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/* ************************************************************************** */
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/* * For conditions of distribution and use, * */
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/* * see copyright notice in libmng.h * */
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/* ************************************************************************** */
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/* * * */
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/* * project : libmng * */
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/* * file : libmng_jpeg.c copyright (c) 2000-2004 G.Juyn * */
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/* * version : 1.0.9 * */
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/* * * */
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/* * purpose : JPEG library interface (implementation) * */
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/* * * */
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/* * author : G.Juyn * */
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/* * * */
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/* * comment : implementation of the JPEG library interface * */
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/* * * */
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/* * changes : 0.5.1 - 05/08/2000 - G.Juyn * */
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/* * - changed strict-ANSI stuff * */
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/* * * */
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/* * 0.5.2 - 05/22/2000 - G.Juyn * */
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/* * - implemented all the JNG routines * */
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/* * * */
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/* * 0.5.3 - 06/17/2000 - G.Juyn * */
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/* * - added tracing of JPEG calls * */
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/* * 0.5.3 - 06/24/2000 - G.Juyn * */
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/* * - fixed inclusion of IJG read/write code * */
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/* * 0.5.3 - 06/29/2000 - G.Juyn * */
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/* * - fixed some 64-bit warnings * */
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/* * * */
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/* * 0.9.2 - 08/05/2000 - G.Juyn * */
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/* * - changed file-prefixes * */
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/* * * */
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/* * 0.9.3 - 10/16/2000 - G.Juyn * */
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/* * - added support for JDAA * */
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/* * * */
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/* * 1.0.1 - 04/19/2001 - G.Juyn * */
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/* * - added export of JPEG functions for DLL * */
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/* * 1.0.1 - 04/22/2001 - G.Juyn * */
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/* * - fixed memory-leaks (Thanks Gregg!) * */
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/* * * */
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/* * 1.0.4 - 06/22/2002 - G.Juyn * */
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/* * - B526138 - returned IJGSRC6B calling convention to * */
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/* * default for MSVC * */
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/* * * */
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/* * 1.0.5 - 24/02/2003 - G.Juyn * */
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/* * - B683152 - libjpeg suspension not always honored correctly* */
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/* * * */
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/* * 1.0.6 - 03/04/2003 - G.Juyn * */
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/* * - fixed some compiler-warnings * */
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/* * * */
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/* * 1.0.8 - 08/01/2004 - G.Juyn * */
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/* * - added support for 3+byte pixelsize for JPEG's * */
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/* * * */
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/* * 1.0.9 - 12/20/2004 - G.Juyn * */
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/* * - cleaned up macro-invocations (thanks to D. Airlie) * */
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/* * * */
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/* ************************************************************************** */
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#include "libmng.h"
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#include "libmng_data.h"
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#include "libmng_error.h"
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#include "libmng_trace.h"
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#ifdef __BORLANDC__
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#pragma hdrstop
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#endif
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#include "libmng_memory.h"
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#include "libmng_pixels.h"
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#include "libmng_jpeg.h"
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#if defined(__BORLANDC__) && defined(MNG_STRICT_ANSI)
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#pragma option -A /* force ANSI-C */
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#endif
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/* ************************************************************************** */
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#if defined(MNG_INCLUDE_JNG) && defined(MNG_INCLUDE_DISPLAY_PROCS)
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/* ************************************************************************** */
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/* * * */
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/* * Local IJG callback routines (source-manager, error-manager and such) * */
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/* * * */
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/* ************************************************************************** */
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#ifdef MNG_INCLUDE_IJG6B
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/* ************************************************************************** */
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#ifdef MNG_INCLUDE_JNG_READ
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#ifdef MNG_DEFINE_JPEG_STDCALL
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void MNG_DECL mng_init_source (j_decompress_ptr cinfo)
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#else
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void mng_init_source (j_decompress_ptr cinfo)
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#endif
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{
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return; /* nothing needed */
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}
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#endif /* MNG_INCLUDE_JNG_READ */
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/* ************************************************************************** */
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#ifdef MNG_INCLUDE_JNG_READ
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#ifdef MNG_DEFINE_JPEG_STDCALL
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boolean MNG_DECL mng_fill_input_buffer (j_decompress_ptr cinfo)
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#else
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boolean mng_fill_input_buffer (j_decompress_ptr cinfo)
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#endif
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{
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return FALSE; /* force IJG routine to return to caller */
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}
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#endif /* MNG_INCLUDE_JNG_READ */
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/* ************************************************************************** */
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#ifdef MNG_INCLUDE_JNG_READ
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#ifdef MNG_DEFINE_JPEG_STDCALL
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void MNG_DECL mng_skip_input_data (j_decompress_ptr cinfo, long num_bytes)
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#else
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void mng_skip_input_data (j_decompress_ptr cinfo, long num_bytes)
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#endif
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{
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if (num_bytes > 0) /* ignore fony calls */
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{ /* address my generic structure */
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mng_datap pData = (mng_datap)cinfo->client_data;
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/* address source manager */
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mngjpeg_sourcep pSrc = pData->pJPEGdinfo->src;
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/* problem scenario ? */
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if (pSrc->bytes_in_buffer < (size_t)num_bytes)
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{ /* tell the boss we need to skip some data! */
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pData->iJPEGtoskip = (mng_uint32)((size_t)num_bytes - pSrc->bytes_in_buffer);
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pSrc->bytes_in_buffer = 0; /* let the JPEG lib suspend */
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pSrc->next_input_byte = MNG_NULL;
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}
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else
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{ /* simply advance in the buffer */
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pSrc->bytes_in_buffer -= num_bytes;
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pSrc->next_input_byte += num_bytes;
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}
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}
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return;
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}
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#endif /* MNG_INCLUDE_JNG_READ */
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/* ************************************************************************** */
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#ifdef MNG_INCLUDE_JNG_READ
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#ifdef MNG_DEFINE_JPEG_STDCALL
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void MNG_DECL mng_skip_input_data2 (j_decompress_ptr cinfo, long num_bytes)
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#else
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void mng_skip_input_data2 (j_decompress_ptr cinfo, long num_bytes)
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#endif
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{
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if (num_bytes > 0) /* ignore fony calls */
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{ /* address my generic structure */
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mng_datap pData = (mng_datap)cinfo->client_data;
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/* address source manager */
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mngjpeg_sourcep pSrc = pData->pJPEGdinfo2->src;
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/* problem scenario ? */
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if (pSrc->bytes_in_buffer < (size_t)num_bytes)
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{ /* tell the boss we need to skip some data! */
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pData->iJPEGtoskip2 = (mng_uint32)((size_t)num_bytes - pSrc->bytes_in_buffer);
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pSrc->bytes_in_buffer = 0; /* let the JPEG lib suspend */
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pSrc->next_input_byte = MNG_NULL;
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}
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else
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{ /* simply advance in the buffer */
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pSrc->bytes_in_buffer -= num_bytes;
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pSrc->next_input_byte += num_bytes;
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}
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}
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return;
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}
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#endif /* MNG_INCLUDE_JNG_READ */
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/* ************************************************************************** */
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#ifdef MNG_INCLUDE_JNG_READ
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#ifdef MNG_DEFINE_JPEG_STDCALL
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void MNG_DECL mng_term_source (j_decompress_ptr cinfo)
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#else
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void mng_term_source (j_decompress_ptr cinfo)
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#endif
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{
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return; /* nothing needed */
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}
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#endif /* MNG_INCLUDE_JNG_READ */
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/* ************************************************************************** */
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#ifdef MNG_USE_SETJMP
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#ifdef MNG_DEFINE_JPEG_STDCALL
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void MNG_DECL mng_error_exit (j_common_ptr cinfo)
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#else
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void mng_error_exit (j_common_ptr cinfo)
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#endif
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{ /* address my generic structure */
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mng_datap pData = (mng_datap)cinfo->client_data;
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#ifdef MNG_ERROR_TELLTALE /* fill the message text ??? */
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(*cinfo->err->output_message) (cinfo);
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#endif
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/* return to the point of no return... */
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longjmp (pData->sErrorbuf, cinfo->err->msg_code);
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}
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#endif /* MNG_USE_SETJMP */
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/* ************************************************************************** */
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#ifdef MNG_USE_SETJMP
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#ifdef MNG_DEFINE_JPEG_STDCALL
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void MNG_DECL mng_output_message (j_common_ptr cinfo)
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#else
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void mng_output_message (j_common_ptr cinfo)
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#endif
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{
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return; /* just do nothing ! */
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}
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#endif /* MNG_USE_SETJMP */
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/* ************************************************************************** */
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#endif /* MNG_INCLUDE_IJG6B */
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/* ************************************************************************** */
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/* * * */
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/* * Global JPEG routines * */
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/* * * */
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/* ************************************************************************** */
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mng_retcode mngjpeg_initialize (mng_datap pData)
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{
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#ifdef MNG_SUPPORT_TRACE
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MNG_TRACE (pData, MNG_FN_JPEG_INITIALIZE, MNG_LC_START);
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#endif
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/* allocate space for JPEG structures if necessary */
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#ifdef MNG_INCLUDE_JNG_READ
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if (pData->pJPEGderr == MNG_NULL)
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MNG_ALLOC (pData, pData->pJPEGderr, sizeof (mngjpeg_error ));
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if (pData->pJPEGdsrc == MNG_NULL)
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MNG_ALLOC (pData, pData->pJPEGdsrc, sizeof (mngjpeg_source));
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if (pData->pJPEGdinfo == MNG_NULL)
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MNG_ALLOC (pData, pData->pJPEGdinfo, sizeof (mngjpeg_decomp));
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/* enable reverse addressing */
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pData->pJPEGdinfo->client_data = pData;
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if (pData->pJPEGderr2 == MNG_NULL)
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MNG_ALLOC (pData, pData->pJPEGderr2, sizeof (mngjpeg_error ));
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if (pData->pJPEGdsrc2 == MNG_NULL)
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MNG_ALLOC (pData, pData->pJPEGdsrc2, sizeof (mngjpeg_source));
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if (pData->pJPEGdinfo2 == MNG_NULL)
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MNG_ALLOC (pData, pData->pJPEGdinfo2, sizeof (mngjpeg_decomp));
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/* enable reverse addressing */
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pData->pJPEGdinfo2->client_data = pData;
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#endif
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#ifdef MNG_INCLUDE_JNG_WRITE
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if (pData->pJPEGcerr == MNG_NULL)
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MNG_ALLOC (pData, pData->pJPEGcerr, sizeof (mngjpeg_error ));
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if (pData->pJPEGcinfo == MNG_NULL)
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MNG_ALLOC (pData, pData->pJPEGcinfo, sizeof (mngjpeg_comp ));
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/* enable reverse addressing */
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pData->pJPEGcinfo->client_data = pData;
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#endif
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if (pData->pJPEGbuf == MNG_NULL) /* initialize temporary buffers */
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{
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pData->iJPEGbufmax = MNG_JPEG_MAXBUF;
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MNG_ALLOC (pData, pData->pJPEGbuf, pData->iJPEGbufmax);
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}
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if (pData->pJPEGbuf2 == MNG_NULL)
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{
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pData->iJPEGbufmax2 = MNG_JPEG_MAXBUF;
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MNG_ALLOC (pData, pData->pJPEGbuf2, pData->iJPEGbufmax2);
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}
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pData->pJPEGcurrent = pData->pJPEGbuf;
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pData->iJPEGbufremain = 0;
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pData->pJPEGrow = MNG_NULL;
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pData->iJPEGrowlen = 0;
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pData->iJPEGtoskip = 0;
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pData->pJPEGcurrent2 = pData->pJPEGbuf2;
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pData->iJPEGbufremain2 = 0;
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pData->pJPEGrow2 = MNG_NULL;
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pData->iJPEGrowlen2 = 0;
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pData->iJPEGtoskip2 = 0;
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/* not doing anything yet ! */
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pData->bJPEGcompress = MNG_FALSE;
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pData->bJPEGdecompress = MNG_FALSE;
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pData->bJPEGhasheader = MNG_FALSE;
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pData->bJPEGdecostarted = MNG_FALSE;
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pData->bJPEGscanstarted = MNG_FALSE;
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pData->bJPEGscanending = MNG_FALSE;
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pData->bJPEGdecompress2 = MNG_FALSE;
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pData->bJPEGhasheader2 = MNG_FALSE;
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pData->bJPEGdecostarted2 = MNG_FALSE;
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pData->bJPEGscanstarted2 = MNG_FALSE;
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pData->iJPEGrow = 0; /* zero input/output lines */
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pData->iJPEGalpharow = 0;
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pData->iJPEGrgbrow = 0;
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pData->iJPEGdisprow = 0;
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#ifdef MNG_SUPPORT_TRACE
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MNG_TRACE (pData, MNG_FN_JPEG_INITIALIZE, MNG_LC_END);
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#endif
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return MNG_NOERROR;
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}
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/* ************************************************************************** */
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mng_retcode mngjpeg_cleanup (mng_datap pData)
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{
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#if defined(MNG_INCLUDE_IJG6B) && defined(MNG_USE_SETJMP)
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mng_retcode iRetcode;
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#endif
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#ifdef MNG_SUPPORT_TRACE
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MNG_TRACE (pData, MNG_FN_JPEG_CLEANUP, MNG_LC_START);
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#endif
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#ifdef MNG_INCLUDE_IJG6B
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#ifdef MNG_USE_SETJMP
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iRetcode = setjmp (pData->sErrorbuf);/* setup local JPEG error-recovery */
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if (iRetcode != 0) /* got here from longjmp ? */
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MNG_ERRORJ (pData, iRetcode); /* then IJG-lib issued an error */
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333 |
#endif
|
|
|
334 |
|
|
|
335 |
#ifdef MNG_INCLUDE_JNG_READ /* still decompressing something ? */
|
|
|
336 |
if (pData->bJPEGdecompress)
|
|
|
337 |
jpeg_destroy_decompress (pData->pJPEGdinfo);
|
|
|
338 |
if (pData->bJPEGdecompress2)
|
|
|
339 |
jpeg_destroy_decompress (pData->pJPEGdinfo2);
|
|
|
340 |
#endif
|
|
|
341 |
|
|
|
342 |
#ifdef MNG_INCLUDE_JNG_WRITE
|
|
|
343 |
if (pData->bJPEGcompress) /* still compressing something ? */
|
|
|
344 |
jpeg_destroy_compress (pData->pJPEGcinfo);
|
|
|
345 |
#endif
|
|
|
346 |
|
|
|
347 |
#endif /* MNG_INCLUDE_IJG6B */
|
|
|
348 |
/* cleanup temporary buffers */
|
|
|
349 |
MNG_FREE (pData, pData->pJPEGbuf2, pData->iJPEGbufmax2);
|
|
|
350 |
MNG_FREE (pData, pData->pJPEGbuf, pData->iJPEGbufmax);
|
|
|
351 |
/* cleanup space for JPEG structures */
|
|
|
352 |
#ifdef MNG_INCLUDE_JNG_WRITE
|
|
|
353 |
MNG_FREE (pData, pData->pJPEGcinfo, sizeof (mngjpeg_comp ));
|
|
|
354 |
MNG_FREE (pData, pData->pJPEGcerr, sizeof (mngjpeg_error ));
|
|
|
355 |
#endif
|
|
|
356 |
|
|
|
357 |
#ifdef MNG_INCLUDE_JNG_READ
|
|
|
358 |
MNG_FREE (pData, pData->pJPEGdinfo, sizeof (mngjpeg_decomp));
|
|
|
359 |
MNG_FREE (pData, pData->pJPEGdsrc, sizeof (mngjpeg_source));
|
|
|
360 |
MNG_FREE (pData, pData->pJPEGderr, sizeof (mngjpeg_error ));
|
|
|
361 |
MNG_FREE (pData, pData->pJPEGdinfo2, sizeof (mngjpeg_decomp));
|
|
|
362 |
MNG_FREE (pData, pData->pJPEGdsrc2, sizeof (mngjpeg_source));
|
|
|
363 |
MNG_FREE (pData, pData->pJPEGderr2, sizeof (mngjpeg_error ));
|
|
|
364 |
#endif
|
|
|
365 |
|
|
|
366 |
MNG_FREE (pData, pData->pJPEGrow2, pData->iJPEGrowlen2);
|
|
|
367 |
MNG_FREE (pData, pData->pJPEGrow, pData->iJPEGrowlen);
|
|
|
368 |
/* whatever we were doing ... */
|
|
|
369 |
/* we don't anymore ... */
|
|
|
370 |
pData->bJPEGcompress = MNG_FALSE;
|
|
|
371 |
|
|
|
372 |
pData->bJPEGdecompress = MNG_FALSE;
|
|
|
373 |
pData->bJPEGhasheader = MNG_FALSE;
|
|
|
374 |
pData->bJPEGdecostarted = MNG_FALSE;
|
|
|
375 |
pData->bJPEGscanstarted = MNG_FALSE;
|
|
|
376 |
pData->bJPEGscanending = MNG_FALSE;
|
|
|
377 |
|
|
|
378 |
pData->bJPEGdecompress2 = MNG_FALSE;
|
|
|
379 |
pData->bJPEGhasheader2 = MNG_FALSE;
|
|
|
380 |
pData->bJPEGdecostarted2 = MNG_FALSE;
|
|
|
381 |
pData->bJPEGscanstarted2 = MNG_FALSE;
|
|
|
382 |
|
|
|
383 |
#ifdef MNG_SUPPORT_TRACE
|
|
|
384 |
MNG_TRACE (pData, MNG_FN_JPEG_CLEANUP, MNG_LC_END);
|
|
|
385 |
#endif
|
|
|
386 |
|
|
|
387 |
return MNG_NOERROR;
|
|
|
388 |
}
|
|
|
389 |
|
|
|
390 |
/* ************************************************************************** */
|
|
|
391 |
/* * * */
|
|
|
392 |
/* * JPEG decompression routines (JDAT) * */
|
|
|
393 |
/* * * */
|
|
|
394 |
/* ************************************************************************** */
|
|
|
395 |
|
|
|
396 |
#ifdef MNG_INCLUDE_JNG_READ
|
|
|
397 |
mng_retcode mngjpeg_decompressinit (mng_datap pData)
|
|
|
398 |
{
|
|
|
399 |
#if defined(MNG_INCLUDE_IJG6B) && defined(MNG_USE_SETJMP)
|
|
|
400 |
mng_retcode iRetcode;
|
|
|
401 |
#endif
|
|
|
402 |
|
|
|
403 |
#ifdef MNG_SUPPORT_TRACE
|
|
|
404 |
MNG_TRACE (pData, MNG_FN_JPEG_DECOMPRESSINIT, MNG_LC_START);
|
|
|
405 |
#endif
|
|
|
406 |
|
|
|
407 |
#ifdef MNG_INCLUDE_IJG6B
|
|
|
408 |
/* allocate and initialize a JPEG decompression object */
|
|
|
409 |
pData->pJPEGdinfo->err = jpeg_std_error (pData->pJPEGderr);
|
|
|
410 |
|
|
|
411 |
#ifdef MNG_USE_SETJMP /* setup local JPEG error-routines */
|
|
|
412 |
pData->pJPEGderr->error_exit = mng_error_exit;
|
|
|
413 |
pData->pJPEGderr->output_message = mng_output_message;
|
|
|
414 |
|
|
|
415 |
iRetcode = setjmp (pData->sErrorbuf);/* setup local JPEG error-recovery */
|
|
|
416 |
if (iRetcode != 0) /* got here from longjmp ? */
|
|
|
417 |
MNG_ERRORJ (pData, iRetcode); /* then IJG-lib issued an error */
|
|
|
418 |
#endif /* MNG_USE_SETJMP */
|
|
|
419 |
|
|
|
420 |
/* allocate and initialize a JPEG decompression object (continued) */
|
|
|
421 |
#ifdef MNG_SUPPORT_TRACE
|
|
|
422 |
MNG_TRACE (pData, MNG_FN_JPEG_DECOMPRESSINIT, MNG_LC_JPEG_CREATE_DECOMPRESS)
|
|
|
423 |
#endif
|
|
|
424 |
jpeg_create_decompress (pData->pJPEGdinfo);
|
|
|
425 |
|
|
|
426 |
pData->bJPEGdecompress = MNG_TRUE; /* indicate it's initialized */
|
|
|
427 |
|
|
|
428 |
/* specify the source of the compressed data (eg, a file) */
|
|
|
429 |
/* no, not a file; we have buffered input */
|
|
|
430 |
pData->pJPEGdinfo->src = pData->pJPEGdsrc;
|
|
|
431 |
/* use the default handler */
|
|
|
432 |
pData->pJPEGdinfo->src->resync_to_restart = jpeg_resync_to_restart;
|
|
|
433 |
/* setup local source routine & parms */
|
|
|
434 |
pData->pJPEGdinfo->src->init_source = mng_init_source;
|
|
|
435 |
pData->pJPEGdinfo->src->fill_input_buffer = mng_fill_input_buffer;
|
|
|
436 |
pData->pJPEGdinfo->src->skip_input_data = mng_skip_input_data;
|
|
|
437 |
pData->pJPEGdinfo->src->term_source = mng_term_source;
|
|
|
438 |
pData->pJPEGdinfo->src->next_input_byte = pData->pJPEGcurrent;
|
|
|
439 |
pData->pJPEGdinfo->src->bytes_in_buffer = pData->iJPEGbufremain;
|
|
|
440 |
|
|
|
441 |
#endif /* MNG_INCLUDE_IJG6B */
|
|
|
442 |
|
|
|
443 |
#ifdef MNG_SUPPORT_TRACE
|
|
|
444 |
MNG_TRACE (pData, MNG_FN_JPEG_DECOMPRESSINIT, MNG_LC_END);
|
|
|
445 |
#endif
|
|
|
446 |
|
|
|
447 |
return MNG_NOERROR;
|
|
|
448 |
}
|
|
|
449 |
#endif /* MNG_INCLUDE_JNG_READ */
|
|
|
450 |
|
|
|
451 |
/* ************************************************************************** */
|
|
|
452 |
|
|
|
453 |
#ifdef MNG_INCLUDE_JNG_READ
|
|
|
454 |
mng_retcode mngjpeg_decompressdata (mng_datap pData,
|
|
|
455 |
mng_uint32 iRawsize,
|
|
|
456 |
mng_uint8p pRawdata)
|
|
|
457 |
{
|
|
|
458 |
mng_retcode iRetcode;
|
|
|
459 |
mng_uint32 iRemain;
|
|
|
460 |
mng_uint8p pWork;
|
|
|
461 |
|
|
|
462 |
#ifdef MNG_SUPPORT_TRACE
|
|
|
463 |
MNG_TRACE (pData, MNG_FN_JPEG_DECOMPRESSDATA, MNG_LC_START);
|
|
|
464 |
#endif
|
|
|
465 |
|
|
|
466 |
#if defined (MNG_INCLUDE_IJG6B) && defined(MNG_USE_SETJMP)
|
|
|
467 |
iRetcode = setjmp (pData->sErrorbuf);/* initialize local JPEG error-recovery */
|
|
|
468 |
if (iRetcode != 0) /* got here from longjmp ? */
|
|
|
469 |
MNG_ERRORJ (pData, iRetcode); /* then IJG-lib issued an error */
|
|
|
470 |
#endif
|
|
|
471 |
|
|
|
472 |
pWork = pRawdata;
|
|
|
473 |
iRemain = iRawsize;
|
|
|
474 |
|
|
|
475 |
if (pData->iJPEGtoskip) /* JPEG-lib told us to skip some more data ? */
|
|
|
476 |
{
|
|
|
477 |
if (iRemain > pData->iJPEGtoskip) /* enough data in this buffer ? */
|
|
|
478 |
{
|
|
|
479 |
iRemain -= pData->iJPEGtoskip; /* skip enough to access the next byte */
|
|
|
480 |
pWork += pData->iJPEGtoskip;
|
|
|
481 |
|
|
|
482 |
pData->iJPEGtoskip = 0; /* no more to skip then */
|
|
|
483 |
}
|
|
|
484 |
else
|
|
|
485 |
{
|
|
|
486 |
pData->iJPEGtoskip -= iRemain; /* skip all data in the buffer */
|
|
|
487 |
iRemain = 0; /* and indicate this accordingly */
|
|
|
488 |
}
|
|
|
489 |
/* the skip set current-pointer to NULL ! */
|
|
|
490 |
pData->pJPEGcurrent = pData->pJPEGbuf;
|
|
|
491 |
}
|
|
|
492 |
|
|
|
493 |
while (iRemain) /* repeat until no more input-bytes */
|
|
|
494 |
{ /* need to shift anything ? */
|
|
|
495 |
if ((pData->pJPEGcurrent > pData->pJPEGbuf) &&
|
|
|
496 |
(pData->pJPEGcurrent - pData->pJPEGbuf + pData->iJPEGbufremain + iRemain > pData->iJPEGbufmax))
|
|
|
497 |
{
|
|
|
498 |
if (pData->iJPEGbufremain > 0) /* then do so */
|
|
|
499 |
MNG_COPY (pData->pJPEGbuf, pData->pJPEGcurrent, pData->iJPEGbufremain);
|
|
|
500 |
|
|
|
501 |
pData->pJPEGcurrent = pData->pJPEGbuf;
|
|
|
502 |
}
|
|
|
503 |
/* does the remaining input fit into the buffer ? */
|
|
|
504 |
if (pData->iJPEGbufremain + iRemain <= pData->iJPEGbufmax)
|
|
|
505 |
{ /* move the lot */
|
|
|
506 |
MNG_COPY ((pData->pJPEGcurrent + pData->iJPEGbufremain), pWork, iRemain);
|
|
|
507 |
|
|
|
508 |
pData->iJPEGbufremain += iRemain;/* adjust remaining_bytes counter */
|
|
|
509 |
iRemain = 0; /* and indicate there's no input left */
|
|
|
510 |
}
|
|
|
511 |
else
|
|
|
512 |
{ /* calculate what does fit */
|
|
|
513 |
mng_uint32 iFits = pData->iJPEGbufmax - pData->iJPEGbufremain;
|
|
|
514 |
|
|
|
515 |
if (iFits <= 0) /* no space is just bugger 'm all */
|
|
|
516 |
MNG_ERROR (pData, MNG_JPEGBUFTOOSMALL);
|
|
|
517 |
/* move that */
|
|
|
518 |
MNG_COPY ((pData->pJPEGcurrent + pData->iJPEGbufremain), pWork, iFits);
|
|
|
519 |
|
|
|
520 |
pData->iJPEGbufremain += iFits; /* adjust remain_bytes counter */
|
|
|
521 |
iRemain -= iFits; /* and the input-parms */
|
|
|
522 |
pWork += iFits;
|
|
|
523 |
}
|
|
|
524 |
|
|
|
525 |
#ifdef MNG_INCLUDE_IJG6B
|
|
|
526 |
pData->pJPEGdinfo->src->next_input_byte = pData->pJPEGcurrent;
|
|
|
527 |
pData->pJPEGdinfo->src->bytes_in_buffer = pData->iJPEGbufremain;
|
|
|
528 |
|
|
|
529 |
if (!pData->bJPEGhasheader) /* haven't got the header yet ? */
|
|
|
530 |
{
|
|
|
531 |
/* call jpeg_read_header() to obtain image info */
|
|
|
532 |
#ifdef MNG_SUPPORT_TRACE
|
|
|
533 |
MNG_TRACE (pData, MNG_FN_JPEG_DECOMPRESSDATA, MNG_LC_JPEG_READ_HEADER)
|
|
|
534 |
#endif
|
|
|
535 |
if (jpeg_read_header (pData->pJPEGdinfo, TRUE) != JPEG_SUSPENDED)
|
|
|
536 |
{ /* indicate the header's oke */
|
|
|
537 |
pData->bJPEGhasheader = MNG_TRUE;
|
|
|
538 |
/* let's do some sanity checks ! */
|
|
|
539 |
if ((pData->pJPEGdinfo->image_width != pData->iDatawidth ) ||
|
|
|
540 |
(pData->pJPEGdinfo->image_height != pData->iDataheight) )
|
|
|
541 |
MNG_ERROR (pData, MNG_JPEGPARMSERR);
|
|
|
542 |
|
|
|
543 |
if ( ((pData->iJHDRcolortype == MNG_COLORTYPE_JPEGGRAY ) ||
|
|
|
544 |
(pData->iJHDRcolortype == MNG_COLORTYPE_JPEGGRAYA) ) &&
|
|
|
545 |
(pData->pJPEGdinfo->jpeg_color_space != JCS_GRAYSCALE ) )
|
|
|
546 |
MNG_ERROR (pData, MNG_JPEGPARMSERR);
|
|
|
547 |
|
|
|
548 |
if ( ((pData->iJHDRcolortype == MNG_COLORTYPE_JPEGCOLOR ) ||
|
|
|
549 |
(pData->iJHDRcolortype == MNG_COLORTYPE_JPEGCOLORA) ) &&
|
|
|
550 |
(pData->pJPEGdinfo->jpeg_color_space != JCS_YCbCr ) )
|
|
|
551 |
MNG_ERROR (pData, MNG_JPEGPARMSERR);
|
|
|
552 |
/* indicate whether or not it's progressive */
|
|
|
553 |
pData->bJPEGprogressive = (mng_bool)jpeg_has_multiple_scans (pData->pJPEGdinfo);
|
|
|
554 |
/* progressive+alpha can't display "on-the-fly"!! */
|
|
|
555 |
if ((pData->bJPEGprogressive) &&
|
|
|
556 |
((pData->iJHDRcolortype == MNG_COLORTYPE_JPEGGRAYA ) ||
|
|
|
557 |
(pData->iJHDRcolortype == MNG_COLORTYPE_JPEGCOLORA) ))
|
|
|
558 |
pData->fDisplayrow = MNG_NULL;
|
|
|
559 |
/* allocate a row of JPEG-samples */
|
|
|
560 |
if (pData->pJPEGdinfo->jpeg_color_space == JCS_YCbCr)
|
|
|
561 |
pData->iJPEGrowlen = pData->pJPEGdinfo->image_width * RGB_PIXELSIZE;
|
|
|
562 |
else
|
|
|
563 |
pData->iJPEGrowlen = pData->pJPEGdinfo->image_width;
|
|
|
564 |
|
|
|
565 |
MNG_ALLOC (pData, pData->pJPEGrow, pData->iJPEGrowlen);
|
|
|
566 |
|
|
|
567 |
pData->iJPEGrgbrow = 0; /* quite empty up to now */
|
|
|
568 |
}
|
|
|
569 |
|
|
|
570 |
pData->pJPEGcurrent = (mng_uint8p)pData->pJPEGdinfo->src->next_input_byte;
|
|
|
571 |
pData->iJPEGbufremain = (mng_uint32)pData->pJPEGdinfo->src->bytes_in_buffer;
|
|
|
572 |
}
|
|
|
573 |
/* decompress not started ? */
|
|
|
574 |
if ((pData->bJPEGhasheader) && (!pData->bJPEGdecostarted))
|
|
|
575 |
{
|
|
|
576 |
/* set parameters for decompression */
|
|
|
577 |
|
|
|
578 |
if (pData->bJPEGprogressive) /* progressive display ? */
|
|
|
579 |
pData->pJPEGdinfo->buffered_image = TRUE;
|
|
|
580 |
|
|
|
581 |
/* jpeg_start_decompress(...); */
|
|
|
582 |
#ifdef MNG_SUPPORT_TRACE
|
|
|
583 |
MNG_TRACE (pData, MNG_FN_JPEG_DECOMPRESSDATA, MNG_LC_JPEG_START_DECOMPRESS)
|
|
|
584 |
#endif
|
|
|
585 |
if (jpeg_start_decompress (pData->pJPEGdinfo) == TRUE)
|
|
|
586 |
/* indicate it started */
|
|
|
587 |
pData->bJPEGdecostarted = MNG_TRUE;
|
|
|
588 |
|
|
|
589 |
pData->pJPEGcurrent = (mng_uint8p)pData->pJPEGdinfo->src->next_input_byte;
|
|
|
590 |
pData->iJPEGbufremain = (mng_uint32)pData->pJPEGdinfo->src->bytes_in_buffer;
|
|
|
591 |
}
|
|
|
592 |
/* process some scanlines ? */
|
|
|
593 |
if ((pData->bJPEGhasheader) && (pData->bJPEGdecostarted) &&
|
|
|
594 |
((!jpeg_input_complete (pData->pJPEGdinfo)) ||
|
|
|
595 |
(pData->pJPEGdinfo->output_scanline < pData->pJPEGdinfo->output_height) ||
|
|
|
596 |
((pData->bJPEGprogressive) && (pData->bJPEGscanending))))
|
|
|
597 |
{
|
|
|
598 |
mng_int32 iLines = 0;
|
|
|
599 |
|
|
|
600 |
/* for (each output pass) */
|
|
|
601 |
do
|
|
|
602 |
{ /* address the row output buffer */
|
|
|
603 |
JSAMPROW pRow = (JSAMPROW)pData->pJPEGrow;
|
|
|
604 |
|
|
|
605 |
/* init new pass ? */
|
|
|
606 |
if ((pData->bJPEGprogressive) && (!pData->bJPEGscanstarted))
|
|
|
607 |
{
|
|
|
608 |
pData->bJPEGscanstarted = MNG_TRUE;
|
|
|
609 |
|
|
|
610 |
/* adjust output decompression parameters if required */
|
|
|
611 |
/* nop */
|
|
|
612 |
|
|
|
613 |
/* start a new output pass */
|
|
|
614 |
#ifdef MNG_SUPPORT_TRACE
|
|
|
615 |
MNG_TRACE (pData, MNG_FN_JPEG_DECOMPRESSDATA, MNG_LC_JPEG_START_OUTPUT)
|
|
|
616 |
#endif
|
|
|
617 |
jpeg_start_output (pData->pJPEGdinfo, pData->pJPEGdinfo->input_scan_number);
|
|
|
618 |
|
|
|
619 |
pData->iJPEGrow = 0; /* start at row 0 in the image again */
|
|
|
620 |
}
|
|
|
621 |
|
|
|
622 |
/* while (scan lines remain to be read) */
|
|
|
623 |
if ((!pData->bJPEGprogressive) || (!pData->bJPEGscanending))
|
|
|
624 |
{
|
|
|
625 |
do
|
|
|
626 |
{
|
|
|
627 |
/* jpeg_read_scanlines(...); */
|
|
|
628 |
#ifdef MNG_SUPPORT_TRACE
|
|
|
629 |
MNG_TRACE (pData, MNG_FN_JPEG_DECOMPRESSDATA, MNG_LC_JPEG_READ_SCANLINES)
|
|
|
630 |
#endif
|
|
|
631 |
iLines = jpeg_read_scanlines (pData->pJPEGdinfo, (JSAMPARRAY)&pRow, 1);
|
|
|
632 |
|
|
|
633 |
pData->pJPEGcurrent = (mng_uint8p)pData->pJPEGdinfo->src->next_input_byte;
|
|
|
634 |
pData->iJPEGbufremain = (mng_uint32)pData->pJPEGdinfo->src->bytes_in_buffer;
|
|
|
635 |
|
|
|
636 |
if (iLines > 0) /* got something ? */
|
|
|
637 |
{
|
|
|
638 |
if (pData->fStorerow2) /* store in object ? */
|
|
|
639 |
{
|
|
|
640 |
iRetcode = ((mng_storerow)pData->fStorerow2) (pData);
|
|
|
641 |
|
|
|
642 |
if (iRetcode) /* on error bail out */
|
|
|
643 |
return iRetcode;
|
|
|
644 |
|
|
|
645 |
}
|
|
|
646 |
}
|
|
|
647 |
}
|
|
|
648 |
while ((pData->pJPEGdinfo->output_scanline < pData->pJPEGdinfo->output_height) &&
|
|
|
649 |
(iLines > 0)); /* until end-of-image or not enough input-data */
|
|
|
650 |
}
|
|
|
651 |
|
|
|
652 |
/* terminate output pass */
|
|
|
653 |
if ((pData->bJPEGprogressive) &&
|
|
|
654 |
(pData->pJPEGdinfo->output_scanline >= pData->pJPEGdinfo->output_height))
|
|
|
655 |
{
|
|
|
656 |
#ifdef MNG_SUPPORT_TRACE
|
|
|
657 |
MNG_TRACE (pData, MNG_FN_JPEG_DECOMPRESSDATA, MNG_LC_JPEG_FINISH_OUTPUT)
|
|
|
658 |
#endif
|
|
|
659 |
if (jpeg_finish_output (pData->pJPEGdinfo) != JPEG_SUSPENDED)
|
|
|
660 |
{ /* this scan has ended */
|
|
|
661 |
pData->bJPEGscanstarted = MNG_FALSE;
|
|
|
662 |
pData->bJPEGscanending = MNG_FALSE;
|
|
|
663 |
}
|
|
|
664 |
else
|
|
|
665 |
{
|
|
|
666 |
pData->bJPEGscanending = MNG_TRUE;
|
|
|
667 |
}
|
|
|
668 |
}
|
|
|
669 |
}
|
|
|
670 |
while ((!jpeg_input_complete (pData->pJPEGdinfo)) &&
|
|
|
671 |
(iLines > 0) && (!pData->bJPEGscanending));
|
|
|
672 |
}
|
|
|
673 |
/* end of image ? */
|
|
|
674 |
if ((pData->bJPEGhasheader) && (pData->bJPEGdecostarted) &&
|
|
|
675 |
(!pData->bJPEGscanending) && (jpeg_input_complete (pData->pJPEGdinfo)) &&
|
|
|
676 |
(pData->pJPEGdinfo->input_scan_number == pData->pJPEGdinfo->output_scan_number))
|
|
|
677 |
{
|
|
|
678 |
/* jpeg_finish_decompress(...); */
|
|
|
679 |
#ifdef MNG_SUPPORT_TRACE
|
|
|
680 |
MNG_TRACE (pData, MNG_FN_JPEG_DECOMPRESSDATA, MNG_LC_JPEG_FINISH_DECOMPRESS)
|
|
|
681 |
#endif
|
|
|
682 |
if (jpeg_finish_decompress (pData->pJPEGdinfo) == TRUE)
|
|
|
683 |
{ /* indicate it's done */
|
|
|
684 |
pData->bJPEGhasheader = MNG_FALSE;
|
|
|
685 |
pData->bJPEGdecostarted = MNG_FALSE;
|
|
|
686 |
pData->pJPEGcurrent = (mng_uint8p)pData->pJPEGdinfo->src->next_input_byte;
|
|
|
687 |
pData->iJPEGbufremain = (mng_uint32)pData->pJPEGdinfo->src->bytes_in_buffer;
|
|
|
688 |
/* remaining fluff is an error ! */
|
|
|
689 |
if ((pData->iJPEGbufremain > 0) || (iRemain > 0))
|
|
|
690 |
MNG_ERROR (pData, MNG_TOOMUCHJDAT);
|
|
|
691 |
}
|
|
|
692 |
}
|
|
|
693 |
#endif /* MNG_INCLUDE_IJG6B */
|
|
|
694 |
}
|
|
|
695 |
|
|
|
696 |
#ifdef MNG_SUPPORT_TRACE
|
|
|
697 |
MNG_TRACE (pData, MNG_FN_JPEG_DECOMPRESSDATA, MNG_LC_END);
|
|
|
698 |
#endif
|
|
|
699 |
|
|
|
700 |
return MNG_NOERROR;
|
|
|
701 |
}
|
|
|
702 |
#endif /* MNG_INCLUDE_JNG_READ */
|
|
|
703 |
|
|
|
704 |
/* ************************************************************************** */
|
|
|
705 |
|
|
|
706 |
#ifdef MNG_INCLUDE_JNG_READ
|
|
|
707 |
mng_retcode mngjpeg_decompressfree (mng_datap pData)
|
|
|
708 |
{
|
|
|
709 |
#if defined(MNG_INCLUDE_IJG6B) && defined(MNG_USE_SETJMP)
|
|
|
710 |
mng_retcode iRetcode;
|
|
|
711 |
#endif
|
|
|
712 |
|
|
|
713 |
#ifdef MNG_SUPPORT_TRACE
|
|
|
714 |
MNG_TRACE (pData, MNG_FN_JPEG_DECOMPRESSFREE, MNG_LC_START);
|
|
|
715 |
#endif
|
|
|
716 |
|
|
|
717 |
#ifdef MNG_INCLUDE_IJG6B
|
|
|
718 |
#ifdef MNG_USE_SETJMP
|
|
|
719 |
iRetcode = setjmp (pData->sErrorbuf);/* setup local JPEG error-recovery */
|
|
|
720 |
if (iRetcode != 0) /* got here from longjmp ? */
|
|
|
721 |
MNG_ERRORJ (pData, iRetcode); /* then IJG-lib issued an error */
|
|
|
722 |
#endif
|
|
|
723 |
/* free the row of JPEG-samples*/
|
|
|
724 |
MNG_FREE (pData, pData->pJPEGrow, pData->iJPEGrowlen);
|
|
|
725 |
|
|
|
726 |
/* release the JPEG decompression object */
|
|
|
727 |
#ifdef MNG_SUPPORT_TRACE
|
|
|
728 |
MNG_TRACE (pData, MNG_FN_JPEG_DECOMPRESSFREE, MNG_LC_JPEG_DESTROY_DECOMPRESS)
|
|
|
729 |
#endif
|
|
|
730 |
jpeg_destroy_decompress (pData->pJPEGdinfo);
|
|
|
731 |
|
|
|
732 |
pData->bJPEGdecompress = MNG_FALSE; /* indicate it's done */
|
|
|
733 |
|
|
|
734 |
#endif /* MNG_INCLUDE_IJG6B */
|
|
|
735 |
|
|
|
736 |
#ifdef MNG_SUPPORT_TRACE
|
|
|
737 |
MNG_TRACE (pData, MNG_FN_JPEG_DECOMPRESSFREE, MNG_LC_END);
|
|
|
738 |
#endif
|
|
|
739 |
|
|
|
740 |
return MNG_NOERROR;
|
|
|
741 |
}
|
|
|
742 |
#endif /* MNG_INCLUDE_JNG_READ */
|
|
|
743 |
|
|
|
744 |
/* ************************************************************************** */
|
|
|
745 |
/* * * */
|
|
|
746 |
/* * JPEG decompression routines (JDAA) * */
|
|
|
747 |
/* * * */
|
|
|
748 |
/* ************************************************************************** */
|
|
|
749 |
|
|
|
750 |
#ifdef MNG_INCLUDE_JNG_READ
|
|
|
751 |
mng_retcode mngjpeg_decompressinit2 (mng_datap pData)
|
|
|
752 |
{
|
|
|
753 |
#if defined(MNG_INCLUDE_IJG6B) && defined(MNG_USE_SETJMP)
|
|
|
754 |
mng_retcode iRetcode;
|
|
|
755 |
#endif
|
|
|
756 |
|
|
|
757 |
#ifdef MNG_SUPPORT_TRACE
|
|
|
758 |
MNG_TRACE (pData, MNG_FN_JPEG_DECOMPRESSINIT, MNG_LC_START);
|
|
|
759 |
#endif
|
|
|
760 |
|
|
|
761 |
#ifdef MNG_INCLUDE_IJG6B
|
|
|
762 |
/* allocate and initialize a JPEG decompression object */
|
|
|
763 |
pData->pJPEGdinfo2->err = jpeg_std_error (pData->pJPEGderr2);
|
|
|
764 |
|
|
|
765 |
#ifdef MNG_USE_SETJMP /* setup local JPEG error-routines */
|
|
|
766 |
pData->pJPEGderr2->error_exit = mng_error_exit;
|
|
|
767 |
pData->pJPEGderr2->output_message = mng_output_message;
|
|
|
768 |
|
|
|
769 |
iRetcode = setjmp (pData->sErrorbuf);/* setup local JPEG error-recovery */
|
|
|
770 |
if (iRetcode != 0) /* got here from longjmp ? */
|
|
|
771 |
MNG_ERRORJ (pData, iRetcode); /* then IJG-lib issued an error */
|
|
|
772 |
#endif /* MNG_USE_SETJMP */
|
|
|
773 |
|
|
|
774 |
/* allocate and initialize a JPEG decompression object (continued) */
|
|
|
775 |
#ifdef MNG_SUPPORT_TRACE
|
|
|
776 |
MNG_TRACE (pData, MNG_FN_JPEG_DECOMPRESSINIT, MNG_LC_JPEG_CREATE_DECOMPRESS)
|
|
|
777 |
#endif
|
|
|
778 |
jpeg_create_decompress (pData->pJPEGdinfo2);
|
|
|
779 |
|
|
|
780 |
pData->bJPEGdecompress2 = MNG_TRUE; /* indicate it's initialized */
|
|
|
781 |
|
|
|
782 |
/* specify the source of the compressed data (eg, a file) */
|
|
|
783 |
/* no, not a file; we have buffered input */
|
|
|
784 |
pData->pJPEGdinfo2->src = pData->pJPEGdsrc2;
|
|
|
785 |
/* use the default handler */
|
|
|
786 |
pData->pJPEGdinfo2->src->resync_to_restart = jpeg_resync_to_restart;
|
|
|
787 |
/* setup local source routine & parms */
|
|
|
788 |
pData->pJPEGdinfo2->src->init_source = mng_init_source;
|
|
|
789 |
pData->pJPEGdinfo2->src->fill_input_buffer = mng_fill_input_buffer;
|
|
|
790 |
pData->pJPEGdinfo2->src->skip_input_data = mng_skip_input_data2;
|
|
|
791 |
pData->pJPEGdinfo2->src->term_source = mng_term_source;
|
|
|
792 |
pData->pJPEGdinfo2->src->next_input_byte = pData->pJPEGcurrent2;
|
|
|
793 |
pData->pJPEGdinfo2->src->bytes_in_buffer = pData->iJPEGbufremain2;
|
|
|
794 |
|
|
|
795 |
#endif /* MNG_INCLUDE_IJG6B */
|
|
|
796 |
|
|
|
797 |
#ifdef MNG_SUPPORT_TRACE
|
|
|
798 |
MNG_TRACE (pData, MNG_FN_JPEG_DECOMPRESSINIT, MNG_LC_END);
|
|
|
799 |
#endif
|
|
|
800 |
|
|
|
801 |
return MNG_NOERROR;
|
|
|
802 |
}
|
|
|
803 |
#endif /* MNG_INCLUDE_JNG_READ */
|
|
|
804 |
|
|
|
805 |
/* ************************************************************************** */
|
|
|
806 |
|
|
|
807 |
#ifdef MNG_INCLUDE_JNG_READ
|
|
|
808 |
mng_retcode mngjpeg_decompressdata2 (mng_datap pData,
|
|
|
809 |
mng_uint32 iRawsize,
|
|
|
810 |
mng_uint8p pRawdata)
|
|
|
811 |
{
|
|
|
812 |
mng_retcode iRetcode;
|
|
|
813 |
mng_uint32 iRemain;
|
|
|
814 |
mng_uint8p pWork;
|
|
|
815 |
|
|
|
816 |
#ifdef MNG_SUPPORT_TRACE
|
|
|
817 |
MNG_TRACE (pData, MNG_FN_JPEG_DECOMPRESSDATA, MNG_LC_START);
|
|
|
818 |
#endif
|
|
|
819 |
|
|
|
820 |
#if defined (MNG_INCLUDE_IJG6B) && defined(MNG_USE_SETJMP)
|
|
|
821 |
iRetcode = setjmp (pData->sErrorbuf);/* initialize local JPEG error-recovery */
|
|
|
822 |
if (iRetcode != 0) /* got here from longjmp ? */
|
|
|
823 |
MNG_ERRORJ (pData, iRetcode); /* then IJG-lib issued an error */
|
|
|
824 |
#endif
|
|
|
825 |
|
|
|
826 |
pWork = pRawdata;
|
|
|
827 |
iRemain = iRawsize;
|
|
|
828 |
|
|
|
829 |
if (pData->iJPEGtoskip2) /* JPEG-lib told us to skip some more data ? */
|
|
|
830 |
{
|
|
|
831 |
if (iRemain > pData->iJPEGtoskip2) /* enough data in this buffer ? */
|
|
|
832 |
{
|
|
|
833 |
iRemain -= pData->iJPEGtoskip2; /* skip enough to access the next byte */
|
|
|
834 |
pWork += pData->iJPEGtoskip2;
|
|
|
835 |
|
|
|
836 |
pData->iJPEGtoskip2 = 0; /* no more to skip then */
|
|
|
837 |
}
|
|
|
838 |
else
|
|
|
839 |
{
|
|
|
840 |
pData->iJPEGtoskip2 -= iRemain; /* skip all data in the buffer */
|
|
|
841 |
iRemain = 0; /* and indicate this accordingly */
|
|
|
842 |
}
|
|
|
843 |
/* the skip set current-pointer to NULL ! */
|
|
|
844 |
pData->pJPEGcurrent2 = pData->pJPEGbuf2;
|
|
|
845 |
}
|
|
|
846 |
|
|
|
847 |
while (iRemain) /* repeat until no more input-bytes */
|
|
|
848 |
{ /* need to shift anything ? */
|
|
|
849 |
if ((pData->pJPEGcurrent2 > pData->pJPEGbuf2) &&
|
|
|
850 |
(pData->pJPEGcurrent2 - pData->pJPEGbuf2 + pData->iJPEGbufremain2 + iRemain > pData->iJPEGbufmax2))
|
|
|
851 |
{
|
|
|
852 |
if (pData->iJPEGbufremain2 > 0) /* then do so */
|
|
|
853 |
MNG_COPY (pData->pJPEGbuf2, pData->pJPEGcurrent2, pData->iJPEGbufremain2);
|
|
|
854 |
|
|
|
855 |
pData->pJPEGcurrent2 = pData->pJPEGbuf2;
|
|
|
856 |
}
|
|
|
857 |
/* does the remaining input fit into the buffer ? */
|
|
|
858 |
if (pData->iJPEGbufremain2 + iRemain <= pData->iJPEGbufmax2)
|
|
|
859 |
{ /* move the lot */
|
|
|
860 |
MNG_COPY ((pData->pJPEGcurrent2 + pData->iJPEGbufremain2), pWork, iRemain);
|
|
|
861 |
/* adjust remaining_bytes counter */
|
|
|
862 |
pData->iJPEGbufremain2 += iRemain;
|
|
|
863 |
iRemain = 0; /* and indicate there's no input left */
|
|
|
864 |
}
|
|
|
865 |
else
|
|
|
866 |
{ /* calculate what does fit */
|
|
|
867 |
mng_uint32 iFits = pData->iJPEGbufmax2 - pData->iJPEGbufremain2;
|
|
|
868 |
|
|
|
869 |
if (iFits <= 0) /* no space is just bugger 'm all */
|
|
|
870 |
MNG_ERROR (pData, MNG_JPEGBUFTOOSMALL);
|
|
|
871 |
/* move that */
|
|
|
872 |
MNG_COPY ((pData->pJPEGcurrent2 + pData->iJPEGbufremain2), pWork, iFits);
|
|
|
873 |
|
|
|
874 |
pData->iJPEGbufremain2 += iFits; /* adjust remain_bytes counter */
|
|
|
875 |
iRemain -= iFits; /* and the input-parms */
|
|
|
876 |
pWork += iFits;
|
|
|
877 |
}
|
|
|
878 |
|
|
|
879 |
#ifdef MNG_INCLUDE_IJG6B
|
|
|
880 |
pData->pJPEGdinfo2->src->next_input_byte = pData->pJPEGcurrent2;
|
|
|
881 |
pData->pJPEGdinfo2->src->bytes_in_buffer = pData->iJPEGbufremain2;
|
|
|
882 |
|
|
|
883 |
if (!pData->bJPEGhasheader2) /* haven't got the header yet ? */
|
|
|
884 |
{
|
|
|
885 |
/* call jpeg_read_header() to obtain image info */
|
|
|
886 |
#ifdef MNG_SUPPORT_TRACE
|
|
|
887 |
MNG_TRACE (pData, MNG_FN_JPEG_DECOMPRESSDATA, MNG_LC_JPEG_READ_HEADER)
|
|
|
888 |
#endif
|
|
|
889 |
if (jpeg_read_header (pData->pJPEGdinfo2, TRUE) != JPEG_SUSPENDED)
|
|
|
890 |
{ /* indicate the header's oke */
|
|
|
891 |
pData->bJPEGhasheader2 = MNG_TRUE;
|
|
|
892 |
/* let's do some sanity checks ! */
|
|
|
893 |
if ((pData->pJPEGdinfo2->image_width != pData->iDatawidth ) ||
|
|
|
894 |
(pData->pJPEGdinfo2->image_height != pData->iDataheight) )
|
|
|
895 |
MNG_ERROR (pData, MNG_JPEGPARMSERR);
|
|
|
896 |
|
|
|
897 |
if (pData->pJPEGdinfo2->jpeg_color_space != JCS_GRAYSCALE)
|
|
|
898 |
MNG_ERROR (pData, MNG_JPEGPARMSERR);
|
|
|
899 |
/* indicate whether or not it's progressive */
|
|
|
900 |
pData->bJPEGprogressive2 = (mng_bool)jpeg_has_multiple_scans (pData->pJPEGdinfo2);
|
|
|
901 |
|
|
|
902 |
if (pData->bJPEGprogressive2) /* progressive alphachannel not allowed !!! */
|
|
|
903 |
MNG_ERROR (pData, MNG_JPEGPARMSERR);
|
|
|
904 |
/* allocate a row of JPEG-samples */
|
|
|
905 |
if (pData->pJPEGdinfo2->jpeg_color_space == JCS_YCbCr)
|
|
|
906 |
pData->iJPEGrowlen2 = pData->pJPEGdinfo2->image_width * RGB_PIXELSIZE;
|
|
|
907 |
else
|
|
|
908 |
pData->iJPEGrowlen2 = pData->pJPEGdinfo2->image_width;
|
|
|
909 |
|
|
|
910 |
MNG_ALLOC (pData, pData->pJPEGrow2, pData->iJPEGrowlen2);
|
|
|
911 |
|
|
|
912 |
pData->iJPEGalpharow = 0; /* quite empty up to now */
|
|
|
913 |
}
|
|
|
914 |
|
|
|
915 |
pData->pJPEGcurrent2 = (mng_uint8p)pData->pJPEGdinfo2->src->next_input_byte;
|
|
|
916 |
pData->iJPEGbufremain2 = (mng_uint32)pData->pJPEGdinfo2->src->bytes_in_buffer;
|
|
|
917 |
}
|
|
|
918 |
/* decompress not started ? */
|
|
|
919 |
if ((pData->bJPEGhasheader2) && (!pData->bJPEGdecostarted2))
|
|
|
920 |
{
|
|
|
921 |
/* set parameters for decompression */
|
|
|
922 |
|
|
|
923 |
if (pData->bJPEGprogressive2) /* progressive display ? */
|
|
|
924 |
pData->pJPEGdinfo2->buffered_image = TRUE;
|
|
|
925 |
|
|
|
926 |
/* jpeg_start_decompress(...); */
|
|
|
927 |
#ifdef MNG_SUPPORT_TRACE
|
|
|
928 |
MNG_TRACE (pData, MNG_FN_JPEG_DECOMPRESSDATA, MNG_LC_JPEG_START_DECOMPRESS)
|
|
|
929 |
#endif
|
|
|
930 |
if (jpeg_start_decompress (pData->pJPEGdinfo2) == TRUE)
|
|
|
931 |
/* indicate it started */
|
|
|
932 |
pData->bJPEGdecostarted2 = MNG_TRUE;
|
|
|
933 |
|
|
|
934 |
pData->pJPEGcurrent2 = (mng_uint8p)pData->pJPEGdinfo2->src->next_input_byte;
|
|
|
935 |
pData->iJPEGbufremain2 = (mng_uint32)pData->pJPEGdinfo2->src->bytes_in_buffer;
|
|
|
936 |
}
|
|
|
937 |
/* process some scanlines ? */
|
|
|
938 |
if ((pData->bJPEGhasheader2) && (pData->bJPEGdecostarted2) &&
|
|
|
939 |
((!jpeg_input_complete (pData->pJPEGdinfo2)) ||
|
|
|
940 |
(pData->pJPEGdinfo2->output_scanline < pData->pJPEGdinfo2->output_height)))
|
|
|
941 |
{
|
|
|
942 |
mng_int32 iLines;
|
|
|
943 |
|
|
|
944 |
/* for (each output pass) */
|
|
|
945 |
do
|
|
|
946 |
{ /* address the row output buffer */
|
|
|
947 |
JSAMPROW pRow = (JSAMPROW)pData->pJPEGrow2;
|
|
|
948 |
|
|
|
949 |
/* init new pass ? */
|
|
|
950 |
if ((pData->bJPEGprogressive2) &&
|
|
|
951 |
((!pData->bJPEGscanstarted2) ||
|
|
|
952 |
(pData->pJPEGdinfo2->output_scanline >= pData->pJPEGdinfo2->output_height)))
|
|
|
953 |
{
|
|
|
954 |
pData->bJPEGscanstarted2 = MNG_TRUE;
|
|
|
955 |
|
|
|
956 |
/* adjust output decompression parameters if required */
|
|
|
957 |
/* nop */
|
|
|
958 |
|
|
|
959 |
/* start a new output pass */
|
|
|
960 |
#ifdef MNG_SUPPORT_TRACE
|
|
|
961 |
MNG_TRACE (pData, MNG_FN_JPEG_DECOMPRESSDATA, MNG_LC_JPEG_START_OUTPUT)
|
|
|
962 |
#endif
|
|
|
963 |
jpeg_start_output (pData->pJPEGdinfo2, pData->pJPEGdinfo2->input_scan_number);
|
|
|
964 |
|
|
|
965 |
pData->iJPEGrow = 0; /* start at row 0 in the image again */
|
|
|
966 |
}
|
|
|
967 |
|
|
|
968 |
/* while (scan lines remain to be read) */
|
|
|
969 |
do
|
|
|
970 |
{
|
|
|
971 |
/* jpeg_read_scanlines(...); */
|
|
|
972 |
#ifdef MNG_SUPPORT_TRACE
|
|
|
973 |
MNG_TRACE (pData, MNG_FN_JPEG_DECOMPRESSDATA, MNG_LC_JPEG_READ_SCANLINES)
|
|
|
974 |
#endif
|
|
|
975 |
iLines = jpeg_read_scanlines (pData->pJPEGdinfo2, (JSAMPARRAY)&pRow, 1);
|
|
|
976 |
|
|
|
977 |
pData->pJPEGcurrent2 = (mng_uint8p)pData->pJPEGdinfo2->src->next_input_byte;
|
|
|
978 |
pData->iJPEGbufremain2 = (mng_uint32)pData->pJPEGdinfo2->src->bytes_in_buffer;
|
|
|
979 |
|
|
|
980 |
if (iLines > 0) /* got something ? */
|
|
|
981 |
{
|
|
|
982 |
if (pData->fStorerow3) /* store in object ? */
|
|
|
983 |
{
|
|
|
984 |
iRetcode = ((mng_storerow)pData->fStorerow3) (pData);
|
|
|
985 |
|
|
|
986 |
if (iRetcode) /* on error bail out */
|
|
|
987 |
return iRetcode;
|
|
|
988 |
|
|
|
989 |
}
|
|
|
990 |
}
|
|
|
991 |
}
|
|
|
992 |
while ((pData->pJPEGdinfo2->output_scanline < pData->pJPEGdinfo2->output_height) &&
|
|
|
993 |
(iLines > 0)); /* until end-of-image or not enough input-data */
|
|
|
994 |
|
|
|
995 |
/* terminate output pass */
|
|
|
996 |
if ((pData->bJPEGprogressive2) &&
|
|
|
997 |
(pData->pJPEGdinfo2->output_scanline >= pData->pJPEGdinfo2->output_height))
|
|
|
998 |
{
|
|
|
999 |
#ifdef MNG_SUPPORT_TRACE
|
|
|
1000 |
MNG_TRACE (pData, MNG_FN_JPEG_DECOMPRESSDATA, MNG_LC_JPEG_FINISH_OUTPUT)
|
|
|
1001 |
#endif
|
|
|
1002 |
if (jpeg_finish_output (pData->pJPEGdinfo2) == JPEG_SUSPENDED)
|
|
|
1003 |
jpeg_finish_output (pData->pJPEGdinfo2);
|
|
|
1004 |
/* this scan has ended */
|
|
|
1005 |
pData->bJPEGscanstarted2 = MNG_FALSE;
|
|
|
1006 |
}
|
|
|
1007 |
}
|
|
|
1008 |
while ((!jpeg_input_complete (pData->pJPEGdinfo2)) && (iLines > 0));
|
|
|
1009 |
}
|
|
|
1010 |
/* end of image ? */
|
|
|
1011 |
if ((pData->bJPEGhasheader2) && (pData->bJPEGdecostarted2) &&
|
|
|
1012 |
(jpeg_input_complete (pData->pJPEGdinfo2)) &&
|
|
|
1013 |
(pData->pJPEGdinfo2->input_scan_number == pData->pJPEGdinfo2->output_scan_number))
|
|
|
1014 |
{
|
|
|
1015 |
/* jpeg_finish_decompress(...); */
|
|
|
1016 |
#ifdef MNG_SUPPORT_TRACE
|
|
|
1017 |
MNG_TRACE (pData, MNG_FN_JPEG_DECOMPRESSDATA, MNG_LC_JPEG_FINISH_DECOMPRESS)
|
|
|
1018 |
#endif
|
|
|
1019 |
if (jpeg_finish_decompress (pData->pJPEGdinfo2) == TRUE)
|
|
|
1020 |
{ /* indicate it's done */
|
|
|
1021 |
pData->bJPEGhasheader2 = MNG_FALSE;
|
|
|
1022 |
pData->bJPEGdecostarted2 = MNG_FALSE;
|
|
|
1023 |
pData->pJPEGcurrent2 = (mng_uint8p)pData->pJPEGdinfo2->src->next_input_byte;
|
|
|
1024 |
pData->iJPEGbufremain2 = (mng_uint32)pData->pJPEGdinfo2->src->bytes_in_buffer;
|
|
|
1025 |
/* remaining fluff is an error ! */
|
|
|
1026 |
if ((pData->iJPEGbufremain2 > 0) || (iRemain > 0))
|
|
|
1027 |
MNG_ERROR (pData, MNG_TOOMUCHJDAT);
|
|
|
1028 |
}
|
|
|
1029 |
}
|
|
|
1030 |
#endif /* MNG_INCLUDE_IJG6B */
|
|
|
1031 |
}
|
|
|
1032 |
|
|
|
1033 |
#ifdef MNG_SUPPORT_TRACE
|
|
|
1034 |
MNG_TRACE (pData, MNG_FN_JPEG_DECOMPRESSDATA, MNG_LC_END);
|
|
|
1035 |
#endif
|
|
|
1036 |
|
|
|
1037 |
return MNG_NOERROR;
|
|
|
1038 |
}
|
|
|
1039 |
#endif /* MNG_INCLUDE_JNG_READ */
|
|
|
1040 |
|
|
|
1041 |
/* ************************************************************************** */
|
|
|
1042 |
|
|
|
1043 |
#ifdef MNG_INCLUDE_JNG_READ
|
|
|
1044 |
mng_retcode mngjpeg_decompressfree2 (mng_datap pData)
|
|
|
1045 |
{
|
|
|
1046 |
#if defined(MNG_INCLUDE_IJG6B) && defined(MNG_USE_SETJMP)
|
|
|
1047 |
mng_retcode iRetcode;
|
|
|
1048 |
#endif
|
|
|
1049 |
|
|
|
1050 |
#ifdef MNG_SUPPORT_TRACE
|
|
|
1051 |
MNG_TRACE (pData, MNG_FN_JPEG_DECOMPRESSFREE, MNG_LC_START);
|
|
|
1052 |
#endif
|
|
|
1053 |
|
|
|
1054 |
#ifdef MNG_INCLUDE_IJG6B
|
|
|
1055 |
#ifdef MNG_USE_SETJMP
|
|
|
1056 |
iRetcode = setjmp (pData->sErrorbuf);/* setup local JPEG error-recovery */
|
|
|
1057 |
if (iRetcode != 0) /* got here from longjmp ? */
|
|
|
1058 |
MNG_ERRORJ (pData, iRetcode); /* then IJG-lib issued an error */
|
|
|
1059 |
#endif
|
|
|
1060 |
/* free the row of JPEG-samples*/
|
|
|
1061 |
MNG_FREE (pData, pData->pJPEGrow2, pData->iJPEGrowlen2);
|
|
|
1062 |
|
|
|
1063 |
/* release the JPEG decompression object */
|
|
|
1064 |
#ifdef MNG_SUPPORT_TRACE
|
|
|
1065 |
MNG_TRACE (pData, MNG_FN_JPEG_DECOMPRESSFREE, MNG_LC_JPEG_DESTROY_DECOMPRESS)
|
|
|
1066 |
#endif
|
|
|
1067 |
jpeg_destroy_decompress (pData->pJPEGdinfo2);
|
|
|
1068 |
|
|
|
1069 |
pData->bJPEGdecompress2 = MNG_FALSE; /* indicate it's done */
|
|
|
1070 |
|
|
|
1071 |
#endif /* MNG_INCLUDE_IJG6B */
|
|
|
1072 |
|
|
|
1073 |
#ifdef MNG_SUPPORT_TRACE
|
|
|
1074 |
MNG_TRACE (pData, MNG_FN_JPEG_DECOMPRESSFREE, MNG_LC_END);
|
|
|
1075 |
#endif
|
|
|
1076 |
|
|
|
1077 |
return MNG_NOERROR;
|
|
|
1078 |
}
|
|
|
1079 |
#endif /* MNG_INCLUDE_JNG_READ */
|
|
|
1080 |
|
|
|
1081 |
/* ************************************************************************** */
|
|
|
1082 |
|
|
|
1083 |
#endif /* MNG_INCLUDE_JNG && MNG_INCLUDE_DISPLAY_PROCS */
|
|
|
1084 |
|
|
|
1085 |
/* ************************************************************************** */
|
|
|
1086 |
/* * end of file * */
|
|
|
1087 |
/* ************************************************************************** */
|
|
|
1088 |
|