/*
+ * Copyright (c) 2002-2007, Communications and Remote Sensing Laboratory, Universite catholique de Louvain (UCL), Belgium
+ * Copyright (c) 2002-2007, Professor Benoit Macq
* Copyright (c) 2001-2003, David Janssens
* Copyright (c) 2002-2003, Yannick Verschueren
- * Copyright (c) 2003-2005, Francois Devaux and Antonin Descampe
- * Copyright (c) 2005, Herv� Drolon, FreeImage Team
- * Copyright (c) 2002-2005, Communications and remote sensing Laboratory, Universite catholique de Louvain, Belgium
+ * Copyright (c) 2003-2007, Francois-Olivier Devaux and Antonin Descampe
+ * Copyright (c) 2005, Herve Drolon, FreeImage Team
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* POSSIBILITY OF SUCH DAMAGE.
*/
-
#include "opj_includes.h"
/* ----------------------------------------------------------------------- */
-opj_cio_t* opj_cio_open(opj_common_ptr cinfo, unsigned char *buffer, int length) {
- opj_cp_t *cp = NULL;
- opj_cio_t *cio = (opj_cio_t*)opj_malloc(sizeof(opj_cio_t));
- if(!cio) return NULL;
- cio->cinfo = cinfo;
- if(buffer && length) {
- /* wrap a user buffer containing the encoded image */
- cio->openmode = OPJ_STREAM_READ;
- cio->buffer = buffer;
- cio->length = length;
- }
- else if(!buffer && !length && cinfo) {
- /* allocate a buffer for the encoded image */
- cio->openmode = OPJ_STREAM_WRITE;
- switch(cinfo->codec_format) {
- case CODEC_J2K:
- cp = ((opj_j2k_t*)cinfo->j2k_handle)->cp;
- break;
- case CODEC_JP2:
- cp = ((opj_jp2_t*)cinfo->jp2_handle)->j2k->cp;
- break;
- default:
- opj_free(cio);
- return NULL;
- }
- cio->length = cp->tdx * cp->tdy * cp->tw * cp->th * 2;
- cio->buffer = (unsigned char *)opj_malloc(cio->length);
- if(!cio->buffer) {
- opj_free(cio);
- return NULL;
- }
- }
- else {
- opj_free(cio);
- return NULL;
- }
-
- /* Initialize byte IO */
- cio->start = cio->buffer;
- cio->end = cio->buffer + cio->length;
- cio->bp = cio->buffer;
-
- return cio;
+opj_cio_t* OPJ_CALLCONV opj_cio_open(opj_common_ptr cinfo, unsigned char *buffer, int length) {
+ opj_cp_t *cp = NULL;
+ opj_cio_t *cio = (opj_cio_t*)opj_malloc(sizeof(opj_cio_t));
+ if(!cio) return NULL;
+ cio->cinfo = cinfo;
+ if(buffer && length) {
+ /* wrap a user buffer containing the encoded image */
+ cio->openmode = OPJ_STREAM_READ;
+ cio->buffer = buffer;
+ cio->length = length;
+ }
+ else if(!buffer && !length && cinfo) {
+ /* allocate a buffer for the encoded image */
+ cio->openmode = OPJ_STREAM_WRITE;
+ switch(cinfo->codec_format) {
+ case CODEC_J2K:
+ cp = ((opj_j2k_t*)cinfo->j2k_handle)->cp;
+ break;
+ case CODEC_JP2:
+ cp = ((opj_jp2_t*)cinfo->jp2_handle)->j2k->cp;
+ break;
+ default:
+ opj_free(cio);
+ return NULL;
+ }
+ cio->length = (unsigned int) (0.1625 * cp->img_size + 2000); /* 0.1625 = 1.3/8 and 2000 bytes as a minimum for headers */
+ cio->buffer = (unsigned char *)opj_malloc(cio->length);
+ if(!cio->buffer) {
+ opj_event_msg(cio->cinfo, EVT_ERROR, "Error allocating memory for compressed bitstream\n");
+ opj_free(cio);
+ return NULL;
+ }
+ }
+ else {
+ opj_free(cio);
+ return NULL;
+ }
+
+ /* Initialize byte IO */
+ cio->start = cio->buffer;
+ cio->end = cio->buffer + cio->length;
+ cio->bp = cio->buffer;
+
+ return cio;
}
-void opj_cio_close(opj_cio_t *cio) {
- if(cio) {
- if(cio->openmode == OPJ_STREAM_WRITE) {
- /* destroy the allocated buffer */
- opj_free(cio->buffer);
- }
- /* destroy the cio */
- opj_free(cio);
- }
+void OPJ_CALLCONV opj_cio_close(opj_cio_t *cio) {
+ if(cio) {
+ if(cio->openmode == OPJ_STREAM_WRITE) {
+ /* destroy the allocated buffer */
+ opj_free(cio->buffer);
+ }
+ /* destroy the cio */
+ opj_free(cio);
+ }
}
/*
* Get position in byte stream.
*/
-int cio_tell(opj_cio_t *cio) {
- return cio->bp - cio->start;
+int OPJ_CALLCONV cio_tell(opj_cio_t *cio) {
+ return cio->bp - cio->start;
}
/*
*
* pos : position, in number of bytes, from the beginning of the stream
*/
-void cio_seek(opj_cio_t *cio, int pos) {
- cio->bp = cio->start + pos;
+void OPJ_CALLCONV cio_seek(opj_cio_t *cio, int pos) {
+ cio->bp = cio->start + pos;
}
/*
* Number of bytes left before the end of the stream.
*/
int cio_numbytesleft(opj_cio_t *cio) {
- return cio->end - cio->bp;
+ return cio->end - cio->bp;
}
/*
* Get pointer to the current position in the stream.
*/
unsigned char *cio_getbp(opj_cio_t *cio) {
- return cio->bp;
+ return cio->bp;
}
/*
* Write a byte.
*/
bool cio_byteout(opj_cio_t *cio, unsigned char v) {
- if (cio->bp >= cio->end) {
- opg_event_msg(cio->cinfo, EVT_ERROR, "write error\n");
- return false;
- }
- *cio->bp++ = v;
- return true;
+ if (cio->bp >= cio->end) {
+ opj_event_msg(cio->cinfo, EVT_ERROR, "write error\n");
+ return false;
+ }
+ *cio->bp++ = v;
+ return true;
}
/*
* Read a byte.
*/
unsigned char cio_bytein(opj_cio_t *cio) {
- if (cio->bp >= cio->end) {
- opg_event_msg(cio->cinfo, EVT_ERROR, "read error\n");
- return 0;
- }
- return *cio->bp++;
+ if (cio->bp >= cio->end) {
+ opj_event_msg(cio->cinfo, EVT_ERROR, "read error: passed the end of the codestream (start = %d, current = %d, end = %d\n", cio->start, cio->bp, cio->end);
+ return 0;
+ }
+ return *cio->bp++;
}
/*
* n : number of bytes to write
*/
unsigned int cio_write(opj_cio_t *cio, unsigned int v, int n) {
- int i;
- for (i = n - 1; i >= 0; i--) {
- if( !cio_byteout(cio, (unsigned char) ((v >> (i << 3)) & 0xff)) )
- return 0;
- }
- return n;
+ int i;
+ for (i = n - 1; i >= 0; i--) {
+ if( !cio_byteout(cio, (unsigned char) ((v >> (i << 3)) & 0xff)) )
+ return 0;
+ }
+ return n;
}
/*
* return : value of the n bytes read
*/
unsigned int cio_read(opj_cio_t *cio, int n) {
- int i;
- unsigned int v;
- v = 0;
- for (i = n - 1; i >= 0; i--) {
- v += cio_bytein(cio) << (i << 3);
- }
- return v;
+ int i;
+ unsigned int v;
+ v = 0;
+ for (i = n - 1; i >= 0; i--) {
+ v += cio_bytein(cio) << (i << 3);
+ }
+ return v;
}
/*
* n : number of bytes to skip
*/
void cio_skip(opj_cio_t *cio, int n) {
- cio->bp += n;
+ cio->bp += n;
}
projects / openjpeg.git / blobdiff