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move rescaler functions to rescaler* files in src/dsp/

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Change-Id: I906add1b1010a59ebfcc2dd81e15745433cc206b
This commit is contained in:
Djordje Pesut 2015-01-09 12:05:53 +01:00
parent ac79ed19ef
commit cbcbedd0de
8 changed files with 572 additions and 470 deletions
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3
Android.mk
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@ -57,6 +57,9 @@ LOCAL_SRC_FILES := \
src/dsp/lossless_mips_dsp_r2.c \
src/dsp/lossless_neon.$(NEON) \
src/dsp/lossless_sse2.c \
src/dsp/rescaler.c \
src/dsp/rescaler_mips32.c \
src/dsp/rescaler_mips_dsp_r2.c \
src/dsp/upsampling.c \
src/dsp/upsampling_mips_dsp_r2.c \
src/dsp/upsampling_neon.$(NEON) \

3
Makefile.vc
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@ -193,6 +193,9 @@ DSP_DEC_OBJS = \
$(DIROBJ)\dsp\lossless_mips_dsp_r2.obj \
$(DIROBJ)\dsp\lossless_neon.obj \
$(DIROBJ)\dsp\lossless_sse2.obj \
$(DIROBJ)\dsp\rescaler.obj \
$(DIROBJ)\dsp\rescaler_mips32.obj \
$(DIROBJ)\dsp\rescaler_mips_dsp_r2.obj \
$(DIROBJ)\dsp\upsampling.obj \
$(DIROBJ)\dsp\upsampling_mips_dsp_r2.obj \
$(DIROBJ)\dsp\upsampling_neon.obj \

3
makefile.unix
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@ -125,6 +125,9 @@ DSP_DEC_OBJS = \
src/dsp/lossless_mips_dsp_r2.o \
src/dsp/lossless_neon.o \
src/dsp/lossless_sse2.o \
src/dsp/rescaler.o \
src/dsp/rescaler_mips32.o \
src/dsp/rescaler_mips_dsp_r2.o \
src/dsp/upsampling.o \
src/dsp/upsampling_mips_dsp_r2.o \
src/dsp/upsampling_neon.o \

3
src/dsp/Makefile.am
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@ -26,6 +26,9 @@ COMMON_SOURCES += lossless_mips_dsp_r2.c
COMMON_SOURCES += lossless_neon.c
COMMON_SOURCES += mips_macro.h
COMMON_SOURCES += neon.h
COMMON_SOURCES += rescaler.c
COMMON_SOURCES += rescaler_mips32.c
COMMON_SOURCES += rescaler_mips_dsp_r2.c
COMMON_SOURCES += upsampling.c
COMMON_SOURCES += upsampling_mips_dsp_r2.c
COMMON_SOURCES += upsampling_neon.c

136
src/dsp/rescaler.c Normal file
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@ -0,0 +1,136 @@
// Copyright 2014 Google Inc. All Rights Reserved.
//
// Use of this source code is governed by a BSD-style license
// that can be found in the COPYING 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.
// -----------------------------------------------------------------------------
//
// Rescaling functions
#include "./dsp.h"
#include "../utils/rescaler.h"
//------------------------------------------------------------------------------
// Implementations of critical functions ImportRow / ExportRow
void (*WebPRescalerImportRow)(WebPRescaler* const wrk,
const uint8_t* const src, int channel) = NULL;
void (*WebPRescalerExportRow)(WebPRescaler* const wrk, int x_out) = NULL;
#define RFIX 30
#define MULT_FIX(x, y) (((int64_t)(x) * (y) + (1 << (RFIX - 1))) >> RFIX)
static void ImportRowC(WebPRescaler* const wrk,
const uint8_t* const src, int channel) {
const int x_stride = wrk->num_channels;
const int x_out_max = wrk->dst_width * wrk->num_channels;
int x_in = channel;
int x_out;
int accum = 0;
if (!wrk->x_expand) {
int sum = 0;
for (x_out = channel; x_out < x_out_max; x_out += x_stride) {
accum += wrk->x_add;
for (; accum > 0; accum -= wrk->x_sub) {
sum += src[x_in];
x_in += x_stride;
}
{ // Emit next horizontal pixel.
const int32_t base = src[x_in];
const int32_t frac = base * (-accum);
x_in += x_stride;
wrk->frow[x_out] = (sum + base) * wrk->x_sub - frac;
// fresh fractional start for next pixel
sum = (int)MULT_FIX(frac, wrk->fx_scale);
}
}
} else { // simple bilinear interpolation
int left = src[channel], right = src[channel];
for (x_out = channel; x_out < x_out_max; x_out += x_stride) {
if (accum < 0) {
left = right;
x_in += x_stride;
right = src[x_in];
accum += wrk->x_add;
}
wrk->frow[x_out] = right * wrk->x_add + (left - right) * accum;
accum -= wrk->x_sub;
}
}
// Accumulate the contribution of the new row.
for (x_out = channel; x_out < x_out_max; x_out += x_stride) {
wrk->irow[x_out] += wrk->frow[x_out];
}
}
static void ExportRowC(WebPRescaler* const wrk, int x_out) {
if (wrk->y_accum <= 0) {
uint8_t* const dst = wrk->dst;
int32_t* const irow = wrk->irow;
const int32_t* const frow = wrk->frow;
const int yscale = wrk->fy_scale * (-wrk->y_accum);
const int x_out_max = wrk->dst_width * wrk->num_channels;
for (; x_out < x_out_max; ++x_out) {
const int frac = (int)MULT_FIX(frow[x_out], yscale);
const int v = (int)MULT_FIX(irow[x_out] - frac, wrk->fxy_scale);
dst[x_out] = (!(v & ~0xff)) ? v : (v < 0) ? 0 : 255;
irow[x_out] = frac; // new fractional start
}
wrk->y_accum += wrk->y_add;
wrk->dst += wrk->dst_stride;
}
}
//------------------------------------------------------------------------------
extern void WebPRescalerDspInitMIPS32(void);
extern void WebPRescalerDspInitMIPSdspR2(void);
void WebPRescalerInit(WebPRescaler* const wrk, int src_width, int src_height,
uint8_t* const dst, int dst_width, int dst_height,
int dst_stride, int num_channels, int x_add, int x_sub,
int y_add, int y_sub, int32_t* const work) {
wrk->x_expand = (src_width < dst_width);
wrk->src_width = src_width;
wrk->src_height = src_height;
wrk->dst_width = dst_width;
wrk->dst_height = dst_height;
wrk->dst = dst;
wrk->dst_stride = dst_stride;
wrk->num_channels = num_channels;
// for 'x_expand', we use bilinear interpolation
wrk->x_add = wrk->x_expand ? (x_sub - 1) : x_add - x_sub;
wrk->x_sub = wrk->x_expand ? (x_add - 1) : x_sub;
wrk->y_accum = y_add;
wrk->y_add = y_add;
wrk->y_sub = y_sub;
wrk->fx_scale = (1 << RFIX) / x_sub;
wrk->fy_scale = (1 << RFIX) / y_sub;
wrk->fxy_scale = wrk->x_expand ?
((int64_t)dst_height << RFIX) / (x_sub * src_height) :
((int64_t)dst_height << RFIX) / (x_add * src_height);
wrk->irow = work;
wrk->frow = work + num_channels * dst_width;
if (WebPRescalerImportRow == NULL) {
WebPRescalerImportRow = ImportRowC;
WebPRescalerExportRow = ExportRowC;
if (VP8GetCPUInfo != NULL) {
#if defined(WEBP_USE_MIPS32)
if (VP8GetCPUInfo(kMIPS32)) {
WebPRescalerDspInitMIPS32();
}
#endif
#if defined(WEBP_USE_MIPS_DSP_R2)
if (VP8GetCPUInfo(kMIPSdspR2)) {
WebPRescalerDspInitMIPSdspR2();
}
#endif
}
}
}
#undef MULT_FIX
#undef RFIX

203
src/dsp/rescaler_mips32.c Normal file
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@ -0,0 +1,203 @@
// Copyright 2014 Google Inc. All Rights Reserved.
//
// Use of this source code is governed by a BSD-style license
// that can be found in the COPYING 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.
// -----------------------------------------------------------------------------
//
// MIPS version of rescaling functions
//
// Author(s): Djordje Pesut (djordje.pesut@imgtec.com)
#include "./dsp.h"
#if defined(WEBP_USE_MIPS32)
#include "../utils/rescaler.h"
static void ImportRow(WebPRescaler* const wrk,
const uint8_t* const src, int channel) {
const int x_stride = wrk->num_channels;
const int x_out_max = wrk->dst_width * wrk->num_channels;
const int fx_scale = wrk->fx_scale;
const int x_add = wrk->x_add;
const int x_sub = wrk->x_sub;
int* frow = wrk->frow + channel;
int* irow = wrk->irow + channel;
const uint8_t* src1 = src + channel;
int temp1, temp2, temp3;
int base, frac, sum;
int accum, accum1;
const int x_stride1 = x_stride << 2;
int loop_c = x_out_max - channel;
if (!wrk->x_expand) {
__asm__ volatile (
"li %[temp1], 0x8000 \n\t"
"li %[temp2], 0x10000 \n\t"
"li %[sum], 0 \n\t"
"li %[accum], 0 \n\t"
"1: \n\t"
"addu %[accum], %[accum], %[x_add] \n\t"
"blez %[accum], 3f \n\t"
"2: \n\t"
"lbu %[temp3], 0(%[src1]) \n\t"
"subu %[accum], %[accum], %[x_sub] \n\t"
"addu %[src1], %[src1], %[x_stride] \n\t"
"addu %[sum], %[sum], %[temp3] \n\t"
"bgtz %[accum], 2b \n\t"
"3: \n\t"
"lbu %[base], 0(%[src1]) \n\t"
"addu %[src1], %[src1], %[x_stride] \n\t"
"negu %[accum1], %[accum] \n\t"
"mul %[frac], %[base], %[accum1] \n\t"
"addu %[temp3], %[sum], %[base] \n\t"
"mul %[temp3], %[temp3], %[x_sub] \n\t"
"lw %[base], 0(%[irow]) \n\t"
"subu %[loop_c], %[loop_c], %[x_stride] \n\t"
"sll %[accum1], %[frac], 2 \n\t"
"mult %[temp1], %[temp2] \n\t"
"madd %[accum1], %[fx_scale] \n\t"
"mfhi %[sum] \n\t"
"subu %[temp3], %[temp3], %[frac] \n\t"
"sw %[temp3], 0(%[frow]) \n\t"
"add %[base], %[base], %[temp3] \n\t"
"sw %[base], 0(%[irow]) \n\t"
"addu %[irow], %[irow], %[x_stride1] \n\t"
"addu %[frow], %[frow], %[x_stride1] \n\t"
"bgtz %[loop_c], 1b \n\t"
: [accum] "=&r" (accum), [src1] "+r" (src1), [temp3] "=&r" (temp3),
[sum] "=&r" (sum), [base] "=&r" (base), [frac] "=&r" (frac),
[frow] "+r" (frow), [irow] "+r" (irow), [accum1] "=&r" (accum1),
[temp2] "=&r" (temp2), [temp1] "=&r" (temp1)
: [x_stride] "r" (x_stride), [fx_scale] "r" (fx_scale),
[x_sub] "r" (x_sub), [x_add] "r" (x_add),
[loop_c] "r" (loop_c), [x_stride1] "r" (x_stride1)
: "memory", "hi", "lo"
);
} else {
__asm__ volatile (
"lbu %[temp1], 0(%[src1]) \n\t"
"move %[temp2], %[temp1] \n\t"
"li %[accum], 0 \n\t"
"1: \n\t"
"bgez %[accum], 2f \n\t"
"move %[temp2], %[temp1] \n\t"
"addu %[src1], %[x_stride] \n\t"
"lbu %[temp1], 0(%[src1]) \n\t"
"addu %[accum], %[x_add] \n\t"
"2: \n\t"
"subu %[temp3], %[temp2], %[temp1] \n\t"
"mul %[temp3], %[temp3], %[accum] \n\t"
"mul %[base], %[temp1], %[x_add] \n\t"
"subu %[accum], %[accum], %[x_sub] \n\t"
"lw %[frac], 0(%[irow]) \n\t"
"subu %[loop_c], %[loop_c], %[x_stride] \n\t"
"addu %[temp3], %[base], %[temp3] \n\t"
"sw %[temp3], 0(%[frow]) \n\t"
"addu %[frow], %[x_stride1] \n\t"
"addu %[frac], %[temp3] \n\t"
"sw %[frac], 0(%[irow]) \n\t"
"addu %[irow], %[x_stride1] \n\t"
"bgtz %[loop_c], 1b \n\t"
: [src1] "+r" (src1), [accum] "=&r" (accum), [temp1] "=&r" (temp1),
[temp2] "=&r" (temp2), [temp3] "=&r" (temp3), [base] "=&r" (base),
[frac] "=&r" (frac), [frow] "+r" (frow), [irow] "+r" (irow)
: [x_stride] "r" (x_stride), [x_add] "r" (x_add), [x_sub] "r" (x_sub),
[x_stride1] "r" (x_stride1), [loop_c] "r" (loop_c)
: "memory", "hi", "lo"
);
}
}
#define RFIX 30
#define MULT_FIX(x, y) (((int64_t)(x) * (y) + (1 << (RFIX - 1))) >> RFIX)
static void ExportRow(WebPRescaler* const wrk, int x_out) {
if (wrk->y_accum <= 0) {
uint8_t* const dst = wrk->dst;
int32_t* const irow = wrk->irow;
const int32_t* const frow = wrk->frow;
const int yscale = wrk->fy_scale * (-wrk->y_accum);
const int x_out_max = wrk->dst_width * wrk->num_channels;
// if wrk->fxy_scale can fit into 32 bits use optimized code,
// otherwise use C code
if ((wrk->fxy_scale >> 32) == 0) {
int temp0, temp1, temp3, temp4, temp5, temp6, temp7, loop_end;
const int temp2 = (int)(wrk->fxy_scale);
const int temp8 = x_out_max << 2;
uint8_t* dst_t = (uint8_t*)dst;
int32_t* irow_t = (int32_t*)irow;
const int32_t* frow_t = (const int32_t*)frow;
__asm__ volatile(
"addiu %[temp6], $zero, -256 \n\t"
"addiu %[temp7], $zero, 255 \n\t"
"li %[temp3], 0x10000 \n\t"
"li %[temp4], 0x8000 \n\t"
"addu %[loop_end], %[frow_t], %[temp8] \n\t"
"1: \n\t"
"lw %[temp0], 0(%[frow_t]) \n\t"
"mult %[temp3], %[temp4] \n\t"
"addiu %[frow_t], %[frow_t], 4 \n\t"
"sll %[temp0], %[temp0], 2 \n\t"
"madd %[temp0], %[yscale] \n\t"
"mfhi %[temp1] \n\t"
"lw %[temp0], 0(%[irow_t]) \n\t"
"addiu %[dst_t], %[dst_t], 1 \n\t"
"addiu %[irow_t], %[irow_t], 4 \n\t"
"subu %[temp0], %[temp0], %[temp1] \n\t"
"mult %[temp3], %[temp4] \n\t"
"sll %[temp0], %[temp0], 2 \n\t"
"madd %[temp0], %[temp2] \n\t"
"mfhi %[temp5] \n\t"
"sw %[temp1], -4(%[irow_t]) \n\t"
"and %[temp0], %[temp5], %[temp6] \n\t"
"slti %[temp1], %[temp5], 0 \n\t"
"beqz %[temp0], 2f \n\t"
"xor %[temp5], %[temp5], %[temp5] \n\t"
"movz %[temp5], %[temp7], %[temp1] \n\t"
"2: \n\t"
"sb %[temp5], -1(%[dst_t]) \n\t"
"bne %[frow_t], %[loop_end], 1b \n\t"
: [temp0]"=&r"(temp0), [temp1]"=&r"(temp1), [temp3]"=&r"(temp3),
[temp4]"=&r"(temp4), [temp5]"=&r"(temp5), [temp6]"=&r"(temp6),
[temp7]"=&r"(temp7), [frow_t]"+r"(frow_t), [irow_t]"+r"(irow_t),
[dst_t]"+r"(dst_t), [loop_end]"=&r"(loop_end)
: [temp2]"r"(temp2), [yscale]"r"(yscale), [temp8]"r"(temp8)
: "memory", "hi", "lo"
);
} else {
for (; x_out < x_out_max; ++x_out) {
const int frac = (int)MULT_FIX(frow[x_out], yscale);
const int v = (int)MULT_FIX(irow[x_out] - frac, wrk->fxy_scale);
dst[x_out] = (!(v & ~0xff)) ? v : (v < 0) ? 0 : 255;
irow[x_out] = frac; // new fractional start
}
}
wrk->y_accum += wrk->y_add;
wrk->dst += wrk->dst_stride;
}
}
#undef MULT_FIX
#undef RFIX
#endif // WEBP_USE_MIPS32
//------------------------------------------------------------------------------
// Entry point
extern WEBP_TSAN_IGNORE_FUNCTION void WebPRescalerDspInitMIPS32(void);
WEBP_TSAN_IGNORE_FUNCTION void WebPRescalerDspInitMIPS32(void) {
#if defined(WEBP_USE_MIPS32)
WebPRescalerImportRow = ImportRow;
WebPRescalerExportRow = ExportRow;
#endif // WEBP_USE_MIPS32
}

221
src/dsp/rescaler_mips_dsp_r2.c Normal file
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@ -0,0 +1,221 @@
// Copyright 2014 Google Inc. All Rights Reserved.
//
// Use of this source code is governed by a BSD-style license
// that can be found in the COPYING 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.
// -----------------------------------------------------------------------------
//
// MIPS version of rescaling functions
//
// Author(s): Djordje Pesut (djordje.pesut@imgtec.com)
#include "./dsp.h"
#if defined(WEBP_USE_MIPS_DSP_R2)
#include "../utils/rescaler.h"
static void ImportRow(WebPRescaler* const wrk,
const uint8_t* const src, int channel) {
const int x_stride = wrk->num_channels;
const int x_out_max = wrk->dst_width * wrk->num_channels;
const int fx_scale = wrk->fx_scale;
const int x_add = wrk->x_add;
const int x_sub = wrk->x_sub;
int* frow = wrk->frow + channel;
int* irow = wrk->irow + channel;
const uint8_t* src1 = src + channel;
int temp1, temp2, temp3;
int base, frac, sum;
int accum, accum1;
const int x_stride1 = x_stride << 2;
int loop_c = x_out_max - channel;
if (!wrk->x_expand) {
__asm__ volatile (
"li %[sum], 0 \n\t"
"li %[accum], 0 \n\t"
"1: \n\t"
"addu %[accum], %[accum], %[x_add] \n\t"
"blez %[accum], 3f \n\t"
"2: \n\t"
"lbu %[temp3], 0(%[src1]) \n\t"
"subu %[accum], %[accum], %[x_sub] \n\t"
"addu %[src1], %[src1], %[x_stride] \n\t"
"addu %[sum], %[sum], %[temp3] \n\t"
"bgtz %[accum], 2b \n\t"
"3: \n\t"
"lbu %[base], 0(%[src1]) \n\t"
"addu %[src1], %[src1], %[x_stride] \n\t"
"negu %[accum1], %[accum] \n\t"
"mul %[frac], %[base], %[accum1] \n\t"
"addu %[temp3], %[sum], %[base] \n\t"
"mul %[temp3], %[temp3], %[x_sub] \n\t"
"lw %[base], 0(%[irow]) \n\t"
"sll %[accum1], %[frac], 1 \n\t"
"subu %[loop_c], %[loop_c], %[x_stride] \n\t"
"mulq_rs.w %[sum], %[accum1], %[fx_scale] \n\t"
"subu %[temp3], %[temp3], %[frac] \n\t"
"sw %[temp3], 0(%[frow]) \n\t"
"add %[base], %[base], %[temp3] \n\t"
"sw %[base], 0(%[irow]) \n\t"
"addu %[irow], %[irow], %[x_stride1] \n\t"
"addu %[frow], %[frow], %[x_stride1] \n\t"
"bgtz %[loop_c], 1b \n\t"
: [accum]"=&r"(accum), [src1]"+&r"(src1), [temp3]"=&r"(temp3),
[sum]"=&r"(sum), [base]"=&r"(base), [frac]"=&r"(frac),
[frow]"+&r"(frow), [irow]"+&r"(irow), [accum1]"=&r"(accum1),
[loop_c]"+&r"(loop_c)
: [x_stride]"r"(x_stride), [fx_scale]"r"(fx_scale), [x_sub]"r"(x_sub),
[x_add] "r" (x_add), [x_stride1] "r" (x_stride1)
: "memory", "hi", "lo"
);
} else {
__asm__ volatile (
"lbu %[temp1], 0(%[src1]) \n\t"
"move %[temp2], %[temp1] \n\t"
"li %[accum], 0 \n\t"
"1: \n\t"
"bgez %[accum], 2f \n\t"
"move %[temp2], %[temp1] \n\t"
"addu %[src1], %[x_stride] \n\t"
"lbu %[temp1], 0(%[src1]) \n\t"
"addu %[accum], %[x_add] \n\t"
"2: \n\t"
"subu %[temp3], %[temp2], %[temp1] \n\t"
"mul %[temp3], %[temp3], %[accum] \n\t"
"mul %[base], %[temp1], %[x_add] \n\t"
"subu %[accum], %[accum], %[x_sub] \n\t"
"lw %[frac], 0(%[irow]) \n\t"
"subu %[loop_c], %[loop_c], %[x_stride] \n\t"
"addu %[temp3], %[base], %[temp3] \n\t"
"sw %[temp3], 0(%[frow]) \n\t"
"addu %[frow], %[x_stride1] \n\t"
"addu %[frac], %[temp3] \n\t"
"sw %[frac], 0(%[irow]) \n\t"
"addu %[irow], %[x_stride1] \n\t"
"bgtz %[loop_c], 1b \n\t"
: [src1]"+&r"(src1), [accum]"=&r"(accum), [temp1]"=&r"(temp1),
[temp2]"=&r"(temp2), [temp3]"=&r"(temp3), [base]"=&r"(base),
[frac]"=&r"(frac), [frow]"+&r"(frow), [irow]"+&r"(irow),
[loop_c]"+&r"(loop_c)
: [x_stride]"r"(x_stride), [x_add]"r"(x_add), [x_sub]"r"(x_sub),
[x_stride1]"r"(x_stride1)
: "memory", "hi", "lo"
);
}
}
#define RFIX 30
#define MULT_FIX(x, y) (((int64_t)(x) * (y) + (1 << (RFIX - 1))) >> RFIX)
static void ExportRow(WebPRescaler* const wrk, int x_out) {
if (wrk->y_accum <= 0) {
uint8_t* dst = wrk->dst;
int32_t* irow = wrk->irow;
const int32_t* frow = wrk->frow;
const int yscale = wrk->fy_scale * (-wrk->y_accum);
const int x_out_max = wrk->dst_width * wrk->num_channels;
// if wrk->fxy_scale can fit into 32 bits use optimized code,
// otherwise use C code
if ((wrk->fxy_scale >> 32) == 0) {
int temp0, temp1, temp3, temp4, temp5, temp6, temp7;
const int temp2 = (int)wrk->fxy_scale;
const int rest = (x_out_max - x_out) & 1;
const int32_t* const loop_end = frow + (x_out_max - x_out) - rest;
__asm__ volatile (
".set push \n\t"
".set noreorder \n\t"
"beq %[frow], %[loop_end], 1f \n\t"
" nop \n\t"
"0: \n\t"
"lw %[temp0], 0(%[frow]) \n\t"
"lw %[temp1], 0(%[irow]) \n\t"
"lw %[temp3], 4(%[frow]) \n\t"
"lw %[temp4], 4(%[irow]) \n\t"
"sll %[temp0], %[temp0], 1 \n\t"
"sll %[temp3], %[temp3], 1 \n\t"
"mulq_rs.w %[temp5], %[temp0], %[yscale] \n\t"
"mulq_rs.w %[temp6], %[temp3], %[yscale] \n\t"
"addiu %[frow], %[frow], 8 \n\t"
"addiu %[dst], %[dst], 2 \n\t"
"addiu %[irow], %[irow], 8 \n\t"
"subu %[temp1], %[temp1], %[temp5] \n\t"
"subu %[temp4], %[temp4], %[temp6] \n\t"
"sll %[temp1], %[temp1], 1 \n\t"
"sll %[temp4], %[temp4], 1 \n\t"
"mulq_rs.w %[temp0], %[temp1], %[temp2] \n\t"
"mulq_rs.w %[temp3], %[temp4], %[temp2] \n\t"
"sw %[temp5], -8(%[irow]) \n\t"
"sw %[temp6], -4(%[irow]) \n\t"
"shll_s.ph %[temp0], %[temp0], 7 \n\t"
"shll_s.ph %[temp3], %[temp3], 7 \n\t"
"precrqu_s.qb.ph %[temp0], %[temp0], %[temp3] \n\t"
"sb %[temp0], -1(%[dst]) \n\t"
"srl %[temp0], %[temp0], 16 \n\t"
"bne %[frow], %[loop_end], 0b \n\t"
" sb %[temp0], -2(%[dst]) \n\t"
"1: \n\t"
"beqz %[rest], 3f \n\t"
" nop \n\t"
"addiu %[temp6], $zero, -256 \n\t"
"addiu %[temp7], $zero, 255 \n\t"
"lw %[temp0], 0(%[frow]) \n\t"
"sll %[temp0], %[temp0], 1 \n\t"
"mulq_rs.w %[temp1], %[temp0], %[yscale] \n\t"
"lw %[temp0], 0(%[irow]) \n\t"
"subu %[temp0], %[temp0], %[temp1] \n\t"
"sll %[temp0], %[temp0], 1 \n\t"
"mulq_rs.w %[temp5], %[temp0], %[temp2] \n\t"
"sw %[temp1], 0(%[irow]) \n\t"
"and %[temp0], %[temp5], %[temp6] \n\t"
"beqz %[temp0], 2f \n\t"
" slti %[temp1], %[temp5], 0 \n\t"
"xor %[temp5], %[temp5], %[temp5] \n\t"
"movz %[temp5], %[temp7], %[temp1] \n\t"
"2: \n\t"
"sb %[temp5], 0(%[dst]) \n\t"
"3: \n\t"
".set pop \n\t"
: [temp0]"=&r"(temp0), [temp1]"=&r"(temp1), [temp3]"=&r"(temp3),
[temp4]"=&r"(temp4), [temp5]"=&r"(temp5), [temp6]"=&r"(temp6),
[temp7]"=&r"(temp7), [frow]"+&r"(frow), [irow]"+&r"(irow),
[dst]"+&r"(dst)
: [temp2]"r"(temp2), [yscale]"r"(yscale), [loop_end]"r"(loop_end),
[rest]"r"(rest)
: "memory", "hi", "lo"
);
} else {
for (; x_out < x_out_max; ++x_out) {
const int frac = (int)MULT_FIX(frow[x_out], yscale);
const int v = (int)MULT_FIX(irow[x_out] - frac, wrk->fxy_scale);
dst[x_out] = (!(v & ~0xff)) ? v : (v < 0) ? 0 : 255;
irow[x_out] = frac; // new fractional start
}
}
wrk->y_accum += wrk->y_add;
wrk->dst += wrk->dst_stride;
}
}
#undef MULT_FIX
#undef RFIX
#endif // WEBP_USE_MIPS_DSP_R2
//------------------------------------------------------------------------------
// Entry point
extern WEBP_TSAN_IGNORE_FUNCTION void WebPRescalerDspInitMIPSdspR2(void);
WEBP_TSAN_IGNORE_FUNCTION void WebPRescalerDspInitMIPSdspR2(void) {
#if defined(WEBP_USE_MIPS_DSP_R2)
WebPRescalerImportRow = ImportRow;
WebPRescalerExportRow = ExportRow;
#endif // WEBP_USE_MIPS_DSP_R2
}

470
src/utils/rescaler.c
View File

@ -14,476 +14,6 @@
#include <assert.h>
#include <stdlib.h>
#include "./rescaler.h"
#include "../dsp/dsp.h"
//------------------------------------------------------------------------------
// Implementations of critical functions ImportRow / ExportRow
void (*WebPRescalerImportRow)(WebPRescaler* const wrk,
const uint8_t* const src, int channel) = NULL;
void (*WebPRescalerExportRow)(WebPRescaler* const wrk, int x_out) = NULL;
#define RFIX 30
#define MULT_FIX(x, y) (((int64_t)(x) * (y) + (1 << (RFIX - 1))) >> RFIX)
static void ImportRowC(WebPRescaler* const wrk,
const uint8_t* const src, int channel) {
const int x_stride = wrk->num_channels;
const int x_out_max = wrk->dst_width * wrk->num_channels;
int x_in = channel;
int x_out;
int accum = 0;
if (!wrk->x_expand) {
int sum = 0;
for (x_out = channel; x_out < x_out_max; x_out += x_stride) {
accum += wrk->x_add;
for (; accum > 0; accum -= wrk->x_sub) {
sum += src[x_in];
x_in += x_stride;
}
{ // Emit next horizontal pixel.
const int32_t base = src[x_in];
const int32_t frac = base * (-accum);
x_in += x_stride;
wrk->frow[x_out] = (sum + base) * wrk->x_sub - frac;
// fresh fractional start for next pixel
sum = (int)MULT_FIX(frac, wrk->fx_scale);
}
}
} else { // simple bilinear interpolation
int left = src[channel], right = src[channel];
for (x_out = channel; x_out < x_out_max; x_out += x_stride) {
if (accum < 0) {
left = right;
x_in += x_stride;
right = src[x_in];
accum += wrk->x_add;
}
wrk->frow[x_out] = right * wrk->x_add + (left - right) * accum;
accum -= wrk->x_sub;
}
}
// Accumulate the contribution of the new row.
for (x_out = channel; x_out < x_out_max; x_out += x_stride) {
wrk->irow[x_out] += wrk->frow[x_out];
}
}
static void ExportRowC(WebPRescaler* const wrk, int x_out) {
if (wrk->y_accum <= 0) {
uint8_t* const dst = wrk->dst;
int32_t* const irow = wrk->irow;
const int32_t* const frow = wrk->frow;
const int yscale = wrk->fy_scale * (-wrk->y_accum);
const int x_out_max = wrk->dst_width * wrk->num_channels;
for (; x_out < x_out_max; ++x_out) {
const int frac = (int)MULT_FIX(frow[x_out], yscale);
const int v = (int)MULT_FIX(irow[x_out] - frac, wrk->fxy_scale);
dst[x_out] = (!(v & ~0xff)) ? v : (v < 0) ? 0 : 255;
irow[x_out] = frac; // new fractional start
}
wrk->y_accum += wrk->y_add;
wrk->dst += wrk->dst_stride;
}
}
//------------------------------------------------------------------------------
// MIPS version
#if defined(WEBP_USE_MIPS32)
static void ImportRowMIPS(WebPRescaler* const wrk,
const uint8_t* const src, int channel) {
const int x_stride = wrk->num_channels;
const int x_out_max = wrk->dst_width * wrk->num_channels;
const int fx_scale = wrk->fx_scale;
const int x_add = wrk->x_add;
const int x_sub = wrk->x_sub;
int* frow = wrk->frow + channel;
int* irow = wrk->irow + channel;
const uint8_t* src1 = src + channel;
int temp1, temp2, temp3;
int base, frac, sum;
int accum, accum1;
const int x_stride1 = x_stride << 2;
int loop_c = x_out_max - channel;
if (!wrk->x_expand) {
__asm__ volatile (
"li %[temp1], 0x8000 \n\t"
"li %[temp2], 0x10000 \n\t"
"li %[sum], 0 \n\t"
"li %[accum], 0 \n\t"
"1: \n\t"
"addu %[accum], %[accum], %[x_add] \n\t"
"blez %[accum], 3f \n\t"
"2: \n\t"
"lbu %[temp3], 0(%[src1]) \n\t"
"subu %[accum], %[accum], %[x_sub] \n\t"
"addu %[src1], %[src1], %[x_stride] \n\t"
"addu %[sum], %[sum], %[temp3] \n\t"
"bgtz %[accum], 2b \n\t"
"3: \n\t"
"lbu %[base], 0(%[src1]) \n\t"
"addu %[src1], %[src1], %[x_stride] \n\t"
"negu %[accum1], %[accum] \n\t"
"mul %[frac], %[base], %[accum1] \n\t"
"addu %[temp3], %[sum], %[base] \n\t"
"mul %[temp3], %[temp3], %[x_sub] \n\t"
"lw %[base], 0(%[irow]) \n\t"
"subu %[loop_c], %[loop_c], %[x_stride] \n\t"
"sll %[accum1], %[frac], 2 \n\t"
"mult %[temp1], %[temp2] \n\t"
"madd %[accum1], %[fx_scale] \n\t"
"mfhi %[sum] \n\t"
"subu %[temp3], %[temp3], %[frac] \n\t"
"sw %[temp3], 0(%[frow]) \n\t"
"add %[base], %[base], %[temp3] \n\t"
"sw %[base], 0(%[irow]) \n\t"
"addu %[irow], %[irow], %[x_stride1] \n\t"
"addu %[frow], %[frow], %[x_stride1] \n\t"
"bgtz %[loop_c], 1b \n\t"
: [accum] "=&r" (accum), [src1] "+r" (src1), [temp3] "=&r" (temp3),
[sum] "=&r" (sum), [base] "=&r" (base), [frac] "=&r" (frac),
[frow] "+r" (frow), [irow] "+r" (irow), [accum1] "=&r" (accum1),
[temp2] "=&r" (temp2), [temp1] "=&r" (temp1)
: [x_stride] "r" (x_stride), [fx_scale] "r" (fx_scale),
[x_sub] "r" (x_sub), [x_add] "r" (x_add),
[loop_c] "r" (loop_c), [x_stride1] "r" (x_stride1)
: "memory", "hi", "lo"
);
} else {
__asm__ volatile (
"lbu %[temp1], 0(%[src1]) \n\t"
"move %[temp2], %[temp1] \n\t"
"li %[accum], 0 \n\t"
"1: \n\t"
"bgez %[accum], 2f \n\t"
"move %[temp2], %[temp1] \n\t"
"addu %[src1], %[x_stride] \n\t"
"lbu %[temp1], 0(%[src1]) \n\t"
"addu %[accum], %[x_add] \n\t"
"2: \n\t"
"subu %[temp3], %[temp2], %[temp1] \n\t"
"mul %[temp3], %[temp3], %[accum] \n\t"
"mul %[base], %[temp1], %[x_add] \n\t"
"subu %[accum], %[accum], %[x_sub] \n\t"
"lw %[frac], 0(%[irow]) \n\t"
"subu %[loop_c], %[loop_c], %[x_stride] \n\t"
"addu %[temp3], %[base], %[temp3] \n\t"
"sw %[temp3], 0(%[frow]) \n\t"
"addu %[frow], %[x_stride1] \n\t"
"addu %[frac], %[temp3] \n\t"
"sw %[frac], 0(%[irow]) \n\t"
"addu %[irow], %[x_stride1] \n\t"
"bgtz %[loop_c], 1b \n\t"
: [src1] "+r" (src1), [accum] "=&r" (accum), [temp1] "=&r" (temp1),
[temp2] "=&r" (temp2), [temp3] "=&r" (temp3), [base] "=&r" (base),
[frac] "=&r" (frac), [frow] "+r" (frow), [irow] "+r" (irow)
: [x_stride] "r" (x_stride), [x_add] "r" (x_add), [x_sub] "r" (x_sub),
[x_stride1] "r" (x_stride1), [loop_c] "r" (loop_c)
: "memory", "hi", "lo"
);
}
}
static void ExportRowMIPS(WebPRescaler* const wrk, int x_out) {
if (wrk->y_accum <= 0) {
uint8_t* const dst = wrk->dst;
int32_t* const irow = wrk->irow;
const int32_t* const frow = wrk->frow;
const int yscale = wrk->fy_scale * (-wrk->y_accum);
const int x_out_max = wrk->dst_width * wrk->num_channels;
// if wrk->fxy_scale can fit into 32 bits use optimized code,
// otherwise use C code
if ((wrk->fxy_scale >> 32) == 0) {
int temp0, temp1, temp3, temp4, temp5, temp6, temp7, loop_end;
const int temp2 = (int)(wrk->fxy_scale);
const int temp8 = x_out_max << 2;
uint8_t* dst_t = (uint8_t*)dst;
int32_t* irow_t = (int32_t*)irow;
const int32_t* frow_t = (const int32_t*)frow;
__asm__ volatile(
"addiu %[temp6], $zero, -256 \n\t"
"addiu %[temp7], $zero, 255 \n\t"
"li %[temp3], 0x10000 \n\t"
"li %[temp4], 0x8000 \n\t"
"addu %[loop_end], %[frow_t], %[temp8] \n\t"
"1: \n\t"
"lw %[temp0], 0(%[frow_t]) \n\t"
"mult %[temp3], %[temp4] \n\t"
"addiu %[frow_t], %[frow_t], 4 \n\t"
"sll %[temp0], %[temp0], 2 \n\t"
"madd %[temp0], %[yscale] \n\t"
"mfhi %[temp1] \n\t"
"lw %[temp0], 0(%[irow_t]) \n\t"
"addiu %[dst_t], %[dst_t], 1 \n\t"
"addiu %[irow_t], %[irow_t], 4 \n\t"
"subu %[temp0], %[temp0], %[temp1] \n\t"
"mult %[temp3], %[temp4] \n\t"
"sll %[temp0], %[temp0], 2 \n\t"
"madd %[temp0], %[temp2] \n\t"
"mfhi %[temp5] \n\t"
"sw %[temp1], -4(%[irow_t]) \n\t"
"and %[temp0], %[temp5], %[temp6] \n\t"
"slti %[temp1], %[temp5], 0 \n\t"
"beqz %[temp0], 2f \n\t"
"xor %[temp5], %[temp5], %[temp5] \n\t"
"movz %[temp5], %[temp7], %[temp1] \n\t"
"2: \n\t"
"sb %[temp5], -1(%[dst_t]) \n\t"
"bne %[frow_t], %[loop_end], 1b \n\t"
: [temp0]"=&r"(temp0), [temp1]"=&r"(temp1), [temp3]"=&r"(temp3),
[temp4]"=&r"(temp4), [temp5]"=&r"(temp5), [temp6]"=&r"(temp6),
[temp7]"=&r"(temp7), [frow_t]"+r"(frow_t), [irow_t]"+r"(irow_t),
[dst_t]"+r"(dst_t), [loop_end]"=&r"(loop_end)
: [temp2]"r"(temp2), [yscale]"r"(yscale), [temp8]"r"(temp8)
: "memory", "hi", "lo"
);
wrk->y_accum += wrk->y_add;
wrk->dst += wrk->dst_stride;
} else {
ExportRowC(wrk, x_out);
}
}
}
#endif // WEBP_USE_MIPS32
#if defined(WEBP_USE_MIPS_DSP_R2)
static void ImportRowMIPS_dsp_r2(WebPRescaler* const wrk,
const uint8_t* const src, int channel) {
const int x_stride = wrk->num_channels;
const int x_out_max = wrk->dst_width * wrk->num_channels;
const int fx_scale = wrk->fx_scale;
const int x_add = wrk->x_add;
const int x_sub = wrk->x_sub;
int* frow = wrk->frow + channel;
int* irow = wrk->irow + channel;
const uint8_t* src1 = src + channel;
int temp1, temp2, temp3;
int base, frac, sum;
int accum, accum1;
const int x_stride1 = x_stride << 2;
int loop_c = x_out_max - channel;
if (!wrk->x_expand) {
__asm__ volatile (
"li %[sum], 0 \n\t"
"li %[accum], 0 \n\t"
"1: \n\t"
"addu %[accum], %[accum], %[x_add] \n\t"
"blez %[accum], 3f \n\t"
"2: \n\t"
"lbu %[temp3], 0(%[src1]) \n\t"
"subu %[accum], %[accum], %[x_sub] \n\t"
"addu %[src1], %[src1], %[x_stride] \n\t"
"addu %[sum], %[sum], %[temp3] \n\t"
"bgtz %[accum], 2b \n\t"
"3: \n\t"
"lbu %[base], 0(%[src1]) \n\t"
"addu %[src1], %[src1], %[x_stride] \n\t"
"negu %[accum1], %[accum] \n\t"
"mul %[frac], %[base], %[accum1] \n\t"
"addu %[temp3], %[sum], %[base] \n\t"
"mul %[temp3], %[temp3], %[x_sub] \n\t"
"lw %[base], 0(%[irow]) \n\t"
"sll %[accum1], %[frac], 1 \n\t"
"subu %[loop_c], %[loop_c], %[x_stride] \n\t"
"mulq_rs.w %[sum], %[accum1], %[fx_scale] \n\t"
"subu %[temp3], %[temp3], %[frac] \n\t"
"sw %[temp3], 0(%[frow]) \n\t"
"add %[base], %[base], %[temp3] \n\t"
"sw %[base], 0(%[irow]) \n\t"
"addu %[irow], %[irow], %[x_stride1] \n\t"
"addu %[frow], %[frow], %[x_stride1] \n\t"
"bgtz %[loop_c], 1b \n\t"
: [accum]"=&r"(accum), [src1]"+&r"(src1), [temp3]"=&r"(temp3),
[sum]"=&r"(sum), [base]"=&r"(base), [frac]"=&r"(frac),
[frow]"+&r"(frow), [irow]"+&r"(irow), [accum1]"=&r"(accum1),
[loop_c]"+&r"(loop_c)
: [x_stride]"r"(x_stride), [fx_scale]"r"(fx_scale), [x_sub]"r"(x_sub),
[x_add] "r" (x_add), [x_stride1] "r" (x_stride1)
: "memory", "hi", "lo"
);
} else {
__asm__ volatile (
"lbu %[temp1], 0(%[src1]) \n\t"
"move %[temp2], %[temp1] \n\t"
"li %[accum], 0 \n\t"
"1: \n\t"
"bgez %[accum], 2f \n\t"
"move %[temp2], %[temp1] \n\t"
"addu %[src1], %[x_stride] \n\t"
"lbu %[temp1], 0(%[src1]) \n\t"
"addu %[accum], %[x_add] \n\t"
"2: \n\t"
"subu %[temp3], %[temp2], %[temp1] \n\t"
"mul %[temp3], %[temp3], %[accum] \n\t"
"mul %[base], %[temp1], %[x_add] \n\t"
"subu %[accum], %[accum], %[x_sub] \n\t"
"lw %[frac], 0(%[irow]) \n\t"
"subu %[loop_c], %[loop_c], %[x_stride] \n\t"
"addu %[temp3], %[base], %[temp3] \n\t"
"sw %[temp3], 0(%[frow]) \n\t"
"addu %[frow], %[x_stride1] \n\t"
"addu %[frac], %[temp3] \n\t"
"sw %[frac], 0(%[irow]) \n\t"
"addu %[irow], %[x_stride1] \n\t"
"bgtz %[loop_c], 1b \n\t"
: [src1]"+&r"(src1), [accum]"=&r"(accum), [temp1]"=&r"(temp1),
[temp2]"=&r"(temp2), [temp3]"=&r"(temp3), [base]"=&r"(base),
[frac]"=&r"(frac), [frow]"+&r"(frow), [irow]"+&r"(irow),
[loop_c]"+&r"(loop_c)
: [x_stride]"r"(x_stride), [x_add]"r"(x_add), [x_sub]"r"(x_sub),
[x_stride1]"r"(x_stride1)
: "memory", "hi", "lo"
);
}
}
static void ExportRowMIPS_dsp_r2(WebPRescaler* const wrk, int x_out) {
if (wrk->y_accum <= 0) {
uint8_t* dst = wrk->dst;
int32_t* irow = wrk->irow;
const int32_t* frow = wrk->frow;
const int yscale = wrk->fy_scale * (-wrk->y_accum);
const int x_out_max = wrk->dst_width * wrk->num_channels;
// if wrk->fxy_scale can fit into 32 bits use optimized code,
// otherwise use C code
if ((wrk->fxy_scale >> 32) == 0) {
int temp0, temp1, temp3, temp4, temp5, temp6, temp7;
const int temp2 = (int)wrk->fxy_scale;
const int rest = (x_out_max - x_out) & 1;
const int32_t* const loop_end = frow + (x_out_max - x_out) - rest;
__asm__ volatile (
".set push \n\t"
".set noreorder \n\t"
"beq %[frow], %[loop_end], 1f \n\t"
" nop \n\t"
"0: \n\t"
"lw %[temp0], 0(%[frow]) \n\t"
"lw %[temp1], 0(%[irow]) \n\t"
"lw %[temp3], 4(%[frow]) \n\t"
"lw %[temp4], 4(%[irow]) \n\t"
"sll %[temp0], %[temp0], 1 \n\t"
"sll %[temp3], %[temp3], 1 \n\t"
"mulq_rs.w %[temp5], %[temp0], %[yscale] \n\t"
"mulq_rs.w %[temp6], %[temp3], %[yscale] \n\t"
"addiu %[frow], %[frow], 8 \n\t"
"addiu %[dst], %[dst], 2 \n\t"
"addiu %[irow], %[irow], 8 \n\t"
"subu %[temp1], %[temp1], %[temp5] \n\t"
"subu %[temp4], %[temp4], %[temp6] \n\t"
"sll %[temp1], %[temp1], 1 \n\t"
"sll %[temp4], %[temp4], 1 \n\t"
"mulq_rs.w %[temp0], %[temp1], %[temp2] \n\t"
"mulq_rs.w %[temp3], %[temp4], %[temp2] \n\t"
"sw %[temp5], -8(%[irow]) \n\t"
"sw %[temp6], -4(%[irow]) \n\t"
"shll_s.ph %[temp0], %[temp0], 7 \n\t"
"shll_s.ph %[temp3], %[temp3], 7 \n\t"
"precrqu_s.qb.ph %[temp0], %[temp0], %[temp3] \n\t"
"sb %[temp0], -1(%[dst]) \n\t"
"srl %[temp0], %[temp0], 16 \n\t"
"bne %[frow], %[loop_end], 0b \n\t"
" sb %[temp0], -2(%[dst]) \n\t"
"1: \n\t"
"beqz %[rest], 3f \n\t"
" nop \n\t"
"addiu %[temp6], $zero, -256 \n\t"
"addiu %[temp7], $zero, 255 \n\t"
"lw %[temp0], 0(%[frow]) \n\t"
"sll %[temp0], %[temp0], 1 \n\t"
"mulq_rs.w %[temp1], %[temp0], %[yscale] \n\t"
"lw %[temp0], 0(%[irow]) \n\t"
"subu %[temp0], %[temp0], %[temp1] \n\t"
"sll %[temp0], %[temp0], 1 \n\t"
"mulq_rs.w %[temp5], %[temp0], %[temp2] \n\t"
"sw %[temp1], 0(%[irow]) \n\t"
"and %[temp0], %[temp5], %[temp6] \n\t"
"beqz %[temp0], 2f \n\t"
" slti %[temp1], %[temp5], 0 \n\t"
"xor %[temp5], %[temp5], %[temp5] \n\t"
"movz %[temp5], %[temp7], %[temp1] \n\t"
"2: \n\t"
"sb %[temp5], 0(%[dst]) \n\t"
"3: \n\t"
".set pop \n\t"
: [temp0]"=&r"(temp0), [temp1]"=&r"(temp1), [temp3]"=&r"(temp3),
[temp4]"=&r"(temp4), [temp5]"=&r"(temp5), [temp6]"=&r"(temp6),
[temp7]"=&r"(temp7), [frow]"+&r"(frow), [irow]"+&r"(irow),
[dst]"+&r"(dst)
: [temp2]"r"(temp2), [yscale]"r"(yscale), [loop_end]"r"(loop_end),
[rest]"r"(rest)
: "memory", "hi", "lo"
);
wrk->y_accum += wrk->y_add;
wrk->dst += wrk->dst_stride;
} else {
ExportRowC(wrk, x_out);
}
}
}
#endif //WEBP_USE_MIPS_DSP_R2
//------------------------------------------------------------------------------
void WebPRescalerInit(WebPRescaler* const wrk, int src_width, int src_height,
uint8_t* const dst, int dst_width, int dst_height,
int dst_stride, int num_channels, int x_add, int x_sub,
int y_add, int y_sub, int32_t* const work) {
wrk->x_expand = (src_width < dst_width);
wrk->src_width = src_width;
wrk->src_height = src_height;
wrk->dst_width = dst_width;
wrk->dst_height = dst_height;
wrk->dst = dst;
wrk->dst_stride = dst_stride;
wrk->num_channels = num_channels;
// for 'x_expand', we use bilinear interpolation
wrk->x_add = wrk->x_expand ? (x_sub - 1) : x_add - x_sub;
wrk->x_sub = wrk->x_expand ? (x_add - 1) : x_sub;
wrk->y_accum = y_add;
wrk->y_add = y_add;
wrk->y_sub = y_sub;
wrk->fx_scale = (1 << RFIX) / x_sub;
wrk->fy_scale = (1 << RFIX) / y_sub;
wrk->fxy_scale = wrk->x_expand ?
((int64_t)dst_height << RFIX) / (x_sub * src_height) :
((int64_t)dst_height << RFIX) / (x_add * src_height);
wrk->irow = work;
wrk->frow = work + num_channels * dst_width;
if (WebPRescalerImportRow == NULL) {
WebPRescalerImportRow = ImportRowC;
WebPRescalerExportRow = ExportRowC;
if (VP8GetCPUInfo != NULL) {
#if defined(WEBP_USE_MIPS32)
if (VP8GetCPUInfo(kMIPS32)) {
WebPRescalerImportRow = ImportRowMIPS;
WebPRescalerExportRow = ExportRowMIPS;
}
#endif
#if defined(WEBP_USE_MIPS_DSP_R2)
if (VP8GetCPUInfo(kMIPSdspR2)) {
WebPRescalerImportRow = ImportRowMIPS_dsp_r2;
WebPRescalerExportRow = ExportRowMIPS_dsp_r2;
}
#endif
}
}
}
#undef MULT_FIX
#undef RFIX
//------------------------------------------------------------------------------
// all-in-one calls