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-rw-r--r--media/libwebp/src/dsp/upsampling.c327
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diff --git a/media/libwebp/src/dsp/upsampling.c b/media/libwebp/src/dsp/upsampling.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_HAVE_SSE2)
+ if (VP8GetCPUInfo(kSSE2)) {
+ WebPInitYUV444ConvertersSSE2();
+ }
+#endif
+#if defined(WEBP_HAVE_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_HAVE_SSE2)
+ if (VP8GetCPUInfo(kSSE2)) {
+ WebPInitUpsamplersSSE2();
+ }
+#endif
+#if defined(WEBP_HAVE_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_HAVE_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
+}
+
+//------------------------------------------------------------------------------