/*
* 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 "libyuv/scale.h"
#include <assert.h>
#include <string.h>
#include "libyuv/cpu_id.h"
#if defined(_MSC_VER)
#define ALIGN16(var) __declspec(align(16)) var
#else
#define ALIGN16(var) var __attribute__((aligned(16)))
#endif
// 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
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.
static bool use_reference_impl_ = false;
void SetUseReferenceImpl(bool use) {
use_reference_impl_ = use;
}
/**
* NEON downscalers with interpolation.
*
* Provided by Fritz Koenig
*
*/
#if defined(__ARM_NEON__) && !defined(COVERAGE_ENABLED)
#define HAS_SCALEROWDOWN2_NEON
void ScaleRowDown2_NEON(const uint8* src_ptr, int /* src_stride */,
uint8* dst, int dst_width) {
__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"
: "+r"(src_ptr), // %0
"+r"(dst), // %1
"+r"(dst_width) // %2
:
: "q0", "q1" // Clobber List
);
}
void ScaleRowDown2Int_NEON(const uint8* src_ptr, int src_stride,
uint8* dst, int dst_width) {
__asm__ volatile
(
"mov r4, #2 \n" // rounding constant
"add %1, %0 \n" // change the stride to row 2 pointer
"vdup.16 q4, r4 \n"
"1:\n"
"vld1.u8 {q0,q1}, [%0]! \n" // load row 1 and post increment
"vld1.u8 {q2,q3}, [%1]! \n" // load row 2 and post increment
"vpaddl.u8 q0, q0 \n" // row 1 add adjacent
"vpaddl.u8 q1, q1 \n"
"vpadal.u8 q0, q2 \n" // row 2 add adjacent, add row 1 to row 2
"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"
: "+r"(src_ptr), // %0
"+r"(src_stride), // %1
"+r"(dst), // %2
"+r"(dst_width) // %3
:
: "r4", "q0", "q1", "q2", "q3", "q4" // Clobber List
);
}
#define HAS_SCALEROWDOWN4_NEON
// Expecting widths on arm devices to be smaller. Went with 8x4 blocks
// to get most coverage. Look to back and evaluate 16x4 blocks with
// handling of leftovers.
static void ScaleRowDown4_NEON(const uint8* src_ptr, int /* src_stride */,
uint8* dst_ptr, int dst_width) {
__asm__ volatile
(
"mov r4, #4 \n"
"1: \n"
"vld1.u8 {d0[0]}, [%0],r4 \n" // load up only 2 pixels of data to
"vld1.u8 {d0[1]}, [%0],r4 \n" // represent the entire 8x4 block
"vst1.u16 {d0[0]}, [%1]! \n"
"subs %2, #2 \n" // dst_width -= 2
"bhi 1b \n"
: "+r"(src_ptr), // %0
"+r"(dst_ptr), // %1
"+r"(dst_width) // %2
:
: "r4", "q0", "q1", "memory", "cc"
);
}
static void ScaleRowDown4Int_NEON(const uint8* src_ptr, int src_stride,
uint8* dst_ptr, int dst_width) {
__asm__ volatile
(
"1: \n"
"mov r4, %0 \n"
"vld1.u8 {d0}, [r4],%3 \n" // load up 8x4 block of input data
"vld1.u8 {d1}, [r4],%3 \n"
"vld1.u8 {d2}, [r4],%3 \n"
"vld1.u8 {d3}, [r4] \n"
// data is loaded up int q0 and q1
// q0 = a00 a01 a02 a03 b00 b01 b02 b03 a10 a11 a12 a13 b10 b11 b12 b13
// q1 = a20 a21 a22 a23 b20 b21 b22 b23 a20 a21 a22 a23 b20 b21 b22 b23
// q0 = a00+a01 a02+a03 b00+b01 b02+b03 a10+a11 a12+a13 b10+b11 b12+b13
"vpaddl.u8 q0, q0 \n"
// d0 = a00+a01+a20+a21 a02+a03+a22+a23 b00+b01+b20+b21 b02+b03+b22+b23
// d1 = a10+a11+a20+a21 a12+a13+a22+a23 b10+b11+b20+b21 b12+b13+b22+b23
"vpadal.u8 q0, q1 \n"
// d0 = a00+a01+a20+a21+a02+a03+a22+a23 b00+b01+b20+b21+b02+b03+b22+b23
// d1 = a10+a11+a20+a21+a12+a13+a22+a23 b10+b11+b20+b21+b12+b13+b22+b23
"vpaddl.u16 q0, q0 \n"
// d0 = a00+a01+a20+a21+a02+a03+a22+a23+a10+a11+a20+a21+a12+a13+a22+a23
// b00+b01+b20+b21+b02+b03+b22+b23+b10+b11+b20+b21+b12+b13+b22+b23
"vadd.u32 d0, d1 \n"
"vrshr.u32 d0, d0, #4 \n" // divide by 16 w/rounding
"vst1.u8 {d0[0]}, [%1]! \n"
"vst1.u8 {d0[4]}, [%1]! \n"
"add %0, #8 \n" // move src pointer to next 8 pixels
"subs %2, #2 \n" // dst_width -= 2
"bhi 1b \n"
: "+r"(src_ptr), // %0
"+r"(dst_ptr), // %1
"+r"(dst_width) // %2
: "r"(src_stride) // %3
: "r4", "q0", "q1", "memory", "cc"
);
}
/**
* SSE2 downscalers with interpolation.
*
* Provided by Frank Barchard (fbarchard@google.com)
*
*/
// Constants for SSE2 code
#elif (defined(WIN32) || defined(__i386__) || defined(__x86_64__)) && \
!defined(COVERAGE_ENABLED) && !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: src_ptr 16 byte aligned, dst_ptr 16 byte aligned.
__declspec(naked)
static void ScaleRowDown2_SSE2(const uint8* src_ptr, int src_stride,
uint8* dst_ptr, int dst_width) {
__asm {
mov eax, [esp + 4] // src_ptr
// src_stride ignored
mov edx, [esp + 12] // dst_ptr
mov ecx, [esp + 16] // dst_width
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: src_ptr 16 byte aligned, dst_ptr 16 byte aligned.
__declspec(naked)
static void ScaleRowDown2Int_SSE2(const uint8* src_ptr, int src_stride,
uint8* dst_ptr, int dst_width) {
__asm {
push esi
mov eax, [esp + 4 + 4] // src_ptr
mov esi, [esp + 4 + 8] // src_stride
mov edx, [esp + 4 + 12] // dst_ptr
mov ecx, [esp + 4 + 16] // dst_width
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: src_ptr 16 byte aligned, dst_ptr 8 byte aligned.
__declspec(naked)
static void ScaleRowDown4_SSE2(const uint8* src_ptr, int src_stride,
uint8* dst_ptr, int dst_width) {
__asm {
pushad
mov esi, [esp + 32 + 4] // src_ptr
// src_stride ignored
mov edi, [esp + 32 + 12] // dst_ptr
mov ecx, [esp + 32 + 16] // dst_width
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: src_ptr 16 byte aligned, dst_ptr 8 byte aligned.
__declspec(naked)
static void ScaleRowDown4Int_SSE2(const uint8* src_ptr, int src_stride,
uint8* dst_ptr, int dst_width) {
__asm {
pushad
mov esi, [esp + 32 + 4] // src_ptr
mov ebx, [esp + 32 + 8] // src_stride
mov edi, [esp + 32 + 12] // dst_ptr
mov ecx, [esp + 32 + 16] // dst_width
pcmpeqb xmm7, xmm7 // generate mask 0x00ff00ff
psrlw xmm7, 8
lea edx, [ebx + ebx * 2] // src_stride * 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: src_ptr 16 byte aligned, dst_ptr 4 byte aligned.
__declspec(naked)
static void ScaleRowDown8_SSE2(const uint8* src_ptr, int src_stride,
uint8* dst_ptr, int dst_width) {
__asm {
pushad
mov esi, [esp + 32 + 4] // src_ptr
// src_stride ignored
mov edi, [esp + 32 + 12] // dst_ptr
mov ecx, [esp + 32 + 16] // dst_width
pcmpeqb xmm7, xmm7 // generate mask isolating 1 src 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: src_ptr 16 byte aligned, dst_ptr 4 byte aligned.
__declspec(naked)
static void ScaleRowDown8Int_SSE2(const uint8* src_ptr, int src_stride,
uint8* dst_ptr, int dst_width) {
__asm {
pushad
mov esi, [esp + 32 + 4] // src_ptr
mov ebx, [esp + 32 + 8] // src_stride
mov edi, [esp + 32 + 12] // dst_ptr
mov ecx, [esp + 32 + 16] // dst_width
lea edx, [ebx + ebx * 2] // src_stride * 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: src_ptr 16 byte aligned, dst_ptr 8 byte aligned.
__declspec(naked)
static void ScaleRowDown34_SSSE3(const uint8* src_ptr, int src_stride,
uint8* dst_ptr, int dst_width) {
__asm {
pushad
mov esi, [esp + 32 + 4] // src_ptr
// src_stride ignored
mov edi, [esp + 32 + 12] // dst_ptr
mov ecx, [esp + 32 + 16] // dst_width
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 src_row 0
// xmm1 src_row 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: src_ptr 16 byte aligned, dst_ptr 8 byte aligned.
__declspec(naked)
static void ScaleRowDown34_1_Int_SSSE3(const uint8* src_ptr, int src_stride,
uint8* dst_ptr, int dst_width) {
__asm {
pushad
mov esi, [esp + 32 + 4] // src_ptr
mov ebx, [esp + 32 + 8] // src_stride
mov edi, [esp + 32 + 12] // dst_ptr
mov ecx, [esp + 32 + 16] // dst_width
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: src_ptr 16 byte aligned, dst_ptr 8 byte aligned.
__declspec(naked)
static void ScaleRowDown34_0_Int_SSSE3(const uint8* src_ptr, int src_stride,
uint8* dst_ptr, int dst_width) {
__asm {
pushad
mov esi, [esp + 32 + 4] // src_ptr
mov ebx, [esp + 32 + 8] // src_stride
mov edi, [esp + 32 + 12] // dst_ptr
mov ecx, [esp + 32 + 16] // dst_width
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* src_ptr, int src_stride,
uint8* dst_ptr, int dst_width) {
__asm {
pushad
mov esi, [esp + 32 + 4] // src_ptr
mov edx, [esp + 32 + 8] // src_stride
mov edi, [esp + 32 + 12] // dst_ptr
mov ecx, [esp + 32 + 16] // dst_width
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* src_ptr, int src_stride,
uint8* dst_ptr, int dst_width) {
__asm {
pushad
mov esi, [esp + 32 + 4] // src_ptr
mov edx, [esp + 32 + 8] // src_stride
mov edi, [esp + 32 + 12] // dst_ptr
mov ecx, [esp + 32 + 16] // dst_width
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* src_ptr, int src_stride,
uint8* dst_ptr, int dst_width) {
__asm {
pushad
mov esi, [esp + 32 + 4] // src_ptr
mov edx, [esp + 32 + 8] // src_stride
mov edi, [esp + 32 + 12] // dst_ptr
mov ecx, [esp + 32 + 16] // dst_width
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* src_ptr, int src_stride,
uint16* dst_ptr, int src_width,
int src_height) {
__asm {
pushad
mov esi, [esp + 32 + 4] // src_ptr
mov edx, [esp + 32 + 8] // src_stride
mov edi, [esp + 32 + 12] // dst_ptr
mov ecx, [esp + 32 + 16] // dst_width
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* dst_ptr, const uint8* src_ptr,
int src_stride, int dst_width,
int source_y_fraction) {
__asm {
push esi
push edi
mov edi, [esp + 8 + 4] // dst_ptr
mov esi, [esp + 8 + 8] // src_ptr
mov edx, [esp + 8 + 12] // src_stride
mov ecx, [esp + 8 + 16] // dst_width
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* dst_ptr, const uint8* src_ptr,
int src_stride, int dst_width,
int source_y_fraction) {
__asm {
push esi
push edi
mov edi, [esp + 8 + 4] // dst_ptr
mov esi, [esp + 8 + 8] // src_ptr
mov edx, [esp + 8 + 12] // src_stride
mov ecx, [esp + 8 + 16] // dst_width
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: src_ptr 16 byte aligned, dst_ptr 8 byte aligned.
__declspec(naked)
static void ScaleFilterCols34_SSSE3(uint8* dst_ptr, const uint8* src_ptr,
int dst_width) {
__asm {
mov edx, [esp + 4] // dst_ptr
mov eax, [esp + 8] // src_ptr
mov ecx, [esp + 12] // dst_width
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(__x86_64__) || defined(__i386__)) && \
!defined(COVERAGE_ENABLED) && !defined(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
static void ScaleRowDown2_SSE2(const uint8* src_ptr, int src_stride,
uint8* dst_ptr, int dst_width) {
asm volatile(
"pcmpeqb %%xmm7,%%xmm7\n"
"psrlw $0x8,%%xmm7\n"
"1:"
"movdqa (%0),%%xmm0\n"
"movdqa 0x10(%0),%%xmm1\n"
"lea 0x20(%0),%0\n"
"pand %%xmm7,%%xmm0\n"
"pand %%xmm7,%%xmm1\n"
"packuswb %%xmm1,%%xmm0\n"
"movdqa %%xmm0,(%1)\n"
"lea 0x10(%1),%1\n"
"sub $0x10,%2\n"
"ja 1b\n"
: "+r"(src_ptr), // %0
"+r"(dst_ptr), // %1
"+r"(dst_width) // %2
:
: "memory"
);
}
static void ScaleRowDown2Int_SSE2(const uint8* src_ptr, int src_stride,
uint8* dst_ptr, int dst_width) {
asm volatile(
"pcmpeqb %%xmm7,%%xmm7\n"
"psrlw $0x8,%%xmm7\n"
"1:"
"movdqa (%0),%%xmm0\n"
"movdqa 0x10(%0),%%xmm1\n"
"movdqa (%0,%3,1),%%xmm2\n"
"movdqa 0x10(%0,%3,1),%%xmm3\n"
"lea 0x20(%0),%0\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,(%1)\n"
"lea 0x10(%1),%1\n"
"sub $0x10,%2\n"
"ja 1b\n"
: "+r"(src_ptr), // %0
"+r"(dst_ptr), // %1
"+r"(dst_width) // %2
: "r"(static_cast<intptr_t>(src_stride)) // %3
: "memory"
);
}
#define HAS_SCALEROWDOWN4_SSE2
static void ScaleRowDown4_SSE2(const uint8* src_ptr, int src_stride,
uint8* dst_ptr, int dst_width) {
asm volatile(
"pcmpeqb %%xmm7,%%xmm7\n"
"psrld $0x18,%%xmm7\n"
"1:"
"movdqa (%0),%%xmm0\n"
"movdqa 0x10(%0),%%xmm1\n"
"lea 0x20(%0),%0\n"
"pand %%xmm7,%%xmm0\n"
"pand %%xmm7,%%xmm1\n"
"packuswb %%xmm1,%%xmm0\n"
"packuswb %%xmm0,%%xmm0\n"
"movq %%xmm0,(%1)\n"
"lea 0x8(%1),%1\n"
"sub $0x8,%2\n"
"ja 1b\n"
: "+r"(src_ptr), // %0
"+r"(dst_ptr), // %1
"+r"(dst_width) // %2
:
: "memory"
);
}
static void ScaleRowDown4Int_SSE2(const uint8* src_ptr, int src_stride,
uint8* dst_ptr, int dst_width) {
intptr_t temp = 0;
asm volatile(
"pcmpeqb %%xmm7,%%xmm7\n"
"psrlw $0x8,%%xmm7\n"
"lea (%4,%4,2),%3\n"
"1:"
"movdqa (%0),%%xmm0\n"
"movdqa 0x10(%0),%%xmm1\n"
"movdqa (%0,%4,1),%%xmm2\n"
"movdqa 0x10(%0,%4,1),%%xmm3\n"
"pavgb %%xmm2,%%xmm0\n"
"pavgb %%xmm3,%%xmm1\n"
"movdqa (%0,%4,2),%%xmm2\n"
"movdqa 0x10(%0,%4,2),%%xmm3\n"
"movdqa (%0,%3,1),%%xmm4\n"
"movdqa 0x10(%0,%3,1),%%xmm5\n"
"lea 0x20(%0),%0\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,(%1)\n"
"lea 0x8(%1),%1\n"
"sub $0x8,%2\n"
"ja 1b\n"
: "+r"(src_ptr), // %0
"+r"(dst_ptr), // %1
"+r"(dst_width), // %2
"+r"(temp) // %3
: "r"(static_cast<intptr_t>(src_stride)) // %4
: "memory"
);
}
#define HAS_SCALEROWDOWN8_SSE2
static void ScaleRowDown8_SSE2(const uint8* src_ptr, int src_stride,
uint8* dst_ptr, int dst_width) {
asm volatile(
"pcmpeqb %%xmm7,%%xmm7\n"
"psrlq $0x38,%%xmm7\n"
"1:"
"movdqa (%0),%%xmm0\n"
"movdqa 0x10(%0),%%xmm1\n"
"lea 0x20(%0),%0\n"
"pand %%xmm7,%%xmm0\n"
"pand %%xmm7,%%xmm1\n"
"packuswb %%xmm1,%%xmm0\n"
"packuswb %%xmm0,%%xmm0\n"
"packuswb %%xmm0,%%xmm0\n"
"movd %%xmm0,(%1)\n"
"lea 0x4(%1),%1\n"
"sub $0x4,%2\n"
"ja 1b\n"
: "+r"(src_ptr), // %0
"+r"(dst_ptr), // %1
"+r"(dst_width) // %2
:
: "memory"
);
}
#if defined(__i386__)
extern "C" void ScaleRowDown8Int_SSE2(const uint8* src_ptr, int src_stride,
uint8* dst_ptr, int dst_width);
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* src_ptr, int src_stride,
uint8* dst_ptr, int dst_width);
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* src_ptr, int src_stride,
uint8* dst_ptr, int dst_width);
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* src_ptr, int src_stride,
uint8* dst_ptr, int dst_width);
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* src_ptr, int src_stride,
uint8* dst_ptr, int dst_width);
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* src_ptr, int src_stride,
uint8* dst_ptr, int dst_width);
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* src_ptr, int src_stride,
uint8* dst_ptr, int dst_width);
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* src_ptr, int src_stride,
uint16* dst_ptr, int src_width,
int src_height);
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* dst_ptr,
const uint8* src_ptr, int src_stride,
int dst_width, 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* dst_ptr,
const uint8* src_ptr, int src_stride,
int dst_width, 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"
);
#elif defined(__x86_64__)
static void ScaleRowDown8Int_SSE2(const uint8* src_ptr, int src_stride,
uint8* dst_ptr, int dst_width) {
asm volatile(
"lea (%3,%3,2),%%r10\n"
"pxor %%xmm7,%%xmm7\n"
"1:"
"movdqa (%0),%%xmm0\n"
"movdqa 0x10(%0),%%xmm1\n"
"movdqa (%0,%3,1),%%xmm2\n"
"movdqa 0x10(%0,%3,1),%%xmm3\n"
"pavgb %%xmm2,%%xmm0\n"
"pavgb %%xmm3,%%xmm1\n"
"movdqa (%0,%3,2),%%xmm2\n"
"movdqa 0x10(%0,%3,2),%%xmm3\n"
"movdqa (%0,%%r10,1),%%xmm4\n"
"movdqa 0x10(%0,%%r10,1),%%xmm5\n"
"lea (%0,%3,4),%%r11\n"
"lea 0x20(%0),%0\n"
"pavgb %%xmm4,%%xmm2\n"
"pavgb %%xmm5,%%xmm3\n"
"pavgb %%xmm2,%%xmm0\n"
"pavgb %%xmm3,%%xmm1\n"
"movdqa 0x0(%%r11),%%xmm2\n"
"movdqa 0x10(%%r11),%%xmm3\n"
"movdqa 0x0(%%r11,%3,1),%%xmm4\n"
"movdqa 0x10(%%r11,%3,1),%%xmm5\n"
"pavgb %%xmm4,%%xmm2\n"
"pavgb %%xmm5,%%xmm3\n"
"movdqa 0x0(%%r11,%3,2),%%xmm4\n"
"movdqa 0x10(%%r11,%3,2),%%xmm5\n"
"movdqa 0x0(%%r11,%%r10,1),%%xmm6\n"
"pavgb %%xmm6,%%xmm4\n"
"movdqa 0x10(%%r11,%%r10,1),%%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,(%1)\n"
"lea 0x4(%1),%1\n"
"sub $0x4,%2\n"
"ja 1b\n"
: "+r"(src_ptr), // %0
"+r"(dst_ptr), // %1
"+r"(dst_width) // %2
: "r"(static_cast<intptr_t>(src_stride)) // %3
: "memory", "r10", "r11", "xmm0", "xmm1", "xmm2", "xmm3",
"xmm4", "xmm5", "xmm6", "xmm7"
);
}
#define HAS_SCALEROWDOWN34_SSSE3
static void ScaleRowDown34_SSSE3(const uint8* src_ptr, int src_stride,
uint8* dst_ptr, int dst_width) {
asm volatile(
"movdqa (%3),%%xmm3\n"
"movdqa (%4),%%xmm4\n"
"movdqa (%5),%%xmm5\n"
"1:"
"movdqa (%0),%%xmm0\n"
"movdqa 0x10(%0),%%xmm2\n"
"lea 0x20(%0),%0\n"
"movdqa %%xmm2,%%xmm1\n"
"palignr $0x8,%%xmm0,%%xmm1\n"
"pshufb %%xmm3,%%xmm0\n"
"pshufb %%xmm4,%%xmm1\n"
"pshufb %%xmm5,%%xmm2\n"
"movq %%xmm0,(%1)\n"
"movq %%xmm1,0x8(%1)\n"
"movq %%xmm2,0x10(%1)\n"
"lea 0x18(%1),%1\n"
"sub $0x18,%2\n"
"ja 1b\n"
: "+r"(src_ptr), // %0
"+r"(dst_ptr), // %1
"+r"(dst_width) // %2
: "r"(_shuf0), // %3
"r"(_shuf1), // %4
"r"(_shuf2) // %5
: "memory", "xmm0", "xmm1", "xmm2", "xmm3", "xmm4", "xmm5"
);
}
static void ScaleRowDown34_1_Int_SSSE3(const uint8* src_ptr, int src_stride,
uint8* dst_ptr, int dst_width) {
asm volatile(
"movdqa (%4),%%xmm2\n" // _shuf01
"movdqa (%5),%%xmm3\n" // _shuf11
"movdqa (%6),%%xmm4\n" // _shuf21
"movdqa (%7),%%xmm5\n" // _madd01
"movdqa (%8),%%xmm6\n" // _madd11
"movdqa (%9),%%xmm7\n" // _round34
"movdqa (%10),%%xmm8\n" // _madd21
"1:"
"movdqa (%0),%%xmm0\n"
"movdqa (%0,%3),%%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,(%1)\n"
"movdqu 0x8(%0),%%xmm0\n"
"movdqu 0x8(%0,%3),%%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(%1)\n"
"movdqa 0x10(%0),%%xmm0\n"
"movdqa 0x10(%0,%3),%%xmm1\n"
"lea 0x20(%0),%0\n"
"pavgb %%xmm1,%%xmm0\n"
"pshufb %%xmm4,%%xmm0\n"
"pmaddubsw %%xmm8,%%xmm0\n"
"paddsw %%xmm7,%%xmm0\n"
"psrlw $0x2,%%xmm0\n"
"packuswb %%xmm0,%%xmm0\n"
"movq %%xmm0,0x10(%1)\n"
"lea 0x18(%1),%1\n"
"sub $0x18,%2\n"
"ja 1b\n"
: "+r"(src_ptr), // %0
"+r"(dst_ptr), // %1
"+r"(dst_width) // %2
: "r"(static_cast<intptr_t>(src_stride)), // %3
"r"(_shuf01), // %4
"r"(_shuf11), // %5
"r"(_shuf21), // %6
"r"(_madd01), // %7
"r"(_madd11), // %8
"r"(_round34), // %9
"r"(_madd21) // %10
: "memory", "xmm0", "xmm1", "xmm2", "xmm3",
"xmm4", "xmm5", "xmm6", "xmm7", "xmm8"
);
}
static void ScaleRowDown34_0_Int_SSSE3(const uint8* src_ptr, int src_stride,
uint8* dst_ptr, int dst_width) {
asm volatile(
"movdqa (%4),%%xmm2\n" // _shuf01
"movdqa (%5),%%xmm3\n" // _shuf11
"movdqa (%6),%%xmm4\n" // _shuf21
"movdqa (%7),%%xmm5\n" // _madd01
"movdqa (%8),%%xmm6\n" // _madd11
"movdqa (%9),%%xmm7\n" // _round34
"movdqa (%10),%%xmm8\n" // _madd21
"1:"
"movdqa (%0),%%xmm0\n"
"movdqa (%0,%3,1),%%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,(%1)\n"
"movdqu 0x8(%0),%%xmm0\n"
"movdqu 0x8(%0,%3,1),%%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(%1)\n"
"movdqa 0x10(%0),%%xmm0\n"
"movdqa 0x10(%0,%3,1),%%xmm1\n"
"lea 0x20(%0),%0\n"
"pavgb %%xmm0,%%xmm1\n"
"pavgb %%xmm1,%%xmm0\n"
"pshufb %%xmm4,%%xmm0\n"
"pmaddubsw %%xmm8,%%xmm0\n"
"paddsw %%xmm7,%%xmm0\n"
"psrlw $0x2,%%xmm0\n"
"packuswb %%xmm0,%%xmm0\n"
"movq %%xmm0,0x10(%1)\n"
"lea 0x18(%1),%1\n"
"sub $0x18,%2\n"
"ja 1b\n"
: "+r"(src_ptr), // %0
"+r"(dst_ptr), // %1
"+r"(dst_width) // %2
: "r"(static_cast<intptr_t>(src_stride)), // %3
"r"(_shuf01), // %4
"r"(_shuf11), // %5
"r"(_shuf21), // %6
"r"(_madd01), // %7
"r"(_madd11), // %8
"r"(_round34), // %9
"r"(_madd21) // %10
: "memory", "xmm0", "xmm1", "xmm2", "xmm3",
"xmm4", "xmm5", "xmm6", "xmm7", "xmm8"
);
}
#define HAS_SCALEROWDOWN38_SSSE3
static void ScaleRowDown38_SSSE3(const uint8* src_ptr, int src_stride,
uint8* dst_ptr, int dst_width) {
asm volatile(
"movdqa (%3),%%xmm5\n"
"movdqa (%4),%%xmm6\n"
"pxor %%xmm7,%%xmm7\n"
"1:"
"movdqa (%0),%%xmm0\n"
"movdqa 0x10(%0),%%xmm1\n"
"lea 0x20(%0),%0\n"
"pshufb %%xmm5,%%xmm0\n"
"pshufb %%xmm6,%%xmm1\n"
"paddusb %%xmm1,%%xmm0\n"
"movq %%xmm0,(%1)\n"
"movhlps %%xmm0,%%xmm1\n"
"movd %%xmm1,0x8(%1)\n"
"lea 0xc(%1),%1\n"
"sub $0xc,%2\n"
"ja 1b\n"
: "+r"(src_ptr), // %0
"+r"(dst_ptr), // %1
"+r"(dst_width) // %2
: "r"(_shuf38a), // %3
"r"(_shuf38b) // %4
: "memory", "xmm0", "xmm1", "xmm5", "xmm6", "xmm7"
);
}
static void ScaleRowDown38_3_Int_SSSE3(const uint8* src_ptr, int src_stride,
uint8* dst_ptr, int dst_width) {
asm volatile(
"movdqa (%4),%%xmm4\n"
"movdqa (%5),%%xmm5\n"
"movdqa (%6),%%xmm6\n"
"pxor %%xmm7,%%xmm7\n"
"1:"
"movdqa (%0),%%xmm0\n"
"movdqa (%0,%3,1),%%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 (%0,%3,2),%%xmm2\n"
"lea 0x10(%0),%0\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,(%1)\n"
"pextrw $0x2,%%xmm2,%%eax\n"
"mov %%ax,0x4(%1)\n"
"lea 0x6(%1),%1\n"
"sub $0x6,%2\n"
"ja 1b\n"
: "+r"(src_ptr), // %0
"+r"(dst_ptr), // %1
"+r"(dst_width) // %2
: "r"(static_cast<intptr_t>(src_stride)), // %3
"r"(_shufac0), // %4
"r"(_shufac3), // %5
"r"(_scaleac3) // %6
: "memory", "rax", "xmm0", "xmm1", "xmm2", "xmm3",
"xmm4", "xmm5", "xmm6", "xmm7"
);
}
static void ScaleRowDown38_2_Int_SSSE3(const uint8* src_ptr, int src_stride,
uint8* dst_ptr, int dst_width) {
asm volatile(
"movdqa (%4),%%xmm4\n"
"movdqa (%5),%%xmm5\n"
"movdqa (%6),%%xmm6\n"
"movdqa (%7),%%xmm7\n"
"1:"
"movdqa (%0),%%xmm2\n"
"pavgb (%0,%3,1),%%xmm2\n"
"lea 0x10(%0),%0\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,(%1)\n"
"pextrw $0x2,%%xmm0,%%eax\n"
"mov %%ax,0x4(%1)\n"
"lea 0x6(%1),%1\n"
"sub $0x6,%2\n"
"ja 1b\n"
: "+r"(src_ptr), // %0
"+r"(dst_ptr), // %1
"+r"(dst_width) // %2
: "r"(static_cast<intptr_t>(src_stride)), // %3
"r"(_shufab0), // %4
"r"(_shufab1), // %5
"r"(_shufab2), // %6
"r"(_scaleab2) // %7
: "memory", "rax", "xmm0", "xmm1", "xmm2",
"xmm4", "xmm5", "xmm6", "xmm7"
);
}
#define HAS_SCALEADDROWS_SSE2
static void ScaleAddRows_SSE2(const uint8* src_ptr, int src_stride,
uint16* dst_ptr, int src_width,
int src_height) {
asm volatile(
"pxor %%xmm7,%%xmm7\n"
"1:"
"movdqa (%0),%%xmm2\n"
"lea (%0,%4,1),%%r10\n"
"movhlps %%xmm2,%%xmm3\n"
"lea -0x1(%3),%%r11\n"
"punpcklbw %%xmm7,%%xmm2\n"
"punpcklbw %%xmm7,%%xmm3\n"
"2:"
"movdqa (%%r10),%%xmm0\n"
"lea (%%r10,%4,1),%%r10\n"
"movhlps %%xmm0,%%xmm1\n"
"punpcklbw %%xmm7,%%xmm0\n"
"punpcklbw %%xmm7,%%xmm1\n"
"paddusw %%xmm0,%%xmm2\n"
"paddusw %%xmm1,%%xmm3\n"
"sub $0x1,%%r11\n"
"ja 2b\n"
"movdqa %%xmm2,(%1)\n"
"movdqa %%xmm3,0x10(%1)\n"
"lea 0x20(%1),%1\n"
"lea 0x10(%0),%0\n"
"sub $0x10,%2\n"
"ja 1b\n"
: "+r"(src_ptr), // %0
"+r"(dst_ptr), // %1
"+r"(src_width), // %2
"+r"(src_height) // %3
: "r"(static_cast<intptr_t>(src_stride)) // %4
: "memory", "r10", "r11", "xmm0", "xmm1", "xmm2", "xmm3", "xmm7"
);
}
// Bilinear row filtering combines 16x2 -> 16x1. SSE2 version
#define HAS_SCALEFILTERROWS_SSE2
static void ScaleFilterRows_SSE2(uint8* dst_ptr,
const uint8* src_ptr, int src_stride,
int dst_width, int source_y_fraction) {
if (source_y_fraction == 0) {
asm volatile(
"1:"
"movdqa (%1),%%xmm0\n"
"lea 0x10(%1),%1\n"
"movdqa %%xmm0,(%0)\n"
"lea 0x10(%0),%0\n"
"sub $0x10,%2\n"
"ja 1b\n"
"mov -0x1(%0),%%al\n"
"mov %%al,(%0)\n"
: "+r"(dst_ptr), // %0
"+r"(src_ptr), // %1
"+r"(dst_width) // %2
:
: "memory", "rax", "xmm0"
);
return;
} else if (source_y_fraction == 128) {
asm volatile(
"1:"
"movdqa (%1),%%xmm0\n"
"movdqa (%1,%3,1),%%xmm2\n"
"lea 0x10(%1),%1\n"
"pavgb %%xmm2,%%xmm0\n"
"movdqa %%xmm0,(%0)\n"
"lea 0x10(%0),%0\n"
"sub $0x10,%2\n"
"ja 1b\n"
"mov -0x1(%0),%%al\n"
"mov %%al,(%0)\n"
: "+r"(dst_ptr), // %0
"+r"(src_ptr), // %1
"+r"(dst_width) // %2
: "r"(static_cast<intptr_t>(src_stride)) // %3
: "memory", "rax", "xmm0", "xmm2"
);
return;
} else {
asm volatile(
"mov %3,%%eax\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 (%1),%%xmm0\n"
"movdqa (%1,%4,1),%%xmm2\n"
"lea 0x10(%1),%1\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,(%0)\n"
"lea 0x10(%0),%0\n"
"sub $0x10,%2\n"
"ja 1b\n"
"mov -0x1(%0),%%al\n"
"mov %%al,(%0)\n"
: "+r"(dst_ptr), // %0
"+r"(src_ptr), // %1
"+r"(dst_width), // %2
"+r"(source_y_fraction) // %3
: "r"(static_cast<intptr_t>(src_stride)) // %4
: "memory", "rax", "xmm0", "xmm1", "xmm2", "xmm3",
"xmm5", "xmm6", "xmm7"
);
}
return;
}
// Bilinear row filtering combines 16x2 -> 16x1. SSSE3 version
#define HAS_SCALEFILTERROWS_SSSE3
static void ScaleFilterRows_SSSE3(uint8* dst_ptr,
const uint8* src_ptr, int src_stride,
int dst_width, int source_y_fraction) {
if (source_y_fraction == 0) {
asm volatile(
"1:"
"movdqa (%1),%%xmm0\n"
"lea 0x10(%1),%1\n"
"movdqa %%xmm0,(%0)\n"
"lea 0x10(%0),%0\n"
"sub $0x10,%2\n"
"ja 1b\n"
"mov -0x1(%0),%%al\n"
"mov %%al,(%0)\n"
: "+r"(dst_ptr), // %0
"+r"(src_ptr), // %1
"+r"(dst_width) // %2
:
: "memory", "rax", "xmm0"
);
return;
} else if (source_y_fraction == 128) {
asm volatile(
"1:"
"movdqa (%1),%%xmm0\n"
"movdqa (%1,%3,1),%%xmm2\n"
"lea 0x10(%1),%1\n"
"pavgb %%xmm2,%%xmm0\n"
"movdqa %%xmm0,(%0)\n"
"lea 0x10(%0),%0\n"
"sub $0x10,%2\n"
"ja 1b\n"
"mov -0x1(%0),%%al\n"
"mov %%al,(%0)\n"
: "+r"(dst_ptr), // %0
"+r"(src_ptr), // %1
"+r"(dst_width) // %2
: "r"(static_cast<intptr_t>(src_stride)) // %3
: "memory", "rax", "xmm0", "xmm2"
);
return;
} else {
asm volatile(
"mov %3,%%eax\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 (%1),%%xmm0\n"
"movdqa (%1,%4,1),%%xmm2\n"
"lea 0x10(%1),%1\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,(%0)\n"
"lea 0x10(%0),%0\n"
"sub $0x10,%2\n"
"ja 1b\n"
"mov -0x1(%0),%%al\n"
"mov %%al,(%0)\n"
: "+r"(dst_ptr), // %0
"+r"(src_ptr), // %1
"+r"(dst_width), // %2
"+r"(source_y_fraction) // %3
: "r"(static_cast<intptr_t>(src_stride)) // %4
: "memory", "rax", "xmm0", "xmm1", "xmm2", "xmm7"
);
}
return;
}
#endif
#endif
// CPU agnostic row functions
static void ScaleRowDown2_C(const uint8* src_ptr, int,
uint8* dst, int dst_width) {
for (int x = 0; x < dst_width; ++x) {
*dst++ = *src_ptr;
src_ptr += 2;
}
}
static void ScaleRowDown2Int_C(const uint8* src_ptr, int src_stride,
uint8* dst, int dst_width) {
for (int x = 0; x < dst_width; ++x) {
*dst++ = (src_ptr[0] + src_ptr[1] +
src_ptr[src_stride] + src_ptr[src_stride + 1] + 2) >> 2;
src_ptr += 2;
}
}
static void ScaleRowDown4_C(const uint8* src_ptr, int,
uint8* dst, int dst_width) {
for (int x = 0; x < dst_width; ++x) {
*dst++ = *src_ptr;
src_ptr += 4;
}
}
static void ScaleRowDown4Int_C(const uint8* src_ptr, int src_stride,
uint8* dst, int dst_width) {
for (int x = 0; x < dst_width; ++x) {
*dst++ = (src_ptr[0] + src_ptr[1] + src_ptr[2] + src_ptr[3] +
src_ptr[src_stride + 0] + src_ptr[src_stride + 1] +
src_ptr[src_stride + 2] + src_ptr[src_stride + 3] +
src_ptr[src_stride * 2 + 0] + src_ptr[src_stride * 2 + 1] +
src_ptr[src_stride * 2 + 2] + src_ptr[src_stride * 2 + 3] +
src_ptr[src_stride * 3 + 0] + src_ptr[src_stride * 3 + 1] +
src_ptr[src_stride * 3 + 2] + src_ptr[src_stride * 3 + 3] +
8) >> 4;
src_ptr += 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* src_ptr, int,
uint8* dst, int dst_width) {
for (int x = 0; x < dst_width; ++x) {
*dst++ = *src_ptr;
src_ptr += 8;
}
}
// Note calling code checks width is less than max and if not
// uses ScaleRowDown8_C instead.
static void ScaleRowDown8Int_C(const uint8* src_ptr, int src_stride,
uint8* dst, int dst_width) {
ALIGN16(uint8 src_row[kMaxRow12 * 2]);
assert(dst_width <= kMaxOutputWidth);
ScaleRowDown4Int_C(src_ptr, src_stride, src_row, dst_width * 2);
ScaleRowDown4Int_C(src_ptr + src_stride * 4, src_stride,
src_row + kMaxOutputWidth,
dst_width * 2);
ScaleRowDown2Int_C(src_row, kMaxOutputWidth, dst, dst_width);
}
static void ScaleRowDown34_C(const uint8* src_ptr, int,
uint8* dst, int dst_width) {
assert((dst_width % 3 == 0) && (dst_width > 0));
uint8* dend = dst + dst_width;
do {
dst[0] = src_ptr[0];
dst[1] = src_ptr[1];
dst[2] = src_ptr[3];
dst += 3;
src_ptr += 4;
} while (dst < dend);
}
// Filter rows 0 and 1 together, 3 : 1
static void ScaleRowDown34_0_Int_C(const uint8* src_ptr, int src_stride,
uint8* d, int dst_width) {
assert((dst_width % 3 == 0) && (dst_width > 0));
uint8* dend = d + dst_width;
const uint8* s = src_ptr;
const uint8* t = src_ptr + src_stride;
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* src_ptr, int src_stride,
uint8* d, int dst_width) {
assert((dst_width % 3 == 0) && (dst_width > 0));
uint8* dend = d + dst_width;
const uint8* s = src_ptr;
const uint8* t = src_ptr + src_stride;
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* dst_ptr, const uint8* src_ptr,
int dst_width) {
assert((dst_width % 3 == 0) && (dst_width > 0));
uint8* dend = dst_ptr + dst_width;
const uint8* s = src_ptr;
do {
dst_ptr[0] = (s[0] * 3 + s[1] * 1 + 2) >> 2;
dst_ptr[1] = (s[1] * 1 + s[2] * 1 + 1) >> 1;
dst_ptr[2] = (s[2] * 1 + s[3] * 3 + 2) >> 2;
dst_ptr += 3;
s += 4;
} while (dst_ptr < dend);
}
#endif
static void ScaleFilterCols_C(uint8* dst_ptr, const uint8* src_ptr,
int dst_width, int dx) {
int x = 0;
for (int j = 0; j < dst_width; ++j) {
int xi = x >> 16;
int xf1 = x & 0xffff;
int xf0 = 65536 - xf1;
*dst_ptr++ = (src_ptr[xi] * xf0 + src_ptr[xi + 1] * xf1) >> 16;
x += dx;
}
}
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* src_ptr, int src_stride,
uint8* dst_ptr, int dst_width) {
assert((dst_width % 3 == 0) && (dst_width > 0));
ALIGN16(uint8 row[kMaxInputWidth]);
ScaleFilterRows_SSE2(row, src_ptr, src_stride, dst_width * 4 / 3,
256 / 4);
ScaleFilterCols34_C(dst_ptr, row, dst_width);
}
// Filter rows 1 and 2 together, 1 : 1
static void ScaleRowDown34_1_Int_SSE2(const uint8* src_ptr, int src_stride,
uint8* dst_ptr, int dst_width) {
assert((dst_width % 3 == 0) && (dst_width > 0));
ALIGN16(uint8 row[kMaxInputWidth]);
ScaleFilterRows_SSE2(row, src_ptr, src_stride, dst_width * 4 / 3, 256 / 2);
ScaleFilterCols34_C(dst_ptr, row, dst_width);
}
#endif
static void ScaleRowDown38_C(const uint8* src_ptr, int,
uint8* dst, int dst_width) {
assert(dst_width % 3 == 0);
for (int x = 0; x < dst_width; x += 3) {
dst[0] = src_ptr[0];
dst[1] = src_ptr[3];
dst[2] = src_ptr[6];
dst += 3;
src_ptr += 8;
}
}
// 8x3 -> 3x1
static void ScaleRowDown38_3_Int_C(const uint8* src_ptr, int src_stride,
uint8* dst_ptr, int dst_width) {
assert((dst_width % 3 == 0) && (dst_width > 0));
for (int i = 0; i < dst_width; i+=3) {
dst_ptr[0] = (src_ptr[0] + src_ptr[1] + src_ptr[2] +
src_ptr[src_stride + 0] + src_ptr[src_stride + 1] +
src_ptr[src_stride + 2] + src_ptr[src_stride * 2 + 0] +
src_ptr[src_stride * 2 + 1] + src_ptr[src_stride * 2 + 2]) *
(65536 / 9) >> 16;
dst_ptr[1] = (src_ptr[3] + src_ptr[4] + src_ptr[5] +
src_ptr[src_stride + 3] + src_ptr[src_stride + 4] +
src_ptr[src_stride + 5] + src_ptr[src_stride * 2 + 3] +
src_ptr[src_stride * 2 + 4] + src_ptr[src_stride * 2 + 5]) *
(65536 / 9) >> 16;
dst_ptr[2] = (src_ptr[6] + src_ptr[7] +
src_ptr[src_stride + 6] + src_ptr[src_stride + 7] +
src_ptr[src_stride * 2 + 6] + src_ptr[src_stride * 2 + 7]) *
(65536 / 6) >> 16;
src_ptr += 8;
dst_ptr += 3;
}
}
// 8x2 -> 3x1
static void ScaleRowDown38_2_Int_C(const uint8* src_ptr, int src_stride,
uint8* dst_ptr, int dst_width) {
assert((dst_width % 3 == 0) && (dst_width > 0));
for (int i = 0; i < dst_width; i+=3) {
dst_ptr[0] = (src_ptr[0] + src_ptr[1] + src_ptr[2] +
src_ptr[src_stride + 0] + src_ptr[src_stride + 1] +
src_ptr[src_stride + 2]) * (65536 / 6) >> 16;
dst_ptr[1] = (src_ptr[3] + src_ptr[4] + src_ptr[5] +
src_ptr[src_stride + 3] + src_ptr[src_stride + 4] +
src_ptr[src_stride + 5]) * (65536 / 6) >> 16;
dst_ptr[2] = (src_ptr[6] + src_ptr[7] +
src_ptr[src_stride + 6] + src_ptr[src_stride + 7]) *
(65536 / 4) >> 16;
src_ptr += 8;
dst_ptr += 3;
}
}
// C version 8x2 -> 8x1
static void ScaleFilterRows_C(uint8* dst_ptr,
const uint8* src_ptr, int src_stride,
int dst_width, int source_y_fraction) {
assert(dst_width > 0);
int y1_fraction = source_y_fraction;
int y0_fraction = 256 - y1_fraction;
const uint8* src_ptr1 = src_ptr + src_stride;
uint8* end = dst_ptr + dst_width;
do {
dst_ptr[0] = (src_ptr[0] * y0_fraction + src_ptr1[0] * y1_fraction) >> 8;
dst_ptr[1] = (src_ptr[1] * y0_fraction + src_ptr1[1] * y1_fraction) >> 8;
dst_ptr[2] = (src_ptr[2] * y0_fraction + src_ptr1[2] * y1_fraction) >> 8;
dst_ptr[3] = (src_ptr[3] * y0_fraction + src_ptr1[3] * y1_fraction) >> 8;
dst_ptr[4] = (src_ptr[4] * y0_fraction + src_ptr1[4] * y1_fraction) >> 8;
dst_ptr[5] = (src_ptr[5] * y0_fraction + src_ptr1[5] * y1_fraction) >> 8;
dst_ptr[6] = (src_ptr[6] * y0_fraction + src_ptr1[6] * y1_fraction) >> 8;
dst_ptr[7] = (src_ptr[7] * y0_fraction + src_ptr1[7] * y1_fraction) >> 8;
src_ptr += 8;
src_ptr1 += 8;
dst_ptr += 8;
} while (dst_ptr < end);
dst_ptr[0] = dst_ptr[-1];
}
void ScaleAddRows_C(const uint8* src_ptr, int src_stride,
uint16* dst_ptr, int src_width, int src_height) {
assert(src_width > 0);
assert(src_height > 0);
for (int x = 0; x < src_width; ++x) {
const uint8* s = src_ptr + x;
int sum = 0;
for (int y = 0; y < src_height; ++y) {
sum += s[0];
s += src_stride;
}
dst_ptr[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(int src_width, int src_height,
int dst_width, int dst_height,
int src_stride, int dst_stride,
const uint8* src_ptr, uint8* dst_ptr,
FilterMode filtering) {
assert(src_width % 2 == 0);
assert(src_height % 2 == 0);
void (*ScaleRowDown2)(const uint8* src_ptr, int src_stride,
uint8* dst_ptr, int dst_width);
#if defined(HAS_SCALEROWDOWN2_NEON)
if (libyuv::TestCpuFlag(libyuv::kCpuHasNEON) &&
(dst_width % 16 == 0) && (src_stride % 16 == 0) &&
(dst_stride % 16 == 0) &&
IS_ALIGNED(src_ptr, 16) && IS_ALIGNED(dst_ptr, 16)) {
ScaleRowDown2 = filtering ? ScaleRowDown2Int_NEON : ScaleRowDown2_NEON;
} else
#endif
#if defined(HAS_SCALEROWDOWN2_SSE2)
if (libyuv::TestCpuFlag(libyuv::kCpuHasSSE2) &&
(dst_width % 16 == 0) && IS_ALIGNED(src_ptr, 16) &&
IS_ALIGNED(dst_ptr, 16)) {
ScaleRowDown2 = filtering ? ScaleRowDown2Int_SSE2 : ScaleRowDown2_SSE2;
} else
#endif
{
ScaleRowDown2 = filtering ? ScaleRowDown2Int_C : ScaleRowDown2_C;
}
for (int y = 0; y < dst_height; ++y) {
ScaleRowDown2(src_ptr, src_stride, dst_ptr, dst_width);
src_ptr += (src_stride << 1);
dst_ptr += dst_stride;
}
}
/**
* Scale plane, 1/4
*
* This is an optimized version for scaling down a plane to 1/4 of
* its original size.
*/
static void ScalePlaneDown4(int src_width, int src_height,
int dst_width, int dst_height,
int src_stride, int dst_stride,
const uint8* src_ptr, uint8* dst_ptr,
FilterMode filtering) {
assert(src_width % 4 == 0);
assert(src_height % 4 == 0);
void (*ScaleRowDown4)(const uint8* src_ptr, int src_stride,
uint8* dst_ptr, int dst_width);
#if defined(HAS_SCALEROWDOWN4_NEON)
if (libyuv::TestCpuFlag(libyuv::kCpuHasNEON) &&
(dst_width % 2 == 0) && (src_stride % 8 == 0) &&
IS_ALIGNED(src_ptr, 8)) {
ScaleRowDown4 = filtering ? ScaleRowDown4Int_NEON : ScaleRowDown4_NEON;
} else
#endif
#if defined(HAS_SCALEROWDOWN4_SSE2)
if (libyuv::TestCpuFlag(libyuv::kCpuHasSSE2) &&
(dst_width % 8 == 0) && (src_stride % 16 == 0) &&
(dst_stride % 8 == 0) &&
IS_ALIGNED(src_ptr, 16) && IS_ALIGNED(dst_ptr, 8)) {
ScaleRowDown4 = filtering ? ScaleRowDown4Int_SSE2 : ScaleRowDown4_SSE2;
} else
#endif
{
ScaleRowDown4 = filtering ? ScaleRowDown4Int_C : ScaleRowDown4_C;
}
for (int y = 0; y < dst_height; ++y) {
ScaleRowDown4(src_ptr, src_stride, dst_ptr, dst_width);
src_ptr += (src_stride << 2);
dst_ptr += dst_stride;
}
}
/**
* Scale plane, 1/8
*
* This is an optimized version for scaling down a plane to 1/8
* of its original size.
*
*/
static void ScalePlaneDown8(int src_width, int src_height,
int dst_width, int dst_height,
int src_stride, int dst_stride,
const uint8* src_ptr, uint8* dst_ptr,
FilterMode filtering) {
assert(src_width % 8 == 0);
assert(src_height % 8 == 0);
void (*ScaleRowDown8)(const uint8* src_ptr, int src_stride,
uint8* dst_ptr, int dst_width);
#if defined(HAS_SCALEROWDOWN8_SSE2)
if (libyuv::TestCpuFlag(libyuv::kCpuHasSSE2) &&
(dst_width % 16 == 0) && dst_width <= kMaxOutputWidth &&
(src_stride % 16 == 0) && (dst_stride % 16 == 0) &&
IS_ALIGNED(src_ptr, 16) && IS_ALIGNED(dst_ptr, 16)) {
ScaleRowDown8 = filtering ? ScaleRowDown8Int_SSE2 : ScaleRowDown8_SSE2;
} else
#endif
{
ScaleRowDown8 = filtering && (dst_width <= kMaxOutputWidth) ?
ScaleRowDown8Int_C : ScaleRowDown8_C;
}
for (int y = 0; y < dst_height; ++y) {
ScaleRowDown8(src_ptr, src_stride, dst_ptr, dst_width);
src_ptr += (src_stride << 3);
dst_ptr += dst_stride;
}
}
/**
* Scale plane down, 3/4
*
* Provided by Frank Barchard (fbarchard@google.com)
*
*/
static void ScalePlaneDown34(int src_width, int src_height,
int dst_width, int dst_height,
int src_stride, int dst_stride,
const uint8* src_ptr, uint8* dst_ptr,
FilterMode filtering) {
assert(dst_width % 3 == 0);
void (*ScaleRowDown34_0)(const uint8* src_ptr, int src_stride,
uint8* dst_ptr, int dst_width);
void (*ScaleRowDown34_1)(const uint8* src_ptr, int src_stride,
uint8* dst_ptr, int dst_width);
#if defined(HAS_SCALEROWDOWN34_SSSE3)
if (libyuv::TestCpuFlag(libyuv::kCpuHasSSSE3) &&
(dst_width % 24 == 0) && (src_stride % 16 == 0) &&
(dst_stride % 8 == 0) &&
IS_ALIGNED(src_ptr, 16) && IS_ALIGNED(dst_ptr, 8)) {
if (!filtering) {
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::TestCpuFlag(libyuv::kCpuHasSSE2) &&
(dst_width % 24 == 0) && (src_stride % 16 == 0) &&
(dst_stride % 8 == 0) &&
IS_ALIGNED(src_ptr, 16) && IS_ALIGNED(dst_ptr, 8) &&
filtering) {
ScaleRowDown34_0 = ScaleRowDown34_0_Int_SSE2;
ScaleRowDown34_1 = ScaleRowDown34_1_Int_SSE2;
} else
#endif
{
if (!filtering) {
ScaleRowDown34_0 = ScaleRowDown34_C;
ScaleRowDown34_1 = ScaleRowDown34_C;
} else {
ScaleRowDown34_0 = ScaleRowDown34_0_Int_C;
ScaleRowDown34_1 = ScaleRowDown34_1_Int_C;
}
}
int src_row = 0;
for (int y = 0; y < dst_height; ++y) {
switch (src_row) {
case 0:
ScaleRowDown34_0(src_ptr, src_stride, dst_ptr, dst_width);
break;
case 1:
ScaleRowDown34_1(src_ptr, src_stride, dst_ptr, dst_width);
break;
case 2:
ScaleRowDown34_0(src_ptr + src_stride, -src_stride,
dst_ptr, dst_width);
break;
}
++src_row;
src_ptr += src_stride;
dst_ptr += dst_stride;
if (src_row >= 3) {
src_ptr += src_stride;
src_row = 0;
}
}
}
/**
* 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(int src_width, int src_height,
int dst_width, int dst_height,
int src_stride, int dst_stride,
const uint8* src_ptr, uint8* dst_ptr,
FilterMode filtering) {
assert(dst_width % 3 == 0);
void (*ScaleRowDown38_3)(const uint8* src_ptr, int src_stride,
uint8* dst_ptr, int dst_width);
void (*ScaleRowDown38_2)(const uint8* src_ptr, int src_stride,
uint8* dst_ptr, int dst_width);
#if defined(HAS_SCALEROWDOWN38_SSSE3)
if (libyuv::TestCpuFlag(libyuv::kCpuHasSSSE3) &&
(dst_width % 24 == 0) && (src_stride % 16 == 0) &&
(dst_stride % 8 == 0) &&
IS_ALIGNED(src_ptr, 16) && IS_ALIGNED(dst_ptr, 8)) {
if (!filtering) {
ScaleRowDown38_3 = ScaleRowDown38_SSSE3;
ScaleRowDown38_2 = ScaleRowDown38_SSSE3;
} else {
ScaleRowDown38_3 = ScaleRowDown38_3_Int_SSSE3;
ScaleRowDown38_2 = ScaleRowDown38_2_Int_SSSE3;
}
} else
#endif
{
if (!filtering) {
ScaleRowDown38_3 = ScaleRowDown38_C;
ScaleRowDown38_2 = ScaleRowDown38_C;
} else {
ScaleRowDown38_3 = ScaleRowDown38_3_Int_C;
ScaleRowDown38_2 = ScaleRowDown38_2_Int_C;
}
}
int src_row = 0;
for (int y = 0; y < dst_height; ++y) {
switch (src_row) {
case 0:
case 1:
ScaleRowDown38_3(src_ptr, src_stride, dst_ptr, dst_width);
src_ptr += src_stride * 3;
++src_row;
break;
case 2:
ScaleRowDown38_2(src_ptr, src_stride, dst_ptr, dst_width);
src_ptr += src_stride * 2;
src_row = 0;
break;
}
dst_ptr += dst_stride;
}
}
inline static uint32 SumBox(int iboxwidth, int iboxheight,
int src_stride, const uint8* src_ptr) {
assert(iboxwidth > 0);
assert(iboxheight > 0);
uint32 sum = 0u;
for (int y = 0; y < iboxheight; ++y) {
for (int x = 0; x < iboxwidth; ++x) {
sum += src_ptr[x];
}
src_ptr += src_stride;
}
return sum;
}
static void ScalePlaneBoxRow(int dst_width, int boxheight,
int dx, int src_stride,
const uint8* src_ptr, uint8* dst_ptr) {
int x = 0;
for (int i = 0; i < dst_width; ++i) {
int ix = x >> 16;
x += dx;
int boxwidth = (x >> 16) - ix;
*dst_ptr++ = SumBox(boxwidth, boxheight, src_stride, src_ptr + ix) /
(boxwidth * boxheight);
}
}
inline static uint32 SumPixels(int iboxwidth, const uint16* src_ptr) {
assert(iboxwidth > 0);
uint32 sum = 0u;
for (int x = 0; x < iboxwidth; ++x) {
sum += src_ptr[x];
}
return sum;
}
static void ScaleAddCols2_C(int dst_width, int boxheight, int dx,
const uint16* src_ptr, uint8* dst_ptr) {
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 < dst_width; ++i) {
int ix = x >> 16;
x += dx;
int boxwidth = (x >> 16) - ix;
*dst_ptr++ = SumPixels(boxwidth, src_ptr + ix) * scaleptr[boxwidth] >> 16;
}
}
static void ScaleAddCols1_C(int dst_width, int boxheight, int dx,
const uint16* src_ptr, uint8* dst_ptr) {
int boxwidth = (dx >> 16);
int scaleval = 65536 / (boxwidth * boxheight);
int x = 0;
for (int i = 0; i < dst_width; ++i) {
*dst_ptr++ = SumPixels(boxwidth, src_ptr + 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(int src_width, int src_height,
int dst_width, int dst_height,
int src_stride, int dst_stride,
const uint8* src_ptr, uint8* dst_ptr) {
assert(dst_width > 0);
assert(dst_height > 0);
int dy = (src_height << 16) / dst_height;
int dx = (src_width << 16) / dst_width;
if ((src_width % 16 != 0) || (src_width > kMaxInputWidth) ||
dst_height * 2 > src_height) {
uint8* dst = dst_ptr;
int dy = (src_height << 16) / dst_height;
int dx = (src_width << 16) / dst_width;
int y = 0;
for (int j = 0; j < dst_height; ++j) {
int iy = y >> 16;
const uint8* const src = src_ptr + iy * src_stride;
y += dy;
if (y > (src_height << 16)) {
y = (src_height << 16);
}
int boxheight = (y >> 16) - iy;
ScalePlaneBoxRow(dst_width, boxheight,
dx, src_stride,
src, dst);
dst += dst_stride;
}
} else {
ALIGN16(uint16 row[kMaxInputWidth]);
void (*ScaleAddRows)(const uint8* src_ptr, int src_stride,
uint16* dst_ptr, int src_width, int src_height);
void (*ScaleAddCols)(int dst_width, int boxheight, int dx,
const uint16* src_ptr, uint8* dst_ptr);
#if defined(HAS_SCALEADDROWS_SSE2)
if (libyuv::TestCpuFlag(libyuv::kCpuHasSSE2) &&
(src_stride % 16 == 0) && IS_ALIGNED(src_ptr, 16) &&
(src_width % 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 < dst_height; ++j) {
int iy = y >> 16;
const uint8* const src = src_ptr + iy * src_stride;
y += dy;
if (y > (src_height << 16)) {
y = (src_height << 16);
}
int boxheight = (y >> 16) - iy;
ScaleAddRows(src, src_stride, row, src_width, boxheight);
ScaleAddCols(dst_width, boxheight, dx, row, dst_ptr);
dst_ptr += dst_stride;
}
}
}
/**
* Scale plane to/from any dimensions, with interpolation.
*/
static void ScalePlaneBilinearSimple(int src_width, int src_height,
int dst_width, int dst_height,
int src_stride, int dst_stride,
const uint8* src_ptr, uint8* dst_ptr) {
uint8* dst = dst_ptr;
int dx = (src_width << 16) / dst_width;
int dy = (src_height << 16) / dst_height;
int maxx = ((src_width - 1) << 16) - 1;
int maxy = ((src_height - 1) << 16) - 1;
int y = (dst_height < src_height) ? 32768 :
(src_height << 16) / dst_height - 32768;
for (int i = 0; i < dst_height; ++i) {
int cy = (y < 0) ? 0 : y;
int yi = cy >> 16;
int yf = cy & 0xffff;
const uint8* const src = src_ptr + yi * src_stride;
int x = (dst_width < src_width) ? 32768 :
(src_width << 16) / dst_width - 32768;
for (int j = 0; j < dst_width; ++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 + src_stride] * (65536 - xf) +
src[xi + src_stride + 1] * xf) >> 16;
*dst++ = (r0 * (65536 - yf) + r1 * yf) >> 16;
x += dx;
if (x > maxx)
x = maxx;
}
dst += dst_stride - dst_width;
y += dy;
if (y > maxy)
y = maxy;
}
}
/**
* Scale plane to/from any dimensions, with bilinear
* interpolation.
*/
static void ScalePlaneBilinear(int src_width, int src_height,
int dst_width, int dst_height,
int src_stride, int dst_stride,
const uint8* src_ptr, uint8* dst_ptr) {
assert(dst_width > 0);
assert(dst_height > 0);
int dy = (src_height << 16) / dst_height;
int dx = (src_width << 16) / dst_width;
if ((src_width % 8 != 0) || (src_width > kMaxInputWidth)) {
ScalePlaneBilinearSimple(src_width, src_height, dst_width, dst_height,
src_stride, dst_stride, src_ptr, dst_ptr);
} else {
ALIGN16(uint8 row[kMaxInputWidth + 1]);
void (*ScaleFilterRows)(uint8* dst_ptr, const uint8* src_ptr,
int src_stride,
int dst_width, int source_y_fraction);
void (*ScaleFilterCols)(uint8* dst_ptr, const uint8* src_ptr,
int dst_width, int dx);
#if defined(HAS_SCALEFILTERROWS_SSSE3)
if (libyuv::TestCpuFlag(libyuv::kCpuHasSSSE3) &&
(src_stride % 16 == 0) && IS_ALIGNED(src_ptr, 16) &&
(src_width % 16) == 0) {
ScaleFilterRows = ScaleFilterRows_SSSE3;
} else
#endif
#if defined(HAS_SCALEFILTERROWS_SSE2)
if (libyuv::TestCpuFlag(libyuv::kCpuHasSSE2) &&
(src_stride % 16 == 0) && IS_ALIGNED(src_ptr, 16) &&
(src_width % 16) == 0) {
ScaleFilterRows = ScaleFilterRows_SSE2;
} else
#endif
{
ScaleFilterRows = ScaleFilterRows_C;
}
ScaleFilterCols = ScaleFilterCols_C;
int y = 0;
int maxy = ((src_height - 1) << 16) - 1; // max is filter of last 2 rows.
for (int j = 0; j < dst_height; ++j) {
int iy = y >> 16;
int fy = (y >> 8) & 255;
const uint8* const src = src_ptr + iy * src_stride;
ScaleFilterRows(row, src, src_stride, src_width, fy);
ScaleFilterCols(dst_ptr, row, dst_width, dx);
dst_ptr += dst_stride;
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(int src_width, int src_height,
int dst_width, int dst_height,
int src_stride, int dst_stride,
const uint8* src_ptr, uint8* dst_ptr) {
uint8* dst = dst_ptr;
int dx = (src_width << 16) / dst_width;
for (int y = 0; y < dst_height; ++y) {
const uint8* const src = src_ptr + (y * src_height / dst_height) *
src_stride;
// TODO(fbarchard): Round X coordinate by setting x=0x8000.
int x = 0;
for (int i = 0; i < dst_width; ++i) {
*dst++ = src[x >> 16];
x += dx;
}
dst += dst_stride - dst_width;
}
}
/**
* Scale plane to/from any dimensions.
*/
static void ScalePlaneAnySize(int src_width, int src_height,
int dst_width, int dst_height,
int src_stride, int dst_stride,
const uint8* src_ptr, uint8* dst_ptr,
FilterMode filtering) {
if (!filtering) {
ScalePlaneSimple(src_width, src_height, dst_width, dst_height,
src_stride, dst_stride, src_ptr, dst_ptr);
} else {
// fall back to non-optimized version
ScalePlaneBilinear(src_width, src_height, dst_width, dst_height,
src_stride, dst_stride, src_ptr, dst_ptr);
}
}
/**
* 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(int src_width, int src_height,
int dst_width, int dst_height,
int src_stride, int dst_stride,
const uint8* src_ptr, uint8* dst_ptr,
FilterMode filtering) {
if (!filtering) {
ScalePlaneSimple(src_width, src_height, dst_width, dst_height,
src_stride, dst_stride, src_ptr, dst_ptr);
} else if (filtering == kFilterBilinear || src_height * 2 > dst_height) {
// between 1/2x and 1x use bilinear
ScalePlaneBilinear(src_width, src_height, dst_width, dst_height,
src_stride, dst_stride, src_ptr, dst_ptr);
} else {
ScalePlaneBox(src_width, src_height, dst_width, dst_height,
src_stride, dst_stride, src_ptr, dst_ptr);
}
}
/**
* 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(int src_width, int src_height,
int dst_width, int dst_height,
int src_stride, int dst_stride,
const uint8* src_ptr, uint8* dst_ptr) {
if (src_stride == src_width && dst_stride == dst_width) {
// All contiguous, so can use REALLY fast path.
memcpy(dst_ptr, src_ptr, src_width * src_height);
} else {
// Not all contiguous; must copy scanlines individually
const uint8* src = src_ptr;
uint8* dst = dst_ptr;
for (int i = 0; i < src_height; ++i) {
memcpy(dst, src, src_width);
dst += dst_stride;
src += src_stride;
}
}
}
static void ScalePlane(const uint8* src, int src_stride,
int src_width, int src_height,
uint8* dst, int dst_stride,
int dst_width, int dst_height,
FilterMode filtering, bool use_ref) {
// Use specialized scales to improve performance for common resolutions.
// For example, all the 1/2 scalings will use ScalePlaneDown2()
if (dst_width == src_width && dst_height == src_height) {
// Straight copy.
CopyPlane(src_width, src_height, dst_width, dst_height, src_stride,
dst_stride, src, dst);
} else if (dst_width <= src_width && dst_height <= src_height) {
// Scale down.
if (use_ref) {
// For testing, allow the optimized versions to be disabled.
ScalePlaneDown(src_width, src_height, dst_width, dst_height,
src_stride, dst_stride, src, dst, filtering);
} else if (4 * dst_width == 3 * src_width &&
4 * dst_height == 3 * src_height) {
// optimized, 3/4
ScalePlaneDown34(src_width, src_height, dst_width, dst_height,
src_stride, dst_stride, src, dst, filtering);
} else if (2 * dst_width == src_width && 2 * dst_height == src_height) {
// optimized, 1/2
ScalePlaneDown2(src_width, src_height, dst_width, dst_height,
src_stride, dst_stride, src, dst, filtering);
// 3/8 rounded up for odd sized chroma height.
} else if (8 * dst_width == 3 * src_width &&
dst_height == ((src_height * 3 + 7) / 8)) {
// optimized, 3/8
ScalePlaneDown38(src_width, src_height, dst_width, dst_height,
src_stride, dst_stride, src, dst, filtering);
} else if (4 * dst_width == src_width && 4 * dst_height == src_height) {
// optimized, 1/4
ScalePlaneDown4(src_width, src_height, dst_width, dst_height,
src_stride, dst_stride, src, dst, filtering);
} else if (8 * dst_width == src_width && 8 * dst_height == src_height) {
// optimized, 1/8
ScalePlaneDown8(src_width, src_height, dst_width, dst_height,
src_stride, dst_stride, src, dst, filtering);
} else {
// Arbitrary downsample
ScalePlaneDown(src_width, src_height, dst_width, dst_height,
src_stride, dst_stride, src, dst, filtering);
}
} else {
// Arbitrary scale up and/or down.
ScalePlaneAnySize(src_width, src_height, dst_width, dst_height,
src_stride, dst_stride, src, dst, filtering);
}
}
/**
* Scale a plane.
*
* This function in turn calls a scaling function
* suitable for handling the desired resolutions.
*
*/
int I420Scale(const uint8* src_y, int src_stride_y,
const uint8* src_u, int src_stride_u,
const uint8* src_v, int src_stride_v,
int src_width, int src_height,
uint8* dst_y, int dst_stride_y,
uint8* dst_u, int dst_stride_u,
uint8* dst_v, int dst_stride_v,
int dst_width, int dst_height,
FilterMode filtering) {
if (!src_y || !src_u || !src_v || src_width <= 0 || src_height == 0 ||
!dst_y || !dst_u || !dst_v || dst_width <= 0 || dst_height <= 0) {
return -1;
}
// Negative height means invert the image.
if (src_height < 0) {
src_height = -src_height;
int halfheight = (src_height + 1) >> 1;
src_y = src_y + (src_height - 1) * src_stride_y;
src_u = src_u + (halfheight - 1) * src_stride_u;
src_v = src_v + (halfheight - 1) * src_stride_v;
src_stride_y = -src_stride_y;
src_stride_u = -src_stride_u;
src_stride_v = -src_stride_v;
}
int halfsrc_width = (src_width + 1) >> 1;
int halfsrc_height = (src_height + 1) >> 1;
int halfdst_width = (dst_width + 1) >> 1;
int halfoheight = (dst_height + 1) >> 1;
ScalePlane(src_y, src_stride_y, src_width, src_height,
dst_y, dst_stride_y, dst_width, dst_height,
filtering, use_reference_impl_);
ScalePlane(src_u, src_stride_u, halfsrc_width, halfsrc_height,
dst_u, dst_stride_u, halfdst_width, halfoheight,
filtering, use_reference_impl_);
ScalePlane(src_v, src_stride_v, halfsrc_width, halfsrc_height,
dst_v, dst_stride_v, halfdst_width, halfoheight,
filtering, use_reference_impl_);
return 0;
}
int Scale(const uint8* src_y, const uint8* src_u, const uint8* src_v,
int src_stride_y, int src_stride_u, int src_stride_v,
int src_width, int src_height,
uint8* dst_y, uint8* dst_u, uint8* dst_v,
int dst_stride_y, int dst_stride_u, int dst_stride_v,
int dst_width, int dst_height,
bool interpolate) {
if (!src_y || !src_u || !src_v || src_width <= 0 || src_height == 0 ||
!dst_y || !dst_u || !dst_v || dst_width <= 0 || dst_height <= 0) {
return -1;
}
// Negative height means invert the image.
if (src_height < 0) {
src_height = -src_height;
int halfheight = (src_height + 1) >> 1;
src_y = src_y + (src_height - 1) * src_stride_y;
src_u = src_u + (halfheight - 1) * src_stride_u;
src_v = src_v + (halfheight - 1) * src_stride_v;
src_stride_y = -src_stride_y;
src_stride_u = -src_stride_u;
src_stride_v = -src_stride_v;
}
int halfsrc_width = (src_width + 1) >> 1;
int halfsrc_height = (src_height + 1) >> 1;
int halfdst_width = (dst_width + 1) >> 1;
int halfoheight = (dst_height + 1) >> 1;
FilterMode filtering = interpolate ? kFilterBox : kFilterNone;
ScalePlane(src_y, src_stride_y, src_width, src_height,
dst_y, dst_stride_y, dst_width, dst_height,
filtering, use_reference_impl_);
ScalePlane(src_u, src_stride_u, halfsrc_width, halfsrc_height,
dst_u, dst_stride_u, halfdst_width, halfoheight,
filtering, use_reference_impl_);
ScalePlane(src_v, src_stride_v, halfsrc_width, halfsrc_height,
dst_v, dst_stride_v, halfdst_width, halfoheight,
filtering, use_reference_impl_);
return 0;
}
int Scale(const uint8* src, int src_width, int src_height,
uint8* dst, int dst_width, int dst_height, int ooffset,
bool interpolate) {
if (!src || src_width <= 0 || src_height <= 0 ||
!dst || dst_width <= 0 || dst_height <= 0 || ooffset < 0 ||
ooffset >= dst_height) {
return -1;
}
ooffset = ooffset & ~1; // chroma requires offset to multiple of 2.
int halfsrc_width = (src_width + 1) >> 1;
int halfsrc_height = (src_height + 1) >> 1;
int halfdst_width = (dst_width + 1) >> 1;
int halfoheight = (dst_height + 1) >> 1;
int aheight = dst_height - ooffset * 2; // actual output height
const uint8* const iyptr = src;
uint8* oyptr = dst + ooffset * dst_width;
const uint8* const iuptr = src + src_width * src_height;
uint8* ouptr = dst + dst_width * dst_height + (ooffset >> 1) * halfdst_width;
const uint8* const ivptr = src + src_width * src_height +
halfsrc_width * halfsrc_height;
uint8* ovptr = dst + dst_width * dst_height + halfdst_width * halfoheight +
(ooffset >> 1) * halfdst_width;
return Scale(iyptr, iuptr, ivptr, src_width, halfsrc_width, halfsrc_width,
src_width, src_height, oyptr, ouptr, ovptr, dst_width,
halfdst_width, halfdst_width, dst_width, aheight, interpolate);
}
} // namespace libyuv