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bh=QNEr6dt3sqwYLrSOzbWkct6/9aurszZL8M0aVXJrzmw=; b=osebKUYK3x1p9mg3gCuJ5zDtJvpTeVtu5TzXZ3hb6AXI1J3KtSrjBzTjLzEIpfPLFg vMchdhp1RmyNL5ZRUNt1arTm+czjZGX4a9E9gVKXwNrU/swFWjYrtlLywYMxWZ0ZC46o hYgY5GlBRi5lwUbvLTkJ2NjZgoyYVXOy5dxBIcCh4TThiandhX0PaSXPyA5wuK81fhEm kenv0A2D/Q+hcJapeDtFszBdT4Ix90DS26e3jhWa7kBWyj3euitE98wcDiFBuH+vIsDm copIi5+e8YL8YrovsXmtFTHE3ZyJCSaLIeoL4ucS91T0ejJ6QQyLxKaTBYEo4G9MizyA PGQA== X-Gm-Message-State: ANoB5pnqOfyjH5ZtPZZ1cREdLdzy4E5Cgt4w+LDXKtut/gdLw3fj0G7Y VGrIylnCoeuZxokictRmDdxiSJJqW4P8HA== X-Received: by 2002:a05:600c:1e84:b0:3cf:7195:e569 with SMTP id be4-20020a05600c1e8400b003cf7195e569mr23414122wmb.40.1671130815476; Thu, 15 Dec 2022 11:00:15 -0800 (PST) Received: from localhost.localdomain ([41.80.112.89]) by smtp.gmail.com with ESMTPSA id bd26-20020a05600c1f1a00b003d070e45574sm14128wmb.11.2022.12.15.11.00.13 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Thu, 15 Dec 2022 11:00:14 -0800 (PST) From: etemesicaleb@gmail.com To: ffmpeg-devel@ffmpeg.org Date: Thu, 15 Dec 2022 21:59:59 +0300 Message-Id: <20221215185959.19191-1-etemesicaleb@gmail.com> X-Mailer: git-send-email 2.37.2 MIME-Version: 1.0 Subject: [FFmpeg-devel] [PATCH 1/2] avcodec/jpeg2000dec: Move decoder structs to header files X-BeenThere: ffmpeg-devel@ffmpeg.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: FFmpeg development discussions and patches List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Reply-To: FFmpeg development discussions and patches Cc: caleb , pal@sandflow.com, git@haerdin.se Errors-To: ffmpeg-devel-bounces@ffmpeg.org Sender: "ffmpeg-devel" X-TUID: P0a23k0PsuSx From: caleb This should pave way for HTJ2K decoding --- libavcodec/jpeg2000dec.c | 96 +---------------------------- libavcodec/jpeg2000dec.h | 126 +++++++++++++++++++++++++++++++++++++++ 2 files changed, 127 insertions(+), 95 deletions(-) create mode 100644 libavcodec/jpeg2000dec.h diff --git a/libavcodec/jpeg2000dec.c b/libavcodec/jpeg2000dec.c index c2b81ec103..7fc09cb558 100644 --- a/libavcodec/jpeg2000dec.c +++ b/libavcodec/jpeg2000dec.c @@ -42,101 +42,7 @@ #include "jpeg2000.h" #include "jpeg2000dsp.h" #include "profiles.h" - -#define JP2_SIG_TYPE 0x6A502020 -#define JP2_SIG_VALUE 0x0D0A870A -#define JP2_CODESTREAM 0x6A703263 -#define JP2_HEADER 0x6A703268 - -#define HAD_COC 0x01 -#define HAD_QCC 0x02 - -#define MAX_POCS 32 - -typedef struct Jpeg2000POCEntry { - uint16_t LYEpoc; - uint16_t CSpoc; - uint16_t CEpoc; - uint8_t RSpoc; - uint8_t REpoc; - uint8_t Ppoc; -} Jpeg2000POCEntry; - -typedef struct Jpeg2000POC { - Jpeg2000POCEntry poc[MAX_POCS]; - int nb_poc; - int is_default; -} Jpeg2000POC; - -typedef struct Jpeg2000TilePart { - uint8_t tile_index; // Tile index who refers the tile-part - const uint8_t *tp_end; - GetByteContext header_tpg; // bit stream of header if PPM header is used - GetByteContext tpg; // bit stream in tile-part -} Jpeg2000TilePart; - -/* RMK: For JPEG2000 DCINEMA 3 tile-parts in a tile - * one per component, so tile_part elements have a size of 3 */ -typedef struct Jpeg2000Tile { - Jpeg2000Component *comp; - uint8_t properties[4]; - Jpeg2000CodingStyle codsty[4]; - Jpeg2000QuantStyle qntsty[4]; - Jpeg2000POC poc; - Jpeg2000TilePart tile_part[32]; - uint8_t has_ppt; // whether this tile has a ppt marker - uint8_t *packed_headers; // contains packed headers. Used only along with PPT marker - int packed_headers_size; // size in bytes of the packed headers - GetByteContext packed_headers_stream; // byte context corresponding to packed headers - uint16_t tp_idx; // Tile-part index - int coord[2][2]; // border coordinates {{x0, x1}, {y0, y1}} -} Jpeg2000Tile; - -typedef struct Jpeg2000DecoderContext { - AVClass *class; - AVCodecContext *avctx; - GetByteContext g; - - int width, height; - int image_offset_x, image_offset_y; - int tile_offset_x, tile_offset_y; - uint8_t cbps[4]; // bits per sample in particular components - uint8_t sgnd[4]; // if a component is signed - uint8_t properties[4]; - - uint8_t has_ppm; - uint8_t *packed_headers; // contains packed headers. Used only along with PPM marker - int packed_headers_size; - GetByteContext packed_headers_stream; - uint8_t in_tile_headers; - - int cdx[4], cdy[4]; - int precision; - int ncomponents; - int colour_space; - uint32_t palette[256]; - int8_t pal8; - int cdef[4]; - int tile_width, tile_height; - unsigned numXtiles, numYtiles; - int maxtilelen; - AVRational sar; - - Jpeg2000CodingStyle codsty[4]; - Jpeg2000QuantStyle qntsty[4]; - Jpeg2000POC poc; - uint8_t roi_shift[4]; - - int bit_index; - - int curtileno; - - Jpeg2000Tile *tile; - Jpeg2000DSPContext dsp; - - /*options parameters*/ - int reduction_factor; -} Jpeg2000DecoderContext; +#include "jpeg2000dec.h" /* get_bits functions for JPEG2000 packet bitstream * It is a get_bit function with a bit-stuffing routine. If the value of the diff --git a/libavcodec/jpeg2000dec.h b/libavcodec/jpeg2000dec.h new file mode 100644 index 0000000000..b6410c1432 --- /dev/null +++ b/libavcodec/jpeg2000dec.h @@ -0,0 +1,126 @@ +/* + * JPEG 2000 image decoder + * Copyright (c) 2007 Kamil Nowosad + * Copyright (c) 2013 Nicolas Bertrand + * Copyright (c) 2022 Caleb Etemesi + * + * This file is part of FFmpeg. + * + * FFmpeg is free software; you can redistribute it and/or + * modify it under the terms of the GNU Lesser General Public + * License as published by the Free Software Foundation; either + * version 2.1 of the License, or (at your option) any later version. + * + * FFmpeg is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + * Lesser General Public License for more details. + * + * You should have received a copy of the GNU Lesser General Public + * License along with FFmpeg; if not, write to the Free Software + * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA + */ + +#ifndef AVCODEC_JPEG2000DEC_H +#define AVCODEC_JPEG2000DEC_H + +#include "bytestream.h" +#include "jpeg2000.h" +#include "jpeg2000dsp.h" + +#define JP2_SIG_TYPE 0x6A502020 +#define JP2_SIG_VALUE 0x0D0A870A +#define JP2_CODESTREAM 0x6A703263 +#define JP2_HEADER 0x6A703268 + +#define HAD_COC 0x01 +#define HAD_QCC 0x02 + +#define MAX_POCS 32 + +typedef struct Jpeg2000POCEntry { + uint16_t LYEpoc; + uint16_t CSpoc; + uint16_t CEpoc; + uint8_t RSpoc; + uint8_t REpoc; + uint8_t Ppoc; +} Jpeg2000POCEntry; + +typedef struct Jpeg2000POC { + Jpeg2000POCEntry poc[MAX_POCS]; + int nb_poc; + int is_default; +} Jpeg2000POC; + +typedef struct Jpeg2000TilePart { + uint8_t tile_index; // Tile index who refers the tile-part + const uint8_t *tp_end; + GetByteContext header_tpg; // bit stream of header if PPM header is used + GetByteContext tpg; // bit stream in tile-part +} Jpeg2000TilePart; + +/* RMK: For JPEG2000 DCINEMA 3 tile-parts in a tile + * one per component, so tile_part elements have a size of 3 */ +typedef struct Jpeg2000Tile { + Jpeg2000Component *comp; + uint8_t properties[4]; + Jpeg2000CodingStyle codsty[4]; + Jpeg2000QuantStyle qntsty[4]; + Jpeg2000POC poc; + Jpeg2000TilePart tile_part[32]; + uint8_t has_ppt; // whether this tile has a ppt marker + uint8_t *packed_headers; // contains packed headers. Used only along with PPT marker + int packed_headers_size; // size in bytes of the packed headers + GetByteContext packed_headers_stream; // byte context corresponding to packed headers + uint16_t tp_idx; // Tile-part index + int coord[2][2]; // border coordinates {{x0, x1}, {y0, y1}} +} Jpeg2000Tile; + +typedef struct Jpeg2000DecoderContext { + AVClass *class; + AVCodecContext *avctx; + GetByteContext g; + + int width, height; + int image_offset_x, image_offset_y; + int tile_offset_x, tile_offset_y; + uint8_t cbps[4]; // bits per sample in particular components + uint8_t sgnd[4]; // if a component is signed + uint8_t properties[4]; + + uint8_t has_ppm; + uint8_t *packed_headers; // contains packed headers. Used only along with PPM marker + int packed_headers_size; + GetByteContext packed_headers_stream; + uint8_t in_tile_headers; + + int cdx[4], cdy[4]; + int precision; + int ncomponents; + int colour_space; + uint32_t palette[256]; + int8_t pal8; + int cdef[4]; + int tile_width, tile_height; + unsigned numXtiles, numYtiles; + int maxtilelen; + AVRational sar; + + Jpeg2000CodingStyle codsty[4]; + Jpeg2000QuantStyle qntsty[4]; + Jpeg2000POC poc; + uint8_t roi_shift[4]; + + int bit_index; + + int curtileno; + + Jpeg2000Tile *tile; + Jpeg2000DSPContext dsp; + + /*options parameters*/ + int reduction_factor; +} Jpeg2000DecoderContext; + +#endif //AVCODEC_JPEG2000DEC_H From patchwork Thu Dec 15 19:00:33 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Caleb Etemesi X-Patchwork-Id: 39715 Delivered-To: ffmpegpatchwork2@gmail.com Received: by 2002:a05:6a20:bc95:b0:ad:ade2:bfd2 with SMTP id fx21csp853832pzb; Thu, 15 Dec 2022 11:00:51 -0800 (PST) X-Google-Smtp-Source: AA0mqf7OttgwsQWWiC0cWmQfda/I8ZRX+hPVrxHuJrkeNlf+n6JhkU+him1cCORIZxg2GrjnPRiT X-Received: by 2002:a17:906:2802:b0:7c0:b3a3:9b70 with SMTP id r2-20020a170906280200b007c0b3a39b70mr26179108ejc.62.1671130850918; Thu, 15 Dec 2022 11:00:50 -0800 (PST) ARC-Seal: i=1; a=rsa-sha256; t=1671130850; cv=none; d=google.com; s=arc-20160816; b=yLZKlDFj9dEJkW2CxVIGDVQArhnZRhdVyNeMayYKXIgP4Bpb8UGD2b9jOJFCSswpVV iLx6Sl4pwuLMGDd3exRFzi0IN8/6/7YHj3ZcJWj7M7k7dkmhbQfN1ELnqF4FnUJ9GaSn LZmohbzHI4wJ6hEjdTwK618Olae/2dwqp1PWZg8JToZGuZtIeleHoWYRmdaVpzIC1dlT rxkGDm2unwtfXrv2xyyt5w9CCjaB2m8XLJZfBoBQM1B6V1JE18q5VkrH2W7l1FrHJLMB U3gh1mXNcgrMZcVCWjjzUeXwczg6yrRc741/lePfK3cTgi0aiRGM1Gb1jlQpLYrv020A 5KAQ== ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=arc-20160816; h=sender:errors-to:content-transfer-encoding:cc:reply-to :list-subscribe:list-help:list-post:list-archive:list-unsubscribe :list-id:precedence:subject:mime-version:message-id:date:to:from :dkim-signature:delivered-to; bh=aLAFS9YGIuD1gdjOPXfq9SL5xRZyG+8RR8B3cGQ5zSY=; b=pY/+bAOFJrKLQ5Ihao3OEJVnFOIFQpankN7kqdgbiC96k4Ijv/66Lla5BztmtyHRPD i/KFmyndubXqgrGan4+o2SBOPOdjTYPkdECw27sZX5/lwxOtQvtEM9nAkzwtqY7jpvMI wOKJjxpGja87xuCjJXZSffaRY2nnCAyY5Xb4mN2eWD/uzsaIQbpB1bd+iiuhnIQFKMw7 ATNhv5IGwBz1eQtM3O/ajItQFhIU6g/eMmPVcZytNcKLMtRy+ENlAVDRMkSVR2E/Xy1q i/wp56Oybp2lE6xZnBAglCpnqB49WXWTIWxhpdK0dvcBOuzEYAM+jYPaTW5GCVZTijeO 9wKQ== ARC-Authentication-Results: i=1; mx.google.com; dkim=neutral (body hash did not verify) header.i=@gmail.com header.s=20210112 header.b=RdeNHj7Z; spf=pass (google.com: domain of ffmpeg-devel-bounces@ffmpeg.org designates 79.124.17.100 as permitted sender) smtp.mailfrom=ffmpeg-devel-bounces@ffmpeg.org; dmarc=fail (p=NONE sp=QUARANTINE dis=NONE) header.from=gmail.com Return-Path: Received: from ffbox0-bg.mplayerhq.hu (ffbox0-bg.ffmpeg.org. 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X-BeenThere: ffmpeg-devel@ffmpeg.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: FFmpeg development discussions and patches List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Reply-To: FFmpeg development discussions and patches Cc: caleb , pal@sandflow.com, git@haerdin.se Errors-To: ffmpeg-devel-bounces@ffmpeg.org Sender: "ffmpeg-devel" X-TUID: uI6cY7ooTa3k From: caleb This is a revised patch with suggested changes from earlier and satisfies the Google Summer of Code 2022 FFmpeg project to add a HTJ2K decoder to FFmpeg. --- libavcodec/Makefile | 2 +- libavcodec/jpeg2000.h | 3 + libavcodec/jpeg2000dec.c | 69 +- libavcodec/jpeg2000dec.h | 2 + libavcodec/jpeg2000htdec.c | 1441 ++++++++++++++++++++++++++++++++++++ libavcodec/jpeg2000htdec.h | 28 + 6 files changed, 1529 insertions(+), 16 deletions(-) create mode 100644 libavcodec/jpeg2000htdec.c create mode 100644 libavcodec/jpeg2000htdec.h diff --git a/libavcodec/Makefile b/libavcodec/Makefile index 98841ed07c..1ba9e09528 100644 --- a/libavcodec/Makefile +++ b/libavcodec/Makefile @@ -464,7 +464,7 @@ OBJS-$(CONFIG_JACOSUB_DECODER) += jacosubdec.o ass.o OBJS-$(CONFIG_JPEG2000_ENCODER) += j2kenc.o mqcenc.o mqc.o jpeg2000.o \ jpeg2000dwt.o OBJS-$(CONFIG_JPEG2000_DECODER) += jpeg2000dec.o jpeg2000.o jpeg2000dsp.o \ - jpeg2000dwt.o mqcdec.o mqc.o + jpeg2000dwt.o mqcdec.o mqc.o jpeg2000htdec.o OBJS-$(CONFIG_JPEGLS_DECODER) += jpeglsdec.o jpegls.o OBJS-$(CONFIG_JPEGLS_ENCODER) += jpeglsenc.o jpegls.o OBJS-$(CONFIG_JV_DECODER) += jvdec.o diff --git a/libavcodec/jpeg2000.h b/libavcodec/jpeg2000.h index e5ecb4cbf9..b2a8e13244 100644 --- a/libavcodec/jpeg2000.h +++ b/libavcodec/jpeg2000.h @@ -189,6 +189,9 @@ typedef struct Jpeg2000Cblk { Jpeg2000Pass *passes; Jpeg2000Layer *layers; int coord[2][2]; // border coordinates {{x0, x1}, {y0, y1}} + /*HTJ2K settings */ + int zbp; + int pass_lengths[2]; } Jpeg2000Cblk; // code block typedef struct Jpeg2000Prec { diff --git a/libavcodec/jpeg2000dec.c b/libavcodec/jpeg2000dec.c index 7fc09cb558..5c92baa88e 100644 --- a/libavcodec/jpeg2000dec.c +++ b/libavcodec/jpeg2000dec.c @@ -43,6 +43,7 @@ #include "jpeg2000dsp.h" #include "profiles.h" #include "jpeg2000dec.h" +#include "jpeg2000htdec.h" /* get_bits functions for JPEG2000 packet bitstream * It is a get_bit function with a bit-stuffing routine. If the value of the @@ -428,12 +429,13 @@ static int get_cox(Jpeg2000DecoderContext *s, Jpeg2000CodingStyle *c) c->cblk_style = bytestream2_get_byteu(&s->g); if (c->cblk_style != 0) { // cblk style if (c->cblk_style & JPEG2000_CTSY_HTJ2K_M || c->cblk_style & JPEG2000_CTSY_HTJ2K_F) { - av_log(s->avctx, AV_LOG_ERROR, "Support for High throughput JPEG 2000 is not yet available\n"); - return AVERROR_PATCHWELCOME; + av_log(s->avctx,AV_LOG_TRACE,"High Throughput jpeg 2000 codestream.\n"); + s->is_htj2k = 1; + } else { + av_log(s->avctx, AV_LOG_WARNING, "extra cblk styles %X\n", c->cblk_style); + if (c->cblk_style & JPEG2000_CBLK_BYPASS) + av_log(s->avctx, AV_LOG_WARNING, "Selective arithmetic coding bypass\n"); } - av_log(s->avctx, AV_LOG_WARNING, "extra cblk styles %X\n", c->cblk_style); - if (c->cblk_style & JPEG2000_CBLK_BYPASS) - av_log(s->avctx, AV_LOG_WARNING, "Selective arithmetic coding bypass\n"); } c->transform = bytestream2_get_byteu(&s->g); // DWT transformation type /* set integer 9/7 DWT in case of BITEXACT flag */ @@ -1058,13 +1060,15 @@ static int jpeg2000_decode_packet(Jpeg2000DecoderContext *s, Jpeg2000Tile *tile, return incl; if (!cblk->npasses) { - int v = expn[bandno] + numgbits - 1 - - tag_tree_decode(s, prec->zerobits + cblkno, 100); + int zbp = tag_tree_decode(s,prec->zerobits + cblkno, 100); + int v = expn[bandno] + numgbits - 1 - zbp; + if (v < 0 || v > 30) { av_log(s->avctx, AV_LOG_ERROR, "nonzerobits %d invalid or unsupported\n", v); return AVERROR_INVALIDDATA; } + cblk->zbp = zbp; cblk->nonzerobits = v; } if ((newpasses = getnpasses(s)) < 0) @@ -1105,8 +1109,29 @@ static int jpeg2000_decode_packet(Jpeg2000DecoderContext *s, Jpeg2000Tile *tile, } } - if ((ret = get_bits(s, av_log2(newpasses1) + cblk->lblock)) < 0) - return ret; + if (newpasses > 1 && s->is_htj2k) { + // Retrieve pass lengths for each pass + int href_passes = (cblk->npasses + newpasses - 1) % 3; + int segment_passes = newpasses - href_passes; + int pass_bound = 2; + int eb = 0; + int extra_bit = newpasses > 2 ? 1 : 0; + while (pass_bound <=segment_passes) { + eb++; + pass_bound +=pass_bound; + } + if ((ret = get_bits(s, llen + eb + 3)) < 0) + return ret; + cblk->pass_lengths[0] = ret; + if ((ret = get_bits(s, llen + 3 + extra_bit)) < 0) + return ret; + cblk->pass_lengths[1] = ret; + ret = cblk->pass_lengths[0] + cblk->pass_lengths[1]; + } else { + if ((ret = get_bits(s, av_log2(newpasses1) + cblk->lblock)) < 0) + return ret; + cblk->pass_lengths[0]=ret; + } if (ret > cblk->data_allocated) { size_t new_size = FFMAX(2*cblk->data_allocated, ret); void *new = av_realloc(cblk->data, new_size); @@ -1857,7 +1882,10 @@ static inline void tile_codeblocks(const Jpeg2000DecoderContext *s, Jpeg2000Tile for (compno = 0; compno < s->ncomponents; compno++) { Jpeg2000Component *comp = tile->comp + compno; Jpeg2000CodingStyle *codsty = tile->codsty + compno; + Jpeg2000QuantStyle *quantsty= tile->qntsty + compno; + int coded = 0; + int subbandno = 0; t1.stride = (1<log2_cblk_width) + 2; @@ -1865,7 +1893,7 @@ static inline void tile_codeblocks(const Jpeg2000DecoderContext *s, Jpeg2000Tile for (reslevelno = 0; reslevelno < codsty->nreslevels2decode; reslevelno++) { Jpeg2000ResLevel *rlevel = comp->reslevel + reslevelno; /* Loop on bands */ - for (bandno = 0; bandno < rlevel->nbands; bandno++) { + for (bandno = 0; bandno < rlevel->nbands; bandno++, subbandno++) { int nb_precincts, precno; Jpeg2000Band *band = rlevel->band + bandno; int cblkno = 0, bandpos; @@ -1885,12 +1913,23 @@ static inline void tile_codeblocks(const Jpeg2000DecoderContext *s, Jpeg2000Tile for (cblkno = 0; cblkno < prec->nb_codeblocks_width * prec->nb_codeblocks_height; cblkno++) { - int x, y; + int x, y, ret; + // Annex E (Equation E-2) ISO/IEC 15444-1:2019 + int magp = quantsty->expn[subbandno] + quantsty->nguardbits - 1; + Jpeg2000Cblk *cblk = prec->cblk + cblkno; - int ret = decode_cblk(s, codsty, &t1, cblk, - cblk->coord[0][1] - cblk->coord[0][0], - cblk->coord[1][1] - cblk->coord[1][0], - bandpos, comp->roi_shift); + + if (s->is_htj2k) + ret = ff_jpeg2000_decode_htj2k(s, codsty, &t1, cblk, + cblk->coord[0][1] - cblk->coord[0][0], + cblk->coord[1][1] - cblk->coord[1][0], + magp, comp->roi_shift); + else + ret = decode_cblk(s, codsty, &t1, cblk, + cblk->coord[0][1] - cblk->coord[0][0], + cblk->coord[1][1] - cblk->coord[1][0], + bandpos, comp->roi_shift); + if (ret) coded = 1; else diff --git a/libavcodec/jpeg2000dec.h b/libavcodec/jpeg2000dec.h index b6410c1432..9728529026 100644 --- a/libavcodec/jpeg2000dec.h +++ b/libavcodec/jpeg2000dec.h @@ -121,6 +121,8 @@ typedef struct Jpeg2000DecoderContext { /*options parameters*/ int reduction_factor; + /*HTJ2K params*/ + uint8_t is_htj2k; } Jpeg2000DecoderContext; #endif //AVCODEC_JPEG2000DEC_H diff --git a/libavcodec/jpeg2000htdec.c b/libavcodec/jpeg2000htdec.c new file mode 100644 index 0000000000..8ea901855f --- /dev/null +++ b/libavcodec/jpeg2000htdec.c @@ -0,0 +1,1441 @@ +/* + * Copyright (c) 2022 Caleb Etemesi + * + * This file is part of FFmpeg. + * + * FFmpeg is free software; you can redistribute it and/or + * modify it under the terms of the GNU Lesser General Public + * License as published by the Free Software Foundation; either + * version 2.1 of the License, or (at your option) any later version. + * + * FFmpeg is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + * Lesser General Public License for more details. + * + * You should have received a copy of the GNU Lesser General Public + * License along with FFmpeg; if not, write to the Free Software + * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA + */ +#include "jpeg2000htdec.h" +#include "jpeg2000.h" +#include "jpeg2000dec.h" +#include +#include +#include +#include + +#define J2K_Q1 0 + +#define J2K_Q2 1 + +#define HT_SHIFT_SIGMA 0 +#define HT_SHIFT_SCAN 4 +#define HT_SHIFT_REF 3 +#define HT_SHIFT_REF_IND 2 +/** + * @brief Table 2 in clause 7.3.3 + */ +const static uint8_t MEL_E[13] = {0, 0, 0, 1, 1, 1, 2, 2, 2, 3, 3, 4, 5}; +// Decode tables, found at the end of this +static const uint16_t dec_CxtVLC_table1[1024]; +static const uint16_t dec_CxtVLC_table0[1024]; + +typedef struct StateVars { + int32_t pos; + uint32_t bits; + uint32_t tmp; + uint32_t last; + uint8_t bits_left; + uint64_t bit_buf; +} StateVars; + +typedef struct MelDecoderState { + uint8_t k; + uint8_t run; + uint8_t one; +} MelDecoderState; + +/** + * Given a precomputed c, checks whether n % d == 0 + * + * precomputed c for d is created by the precompute_c function + */ +static av_always_inline uint32_t is_divisible(uint32_t n, uint64_t c) +{ + return n * c <= c - 1; +} +/** + * Precompute a number c given d that when combined with a dividend n + * returns whether n % d == 0 + * + * Combined with is_divisible function + */ +static av_always_inline uint64_t precompute_c(uint32_t divisor) +{ + + return 1 + (0xfffffffffffffffful / divisor); +} +/* Initializers */ + +static void jpeg2000_init_zero(StateVars *s) +{ + s->bits_left = 0; + s->bit_buf = 0; + s->tmp = 0; + s->bits = 0; + s->pos = 0; + s->last = 0; +} + +static void jpeg2000_init_mel(StateVars *s, uint32_t Pcup) +{ + jpeg2000_init_zero(s); + s->pos = Pcup; +} + +static void jpeg2000_init_mag_ref(StateVars *s, uint32_t Lref) +{ + s->pos = Lref - 2; + s->bits = 0; + s->last = 0xFF; + s->tmp = 0; + s->bits_left = 0; + s->bit_buf = 0; +} + +static void jpeg2000_init_mel_decoder(MelDecoderState *mel_state) +{ + mel_state->k = 0; + mel_state->run = 0; + mel_state->one = 0; +} + +/** + * @brief Refill the buffer backwards in little Endian while skipping + * over stuffing bits + * + * Stuffing bits are those that appear in the position of any byte whose + * LSBs are all 1's if the last consumed byte was larger than 0x8F + */ +static int jpeg2000_bitbuf_refill_backwards(StateVars *buffer, + const uint8_t *array) +{ + uint64_t tmp = 0; + int32_t position = buffer->pos; + uint32_t new_bits = 32; + uint32_t mask; + + if (buffer->bits_left > 32) + return 0; // enough data, no need to pull in more bits + + /* + * We are reading bits from end to start, and we need to handle them in LE. + * therefore, if we read bytes ABCD, we need to convert + * them to DCBA, but the bitstream is constructed in such a way that it is + * BE when reading from back to front,so we need to swap bytes + * but this doesn't work when position is less than 3, + * we end up reading bits from the MEL byte-stream which + * is a recipe for sleepless nights. + * + * So the trick is to branchlessly read and mask + * depending on whatever was the initial position, + * the mask is simply either 32 bits, 24 bits ,8 bits or 0 bits. + * depending on how many bytes are available, with this, we don't + * read past the end of the buffer,we mask + * bits we already read ensuring we don't read twice. + * and we can do it branchlessly without checking for positions. + * + * We need to watch out for negative shift values which are UB in C hence + * the MAX declarative. + */ + + position -= 4; + mask = (UINT64_C(1) << (FFMIN(4, buffer->pos + 1)) * 8) - 1; + tmp = array[position + 1] * (1ull << 24); + tmp |= array[position + 2] << 16; + tmp |= array[position + 3] << 8; + tmp |= array[position + 4]; + tmp &= mask; + + // Branchlessly unstuff bits + + // load temporary byte, which preceeds the position we + // currently at, to ensure that we can also un-stuff if the + // stuffed bit is the bottom most bits + tmp <<= 8; + tmp |= array[buffer->pos + 1]; + + if ((tmp & 0x7FFF000000) > 0x7F8F000000) { + tmp &= 0x7FFFFFFFFF; + new_bits--; + } + if ((tmp & 0x007FFF0000) > 0x007F8F0000) { + tmp = (tmp & 0x007FFFFFFF) + ((tmp & 0xFF00000000) >> 1); + new_bits--; + } + if ((tmp & 0x00007FFF00) > 0x00007F8F00) { + tmp = (tmp & 0x00007FFFFF) + ((tmp & 0xFFFF000000) >> 1); + new_bits--; + } + if ((tmp & 0x0000007FFF) > 0x0000007F8F) { + tmp = (tmp & 0x0000007FFF) + ((tmp & 0xFFFFFF0000) >> 1); + new_bits--; + } + /* remove temporary byte loaded. */ + tmp >>= 8; + + /* Add bits to the MSB of the bit buffer */ + buffer->bit_buf |= tmp << buffer->bits_left; + buffer->bits_left += new_bits; + buffer->pos = FFMAX(0, position); + return 0; +} + +/** + * @brief Refill the bit-buffer reading new bits going forward + * in the stream while skipping over stuffed bits. + */ +static void jpeg2000_bitbuf_refill_forward(StateVars *buffer, + const uint8_t *array, + uint32_t length) +{ + while (buffer->bits_left < 32) { + buffer->tmp = 0xFF; + buffer->bits = (buffer->last == 0xFF) ? 7 : 8; + if (buffer->pos <= length) { + buffer->tmp = array[buffer->pos]; + buffer->pos += 1; + buffer->last = buffer->tmp; + } + buffer->bit_buf |= ((uint64_t) buffer->tmp) << buffer->bits_left; + buffer->bits_left += buffer->bits; + } +} + +/** + * @brief Drops bits from lower bits in the bit buffer + * + * @param buf: Struct containing bit buffers + * @param nbits: Number of bits to remove. + */ +static av_always_inline void jpeg2000_bitbuf_drop_bits_lsb(StateVars *buf, + uint8_t nbits) +{ + if (buf->bits_left < nbits) { + av_log(NULL, AV_LOG_ERROR, "Invalid bit read of %d, bits in buffer are %d\n", nbits, buf->bits_left); + av_assert0(0); + } + buf->bit_buf >>= nbits; + buf->bits_left -= nbits; +} + +/** + * @brief Get bits from the bit buffer reading them + * from the least significant bits moving to the most significant bits. + * + * In case there are fewer bits, refill from `buf` moving backwards. + */ +static av_always_inline uint64_t jpeg2000_bitbuf_get_bits_lsb( + StateVars *bit_stream, uint8_t nbits, const uint8_t *buf) +{ + uint64_t bits; + uint64_t mask = (1ull << nbits) - 1; + if (bit_stream->bits_left < nbits) + jpeg2000_bitbuf_refill_backwards(bit_stream, buf); + bits = bit_stream->bit_buf & mask; + jpeg2000_bitbuf_drop_bits_lsb(bit_stream, nbits); + return bits; +} + +/** + * @brief Get bits from the bit buffer reading them + * from the least significant bits moving to the most significant bits + * + * In case there are fewer bits, refill from `buf` moving forward + */ +static av_always_inline uint64_t jpeg2000_bitbuf_get_bits_lsb_forward( + StateVars *bit_stream, uint8_t nbits, const uint8_t *buf, uint32_t length) +{ + uint64_t bits; + uint64_t mask = (1ull << nbits) - 1; + + if (bit_stream->bits_left <= nbits) + jpeg2000_bitbuf_refill_forward(bit_stream, buf, length); + bits = bit_stream->bit_buf & mask; + jpeg2000_bitbuf_drop_bits_lsb(bit_stream, nbits); + return bits; +} + +/** + * @brief Look ahead bit buffer without discarding bits + */ +static av_always_inline uint64_t jpeg2000_bitbuf_peek_bits_lsb(StateVars *stream, uint8_t nbits) +{ + uint64_t mask = (1ull << nbits) - 1; + return stream->bit_buf & mask; +} + +/** + * Variable Length Decoding Routines + */ +static void jpeg2000_init_vlc(StateVars *s, uint32_t Lcup, uint32_t Pcup, const uint8_t *Dcup) +{ + s->bits_left = 0; + s->bit_buf = 0; + s->pos = Lcup - 2 - Pcup; + s->last = Dcup[Lcup - 2]; + s->tmp = (s->last) >> 4; + s->bits = ((s->tmp & 7) < 7) ? 4 : 3; + + jpeg2000_bitbuf_refill_backwards(s, Dcup + Pcup); + jpeg2000_bitbuf_drop_bits_lsb(s, 4); +} + +/** + * Decode prefix codes for VLC segment. + */ +static int av_always_inline jpeg2000_decode_ctx_vlc(const Jpeg2000DecoderContext *s, + StateVars *vlc_stream, + const uint16_t *table, + const uint8_t *Dcup, + uint8_t *sig_pat, + uint8_t *res_off, + uint8_t *emb_pat_k, + uint8_t *emb_pat_1, + uint8_t pos, + uint32_t Pcup, + uint16_t context) +{ + /* Described in clause 7.3.5 */ + uint32_t value; + uint8_t len; + uint64_t index; + uint64_t code_word; + + jpeg2000_bitbuf_refill_backwards(vlc_stream, Dcup + Pcup); + + code_word = vlc_stream->bit_buf & 0x7f; + index = code_word + (context << 7); + + /* decode table has 1024 entries so ensure array access is in bounds */ + av_assert0(index < 1024); + + value = table[index]; + + len = (value & 0x000F) >> 1; + + res_off[pos] = (uint8_t) (value & 1); + sig_pat[pos] = (uint8_t) ((value & 0x00F0) >> 4); + emb_pat_k[pos] = (uint8_t) ((value & 0x0F00) >> 8); + emb_pat_1[pos] = (uint8_t) ((value & 0xF000) >> 12); + + jpeg2000_bitbuf_drop_bits_lsb(vlc_stream, len); + return 0; +} + +/** + * @brief Decode variable length u-vlc prefix + */ +static av_always_inline uint8_t +vlc_decode_u_prefix(StateVars *vlc_stream, const uint8_t *refill_array) +{ + /* clause 7.3.6 + * procedure : decodeUPrefix. + */ + static const uint8_t return_value[8] = {5, 1, 2, 1, 3, 1, 2, 1}; + static const uint8_t drop_bits[8] = {3, 1, 2, 1, 3, 1, 2, 1}; + + uint8_t bits; + + if (vlc_stream->bits_left < 3) + jpeg2000_bitbuf_refill_backwards(vlc_stream, refill_array); + + bits = jpeg2000_bitbuf_peek_bits_lsb(vlc_stream, 3); + + jpeg2000_bitbuf_drop_bits_lsb(vlc_stream, drop_bits[bits]); + return return_value[bits]; +} + +/** + * @brief Decode variable length u-vlc suffix + */ +static av_always_inline uint8_t vlc_decode_u_suffix( + StateVars *vlc_stream, uint8_t suffix, const uint8_t *refill_array) +{ + /* clause 7.3.6 + * procedure: decodeUSuffix + */ + static const int mask[] = {1, 31}; + static const int drop_bits[] = {1, 5}; + + uint8_t bits; + int cond = suffix != 3; + if (suffix < 3) + return 0; + + if (vlc_stream->bits_left < 5) + jpeg2000_bitbuf_refill_backwards(vlc_stream, refill_array); + + bits = jpeg2000_bitbuf_peek_bits_lsb(vlc_stream, 5); + + jpeg2000_bitbuf_drop_bits_lsb(vlc_stream, drop_bits[cond]); + return bits & mask[cond]; +} + +/** + * @brief Decode variable length u-vlc suffix + */ +static av_always_inline uint8_t vlc_decode_u_extension( + StateVars *vlc_stream, uint8_t suffix, const uint8_t *refill_array) +{ + /* clause 7.3.6 + * procedure decodeUExtension. + */ + return jpeg2000_bitbuf_get_bits_lsb(vlc_stream, 4 * (suffix >= 28), refill_array); +} + +/** + * Magnitude and Sign decode procedures + */ +static int32_t av_always_inline jpeg2000_decode_mag_sgn(StateVars *mag_sgn_stream, int32_t m_n, + int32_t i_n, const uint8_t *buf, uint32_t length) +{ + /* clause 7.3.8 + * procedure: decodeMagSgnValue + */ + int32_t val = 0; + if (m_n > 0) { + val = jpeg2000_bitbuf_get_bits_lsb_forward(mag_sgn_stream,m_n,buf,length); + val += (i_n << m_n); + } + return val; +} + +static av_always_inline void +recover_mag_sgn(StateVars *mag_sgn, uint8_t pos, uint16_t q, int32_t m_n[2], int32_t known_1[2], + const uint8_t emb_pat_1[2], + int32_t v[2][4], int32_t m[2][4], uint8_t *E, uint32_t *mu_n, const uint8_t *Dcup, uint32_t Pcup, + uint32_t pLSB) +{ + for (int i = 0; i < 4; i++) { + int32_t n = 4 * q + i; + m_n[pos] = m[pos][i]; + known_1[pos] = (emb_pat_1[pos] >> i) & 1; + v[pos][i] = jpeg2000_decode_mag_sgn(mag_sgn, m_n[pos], known_1[pos], Dcup, Pcup); + + if (m_n[pos] != 0) { + E[n] = 32 - ff_clz(v[pos][i] | 1); + mu_n[n] = (v[pos][i] >> 1) + 1; + mu_n[n] <<= pLSB; + mu_n[n] |= ((uint32_t) (v[pos][i] & 1)) << 31; // sign bit. + } + } +} + +static int jpeg2000_import_bit(StateVars *stream, const uint8_t *array, uint32_t length) +{ + int cond = stream->pos <= length; + int pos = FFMIN(stream->pos, length); + if (stream->bits == 0) { + stream->bits = (stream->tmp == 0xFF) ? 7 : 8; + stream->pos += cond; + stream->tmp = cond ? array[pos] : 0xFF; + } + stream->bits -= 1; + return (stream->tmp >> stream->bits) & 1; +} + +static int jpeg2000_peek_bit(StateVars *stream, const uint8_t *array, uint32_t length) +{ + if (stream->bits == 0) { + int cond = stream->pos <= length; + int pos = FFMIN(stream->pos, length); + stream->bits = (stream->tmp == 0xFF) ? 7 : 8; + stream->pos += cond; + stream->tmp = cond ? array[pos] : 0xFF; + } + return (stream->tmp >> stream->bits) & 1; +} + +static int jpeg2000_decode_mel_sym(MelDecoderState *mel_state, + StateVars *mel_stream, + const uint8_t *Dcup, + uint32_t Lcup) +{ + + if (mel_state->run == 0 && mel_state->one == 0) { + uint8_t eval; + uint8_t bit; + + eval = MEL_E[mel_state->k]; + bit = jpeg2000_import_bit(mel_stream, Dcup, Lcup); + if (bit == 1) { + mel_state->run = 1 << eval; + mel_state->k = FFMIN(12, mel_state->k + 1); + } else { + mel_state->run = 0; + while (eval > 0) { + bit = jpeg2000_import_bit(mel_stream, Dcup, Lcup); + mel_state->run = (2 * (mel_state->run)) + bit; + eval -= 1; + } + mel_state->k = FFMAX(0, mel_state->k - 1); + mel_state->one = 1; + } + } + if (mel_state->run > 0) { + mel_state->run -= 1; + return 0; + } else { + mel_state->one = 0; + return 1; + } +} + +/** + * @brief Magref decoding procedures + */ +static av_always_inline int jpeg2000_import_magref_bit(StateVars *stream, const uint8_t *array, uint32_t length) +{ + return jpeg2000_bitbuf_get_bits_lsb(stream, 1, array); +} + +/** + * @brief Signal EMB decode + */ +static int +jpeg2000_decode_sig_emb(const Jpeg2000DecoderContext *s, MelDecoderState *mel_state, StateVars *mel_stream, + StateVars *vlc_stream, const uint16_t *vlc_table, const uint8_t *Dcup, uint8_t *sig_pat, + uint8_t *res_off, uint8_t *emb_pat_k, uint8_t *emb_pat_1, uint8_t pos, uint16_t context, + uint32_t Lcup, uint32_t Pcup) +{ + if (context == 0) { + uint8_t sym; + sym = jpeg2000_decode_mel_sym(mel_state, mel_stream, Dcup, Lcup); + if (sym == 0) { + sig_pat[pos] = 0; + res_off[pos] = 0; + emb_pat_k[pos] = 0; + emb_pat_1[pos] = 0; + return 0; + } + } + return jpeg2000_decode_ctx_vlc(s, vlc_stream, vlc_table, Dcup, sig_pat, + res_off, emb_pat_k, emb_pat_1, pos, Pcup, + context); +} + +static av_always_inline int jpeg2000_get_state(int x1, int x2, int width, int shift_by, const uint8_t *block_states) +{ + return (block_states[(x1 + 1) * (width + 2) + (x2 + 1)] >> shift_by) & 1; +} + +static av_always_inline void jpeg2000_modify_state(int x1, int x2, int width, int value, uint8_t *block_states) +{ + block_states[(x1 + 1) * (width + 2) + (x2 + 1)] |= value; +} + +static int av_noinline +jpeg2000_decode_ht_cleanup(const Jpeg2000DecoderContext *s, Jpeg2000Cblk *cblk, Jpeg2000T1Context *t1, + MelDecoderState *mel_state, + StateVars *mel_stream, StateVars *vlc_stream, StateVars *mag_sgn_stream, const uint8_t *Dcup, + uint32_t Lcup, + uint32_t Pcup, uint8_t pLSB, int width, int height, int32_t *sample_buf, + uint8_t *block_states) +{ + uint16_t q = 0; /* Represents current quad position. */ + uint16_t q1, q2; + uint16_t context1, context2; + uint16_t context = 0; + + uint8_t sig_pat[2] = {0}; /* significance pattern*/ + uint8_t res_off[2] = {0}; /* residual offset*/ + uint8_t emb_pat_k[2] = {0}; /* Exponent Max Bound pattern K */ + uint8_t emb_pat_1[2] = {0}; /* Exponent Max Bound pattern 1.*/ + uint8_t gamma[2] = {0}; + + uint8_t E_n[2] = {0}; + uint8_t E_ne[2] = {0}; + uint8_t E_nw[2] = {0}; + uint8_t E_nf[2] = {0}; + + uint8_t max_e[2] = {0}; + uint8_t u_pfx[2] = {0}; + uint8_t u_sfx[2] = {0}; + uint8_t u_ext[2] = {0}; + + int32_t u[2] = {0}; + int32_t U[2] = {0}; /* Exponent bound (7.3.7) */ + int32_t m_n[2] = {0}; + int32_t known_1[2] = {0}; + + int32_t m[2][4] = {0}; + int32_t v[2][4] = {0}; + + uint8_t kappa[2] = {1, 1}; + int ret = 0; + + int sp; + + uint64_t c; + + uint8_t *sigma; + uint32_t *mu; + + const uint8_t *vlc_buf = Dcup + Pcup; + /* convert to raster-scan */ + const uint16_t is_border_x = width % 2; + const uint16_t is_border_y = height % 2; + + int j1, j2; + int x1 = 0, x2 = 0, x3 = 0; + + const uint16_t quad_width = ff_jpeg2000_ceildivpow2(width, 1); + const uint16_t quad_height = ff_jpeg2000_ceildivpow2(height, 1); + + size_t buf_size = 4 * quad_width * quad_height; + + uint8_t *sigma_n = av_calloc(buf_size, sizeof(uint8_t)); + uint8_t *E = av_calloc(buf_size, sizeof(uint8_t)); + uint32_t *mu_n = av_calloc(buf_size, sizeof(uint32_t)); + + if (!sigma_n || !E || !mu_n) { + ret = AVERROR(ENOMEM); + goto free; + } + + sigma = sigma_n; + mu = mu_n; + + while (q < quad_width - 1) { + q1 = q; + q2 = q1 + 1; + + if ((ret = jpeg2000_decode_sig_emb(s, mel_state, mel_stream, vlc_stream, + dec_CxtVLC_table0, Dcup, sig_pat, res_off, + emb_pat_k, emb_pat_1, J2K_Q1, context, Lcup, + Pcup)) < 0) + goto free; + for (int i = 0; i < 4; i++) + sigma_n[4 * q1 + i] = (sig_pat[J2K_Q1] >> i) & 1; + + // calculate context + context = sigma_n[4 * q1]; // f + context |= sigma_n[4 * q1 + 1]; // sf + context += sigma_n[4 * q1 + 2] << 1; // w << 1 + context += sigma_n[4 * q1 + 3] << 2; + + if ((ret = jpeg2000_decode_sig_emb(s, mel_state, mel_stream, vlc_stream, + dec_CxtVLC_table0, Dcup, sig_pat, res_off, + emb_pat_k, emb_pat_1, J2K_Q2, context, Lcup, + Pcup)) < 0) + goto free; + + for (int i = 0; i < 4; i++) + sigma_n[4 * q2 + i] = (sig_pat[J2K_Q2] >> i) & 1; + + // calculate context for the next quad + context = sigma_n[4 * q2]; // f + context |= sigma_n[4 * q2 + 1]; // sf + context += sigma_n[4 * q2 + 2] << 1; // w << 1 + context += sigma_n[4 * q2 + 3] << 2; // sw << 2 + + u[0] = 0; + u[1] = 0; + + jpeg2000_bitbuf_refill_backwards(vlc_stream, vlc_buf); + + if (res_off[J2K_Q1] == 1 && res_off[J2K_Q2] == 1) { + + if (jpeg2000_decode_mel_sym(mel_state, mel_stream, Dcup, Lcup) == 1) { + + u_pfx[J2K_Q1] = vlc_decode_u_prefix(vlc_stream, vlc_buf); + u_pfx[J2K_Q2] = vlc_decode_u_prefix(vlc_stream, vlc_buf); + + u_sfx[J2K_Q1] = vlc_decode_u_suffix(vlc_stream, u_pfx[J2K_Q1], vlc_buf); + u_sfx[J2K_Q2] = vlc_decode_u_suffix(vlc_stream, u_pfx[J2K_Q2], vlc_buf); + + u_ext[J2K_Q1] = vlc_decode_u_extension(vlc_stream, u_sfx[J2K_Q1], vlc_buf); + u_ext[J2K_Q2] = vlc_decode_u_extension(vlc_stream, u_sfx[J2K_Q2], vlc_buf); + + u[J2K_Q1] = 2 + u_pfx[J2K_Q1] + u_sfx[J2K_Q1] + (u_ext[J2K_Q1] * 4); + u[J2K_Q2] = 2 + u_pfx[J2K_Q2] + u_sfx[J2K_Q2] + (u_ext[J2K_Q2] * 4); + + } else { + u_pfx[J2K_Q1] = vlc_decode_u_prefix(vlc_stream, vlc_buf); + + if (u_pfx[J2K_Q1] > 2) { + u[J2K_Q2] = jpeg2000_bitbuf_get_bits_lsb(vlc_stream, 1, vlc_buf) + 1; + u_sfx[J2K_Q1] = vlc_decode_u_suffix(vlc_stream, u_pfx[J2K_Q1], vlc_buf); + u_ext[J2K_Q1] = vlc_decode_u_extension(vlc_stream, u_sfx[J2K_Q1], vlc_buf); + } else { + u_pfx[J2K_Q2] = vlc_decode_u_prefix(vlc_stream, vlc_buf); + u_sfx[J2K_Q1] = vlc_decode_u_suffix(vlc_stream, u_pfx[J2K_Q1], vlc_buf); + u_sfx[J2K_Q2] = vlc_decode_u_suffix(vlc_stream, u_pfx[J2K_Q2], vlc_buf); + u_ext[J2K_Q1] = vlc_decode_u_extension(vlc_stream, u_sfx[J2K_Q1], vlc_buf); + u_ext[J2K_Q2] = vlc_decode_u_extension(vlc_stream, u_sfx[J2K_Q2], vlc_buf); + u[J2K_Q2] = u_pfx[J2K_Q2] + u_sfx[J2K_Q2] + (u_ext[J2K_Q2] * 4); + } + // clause 7.3.6 (3) + u[J2K_Q1] = u_pfx[J2K_Q1] + u_sfx[J2K_Q1] + (u_ext[J2K_Q1] * 4); + } + + } else if (res_off[J2K_Q1] == 1 || res_off[J2K_Q2] == 1) { + uint8_t pos = res_off[J2K_Q1] == 1 ? 0 : 1; + u_pfx[pos] = vlc_decode_u_prefix(vlc_stream, vlc_buf); + u_sfx[pos] = vlc_decode_u_suffix(vlc_stream, u_pfx[pos], vlc_buf); + u_ext[pos] = vlc_decode_u_extension(vlc_stream, u_sfx[pos], vlc_buf); + u[pos] = u_pfx[pos] + u_sfx[pos] + (u_ext[pos] * 4); + } + U[J2K_Q1] = kappa[J2K_Q1] + u[J2K_Q1]; + U[J2K_Q2] = kappa[J2K_Q2] + u[J2K_Q2]; + + for (int i = 0; i < 4; i++) { + m[J2K_Q1][i] = sigma_n[4 * q1 + i] * U[J2K_Q1] - ((emb_pat_k[J2K_Q1] >> i) & 1); + m[J2K_Q2][i] = sigma_n[4 * q2 + i] * U[J2K_Q2] - ((emb_pat_k[J2K_Q2] >> i) & 1); + } + + recover_mag_sgn(mag_sgn_stream, J2K_Q1, q1, m_n, known_1, emb_pat_1, v, m, + E, mu_n, Dcup, Pcup, pLSB); + + recover_mag_sgn(mag_sgn_stream, J2K_Q2, q2, m_n, known_1, emb_pat_1, v, m, + E, mu_n, Dcup, Pcup, pLSB); + + // prepare context for the next quad + + // move to the next quad pair + q += 2; + } + if (quad_width % 2 == 1) { + q1 = q; + + if ((ret = jpeg2000_decode_sig_emb(s, mel_state, mel_stream, vlc_stream, + dec_CxtVLC_table0, Dcup, sig_pat, res_off, + emb_pat_k, emb_pat_1, J2K_Q1, context, Lcup, + Pcup)) < 0) + goto free; + + for (int i = 0; i < 4; i++) + sigma_n[4 * q1 + i] = (sig_pat[J2K_Q1] >> i) & 1; + + u[J2K_Q1] = 0; + + if (res_off[J2K_Q1] == 1) { + u_pfx[J2K_Q1] = vlc_decode_u_prefix(vlc_stream, vlc_buf); + u_sfx[J2K_Q1] = vlc_decode_u_suffix(vlc_stream, u_pfx[J2K_Q1], vlc_buf); + u_ext[J2K_Q1] = vlc_decode_u_extension(vlc_stream, u_sfx[J2K_Q1], vlc_buf); + u[J2K_Q1] = u_pfx[J2K_Q1] + u_sfx[J2K_Q1] + (u_ext[J2K_Q1] * 4); + } + + U[J2K_Q1] = kappa[J2K_Q1] + u[J2K_Q1]; + + for (int i = 0; i < 4; i++) + m[J2K_Q1][i] = sigma_n[4 * q1 + i] * U[J2K_Q1] - ((emb_pat_k[J2K_Q1] >> i) & 1); + + recover_mag_sgn(mag_sgn_stream, J2K_Q1, q1, m_n, known_1, emb_pat_1, v, m, + E, mu_n, Dcup, Pcup, pLSB); + + q++; /* move to next quad pair */ + } + /* initial line pair end. */ + /* + * As an optimization, we can replace modulo operations with + * checking if a number is divisible , since that's the only thing we need. + * this is paired with is_divisible. + * Credits to Daniel Lemire blog post: + * https://lemire.me/blog/2019/02/08/faster-remainders-when-the-divisor-is-a-constant-beating-compilers-and-libdivide/ + * It's UB on zero, but we can't have a quad being zero, the spec doesn't allow, + * so we error out early in case that's the case. + */ + c = precompute_c(quad_width); + + for (int row = 1; row < quad_height; row++) { + while ((q - (row * quad_width)) < quad_width - 1 && q < (quad_height * quad_width)) { + q1 = q; + q2 = q + 1; + context1 = sigma_n[4 * (q1 - quad_width) + 1]; + context1 += sigma_n[4 * (q1 - quad_width) + 3] << 2; // ne + + if (!is_divisible(q1, c)) { + context1 |= sigma_n[4 * (q1 - quad_width) - 1]; // nw + context1 += (sigma_n[4 * q1 - 1] | sigma_n[4 * q1 - 2]) << 1; // sw| q + } + if (!is_divisible(q1 + 1, c)) + context1 |= sigma_n[4 * (q1 - quad_width) + 5] << 2; + + if ((ret = jpeg2000_decode_sig_emb(s, mel_state, mel_stream, vlc_stream, + dec_CxtVLC_table1, Dcup, sig_pat, res_off, + emb_pat_k, emb_pat_1, J2K_Q1, context1, Lcup, + Pcup)) + < 0) + goto free; + + for (int i = 0; i < 4; i++) + sigma_n[4 * q1 + i] = (sig_pat[J2K_Q1] >> i) & 1; + + context2 = sigma_n[4 * (q2 - quad_width) + 1]; + context2 += sigma_n[4 * (q2 - quad_width) + 3] << 2; + + if (!is_divisible(q2, c)) { + context2 |= sigma_n[4 * (q2 - quad_width) - 1]; + context2 += (sigma_n[4 * q2 - 1] | sigma_n[4 * q2 - 2]) << 1; + } + if (!is_divisible(q2 + 1, c)) + context2 |= sigma_n[4 * (q2 - quad_width) + 5] << 2; + + if ((ret = jpeg2000_decode_sig_emb(s, mel_state, mel_stream, vlc_stream, + dec_CxtVLC_table1, Dcup, sig_pat, res_off, + emb_pat_k, emb_pat_1, J2K_Q2, context2, Lcup, + Pcup)) + < 0) + goto free; + + for (int i = 0; i < 4; i++) + sigma_n[4 * q2 + i] = (sig_pat[J2K_Q2] >> i) & 1; + + u[J2K_Q1] = 0; + u[J2K_Q2] = 0; + + jpeg2000_bitbuf_refill_backwards(vlc_stream, vlc_buf); + + if (res_off[J2K_Q1] == 1 && res_off[J2K_Q2] == 1) { + u_pfx[J2K_Q1] = vlc_decode_u_prefix(vlc_stream, vlc_buf); + u_pfx[J2K_Q2] = vlc_decode_u_prefix(vlc_stream, vlc_buf); + + u_sfx[J2K_Q1] = vlc_decode_u_suffix(vlc_stream, u_pfx[J2K_Q1], vlc_buf); + u_sfx[J2K_Q2] = vlc_decode_u_suffix(vlc_stream, u_pfx[J2K_Q2], vlc_buf); + + u_ext[J2K_Q1] = vlc_decode_u_extension(vlc_stream, u_sfx[J2K_Q1], vlc_buf); + u_ext[J2K_Q2] = vlc_decode_u_extension(vlc_stream, u_sfx[J2K_Q2], vlc_buf); + + u[J2K_Q1] = u_pfx[J2K_Q1] + u_sfx[J2K_Q1] + (u_ext[J2K_Q1] << 2); + u[J2K_Q2] = u_pfx[J2K_Q2] + u_sfx[J2K_Q2] + (u_ext[J2K_Q2] << 2); + + } else if (res_off[J2K_Q1] == 1 || res_off[J2K_Q2] == 1) { + uint8_t pos = res_off[J2K_Q1] == 1 ? 0 : 1; + + u_pfx[pos] = vlc_decode_u_prefix(vlc_stream, vlc_buf); + u_sfx[pos] = vlc_decode_u_suffix(vlc_stream, u_pfx[pos], vlc_buf); + u_ext[pos] = vlc_decode_u_extension(vlc_stream, u_sfx[pos], vlc_buf); + + u[pos] = u_pfx[pos] + u_sfx[pos] + (u_ext[pos] << 2); + } + sp = sig_pat[J2K_Q1]; + + gamma[J2K_Q1] = 1; + + if (sp == 0 || sp == 1 || sp == 2 || sp == 4 || sp == 8) + gamma[J2K_Q1] = 0; + + sp = sig_pat[J2K_Q2]; + + gamma[J2K_Q2] = 1; + + if (sp == 0 || sp == 1 || sp == 2 || sp == 4 || sp == 8) + gamma[J2K_Q2] = 0; + + E_n[J2K_Q1] = E[4 * (q1 - quad_width) + 1]; + E_n[J2K_Q2] = E[4 * (q2 - quad_width) + 1]; + + E_ne[J2K_Q1] = E[4 * (q1 - quad_width) + 3]; + E_ne[J2K_Q2] = E[4 * (q2 - quad_width) + 3]; + + E_nw[J2K_Q1] = (!is_divisible(q1, c)) * E[FFMAX((4 * (q1 - quad_width) - 1), 0)]; + E_nw[J2K_Q2] = (!is_divisible(q2, c)) * E[FFMAX((4 * (q2 - quad_width) - 1), 0)]; + + E_nf[J2K_Q1] = (!is_divisible(q1 + 1, c)) * E[4 * (q1 - quad_width) + 5]; + E_nf[J2K_Q2] = (!is_divisible(q2 + 1, c)) * E[4 * (q2 - quad_width) + 5]; + + max_e[J2K_Q1] = FFMAX(E_nw[J2K_Q1], FFMAX3(E_n[J2K_Q1], E_ne[J2K_Q1], E_nf[J2K_Q1])); + max_e[J2K_Q2] = FFMAX(E_nw[J2K_Q2], FFMAX3(E_n[J2K_Q2], E_ne[J2K_Q2], E_nf[J2K_Q2])); + + kappa[J2K_Q1] = FFMAX(1, gamma[J2K_Q1] * (max_e[J2K_Q1] - 1)); + kappa[J2K_Q2] = FFMAX(1, gamma[J2K_Q2] * (max_e[J2K_Q2] - 1)); + + U[J2K_Q1] = kappa[J2K_Q1] + u[J2K_Q1]; + U[J2K_Q2] = kappa[J2K_Q2] + u[J2K_Q2]; + + for (int i = 0; i < 4; i++) { + m[J2K_Q1][i] = sigma_n[4 * q1 + i] * U[J2K_Q1] - ((emb_pat_k[J2K_Q1] >> i) & 1); + m[J2K_Q2][i] = sigma_n[4 * q2 + i] * U[J2K_Q2] - ((emb_pat_k[J2K_Q2] >> i) & 1); + } + recover_mag_sgn(mag_sgn_stream, J2K_Q1, q1, m_n, known_1, emb_pat_1, v, m, + E, mu_n, Dcup, Pcup, pLSB); + + recover_mag_sgn(mag_sgn_stream, J2K_Q2, q2, m_n, known_1, emb_pat_1, v, m, + E, mu_n, Dcup, Pcup, pLSB); + + /* move to the next quad pair */ + q += 2; + } + if (quad_width % 2 == 1) { + q1 = q; + /* calculate context for current quad */ + context1 = sigma_n[4 * (q1 - quad_width) + 1]; + context1 += (sigma_n[4 * (q1 - quad_width) + 3] << 2); + + if (!is_divisible(q1, c)) { + context1 |= sigma_n[4 * (q1 - quad_width) - 1]; + context1 += (sigma_n[4 * q1 - 1] | sigma_n[4 * q1 - 2]) << 1; + } + if (!is_divisible(q1 + 1, c)) + context1 |= sigma_n[4 * (q1 - quad_width) + 5] << 2; + + if ((ret = jpeg2000_decode_sig_emb(s, mel_state, mel_stream, vlc_stream, + dec_CxtVLC_table1, Dcup, sig_pat, res_off, + emb_pat_k, emb_pat_1, J2K_Q1, context1, Lcup, + Pcup)) + < 0) + goto free; + + for (int i = 0; i < 4; i++) + sigma_n[4 * q1 + i] = (sig_pat[J2K_Q1] >> i) & 1; + + u[J2K_Q1] = 0; + + /* Recover mag_sgn value */ + if (res_off[J2K_Q1] == 1) { + u_pfx[J2K_Q1] = vlc_decode_u_prefix(vlc_stream, vlc_buf); + u_sfx[J2K_Q1] = vlc_decode_u_suffix(vlc_stream, u_pfx[J2K_Q1], vlc_buf); + u_ext[J2K_Q1] = vlc_decode_u_extension(vlc_stream, u_sfx[J2K_Q1], vlc_buf); + + u[J2K_Q1] = u_pfx[J2K_Q1] + u_sfx[J2K_Q1] + (u_ext[J2K_Q1] << 2); + } + + sp = sig_pat[J2K_Q1]; + + gamma[J2K_Q1] = 1; + + if (sp == 0 || sp == 1 || sp == 2 || sp == 4 || sp == 8) + gamma[J2K_Q1] = 0; + + E_n[J2K_Q1] = E[4 * (q1 - quad_width) + 1]; + + E_ne[J2K_Q1] = E[4 * (q1 - quad_width) + 3]; + + E_nw[J2K_Q1] = (!is_divisible(q1, c)) * E[FFMAX((4 * (q1 - quad_width) - 1), 0)]; + + E_nf[J2K_Q1] = (!is_divisible(q1 + 1, c)) * E[4 * (q1 - quad_width) + 5]; + + max_e[J2K_Q1] = FFMAX(E_nw[J2K_Q1], FFMAX3(E_n[J2K_Q1], E_ne[J2K_Q1], E_nf[J2K_Q1])); + + kappa[J2K_Q1] = FFMAX(1, gamma[J2K_Q1] * (max_e[J2K_Q1] - 1)); + + U[J2K_Q1] = kappa[J2K_Q1] + u[J2K_Q1]; + + for (int i = 0; i < 4; i++) + m[J2K_Q1][i] = sigma_n[4 * q1 + i] * U[J2K_Q1] - ((emb_pat_k[J2K_Q1] >> i) & 1); + + recover_mag_sgn(mag_sgn_stream, J2K_Q1, q1, m_n, known_1, emb_pat_1, v, m, + E, mu_n, Dcup, Pcup, pLSB); + q += 1; + } + } + // convert to raster-scan + for (int y = 0; y < quad_height; y++) { + for (int x = 0; x < quad_width; x++) { + j1 = 2 * y; + j2 = 2 * x; + + sample_buf[j2 + (j1 * width)] = (int32_t)*mu; + jpeg2000_modify_state(j1, j2, width, *sigma, block_states); + sigma += 1; + mu += 1; + + x1 = y != quad_height - 1 || is_border_y == 0; + sample_buf[j2 + ((j1 + 1) * width)] = ((int32_t)*mu) * x1; + jpeg2000_modify_state(j1 + 1, j2, width, (*sigma) * x1, block_states); + sigma += 1; + mu += 1; + + x2 = x != quad_width - 1 || is_border_x == 0; + sample_buf[(j2 + 1) + (j1 * width)] = ((int32_t)*mu) * x2; + jpeg2000_modify_state(j1, j2 + 1, width, (*sigma) * x2, block_states); + sigma += 1; + mu += 1; + + x3 = x1 | x2; + sample_buf[(j2 + 1) + (j1 + 1) * width] = ((int32_t)*mu) * x3; + jpeg2000_modify_state(j1 + 1, j2 + 1, width, (*sigma) * x3, block_states); + sigma += 1; + mu += 1; + } + } + ret = 1; +free: + av_freep(&sigma_n); + av_freep(&E); + av_freep(&mu_n); + return ret; +} + +static void +jpeg2000_calc_mbr(uint8_t *mbr, const uint16_t i, const uint16_t j, const uint32_t mbr_info, uint8_t causal_cond, + uint8_t *block_states, int width) +{ + + int local_mbr = 0; + local_mbr |= jpeg2000_get_state(i - 1, j - 1, width, HT_SHIFT_SIGMA, block_states); + local_mbr |= jpeg2000_get_state(i - 1, j + 0, width, HT_SHIFT_SIGMA, block_states); + local_mbr |= jpeg2000_get_state(i - 1, j + 1, width, HT_SHIFT_SIGMA, block_states); + + local_mbr |= jpeg2000_get_state(i + 0, j - 1, width, HT_SHIFT_SIGMA, block_states); + local_mbr |= jpeg2000_get_state(i + 0, j + 1, width, HT_SHIFT_SIGMA, block_states); + + local_mbr |= jpeg2000_get_state(i + 1, j - 1, width, HT_SHIFT_SIGMA, block_states) * causal_cond; + local_mbr |= jpeg2000_get_state(i + 1, j + 0, width, HT_SHIFT_SIGMA, block_states) * causal_cond; + local_mbr |= jpeg2000_get_state(i + 1, j + 1, width, HT_SHIFT_SIGMA, block_states) * causal_cond; + + local_mbr |= jpeg2000_get_state(i - 1, j - 1, width, HT_SHIFT_REF, block_states) * + jpeg2000_get_state(i - 1, j - 1, width, HT_SHIFT_SCAN, block_states); + local_mbr |= jpeg2000_get_state(i - 1, j + 0, width, HT_SHIFT_REF, block_states) * + jpeg2000_get_state(i - 1, j - 1, width, HT_SHIFT_SCAN, block_states); + local_mbr |= jpeg2000_get_state(i - 1, j + 1, width, HT_SHIFT_REF, block_states) * + jpeg2000_get_state(i - 1, j + 1, width, HT_SHIFT_SCAN, block_states); + + local_mbr |= jpeg2000_get_state(i + 0, j - 1, width, HT_SHIFT_REF, block_states) * + jpeg2000_get_state(i + 0, j - 1, width, HT_SHIFT_SCAN, block_states); + local_mbr |= jpeg2000_get_state(i + 0, j + 1, width, HT_SHIFT_REF, block_states) * + jpeg2000_get_state(i + 0, j + 1, width, HT_SHIFT_SCAN, block_states); + + local_mbr |= jpeg2000_get_state(i + 1, j - 1, width, HT_SHIFT_REF, block_states) * + jpeg2000_get_state(i + 1, j - 1, width, HT_SHIFT_SCAN, block_states) * causal_cond; + local_mbr |= jpeg2000_get_state(i + 1, j + 0, width, HT_SHIFT_REF, block_states) * + jpeg2000_get_state(i + 1, j + 0, width, HT_SHIFT_SCAN, block_states) * causal_cond; + local_mbr |= jpeg2000_get_state(i + 1, j + 1, width, HT_SHIFT_REF, block_states) * + jpeg2000_get_state(i + 1, j + 1, width, HT_SHIFT_SCAN, block_states) * causal_cond; + + *mbr |= local_mbr; +} + +static void +jpeg2000_process_stripes_block(StateVars *sig_prop, int i_s, int j_s, int width, int height, int stride, int pLSB, + int32_t *sample_buf, uint8_t *block_states, uint8_t *magref_segment, + uint32_t magref_length) +{ + int32_t *sp; + uint8_t causal_cond = 0; + uint8_t bit; + uint8_t mbr; + uint32_t mbr_info; + int modify_state = 0; + int cond; + + for (int j = j_s; j < j_s + width; j++) { + mbr_info = 0; + for (int i = i_s; i < i_s + height; i++) { + sp = &sample_buf[j + (i * (stride - 2))]; + mbr = 0; + causal_cond = i != (i_s + height - 1); + if (jpeg2000_get_state(i, j, stride - 2, HT_SHIFT_SIGMA, block_states) == 0) + jpeg2000_calc_mbr(&mbr, i, j, mbr_info & 0x1EF, causal_cond, block_states, stride - 2); + mbr_info >>= 3; + cond = mbr != 0; + bit = jpeg2000_peek_bit(sig_prop, magref_segment, magref_length); + *sp |= (bit * cond) << pLSB; + sig_prop->bits -= cond; + modify_state = (((1 << HT_SHIFT_REF_IND) | (1 << HT_SHIFT_REF)) * cond) | 1 << HT_SHIFT_SCAN; + jpeg2000_modify_state(i, j, stride - 2, modify_state, block_states); + } + } +} + +static void av_noinline +jpeg2000_decode_sigprop(Jpeg2000Cblk *cblk, uint16_t width, uint16_t height, uint8_t *magref_segment, + uint32_t magref_length, uint8_t pLSB, int32_t *sample_buf, uint8_t *block_states) +{ + /* Described in clause 7.4 + * procedure: decodeSigPropMag + */ + StateVars sp_dec; + const uint16_t num_v_stripe = height / 4; + const uint16_t num_h_stripe = width / 4; + int b_width = 4; + int b_height = 4; + int stride = width + 2; + int last_width; + uint16_t i = 0, j = 0; + + jpeg2000_init_zero(&sp_dec); + + for (int n1 = 0; n1 < num_v_stripe; n1++) { + j = 0; + for (int n2 = 0; n2 < num_h_stripe; n2++) { + jpeg2000_process_stripes_block(&sp_dec, i, j, b_width, b_height, stride, + pLSB, sample_buf, block_states, magref_segment, + magref_length); + j += 4; + } + last_width = width % 4; + if (last_width) + jpeg2000_process_stripes_block(&sp_dec, i, j, last_width, b_height, stride, + pLSB, sample_buf, block_states, magref_segment, + magref_length); + i += 4; + } + /* decode remaining height stripes */ + b_height = height % 4; + j = 0; + for (int n2 = 0; n2 < num_h_stripe; n2++) { + jpeg2000_process_stripes_block(&sp_dec, i, j, b_width, b_height, stride, + pLSB, sample_buf, block_states, magref_segment, + magref_length); + j += 4; + } + last_width = width % 4; + if (last_width) + jpeg2000_process_stripes_block(&sp_dec, i, j, last_width, b_height, stride, + pLSB, sample_buf, block_states, magref_segment, + magref_length); +} + +static int av_noinline +jpeg2000_decode_magref(Jpeg2000Cblk *cblk, uint16_t width, uint16_t block_height, uint8_t *magref_segment, + uint32_t magref_length, uint8_t pLSB, int32_t *sample_buf, uint8_t *block_states) +{ + /* + * Described in clause 7.5 + * procedure: decodeSigPropMag + */ + + StateVars mag_ref = {0}; + const uint16_t num_v_stripe = block_height / 4; + uint16_t height = 4; + uint16_t i_start = 0; + int32_t *sp; + + jpeg2000_init_mag_ref(&mag_ref, magref_length); + + for (int n1 = 0; n1 < num_v_stripe; n1++) { + for (int j = 0; j < width; j++) { + for (int i = i_start; i < i_start + height; i++) { + /* we move column wise, going from one quad to another + * see figure 7. + */ + sp = &sample_buf[j + i * width]; + if (jpeg2000_get_state(i, j, width, HT_SHIFT_SIGMA, block_states) != 0) { + jpeg2000_modify_state(i, j, width, 1 << HT_SHIFT_REF_IND, block_states); + *sp |= jpeg2000_import_magref_bit(&mag_ref, magref_segment, magref_length) << pLSB; + } + } + } + i_start += 4; + } + height = block_height % 4; + for (int j = 0; j < width; j++) { + for (int i = i_start; i < i_start + height; i++) { + sp = &sample_buf[j + i * width]; + if (jpeg2000_get_state(i, j, width, HT_SHIFT_SIGMA, block_states) != 0) { + jpeg2000_modify_state(i, j, width, 1 << HT_SHIFT_REF_IND, block_states); + *sp |= jpeg2000_import_magref_bit(&mag_ref, magref_segment, magref_length) << pLSB; + } + } + } + return 1; +} + + +int +ff_jpeg2000_decode_htj2k(const Jpeg2000DecoderContext *s, Jpeg2000CodingStyle *codsty, Jpeg2000T1Context *t1, Jpeg2000Cblk *cblk, + int width, int height, int magp, uint8_t roi_shift) +{ + uint8_t p0 = 0; /* Number of placeholder passes. */ + uint32_t Lcup; /* Length of HT cleanup segment. */ + uint32_t Lref; /* Length of Refinement segment. */ + uint32_t Scup; /* HT cleanup segment suffix length. */ + uint32_t Pcup; /* HT cleanup segment prefix length. */ + + uint8_t S_blk; /* Number of skipped magnitude bitplanes; */ + uint8_t pLSB; + + uint8_t *Dcup; /* Byte of an HT cleanup segment. */ + uint8_t *Dref; /* Byte of an HT refinement segment. */ + + int z_blk; /* Number of ht coding pass */ + + uint8_t empty_passes; + + StateVars mag_sgn; /* Magnitude and Sign */ + StateVars mel; /* Adaptive run-length coding */ + StateVars vlc; /* Variable Length coding */ + StateVars sig_prop; /* Significance propagation */ + + MelDecoderState mel_state; + + int ret; + + /* Temporary buffers */ + int32_t *sample_buf; + uint8_t *block_states; + + /* Post-processing */ + int32_t n, val; + + int32_t M_b = magp; + av_assert0(width <= 1024U && height <= 1024U); + av_assert0(width * height <= 4096); + av_assert0(width * height > 0); + + memset(t1->data, 0, t1->stride * height * sizeof(*t1->data)); + memset(t1->flags, 0, t1->stride * (height + 2) * sizeof(*t1->flags)); + + if (cblk->npasses == 0) + return 0; + + if (cblk->npasses > 3) + p0 = 0; + else if (cblk->length == 0) + p0 = 1; + + empty_passes = p0 * 3; + z_blk = cblk->npasses - empty_passes; + + if (z_blk <= 0) + /* no passes within this set, continue */ + return 0; + + Lcup = cblk->pass_lengths[0]; + Lref = cblk->pass_lengths[1]; + + if (Lcup < 2) { + av_log(s->avctx, AV_LOG_ERROR, + "Cleanup pass length must be at least 2 bytes in length\n"); + return AVERROR_INVALIDDATA; + } + Dcup = cblk->data; + /* Dref comes after the refinement segment. */ + Dref = cblk->data + Lcup; + S_blk = p0 + cblk->zbp; + pLSB = 30 - S_blk; + + Scup = (Dcup[Lcup - 1] << 4) + (Dcup[Lcup - 2] & 0x0F); + + if (Scup < 2 || Scup > Lcup || Scup > 4079) { + av_log(s->avctx, AV_LOG_ERROR, "Cleanup pass suffix length is invalid %d\n", + Scup); + ret = AVERROR_INVALIDDATA; + goto free; + } + Pcup = Lcup - Scup; + + /* modDcup shall be done before the creation of vlc instance. */ + Dcup[Lcup - 1] = 0xFF; + Dcup[Lcup - 2] |= 0x0F; + /* Magnitude and refinement */ + jpeg2000_init_zero(&mag_sgn); + jpeg2000_bitbuf_refill_forward(&mag_sgn, Dcup, Pcup); + /* Significance propagation */ + jpeg2000_init_zero(&sig_prop); + /* Adaptive run length */ + jpeg2000_init_mel(&mel, Pcup); + /* Variable Length coding. */ + jpeg2000_init_vlc(&vlc, Lcup, Pcup, Dcup); + + jpeg2000_init_mel_decoder(&mel_state); + + sample_buf = av_calloc((width + 4) * (height + 4), sizeof(int32_t)); + block_states = av_calloc((width + 4) * (height + 4), sizeof(uint8_t)); + + if (!sample_buf || !block_states) { + ret = AVERROR(ENOMEM); + goto free; + } + if ((ret = jpeg2000_decode_ht_cleanup(s, cblk, t1, &mel_state, &mel, &vlc, + &mag_sgn, Dcup, Lcup, Pcup, pLSB, width, + height, sample_buf, block_states)) + < 0) + goto free; + + if (cblk->npasses > 1) + jpeg2000_decode_sigprop(cblk, width, height, Dref, Lref, + pLSB - 1, sample_buf, block_states); + + if (cblk->npasses > 2) + if ((ret = jpeg2000_decode_magref(cblk, width, height, Dref, Lref, + pLSB - 1, sample_buf, block_states)) + < 0) + goto free; + + pLSB = 31 - M_b; + /* Reconstruct the values. */ + for (int y = 0; y < height; y++) { + for (int x = 0; x < width; x++) { + n = x + (y * t1->stride); + val = sample_buf[x + (y * width)]; + /* Convert sign-magnitude to twos complement. */ + val = val >> 31 ? 0x80000000 - val : val; + val >>= (pLSB - 1); + t1->data[n] = val; + } + } +free: + av_freep(&sample_buf); + av_freep(&block_states); + return ret; +} + +/** + * @brief CtxVLC tables, borrowed from openhtj2k (https://github.com/osamu620/OpenHTJ2K) (credits to Osamu Watanabe) + */ +static const uint16_t dec_CxtVLC_table1[1024] = { + 0x0016, 0x006A, 0x0046, 0x00DD, 0x0086, 0x888B, 0x0026, 0x444D, 0x0016, 0x00AA, 0x0046, 0x88AD, 0x0086, + 0x003A, 0x0026, 0x00DE, 0x0016, 0x00CA, 0x0046, 0x009D, 0x0086, 0x005A, 0x0026, 0x222D, 0x0016, 0x009A, + 0x0046, 0x007D, 0x0086, 0x01FD, 0x0026, 0x007E, 0x0016, 0x006A, 0x0046, 0x88CD, 0x0086, 0x888B, 0x0026, + 0x111D, 0x0016, 0x00AA, 0x0046, 0x005D, 0x0086, 0x003A, 0x0026, 0x00EE, 0x0016, 0x00CA, 0x0046, 0x00BD, + 0x0086, 0x005A, 0x0026, 0x11FF, 0x0016, 0x009A, 0x0046, 0x003D, 0x0086, 0x04ED, 0x0026, 0x2AAF, 0x0016, + 0x006A, 0x0046, 0x00DD, 0x0086, 0x888B, 0x0026, 0x444D, 0x0016, 0x00AA, 0x0046, 0x88AD, 0x0086, 0x003A, + 0x0026, 0x44EF, 0x0016, 0x00CA, 0x0046, 0x009D, 0x0086, 0x005A, 0x0026, 0x222D, 0x0016, 0x009A, 0x0046, + 0x007D, 0x0086, 0x01FD, 0x0026, 0x00BE, 0x0016, 0x006A, 0x0046, 0x88CD, 0x0086, 0x888B, 0x0026, 0x111D, + 0x0016, 0x00AA, 0x0046, 0x005D, 0x0086, 0x003A, 0x0026, 0x4CCF, 0x0016, 0x00CA, 0x0046, 0x00BD, 0x0086, + 0x005A, 0x0026, 0x00FE, 0x0016, 0x009A, 0x0046, 0x003D, 0x0086, 0x04ED, 0x0026, 0x006F, 0x0002, 0x0088, + 0x0002, 0x005C, 0x0002, 0x0018, 0x0002, 0x00DE, 0x0002, 0x0028, 0x0002, 0x009C, 0x0002, 0x004A, 0x0002, + 0x007E, 0x0002, 0x0088, 0x0002, 0x00CC, 0x0002, 0x0018, 0x0002, 0x888F, 0x0002, 0x0028, 0x0002, 0x00FE, + 0x0002, 0x003A, 0x0002, 0x222F, 0x0002, 0x0088, 0x0002, 0x04FD, 0x0002, 0x0018, 0x0002, 0x00BE, 0x0002, + 0x0028, 0x0002, 0x00BF, 0x0002, 0x004A, 0x0002, 0x006E, 0x0002, 0x0088, 0x0002, 0x00AC, 0x0002, 0x0018, + 0x0002, 0x444F, 0x0002, 0x0028, 0x0002, 0x00EE, 0x0002, 0x003A, 0x0002, 0x113F, 0x0002, 0x0088, 0x0002, + 0x005C, 0x0002, 0x0018, 0x0002, 0x00CF, 0x0002, 0x0028, 0x0002, 0x009C, 0x0002, 0x004A, 0x0002, 0x006F, + 0x0002, 0x0088, 0x0002, 0x00CC, 0x0002, 0x0018, 0x0002, 0x009F, 0x0002, 0x0028, 0x0002, 0x00EF, 0x0002, + 0x003A, 0x0002, 0x233F, 0x0002, 0x0088, 0x0002, 0x04FD, 0x0002, 0x0018, 0x0002, 0x00AF, 0x0002, 0x0028, + 0x0002, 0x44FF, 0x0002, 0x004A, 0x0002, 0x005F, 0x0002, 0x0088, 0x0002, 0x00AC, 0x0002, 0x0018, 0x0002, + 0x007F, 0x0002, 0x0028, 0x0002, 0x00DF, 0x0002, 0x003A, 0x0002, 0x111F, 0x0002, 0x0028, 0x0002, 0x005C, + 0x0002, 0x008A, 0x0002, 0x00BF, 0x0002, 0x0018, 0x0002, 0x00FE, 0x0002, 0x00CC, 0x0002, 0x007E, 0x0002, + 0x0028, 0x0002, 0x8FFF, 0x0002, 0x004A, 0x0002, 0x007F, 0x0002, 0x0018, 0x0002, 0x00DF, 0x0002, 0x00AC, + 0x0002, 0x133F, 0x0002, 0x0028, 0x0002, 0x222D, 0x0002, 0x008A, 0x0002, 0x00BE, 0x0002, 0x0018, 0x0002, + 0x44EF, 0x0002, 0x2AAD, 0x0002, 0x006E, 0x0002, 0x0028, 0x0002, 0x15FF, 0x0002, 0x004A, 0x0002, 0x009E, + 0x0002, 0x0018, 0x0002, 0x00CF, 0x0002, 0x003C, 0x0002, 0x223F, 0x0002, 0x0028, 0x0002, 0x005C, 0x0002, + 0x008A, 0x0002, 0x2BBF, 0x0002, 0x0018, 0x0002, 0x04EF, 0x0002, 0x00CC, 0x0002, 0x006F, 0x0002, 0x0028, + 0x0002, 0x27FF, 0x0002, 0x004A, 0x0002, 0x009F, 0x0002, 0x0018, 0x0002, 0x00DE, 0x0002, 0x00AC, 0x0002, + 0x444F, 0x0002, 0x0028, 0x0002, 0x222D, 0x0002, 0x008A, 0x0002, 0x8AAF, 0x0002, 0x0018, 0x0002, 0x00EE, + 0x0002, 0x2AAD, 0x0002, 0x005F, 0x0002, 0x0028, 0x0002, 0x44FF, 0x0002, 0x004A, 0x0002, 0x888F, 0x0002, + 0x0018, 0x0002, 0xAAAF, 0x0002, 0x003C, 0x0002, 0x111F, 0x0004, 0x8FFD, 0x0028, 0x005C, 0x0004, 0x00BC, + 0x008A, 0x66FF, 0x0004, 0x00CD, 0x0018, 0x111D, 0x0004, 0x009C, 0x003A, 0x8AAF, 0x0004, 0x00FC, 0x0028, + 0x133D, 0x0004, 0x00AC, 0x004A, 0x3BBF, 0x0004, 0x2BBD, 0x0018, 0x5FFF, 0x0004, 0x006C, 0x157D, 0x455F, + 0x0004, 0x2FFD, 0x0028, 0x222D, 0x0004, 0x22AD, 0x008A, 0x44EF, 0x0004, 0x00CC, 0x0018, 0x4FFF, 0x0004, + 0x007C, 0x003A, 0x447F, 0x0004, 0x04DD, 0x0028, 0x233D, 0x0004, 0x009D, 0x004A, 0x00DE, 0x0004, 0x88BD, + 0x0018, 0xAFFF, 0x0004, 0x115D, 0x1FFD, 0x444F, 0x0004, 0x8FFD, 0x0028, 0x005C, 0x0004, 0x00BC, 0x008A, + 0x8CEF, 0x0004, 0x00CD, 0x0018, 0x111D, 0x0004, 0x009C, 0x003A, 0x888F, 0x0004, 0x00FC, 0x0028, 0x133D, + 0x0004, 0x00AC, 0x004A, 0x44DF, 0x0004, 0x2BBD, 0x0018, 0x8AFF, 0x0004, 0x006C, 0x157D, 0x006F, 0x0004, + 0x2FFD, 0x0028, 0x222D, 0x0004, 0x22AD, 0x008A, 0x00EE, 0x0004, 0x00CC, 0x0018, 0x2EEF, 0x0004, 0x007C, + 0x003A, 0x277F, 0x0004, 0x04DD, 0x0028, 0x233D, 0x0004, 0x009D, 0x004A, 0x1BBF, 0x0004, 0x88BD, 0x0018, + 0x37FF, 0x0004, 0x115D, 0x1FFD, 0x333F, 0x0002, 0x0088, 0x0002, 0x02ED, 0x0002, 0x00CA, 0x0002, 0x4CCF, + 0x0002, 0x0048, 0x0002, 0x23FF, 0x0002, 0x001A, 0x0002, 0x888F, 0x0002, 0x0088, 0x0002, 0x006C, 0x0002, + 0x002A, 0x0002, 0x00AF, 0x0002, 0x0048, 0x0002, 0x22EF, 0x0002, 0x00AC, 0x0002, 0x005F, 0x0002, 0x0088, + 0x0002, 0x444D, 0x0002, 0x00CA, 0x0002, 0xCCCF, 0x0002, 0x0048, 0x0002, 0x00FE, 0x0002, 0x001A, 0x0002, + 0x006F, 0x0002, 0x0088, 0x0002, 0x005C, 0x0002, 0x002A, 0x0002, 0x009F, 0x0002, 0x0048, 0x0002, 0x00DF, + 0x0002, 0x03FD, 0x0002, 0x222F, 0x0002, 0x0088, 0x0002, 0x02ED, 0x0002, 0x00CA, 0x0002, 0x8CCF, 0x0002, + 0x0048, 0x0002, 0x11FF, 0x0002, 0x001A, 0x0002, 0x007E, 0x0002, 0x0088, 0x0002, 0x006C, 0x0002, 0x002A, + 0x0002, 0x007F, 0x0002, 0x0048, 0x0002, 0x00EE, 0x0002, 0x00AC, 0x0002, 0x003E, 0x0002, 0x0088, 0x0002, + 0x444D, 0x0002, 0x00CA, 0x0002, 0x00BE, 0x0002, 0x0048, 0x0002, 0x00BF, 0x0002, 0x001A, 0x0002, 0x003F, + 0x0002, 0x0088, 0x0002, 0x005C, 0x0002, 0x002A, 0x0002, 0x009E, 0x0002, 0x0048, 0x0002, 0x00DE, 0x0002, + 0x03FD, 0x0002, 0x111F, 0x0004, 0x8AED, 0x0048, 0x888D, 0x0004, 0x00DC, 0x00CA, 0x3FFF, 0x0004, 0xCFFD, + 0x002A, 0x003D, 0x0004, 0x00BC, 0x005A, 0x8DDF, 0x0004, 0x8FFD, 0x0048, 0x006C, 0x0004, 0x027D, 0x008A, + 0x99FF, 0x0004, 0x00EC, 0x00FA, 0x003C, 0x0004, 0x00AC, 0x001A, 0x009F, 0x0004, 0x2FFD, 0x0048, 0x007C, + 0x0004, 0x44CD, 0x00CA, 0x67FF, 0x0004, 0x1FFD, 0x002A, 0x444D, 0x0004, 0x00AD, 0x005A, 0x8CCF, 0x0004, + 0x4FFD, 0x0048, 0x445D, 0x0004, 0x01BD, 0x008A, 0x4EEF, 0x0004, 0x45DD, 0x00FA, 0x111D, 0x0004, 0x009C, + 0x001A, 0x222F, 0x0004, 0x8AED, 0x0048, 0x888D, 0x0004, 0x00DC, 0x00CA, 0xAFFF, 0x0004, 0xCFFD, 0x002A, + 0x003D, 0x0004, 0x00BC, 0x005A, 0x11BF, 0x0004, 0x8FFD, 0x0048, 0x006C, 0x0004, 0x027D, 0x008A, 0x22EF, + 0x0004, 0x00EC, 0x00FA, 0x003C, 0x0004, 0x00AC, 0x001A, 0x227F, 0x0004, 0x2FFD, 0x0048, 0x007C, 0x0004, + 0x44CD, 0x00CA, 0x5DFF, 0x0004, 0x1FFD, 0x002A, 0x444D, 0x0004, 0x00AD, 0x005A, 0x006F, 0x0004, 0x4FFD, + 0x0048, 0x445D, 0x0004, 0x01BD, 0x008A, 0x11DF, 0x0004, 0x45DD, 0x00FA, 0x111D, 0x0004, 0x009C, 0x001A, + 0x155F, 0x0006, 0x00FC, 0x0018, 0x111D, 0x0048, 0x888D, 0x00AA, 0x4DDF, 0x0006, 0x2AAD, 0x005A, 0x67FF, + 0x0028, 0x223D, 0x00BC, 0xAAAF, 0x0006, 0x00EC, 0x0018, 0x5FFF, 0x0048, 0x006C, 0x008A, 0xCCCF, 0x0006, + 0x009D, 0x00CA, 0x44EF, 0x0028, 0x003C, 0x8FFD, 0x137F, 0x0006, 0x8EED, 0x0018, 0x1FFF, 0x0048, 0x007C, + 0x00AA, 0x4CCF, 0x0006, 0x227D, 0x005A, 0x1DDF, 0x0028, 0x444D, 0x4FFD, 0x155F, 0x0006, 0x00DC, 0x0018, + 0x2EEF, 0x0048, 0x445D, 0x008A, 0x22BF, 0x0006, 0x009C, 0x00CA, 0x8CDF, 0x0028, 0x222D, 0x2FFD, 0x226F, + 0x0006, 0x00FC, 0x0018, 0x111D, 0x0048, 0x888D, 0x00AA, 0x1BBF, 0x0006, 0x2AAD, 0x005A, 0x33FF, 0x0028, + 0x223D, 0x00BC, 0x8AAF, 0x0006, 0x00EC, 0x0018, 0x9BFF, 0x0048, 0x006C, 0x008A, 0x8ABF, 0x0006, 0x009D, + 0x00CA, 0x4EEF, 0x0028, 0x003C, 0x8FFD, 0x466F, 0x0006, 0x8EED, 0x0018, 0xCFFF, 0x0048, 0x007C, 0x00AA, + 0x8CCF, 0x0006, 0x227D, 0x005A, 0xAEEF, 0x0028, 0x444D, 0x4FFD, 0x477F, 0x0006, 0x00DC, 0x0018, 0xAFFF, + 0x0048, 0x445D, 0x008A, 0x2BBF, 0x0006, 0x009C, 0x00CA, 0x44DF, 0x0028, 0x222D, 0x2FFD, 0x133F, 0x00F6, + 0xAFFD, 0x1FFB, 0x003C, 0x0008, 0x23BD, 0x007A, 0x11DF, 0x00F6, 0x45DD, 0x2FFB, 0x4EEF, 0x00DA, 0x177D, + 0xCFFD, 0x377F, 0x00F6, 0x3FFD, 0x8FFB, 0x111D, 0x0008, 0x009C, 0x005A, 0x1BBF, 0x00F6, 0x00CD, 0x00BA, + 0x8DDF, 0x4FFB, 0x006C, 0x9BFD, 0x455F, 0x00F6, 0x67FD, 0x1FFB, 0x002C, 0x0008, 0x00AC, 0x007A, 0x009F, + 0x00F6, 0x00AD, 0x2FFB, 0x7FFF, 0x00DA, 0x004C, 0x5FFD, 0x477F, 0x00F6, 0x00EC, 0x8FFB, 0x001C, 0x0008, + 0x008C, 0x005A, 0x888F, 0x00F6, 0x00CC, 0x00BA, 0x2EEF, 0x4FFB, 0x115D, 0x8AED, 0x113F, 0x00F6, 0xAFFD, + 0x1FFB, 0x003C, 0x0008, 0x23BD, 0x007A, 0x1DDF, 0x00F6, 0x45DD, 0x2FFB, 0xBFFF, 0x00DA, 0x177D, 0xCFFD, + 0x447F, 0x00F6, 0x3FFD, 0x8FFB, 0x111D, 0x0008, 0x009C, 0x005A, 0x277F, 0x00F6, 0x00CD, 0x00BA, 0x22EF, + 0x4FFB, 0x006C, 0x9BFD, 0x444F, 0x00F6, 0x67FD, 0x1FFB, 0x002C, 0x0008, 0x00AC, 0x007A, 0x11BF, 0x00F6, + 0x00AD, 0x2FFB, 0xFFFF, 0x00DA, 0x004C, 0x5FFD, 0x233F, 0x00F6, 0x00EC, 0x8FFB, 0x001C, 0x0008, 0x008C, + 0x005A, 0x006F, 0x00F6, 0x00CC, 0x00BA, 0x8BBF, 0x4FFB, 0x115D, 0x8AED, 0x222F}; + +static const uint16_t dec_CxtVLC_table0[1024] = { + 0x0026, 0x00AA, 0x0046, 0x006C, 0x0086, 0x8AED, 0x0018, 0x8DDF, 0x0026, 0x01BD, 0x0046, 0x5FFF, 0x0086, + 0x027D, 0x005A, 0x155F, 0x0026, 0x003A, 0x0046, 0x444D, 0x0086, 0x4CCD, 0x0018, 0xCCCF, 0x0026, 0x2EFD, + 0x0046, 0x99FF, 0x0086, 0x009C, 0x00CA, 0x133F, 0x0026, 0x00AA, 0x0046, 0x445D, 0x0086, 0x8CCD, 0x0018, + 0x11DF, 0x0026, 0x4FFD, 0x0046, 0xCFFF, 0x0086, 0x009D, 0x005A, 0x007E, 0x0026, 0x003A, 0x0046, 0x1FFF, + 0x0086, 0x88AD, 0x0018, 0x00BE, 0x0026, 0x8FFD, 0x0046, 0x4EEF, 0x0086, 0x888D, 0x00CA, 0x111F, 0x0026, + 0x00AA, 0x0046, 0x006C, 0x0086, 0x8AED, 0x0018, 0x45DF, 0x0026, 0x01BD, 0x0046, 0x22EF, 0x0086, 0x027D, + 0x005A, 0x227F, 0x0026, 0x003A, 0x0046, 0x444D, 0x0086, 0x4CCD, 0x0018, 0x11BF, 0x0026, 0x2EFD, 0x0046, + 0x00FE, 0x0086, 0x009C, 0x00CA, 0x223F, 0x0026, 0x00AA, 0x0046, 0x445D, 0x0086, 0x8CCD, 0x0018, 0x00DE, + 0x0026, 0x4FFD, 0x0046, 0xABFF, 0x0086, 0x009D, 0x005A, 0x006F, 0x0026, 0x003A, 0x0046, 0x6EFF, 0x0086, + 0x88AD, 0x0018, 0x2AAF, 0x0026, 0x8FFD, 0x0046, 0x00EE, 0x0086, 0x888D, 0x00CA, 0x222F, 0x0004, 0x00CA, + 0x0088, 0x027D, 0x0004, 0x4CCD, 0x0028, 0x00FE, 0x0004, 0x2AFD, 0x0048, 0x005C, 0x0004, 0x009D, 0x0018, + 0x00DE, 0x0004, 0x01BD, 0x0088, 0x006C, 0x0004, 0x88AD, 0x0028, 0x11DF, 0x0004, 0x8AED, 0x0048, 0x003C, + 0x0004, 0x888D, 0x0018, 0x111F, 0x0004, 0x00CA, 0x0088, 0x006D, 0x0004, 0x88CD, 0x0028, 0x88FF, 0x0004, + 0x8BFD, 0x0048, 0x444D, 0x0004, 0x009C, 0x0018, 0x00BE, 0x0004, 0x4EFD, 0x0088, 0x445D, 0x0004, 0x00AC, + 0x0028, 0x00EE, 0x0004, 0x45DD, 0x0048, 0x222D, 0x0004, 0x003D, 0x0018, 0x007E, 0x0004, 0x00CA, 0x0088, + 0x027D, 0x0004, 0x4CCD, 0x0028, 0x1FFF, 0x0004, 0x2AFD, 0x0048, 0x005C, 0x0004, 0x009D, 0x0018, 0x11BF, + 0x0004, 0x01BD, 0x0088, 0x006C, 0x0004, 0x88AD, 0x0028, 0x22EF, 0x0004, 0x8AED, 0x0048, 0x003C, 0x0004, + 0x888D, 0x0018, 0x227F, 0x0004, 0x00CA, 0x0088, 0x006D, 0x0004, 0x88CD, 0x0028, 0x4EEF, 0x0004, 0x8BFD, + 0x0048, 0x444D, 0x0004, 0x009C, 0x0018, 0x2AAF, 0x0004, 0x4EFD, 0x0088, 0x445D, 0x0004, 0x00AC, 0x0028, + 0x8DDF, 0x0004, 0x45DD, 0x0048, 0x222D, 0x0004, 0x003D, 0x0018, 0x155F, 0x0004, 0x005A, 0x0088, 0x006C, + 0x0004, 0x88DD, 0x0028, 0x23FF, 0x0004, 0x11FD, 0x0048, 0x444D, 0x0004, 0x00AD, 0x0018, 0x00BE, 0x0004, + 0x137D, 0x0088, 0x155D, 0x0004, 0x00CC, 0x0028, 0x00DE, 0x0004, 0x02ED, 0x0048, 0x111D, 0x0004, 0x009D, + 0x0018, 0x007E, 0x0004, 0x005A, 0x0088, 0x455D, 0x0004, 0x44CD, 0x0028, 0x00EE, 0x0004, 0x1FFD, 0x0048, + 0x003C, 0x0004, 0x00AC, 0x0018, 0x555F, 0x0004, 0x47FD, 0x0088, 0x113D, 0x0004, 0x02BD, 0x0028, 0x477F, + 0x0004, 0x4CDD, 0x0048, 0x8FFF, 0x0004, 0x009C, 0x0018, 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decoder +* Copyright (c) 2022 Caleb Etemesi +* +* This file is part of FFmpeg. +* +* FFmpeg is free software; you can redistribute it and/or +* modify it under the terms of the GNU Lesser General Public +* License as published by the Free Software Foundation; either +* version 2.1 of the License, or (at your option) any later version. +* +* FFmpeg is distributed in the hope that it will be useful, +* but WITHOUT ANY WARRANTY; without even the implied warranty of +* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU +* Lesser General Public License for more details. +* +* You should have received a copy of the GNU Lesser General Public +* License along with FFmpeg; if not, write to the Free Software +* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA + */ +#ifndef AVCODEC_JPEG2000HTDEC_H +#define AVCODEC_JPEG2000HTDEC_H + +#include "jpeg2000dec.h" + +int ff_jpeg2000_decode_htj2k(const Jpeg2000DecoderContext *s, Jpeg2000CodingStyle *codsty, Jpeg2000T1Context *t1, Jpeg2000Cblk *cblk, int width, int height, int magp, uint8_t roi_shift); + +#endif /* AVCODEC_JPEG2000HTDEC_H */