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author | Vladimir Chtchetkine <vchtchetkine@google.com> | 2012-01-31 16:21:06 -0800 |
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committer | Vladimir Chtchetkine <vchtchetkine@google.com> | 2012-02-01 07:03:32 -0800 |
commit | 70a18cd874a22452aca9e39e22275ed4538ed20b (patch) | |
tree | f67e6501f8d1195147a57a93230ed61fe7525b2a /distrib/jpeg-6b/jcomapi.c | |
parent | 34f234393256163101b05c41ee4676bc68b57c65 (diff) | |
download | external_qemu-70a18cd874a22452aca9e39e22275ed4538ed20b.zip external_qemu-70a18cd874a22452aca9e39e22275ed4538ed20b.tar.gz external_qemu-70a18cd874a22452aca9e39e22275ed4538ed20b.tar.bz2 |
Include JPEG compression / decompression library into emulator build
We are going to need JPEG compression for transferring emulator's framebuffers to
the multi-touch supporting application running on an android device. The source
for JPEG compressor has been copied over from external/jpeg
To that I've added distrib/jpeg-6b/sources.make containing build instruction for
JPEG compressor. That file gets included into Makefile.common to compile JPEG
compressor sources along with the emulator sources.
Change-Id: I7bfccb7a10f873f90edabab5d3b1b2ca4dd57449
Diffstat (limited to 'distrib/jpeg-6b/jcomapi.c')
-rw-r--r-- | distrib/jpeg-6b/jcomapi.c | 106 |
1 files changed, 106 insertions, 0 deletions
diff --git a/distrib/jpeg-6b/jcomapi.c b/distrib/jpeg-6b/jcomapi.c new file mode 100644 index 0000000..9b1fa75 --- /dev/null +++ b/distrib/jpeg-6b/jcomapi.c @@ -0,0 +1,106 @@ +/* + * jcomapi.c + * + * Copyright (C) 1994-1997, 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 contains application interface routines that are used for both + * compression and decompression. + */ + +#define JPEG_INTERNALS +#include "jinclude.h" +#include "jpeglib.h" + + +/* + * Abort processing of a JPEG compression or decompression operation, + * but don't destroy the object itself. + * + * For this, we merely clean up all the nonpermanent memory pools. + * Note that temp files (virtual arrays) are not allowed to belong to + * the permanent pool, so we will be able to close all temp files here. + * Closing a data source or destination, if necessary, is the application's + * responsibility. + */ + +GLOBAL(void) +jpeg_abort (j_common_ptr cinfo) +{ + int pool; + + /* Do nothing if called on a not-initialized or destroyed JPEG object. */ + if (cinfo->mem == NULL) + return; + + /* Releasing pools in reverse order might help avoid fragmentation + * with some (brain-damaged) malloc libraries. + */ + for (pool = JPOOL_NUMPOOLS-1; pool > JPOOL_PERMANENT; pool--) { + (*cinfo->mem->free_pool) (cinfo, pool); + } + + /* Reset overall state for possible reuse of object */ + if (cinfo->is_decompressor) { + cinfo->global_state = DSTATE_START; + /* Try to keep application from accessing now-deleted marker list. + * A bit kludgy to do it here, but this is the most central place. + */ + ((j_decompress_ptr) cinfo)->marker_list = NULL; + } else { + cinfo->global_state = CSTATE_START; + } +} + + +/* + * Destruction of a JPEG object. + * + * Everything gets deallocated except the master jpeg_compress_struct itself + * and the error manager struct. Both of these are supplied by the application + * and must be freed, if necessary, by the application. (Often they are on + * the stack and so don't need to be freed anyway.) + * Closing a data source or destination, if necessary, is the application's + * responsibility. + */ + +GLOBAL(void) +jpeg_destroy (j_common_ptr cinfo) +{ + /* We need only tell the memory manager to release everything. */ + /* NB: mem pointer is NULL if memory mgr failed to initialize. */ + if (cinfo->mem != NULL) + (*cinfo->mem->self_destruct) (cinfo); + cinfo->mem = NULL; /* be safe if jpeg_destroy is called twice */ + cinfo->global_state = 0; /* mark it destroyed */ +} + + +/* + * Convenience routines for allocating quantization and Huffman tables. + * (Would jutils.c be a more reasonable place to put these?) + */ + +GLOBAL(JQUANT_TBL *) +jpeg_alloc_quant_table (j_common_ptr cinfo) +{ + JQUANT_TBL *tbl; + + tbl = (JQUANT_TBL *) + (*cinfo->mem->alloc_small) (cinfo, JPOOL_PERMANENT, SIZEOF(JQUANT_TBL)); + tbl->sent_table = FALSE; /* make sure this is false in any new table */ + return tbl; +} + + +GLOBAL(JHUFF_TBL *) +jpeg_alloc_huff_table (j_common_ptr cinfo) +{ + JHUFF_TBL *tbl; + + tbl = (JHUFF_TBL *) + (*cinfo->mem->alloc_small) (cinfo, JPOOL_PERMANENT, SIZEOF(JHUFF_TBL)); + tbl->sent_table = FALSE; /* make sure this is false in any new table */ + return tbl; +} |