The Tor Browser: comparison media/libjpeg/jcapimin.c

--1:000000000000
+:15a0b080c9c9
+/*
+* jcapimin.c
+*
+* Copyright (C) 1994-1998, Thomas G. Lane.
+* Modified 2003-2010 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.
+*
+* This file contains application interface code for the compression half
+* of the JPEG library.  These are the "minimum" API routines that may be
+* needed in either the normal full-compression case or the transcoding-only
+* case.
+*
+* Most of the routines intended to be called directly by an application
+* are in this file or in jcapistd.c.  But also see jcparam.c for
+* parameter-setup helper routines, jcomapi.c for routines shared by
+* compression and decompression, and jctrans.c for the transcoding case.
+*/
+#define JPEG_INTERNALS
+#include "jinclude.h"
+#include "jpeglib.h"
+/*
+* Initialization of a JPEG compression object.
+* The error manager must already be set up (in case memory manager fails).
+*/
+GLOBAL(void)
+jpeg_CreateCompress (j_compress_ptr cinfo, int version, size_t structsize)
+{
+int i;
+/* Guard against version mismatches between library and caller. */
+cinfo->mem = NULL;		/* so jpeg_destroy knows mem mgr not called */
+if (version != JPEG_LIB_VERSION)
+ERREXIT2(cinfo, JERR_BAD_LIB_VERSION, JPEG_LIB_VERSION, version);
+if (structsize != SIZEOF(struct jpeg_compress_struct))
+ERREXIT2(cinfo, JERR_BAD_STRUCT_SIZE,
+	     (int) SIZEOF(struct jpeg_compress_struct), (int) structsize);
+/* For debugging purposes, we zero the whole master structure.
+* But the application has already set the err pointer, and may have set
+* client_data, so we have to save and restore those fields.
+* Note: if application hasn't set client_data, tools like Purify may
+* complain here.
+*/
+{
+struct jpeg_error_mgr * err = cinfo->err;
+void * client_data = cinfo->client_data; /* ignore Purify complaint here */
+MEMZERO(cinfo, SIZEOF(struct jpeg_compress_struct));
+cinfo->err = err;
+cinfo->client_data = client_data;
+}
+cinfo->is_decompressor = FALSE;
+/* Initialize a memory manager instance for this object */
+jinit_memory_mgr((j_common_ptr) cinfo);
+/* Zero out pointers to permanent structures. */
+cinfo->progress = NULL;
+cinfo->dest = NULL;
+cinfo->comp_info = NULL;
+for (i = 0; i < NUM_QUANT_TBLS; i++) {
+cinfo->quant_tbl_ptrs[i] = NULL;
+#if JPEG_LIB_VERSION >= 70
+cinfo->q_scale_factor[i] = 100;
+#endif
+}
+for (i = 0; i < NUM_HUFF_TBLS; i++) {
+cinfo->dc_huff_tbl_ptrs[i] = NULL;
+cinfo->ac_huff_tbl_ptrs[i] = NULL;
+}
+#if JPEG_LIB_VERSION >= 80
+/* Must do it here for emit_dqt in case jpeg_write_tables is used */
+cinfo->block_size = DCTSIZE;
+cinfo->natural_order = jpeg_natural_order;
+cinfo->lim_Se = DCTSIZE2-1;
+#endif
+cinfo->script_space = NULL;
+cinfo->input_gamma = 1.0;	/* in case application forgets */
+/* OK, I'm ready */
+cinfo->global_state = CSTATE_START;
+}
+/*
+* Destruction of a JPEG compression object
+*/
+GLOBAL(void)
+jpeg_destroy_compress (j_compress_ptr cinfo)
+{
+jpeg_destroy((j_common_ptr) cinfo); /* use common routine */
+}
+/*
+* Abort processing of a JPEG compression operation,
+* but don't destroy the object itself.
+*/
+GLOBAL(void)
+jpeg_abort_compress (j_compress_ptr cinfo)
+{
+jpeg_abort((j_common_ptr) cinfo); /* use common routine */
+}
+/*
+* Forcibly suppress or un-suppress all quantization and Huffman tables.
+* Marks all currently defined tables as already written (if suppress)
+* or not written (if !suppress).  This will control whether they get emitted
+* by a subsequent jpeg_start_compress call.
+*
+* This routine is exported for use by applications that want to produce
+* abbreviated JPEG datastreams.  It logically belongs in jcparam.c, but
+* since it is called by jpeg_start_compress, we put it here --- otherwise
+* jcparam.o would be linked whether the application used it or not.
+*/
+GLOBAL(void)
+jpeg_suppress_tables (j_compress_ptr cinfo, boolean suppress)
+{
+int i;
+JQUANT_TBL * qtbl;
+JHUFF_TBL * htbl;
+for (i = 0; i < NUM_QUANT_TBLS; i++) {
+if ((qtbl = cinfo->quant_tbl_ptrs[i]) != NULL)
+qtbl->sent_table = suppress;
+}
+for (i = 0; i < NUM_HUFF_TBLS; i++) {
+if ((htbl = cinfo->dc_huff_tbl_ptrs[i]) != NULL)
+htbl->sent_table = suppress;
+if ((htbl = cinfo->ac_huff_tbl_ptrs[i]) != NULL)
+htbl->sent_table = suppress;
+}
+}
+/*
+* Finish JPEG compression.
+*
+* If a multipass operating mode was selected, this may do a great deal of
+* work including most of the actual output.
+*/
+GLOBAL(void)
+jpeg_finish_compress (j_compress_ptr cinfo)
+{
+JDIMENSION iMCU_row;
+if (cinfo->global_state == CSTATE_SCANNING ||
+cinfo->global_state == CSTATE_RAW_OK) {
+/* Terminate first pass */
+if (cinfo->next_scanline < cinfo->image_height)
+ERREXIT(cinfo, JERR_TOO_LITTLE_DATA);
+(*cinfo->master->finish_pass) (cinfo);
+} else if (cinfo->global_state != CSTATE_WRCOEFS)
+ERREXIT1(cinfo, JERR_BAD_STATE, cinfo->global_state);
+/* Perform any remaining passes */
+while (! cinfo->master->is_last_pass) {
+(*cinfo->master->prepare_for_pass) (cinfo);
+for (iMCU_row = 0; iMCU_row < cinfo->total_iMCU_rows; iMCU_row++) {
+if (cinfo->progress != NULL) {
+	cinfo->progress->pass_counter = (long) iMCU_row;
+	cinfo->progress->pass_limit = (long) cinfo->total_iMCU_rows;
+	(*cinfo->progress->progress_monitor) ((j_common_ptr) cinfo);
+}
+/* We bypass the main controller and invoke coef controller directly;
+* all work is being done from the coefficient buffer.
+*/
+if (! (*cinfo->coef->compress_data) (cinfo, (JSAMPIMAGE) NULL))
+	ERREXIT(cinfo, JERR_CANT_SUSPEND);
+}
+(*cinfo->master->finish_pass) (cinfo);
+}
+/* Write EOI, do final cleanup */
+(*cinfo->marker->write_file_trailer) (cinfo);
+(*cinfo->dest->term_destination) (cinfo);
+/* We can use jpeg_abort to release memory and reset global_state */
+jpeg_abort((j_common_ptr) cinfo);
+}
+/*
+* Write a special marker.
+* This is only recommended for writing COM or APPn markers.
+* Must be called after jpeg_start_compress() and before
+* first call to jpeg_write_scanlines() or jpeg_write_raw_data().
+*/
+GLOBAL(void)
+jpeg_write_marker (j_compress_ptr cinfo, int marker,
+		   const JOCTET *dataptr, unsigned int datalen)
+{
+JMETHOD(void, write_marker_byte, (j_compress_ptr info, int val));
+if (cinfo->next_scanline != 0 ||
+(cinfo->global_state != CSTATE_SCANNING &&
+cinfo->global_state != CSTATE_RAW_OK &&
+cinfo->global_state != CSTATE_WRCOEFS))
+ERREXIT1(cinfo, JERR_BAD_STATE, cinfo->global_state);
+(*cinfo->marker->write_marker_header) (cinfo, marker, datalen);
+write_marker_byte = cinfo->marker->write_marker_byte;	/* copy for speed */
+while (datalen--) {
+(*write_marker_byte) (cinfo, *dataptr);
+dataptr++;
+}
+}
+/* Same, but piecemeal. */
+GLOBAL(void)
+jpeg_write_m_header (j_compress_ptr cinfo, int marker, unsigned int datalen)
+{
+if (cinfo->next_scanline != 0 ||
+(cinfo->global_state != CSTATE_SCANNING &&
+cinfo->global_state != CSTATE_RAW_OK &&
+cinfo->global_state != CSTATE_WRCOEFS))
+ERREXIT1(cinfo, JERR_BAD_STATE, cinfo->global_state);
+(*cinfo->marker->write_marker_header) (cinfo, marker, datalen);
+}
+GLOBAL(void)
+jpeg_write_m_byte (j_compress_ptr cinfo, int val)
+{
+(*cinfo->marker->write_marker_byte) (cinfo, val);
+}
+/*
+* Alternate compression function: just write an abbreviated table file.
+* Before calling this, all parameters and a data destination must be set up.
+*
+* To produce a pair of files containing abbreviated tables and abbreviated
+* image data, one would proceed as follows:
+*
+*		initialize JPEG object
+*		set JPEG parameters
+*		set destination to table file
+*		jpeg_write_tables(cinfo);
+*		set destination to image file
+*		jpeg_start_compress(cinfo, FALSE);
+*		write data...
+*		jpeg_finish_compress(cinfo);
+*
+* jpeg_write_tables has the side effect of marking all tables written
+* (same as jpeg_suppress_tables(..., TRUE)).  Thus a subsequent start_compress
+* will not re-emit the tables unless it is passed write_all_tables=TRUE.
+*/
+GLOBAL(void)
+jpeg_write_tables (j_compress_ptr cinfo)
+{
+if (cinfo->global_state != CSTATE_START)
+ERREXIT1(cinfo, JERR_BAD_STATE, cinfo->global_state);
+/* (Re)initialize error mgr and destination modules */
+(*cinfo->err->reset_error_mgr) ((j_common_ptr) cinfo);
+(*cinfo->dest->init_destination) (cinfo);
+/* Initialize the marker writer ... bit of a crock to do it here. */
+jinit_marker_writer(cinfo);
+/* Write them tables! */
+(*cinfo->marker->write_tables_only) (cinfo);
+/* And clean up. */
+(*cinfo->dest->term_destination) (cinfo);
+/*
+* In library releases up through v6a, we called jpeg_abort() here to free
+* any working memory allocated by the destination manager and marker
+* writer.  Some applications had a problem with that: they allocated space
+* of their own from the library memory manager, and didn't want it to go
+* away during write_tables.  So now we do nothing.  This will cause a
+* memory leak if an app calls write_tables repeatedly without doing a full
+* compression cycle or otherwise resetting the JPEG object.  However, that
+* seems less bad than unexpectedly freeing memory in the normal case.
+* An app that prefers the old behavior can call jpeg_abort for itself after
+* each call to jpeg_write_tables().
+*/
+}

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comparison: media/libjpeg/jcapimin.c

media/libjpeg/jcapimin.c