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293 lines
11 KiB
C
293 lines
11 KiB
C
// Copyright 2011 Google Inc. All Rights Reserved.
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//
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// Use of this source code is governed by a BSD-style license
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// that can be found in the COPYING file in the root of the source
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// tree. An additional intellectual property rights grant can be found
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// in the file PATENTS. All contributing project authors may
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// be found in the AUTHORS file in the root of the source tree.
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// -----------------------------------------------------------------------------
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//
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// Speed-critical functions.
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//
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// Author: Skal (pascal.massimino@gmail.com)
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#ifndef WEBP_DSP_DSP_H_
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#define WEBP_DSP_DSP_H_
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#ifdef HAVE_CONFIG_H
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#include "../webp/config.h"
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#endif
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#include "../webp/types.h"
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#ifdef __cplusplus
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extern "C" {
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#endif
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//------------------------------------------------------------------------------
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// CPU detection
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#if defined(__GNUC__)
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# define LOCAL_GCC_VERSION ((__GNUC__ << 8) | __GNUC_MINOR__)
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# define LOCAL_GCC_PREREQ(maj, min) \
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(LOCAL_GCC_VERSION >= (((maj) << 8) | (min)))
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#else
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# define LOCAL_GCC_VERSION 0
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# define LOCAL_GCC_PREREQ(maj, min) 0
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#endif
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#ifdef __clang__
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# define LOCAL_CLANG_VERSION ((__clang_major__ << 8) | __clang_minor__)
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# define LOCAL_CLANG_PREREQ(maj, min) \
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(LOCAL_CLANG_VERSION >= (((maj) << 8) | (min)))
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#else
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# define LOCAL_CLANG_VERSION 0
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# define LOCAL_CLANG_PREREQ(maj, min) 0
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#endif // __clang__
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#if defined(_MSC_VER) && _MSC_VER > 1310 && \
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(defined(_M_X64) || defined(_M_IX86))
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#define WEBP_MSC_SSE2 // Visual C++ SSE2 targets
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#endif
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// WEBP_HAVE_* are used to indicate the presence of the instruction set in dsp
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// files without intrinsics, allowing the corresponding Init() to be called.
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// Files containing intrinsics will need to be built targeting the instruction
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// set so should succeed on one of the earlier tests.
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#if defined(__SSE2__) || defined(WEBP_MSC_SSE2) || defined(WEBP_HAVE_SSE2)
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#define WEBP_USE_SSE2
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#endif
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#if defined(__AVX2__) || defined(WEBP_HAVE_AVX2)
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#define WEBP_USE_AVX2
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#endif
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#if defined(__ANDROID__) && defined(__ARM_ARCH_7A__)
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#define WEBP_ANDROID_NEON // Android targets that might support NEON
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#endif
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#if defined(__ARM_NEON__) || defined(WEBP_ANDROID_NEON) || defined(__aarch64__)
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#define WEBP_USE_NEON
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#endif
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#if defined(__mips__) && !defined(__mips64) && (__mips_isa_rev < 6)
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#define WEBP_USE_MIPS32
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#if (__mips_isa_rev >= 2)
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#define WEBP_USE_MIPS32_R2
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#endif
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#endif
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typedef enum {
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kSSE2,
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kSSE3,
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kAVX,
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kAVX2,
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kNEON,
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kMIPS32
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} CPUFeature;
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// returns true if the CPU supports the feature.
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typedef int (*VP8CPUInfo)(CPUFeature feature);
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extern VP8CPUInfo VP8GetCPUInfo;
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//------------------------------------------------------------------------------
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// Encoding
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// Transforms
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// VP8Idct: Does one of two inverse transforms. If do_two is set, the transforms
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// will be done for (ref, in, dst) and (ref + 4, in + 16, dst + 4).
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typedef void (*VP8Idct)(const uint8_t* ref, const int16_t* in, uint8_t* dst,
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int do_two);
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typedef void (*VP8Fdct)(const uint8_t* src, const uint8_t* ref, int16_t* out);
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typedef void (*VP8WHT)(const int16_t* in, int16_t* out);
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extern VP8Idct VP8ITransform;
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extern VP8Fdct VP8FTransform;
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extern VP8WHT VP8FTransformWHT;
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// Predictions
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// *dst is the destination block. *top and *left can be NULL.
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typedef void (*VP8IntraPreds)(uint8_t *dst, const uint8_t* left,
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const uint8_t* top);
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typedef void (*VP8Intra4Preds)(uint8_t *dst, const uint8_t* top);
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extern VP8Intra4Preds VP8EncPredLuma4;
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extern VP8IntraPreds VP8EncPredLuma16;
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extern VP8IntraPreds VP8EncPredChroma8;
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typedef int (*VP8Metric)(const uint8_t* pix, const uint8_t* ref);
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extern VP8Metric VP8SSE16x16, VP8SSE16x8, VP8SSE8x8, VP8SSE4x4;
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typedef int (*VP8WMetric)(const uint8_t* pix, const uint8_t* ref,
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const uint16_t* const weights);
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extern VP8WMetric VP8TDisto4x4, VP8TDisto16x16;
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typedef void (*VP8BlockCopy)(const uint8_t* src, uint8_t* dst);
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extern VP8BlockCopy VP8Copy4x4;
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// Quantization
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struct VP8Matrix; // forward declaration
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typedef int (*VP8QuantizeBlock)(int16_t in[16], int16_t out[16],
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const struct VP8Matrix* const mtx);
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extern VP8QuantizeBlock VP8EncQuantizeBlock;
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// specific to 2nd transform:
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typedef int (*VP8QuantizeBlockWHT)(int16_t in[16], int16_t out[16],
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const struct VP8Matrix* const mtx);
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extern VP8QuantizeBlockWHT VP8EncQuantizeBlockWHT;
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// Collect histogram for susceptibility calculation and accumulate in histo[].
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struct VP8Histogram;
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typedef void (*VP8CHisto)(const uint8_t* ref, const uint8_t* pred,
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int start_block, int end_block,
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struct VP8Histogram* const histo);
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extern const int VP8DspScan[16 + 4 + 4];
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extern VP8CHisto VP8CollectHistogram;
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void VP8EncDspInit(void); // must be called before using any of the above
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//------------------------------------------------------------------------------
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// Decoding
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typedef void (*VP8DecIdct)(const int16_t* coeffs, uint8_t* dst);
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// when doing two transforms, coeffs is actually int16_t[2][16].
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typedef void (*VP8DecIdct2)(const int16_t* coeffs, uint8_t* dst, int do_two);
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extern VP8DecIdct2 VP8Transform;
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extern VP8DecIdct VP8TransformAC3;
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extern VP8DecIdct VP8TransformUV;
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extern VP8DecIdct VP8TransformDC;
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extern VP8DecIdct VP8TransformDCUV;
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extern VP8WHT VP8TransformWHT;
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// *dst is the destination block, with stride BPS. Boundary samples are
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// assumed accessible when needed.
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typedef void (*VP8PredFunc)(uint8_t* dst);
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extern const VP8PredFunc VP8PredLuma16[/* NUM_B_DC_MODES */];
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extern const VP8PredFunc VP8PredChroma8[/* NUM_B_DC_MODES */];
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extern const VP8PredFunc VP8PredLuma4[/* NUM_BMODES */];
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// clipping tables (for filtering)
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extern const int8_t* const VP8ksclip1; // clips [-1020, 1020] to [-128, 127]
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extern const int8_t* const VP8ksclip2; // clips [-112, 112] to [-16, 15]
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extern const uint8_t* const VP8kclip1; // clips [-255,511] to [0,255]
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extern const uint8_t* const VP8kabs0; // abs(x) for x in [-255,255]
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void VP8InitClipTables(void); // must be called first
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// simple filter (only for luma)
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typedef void (*VP8SimpleFilterFunc)(uint8_t* p, int stride, int thresh);
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extern VP8SimpleFilterFunc VP8SimpleVFilter16;
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extern VP8SimpleFilterFunc VP8SimpleHFilter16;
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extern VP8SimpleFilterFunc VP8SimpleVFilter16i; // filter 3 inner edges
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extern VP8SimpleFilterFunc VP8SimpleHFilter16i;
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// regular filter (on both macroblock edges and inner edges)
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typedef void (*VP8LumaFilterFunc)(uint8_t* luma, int stride,
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int thresh, int ithresh, int hev_t);
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typedef void (*VP8ChromaFilterFunc)(uint8_t* u, uint8_t* v, int stride,
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int thresh, int ithresh, int hev_t);
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// on outer edge
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extern VP8LumaFilterFunc VP8VFilter16;
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extern VP8LumaFilterFunc VP8HFilter16;
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extern VP8ChromaFilterFunc VP8VFilter8;
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extern VP8ChromaFilterFunc VP8HFilter8;
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// on inner edge
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extern VP8LumaFilterFunc VP8VFilter16i; // filtering 3 inner edges altogether
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extern VP8LumaFilterFunc VP8HFilter16i;
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extern VP8ChromaFilterFunc VP8VFilter8i; // filtering u and v altogether
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extern VP8ChromaFilterFunc VP8HFilter8i;
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// must be called before anything using the above
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void VP8DspInit(void);
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//------------------------------------------------------------------------------
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// WebP I/O
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#define FANCY_UPSAMPLING // undefined to remove fancy upsampling support
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// Convert a pair of y/u/v lines together to the output rgb/a colorspace.
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// bottom_y can be NULL if only one line of output is needed (at top/bottom).
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typedef void (*WebPUpsampleLinePairFunc)(
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const uint8_t* top_y, const uint8_t* bottom_y,
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const uint8_t* top_u, const uint8_t* top_v,
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const uint8_t* cur_u, const uint8_t* cur_v,
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uint8_t* top_dst, uint8_t* bottom_dst, int len);
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#ifdef FANCY_UPSAMPLING
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// Fancy upsampling functions to convert YUV to RGB(A) modes
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extern WebPUpsampleLinePairFunc WebPUpsamplers[/* MODE_LAST */];
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#endif // FANCY_UPSAMPLING
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// Per-row point-sampling methods.
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typedef void (*WebPSamplerRowFunc)(const uint8_t* y,
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const uint8_t* u, const uint8_t* v,
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uint8_t* dst, int len);
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// Generic function to apply 'WebPSamplerRowFunc' to the whole plane:
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void WebPSamplerProcessPlane(const uint8_t* y, int y_stride,
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const uint8_t* u, const uint8_t* v, int uv_stride,
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uint8_t* dst, int dst_stride,
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int width, int height, WebPSamplerRowFunc func);
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// Sampling functions to convert rows of YUV to RGB(A)
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extern WebPSamplerRowFunc WebPSamplers[/* MODE_LAST */];
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// General function for converting two lines of ARGB or RGBA.
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// 'alpha_is_last' should be true if 0xff000000 is stored in memory as
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// as 0x00, 0x00, 0x00, 0xff (little endian).
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WebPUpsampleLinePairFunc WebPGetLinePairConverter(int alpha_is_last);
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// YUV444->RGB converters
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typedef void (*WebPYUV444Converter)(const uint8_t* y,
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const uint8_t* u, const uint8_t* v,
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uint8_t* dst, int len);
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extern const WebPYUV444Converter WebPYUV444Converters[/* MODE_LAST */];
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// Must be called before using the WebPUpsamplers[] (and for premultiplied
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// colorspaces like rgbA, rgbA4444, etc)
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void WebPInitUpsamplers(void);
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// Must be called before using WebPSamplers[]
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void WebPInitSamplers(void);
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//------------------------------------------------------------------------------
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// Utilities for processing transparent channel.
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// Apply alpha pre-multiply on an rgba, bgra or argb plane of size w * h.
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// alpha_first should be 0 for argb, 1 for rgba or bgra (where alpha is last).
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extern void (*WebPApplyAlphaMultiply)(
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uint8_t* rgba, int alpha_first, int w, int h, int stride);
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// Same, buf specifically for RGBA4444 format
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extern void (*WebPApplyAlphaMultiply4444)(
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uint8_t* rgba4444, int w, int h, int stride);
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// Extract the alpha values from 32b values in argb[] and pack them into alpha[]
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// (this is the opposite of WebPDispatchAlpha).
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// Returns true if there's only trivial 0xff alpha values.
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extern int (*WebPExtractAlpha)(const uint8_t* argb, int argb_stride,
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int width, int height,
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uint8_t* alpha, int alpha_stride);
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// Pre-Multiply operation transforms x into x * A / 255 (where x=Y,R,G or B).
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// Un-Multiply operation transforms x into x * 255 / A.
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// Pre-Multiply or Un-Multiply (if 'inverse' is true) argb values in a row.
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extern void (*WebPMultARGBRow)(uint32_t* const ptr, int width, int inverse);
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// Same a WebPMultARGBRow(), but for several rows.
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void WebPMultARGBRows(uint8_t* ptr, int stride, int width, int num_rows,
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int inverse);
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// Same for a row of single values, with side alpha values.
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extern void (*WebPMultRow)(uint8_t* const ptr, const uint8_t* const alpha,
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int width, int inverse);
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// Same a WebPMultRow(), but for several 'num_rows' rows.
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void WebPMultRows(uint8_t* ptr, int stride,
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const uint8_t* alpha, int alpha_stride,
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int width, int num_rows, int inverse);
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// To be called first before using the above.
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void WebPInitAlphaProcessing(void);
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#ifdef __cplusplus
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} // extern "C"
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#endif
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#endif /* WEBP_DSP_DSP_H_ */
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