_context->mbmi.mode != SPLITMV);
type = has_2nd_order ? PLANE_TYPE_Y_NO_DC : PLANE_TYPE_Y_WITH_DC;
for (b = 0; b < 16; b++)
{
optimize_b(x, b, type,
ta + vp8_block2above[b], tl + vp8_block2left[b], rtcd);
}
if (has_2nd_order)
{
b=24;
optimize_b(x, b, PLANE_TYPE_Y2,
ta + vp8_block2above[b], tl + vp8_block2left[b], rtcd);
check_reset_2nd_coeffs(&x->e_mbd, PLANE_TYPE_Y2,
ta + vp8_block2above[b], tl + vp8_block2left[b]);
}
}
void vp8_optimize_mbuv(MACROBLOCK *x, const VP8_ENCODER_RTCD *rtcd)
{
int b;
ENTROPY_CONTEXT_PLANES t_above, t_left;
ENTROPY_CONTEXT *ta;
ENTROPY_CONTEXT *tl;
if (!x->e_mbd.above_context)
return;
if (!x->e_mbd.left_context)
return;
vpx_memcpy(&t_above, x->e_mbd.above_context, sizeof(ENTROPY_CONTEXT_PLANES));
vpx_memcpy(&t_left, x->e_mbd.left_context, sizeof(ENTROPY_CONTEXT_PLANES));
ta = (ENTROPY_CONTEXT *)&t_above;
tl = (ENTROPY_CONTEXT *)&t_left;
for (b = 16; b < 24; b++)
{
optimize_b(x, b, PLANE_TYPE_UV,
ta + vp8_block2above[b], tl + vp8_block2left[b], rtcd);
}
}
void optimize_b_8x8(MACROBLOCK *mb, int i, int type,
ENTROPY_CONTEXT *a, ENTROPY_CONTEXT *l,
const VP8_ENCODER_RTCD *rtcd)
{
BLOCK *b;
BLOCKD *d;
vp8_token_state tokens[65][2];
unsigned best_mask[2];
const short *dequant_ptr;
const short *coeff_ptr;
short *qcoeff_ptr;
short *dqcoeff_ptr;
int eob;
int i0;
int rc;
int x;
int sz = 0;
int next;
int rdmult;
int rddiv;
int final_eob;
int rd_cost0;
int rd_cost1;
int rate0;
int rate1;
int error0;
int error1;
int t0;
int t1;
int best;
int band;
int pt;
int err_mult = plane_rd_mult[type];
b = &mb->block[i];
d = &mb->e_mbd.block[i];
dequant_ptr = d->dequant;
coeff_ptr = b->coeff;
qcoeff_ptr = d->qcoeff;
dqcoeff_ptr = d->dqcoeff;
i0 = !type;
eob = d->eob;
/* Now set up a Viterbi trellis to evaluate alternative roundings. */
rdmult = mb->rdmult * err_mult;
if(mb->e_mbd.mode_info_context->mbmi.ref_frame==INTRA_FRAME)
rdmult = (rdmult * 9)>>4;
rddiv = mb->rddiv;
best_mask[0] = best_mask[1] = 0;
/* Initialize the sentinel node of the trellis. */
tokens[eob][0].rate = 0;
tokens[eob][0].error = 0;
tokens[eob][0].next = 64;
tokens[eob][0].token = DCT_EOB_TOKEN;
tokens[eob][0].qc = 0;
*(tokens[eob] + 1) = *(tokens[eob] + 0);
next = eob;
for (i = eob; i-- > i0;)
{
int base_bits;
int d2;
int dx;
rc = vp8_default_zig_zag1d_8x8[i];
x = qcoeff_ptr[rc];
/* Only add a trellis state for non-zero coefficients. */
if (x)
{
int shortcut=0;
error0 = tokens[next][0].error;
error1 = tokens[next][1].error;
/* Evaluate the first possibility for this state. */
rate0 = tokens[next][0].rate;
rate1 = tokens[next][1].rate;
t0 = (vp8_dct_value_tokens_ptr + x)->Token;
/* Consider both possible successor states. */
if (next < 64)
{
band = vp8_coef_bands_8x8[i + 1];
pt = vp8_prev_token_class[t0];
rate0 +=
mb->token_costs_8x8[type][band][pt][tokens[next][0].token];
rate1 +=
mb->token_costs_8x8[type][band][pt][tokens[next][1].token];
}
rd_cost0 = RDCOST_8x8(rdmult, rddiv, rate0, error0);
rd_cost1 = RDCOST_8x8(rdmult, rddiv, rate1, error1);
if (rd_cost0 == rd_cost1)
{
rd_cost0 = RDTRUNC_8x8(rdmult, rddiv, rate0, error0);
rd_cost1 = RDTRUNC_8x8(rdmult, rddiv, rate1, error1);
}
/* And pick the best. */
best = rd_cost1 < rd_cost0;
base_bits = *(vp8_dct_value_cost_ptr + x);
dx = dqcoeff_ptr[rc] - coeff_ptr[rc];
d2 = dx*dx;
tokens[i][0].rate = base_bits + (best ? rate1 : rate0);
tokens[i][0].error = d2 + (best ? error1 : error0);
tokens[i][0].next = next;
tokens[i][0].token = t0;
tokens[i][0].qc = x;
best_mask[0] |= best << i;
/* Evaluate the second possibility for this state. */
rate0 = tokens[next][0].rate;
rate1 = tokens[next][1].rate;
if((abs(x)*dequant_ptr[rc!=0]>abs(coeff_ptr[rc])) &&
(abs(x)*dequant_ptr[rc!=0]<abs(coeff_ptr[rc])+dequant_ptr[rc!=0]))
shortcut = 1;
else
shortcut = 0;
if(shortcut)
{
sz = -(x < 0);
x -= 2*sz + 1;
}
/* Consider both possible successor states. */
if (!x)
{
/* If we reduced this coefficient to zero, check to see if
* we need to move the EOB back here.
*/
t0 = tokens[next][0].token == DCT_EOB_TOKEN ?
DCT_EOB_TOKEN : ZERO_TOKEN;
t1 = tokens[next][1].token == DCT_EOB_TOKEN ?
DCT_EOB_TOKEN : ZERO_TOKEN;
}
else
{
t0=t1 = (vp8_dct_value_tokens_ptr + x)->Token;
}
if (next < 64)
{
band = vp8_coef_bands_8x8[i + 1];
if(t0!=DCT_EOB_TOKEN)
{
pt = vp8_prev_token_class[t0];
rate0 += mb->token_costs_8x8[type][band][pt][
tokens[next][0].token];
}
if(t1!=DCT_EOB_TOKEN)
{
pt = vp8_prev_token_class[t1];
rate1 += mb->token_costs_8x8[type][band][pt][
tokens[next][1].token];
}
}
rd_cost0 = RDCOST_8x8(rdmult, rddiv, rate0, error0);
rd_cost1 = RDCOST_8x8(rdmult, rddiv, rate1, error1);
if (rd_cost0 == rd_cost1)
{
rd_cost0 = RDTRUNC_8x8(rdmult, rddiv, rate0, error0);
rd_cost1 = RDTRUNC_8x8(rdmult, rddiv, rate1, error1);
}
/* And pick the best. */
best = rd_cost1 < rd_cost0;
base_bits = *(vp8_dct_value_cost_ptr + x);
if(shortcut)
{
dx -= (dequant_ptr[rc!=0] + sz) ^ sz;
d2 = dx*dx;
}
tokens[i][1].rate = base_bits + (best ? rate1 : rate0);
tokens[i][1].error = d2 + (best ? error1 : error0);
tokens[i][1].next = next;
tokens[i][1].token =best?t1:t0;
tokens[i][1].qc = x;
best_mask[1] |= best << i;
/* Finally, make this the new head of the trellis. */
next = i;
}
/* There's no choice to make for a zero coefficient, so we don't
* add a new trellis node, but we do need to update the costs.
*/
else
{
band = vp8_coef_bands_8x8[i + 1];
t0 = tokens[next][0].token;
t1 = tokens[next][1].token;
/* Update the cost of each path if we're past the EOB token. */
if (t0 != DCT_EOB_TOKEN)
{
tokens[next][0].rate += mb->token_costs_8x8[type][band][0][t0];
tokens[next][0].token = ZERO_TOKEN;
}
if (t1 != DCT_EOB_TOKEN)
{
tokens[next][1].rate += mb->token_costs_8x8[type][band][0][t1];
tokens[next][1].token = ZERO_TOKEN;
}
/* Don't update next, because we didn't add a new node. */
}
}
/* Now pick the best path through the whole trellis. */
band = vp8_coef_bands_8x8[i + 1];
VP8_COMBINEENTROPYCONTEXTS(pt, *a, *l);
rate0 = tokens[next][0].rate;
rate1 = tokens[next][1].rate;
error0 = tokens[next][0].error;
error1 = tokens[next][1].error;
t0 = tokens[next][0].token;
t1 = tokens[next][1].token;
rate0 += mb->token_costs_8x8[type][band][pt][t0];
rate1 += mb->token_costs_8x8[type][band][pt][t1];
rd_cost0 = RDCOST_8x8(rdmult, rddiv, rate0, error0);
rd_cost1 = RDCOST_8x8(rdmult, rddiv, rate1, error1);
if (rd_cost0 == rd_cost1)
{
rd_cost0 = RDTRUNC_8x8(rdmult, rddiv, rate0, error0);
rd_cost1 = RDTRUNC_8x8(rdmult, rddiv, rate1, error1);
}
best = rd_cost1 < rd_cost0;
final_eob = i0 - 1;
for (i = next; i < eob; i = next)
{
x = tokens[i][best].qc;
if (x)
final_eob = i;
rc = vp8_default_zig_zag1d_8x8[i];
qcoeff_ptr[rc] = x;
dqcoeff_ptr[rc] = (x * dequant_ptr[rc!=0]);
next = tokens[i][best].next;
best = (best_mask[best] >> i) & 1;
}
final_eob++;
d->eob = final_eob;
*a = *l = (d->eob != !type);
}
void optimize_mb_8x8(MACROBLOCK *x, const VP8_ENCODER_RTCD *rtcd)
{
int b;
int type;
ENTROPY_CONTEXT_PLANES t_above, t_left;
ENTROPY_CONTEXT *ta;
ENTROPY_CONTEXT *tl;
vpx_memcpy(&t_above, x->e_mbd.above_context, sizeof(ENTROPY_CONTEXT_PLANES));
vpx_memcpy(&t_left, x->e_mbd.left_context, sizeof(ENTROPY_CONTEXT_PLANES));
ta = (ENTROPY_CONTEXT *)&t_above;
tl = (ENTROPY_CONTEXT *)&t_left;
type = 0;
for (b = 0; b < 16; b+=4)
{
optimize_b_8x8(x, b, type,
ta + vp8_block2above_8x8[b], tl + vp8_block2left_8x8[b],
rtcd);
*(ta + vp8_block2above_8x8[b] + 1) = *(ta + vp8_block2above_8x8[b]);
*(tl + vp8_block2left_8x8[b] + 1) = *(tl + vp8_block2left_8x8[b] );
}
for (b = 16; b < 24; b+=4)
{
optimize_b_8x8(x, b, PLANE_TYPE_UV,
ta + vp8_block2above_8x8[b], tl + vp8_block2left_8x8[b],
rtcd);
*(ta + vp8_block2above_8x8[b]+1) = *(ta + vp8_block2above_8x8[b]);
*(tl + vp8_block2left_8x8[b]+1 ) = *(tl + vp8_block2left_8x8[b]);
}
//8x8 always have 2nd roder haar block
check_reset_8x8_2nd_coeffs(&x->e_mbd, PLANE_TYPE_Y2,
ta + vp8_block2above_8x8[24], tl + vp8_block2left_8x8[24]);
}
void vp8_optimize_mby_8x8(MACROBLOCK *x, const VP8_ENCODER_RTCD *rtcd)
{
int b;
int type;
int has_2nd_order;
ENTROPY_CONTEXT_PLANES t_above, t_left;
ENTROPY_CONTEXT *ta;
ENTROPY_CONTEXT *tl;
if (!x->e_mbd.above_context)
return;
if (!x->e_mbd.left_context)
return;
vpx_memcpy(&t_above, x->e_mbd.above_context, sizeof(ENTROPY_CONTEXT_PLANES));
vpx_memcpy(&t_left, x->e_mbd.left_context, sizeof(ENTROPY_CONTEXT_PLANES));
ta = (ENTROPY_CONTEXT *)&t_above;
tl = (ENTROPY_CONTEXT *)&t_left;
type = 0;
for (b = 0; b < 16; b+=4)
{
optimize_b_8x8(x, b, type,
ta + vp8_block2above[b], tl + vp8_block2left[b],
rtcd);
*(ta + vp8_block2above_8x8[b] + 1) = *(ta + vp8_block2above_8x8[b]);
*(tl + vp8_block2left_8x8[b] + 1) = *(tl + vp8_block2left_8x8[b] );
}
//8x8 always have 2nd roder haar block
check_reset_8x8_2nd_coeffs(&x->e_mbd, PLANE_TYPE_Y2,
ta + vp8_block2above_8x8[24], tl + vp8_block2left_8x8[24]);
}
void vp8_optimize_mbuv_8x8(MACROBLOCK *x, const VP8_ENCODER_RTCD *rtcd)
{
int b;
ENTROPY_CONTEXT_PLANES t_above, t_left;
ENTROPY_CONTEXT *ta;
ENTROPY_CONTEXT *tl;
if (!x->e_mbd.above_context)
return;
if (!x->e_mbd.left_context)
return;
vpx_memcpy(&t_above, x->e_mbd.above_context, sizeof(ENTROPY_CONTEXT_PLANES));
vpx_memcpy(&t_left, x->e_mbd.left_context, sizeof(ENTROPY_CONTEXT_PLANES));
ta = (ENTROPY_CONTEXT *)&t_above;
tl = (ENTROPY_CONTEXT *)&t_left;
for (b = 16; b < 24; b+=4)
{
optimize_b_8x8(x, b, PLANE_TYPE_UV,
ta + vp8_block2above_8x8[b], tl + vp8_block2left_8x8[b],
rtcd);
*(ta + vp8_block2above_8x8[b]+1) = *(ta + vp8_block2above_8x8[b]);
*(tl + vp8_block2left_8x8[b]+1 ) = *(tl + vp8_block2left_8x8[b]);
}
}
void vp8_encode_inter16x16(const VP8_ENCODER_RTCD *rtcd, MACROBLOCK *x)
{
int tx_type = x->e_mbd.mode_info_context->mbmi.txfm_size;
vp8_build_inter_predictors_mb(&x->e_mbd);
vp8_subtract_mb(rtcd, x);
if( tx_type == TX_8X8 )
vp8_transform_mb_8x8(x);
else
transform_mb(x);
if( tx_type == TX_8X8 )
vp8_quantize_mb_8x8(x);
else
vp8_quantize_mb(x);
if (x->optimize)
{
if( tx_type == TX_8X8 )
optimize_mb_8x8(x, rtcd);
else
optimize_mb(x, rtcd);
}
if( tx_type == TX_8X8 )
vp8_inverse_transform_mb_8x8(IF_RTCD(&rtcd->common->idct), &x->e_mbd);
else
vp8_inverse_transform_mb(IF_RTCD(&rtcd->common->idct), &x->e_mbd);
if( tx_type == TX_8X8 )
{
#ifdef ENC_DEBUG
if (enc_debug)
{
int i;
printf("qcoeff:\n");
printf("%d %d:\n", x->e_mbd.mb_to_left_edge, x->e_mbd.mb_to_top_edge);
for (i =0; i<400; i++) {
printf("%3d ", x->e_mbd.qcoeff[i]);
if (i%16 == 15) printf("\n");
}
printf("dqcoeff:\n");
for (i =0; i<400; i++) {
printf("%3d ", x->e_mbd.dqcoeff[i]);
if (i%16 == 15) printf("\n");
}
printf("diff:\n");
for (i =0; i<400; i++) {
printf("%3d ", x->e_mbd.diff[i]);
if (i%16 == 15) printf("\n");
}
printf("predictor:\n");
for (i =0; i<400; i++) {
printf("%3d ", x->e_mbd.predictor[i]);
if (i%16 == 15) printf("\n");
}
printf("\n");
}
#endif
}
RECON_INVOKE(&rtcd->common->recon, recon_mb)
(IF_RTCD(&rtcd->common->recon), &x->e_mbd);
#ifdef ENC_DEBUG
if (enc_debug) {
int i, j, k;
printf("Final Reconstruction\n");
for (i =0; i<16; i+=4) {
BLOCKD *b = &x->e_mbd.block[i];
unsigned char *d = *(b->base_dst) + b->dst;
for (k=0; k<4; k++) {
for (j=0; j<16; j++)
printf("%3d ", d[j]);
printf("\n");
d+=b->dst_stride;
}
}
}
#endif
}
/* this function is used by first pass only */
void vp8_encode_inter16x16y(const VP8_ENCODER_RTCD *rtcd, MACROBLOCK *x)
{
int tx_type = x->e_mbd.mode_info_context->mbmi.txfm_size;
BLOCK *b = &x->block[0];
vp8_build_inter16x16_predictors_mby(&x->e_mbd);
ENCODEMB_INVOKE(&rtcd->encodemb, submby)(x->src_diff, *(b->base_src), x->e_mbd.predictor, b->src_stride);
if( tx_type == TX_8X8 )
vp8_transform_mby_8x8(x);
else
transform_mby(x);
vp8_quantize_mby(x);
if( tx_type == TX_8X8 )
vp8_inverse_transform_mby_8x8(IF_RTCD(&rtcd->common->idct), &x->e_mbd);
else
vp8_inverse_transform_mby(IF_RTCD(&rtcd->common->idct), &x->e_mbd);
RECON_INVOKE(&rtcd->common->recon, recon_mby)
(IF_RTCD(&rtcd->common->recon), &x->e_mbd);
}
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