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libwebp/src/dsp/upsampling.c
James Zern 0d5fad46cf add WEBP_DSP_INIT / WEBP_DSP_INIT_FUNC 
this internalizes the init checks and provides stronger synchronization
with pthreads when available while still allowing VP8GetCPUInfo to be
modified (mostly for testing purposes). windows is left as is since a
critical section or mutex would cause a leak.

Change-Id: Ieb997e014f2805c0ae39c16f13337663521356f4
(cherry picked from commit d77bf512bd)
2018-04-17 18:01:34 -07:00

328 lines
14 KiB
C
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// Copyright 2011 Google Inc. All Rights Reserved.
//
// Use of this source code is governed by a BSD-style license
// that can be found in the COPYING 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.
// -----------------------------------------------------------------------------
//
// YUV to RGB upsampling functions.
//
// Author: somnath@google.com (Somnath Banerjee)
#include "src/dsp/dsp.h"
#include "src/dsp/yuv.h"
#include <assert.h>
//------------------------------------------------------------------------------
// Fancy upsampler
#ifdef FANCY_UPSAMPLING
// Fancy upsampling functions to convert YUV to RGB
WebPUpsampleLinePairFunc WebPUpsamplers[MODE_LAST];
// Given samples laid out in a square as:
// [a b]
// [c d]
// we interpolate u/v as:
// ([9*a + 3*b + 3*c + d 3*a + 9*b + 3*c + d] + [8 8]) / 16
// ([3*a + b + 9*c + 3*d a + 3*b + 3*c + 9*d] [8 8]) / 16
// We process u and v together stashed into 32bit (16bit each).
#define LOAD_UV(u, v) ((u) | ((v) << 16))
#define UPSAMPLE_FUNC(FUNC_NAME, FUNC, XSTEP) \
static void FUNC_NAME(const uint8_t* top_y, const uint8_t* bottom_y, \
const uint8_t* top_u, const uint8_t* top_v, \
const uint8_t* cur_u, const uint8_t* cur_v, \
uint8_t* top_dst, uint8_t* bottom_dst, int len) { \
int x; \
const int last_pixel_pair = (len - 1) >> 1; \
uint32_t tl_uv = LOAD_UV(top_u[0], top_v[0]); /* top-left sample */ \
uint32_t l_uv = LOAD_UV(cur_u[0], cur_v[0]); /* left-sample */ \
assert(top_y != NULL); \
{ \
const uint32_t uv0 = (3 * tl_uv + l_uv + 0x00020002u) >> 2; \
FUNC(top_y[0], uv0 & 0xff, (uv0 >> 16), top_dst); \
} \
if (bottom_y != NULL) { \
const uint32_t uv0 = (3 * l_uv + tl_uv + 0x00020002u) >> 2; \
FUNC(bottom_y[0], uv0 & 0xff, (uv0 >> 16), bottom_dst); \
} \
for (x = 1; x <= last_pixel_pair; ++x) { \
const uint32_t t_uv = LOAD_UV(top_u[x], top_v[x]); /* top sample */ \
const uint32_t uv = LOAD_UV(cur_u[x], cur_v[x]); /* sample */ \
/* precompute invariant values associated with first and second diagonals*/\
const uint32_t avg = tl_uv + t_uv + l_uv + uv + 0x00080008u; \
const uint32_t diag_12 = (avg + 2 * (t_uv + l_uv)) >> 3; \
const uint32_t diag_03 = (avg + 2 * (tl_uv + uv)) >> 3; \
{ \
const uint32_t uv0 = (diag_12 + tl_uv) >> 1; \
const uint32_t uv1 = (diag_03 + t_uv) >> 1; \
FUNC(top_y[2 * x - 1], uv0 & 0xff, (uv0 >> 16), \
top_dst + (2 * x - 1) * (XSTEP)); \
FUNC(top_y[2 * x - 0], uv1 & 0xff, (uv1 >> 16), \
top_dst + (2 * x - 0) * (XSTEP)); \
} \
if (bottom_y != NULL) { \
const uint32_t uv0 = (diag_03 + l_uv) >> 1; \
const uint32_t uv1 = (diag_12 + uv) >> 1; \
FUNC(bottom_y[2 * x - 1], uv0 & 0xff, (uv0 >> 16), \
bottom_dst + (2 * x - 1) * (XSTEP)); \
FUNC(bottom_y[2 * x + 0], uv1 & 0xff, (uv1 >> 16), \
bottom_dst + (2 * x + 0) * (XSTEP)); \
} \
tl_uv = t_uv; \
l_uv = uv; \
} \
if (!(len & 1)) { \
{ \
const uint32_t uv0 = (3 * tl_uv + l_uv + 0x00020002u) >> 2; \
FUNC(top_y[len - 1], uv0 & 0xff, (uv0 >> 16), \
top_dst + (len - 1) * (XSTEP)); \
} \
if (bottom_y != NULL) { \
const uint32_t uv0 = (3 * l_uv + tl_uv + 0x00020002u) >> 2; \
FUNC(bottom_y[len - 1], uv0 & 0xff, (uv0 >> 16), \
bottom_dst + (len - 1) * (XSTEP)); \
} \
} \
}
// All variants implemented.
#if !WEBP_NEON_OMIT_C_CODE
UPSAMPLE_FUNC(UpsampleRgbaLinePair_C, VP8YuvToRgba, 4)
UPSAMPLE_FUNC(UpsampleBgraLinePair_C, VP8YuvToBgra, 4)
#if !defined(WEBP_REDUCE_CSP)
UPSAMPLE_FUNC(UpsampleArgbLinePair_C, VP8YuvToArgb, 4)
UPSAMPLE_FUNC(UpsampleRgbLinePair_C, VP8YuvToRgb, 3)
UPSAMPLE_FUNC(UpsampleBgrLinePair_C, VP8YuvToBgr, 3)
UPSAMPLE_FUNC(UpsampleRgba4444LinePair_C, VP8YuvToRgba4444, 2)
UPSAMPLE_FUNC(UpsampleRgb565LinePair_C, VP8YuvToRgb565, 2)
#else
static void EmptyUpsampleFunc(const uint8_t* top_y, const uint8_t* bottom_y,
const uint8_t* top_u, const uint8_t* top_v,
const uint8_t* cur_u, const uint8_t* cur_v,
uint8_t* top_dst, uint8_t* bottom_dst, int len) {
(void)top_y;
(void)bottom_y;
(void)top_u;
(void)top_v;
(void)cur_u;
(void)cur_v;
(void)top_dst;
(void)bottom_dst;
(void)len;
assert(0); // COLORSPACE SUPPORT NOT COMPILED
}
#define UpsampleArgbLinePair_C EmptyUpsampleFunc
#define UpsampleRgbLinePair_C EmptyUpsampleFunc
#define UpsampleBgrLinePair_C EmptyUpsampleFunc
#define UpsampleRgba4444LinePair_C EmptyUpsampleFunc
#define UpsampleRgb565LinePair_C EmptyUpsampleFunc
#endif // WEBP_REDUCE_CSP
#endif
#undef LOAD_UV
#undef UPSAMPLE_FUNC
#endif // FANCY_UPSAMPLING
//------------------------------------------------------------------------------
#if !defined(FANCY_UPSAMPLING)
#define DUAL_SAMPLE_FUNC(FUNC_NAME, FUNC) \
static void FUNC_NAME(const uint8_t* top_y, const uint8_t* bot_y, \
const uint8_t* top_u, const uint8_t* top_v, \
const uint8_t* bot_u, const uint8_t* bot_v, \
uint8_t* top_dst, uint8_t* bot_dst, int len) { \
const int half_len = len >> 1; \
int x; \
assert(top_dst != NULL); \
{ \
for (x = 0; x < half_len; ++x) { \
FUNC(top_y[2 * x + 0], top_u[x], top_v[x], top_dst + 8 * x + 0); \
FUNC(top_y[2 * x + 1], top_u[x], top_v[x], top_dst + 8 * x + 4); \
} \
if (len & 1) FUNC(top_y[2 * x + 0], top_u[x], top_v[x], top_dst + 8 * x); \
} \
if (bot_dst != NULL) { \
for (x = 0; x < half_len; ++x) { \
FUNC(bot_y[2 * x + 0], bot_u[x], bot_v[x], bot_dst + 8 * x + 0); \
FUNC(bot_y[2 * x + 1], bot_u[x], bot_v[x], bot_dst + 8 * x + 4); \
} \
if (len & 1) FUNC(bot_y[2 * x + 0], bot_u[x], bot_v[x], bot_dst + 8 * x); \
} \
}
DUAL_SAMPLE_FUNC(DualLineSamplerBGRA, VP8YuvToBgra)
DUAL_SAMPLE_FUNC(DualLineSamplerARGB, VP8YuvToArgb)
#undef DUAL_SAMPLE_FUNC
#endif // !FANCY_UPSAMPLING
WebPUpsampleLinePairFunc WebPGetLinePairConverter(int alpha_is_last) {
WebPInitUpsamplers();
#ifdef FANCY_UPSAMPLING
return WebPUpsamplers[alpha_is_last ? MODE_BGRA : MODE_ARGB];
#else
return (alpha_is_last ? DualLineSamplerBGRA : DualLineSamplerARGB);
#endif
}
//------------------------------------------------------------------------------
// YUV444 converter
#define YUV444_FUNC(FUNC_NAME, FUNC, XSTEP) \
extern void FUNC_NAME(const uint8_t* y, const uint8_t* u, const uint8_t* v, \
uint8_t* dst, int len); \
void FUNC_NAME(const uint8_t* y, const uint8_t* u, const uint8_t* v, \
uint8_t* dst, int len) { \
int i; \
for (i = 0; i < len; ++i) FUNC(y[i], u[i], v[i], &dst[i * (XSTEP)]); \
}
YUV444_FUNC(WebPYuv444ToRgba_C, VP8YuvToRgba, 4)
YUV444_FUNC(WebPYuv444ToBgra_C, VP8YuvToBgra, 4)
#if !defined(WEBP_REDUCE_CSP)
YUV444_FUNC(WebPYuv444ToRgb_C, VP8YuvToRgb, 3)
YUV444_FUNC(WebPYuv444ToBgr_C, VP8YuvToBgr, 3)
YUV444_FUNC(WebPYuv444ToArgb_C, VP8YuvToArgb, 4)
YUV444_FUNC(WebPYuv444ToRgba4444_C, VP8YuvToRgba4444, 2)
YUV444_FUNC(WebPYuv444ToRgb565_C, VP8YuvToRgb565, 2)
#else
static void EmptyYuv444Func(const uint8_t* y,
const uint8_t* u, const uint8_t* v,
uint8_t* dst, int len) {
(void)y;
(void)u;
(void)v;
(void)dst;
(void)len;
}
#define WebPYuv444ToRgb_C EmptyYuv444Func
#define WebPYuv444ToBgr_C EmptyYuv444Func
#define WebPYuv444ToArgb_C EmptyYuv444Func
#define WebPYuv444ToRgba4444_C EmptyYuv444Func
#define WebPYuv444ToRgb565_C EmptyYuv444Func
#endif // WEBP_REDUCE_CSP
#undef YUV444_FUNC
WebPYUV444Converter WebPYUV444Converters[MODE_LAST];
extern void WebPInitYUV444ConvertersMIPSdspR2(void);
extern void WebPInitYUV444ConvertersSSE2(void);
extern void WebPInitYUV444ConvertersSSE41(void);
WEBP_DSP_INIT_FUNC(WebPInitYUV444Converters) {
WebPYUV444Converters[MODE_RGBA] = WebPYuv444ToRgba_C;
WebPYUV444Converters[MODE_BGRA] = WebPYuv444ToBgra_C;
WebPYUV444Converters[MODE_RGB] = WebPYuv444ToRgb_C;
WebPYUV444Converters[MODE_BGR] = WebPYuv444ToBgr_C;
WebPYUV444Converters[MODE_ARGB] = WebPYuv444ToArgb_C;
WebPYUV444Converters[MODE_RGBA_4444] = WebPYuv444ToRgba4444_C;
WebPYUV444Converters[MODE_RGB_565] = WebPYuv444ToRgb565_C;
WebPYUV444Converters[MODE_rgbA] = WebPYuv444ToRgba_C;
WebPYUV444Converters[MODE_bgrA] = WebPYuv444ToBgra_C;
WebPYUV444Converters[MODE_Argb] = WebPYuv444ToArgb_C;
WebPYUV444Converters[MODE_rgbA_4444] = WebPYuv444ToRgba4444_C;
if (VP8GetCPUInfo != NULL) {
#if defined(WEBP_USE_SSE2)
if (VP8GetCPUInfo(kSSE2)) {
WebPInitYUV444ConvertersSSE2();
}
#endif
#if defined(WEBP_USE_SSE41)
if (VP8GetCPUInfo(kSSE4_1)) {
WebPInitYUV444ConvertersSSE41();
}
#endif
#if defined(WEBP_USE_MIPS_DSP_R2)
if (VP8GetCPUInfo(kMIPSdspR2)) {
WebPInitYUV444ConvertersMIPSdspR2();
}
#endif
}
}
//------------------------------------------------------------------------------
// Main calls
extern void WebPInitUpsamplersSSE2(void);
extern void WebPInitUpsamplersSSE41(void);
extern void WebPInitUpsamplersNEON(void);
extern void WebPInitUpsamplersMIPSdspR2(void);
extern void WebPInitUpsamplersMSA(void);
WEBP_DSP_INIT_FUNC(WebPInitUpsamplers) {
#ifdef FANCY_UPSAMPLING
#if !WEBP_NEON_OMIT_C_CODE
WebPUpsamplers[MODE_RGBA] = UpsampleRgbaLinePair_C;
WebPUpsamplers[MODE_BGRA] = UpsampleBgraLinePair_C;
WebPUpsamplers[MODE_rgbA] = UpsampleRgbaLinePair_C;
WebPUpsamplers[MODE_bgrA] = UpsampleBgraLinePair_C;
WebPUpsamplers[MODE_RGB] = UpsampleRgbLinePair_C;
WebPUpsamplers[MODE_BGR] = UpsampleBgrLinePair_C;
WebPUpsamplers[MODE_ARGB] = UpsampleArgbLinePair_C;
WebPUpsamplers[MODE_RGBA_4444] = UpsampleRgba4444LinePair_C;
WebPUpsamplers[MODE_RGB_565] = UpsampleRgb565LinePair_C;
WebPUpsamplers[MODE_Argb] = UpsampleArgbLinePair_C;
WebPUpsamplers[MODE_rgbA_4444] = UpsampleRgba4444LinePair_C;
#endif
// If defined, use CPUInfo() to overwrite some pointers with faster versions.
if (VP8GetCPUInfo != NULL) {
#if defined(WEBP_USE_SSE2)
if (VP8GetCPUInfo(kSSE2)) {
WebPInitUpsamplersSSE2();
}
#endif
#if defined(WEBP_USE_SSE41)
if (VP8GetCPUInfo(kSSE4_1)) {
WebPInitUpsamplersSSE41();
}
#endif
#if defined(WEBP_USE_MIPS_DSP_R2)
if (VP8GetCPUInfo(kMIPSdspR2)) {
WebPInitUpsamplersMIPSdspR2();
}
#endif
#if defined(WEBP_USE_MSA)
if (VP8GetCPUInfo(kMSA)) {
WebPInitUpsamplersMSA();
}
#endif
}
#if defined(WEBP_USE_NEON)
if (WEBP_NEON_OMIT_C_CODE ||
(VP8GetCPUInfo != NULL && VP8GetCPUInfo(kNEON))) {
WebPInitUpsamplersNEON();
}
#endif
assert(WebPUpsamplers[MODE_RGBA] != NULL);
assert(WebPUpsamplers[MODE_BGRA] != NULL);
assert(WebPUpsamplers[MODE_rgbA] != NULL);
assert(WebPUpsamplers[MODE_bgrA] != NULL);
#if !defined(WEBP_REDUCE_CSP) || !WEBP_NEON_OMIT_C_CODE
assert(WebPUpsamplers[MODE_RGB] != NULL);
assert(WebPUpsamplers[MODE_BGR] != NULL);
assert(WebPUpsamplers[MODE_ARGB] != NULL);
assert(WebPUpsamplers[MODE_RGBA_4444] != NULL);
assert(WebPUpsamplers[MODE_RGB_565] != NULL);
assert(WebPUpsamplers[MODE_Argb] != NULL);
assert(WebPUpsamplers[MODE_rgbA_4444] != NULL);
#endif
#endif // FANCY_UPSAMPLING
}
//------------------------------------------------------------------------------
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