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libyuv/source/scale.cc
mikhal@webrtc.org aed1cc94c1 first draft 
git-svn-id: http://libyuv.googlecode.com/svn/trunk@2 16f28f9a-4ce2-e073-06de-1de4eb20be90
2011-09-28 00:06:25 +00:00

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/*
* Copyright (c) 2011 The LibYuv 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 "scale.h"
#include <string.h>
#include "common.h"
#include "cpu_id.h"
// Note: A Neon reference manual
// http://infocenter.arm.com/help/index.jsp?topic=/com.arm.doc.dui0204j/CJAJIIGG.html
// Note: Some SSE2 reference manuals
// cpuvol1.pdf agner_instruction_tables.pdf 253666.pdf 253667.pdf
// TODO(fbarchard): Remove once performance is known
//#define TEST_RSTSC
#if defined(TEST_RSTSC)
#include <iomanip>
#include <iostream>
#ifdef _MSC_VER
#include <emmintrin.h>
#endif
#if defined(__GNUC__) && defined(__i386__)
static inline uint64 __rdtsc(void) {
uint32_t a, d;
__asm__ volatile("rdtsc" : "=a" (a), "=d" (d));
return ((uint64)d << 32) + a;
}
#endif
#endif
namespace libyuv {
// Set the following flag to true to revert to only
// using the reference implementation ScalePlaneBox(), and
// NOT the optimized versions. Useful for debugging and
// when comparing the quality of the resulting YUV planes
// as produced by the optimized and non-optimized versions.
bool YuvScaler::use_reference_impl_ = false;
/**
* NEON downscalers with interpolation.
*
* Provided by Fritz Koenig
*
*/
#if defined(__ARM_NEON__) && !defined(COVERAGE_ENABLED)
#define HAS_SCALEROWDOWN2_NEON
void ScaleRowDown2_NEON(const uint8* iptr, int32 /* istride */,
uint8* dst, int32 owidth) {
__asm__ volatile
(
"1:\n"
"vld2.u8 {q0,q1}, [%0]! \n" // load even pixels into q0, odd into q1
"vst1.u8 {q0}, [%1]! \n" // store even pixels
"subs %2, %2, #16 \n" // 16 processed per loop
"bhi 1b \n"
: // Output registers
: "r"(iptr), "r"(dst), "r"(owidth) // Input registers
: "r4", "q0", "q1" // Clobber List
);
}
void ScaleRowDown2Int_NEON(const uint8* iptr, int32 istride,
uint8* dst, int32 owidth) {
__asm__ volatile
(
"mov r4, #2 \n" // rounding constant
"add %1, %0 \n" // l2
"vdup.16 q4, r4 \n"
"1:\n"
"vld1.u8 {q0,q1}, [%0]! \n" // load l1 and post increment
"vld1.u8 {q2,q3}, [%1]! \n" // load l2 and post increment
"vpaddl.u8 q0, q0 \n" // l1 add adjacent
"vpaddl.u8 q1, q1 \n"
"vpadal.u8 q0, q2 \n" // l2 add adjacent and add l1 to l2
"vpadal.u8 q1, q3 \n"
"vadd.u16 q0, q4 \n" // rounding
"vadd.u16 q1, q4 \n"
"vshrn.u16 d0, q0, #2 \n" // downshift and pack
"vshrn.u16 d1, q1, #2 \n"
"vst1.u8 {q0}, [%2]! \n"
"subs %3, %3, #16 \n" // 16 processed per loop
"bhi 1b \n"
: // Output registers
: "r"(iptr), "r"(istride), "r"(dst), "r"(owidth) // Input registers
: "r4", "q0", "q1", "q2", "q3", "q4" // Clobber List
);
}
/**
* SSE2 downscalers with interpolation.
*
* Provided by Frank Barchard (fbarchard@google.com)
*
*/
// Constants for SSE2 code
#elif (defined(WIN32) || defined(__i386__)) && !defined(COVERAGE_ENABLED) && \
!defined(__PIC__) && !TARGET_IPHONE_SIMULATOR
#if defined(_MSC_VER)
#define TALIGN16(t, var) __declspec(align(16)) t _ ## var
#elif defined(OSX)
#define TALIGN16(t, var) t var __attribute__((aligned(16)))
#else
#define TALIGN16(t, var) t _ ## var __attribute__((aligned(16)))
#endif
// Offsets for source bytes 0 to 9
extern "C" TALIGN16(const uint8, shuf0[16]) =
{ 0, 1, 3, 4, 5, 7, 8, 9, 128, 128, 128, 128, 128, 128, 128, 128 };
// Offsets for source bytes 11 to 20 with 8 subtracted = 3 to 12.
extern "C" TALIGN16(const uint8, shuf1[16]) =
{ 3, 4, 5, 7, 8, 9, 11, 12, 128, 128, 128, 128, 128, 128, 128, 128 };
// Offsets for source bytes 21 to 31 with 16 subtracted = 5 to 31.
extern "C" TALIGN16(const uint8, shuf2[16]) =
{ 5, 7, 8, 9, 11, 12, 13, 15, 128, 128, 128, 128, 128, 128, 128, 128 };
// Offsets for source bytes 0 to 10
extern "C" TALIGN16(const uint8, shuf01[16]) =
{ 0, 1, 1, 2, 2, 3, 4, 5, 5, 6, 6, 7, 8, 9, 9, 10 };
// Offsets for source bytes 10 to 21 with 8 subtracted = 3 to 13.
extern "C" TALIGN16(const uint8, shuf11[16]) =
{ 2, 3, 4, 5, 5, 6, 6, 7, 8, 9, 9, 10, 10, 11, 12, 13 };
// Offsets for source bytes 21 to 31 with 16 subtracted = 5 to 31.
extern "C" TALIGN16(const uint8, shuf21[16]) =
{ 5, 6, 6, 7, 8, 9, 9, 10, 10, 11, 12, 13, 13, 14, 14, 15 };
// Coefficients for source bytes 0 to 10
extern "C" TALIGN16(const uint8, madd01[16]) =
{ 3, 1, 2, 2, 1, 3, 3, 1, 2, 2, 1, 3, 3, 1, 2, 2 };
// Coefficients for source bytes 10 to 21
extern "C" TALIGN16(const uint8, madd11[16]) =
{ 1, 3, 3, 1, 2, 2, 1, 3, 3, 1, 2, 2, 1, 3, 3, 1 };
// Coefficients for source bytes 21 to 31
extern "C" TALIGN16(const uint8, madd21[16]) =
{ 2, 2, 1, 3, 3, 1, 2, 2, 1, 3, 3, 1, 2, 2, 1, 3 };
// Coefficients for source bytes 21 to 31
extern "C" TALIGN16(const int16, round34[8]) =
{ 2, 2, 2, 2, 2, 2, 2, 2 };
extern "C" TALIGN16(const uint8, shuf38a[16]) =
{ 0, 3, 6, 8, 11, 14, 128, 128, 128, 128, 128, 128, 128, 128, 128, 128 };
extern "C" TALIGN16(const uint8, shuf38b[16]) =
{ 128, 128, 128, 128, 128, 128, 0, 3, 6, 8, 11, 14, 128, 128, 128, 128 };
// Arrange words 0,3,6 into 0,1,2
extern "C" TALIGN16(const uint8, shufac0[16]) =
{ 0, 1, 6, 7, 12, 13, 128, 128, 128, 128, 128, 128, 128, 128, 128, 128 };
// Arrange words 0,3,6 into 3,4,5
extern "C" TALIGN16(const uint8, shufac3[16]) =
{ 128, 128, 128, 128, 128, 128, 0, 1, 6, 7, 12, 13, 128, 128, 128, 128 };
// Scaling values for boxes of 3x3 and 2x3
extern "C" TALIGN16(const uint16, scaleac3[8]) =
{ 65536 / 9, 65536 / 9, 65536 / 6, 65536 / 9, 65536 / 9, 65536 / 6, 0, 0 };
// Arrange first value for pixels 0,1,2,3,4,5
extern "C" TALIGN16(const uint8, shufab0[16]) =
{ 0, 128, 3, 128, 6, 128, 8, 128, 11, 128, 14, 128, 128, 128, 128, 128 };
// Arrange second value for pixels 0,1,2,3,4,5
extern "C" TALIGN16(const uint8, shufab1[16]) =
{ 1, 128, 4, 128, 7, 128, 9, 128, 12, 128, 15, 128, 128, 128, 128, 128 };
// Arrange third value for pixels 0,1,2,3,4,5
extern "C" TALIGN16(const uint8, shufab2[16]) =
{ 2, 128, 5, 128, 128, 128, 10, 128, 13, 128, 128, 128, 128, 128, 128, 128 };
// Scaling values for boxes of 3x2 and 2x2
extern "C" TALIGN16(const uint16, scaleab2[8]) =
{ 65536 / 3, 65536 / 3, 65536 / 2, 65536 / 3, 65536 / 3, 65536 / 2, 0, 0 };
#endif
#if defined(WIN32) && !defined(COVERAGE_ENABLED)
#define HAS_SCALEROWDOWN2_SSE2
// Reads 32 pixels, throws half away and writes 16 pixels.
// Alignment requirement: iptr 16 byte aligned, optr 16 byte aligned.
__declspec(naked)
static void ScaleRowDown2_SSE2(const uint8* iptr, int32 istride,
uint8* optr, int32 owidth) {
__asm {
mov eax, [esp + 4] // iptr
// istride ignored
mov edx, [esp + 12] // optr
mov ecx, [esp + 16] // owidth
pcmpeqb xmm7, xmm7 // generate mask 0x00ff00ff
psrlw xmm7, 8
wloop:
movdqa xmm0, [eax]
movdqa xmm1, [eax + 16]
lea eax, [eax + 32]
pand xmm0, xmm7
pand xmm1, xmm7
packuswb xmm0, xmm1
movdqa [edx], xmm0
lea edx, [edx + 16]
sub ecx, 16
ja wloop
ret
}
}
// Blends 32x2 rectangle to 16x1.
// Alignment requirement: iptr 16 byte aligned, optr 16 byte aligned.
__declspec(naked)
static void ScaleRowDown2Int_SSE2(const uint8* iptr, int32 istride,
uint8* optr, int32 owidth) {
__asm {
push esi
mov eax, [esp + 4 + 4] // iptr
mov esi, [esp + 4 + 8] // istride
mov edx, [esp + 4 + 12] // optr
mov ecx, [esp + 4 + 16] // owidth
pcmpeqb xmm7, xmm7 // generate mask 0x00ff00ff
psrlw xmm7, 8
wloop:
movdqa xmm0, [eax]
movdqa xmm1, [eax + 16]
movdqa xmm2, [eax + esi]
movdqa xmm3, [eax + esi + 16]
lea eax, [eax + 32]
pavgb xmm0, xmm2 // average rows
pavgb xmm1, xmm3
movdqa xmm2, xmm0 // average columns (32 to 16 pixels)
psrlw xmm0, 8
movdqa xmm3, xmm1
psrlw xmm1, 8
pand xmm2, xmm7
pand xmm3, xmm7
pavgw xmm0, xmm2
pavgw xmm1, xmm3
packuswb xmm0, xmm1
movdqa [edx], xmm0
lea edx, [edx + 16]
sub ecx, 16
ja wloop
pop esi
ret
}
}
#define HAS_SCALEROWDOWN4_SSE2
// Point samples 32 pixels to 8 pixels.
// Alignment requirement: iptr 16 byte aligned, optr 8 byte aligned.
__declspec(naked)
static void ScaleRowDown4_SSE2(const uint8* iptr, int32 istride,
uint8* orow, int32 owidth) {
__asm {
pushad
mov esi, [esp + 32 + 4] // iptr
// istride ignored
mov edi, [esp + 32 + 12] // orow
mov ecx, [esp + 32 + 16] // owidth
pcmpeqb xmm7, xmm7 // generate mask 0x000000ff
psrld xmm7, 24
wloop:
movdqa xmm0, [esi]
movdqa xmm1, [esi + 16]
lea esi, [esi + 32]
pand xmm0, xmm7
pand xmm1, xmm7
packuswb xmm0, xmm1
packuswb xmm0, xmm0
movq qword ptr [edi], xmm0
lea edi, [edi + 8]
sub ecx, 8
ja wloop
popad
ret
}
}
// Blends 32x4 rectangle to 8x1.
// Alignment requirement: iptr 16 byte aligned, optr 8 byte aligned.
__declspec(naked)
static void ScaleRowDown4Int_SSE2(const uint8* iptr, int32 istride,
uint8* orow, int32 owidth) {
__asm {
pushad
mov esi, [esp + 32 + 4] // iptr
mov ebx, [esp + 32 + 8] // istride
mov edi, [esp + 32 + 12] // orow
mov ecx, [esp + 32 + 16] // owidth
pcmpeqb xmm7, xmm7 // generate mask 0x00ff00ff
psrlw xmm7, 8
lea edx, [ebx + ebx * 2] // istride * 3
wloop:
movdqa xmm0, [esi]
movdqa xmm1, [esi + 16]
movdqa xmm2, [esi + ebx]
movdqa xmm3, [esi + ebx + 16]
pavgb xmm0, xmm2 // average rows
pavgb xmm1, xmm3
movdqa xmm2, [esi + ebx * 2]
movdqa xmm3, [esi + ebx * 2 + 16]
movdqa xmm4, [esi + edx]
movdqa xmm5, [esi + edx + 16]
lea esi, [esi + 32]
pavgb xmm2, xmm4
pavgb xmm3, xmm5
pavgb xmm0, xmm2
pavgb xmm1, xmm3
movdqa xmm2, xmm0 // average columns (32 to 16 pixels)
psrlw xmm0, 8
movdqa xmm3, xmm1
psrlw xmm1, 8
pand xmm2, xmm7
pand xmm3, xmm7
pavgw xmm0, xmm2
pavgw xmm1, xmm3
packuswb xmm0, xmm1
movdqa xmm2, xmm0 // average columns (16 to 8 pixels)
psrlw xmm0, 8
pand xmm2, xmm7
pavgw xmm0, xmm2
packuswb xmm0, xmm0
movq qword ptr [edi], xmm0
lea edi, [edi + 8]
sub ecx, 8
ja wloop
popad
ret
}
}
#define HAS_SCALEROWDOWN8_SSE2
// Point samples 32 pixels to 4 pixels.
// Alignment requirement: iptr 16 byte aligned, optr 4 byte aligned.
__declspec(naked)
static void ScaleRowDown8_SSE2(const uint8* iptr, int32 istride,
uint8* orow, int32 owidth) {
__asm {
pushad
mov esi, [esp + 32 + 4] // iptr
// istride ignored
mov edi, [esp + 32 + 12] // orow
mov ecx, [esp + 32 + 16] // owidth
pcmpeqb xmm7, xmm7 // generate mask isolating 1 in 8 bytes
psrlq xmm7, 56
wloop:
movdqa xmm0, [esi]
movdqa xmm1, [esi + 16]
lea esi, [esi + 32]
pand xmm0, xmm7
pand xmm1, xmm7
packuswb xmm0, xmm1 // 32->16
packuswb xmm0, xmm0 // 16->8
packuswb xmm0, xmm0 // 8->4
movd dword ptr [edi], xmm0
lea edi, [edi + 4]
sub ecx, 4
ja wloop
popad
ret
}
}
// Blends 32x8 rectangle to 4x1.
// Alignment requirement: iptr 16 byte aligned, optr 4 byte aligned.
__declspec(naked)
static void ScaleRowDown8Int_SSE2(const uint8* iptr, int32 istride,
uint8* orow, int32 owidth) {
__asm {
pushad
mov esi, [esp + 32 + 4] // iptr
mov ebx, [esp + 32 + 8] // istride
mov edi, [esp + 32 + 12] // orow
mov ecx, [esp + 32 + 16] // owidth
lea edx, [ebx + ebx * 2] // istride * 3
pxor xmm7, xmm7
wloop:
movdqa xmm0, [esi] // average 8 rows to 1
movdqa xmm1, [esi + 16]
movdqa xmm2, [esi + ebx]
movdqa xmm3, [esi + ebx + 16]
pavgb xmm0, xmm2
pavgb xmm1, xmm3
movdqa xmm2, [esi + ebx * 2]
movdqa xmm3, [esi + ebx * 2 + 16]
movdqa xmm4, [esi + edx]
movdqa xmm5, [esi + edx + 16]
lea ebp, [esi + ebx * 4]
lea esi, [esi + 32]
pavgb xmm2, xmm4
pavgb xmm3, xmm5
pavgb xmm0, xmm2
pavgb xmm1, xmm3
movdqa xmm2, [ebp]
movdqa xmm3, [ebp + 16]
movdqa xmm4, [ebp + ebx]
movdqa xmm5, [ebp + ebx + 16]
pavgb xmm2, xmm4
pavgb xmm3, xmm5
movdqa xmm4, [ebp + ebx * 2]
movdqa xmm5, [ebp + ebx * 2 + 16]
movdqa xmm6, [ebp + edx]
pavgb xmm4, xmm6
movdqa xmm6, [ebp + edx + 16]
pavgb xmm5, xmm6
pavgb xmm2, xmm4
pavgb xmm3, xmm5
pavgb xmm0, xmm2
pavgb xmm1, xmm3
psadbw xmm0, xmm7 // average 32 pixels to 4
psadbw xmm1, xmm7
pshufd xmm0, xmm0, 0xd8 // x1x0 -> xx01
pshufd xmm1, xmm1, 0x8d // x3x2 -> 32xx
por xmm0, xmm1 // -> 3201
psrlw xmm0, 3
packuswb xmm0, xmm0
packuswb xmm0, xmm0
movd dword ptr [edi], xmm0
lea edi, [edi + 4]
sub ecx, 4
ja wloop
popad
ret
}
}
#define HAS_SCALEROWDOWN34_SSSE3
// Point samples 32 pixels to 24 pixels.
// Produces three 8 byte values. For each 8 bytes, 16 bytes are read.
// Then shuffled to do the scaling.
// Note that movdqa+palign may be better than movdqu.
// Alignment requirement: iptr 16 byte aligned, optr 8 byte aligned.
__declspec(naked)
static void ScaleRowDown34_SSSE3(const uint8* iptr, int32 istride,
uint8* orow, int32 owidth) {
__asm {
pushad
mov esi, [esp + 32 + 4] // iptr
// istride ignored
mov edi, [esp + 32 + 12] // orow
mov ecx, [esp + 32 + 16] // owidth
movdqa xmm3, _shuf0
movdqa xmm4, _shuf1
movdqa xmm5, _shuf2
wloop:
movdqa xmm0, [esi]
movdqa xmm2, [esi + 16]
lea esi, [esi + 32]
movdqa xmm1, xmm2
palignr xmm1, xmm0, 8
pshufb xmm0, xmm3
pshufb xmm1, xmm4
pshufb xmm2, xmm5
movq qword ptr [edi], xmm0
movq qword ptr [edi + 8], xmm1
movq qword ptr [edi + 16], xmm2
lea edi, [edi + 24]
sub ecx, 24
ja wloop
popad
ret
}
}
// Blends 32x2 rectangle to 24x1
// Produces three 8 byte values. For each 8 bytes, 16 bytes are read.
// Then shuffled to do the scaling.
// Register usage:
// xmm0 irow 0
// xmm1 irow 1
// xmm2 shuf 0
// xmm3 shuf 1
// xmm4 shuf 2
// xmm5 madd 0
// xmm6 madd 1
// xmm7 round34
// Note that movdqa+palign may be better than movdqu.
// Alignment requirement: iptr 16 byte aligned, optr 8 byte aligned.
__declspec(naked)
static void ScaleRowDown34_1_Int_SSSE3(const uint8* iptr, int32 istride,
uint8* orow, int32 owidth) {
__asm {
pushad
mov esi, [esp + 32 + 4] // iptr
mov ebx, [esp + 32 + 8] // istride
mov edi, [esp + 32 + 12] // orow
mov ecx, [esp + 32 + 16] // owidth
movdqa xmm2, _shuf01
movdqa xmm3, _shuf11
movdqa xmm4, _shuf21
movdqa xmm5, _madd01
movdqa xmm6, _madd11
movdqa xmm7, _round34
wloop:
movdqa xmm0, [esi] // pixels 0..7
movdqa xmm1, [esi+ebx]
pavgb xmm0, xmm1
pshufb xmm0, xmm2
pmaddubsw xmm0, xmm5
paddsw xmm0, xmm7
psrlw xmm0, 2
packuswb xmm0, xmm0
movq qword ptr [edi], xmm0
movdqu xmm0, [esi+8] // pixels 8..15
movdqu xmm1, [esi+ebx+8]
pavgb xmm0, xmm1
pshufb xmm0, xmm3
pmaddubsw xmm0, xmm6
paddsw xmm0, xmm7
psrlw xmm0, 2
packuswb xmm0, xmm0
movq qword ptr [edi+8], xmm0
movdqa xmm0, [esi+16] // pixels 16..23
movdqa xmm1, [esi+ebx+16]
lea esi, [esi+32]
pavgb xmm0, xmm1
pshufb xmm0, xmm4
movdqa xmm1, _madd21
pmaddubsw xmm0, xmm1
paddsw xmm0, xmm7
psrlw xmm0, 2
packuswb xmm0, xmm0
movq qword ptr [edi+16], xmm0
lea edi, [edi+24]
sub ecx, 24
ja wloop
popad
ret
}
}
// Note that movdqa+palign may be better than movdqu.
// Alignment requirement: iptr 16 byte aligned, optr 8 byte aligned.
__declspec(naked)
static void ScaleRowDown34_0_Int_SSSE3(const uint8* iptr, int32 istride,
uint8* orow, int32 owidth) {
__asm {
pushad
mov esi, [esp + 32 + 4] // iptr
mov ebx, [esp + 32 + 8] // istride
mov edi, [esp + 32 + 12] // orow
mov ecx, [esp + 32 + 16] // owidth
movdqa xmm2, _shuf01
movdqa xmm3, _shuf11
movdqa xmm4, _shuf21
movdqa xmm5, _madd01
movdqa xmm6, _madd11
movdqa xmm7, _round34
wloop:
movdqa xmm0, [esi] // pixels 0..7
movdqa xmm1, [esi+ebx]
pavgb xmm1, xmm0
pavgb xmm0, xmm1
pshufb xmm0, xmm2
pmaddubsw xmm0, xmm5
paddsw xmm0, xmm7
psrlw xmm0, 2
packuswb xmm0, xmm0
movq qword ptr [edi], xmm0
movdqu xmm0, [esi+8] // pixels 8..15
movdqu xmm1, [esi+ebx+8]
pavgb xmm1, xmm0
pavgb xmm0, xmm1
pshufb xmm0, xmm3
pmaddubsw xmm0, xmm6
paddsw xmm0, xmm7
psrlw xmm0, 2
packuswb xmm0, xmm0
movq qword ptr [edi+8], xmm0
movdqa xmm0, [esi+16] // pixels 16..23
movdqa xmm1, [esi+ebx+16]
lea esi, [esi+32]
pavgb xmm1, xmm0
pavgb xmm0, xmm1
pshufb xmm0, xmm4
movdqa xmm1, _madd21
pmaddubsw xmm0, xmm1
paddsw xmm0, xmm7
psrlw xmm0, 2
packuswb xmm0, xmm0
movq qword ptr [edi+16], xmm0
lea edi, [edi+24]
sub ecx, 24
ja wloop
popad
ret
}
}
#define HAS_SCALEROWDOWN38_SSSE3
// 3/8 point sampler
// Scale 32 pixels to 12
__declspec(naked)
static void ScaleRowDown38_SSSE3(const uint8* iptr, int32 istride,
uint8* optr, int32 owidth) {
__asm {
pushad
mov esi, [esp + 32 + 4] // iptr
mov edx, [esp + 32 + 8] // istride
mov edi, [esp + 32 + 12] // optr
mov ecx, [esp + 32 + 16] // owidth
movdqa xmm5, _shuf38a
movdqa xmm6, _shuf38b
pxor xmm7, xmm7
xloop:
movdqa xmm0, [esi] // 16 pixels -> 0,1,2,3,4,5
movdqa xmm1, [esi + 16] // 16 pixels -> 6,7,8,9,10,11
lea esi, [esi + 32]
pshufb xmm0, xmm5
pshufb xmm1, xmm6
paddusb xmm0, xmm1
movq qword ptr [edi], xmm0 // write 12 pixels
movhlps xmm1, xmm0
movd [edi + 8], xmm1
lea edi, [edi + 12]
sub ecx, 12
ja xloop
popad
ret
}
}
// Scale 16x3 pixels to 6x1 with interpolation
__declspec(naked)
static void ScaleRowDown38_3_Int_SSSE3(const uint8* iptr, int32 istride,
uint8* optr, int32 owidth) {
__asm {
pushad
mov esi, [esp + 32 + 4] // iptr
mov edx, [esp + 32 + 8] // istride
mov edi, [esp + 32 + 12] // optr
mov ecx, [esp + 32 + 16] // owidth
movdqa xmm4, _shufac0
movdqa xmm5, _shufac3
movdqa xmm6, _scaleac3
pxor xmm7, xmm7
xloop:
movdqa xmm0, [esi] // sum up 3 rows into xmm0/1
movdqa xmm2, [esi + edx]
movhlps xmm1, xmm0
movhlps xmm3, xmm2
punpcklbw xmm0, xmm7
punpcklbw xmm1, xmm7
punpcklbw xmm2, xmm7
punpcklbw xmm3, xmm7
paddusw xmm0, xmm2
paddusw xmm1, xmm3
movdqa xmm2, [esi + edx * 2]
lea esi, [esi + 16]
movhlps xmm3, xmm2
punpcklbw xmm2, xmm7
punpcklbw xmm3, xmm7
paddusw xmm0, xmm2
paddusw xmm1, xmm3
movdqa xmm2, xmm0 // 8 pixels -> 0,1,2 of xmm2
psrldq xmm0, 2
paddusw xmm2, xmm0
psrldq xmm0, 2
paddusw xmm2, xmm0
pshufb xmm2, xmm4
movdqa xmm3, xmm1 // 8 pixels -> 3,4,5 of xmm2
psrldq xmm1, 2
paddusw xmm3, xmm1
psrldq xmm1, 2
paddusw xmm3, xmm1
pshufb xmm3, xmm5
paddusw xmm2, xmm3
pmulhuw xmm2, xmm6 // divide by 9,9,6, 9,9,6
packuswb xmm2, xmm2
movd [edi], xmm2 // write 6 pixels
pextrw eax, xmm2, 2
mov [edi + 4], ax
lea edi, [edi + 6]
sub ecx, 6
ja xloop
popad
ret
}
}
// Scale 16x2 pixels to 6x1 with interpolation
__declspec(naked)
static void ScaleRowDown38_2_Int_SSSE3(const uint8* iptr, int32 istride,
uint8* optr, int32 owidth) {
__asm {
pushad
mov esi, [esp + 32 + 4] // iptr
mov edx, [esp + 32 + 8] // istride
mov edi, [esp + 32 + 12] // optr
mov ecx, [esp + 32 + 16] // owidth
movdqa xmm4, _shufab0
movdqa xmm5, _shufab1
movdqa xmm6, _shufab2
movdqa xmm7, _scaleab2
xloop:
movdqa xmm2, [esi] // average 2 rows into xmm2
pavgb xmm2, [esi + edx]
lea esi, [esi + 16]
movdqa xmm0, xmm2 // 16 pixels -> 0,1,2,3,4,5 of xmm0
pshufb xmm0, xmm4
movdqa xmm1, xmm2
pshufb xmm1, xmm5
paddusw xmm0, xmm1
pshufb xmm2, xmm6
paddusw xmm0, xmm2
pmulhuw xmm0, xmm7 // divide by 3,3,2, 3,3,2
packuswb xmm0, xmm0
movd [edi], xmm0 // write 6 pixels
pextrw eax, xmm0, 2
mov [edi + 4], ax
lea edi, [edi + 6]
sub ecx, 6
ja xloop
popad
ret
}
}
#define HAS_SCALEADDROWS_SSE2
// Reads 8xN bytes and produces 16 shorts at a time.
__declspec(naked)
static void ScaleAddRows_SSE2(const uint8* iptr, int32 istride,
uint16* orow, int32 iwidth, int32 iheight) {
__asm {
pushad
mov esi, [esp + 32 + 4] // iptr
mov edx, [esp + 32 + 8] // istride
mov edi, [esp + 32 + 12] // orow
mov ecx, [esp + 32 + 16] // owidth
mov ebx, [esp + 32 + 20] // height
pxor xmm7, xmm7
dec ebx
xloop:
// first row
movdqa xmm2, [esi]
lea eax, [esi + edx]
movhlps xmm3, xmm2
mov ebp, ebx
punpcklbw xmm2, xmm7
punpcklbw xmm3, xmm7
// sum remaining rows
yloop:
movdqa xmm0, [eax] // read 16 pixels
lea eax, [eax + edx] // advance to next row
movhlps xmm1, xmm0
punpcklbw xmm0, xmm7
punpcklbw xmm1, xmm7
paddusw xmm2, xmm0 // sum 16 words
paddusw xmm3, xmm1
sub ebp, 1
ja yloop
movdqa [edi], xmm2
movdqa [edi + 16], xmm3
lea edi, [edi + 32]
lea esi, [esi + 16]
sub ecx, 16
ja xloop
popad
ret
}
}
// Bilinear row filtering combines 16x2 -> 16x1. SSE2 version.
#define HAS_SCALEFILTERROWS_SSE2
__declspec(naked)
static void ScaleFilterRows_SSE2(uint8* optr, const uint8* iptr0, int32 istride,
int owidth, int source_y_fraction) {
__asm {
push esi
push edi
mov edi, [esp + 8 + 4] // optr
mov esi, [esp + 8 + 8] // iptr0
mov edx, [esp + 8 + 12] // istride
mov ecx, [esp + 8 + 16] // owidth
mov eax, [esp + 8 + 20] // source_y_fraction (0..255)
cmp eax, 0
je xloop1
cmp eax, 128
je xloop2
movd xmm6, eax // xmm6 = y fraction
punpcklwd xmm6, xmm6
pshufd xmm6, xmm6, 0
neg eax // xmm5 = 256 - y fraction
add eax, 256
movd xmm5, eax
punpcklwd xmm5, xmm5
pshufd xmm5, xmm5, 0
pxor xmm7, xmm7
xloop:
movdqa xmm0, [esi]
movdqa xmm2, [esi + edx]
lea esi, [esi + 16]
movdqa xmm1, xmm0
movdqa xmm3, xmm2
punpcklbw xmm0, xmm7
punpcklbw xmm2, xmm7
punpckhbw xmm1, xmm7
punpckhbw xmm3, xmm7
pmullw xmm0, xmm5 // scale row 0
pmullw xmm1, xmm5
pmullw xmm2, xmm6 // scale row 1
pmullw xmm3, xmm6
paddusw xmm0, xmm2 // sum rows
paddusw xmm1, xmm3
psrlw xmm0, 8
psrlw xmm1, 8
packuswb xmm0, xmm1
movdqa [edi], xmm0
lea edi, [edi + 16]
sub ecx, 16
ja xloop
mov al, [edi - 1]
mov [edi], al
pop edi
pop esi
ret
xloop1:
movdqa xmm0, [esi]
lea esi, [esi + 16]
movdqa [edi], xmm0
lea edi, [edi + 16]
sub ecx, 16
ja xloop1
mov al, [edi - 1]
mov [edi], al
pop edi
pop esi
ret
xloop2:
movdqa xmm0, [esi]
movdqa xmm2, [esi + edx]
lea esi, [esi + 16]
pavgb xmm0, xmm2
movdqa [edi], xmm0
lea edi, [edi + 16]
sub ecx, 16
ja xloop2
mov al, [edi - 1]
mov [edi], al
pop edi
pop esi
ret
}
}
// Bilinear row filtering combines 16x2 -> 16x1. SSSE3 version.
#define HAS_SCALEFILTERROWS_SSSE3
__declspec(naked)
static void ScaleFilterRows_SSSE3(uint8* optr, const uint8* iptr0, int32 istride,
int owidth, int source_y_fraction) {
__asm {
push esi
push edi
mov edi, [esp + 8 + 4] // optr
mov esi, [esp + 8 + 8] // iptr0
mov edx, [esp + 8 + 12] // istride
mov ecx, [esp + 8 + 16] // owidth
mov eax, [esp + 8 + 20] // source_y_fraction (0..255)
cmp eax, 0
je xloop1
cmp eax, 128
je xloop2
shr eax, 1
mov ah,al
neg al
add al, 128
movd xmm7, eax
punpcklwd xmm7, xmm7
pshufd xmm7, xmm7, 0
xloop:
movdqa xmm0, [esi]
movdqa xmm2, [esi + edx]
lea esi, [esi + 16]
movdqa xmm1, xmm0
punpcklbw xmm0, xmm2
punpckhbw xmm1, xmm2
pmaddubsw xmm0, xmm7
pmaddubsw xmm1, xmm7
psrlw xmm0, 7
psrlw xmm1, 7
packuswb xmm0, xmm1
movdqa [edi], xmm0
lea edi, [edi + 16]
sub ecx, 16
ja xloop
mov al, [edi - 1]
mov [edi], al
pop edi
pop esi
ret
xloop1:
movdqa xmm0, [esi]
lea esi, [esi + 16]
movdqa [edi], xmm0
lea edi, [edi + 16]
sub ecx, 16
ja xloop1
mov al, [edi - 1]
mov [edi], al
pop edi
pop esi
ret
xloop2:
movdqa xmm0, [esi]
movdqa xmm2, [esi + edx]
lea esi, [esi + 16]
pavgb xmm0, xmm2
movdqa [edi], xmm0
lea edi, [edi + 16]
sub ecx, 16
ja xloop2
mov al, [edi - 1]
mov [edi], al
pop edi
pop esi
ret
}
}
// Note that movdqa+palign may be better than movdqu.
// Alignment requirement: iptr 16 byte aligned, optr 8 byte aligned.
__declspec(naked)
static void ScaleFilterCols34_SSSE3(uint8* optr, const uint8* iptr,
int owidth) {
__asm {
mov edx, [esp + 4] // optr
mov eax, [esp + 8] // iptr
mov ecx, [esp + 12] // owidth
movdqa xmm1, _round34
movdqa xmm2, _shuf01
movdqa xmm3, _shuf11
movdqa xmm4, _shuf21
movdqa xmm5, _madd01
movdqa xmm6, _madd11
movdqa xmm7, _madd21
wloop:
movdqa xmm0, [eax] // pixels 0..7
pshufb xmm0, xmm2
pmaddubsw xmm0, xmm5
paddsw xmm0, xmm1
psrlw xmm0, 2
packuswb xmm0, xmm0
movq qword ptr [edx], xmm0
movdqu xmm0, [eax+8] // pixels 8..15
pshufb xmm0, xmm3
pmaddubsw xmm0, xmm6
paddsw xmm0, xmm1
psrlw xmm0, 2
packuswb xmm0, xmm0
movq qword ptr [edx+8], xmm0
movdqa xmm0, [eax+16] // pixels 16..23
lea eax, [eax+32]
pshufb xmm0, xmm4
pmaddubsw xmm0, xmm7
paddsw xmm0, xmm1
psrlw xmm0, 2
packuswb xmm0, xmm0
movq qword ptr [edx+16], xmm0
lea edx, [edx+24]
sub ecx, 24
ja wloop
ret
}
}
#elif defined(__i386__) && !defined(COVERAGE_ENABLED) && \
!TARGET_IPHONE_SIMULATOR
// GCC versions of row functions are verbatim conversions from Visual C.
// Generated using gcc disassembly on Visual C object file:
// objdump -D yuvscaler.obj >yuvscaler.txt
#define HAS_SCALEROWDOWN2_SSE2
extern "C" void ScaleRowDown2_SSE2(const uint8* iptr, int32 istride,
uint8* orow, int32 owidth);
asm(
".text\n"
#if defined(OSX)
".globl _ScaleRowDown2_SSE2\n"
"_ScaleRowDown2_SSE2:\n"
#else
".global ScaleRowDown2_SSE2\n"
"ScaleRowDown2_SSE2:\n"
#endif
"mov 0x4(%esp),%eax\n"
"mov 0xc(%esp),%edx\n"
"mov 0x10(%esp),%ecx\n"
"pcmpeqb %xmm7,%xmm7\n"
"psrlw $0x8,%xmm7\n"
"1:"
"movdqa (%eax),%xmm0\n"
"movdqa 0x10(%eax),%xmm1\n"
"lea 0x20(%eax),%eax\n"
"pand %xmm7,%xmm0\n"
"pand %xmm7,%xmm1\n"
"packuswb %xmm1,%xmm0\n"
"movdqa %xmm0,(%edx)\n"
"lea 0x10(%edx),%edx\n"
"sub $0x10,%ecx\n"
"ja 1b\n"
"ret\n"
);
extern "C" void ScaleRowDown2Int_SSE2(const uint8* iptr, int32 istride,
uint8* orow, int32 owidth);
asm(
".text\n"
#if defined(OSX)
".globl _ScaleRowDown2Int_SSE2\n"
"_ScaleRowDown2Int_SSE2:\n"
#else
".global ScaleRowDown2Int_SSE2\n"
"ScaleRowDown2Int_SSE2:\n"
#endif
"push %esi\n"
"mov 0x8(%esp),%eax\n"
"mov 0xc(%esp),%esi\n"
"mov 0x10(%esp),%edx\n"
"mov 0x14(%esp),%ecx\n"
"pcmpeqb %xmm7,%xmm7\n"
"psrlw $0x8,%xmm7\n"
"1:"
"movdqa (%eax),%xmm0\n"
"movdqa 0x10(%eax),%xmm1\n"
"movdqa (%eax,%esi,1),%xmm2\n"
"movdqa 0x10(%eax,%esi,1),%xmm3\n"
"lea 0x20(%eax),%eax\n"
"pavgb %xmm2,%xmm0\n"
"pavgb %xmm3,%xmm1\n"
"movdqa %xmm0,%xmm2\n"
"psrlw $0x8,%xmm0\n"
"movdqa %xmm1,%xmm3\n"
"psrlw $0x8,%xmm1\n"
"pand %xmm7,%xmm2\n"
"pand %xmm7,%xmm3\n"
"pavgw %xmm2,%xmm0\n"
"pavgw %xmm3,%xmm1\n"
"packuswb %xmm1,%xmm0\n"
"movdqa %xmm0,(%edx)\n"
"lea 0x10(%edx),%edx\n"
"sub $0x10,%ecx\n"
"ja 1b\n"
"pop %esi\n"
"ret\n"
);
#define HAS_SCALEROWDOWN4_SSE2
extern "C" void ScaleRowDown4_SSE2(const uint8* iptr, int32 istride,
uint8* orow, int32 owidth);
asm(
".text\n"
#if defined(OSX)
".globl _ScaleRowDown4_SSE2\n"
"_ScaleRowDown4_SSE2:\n"
#else
".global ScaleRowDown4_SSE2\n"
"ScaleRowDown4_SSE2:\n"
#endif
"pusha\n"
"mov 0x24(%esp),%esi\n"
"mov 0x2c(%esp),%edi\n"
"mov 0x30(%esp),%ecx\n"
"pcmpeqb %xmm7,%xmm7\n"
"psrld $0x18,%xmm7\n"
"1:"
"movdqa (%esi),%xmm0\n"
"movdqa 0x10(%esi),%xmm1\n"
"lea 0x20(%esi),%esi\n"
"pand %xmm7,%xmm0\n"
"pand %xmm7,%xmm1\n"
"packuswb %xmm1,%xmm0\n"
"packuswb %xmm0,%xmm0\n"
"movq %xmm0,(%edi)\n"
"lea 0x8(%edi),%edi\n"
"sub $0x8,%ecx\n"
"ja 1b\n"
"popa\n"
"ret\n"
);
extern "C" void ScaleRowDown4Int_SSE2(const uint8* iptr, int32 istride,
uint8* orow, int32 owidth);
asm(
".text\n"
#if defined(OSX)
".globl _ScaleRowDown4Int_SSE2\n"
"_ScaleRowDown4Int_SSE2:\n"
#else
".global ScaleRowDown4Int_SSE2\n"
"ScaleRowDown4Int_SSE2:\n"
#endif
"pusha\n"
"mov 0x24(%esp),%esi\n"
"mov 0x28(%esp),%ebx\n"
"mov 0x2c(%esp),%edi\n"
"mov 0x30(%esp),%ecx\n"
"pcmpeqb %xmm7,%xmm7\n"
"psrlw $0x8,%xmm7\n"
"lea (%ebx,%ebx,2),%edx\n"
"1:"
"movdqa (%esi),%xmm0\n"
"movdqa 0x10(%esi),%xmm1\n"
"movdqa (%esi,%ebx,1),%xmm2\n"
"movdqa 0x10(%esi,%ebx,1),%xmm3\n"
"pavgb %xmm2,%xmm0\n"
"pavgb %xmm3,%xmm1\n"
"movdqa (%esi,%ebx,2),%xmm2\n"
"movdqa 0x10(%esi,%ebx,2),%xmm3\n"
"movdqa (%esi,%edx,1),%xmm4\n"
"movdqa 0x10(%esi,%edx,1),%xmm5\n"
"lea 0x20(%esi),%esi\n"
"pavgb %xmm4,%xmm2\n"
"pavgb %xmm2,%xmm0\n"
"pavgb %xmm5,%xmm3\n"
"pavgb %xmm3,%xmm1\n"
"movdqa %xmm0,%xmm2\n"
"psrlw $0x8,%xmm0\n"
"movdqa %xmm1,%xmm3\n"
"psrlw $0x8,%xmm1\n"
"pand %xmm7,%xmm2\n"
"pand %xmm7,%xmm3\n"
"pavgw %xmm2,%xmm0\n"
"pavgw %xmm3,%xmm1\n"
"packuswb %xmm1,%xmm0\n"
"movdqa %xmm0,%xmm2\n"
"psrlw $0x8,%xmm0\n"
"pand %xmm7,%xmm2\n"
"pavgw %xmm2,%xmm0\n"
"packuswb %xmm0,%xmm0\n"
"movq %xmm0,(%edi)\n"
"lea 0x8(%edi),%edi\n"
"sub $0x8,%ecx\n"
"ja 1b\n"
"popa\n"
"ret\n"
);
#define HAS_SCALEROWDOWN8_SSE2
extern "C" void ScaleRowDown8_SSE2(const uint8* iptr, int32 istride,
uint8* orow, int32 owidth);
asm(
".text\n"
#if defined(OSX)
".globl _ScaleRowDown8_SSE2\n"
"_ScaleRowDown8_SSE2:\n"
#else
".global ScaleRowDown8_SSE2\n"
"ScaleRowDown8_SSE2:\n"
#endif
"pusha\n"
"mov 0x24(%esp),%esi\n"
"mov 0x2c(%esp),%edi\n"
"mov 0x30(%esp),%ecx\n"
"pcmpeqb %xmm7,%xmm7\n"
"psrlq $0x38,%xmm7\n"
"1:"
"movdqa (%esi),%xmm0\n"
"movdqa 0x10(%esi),%xmm1\n"
"lea 0x20(%esi),%esi\n"
"pand %xmm7,%xmm0\n"
"pand %xmm7,%xmm1\n"
"packuswb %xmm1,%xmm0\n"
"packuswb %xmm0,%xmm0\n"
"packuswb %xmm0,%xmm0\n"
"movd %xmm0,(%edi)\n"
"lea 0x4(%edi),%edi\n"
"sub $0x4,%ecx\n"
"ja 1b\n"
"popa\n"
"ret\n"
);
extern "C" void ScaleRowDown8Int_SSE2(const uint8* iptr, int32 istride,
uint8* orow, int32 owidth);
asm(
".text\n"
#if defined(OSX)
".globl _ScaleRowDown8Int_SSE2\n"
"_ScaleRowDown8Int_SSE2:\n"
#else
".global ScaleRowDown8Int_SSE2\n"
"ScaleRowDown8Int_SSE2:\n"
#endif
"pusha\n"
"mov 0x24(%esp),%esi\n"
"mov 0x28(%esp),%ebx\n"
"mov 0x2c(%esp),%edi\n"
"mov 0x30(%esp),%ecx\n"
"lea (%ebx,%ebx,2),%edx\n"
"pxor %xmm7,%xmm7\n"
"1:"
"movdqa (%esi),%xmm0\n"
"movdqa 0x10(%esi),%xmm1\n"
"movdqa (%esi,%ebx,1),%xmm2\n"
"movdqa 0x10(%esi,%ebx,1),%xmm3\n"
"pavgb %xmm2,%xmm0\n"
"pavgb %xmm3,%xmm1\n"
"movdqa (%esi,%ebx,2),%xmm2\n"
"movdqa 0x10(%esi,%ebx,2),%xmm3\n"
"movdqa (%esi,%edx,1),%xmm4\n"
"movdqa 0x10(%esi,%edx,1),%xmm5\n"
"lea (%esi,%ebx,4),%ebp\n"
"lea 0x20(%esi),%esi\n"
"pavgb %xmm4,%xmm2\n"
"pavgb %xmm5,%xmm3\n"
"pavgb %xmm2,%xmm0\n"
"pavgb %xmm3,%xmm1\n"
"movdqa 0x0(%ebp),%xmm2\n"
"movdqa 0x10(%ebp),%xmm3\n"
"movdqa 0x0(%ebp,%ebx,1),%xmm4\n"
"movdqa 0x10(%ebp,%ebx,1),%xmm5\n"
"pavgb %xmm4,%xmm2\n"
"pavgb %xmm5,%xmm3\n"
"movdqa 0x0(%ebp,%ebx,2),%xmm4\n"
"movdqa 0x10(%ebp,%ebx,2),%xmm5\n"
"movdqa 0x0(%ebp,%edx,1),%xmm6\n"
"pavgb %xmm6,%xmm4\n"
"movdqa 0x10(%ebp,%edx,1),%xmm6\n"
"pavgb %xmm6,%xmm5\n"
"pavgb %xmm4,%xmm2\n"
"pavgb %xmm5,%xmm3\n"
"pavgb %xmm2,%xmm0\n"
"pavgb %xmm3,%xmm1\n"
"psadbw %xmm7,%xmm0\n"
"psadbw %xmm7,%xmm1\n"
"pshufd $0xd8,%xmm0,%xmm0\n"
"pshufd $0x8d,%xmm1,%xmm1\n"
"por %xmm1,%xmm0\n"
"psrlw $0x3,%xmm0\n"
"packuswb %xmm0,%xmm0\n"
"packuswb %xmm0,%xmm0\n"
"movd %xmm0,(%edi)\n"
"lea 0x4(%edi),%edi\n"
"sub $0x4,%ecx\n"
"ja 1b\n"
"popa\n"
"ret\n"
);
// fpic is used for magiccam plugin
#if !defined(__PIC__)
#define HAS_SCALEROWDOWN34_SSSE3
extern "C" void ScaleRowDown34_SSSE3(const uint8* iptr, int32 istride,
uint8* orow, int32 owidth);
asm(
".text\n"
#if defined(OSX)
".globl _ScaleRowDown34_SSSE3\n"
"_ScaleRowDown34_SSSE3:\n"
#else
".global ScaleRowDown34_SSSE3\n"
"ScaleRowDown34_SSSE3:\n"
#endif
"pusha\n"
"mov 0x24(%esp),%esi\n"
"mov 0x2c(%esp),%edi\n"
"mov 0x30(%esp),%ecx\n"
"movdqa _shuf0,%xmm3\n"
"movdqa _shuf1,%xmm4\n"
"movdqa _shuf2,%xmm5\n"
"1:"
"movdqa (%esi),%xmm0\n"
"movdqa 0x10(%esi),%xmm2\n"
"lea 0x20(%esi),%esi\n"
"movdqa %xmm2,%xmm1\n"
"palignr $0x8,%xmm0,%xmm1\n"
"pshufb %xmm3,%xmm0\n"
"pshufb %xmm4,%xmm1\n"
"pshufb %xmm5,%xmm2\n"
"movq %xmm0,(%edi)\n"
"movq %xmm1,0x8(%edi)\n"
"movq %xmm2,0x10(%edi)\n"
"lea 0x18(%edi),%edi\n"
"sub $0x18,%ecx\n"
"ja 1b\n"
"popa\n"
"ret\n"
);
extern "C" void ScaleRowDown34_1_Int_SSSE3(const uint8* iptr, int32 istride,
uint8* orow, int32 owidth);
asm(
".text\n"
#if defined(OSX)
".globl _ScaleRowDown34_1_Int_SSSE3\n"
"_ScaleRowDown34_1_Int_SSSE3:\n"
#else
".global ScaleRowDown34_1_Int_SSSE3\n"
"ScaleRowDown34_1_Int_SSSE3:\n"
#endif
"pusha\n"
"mov 0x24(%esp),%esi\n"
"mov 0x28(%esp),%ebp\n"
"mov 0x2c(%esp),%edi\n"
"mov 0x30(%esp),%ecx\n"
"movdqa _shuf01,%xmm2\n"
"movdqa _shuf11,%xmm3\n"
"movdqa _shuf21,%xmm4\n"
"movdqa _madd01,%xmm5\n"
"movdqa _madd11,%xmm6\n"
"movdqa _round34,%xmm7\n"
"1:"
"movdqa (%esi),%xmm0\n"
"movdqa (%esi,%ebp),%xmm1\n"
"pavgb %xmm1,%xmm0\n"
"pshufb %xmm2,%xmm0\n"
"pmaddubsw %xmm5,%xmm0\n"
"paddsw %xmm7,%xmm0\n"
"psrlw $0x2,%xmm0\n"
"packuswb %xmm0,%xmm0\n"
"movq %xmm0,(%edi)\n"
"movdqu 0x8(%esi),%xmm0\n"
"movdqu 0x8(%esi,%ebp),%xmm1\n"
"pavgb %xmm1,%xmm0\n"
"pshufb %xmm3,%xmm0\n"
"pmaddubsw %xmm6,%xmm0\n"
"paddsw %xmm7,%xmm0\n"
"psrlw $0x2,%xmm0\n"
"packuswb %xmm0,%xmm0\n"
"movq %xmm0,0x8(%edi)\n"
"movdqa 0x10(%esi),%xmm0\n"
"movdqa 0x10(%esi,%ebp),%xmm1\n"
"lea 0x20(%esi),%esi\n"
"pavgb %xmm1,%xmm0\n"
"pshufb %xmm4,%xmm0\n"
"movdqa _madd21,%xmm1\n"
"pmaddubsw %xmm1,%xmm0\n"
"paddsw %xmm7,%xmm0\n"
"psrlw $0x2,%xmm0\n"
"packuswb %xmm0,%xmm0\n"
"movq %xmm0,0x10(%edi)\n"
"lea 0x18(%edi),%edi\n"
"sub $0x18,%ecx\n"
"ja 1b\n"
"popa\n"
"ret\n"
);
extern "C" void ScaleRowDown34_0_Int_SSSE3(const uint8* iptr, int32 istride,
uint8* orow, int32 owidth);
asm(
".text\n"
#if defined(OSX)
".globl _ScaleRowDown34_0_Int_SSSE3\n"
"_ScaleRowDown34_0_Int_SSSE3:\n"
#else
".global ScaleRowDown34_0_Int_SSSE3\n"
"ScaleRowDown34_0_Int_SSSE3:\n"
#endif
"pusha\n"
"mov 0x24(%esp),%esi\n"
"mov 0x28(%esp),%ebp\n"
"mov 0x2c(%esp),%edi\n"
"mov 0x30(%esp),%ecx\n"
"movdqa _shuf01,%xmm2\n"
"movdqa _shuf11,%xmm3\n"
"movdqa _shuf21,%xmm4\n"
"movdqa _madd01,%xmm5\n"
"movdqa _madd11,%xmm6\n"
"movdqa _round34,%xmm7\n"
"1:"
"movdqa (%esi),%xmm0\n"
"movdqa (%esi,%ebp,1),%xmm1\n"
"pavgb %xmm0,%xmm1\n"
"pavgb %xmm1,%xmm0\n"
"pshufb %xmm2,%xmm0\n"
"pmaddubsw %xmm5,%xmm0\n"
"paddsw %xmm7,%xmm0\n"
"psrlw $0x2,%xmm0\n"
"packuswb %xmm0,%xmm0\n"
"movq %xmm0,(%edi)\n"
"movdqu 0x8(%esi),%xmm0\n"
"movdqu 0x8(%esi,%ebp,1),%xmm1\n"
"pavgb %xmm0,%xmm1\n"
"pavgb %xmm1,%xmm0\n"
"pshufb %xmm3,%xmm0\n"
"pmaddubsw %xmm6,%xmm0\n"
"paddsw %xmm7,%xmm0\n"
"psrlw $0x2,%xmm0\n"
"packuswb %xmm0,%xmm0\n"
"movq %xmm0,0x8(%edi)\n"
"movdqa 0x10(%esi),%xmm0\n"
"movdqa 0x10(%esi,%ebp,1),%xmm1\n"
"lea 0x20(%esi),%esi\n"
"pavgb %xmm0,%xmm1\n"
"pavgb %xmm1,%xmm0\n"
"pshufb %xmm4,%xmm0\n"
"movdqa _madd21,%xmm1\n"
"pmaddubsw %xmm1,%xmm0\n"
"paddsw %xmm7,%xmm0\n"
"psrlw $0x2,%xmm0\n"
"packuswb %xmm0,%xmm0\n"
"movq %xmm0,0x10(%edi)\n"
"lea 0x18(%edi),%edi\n"
"sub $0x18,%ecx\n"
"ja 1b\n"
"popa\n"
"ret\n"
);
#define HAS_SCALEROWDOWN38_SSSE3
extern "C" void ScaleRowDown38_SSSE3(const uint8* iptr, int32 istride,
uint8* optr, int32 owidth);
asm(
".text\n"
#if defined(OSX)
".globl _ScaleRowDown38_SSSE3\n"
"_ScaleRowDown38_SSSE3:\n"
#else
".global ScaleRowDown38_SSSE3\n"
"ScaleRowDown38_SSSE3:\n"
#endif
"pusha\n"
"mov 0x24(%esp),%esi\n"
"mov 0x28(%esp),%edx\n"
"mov 0x2c(%esp),%edi\n"
"mov 0x30(%esp),%ecx\n"
"movdqa _shuf38a ,%xmm5\n"
"movdqa _shuf38b ,%xmm6\n"
"pxor %xmm7,%xmm7\n"
"1:"
"movdqa (%esi),%xmm0\n"
"movdqa 0x10(%esi),%xmm1\n"
"lea 0x20(%esi),%esi\n"
"pshufb %xmm5,%xmm0\n"
"pshufb %xmm6,%xmm1\n"
"paddusb %xmm1,%xmm0\n"
"movq %xmm0,(%edi)\n"
"movhlps %xmm0,%xmm1\n"
"movd %xmm1,0x8(%edi)\n"
"lea 0xc(%edi),%edi\n"
"sub $0xc,%ecx\n"
"ja 1b\n"
"popa\n"
"ret\n"
);
extern "C" void ScaleRowDown38_3_Int_SSSE3(const uint8* iptr, int32 istride,
uint8* optr, int32 owidth);
asm(
".text\n"
#if defined(OSX)
".globl _ScaleRowDown38_3_Int_SSSE3\n"
"_ScaleRowDown38_3_Int_SSSE3:\n"
#else
".global ScaleRowDown38_3_Int_SSSE3\n"
"ScaleRowDown38_3_Int_SSSE3:\n"
#endif
"pusha\n"
"mov 0x24(%esp),%esi\n"
"mov 0x28(%esp),%edx\n"
"mov 0x2c(%esp),%edi\n"
"mov 0x30(%esp),%ecx\n"
"movdqa _shufac0,%xmm4\n"
"movdqa _shufac3,%xmm5\n"
"movdqa _scaleac3,%xmm6\n"
"pxor %xmm7,%xmm7\n"
"1:"
"movdqa (%esi),%xmm0\n"
"movdqa (%esi,%edx,1),%xmm2\n"
"movhlps %xmm0,%xmm1\n"
"movhlps %xmm2,%xmm3\n"
"punpcklbw %xmm7,%xmm0\n"
"punpcklbw %xmm7,%xmm1\n"
"punpcklbw %xmm7,%xmm2\n"
"punpcklbw %xmm7,%xmm3\n"
"paddusw %xmm2,%xmm0\n"
"paddusw %xmm3,%xmm1\n"
"movdqa (%esi,%edx,2),%xmm2\n"
"lea 0x10(%esi),%esi\n"
"movhlps %xmm2,%xmm3\n"
"punpcklbw %xmm7,%xmm2\n"
"punpcklbw %xmm7,%xmm3\n"
"paddusw %xmm2,%xmm0\n"
"paddusw %xmm3,%xmm1\n"
"movdqa %xmm0,%xmm2\n"
"psrldq $0x2,%xmm0\n"
"paddusw %xmm0,%xmm2\n"
"psrldq $0x2,%xmm0\n"
"paddusw %xmm0,%xmm2\n"
"pshufb %xmm4,%xmm2\n"
"movdqa %xmm1,%xmm3\n"
"psrldq $0x2,%xmm1\n"
"paddusw %xmm1,%xmm3\n"
"psrldq $0x2,%xmm1\n"
"paddusw %xmm1,%xmm3\n"
"pshufb %xmm5,%xmm3\n"
"paddusw %xmm3,%xmm2\n"
"pmulhuw %xmm6,%xmm2\n"
"packuswb %xmm2,%xmm2\n"
"movd %xmm2,(%edi)\n"
"pextrw $0x2,%xmm2,%eax\n"
"mov %ax,0x4(%edi)\n"
"lea 0x6(%edi),%edi\n"
"sub $0x6,%ecx\n"
"ja 1b\n"
"popa\n"
"ret\n"
);
extern "C" void ScaleRowDown38_2_Int_SSSE3(const uint8* iptr, int32 istride,
uint8* optr, int32 owidth);
asm(
".text\n"
#if defined(OSX)
".globl _ScaleRowDown38_2_Int_SSSE3\n"
"_ScaleRowDown38_2_Int_SSSE3:\n"
#else
".global ScaleRowDown38_2_Int_SSSE3\n"
"ScaleRowDown38_2_Int_SSSE3:\n"
#endif
"pusha\n"
"mov 0x24(%esp),%esi\n"
"mov 0x28(%esp),%edx\n"
"mov 0x2c(%esp),%edi\n"
"mov 0x30(%esp),%ecx\n"
"movdqa _shufab0,%xmm4\n"
"movdqa _shufab1,%xmm5\n"
"movdqa _shufab2,%xmm6\n"
"movdqa _scaleab2,%xmm7\n"
"1:"
"movdqa (%esi),%xmm2\n"
"pavgb (%esi,%edx,1),%xmm2\n"
"lea 0x10(%esi),%esi\n"
"movdqa %xmm2,%xmm0\n"
"pshufb %xmm4,%xmm0\n"
"movdqa %xmm2,%xmm1\n"
"pshufb %xmm5,%xmm1\n"
"paddusw %xmm1,%xmm0\n"
"pshufb %xmm6,%xmm2\n"
"paddusw %xmm2,%xmm0\n"
"pmulhuw %xmm7,%xmm0\n"
"packuswb %xmm0,%xmm0\n"
"movd %xmm0,(%edi)\n"
"pextrw $0x2,%xmm0,%eax\n"
"mov %ax,0x4(%edi)\n"
"lea 0x6(%edi),%edi\n"
"sub $0x6,%ecx\n"
"ja 1b\n"
"popa\n"
"ret\n"
);
#endif // __PIC__
#define HAS_SCALEADDROWS_SSE2
extern "C" void ScaleAddRows_SSE2(const uint8* iptr, int32 istride,
uint16* orow, int32 iwidth, int32 iheight);
asm(
".text\n"
#if defined(OSX)
".globl _ScaleAddRows_SSE2\n"
"_ScaleAddRows_SSE2:\n"
#else
".global ScaleAddRows_SSE2\n"
"ScaleAddRows_SSE2:\n"
#endif
"pusha\n"
"mov 0x24(%esp),%esi\n"
"mov 0x28(%esp),%edx\n"
"mov 0x2c(%esp),%edi\n"
"mov 0x30(%esp),%ecx\n"
"mov 0x34(%esp),%ebx\n"
"pxor %xmm7,%xmm7\n"
"1:"
"movdqa (%esi),%xmm2\n"
"lea (%esi,%edx,1),%eax\n"
"movhlps %xmm2,%xmm3\n"
"lea -0x1(%ebx),%ebp\n"
"punpcklbw %xmm7,%xmm2\n"
"punpcklbw %xmm7,%xmm3\n"
"2:"
"movdqa (%eax),%xmm0\n"
"lea (%eax,%edx,1),%eax\n"
"movhlps %xmm0,%xmm1\n"
"punpcklbw %xmm7,%xmm0\n"
"punpcklbw %xmm7,%xmm1\n"
"paddusw %xmm0,%xmm2\n"
"paddusw %xmm1,%xmm3\n"
"sub $0x1,%ebp\n"
"ja 2b\n"
"movdqa %xmm2,(%edi)\n"
"movdqa %xmm3,0x10(%edi)\n"
"lea 0x20(%edi),%edi\n"
"lea 0x10(%esi),%esi\n"
"sub $0x10,%ecx\n"
"ja 1b\n"
"popa\n"
"ret\n"
);
// Bilinear row filtering combines 16x2 -> 16x1. SSE2 version
#define HAS_SCALEFILTERROWS_SSE2
extern "C" void ScaleFilterRows_SSE2(uint8* optr,
const uint8* iptr0, int32 istride,
int owidth, int source_y_fraction);
asm(
".text\n"
#if defined(OSX)
".globl _ScaleFilterRows_SSE2\n"
"_ScaleFilterRows_SSE2:\n"
#else
".global ScaleFilterRows_SSE2\n"
"ScaleFilterRows_SSE2:\n"
#endif
"push %esi\n"
"push %edi\n"
"mov 0xc(%esp),%edi\n"
"mov 0x10(%esp),%esi\n"
"mov 0x14(%esp),%edx\n"
"mov 0x18(%esp),%ecx\n"
"mov 0x1c(%esp),%eax\n"
"cmp $0x0,%eax\n"
"je 2f\n"
"cmp $0x80,%eax\n"
"je 3f\n"
"movd %eax,%xmm6\n"
"punpcklwd %xmm6,%xmm6\n"
"pshufd $0x0,%xmm6,%xmm6\n"
"neg %eax\n"
"add $0x100,%eax\n"
"movd %eax,%xmm5\n"
"punpcklwd %xmm5,%xmm5\n"
"pshufd $0x0,%xmm5,%xmm5\n"
"pxor %xmm7,%xmm7\n"
"1:"
"movdqa (%esi),%xmm0\n"
"movdqa (%esi,%edx,1),%xmm2\n"
"lea 0x10(%esi),%esi\n"
"movdqa %xmm0,%xmm1\n"
"movdqa %xmm2,%xmm3\n"
"punpcklbw %xmm7,%xmm0\n"
"punpcklbw %xmm7,%xmm2\n"
"punpckhbw %xmm7,%xmm1\n"
"punpckhbw %xmm7,%xmm3\n"
"pmullw %xmm5,%xmm0\n"
"pmullw %xmm5,%xmm1\n"
"pmullw %xmm6,%xmm2\n"
"pmullw %xmm6,%xmm3\n"
"paddusw %xmm2,%xmm0\n"
"paddusw %xmm3,%xmm1\n"
"psrlw $0x8,%xmm0\n"
"psrlw $0x8,%xmm1\n"
"packuswb %xmm1,%xmm0\n"
"movdqa %xmm0,(%edi)\n"
"lea 0x10(%edi),%edi\n"
"sub $0x10,%ecx\n"
"ja 1b\n"
"mov -0x1(%edi),%al\n"
"mov %al,(%edi)\n"
"pop %edi\n"
"pop %esi\n"
"ret\n"
"2:"
"movdqa (%esi),%xmm0\n"
"lea 0x10(%esi),%esi\n"
"movdqa %xmm0,(%edi)\n"
"lea 0x10(%edi),%edi\n"
"sub $0x10,%ecx\n"
"ja 2b\n"
"mov -0x1(%edi),%al\n"
"mov %al,(%edi)\n"
"pop %edi\n"
"pop %esi\n"
"ret\n"
"3:"
"movdqa (%esi),%xmm0\n"
"movdqa (%esi,%edx,1),%xmm2\n"
"lea 0x10(%esi),%esi\n"
"pavgb %xmm2,%xmm0\n"
"movdqa %xmm0,(%edi)\n"
"lea 0x10(%edi),%edi\n"
"sub $0x10,%ecx\n"
"ja 3b\n"
"mov -0x1(%edi),%al\n"
"mov %al,(%edi)\n"
"pop %edi\n"
"pop %esi\n"
"ret\n"
);
// Bilinear row filtering combines 16x2 -> 16x1. SSSE3 version
#define HAS_SCALEFILTERROWS_SSSE3
extern "C" void ScaleFilterRows_SSSE3(uint8* optr,
const uint8* iptr0, int32 istride,
int owidth, int source_y_fraction);
asm(
".text\n"
#if defined(OSX)
".globl _ScaleFilterRows_SSSE3\n"
"_ScaleFilterRows_SSSE3:\n"
#else
".global ScaleFilterRows_SSSE3\n"
"ScaleFilterRows_SSSE3:\n"
#endif
"push %esi\n"
"push %edi\n"
"mov 0xc(%esp),%edi\n"
"mov 0x10(%esp),%esi\n"
"mov 0x14(%esp),%edx\n"
"mov 0x18(%esp),%ecx\n"
"mov 0x1c(%esp),%eax\n"
"cmp $0x0,%eax\n"
"je 2f\n"
"cmp $0x80,%eax\n"
"je 3f\n"
"shr %eax\n"
"mov %al,%ah\n"
"neg %al\n"
"add $0x80,%al\n"
"movd %eax,%xmm7\n"
"punpcklwd %xmm7,%xmm7\n"
"pshufd $0x0,%xmm7,%xmm7\n"
"1:"
"movdqa (%esi),%xmm0\n"
"movdqa (%esi,%edx,1),%xmm2\n"
"lea 0x10(%esi),%esi\n"
"movdqa %xmm0,%xmm1\n"
"punpcklbw %xmm2,%xmm0\n"
"punpckhbw %xmm2,%xmm1\n"
"pmaddubsw %xmm7,%xmm0\n"
"pmaddubsw %xmm7,%xmm1\n"
"psrlw $0x7,%xmm0\n"
"psrlw $0x7,%xmm1\n"
"packuswb %xmm1,%xmm0\n"
"movdqa %xmm0,(%edi)\n"
"lea 0x10(%edi),%edi\n"
"sub $0x10,%ecx\n"
"ja 1b\n"
"mov -0x1(%edi),%al\n"
"mov %al,(%edi)\n"
"pop %edi\n"
"pop %esi\n"
"ret\n"
"2:"
"movdqa (%esi),%xmm0\n"
"lea 0x10(%esi),%esi\n"
"movdqa %xmm0,(%edi)\n"
"lea 0x10(%edi),%edi\n"
"sub $0x10,%ecx\n"
"ja 2b\n"
"mov -0x1(%edi),%al\n"
"mov %al,(%edi)\n"
"pop %edi\n"
"pop %esi\n"
"ret\n"
"3:"
"movdqa (%esi),%xmm0\n"
"movdqa (%esi,%edx,1),%xmm2\n"
"lea 0x10(%esi),%esi\n"
"pavgb %xmm2,%xmm0\n"
"movdqa %xmm0,(%edi)\n"
"lea 0x10(%edi),%edi\n"
"sub $0x10,%ecx\n"
"ja 3b\n"
"mov -0x1(%edi),%al\n"
"mov %al,(%edi)\n"
"pop %edi\n"
"pop %esi\n"
"ret\n"
);
#endif
// CPU agnostic row functions
static void ScaleRowDown2_C(const uint8* iptr, int32,
uint8* dst, int32 owidth) {
for (int x = 0; x < owidth; ++x) {
*dst++ = *iptr;
iptr += 2;
}
}
static void ScaleRowDown2Int_C(const uint8* iptr, int32 istride,
uint8* dst, int32 owidth) {
for (int x = 0; x < owidth; ++x) {
*dst++ = (iptr[0] + iptr[1] +
iptr[istride] + iptr[istride + 1] + 2) >> 2;
iptr += 2;
}
}
static void ScaleRowDown4_C(const uint8* iptr, int32,
uint8* dst, int32 owidth) {
for (int x = 0; x < owidth; ++x) {
*dst++ = *iptr;
iptr += 4;
}
}
static void ScaleRowDown4Int_C(const uint8* iptr, int32 istride,
uint8* dst, int32 owidth) {
for (int x = 0; x < owidth; ++x) {
*dst++ = (iptr[0] + iptr[1] + iptr[2] + iptr[3] +
iptr[istride + 0] + iptr[istride + 1] +
iptr[istride + 2] + iptr[istride + 3] +
iptr[istride * 2 + 0] + iptr[istride * 2 + 1] +
iptr[istride * 2 + 2] + iptr[istride * 2 + 3] +
iptr[istride * 3 + 0] + iptr[istride * 3 + 1] +
iptr[istride * 3 + 2] + iptr[istride * 3 + 3] + 8) >> 4;
iptr += 4;
}
}
// 640 output pixels is enough to allow 5120 input pixels with 1/8 scale down.
// Keeping the total buffer under 4096 bytes avoids a stackcheck, saving 4% cpu.
static const int kMaxOutputWidth = 640;
static const int kMaxRow12 = kMaxOutputWidth * 2;
static void ScaleRowDown8_C(const uint8* iptr, int32,
uint8* dst, int32 owidth) {
for (int x = 0; x < owidth; ++x) {
*dst++ = *iptr;
iptr += 8;
}
}
// Note calling code checks width is less than max and if not
// uses ScaleRowDown8_C instead.
static void ScaleRowDown8Int_C(const uint8* iptr, int32 istride,
uint8* dst, int32 owidth) {
ALIGN16(uint8 irow[kMaxRow12 * 2]);
ASSERT(owidth <= kMaxOutputWidth);
ScaleRowDown4Int_C(iptr, istride, irow, owidth * 2);
ScaleRowDown4Int_C(iptr + istride * 4, istride, irow + kMaxOutputWidth,
owidth * 2);
ScaleRowDown2Int_C(irow, kMaxOutputWidth, dst, owidth);
}
static void ScaleRowDown34_C(const uint8* iptr, int32,
uint8* dst, int32 owidth) {
ASSERT((owidth % 3 == 0) && (owidth > 0));
uint8* dend = dst + owidth;
do {
dst[0] = iptr[0];
dst[1] = iptr[1];
dst[2] = iptr[3];
dst += 3;
iptr += 4;
} while (dst < dend);
}
// Filter rows 0 and 1 together, 3 : 1
static void ScaleRowDown34_0_Int_C(const uint8* iptr, int32 istride,
uint8* d, int32 owidth) {
ASSERT((owidth % 3 == 0) && (owidth > 0));
uint8* dend = d + owidth;
const uint8* s = iptr;
const uint8* t = iptr + istride;
do {
uint8 a0 = (s[0] * 3 + s[1] * 1 + 2) >> 2;
uint8 a1 = (s[1] * 1 + s[2] * 1 + 1) >> 1;
uint8 a2 = (s[2] * 1 + s[3] * 3 + 2) >> 2;
uint8 b0 = (t[0] * 3 + t[1] * 1 + 2) >> 2;
uint8 b1 = (t[1] * 1 + t[2] * 1 + 1) >> 1;
uint8 b2 = (t[2] * 1 + t[3] * 3 + 2) >> 2;
d[0] = (a0 * 3 + b0 + 2) >> 2;
d[1] = (a1 * 3 + b1 + 2) >> 2;
d[2] = (a2 * 3 + b2 + 2) >> 2;
d += 3;
s += 4;
t += 4;
} while (d < dend);
}
// Filter rows 1 and 2 together, 1 : 1
static void ScaleRowDown34_1_Int_C(const uint8* iptr, int32 istride,
uint8* d, int32 owidth) {
ASSERT((owidth % 3 == 0) && (owidth > 0));
uint8* dend = d + owidth;
const uint8* s = iptr;
const uint8* t = iptr + istride;
do {
uint8 a0 = (s[0] * 3 + s[1] * 1 + 2) >> 2;
uint8 a1 = (s[1] * 1 + s[2] * 1 + 1) >> 1;
uint8 a2 = (s[2] * 1 + s[3] * 3 + 2) >> 2;
uint8 b0 = (t[0] * 3 + t[1] * 1 + 2) >> 2;
uint8 b1 = (t[1] * 1 + t[2] * 1 + 1) >> 1;
uint8 b2 = (t[2] * 1 + t[3] * 3 + 2) >> 2;
d[0] = (a0 + b0 + 1) >> 1;
d[1] = (a1 + b1 + 1) >> 1;
d[2] = (a2 + b2 + 1) >> 1;
d += 3;
s += 4;
t += 4;
} while (d < dend);
}
#if defined(HAS_SCALEFILTERROWS_SSE2)
// Filter row to 3/4
static void ScaleFilterCols34_C(uint8* optr, const uint8* iptr, int owidth) {
ASSERT((owidth % 3 == 0) && (owidth > 0));
uint8* dend = optr + owidth;
const uint8* s = iptr;
do {
optr[0] = (s[0] * 3 + s[1] * 1 + 2) >> 2;
optr[1] = (s[1] * 1 + s[2] * 1 + 1) >> 1;
optr[2] = (s[2] * 1 + s[3] * 3 + 2) >> 2;
optr += 3;
s += 4;
} while (optr < dend);
}
#endif
static void ScaleFilterCols_C(uint8* optr, const uint8* iptr,
int owidth, int dx) {
int x = 0;
for (int j = 0; j < owidth; ++j) {
int xi = x >> 16;
int xf1 = x & 0xffff;
int xf0 = 65536 - xf1;
*optr++ = (iptr[xi] * xf0 + iptr[xi + 1] * xf1) >> 16;
x += dx;
}
}
#ifdef TEST_RSTSC
uint64 timers34[4] = { 0, };
#endif
static const int kMaxInputWidth = 2560;
#if defined(HAS_SCALEFILTERROWS_SSE2)
#define HAS_SCALEROWDOWN34_SSE2
// Filter rows 0 and 1 together, 3 : 1
static void ScaleRowDown34_0_Int_SSE2(const uint8* iptr, int32 istride,
uint8* d, int32 owidth) {
ASSERT((owidth % 3 == 0) && (owidth > 0));
ALIGN16(uint8 row[kMaxInputWidth]);
#ifdef TEST_RSTSC
uint64 t1 = __rdtsc();
#endif
ScaleFilterRows_SSE2(row, iptr, istride, owidth * 4 / 3, 256 / 4);
#ifdef TEST_RSTSC
uint64 t2 = __rdtsc();
#endif
ScaleFilterCols34_C(d, row, owidth);
#ifdef TEST_RSTSC
uint64 t3 = __rdtsc();
timers34[0] += t2 - t1;
timers34[1] += t3 - t2;
#endif
}
// Filter rows 1 and 2 together, 1 : 1
static void ScaleRowDown34_1_Int_SSE2(const uint8* iptr, int32 istride,
uint8* d, int32 owidth) {
ASSERT((owidth % 3 == 0) && (owidth > 0));
ALIGN16(uint8 row[kMaxInputWidth]);
#ifdef TEST_RSTSC
uint64 t1 = __rdtsc();
#endif
ScaleFilterRows_SSE2(row, iptr, istride, owidth * 4 / 3, 256 / 2);
#ifdef TEST_RSTSC
uint64 t2 = __rdtsc();
#endif
ScaleFilterCols34_C(d, row, owidth);
#ifdef TEST_RSTSC
uint64 t3 = __rdtsc();
timers34[2] += t2 - t1;
timers34[3] += t3 - t2;
#endif
}
#endif
static void ScaleRowDown38_C(const uint8* iptr, int32,
uint8* dst, int32 owidth) {
ASSERT(owidth % 3 == 0);
for (int x = 0; x < owidth; x += 3) {
dst[0] = iptr[0];
dst[1] = iptr[3];
dst[2] = iptr[6];
dst += 3;
iptr += 8;
}
}
// 8x3 -> 3x1
static void ScaleRowDown38_3_Int_C(const uint8* iptr, int32 istride,
uint8* optr, int32 owidth) {
ASSERT((owidth % 3 == 0) && (owidth > 0));
for (int i = 0; i < owidth; i+=3) {
optr[0] = (iptr[0] + iptr[1] + iptr[2] +
iptr[istride + 0] + iptr[istride + 1] + iptr[istride + 2] +
iptr[istride * 2 + 0] + iptr[istride * 2 + 1] + iptr[istride * 2 + 2]) *
(65536 / 9) >> 16;
optr[1] = (iptr[3] + iptr[4] + iptr[5] +
iptr[istride + 3] + iptr[istride + 4] + iptr[istride + 5] +
iptr[istride * 2 + 3] + iptr[istride * 2 + 4] + iptr[istride * 2 + 5]) *
(65536 / 9) >> 16;
optr[2] = (iptr[6] + iptr[7] +
iptr[istride + 6] + iptr[istride + 7] +
iptr[istride * 2 + 6] + iptr[istride * 2 + 7]) *
(65536 / 6) >> 16;
iptr += 8;
optr += 3;
}
}
// 8x2 -> 3x1
static void ScaleRowDown38_2_Int_C(const uint8* iptr, int32 istride,
uint8* optr, int32 owidth) {
ASSERT((owidth % 3 == 0) && (owidth > 0));
for (int i = 0; i < owidth; i+=3) {
optr[0] = (iptr[0] + iptr[1] + iptr[2] +
iptr[istride + 0] + iptr[istride + 1] + iptr[istride + 2]) *
(65536 / 6) >> 16;
optr[1] = (iptr[3] + iptr[4] + iptr[5] +
iptr[istride + 3] + iptr[istride + 4] + iptr[istride + 5]) *
(65536 / 6) >> 16;
optr[2] = (iptr[6] + iptr[7] +
iptr[istride + 6] + iptr[istride + 7]) *
(65536 / 4) >> 16;
iptr += 8;
optr += 3;
}
}
// C version 8x2 -> 8x1
static void ScaleFilterRows_C(uint8* optr,
const uint8* iptr0, int32 istride,
int owidth, int source_y_fraction) {
ASSERT(owidth > 0);
int y1_fraction = source_y_fraction;
int y0_fraction = 256 - y1_fraction;
const uint8* iptr1 = iptr0 + istride;
uint8* end = optr + owidth;
do {
optr[0] = (iptr0[0] * y0_fraction + iptr1[0] * y1_fraction) >> 8;
optr[1] = (iptr0[1] * y0_fraction + iptr1[1] * y1_fraction) >> 8;
optr[2] = (iptr0[2] * y0_fraction + iptr1[2] * y1_fraction) >> 8;
optr[3] = (iptr0[3] * y0_fraction + iptr1[3] * y1_fraction) >> 8;
optr[4] = (iptr0[4] * y0_fraction + iptr1[4] * y1_fraction) >> 8;
optr[5] = (iptr0[5] * y0_fraction + iptr1[5] * y1_fraction) >> 8;
optr[6] = (iptr0[6] * y0_fraction + iptr1[6] * y1_fraction) >> 8;
optr[7] = (iptr0[7] * y0_fraction + iptr1[7] * y1_fraction) >> 8;
iptr0 += 8;
iptr1 += 8;
optr += 8;
} while (optr < end);
optr[0] = optr[-1];
}
void ScaleAddRows_C(const uint8* iptr, int32 istride,
uint16* orow, int32 iwidth, int32 iheight) {
ASSERT(iwidth > 0);
ASSERT(iheight > 0);
for (int x = 0; x < iwidth; ++x) {
const uint8* s = iptr + x;
int sum = 0;
for (int y = 0; y < iheight; ++y) {
sum += s[0];
s += istride;
}
orow[x] = sum;
}
}
/**
* Scale plane, 1/2
*
* This is an optimized version for scaling down a plane to 1/2 of
* its original size.
*
*/
static void ScalePlaneDown2(int32 iwidth, int32 iheight,
int32 owidth, int32 oheight,
int32 istride, int32 ostride,
const uint8 *iptr, uint8 *optr,
bool interpolate) {
ASSERT(iwidth % 2 == 0);
ASSERT(iheight % 2 == 0);
void (*ScaleRowDown2)(const uint8* iptr, int32 istride,
uint8* orow, int32 owidth);
#if defined(HAS_SCALEROWDOWN2_NEON)
if (libyuv::CpuInfo::TestCpuFlag(libyuv::CpuInfo::kCpuHasNEON) &&
(owidth % 16 == 0) && (istride % 16 == 0) && (ostride % 16 == 0) &&
IS_ALIGNED(iptr, 16) && IS_ALIGNED(optr, 16)) {
ScaleRowDown2 = interpolate ? ScaleRowDown2Int_NEON : ScaleRowDown2_NEON;
} else
#endif
#if defined(HAS_SCALEROWDOWN2_SSE2)
if (libyuv::CpuInfo::TestCpuFlag(libyuv::CpuInfo::kCpuHasSSE2) &&
(owidth % 16 == 0) && IS_ALIGNED(iptr, 16) && IS_ALIGNED(optr, 16)) {
ScaleRowDown2 = interpolate ? ScaleRowDown2Int_SSE2 : ScaleRowDown2_SSE2;
} else
#endif
{
ScaleRowDown2 = interpolate ? ScaleRowDown2Int_C : ScaleRowDown2_C;
}
for (int y = 0; y < oheight; ++y) {
ScaleRowDown2(iptr, istride, optr, owidth);
iptr += (istride << 1);
optr += ostride;
}
}
/**
* Scale plane, 1/4
*
* This is an optimized version for scaling down a plane to 1/4 of
* its original size.
*/
static void ScalePlaneDown4(int32 iwidth, int32 iheight,
int32 owidth, int32 oheight,
int32 istride, int32 ostride,
const uint8 *iptr, uint8 *optr,
bool interpolate) {
ASSERT(iwidth % 4 == 0);
ASSERT(iheight % 4 == 0);
void (*ScaleRowDown4)(const uint8* iptr, int32 istride,
uint8* orow, int32 owidth);
#if defined(HAS_SCALEROWDOWN4_SSE2)
if (libyuv::CpuInfo::TestCpuFlag(libyuv::CpuInfo::kCpuHasSSE2) &&
(owidth % 8 == 0) && (istride % 16 == 0) && (ostride % 8 == 0) &&
IS_ALIGNED(iptr, 16) && IS_ALIGNED(optr, 8)) {
ScaleRowDown4 = interpolate ? ScaleRowDown4Int_SSE2 : ScaleRowDown4_SSE2;
} else
#endif
{
ScaleRowDown4 = interpolate ? ScaleRowDown4Int_C : ScaleRowDown4_C;
}
for (int y = 0; y < oheight; ++y) {
ScaleRowDown4(iptr, istride, optr, owidth);
iptr += (istride << 2);
optr += ostride;
}
}
/**
* Scale plane, 1/8
*
* This is an optimized version for scaling down a plane to 1/8
* of its original size.
*
*/
static void ScalePlaneDown8(int32 iwidth, int32 iheight,
int32 owidth, int32 oheight,
int32 istride, int32 ostride,
const uint8 *iptr, uint8 *optr,
bool interpolate) {
ASSERT(iwidth % 8 == 0);
ASSERT(iheight % 8 == 0);
void (*ScaleRowDown8)(const uint8* iptr, int32 istride,
uint8* orow, int32 owidth);
#if defined(HAS_SCALEROWDOWN8_SSE2)
if (libyuv::CpuInfo::TestCpuFlag(libyuv::CpuInfo::kCpuHasSSE2) &&
(owidth % 16 == 0) && owidth <= kMaxOutputWidth &&
(istride % 16 == 0) && (ostride % 16 == 0) &&
IS_ALIGNED(iptr, 16) && IS_ALIGNED(optr, 16)) {
ScaleRowDown8 = interpolate ? ScaleRowDown8Int_SSE2 : ScaleRowDown8_SSE2;
} else
#endif
{
ScaleRowDown8 = interpolate && (owidth <= kMaxOutputWidth) ?
ScaleRowDown8Int_C : ScaleRowDown8_C;
}
for (int y = 0; y < oheight; ++y) {
ScaleRowDown8(iptr, istride, optr, owidth);
iptr += (istride << 3);
optr += ostride;
}
}
/**
* Scale plane down, 3/4
*
* Provided by Frank Barchard (fbarchard@google.com)
*
*/
static void ScalePlaneDown34(int32 iwidth, int32 iheight,
int32 owidth, int32 oheight,
int32 istride, int32 ostride,
const uint8* iptr, uint8* optr,
bool interpolate) {
ASSERT(owidth % 3 == 0);
void (*ScaleRowDown34_0)(const uint8* iptr, int32 istride,
uint8* orow, int32 owidth);
void (*ScaleRowDown34_1)(const uint8* iptr, int32 istride,
uint8* orow, int32 owidth);
#if defined(HAS_SCALEROWDOWN34_SSSE3)
if (libyuv::CpuInfo::TestCpuFlag(libyuv::CpuInfo::kCpuHasSSSE3) &&
(owidth % 24 == 0) && (istride % 16 == 0) && (ostride % 8 == 0) &&
IS_ALIGNED(iptr, 16) && IS_ALIGNED(optr, 8)) {
if (!interpolate) {
ScaleRowDown34_0 = ScaleRowDown34_SSSE3;
ScaleRowDown34_1 = ScaleRowDown34_SSSE3;
} else {
ScaleRowDown34_0 = ScaleRowDown34_0_Int_SSSE3;
ScaleRowDown34_1 = ScaleRowDown34_1_Int_SSSE3;
}
} else
#endif
#if defined(HAS_SCALEROWDOWN34_SSE2)
if (libyuv::CpuInfo::TestCpuFlag(libyuv::CpuInfo::kCpuHasSSE2) &&
(owidth % 24 == 0) && (istride % 16 == 0) && (ostride % 8 == 0) &&
IS_ALIGNED(iptr, 16) && IS_ALIGNED(optr, 8) &&
interpolate) {
ScaleRowDown34_0 = ScaleRowDown34_0_Int_SSE2;
ScaleRowDown34_1 = ScaleRowDown34_1_Int_SSE2;
} else
#endif
{
if (!interpolate) {
ScaleRowDown34_0 = ScaleRowDown34_C;
ScaleRowDown34_1 = ScaleRowDown34_C;
} else {
ScaleRowDown34_0 = ScaleRowDown34_0_Int_C;
ScaleRowDown34_1 = ScaleRowDown34_1_Int_C;
}
}
int irow = 0;
for (int y = 0; y < oheight; ++y) {
switch (irow) {
case 0:
ScaleRowDown34_0(iptr, istride, optr, owidth);
break;
case 1:
ScaleRowDown34_1(iptr, istride, optr, owidth);
break;
case 2:
ScaleRowDown34_0(iptr + istride, -istride, optr, owidth);
break;
}
++irow;
iptr += istride;
optr += ostride;
if (irow >= 3) {
iptr += istride;
irow = 0;
}
}
#ifdef TEST_RSTSC
std::cout << "Timer34_0 Row " << std::setw(9) << timers34[0]
<< " Column " << std::setw(9) << timers34[1]
<< " Timer34_1 Row " << std::setw(9) << timers34[2]
<< " Column " << std::setw(9) << timers34[3] << std::endl;
#endif
}
/**
* Scale plane, 3/8
*
* This is an optimized version for scaling down a plane to 3/8
* of its original size.
*
* Reduces 16x3 to 6x1
*/
static void ScalePlaneDown38(int32 iwidth, int32 iheight,
int32 owidth, int32 oheight,
int32 istride, int32 ostride,
const uint8* iptr, uint8* optr,
bool interpolate) {
ASSERT(owidth % 3 == 0);
void (*ScaleRowDown38_3)(const uint8* iptr, int32 istride,
uint8* orow, int32 owidth);
void (*ScaleRowDown38_2)(const uint8* iptr, int32 istride,
uint8* orow, int32 owidth);
#if defined(HAS_SCALEROWDOWN38_SSSE3)
if (libyuv::CpuInfo::TestCpuFlag(libyuv::CpuInfo::kCpuHasSSSE3) &&
(owidth % 24 == 0) && (istride % 16 == 0) && (ostride % 8 == 0) &&
IS_ALIGNED(iptr, 16) && IS_ALIGNED(optr, 8)) {
if (!interpolate) {
ScaleRowDown38_3 = ScaleRowDown38_SSSE3;
ScaleRowDown38_2 = ScaleRowDown38_SSSE3;
} else {
ScaleRowDown38_3 = ScaleRowDown38_3_Int_SSSE3;
ScaleRowDown38_2 = ScaleRowDown38_2_Int_SSSE3;
}
} else
#endif
{
if (!interpolate) {
ScaleRowDown38_3 = ScaleRowDown38_C;
ScaleRowDown38_2 = ScaleRowDown38_C;
} else {
ScaleRowDown38_3 = ScaleRowDown38_3_Int_C;
ScaleRowDown38_2 = ScaleRowDown38_2_Int_C;
}
}
int irow = 0;
for (int y = 0; y < oheight; ++y) {
switch (irow) {
case 0:
case 1:
ScaleRowDown38_3(iptr, istride, optr, owidth);
iptr += istride * 3;
++irow;
break;
case 2:
ScaleRowDown38_2(iptr, istride, optr, owidth);
iptr += istride * 2;
irow = 0;
break;
}
optr += ostride;
}
}
inline static uint32 SumBox(int32 iboxwidth, int32 iboxheight,
int32 istride, const uint8 *iptr) {
ASSERT(iboxwidth > 0);
ASSERT(iboxheight > 0);
uint32 sum = 0u;
for (int y = 0; y < iboxheight; ++y) {
for (int x = 0; x < iboxwidth; ++x) {
sum += iptr[x];
}
iptr += istride;
}
return sum;
}
static void ScalePlaneBoxRow(int32 owidth, int32 boxheight,
int dx, int32 istride,
const uint8 *iptr, uint8 *optr) {
int x = 0;
for (int i = 0; i < owidth; ++i) {
int ix = x >> 16;
x += dx;
int boxwidth = (x >> 16) - ix;
*optr++ = SumBox(boxwidth, boxheight, istride, iptr + ix) /
(boxwidth * boxheight);
}
}
inline static uint32 SumPixels(int32 iboxwidth, const uint16 *iptr) {
ASSERT(iboxwidth > 0);
uint32 sum = 0u;
for (int x = 0; x < iboxwidth; ++x) {
sum += iptr[x];
}
return sum;
}
static void ScaleAddCols2_C(int32 owidth, int32 boxheight, int dx,
const uint16 *iptr, uint8 *optr) {
int scaletbl[2];
int minboxwidth = (dx >> 16);
scaletbl[0] = 65536 / (minboxwidth * boxheight);
scaletbl[1] = 65536 / ((minboxwidth + 1) * boxheight);
int *scaleptr = scaletbl - minboxwidth;
int x = 0;
for (int i = 0; i < owidth; ++i) {
int ix = x >> 16;
x += dx;
int boxwidth = (x >> 16) - ix;
*optr++ = SumPixels(boxwidth, iptr + ix) * scaleptr[boxwidth] >> 16;
}
}
static void ScaleAddCols1_C(int32 owidth, int32 boxheight, int dx,
const uint16 *iptr, uint8 *optr) {
int boxwidth = (dx >> 16);
int scaleval = 65536 / (boxwidth * boxheight);
int x = 0;
for (int i = 0; i < owidth; ++i) {
*optr++ = SumPixels(boxwidth, iptr + x) * scaleval >> 16;
x += boxwidth;
}
}
/**
* Scale plane down to any dimensions, with interpolation.
* (boxfilter).
*
* Same method as SimpleScale, which is fixed point, outputting
* one pixel of destination using fixed point (16.16) to step
* through source, sampling a box of pixel with simple
* averaging.
*/
static void ScalePlaneBox(int32 iwidth, int32 iheight,
int32 owidth, int32 oheight,
int32 istride, int32 ostride,
const uint8 *iptr, uint8 *optr) {
ASSERT(owidth > 0);
ASSERT(oheight > 0);
int dy = (iheight << 16) / oheight;
int dx = (iwidth << 16) / owidth;
if ((iwidth % 16 != 0) || (iwidth > kMaxInputWidth) ||
oheight * 2 > iheight) {
uint8 *dst = optr;
int dy = (iheight << 16) / oheight;
int dx = (iwidth << 16) / owidth;
int y = 0;
for (int j = 0; j < oheight; ++j) {
int iy = y >> 16;
const uint8 *const src = iptr + iy * istride;
y += dy;
if (y > (iheight << 16)) {
y = (iheight << 16);
}
int boxheight = (y >> 16) - iy;
ScalePlaneBoxRow(owidth, boxheight,
dx, istride,
src, dst);
dst += ostride;
}
} else {
ALIGN16(uint16 row[kMaxInputWidth]);
void (*ScaleAddRows)(const uint8* iptr, int32 istride,
uint16* orow, int32 iwidth, int32 iheight);
void (*ScaleAddCols)(int32 owidth, int32 boxheight, int dx,
const uint16 *iptr, uint8 *optr);
#if defined(HAS_SCALEADDROWS_SSE2)
if (libyuv::CpuInfo::TestCpuFlag(libyuv::CpuInfo::kCpuHasSSE2) &&
(istride % 16 == 0) && IS_ALIGNED(iptr, 16) && (iwidth % 16) == 0) {
ScaleAddRows = ScaleAddRows_SSE2;
} else
#endif
{
ScaleAddRows = ScaleAddRows_C;
}
if (dx & 0xffff) {
ScaleAddCols = ScaleAddCols2_C;
} else {
ScaleAddCols = ScaleAddCols1_C;
}
int y = 0;
for (int j = 0; j < oheight; ++j) {
int iy = y >> 16;
const uint8 *const src = iptr + iy * istride;
y += dy;
if (y > (iheight << 16)) {
y = (iheight << 16);
}
int boxheight = (y >> 16) - iy;
ScaleAddRows(src, istride, row, iwidth, boxheight);
ScaleAddCols(owidth, boxheight, dx, row, optr);
optr += ostride;
}
}
}
/**
* Scale plane to/from any dimensions, with interpolation.
*/
static void ScalePlaneBilinearSimple(int32 iwidth, int32 iheight,
int32 owidth, int32 oheight,
int32 istride, int32 ostride,
const uint8 *iptr, uint8 *optr) {
uint8 *dst = optr;
int dx = (iwidth << 16) / owidth;
int dy = (iheight << 16) / oheight;
int maxx = ((iwidth - 1) << 16) - 1;
int maxy = ((iheight - 1) << 16) - 1;
int y = (oheight < iheight) ? 32768 : (iheight << 16) / oheight - 32768;
for (int i = 0; i < oheight; ++i) {
int cy = (y < 0) ? 0 : y;
int yi = cy >> 16;
int yf = cy & 0xffff;
const uint8 *const src = iptr + yi * istride;
int x = (owidth < iwidth) ? 32768 : (iwidth << 16) / owidth - 32768;
for (int j = 0; j < owidth; ++j) {
int cx = (x < 0) ? 0 : x;
int xi = cx >> 16;
int xf = cx & 0xffff;
int r0 = (src[xi] * (65536 - xf) + src[xi + 1] * xf) >> 16;
int r1 = (src[xi + istride] * (65536 - xf) + src[xi + istride + 1] * xf)
>> 16;
*dst++ = (r0 * (65536 - yf) + r1 * yf) >> 16;
x += dx;
if (x > maxx)
x = maxx;
}
dst += ostride - owidth;
y += dy;
if (y > maxy)
y = maxy;
}
}
/**
* Scale plane to/from any dimensions, with bilinear
* interpolation.
*/
static void ScalePlaneBilinear(int32 iwidth, int32 iheight,
int32 owidth, int32 oheight,
int32 istride, int32 ostride,
const uint8 *iptr, uint8 *optr) {
ASSERT(owidth > 0);
ASSERT(oheight > 0);
int dy = (iheight << 16) / oheight;
int dx = (iwidth << 16) / owidth;
if ((iwidth % 8 != 0) || (iwidth > kMaxInputWidth)) {
ScalePlaneBilinearSimple(iwidth, iheight, owidth, oheight, istride, ostride,
iptr, optr);
} else {
ALIGN16(uint8 row[kMaxInputWidth + 1]);
void (*ScaleFilterRows)(uint8* optr, const uint8* iptr0, int32 istride,
int owidth, int source_y_fraction);
void (*ScaleFilterCols)(uint8* optr, const uint8* iptr,
int owidth, int dx);
#if defined(HAS_SCALEFILTERROWS_SSSE3)
if (libyuv::CpuInfo::TestCpuFlag(libyuv::CpuInfo::kCpuHasSSSE3) &&
(istride % 16 == 0) && IS_ALIGNED(iptr, 16) && (iwidth % 16) == 0) {
ScaleFilterRows = ScaleFilterRows_SSSE3;
} else
#endif
#if defined(HAS_SCALEFILTERROWS_SSE2)
if (libyuv::CpuInfo::TestCpuFlag(libyuv::CpuInfo::kCpuHasSSE2) &&
(istride % 16 == 0) && IS_ALIGNED(iptr, 16) && (iwidth % 16) == 0) {
ScaleFilterRows = ScaleFilterRows_SSE2;
} else
#endif
{
ScaleFilterRows = ScaleFilterRows_C;
}
ScaleFilterCols = ScaleFilterCols_C;
int y = 0;
int maxy = ((iheight - 1) << 16) - 1; // max is filter of last 2 rows.
for (int j = 0; j < oheight; ++j) {
int iy = y >> 16;
int fy = (y >> 8) & 255;
const uint8 *const src = iptr + iy * istride;
ScaleFilterRows(row, src, istride, iwidth, fy);
ScaleFilterCols(optr, row, owidth, dx);
optr += ostride;
y += dy;
if (y > maxy) {
y = maxy;
}
}
}
}
/**
* Scale plane to/from any dimensions, without interpolation.
* Fixed point math is used for performance: The upper 16 bits
* of x and dx is the integer part of the source position and
* the lower 16 bits are the fixed decimal part.
*/
static void ScalePlaneSimple(int32 iwidth, int32 iheight,
int32 owidth, int32 oheight,
int32 istride, int32 ostride,
const uint8 *iptr, uint8 *optr) {
uint8 *dst = optr;
int dx = (iwidth << 16) / owidth;
for (int y = 0; y < oheight; ++y) {
const uint8 *const src = iptr + (y * iheight / oheight) * istride;
// TODO(fbarchard): Round X coordinate by setting x=0x8000.
int x = 0;
for (int i = 0; i < owidth; ++i) {
*dst++ = src[x >> 16];
x += dx;
}
dst += ostride - owidth;
}
}
/**
* Scale plane to/from any dimensions.
*/
static void ScalePlaneAnySize(int32 iwidth, int32 iheight,
int32 owidth, int32 oheight,
int32 istride, int32 ostride,
const uint8 *iptr, uint8 *optr,
bool interpolate) {
if (!interpolate) {
ScalePlaneSimple(iwidth, iheight, owidth, oheight, istride, ostride,
iptr, optr);
} else {
// fall back to non-optimized version
ScalePlaneBilinear(iwidth, iheight, owidth, oheight, istride, ostride,
iptr, optr);
}
}
/**
* Scale plane down, any size
*
* This is an optimized version for scaling down a plane to any size.
* The current implementation is ~10 times faster compared to the
* reference implementation for e.g. XGA->LowResPAL
*
*/
static void ScalePlaneDown(int32 iwidth, int32 iheight,
int32 owidth, int32 oheight,
int32 istride, int32 ostride,
const uint8 *iptr, uint8 *optr,
bool interpolate) {
if (!interpolate) {
ScalePlaneSimple(iwidth, iheight, owidth, oheight, istride, ostride,
iptr, optr);
} else if (iheight * 2 > oheight) { // between 1/2x and 1x use bilinear
ScalePlaneBilinear(iwidth, iheight, owidth, oheight, istride, ostride,
iptr, optr);
} else {
ScalePlaneBox(iwidth, iheight, owidth, oheight, istride, ostride,
iptr, optr);
}
}
/**
* Copy plane, no scaling
*
* This simply copies the given plane without scaling.
* The current implementation is ~115 times faster
* compared to the reference implementation.
*
*/
static void CopyPlane(int32 iwidth, int32 iheight,
int32 owidth, int32 oheight,
int32 istride, int32 ostride,
const uint8 *iptr, uint8 *optr) {
if (istride == iwidth && ostride == owidth) {
// All contiguous, so can use REALLY fast path.
memcpy(optr, iptr, iwidth * iheight);
} else {
// Not all contiguous; must copy scanlines individually
const uint8 *src = iptr;
uint8 *dst = optr;
for (int i = 0; i < iheight; ++i) {
memcpy(dst, src, iwidth);
dst += ostride;
src += istride;
}
}
}
static void ScalePlane(const uint8 *in, int32 istride,
int32 iwidth, int32 iheight,
uint8 *out, int32 ostride,
int32 owidth, int32 oheight,
bool interpolate, bool use_ref) {
// Use specialized scales to improve performance for common resolutions.
// For example, all the 1/2 scalings will use ScalePlaneDown2()
if (owidth == iwidth && oheight == iheight) {
// Straight copy.
CopyPlane(iwidth, iheight, owidth, oheight, istride, ostride, in, out);
} else if (owidth <= iwidth && oheight <= iheight) {
// Scale down.
if (use_ref) {
// For testing, allow the optimized versions to be disabled.
ScalePlaneDown(iwidth, iheight, owidth, oheight, istride, ostride,
in, out, interpolate);
} else if (4 * owidth == 3 * iwidth && 4 * oheight == 3 * iheight) {
// optimized, 3/4
ScalePlaneDown34(iwidth, iheight, owidth, oheight, istride, ostride,
in, out, interpolate);
} else if (2 * owidth == iwidth && 2 * oheight == iheight) {
// optimized, 1/2
ScalePlaneDown2(iwidth, iheight, owidth, oheight, istride, ostride,
in, out, interpolate);
// 3/8 rounded up for odd sized chroma height.
} else if (8 * owidth == 3 * iwidth && oheight == ((iheight * 3 + 7) / 8)) {
// optimized, 3/8
ScalePlaneDown38(iwidth, iheight, owidth, oheight, istride, ostride,
in, out, interpolate);
} else if (4 * owidth == iwidth && 4 * oheight == iheight) {
// optimized, 1/4
ScalePlaneDown4(iwidth, iheight, owidth, oheight, istride, ostride,
in, out, interpolate);
} else if (8 * owidth == iwidth && 8 * oheight == iheight) {
// optimized, 1/8
ScalePlaneDown8(iwidth, iheight, owidth, oheight, istride, ostride,
in, out, interpolate);
} else {
// Arbitrary downsample
ScalePlaneDown(iwidth, iheight, owidth, oheight, istride, ostride,
in, out, interpolate);
}
} else {
// Arbitrary scale up and/or down.
ScalePlaneAnySize(iwidth, iheight, owidth, oheight, istride, ostride,
in, out, interpolate);
}
}
/**
* Scale a plane.
*
* This function in turn calls a scaling function
* suitable for handling the desired resolutions.
*
*/
bool YuvScaler::Scale(const uint8 *inY, const uint8 *inU, const uint8 *inV,
int32 istrideY, int32 istrideU, int32 istrideV,
int32 iwidth, int32 iheight,
uint8 *outY, uint8 *outU, uint8 *outV,
int32 ostrideY, int32 ostrideU, int32 ostrideV,
int32 owidth, int32 oheight,
bool interpolate) {
if (!inY || !inU || !inV || iwidth <= 0 || iheight <= 0 ||
!outY || !outU || !outV || owidth <= 0 || oheight <= 0) {
return false;
}
int32 halfiwidth = (iwidth + 1) >> 1;
int32 halfiheight = (iheight + 1) >> 1;
int32 halfowidth = (owidth + 1) >> 1;
int32 halfoheight = (oheight + 1) >> 1;
ScalePlane(inY, istrideY, iwidth, iheight,
outY, ostrideY, owidth, oheight,
interpolate, use_reference_impl_);
ScalePlane(inU, istrideU, halfiwidth, halfiheight,
outU, ostrideU, halfowidth, halfoheight,
interpolate, use_reference_impl_);
ScalePlane(inV, istrideV, halfiwidth, halfiheight,
outV, ostrideV, halfowidth, halfoheight,
interpolate, use_reference_impl_);
return true;
}
bool YuvScaler::Scale(const uint8 *in, int32 iwidth, int32 iheight,
uint8 *out, int32 owidth, int32 oheight, int32 ooffset,
bool interpolate) {
if (!in || iwidth <= 0 || iheight <= 0 ||
!out || owidth <= 0 || oheight <= 0 || ooffset < 0 ||
ooffset >= oheight) {
return false;
}
ooffset = ooffset & ~1; // chroma requires offset to multiple of 2.
int32 halfiwidth = (iwidth + 1) >> 1;
int32 halfiheight = (iheight + 1) >> 1;
int32 halfowidth = (owidth + 1) >> 1;
int32 halfoheight = (oheight + 1) >> 1;
int32 aheight = oheight - ooffset * 2; // actual output height
const uint8 *const iyptr = in;
uint8 *oyptr = out + ooffset * owidth;
const uint8 *const iuptr = in + iwidth * iheight;
uint8 *ouptr = out + owidth * oheight + (ooffset >> 1) * halfowidth;
const uint8 *const ivptr = in + iwidth * iheight +
halfiwidth * halfiheight;
uint8 *ovptr = out + owidth * oheight + halfowidth * halfoheight +
(ooffset >> 1) * halfowidth;
return Scale(iyptr, iuptr, ivptr, iwidth, halfiwidth, halfiwidth,
iwidth, iheight, oyptr, ouptr, ovptr, owidth,
halfowidth, halfowidth, owidth, aheight, interpolate);
}
} // namespace libyuv
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