jpeg_memory.h File Reference

#include <stdio.h>
#include <string.h>
#include "vsfilesystem.h"
#include <jconfig.h>
#include <jmorecfg.h>
#include <jpeglib.h>

Go to the source code of this file.

Classes
struct	memory_destination_mgr

Macros
#define	JPEG_SUPPORT
#define	__JPEG_MEMORY_H

Typedefs
typedef memory_destination_mgr *	mem_dest_ptr

Functions
	init_destination (j_compress_ptr cinfo)
	empty_output_buffer (j_compress_ptr cinfo)
	term_destination (j_compress_ptr cinfo)
	GLOBAL (void) jpeg_memory_dest(j_compress_ptr cinfo
int	jpeg_compress (char *dst, char *src, int width, int height, int dstsize, int quality)
int	jpeg_compress_to_file (char *src, char *file, int width, int height, int quality)
void	jpeg_memory_src (j_decompress_ptr cinfo, unsigned char *ptr, size_t size)
void	jpeg_decompress (unsigned char *dst, unsigned char *src, int size, int *w, int *h)
void	jpeg_decompress_from_file (unsigned char *dst, char *file, int size, int *w, int *h)

Variables
JOCTET *	buffer
JOCTET int	bufsize

Macro Definition Documentation

#define __JPEG_MEMORY_H

Definition at line 5 of file jpeg_memory.h.

#define JPEG_SUPPORT

Definition at line 2 of file jpeg_memory.h.

Typedef Documentation

typedef memory_destination_mgr* mem_dest_ptr

Definition at line 52 of file jpeg_memory.h.

Function Documentation

empty_output_buffer

(

j_compress_ptr

cinfo)

Definition at line 69 of file jpeg_memory.h.

References memory_destination_mgr::buffer, memory_destination_mgr::bufsize, memory_destination_mgr::pub, and TRUE.

Referenced by jpeg_memory_dest().

{
    mem_dest_ptr dest = (mem_dest_ptr) cinfo->dest;
    dest->pub.next_output_byte = dest->buffer;
    dest->pub.free_in_buffer   = dest->bufsize;

    return TRUE;
}

GLOBAL

(

void

)

init_destination

(

j_compress_ptr

cinfo)

Definition at line 58 of file jpeg_memory.h.

References memory_destination_mgr::buffer, memory_destination_mgr::bufsize, memory_destination_mgr::datacount, and memory_destination_mgr::pub.

Referenced by jpeg_memory_dest().

{
    mem_dest_ptr dest = (mem_dest_ptr) cinfo->dest;
    dest->pub.next_output_byte = dest->buffer;
    dest->pub.free_in_buffer   = dest->bufsize;
    dest->datacount = 0;
}

int jpeg_compress	(	char *	dst,
		char *	src,
		int	width,
		int	height,
		int	dstsize,
		int	quality
	)

Definition at line 24 of file jpeg_memory.cpp.

References memory_destination_mgr::datacount, height, jpeg_memory_dest(), TRUE, and width.

{
    struct jpeg_compress_struct cinfo;
    struct jpeg_error_mgr jerr;
    unsigned char *dataRGB = (unsigned char*) src;
    JSAMPROW row_pointer   = (JSAMPROW) dataRGB;
    JOCTET *jpgbuff;
    mem_dest_ptr   dest;
    int csize = 0;

    /* zero out the compresion info structures and
     *  allocate a new compressor handle */
    memset( &cinfo, 0, sizeof (cinfo) );
    cinfo.err = jpeg_std_error( &jerr );
    jpeg_create_compress( &cinfo );

    /* Setup JPEG datastructures */
    cinfo.image_width      = width;     /* image width and height, in pixels */
    cinfo.image_height     = height;
    cinfo.input_components = 3;     /* # of color components per pixel=3 RGB */
    cinfo.in_color_space   = JCS_RGB;
    jpgbuff = (JOCTET*) dst;

    /* Setup compression and do it */
    jpeg_memory_dest( &cinfo, jpgbuff, dstsize );
    jpeg_set_defaults( &cinfo );
    jpeg_set_quality( &cinfo, quality, TRUE );
    jpeg_start_compress( &cinfo, TRUE );
    /* compress each scanline one-at-a-time */
    while (cinfo.next_scanline < cinfo.image_height) {
        row_pointer = (JSAMPROW) ( dataRGB+(cinfo.next_scanline*3*width) );
        jpeg_write_scanlines( &cinfo, &row_pointer, 1 );
    }
    jpeg_finish_compress( &cinfo );
    /* Now extract the size of the compressed buffer */
    dest  = (mem_dest_ptr) cinfo.dest;
    csize = dest->datacount;     /* the actual compressed datasize */
    /* destroy the compressor handle */
    jpeg_destroy_compress( &cinfo );
    return csize;
}

int jpeg_compress_to_file	(	char *	src,
		char *	file,
		int	width,
		int	height,
		int	quality
	)

Definition at line 66 of file jpeg_memory.cpp.

References fclose, fopen, height, TRUE, and width.

{
    FILE    *outfile;
    struct jpeg_compress_struct cinfo;
    struct jpeg_error_mgr jerr;
    JSAMPROW row_pointer;
    if ( ( outfile = fopen( file, "wb" ) ) == NULL ) {
        cerr<<"can't open "<<file<<endl;
        return -1;
    }
    /* zero out the compresion info structures and
     *  allocate a new compressor handle */
    memset( &cinfo, 0, sizeof (cinfo) );
    cinfo.err = jpeg_std_error( &jerr );
    jpeg_create_compress( &cinfo );

    /* Setup JPEG datastructures */
    cinfo.image_width      = width;     /* image width and height, in pixels */
    cinfo.image_height     = height;
    cinfo.input_components = 3;     /* # of color components per pixel=3 RGB */
    cinfo.in_color_space   = JCS_RGB;

    /* Setup compression and do it */
    jpeg_stdio_dest( &cinfo, outfile );
    jpeg_set_defaults( &cinfo );
    jpeg_set_quality( &cinfo, quality, TRUE );
    jpeg_start_compress( &cinfo, TRUE );
    /* compress each scanline one-at-a-time */
    while (cinfo.next_scanline < cinfo.image_height) {
        row_pointer = (JSAMPROW) &src[cinfo.next_scanline*3*width];
        jpeg_write_scanlines( &cinfo, &row_pointer, 1 );
    }
    jpeg_finish_compress( &cinfo );

    /* destroy the compressor handle */
    jpeg_destroy_compress( &cinfo );
    fclose( outfile );
    return 0;
}

void jpeg_decompress	(	unsigned char *	dst,
		unsigned char *	src,
		int	size,
		int *	w,
		int *	h
	)

Definition at line 155 of file jpeg_memory.cpp.

References jpeg_memory_src(), TRUE, and y.

{
    struct jpeg_decompress_struct cinfo;
    struct jpeg_error_mgr jerr;
    size_t line_size, y;
    unsigned char *dstcur;

    cinfo.err = jpeg_std_error( &jerr );
    jpeg_create_decompress( &cinfo );
    jpeg_memory_src( &cinfo, src, size );
    jpeg_read_header( &cinfo, TRUE );
    jpeg_start_decompress( &cinfo );

    *w        = cinfo.output_width;
    *h        = cinfo.output_height;
    line_size = cinfo.output_width*cinfo.output_components;

    dstcur    = dst;
    for (y = 0; y < cinfo.output_height; y++) {
        jpeg_read_scanlines( &cinfo, (JSAMPARRAY) &dstcur, 1 );
        dstcur += line_size;
    }
    jpeg_finish_decompress( &cinfo );
    jpeg_destroy_decompress( &cinfo );
}

void jpeg_decompress_from_file	(	unsigned char *	dst,
		char *	file,
		int	size,
		int *	w,
		int *	h
	)

Definition at line 181 of file jpeg_memory.cpp.

References fclose, fopen, TRUE, and y.

{
    struct jpeg_decompress_struct cinfo;
    struct jpeg_error_mgr jerr;
    int   line_size;
    unsigned char *dstcur;
    FILE *infile;
    if ( ( infile = fopen( file, "rb" ) ) == NULL ) {
        cerr<<"can't open "<<file<<endl;
        return;
    }
    cinfo.err = jpeg_std_error( &jerr );
    jpeg_create_decompress( &cinfo );
    jpeg_stdio_src( &cinfo, infile );
    jpeg_read_header( &cinfo, TRUE );
    jpeg_start_decompress( &cinfo );

    *w        = cinfo.output_width;
    *h        = cinfo.output_height;
    line_size = cinfo.output_width*cinfo.output_components;

    dstcur    = dst;
    for (size_t y = 0; y < cinfo.output_height; y++) {
        jpeg_read_scanlines( &cinfo, (JSAMPARRAY) &dstcur, 1 );
        dstcur += line_size;
    }
    jpeg_finish_decompress( &cinfo );
    jpeg_destroy_decompress( &cinfo );
    fclose( infile );
}

void jpeg_memory_src	(	j_decompress_ptr	cinfo,
		unsigned char *	ptr,
		size_t	size
	)

set momory-jpeg image to JPEG lib Info struct

Parameters

cinfo	JPEG lib decompress infomation structure
ptr	JPEG image
size	JPEG image size

Definition at line 139 of file jpeg_memory.cpp.

References fill_input_buffer(), init_source(), size, skip_input_data(), and term_source().

Referenced by jpeg_decompress().

{
    struct jpeg_source_mgr *src;
    src = cinfo->src = (struct jpeg_source_mgr*)
                       (*cinfo->mem->alloc_small)( (j_common_ptr) cinfo,
                                                  JPOOL_PERMANENT,
                                                  sizeof (*src) );
    src->init_source       = init_source;
    src->fill_input_buffer = fill_input_buffer;
    src->skip_input_data   = skip_input_data;
    src->resync_to_restart = jpeg_resync_to_restart;
    src->term_source       = term_source;
    src->next_input_byte   = ptr;
    src->bytes_in_buffer   = size;
}

term_destination

(

j_compress_ptr

cinfo)

Definition at line 82 of file jpeg_memory.h.

References memory_destination_mgr::bufsize, memory_destination_mgr::datacount, and memory_destination_mgr::pub.

Referenced by jpeg_memory_dest().

{
    /* expose the finale compressed image size */

    mem_dest_ptr dest = (mem_dest_ptr) cinfo->dest;
    dest->datacount = dest->bufsize-dest->pub.free_in_buffer;
}

Variable Documentation

JOCTET* buffer

Definition at line 90 of file jpeg_memory.h.

Referenced by NetBuffer::addBuffer(), NetBuffer::addChar(), NetBuffer::addDouble(), NetBuffer::addFloat(), NetBuffer::addInt32(), NetBuffer::addShort(), NetBuffer::addString(), NetBuffer::addType(), NetBuffer::addUInt32(), AUDAddWatchedPlayed(), AUDDestroy(), AUDQueryAudability(), VsnetDownload::Client::Buffer::childAppend(), ddsDecompress(), NetBuffer::extAddBuffer(), CPK3::ExtractFile(), NetBuffer::getBuffer(), NetBuffer::getChar(), NetBuffer::getData(), NetBuffer::getDouble(), Unit::getFgID(), NetBuffer::getFloat(), NetBuffer::getInt32(), AImissionScript::getOrderDescription(), NetBuffer::getShort(), NetBuffer::getString(), NetBuffer::getType(), NetBuffer::getUInt32(), FileUtil::HashCompute(), XMLDOM::VSFileXMLSerializer::importXML(), XMLDOM::XMLSerializer::importXML(), mmoc::listenThread(), Audio::OpenALSimpleSound::loadImpl(), Audio::OpenALStreamingSound::loadImpl(), LoadTex(), NetBuffer::NetBuffer(), Audio::SoundBuffer::operator=(), Packet::Packet(), Audio::OpenALRenderableStreamingSource::queueALBuffers(), Audio::Stream::read(), Audio::OpenALStreamingSound::readAndFlip(), Audio::SimpleSound::readBuffer(), VsnetUDPSocket::recvbuf(), Audio::SoundBuffer::reserve(), NetBuffer::Reset(), NetBuffer::resizeBuffer(), Audio::SoundBuffer::SoundBuffer(), Audio::SoundBuffer::swap(), Audio::OpenALStreamingSound::unqueueBuffer(), XMLnode::WriteString(), and NetBuffer::~NetBuffer().

JOCTET int bufsize

Definition at line 90 of file jpeg_memory.h.

Referenced by NetBuffer::addBuffer(), VsnetDownload::Client::File::childAppend(), VsnetDownload::Client::Buffer::childAppend(), NetBuffer::extAddBuffer(), NetBuffer::NetBuffer(), setWeaponInfoToBuffer(), and VSFileSystem::VSFile::VSFile().