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unify the ALTERNATE_CODE flag usage

Browse Source 
Pattern is now:
 #if !defined(FLAG)
 #define FLAG 0   // ALTERNATE_CODE
 #endif
...
 #if (FLAG == 1)
 ...
 #else
  ...
 #endif    // FLAG
...

Removed some unused code / flags:
  WEBP_YUV_USE_TABLE, WEBP_REFERENCE_IMPLEMENTATION,
  experimental code,  VP8YUVInit(), ...

BUG=webp:355

Change-Id: I98deb9189446a4cfd665c13ea8aa1ce6a308c63f
This commit is contained in:
skal 2017-07-31 18:53:29 -07:00 committed by James Zern
parent c4568b47fd
commit 663a6d9d2e
19 changed files with 70 additions and 163 deletions
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2
CMakeLists.txt
View File

@ -35,7 +35,7 @@ string(REGEX MATCH "[0-9.]+" WEBP_VERSION ${SOURCE_FILE})
################################################################################
# Options.
if(WEBP_ENABLE_SWAP_16BIT_CSP)
add_definitions(-DWEBP_SWAP_16BIT_CSP)
add_definitions(-DWEBP_SWAP_16BIT_CSP=1)
endif()
################################################################################

4
configure.ac
View File

@ -659,7 +659,7 @@ if test "$enable_wic" = "yes"; then
fi
esac
dnl === If --enable-swap-16bit-csp is defined, add -DWEBP_SWAP_16BIT_CSP
dnl === If --enable-swap-16bit-csp is defined, add -DWEBP_SWAP_16BIT_CSP=1
USE_SWAP_16BIT_CSP=""
AC_MSG_CHECKING(if --enable-swap-16bit-csp option is specified)
@ -667,7 +667,7 @@ AC_ARG_ENABLE([swap-16bit-csp],
AS_HELP_STRING([--enable-swap-16bit-csp],
[Enable byte swap for 16 bit colorspaces]))
if test "$enable_swap_16bit_csp" = "yes"; then
USE_SWAP_16BIT_CSP="-DWEBP_SWAP_16BIT_CSP"
USE_SWAP_16BIT_CSP="-DWEBP_SWAP_16BIT_CSP=1"
fi
AC_MSG_RESULT(${enable_swap_16bit_csp-no})
AC_SUBST(USE_SWAP_16BIT_CSP)

2
makefile.unix
View File

@ -57,7 +57,7 @@ endif
# EXTRA_FLAGS += -DWEBP_EXPERIMENTAL_FEATURES
# Extra flags to enable byte swap for 16 bit colorspaces.
# EXTRA_FLAGS += -DWEBP_SWAP_16BIT_CSP
# EXTRA_FLAGS += -DWEBP_SWAP_16BIT_CSP=1
# Extra flags to enable multi-threading
EXTRA_FLAGS += -DWEBP_USE_THREAD

7
src/dec/io_dec.c
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@ -212,7 +212,7 @@ static int EmitAlphaRGBA4444(const VP8Io* const io, WebPDecParams* const p,
int num_rows;
const int start_y = GetAlphaSourceRow(io, &alpha, &num_rows);
uint8_t* const base_rgba = buf->rgba + start_y * buf->stride;
#ifdef WEBP_SWAP_16BIT_CSP
#if (WEBP_SWAP_16BIT_CSP == 1)
uint8_t* alpha_dst = base_rgba;
#else
uint8_t* alpha_dst = base_rgba + 1;
@ -431,7 +431,7 @@ static int ExportAlphaRGBA4444(WebPDecParams* const p, int y_pos,
int max_lines_out) {
const WebPRGBABuffer* const buf = &p->output->u.RGBA;
uint8_t* const base_rgba = buf->rgba + y_pos * buf->stride;
#ifdef WEBP_SWAP_16BIT_CSP
#if (WEBP_SWAP_16BIT_CSP == 1)
uint8_t* alpha_dst = base_rgba;
#else
uint8_t* alpha_dst = base_rgba + 1;
@ -598,9 +598,6 @@ static int CustomSetup(VP8Io* io) {
}
}
if (is_rgb) {
VP8YUVInit();
}
return 1;
}

10
src/dec/tree_dec.c
View File

@ -14,12 +14,16 @@
#include "./vp8i_dec.h"
#include "../utils/bit_reader_inl_utils.h"
#if !defined(USE_GENERIC_TREE)
#if !defined(__arm__) && !defined(_M_ARM) && !defined(__aarch64__)
// using a table is ~1-2% slower on ARM. Prefer the coded-tree approach then.
#define USE_GENERIC_TREE
#define USE_GENERIC_TREE 1 // ALTERNATE_CODE
#else
#define USE_GENERIC_TREE 0
#endif
#endif // USE_GENERIC_TREE
#ifdef USE_GENERIC_TREE
#if (USE_GENERIC_TREE == 1)
static const int8_t kYModesIntra4[18] = {
-B_DC_PRED, 1,
-B_TM_PRED, 2,
@ -317,7 +321,7 @@ static void ParseIntraMode(VP8BitReader* const br,
int x;
for (x = 0; x < 4; ++x) {
const uint8_t* const prob = kBModesProba[top[x]][ymode];
#ifdef USE_GENERIC_TREE
#if (USE_GENERIC_TREE == 1)
// Generic tree-parsing
int i = kYModesIntra4[VP8GetBit(br, prob[0])];
while (i > 0) {

9
src/dsp/alpha_processing.c
View File

@ -15,7 +15,10 @@
#include "./dsp.h"
// Tables can be faster on some platform but incur some extra binary size (~2k).
// #define USE_TABLES_FOR_ALPHA_MULT
#if !defined(USE_TABLES_FOR_ALPHA_MULT)
#define USE_TABLES_FOR_ALPHA_MULT 0 // ALTERNATE_CODE
#endif
// -----------------------------------------------------------------------------
@ -29,7 +32,7 @@ static uint32_t Mult(uint8_t x, uint32_t mult) {
return v;
}
#ifdef USE_TABLES_FOR_ALPHA_MULT
#if (USE_TABLES_FOR_ALPHA_MULT == 1)
static const uint32_t kMultTables[2][256] = {
{ // (255u << MFIX) / alpha
@ -277,7 +280,7 @@ static WEBP_INLINE void ApplyAlphaMultiply4444_C(uint8_t* rgba4444,
static void ApplyAlphaMultiply_16b_C(uint8_t* rgba4444,
int w, int h, int stride) {
#ifdef WEBP_SWAP_16BIT_CSP
#if (WEBP_SWAP_16BIT_CSP == 1)
ApplyAlphaMultiply4444_C(rgba4444, w, h, stride, 1);
#else
ApplyAlphaMultiply4444_C(rgba4444, w, h, stride, 0);

11
src/dsp/dec_clip_tables.c
View File

@ -13,9 +13,12 @@
#include "./dsp.h"
#define USE_STATIC_TABLES // undefine to have run-time table initialization
// define to 0 to have run-time table initialization
#if !defined(USE_STATIC_TABLES)
#define USE_STATIC_TABLES 1 // ALTERNATE_CODE
#endif
#ifdef USE_STATIC_TABLES
#if (USE_STATIC_TABLES == 1)
static const uint8_t abs0[255 + 255 + 1] = {
0xff, 0xfe, 0xfd, 0xfc, 0xfb, 0xfa, 0xf9, 0xf8, 0xf7, 0xf6, 0xf5, 0xf4,
@ -337,7 +340,7 @@ static uint8_t clip1[255 + 511 + 1];
// and make sure it's set to true _last_ (so as to be thread-safe)
static volatile int tables_ok = 0;
#endif
#endif // USE_STATIC_TABLES
const int8_t* const VP8ksclip1 = (const int8_t*)&sclip1[1020];
const int8_t* const VP8ksclip2 = (const int8_t*)&sclip2[112];
@ -345,7 +348,7 @@ const uint8_t* const VP8kclip1 = &clip1[255];
const uint8_t* const VP8kabs0 = &abs0[255];
WEBP_TSAN_IGNORE_FUNCTION void VP8InitClipTables(void) {
#if !defined(USE_STATIC_TABLES)
#if (USE_STATIC_TABLES == 0)
int i;
if (!tables_ok) {
for (i = -255; i <= 255; ++i) {

10
src/dsp/dec_sse2.c
View File

@ -18,7 +18,9 @@
// The 3-coeff sparse transform in SSE2 is not really faster than the plain-C
// one it seems => disable it by default. Uncomment the following to enable:
// #define USE_TRANSFORM_AC3
#if !defined(USE_TRANSFORM_AC3)
#define USE_TRANSFORM_AC3 0 // ALTERNATE_CODE
#endif
#include <emmintrin.h>
#include "./common_sse2.h"
@ -193,7 +195,7 @@ static void Transform(const int16_t* in, uint8_t* dst, int do_two) {
}
}
#if defined(USE_TRANSFORM_AC3)
#if (USE_TRANSFORM_AC3 == 1)
#define MUL(a, b) (((a) * (b)) >> 16)
static void TransformAC3(const int16_t* in, uint8_t* dst) {
static const int kC1 = 20091 + (1 << 16);
@ -1182,8 +1184,8 @@ extern void VP8DspInitSSE2(void);
WEBP_TSAN_IGNORE_FUNCTION void VP8DspInitSSE2(void) {
VP8Transform = Transform;
#if defined(USE_TRANSFORM_AC3)
VP8TransformAC3 = TransformAC3;
#if (USE_TRANSFORM_AC3 == 1)
VP8TransformAC3 = TransformAC3_SSE2;
#endif
VP8VFilter16 = VFilter16;

5
src/dsp/dsp.h
View File

@ -134,6 +134,11 @@ extern "C" {
#endif
#endif
// Regularize the definition of WEBP_SWAP_16BIT_CSP (backward compatibility)
#if !defined(WEBP_SWAP_16BIT_CSP)
#define WEBP_SWAP_16BIT_CSP 0
#endif
typedef enum {
kSSE2,
kSSE3,

8
src/dsp/filters_neon.c
View File

@ -251,9 +251,11 @@ static void VerticalUnfilter_NEON(const uint8_t* prev, const uint8_t* in,
// GradientUnfilter_NEON is correct but slower than the C-version,
// at least on ARM64. For armv7, it's a wash.
// So best is to disable it for now, but keep the idea around...
// #define USE_GRADIENT_UNFILTER
#if !defined(USE_GRADIENT_UNFILTER)
#define USE_GRADIENT_UNFILTER 0 // ALTERNATE_CODE
#endif
#if defined(USE_GRADIENT_UNFILTER)
#if (USE_GRADIENT_UNFILTER == 1)
#define GRAD_PROCESS_LANE(L) do { \
const uint8x8_t tmp1 = ROTATE_RIGHT_N(pred, 1); /* rotate predictor in */ \
const int16x8_t tmp2 = vaddq_s16(BC, U8_TO_S16(tmp1)); \
@ -311,7 +313,7 @@ extern void VP8FiltersInitNEON(void);
WEBP_TSAN_IGNORE_FUNCTION void VP8FiltersInitNEON(void) {
WebPUnfilters[WEBP_FILTER_HORIZONTAL] = HorizontalUnfilter_NEON;
WebPUnfilters[WEBP_FILTER_VERTICAL] = VerticalUnfilter_NEON;
#if defined(USE_GRADIENT_UNFILTER)
#if (USE_GRADIENT_UNFILTER == 1)
WebPUnfilters[WEBP_FILTER_GRADIENT] = GradientUnfilter_NEON;
#endif

19
src/dsp/lossless.c
View File

@ -452,7 +452,7 @@ void VP8LConvertBGRAToRGBA4444_C(const uint32_t* src,
const uint32_t argb = *src++;
const uint8_t rg = ((argb >> 16) & 0xf0) | ((argb >> 12) & 0xf);
const uint8_t ba = ((argb >> 0) & 0xf0) | ((argb >> 28) & 0xf);
#ifdef WEBP_SWAP_16BIT_CSP
#if (WEBP_SWAP_16BIT_CSP == 1)
*dst++ = ba;
*dst++ = rg;
#else
@ -469,7 +469,7 @@ void VP8LConvertBGRAToRGB565_C(const uint32_t* src,
const uint32_t argb = *src++;
const uint8_t rg = ((argb >> 16) & 0xf8) | ((argb >> 13) & 0x7);
const uint8_t gb = ((argb >> 5) & 0xe0) | ((argb >> 3) & 0x1f);
#ifdef WEBP_SWAP_16BIT_CSP
#if (WEBP_SWAP_16BIT_CSP == 1)
*dst++ = gb;
*dst++ = rg;
#else
@ -496,22 +496,7 @@ static void CopyOrSwap(const uint32_t* src, int num_pixels, uint8_t* dst,
const uint32_t* const src_end = src + num_pixels;
while (src < src_end) {
const uint32_t argb = *src++;
#if !defined(WORDS_BIGENDIAN)
#if !defined(WEBP_REFERENCE_IMPLEMENTATION)
WebPUint32ToMem(dst, BSwap32(argb));
#else // WEBP_REFERENCE_IMPLEMENTATION
dst[0] = (argb >> 24) & 0xff;
dst[1] = (argb >> 16) & 0xff;
dst[2] = (argb >> 8) & 0xff;
dst[3] = (argb >> 0) & 0xff;
#endif
#else // WORDS_BIGENDIAN
dst[0] = (argb >> 0) & 0xff;
dst[1] = (argb >> 8) & 0xff;
dst[2] = (argb >> 16) & 0xff;
dst[3] = (argb >> 24) & 0xff;
#endif
dst += sizeof(argb);
}
} else {

8
src/dsp/lossless_mips_dsp_r2.c
View File

@ -492,7 +492,7 @@ static void ConvertBGRAToRGBA4444(const uint32_t* src,
"ins %[temp3], %[temp5], 16, 4 \n\t"
"addiu %[src], %[src], 16 \n\t"
"precr.qb.ph %[temp3], %[temp3], %[temp2] \n\t"
#ifdef WEBP_SWAP_16BIT_CSP
#if (WEBP_SWAP_16BIT_CSP == 1)
"usw %[temp1], 0(%[dst]) \n\t"
"usw %[temp3], 4(%[dst]) \n\t"
#else
@ -514,7 +514,7 @@ static void ConvertBGRAToRGBA4444(const uint32_t* src,
"ins %[temp0], %[temp5], 16, 4 \n\t"
"addiu %[src], %[src], 4 \n\t"
"precr.qb.ph %[temp0], %[temp0], %[temp0] \n\t"
#ifdef WEBP_SWAP_16BIT_CSP
#if (WEBP_SWAP_16BIT_CSP == 1)
"ush %[temp0], 0(%[dst]) \n\t"
#else
"wsbh %[temp0], %[temp0] \n\t"
@ -570,7 +570,7 @@ static void ConvertBGRAToRGB565(const uint32_t* src,
"ins %[temp2], %[temp3], 0, 5 \n\t"
"addiu %[src], %[src], 16 \n\t"
"append %[temp2], %[temp1], 16 \n\t"
#ifdef WEBP_SWAP_16BIT_CSP
#if (WEBP_SWAP_16BIT_CSP == 1)
"usw %[temp0], 0(%[dst]) \n\t"
"usw %[temp2], 4(%[dst]) \n\t"
#else
@ -592,7 +592,7 @@ static void ConvertBGRAToRGB565(const uint32_t* src,
"ins %[temp4], %[temp5], 0, 11 \n\t"
"addiu %[src], %[src], 4 \n\t"
"ins %[temp4], %[temp0], 0, 5 \n\t"
#ifdef WEBP_SWAP_16BIT_CSP
#if (WEBP_SWAP_16BIT_CSP == 1)
"ush %[temp4], 0(%[dst]) \n\t"
#else
"wsbh %[temp4], %[temp4] \n\t"

4
src/dsp/lossless_sse2.c
View File

@ -570,7 +570,7 @@ static void ConvertBGRAToRGBA4444(const uint32_t* src,
const __m128i ga2 = _mm_and_si128(ga1, mask_0x0f); // g0-|g1-|...|a6-|a7-
const __m128i rgba0 = _mm_or_si128(ga2, rb1); // rg0..rg7 | ba0..ba7
const __m128i rgba1 = _mm_srli_si128(rgba0, 8); // ba0..ba7 | 0
#ifdef WEBP_SWAP_16BIT_CSP
#if (WEBP_SWAP_16BIT_CSP == 1)
const __m128i rgba = _mm_unpacklo_epi8(rgba1, rgba0); // barg0...barg7
#else
const __m128i rgba = _mm_unpacklo_epi8(rgba0, rgba1); // rgba0...rgba7
@ -611,7 +611,7 @@ static void ConvertBGRAToRGB565(const uint32_t* src,
const __m128i rg1 = _mm_or_si128(rb1, g_lo2); // gr0...gr7|xx
const __m128i b1 = _mm_srli_epi16(b0, 3);
const __m128i gb1 = _mm_or_si128(b1, g_hi2); // bg0...bg7|xx
#ifdef WEBP_SWAP_16BIT_CSP
#if (WEBP_SWAP_16BIT_CSP == 1)
const __m128i rgba = _mm_unpacklo_epi8(gb1, rg1); // rggb0...rggb7
#else
const __m128i rgba = _mm_unpacklo_epi8(rg1, gb1); // bgrb0...bgrb7

1
src/dsp/upsampling.c
View File

@ -141,7 +141,6 @@ DUAL_SAMPLE_FUNC(DualLineSamplerARGB, VP8YuvToArgb)
WebPUpsampleLinePairFunc WebPGetLinePairConverter(int alpha_is_last) {
WebPInitUpsamplers();
VP8YUVInit();
#ifdef FANCY_UPSAMPLING
return WebPUpsamplers[alpha_is_last ? MODE_BGRA : MODE_ARGB];
#else

7
src/dsp/upsampling_mips_dsp_r2.c
View File

@ -19,8 +19,6 @@
#include <assert.h>
#include "./yuv.h"
#if !defined(WEBP_YUV_USE_TABLE)
#define YUV_TO_RGB(Y, U, V, R, G, B) do { \
const int t1 = MultHi(Y, 19077); \
const int t2 = MultHi(V, 13320); \
@ -68,7 +66,7 @@ static WEBP_INLINE void YuvToRgb565(int y, int u, int v, uint8_t* const rgb) {
{
const int rg = (r & 0xf8) | (g >> 5);
const int gb = ((g << 3) & 0xe0) | (b >> 3);
#ifdef WEBP_SWAP_16BIT_CSP
#if (WEBP_SWAP_16BIT_CSP == 1)
rgb[0] = gb;
rgb[1] = rg;
#else
@ -84,7 +82,7 @@ static WEBP_INLINE void YuvToRgba4444(int y, int u, int v,
{
const int rg = (r & 0xf0) | (g >> 4);
const int ba = (b & 0xf0) | 0x0f; // overwrite the lower 4 bits
#ifdef WEBP_SWAP_16BIT_CSP
#if (WEBP_SWAP_16BIT_CSP == 1)
argb[0] = ba;
argb[1] = rg;
#else
@ -93,7 +91,6 @@ static WEBP_INLINE void YuvToRgba4444(int y, int u, int v,
#endif
}
}
#endif // WEBP_YUV_USE_TABLE
//-----------------------------------------------------------------------------
// Alpha handling variants

24
src/dsp/upsampling_msa.c
View File

@ -274,7 +274,7 @@ static void YuvToRgb565(int y, int u, int v, uint8_t* const rgb) {
const int b = Clip8(b1 >> 6);
const int rg = (r & 0xf8) | (g >> 5);
const int gb = ((g << 3) & 0xe0) | (b >> 3);
#ifdef WEBP_SWAP_16BIT_CSP
#if (WEBP_SWAP_16BIT_CSP == 1)
rgb[0] = gb;
rgb[1] = rg;
#else
@ -293,7 +293,7 @@ static void YuvToRgba4444(int y, int u, int v, uint8_t* const argb) {
const int b = Clip8(b1 >> 6);
const int rg = (r & 0xf0) | (g >> 4);
const int ba = (b & 0xf0) | 0x0f; // overwrite the lower 4 bits
#ifdef WEBP_SWAP_16BIT_CSP
#if (WEBP_SWAP_16BIT_CSP == 1)
argb[0] = ba;
argb[1] = rg;
#else
@ -459,11 +459,11 @@ static void YuvToRgba4444Line(const uint8_t* y, const uint8_t* u,
const uint8_t* v, uint8_t* dst, int length) {
v16u8 R, G, B, RG, BA, tmp0, tmp1;
while (length >= 16) {
#ifdef WEBP_SWAP_16BIT_CSP
#if (WEBP_SWAP_16BIT_CSP == 1)
CALC_RGBA4444(y, u, v, BA, RG, 16, dst);
#else
#else
CALC_RGBA4444(y, u, v, RG, BA, 16, dst);
#endif
#endif
y += 16;
u += 16;
v += 16;
@ -473,7 +473,7 @@ static void YuvToRgba4444Line(const uint8_t* y, const uint8_t* u,
if (length > 8) {
uint8_t temp[2 * 16] = { 0 };
memcpy(temp, y, length * sizeof(*temp));
#ifdef WEBP_SWAP_16BIT_CSP
#if (WEBP_SWAP_16BIT_CSP == 1)
CALC_RGBA4444(temp, u, v, BA, RG, 16, temp);
#else
CALC_RGBA4444(temp, u, v, RG, BA, 16, temp);
@ -482,7 +482,7 @@ static void YuvToRgba4444Line(const uint8_t* y, const uint8_t* u,
} else if (length > 0) {
uint8_t temp[2 * 8] = { 0 };
memcpy(temp, y, length * sizeof(*temp));
#ifdef WEBP_SWAP_16BIT_CSP
#if (WEBP_SWAP_16BIT_CSP == 1)
CALC_RGBA4444(temp, u, v, BA, RG, 8, temp);
#else
CALC_RGBA4444(temp, u, v, RG, BA, 8, temp);
@ -495,11 +495,11 @@ static void YuvToRgb565Line(const uint8_t* y, const uint8_t* u,
const uint8_t* v, uint8_t* dst, int length) {
v16u8 R, G, B, RG, GB, tmp0, tmp1;
while (length >= 16) {
#ifdef WEBP_SWAP_16BIT_CSP
#if (WEBP_SWAP_16BIT_CSP == 1)
CALC_RGB565(y, u, v, GB, RG, 16, dst);
#else
#else
CALC_RGB565(y, u, v, RG, GB, 16, dst);
#endif
#endif
y += 16;
u += 16;
v += 16;
@ -509,7 +509,7 @@ static void YuvToRgb565Line(const uint8_t* y, const uint8_t* u,
if (length > 8) {
uint8_t temp[2 * 16] = { 0 };
memcpy(temp, y, length * sizeof(*temp));
#ifdef WEBP_SWAP_16BIT_CSP
#if (WEBP_SWAP_16BIT_CSP == 1)
CALC_RGB565(temp, u, v, GB, RG, 16, temp);
#else
CALC_RGB565(temp, u, v, RG, GB, 16, temp);
@ -518,7 +518,7 @@ static void YuvToRgb565Line(const uint8_t* y, const uint8_t* u,
} else if (length > 0) {
uint8_t temp[2 * 8] = { 0 };
memcpy(temp, y, length * sizeof(*temp));
#ifdef WEBP_SWAP_16BIT_CSP
#if (WEBP_SWAP_16BIT_CSP == 1)
CALC_RGB565(temp, u, v, GB, RG, 8, temp);
#else
CALC_RGB565(temp, u, v, RG, GB, 8, temp);

53
src/dsp/yuv.c
View File

@ -15,59 +15,6 @@
#include <stdlib.h>
#if defined(WEBP_YUV_USE_TABLE)
static int done = 0;
static WEBP_INLINE uint8_t clip(int v, int max_value) {
return v < 0 ? 0 : v > max_value ? max_value : v;
}
int16_t VP8kVToR[256], VP8kUToB[256];
int32_t VP8kVToG[256], VP8kUToG[256];
uint8_t VP8kClip[YUV_RANGE_MAX - YUV_RANGE_MIN];
uint8_t VP8kClip4Bits[YUV_RANGE_MAX - YUV_RANGE_MIN];
WEBP_TSAN_IGNORE_FUNCTION void VP8YUVInit(void) {
int i;
if (done) {
return;
}
#ifndef USE_YUVj
for (i = 0; i < 256; ++i) {
VP8kVToR[i] = (89858 * (i - 128) + YUV_HALF) >> YUV_FIX;
VP8kUToG[i] = -22014 * (i - 128) + YUV_HALF;
VP8kVToG[i] = -45773 * (i - 128);
VP8kUToB[i] = (113618 * (i - 128) + YUV_HALF) >> YUV_FIX;
}
for (i = YUV_RANGE_MIN; i < YUV_RANGE_MAX; ++i) {
const int k = ((i - 16) * 76283 + YUV_HALF) >> YUV_FIX;
VP8kClip[i - YUV_RANGE_MIN] = clip(k, 255);
VP8kClip4Bits[i - YUV_RANGE_MIN] = clip((k + 8) >> 4, 15);
}
#else
for (i = 0; i < 256; ++i) {
VP8kVToR[i] = (91881 * (i - 128) + YUV_HALF) >> YUV_FIX;
VP8kUToG[i] = -22554 * (i - 128) + YUV_HALF;
VP8kVToG[i] = -46802 * (i - 128);
VP8kUToB[i] = (116130 * (i - 128) + YUV_HALF) >> YUV_FIX;
}
for (i = YUV_RANGE_MIN; i < YUV_RANGE_MAX; ++i) {
const int k = i;
VP8kClip[i - YUV_RANGE_MIN] = clip(k, 255);
VP8kClip4Bits[i - YUV_RANGE_MIN] = clip((k + 8) >> 4, 15);
}
#endif
done = 1;
}
#else
WEBP_TSAN_IGNORE_FUNCTION void VP8YUVInit(void) {}
#endif // WEBP_YUV_USE_TABLE
//-----------------------------------------------------------------------------
// Plain-C version

41
src/dsp/yuv.h
View File

@ -38,16 +38,6 @@
#include "./dsp.h"
#include "../dec/vp8_dec.h"
#if defined(WEBP_EXPERIMENTAL_FEATURES)
// Do NOT activate this feature for real compression. This is only experimental!
// This flag is for comparison purpose against JPEG's "YUVj" natural colorspace.
// This colorspace is close to Rec.601's Y'CbCr model with the notable
// difference of allowing larger range for luma/chroma.
// See http://en.wikipedia.org/wiki/YCbCr#JPEG_conversion paragraph, and its
// difference with http://en.wikipedia.org/wiki/YCbCr#ITU-R_BT.601_conversion
// #define USE_YUVj
#endif
//------------------------------------------------------------------------------
// YUV -> RGB conversion
@ -111,7 +101,7 @@ static WEBP_INLINE void VP8YuvToRgb565(int y, int u, int v,
const int b = VP8YUVToB(y, u); // 5 usable bits
const int rg = (r & 0xf8) | (g >> 5);
const int gb = ((g << 3) & 0xe0) | (b >> 3);
#ifdef WEBP_SWAP_16BIT_CSP
#if (WEBP_SWAP_16BIT_CSP == 1)
rgb[0] = gb;
rgb[1] = rg;
#else
@ -127,7 +117,7 @@ static WEBP_INLINE void VP8YuvToRgba4444(int y, int u, int v,
const int b = VP8YUVToB(y, u); // 4 usable bits
const int rg = (r & 0xf0) | (g >> 4);
const int ba = (b & 0xf0) | 0x0f; // overwrite the lower 4 bits
#ifdef WEBP_SWAP_16BIT_CSP
#if (WEBP_SWAP_16BIT_CSP == 1)
argb[0] = ba;
argb[1] = rg;
#else
@ -157,9 +147,6 @@ static WEBP_INLINE void VP8YuvToRgba(uint8_t y, uint8_t u, uint8_t v,
rgba[3] = 0xff;
}
// Must be called before everything, to initialize the tables.
void VP8YUVInit(void);
//-----------------------------------------------------------------------------
// SSE2 extra functions (mostly for upsampling_sse2.c)
@ -192,8 +179,6 @@ static WEBP_INLINE int VP8ClipUV(int uv, int rounding) {
return ((uv & ~0xff) == 0) ? uv : (uv < 0) ? 0 : 255;
}
#ifndef USE_YUVj
static WEBP_INLINE int VP8RGBToY(int r, int g, int b, int rounding) {
const int luma = 16839 * r + 33059 * g + 6420 * b;
return (luma + rounding + (16 << YUV_FIX)) >> YUV_FIX; // no need to clip
@ -209,28 +194,6 @@ static WEBP_INLINE int VP8RGBToV(int r, int g, int b, int rounding) {
return VP8ClipUV(v, rounding);
}
#else
// This JPEG-YUV colorspace, only for comparison!
// These are also 16bit precision coefficients from Rec.601, but with full
// [0..255] output range.
static WEBP_INLINE int VP8RGBToY(int r, int g, int b, int rounding) {
const int luma = 19595 * r + 38470 * g + 7471 * b;
return (luma + rounding) >> YUV_FIX; // no need to clip
}
static WEBP_INLINE int VP8RGBToU(int r, int g, int b, int rounding) {
const int u = -11058 * r - 21710 * g + 32768 * b;
return VP8ClipUV(u, rounding);
}
static WEBP_INLINE int VP8RGBToV(int r, int g, int b, int rounding) {
const int v = 32768 * r - 27439 * g - 5329 * b;
return VP8ClipUV(v, rounding);
}
#endif // USE_YUVj
#ifdef __cplusplus
} // extern "C"
#endif

4
src/dsp/yuv_sse2.c
View File

@ -119,7 +119,7 @@ static WEBP_INLINE void PackAndStore4444(const __m128i* const R,
const __m128i* const B,
const __m128i* const A,
uint8_t* const dst) {
#if !defined(WEBP_SWAP_16BIT_CSP)
#if (WEBP_SWAP_16BIT_CSP == 0)
const __m128i rg0 = _mm_packus_epi16(*R, *G);
const __m128i ba0 = _mm_packus_epi16(*B, *A);
#else
@ -149,7 +149,7 @@ static WEBP_INLINE void PackAndStore565(const __m128i* const R,
const __m128i g2 = _mm_slli_epi16(_mm_and_si128(g0, _mm_set1_epi8(0x1c)), 3);
const __m128i rg = _mm_or_si128(r1, g1);
const __m128i gb = _mm_or_si128(g2, b1);
#if !defined(WEBP_SWAP_16BIT_CSP)
#if (WEBP_SWAP_16BIT_CSP == 0)
const __m128i rgb565 = _mm_unpacklo_epi8(rg, gb);
#else
const __m128i rgb565 = _mm_unpacklo_epi8(gb, rg);