ref: a62acf3c0ac35fc3763296f68dc02b23d65165ab
dir: /third_party/libyuv/source/format_conversion.cc/
/*
* Copyright 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/format_conversion.h"
#include "libyuv/basic_types.h"
#include "libyuv/cpu_id.h"
#include "libyuv/video_common.h"
#include "libyuv/row.h"
#ifdef __cplusplus
namespace libyuv {
extern "C" {
#endif
// generate a selector mask useful for pshufb
static uint32 GenerateSelector(int select0, int select1) {
return (uint32)(select0) |
(uint32)((select1 + 4) << 8) |
(uint32)((select0 + 8) << 16) |
(uint32)((select1 + 12) << 24);
}
static int MakeSelectors(const int blue_index,
const int green_index,
const int red_index,
uint32 dst_fourcc_bayer,
uint32* index_map) {
// Now build a lookup table containing the indices for the four pixels in each
// 2x2 Bayer grid.
switch (dst_fourcc_bayer) {
case FOURCC_BGGR:
index_map[0] = GenerateSelector(blue_index, green_index);
index_map[1] = GenerateSelector(green_index, red_index);
break;
case FOURCC_GBRG:
index_map[0] = GenerateSelector(green_index, blue_index);
index_map[1] = GenerateSelector(red_index, green_index);
break;
case FOURCC_RGGB:
index_map[0] = GenerateSelector(red_index, green_index);
index_map[1] = GenerateSelector(green_index, blue_index);
break;
case FOURCC_GRBG:
index_map[0] = GenerateSelector(green_index, red_index);
index_map[1] = GenerateSelector(blue_index, green_index);
break;
default:
return -1; // Bad FourCC
}
return 0;
}
// Converts 32 bit ARGB to Bayer RGB formats.
LIBYUV_API
int ARGBToBayer(const uint8* src_argb, int src_stride_argb,
uint8* dst_bayer, int dst_stride_bayer,
int width, int height,
uint32 dst_fourcc_bayer) {
int y;
const int blue_index = 0; // Offsets for ARGB format
const int green_index = 1;
const int red_index = 2;
uint32 index_map[2];
void (*ARGBToBayerRow)(const uint8* src_argb, uint8* dst_bayer,
uint32 selector, int pix) = ARGBToBayerRow_C;
if (height < 0) {
height = -height;
src_argb = src_argb + (height - 1) * src_stride_argb;
src_stride_argb = -src_stride_argb;
}
#if defined(HAS_ARGBTOBAYERROW_SSSE3)
if (TestCpuFlag(kCpuHasSSSE3) && width >= 8 &&
IS_ALIGNED(src_argb, 16) && IS_ALIGNED(src_stride_argb, 16)) {
ARGBToBayerRow = ARGBToBayerRow_Any_SSSE3;
if (IS_ALIGNED(width, 8)) {
ARGBToBayerRow = ARGBToBayerRow_SSSE3;
}
}
#elif defined(HAS_ARGBTOBAYERROW_NEON)
if (TestCpuFlag(kCpuHasNEON) && width >= 8) {
ARGBToBayerRow = ARGBToBayerRow_Any_NEON;
if (IS_ALIGNED(width, 8)) {
ARGBToBayerRow = ARGBToBayerRow_NEON;
}
}
#endif
if (MakeSelectors(blue_index, green_index, red_index,
dst_fourcc_bayer, index_map)) {
return -1; // Bad FourCC
}
for (y = 0; y < height; ++y) {
ARGBToBayerRow(src_argb, dst_bayer, index_map[y & 1], width);
src_argb += src_stride_argb;
dst_bayer += dst_stride_bayer;
}
return 0;
}
#define AVG(a, b) (((a) + (b)) >> 1)
static void BayerRowBG(const uint8* src_bayer0, int src_stride_bayer,
uint8* dst_argb, int pix) {
const uint8* src_bayer1 = src_bayer0 + src_stride_bayer;
uint8 g = src_bayer0[1];
uint8 r = src_bayer1[1];
int x;
for (x = 0; x < pix - 2; x += 2) {
dst_argb[0] = src_bayer0[0];
dst_argb[1] = AVG(g, src_bayer0[1]);
dst_argb[2] = AVG(r, src_bayer1[1]);
dst_argb[3] = 255U;
dst_argb[4] = AVG(src_bayer0[0], src_bayer0[2]);
dst_argb[5] = src_bayer0[1];
dst_argb[6] = src_bayer1[1];
dst_argb[7] = 255U;
g = src_bayer0[1];
r = src_bayer1[1];
src_bayer0 += 2;
src_bayer1 += 2;
dst_argb += 8;
}
dst_argb[0] = src_bayer0[0];
dst_argb[1] = AVG(g, src_bayer0[1]);
dst_argb[2] = AVG(r, src_bayer1[1]);
dst_argb[3] = 255U;
if (!(pix & 1)) {
dst_argb[4] = src_bayer0[0];
dst_argb[5] = src_bayer0[1];
dst_argb[6] = src_bayer1[1];
dst_argb[7] = 255U;
}
}
static void BayerRowRG(const uint8* src_bayer0, int src_stride_bayer,
uint8* dst_argb, int pix) {
const uint8* src_bayer1 = src_bayer0 + src_stride_bayer;
uint8 g = src_bayer0[1];
uint8 b = src_bayer1[1];
int x;
for (x = 0; x < pix - 2; x += 2) {
dst_argb[0] = AVG(b, src_bayer1[1]);
dst_argb[1] = AVG(g, src_bayer0[1]);
dst_argb[2] = src_bayer0[0];
dst_argb[3] = 255U;
dst_argb[4] = src_bayer1[1];
dst_argb[5] = src_bayer0[1];
dst_argb[6] = AVG(src_bayer0[0], src_bayer0[2]);
dst_argb[7] = 255U;
g = src_bayer0[1];
b = src_bayer1[1];
src_bayer0 += 2;
src_bayer1 += 2;
dst_argb += 8;
}
dst_argb[0] = AVG(b, src_bayer1[1]);
dst_argb[1] = AVG(g, src_bayer0[1]);
dst_argb[2] = src_bayer0[0];
dst_argb[3] = 255U;
if (!(pix & 1)) {
dst_argb[4] = src_bayer1[1];
dst_argb[5] = src_bayer0[1];
dst_argb[6] = src_bayer0[0];
dst_argb[7] = 255U;
}
}
static void BayerRowGB(const uint8* src_bayer0, int src_stride_bayer,
uint8* dst_argb, int pix) {
const uint8* src_bayer1 = src_bayer0 + src_stride_bayer;
uint8 b = src_bayer0[1];
int x;
for (x = 0; x < pix - 2; x += 2) {
dst_argb[0] = AVG(b, src_bayer0[1]);
dst_argb[1] = src_bayer0[0];
dst_argb[2] = src_bayer1[0];
dst_argb[3] = 255U;
dst_argb[4] = src_bayer0[1];
dst_argb[5] = AVG(src_bayer0[0], src_bayer0[2]);
dst_argb[6] = AVG(src_bayer1[0], src_bayer1[2]);
dst_argb[7] = 255U;
b = src_bayer0[1];
src_bayer0 += 2;
src_bayer1 += 2;
dst_argb += 8;
}
dst_argb[0] = AVG(b, src_bayer0[1]);
dst_argb[1] = src_bayer0[0];
dst_argb[2] = src_bayer1[0];
dst_argb[3] = 255U;
if (!(pix & 1)) {
dst_argb[4] = src_bayer0[1];
dst_argb[5] = src_bayer0[0];
dst_argb[6] = src_bayer1[0];
dst_argb[7] = 255U;
}
}
static void BayerRowGR(const uint8* src_bayer0, int src_stride_bayer,
uint8* dst_argb, int pix) {
const uint8* src_bayer1 = src_bayer0 + src_stride_bayer;
uint8 r = src_bayer0[1];
int x;
for (x = 0; x < pix - 2; x += 2) {
dst_argb[0] = src_bayer1[0];
dst_argb[1] = src_bayer0[0];
dst_argb[2] = AVG(r, src_bayer0[1]);
dst_argb[3] = 255U;
dst_argb[4] = AVG(src_bayer1[0], src_bayer1[2]);
dst_argb[5] = AVG(src_bayer0[0], src_bayer0[2]);
dst_argb[6] = src_bayer0[1];
dst_argb[7] = 255U;
r = src_bayer0[1];
src_bayer0 += 2;
src_bayer1 += 2;
dst_argb += 8;
}
dst_argb[0] = src_bayer1[0];
dst_argb[1] = src_bayer0[0];
dst_argb[2] = AVG(r, src_bayer0[1]);
dst_argb[3] = 255U;
if (!(pix & 1)) {
dst_argb[4] = src_bayer1[0];
dst_argb[5] = src_bayer0[0];
dst_argb[6] = src_bayer0[1];
dst_argb[7] = 255U;
}
}
// Converts any Bayer RGB format to ARGB.
LIBYUV_API
int BayerToARGB(const uint8* src_bayer, int src_stride_bayer,
uint8* dst_argb, int dst_stride_argb,
int width, int height,
uint32 src_fourcc_bayer) {
int y;
void (*BayerRow0)(const uint8* src_bayer, int src_stride_bayer,
uint8* dst_argb, int pix);
void (*BayerRow1)(const uint8* src_bayer, int src_stride_bayer,
uint8* dst_argb, int pix);
if (height < 0) {
height = -height;
dst_argb = dst_argb + (height - 1) * dst_stride_argb;
dst_stride_argb = -dst_stride_argb;
}
switch (src_fourcc_bayer) {
case FOURCC_BGGR:
BayerRow0 = BayerRowBG;
BayerRow1 = BayerRowGR;
break;
case FOURCC_GBRG:
BayerRow0 = BayerRowGB;
BayerRow1 = BayerRowRG;
break;
case FOURCC_GRBG:
BayerRow0 = BayerRowGR;
BayerRow1 = BayerRowBG;
break;
case FOURCC_RGGB:
BayerRow0 = BayerRowRG;
BayerRow1 = BayerRowGB;
break;
default:
return -1; // Bad FourCC
}
for (y = 0; y < height - 1; y += 2) {
BayerRow0(src_bayer, src_stride_bayer, dst_argb, width);
BayerRow1(src_bayer + src_stride_bayer, -src_stride_bayer,
dst_argb + dst_stride_argb, width);
src_bayer += src_stride_bayer * 2;
dst_argb += dst_stride_argb * 2;
}
if (height & 1) {
BayerRow0(src_bayer, src_stride_bayer, dst_argb, width);
}
return 0;
}
// Converts any Bayer RGB format to ARGB.
LIBYUV_API
int BayerToI420(const uint8* src_bayer, int src_stride_bayer,
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,
uint32 src_fourcc_bayer) {
void (*BayerRow0)(const uint8* src_bayer, int src_stride_bayer,
uint8* dst_argb, int pix);
void (*BayerRow1)(const uint8* src_bayer, int src_stride_bayer,
uint8* dst_argb, int pix);
void (*ARGBToUVRow)(const uint8* src_argb0, int src_stride_argb,
uint8* dst_u, uint8* dst_v, int width) = ARGBToUVRow_C;
void (*ARGBToYRow)(const uint8* src_argb, uint8* dst_y, int pix) =
ARGBToYRow_C;
// Negative height means invert the image.
if (height < 0) {
int halfheight;
height = -height;
halfheight = (height + 1) >> 1;
dst_y = dst_y + (height - 1) * dst_stride_y;
dst_u = dst_u + (halfheight - 1) * dst_stride_u;
dst_v = dst_v + (halfheight - 1) * dst_stride_v;
dst_stride_y = -dst_stride_y;
dst_stride_u = -dst_stride_u;
dst_stride_v = -dst_stride_v;
}
#if defined(HAS_ARGBTOYROW_SSSE3) && defined(HAS_ARGBTOUVROW_SSSE3)
if (TestCpuFlag(kCpuHasSSSE3) && width >= 16) {
ARGBToUVRow = ARGBToUVRow_Any_SSSE3;
ARGBToYRow = ARGBToYRow_Any_SSSE3;
if (IS_ALIGNED(width, 16)) {
ARGBToYRow = ARGBToYRow_Unaligned_SSSE3;
ARGBToUVRow = ARGBToUVRow_SSSE3;
if (IS_ALIGNED(dst_y, 16) && IS_ALIGNED(dst_stride_y, 16)) {
ARGBToYRow = ARGBToYRow_SSSE3;
}
}
}
#elif defined(HAS_ARGBTOYROW_NEON)
if (TestCpuFlag(kCpuHasNEON) && width >= 8) {
ARGBToYRow = ARGBToYRow_Any_NEON;
if (IS_ALIGNED(width, 8)) {
ARGBToYRow = ARGBToYRow_NEON;
}
}
#endif
#if defined(HAS_ARGBTOUVROW_NEON)
if (TestCpuFlag(kCpuHasNEON) && width >= 16) {
ARGBToUVRow = ARGBToUVRow_Any_NEON;
if (IS_ALIGNED(width, 16)) {
ARGBToUVRow = ARGBToUVRow_NEON;
}
}
#endif
switch (src_fourcc_bayer) {
case FOURCC_BGGR:
BayerRow0 = BayerRowBG;
BayerRow1 = BayerRowGR;
break;
case FOURCC_GBRG:
BayerRow0 = BayerRowGB;
BayerRow1 = BayerRowRG;
break;
case FOURCC_GRBG:
BayerRow0 = BayerRowGR;
BayerRow1 = BayerRowBG;
break;
case FOURCC_RGGB:
BayerRow0 = BayerRowRG;
BayerRow1 = BayerRowGB;
break;
default:
return -1; // Bad FourCC
}
{
// Allocate 2 rows of ARGB.
const int kRowSize = (width * 4 + 15) & ~15;
align_buffer_64(row, kRowSize * 2);
int y;
for (y = 0; y < height - 1; y += 2) {
BayerRow0(src_bayer, src_stride_bayer, row, width);
BayerRow1(src_bayer + src_stride_bayer, -src_stride_bayer,
row + kRowSize, width);
ARGBToUVRow(row, kRowSize, dst_u, dst_v, width);
ARGBToYRow(row, dst_y, width);
ARGBToYRow(row + kRowSize, dst_y + dst_stride_y, width);
src_bayer += src_stride_bayer * 2;
dst_y += dst_stride_y * 2;
dst_u += dst_stride_u;
dst_v += dst_stride_v;
}
if (height & 1) {
BayerRow0(src_bayer, src_stride_bayer, row, width);
ARGBToUVRow(row, 0, dst_u, dst_v, width);
ARGBToYRow(row, dst_y, width);
}
free_aligned_buffer_64(row);
}
return 0;
}
// Convert I420 to Bayer.
LIBYUV_API
int I420ToBayer(const uint8* src_y, int src_stride_y,
const uint8* src_u, int src_stride_u,
const uint8* src_v, int src_stride_v,
uint8* dst_bayer, int dst_stride_bayer,
int width, int height,
uint32 dst_fourcc_bayer) {
void (*I422ToARGBRow)(const uint8* y_buf,
const uint8* u_buf,
const uint8* v_buf,
uint8* rgb_buf,
int width) = I422ToARGBRow_C;
void (*ARGBToBayerRow)(const uint8* src_argb, uint8* dst_bayer,
uint32 selector, int pix) = ARGBToBayerRow_C;
const int blue_index = 0; // Offsets for ARGB format
const int green_index = 1;
const int red_index = 2;
uint32 index_map[2];
// Negative height means invert the image.
if (height < 0) {
int halfheight;
height = -height;
halfheight = (height + 1) >> 1;
src_y = src_y + (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;
}
#if defined(HAS_I422TOARGBROW_SSSE3)
if (TestCpuFlag(kCpuHasSSSE3) && width >= 8) {
I422ToARGBRow = I422ToARGBRow_Any_SSSE3;
if (IS_ALIGNED(width, 8)) {
I422ToARGBRow = I422ToARGBRow_SSSE3;
}
}
#endif
#if defined(HAS_I422TOARGBROW_AVX2)
if (TestCpuFlag(kCpuHasAVX2) && width >= 16) {
I422ToARGBRow = I422ToARGBRow_Any_AVX2;
if (IS_ALIGNED(width, 16)) {
I422ToARGBRow = I422ToARGBRow_AVX2;
}
}
#endif
#if defined(HAS_I422TOARGBROW_NEON)
if (TestCpuFlag(kCpuHasNEON) && width >= 8) {
I422ToARGBRow = I422ToARGBRow_Any_NEON;
if (IS_ALIGNED(width, 8)) {
I422ToARGBRow = I422ToARGBRow_NEON;
}
}
#endif
#if defined(HAS_I422TOARGBROW_MIPS_DSPR2)
if (TestCpuFlag(kCpuHasMIPS_DSPR2) && IS_ALIGNED(width, 4) &&
IS_ALIGNED(src_y, 4) && IS_ALIGNED(src_stride_y, 4) &&
IS_ALIGNED(src_u, 2) && IS_ALIGNED(src_stride_u, 2) &&
IS_ALIGNED(src_v, 2) && IS_ALIGNED(src_stride_v, 2)) {
I422ToARGBRow = I422ToARGBRow_MIPS_DSPR2;
}
#endif
#if defined(HAS_ARGBTOBAYERROW_SSSE3)
if (TestCpuFlag(kCpuHasSSSE3) && width >= 8) {
ARGBToBayerRow = ARGBToBayerRow_Any_SSSE3;
if (IS_ALIGNED(width, 8)) {
ARGBToBayerRow = ARGBToBayerRow_SSSE3;
}
}
#elif defined(HAS_ARGBTOBAYERROW_NEON)
if (TestCpuFlag(kCpuHasNEON) && width >= 8) {
ARGBToBayerRow = ARGBToBayerRow_Any_NEON;
if (IS_ALIGNED(width, 8)) {
ARGBToBayerRow = ARGBToBayerRow_NEON;
}
}
#endif
if (MakeSelectors(blue_index, green_index, red_index,
dst_fourcc_bayer, index_map)) {
return -1; // Bad FourCC
}
{
// Allocate a row of ARGB.
align_buffer_64(row, width * 4);
int y;
for (y = 0; y < height; ++y) {
I422ToARGBRow(src_y, src_u, src_v, row, width);
ARGBToBayerRow(row, dst_bayer, index_map[y & 1], width);
dst_bayer += dst_stride_bayer;
src_y += src_stride_y;
if (y & 1) {
src_u += src_stride_u;
src_v += src_stride_v;
}
}
free_aligned_buffer_64(row);
}
return 0;
}
#define MAKEBAYERFOURCC(BAYER) \
LIBYUV_API \
int Bayer##BAYER##ToI420(const uint8* src_bayer, int src_stride_bayer, \
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 BayerToI420(src_bayer, src_stride_bayer, \
dst_y, dst_stride_y, \
dst_u, dst_stride_u, \
dst_v, dst_stride_v, \
width, height, \
FOURCC_##BAYER); \
} \
\
LIBYUV_API \
int I420ToBayer##BAYER(const uint8* src_y, int src_stride_y, \
const uint8* src_u, int src_stride_u, \
const uint8* src_v, int src_stride_v, \
uint8* dst_bayer, int dst_stride_bayer, \
int width, int height) { \
return I420ToBayer(src_y, src_stride_y, \
src_u, src_stride_u, \
src_v, src_stride_v, \
dst_bayer, dst_stride_bayer, \
width, height, \
FOURCC_##BAYER); \
} \
\
LIBYUV_API \
int ARGBToBayer##BAYER(const uint8* src_argb, int src_stride_argb, \
uint8* dst_bayer, int dst_stride_bayer, \
int width, int height) { \
return ARGBToBayer(src_argb, src_stride_argb, \
dst_bayer, dst_stride_bayer, \
width, height, \
FOURCC_##BAYER); \
} \
\
LIBYUV_API \
int Bayer##BAYER##ToARGB(const uint8* src_bayer, int src_stride_bayer, \
uint8* dst_argb, int dst_stride_argb, \
int width, int height) { \
return BayerToARGB(src_bayer, src_stride_bayer, \
dst_argb, dst_stride_argb, \
width, height, \
FOURCC_##BAYER); \
}
MAKEBAYERFOURCC(BGGR)
MAKEBAYERFOURCC(GBRG)
MAKEBAYERFOURCC(GRBG)
MAKEBAYERFOURCC(RGGB)
#ifdef __cplusplus
} // extern "C"
} // namespace libyuv
#endif