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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.
- // -----------------------------------------------------------------------------
- //
- // 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_ */
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