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689 lines
17 KiB
689 lines
17 KiB
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/***********************************************************************
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*
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* JPEG decompression utility functions
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*
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* Implement (1) JPEG memory data source
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* (2) JPEG error manager using setjmp/longjmp
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*
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* Author : Indy Zhu [indyz]
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* Date : 5/20/98
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*
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***********************************************************************/
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#include <stdio.h>
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// #include <stdlib.h>
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#include <setjmp.h>
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// Workaround for redefinition of INT32
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#define XMD_H 1
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extern "C"
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{
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// Header file for JPEG library
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#include "jpeglib.h"
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}
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#include <windows.h>
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#include "jpegutil.h"
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//
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// Buf source manager definition
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//
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typedef struct _buf_source_mgr
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{
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struct jpeg_source_mgr pub;
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// Fields specific to buf_source_mgr
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LPBYTE pJPEGBlob;
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DWORD dwSize;
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} buf_source_mgr;
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//
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// Jump error manager definition
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//
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typedef struct _jmp_error_mgr
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{
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struct jpeg_error_mgr pub;
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// Private fields for jump error manager
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jmp_buf stackContext;
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} jmp_error_mgr;
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/******************************************************************************\
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*
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* init_source()
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*
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* Arguments:
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*
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* Return Value:
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*
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* Status
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*
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* History:
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*
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* 11/4/1998 Original Version
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*
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\******************************************************************************/
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static void init_source(j_decompress_ptr pDecompInfo)
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{
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// No working necessary here
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}
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/******************************************************************************\
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*
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* fill_input_buffer()
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*
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* Arguments:
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*
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* Return Value:
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*
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* Status
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*
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* History:
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*
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* 11/4/1998 Original Version
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*
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\******************************************************************************/
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static boolean fill_input_buffer(j_decompress_ptr pDecompInfo)
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{
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buf_source_mgr *pBufSrcMgr;
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// Recover buf source manager itself
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pBufSrcMgr = (buf_source_mgr *)pDecompInfo->src;
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// buf_source_mgr can only fire one shot
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pBufSrcMgr->pub.next_input_byte = pBufSrcMgr->pJPEGBlob;
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pBufSrcMgr->pub.bytes_in_buffer = pBufSrcMgr->dwSize;
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return(TRUE);
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}
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/******************************************************************************\
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*
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* skip_input_data()
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*
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* Arguments:
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*
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* Return Value:
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*
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* Status
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*
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* History:
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*
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* 11/4/1998 Original Version
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*
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\******************************************************************************/
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static void skip_input_data(j_decompress_ptr pDecompInfo, long lBytes)
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{
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buf_source_mgr *pBufSrcMgr;
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// For buf source manager, it is very easy to implement
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if (lBytes > 0) {
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pBufSrcMgr = (buf_source_mgr *)pDecompInfo->src;
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pBufSrcMgr->pub.next_input_byte += lBytes;
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pBufSrcMgr->pub.bytes_in_buffer -= lBytes;
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}
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}
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/******************************************************************************\
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*
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* term_source()
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*
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* Arguments:
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*
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* Return Value:
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*
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* Status
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*
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* History:
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*
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* 11/4/1998 Original Version
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*
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\******************************************************************************/
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static void term_source(j_decompress_ptr pDecompInfo)
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{
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}
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/******************************************************************************\
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*
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* jpeg_buf_src()
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*
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* Arguments:
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*
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* Return Value:
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*
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* Status
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*
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* History:
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*
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* 11/4/1998 Original Version
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*
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\******************************************************************************/
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static void jpeg_buf_src(j_decompress_ptr pDecompInfo,
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LPBYTE pJPEGBlob, DWORD dwSize)
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{
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buf_source_mgr *pBufSrcMgr;
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// Allocate memory for the buf source manager
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pBufSrcMgr = (buf_source_mgr *)
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(pDecompInfo->mem->alloc_small)((j_common_ptr)pDecompInfo,
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JPOOL_PERMANENT,
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sizeof(buf_source_mgr));
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// Record the pJPEGBlob
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pBufSrcMgr->pJPEGBlob = pJPEGBlob;
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pBufSrcMgr->dwSize = dwSize;
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// Fill in the function pointers
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pBufSrcMgr->pub.init_source = init_source;
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pBufSrcMgr->pub.fill_input_buffer = fill_input_buffer;
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pBufSrcMgr->pub.skip_input_data = skip_input_data;
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pBufSrcMgr->pub.resync_to_restart = jpeg_resync_to_restart;
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pBufSrcMgr->pub.term_source = term_source;
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// Initialize the pointer into the buffer
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pBufSrcMgr->pub.bytes_in_buffer = 0;
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pBufSrcMgr->pub.next_input_byte = NULL;
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// Ask the decompression context to remember it
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pDecompInfo->src = (struct jpeg_source_mgr *)pBufSrcMgr;
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}
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/******************************************************************************\
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*
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* jmp_error_exit()
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*
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* Arguments:
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*
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* Return Value:
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*
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* Status
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*
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* History:
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*
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* 11/4/1998 Original Version
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*
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\******************************************************************************/
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static void jmp_error_exit(j_common_ptr pDecompInfo)
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{
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jmp_error_mgr *pJmpErrorMgr;
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// Get the jump error manager back
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pJmpErrorMgr = (jmp_error_mgr *)pDecompInfo->err;
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// Display the error message
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#ifdef _DEBUG
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(pDecompInfo->err->output_message)(pDecompInfo);
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#endif
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// Recover the original stack
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longjmp(pJmpErrorMgr->stackContext, 1);
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}
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/******************************************************************************\
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*
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* jpeg_jmp_error()
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*
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* Arguments:
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*
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* Return Value:
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*
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* Status
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*
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* History:
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*
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* 11/4/1998 Original Version
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*
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\******************************************************************************/
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struct jpeg_error_mgr *jpeg_jmp_error(jmp_error_mgr *pJmpErrorMgr)
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{
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// Initialize the public part
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jpeg_std_error(&pJmpErrorMgr->pub);
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// Set up jump error manager exit method
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pJmpErrorMgr->pub.error_exit = jmp_error_exit;
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return((jpeg_error_mgr *)pJmpErrorMgr);
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}
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/******************************************************************************\
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*
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* GetJPEGDimensions()
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*
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* Arguments:
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*
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* Return Value:
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*
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* Status
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*
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* History:
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*
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* 11/4/1998 Original Version
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*
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\******************************************************************************/
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int GetJPEGDimensions(LPBYTE pJPEGBlob, DWORD dwSize,
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LONG *pWidth, LONG *pHeight, WORD *pChannel)
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{
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int ret;
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struct jpeg_decompress_struct decompInfo;
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jmp_error_mgr jpegErrMgr;
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// Step 1 : Initialize JPEG session data-structure
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decompInfo.err = jpeg_jmp_error(&jpegErrMgr);
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jpeg_create_decompress(&decompInfo);
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// Reserve the state of the current stack
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if (setjmp(jpegErrMgr.stackContext)) {
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// JPEG lib will longjump here when there is an error
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jpeg_destroy_decompress(&decompInfo);
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return(JPEGERR_INTERNAL_ERROR);
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}
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// Step 2 : Specify the source of the compressed data
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jpeg_buf_src(&decompInfo, pJPEGBlob, dwSize);
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// Step 3 : Read JPEG file header information
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ret = jpeg_read_header(&decompInfo, TRUE);
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// Release the decompression context
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jpeg_destroy_decompress(&decompInfo);
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// Fill in the dimension info for the caller
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*pWidth = decompInfo.image_width;
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*pHeight = decompInfo.image_height;
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*pChannel = decompInfo.num_components;
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if (ret != JPEG_HEADER_OK) {
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return(JPEGERR_INTERNAL_ERROR);
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}
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return(JPEGERR_NO_ERROR);
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}
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/******************************************************************************\
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*
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* DecompProgressJPEG()
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*
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* Arguments:
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*
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* Assumption : The JPEG is 24bits.
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* pDIBPixel is the pixel buffer of a DIB
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*
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* Return Value:
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*
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* Status
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*
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* History:
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*
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* 11/4/1998 Original Version
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*
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\******************************************************************************/
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short __stdcall
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DecompProgressJPEG(
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LPBYTE pJPEGBlob,
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DWORD dwSize,
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LPBYTE pDIBPixel,
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DWORD dwBytesPerScanLine,
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JPEGCallbackProc pProgressCB,
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PVOID pCBContext)
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{
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struct jpeg_decompress_struct decompInfo;
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jmp_error_mgr jpegErrMgr;
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LPBYTE pCurScanBuf;
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JSAMPLE sampleTemp;
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LPBYTE pCurPixel;
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DWORD i;
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//
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// Callback related variables
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//
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ULONG ulImageSize;
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ULONG ulOffset;
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ULONG ulNewScanlines;
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ULONG ulCBInterval;
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BOOL bRet = FALSE;
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// Step 1 : Initialize JPEG session data-structure
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decompInfo.err = jpeg_jmp_error(&jpegErrMgr);
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jpeg_create_decompress(&decompInfo);
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// Reserve the state of the current stack
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if (setjmp(jpegErrMgr.stackContext)) {
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// JPEG lib will longjump here when there is an error
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jpeg_destroy_decompress(&decompInfo);
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return(JPEGERR_INTERNAL_ERROR);
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}
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// Step 2 : Specify the source of the compressed data
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jpeg_buf_src(&decompInfo, pJPEGBlob, dwSize);
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// Step 3 : Read JPEG file header information
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if (jpeg_read_header(&decompInfo, TRUE) != JPEG_HEADER_OK) {
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jpeg_destroy_decompress(&decompInfo);
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return(JPEGERR_INTERNAL_ERROR);
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}
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// Step 4 : Set parameter for decompression
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// Defaults are OK for this occasssion
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// Step 5 : Start the real action
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jpeg_start_decompress(&decompInfo);
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//
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// Prepare for the final decompression
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//
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pCurScanBuf = pDIBPixel +
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(decompInfo.image_height - 1) * dwBytesPerScanLine;
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if (pProgressCB) {
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ulImageSize = decompInfo.image_height * dwBytesPerScanLine;
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ulCBInterval = decompInfo.image_height / 10;
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ulOffset = 0;
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ulNewScanlines = 0;
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}
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// Step 6 : Acquire the scan line
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while (decompInfo.output_scanline < decompInfo.output_height) {
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jpeg_read_scanlines(&decompInfo, &pCurScanBuf, 1);
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// Famous swapping for the unique format of Windows
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pCurPixel = pCurScanBuf;
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for (i = 0; i < decompInfo.image_width;
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i++, pCurPixel += decompInfo.num_components) {
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sampleTemp = *pCurPixel;
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*pCurPixel = *(pCurPixel + 2);
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*(pCurPixel + 2) = sampleTemp;
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}
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pCurScanBuf -= dwBytesPerScanLine;
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//
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// Fire the callback when possible and necessary
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//
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if (pProgressCB) {
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ulNewScanlines++;
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ulOffset += dwBytesPerScanLine;
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if ((ulNewScanlines == ulCBInterval) ||
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(decompInfo.output_scanline == decompInfo.output_height)) {
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bRet = pProgressCB(
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ulImageSize, ulNewScanlines,
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ulNewScanlines * dwBytesPerScanLine,
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pDIBPixel, pCBContext);
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if (! bRet) {
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break;
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}
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}
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}
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}
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// Step 7 : Finish the job
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jpeg_finish_decompress(&decompInfo);
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// Step 8 : Garbage collection
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jpeg_destroy_decompress(&decompInfo);
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if (bRet) {
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return(JPEGERR_NO_ERROR);
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} else {
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return(JPEGERR_CALLBACK_ERROR);
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}
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}
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/******************************************************************************\
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*
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* DecompTransferJPEG()
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*
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* Arguments:
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*
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* ppDIBPixel - *ppDIBPixel will change between callback if multiple buffer is
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* used, but dwBufSize is assumed to be constant.
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*
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* Return Value:
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*
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* Status
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*
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* History:
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*
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* 1/20/1999 Original Version
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*
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\******************************************************************************/
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short __stdcall
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DecompTransferJPEG(
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LPBYTE pJPEGBlob,
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DWORD dwSize,
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LPBYTE *ppDIBPixel,
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DWORD dwBufSize,
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DWORD dwBytesPerScanLine,
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JPEGCallbackProc pProgressCB,
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PVOID pCBContext)
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{
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struct jpeg_decompress_struct decompInfo;
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jmp_error_mgr jpegErrMgr;
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LPBYTE pCurScanLine;
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JSAMPLE sampleTemp;
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LPBYTE pCurPixel;
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DWORD i;
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//
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// Callback related variables
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//
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ULONG ulImageSize;
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ULONG ulOffset = 0;
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ULONG ulBufferLeft;
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BOOL bRet = FALSE;
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//
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// Parameter checking
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//
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if ((! ppDIBPixel) || (! *ppDIBPixel) || (! pProgressCB)) {
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return (JPEGERR_INTERNAL_ERROR);
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}
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// Step 1 : Initialize JPEG session data-structure
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decompInfo.err = jpeg_jmp_error(&jpegErrMgr);
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jpeg_create_decompress(&decompInfo);
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// Reserve the state of the current stack
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if (setjmp(jpegErrMgr.stackContext)) {
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// JPEG lib will longjump here when there is an error
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jpeg_destroy_decompress(&decompInfo);
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return(JPEGERR_INTERNAL_ERROR);
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}
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// Step 2 : Specify the source of the compressed data
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jpeg_buf_src(&decompInfo, pJPEGBlob, dwSize);
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// Step 3 : Read JPEG file header information
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if (jpeg_read_header(&decompInfo, TRUE) != JPEG_HEADER_OK) {
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jpeg_destroy_decompress(&decompInfo);
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return(JPEGERR_INTERNAL_ERROR);
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}
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// Step 4 : Set parameter for decompression
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// Defaults are OK for this occasssion
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// Step 5 : Start the real action
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jpeg_start_decompress(&decompInfo);
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//
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// Prepare for the final decompression
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//
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ulImageSize = decompInfo.image_height * dwBytesPerScanLine;
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ulBufferLeft = dwBufSize;
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pCurScanLine = *ppDIBPixel;
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// Step 6 : Acquire the scan line
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while (decompInfo.output_scanline < decompInfo.output_height) {
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jpeg_read_scanlines(&decompInfo, &pCurScanLine, 1);
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// Famous swapping for the unique format of Windows
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pCurPixel = pCurScanLine;
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for (i = 0; i < decompInfo.image_width;
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i++, pCurPixel += decompInfo.num_components) {
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sampleTemp = *pCurPixel;
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*pCurPixel = *(pCurPixel + 2);
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*(pCurPixel + 2) = sampleTemp;
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}
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pCurScanLine += dwBytesPerScanLine;
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ulBufferLeft -= dwBytesPerScanLine;
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//
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// Fire the callback when possible and necessary
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//
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if ((ulBufferLeft < dwBytesPerScanLine) ||
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(decompInfo.output_scanline == decompInfo.output_height)) {
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bRet = pProgressCB(
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ulImageSize,
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ulOffset,
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dwBufSize - ulBufferLeft,
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*ppDIBPixel, pCBContext);
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if (! bRet) {
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break;
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}
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//
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// Reset the buffer, which may have been switched by the callback
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//
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ulBufferLeft = dwBufSize;
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pCurScanLine = *ppDIBPixel;
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ulOffset = decompInfo.output_scanline * dwBytesPerScanLine;
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}
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}
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// Step 7 : Finish the job
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jpeg_finish_decompress(&decompInfo);
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// Step 8 : Garbage collection
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jpeg_destroy_decompress(&decompInfo);
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if (bRet) {
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return(JPEGERR_NO_ERROR);
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} else {
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return(JPEGERR_CALLBACK_ERROR);
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}
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}
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/******************************************************************************\
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*
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* DecompJPEG()
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*
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* Arguments:
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*
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* Assumption : The JPEG is 24bits.
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* pDIBPixel is the pixel buffer of a DIB
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*
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* Return Value:
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*
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* Status
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*
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* History:
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*
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* 11/4/1998 Original Version
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*
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\******************************************************************************/
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SHORT __stdcall
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DecompJPEG(
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LPBYTE pJPEGBlob,
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DWORD dwSize,
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LPBYTE pDIBPixel,
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DWORD dwBytesPerScanLine)
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{
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struct jpeg_decompress_struct decompInfo;
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jmp_error_mgr jpegErrMgr;
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LPBYTE pCurScanBuf;
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JSAMPLE sampleTemp;
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LPBYTE pCurPixel;
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DWORD i;
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// Step 1 : Initialize JPEG session data-structure
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decompInfo.err = jpeg_jmp_error(&jpegErrMgr);
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jpeg_create_decompress(&decompInfo);
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// Reserve the state of the current stack
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if (setjmp(jpegErrMgr.stackContext)) {
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// JPEG lib will longjump here when there is an error
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jpeg_destroy_decompress(&decompInfo);
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return(-1);
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}
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// Step 2 : Specify the source of the compressed data
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jpeg_buf_src(&decompInfo, pJPEGBlob, dwSize);
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// Step 3 : Read JPEG file header information
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if (jpeg_read_header(&decompInfo, TRUE) != JPEG_HEADER_OK) {
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jpeg_destroy_decompress(&decompInfo);
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return(-1);
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}
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// Step 4 : Set parameter for decompression
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// Defaults are OK for this occasssion
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|
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// Step 5 : Start the real action
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jpeg_start_decompress(&decompInfo);
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pCurScanBuf = pDIBPixel +
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(decompInfo.image_height - 1) * dwBytesPerScanLine;
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// Step 6 : Acquire the scan line
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while (decompInfo.output_scanline < decompInfo.output_height) {
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|
|
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jpeg_read_scanlines(&decompInfo, &pCurScanBuf, 1);
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|
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// Famous swapping for the unique format of Windows
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|
pCurPixel = pCurScanBuf;
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for (i = 0; i < decompInfo.image_width;
|
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i++, pCurPixel += decompInfo.num_components) {
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sampleTemp = *pCurPixel;
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|
*pCurPixel = *(pCurPixel + 2);
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*(pCurPixel + 2) = sampleTemp;
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}
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pCurScanBuf -= dwBytesPerScanLine;
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|
}
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// Step 7 : Finish the job
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|
jpeg_finish_decompress(&decompInfo);
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|
|
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// Step 8 : Garbage collection
|
|
jpeg_destroy_decompress(&decompInfo);
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|
|
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return(0);
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|
}
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