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Nagram/TMessagesProj/jni/mozjpeg/jpegint.h
DrKLO 1139e12ef1 Update to 7.1.0 (2090)
2020-09-30 16:48:47 +03:00

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C
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/*
* jpegint.h
*
* This file was part of the Independent JPEG Group's software:
* Copyright (C) 1991-1997, Thomas G. Lane.
* Modified 1997-2009 by Guido Vollbeding.
* libjpeg-turbo Modifications:
* Copyright (C) 2015-2016, D. R. Commander.
* Copyright (C) 2015, Google, Inc.
* mozjpeg Modifications:
* Copyright (C) 2014, Mozilla Corporation.
* For conditions of distribution and use, see the accompanying README.ijg
* file.
*
* This file provides common declarations for the various JPEG modules.
* These declarations are considered internal to the JPEG library; most
* applications using the library shouldn't need to include this file.
*/
/* Declarations for both compression & decompression */
typedef enum { /* Operating modes for buffer controllers */
JBUF_PASS_THRU, /* Plain stripwise operation */
/* Remaining modes require a full-image buffer to have been created */
JBUF_SAVE_SOURCE, /* Run source subobject only, save output */
JBUF_CRANK_DEST, /* Run dest subobject only, using saved data */
JBUF_SAVE_AND_PASS, /* Run both subobjects, save output */
JBUF_REQUANT /* Requantize */
} J_BUF_MODE;
/* Values of global_state field (jdapi.c has some dependencies on ordering!) */
#define CSTATE_START 100 /* after create_compress */
#define CSTATE_SCANNING 101 /* start_compress done, write_scanlines OK */
#define CSTATE_RAW_OK 102 /* start_compress done, write_raw_data OK */
#define CSTATE_WRCOEFS 103 /* jpeg_write_coefficients done */
#define DSTATE_START 200 /* after create_decompress */
#define DSTATE_INHEADER 201 /* reading header markers, no SOS yet */
#define DSTATE_READY 202 /* found SOS, ready for start_decompress */
#define DSTATE_PRELOAD 203 /* reading multiscan file in start_decompress*/
#define DSTATE_PRESCAN 204 /* performing dummy pass for 2-pass quant */
#define DSTATE_SCANNING 205 /* start_decompress done, read_scanlines OK */
#define DSTATE_RAW_OK 206 /* start_decompress done, read_raw_data OK */
#define DSTATE_BUFIMAGE 207 /* expecting jpeg_start_output */
#define DSTATE_BUFPOST 208 /* looking for SOS/EOI in jpeg_finish_output */
#define DSTATE_RDCOEFS 209 /* reading file in jpeg_read_coefficients */
#define DSTATE_STOPPING 210 /* looking for EOI in jpeg_finish_decompress */
/* JLONG must hold at least signed 32-bit values. */
typedef long JLONG;
/*
* Left shift macro that handles a negative operand without causing any
* sanitizer warnings
*/
#define LEFT_SHIFT(a, b) ((JLONG)((unsigned long)(a) << (b)))
/* Declarations for compression modules */
/* Master control module */
struct jpeg_comp_master {
void (*prepare_for_pass) (j_compress_ptr cinfo);
void (*pass_startup) (j_compress_ptr cinfo);
void (*finish_pass) (j_compress_ptr cinfo);
/* State variables made visible to other modules */
boolean call_pass_startup; /* True if pass_startup must be called */
boolean is_last_pass; /* True during last pass */
/* Extension parameters */
boolean optimize_scans; /* TRUE=optimize progressive coding scans */
boolean trellis_quant; /* TRUE=use trellis quantization */
boolean trellis_quant_dc; /* TRUE=use trellis quant for DC coefficient */
boolean trellis_eob_opt; /* TRUE=optimize for sequences of EOB */
boolean use_lambda_weight_tbl; /* TRUE=use lambda weighting table */
boolean use_scans_in_trellis; /* TRUE=use scans in trellis optimization */
boolean trellis_passes; /* TRUE=currently doing trellis-related passes [not exposed] */
boolean trellis_q_opt; /* TRUE=optimize quant table in trellis loop */
boolean overshoot_deringing; /* TRUE=preprocess input to reduce ringing of edges on white background */
double norm_src[NUM_QUANT_TBLS][DCTSIZE2];
double norm_coef[NUM_QUANT_TBLS][DCTSIZE2];
int compress_profile; /* compression profile */
int dc_scan_opt_mode; /* DC scan optimization mode */
int quant_tbl_master_idx; /* Quantization table master index */
int trellis_freq_split; /* splitting point for frequency in trellis quantization */
int trellis_num_loops; /* number of trellis loops */
int num_scans_luma; /* # of entries in scan_info array pertaining to luma (used when optimize_scans is TRUE */
int num_scans_luma_dc;
int num_scans_chroma_dc;
int num_frequency_splits;
int Al_max_luma; /* maximum value of Al tested when optimizing scans (luma) */
int Al_max_chroma; /* maximum value of Al tested when optimizing scans (chroma) */
float lambda_log_scale1;
float lambda_log_scale2;
float trellis_delta_dc_weight;
};
#ifdef C_ARITH_CODING_SUPPORTED
/* The following two definitions specify the allocation chunk size
* for the statistics area.
* According to sections F.1.4.4.1.3 and F.1.4.4.2, we need at least
* 49 statistics bins for DC, and 245 statistics bins for AC coding.
*
* We use a compact representation with 1 byte per statistics bin,
* thus the numbers directly represent byte sizes.
* This 1 byte per statistics bin contains the meaning of the MPS
* (more probable symbol) in the highest bit (mask 0x80), and the
* index into the probability estimation state machine table
* in the lower bits (mask 0x7F).
*/
#define DC_STAT_BINS 64
#define AC_STAT_BINS 256
typedef struct {
float rate_dc[DC_STAT_BINS][2];
float rate_ac[AC_STAT_BINS][2];
int arith_dc_L;
int arith_dc_U;
int arith_ac_K;
} arith_rates;
#endif
/* Main buffer control (downsampled-data buffer) */
struct jpeg_c_main_controller {
void (*start_pass) (j_compress_ptr cinfo, J_BUF_MODE pass_mode);
void (*process_data) (j_compress_ptr cinfo, JSAMPARRAY input_buf,
JDIMENSION *in_row_ctr, JDIMENSION in_rows_avail);
};
/* Compression preprocessing (downsampling input buffer control) */
struct jpeg_c_prep_controller {
void (*start_pass) (j_compress_ptr cinfo, J_BUF_MODE pass_mode);
void (*pre_process_data) (j_compress_ptr cinfo, JSAMPARRAY input_buf,
JDIMENSION *in_row_ctr, JDIMENSION in_rows_avail,
JSAMPIMAGE output_buf,
JDIMENSION *out_row_group_ctr,
JDIMENSION out_row_groups_avail);
};
/* Coefficient buffer control */
struct jpeg_c_coef_controller {
void (*start_pass) (j_compress_ptr cinfo, J_BUF_MODE pass_mode);
boolean (*compress_data) (j_compress_ptr cinfo, JSAMPIMAGE input_buf);
};
/* Colorspace conversion */
struct jpeg_color_converter {
void (*start_pass) (j_compress_ptr cinfo);
void (*color_convert) (j_compress_ptr cinfo, JSAMPARRAY input_buf,
JSAMPIMAGE output_buf, JDIMENSION output_row,
int num_rows);
};
/* Downsampling */
struct jpeg_downsampler {
void (*start_pass) (j_compress_ptr cinfo);
void (*downsample) (j_compress_ptr cinfo, JSAMPIMAGE input_buf,
JDIMENSION in_row_index, JSAMPIMAGE output_buf,
JDIMENSION out_row_group_index);
boolean need_context_rows; /* TRUE if need rows above & below */
};
/* Forward DCT (also controls coefficient quantization) */
struct jpeg_forward_dct {
void (*start_pass) (j_compress_ptr cinfo);
/* perhaps this should be an array??? */
void (*forward_DCT) (j_compress_ptr cinfo, jpeg_component_info *compptr,
JSAMPARRAY sample_data, JBLOCKROW coef_blocks,
JDIMENSION start_row, JDIMENSION start_col,
JDIMENSION num_blocks, JBLOCKROW dst);
};
/* Entropy encoding */
struct jpeg_entropy_encoder {
void (*start_pass) (j_compress_ptr cinfo, boolean gather_statistics);
boolean (*encode_mcu) (j_compress_ptr cinfo, JBLOCKROW *MCU_data);
void (*finish_pass) (j_compress_ptr cinfo);
};
/* Marker writing */
struct jpeg_marker_writer {
void (*write_file_header) (j_compress_ptr cinfo);
void (*write_frame_header) (j_compress_ptr cinfo);
void (*write_scan_header) (j_compress_ptr cinfo);
void (*write_file_trailer) (j_compress_ptr cinfo);
void (*write_tables_only) (j_compress_ptr cinfo);
/* These routines are exported to allow insertion of extra markers */
/* Probably only COM and APPn markers should be written this way */
void (*write_marker_header) (j_compress_ptr cinfo, int marker,
unsigned int datalen);
void (*write_marker_byte) (j_compress_ptr cinfo, int val);
};
/* Declarations for decompression modules */
/* Master control module */
struct jpeg_decomp_master {
void (*prepare_for_output_pass) (j_decompress_ptr cinfo);
void (*finish_output_pass) (j_decompress_ptr cinfo);
/* State variables made visible to other modules */
boolean is_dummy_pass; /* True during 1st pass for 2-pass quant */
/* Partial decompression variables */
JDIMENSION first_iMCU_col;
JDIMENSION last_iMCU_col;
JDIMENSION first_MCU_col[MAX_COMPONENTS];
JDIMENSION last_MCU_col[MAX_COMPONENTS];
boolean jinit_upsampler_no_alloc;
};
/* Input control module */
struct jpeg_input_controller {
int (*consume_input) (j_decompress_ptr cinfo);
void (*reset_input_controller) (j_decompress_ptr cinfo);
void (*start_input_pass) (j_decompress_ptr cinfo);
void (*finish_input_pass) (j_decompress_ptr cinfo);
/* State variables made visible to other modules */
boolean has_multiple_scans; /* True if file has multiple scans */
boolean eoi_reached; /* True when EOI has been consumed */
};
/* Main buffer control (downsampled-data buffer) */
struct jpeg_d_main_controller {
void (*start_pass) (j_decompress_ptr cinfo, J_BUF_MODE pass_mode);
void (*process_data) (j_decompress_ptr cinfo, JSAMPARRAY output_buf,
JDIMENSION *out_row_ctr, JDIMENSION out_rows_avail);
};
/* Coefficient buffer control */
struct jpeg_d_coef_controller {
void (*start_input_pass) (j_decompress_ptr cinfo);
int (*consume_data) (j_decompress_ptr cinfo);
void (*start_output_pass) (j_decompress_ptr cinfo);
int (*decompress_data) (j_decompress_ptr cinfo, JSAMPIMAGE output_buf);
/* Pointer to array of coefficient virtual arrays, or NULL if none */
jvirt_barray_ptr *coef_arrays;
};
/* Decompression postprocessing (color quantization buffer control) */
struct jpeg_d_post_controller {
void (*start_pass) (j_decompress_ptr cinfo, J_BUF_MODE pass_mode);
void (*post_process_data) (j_decompress_ptr cinfo, JSAMPIMAGE input_buf,
JDIMENSION *in_row_group_ctr,
JDIMENSION in_row_groups_avail,
JSAMPARRAY output_buf, JDIMENSION *out_row_ctr,
JDIMENSION out_rows_avail);
};
/* Marker reading & parsing */
struct jpeg_marker_reader {
void (*reset_marker_reader) (j_decompress_ptr cinfo);
/* Read markers until SOS or EOI.
* Returns same codes as are defined for jpeg_consume_input:
* JPEG_SUSPENDED, JPEG_REACHED_SOS, or JPEG_REACHED_EOI.
*/
int (*read_markers) (j_decompress_ptr cinfo);
/* Read a restart marker --- exported for use by entropy decoder only */
jpeg_marker_parser_method read_restart_marker;
/* State of marker reader --- nominally internal, but applications
* supplying COM or APPn handlers might like to know the state.
*/
boolean saw_SOI; /* found SOI? */
boolean saw_SOF; /* found SOF? */
int next_restart_num; /* next restart number expected (0-7) */
unsigned int discarded_bytes; /* # of bytes skipped looking for a marker */
};
/* Entropy decoding */
struct jpeg_entropy_decoder {
void (*start_pass) (j_decompress_ptr cinfo);
boolean (*decode_mcu) (j_decompress_ptr cinfo, JBLOCKROW *MCU_data);
/* This is here to share code between baseline and progressive decoders; */
/* other modules probably should not use it */
boolean insufficient_data; /* set TRUE after emitting warning */
};
/* Inverse DCT (also performs dequantization) */
typedef void (*inverse_DCT_method_ptr) (j_decompress_ptr cinfo,
jpeg_component_info *compptr,
JCOEFPTR coef_block,
JSAMPARRAY output_buf,
JDIMENSION output_col);
struct jpeg_inverse_dct {
void (*start_pass) (j_decompress_ptr cinfo);
/* It is useful to allow each component to have a separate IDCT method. */
inverse_DCT_method_ptr inverse_DCT[MAX_COMPONENTS];
};
/* Upsampling (note that upsampler must also call color converter) */
struct jpeg_upsampler {
void (*start_pass) (j_decompress_ptr cinfo);
void (*upsample) (j_decompress_ptr cinfo, JSAMPIMAGE input_buf,
JDIMENSION *in_row_group_ctr,
JDIMENSION in_row_groups_avail, JSAMPARRAY output_buf,
JDIMENSION *out_row_ctr, JDIMENSION out_rows_avail);
boolean need_context_rows; /* TRUE if need rows above & below */
};
/* Colorspace conversion */
struct jpeg_color_deconverter {
void (*start_pass) (j_decompress_ptr cinfo);
void (*color_convert) (j_decompress_ptr cinfo, JSAMPIMAGE input_buf,
JDIMENSION input_row, JSAMPARRAY output_buf,
int num_rows);
};
/* Color quantization or color precision reduction */
struct jpeg_color_quantizer {
void (*start_pass) (j_decompress_ptr cinfo, boolean is_pre_scan);
void (*color_quantize) (j_decompress_ptr cinfo, JSAMPARRAY input_buf,
JSAMPARRAY output_buf, int num_rows);
void (*finish_pass) (j_decompress_ptr cinfo);
void (*new_color_map) (j_decompress_ptr cinfo);
};
/* Miscellaneous useful macros */
#undef MAX
#define MAX(a,b) ((a) > (b) ? (a) : (b))
#undef MIN
#define MIN(a,b) ((a) < (b) ? (a) : (b))
/* We assume that right shift corresponds to signed division by 2 with
* rounding towards minus infinity. This is correct for typical "arithmetic
* shift" instructions that shift in copies of the sign bit. But some
* C compilers implement >> with an unsigned shift. For these machines you
* must define RIGHT_SHIFT_IS_UNSIGNED.
* RIGHT_SHIFT provides a proper signed right shift of a JLONG quantity.
* It is only applied with constant shift counts. SHIFT_TEMPS must be
* included in the variables of any routine using RIGHT_SHIFT.
*/
#ifdef RIGHT_SHIFT_IS_UNSIGNED
#define SHIFT_TEMPS JLONG shift_temp;
#define RIGHT_SHIFT(x,shft) \
((shift_temp = (x)) < 0 ? \
(shift_temp >> (shft)) | ((~((JLONG) 0)) << (32-(shft))) : \
(shift_temp >> (shft)))
#else
#define SHIFT_TEMPS
#define RIGHT_SHIFT(x,shft) ((x) >> (shft))
#endif
/* Compression module initialization routines */
EXTERN(void) jinit_compress_master (j_compress_ptr cinfo);
EXTERN(void) jinit_c_master_control (j_compress_ptr cinfo,
boolean transcode_only);
EXTERN(void) jinit_c_main_controller (j_compress_ptr cinfo,
boolean need_full_buffer);
EXTERN(void) jinit_c_prep_controller (j_compress_ptr cinfo,
boolean need_full_buffer);
EXTERN(void) jinit_c_coef_controller (j_compress_ptr cinfo,
boolean need_full_buffer);
EXTERN(void) jinit_color_converter (j_compress_ptr cinfo);
EXTERN(void) jinit_downsampler (j_compress_ptr cinfo);
EXTERN(void) jinit_forward_dct (j_compress_ptr cinfo);
EXTERN(void) jinit_huff_encoder (j_compress_ptr cinfo);
EXTERN(void) jinit_phuff_encoder (j_compress_ptr cinfo);
EXTERN(void) jinit_arith_encoder (j_compress_ptr cinfo);
EXTERN(void) jinit_marker_writer (j_compress_ptr cinfo);
/* Decompression module initialization routines */
EXTERN(void) jinit_master_decompress (j_decompress_ptr cinfo);
EXTERN(void) jinit_d_main_controller (j_decompress_ptr cinfo,
boolean need_full_buffer);
EXTERN(void) jinit_d_coef_controller (j_decompress_ptr cinfo,
boolean need_full_buffer);
EXTERN(void) jinit_d_post_controller (j_decompress_ptr cinfo,
boolean need_full_buffer);
EXTERN(void) jinit_input_controller (j_decompress_ptr cinfo);
EXTERN(void) jinit_marker_reader (j_decompress_ptr cinfo);
EXTERN(void) jinit_huff_decoder (j_decompress_ptr cinfo);
EXTERN(void) jinit_phuff_decoder (j_decompress_ptr cinfo);
EXTERN(void) jinit_arith_decoder (j_decompress_ptr cinfo);
EXTERN(void) jinit_inverse_dct (j_decompress_ptr cinfo);
EXTERN(void) jinit_upsampler (j_decompress_ptr cinfo);
EXTERN(void) jinit_color_deconverter (j_decompress_ptr cinfo);
EXTERN(void) jinit_1pass_quantizer (j_decompress_ptr cinfo);
EXTERN(void) jinit_2pass_quantizer (j_decompress_ptr cinfo);
EXTERN(void) jinit_merged_upsampler (j_decompress_ptr cinfo);
/* Memory manager initialization */
EXTERN(void) jinit_memory_mgr (j_common_ptr cinfo);
#if JPEG_LIB_VERSION >= 80 || defined(MEM_SRCDST_SUPPORTED)
EXTERN(void)
jpeg_mem_dest_internal (j_compress_ptr cinfo,
unsigned char **outbuffer, unsigned long *outsize, int pool_id);
#endif
/* Utility routines in jutils.c */
EXTERN(long) jdiv_round_up (long a, long b);
EXTERN(long) jround_up (long a, long b);
EXTERN(void) jcopy_sample_rows (JSAMPARRAY input_array, int source_row,
JSAMPARRAY output_array, int dest_row,
int num_rows, JDIMENSION num_cols);
EXTERN(void) jcopy_block_row (JBLOCKROW input_row, JBLOCKROW output_row,
JDIMENSION num_blocks);
EXTERN(void) jzero_far (void *target, size_t bytestozero);
#ifdef C_ARITH_CODING_SUPPORTED
EXTERN(void) jget_arith_rates (j_compress_ptr cinfo, int dc_tbl_no, int ac_tbl_no, arith_rates *r);
EXTERN(void) quantize_trellis_arith
(j_compress_ptr cinfo, arith_rates *r, JBLOCKROW coef_blocks, JBLOCKROW src, JDIMENSION num_blocks,
JQUANT_TBL * qtbl, double *norm_src, double *norm_coef, JCOEF *last_dc_val,
JBLOCKROW coef_blocks_above, JBLOCKROW src_above);
#endif
/* Constant tables in jutils.c */
#if 0 /* This table is not actually needed in v6a */
extern const int jpeg_zigzag_order[]; /* natural coef order to zigzag order */
#endif
extern const int jpeg_natural_order[]; /* zigzag coef order to natural order */
/* Arithmetic coding probability estimation tables in jaricom.c */
extern const JLONG jpeg_aritab[];
/* Suppress undefined-structure complaints if necessary. */
#ifdef INCOMPLETE_TYPES_BROKEN
#ifndef AM_MEMORY_MANAGER /* only jmemmgr.c defines these */
struct jvirt_sarray_control { long dummy; };
struct jvirt_barray_control { long dummy; };
#endif
#endif /* INCOMPLETE_TYPES_BROKEN */
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