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210 lines
7.6 KiB
210 lines
7.6 KiB
// Copyright 2011 Google Inc. All Rights Reserved. |
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// |
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// This code is licensed under the same terms as WebM: |
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// Software License Agreement: http://www.webmproject.org/license/software/ |
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// Additional IP Rights Grant: http://www.webmproject.org/license/additional/ |
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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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#include "../webp/types.h" |
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#if defined(__cplusplus) || defined(c_plusplus) |
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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(_MSC_VER) && (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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#if defined(__SSE2__) || defined(WEBP_MSC_SSE2) |
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#define WEBP_USE_SSE2 |
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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) |
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#define WEBP_USE_NEON |
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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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kNEON |
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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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int VP8GetAlpha(const int histo[]); |
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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 VP8ITransformWHT; |
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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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int n, const struct VP8Matrix* const mtx); |
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extern VP8QuantizeBlock VP8EncQuantizeBlock; |
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// Compute susceptibility based on DCT-coeff histograms: |
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// the higher, the "easier" the macroblock is to compress. |
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typedef int (*VP8CHisto)(const uint8_t* ref, const uint8_t* pred, |
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int start_block, int end_block); |
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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 VP8TransformUV; |
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extern VP8DecIdct VP8TransformDC; |
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extern VP8DecIdct VP8TransformDCUV; |
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extern void (*VP8TransformWHT)(const int16_t* in, int16_t* out); |
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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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// 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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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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// Initializes SSE2 version of the fancy upsamplers. |
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void WebPInitUpsamplersSSE2(void); |
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#endif // FANCY_UPSAMPLING |
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// Point-sampling methods. |
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typedef void (*WebPSampleLinePairFunc)( |
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const uint8_t* top_y, const uint8_t* bottom_y, |
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const uint8_t* u, const uint8_t* v, |
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uint8_t* top_dst, uint8_t* bottom_dst, int len); |
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extern const WebPSampleLinePairFunc 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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// Main function to be called |
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void WebPInitUpsamplers(void); |
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//------------------------------------------------------------------------------ |
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// Pre-multiply planes with alpha values |
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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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// To be called first before using the above. |
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void WebPInitPremultiply(void); |
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void WebPInitPremultiplySSE2(void); // should not be called directly. |
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//------------------------------------------------------------------------------ |
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#if defined(__cplusplus) || defined(c_plusplus) |
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} // extern "C" |
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#endif |
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#endif /* WEBP_DSP_DSP_H_ */
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