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- //-------------------------------------------------------------------------//
- // Windows Graphics Programming: Win32 GDI and DirectDraw //
- // ISBN 0-13-086985-6 //
- // //
- // Modified by: Yuan, Feng www.fengyuan.com //
- // Changes : C++, exception, in-memory source, BGR byte order //
- // Version : 1.00.000, May 31, 2000 //
- //-------------------------------------------------------------------------//
-
- /*
- * jpegint.h
- *
- * Copyright (C) 1991-1997, Thomas G. Lane.
- * This file is part of the Independent JPEG Group's software.
- * For conditions of distribution and use, see the accompanying README 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 */
- } 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 */
-
-
- /* Declarations for compression modules */
-
- /* Master control module */
- struct jpeg_comp_master {
- JMETHOD(void, prepare_for_pass, (j_compress_ptr cinfo));
- JMETHOD(void, pass_startup, (j_compress_ptr cinfo));
- JMETHOD(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 */
- };
-
- /* Main buffer control (downsampled-data buffer) */
- struct jpeg_c_main_controller {
- JMETHOD(void, start_pass, (j_compress_ptr cinfo, J_BUF_MODE pass_mode));
- JMETHOD(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 {
- JMETHOD(void, start_pass, (j_compress_ptr cinfo, J_BUF_MODE pass_mode));
- JMETHOD(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 {
- JMETHOD(void, start_pass, (j_compress_ptr cinfo, J_BUF_MODE pass_mode));
- JMETHOD(boolean, compress_data, (j_compress_ptr cinfo,
- JSAMPIMAGE input_buf));
- };
-
- /* Colorspace conversion */
- struct jpeg_color_converter {
- JMETHOD(void, start_pass, (j_compress_ptr cinfo));
- JMETHOD(void, color_convert, (j_compress_ptr cinfo,
- JSAMPARRAY input_buf, JSAMPIMAGE output_buf,
- JDIMENSION output_row, int num_rows));
- };
-
- /* Downsampling */
- struct jpeg_downsampler {
- JMETHOD(void, start_pass, (j_compress_ptr cinfo));
- JMETHOD(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 {
- JMETHOD(void, start_pass, (j_compress_ptr cinfo));
- /* perhaps this should be an array??? */
- JMETHOD(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));
- };
-
- /* Entropy encoding */
- struct jpeg_entropy_encoder {
- JMETHOD(void, start_pass, (j_compress_ptr cinfo, boolean gather_statistics));
- JMETHOD(boolean, encode_mcu, (j_compress_ptr cinfo, JBLOCKROW *MCU_data));
- JMETHOD(void, finish_pass, (j_compress_ptr cinfo));
- };
-
- /* Marker writing */
- struct jpeg_marker_writer {
- JMETHOD(void, write_file_header, (j_compress_ptr cinfo));
- JMETHOD(void, write_frame_header, (j_compress_ptr cinfo));
- JMETHOD(void, write_scan_header, (j_compress_ptr cinfo));
- JMETHOD(void, write_file_trailer, (j_compress_ptr cinfo));
- JMETHOD(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 */
- JMETHOD(void, write_marker_header, (j_compress_ptr cinfo, int marker,
- unsigned int datalen));
- JMETHOD(void, write_marker_byte, (j_compress_ptr cinfo, int val));
- };
-
-
- /* Declarations for decompression modules */
-
- /* Master control module */
- struct jpeg_decomp_master {
- JMETHOD(void, prepare_for_output_pass, (j_decompress_ptr cinfo));
- JMETHOD(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 */
- };
-
- /* Input control module */
- struct jpeg_input_controller {
- JMETHOD(int, consume_input, (j_decompress_ptr cinfo));
- JMETHOD(void, reset_input_controller, (j_decompress_ptr cinfo));
- JMETHOD(void, start_input_pass, (j_decompress_ptr cinfo));
- JMETHOD(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 {
- JMETHOD(void, start_pass, (j_decompress_ptr cinfo, J_BUF_MODE pass_mode));
- JMETHOD(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 {
- JMETHOD(void, start_input_pass, (j_decompress_ptr cinfo));
- JMETHOD(int, consume_data, (j_decompress_ptr cinfo));
- JMETHOD(void, start_output_pass, (j_decompress_ptr cinfo));
- JMETHOD(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 {
- JMETHOD(void, start_pass, (j_decompress_ptr cinfo, J_BUF_MODE pass_mode));
- JMETHOD(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 {
- JMETHOD(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.
- */
- JMETHOD(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 {
- JMETHOD(void, start_pass, (j_decompress_ptr cinfo));
- JMETHOD(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 JMETHOD(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 {
- JMETHOD(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 {
- JMETHOD(void, start_pass, (j_decompress_ptr cinfo));
- JMETHOD(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 {
- JMETHOD(void, start_pass, (j_decompress_ptr cinfo));
- JMETHOD(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 {
- JMETHOD(void, start_pass, (j_decompress_ptr cinfo, boolean is_pre_scan));
- JMETHOD(void, color_quantize, (j_decompress_ptr cinfo,
- JSAMPARRAY input_buf, JSAMPARRAY output_buf,
- int num_rows));
- JMETHOD(void, finish_pass, (j_decompress_ptr cinfo));
- JMETHOD(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 an INT32 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 INT32 shift_temp;
- #define RIGHT_SHIFT(x,shft) \
- ((shift_temp = (x)) < 0 ? \
- (shift_temp >> (shft)) | ((~((long) 0)) << (32-(shft))) : \
- (shift_temp >> (shft)))
- #else
- #define SHIFT_TEMPS
- #define RIGHT_SHIFT(x,shft) ((x) >> (shft))
- #endif
-
-
-
- /* Compression module initialization routines */
- void jinit_compress_master (j_compress_ptr cinfo);
- void jinit_c_master_control (j_compress_ptr cinfo, boolean transcode_only);
- void jinit_c_main_controller (j_compress_ptr cinfo, boolean need_full_buffer);
- void jinit_c_prep_controller (j_compress_ptr cinfo, boolean need_full_buffer);
- void jinit_c_coef_controller (j_compress_ptr cinfo, boolean need_full_buffer);
- void jinit_color_converter (j_compress_ptr cinfo);
- void jinit_downsampler (j_compress_ptr cinfo);
- void jinit_forward_dct (j_compress_ptr cinfo);
- void jinit_huff_encoder (j_compress_ptr cinfo);
- void jinit_phuff_encoder (j_compress_ptr cinfo);
- void jinit_marker_writer (j_compress_ptr cinfo);
- /* Decompression module initialization routines */
- void jinit_master_decompress (j_decompress_ptr cinfo);
- void jinit_d_main_controller (j_decompress_ptr cinfo,
- boolean need_full_buffer);
- void jinit_d_coef_controller (j_decompress_ptr cinfo,
- boolean need_full_buffer);
- void jinit_d_post_controller (j_decompress_ptr cinfo,
- boolean need_full_buffer);
- void jinit_input_controller (j_decompress_ptr cinfo);
- void jinit_marker_reader (j_decompress_ptr cinfo);
- void jinit_huff_decoder (j_decompress_ptr cinfo);
- void jinit_phuff_decoder (j_decompress_ptr cinfo);
- void jinit_inverse_dct (j_decompress_ptr cinfo);
- void jinit_upsampler (j_decompress_ptr cinfo);
- void jinit_color_deconverter (j_decompress_ptr cinfo);
- void jinit_1pass_quantizer (j_decompress_ptr cinfo);
- void jinit_2pass_quantizer (j_decompress_ptr cinfo);
- void jinit_merged_upsampler (j_decompress_ptr cinfo);
- /* Memory manager initialization */
- void jinit_memory_mgr (j_common_ptr cinfo);
-
- /* Utility routines in jutils.c */
- long jdiv_round_up (long a, long b);
- long jround_up (long a, long b);
- void jcopy_sample_rows (JSAMPARRAY input_array, int source_row,
- JSAMPARRAY output_array, int dest_row,
- int num_rows, JDIMENSION num_cols);
- void jcopy_block_row (JBLOCKROW input_row, JBLOCKROW output_row,
- JDIMENSION num_blocks);
-
- #define jzero_far(target, bytestozero) memset(target, 0, bytestozero)
-
- /* 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 */
-
-