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authorNicolas Bertrand <nicoinattendu@gmail.com>2013-04-22 11:41:01 +0200
committerDiego Biurrun <diego@biurrun.de>2013-04-22 15:38:29 +0200
commitc81a70638116eaf4251075475e5cbb600a33c5ec (patch)
treeaa1763bfcab7c9d475bba445ca99de2bfe805826 /libavcodec/jpeg2000.h
parent0c15a9aa7e1654a19144eb594f9639a57fd47482 (diff)
downloadffmpeg-c81a70638116eaf4251075475e5cbb600a33c5ec.tar.gz
JPEG 2000 decoder for DCinema
Based on the 2007 GSoC project from Kamil Nowosad <k.nowosad@students.mimuw.edu.pl> Updated to current programming standards, style and many more small fixes by Diego Biurrun <diego@biurrun.de>. Signed-off-by: Diego Biurrun <diego@biurrun.de>
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+/*
+ * JPEG 2000 common defines, structures and functions
+ * Copyright (c) 2007 Kamil Nowosad
+ * Copyright (c) 2013 Nicolas Bertrand <nicoinattendu@gmail.com>
+ *
+ * This file is part of Libav.
+ *
+ * Libav 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.
+ *
+ * Libav 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 Libav; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+
+#ifndef AVCODEC_JPEG2000_H
+#define AVCODEC_JPEG2000_H
+
+/**
+ * @file
+ * JPEG 2000 structures and defines common
+ * to encoder and decoder
+ */
+
+#include <stdint.h>
+
+#include "avcodec.h"
+#include "mqc.h"
+#include "jpeg2000dwt.h"
+
+enum Jpeg2000Markers {
+ JPEG2000_SOC = 0xff4f, // start of codestream
+ JPEG2000_SIZ = 0xff51, // image and tile size
+ JPEG2000_COD, // coding style default
+ JPEG2000_COC, // coding style component
+ JPEG2000_TLM = 0xff55, // packed packet headers, tile-part header
+ JPEG2000_PLM = 0xff57, // tile-part lengths
+ JPEG2000_PLT, // packet length, main header
+ JPEG2000_QCD = 0xff5c, // quantization default
+ JPEG2000_QCC, // quantization component
+ JPEG2000_RGN, // region of interest
+ JPEG2000_POC, // progression order change
+ JPEG2000_PPM, // packet length, tile-part header
+ JPEG2000_PPT, // packed packet headers, main header
+ JPEG2000_CRG = 0xff63, // component registration
+ JPEG2000_COM, // comment
+ JPEG2000_SOT = 0xff90, // start of tile-part
+ JPEG2000_SOP, // start of packet
+ JPEG2000_EPH, // end of packet header
+ JPEG2000_SOD, // start of data
+ JPEG2000_EOC = 0xffd9, // end of codestream
+};
+
+enum Jpeg2000Quantsty { // quantization style
+ JPEG2000_QSTY_NONE, // no quantization
+ JPEG2000_QSTY_SI, // scalar derived
+ JPEG2000_QSTY_SE // scalar expounded
+};
+
+#define JPEG2000_MAX_CBLKW 64
+#define JPEG2000_MAX_CBLKH 64
+
+#define JPEG2000_MAX_RESLEVELS 33
+
+// T1 flags
+// flags determining significance of neighbor coefficients
+#define JPEG2000_T1_SIG_N 0x0001
+#define JPEG2000_T1_SIG_E 0x0002
+#define JPEG2000_T1_SIG_W 0x0004
+#define JPEG2000_T1_SIG_S 0x0008
+#define JPEG2000_T1_SIG_NE 0x0010
+#define JPEG2000_T1_SIG_NW 0x0020
+#define JPEG2000_T1_SIG_SE 0x0040
+#define JPEG2000_T1_SIG_SW 0x0080
+#define JPEG2000_T1_SIG_NB (JPEG2000_T1_SIG_N | JPEG2000_T1_SIG_E | \
+ JPEG2000_T1_SIG_S | JPEG2000_T1_SIG_W | \
+ JPEG2000_T1_SIG_NE | JPEG2000_T1_SIG_NW | \
+ JPEG2000_T1_SIG_SE | JPEG2000_T1_SIG_SW)
+// flags determining sign bit of neighbor coefficients
+#define JPEG2000_T1_SGN_N 0x0100
+#define JPEG2000_T1_SGN_S 0x0200
+#define JPEG2000_T1_SGN_W 0x0400
+#define JPEG2000_T1_SGN_E 0x0800
+
+#define JPEG2000_T1_VIS 0x1000
+#define JPEG2000_T1_SIG 0x2000
+#define JPEG2000_T1_REF 0x4000
+
+#define JPEG2000_T1_SGN 0x8000
+
+// Codeblock coding styles
+#define JPEG2000_CBLK_BYPASS 0x01 // Selective arithmetic coding bypass
+#define JPEG2000_CBLK_RESET 0x02 // Reset context probabilities
+#define JPEG2000_CBLK_TERMALL 0x04 // Terminate after each coding pass
+#define JPEG2000_CBLK_VSC 0x08 // Vertical stripe causal context formation
+#define JPEG2000_CBLK_PREDTERM 0x10 // Predictable termination
+#define JPEG2000_CBLK_SEGSYM 0x20 // Segmentation symbols present
+
+// Coding styles
+#define JPEG2000_CSTY_PREC 0x01 // Precincts defined in coding style
+#define JPEG2000_CSTY_SOP 0x02 // SOP marker present
+#define JPEG2000_CSTY_EPH 0x04 // EPH marker present
+
+// Progression orders
+#define JPEG2000_PGOD_LRCP 0x00 // Layer-resolution level-component-position progression
+#define JPEG2000_PGOD_RLCP 0x01 // Resolution level-layer-component-position progression
+#define JPEG2000_PGOD_RPCL 0x02 // Resolution level-position-component-layer progression
+#define JPEG2000_PGOD_PCRL 0x03 // Position-component-resolution level-layer progression
+#define JPEG2000_PGOD_CPRL 0x04 // Component-position-resolution level-layer progression
+
+typedef struct Jpeg2000T1Context {
+ int data[JPEG2000_MAX_CBLKW][JPEG2000_MAX_CBLKH];
+ int flags[JPEG2000_MAX_CBLKW + 2][JPEG2000_MAX_CBLKH + 2];
+ MqcState mqc;
+} Jpeg2000T1Context;
+
+typedef struct Jpeg2000TgtNode {
+ uint8_t val;
+ uint8_t vis;
+ struct Jpeg2000TgtNode *parent;
+} Jpeg2000TgtNode;
+
+typedef struct Jpeg2000CodingStyle {
+ uint8_t nreslevels; // number of resolution levels
+ uint8_t nreslevels2decode; // number of resolution levels to decode
+ uint8_t log2_cblk_width,
+ log2_cblk_height; // exponent of codeblock size
+ uint8_t transform; // DWT type
+ uint8_t csty; // coding style
+ uint8_t log2_prec_width,
+ log2_prec_height; // precinct size
+ uint8_t nlayers; // number of layers
+ uint8_t mct; // multiple component transformation
+ uint8_t cblk_style; // codeblock coding style
+ uint8_t prog_order; // progression order
+ uint8_t log2_prec_widths[JPEG2000_MAX_RESLEVELS]; // precincts size according resolution levels
+ uint8_t log2_prec_heights[JPEG2000_MAX_RESLEVELS]; // TODO: initialize prec_size array with 0?
+} Jpeg2000CodingStyle;
+
+typedef struct Jpeg2000QuantStyle {
+ uint8_t expn[32 * 3]; // quantization exponent
+ uint32_t mant[32 * 3]; // quantization mantissa
+ uint8_t quantsty; // quantization style
+ uint8_t nguardbits; // number of guard bits
+} Jpeg2000QuantStyle;
+
+typedef struct Jpeg2000Pass {
+ uint16_t rate;
+ int64_t disto;
+} Jpeg2000Pass;
+
+typedef struct Jpeg2000Cblk {
+ uint8_t npasses;
+ uint8_t ninclpasses; // number coding of passes included in codestream
+ uint8_t nonzerobits;
+ uint16_t length;
+ uint16_t lengthinc;
+ uint8_t lblock;
+ uint8_t zero;
+ uint8_t data[8192];
+ Jpeg2000Pass passes[100];
+ uint16_t coord[2][2]; // border coordinates {{x0, x1}, {y0, y1}}
+} Jpeg2000Cblk; // code block
+
+typedef struct Jpeg2000Prec {
+ uint16_t xi0, yi0; // codeblock indexes ([xi0, xi1))
+ uint16_t nb_codeblocks_width;
+ uint16_t nb_codeblocks_height;
+ Jpeg2000TgtNode *zerobits;
+ Jpeg2000TgtNode *cblkincl;
+ Jpeg2000Cblk *cblk;
+ uint16_t coord[2][2]; // border coordinates {{x0, x1}, {y0, y1}}
+} Jpeg2000Prec; // precinct
+
+/* TODO: stepsize can be float or integer depending on
+ * reversible or irreversible transformation. */
+typedef struct Jpeg2000Band {
+ uint16_t coord[2][2]; // border coordinates {{x0, x1}, {y0, y1}}
+ uint16_t log2_cblk_width, log2_cblk_height;
+ uint16_t cblknx, cblkny;
+ float stepsize; // quantization stepsize
+ Jpeg2000Prec *prec;
+} Jpeg2000Band; // subband
+
+typedef struct Jpeg2000ResLevel {
+ uint8_t nbands;
+ uint16_t coord[2][2]; // border coordinates {{x0, x1}, {y0, y1}}
+ uint16_t num_precincts_x, num_precincts_y; // number of precincts in x/y direction
+ uint8_t log2_prec_width, log2_prec_height; // exponent of precinct size
+ Jpeg2000Band *band;
+} Jpeg2000ResLevel; // resolution level
+
+/* TODO: data can be float of integer depending of reversible/irreversible
+ * transformation.
+ */
+typedef struct Jpeg2000Component {
+ Jpeg2000ResLevel *reslevel;
+ DWTContext dwt;
+ float *data;
+ uint16_t coord[2][2]; // border coordinates {{x0, x1}, {y0, y1}} -- can be reduced with lowres option
+ uint16_t coord_o[2][2]; // border coordinates {{x0, x1}, {y0, y1}} -- original values from jpeg2000 headers
+} Jpeg2000Component;
+
+/* misc tools */
+static inline int ff_jpeg2000_ceildivpow2(int a, int b)
+{
+ return (a + (1 << b) - 1) >> b;
+}
+
+static inline int ff_jpeg2000_ceildiv(int a, int b)
+{
+ return (a + b - 1) / b;
+}
+
+/* TIER-1 routines */
+
+/* Set up lookup tables used in TIER-1. */
+void ff_jpeg2000_init_tier1_luts(void);
+
+/* Update significance of a coefficient at current position (x,y) and
+ * for neighbors. */
+void ff_jpeg2000_set_significance(Jpeg2000T1Context *t1,
+ int x, int y, int negative);
+
+extern uint8_t ff_jpeg2000_sigctxno_lut[256][4];
+
+/* Get context label (number in range[0..8]) of a coefficient for significance
+ * propagation and cleanup coding passes. */
+static inline int ff_jpeg2000_getsigctxno(int flag, int bandno)
+{
+ return ff_jpeg2000_sigctxno_lut[flag & 255][bandno];
+}
+
+static const uint8_t refctxno_lut[2][2] = { { 14, 15 }, { 16, 16 } };
+
+/* Get context label (number in range[14..16]) of a coefficient for magnitude
+ * refinement pass. */
+static inline int ff_jpeg2000_getrefctxno(int flag)
+{
+ return refctxno_lut[(flag >> 14) & 1][(flag & 255) != 0];
+}
+
+extern uint8_t ff_jpeg2000_sgnctxno_lut[16][16];
+extern uint8_t ff_jpeg2000_xorbit_lut[16][16];
+
+/* Get context label (number in range[9..13]) for sign decoding. */
+static inline int ff_jpeg2000_getsgnctxno(int flag, int *xorbit)
+{
+ *xorbit = ff_jpeg2000_xorbit_lut[flag & 15][(flag >> 8) & 15];
+ return ff_jpeg2000_sgnctxno_lut[flag & 15][(flag >> 8) & 15];
+}
+
+int ff_jpeg2000_init_component(Jpeg2000Component *comp,
+ Jpeg2000CodingStyle *codsty,
+ Jpeg2000QuantStyle *qntsty,
+ int cbps, int dx, int dy,
+ AVCodecContext *ctx);
+
+void ff_jpeg2000_cleanup(Jpeg2000Component *comp, Jpeg2000CodingStyle *codsty);
+
+#endif /* AVCODEC_JPEG2000_H */