1bc79e0680a45d1ca330d690dae0340c8e17ab5e3Thomas G. Lane/* 2bc79e0680a45d1ca330d690dae0340c8e17ab5e3Thomas G. Lane * jcapimin.c 3bc79e0680a45d1ca330d690dae0340c8e17ab5e3Thomas G. Lane * 45033f3e19a31e8ad40c1a79700365aefe5664494DRC * This file was part of the Independent JPEG Group's software: 55ead57a34a398aa798f35bd7a6abad19b2e453e2Thomas G. Lane * Copyright (C) 1994-1998, Thomas G. Lane. 6f18f81b7e20cf993786a3348960ab2428762deeeGuido Vollbeding * Modified 2003-2010 by Guido Vollbeding. 75033f3e19a31e8ad40c1a79700365aefe5664494DRC * It was modified by The libjpeg-turbo Project to include only code relevant 85033f3e19a31e8ad40c1a79700365aefe5664494DRC * to libjpeg-turbo. 96eb7d3798b5a79347c62825fc4c16f7ce673bdd0Alex Naidis * For conditions of distribution and use, see the accompanying README.ijg 106eb7d3798b5a79347c62825fc4c16f7ce673bdd0Alex Naidis * file. 11bc79e0680a45d1ca330d690dae0340c8e17ab5e3Thomas G. Lane * 12bc79e0680a45d1ca330d690dae0340c8e17ab5e3Thomas G. Lane * This file contains application interface code for the compression half 13bc79e0680a45d1ca330d690dae0340c8e17ab5e3Thomas G. Lane * of the JPEG library. These are the "minimum" API routines that may be 14bc79e0680a45d1ca330d690dae0340c8e17ab5e3Thomas G. Lane * needed in either the normal full-compression case or the transcoding-only 15bc79e0680a45d1ca330d690dae0340c8e17ab5e3Thomas G. Lane * case. 16bc79e0680a45d1ca330d690dae0340c8e17ab5e3Thomas G. Lane * 17bc79e0680a45d1ca330d690dae0340c8e17ab5e3Thomas G. Lane * Most of the routines intended to be called directly by an application 18bc79e0680a45d1ca330d690dae0340c8e17ab5e3Thomas G. Lane * are in this file or in jcapistd.c. But also see jcparam.c for 19bc79e0680a45d1ca330d690dae0340c8e17ab5e3Thomas G. Lane * parameter-setup helper routines, jcomapi.c for routines shared by 20bc79e0680a45d1ca330d690dae0340c8e17ab5e3Thomas G. Lane * compression and decompression, and jctrans.c for the transcoding case. 21bc79e0680a45d1ca330d690dae0340c8e17ab5e3Thomas G. Lane */ 22bc79e0680a45d1ca330d690dae0340c8e17ab5e3Thomas G. Lane 23bc79e0680a45d1ca330d690dae0340c8e17ab5e3Thomas G. Lane#define JPEG_INTERNALS 24bc79e0680a45d1ca330d690dae0340c8e17ab5e3Thomas G. Lane#include "jinclude.h" 25bc79e0680a45d1ca330d690dae0340c8e17ab5e3Thomas G. Lane#include "jpeglib.h" 26bc79e0680a45d1ca330d690dae0340c8e17ab5e3Thomas G. Lane 27bc79e0680a45d1ca330d690dae0340c8e17ab5e3Thomas G. Lane 28bc79e0680a45d1ca330d690dae0340c8e17ab5e3Thomas G. Lane/* 29bc79e0680a45d1ca330d690dae0340c8e17ab5e3Thomas G. Lane * Initialization of a JPEG compression object. 30bc79e0680a45d1ca330d690dae0340c8e17ab5e3Thomas G. Lane * The error manager must already be set up (in case memory manager fails). 31bc79e0680a45d1ca330d690dae0340c8e17ab5e3Thomas G. Lane */ 32bc79e0680a45d1ca330d690dae0340c8e17ab5e3Thomas G. Lane 33489583f5165e05d37302e8eeec58104ea0109127Thomas G. LaneGLOBAL(void) 34489583f5165e05d37302e8eeec58104ea0109127Thomas G. Lanejpeg_CreateCompress (j_compress_ptr cinfo, int version, size_t structsize) 35bc79e0680a45d1ca330d690dae0340c8e17ab5e3Thomas G. Lane{ 36bc79e0680a45d1ca330d690dae0340c8e17ab5e3Thomas G. Lane int i; 37bc79e0680a45d1ca330d690dae0340c8e17ab5e3Thomas G. Lane 38489583f5165e05d37302e8eeec58104ea0109127Thomas G. Lane /* Guard against version mismatches between library and caller. */ 39e5eaf37440b8e337ab150c017df7c03faf846c51DRC cinfo->mem = NULL; /* so jpeg_destroy knows mem mgr not called */ 40489583f5165e05d37302e8eeec58104ea0109127Thomas G. Lane if (version != JPEG_LIB_VERSION) 41489583f5165e05d37302e8eeec58104ea0109127Thomas G. Lane ERREXIT2(cinfo, JERR_BAD_LIB_VERSION, JPEG_LIB_VERSION, version); 425de454b291f48382648a5d1dc2aa0fca8b5786d4DRC if (structsize != sizeof(struct jpeg_compress_struct)) 43e5eaf37440b8e337ab150c017df7c03faf846c51DRC ERREXIT2(cinfo, JERR_BAD_STRUCT_SIZE, 445de454b291f48382648a5d1dc2aa0fca8b5786d4DRC (int) sizeof(struct jpeg_compress_struct), (int) structsize); 45489583f5165e05d37302e8eeec58104ea0109127Thomas G. Lane 465ead57a34a398aa798f35bd7a6abad19b2e453e2Thomas G. Lane /* For debugging purposes, we zero the whole master structure. 475ead57a34a398aa798f35bd7a6abad19b2e453e2Thomas G. Lane * But the application has already set the err pointer, and may have set 485ead57a34a398aa798f35bd7a6abad19b2e453e2Thomas G. Lane * client_data, so we have to save and restore those fields. 495ead57a34a398aa798f35bd7a6abad19b2e453e2Thomas G. Lane * Note: if application hasn't set client_data, tools like Purify may 505ead57a34a398aa798f35bd7a6abad19b2e453e2Thomas G. Lane * complain here. 51bc79e0680a45d1ca330d690dae0340c8e17ab5e3Thomas G. Lane */ 52bc79e0680a45d1ca330d690dae0340c8e17ab5e3Thomas G. Lane { 536eb7d3798b5a79347c62825fc4c16f7ce673bdd0Alex Naidis struct jpeg_error_mgr *err = cinfo->err; 546eb7d3798b5a79347c62825fc4c16f7ce673bdd0Alex Naidis void *client_data = cinfo->client_data; /* ignore Purify complaint here */ 555de454b291f48382648a5d1dc2aa0fca8b5786d4DRC MEMZERO(cinfo, sizeof(struct jpeg_compress_struct)); 56bc79e0680a45d1ca330d690dae0340c8e17ab5e3Thomas G. Lane cinfo->err = err; 575ead57a34a398aa798f35bd7a6abad19b2e453e2Thomas G. Lane cinfo->client_data = client_data; 58bc79e0680a45d1ca330d690dae0340c8e17ab5e3Thomas G. Lane } 59bc79e0680a45d1ca330d690dae0340c8e17ab5e3Thomas G. Lane cinfo->is_decompressor = FALSE; 60bc79e0680a45d1ca330d690dae0340c8e17ab5e3Thomas G. Lane 61bc79e0680a45d1ca330d690dae0340c8e17ab5e3Thomas G. Lane /* Initialize a memory manager instance for this object */ 62bc79e0680a45d1ca330d690dae0340c8e17ab5e3Thomas G. Lane jinit_memory_mgr((j_common_ptr) cinfo); 63bc79e0680a45d1ca330d690dae0340c8e17ab5e3Thomas G. Lane 64bc79e0680a45d1ca330d690dae0340c8e17ab5e3Thomas G. Lane /* Zero out pointers to permanent structures. */ 65bc79e0680a45d1ca330d690dae0340c8e17ab5e3Thomas G. Lane cinfo->progress = NULL; 66bc79e0680a45d1ca330d690dae0340c8e17ab5e3Thomas G. Lane cinfo->dest = NULL; 67bc79e0680a45d1ca330d690dae0340c8e17ab5e3Thomas G. Lane 68bc79e0680a45d1ca330d690dae0340c8e17ab5e3Thomas G. Lane cinfo->comp_info = NULL; 69bc79e0680a45d1ca330d690dae0340c8e17ab5e3Thomas G. Lane 705996a25e2f50d20d6a8f09830724035b49c3927bGuido Vollbeding for (i = 0; i < NUM_QUANT_TBLS; i++) { 71bc79e0680a45d1ca330d690dae0340c8e17ab5e3Thomas G. Lane cinfo->quant_tbl_ptrs[i] = NULL; 7236a6eec93250e390d1028b3372078810b4428eafDRC#if JPEG_LIB_VERSION >= 70 735996a25e2f50d20d6a8f09830724035b49c3927bGuido Vollbeding cinfo->q_scale_factor[i] = 100; 7436a6eec93250e390d1028b3372078810b4428eafDRC#endif 755996a25e2f50d20d6a8f09830724035b49c3927bGuido Vollbeding } 76bc79e0680a45d1ca330d690dae0340c8e17ab5e3Thomas G. Lane 77bc79e0680a45d1ca330d690dae0340c8e17ab5e3Thomas G. Lane for (i = 0; i < NUM_HUFF_TBLS; i++) { 78bc79e0680a45d1ca330d690dae0340c8e17ab5e3Thomas G. Lane cinfo->dc_huff_tbl_ptrs[i] = NULL; 79bc79e0680a45d1ca330d690dae0340c8e17ab5e3Thomas G. Lane cinfo->ac_huff_tbl_ptrs[i] = NULL; 80bc79e0680a45d1ca330d690dae0340c8e17ab5e3Thomas G. Lane } 81bc79e0680a45d1ca330d690dae0340c8e17ab5e3Thomas G. Lane 8236a6eec93250e390d1028b3372078810b4428eafDRC#if JPEG_LIB_VERSION >= 80 83f18f81b7e20cf993786a3348960ab2428762deeeGuido Vollbeding /* Must do it here for emit_dqt in case jpeg_write_tables is used */ 84f18f81b7e20cf993786a3348960ab2428762deeeGuido Vollbeding cinfo->block_size = DCTSIZE; 85f18f81b7e20cf993786a3348960ab2428762deeeGuido Vollbeding cinfo->natural_order = jpeg_natural_order; 86f18f81b7e20cf993786a3348960ab2428762deeeGuido Vollbeding cinfo->lim_Se = DCTSIZE2-1; 8736a6eec93250e390d1028b3372078810b4428eafDRC#endif 88f18f81b7e20cf993786a3348960ab2428762deeeGuido Vollbeding 895ead57a34a398aa798f35bd7a6abad19b2e453e2Thomas G. Lane cinfo->script_space = NULL; 905ead57a34a398aa798f35bd7a6abad19b2e453e2Thomas G. Lane 91e5eaf37440b8e337ab150c017df7c03faf846c51DRC cinfo->input_gamma = 1.0; /* in case application forgets */ 92bc79e0680a45d1ca330d690dae0340c8e17ab5e3Thomas G. Lane 93bc79e0680a45d1ca330d690dae0340c8e17ab5e3Thomas G. Lane /* OK, I'm ready */ 94bc79e0680a45d1ca330d690dae0340c8e17ab5e3Thomas G. Lane cinfo->global_state = CSTATE_START; 95bc79e0680a45d1ca330d690dae0340c8e17ab5e3Thomas G. Lane} 96bc79e0680a45d1ca330d690dae0340c8e17ab5e3Thomas G. Lane 97bc79e0680a45d1ca330d690dae0340c8e17ab5e3Thomas G. Lane 98bc79e0680a45d1ca330d690dae0340c8e17ab5e3Thomas G. Lane/* 99bc79e0680a45d1ca330d690dae0340c8e17ab5e3Thomas G. Lane * Destruction of a JPEG compression object 100bc79e0680a45d1ca330d690dae0340c8e17ab5e3Thomas G. Lane */ 101bc79e0680a45d1ca330d690dae0340c8e17ab5e3Thomas G. Lane 102489583f5165e05d37302e8eeec58104ea0109127Thomas G. LaneGLOBAL(void) 103bc79e0680a45d1ca330d690dae0340c8e17ab5e3Thomas G. Lanejpeg_destroy_compress (j_compress_ptr cinfo) 104bc79e0680a45d1ca330d690dae0340c8e17ab5e3Thomas G. Lane{ 105bc79e0680a45d1ca330d690dae0340c8e17ab5e3Thomas G. Lane jpeg_destroy((j_common_ptr) cinfo); /* use common routine */ 106bc79e0680a45d1ca330d690dae0340c8e17ab5e3Thomas G. Lane} 107bc79e0680a45d1ca330d690dae0340c8e17ab5e3Thomas G. Lane 108bc79e0680a45d1ca330d690dae0340c8e17ab5e3Thomas G. Lane 109bc79e0680a45d1ca330d690dae0340c8e17ab5e3Thomas G. Lane/* 110bc79e0680a45d1ca330d690dae0340c8e17ab5e3Thomas G. Lane * Abort processing of a JPEG compression operation, 111bc79e0680a45d1ca330d690dae0340c8e17ab5e3Thomas G. Lane * but don't destroy the object itself. 112bc79e0680a45d1ca330d690dae0340c8e17ab5e3Thomas G. Lane */ 113bc79e0680a45d1ca330d690dae0340c8e17ab5e3Thomas G. Lane 114489583f5165e05d37302e8eeec58104ea0109127Thomas G. LaneGLOBAL(void) 115bc79e0680a45d1ca330d690dae0340c8e17ab5e3Thomas G. Lanejpeg_abort_compress (j_compress_ptr cinfo) 116bc79e0680a45d1ca330d690dae0340c8e17ab5e3Thomas G. Lane{ 117bc79e0680a45d1ca330d690dae0340c8e17ab5e3Thomas G. Lane jpeg_abort((j_common_ptr) cinfo); /* use common routine */ 118bc79e0680a45d1ca330d690dae0340c8e17ab5e3Thomas G. Lane} 119bc79e0680a45d1ca330d690dae0340c8e17ab5e3Thomas G. Lane 120bc79e0680a45d1ca330d690dae0340c8e17ab5e3Thomas G. Lane 121bc79e0680a45d1ca330d690dae0340c8e17ab5e3Thomas G. Lane/* 122bc79e0680a45d1ca330d690dae0340c8e17ab5e3Thomas G. Lane * Forcibly suppress or un-suppress all quantization and Huffman tables. 123bc79e0680a45d1ca330d690dae0340c8e17ab5e3Thomas G. Lane * Marks all currently defined tables as already written (if suppress) 124bc79e0680a45d1ca330d690dae0340c8e17ab5e3Thomas G. Lane * or not written (if !suppress). This will control whether they get emitted 125bc79e0680a45d1ca330d690dae0340c8e17ab5e3Thomas G. Lane * by a subsequent jpeg_start_compress call. 126bc79e0680a45d1ca330d690dae0340c8e17ab5e3Thomas G. Lane * 127bc79e0680a45d1ca330d690dae0340c8e17ab5e3Thomas G. Lane * This routine is exported for use by applications that want to produce 128bc79e0680a45d1ca330d690dae0340c8e17ab5e3Thomas G. Lane * abbreviated JPEG datastreams. It logically belongs in jcparam.c, but 129bc79e0680a45d1ca330d690dae0340c8e17ab5e3Thomas G. Lane * since it is called by jpeg_start_compress, we put it here --- otherwise 130bc79e0680a45d1ca330d690dae0340c8e17ab5e3Thomas G. Lane * jcparam.o would be linked whether the application used it or not. 131bc79e0680a45d1ca330d690dae0340c8e17ab5e3Thomas G. Lane */ 132bc79e0680a45d1ca330d690dae0340c8e17ab5e3Thomas G. Lane 133489583f5165e05d37302e8eeec58104ea0109127Thomas G. LaneGLOBAL(void) 134bc79e0680a45d1ca330d690dae0340c8e17ab5e3Thomas G. Lanejpeg_suppress_tables (j_compress_ptr cinfo, boolean suppress) 135bc79e0680a45d1ca330d690dae0340c8e17ab5e3Thomas G. Lane{ 136bc79e0680a45d1ca330d690dae0340c8e17ab5e3Thomas G. Lane int i; 1376eb7d3798b5a79347c62825fc4c16f7ce673bdd0Alex Naidis JQUANT_TBL *qtbl; 1386eb7d3798b5a79347c62825fc4c16f7ce673bdd0Alex Naidis JHUFF_TBL *htbl; 139bc79e0680a45d1ca330d690dae0340c8e17ab5e3Thomas G. Lane 140bc79e0680a45d1ca330d690dae0340c8e17ab5e3Thomas G. Lane for (i = 0; i < NUM_QUANT_TBLS; i++) { 141bc79e0680a45d1ca330d690dae0340c8e17ab5e3Thomas G. Lane if ((qtbl = cinfo->quant_tbl_ptrs[i]) != NULL) 142bc79e0680a45d1ca330d690dae0340c8e17ab5e3Thomas G. Lane qtbl->sent_table = suppress; 143bc79e0680a45d1ca330d690dae0340c8e17ab5e3Thomas G. Lane } 144bc79e0680a45d1ca330d690dae0340c8e17ab5e3Thomas G. Lane 145bc79e0680a45d1ca330d690dae0340c8e17ab5e3Thomas G. Lane for (i = 0; i < NUM_HUFF_TBLS; i++) { 146bc79e0680a45d1ca330d690dae0340c8e17ab5e3Thomas G. Lane if ((htbl = cinfo->dc_huff_tbl_ptrs[i]) != NULL) 147bc79e0680a45d1ca330d690dae0340c8e17ab5e3Thomas G. Lane htbl->sent_table = suppress; 148bc79e0680a45d1ca330d690dae0340c8e17ab5e3Thomas G. Lane if ((htbl = cinfo->ac_huff_tbl_ptrs[i]) != NULL) 149bc79e0680a45d1ca330d690dae0340c8e17ab5e3Thomas G. Lane htbl->sent_table = suppress; 150bc79e0680a45d1ca330d690dae0340c8e17ab5e3Thomas G. Lane } 151bc79e0680a45d1ca330d690dae0340c8e17ab5e3Thomas G. Lane} 152bc79e0680a45d1ca330d690dae0340c8e17ab5e3Thomas G. Lane 153bc79e0680a45d1ca330d690dae0340c8e17ab5e3Thomas G. Lane 154bc79e0680a45d1ca330d690dae0340c8e17ab5e3Thomas G. Lane/* 155bc79e0680a45d1ca330d690dae0340c8e17ab5e3Thomas G. Lane * Finish JPEG compression. 156bc79e0680a45d1ca330d690dae0340c8e17ab5e3Thomas G. Lane * 157bc79e0680a45d1ca330d690dae0340c8e17ab5e3Thomas G. Lane * If a multipass operating mode was selected, this may do a great deal of 158bc79e0680a45d1ca330d690dae0340c8e17ab5e3Thomas G. Lane * work including most of the actual output. 159bc79e0680a45d1ca330d690dae0340c8e17ab5e3Thomas G. Lane */ 160bc79e0680a45d1ca330d690dae0340c8e17ab5e3Thomas G. Lane 161489583f5165e05d37302e8eeec58104ea0109127Thomas G. LaneGLOBAL(void) 162bc79e0680a45d1ca330d690dae0340c8e17ab5e3Thomas G. Lanejpeg_finish_compress (j_compress_ptr cinfo) 163bc79e0680a45d1ca330d690dae0340c8e17ab5e3Thomas G. Lane{ 164bc79e0680a45d1ca330d690dae0340c8e17ab5e3Thomas G. Lane JDIMENSION iMCU_row; 165bc79e0680a45d1ca330d690dae0340c8e17ab5e3Thomas G. Lane 166bc79e0680a45d1ca330d690dae0340c8e17ab5e3Thomas G. Lane if (cinfo->global_state == CSTATE_SCANNING || 167bc79e0680a45d1ca330d690dae0340c8e17ab5e3Thomas G. Lane cinfo->global_state == CSTATE_RAW_OK) { 168bc79e0680a45d1ca330d690dae0340c8e17ab5e3Thomas G. Lane /* Terminate first pass */ 169bc79e0680a45d1ca330d690dae0340c8e17ab5e3Thomas G. Lane if (cinfo->next_scanline < cinfo->image_height) 170bc79e0680a45d1ca330d690dae0340c8e17ab5e3Thomas G. Lane ERREXIT(cinfo, JERR_TOO_LITTLE_DATA); 171bc79e0680a45d1ca330d690dae0340c8e17ab5e3Thomas G. Lane (*cinfo->master->finish_pass) (cinfo); 172bc79e0680a45d1ca330d690dae0340c8e17ab5e3Thomas G. Lane } else if (cinfo->global_state != CSTATE_WRCOEFS) 173bc79e0680a45d1ca330d690dae0340c8e17ab5e3Thomas G. Lane ERREXIT1(cinfo, JERR_BAD_STATE, cinfo->global_state); 174bc79e0680a45d1ca330d690dae0340c8e17ab5e3Thomas G. Lane /* Perform any remaining passes */ 175bc79e0680a45d1ca330d690dae0340c8e17ab5e3Thomas G. Lane while (! cinfo->master->is_last_pass) { 176bc79e0680a45d1ca330d690dae0340c8e17ab5e3Thomas G. Lane (*cinfo->master->prepare_for_pass) (cinfo); 177bc79e0680a45d1ca330d690dae0340c8e17ab5e3Thomas G. Lane for (iMCU_row = 0; iMCU_row < cinfo->total_iMCU_rows; iMCU_row++) { 178bc79e0680a45d1ca330d690dae0340c8e17ab5e3Thomas G. Lane if (cinfo->progress != NULL) { 179e5eaf37440b8e337ab150c017df7c03faf846c51DRC cinfo->progress->pass_counter = (long) iMCU_row; 180e5eaf37440b8e337ab150c017df7c03faf846c51DRC cinfo->progress->pass_limit = (long) cinfo->total_iMCU_rows; 181e5eaf37440b8e337ab150c017df7c03faf846c51DRC (*cinfo->progress->progress_monitor) ((j_common_ptr) cinfo); 182bc79e0680a45d1ca330d690dae0340c8e17ab5e3Thomas G. Lane } 183bc79e0680a45d1ca330d690dae0340c8e17ab5e3Thomas G. Lane /* We bypass the main controller and invoke coef controller directly; 184bc79e0680a45d1ca330d690dae0340c8e17ab5e3Thomas G. Lane * all work is being done from the coefficient buffer. 185bc79e0680a45d1ca330d690dae0340c8e17ab5e3Thomas G. Lane */ 186bc79e0680a45d1ca330d690dae0340c8e17ab5e3Thomas G. Lane if (! (*cinfo->coef->compress_data) (cinfo, (JSAMPIMAGE) NULL)) 187e5eaf37440b8e337ab150c017df7c03faf846c51DRC ERREXIT(cinfo, JERR_CANT_SUSPEND); 188bc79e0680a45d1ca330d690dae0340c8e17ab5e3Thomas G. Lane } 189bc79e0680a45d1ca330d690dae0340c8e17ab5e3Thomas G. Lane (*cinfo->master->finish_pass) (cinfo); 190bc79e0680a45d1ca330d690dae0340c8e17ab5e3Thomas G. Lane } 191bc79e0680a45d1ca330d690dae0340c8e17ab5e3Thomas G. Lane /* Write EOI, do final cleanup */ 192bc79e0680a45d1ca330d690dae0340c8e17ab5e3Thomas G. Lane (*cinfo->marker->write_file_trailer) (cinfo); 193bc79e0680a45d1ca330d690dae0340c8e17ab5e3Thomas G. Lane (*cinfo->dest->term_destination) (cinfo); 194bc79e0680a45d1ca330d690dae0340c8e17ab5e3Thomas G. Lane /* We can use jpeg_abort to release memory and reset global_state */ 195bc79e0680a45d1ca330d690dae0340c8e17ab5e3Thomas G. Lane jpeg_abort((j_common_ptr) cinfo); 196bc79e0680a45d1ca330d690dae0340c8e17ab5e3Thomas G. Lane} 197bc79e0680a45d1ca330d690dae0340c8e17ab5e3Thomas G. Lane 198bc79e0680a45d1ca330d690dae0340c8e17ab5e3Thomas G. Lane 199bc79e0680a45d1ca330d690dae0340c8e17ab5e3Thomas G. Lane/* 200bc79e0680a45d1ca330d690dae0340c8e17ab5e3Thomas G. Lane * Write a special marker. 201bc79e0680a45d1ca330d690dae0340c8e17ab5e3Thomas G. Lane * This is only recommended for writing COM or APPn markers. 202bc79e0680a45d1ca330d690dae0340c8e17ab5e3Thomas G. Lane * Must be called after jpeg_start_compress() and before 203bc79e0680a45d1ca330d690dae0340c8e17ab5e3Thomas G. Lane * first call to jpeg_write_scanlines() or jpeg_write_raw_data(). 204bc79e0680a45d1ca330d690dae0340c8e17ab5e3Thomas G. Lane */ 205bc79e0680a45d1ca330d690dae0340c8e17ab5e3Thomas G. Lane 206489583f5165e05d37302e8eeec58104ea0109127Thomas G. LaneGLOBAL(void) 207bc79e0680a45d1ca330d690dae0340c8e17ab5e3Thomas G. Lanejpeg_write_marker (j_compress_ptr cinfo, int marker, 208e5eaf37440b8e337ab150c017df7c03faf846c51DRC const JOCTET *dataptr, unsigned int datalen) 209bc79e0680a45d1ca330d690dae0340c8e17ab5e3Thomas G. Lane{ 210bc56b754e1a6a1db9ccadf64d6dda8a74140e1a3DRC void (*write_marker_byte) (j_compress_ptr info, int val); 2115ead57a34a398aa798f35bd7a6abad19b2e453e2Thomas G. Lane 2125ead57a34a398aa798f35bd7a6abad19b2e453e2Thomas G. Lane if (cinfo->next_scanline != 0 || 2135ead57a34a398aa798f35bd7a6abad19b2e453e2Thomas G. Lane (cinfo->global_state != CSTATE_SCANNING && 2145ead57a34a398aa798f35bd7a6abad19b2e453e2Thomas G. Lane cinfo->global_state != CSTATE_RAW_OK && 2155ead57a34a398aa798f35bd7a6abad19b2e453e2Thomas G. Lane cinfo->global_state != CSTATE_WRCOEFS)) 2165ead57a34a398aa798f35bd7a6abad19b2e453e2Thomas G. Lane ERREXIT1(cinfo, JERR_BAD_STATE, cinfo->global_state); 2175ead57a34a398aa798f35bd7a6abad19b2e453e2Thomas G. Lane 2185ead57a34a398aa798f35bd7a6abad19b2e453e2Thomas G. Lane (*cinfo->marker->write_marker_header) (cinfo, marker, datalen); 219e5eaf37440b8e337ab150c017df7c03faf846c51DRC write_marker_byte = cinfo->marker->write_marker_byte; /* copy for speed */ 2205ead57a34a398aa798f35bd7a6abad19b2e453e2Thomas G. Lane while (datalen--) { 2215ead57a34a398aa798f35bd7a6abad19b2e453e2Thomas G. Lane (*write_marker_byte) (cinfo, *dataptr); 2225ead57a34a398aa798f35bd7a6abad19b2e453e2Thomas G. Lane dataptr++; 2235ead57a34a398aa798f35bd7a6abad19b2e453e2Thomas G. Lane } 2245ead57a34a398aa798f35bd7a6abad19b2e453e2Thomas G. Lane} 2255ead57a34a398aa798f35bd7a6abad19b2e453e2Thomas G. Lane 2265ead57a34a398aa798f35bd7a6abad19b2e453e2Thomas G. Lane/* Same, but piecemeal. */ 2275ead57a34a398aa798f35bd7a6abad19b2e453e2Thomas G. Lane 2285ead57a34a398aa798f35bd7a6abad19b2e453e2Thomas G. LaneGLOBAL(void) 2295ead57a34a398aa798f35bd7a6abad19b2e453e2Thomas G. Lanejpeg_write_m_header (j_compress_ptr cinfo, int marker, unsigned int datalen) 2305ead57a34a398aa798f35bd7a6abad19b2e453e2Thomas G. Lane{ 231bc79e0680a45d1ca330d690dae0340c8e17ab5e3Thomas G. Lane if (cinfo->next_scanline != 0 || 232bc79e0680a45d1ca330d690dae0340c8e17ab5e3Thomas G. Lane (cinfo->global_state != CSTATE_SCANNING && 233bc79e0680a45d1ca330d690dae0340c8e17ab5e3Thomas G. Lane cinfo->global_state != CSTATE_RAW_OK && 234bc79e0680a45d1ca330d690dae0340c8e17ab5e3Thomas G. Lane cinfo->global_state != CSTATE_WRCOEFS)) 235bc79e0680a45d1ca330d690dae0340c8e17ab5e3Thomas G. Lane ERREXIT1(cinfo, JERR_BAD_STATE, cinfo->global_state); 236bc79e0680a45d1ca330d690dae0340c8e17ab5e3Thomas G. Lane 2375ead57a34a398aa798f35bd7a6abad19b2e453e2Thomas G. Lane (*cinfo->marker->write_marker_header) (cinfo, marker, datalen); 2385ead57a34a398aa798f35bd7a6abad19b2e453e2Thomas G. Lane} 2395ead57a34a398aa798f35bd7a6abad19b2e453e2Thomas G. Lane 2405ead57a34a398aa798f35bd7a6abad19b2e453e2Thomas G. LaneGLOBAL(void) 2415ead57a34a398aa798f35bd7a6abad19b2e453e2Thomas G. Lanejpeg_write_m_byte (j_compress_ptr cinfo, int val) 2425ead57a34a398aa798f35bd7a6abad19b2e453e2Thomas G. Lane{ 2435ead57a34a398aa798f35bd7a6abad19b2e453e2Thomas G. Lane (*cinfo->marker->write_marker_byte) (cinfo, val); 244bc79e0680a45d1ca330d690dae0340c8e17ab5e3Thomas G. Lane} 245bc79e0680a45d1ca330d690dae0340c8e17ab5e3Thomas G. Lane 246bc79e0680a45d1ca330d690dae0340c8e17ab5e3Thomas G. Lane 247bc79e0680a45d1ca330d690dae0340c8e17ab5e3Thomas G. Lane/* 248bc79e0680a45d1ca330d690dae0340c8e17ab5e3Thomas G. Lane * Alternate compression function: just write an abbreviated table file. 249bc79e0680a45d1ca330d690dae0340c8e17ab5e3Thomas G. Lane * Before calling this, all parameters and a data destination must be set up. 250bc79e0680a45d1ca330d690dae0340c8e17ab5e3Thomas G. Lane * 251bc79e0680a45d1ca330d690dae0340c8e17ab5e3Thomas G. Lane * To produce a pair of files containing abbreviated tables and abbreviated 252bc79e0680a45d1ca330d690dae0340c8e17ab5e3Thomas G. Lane * image data, one would proceed as follows: 253bc79e0680a45d1ca330d690dae0340c8e17ab5e3Thomas G. Lane * 254e5eaf37440b8e337ab150c017df7c03faf846c51DRC * initialize JPEG object 255e5eaf37440b8e337ab150c017df7c03faf846c51DRC * set JPEG parameters 256e5eaf37440b8e337ab150c017df7c03faf846c51DRC * set destination to table file 257e5eaf37440b8e337ab150c017df7c03faf846c51DRC * jpeg_write_tables(cinfo); 258e5eaf37440b8e337ab150c017df7c03faf846c51DRC * set destination to image file 259e5eaf37440b8e337ab150c017df7c03faf846c51DRC * jpeg_start_compress(cinfo, FALSE); 260e5eaf37440b8e337ab150c017df7c03faf846c51DRC * write data... 261e5eaf37440b8e337ab150c017df7c03faf846c51DRC * jpeg_finish_compress(cinfo); 262bc79e0680a45d1ca330d690dae0340c8e17ab5e3Thomas G. Lane * 263bc79e0680a45d1ca330d690dae0340c8e17ab5e3Thomas G. Lane * jpeg_write_tables has the side effect of marking all tables written 264bc79e0680a45d1ca330d690dae0340c8e17ab5e3Thomas G. Lane * (same as jpeg_suppress_tables(..., TRUE)). Thus a subsequent start_compress 265bc79e0680a45d1ca330d690dae0340c8e17ab5e3Thomas G. Lane * will not re-emit the tables unless it is passed write_all_tables=TRUE. 266bc79e0680a45d1ca330d690dae0340c8e17ab5e3Thomas G. Lane */ 267bc79e0680a45d1ca330d690dae0340c8e17ab5e3Thomas G. Lane 268489583f5165e05d37302e8eeec58104ea0109127Thomas G. LaneGLOBAL(void) 269bc79e0680a45d1ca330d690dae0340c8e17ab5e3Thomas G. Lanejpeg_write_tables (j_compress_ptr cinfo) 270bc79e0680a45d1ca330d690dae0340c8e17ab5e3Thomas G. Lane{ 271bc79e0680a45d1ca330d690dae0340c8e17ab5e3Thomas G. Lane if (cinfo->global_state != CSTATE_START) 272bc79e0680a45d1ca330d690dae0340c8e17ab5e3Thomas G. Lane ERREXIT1(cinfo, JERR_BAD_STATE, cinfo->global_state); 273bc79e0680a45d1ca330d690dae0340c8e17ab5e3Thomas G. Lane 274bc79e0680a45d1ca330d690dae0340c8e17ab5e3Thomas G. Lane /* (Re)initialize error mgr and destination modules */ 275bc79e0680a45d1ca330d690dae0340c8e17ab5e3Thomas G. Lane (*cinfo->err->reset_error_mgr) ((j_common_ptr) cinfo); 276bc79e0680a45d1ca330d690dae0340c8e17ab5e3Thomas G. Lane (*cinfo->dest->init_destination) (cinfo); 277bc79e0680a45d1ca330d690dae0340c8e17ab5e3Thomas G. Lane /* Initialize the marker writer ... bit of a crock to do it here. */ 278bc79e0680a45d1ca330d690dae0340c8e17ab5e3Thomas G. Lane jinit_marker_writer(cinfo); 279bc79e0680a45d1ca330d690dae0340c8e17ab5e3Thomas G. Lane /* Write them tables! */ 280bc79e0680a45d1ca330d690dae0340c8e17ab5e3Thomas G. Lane (*cinfo->marker->write_tables_only) (cinfo); 281bc79e0680a45d1ca330d690dae0340c8e17ab5e3Thomas G. Lane /* And clean up. */ 282bc79e0680a45d1ca330d690dae0340c8e17ab5e3Thomas G. Lane (*cinfo->dest->term_destination) (cinfo); 2835ead57a34a398aa798f35bd7a6abad19b2e453e2Thomas G. Lane /* 2845ead57a34a398aa798f35bd7a6abad19b2e453e2Thomas G. Lane * In library releases up through v6a, we called jpeg_abort() here to free 2855ead57a34a398aa798f35bd7a6abad19b2e453e2Thomas G. Lane * any working memory allocated by the destination manager and marker 2865ead57a34a398aa798f35bd7a6abad19b2e453e2Thomas G. Lane * writer. Some applications had a problem with that: they allocated space 2875ead57a34a398aa798f35bd7a6abad19b2e453e2Thomas G. Lane * of their own from the library memory manager, and didn't want it to go 2885ead57a34a398aa798f35bd7a6abad19b2e453e2Thomas G. Lane * away during write_tables. So now we do nothing. This will cause a 2895ead57a34a398aa798f35bd7a6abad19b2e453e2Thomas G. Lane * memory leak if an app calls write_tables repeatedly without doing a full 2905ead57a34a398aa798f35bd7a6abad19b2e453e2Thomas G. Lane * compression cycle or otherwise resetting the JPEG object. However, that 2915ead57a34a398aa798f35bd7a6abad19b2e453e2Thomas G. Lane * seems less bad than unexpectedly freeing memory in the normal case. 2925ead57a34a398aa798f35bd7a6abad19b2e453e2Thomas G. Lane * An app that prefers the old behavior can call jpeg_abort for itself after 2935ead57a34a398aa798f35bd7a6abad19b2e453e2Thomas G. Lane * each call to jpeg_write_tables(). 2945ead57a34a398aa798f35bd7a6abad19b2e453e2Thomas G. Lane */ 295bc79e0680a45d1ca330d690dae0340c8e17ab5e3Thomas G. Lane} 296