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clang on linux prefers no args for rep movsl/stosl. ifdef for C that removes namespace. extern c allows c++ to be used to compile, including with namespace, but C program can link libyuv

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BUG=none
TEST=none
Review URL: http://webrtc-codereview.appspot.com/320004

git-svn-id: http://libyuv.googlecode.com/svn/trunk@101 16f28f9a-4ce2-e073-06de-1de4eb20be90
This commit is contained in:
fbarchard@google.com 2011-12-10 07:45:58 +00:00
parent abe1613f51
commit fe5ff7ed54
26 changed files with 227 additions and 125 deletions
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2
README.chromium
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@ -1,6 +1,6 @@
Name: libyuv
URL: http://code.google.com/p/libyuv/
Version: 99
Version: 101
License: BSD
License File: LICENSE

2
include/libyuv/basic_types.h
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@ -13,7 +13,7 @@
#include <stddef.h> // for NULL, size_t
#ifndef WIN32
#if !(defined(_MSC_VER) && (_MSC_VER < 1600))
#include <stdint.h> // for uintptr_t
#endif

8
include/libyuv/compare.h
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@ -13,10 +13,15 @@
#include "libyuv/basic_types.h"
#ifdef __cplusplus
namespace libyuv {
extern "C" {
#endif
static const int kMaxPsnr = 128;
double SumSquareErrorToPsnr(uint64 sse, uint64 count);
uint64 ComputeSumSquareError(const uint8 *src_a,
const uint8 *src_b, int count);
@ -48,6 +53,9 @@ double I420Ssim(const uint8 *src_y_a, int stride_y_a,
const uint8 *src_v_b, int stride_v_b,
int width, int height);
#ifdef __cplusplus
} // extern "C"
} // namespace libyuv
#endif
#endif // INCLUDE_LIBYUV_COMPARE_H_

6
include/libyuv/convert.h
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@ -14,7 +14,10 @@
#include "libyuv/basic_types.h"
#include "libyuv/rotate.h"
#ifdef __cplusplus
namespace libyuv {
extern "C" {
#endif
int I420ToRGB24(const uint8* src_y, int src_stride_y,
const uint8* src_u, int src_stride_u,
@ -130,6 +133,9 @@ int ConvertToI420(const uint8* src_frame, size_t src_size,
RotationMode rotation,
uint32 format);
#ifdef __cplusplus
} // extern "C"
} // namespace libyuv
#endif
#endif // INCLUDE_LIBYUV_CONVERT_H_

6
include/libyuv/cpu_id.h
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@ -11,7 +11,10 @@
#ifndef INCLUDE_LIBYUV_CPU_ID_H_
#define INCLUDE_LIBYUV_CPU_ID_H_
#ifdef __cplusplus
namespace libyuv {
extern "C" {
#endif
// These flags are only valid on x86 processors
static const int kCpuHasSSE2 = 1;
@ -38,6 +41,9 @@ static inline int TestCpuFlag(int test_flag) {
// 0 to disable all cpu specific optimizations.
void MaskCpuFlags(int enable_flags);
#ifdef __cplusplus
} // extern "C"
} // namespace libyuv
#endif
#endif // INCLUDE_LIBYUV_CPU_ID_H_

6
include/libyuv/format_conversion.h
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@ -13,7 +13,10 @@
#include "libyuv/basic_types.h"
#ifdef __cplusplus
namespace libyuv {
extern "C" {
#endif
// Converts any Bayer RGB format to I420.
int BayerRGBToI420(const uint8* src_bayer, int src_stride_bayer,
@ -35,6 +38,9 @@ int ARGBToBayerRGB(const uint8* src_rgb, int src_stride_rgb,
uint32 dst_fourcc_bayer,
int width, int height);
#ifdef __cplusplus
} // extern "C"
} // namespace libyuv
#endif
#endif // INCLUDE_LIBYUV_FORMATCONVERSION_H_

14
include/libyuv/planar_functions.h
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@ -13,7 +13,10 @@
#include "libyuv/basic_types.h"
#ifdef __cplusplus
namespace libyuv {
extern "C" {
#endif
// Copy I420 to I420.
int I420Copy(const uint8* src_y, int src_stride_y,
@ -68,14 +71,6 @@ int NV12ToI420(const uint8* src_y, int src_stride_y,
uint8* dst_v, int dst_stride_v,
int width, int height);
// Convert NV12 to I420. Deprecated.
int NV12ToI420(const uint8* src_y,
const uint8* src_uv, int src_stride,
uint8* dst_y, int dst_stride_y,
uint8* dst_u, int dst_stride_u,
uint8* dst_v, int dst_stride_v,
int width, int height);
// Convert Q420 to I420.
int Q420ToI420(const uint8* src_y, int src_stride_y,
const uint8* src_yuy2, int src_stride_yuy2,
@ -194,6 +189,9 @@ int ARGBCopy(const uint8* src_argb, int src_stride_argb,
uint8* dst_argb, int dst_stride_argb,
int width, int height);
#ifdef __cplusplus
} // extern "C"
} // namespace libyuv
#endif
#endif // INCLUDE_LIBYUV_PLANAR_FUNCTIONS_H_

6
include/libyuv/rotate.h
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@ -13,7 +13,10 @@
#include "libyuv/basic_types.h"
#ifdef __cplusplus
namespace libyuv {
extern "C" {
#endif
// Supported rotation
enum RotationMode {
@ -47,6 +50,9 @@ int NV12ToI420Rotate(const uint8* src_y, int src_stride_y,
int width, int height,
RotationMode mode);
#ifdef __cplusplus
} // extern "C"
} // namespace libyuv
#endif
#endif // INCLUDE_LIBYUV_ROTATE_H_

23
include/libyuv/scale.h
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@ -13,7 +13,10 @@
#include "libyuv/basic_types.h"
#ifdef __cplusplus
namespace libyuv {
extern "C" {
#endif
// Supported filtering
enum FilterMode {
@ -42,15 +45,7 @@ int I420Scale(const uint8* src_y, int src_stride_y,
int dst_width, int dst_height,
FilterMode filtering);
// Legacy API
// If dst_height_offset is non-zero, the image is offset by that many pixels
// and stretched to (dst_height - dst_height_offset * 2) pixels high,
// instead of dst_height.
int Scale(const uint8* src, int src_width, int src_height,
uint8* dst, int dst_width, int dst_height, int dst_height_offset,
bool interpolate);
// Same, but specified src terms of each plane location and stride.
// Legacy API. Deprecated
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,
@ -59,9 +54,17 @@ int Scale(const uint8* src_y, const uint8* src_u, const uint8* src_v,
int dst_width, int dst_height,
bool interpolate);
// Legacy API. Deprecated
int ScaleOffset(const uint8* src, int src_width, int src_height,
uint8* dst, int dst_width, int dst_height, int dst_yoffset,
bool interpolate);
// For testing, allow disabling of optimizations.
void SetUseReferenceImpl(bool use);
} // namespace libyuv
#ifdef __cplusplus
} // extern "C"
} // namespace libyuv
#endif
#endif // INCLUDE_LIBYUV_SCALE_H_

37
source/compare.cc
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@ -17,7 +17,10 @@
#include "libyuv/cpu_id.h"
#include "row.h"
#ifdef __cplusplus
namespace libyuv {
extern "C" {
#endif
#if defined(__ARM_NEON__) && !defined(YUV_DISABLE_ASM)
#define HAS_SUMSQUAREERROR_NEON
@ -222,23 +225,10 @@ uint64 ComputeSumSquareErrorPlane(const uint8* src_a, int stride_a,
return sse;
}
double Sse2Psnr(double samples, double sse) {
double psnr;
if (sse > 0.0)
psnr = 10.0 * log10(255.0 * 255.0 * samples / sse);
else
psnr = kMaxPsnr; // Limit to prevent divide by 0
if (psnr > kMaxPsnr)
psnr = kMaxPsnr;
return psnr;
}
double Sse2Psnr(uint64 samples, uint64 sse) {
double SumSquareErrorToPsnr(uint64 sse, uint64 count) {
double psnr;
if (sse > 0) {
double mse = static_cast<double>(samples) / static_cast<double>(sse);
double mse = static_cast<double>(count) / static_cast<double>(sse);
psnr = 10.0 * log10(255.0 * 255.0 * mse);
} else {
psnr = kMaxPsnr; // Limit to prevent divide by 0
@ -254,12 +244,10 @@ double CalcFramePsnr(const uint8* src_a, int stride_a,
const uint8* src_b, int stride_b,
int width, int height) {
const uint64 samples = width * height;
const uint64 sse = ComputeSumSquareErrorPlane(src_a, stride_a,
src_b, stride_b,
width, height);
return Sse2Psnr(samples, sse);
return SumSquareErrorToPsnr(sse, samples);
}
double I420Psnr(const uint8* src_y_a, int stride_y_a,
@ -272,22 +260,17 @@ double I420Psnr(const uint8* src_y_a, int stride_y_a,
const uint64 sse_y = ComputeSumSquareErrorPlane(src_y_a, stride_y_a,
src_y_b, stride_y_b,
width, height);
const int width_uv = (width + 1) >> 1;
const int height_uv = (height + 1) >> 1;
const uint64 sse_u = ComputeSumSquareErrorPlane(src_u_a, stride_u_a,
src_u_b, stride_u_b,
width_uv, height_uv);
const uint64 sse_v = ComputeSumSquareErrorPlane(src_v_a, stride_v_a,
src_v_b, stride_v_b,
width_uv, height_uv);
const uint64 samples = width * height + 2 * (width_uv * height_uv);
const uint64 sse = sse_y + sse_u + sse_v;
return Sse2Psnr(samples, sse);
return SumSquareErrorToPsnr(sse, samples);
}
static const int64 cc1 = 26634; // (64^2*(.01*255)^2
@ -374,18 +357,18 @@ double I420Ssim(const uint8* src_y_a, int stride_y_a,
int width, int height) {
const double ssim_y = CalcFrameSsim(src_y_a, stride_y_a,
src_y_b, stride_y_b, width, height);
const int width_uv = (width + 1) >> 1;
const int height_uv = (height + 1) >> 1;
const double ssim_u = CalcFrameSsim(src_u_a, stride_u_a,
src_u_b, stride_u_b,
width_uv, height_uv);
const double ssim_v = CalcFrameSsim(src_v_a, stride_v_a,
src_v_b, stride_v_b,
width_uv, height_uv);
return ssim_y * 0.8 + 0.1 * (ssim_u + ssim_v);
}
#ifdef __cplusplus
} // extern "C"
} // namespace libyuv
#endif

8
source/conversion_tables.h
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@ -18,7 +18,10 @@
#ifndef LIBYUV_SOURCE_CONVERSION_TABLES_H_
#define LIBYUV_SOURCE_CONVERSION_TABLES_H_
#ifdef __cplusplus
namespace libyuv {
extern "C" {
#endif
/******************************************************************************
* YUV TO RGB approximation
@ -197,7 +200,10 @@ namespace libyuv {
Vcg(244),Vcg(245),Vcg(246),Vcg(247),Vcg(248),Vcg(249),Vcg(250),Vcg(251),
Vcg(252),Vcg(253),Vcg(254),Vcg(255)};
} // namespace libyuv
#ifdef __cplusplus
} // extern "C"
} // namespace libyuv
#endif
#endif

8
source/convert.cc
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@ -25,7 +25,10 @@
#include "row.h"
#include "video_common.h"
#ifdef __cplusplus
namespace libyuv {
extern "C" {
#endif
static inline uint8 Clip(int32 val) {
if (val < 0) {
@ -1187,4 +1190,7 @@ int ConvertToI420(const uint8* sample, size_t sample_size,
return 0;
}
} // namespace libyuv
#ifdef __cplusplus
} // extern "C"
} // namespace libyuv
#endif

6
source/cpu_id.cc
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@ -40,7 +40,10 @@ static inline void __cpuid(int cpu_info[4], int info_type) {
}
#endif
#ifdef __cplusplus
namespace libyuv {
extern "C" {
#endif
// CPU detect function for SIMD instruction sets.
int cpu_info_ = 0;
@ -72,4 +75,7 @@ void MaskCpuFlags(int enable_flags) {
cpu_info_ = (cpu_info_ & enable_flags) | kCpuInitialized;
}
#ifdef __cplusplus
} // extern "C"
} // namespace libyuv
#endif

6
source/format_conversion.cc
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@ -15,7 +15,10 @@
#include "row.h"
#include "video_common.h"
#ifdef __cplusplus
namespace libyuv {
extern "C" {
#endif
// Note: to do this with Neon vld4.8 would load ARGB values into 4 registers
// and vst would select which 2 components to write. The low level would need
@ -430,4 +433,7 @@ int BayerRGBToI420(const uint8* src_bayer, int src_stride_bayer,
return 0;
}
#ifdef __cplusplus
} // extern "C"
} // namespace libyuv
#endif

29
source/planar_functions.cc
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@ -15,7 +15,10 @@
#include "libyuv/cpu_id.h"
#include "row.h"
#ifdef __cplusplus
namespace libyuv {
extern "C" {
#endif
#if defined(__ARM_NEON__) && !defined(YUV_DISABLE_ASM)
#define HAS_SPLITUV_NEON
@ -194,7 +197,7 @@ void CopyRow_X86(const uint8* src, uint8* dst, int width) {
size_t width_tmp = static_cast<size_t>(width);
asm volatile (
"shr $0x2,%2 \n"
"rep movsl (%0),(%1) \n"
"rep movsl \n"
: "+S"(src), // %0
"+D"(dst), // %1
"+c"(width_tmp) // %2
@ -715,22 +718,6 @@ int NV12ToI420(const uint8* src_y, int src_stride_y,
width, height);
}
// Convert NV12 to I420. Deprecated.
int NV12ToI420(const uint8* src_y,
const uint8* src_uv,
int src_stride_frame,
uint8* dst_y, int dst_stride_y,
uint8* dst_u, int dst_stride_u,
uint8* dst_v, int dst_stride_v,
int width, int height) {
return X420ToI420(src_y, src_stride_frame, src_stride_frame,
src_uv, src_stride_frame,
dst_y, dst_stride_y,
dst_u, dst_stride_u,
dst_v, dst_stride_v,
width, height);
}
#if defined(_M_IX86) && !defined(YUV_DISABLE_ASM)
#define HAS_SPLITYUY2_SSE2
__declspec(naked)
@ -1791,7 +1778,7 @@ static void SetRow8_X86(uint8* dst, uint32 v32, int width) {
size_t width_tmp = static_cast<size_t>(width);
asm volatile (
"shr $0x2,%1 \n"
"rep stos %2,(%0) \n"
"rep stosl \n"
: "+D"(dst), // %0
"+c"(width_tmp) // %1
: "a"(v32) // %2
@ -1805,7 +1792,7 @@ static void SetRows32_X86(uint8* dst, uint32 v32, int width,
size_t width_tmp = static_cast<size_t>(width);
uint32* d = reinterpret_cast<uint32*>(dst);
asm volatile (
"rep stos %2,(%0) \n"
"rep stosl \n"
: "+D"(d), // %0
"+c"(width_tmp) // %1
: "a"(v32) // %2
@ -1930,5 +1917,7 @@ int ARGBRect(uint8* dst_argb, int dst_stride_argb,
return 0;
}
#ifdef __cplusplus
} // extern "C"
} // namespace libyuv
#endif

17
source/rotate.cc
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@ -15,7 +15,10 @@
#include "rotate_priv.h"
#include "row.h"
#ifdef __cplusplus
namespace libyuv {
extern "C" {
#endif
#if (defined(_M_IX86) || defined(__x86_64__) || defined(__i386__)) && \
!defined(YUV_DISABLE_ASM)
@ -29,13 +32,13 @@ uvec8 kShuffleReverseUV = {
defined(__i386__)
#define DECLARE_FUNCTION(name) \
".text \n" \
".globl _" name " \n" \
"_" name ": \n"
".globl _" #name " \n" \
"_" #name ": \n"
#else
#define DECLARE_FUNCTION(name) \
".text \n" \
".global _" name " \n" \
name ": \n"
".global _" #name " \n" \
#name ": \n"
#endif
#endif
@ -1203,7 +1206,8 @@ int NV12ToI420Rotate(const uint8* src_y, int src_stride_y,
switch (mode) {
case kRotate0:
// copy frame
return NV12ToI420(src_y, src_uv, src_stride_y,
return NV12ToI420(src_y, src_stride_y,
src_uv, src_stride_uv,
dst_y, dst_stride_y,
dst_u, dst_stride_u,
dst_v, dst_stride_v,
@ -1241,4 +1245,7 @@ int NV12ToI420Rotate(const uint8* src_y, int src_stride_y,
return -1;
}
#ifdef __cplusplus
} // extern "C"
} // namespace libyuv
#endif

9
source/rotate_neon.cc
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@ -11,7 +11,10 @@
#include "libyuv/basic_types.h"
#include "row.h"
#ifdef __cplusplus
namespace libyuv {
extern "C" {
#endif
#if defined(__ARM_NEON__) && !defined(YUV_DISABLE_ASM)
@ -555,4 +558,8 @@ void TransposeUVWx8_NEON(const uint8* src, int src_stride,
);
}
#endif
}
#ifdef __cplusplus
} // extern "C"
} // namespace libyuv
#endif

6
source/rotate_priv.h
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@ -13,7 +13,10 @@
#include "libyuv/basic_types.h"
#ifdef __cplusplus
namespace libyuv {
extern "C" {
#endif
// Rotate planes by 90, 180, 270
void RotatePlane90(const uint8* src, int src_stride,
@ -59,6 +62,9 @@ void TransposeUV(const uint8* src, int src_stride,
uint8* dst_b, int dst_stride_b,
int width, int height);
#ifdef __cplusplus
} // extern "C"
} // namespace libyuv
#endif
#endif // SOURCE_ROTATE_PRIV_H_

6
source/row.h
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@ -72,7 +72,10 @@ void FastConvertYUVToABGRRow_NEON(const uint8* y_buf,
#define HAS_REVERSE_ROW_NEON
#endif
#ifdef __cplusplus
namespace libyuv {
extern "C" {
#endif
#ifdef HAS_ARGBTOYROW_SSSE3
void ARGBToYRow_SSSE3(const uint8* src_argb, uint8* dst_y, int pix);
@ -250,6 +253,9 @@ void FastConvertYToARGBRow_SSE2(const uint8* y_buf,
#endif
#ifdef __cplusplus
} // extern "C"
} // namespace libyuv
#endif
#endif // LIBYUV_SOURCE_ROW_H_

6
source/row_common.cc
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@ -12,7 +12,10 @@
#include "libyuv/basic_types.h"
#ifdef __cplusplus
namespace libyuv {
extern "C" {
#endif
void ABGRToARGBRow_C(const uint8* src_abgr, uint8* dst_argb, int pix) {
for (int x = 0; x < pix; ++x) {
@ -343,4 +346,7 @@ void ReverseRow_C(const uint8* src, uint8* dst, int width) {
}
}
#ifdef __cplusplus
} // extern "C"
} // namespace libyuv
#endif

10
source/row_neon.cc
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@ -10,6 +10,11 @@
#include "row.h"
#ifdef __cplusplus
namespace libyuv {
extern "C" {
#endif
#define YUVTORGB \
"vld1.u8 {d0}, [%0]! \n" \
"vld1.u32 {d2[0]}, [%1]! \n" \
@ -154,3 +159,8 @@ YUVTORGB
);
}
#endif
#ifdef __cplusplus
} // extern "C"
} // namespace libyuv
#endif

9
source/row_posix.cc
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@ -12,7 +12,10 @@
#include "libyuv/basic_types.h"
#ifdef __cplusplus
namespace libyuv {
extern "C" {
#endif
#ifdef HAS_ARGBTOUVROW_SSSE3
vec8 kARGBToU = {
@ -318,7 +321,6 @@ void ARGBToUVRow_SSSE3(const uint8* src_argb0, int src_stride_argb,
}
#endif
#ifdef HAS_FASTCONVERTYUVTOARGBROW_SSSE3
#define UB 127 /* min(63,static_cast<int8>(2.018 * 64)) */
#define UG -25 /* static_cast<int8>(-0.391 * 64 - 0.5) */
@ -637,7 +639,7 @@ void BGRAToUVRow_SSSE3(const uint8* src_argb, int src_stride_argb,
#ifdef HAS_REVERSE_ROW_SSSE3
// Shuffle table for reversing the bytes.
static const uvec8 kShuffleReverse = {
uvec8 kShuffleReverse = {
15u, 14u, 13u, 12u, 11u, 10u, 9u, 8u, 7u, 6u, 5u, 4u, 3u, 2u, 1u, 0u
};
@ -666,4 +668,7 @@ void ReverseRow_SSSE3(const uint8* src, uint8* dst, int width) {
}
#endif
#ifdef __cplusplus
} // extern "C"
} // namespace libyuv
#endif

9
source/row_win.cc
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@ -10,7 +10,10 @@
#include "row.h"
#ifdef __cplusplus
namespace libyuv {
extern "C" {
#endif
#ifdef HAS_ARGBTOYROW_SSSE3
@ -844,7 +847,7 @@ __asm {
}
#endif
#ifdef __cplusplus
} // extern "C"
} // namespace libyuv
#endif

100
source/scale.cc
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@ -16,20 +16,22 @@
#include "libyuv/cpu_id.h"
#include "row.h"
#ifdef __cplusplus
namespace libyuv {
extern "C" {
#endif
#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
@ -516,19 +518,21 @@ static void ScaleRowDown38_2_Int_NEON(const uint8* src_ptr, int src_stride,
#else
#define TALIGN16(t, var) t _ ## var __attribute__((aligned(16)))
#endif
#if (defined(__APPLE__) || defined(__MINGW32__) || defined(__CYGWIN__)) && \
defined(__i386__)
#define DECLARE_FUNCTION(name) \
".text \n" \
".globl _" name " \n" \
"_" name ": \n"
".globl _" #name " \n" \
"_" #name ": \n"
#else
#define DECLARE_FUNCTION(name) \
".text \n" \
".global _" name " \n" \
name ": \n"
".global _" #name " \n" \
#name ": \n"
#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 };
@ -3677,23 +3681,24 @@ int I420Scale(const uint8* src_y, int 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;
int src_halfwidth = (src_width + 1) >> 1;
int src_halfheight = (src_height + 1) >> 1;
int dst_halfwidth = (dst_width + 1) >> 1;
int dst_halfheight = (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,
ScalePlane(src_u, src_stride_u, src_halfwidth, src_halfheight,
dst_u, dst_stride_u, dst_halfwidth, dst_halfheight,
filtering, use_reference_impl_);
ScalePlane(src_v, src_stride_v, halfsrc_width, halfsrc_height,
dst_v, dst_stride_v, halfdst_width, halfoheight,
ScalePlane(src_v, src_stride_v, src_halfwidth, src_halfheight,
dst_v, dst_stride_v, dst_halfwidth, dst_halfheight,
filtering, use_reference_impl_);
return 0;
}
// Deprecated api
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,
@ -3716,49 +3721,54 @@ int Scale(const uint8* src_y, const uint8* src_u, const uint8* src_v,
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;
int src_halfwidth = (src_width + 1) >> 1;
int src_halfheight = (src_height + 1) >> 1;
int dst_halfwidth = (dst_width + 1) >> 1;
int dst_halfheight = (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,
ScalePlane(src_u, src_stride_u, src_halfwidth, src_halfheight,
dst_u, dst_stride_u, dst_halfwidth, dst_halfheight,
filtering, use_reference_impl_);
ScalePlane(src_v, src_stride_v, halfsrc_width, halfsrc_height,
dst_v, dst_stride_v, halfdst_width, halfoheight,
ScalePlane(src_v, src_stride_v, src_halfwidth, src_halfheight,
dst_v, dst_stride_v, dst_halfwidth, dst_halfheight,
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) {
// Deprecated api
int ScaleOffset(const uint8* src, int src_width, int src_height,
uint8* dst, int dst_width, int dst_height, int dst_yoffset,
bool interpolate) {
if (!src || src_width <= 0 || src_height <= 0 ||
!dst || dst_width <= 0 || dst_height <= 0 || ooffset < 0 ||
ooffset >= dst_height) {
!dst || dst_width <= 0 || dst_height <= 0 || dst_yoffset < 0 ||
dst_yoffset >= 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);
dst_yoffset = dst_yoffset & ~1; // chroma requires offset to multiple of 2.
int src_halfwidth = (src_width + 1) >> 1;
int src_halfheight = (src_height + 1) >> 1;
int dst_halfwidth = (dst_width + 1) >> 1;
int dst_halfheight = (dst_height + 1) >> 1;
int aheight = dst_height - dst_yoffset * 2; // actual output height
const uint8* const src_y = src;
const uint8* const src_u = src + src_width * src_height;
const uint8* const src_v = src + src_width * src_height +
src_halfwidth * src_halfheight;
uint8* dst_y = dst + dst_yoffset * dst_width;
uint8* dst_u = dst + dst_width * dst_height +
(dst_yoffset >> 1) * dst_halfwidth;
uint8* dst_v = dst + dst_width * dst_height + dst_halfwidth * dst_halfheight +
(dst_yoffset >> 1) * dst_halfwidth;
return Scale(src_y, src_u, src_v, src_width, src_halfwidth, src_halfwidth,
src_width, src_height, dst_y, dst_u, dst_v, dst_width,
dst_halfwidth, dst_halfwidth, dst_width, aheight, interpolate);
}
#ifdef __cplusplus
} // extern "C"
} // namespace libyuv
#endif

7
source/video_common.cc
View File

@ -13,7 +13,10 @@
#include <sstream>
#ifdef __cplusplus
namespace libyuv {
extern "C" {
#endif
#define ARRAY_SIZE(x) (static_cast<int>((sizeof(x)/sizeof(x[0]))))
@ -47,4 +50,8 @@ uint32 CanonicalFourCC(uint32 fourcc) {
return fourcc;
}
#ifdef __cplusplus
} // extern "C"
} // namespace libyuv
#endif

6
source/video_common.h
View File

@ -20,7 +20,10 @@
#include "libyuv/basic_types.h"
#ifdef __cplusplus
namespace libyuv {
extern "C" {
#endif
//////////////////////////////////////////////////////////////////////////////
// Definition of fourcc.
@ -84,6 +87,9 @@ enum FourCC {
// Converts fourcc aliases into canonical ones.
uint32 CanonicalFourCC(uint32 fourcc);
#ifdef __cplusplus
} // extern "C"
} // namespace libyuv
#endif
#endif // LIBYUV_SOURCE_VIDEO_COMMON_H_