diff options
Diffstat (limited to 'src/jpegint.h')
| -rw-r--r-- | src/jpegint.h | 114 |
1 files changed, 72 insertions, 42 deletions
diff --git a/src/jpegint.h b/src/jpegint.h index e55a2be..eb6ec8b 100644 --- a/src/jpegint.h +++ b/src/jpegint.h @@ -2,6 +2,7 @@ * jpegint.h * * Copyright (C) 1991-1997, Thomas G. Lane. + * Modified 1997-2009 by Guido Vollbeding. * This file is part of the Independent JPEG Group's software. * For conditions of distribution and use, see the accompanying README file. * @@ -10,6 +11,7 @@ * applications using the library shouldn't need to include this file. */ + /* Declarations for both compression & decompression */ typedef enum { /* Operating modes for buffer controllers */ @@ -37,6 +39,7 @@ typedef enum { /* Operating modes for buffer controllers */ #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 */ @@ -53,17 +56,19 @@ struct jpeg_comp_master { /* 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)); + 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)); + 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 */ @@ -76,29 +81,30 @@ struct jpeg_c_coef_controller { 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)); + 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)); + 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) */ +typedef JMETHOD(void, forward_DCT_ptr, + (j_compress_ptr cinfo, jpeg_component_info * compptr, + JSAMPARRAY sample_data, JBLOCKROW coef_blocks, + JDIMENSION start_row, JDIMENSION start_col, JDIMENSION num_blocks)); + 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)); + /* It is useful to allow each component to have a separate FDCT method. */ + forward_DCT_ptr forward_DCT[MAX_COMPONENTS]; }; /* Entropy encoding */ @@ -121,6 +127,7 @@ struct jpeg_marker_writer { JMETHOD(void, write_marker_byte, (j_compress_ptr cinfo, int val)); }; + /* Declarations for decompression modules */ /* Master control module */ @@ -147,8 +154,8 @@ struct jpeg_input_controller { /* 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)); + JMETHOD(void, process_data, (j_decompress_ptr cinfo, + JSAMPARRAY output_buf, JDIMENSION * out_row_ctr, JDIMENSION out_rows_avail)); }; /* Coefficient buffer control */ @@ -164,11 +171,11 @@ struct jpeg_d_coef_controller { /* 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)); + 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 */ @@ -195,10 +202,6 @@ struct jpeg_marker_reader { 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) */ @@ -228,19 +231,20 @@ struct jpeg_upsampler { 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)); + 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, 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 @@ -248,6 +252,7 @@ struct jpeg_color_quantizer { #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 @@ -269,6 +274,7 @@ struct jpeg_color_quantizer { #define RIGHT_SHIFT(x,shft) ((x) >> (shft)) #endif + /* Short forms of external names for systems with brain-damaged linkers. */ #ifdef NEED_SHORT_EXTERNAL_NAMES @@ -281,7 +287,7 @@ struct jpeg_color_quantizer { #define jinit_downsampler jIDownsampler #define jinit_forward_dct jIFDCT #define jinit_huff_encoder jIHEncoder -#define jinit_phuff_encoder jIPHEncoder +#define jinit_arith_encoder jIAEncoder #define jinit_marker_writer jIMWriter #define jinit_master_decompress jIDMaster #define jinit_d_main_controller jIDMainC @@ -290,7 +296,7 @@ struct jpeg_color_quantizer { #define jinit_input_controller jIInCtlr #define jinit_marker_reader jIMReader #define jinit_huff_decoder jIHDecoder -#define jinit_phuff_decoder jIPHDecoder +#define jinit_arith_decoder jIADecoder #define jinit_inverse_dct jIIDCT #define jinit_upsampler jIUpsampler #define jinit_color_deconverter jIDColor @@ -305,16 +311,27 @@ struct jpeg_color_quantizer { #define jzero_far jZeroFar #define jpeg_zigzag_order jZIGTable #define jpeg_natural_order jZAGTable +#define jpeg_natural_order7 jZAGTable7 +#define jpeg_natural_order6 jZAGTable6 +#define jpeg_natural_order5 jZAGTable5 +#define jpeg_natural_order4 jZAGTable4 +#define jpeg_natural_order3 jZAGTable3 +#define jpeg_natural_order2 jZAGTable2 +#define jpeg_aritab jAriTab #endif /* NEED_SHORT_EXTERNAL_NAMES */ + /* Compression module initialization routines */ EXTERN(void) jinit_compress_master JPP((j_compress_ptr cinfo)); EXTERN(void) jinit_c_master_control JPP((j_compress_ptr cinfo, boolean transcode_only)); -EXTERN(void) jinit_c_main_controller JPP((j_compress_ptr cinfo, boolean need_full_buffer)); -EXTERN(void) jinit_c_prep_controller JPP((j_compress_ptr cinfo, boolean need_full_buffer)); -EXTERN(void) jinit_c_coef_controller JPP((j_compress_ptr cinfo, boolean need_full_buffer)); +EXTERN(void) +jinit_c_main_controller JPP((j_compress_ptr cinfo, boolean need_full_buffer)); +EXTERN(void) +jinit_c_prep_controller JPP((j_compress_ptr cinfo, boolean need_full_buffer)); +EXTERN(void) +jinit_c_coef_controller JPP((j_compress_ptr cinfo, boolean need_full_buffer)); EXTERN(void) jinit_color_converter JPP((j_compress_ptr cinfo)); EXTERN(void) @@ -324,15 +341,18 @@ jinit_forward_dct JPP((j_compress_ptr cinfo)); EXTERN(void) jinit_huff_encoder JPP((j_compress_ptr cinfo)); EXTERN(void) -jinit_phuff_encoder JPP((j_compress_ptr cinfo)); +jinit_arith_encoder JPP((j_compress_ptr cinfo)); EXTERN(void) jinit_marker_writer JPP((j_compress_ptr cinfo)); /* Decompression module initialization routines */ EXTERN(void) jinit_master_decompress JPP((j_decompress_ptr cinfo)); -EXTERN(void) jinit_d_main_controller JPP((j_decompress_ptr cinfo, boolean need_full_buffer)); -EXTERN(void) jinit_d_coef_controller JPP((j_decompress_ptr cinfo, boolean need_full_buffer)); -EXTERN(void) jinit_d_post_controller JPP((j_decompress_ptr cinfo, boolean need_full_buffer)); +EXTERN(void) +jinit_d_main_controller JPP((j_decompress_ptr cinfo, boolean need_full_buffer)); +EXTERN(void) +jinit_d_coef_controller JPP((j_decompress_ptr cinfo, boolean need_full_buffer)); +EXTERN(void) +jinit_d_post_controller JPP((j_decompress_ptr cinfo, boolean need_full_buffer)); EXTERN(void) jinit_input_controller JPP((j_decompress_ptr cinfo)); EXTERN(void) @@ -340,7 +360,7 @@ jinit_marker_reader JPP((j_decompress_ptr cinfo)); EXTERN(void) jinit_huff_decoder JPP((j_decompress_ptr cinfo)); EXTERN(void) -jinit_phuff_decoder JPP((j_decompress_ptr cinfo)); +jinit_arith_decoder JPP((j_decompress_ptr cinfo)); EXTERN(void) jinit_inverse_dct JPP((j_decompress_ptr cinfo)); EXTERN(void) @@ -365,7 +385,8 @@ jround_up JPP((long a, long b)); EXTERN(void) jcopy_sample_rows JPP((JSAMPARRAY input_array, int source_row, JSAMPARRAY output_array, int dest_row, int num_rows, JDIMENSION num_cols)); -EXTERN(void) jcopy_block_row JPP((JBLOCKROW input_row, JBLOCKROW output_row, JDIMENSION num_blocks)); +EXTERN(void) +jcopy_block_row JPP((JBLOCKROW input_row, JBLOCKROW output_row, JDIMENSION num_blocks)); EXTERN(void) jzero_far JPP((void FAR * target, size_t bytestozero)); /* Constant tables in jutils.c */ @@ -373,6 +394,15 @@ jzero_far JPP((void FAR * target, size_t bytestozero)); 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 */ +extern const int jpeg_natural_order7[]; /* zz to natural order for 7x7 block */ +extern const int jpeg_natural_order6[]; /* zz to natural order for 6x6 block */ +extern const int jpeg_natural_order5[]; /* zz to natural order for 5x5 block */ +extern const int jpeg_natural_order4[]; /* zz to natural order for 4x4 block */ +extern const int jpeg_natural_order3[]; /* zz to natural order for 3x3 block */ +extern const int jpeg_natural_order2[]; /* zz to natural order for 2x2 block */ + +/* Arithmetic coding probability estimation tables in jaricom.c */ +extern const INT32 jpeg_aritab[]; /* Suppress undefined-structure complaints if necessary. */ |