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opencv/3rdparty/openjpeg/openjp2/cio.c

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3rdparty: add OpenJPEG library source code (tag v2.3.1) - https://github.com/uclouvain/openjpeg/releases/tag/v2.3.1 - src/lib/openjp2 - readme files
4 years ago
/*
* The copyright in this software is being made available under the 2-clauses
* BSD License, included below. This software may be subject to other third
* party and contributor rights, including patent rights, and no such rights
* are granted under this license.
*
* Copyright (c) 2002-2014, Universite catholique de Louvain (UCL), Belgium
* Copyright (c) 2002-2014, Professor Benoit Macq
* Copyright (c) 2001-2003, David Janssens
* Copyright (c) 2002-2003, Yannick Verschueren
* Copyright (c) 2003-2007, Francois-Olivier Devaux
* Copyright (c) 2003-2014, Antonin Descampe
* Copyright (c) 2005, Herve Drolon, FreeImage Team
* Copyright (c) 2008, 2011-2012, Centre National d'Etudes Spatiales (CNES), FR
* Copyright (c) 2012, CS Systemes d'Information, France
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS `AS IS'
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*/
#include "opj_includes.h"
/* ----------------------------------------------------------------------- */
/* ----------------------------------------------------------------------- */
void opj_write_bytes_BE(OPJ_BYTE * p_buffer, OPJ_UINT32 p_value,
OPJ_UINT32 p_nb_bytes)
{
const OPJ_BYTE * l_data_ptr = ((const OPJ_BYTE *) &p_value) + sizeof(
OPJ_UINT32) - p_nb_bytes;
assert(p_nb_bytes > 0 && p_nb_bytes <= sizeof(OPJ_UINT32));
memcpy(p_buffer, l_data_ptr, p_nb_bytes);
}
void opj_write_bytes_LE(OPJ_BYTE * p_buffer, OPJ_UINT32 p_value,
OPJ_UINT32 p_nb_bytes)
{
const OPJ_BYTE * l_data_ptr = ((const OPJ_BYTE *) &p_value) + p_nb_bytes - 1;
OPJ_UINT32 i;
assert(p_nb_bytes > 0 && p_nb_bytes <= sizeof(OPJ_UINT32));
for (i = 0; i < p_nb_bytes; ++i) {
*(p_buffer++) = *(l_data_ptr--);
}
}
void opj_read_bytes_BE(const OPJ_BYTE * p_buffer, OPJ_UINT32 * p_value,
OPJ_UINT32 p_nb_bytes)
{
OPJ_BYTE * l_data_ptr = ((OPJ_BYTE *) p_value);
assert(p_nb_bytes > 0 && p_nb_bytes <= sizeof(OPJ_UINT32));
*p_value = 0;
memcpy(l_data_ptr + sizeof(OPJ_UINT32) - p_nb_bytes, p_buffer, p_nb_bytes);
}
void opj_read_bytes_LE(const OPJ_BYTE * p_buffer, OPJ_UINT32 * p_value,
OPJ_UINT32 p_nb_bytes)
{
OPJ_BYTE * l_data_ptr = ((OPJ_BYTE *) p_value) + p_nb_bytes - 1;
OPJ_UINT32 i;
assert(p_nb_bytes > 0 && p_nb_bytes <= sizeof(OPJ_UINT32));
*p_value = 0;
for (i = 0; i < p_nb_bytes; ++i) {
*(l_data_ptr--) = *(p_buffer++);
}
}
void opj_write_double_BE(OPJ_BYTE * p_buffer, OPJ_FLOAT64 p_value)
{
const OPJ_BYTE * l_data_ptr = ((const OPJ_BYTE *) &p_value);
memcpy(p_buffer, l_data_ptr, sizeof(OPJ_FLOAT64));
}
void opj_write_double_LE(OPJ_BYTE * p_buffer, OPJ_FLOAT64 p_value)
{
const OPJ_BYTE * l_data_ptr = ((const OPJ_BYTE *) &p_value) + sizeof(
OPJ_FLOAT64) - 1;
OPJ_UINT32 i;
for (i = 0; i < sizeof(OPJ_FLOAT64); ++i) {
*(p_buffer++) = *(l_data_ptr--);
}
}
void opj_read_double_BE(const OPJ_BYTE * p_buffer, OPJ_FLOAT64 * p_value)
{
OPJ_BYTE * l_data_ptr = ((OPJ_BYTE *) p_value);
memcpy(l_data_ptr, p_buffer, sizeof(OPJ_FLOAT64));
}
void opj_read_double_LE(const OPJ_BYTE * p_buffer, OPJ_FLOAT64 * p_value)
{
OPJ_BYTE * l_data_ptr = ((OPJ_BYTE *) p_value) + sizeof(OPJ_FLOAT64) - 1;
OPJ_UINT32 i;
for (i = 0; i < sizeof(OPJ_FLOAT64); ++i) {
*(l_data_ptr--) = *(p_buffer++);
}
}
void opj_write_float_BE(OPJ_BYTE * p_buffer, OPJ_FLOAT32 p_value)
{
const OPJ_BYTE * l_data_ptr = ((const OPJ_BYTE *) &p_value);
memcpy(p_buffer, l_data_ptr, sizeof(OPJ_FLOAT32));
}
void opj_write_float_LE(OPJ_BYTE * p_buffer, OPJ_FLOAT32 p_value)
{
const OPJ_BYTE * l_data_ptr = ((const OPJ_BYTE *) &p_value) + sizeof(
OPJ_FLOAT32) - 1;
OPJ_UINT32 i;
for (i = 0; i < sizeof(OPJ_FLOAT32); ++i) {
*(p_buffer++) = *(l_data_ptr--);
}
}
void opj_read_float_BE(const OPJ_BYTE * p_buffer, OPJ_FLOAT32 * p_value)
{
OPJ_BYTE * l_data_ptr = ((OPJ_BYTE *) p_value);
memcpy(l_data_ptr, p_buffer, sizeof(OPJ_FLOAT32));
}
void opj_read_float_LE(const OPJ_BYTE * p_buffer, OPJ_FLOAT32 * p_value)
{
OPJ_BYTE * l_data_ptr = ((OPJ_BYTE *) p_value) + sizeof(OPJ_FLOAT32) - 1;
OPJ_UINT32 i;
for (i = 0; i < sizeof(OPJ_FLOAT32); ++i) {
*(l_data_ptr--) = *(p_buffer++);
}
}
opj_stream_t* OPJ_CALLCONV opj_stream_create(OPJ_SIZE_T p_buffer_size,
OPJ_BOOL l_is_input)
{
opj_stream_private_t * l_stream = 00;
l_stream = (opj_stream_private_t*) opj_calloc(1, sizeof(opj_stream_private_t));
if (! l_stream) {
return 00;
}
l_stream->m_buffer_size = p_buffer_size;
l_stream->m_stored_data = (OPJ_BYTE *) opj_malloc(p_buffer_size);
if (! l_stream->m_stored_data) {
opj_free(l_stream);
return 00;
}
l_stream->m_current_data = l_stream->m_stored_data;
if (l_is_input) {
l_stream->m_status |= OPJ_STREAM_STATUS_INPUT;
l_stream->m_opj_skip = opj_stream_read_skip;
l_stream->m_opj_seek = opj_stream_read_seek;
} else {
l_stream->m_status |= OPJ_STREAM_STATUS_OUTPUT;
l_stream->m_opj_skip = opj_stream_write_skip;
l_stream->m_opj_seek = opj_stream_write_seek;
}
l_stream->m_read_fn = opj_stream_default_read;
l_stream->m_write_fn = opj_stream_default_write;
l_stream->m_skip_fn = opj_stream_default_skip;
l_stream->m_seek_fn = opj_stream_default_seek;
return (opj_stream_t *) l_stream;
}
opj_stream_t* OPJ_CALLCONV opj_stream_default_create(OPJ_BOOL l_is_input)
{
return opj_stream_create(OPJ_J2K_STREAM_CHUNK_SIZE, l_is_input);
}
void OPJ_CALLCONV opj_stream_destroy(opj_stream_t* p_stream)
{
opj_stream_private_t* l_stream = (opj_stream_private_t*) p_stream;
if (l_stream) {
if (l_stream->m_free_user_data_fn) {
l_stream->m_free_user_data_fn(l_stream->m_user_data);
}
opj_free(l_stream->m_stored_data);
l_stream->m_stored_data = 00;
opj_free(l_stream);
}
}
void OPJ_CALLCONV opj_stream_set_read_function(opj_stream_t* p_stream,
opj_stream_read_fn p_function)
{
opj_stream_private_t* l_stream = (opj_stream_private_t*) p_stream;
if ((!l_stream) || (!(l_stream->m_status & OPJ_STREAM_STATUS_INPUT))) {
return;
}
l_stream->m_read_fn = p_function;
}
void OPJ_CALLCONV opj_stream_set_seek_function(opj_stream_t* p_stream,
opj_stream_seek_fn p_function)
{
opj_stream_private_t* l_stream = (opj_stream_private_t*) p_stream;
if (!l_stream) {
return;
}
l_stream->m_seek_fn = p_function;
}
void OPJ_CALLCONV opj_stream_set_write_function(opj_stream_t* p_stream,
opj_stream_write_fn p_function)
{
opj_stream_private_t* l_stream = (opj_stream_private_t*) p_stream;
if ((!l_stream) || (!(l_stream->m_status & OPJ_STREAM_STATUS_OUTPUT))) {
return;
}
l_stream->m_write_fn = p_function;
}
void OPJ_CALLCONV opj_stream_set_skip_function(opj_stream_t* p_stream,
opj_stream_skip_fn p_function)
{
opj_stream_private_t* l_stream = (opj_stream_private_t*) p_stream;
if (! l_stream) {
return;
}
l_stream->m_skip_fn = p_function;
}
void OPJ_CALLCONV opj_stream_set_user_data(opj_stream_t* p_stream,
void * p_data, opj_stream_free_user_data_fn p_function)
{
opj_stream_private_t* l_stream = (opj_stream_private_t*) p_stream;
if (!l_stream) {
return;
}
l_stream->m_user_data = p_data;
l_stream->m_free_user_data_fn = p_function;
}
void OPJ_CALLCONV opj_stream_set_user_data_length(opj_stream_t* p_stream,
OPJ_UINT64 data_length)
{
opj_stream_private_t* l_stream = (opj_stream_private_t*) p_stream;
if (!l_stream) {
return;
}
l_stream->m_user_data_length = data_length;
}
OPJ_SIZE_T opj_stream_read_data(opj_stream_private_t * p_stream,
OPJ_BYTE * p_buffer, OPJ_SIZE_T p_size, opj_event_mgr_t * p_event_mgr)
{
OPJ_SIZE_T l_read_nb_bytes = 0;
if (p_stream->m_bytes_in_buffer >= p_size) {
memcpy(p_buffer, p_stream->m_current_data, p_size);
p_stream->m_current_data += p_size;
p_stream->m_bytes_in_buffer -= p_size;
l_read_nb_bytes += p_size;
p_stream->m_byte_offset += (OPJ_OFF_T)p_size;
return l_read_nb_bytes;
}
/* we are now in the case when the remaining data if not sufficient */
if (p_stream->m_status & OPJ_STREAM_STATUS_END) {
l_read_nb_bytes += p_stream->m_bytes_in_buffer;
memcpy(p_buffer, p_stream->m_current_data, p_stream->m_bytes_in_buffer);
p_stream->m_current_data += p_stream->m_bytes_in_buffer;
p_stream->m_byte_offset += (OPJ_OFF_T)p_stream->m_bytes_in_buffer;
p_stream->m_bytes_in_buffer = 0;
return l_read_nb_bytes ? l_read_nb_bytes : (OPJ_SIZE_T) - 1;
}
/* the flag is not set, we copy data and then do an actual read on the stream */
if (p_stream->m_bytes_in_buffer) {
l_read_nb_bytes += p_stream->m_bytes_in_buffer;
memcpy(p_buffer, p_stream->m_current_data, p_stream->m_bytes_in_buffer);
p_stream->m_current_data = p_stream->m_stored_data;
p_buffer += p_stream->m_bytes_in_buffer;
p_size -= p_stream->m_bytes_in_buffer;
p_stream->m_byte_offset += (OPJ_OFF_T)p_stream->m_bytes_in_buffer;
p_stream->m_bytes_in_buffer = 0;
} else {
/* case where we are already at the end of the buffer
so reset the m_current_data to point to the start of the
stored buffer to get ready to read from disk*/
p_stream->m_current_data = p_stream->m_stored_data;
}
for (;;) {
/* we should read less than a chunk -> read a chunk */
if (p_size < p_stream->m_buffer_size) {
/* we should do an actual read on the media */
p_stream->m_bytes_in_buffer = p_stream->m_read_fn(p_stream->m_stored_data,
p_stream->m_buffer_size, p_stream->m_user_data);
if (p_stream->m_bytes_in_buffer == (OPJ_SIZE_T) - 1) {
/* end of stream */
opj_event_msg(p_event_mgr, EVT_INFO, "Stream reached its end !\n");
p_stream->m_bytes_in_buffer = 0;
p_stream->m_status |= OPJ_STREAM_STATUS_END;
/* end of stream */
return l_read_nb_bytes ? l_read_nb_bytes : (OPJ_SIZE_T) - 1;
} else if (p_stream->m_bytes_in_buffer < p_size) {
/* not enough data */
l_read_nb_bytes += p_stream->m_bytes_in_buffer;
memcpy(p_buffer, p_stream->m_current_data, p_stream->m_bytes_in_buffer);
p_stream->m_current_data = p_stream->m_stored_data;
p_buffer += p_stream->m_bytes_in_buffer;
p_size -= p_stream->m_bytes_in_buffer;
p_stream->m_byte_offset += (OPJ_OFF_T)p_stream->m_bytes_in_buffer;
p_stream->m_bytes_in_buffer = 0;
} else {
l_read_nb_bytes += p_size;
memcpy(p_buffer, p_stream->m_current_data, p_size);
p_stream->m_current_data += p_size;
p_stream->m_bytes_in_buffer -= p_size;
p_stream->m_byte_offset += (OPJ_OFF_T)p_size;
return l_read_nb_bytes;
}
} else {
/* direct read on the dest buffer */
p_stream->m_bytes_in_buffer = p_stream->m_read_fn(p_buffer, p_size,
p_stream->m_user_data);
if (p_stream->m_bytes_in_buffer == (OPJ_SIZE_T) - 1) {
/* end of stream */
opj_event_msg(p_event_mgr, EVT_INFO, "Stream reached its end !\n");
p_stream->m_bytes_in_buffer = 0;
p_stream->m_status |= OPJ_STREAM_STATUS_END;
/* end of stream */
return l_read_nb_bytes ? l_read_nb_bytes : (OPJ_SIZE_T) - 1;
} else if (p_stream->m_bytes_in_buffer < p_size) {
/* not enough data */
l_read_nb_bytes += p_stream->m_bytes_in_buffer;
p_stream->m_current_data = p_stream->m_stored_data;
p_buffer += p_stream->m_bytes_in_buffer;
p_size -= p_stream->m_bytes_in_buffer;
p_stream->m_byte_offset += (OPJ_OFF_T)p_stream->m_bytes_in_buffer;
p_stream->m_bytes_in_buffer = 0;
} else {
/* we have read the exact size */
l_read_nb_bytes += p_stream->m_bytes_in_buffer;
p_stream->m_byte_offset += (OPJ_OFF_T)p_stream->m_bytes_in_buffer;
p_stream->m_current_data = p_stream->m_stored_data;
p_stream->m_bytes_in_buffer = 0;
return l_read_nb_bytes;
}
}
}
}
OPJ_SIZE_T opj_stream_write_data(opj_stream_private_t * p_stream,
const OPJ_BYTE * p_buffer,
OPJ_SIZE_T p_size,
opj_event_mgr_t * p_event_mgr)
{
OPJ_SIZE_T l_remaining_bytes = 0;
OPJ_SIZE_T l_write_nb_bytes = 0;
if (p_stream->m_status & OPJ_STREAM_STATUS_ERROR) {
return (OPJ_SIZE_T) - 1;
}
for (;;) {
l_remaining_bytes = p_stream->m_buffer_size - p_stream->m_bytes_in_buffer;
/* we have more memory than required */
if (l_remaining_bytes >= p_size) {
memcpy(p_stream->m_current_data, p_buffer, p_size);
p_stream->m_current_data += p_size;
p_stream->m_bytes_in_buffer += p_size;
l_write_nb_bytes += p_size;
p_stream->m_byte_offset += (OPJ_OFF_T)p_size;
return l_write_nb_bytes;
}
/* we copy data and then do an actual read on the stream */
if (l_remaining_bytes) {
l_write_nb_bytes += l_remaining_bytes;
memcpy(p_stream->m_current_data, p_buffer, l_remaining_bytes);
p_stream->m_current_data = p_stream->m_stored_data;
p_buffer += l_remaining_bytes;
p_size -= l_remaining_bytes;
p_stream->m_bytes_in_buffer += l_remaining_bytes;
p_stream->m_byte_offset += (OPJ_OFF_T)l_remaining_bytes;
}
if (! opj_stream_flush(p_stream, p_event_mgr)) {
return (OPJ_SIZE_T) - 1;
}
}
}
OPJ_BOOL opj_stream_flush(opj_stream_private_t * p_stream,
opj_event_mgr_t * p_event_mgr)
{
/* the number of bytes written on the media. */
OPJ_SIZE_T l_current_write_nb_bytes = 0;
p_stream->m_current_data = p_stream->m_stored_data;
while (p_stream->m_bytes_in_buffer) {
/* we should do an actual write on the media */
l_current_write_nb_bytes = p_stream->m_write_fn(p_stream->m_current_data,
p_stream->m_bytes_in_buffer,
p_stream->m_user_data);
if (l_current_write_nb_bytes == (OPJ_SIZE_T) - 1) {
p_stream->m_status |= OPJ_STREAM_STATUS_ERROR;
opj_event_msg(p_event_mgr, EVT_INFO, "Error on writing stream!\n");
return OPJ_FALSE;
}
p_stream->m_current_data += l_current_write_nb_bytes;
p_stream->m_bytes_in_buffer -= l_current_write_nb_bytes;
}
p_stream->m_current_data = p_stream->m_stored_data;
return OPJ_TRUE;
}
OPJ_OFF_T opj_stream_read_skip(opj_stream_private_t * p_stream,
OPJ_OFF_T p_size, opj_event_mgr_t * p_event_mgr)
{
OPJ_OFF_T l_skip_nb_bytes = 0;
OPJ_OFF_T l_current_skip_nb_bytes = 0;
assert(p_size >= 0);
if (p_stream->m_bytes_in_buffer >= (OPJ_SIZE_T)p_size) {
p_stream->m_current_data += p_size;
/* it is safe to cast p_size to OPJ_SIZE_T since it is <= m_bytes_in_buffer
which is of type OPJ_SIZE_T */
p_stream->m_bytes_in_buffer -= (OPJ_SIZE_T)p_size;
l_skip_nb_bytes += p_size;
p_stream->m_byte_offset += l_skip_nb_bytes;
return l_skip_nb_bytes;
}
/* we are now in the case when the remaining data if not sufficient */
if (p_stream->m_status & OPJ_STREAM_STATUS_END) {
l_skip_nb_bytes += (OPJ_OFF_T)p_stream->m_bytes_in_buffer;
p_stream->m_current_data += p_stream->m_bytes_in_buffer;
p_stream->m_bytes_in_buffer = 0;
p_stream->m_byte_offset += l_skip_nb_bytes;
return l_skip_nb_bytes ? l_skip_nb_bytes : (OPJ_OFF_T) - 1;
}
/* the flag is not set, we copy data and then do an actual skip on the stream */
if (p_stream->m_bytes_in_buffer) {
l_skip_nb_bytes += (OPJ_OFF_T)p_stream->m_bytes_in_buffer;
p_stream->m_current_data = p_stream->m_stored_data;
p_size -= (OPJ_OFF_T)p_stream->m_bytes_in_buffer;
p_stream->m_bytes_in_buffer = 0;
}
while (p_size > 0) {
/* Check if we are going beyond the end of file. Most skip_fn do not */
/* check that, but we must be careful not to advance m_byte_offset */
/* beyond m_user_data_length, otherwise */
/* opj_stream_get_number_byte_left() will assert. */
if ((OPJ_UINT64)(p_stream->m_byte_offset + l_skip_nb_bytes + p_size) >
p_stream->m_user_data_length) {
opj_event_msg(p_event_mgr, EVT_INFO, "Stream reached its end !\n");
p_stream->m_byte_offset += l_skip_nb_bytes;
l_skip_nb_bytes = (OPJ_OFF_T)(p_stream->m_user_data_length -
(OPJ_UINT64)p_stream->m_byte_offset);
opj_stream_read_seek(p_stream, (OPJ_OFF_T)p_stream->m_user_data_length,
p_event_mgr);
p_stream->m_status |= OPJ_STREAM_STATUS_END;
/* end if stream */
return l_skip_nb_bytes ? l_skip_nb_bytes : (OPJ_OFF_T) - 1;
}
/* we should do an actual skip on the media */
l_current_skip_nb_bytes = p_stream->m_skip_fn(p_size, p_stream->m_user_data);
if (l_current_skip_nb_bytes == (OPJ_OFF_T) - 1) {
opj_event_msg(p_event_mgr, EVT_INFO, "Stream reached its end !\n");
p_stream->m_status |= OPJ_STREAM_STATUS_END;
p_stream->m_byte_offset += l_skip_nb_bytes;
/* end if stream */
return l_skip_nb_bytes ? l_skip_nb_bytes : (OPJ_OFF_T) - 1;
}
p_size -= l_current_skip_nb_bytes;
l_skip_nb_bytes += l_current_skip_nb_bytes;
}
p_stream->m_byte_offset += l_skip_nb_bytes;
return l_skip_nb_bytes;
}
OPJ_OFF_T opj_stream_write_skip(opj_stream_private_t * p_stream,
OPJ_OFF_T p_size, opj_event_mgr_t * p_event_mgr)
{
OPJ_BOOL l_is_written = 0;
OPJ_OFF_T l_current_skip_nb_bytes = 0;
OPJ_OFF_T l_skip_nb_bytes = 0;
if (p_stream->m_status & OPJ_STREAM_STATUS_ERROR) {
return (OPJ_OFF_T) - 1;
}
/* we should flush data */
l_is_written = opj_stream_flush(p_stream, p_event_mgr);
if (! l_is_written) {
p_stream->m_status |= OPJ_STREAM_STATUS_ERROR;
p_stream->m_bytes_in_buffer = 0;
return (OPJ_OFF_T) - 1;
}
/* then skip */
while (p_size > 0) {
/* we should do an actual skip on the media */
l_current_skip_nb_bytes = p_stream->m_skip_fn(p_size, p_stream->m_user_data);
if (l_current_skip_nb_bytes == (OPJ_OFF_T) - 1) {
opj_event_msg(p_event_mgr, EVT_INFO, "Stream error!\n");
p_stream->m_status |= OPJ_STREAM_STATUS_ERROR;
p_stream->m_byte_offset += l_skip_nb_bytes;
/* end if stream */
return l_skip_nb_bytes ? l_skip_nb_bytes : (OPJ_OFF_T) - 1;
}
p_size -= l_current_skip_nb_bytes;
l_skip_nb_bytes += l_current_skip_nb_bytes;
}
p_stream->m_byte_offset += l_skip_nb_bytes;
return l_skip_nb_bytes;
}
OPJ_OFF_T opj_stream_tell(const opj_stream_private_t * p_stream)
{
return p_stream->m_byte_offset;
}
OPJ_OFF_T opj_stream_get_number_byte_left(const opj_stream_private_t * p_stream)
{
assert(p_stream->m_byte_offset >= 0);
assert(p_stream->m_user_data_length >= (OPJ_UINT64)p_stream->m_byte_offset);
return p_stream->m_user_data_length ?
(OPJ_OFF_T)(p_stream->m_user_data_length) - p_stream->m_byte_offset :
0;
}
OPJ_OFF_T opj_stream_skip(opj_stream_private_t * p_stream, OPJ_OFF_T p_size,
opj_event_mgr_t * p_event_mgr)
{
assert(p_size >= 0);
return p_stream->m_opj_skip(p_stream, p_size, p_event_mgr);
}
OPJ_BOOL opj_stream_read_seek(opj_stream_private_t * p_stream, OPJ_OFF_T p_size,
opj_event_mgr_t * p_event_mgr)
{
OPJ_ARG_NOT_USED(p_event_mgr);
p_stream->m_current_data = p_stream->m_stored_data;
p_stream->m_bytes_in_buffer = 0;
if (!(p_stream->m_seek_fn(p_size, p_stream->m_user_data))) {
p_stream->m_status |= OPJ_STREAM_STATUS_END;
return OPJ_FALSE;
} else {
/* reset stream status */
p_stream->m_status &= (~OPJ_STREAM_STATUS_END);
p_stream->m_byte_offset = p_size;
}
return OPJ_TRUE;
}
OPJ_BOOL opj_stream_write_seek(opj_stream_private_t * p_stream,
OPJ_OFF_T p_size, opj_event_mgr_t * p_event_mgr)
{
if (! opj_stream_flush(p_stream, p_event_mgr)) {
p_stream->m_status |= OPJ_STREAM_STATUS_ERROR;
return OPJ_FALSE;
}
p_stream->m_current_data = p_stream->m_stored_data;
p_stream->m_bytes_in_buffer = 0;
if (! p_stream->m_seek_fn(p_size, p_stream->m_user_data)) {
p_stream->m_status |= OPJ_STREAM_STATUS_ERROR;
return OPJ_FALSE;
} else {
p_stream->m_byte_offset = p_size;
}
return OPJ_TRUE;
}
OPJ_BOOL opj_stream_seek(opj_stream_private_t * p_stream, OPJ_OFF_T p_size,
struct opj_event_mgr * p_event_mgr)
{
assert(p_size >= 0);
return p_stream->m_opj_seek(p_stream, p_size, p_event_mgr);
}
OPJ_BOOL opj_stream_has_seek(const opj_stream_private_t * p_stream)
{
return p_stream->m_seek_fn != opj_stream_default_seek;
}
OPJ_SIZE_T opj_stream_default_read(void * p_buffer, OPJ_SIZE_T p_nb_bytes,
void * p_user_data)
{
OPJ_ARG_NOT_USED(p_buffer);
OPJ_ARG_NOT_USED(p_nb_bytes);
OPJ_ARG_NOT_USED(p_user_data);
return (OPJ_SIZE_T) - 1;
}
OPJ_SIZE_T opj_stream_default_write(void * p_buffer, OPJ_SIZE_T p_nb_bytes,
void * p_user_data)
{
OPJ_ARG_NOT_USED(p_buffer);
OPJ_ARG_NOT_USED(p_nb_bytes);
OPJ_ARG_NOT_USED(p_user_data);
return (OPJ_SIZE_T) - 1;
}
OPJ_OFF_T opj_stream_default_skip(OPJ_OFF_T p_nb_bytes, void * p_user_data)
{
OPJ_ARG_NOT_USED(p_nb_bytes);
OPJ_ARG_NOT_USED(p_user_data);
return (OPJ_OFF_T) - 1;
}
OPJ_BOOL opj_stream_default_seek(OPJ_OFF_T p_nb_bytes, void * p_user_data)
{
OPJ_ARG_NOT_USED(p_nb_bytes);
OPJ_ARG_NOT_USED(p_user_data);
return OPJ_FALSE;
}