1 // Copyright 2011 Google Inc. All Rights Reserved. 2 // 3 // This code is licensed under the same terms as WebM: 4 // Software License Agreement: http://www.webmproject.org/license/software/ 5 // Additional IP Rights Grant: http://www.webmproject.org/license/additional/ 6 // ----------------------------------------------------------------------------- 7 // 8 // Speed-critical functions. 9 // 10 // Author: Skal (pascal.massimino (at) gmail.com) 11 12 #ifndef WEBP_DSP_DSP_H_ 13 #define WEBP_DSP_DSP_H_ 14 15 #include "webp/types.h" 16 17 #if defined(__cplusplus) || defined(c_plusplus) 18 extern "C" { 19 #endif 20 21 //------------------------------------------------------------------------------ 22 // CPU detection 23 24 #if defined(_MSC_VER) && (defined(_M_X64) || defined(_M_IX86)) 25 #define WEBP_MSC_SSE2 // Visual C++ SSE2 targets 26 #endif 27 28 #if defined(__SSE2__) || defined(WEBP_MSC_SSE2) 29 #define WEBP_USE_SSE2 30 #endif 31 32 #if defined(__ANDROID__) && defined(__ARM_ARCH_7A__) && defined(__ARM_NEON__) 33 #define WEBP_ANDROID_NEON // Android targets that might support NEON 34 #endif 35 36 #if defined(__ARM_NEON__) || defined(WEBP_ANDROID_NEON) 37 #define WEBP_USE_NEON 38 #endif 39 40 typedef enum { 41 kSSE2, 42 kSSE3, 43 kNEON 44 } CPUFeature; 45 // returns true if the CPU supports the feature. 46 typedef int (*VP8CPUInfo)(CPUFeature feature); 47 extern VP8CPUInfo VP8GetCPUInfo; 48 49 //------------------------------------------------------------------------------ 50 // Encoding 51 52 int VP8GetAlpha(const int histo[]); 53 54 // Transforms 55 // VP8Idct: Does one of two inverse transforms. If do_two is set, the transforms 56 // will be done for (ref, in, dst) and (ref + 4, in + 16, dst + 4). 57 typedef void (*VP8Idct)(const uint8_t* ref, const int16_t* in, uint8_t* dst, 58 int do_two); 59 typedef void (*VP8Fdct)(const uint8_t* src, const uint8_t* ref, int16_t* out); 60 typedef void (*VP8WHT)(const int16_t* in, int16_t* out); 61 extern VP8Idct VP8ITransform; 62 extern VP8Fdct VP8FTransform; 63 extern VP8WHT VP8ITransformWHT; 64 extern VP8WHT VP8FTransformWHT; 65 // Predictions 66 // *dst is the destination block. *top and *left can be NULL. 67 typedef void (*VP8IntraPreds)(uint8_t *dst, const uint8_t* left, 68 const uint8_t* top); 69 typedef void (*VP8Intra4Preds)(uint8_t *dst, const uint8_t* top); 70 extern VP8Intra4Preds VP8EncPredLuma4; 71 extern VP8IntraPreds VP8EncPredLuma16; 72 extern VP8IntraPreds VP8EncPredChroma8; 73 74 typedef int (*VP8Metric)(const uint8_t* pix, const uint8_t* ref); 75 extern VP8Metric VP8SSE16x16, VP8SSE16x8, VP8SSE8x8, VP8SSE4x4; 76 typedef int (*VP8WMetric)(const uint8_t* pix, const uint8_t* ref, 77 const uint16_t* const weights); 78 extern VP8WMetric VP8TDisto4x4, VP8TDisto16x16; 79 80 typedef void (*VP8BlockCopy)(const uint8_t* src, uint8_t* dst); 81 extern VP8BlockCopy VP8Copy4x4; 82 // Quantization 83 struct VP8Matrix; // forward declaration 84 typedef int (*VP8QuantizeBlock)(int16_t in[16], int16_t out[16], 85 int n, const struct VP8Matrix* const mtx); 86 extern VP8QuantizeBlock VP8EncQuantizeBlock; 87 88 // Compute susceptibility based on DCT-coeff histograms: 89 // the higher, the "easier" the macroblock is to compress. 90 typedef int (*VP8CHisto)(const uint8_t* ref, const uint8_t* pred, 91 int start_block, int end_block); 92 extern const int VP8DspScan[16 + 4 + 4]; 93 extern VP8CHisto VP8CollectHistogram; 94 95 void VP8EncDspInit(void); // must be called before using any of the above 96 97 //------------------------------------------------------------------------------ 98 // Decoding 99 100 typedef void (*VP8DecIdct)(const int16_t* coeffs, uint8_t* dst); 101 // when doing two transforms, coeffs is actually int16_t[2][16]. 102 typedef void (*VP8DecIdct2)(const int16_t* coeffs, uint8_t* dst, int do_two); 103 extern VP8DecIdct2 VP8Transform; 104 extern VP8DecIdct VP8TransformUV; 105 extern VP8DecIdct VP8TransformDC; 106 extern VP8DecIdct VP8TransformDCUV; 107 extern void (*VP8TransformWHT)(const int16_t* in, int16_t* out); 108 109 // *dst is the destination block, with stride BPS. Boundary samples are 110 // assumed accessible when needed. 111 typedef void (*VP8PredFunc)(uint8_t* dst); 112 extern const VP8PredFunc VP8PredLuma16[/* NUM_B_DC_MODES */]; 113 extern const VP8PredFunc VP8PredChroma8[/* NUM_B_DC_MODES */]; 114 extern const VP8PredFunc VP8PredLuma4[/* NUM_BMODES */]; 115 116 // simple filter (only for luma) 117 typedef void (*VP8SimpleFilterFunc)(uint8_t* p, int stride, int thresh); 118 extern VP8SimpleFilterFunc VP8SimpleVFilter16; 119 extern VP8SimpleFilterFunc VP8SimpleHFilter16; 120 extern VP8SimpleFilterFunc VP8SimpleVFilter16i; // filter 3 inner edges 121 extern VP8SimpleFilterFunc VP8SimpleHFilter16i; 122 123 // regular filter (on both macroblock edges and inner edges) 124 typedef void (*VP8LumaFilterFunc)(uint8_t* luma, int stride, 125 int thresh, int ithresh, int hev_t); 126 typedef void (*VP8ChromaFilterFunc)(uint8_t* u, uint8_t* v, int stride, 127 int thresh, int ithresh, int hev_t); 128 // on outer edge 129 extern VP8LumaFilterFunc VP8VFilter16; 130 extern VP8LumaFilterFunc VP8HFilter16; 131 extern VP8ChromaFilterFunc VP8VFilter8; 132 extern VP8ChromaFilterFunc VP8HFilter8; 133 134 // on inner edge 135 extern VP8LumaFilterFunc VP8VFilter16i; // filtering 3 inner edges altogether 136 extern VP8LumaFilterFunc VP8HFilter16i; 137 extern VP8ChromaFilterFunc VP8VFilter8i; // filtering u and v altogether 138 extern VP8ChromaFilterFunc VP8HFilter8i; 139 140 // must be called before anything using the above 141 void VP8DspInit(void); 142 143 //------------------------------------------------------------------------------ 144 // WebP I/O 145 146 #define FANCY_UPSAMPLING // undefined to remove fancy upsampling support 147 148 typedef void (*WebPUpsampleLinePairFunc)( 149 const uint8_t* top_y, const uint8_t* bottom_y, 150 const uint8_t* top_u, const uint8_t* top_v, 151 const uint8_t* cur_u, const uint8_t* cur_v, 152 uint8_t* top_dst, uint8_t* bottom_dst, int len); 153 154 #ifdef FANCY_UPSAMPLING 155 156 // Fancy upsampling functions to convert YUV to RGB(A) modes 157 extern WebPUpsampleLinePairFunc WebPUpsamplers[/* MODE_LAST */]; 158 159 // Initializes SSE2 version of the fancy upsamplers. 160 void WebPInitUpsamplersSSE2(void); 161 162 #endif // FANCY_UPSAMPLING 163 164 // Point-sampling methods. 165 typedef void (*WebPSampleLinePairFunc)( 166 const uint8_t* top_y, const uint8_t* bottom_y, 167 const uint8_t* u, const uint8_t* v, 168 uint8_t* top_dst, uint8_t* bottom_dst, int len); 169 170 extern const WebPSampleLinePairFunc WebPSamplers[/* MODE_LAST */]; 171 172 // General function for converting two lines of ARGB or RGBA. 173 // 'alpha_is_last' should be true if 0xff000000 is stored in memory as 174 // as 0x00, 0x00, 0x00, 0xff (little endian). 175 WebPUpsampleLinePairFunc WebPGetLinePairConverter(int alpha_is_last); 176 177 // YUV444->RGB converters 178 typedef void (*WebPYUV444Converter)(const uint8_t* y, 179 const uint8_t* u, const uint8_t* v, 180 uint8_t* dst, int len); 181 182 extern const WebPYUV444Converter WebPYUV444Converters[/* MODE_LAST */]; 183 184 // Main function to be called 185 void WebPInitUpsamplers(void); 186 187 //------------------------------------------------------------------------------ 188 // Pre-multiply planes with alpha values 189 190 // Apply alpha pre-multiply on an rgba, bgra or argb plane of size w * h. 191 // alpha_first should be 0 for argb, 1 for rgba or bgra (where alpha is last). 192 extern void (*WebPApplyAlphaMultiply)( 193 uint8_t* rgba, int alpha_first, int w, int h, int stride); 194 195 // Same, buf specifically for RGBA4444 format 196 extern void (*WebPApplyAlphaMultiply4444)( 197 uint8_t* rgba4444, int w, int h, int stride); 198 199 // To be called first before using the above. 200 void WebPInitPremultiply(void); 201 202 void WebPInitPremultiplySSE2(void); // should not be called directly. 203 204 //------------------------------------------------------------------------------ 205 206 #if defined(__cplusplus) || defined(c_plusplus) 207 } // extern "C" 208 #endif 209 210 #endif /* WEBP_DSP_DSP_H_ */ 211
