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() 18fa39824bb690c5806358871f46940d0450973d8aJames Zern#include "./common_dec.h" 19fa39824bb690c5806358871f46940d0450973d8aJames Zern#include "./vp8li_dec.h" 20fa39824bb690c5806358871f46940d0450973d8aJames Zern#include "../utils/bit_reader_utils.h" 21fa39824bb690c5806358871f46940d0450973d8aJames Zern#include "../utils/random_utils.h" 22fa39824bb690c5806358871f46940d0450973d8aJames Zern#include "../utils/thread_utils.h" 23a2415724fb3466168b2af5b08bd94ba732c0e753Vikas Arora#include "../dsp/dsp.h" 249aea642eefa7a641ab8b89d953251939221d2719Eric Hassold 258b720228d581a84fd173b6dcb2fa295b59db489aVikas Arora#ifdef __cplusplus 269aea642eefa7a641ab8b89d953251939221d2719Eric Hassoldextern "C" { 279aea642eefa7a641ab8b89d953251939221d2719Eric Hassold#endif 289aea642eefa7a641ab8b89d953251939221d2719Eric Hassold 29a2415724fb3466168b2af5b08bd94ba732c0e753Vikas Arora//------------------------------------------------------------------------------ 309aea642eefa7a641ab8b89d953251939221d2719Eric Hassold// Various defines and enums 319aea642eefa7a641ab8b89d953251939221d2719Eric Hassold 3203d5e34c70f174c16282b0efdc6bb9473df5f8f1Vikas Arora// version numbers 3303d5e34c70f174c16282b0efdc6bb9473df5f8f1Vikas Arora#define DEC_MAJ_VERSION 0 34fa39824bb690c5806358871f46940d0450973d8aJames Zern#define DEC_MIN_VERSION 6 35fa39824bb690c5806358871f46940d0450973d8aJames Zern#define DEC_REV_VERSION 0 367c8da7ce66017295a65ec028084b90800be377f8James Zern 377c8da7ce66017295a65ec028084b90800be377f8James Zern// YUV-cache parameters. Cache is 32-bytes wide (= one cacheline). 389aea642eefa7a641ab8b89d953251939221d2719Eric Hassold// Constraints are: We need to store one 16x16 block of luma samples (y), 399aea642eefa7a641ab8b89d953251939221d2719Eric Hassold// and two 8x8 chroma blocks (u/v). These are better be 16-bytes aligned, 409aea642eefa7a641ab8b89d953251939221d2719Eric Hassold// in order to be SIMD-friendly. We also need to store the top, left and 419aea642eefa7a641ab8b89d953251939221d2719Eric Hassold// top-left samples (from previously decoded blocks), along with four 429aea642eefa7a641ab8b89d953251939221d2719Eric Hassold// extra top-right samples for luma (intra4x4 prediction only). 439aea642eefa7a641ab8b89d953251939221d2719Eric Hassold// One possible layout is, using 32 * (17 + 9) bytes: 449aea642eefa7a641ab8b89d953251939221d2719Eric Hassold// 459aea642eefa7a641ab8b89d953251939221d2719Eric Hassold// .+------ <- only 1 pixel high 469aea642eefa7a641ab8b89d953251939221d2719Eric Hassold// .|yyyyt. 479aea642eefa7a641ab8b89d953251939221d2719Eric Hassold// .|yyyyt. 489aea642eefa7a641ab8b89d953251939221d2719Eric Hassold// .|yyyyt. 499aea642eefa7a641ab8b89d953251939221d2719Eric Hassold// .|yyyy.. 509aea642eefa7a641ab8b89d953251939221d2719Eric Hassold// .+--.+-- <- only 1 pixel high 519aea642eefa7a641ab8b89d953251939221d2719Eric Hassold// .|uu.|vv 529aea642eefa7a641ab8b89d953251939221d2719Eric Hassold// .|uu.|vv 539aea642eefa7a641ab8b89d953251939221d2719Eric Hassold// 549aea642eefa7a641ab8b89d953251939221d2719Eric Hassold// Every character is a 4x4 block, with legend: 559aea642eefa7a641ab8b89d953251939221d2719Eric Hassold// '.' = unused 569aea642eefa7a641ab8b89d953251939221d2719Eric Hassold// 'y' = y-samples 'u' = u-samples 'v' = u-samples 579aea642eefa7a641ab8b89d953251939221d2719Eric Hassold// '|' = left sample, '-' = top sample, '+' = top-left sample 589aea642eefa7a641ab8b89d953251939221d2719Eric Hassold// 't' = extra top-right sample for 4x4 modes 599aea642eefa7a641ab8b89d953251939221d2719Eric Hassold#define YUV_SIZE (BPS * 17 + BPS * 9) 609aea642eefa7a641ab8b89d953251939221d2719Eric Hassold#define Y_SIZE (BPS * 17) 619aea642eefa7a641ab8b89d953251939221d2719Eric Hassold#define Y_OFF (BPS * 1 + 8) 629aea642eefa7a641ab8b89d953251939221d2719Eric Hassold#define U_OFF (Y_OFF + BPS * 16 + BPS) 639aea642eefa7a641ab8b89d953251939221d2719Eric Hassold#define V_OFF (U_OFF + 16) 649aea642eefa7a641ab8b89d953251939221d2719Eric Hassold 658b720228d581a84fd173b6dcb2fa295b59db489aVikas Arora// minimal width under which lossy multi-threading is always disabled 668b720228d581a84fd173b6dcb2fa295b59db489aVikas Arora#define MIN_WIDTH_FOR_THREADS 512 678b720228d581a84fd173b6dcb2fa295b59db489aVikas Arora 68a2415724fb3466168b2af5b08bd94ba732c0e753Vikas Arora//------------------------------------------------------------------------------ 699aea642eefa7a641ab8b89d953251939221d2719Eric Hassold// Headers 709aea642eefa7a641ab8b89d953251939221d2719Eric Hassold 719aea642eefa7a641ab8b89d953251939221d2719Eric Hassoldtypedef struct { 729aea642eefa7a641ab8b89d953251939221d2719Eric Hassold uint8_t key_frame_; 739aea642eefa7a641ab8b89d953251939221d2719Eric Hassold uint8_t profile_; 749aea642eefa7a641ab8b89d953251939221d2719Eric Hassold uint8_t show_; 759aea642eefa7a641ab8b89d953251939221d2719Eric Hassold uint32_t partition_length_; 769aea642eefa7a641ab8b89d953251939221d2719Eric Hassold} VP8FrameHeader; 779aea642eefa7a641ab8b89d953251939221d2719Eric Hassold 789aea642eefa7a641ab8b89d953251939221d2719Eric Hassoldtypedef struct { 799aea642eefa7a641ab8b89d953251939221d2719Eric Hassold uint16_t width_; 809aea642eefa7a641ab8b89d953251939221d2719Eric Hassold uint16_t height_; 819aea642eefa7a641ab8b89d953251939221d2719Eric Hassold uint8_t xscale_; 829aea642eefa7a641ab8b89d953251939221d2719Eric Hassold uint8_t yscale_; 839aea642eefa7a641ab8b89d953251939221d2719Eric Hassold uint8_t colorspace_; // 0 = YCbCr 849aea642eefa7a641ab8b89d953251939221d2719Eric Hassold uint8_t clamp_type_; 859aea642eefa7a641ab8b89d953251939221d2719Eric Hassold} VP8PictureHeader; 869aea642eefa7a641ab8b89d953251939221d2719Eric Hassold 879aea642eefa7a641ab8b89d953251939221d2719Eric Hassold// segment features 889aea642eefa7a641ab8b89d953251939221d2719Eric Hassoldtypedef struct { 899aea642eefa7a641ab8b89d953251939221d2719Eric Hassold int use_segment_; 909aea642eefa7a641ab8b89d953251939221d2719Eric Hassold int update_map_; // whether to update the segment map or not 919aea642eefa7a641ab8b89d953251939221d2719Eric Hassold int absolute_delta_; // absolute or delta values for quantizer and filter 929aea642eefa7a641ab8b89d953251939221d2719Eric Hassold int8_t quantizer_[NUM_MB_SEGMENTS]; // quantization changes 939aea642eefa7a641ab8b89d953251939221d2719Eric Hassold int8_t filter_strength_[NUM_MB_SEGMENTS]; // filter strength for segments 949aea642eefa7a641ab8b89d953251939221d2719Eric Hassold} VP8SegmentHeader; 959aea642eefa7a641ab8b89d953251939221d2719Eric Hassold 968b720228d581a84fd173b6dcb2fa295b59db489aVikas Arora// probas associated to one of the contexts 978b720228d581a84fd173b6dcb2fa295b59db489aVikas Aroratypedef uint8_t VP8ProbaArray[NUM_PROBAS]; 988b720228d581a84fd173b6dcb2fa295b59db489aVikas Arora 998b720228d581a84fd173b6dcb2fa295b59db489aVikas Aroratypedef struct { // all the probas associated to one band 1008b720228d581a84fd173b6dcb2fa295b59db489aVikas Arora VP8ProbaArray probas_[NUM_CTX]; 1018b720228d581a84fd173b6dcb2fa295b59db489aVikas Arora} VP8BandProbas; 1028b720228d581a84fd173b6dcb2fa295b59db489aVikas Arora 1039aea642eefa7a641ab8b89d953251939221d2719Eric Hassold// Struct collecting all frame-persistent probabilities. 1049aea642eefa7a641ab8b89d953251939221d2719Eric Hassoldtypedef struct { 1059aea642eefa7a641ab8b89d953251939221d2719Eric Hassold uint8_t segments_[MB_FEATURE_TREE_PROBS]; 1069aea642eefa7a641ab8b89d953251939221d2719Eric Hassold // Type: 0:Intra16-AC 1:Intra16-DC 2:Chroma 3:Intra4 1078b720228d581a84fd173b6dcb2fa295b59db489aVikas Arora VP8BandProbas bands_[NUM_TYPES][NUM_BANDS]; 1087c8da7ce66017295a65ec028084b90800be377f8James Zern const VP8BandProbas* bands_ptr_[NUM_TYPES][16 + 1]; 1099aea642eefa7a641ab8b89d953251939221d2719Eric Hassold} VP8Proba; 1109aea642eefa7a641ab8b89d953251939221d2719Eric Hassold 1119aea642eefa7a641ab8b89d953251939221d2719Eric Hassold// Filter parameters 1129aea642eefa7a641ab8b89d953251939221d2719Eric Hassoldtypedef struct { 1139aea642eefa7a641ab8b89d953251939221d2719Eric Hassold int simple_; // 0=complex, 1=simple 1149aea642eefa7a641ab8b89d953251939221d2719Eric Hassold int level_; // [0..63] 1159aea642eefa7a641ab8b89d953251939221d2719Eric Hassold int sharpness_; // [0..7] 1169aea642eefa7a641ab8b89d953251939221d2719Eric Hassold int use_lf_delta_; 1179aea642eefa7a641ab8b89d953251939221d2719Eric Hassold int ref_lf_delta_[NUM_REF_LF_DELTAS]; 1189aea642eefa7a641ab8b89d953251939221d2719Eric Hassold int mode_lf_delta_[NUM_MODE_LF_DELTAS]; 1199aea642eefa7a641ab8b89d953251939221d2719Eric Hassold} VP8FilterHeader; 1209aea642eefa7a641ab8b89d953251939221d2719Eric Hassold 121a2415724fb3466168b2af5b08bd94ba732c0e753Vikas Arora//------------------------------------------------------------------------------ 1229aea642eefa7a641ab8b89d953251939221d2719Eric Hassold// Informations about the macroblocks. 1239aea642eefa7a641ab8b89d953251939221d2719Eric Hassold 124a2415724fb3466168b2af5b08bd94ba732c0e753Vikas Aroratypedef struct { // filter specs 1258b720228d581a84fd173b6dcb2fa295b59db489aVikas Arora uint8_t f_limit_; // filter limit in [3..189], or 0 if no filtering 1268b720228d581a84fd173b6dcb2fa295b59db489aVikas Arora uint8_t f_ilevel_; // inner limit in [1..63] 1278b720228d581a84fd173b6dcb2fa295b59db489aVikas Arora uint8_t f_inner_; // do inner filtering? 1288b720228d581a84fd173b6dcb2fa295b59db489aVikas Arora uint8_t hev_thresh_; // high edge variance threshold in [0..2] 129a2415724fb3466168b2af5b08bd94ba732c0e753Vikas Arora} VP8FInfo; 130a2415724fb3466168b2af5b08bd94ba732c0e753Vikas Arora 1318b720228d581a84fd173b6dcb2fa295b59db489aVikas Aroratypedef struct { // Top/Left Contexts used for syntax-parsing 1328b720228d581a84fd173b6dcb2fa295b59db489aVikas Arora uint8_t nz_; // non-zero AC/DC coeffs (4bit for luma + 4bit for chroma) 1338b720228d581a84fd173b6dcb2fa295b59db489aVikas Arora uint8_t nz_dc_; // non-zero DC coeff (1bit) 1349aea642eefa7a641ab8b89d953251939221d2719Eric Hassold} VP8MB; 1359aea642eefa7a641ab8b89d953251939221d2719Eric Hassold 1369aea642eefa7a641ab8b89d953251939221d2719Eric Hassold// Dequantization matrices 137a2415724fb3466168b2af5b08bd94ba732c0e753Vikas Aroratypedef int quant_t[2]; // [DC / AC]. Can be 'uint16_t[2]' too (~slower). 1389aea642eefa7a641ab8b89d953251939221d2719Eric Hassoldtypedef struct { 139a2415724fb3466168b2af5b08bd94ba732c0e753Vikas Arora quant_t y1_mat_, y2_mat_, uv_mat_; 1408b720228d581a84fd173b6dcb2fa295b59db489aVikas Arora 1418b720228d581a84fd173b6dcb2fa295b59db489aVikas Arora int uv_quant_; // U/V quantizer value 1428b720228d581a84fd173b6dcb2fa295b59db489aVikas Arora int dither_; // dithering amplitude (0 = off, max=255) 1439aea642eefa7a641ab8b89d953251939221d2719Eric Hassold} VP8QuantMatrix; 1449aea642eefa7a641ab8b89d953251939221d2719Eric Hassold 1458b720228d581a84fd173b6dcb2fa295b59db489aVikas Arora// Data needed to reconstruct a macroblock 1468b720228d581a84fd173b6dcb2fa295b59db489aVikas Aroratypedef struct { 1478b720228d581a84fd173b6dcb2fa295b59db489aVikas Arora int16_t coeffs_[384]; // 384 coeffs = (16+4+4) * 4*4 1488b720228d581a84fd173b6dcb2fa295b59db489aVikas Arora uint8_t is_i4x4_; // true if intra4x4 1498b720228d581a84fd173b6dcb2fa295b59db489aVikas Arora uint8_t imodes_[16]; // one 16x16 mode (#0) or sixteen 4x4 modes 1508b720228d581a84fd173b6dcb2fa295b59db489aVikas Arora uint8_t uvmode_; // chroma prediction mode 1518b720228d581a84fd173b6dcb2fa295b59db489aVikas Arora // bit-wise info about the content of each sub-4x4 blocks (in decoding order). 1528b720228d581a84fd173b6dcb2fa295b59db489aVikas Arora // Each of the 4x4 blocks for y/u/v is associated with a 2b code according to: 1538b720228d581a84fd173b6dcb2fa295b59db489aVikas Arora // code=0 -> no coefficient 1548b720228d581a84fd173b6dcb2fa295b59db489aVikas Arora // code=1 -> only DC 1558b720228d581a84fd173b6dcb2fa295b59db489aVikas Arora // code=2 -> first three coefficients are non-zero 1568b720228d581a84fd173b6dcb2fa295b59db489aVikas Arora // code=3 -> more than three coefficients are non-zero 1578b720228d581a84fd173b6dcb2fa295b59db489aVikas Arora // This allows to call specialized transform functions. 1588b720228d581a84fd173b6dcb2fa295b59db489aVikas Arora uint32_t non_zero_y_; 1598b720228d581a84fd173b6dcb2fa295b59db489aVikas Arora uint32_t non_zero_uv_; 1608b720228d581a84fd173b6dcb2fa295b59db489aVikas Arora uint8_t dither_; // local dithering strength (deduced from non_zero_*) 16133f74dabbc7920a65ed435d7417987589febdc16Vikas Arora uint8_t skip_; 16233f74dabbc7920a65ed435d7417987589febdc16Vikas Arora uint8_t segment_; 1638b720228d581a84fd173b6dcb2fa295b59db489aVikas Arora} VP8MBData; 1648b720228d581a84fd173b6dcb2fa295b59db489aVikas Arora 165a2415724fb3466168b2af5b08bd94ba732c0e753Vikas Arora// Persistent information needed by the parallel processing 166a2415724fb3466168b2af5b08bd94ba732c0e753Vikas Aroratypedef struct { 1678b720228d581a84fd173b6dcb2fa295b59db489aVikas Arora int id_; // cache row to process (in [0..2]) 1688b720228d581a84fd173b6dcb2fa295b59db489aVikas Arora int mb_y_; // macroblock position of the row 1698b720228d581a84fd173b6dcb2fa295b59db489aVikas Arora int filter_row_; // true if row-filtering is needed 1708b720228d581a84fd173b6dcb2fa295b59db489aVikas Arora VP8FInfo* f_info_; // filter strengths (swapped with dec->f_info_) 1718b720228d581a84fd173b6dcb2fa295b59db489aVikas Arora VP8MBData* mb_data_; // reconstruction data (swapped with dec->mb_data_) 1728b720228d581a84fd173b6dcb2fa295b59db489aVikas Arora VP8Io io_; // copy of the VP8Io to pass to put() 173a2415724fb3466168b2af5b08bd94ba732c0e753Vikas Arora} VP8ThreadContext; 174a2415724fb3466168b2af5b08bd94ba732c0e753Vikas Arora 1758b720228d581a84fd173b6dcb2fa295b59db489aVikas Arora// Saved top samples, per macroblock. Fits into a cache-line. 1768b720228d581a84fd173b6dcb2fa295b59db489aVikas Aroratypedef struct { 1778b720228d581a84fd173b6dcb2fa295b59db489aVikas Arora uint8_t y[16], u[8], v[8]; 1788b720228d581a84fd173b6dcb2fa295b59db489aVikas Arora} VP8TopSamples; 1798b720228d581a84fd173b6dcb2fa295b59db489aVikas Arora 180a2415724fb3466168b2af5b08bd94ba732c0e753Vikas Arora//------------------------------------------------------------------------------ 1819aea642eefa7a641ab8b89d953251939221d2719Eric Hassold// VP8Decoder: the main opaque structure handed over to user 1829aea642eefa7a641ab8b89d953251939221d2719Eric Hassold 1839aea642eefa7a641ab8b89d953251939221d2719Eric Hassoldstruct VP8Decoder { 18403d5e34c70f174c16282b0efdc6bb9473df5f8f1Vikas Arora VP8StatusCode status_; 1859aea642eefa7a641ab8b89d953251939221d2719Eric Hassold int ready_; // true if ready to decode a picture with VP8Decode() 1869aea642eefa7a641ab8b89d953251939221d2719Eric Hassold const char* error_msg_; // set when status_ is not OK. 1879aea642eefa7a641ab8b89d953251939221d2719Eric Hassold 1889aea642eefa7a641ab8b89d953251939221d2719Eric Hassold // Main data source 1899aea642eefa7a641ab8b89d953251939221d2719Eric Hassold VP8BitReader br_; 1909aea642eefa7a641ab8b89d953251939221d2719Eric Hassold 1919aea642eefa7a641ab8b89d953251939221d2719Eric Hassold // headers 1929aea642eefa7a641ab8b89d953251939221d2719Eric Hassold VP8FrameHeader frm_hdr_; 1939aea642eefa7a641ab8b89d953251939221d2719Eric Hassold VP8PictureHeader pic_hdr_; 1949aea642eefa7a641ab8b89d953251939221d2719Eric Hassold VP8FilterHeader filter_hdr_; 1959aea642eefa7a641ab8b89d953251939221d2719Eric Hassold VP8SegmentHeader segment_hdr_; 1969aea642eefa7a641ab8b89d953251939221d2719Eric Hassold 197a2415724fb3466168b2af5b08bd94ba732c0e753Vikas Arora // Worker 198a2415724fb3466168b2af5b08bd94ba732c0e753Vikas Arora WebPWorker worker_; 1998b720228d581a84fd173b6dcb2fa295b59db489aVikas Arora int mt_method_; // multi-thread method: 0=off, 1=[parse+recon][filter] 2008b720228d581a84fd173b6dcb2fa295b59db489aVikas Arora // 2=[parse][recon+filter] 201a2415724fb3466168b2af5b08bd94ba732c0e753Vikas Arora int cache_id_; // current cache row 202a2415724fb3466168b2af5b08bd94ba732c0e753Vikas Arora int num_caches_; // number of cached rows of 16 pixels (1, 2 or 3) 203a2415724fb3466168b2af5b08bd94ba732c0e753Vikas Arora VP8ThreadContext thread_ctx_; // Thread context 204a2415724fb3466168b2af5b08bd94ba732c0e753Vikas Arora 2059aea642eefa7a641ab8b89d953251939221d2719Eric Hassold // dimension, in macroblock units. 2069aea642eefa7a641ab8b89d953251939221d2719Eric Hassold int mb_w_, mb_h_; 2079aea642eefa7a641ab8b89d953251939221d2719Eric Hassold 208466727975bcc57c0c5597bcd0747a2fe4777b303Vikas Arora // Macroblock to process/filter, depending on cropping and filter_type. 209466727975bcc57c0c5597bcd0747a2fe4777b303Vikas Arora int tl_mb_x_, tl_mb_y_; // top-left MB that must be in-loop filtered 210466727975bcc57c0c5597bcd0747a2fe4777b303Vikas Arora int br_mb_x_, br_mb_y_; // last bottom-right MB that must be decoded 211466727975bcc57c0c5597bcd0747a2fe4777b303Vikas Arora 2120912efc2528d03c59d45dd9bdc9ff9ec800a3fc1James Zern // number of partitions minus one. 2130912efc2528d03c59d45dd9bdc9ff9ec800a3fc1James Zern uint32_t num_parts_minus_one_; 2149aea642eefa7a641ab8b89d953251939221d2719Eric Hassold // per-partition boolean decoders. 2159aea642eefa7a641ab8b89d953251939221d2719Eric Hassold VP8BitReader parts_[MAX_NUM_PARTITIONS]; 2169aea642eefa7a641ab8b89d953251939221d2719Eric Hassold 2178b720228d581a84fd173b6dcb2fa295b59db489aVikas Arora // Dithering strength, deduced from decoding options 2188b720228d581a84fd173b6dcb2fa295b59db489aVikas Arora int dither_; // whether to use dithering or not 2198b720228d581a84fd173b6dcb2fa295b59db489aVikas Arora VP8Random dithering_rg_; // random generator for dithering 2209aea642eefa7a641ab8b89d953251939221d2719Eric Hassold 2219aea642eefa7a641ab8b89d953251939221d2719Eric Hassold // dequantization (one set of DC/AC dequant factor per segment) 2229aea642eefa7a641ab8b89d953251939221d2719Eric Hassold VP8QuantMatrix dqm_[NUM_MB_SEGMENTS]; 2239aea642eefa7a641ab8b89d953251939221d2719Eric Hassold 2249aea642eefa7a641ab8b89d953251939221d2719Eric Hassold // probabilities 2259aea642eefa7a641ab8b89d953251939221d2719Eric Hassold VP8Proba proba_; 2269aea642eefa7a641ab8b89d953251939221d2719Eric Hassold int use_skip_proba_; 2279aea642eefa7a641ab8b89d953251939221d2719Eric Hassold uint8_t skip_p_; 2289aea642eefa7a641ab8b89d953251939221d2719Eric Hassold 2299aea642eefa7a641ab8b89d953251939221d2719Eric Hassold // Boundary data cache and persistent buffers. 2308b720228d581a84fd173b6dcb2fa295b59db489aVikas Arora uint8_t* intra_t_; // top intra modes values: 4 * mb_w_ 2318b720228d581a84fd173b6dcb2fa295b59db489aVikas Arora uint8_t intra_l_[4]; // left intra modes values 2328b720228d581a84fd173b6dcb2fa295b59db489aVikas Arora 2338b720228d581a84fd173b6dcb2fa295b59db489aVikas Arora VP8TopSamples* yuv_t_; // top y/u/v samples 2349aea642eefa7a641ab8b89d953251939221d2719Eric Hassold 2358b720228d581a84fd173b6dcb2fa295b59db489aVikas Arora VP8MB* mb_info_; // contextual macroblock info (mb_w_ + 1) 2368b720228d581a84fd173b6dcb2fa295b59db489aVikas Arora VP8FInfo* f_info_; // filter strength info 2378b720228d581a84fd173b6dcb2fa295b59db489aVikas Arora uint8_t* yuv_b_; // main block for Y/U/V (size = YUV_SIZE) 2389aea642eefa7a641ab8b89d953251939221d2719Eric Hassold 2398b720228d581a84fd173b6dcb2fa295b59db489aVikas Arora uint8_t* cache_y_; // macroblock row for storing unfiltered samples 2409aea642eefa7a641ab8b89d953251939221d2719Eric Hassold uint8_t* cache_u_; 2419aea642eefa7a641ab8b89d953251939221d2719Eric Hassold uint8_t* cache_v_; 2429aea642eefa7a641ab8b89d953251939221d2719Eric Hassold int cache_y_stride_; 2439aea642eefa7a641ab8b89d953251939221d2719Eric Hassold int cache_uv_stride_; 2449aea642eefa7a641ab8b89d953251939221d2719Eric Hassold 2459aea642eefa7a641ab8b89d953251939221d2719Eric Hassold // main memory chunk for the above data. Persistent. 2469aea642eefa7a641ab8b89d953251939221d2719Eric Hassold void* mem_; 247a2415724fb3466168b2af5b08bd94ba732c0e753Vikas Arora size_t mem_size_; 2489aea642eefa7a641ab8b89d953251939221d2719Eric Hassold 2499aea642eefa7a641ab8b89d953251939221d2719Eric Hassold // Per macroblock non-persistent infos. 2509aea642eefa7a641ab8b89d953251939221d2719Eric Hassold int mb_x_, mb_y_; // current position, in macroblock units 2518b720228d581a84fd173b6dcb2fa295b59db489aVikas Arora VP8MBData* mb_data_; // parsed reconstruction data 2529aea642eefa7a641ab8b89d953251939221d2719Eric Hassold 2539aea642eefa7a641ab8b89d953251939221d2719Eric Hassold // Filtering side-info 2541e7bf8805bd030c19924a5306837ecd72c295751Vikas Arora int filter_type_; // 0=off, 1=simple, 2=complex 2551e7bf8805bd030c19924a5306837ecd72c295751Vikas Arora VP8FInfo fstrengths_[NUM_MB_SEGMENTS][2]; // precalculated per-segment/type 256466727975bcc57c0c5597bcd0747a2fe4777b303Vikas Arora 2578b720228d581a84fd173b6dcb2fa295b59db489aVikas Arora // Alpha 2588b720228d581a84fd173b6dcb2fa295b59db489aVikas Arora struct ALPHDecoder* alph_dec_; // alpha-plane decoder object 2598b720228d581a84fd173b6dcb2fa295b59db489aVikas Arora const uint8_t* alpha_data_; // compressed alpha data (if present) 260466727975bcc57c0c5597bcd0747a2fe4777b303Vikas Arora size_t alpha_data_size_; 2610912efc2528d03c59d45dd9bdc9ff9ec800a3fc1James Zern int is_alpha_decoded_; // true if alpha_data_ is decoded in alpha_plane_ 2620912efc2528d03c59d45dd9bdc9ff9ec800a3fc1James Zern uint8_t* alpha_plane_mem_; // memory allocated for alpha_plane_ 2630912efc2528d03c59d45dd9bdc9ff9ec800a3fc1James Zern uint8_t* alpha_plane_; // output. Persistent, contains the whole data. 2640912efc2528d03c59d45dd9bdc9ff9ec800a3fc1James Zern const uint8_t* alpha_prev_line_; // last decoded alpha row (or NULL) 2650912efc2528d03c59d45dd9bdc9ff9ec800a3fc1James Zern int alpha_dithering_; // derived from decoding options (0=off, 100=full) 2669aea642eefa7a641ab8b89d953251939221d2719Eric Hassold}; 2679aea642eefa7a641ab8b89d953251939221d2719Eric Hassold 268a2415724fb3466168b2af5b08bd94ba732c0e753Vikas Arora//------------------------------------------------------------------------------ 2699aea642eefa7a641ab8b89d953251939221d2719Eric Hassold// internal functions. Not public. 2709aea642eefa7a641ab8b89d953251939221d2719Eric Hassold 2719aea642eefa7a641ab8b89d953251939221d2719Eric Hassold// in vp8.c 27203d5e34c70f174c16282b0efdc6bb9473df5f8f1Vikas Aroraint VP8SetError(VP8Decoder* const dec, 273a2415724fb3466168b2af5b08bd94ba732c0e753Vikas Arora VP8StatusCode error, const char* const msg); 2749aea642eefa7a641ab8b89d953251939221d2719Eric Hassold 2759aea642eefa7a641ab8b89d953251939221d2719Eric Hassold// in tree.c 2769aea642eefa7a641ab8b89d953251939221d2719Eric Hassoldvoid VP8ResetProba(VP8Proba* const proba); 2779aea642eefa7a641ab8b89d953251939221d2719Eric Hassoldvoid VP8ParseProba(VP8BitReader* const br, VP8Decoder* const dec); 27833f74dabbc7920a65ed435d7417987589febdc16Vikas Arora// parses one row of intra mode data in partition 0, returns !eof 27933f74dabbc7920a65ed435d7417987589febdc16Vikas Aroraint VP8ParseIntraModeRow(VP8BitReader* const br, VP8Decoder* const dec); 2809aea642eefa7a641ab8b89d953251939221d2719Eric Hassold 2819aea642eefa7a641ab8b89d953251939221d2719Eric Hassold// in quant.c 2829aea642eefa7a641ab8b89d953251939221d2719Eric Hassoldvoid VP8ParseQuant(VP8Decoder* const dec); 2839aea642eefa7a641ab8b89d953251939221d2719Eric Hassold 2849aea642eefa7a641ab8b89d953251939221d2719Eric Hassold// in frame.c 2857c8da7ce66017295a65ec028084b90800be377f8James Zernint VP8InitFrame(VP8Decoder* const dec, VP8Io* const io); 286466727975bcc57c0c5597bcd0747a2fe4777b303Vikas Arora// Call io->setup() and finish setting up scan parameters. 287a2415724fb3466168b2af5b08bd94ba732c0e753Vikas Arora// After this call returns, one must always call VP8ExitCritical() with the 288a2415724fb3466168b2af5b08bd94ba732c0e753Vikas Arora// same parameters. Both functions should be used in pair. Returns VP8_STATUS_OK 289a2415724fb3466168b2af5b08bd94ba732c0e753Vikas Arora// if ok, otherwise sets and returns the error status on *dec. 290a2415724fb3466168b2af5b08bd94ba732c0e753Vikas AroraVP8StatusCode VP8EnterCritical(VP8Decoder* const dec, VP8Io* const io); 291a2415724fb3466168b2af5b08bd94ba732c0e753Vikas Arora// Must always be called in pair with VP8EnterCritical(). 292a2415724fb3466168b2af5b08bd94ba732c0e753Vikas Arora// Returns false in case of error. 293a2415724fb3466168b2af5b08bd94ba732c0e753Vikas Aroraint VP8ExitCritical(VP8Decoder* const dec, VP8Io* const io); 2948b720228d581a84fd173b6dcb2fa295b59db489aVikas Arora// Return the multi-threading method to use (0=off), depending 2958b720228d581a84fd173b6dcb2fa295b59db489aVikas Arora// on options and bitstream size. Only for lossy decoding. 2968b720228d581a84fd173b6dcb2fa295b59db489aVikas Aroraint VP8GetThreadMethod(const WebPDecoderOptions* const options, 2978b720228d581a84fd173b6dcb2fa295b59db489aVikas Arora const WebPHeaderStructure* const headers, 2988b720228d581a84fd173b6dcb2fa295b59db489aVikas Arora int width, int height); 2998b720228d581a84fd173b6dcb2fa295b59db489aVikas Arora// Initialize dithering post-process if needed. 3008b720228d581a84fd173b6dcb2fa295b59db489aVikas Aroravoid VP8InitDithering(const WebPDecoderOptions* const options, 3018b720228d581a84fd173b6dcb2fa295b59db489aVikas Arora VP8Decoder* const dec); 3028b720228d581a84fd173b6dcb2fa295b59db489aVikas Arora// Process the last decoded row (filtering + output). 303a2415724fb3466168b2af5b08bd94ba732c0e753Vikas Aroraint VP8ProcessRow(VP8Decoder* const dec, VP8Io* const io); 304a2415724fb3466168b2af5b08bd94ba732c0e753Vikas Arora// To be called at the start of a new scanline, to initialize predictors. 305a2415724fb3466168b2af5b08bd94ba732c0e753Vikas Aroravoid VP8InitScanline(VP8Decoder* const dec); 30603d5e34c70f174c16282b0efdc6bb9473df5f8f1Vikas Arora// Decode one macroblock. Returns false if there is not enough data. 30703d5e34c70f174c16282b0efdc6bb9473df5f8f1Vikas Aroraint VP8DecodeMB(VP8Decoder* const dec, VP8BitReader* const token_br); 3089aea642eefa7a641ab8b89d953251939221d2719Eric Hassold 309466727975bcc57c0c5597bcd0747a2fe4777b303Vikas Arora// in alpha.c 310466727975bcc57c0c5597bcd0747a2fe4777b303Vikas Aroraconst uint8_t* VP8DecompressAlphaRows(VP8Decoder* const dec, 3110912efc2528d03c59d45dd9bdc9ff9ec800a3fc1James Zern const VP8Io* const io, 312466727975bcc57c0c5597bcd0747a2fe4777b303Vikas Arora int row, int num_rows); 313466727975bcc57c0c5597bcd0747a2fe4777b303Vikas Arora 314a2415724fb3466168b2af5b08bd94ba732c0e753Vikas Arora//------------------------------------------------------------------------------ 3159aea642eefa7a641ab8b89d953251939221d2719Eric Hassold 3168b720228d581a84fd173b6dcb2fa295b59db489aVikas Arora#ifdef __cplusplus 3179aea642eefa7a641ab8b89d953251939221d2719Eric Hassold} // extern "C" 3189aea642eefa7a641ab8b89d953251939221d2719Eric Hassold#endif 3199aea642eefa7a641ab8b89d953251939221d2719Eric Hassold 320a2415724fb3466168b2af5b08bd94ba732c0e753Vikas Arora#endif /* WEBP_DEC_VP8I_H_ */ 321