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Diffstat (limited to 'thirdparty/libwebp/dsp/dsp.h')
| -rw-r--r-- | thirdparty/libwebp/dsp/dsp.h | 594 |
1 files changed, 0 insertions, 594 deletions
diff --git a/thirdparty/libwebp/dsp/dsp.h b/thirdparty/libwebp/dsp/dsp.h deleted file mode 100644 index 813fed4a35..0000000000 --- a/thirdparty/libwebp/dsp/dsp.h +++ /dev/null @@ -1,594 +0,0 @@ -// 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 - -#define BPS 32 // this is the common stride for enc/dec - -//------------------------------------------------------------------------------ -// 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 - -#ifndef __has_builtin -# define __has_builtin(x) 0 -#endif - -#if defined(_MSC_VER) && _MSC_VER > 1310 && \ - (defined(_M_X64) || defined(_M_IX86)) -#define WEBP_MSC_SSE2 // Visual C++ SSE2 targets -#endif - -#if defined(_MSC_VER) && _MSC_VER >= 1500 && \ - (defined(_M_X64) || defined(_M_IX86)) -#define WEBP_MSC_SSE41 // Visual C++ SSE4.1 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(__SSE4_1__) || defined(WEBP_MSC_SSE41) || defined(WEBP_HAVE_SSE41) -#define WEBP_USE_SSE41 -#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 - -// The intrinsics currently cause compiler errors with arm-nacl-gcc and the -// inline assembly would need to be modified for use with Native Client. -#if (defined(__ARM_NEON__) || defined(WEBP_ANDROID_NEON) || \ - defined(__aarch64__) || defined(WEBP_HAVE_NEON)) && \ - !defined(__native_client__) -#define WEBP_USE_NEON -#endif - -#if defined(_MSC_VER) && _MSC_VER >= 1700 && defined(_M_ARM) -#define WEBP_USE_NEON -#define WEBP_USE_INTRINSICS -#endif - -#if defined(__mips__) && !defined(__mips64) && \ - defined(__mips_isa_rev) && (__mips_isa_rev >= 1) && (__mips_isa_rev < 6) -#define WEBP_USE_MIPS32 -#if (__mips_isa_rev >= 2) -#define WEBP_USE_MIPS32_R2 -#if defined(__mips_dspr2) || (__mips_dsp_rev >= 2) -#define WEBP_USE_MIPS_DSP_R2 -#endif -#endif -#endif - -#if defined(__mips_msa) && defined(__mips_isa_rev) && (__mips_isa_rev >= 5) -#define WEBP_USE_MSA -#endif - -// This macro prevents thread_sanitizer from reporting known concurrent writes. -#define WEBP_TSAN_IGNORE_FUNCTION -#if defined(__has_feature) -#if __has_feature(thread_sanitizer) -#undef WEBP_TSAN_IGNORE_FUNCTION -#define WEBP_TSAN_IGNORE_FUNCTION __attribute__((no_sanitize_thread)) -#endif -#endif - -#define WEBP_UBSAN_IGNORE_UNDEF -#define WEBP_UBSAN_IGNORE_UNSIGNED_OVERFLOW -#if defined(__clang__) && defined(__has_attribute) -#if __has_attribute(no_sanitize) -// This macro prevents the undefined behavior sanitizer from reporting -// failures. This is only meant to silence unaligned loads on platforms that -// are known to support them. -#undef WEBP_UBSAN_IGNORE_UNDEF -#define WEBP_UBSAN_IGNORE_UNDEF \ - __attribute__((no_sanitize("undefined"))) - -// This macro prevents the undefined behavior sanitizer from reporting -// failures related to unsigned integer overflows. This is only meant to -// silence cases where this well defined behavior is expected. -#undef WEBP_UBSAN_IGNORE_UNSIGNED_OVERFLOW -#define WEBP_UBSAN_IGNORE_UNSIGNED_OVERFLOW \ - __attribute__((no_sanitize("unsigned-integer-overflow"))) -#endif -#endif - -typedef enum { - kSSE2, - kSSE3, - kSlowSSSE3, // special feature for slow SSSE3 architectures - kSSE4_1, - kAVX, - kAVX2, - kNEON, - kMIPS32, - kMIPSdspR2, - kMSA -} CPUFeature; -// returns true if the CPU supports the feature. -typedef int (*VP8CPUInfo)(CPUFeature feature); -WEBP_EXTERN(VP8CPUInfo) VP8GetCPUInfo; - -//------------------------------------------------------------------------------ -// Init stub generator - -// Defines an init function stub to ensure each module exposes a symbol, -// avoiding a compiler warning. -#define WEBP_DSP_INIT_STUB(func) \ - extern void func(void); \ - WEBP_TSAN_IGNORE_FUNCTION void func(void) {} - -//------------------------------------------------------------------------------ -// 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 VP8Fdct VP8FTransform2; // performs two transforms at a time -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); -// The weights for VP8TDisto4x4 and VP8TDisto16x16 contain a row-major -// 4 by 4 symmetric matrix. -extern VP8WMetric VP8TDisto4x4, VP8TDisto16x16; - -// Compute the average (DC) of four 4x4 blocks. -// Each sub-4x4 block #i sum is stored in dc[i]. -typedef void (*VP8MeanMetric)(const uint8_t* ref, uint32_t dc[4]); -extern VP8MeanMetric VP8Mean16x4; - -typedef void (*VP8BlockCopy)(const uint8_t* src, uint8_t* dst); -extern VP8BlockCopy VP8Copy4x4; -extern VP8BlockCopy VP8Copy16x8; -// Quantization -struct VP8Matrix; // forward declaration -typedef int (*VP8QuantizeBlock)(int16_t in[16], int16_t out[16], - const struct VP8Matrix* const mtx); -// Same as VP8QuantizeBlock, but quantizes two consecutive blocks. -typedef int (*VP8Quantize2Blocks)(int16_t in[32], int16_t out[32], - const struct VP8Matrix* const mtx); - -extern VP8QuantizeBlock VP8EncQuantizeBlock; -extern VP8Quantize2Blocks VP8EncQuantize2Blocks; - -// specific to 2nd transform: -typedef int (*VP8QuantizeBlockWHT)(int16_t in[16], int16_t out[16], - const struct VP8Matrix* const mtx); -extern VP8QuantizeBlockWHT VP8EncQuantizeBlockWHT; - -extern const int VP8DspScan[16 + 4 + 4]; - -// Collect histogram for susceptibility calculation. -#define MAX_COEFF_THRESH 31 // size of histogram used by CollectHistogram. -typedef struct { - // We only need to store max_value and last_non_zero, not the distribution. - int max_value; - int last_non_zero; -} VP8Histogram; -typedef void (*VP8CHisto)(const uint8_t* ref, const uint8_t* pred, - int start_block, int end_block, - VP8Histogram* const histo); -extern VP8CHisto VP8CollectHistogram; -// General-purpose util function to help VP8CollectHistogram(). -void VP8SetHistogramData(const int distribution[MAX_COEFF_THRESH + 1], - VP8Histogram* const histo); - -// must be called before using any of the above -void VP8EncDspInit(void); - -//------------------------------------------------------------------------------ -// cost functions (encoding) - -extern const uint16_t VP8EntropyCost[256]; // 8bit fixed-point log(p) -// approximate cost per level: -extern const uint16_t VP8LevelFixedCosts[2047 /*MAX_LEVEL*/ + 1]; -extern const uint8_t VP8EncBands[16 + 1]; - -struct VP8Residual; -typedef void (*VP8SetResidualCoeffsFunc)(const int16_t* const coeffs, - struct VP8Residual* const res); -extern VP8SetResidualCoeffsFunc VP8SetResidualCoeffs; - -// Cost calculation function. -typedef int (*VP8GetResidualCostFunc)(int ctx0, - const struct VP8Residual* const res); -extern VP8GetResidualCostFunc VP8GetResidualCost; - -// must be called before anything using the above -void VP8EncDspCostInit(void); - -//------------------------------------------------------------------------------ -// SSIM / PSNR utils - -// struct for accumulating statistical moments -typedef struct { - uint32_t w; // sum(w_i) : sum of weights - uint32_t xm, ym; // sum(w_i * x_i), sum(w_i * y_i) - uint32_t xxm, xym, yym; // sum(w_i * x_i * x_i), etc. -} VP8DistoStats; - -// Compute the final SSIM value -// The non-clipped version assumes stats->w = (2 * VP8_SSIM_KERNEL + 1)^2. -double VP8SSIMFromStats(const VP8DistoStats* const stats); -double VP8SSIMFromStatsClipped(const VP8DistoStats* const stats); - -#define VP8_SSIM_KERNEL 3 // total size of the kernel: 2 * VP8_SSIM_KERNEL + 1 -typedef double (*VP8SSIMGetClippedFunc)(const uint8_t* src1, int stride1, - const uint8_t* src2, int stride2, - int xo, int yo, // center position - int W, int H); // plane dimension - -// This version is called with the guarantee that you can load 8 bytes and -// 8 rows at offset src1 and src2 -typedef double (*VP8SSIMGetFunc)(const uint8_t* src1, int stride1, - const uint8_t* src2, int stride2); - -extern VP8SSIMGetFunc VP8SSIMGet; // unclipped / unchecked -extern VP8SSIMGetClippedFunc VP8SSIMGetClipped; // with clipping - -typedef uint32_t (*VP8AccumulateSSEFunc)(const uint8_t* src1, - const uint8_t* src2, int len); -extern VP8AccumulateSSEFunc VP8AccumulateSSE; - -// must be called before using any of the above directly -void VP8SSIMDspInit(void); - -//------------------------------------------------------------------------------ -// 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 VP8PredFunc VP8PredLuma16[/* NUM_B_DC_MODES */]; -extern VP8PredFunc VP8PredChroma8[/* NUM_B_DC_MODES */]; -extern 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] -// must be called first -void VP8InitClipTables(void); - -// 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; - -// Dithering. Combines dithering values (centered around 128) with dst[], -// according to: dst[] = clip(dst[] + (((dither[]-128) + 8) >> 4) -#define VP8_DITHER_DESCALE 4 -#define VP8_DITHER_DESCALE_ROUNDER (1 << (VP8_DITHER_DESCALE - 1)) -#define VP8_DITHER_AMP_BITS 7 -#define VP8_DITHER_AMP_CENTER (1 << VP8_DITHER_AMP_BITS) -extern void (*VP8DitherCombine8x8)(const uint8_t* dither, uint8_t* dst, - int dst_stride); - -// 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 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); -// Must be called before using WebPYUV444Converters[] -void WebPInitYUV444Converters(void); - -//------------------------------------------------------------------------------ -// ARGB -> YUV converters - -// Convert ARGB samples to luma Y. -extern void (*WebPConvertARGBToY)(const uint32_t* argb, uint8_t* y, int width); -// Convert ARGB samples to U/V with downsampling. do_store should be '1' for -// even lines and '0' for odd ones. 'src_width' is the original width, not -// the U/V one. -extern void (*WebPConvertARGBToUV)(const uint32_t* argb, uint8_t* u, uint8_t* v, - int src_width, int do_store); - -// Convert a row of accumulated (four-values) of rgba32 toward U/V -extern void (*WebPConvertRGBA32ToUV)(const uint16_t* rgb, - uint8_t* u, uint8_t* v, int width); - -// Convert RGB or BGR to Y -extern void (*WebPConvertRGB24ToY)(const uint8_t* rgb, uint8_t* y, int width); -extern void (*WebPConvertBGR24ToY)(const uint8_t* bgr, uint8_t* y, int width); - -// used for plain-C fallback. -extern void WebPConvertARGBToUV_C(const uint32_t* argb, uint8_t* u, uint8_t* v, - int src_width, int do_store); -extern void WebPConvertRGBA32ToUV_C(const uint16_t* rgb, - uint8_t* u, uint8_t* v, int width); - -// utilities for accurate RGB->YUV conversion -extern uint64_t (*WebPSharpYUVUpdateY)(const uint16_t* src, const uint16_t* ref, - uint16_t* dst, int len); -extern void (*WebPSharpYUVUpdateRGB)(const int16_t* src, const int16_t* ref, - int16_t* dst, int len); -extern void (*WebPSharpYUVFilterRow)(const int16_t* A, const int16_t* B, - int len, - const uint16_t* best_y, uint16_t* out); - -// Must be called before using the above. -void WebPInitConvertARGBToYUV(void); - -//------------------------------------------------------------------------------ -// Rescaler - -struct WebPRescaler; - -// Import a row of data and save its contribution in the rescaler. -// 'channel' denotes the channel number to be imported. 'Expand' corresponds to -// the wrk->x_expand case. Otherwise, 'Shrink' is to be used. -typedef void (*WebPRescalerImportRowFunc)(struct WebPRescaler* const wrk, - const uint8_t* src); - -extern WebPRescalerImportRowFunc WebPRescalerImportRowExpand; -extern WebPRescalerImportRowFunc WebPRescalerImportRowShrink; - -// Export one row (starting at x_out position) from rescaler. -// 'Expand' corresponds to the wrk->y_expand case. -// Otherwise 'Shrink' is to be used -typedef void (*WebPRescalerExportRowFunc)(struct WebPRescaler* const wrk); -extern WebPRescalerExportRowFunc WebPRescalerExportRowExpand; -extern WebPRescalerExportRowFunc WebPRescalerExportRowShrink; - -// Plain-C implementation, as fall-back. -extern void WebPRescalerImportRowExpandC(struct WebPRescaler* const wrk, - const uint8_t* src); -extern void WebPRescalerImportRowShrinkC(struct WebPRescaler* const wrk, - const uint8_t* src); -extern void WebPRescalerExportRowExpandC(struct WebPRescaler* const wrk); -extern void WebPRescalerExportRowShrinkC(struct WebPRescaler* const wrk); - -// Main entry calls: -extern void WebPRescalerImportRow(struct WebPRescaler* const wrk, - const uint8_t* src); -// Export one row (starting at x_out position) from rescaler. -extern void WebPRescalerExportRow(struct WebPRescaler* const wrk); - -// Must be called first before using the above. -void WebPRescalerDspInit(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); - -// Dispatch the values from alpha[] plane to the ARGB destination 'dst'. -// Returns true if alpha[] plane has non-trivial values different from 0xff. -extern int (*WebPDispatchAlpha)(const uint8_t* alpha, int alpha_stride, - int width, int height, - uint8_t* dst, int dst_stride); - -// Transfer packed 8b alpha[] values to green channel in dst[], zero'ing the -// A/R/B values. 'dst_stride' is the stride for dst[] in uint32_t units. -extern void (*WebPDispatchAlphaToGreen)(const uint8_t* alpha, int alpha_stride, - int width, int height, - uint32_t* dst, int dst_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); - -// Extract the green values from 32b values in argb[] and pack them into alpha[] -// (this is the opposite of WebPDispatchAlphaToGreen). -extern void (*WebPExtractGreen)(const uint32_t* argb, uint8_t* alpha, int size); - -// 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); - -// Plain-C versions, used as fallback by some implementations. -void WebPMultRowC(uint8_t* const ptr, const uint8_t* const alpha, - int width, int inverse); -void WebPMultARGBRowC(uint32_t* const ptr, int width, int inverse); - -// To be called first before using the above. -void WebPInitAlphaProcessing(void); - -// ARGB packing function: a/r/g/b input is rgba or bgra order. -extern void (*VP8PackARGB)(const uint8_t* a, const uint8_t* r, - const uint8_t* g, const uint8_t* b, int len, - uint32_t* out); - -// RGB packing function. 'step' can be 3 or 4. r/g/b input is rgb or bgr order. -extern void (*VP8PackRGB)(const uint8_t* r, const uint8_t* g, const uint8_t* b, - int len, int step, uint32_t* out); - -// To be called first before using the above. -void VP8EncDspARGBInit(void); - -//------------------------------------------------------------------------------ -// Filter functions - -typedef enum { // Filter types. - WEBP_FILTER_NONE = 0, - WEBP_FILTER_HORIZONTAL, - WEBP_FILTER_VERTICAL, - WEBP_FILTER_GRADIENT, - WEBP_FILTER_LAST = WEBP_FILTER_GRADIENT + 1, // end marker - WEBP_FILTER_BEST, // meta-types - WEBP_FILTER_FAST -} WEBP_FILTER_TYPE; - -typedef void (*WebPFilterFunc)(const uint8_t* in, int width, int height, - int stride, uint8_t* out); -// In-place un-filtering. -// Warning! 'prev_line' pointer can be equal to 'cur_line' or 'preds'. -typedef void (*WebPUnfilterFunc)(const uint8_t* prev_line, const uint8_t* preds, - uint8_t* cur_line, int width); - -// Filter the given data using the given predictor. -// 'in' corresponds to a 2-dimensional pixel array of size (stride * height) -// in raster order. -// 'stride' is number of bytes per scan line (with possible padding). -// 'out' should be pre-allocated. -extern WebPFilterFunc WebPFilters[WEBP_FILTER_LAST]; - -// In-place reconstruct the original data from the given filtered data. -// The reconstruction will be done for 'num_rows' rows starting from 'row' -// (assuming rows upto 'row - 1' are already reconstructed). -extern WebPUnfilterFunc WebPUnfilters[WEBP_FILTER_LAST]; - -// To be called first before using the above. -void VP8FiltersInit(void); - -#ifdef __cplusplus -} // extern "C" -#endif - -#endif /* WEBP_DSP_DSP_H_ */ |