1a2415724fb3466168b2af5b08bd94ba732c0e753Vikas Arora// Copyright 2010 Google Inc. All Rights Reserved. 29aea642eefa7a641ab8b89d953251939221d2719Eric Hassold// 30406ce1417f76f2034833414dcecc9f56253640cVikas Arora// Use of this source code is governed by a BSD-style license 40406ce1417f76f2034833414dcecc9f56253640cVikas Arora// that can be found in the COPYING file in the root of the source 50406ce1417f76f2034833414dcecc9f56253640cVikas Arora// tree. An additional intellectual property rights grant can be found 60406ce1417f76f2034833414dcecc9f56253640cVikas Arora// in the file PATENTS. All contributing project authors may 70406ce1417f76f2034833414dcecc9f56253640cVikas Arora// be found in the AUTHORS file in the root of the source tree. 89aea642eefa7a641ab8b89d953251939221d2719Eric Hassold// ----------------------------------------------------------------------------- 99aea642eefa7a641ab8b89d953251939221d2719Eric Hassold// 109aea642eefa7a641ab8b89d953251939221d2719Eric Hassold// VP8 decoder: internal header. 119aea642eefa7a641ab8b89d953251939221d2719Eric Hassold// 129aea642eefa7a641ab8b89d953251939221d2719Eric Hassold// Author: Skal (pascal.massimino@gmail.com) 139aea642eefa7a641ab8b89d953251939221d2719Eric Hassold 1403d5e34c70f174c16282b0efdc6bb9473df5f8f1Vikas Arora#ifndef WEBP_DEC_VP8I_H_ 1503d5e34c70f174c16282b0efdc6bb9473df5f8f1Vikas Arora#define WEBP_DEC_VP8I_H_ 169aea642eefa7a641ab8b89d953251939221d2719Eric Hassold 179aea642eefa7a641ab8b89d953251939221d2719Eric Hassold#include <string.h> // for memcpy() 18a2415724fb3466168b2af5b08bd94ba732c0e753Vikas Arora#include "./vp8li.h" 19a2415724fb3466168b2af5b08bd94ba732c0e753Vikas Arora#include "../utils/bit_reader.h" 208b720228d581a84fd173b6dcb2fa295b59db489aVikas Arora#include "../utils/random.h" 21a2415724fb3466168b2af5b08bd94ba732c0e753Vikas Arora#include "../utils/thread.h" 22a2415724fb3466168b2af5b08bd94ba732c0e753Vikas Arora#include "../dsp/dsp.h" 239aea642eefa7a641ab8b89d953251939221d2719Eric Hassold 248b720228d581a84fd173b6dcb2fa295b59db489aVikas Arora#ifdef __cplusplus 259aea642eefa7a641ab8b89d953251939221d2719Eric Hassoldextern "C" { 269aea642eefa7a641ab8b89d953251939221d2719Eric Hassold#endif 279aea642eefa7a641ab8b89d953251939221d2719Eric Hassold 28a2415724fb3466168b2af5b08bd94ba732c0e753Vikas Arora//------------------------------------------------------------------------------ 299aea642eefa7a641ab8b89d953251939221d2719Eric Hassold// Various defines and enums 309aea642eefa7a641ab8b89d953251939221d2719Eric Hassold 3103d5e34c70f174c16282b0efdc6bb9473df5f8f1Vikas Arora// version numbers 3203d5e34c70f174c16282b0efdc6bb9473df5f8f1Vikas Arora#define DEC_MAJ_VERSION 0 338b720228d581a84fd173b6dcb2fa295b59db489aVikas Arora#define DEC_MIN_VERSION 4 34af51b94a435132e9014c324e25fb686b3d07a8c8Vikas Arora#define DEC_REV_VERSION 1 359aea642eefa7a641ab8b89d953251939221d2719Eric Hassold 369aea642eefa7a641ab8b89d953251939221d2719Eric Hassold// intra prediction modes 379aea642eefa7a641ab8b89d953251939221d2719Eric Hassoldenum { B_DC_PRED = 0, // 4x4 modes 389aea642eefa7a641ab8b89d953251939221d2719Eric Hassold B_TM_PRED, 399aea642eefa7a641ab8b89d953251939221d2719Eric Hassold B_VE_PRED, 409aea642eefa7a641ab8b89d953251939221d2719Eric Hassold B_HE_PRED, 419aea642eefa7a641ab8b89d953251939221d2719Eric Hassold B_RD_PRED, 429aea642eefa7a641ab8b89d953251939221d2719Eric Hassold B_VR_PRED, 439aea642eefa7a641ab8b89d953251939221d2719Eric Hassold B_LD_PRED, 449aea642eefa7a641ab8b89d953251939221d2719Eric Hassold B_VL_PRED, 459aea642eefa7a641ab8b89d953251939221d2719Eric Hassold B_HD_PRED, 469aea642eefa7a641ab8b89d953251939221d2719Eric Hassold B_HU_PRED, 479aea642eefa7a641ab8b89d953251939221d2719Eric Hassold NUM_BMODES = B_HU_PRED + 1 - B_DC_PRED, // = 10 489aea642eefa7a641ab8b89d953251939221d2719Eric Hassold 499aea642eefa7a641ab8b89d953251939221d2719Eric Hassold // Luma16 or UV modes 509aea642eefa7a641ab8b89d953251939221d2719Eric Hassold DC_PRED = B_DC_PRED, V_PRED = B_VE_PRED, 519aea642eefa7a641ab8b89d953251939221d2719Eric Hassold H_PRED = B_HE_PRED, TM_PRED = B_TM_PRED, 529aea642eefa7a641ab8b89d953251939221d2719Eric Hassold B_PRED = NUM_BMODES, // refined I4x4 mode 539aea642eefa7a641ab8b89d953251939221d2719Eric Hassold 549aea642eefa7a641ab8b89d953251939221d2719Eric Hassold // special modes 559aea642eefa7a641ab8b89d953251939221d2719Eric Hassold B_DC_PRED_NOTOP = 4, 569aea642eefa7a641ab8b89d953251939221d2719Eric Hassold B_DC_PRED_NOLEFT = 5, 5703d5e34c70f174c16282b0efdc6bb9473df5f8f1Vikas Arora B_DC_PRED_NOTOPLEFT = 6, 5803d5e34c70f174c16282b0efdc6bb9473df5f8f1Vikas Arora NUM_B_DC_MODES = 7 }; 599aea642eefa7a641ab8b89d953251939221d2719Eric Hassold 609aea642eefa7a641ab8b89d953251939221d2719Eric Hassoldenum { MB_FEATURE_TREE_PROBS = 3, 619aea642eefa7a641ab8b89d953251939221d2719Eric Hassold NUM_MB_SEGMENTS = 4, 629aea642eefa7a641ab8b89d953251939221d2719Eric Hassold NUM_REF_LF_DELTAS = 4, 639aea642eefa7a641ab8b89d953251939221d2719Eric Hassold NUM_MODE_LF_DELTAS = 4, // I4x4, ZERO, *, SPLIT 649aea642eefa7a641ab8b89d953251939221d2719Eric Hassold MAX_NUM_PARTITIONS = 8, 659aea642eefa7a641ab8b89d953251939221d2719Eric Hassold // Probabilities 669aea642eefa7a641ab8b89d953251939221d2719Eric Hassold NUM_TYPES = 4, 679aea642eefa7a641ab8b89d953251939221d2719Eric Hassold NUM_BANDS = 8, 689aea642eefa7a641ab8b89d953251939221d2719Eric Hassold NUM_CTX = 3, 699aea642eefa7a641ab8b89d953251939221d2719Eric Hassold NUM_PROBAS = 11, 709aea642eefa7a641ab8b89d953251939221d2719Eric Hassold NUM_MV_PROBAS = 19 }; 719aea642eefa7a641ab8b89d953251939221d2719Eric Hassold 729aea642eefa7a641ab8b89d953251939221d2719Eric Hassold// YUV-cache parameters. 739aea642eefa7a641ab8b89d953251939221d2719Eric Hassold// Constraints are: We need to store one 16x16 block of luma samples (y), 749aea642eefa7a641ab8b89d953251939221d2719Eric Hassold// and two 8x8 chroma blocks (u/v). These are better be 16-bytes aligned, 759aea642eefa7a641ab8b89d953251939221d2719Eric Hassold// in order to be SIMD-friendly. We also need to store the top, left and 769aea642eefa7a641ab8b89d953251939221d2719Eric Hassold// top-left samples (from previously decoded blocks), along with four 779aea642eefa7a641ab8b89d953251939221d2719Eric Hassold// extra top-right samples for luma (intra4x4 prediction only). 789aea642eefa7a641ab8b89d953251939221d2719Eric Hassold// One possible layout is, using 32 * (17 + 9) bytes: 799aea642eefa7a641ab8b89d953251939221d2719Eric Hassold// 809aea642eefa7a641ab8b89d953251939221d2719Eric Hassold// .+------ <- only 1 pixel high 819aea642eefa7a641ab8b89d953251939221d2719Eric Hassold// .|yyyyt. 829aea642eefa7a641ab8b89d953251939221d2719Eric Hassold// .|yyyyt. 839aea642eefa7a641ab8b89d953251939221d2719Eric Hassold// .|yyyyt. 849aea642eefa7a641ab8b89d953251939221d2719Eric Hassold// .|yyyy.. 859aea642eefa7a641ab8b89d953251939221d2719Eric Hassold// .+--.+-- <- only 1 pixel high 869aea642eefa7a641ab8b89d953251939221d2719Eric Hassold// .|uu.|vv 879aea642eefa7a641ab8b89d953251939221d2719Eric Hassold// .|uu.|vv 889aea642eefa7a641ab8b89d953251939221d2719Eric Hassold// 899aea642eefa7a641ab8b89d953251939221d2719Eric Hassold// Every character is a 4x4 block, with legend: 909aea642eefa7a641ab8b89d953251939221d2719Eric Hassold// '.' = unused 919aea642eefa7a641ab8b89d953251939221d2719Eric Hassold// 'y' = y-samples 'u' = u-samples 'v' = u-samples 929aea642eefa7a641ab8b89d953251939221d2719Eric Hassold// '|' = left sample, '-' = top sample, '+' = top-left sample 939aea642eefa7a641ab8b89d953251939221d2719Eric Hassold// 't' = extra top-right sample for 4x4 modes 949aea642eefa7a641ab8b89d953251939221d2719Eric Hassold// With this layout, BPS (=Bytes Per Scan-line) is one cacheline size. 959aea642eefa7a641ab8b89d953251939221d2719Eric Hassold#define BPS 32 // this is the common stride used by yuv[] 969aea642eefa7a641ab8b89d953251939221d2719Eric Hassold#define YUV_SIZE (BPS * 17 + BPS * 9) 979aea642eefa7a641ab8b89d953251939221d2719Eric Hassold#define Y_SIZE (BPS * 17) 989aea642eefa7a641ab8b89d953251939221d2719Eric Hassold#define Y_OFF (BPS * 1 + 8) 999aea642eefa7a641ab8b89d953251939221d2719Eric Hassold#define U_OFF (Y_OFF + BPS * 16 + BPS) 1009aea642eefa7a641ab8b89d953251939221d2719Eric Hassold#define V_OFF (U_OFF + 16) 1019aea642eefa7a641ab8b89d953251939221d2719Eric Hassold 1028b720228d581a84fd173b6dcb2fa295b59db489aVikas Arora// minimal width under which lossy multi-threading is always disabled 1038b720228d581a84fd173b6dcb2fa295b59db489aVikas Arora#define MIN_WIDTH_FOR_THREADS 512 1048b720228d581a84fd173b6dcb2fa295b59db489aVikas Arora 105a2415724fb3466168b2af5b08bd94ba732c0e753Vikas Arora//------------------------------------------------------------------------------ 1069aea642eefa7a641ab8b89d953251939221d2719Eric Hassold// Headers 1079aea642eefa7a641ab8b89d953251939221d2719Eric Hassold 1089aea642eefa7a641ab8b89d953251939221d2719Eric Hassoldtypedef struct { 1099aea642eefa7a641ab8b89d953251939221d2719Eric Hassold uint8_t key_frame_; 1109aea642eefa7a641ab8b89d953251939221d2719Eric Hassold uint8_t profile_; 1119aea642eefa7a641ab8b89d953251939221d2719Eric Hassold uint8_t show_; 1129aea642eefa7a641ab8b89d953251939221d2719Eric Hassold uint32_t partition_length_; 1139aea642eefa7a641ab8b89d953251939221d2719Eric Hassold} VP8FrameHeader; 1149aea642eefa7a641ab8b89d953251939221d2719Eric Hassold 1159aea642eefa7a641ab8b89d953251939221d2719Eric Hassoldtypedef struct { 1169aea642eefa7a641ab8b89d953251939221d2719Eric Hassold uint16_t width_; 1179aea642eefa7a641ab8b89d953251939221d2719Eric Hassold uint16_t height_; 1189aea642eefa7a641ab8b89d953251939221d2719Eric Hassold uint8_t xscale_; 1199aea642eefa7a641ab8b89d953251939221d2719Eric Hassold uint8_t yscale_; 1209aea642eefa7a641ab8b89d953251939221d2719Eric Hassold uint8_t colorspace_; // 0 = YCbCr 1219aea642eefa7a641ab8b89d953251939221d2719Eric Hassold uint8_t clamp_type_; 1229aea642eefa7a641ab8b89d953251939221d2719Eric Hassold} VP8PictureHeader; 1239aea642eefa7a641ab8b89d953251939221d2719Eric Hassold 1249aea642eefa7a641ab8b89d953251939221d2719Eric Hassold// segment features 1259aea642eefa7a641ab8b89d953251939221d2719Eric Hassoldtypedef struct { 1269aea642eefa7a641ab8b89d953251939221d2719Eric Hassold int use_segment_; 1279aea642eefa7a641ab8b89d953251939221d2719Eric Hassold int update_map_; // whether to update the segment map or not 1289aea642eefa7a641ab8b89d953251939221d2719Eric Hassold int absolute_delta_; // absolute or delta values for quantizer and filter 1299aea642eefa7a641ab8b89d953251939221d2719Eric Hassold int8_t quantizer_[NUM_MB_SEGMENTS]; // quantization changes 1309aea642eefa7a641ab8b89d953251939221d2719Eric Hassold int8_t filter_strength_[NUM_MB_SEGMENTS]; // filter strength for segments 1319aea642eefa7a641ab8b89d953251939221d2719Eric Hassold} VP8SegmentHeader; 1329aea642eefa7a641ab8b89d953251939221d2719Eric Hassold 1338b720228d581a84fd173b6dcb2fa295b59db489aVikas Arora 1348b720228d581a84fd173b6dcb2fa295b59db489aVikas Arora// probas associated to one of the contexts 1358b720228d581a84fd173b6dcb2fa295b59db489aVikas Aroratypedef uint8_t VP8ProbaArray[NUM_PROBAS]; 1368b720228d581a84fd173b6dcb2fa295b59db489aVikas Arora 1378b720228d581a84fd173b6dcb2fa295b59db489aVikas Aroratypedef struct { // all the probas associated to one band 1388b720228d581a84fd173b6dcb2fa295b59db489aVikas Arora VP8ProbaArray probas_[NUM_CTX]; 1398b720228d581a84fd173b6dcb2fa295b59db489aVikas Arora} VP8BandProbas; 1408b720228d581a84fd173b6dcb2fa295b59db489aVikas Arora 1419aea642eefa7a641ab8b89d953251939221d2719Eric Hassold// Struct collecting all frame-persistent probabilities. 1429aea642eefa7a641ab8b89d953251939221d2719Eric Hassoldtypedef struct { 1439aea642eefa7a641ab8b89d953251939221d2719Eric Hassold uint8_t segments_[MB_FEATURE_TREE_PROBS]; 1449aea642eefa7a641ab8b89d953251939221d2719Eric Hassold // Type: 0:Intra16-AC 1:Intra16-DC 2:Chroma 3:Intra4 1458b720228d581a84fd173b6dcb2fa295b59db489aVikas Arora VP8BandProbas bands_[NUM_TYPES][NUM_BANDS]; 1469aea642eefa7a641ab8b89d953251939221d2719Eric Hassold} VP8Proba; 1479aea642eefa7a641ab8b89d953251939221d2719Eric Hassold 1489aea642eefa7a641ab8b89d953251939221d2719Eric Hassold// Filter parameters 1499aea642eefa7a641ab8b89d953251939221d2719Eric Hassoldtypedef struct { 1509aea642eefa7a641ab8b89d953251939221d2719Eric Hassold int simple_; // 0=complex, 1=simple 1519aea642eefa7a641ab8b89d953251939221d2719Eric Hassold int level_; // [0..63] 1529aea642eefa7a641ab8b89d953251939221d2719Eric Hassold int sharpness_; // [0..7] 1539aea642eefa7a641ab8b89d953251939221d2719Eric Hassold int use_lf_delta_; 1549aea642eefa7a641ab8b89d953251939221d2719Eric Hassold int ref_lf_delta_[NUM_REF_LF_DELTAS]; 1559aea642eefa7a641ab8b89d953251939221d2719Eric Hassold int mode_lf_delta_[NUM_MODE_LF_DELTAS]; 1569aea642eefa7a641ab8b89d953251939221d2719Eric Hassold} VP8FilterHeader; 1579aea642eefa7a641ab8b89d953251939221d2719Eric Hassold 158a2415724fb3466168b2af5b08bd94ba732c0e753Vikas Arora//------------------------------------------------------------------------------ 1599aea642eefa7a641ab8b89d953251939221d2719Eric Hassold// Informations about the macroblocks. 1609aea642eefa7a641ab8b89d953251939221d2719Eric Hassold 161a2415724fb3466168b2af5b08bd94ba732c0e753Vikas Aroratypedef struct { // filter specs 1628b720228d581a84fd173b6dcb2fa295b59db489aVikas Arora uint8_t f_limit_; // filter limit in [3..189], or 0 if no filtering 1638b720228d581a84fd173b6dcb2fa295b59db489aVikas Arora uint8_t f_ilevel_; // inner limit in [1..63] 1648b720228d581a84fd173b6dcb2fa295b59db489aVikas Arora uint8_t f_inner_; // do inner filtering? 1658b720228d581a84fd173b6dcb2fa295b59db489aVikas Arora uint8_t hev_thresh_; // high edge variance threshold in [0..2] 166a2415724fb3466168b2af5b08bd94ba732c0e753Vikas Arora} VP8FInfo; 167a2415724fb3466168b2af5b08bd94ba732c0e753Vikas Arora 1688b720228d581a84fd173b6dcb2fa295b59db489aVikas Aroratypedef struct { // Top/Left Contexts used for syntax-parsing 1698b720228d581a84fd173b6dcb2fa295b59db489aVikas Arora uint8_t nz_; // non-zero AC/DC coeffs (4bit for luma + 4bit for chroma) 1708b720228d581a84fd173b6dcb2fa295b59db489aVikas Arora uint8_t nz_dc_; // non-zero DC coeff (1bit) 1719aea642eefa7a641ab8b89d953251939221d2719Eric Hassold} VP8MB; 1729aea642eefa7a641ab8b89d953251939221d2719Eric Hassold 1739aea642eefa7a641ab8b89d953251939221d2719Eric Hassold// Dequantization matrices 174a2415724fb3466168b2af5b08bd94ba732c0e753Vikas Aroratypedef int quant_t[2]; // [DC / AC]. Can be 'uint16_t[2]' too (~slower). 1759aea642eefa7a641ab8b89d953251939221d2719Eric Hassoldtypedef struct { 176a2415724fb3466168b2af5b08bd94ba732c0e753Vikas Arora quant_t y1_mat_, y2_mat_, uv_mat_; 1778b720228d581a84fd173b6dcb2fa295b59db489aVikas Arora 1788b720228d581a84fd173b6dcb2fa295b59db489aVikas Arora int uv_quant_; // U/V quantizer value 1798b720228d581a84fd173b6dcb2fa295b59db489aVikas Arora int dither_; // dithering amplitude (0 = off, max=255) 1809aea642eefa7a641ab8b89d953251939221d2719Eric Hassold} VP8QuantMatrix; 1819aea642eefa7a641ab8b89d953251939221d2719Eric Hassold 1828b720228d581a84fd173b6dcb2fa295b59db489aVikas Arora// Data needed to reconstruct a macroblock 1838b720228d581a84fd173b6dcb2fa295b59db489aVikas Aroratypedef struct { 1848b720228d581a84fd173b6dcb2fa295b59db489aVikas Arora int16_t coeffs_[384]; // 384 coeffs = (16+4+4) * 4*4 1858b720228d581a84fd173b6dcb2fa295b59db489aVikas Arora uint8_t is_i4x4_; // true if intra4x4 1868b720228d581a84fd173b6dcb2fa295b59db489aVikas Arora uint8_t imodes_[16]; // one 16x16 mode (#0) or sixteen 4x4 modes 1878b720228d581a84fd173b6dcb2fa295b59db489aVikas Arora uint8_t uvmode_; // chroma prediction mode 1888b720228d581a84fd173b6dcb2fa295b59db489aVikas Arora // bit-wise info about the content of each sub-4x4 blocks (in decoding order). 1898b720228d581a84fd173b6dcb2fa295b59db489aVikas Arora // Each of the 4x4 blocks for y/u/v is associated with a 2b code according to: 1908b720228d581a84fd173b6dcb2fa295b59db489aVikas Arora // code=0 -> no coefficient 1918b720228d581a84fd173b6dcb2fa295b59db489aVikas Arora // code=1 -> only DC 1928b720228d581a84fd173b6dcb2fa295b59db489aVikas Arora // code=2 -> first three coefficients are non-zero 1938b720228d581a84fd173b6dcb2fa295b59db489aVikas Arora // code=3 -> more than three coefficients are non-zero 1948b720228d581a84fd173b6dcb2fa295b59db489aVikas Arora // This allows to call specialized transform functions. 1958b720228d581a84fd173b6dcb2fa295b59db489aVikas Arora uint32_t non_zero_y_; 1968b720228d581a84fd173b6dcb2fa295b59db489aVikas Arora uint32_t non_zero_uv_; 1978b720228d581a84fd173b6dcb2fa295b59db489aVikas Arora uint8_t dither_; // local dithering strength (deduced from non_zero_*) 198af51b94a435132e9014c324e25fb686b3d07a8c8Vikas Arora uint8_t skip_; 199af51b94a435132e9014c324e25fb686b3d07a8c8Vikas Arora uint8_t segment_; 2008b720228d581a84fd173b6dcb2fa295b59db489aVikas Arora} VP8MBData; 2018b720228d581a84fd173b6dcb2fa295b59db489aVikas Arora 202a2415724fb3466168b2af5b08bd94ba732c0e753Vikas Arora// Persistent information needed by the parallel processing 203a2415724fb3466168b2af5b08bd94ba732c0e753Vikas Aroratypedef struct { 2048b720228d581a84fd173b6dcb2fa295b59db489aVikas Arora int id_; // cache row to process (in [0..2]) 2058b720228d581a84fd173b6dcb2fa295b59db489aVikas Arora int mb_y_; // macroblock position of the row 2068b720228d581a84fd173b6dcb2fa295b59db489aVikas Arora int filter_row_; // true if row-filtering is needed 2078b720228d581a84fd173b6dcb2fa295b59db489aVikas Arora VP8FInfo* f_info_; // filter strengths (swapped with dec->f_info_) 2088b720228d581a84fd173b6dcb2fa295b59db489aVikas Arora VP8MBData* mb_data_; // reconstruction data (swapped with dec->mb_data_) 2098b720228d581a84fd173b6dcb2fa295b59db489aVikas Arora VP8Io io_; // copy of the VP8Io to pass to put() 210a2415724fb3466168b2af5b08bd94ba732c0e753Vikas Arora} VP8ThreadContext; 211a2415724fb3466168b2af5b08bd94ba732c0e753Vikas Arora 2128b720228d581a84fd173b6dcb2fa295b59db489aVikas Arora// Saved top samples, per macroblock. Fits into a cache-line. 2138b720228d581a84fd173b6dcb2fa295b59db489aVikas Aroratypedef struct { 2148b720228d581a84fd173b6dcb2fa295b59db489aVikas Arora uint8_t y[16], u[8], v[8]; 2158b720228d581a84fd173b6dcb2fa295b59db489aVikas Arora} VP8TopSamples; 2168b720228d581a84fd173b6dcb2fa295b59db489aVikas Arora 217a2415724fb3466168b2af5b08bd94ba732c0e753Vikas Arora//------------------------------------------------------------------------------ 2189aea642eefa7a641ab8b89d953251939221d2719Eric Hassold// VP8Decoder: the main opaque structure handed over to user 2199aea642eefa7a641ab8b89d953251939221d2719Eric Hassold 2209aea642eefa7a641ab8b89d953251939221d2719Eric Hassoldstruct VP8Decoder { 22103d5e34c70f174c16282b0efdc6bb9473df5f8f1Vikas Arora VP8StatusCode status_; 2229aea642eefa7a641ab8b89d953251939221d2719Eric Hassold int ready_; // true if ready to decode a picture with VP8Decode() 2239aea642eefa7a641ab8b89d953251939221d2719Eric Hassold const char* error_msg_; // set when status_ is not OK. 2249aea642eefa7a641ab8b89d953251939221d2719Eric Hassold 2259aea642eefa7a641ab8b89d953251939221d2719Eric Hassold // Main data source 2269aea642eefa7a641ab8b89d953251939221d2719Eric Hassold VP8BitReader br_; 2279aea642eefa7a641ab8b89d953251939221d2719Eric Hassold 2289aea642eefa7a641ab8b89d953251939221d2719Eric Hassold // headers 2299aea642eefa7a641ab8b89d953251939221d2719Eric Hassold VP8FrameHeader frm_hdr_; 2309aea642eefa7a641ab8b89d953251939221d2719Eric Hassold VP8PictureHeader pic_hdr_; 2319aea642eefa7a641ab8b89d953251939221d2719Eric Hassold VP8FilterHeader filter_hdr_; 2329aea642eefa7a641ab8b89d953251939221d2719Eric Hassold VP8SegmentHeader segment_hdr_; 2339aea642eefa7a641ab8b89d953251939221d2719Eric Hassold 234a2415724fb3466168b2af5b08bd94ba732c0e753Vikas Arora // Worker 235a2415724fb3466168b2af5b08bd94ba732c0e753Vikas Arora WebPWorker worker_; 2368b720228d581a84fd173b6dcb2fa295b59db489aVikas Arora int mt_method_; // multi-thread method: 0=off, 1=[parse+recon][filter] 2378b720228d581a84fd173b6dcb2fa295b59db489aVikas Arora // 2=[parse][recon+filter] 238a2415724fb3466168b2af5b08bd94ba732c0e753Vikas Arora int cache_id_; // current cache row 239a2415724fb3466168b2af5b08bd94ba732c0e753Vikas Arora int num_caches_; // number of cached rows of 16 pixels (1, 2 or 3) 240a2415724fb3466168b2af5b08bd94ba732c0e753Vikas Arora VP8ThreadContext thread_ctx_; // Thread context 241a2415724fb3466168b2af5b08bd94ba732c0e753Vikas Arora 2429aea642eefa7a641ab8b89d953251939221d2719Eric Hassold // dimension, in macroblock units. 2439aea642eefa7a641ab8b89d953251939221d2719Eric Hassold int mb_w_, mb_h_; 2449aea642eefa7a641ab8b89d953251939221d2719Eric Hassold 245466727975bcc57c0c5597bcd0747a2fe4777b303Vikas Arora // Macroblock to process/filter, depending on cropping and filter_type. 246466727975bcc57c0c5597bcd0747a2fe4777b303Vikas Arora int tl_mb_x_, tl_mb_y_; // top-left MB that must be in-loop filtered 247466727975bcc57c0c5597bcd0747a2fe4777b303Vikas Arora int br_mb_x_, br_mb_y_; // last bottom-right MB that must be decoded 248466727975bcc57c0c5597bcd0747a2fe4777b303Vikas Arora 2499aea642eefa7a641ab8b89d953251939221d2719Eric Hassold // number of partitions. 2509aea642eefa7a641ab8b89d953251939221d2719Eric Hassold int num_parts_; 2519aea642eefa7a641ab8b89d953251939221d2719Eric Hassold // per-partition boolean decoders. 2529aea642eefa7a641ab8b89d953251939221d2719Eric Hassold VP8BitReader parts_[MAX_NUM_PARTITIONS]; 2539aea642eefa7a641ab8b89d953251939221d2719Eric Hassold 2548b720228d581a84fd173b6dcb2fa295b59db489aVikas Arora // Dithering strength, deduced from decoding options 2558b720228d581a84fd173b6dcb2fa295b59db489aVikas Arora int dither_; // whether to use dithering or not 2568b720228d581a84fd173b6dcb2fa295b59db489aVikas Arora VP8Random dithering_rg_; // random generator for dithering 2579aea642eefa7a641ab8b89d953251939221d2719Eric Hassold 2589aea642eefa7a641ab8b89d953251939221d2719Eric Hassold // dequantization (one set of DC/AC dequant factor per segment) 2599aea642eefa7a641ab8b89d953251939221d2719Eric Hassold VP8QuantMatrix dqm_[NUM_MB_SEGMENTS]; 2609aea642eefa7a641ab8b89d953251939221d2719Eric Hassold 2619aea642eefa7a641ab8b89d953251939221d2719Eric Hassold // probabilities 2629aea642eefa7a641ab8b89d953251939221d2719Eric Hassold VP8Proba proba_; 2639aea642eefa7a641ab8b89d953251939221d2719Eric Hassold int use_skip_proba_; 2649aea642eefa7a641ab8b89d953251939221d2719Eric Hassold uint8_t skip_p_; 2659aea642eefa7a641ab8b89d953251939221d2719Eric Hassold 2669aea642eefa7a641ab8b89d953251939221d2719Eric Hassold // Boundary data cache and persistent buffers. 2678b720228d581a84fd173b6dcb2fa295b59db489aVikas Arora uint8_t* intra_t_; // top intra modes values: 4 * mb_w_ 2688b720228d581a84fd173b6dcb2fa295b59db489aVikas Arora uint8_t intra_l_[4]; // left intra modes values 2698b720228d581a84fd173b6dcb2fa295b59db489aVikas Arora 2708b720228d581a84fd173b6dcb2fa295b59db489aVikas Arora VP8TopSamples* yuv_t_; // top y/u/v samples 2719aea642eefa7a641ab8b89d953251939221d2719Eric Hassold 2728b720228d581a84fd173b6dcb2fa295b59db489aVikas Arora VP8MB* mb_info_; // contextual macroblock info (mb_w_ + 1) 2738b720228d581a84fd173b6dcb2fa295b59db489aVikas Arora VP8FInfo* f_info_; // filter strength info 2748b720228d581a84fd173b6dcb2fa295b59db489aVikas Arora uint8_t* yuv_b_; // main block for Y/U/V (size = YUV_SIZE) 2759aea642eefa7a641ab8b89d953251939221d2719Eric Hassold 2768b720228d581a84fd173b6dcb2fa295b59db489aVikas Arora uint8_t* cache_y_; // macroblock row for storing unfiltered samples 2779aea642eefa7a641ab8b89d953251939221d2719Eric Hassold uint8_t* cache_u_; 2789aea642eefa7a641ab8b89d953251939221d2719Eric Hassold uint8_t* cache_v_; 2799aea642eefa7a641ab8b89d953251939221d2719Eric Hassold int cache_y_stride_; 2809aea642eefa7a641ab8b89d953251939221d2719Eric Hassold int cache_uv_stride_; 2819aea642eefa7a641ab8b89d953251939221d2719Eric Hassold 2829aea642eefa7a641ab8b89d953251939221d2719Eric Hassold // main memory chunk for the above data. Persistent. 2839aea642eefa7a641ab8b89d953251939221d2719Eric Hassold void* mem_; 284a2415724fb3466168b2af5b08bd94ba732c0e753Vikas Arora size_t mem_size_; 2859aea642eefa7a641ab8b89d953251939221d2719Eric Hassold 2869aea642eefa7a641ab8b89d953251939221d2719Eric Hassold // Per macroblock non-persistent infos. 2879aea642eefa7a641ab8b89d953251939221d2719Eric Hassold int mb_x_, mb_y_; // current position, in macroblock units 2888b720228d581a84fd173b6dcb2fa295b59db489aVikas Arora VP8MBData* mb_data_; // parsed reconstruction data 2899aea642eefa7a641ab8b89d953251939221d2719Eric Hassold 2909aea642eefa7a641ab8b89d953251939221d2719Eric Hassold // Filtering side-info 2911e7bf8805bd030c19924a5306837ecd72c295751Vikas Arora int filter_type_; // 0=off, 1=simple, 2=complex 2921e7bf8805bd030c19924a5306837ecd72c295751Vikas Arora VP8FInfo fstrengths_[NUM_MB_SEGMENTS][2]; // precalculated per-segment/type 293466727975bcc57c0c5597bcd0747a2fe4777b303Vikas Arora 2948b720228d581a84fd173b6dcb2fa295b59db489aVikas Arora // Alpha 2958b720228d581a84fd173b6dcb2fa295b59db489aVikas Arora struct ALPHDecoder* alph_dec_; // alpha-plane decoder object 2968b720228d581a84fd173b6dcb2fa295b59db489aVikas Arora const uint8_t* alpha_data_; // compressed alpha data (if present) 297466727975bcc57c0c5597bcd0747a2fe4777b303Vikas Arora size_t alpha_data_size_; 2980406ce1417f76f2034833414dcecc9f56253640cVikas Arora int is_alpha_decoded_; // true if alpha_data_ is decoded in alpha_plane_ 299af51b94a435132e9014c324e25fb686b3d07a8c8Vikas Arora uint8_t* alpha_plane_; // output. Persistent, contains the whole data. 300af51b94a435132e9014c324e25fb686b3d07a8c8Vikas Arora int alpha_dithering_; // derived from decoding options (0=off, 100=full). 3019aea642eefa7a641ab8b89d953251939221d2719Eric Hassold}; 3029aea642eefa7a641ab8b89d953251939221d2719Eric Hassold 303a2415724fb3466168b2af5b08bd94ba732c0e753Vikas Arora//------------------------------------------------------------------------------ 3049aea642eefa7a641ab8b89d953251939221d2719Eric Hassold// internal functions. Not public. 3059aea642eefa7a641ab8b89d953251939221d2719Eric Hassold 3069aea642eefa7a641ab8b89d953251939221d2719Eric Hassold// in vp8.c 30703d5e34c70f174c16282b0efdc6bb9473df5f8f1Vikas Aroraint VP8SetError(VP8Decoder* const dec, 308a2415724fb3466168b2af5b08bd94ba732c0e753Vikas Arora VP8StatusCode error, const char* const msg); 3099aea642eefa7a641ab8b89d953251939221d2719Eric Hassold 3109aea642eefa7a641ab8b89d953251939221d2719Eric Hassold// in tree.c 3119aea642eefa7a641ab8b89d953251939221d2719Eric Hassoldvoid VP8ResetProba(VP8Proba* const proba); 3129aea642eefa7a641ab8b89d953251939221d2719Eric Hassoldvoid VP8ParseProba(VP8BitReader* const br, VP8Decoder* const dec); 313af51b94a435132e9014c324e25fb686b3d07a8c8Vikas Arora// parses one row of intra mode data in partition 0, returns !eof 314af51b94a435132e9014c324e25fb686b3d07a8c8Vikas Aroraint VP8ParseIntraModeRow(VP8BitReader* const br, VP8Decoder* const dec); 3159aea642eefa7a641ab8b89d953251939221d2719Eric Hassold 3169aea642eefa7a641ab8b89d953251939221d2719Eric Hassold// in quant.c 3179aea642eefa7a641ab8b89d953251939221d2719Eric Hassoldvoid VP8ParseQuant(VP8Decoder* const dec); 3189aea642eefa7a641ab8b89d953251939221d2719Eric Hassold 3199aea642eefa7a641ab8b89d953251939221d2719Eric Hassold// in frame.c 3209aea642eefa7a641ab8b89d953251939221d2719Eric Hassoldint VP8InitFrame(VP8Decoder* const dec, VP8Io* io); 321466727975bcc57c0c5597bcd0747a2fe4777b303Vikas Arora// Call io->setup() and finish setting up scan parameters. 322a2415724fb3466168b2af5b08bd94ba732c0e753Vikas Arora// After this call returns, one must always call VP8ExitCritical() with the 323a2415724fb3466168b2af5b08bd94ba732c0e753Vikas Arora// same parameters. Both functions should be used in pair. Returns VP8_STATUS_OK 324a2415724fb3466168b2af5b08bd94ba732c0e753Vikas Arora// if ok, otherwise sets and returns the error status on *dec. 325a2415724fb3466168b2af5b08bd94ba732c0e753Vikas AroraVP8StatusCode VP8EnterCritical(VP8Decoder* const dec, VP8Io* const io); 326a2415724fb3466168b2af5b08bd94ba732c0e753Vikas Arora// Must always be called in pair with VP8EnterCritical(). 327a2415724fb3466168b2af5b08bd94ba732c0e753Vikas Arora// Returns false in case of error. 328a2415724fb3466168b2af5b08bd94ba732c0e753Vikas Aroraint VP8ExitCritical(VP8Decoder* const dec, VP8Io* const io); 3298b720228d581a84fd173b6dcb2fa295b59db489aVikas Arora// Return the multi-threading method to use (0=off), depending 3308b720228d581a84fd173b6dcb2fa295b59db489aVikas Arora// on options and bitstream size. Only for lossy decoding. 3318b720228d581a84fd173b6dcb2fa295b59db489aVikas Aroraint VP8GetThreadMethod(const WebPDecoderOptions* const options, 3328b720228d581a84fd173b6dcb2fa295b59db489aVikas Arora const WebPHeaderStructure* const headers, 3338b720228d581a84fd173b6dcb2fa295b59db489aVikas Arora int width, int height); 3348b720228d581a84fd173b6dcb2fa295b59db489aVikas Arora// Initialize dithering post-process if needed. 3358b720228d581a84fd173b6dcb2fa295b59db489aVikas Aroravoid VP8InitDithering(const WebPDecoderOptions* const options, 3368b720228d581a84fd173b6dcb2fa295b59db489aVikas Arora VP8Decoder* const dec); 3378b720228d581a84fd173b6dcb2fa295b59db489aVikas Arora// Process the last decoded row (filtering + output). 338a2415724fb3466168b2af5b08bd94ba732c0e753Vikas Aroraint VP8ProcessRow(VP8Decoder* const dec, VP8Io* const io); 339a2415724fb3466168b2af5b08bd94ba732c0e753Vikas Arora// To be called at the start of a new scanline, to initialize predictors. 340a2415724fb3466168b2af5b08bd94ba732c0e753Vikas Aroravoid VP8InitScanline(VP8Decoder* const dec); 34103d5e34c70f174c16282b0efdc6bb9473df5f8f1Vikas Arora// Decode one macroblock. Returns false if there is not enough data. 34203d5e34c70f174c16282b0efdc6bb9473df5f8f1Vikas Aroraint VP8DecodeMB(VP8Decoder* const dec, VP8BitReader* const token_br); 3439aea642eefa7a641ab8b89d953251939221d2719Eric Hassold 344466727975bcc57c0c5597bcd0747a2fe4777b303Vikas Arora// in alpha.c 345466727975bcc57c0c5597bcd0747a2fe4777b303Vikas Aroraconst uint8_t* VP8DecompressAlphaRows(VP8Decoder* const dec, 346466727975bcc57c0c5597bcd0747a2fe4777b303Vikas Arora int row, int num_rows); 347466727975bcc57c0c5597bcd0747a2fe4777b303Vikas Arora 348a2415724fb3466168b2af5b08bd94ba732c0e753Vikas Arora//------------------------------------------------------------------------------ 3499aea642eefa7a641ab8b89d953251939221d2719Eric Hassold 3508b720228d581a84fd173b6dcb2fa295b59db489aVikas Arora#ifdef __cplusplus 3519aea642eefa7a641ab8b89d953251939221d2719Eric Hassold} // extern "C" 3529aea642eefa7a641ab8b89d953251939221d2719Eric Hassold#endif 3539aea642eefa7a641ab8b89d953251939221d2719Eric Hassold 354a2415724fb3466168b2af5b08bd94ba732c0e753Vikas Arora#endif /* WEBP_DEC_VP8I_H_ */ 355