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Diffstat (limited to 'src/main/jni/libwebp/dsp/dsp.h')
| -rw-r--r-- | src/main/jni/libwebp/dsp/dsp.h | 293 |
1 files changed, 293 insertions, 0 deletions
diff --git a/src/main/jni/libwebp/dsp/dsp.h b/src/main/jni/libwebp/dsp/dsp.h new file mode 100644 index 000000000..52c44b2dc --- /dev/null +++ b/src/main/jni/libwebp/dsp/dsp.h @@ -0,0 +1,293 @@ +// 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. +// ----------------------------------------------------------------------------- +// +// Speed-critical functions. +// +// Author: Skal (pascal.massimino@gmail.com) + +#ifndef WEBP_DSP_DSP_H_ +#define WEBP_DSP_DSP_H_ + +#ifdef HAVE_CONFIG_H +#include "../webp/config.h" +#endif + +#include "../webp/types.h" + +#ifdef __cplusplus +extern "C" { +#endif + +//------------------------------------------------------------------------------ +// CPU detection + +#if defined(__GNUC__) +# define LOCAL_GCC_VERSION ((__GNUC__ << 8) | __GNUC_MINOR__) +# define LOCAL_GCC_PREREQ(maj, min) \ + (LOCAL_GCC_VERSION >= (((maj) << 8) | (min))) +#else +# define LOCAL_GCC_VERSION 0 +# define LOCAL_GCC_PREREQ(maj, min) 0 +#endif + +#ifdef __clang__ +# define LOCAL_CLANG_VERSION ((__clang_major__ << 8) | __clang_minor__) +# define LOCAL_CLANG_PREREQ(maj, min) \ + (LOCAL_CLANG_VERSION >= (((maj) << 8) | (min))) +#else +# define LOCAL_CLANG_VERSION 0 +# define LOCAL_CLANG_PREREQ(maj, min) 0 +#endif // __clang__ + +#if defined(_MSC_VER) && _MSC_VER > 1310 && \ + (defined(_M_X64) || defined(_M_IX86)) +#define WEBP_MSC_SSE2 // Visual C++ SSE2 targets +#endif + +// WEBP_HAVE_* are used to indicate the presence of the instruction set in dsp +// files without intrinsics, allowing the corresponding Init() to be called. +// Files containing intrinsics will need to be built targeting the instruction +// set so should succeed on one of the earlier tests. +#if defined(__SSE2__) || defined(WEBP_MSC_SSE2) || defined(WEBP_HAVE_SSE2) +#define WEBP_USE_SSE2 +#endif + +#if defined(__AVX2__) || defined(WEBP_HAVE_AVX2) +#define WEBP_USE_AVX2 +#endif + +#if defined(__ANDROID__) && defined(__ARM_ARCH_7A__) +#define WEBP_ANDROID_NEON // Android targets that might support NEON +#endif + +#if defined(__ARM_NEON__) || defined(WEBP_ANDROID_NEON) || defined(__aarch64__) +#define WEBP_USE_NEON +#endif + +#if defined(__mips__) && !defined(__mips64) && (__mips_isa_rev < 6) +#define WEBP_USE_MIPS32 +#if (__mips_isa_rev >= 2) +#define WEBP_USE_MIPS32_R2 +#endif +#endif + +typedef enum { + kSSE2, + kSSE3, + kAVX, + kAVX2, + kNEON, + kMIPS32 +} CPUFeature; +// returns true if the CPU supports the feature. +typedef int (*VP8CPUInfo)(CPUFeature feature); +extern VP8CPUInfo VP8GetCPUInfo; + +//------------------------------------------------------------------------------ +// Encoding + +// Transforms +// VP8Idct: Does one of two inverse transforms. If do_two is set, the transforms +// will be done for (ref, in, dst) and (ref + 4, in + 16, dst + 4). +typedef void (*VP8Idct)(const uint8_t* ref, const int16_t* in, uint8_t* dst, + int do_two); +typedef void (*VP8Fdct)(const uint8_t* src, const uint8_t* ref, int16_t* out); +typedef void (*VP8WHT)(const int16_t* in, int16_t* out); +extern VP8Idct VP8ITransform; +extern VP8Fdct VP8FTransform; +extern VP8WHT VP8FTransformWHT; +// Predictions +// *dst is the destination block. *top and *left can be NULL. +typedef void (*VP8IntraPreds)(uint8_t *dst, const uint8_t* left, + const uint8_t* top); +typedef void (*VP8Intra4Preds)(uint8_t *dst, const uint8_t* top); +extern VP8Intra4Preds VP8EncPredLuma4; +extern VP8IntraPreds VP8EncPredLuma16; +extern VP8IntraPreds VP8EncPredChroma8; + +typedef int (*VP8Metric)(const uint8_t* pix, const uint8_t* ref); +extern VP8Metric VP8SSE16x16, VP8SSE16x8, VP8SSE8x8, VP8SSE4x4; +typedef int (*VP8WMetric)(const uint8_t* pix, const uint8_t* ref, + const uint16_t* const weights); +extern VP8WMetric VP8TDisto4x4, VP8TDisto16x16; + +typedef void (*VP8BlockCopy)(const uint8_t* src, uint8_t* dst); +extern VP8BlockCopy VP8Copy4x4; +// Quantization +struct VP8Matrix; // forward declaration +typedef int (*VP8QuantizeBlock)(int16_t in[16], int16_t out[16], + const struct VP8Matrix* const mtx); +extern VP8QuantizeBlock VP8EncQuantizeBlock; + +// specific to 2nd transform: +typedef int (*VP8QuantizeBlockWHT)(int16_t in[16], int16_t out[16], + const struct VP8Matrix* const mtx); +extern VP8QuantizeBlockWHT VP8EncQuantizeBlockWHT; + +// Collect histogram for susceptibility calculation and accumulate in histo[]. +struct VP8Histogram; +typedef void (*VP8CHisto)(const uint8_t* ref, const uint8_t* pred, + int start_block, int end_block, + struct VP8Histogram* const histo); +extern const int VP8DspScan[16 + 4 + 4]; +extern VP8CHisto VP8CollectHistogram; + +void VP8EncDspInit(void); // must be called before using any of the above + +//------------------------------------------------------------------------------ +// Decoding + +typedef void (*VP8DecIdct)(const int16_t* coeffs, uint8_t* dst); +// when doing two transforms, coeffs is actually int16_t[2][16]. +typedef void (*VP8DecIdct2)(const int16_t* coeffs, uint8_t* dst, int do_two); +extern VP8DecIdct2 VP8Transform; +extern VP8DecIdct VP8TransformAC3; +extern VP8DecIdct VP8TransformUV; +extern VP8DecIdct VP8TransformDC; +extern VP8DecIdct VP8TransformDCUV; +extern VP8WHT VP8TransformWHT; + +// *dst is the destination block, with stride BPS. Boundary samples are +// assumed accessible when needed. +typedef void (*VP8PredFunc)(uint8_t* dst); +extern const VP8PredFunc VP8PredLuma16[/* NUM_B_DC_MODES */]; +extern const VP8PredFunc VP8PredChroma8[/* NUM_B_DC_MODES */]; +extern const VP8PredFunc VP8PredLuma4[/* NUM_BMODES */]; + +// clipping tables (for filtering) +extern const int8_t* const VP8ksclip1; // clips [-1020, 1020] to [-128, 127] +extern const int8_t* const VP8ksclip2; // clips [-112, 112] to [-16, 15] +extern const uint8_t* const VP8kclip1; // clips [-255,511] to [0,255] +extern const uint8_t* const VP8kabs0; // abs(x) for x in [-255,255] +void VP8InitClipTables(void); // must be called first + +// simple filter (only for luma) +typedef void (*VP8SimpleFilterFunc)(uint8_t* p, int stride, int thresh); +extern VP8SimpleFilterFunc VP8SimpleVFilter16; +extern VP8SimpleFilterFunc VP8SimpleHFilter16; +extern VP8SimpleFilterFunc VP8SimpleVFilter16i; // filter 3 inner edges +extern VP8SimpleFilterFunc VP8SimpleHFilter16i; + +// regular filter (on both macroblock edges and inner edges) +typedef void (*VP8LumaFilterFunc)(uint8_t* luma, int stride, + int thresh, int ithresh, int hev_t); +typedef void (*VP8ChromaFilterFunc)(uint8_t* u, uint8_t* v, int stride, + int thresh, int ithresh, int hev_t); +// on outer edge +extern VP8LumaFilterFunc VP8VFilter16; +extern VP8LumaFilterFunc VP8HFilter16; +extern VP8ChromaFilterFunc VP8VFilter8; +extern VP8ChromaFilterFunc VP8HFilter8; + +// on inner edge +extern VP8LumaFilterFunc VP8VFilter16i; // filtering 3 inner edges altogether +extern VP8LumaFilterFunc VP8HFilter16i; +extern VP8ChromaFilterFunc VP8VFilter8i; // filtering u and v altogether +extern VP8ChromaFilterFunc VP8HFilter8i; + +// must be called before anything using the above +void VP8DspInit(void); + +//------------------------------------------------------------------------------ +// WebP I/O + +#define FANCY_UPSAMPLING // undefined to remove fancy upsampling support + +// Convert a pair of y/u/v lines together to the output rgb/a colorspace. +// bottom_y can be NULL if only one line of output is needed (at top/bottom). +typedef void (*WebPUpsampleLinePairFunc)( + 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); + +#ifdef FANCY_UPSAMPLING + +// Fancy upsampling functions to convert YUV to RGB(A) modes +extern WebPUpsampleLinePairFunc WebPUpsamplers[/* MODE_LAST */]; + +#endif // FANCY_UPSAMPLING + +// Per-row point-sampling methods. +typedef void (*WebPSamplerRowFunc)(const uint8_t* y, + const uint8_t* u, const uint8_t* v, + uint8_t* dst, int len); +// Generic function to apply 'WebPSamplerRowFunc' to the whole plane: +void WebPSamplerProcessPlane(const uint8_t* y, int y_stride, + const uint8_t* u, const uint8_t* v, int uv_stride, + uint8_t* dst, int dst_stride, + int width, int height, WebPSamplerRowFunc func); + +// Sampling functions to convert rows of YUV to RGB(A) +extern WebPSamplerRowFunc WebPSamplers[/* MODE_LAST */]; + +// General function for converting two lines of ARGB or RGBA. +// 'alpha_is_last' should be true if 0xff000000 is stored in memory as +// as 0x00, 0x00, 0x00, 0xff (little endian). +WebPUpsampleLinePairFunc WebPGetLinePairConverter(int alpha_is_last); + +// YUV444->RGB converters +typedef void (*WebPYUV444Converter)(const uint8_t* y, + const uint8_t* u, const uint8_t* v, + uint8_t* dst, int len); + +extern const WebPYUV444Converter WebPYUV444Converters[/* MODE_LAST */]; + +// Must be called before using the WebPUpsamplers[] (and for premultiplied +// colorspaces like rgbA, rgbA4444, etc) +void WebPInitUpsamplers(void); +// Must be called before using WebPSamplers[] +void WebPInitSamplers(void); + +//------------------------------------------------------------------------------ +// Utilities for processing transparent channel. + +// Apply alpha pre-multiply on an rgba, bgra or argb plane of size w * h. +// alpha_first should be 0 for argb, 1 for rgba or bgra (where alpha is last). +extern void (*WebPApplyAlphaMultiply)( + uint8_t* rgba, int alpha_first, int w, int h, int stride); + +// Same, buf specifically for RGBA4444 format +extern void (*WebPApplyAlphaMultiply4444)( + uint8_t* rgba4444, int w, int h, int stride); + +// Extract the alpha values from 32b values in argb[] and pack them into alpha[] +// (this is the opposite of WebPDispatchAlpha). +// Returns true if there's only trivial 0xff alpha values. +extern int (*WebPExtractAlpha)(const uint8_t* argb, int argb_stride, + int width, int height, + uint8_t* alpha, int alpha_stride); + +// Pre-Multiply operation transforms x into x * A / 255 (where x=Y,R,G or B). +// Un-Multiply operation transforms x into x * 255 / A. + +// Pre-Multiply or Un-Multiply (if 'inverse' is true) argb values in a row. +extern void (*WebPMultARGBRow)(uint32_t* const ptr, int width, int inverse); + +// Same a WebPMultARGBRow(), but for several rows. +void WebPMultARGBRows(uint8_t* ptr, int stride, int width, int num_rows, + int inverse); + +// Same for a row of single values, with side alpha values. +extern void (*WebPMultRow)(uint8_t* const ptr, const uint8_t* const alpha, + int width, int inverse); + +// Same a WebPMultRow(), but for several 'num_rows' rows. +void WebPMultRows(uint8_t* ptr, int stride, + const uint8_t* alpha, int alpha_stride, + int width, int num_rows, int inverse); + +// To be called first before using the above. +void WebPInitAlphaProcessing(void); + +#ifdef __cplusplus +} // extern "C" +#endif + +#endif /* WEBP_DSP_DSP_H_ */ |