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0c84b91dde
- https://github.com/uclouvain/openjpeg/releases/tag/v2.3.1 - src/lib/openjp2 - readme files
684 lines
24 KiB
C
684 lines
24 KiB
C
/*
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* The copyright in this software is being made available under the 2-clauses
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* BSD License, included below. This software may be subject to other third
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* party and contributor rights, including patent rights, and no such rights
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* are granted under this license.
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*
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* Copyright (c) 2002-2014, Universite catholique de Louvain (UCL), Belgium
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* Copyright (c) 2002-2014, Professor Benoit Macq
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* Copyright (c) 2001-2003, David Janssens
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* Copyright (c) 2002-2003, Yannick Verschueren
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* Copyright (c) 2003-2007, Francois-Olivier Devaux
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* Copyright (c) 2003-2014, Antonin Descampe
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* Copyright (c) 2005, Herve Drolon, FreeImage Team
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* Copyright (c) 2008, 2011-2012, Centre National d'Etudes Spatiales (CNES), FR
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* Copyright (c) 2012, CS Systemes d'Information, France
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS `AS IS'
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* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
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* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*/
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#include "opj_includes.h"
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/* ----------------------------------------------------------------------- */
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/* ----------------------------------------------------------------------- */
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void opj_write_bytes_BE(OPJ_BYTE * p_buffer, OPJ_UINT32 p_value,
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OPJ_UINT32 p_nb_bytes)
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{
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const OPJ_BYTE * l_data_ptr = ((const OPJ_BYTE *) &p_value) + sizeof(
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OPJ_UINT32) - p_nb_bytes;
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assert(p_nb_bytes > 0 && p_nb_bytes <= sizeof(OPJ_UINT32));
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memcpy(p_buffer, l_data_ptr, p_nb_bytes);
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}
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void opj_write_bytes_LE(OPJ_BYTE * p_buffer, OPJ_UINT32 p_value,
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OPJ_UINT32 p_nb_bytes)
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{
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const OPJ_BYTE * l_data_ptr = ((const OPJ_BYTE *) &p_value) + p_nb_bytes - 1;
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OPJ_UINT32 i;
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assert(p_nb_bytes > 0 && p_nb_bytes <= sizeof(OPJ_UINT32));
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for (i = 0; i < p_nb_bytes; ++i) {
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*(p_buffer++) = *(l_data_ptr--);
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}
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}
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void opj_read_bytes_BE(const OPJ_BYTE * p_buffer, OPJ_UINT32 * p_value,
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OPJ_UINT32 p_nb_bytes)
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{
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OPJ_BYTE * l_data_ptr = ((OPJ_BYTE *) p_value);
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assert(p_nb_bytes > 0 && p_nb_bytes <= sizeof(OPJ_UINT32));
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*p_value = 0;
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memcpy(l_data_ptr + sizeof(OPJ_UINT32) - p_nb_bytes, p_buffer, p_nb_bytes);
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}
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void opj_read_bytes_LE(const OPJ_BYTE * p_buffer, OPJ_UINT32 * p_value,
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OPJ_UINT32 p_nb_bytes)
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{
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OPJ_BYTE * l_data_ptr = ((OPJ_BYTE *) p_value) + p_nb_bytes - 1;
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OPJ_UINT32 i;
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assert(p_nb_bytes > 0 && p_nb_bytes <= sizeof(OPJ_UINT32));
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*p_value = 0;
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for (i = 0; i < p_nb_bytes; ++i) {
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*(l_data_ptr--) = *(p_buffer++);
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}
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}
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void opj_write_double_BE(OPJ_BYTE * p_buffer, OPJ_FLOAT64 p_value)
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{
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const OPJ_BYTE * l_data_ptr = ((const OPJ_BYTE *) &p_value);
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memcpy(p_buffer, l_data_ptr, sizeof(OPJ_FLOAT64));
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}
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void opj_write_double_LE(OPJ_BYTE * p_buffer, OPJ_FLOAT64 p_value)
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{
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const OPJ_BYTE * l_data_ptr = ((const OPJ_BYTE *) &p_value) + sizeof(
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OPJ_FLOAT64) - 1;
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OPJ_UINT32 i;
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for (i = 0; i < sizeof(OPJ_FLOAT64); ++i) {
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*(p_buffer++) = *(l_data_ptr--);
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}
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}
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void opj_read_double_BE(const OPJ_BYTE * p_buffer, OPJ_FLOAT64 * p_value)
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{
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OPJ_BYTE * l_data_ptr = ((OPJ_BYTE *) p_value);
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memcpy(l_data_ptr, p_buffer, sizeof(OPJ_FLOAT64));
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}
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void opj_read_double_LE(const OPJ_BYTE * p_buffer, OPJ_FLOAT64 * p_value)
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{
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OPJ_BYTE * l_data_ptr = ((OPJ_BYTE *) p_value) + sizeof(OPJ_FLOAT64) - 1;
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OPJ_UINT32 i;
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for (i = 0; i < sizeof(OPJ_FLOAT64); ++i) {
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*(l_data_ptr--) = *(p_buffer++);
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}
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}
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void opj_write_float_BE(OPJ_BYTE * p_buffer, OPJ_FLOAT32 p_value)
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{
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const OPJ_BYTE * l_data_ptr = ((const OPJ_BYTE *) &p_value);
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memcpy(p_buffer, l_data_ptr, sizeof(OPJ_FLOAT32));
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}
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void opj_write_float_LE(OPJ_BYTE * p_buffer, OPJ_FLOAT32 p_value)
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{
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const OPJ_BYTE * l_data_ptr = ((const OPJ_BYTE *) &p_value) + sizeof(
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OPJ_FLOAT32) - 1;
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OPJ_UINT32 i;
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for (i = 0; i < sizeof(OPJ_FLOAT32); ++i) {
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*(p_buffer++) = *(l_data_ptr--);
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}
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}
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void opj_read_float_BE(const OPJ_BYTE * p_buffer, OPJ_FLOAT32 * p_value)
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{
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OPJ_BYTE * l_data_ptr = ((OPJ_BYTE *) p_value);
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memcpy(l_data_ptr, p_buffer, sizeof(OPJ_FLOAT32));
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}
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void opj_read_float_LE(const OPJ_BYTE * p_buffer, OPJ_FLOAT32 * p_value)
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{
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OPJ_BYTE * l_data_ptr = ((OPJ_BYTE *) p_value) + sizeof(OPJ_FLOAT32) - 1;
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OPJ_UINT32 i;
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for (i = 0; i < sizeof(OPJ_FLOAT32); ++i) {
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*(l_data_ptr--) = *(p_buffer++);
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}
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}
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opj_stream_t* OPJ_CALLCONV opj_stream_create(OPJ_SIZE_T p_buffer_size,
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OPJ_BOOL l_is_input)
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{
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opj_stream_private_t * l_stream = 00;
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l_stream = (opj_stream_private_t*) opj_calloc(1, sizeof(opj_stream_private_t));
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if (! l_stream) {
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return 00;
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}
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l_stream->m_buffer_size = p_buffer_size;
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l_stream->m_stored_data = (OPJ_BYTE *) opj_malloc(p_buffer_size);
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if (! l_stream->m_stored_data) {
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opj_free(l_stream);
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return 00;
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}
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l_stream->m_current_data = l_stream->m_stored_data;
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if (l_is_input) {
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l_stream->m_status |= OPJ_STREAM_STATUS_INPUT;
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l_stream->m_opj_skip = opj_stream_read_skip;
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l_stream->m_opj_seek = opj_stream_read_seek;
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} else {
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l_stream->m_status |= OPJ_STREAM_STATUS_OUTPUT;
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l_stream->m_opj_skip = opj_stream_write_skip;
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l_stream->m_opj_seek = opj_stream_write_seek;
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}
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l_stream->m_read_fn = opj_stream_default_read;
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l_stream->m_write_fn = opj_stream_default_write;
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l_stream->m_skip_fn = opj_stream_default_skip;
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l_stream->m_seek_fn = opj_stream_default_seek;
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return (opj_stream_t *) l_stream;
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}
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opj_stream_t* OPJ_CALLCONV opj_stream_default_create(OPJ_BOOL l_is_input)
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{
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return opj_stream_create(OPJ_J2K_STREAM_CHUNK_SIZE, l_is_input);
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}
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void OPJ_CALLCONV opj_stream_destroy(opj_stream_t* p_stream)
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{
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opj_stream_private_t* l_stream = (opj_stream_private_t*) p_stream;
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if (l_stream) {
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if (l_stream->m_free_user_data_fn) {
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l_stream->m_free_user_data_fn(l_stream->m_user_data);
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}
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opj_free(l_stream->m_stored_data);
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l_stream->m_stored_data = 00;
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opj_free(l_stream);
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}
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}
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void OPJ_CALLCONV opj_stream_set_read_function(opj_stream_t* p_stream,
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opj_stream_read_fn p_function)
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{
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opj_stream_private_t* l_stream = (opj_stream_private_t*) p_stream;
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if ((!l_stream) || (!(l_stream->m_status & OPJ_STREAM_STATUS_INPUT))) {
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return;
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}
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l_stream->m_read_fn = p_function;
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}
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void OPJ_CALLCONV opj_stream_set_seek_function(opj_stream_t* p_stream,
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opj_stream_seek_fn p_function)
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{
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opj_stream_private_t* l_stream = (opj_stream_private_t*) p_stream;
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if (!l_stream) {
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return;
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}
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l_stream->m_seek_fn = p_function;
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}
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void OPJ_CALLCONV opj_stream_set_write_function(opj_stream_t* p_stream,
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opj_stream_write_fn p_function)
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{
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opj_stream_private_t* l_stream = (opj_stream_private_t*) p_stream;
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if ((!l_stream) || (!(l_stream->m_status & OPJ_STREAM_STATUS_OUTPUT))) {
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return;
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}
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l_stream->m_write_fn = p_function;
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}
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void OPJ_CALLCONV opj_stream_set_skip_function(opj_stream_t* p_stream,
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opj_stream_skip_fn p_function)
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{
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opj_stream_private_t* l_stream = (opj_stream_private_t*) p_stream;
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if (! l_stream) {
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return;
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}
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l_stream->m_skip_fn = p_function;
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}
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void OPJ_CALLCONV opj_stream_set_user_data(opj_stream_t* p_stream,
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void * p_data, opj_stream_free_user_data_fn p_function)
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{
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opj_stream_private_t* l_stream = (opj_stream_private_t*) p_stream;
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if (!l_stream) {
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return;
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}
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l_stream->m_user_data = p_data;
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l_stream->m_free_user_data_fn = p_function;
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}
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void OPJ_CALLCONV opj_stream_set_user_data_length(opj_stream_t* p_stream,
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OPJ_UINT64 data_length)
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{
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opj_stream_private_t* l_stream = (opj_stream_private_t*) p_stream;
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if (!l_stream) {
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return;
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}
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l_stream->m_user_data_length = data_length;
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}
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OPJ_SIZE_T opj_stream_read_data(opj_stream_private_t * p_stream,
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OPJ_BYTE * p_buffer, OPJ_SIZE_T p_size, opj_event_mgr_t * p_event_mgr)
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{
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OPJ_SIZE_T l_read_nb_bytes = 0;
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if (p_stream->m_bytes_in_buffer >= p_size) {
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memcpy(p_buffer, p_stream->m_current_data, p_size);
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p_stream->m_current_data += p_size;
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p_stream->m_bytes_in_buffer -= p_size;
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l_read_nb_bytes += p_size;
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p_stream->m_byte_offset += (OPJ_OFF_T)p_size;
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return l_read_nb_bytes;
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}
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/* we are now in the case when the remaining data if not sufficient */
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if (p_stream->m_status & OPJ_STREAM_STATUS_END) {
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l_read_nb_bytes += p_stream->m_bytes_in_buffer;
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memcpy(p_buffer, p_stream->m_current_data, p_stream->m_bytes_in_buffer);
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p_stream->m_current_data += p_stream->m_bytes_in_buffer;
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p_stream->m_byte_offset += (OPJ_OFF_T)p_stream->m_bytes_in_buffer;
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p_stream->m_bytes_in_buffer = 0;
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return l_read_nb_bytes ? l_read_nb_bytes : (OPJ_SIZE_T) - 1;
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}
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/* the flag is not set, we copy data and then do an actual read on the stream */
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if (p_stream->m_bytes_in_buffer) {
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l_read_nb_bytes += p_stream->m_bytes_in_buffer;
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memcpy(p_buffer, p_stream->m_current_data, p_stream->m_bytes_in_buffer);
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p_stream->m_current_data = p_stream->m_stored_data;
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p_buffer += p_stream->m_bytes_in_buffer;
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p_size -= p_stream->m_bytes_in_buffer;
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p_stream->m_byte_offset += (OPJ_OFF_T)p_stream->m_bytes_in_buffer;
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p_stream->m_bytes_in_buffer = 0;
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} else {
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/* case where we are already at the end of the buffer
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so reset the m_current_data to point to the start of the
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stored buffer to get ready to read from disk*/
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p_stream->m_current_data = p_stream->m_stored_data;
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}
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for (;;) {
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/* we should read less than a chunk -> read a chunk */
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if (p_size < p_stream->m_buffer_size) {
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/* we should do an actual read on the media */
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p_stream->m_bytes_in_buffer = p_stream->m_read_fn(p_stream->m_stored_data,
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p_stream->m_buffer_size, p_stream->m_user_data);
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if (p_stream->m_bytes_in_buffer == (OPJ_SIZE_T) - 1) {
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/* end of stream */
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opj_event_msg(p_event_mgr, EVT_INFO, "Stream reached its end !\n");
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p_stream->m_bytes_in_buffer = 0;
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p_stream->m_status |= OPJ_STREAM_STATUS_END;
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/* end of stream */
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return l_read_nb_bytes ? l_read_nb_bytes : (OPJ_SIZE_T) - 1;
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} else if (p_stream->m_bytes_in_buffer < p_size) {
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/* not enough data */
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l_read_nb_bytes += p_stream->m_bytes_in_buffer;
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memcpy(p_buffer, p_stream->m_current_data, p_stream->m_bytes_in_buffer);
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p_stream->m_current_data = p_stream->m_stored_data;
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p_buffer += p_stream->m_bytes_in_buffer;
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p_size -= p_stream->m_bytes_in_buffer;
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p_stream->m_byte_offset += (OPJ_OFF_T)p_stream->m_bytes_in_buffer;
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p_stream->m_bytes_in_buffer = 0;
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} else {
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l_read_nb_bytes += p_size;
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memcpy(p_buffer, p_stream->m_current_data, p_size);
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p_stream->m_current_data += p_size;
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p_stream->m_bytes_in_buffer -= p_size;
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p_stream->m_byte_offset += (OPJ_OFF_T)p_size;
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return l_read_nb_bytes;
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}
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} else {
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/* direct read on the dest buffer */
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p_stream->m_bytes_in_buffer = p_stream->m_read_fn(p_buffer, p_size,
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p_stream->m_user_data);
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if (p_stream->m_bytes_in_buffer == (OPJ_SIZE_T) - 1) {
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/* end of stream */
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opj_event_msg(p_event_mgr, EVT_INFO, "Stream reached its end !\n");
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p_stream->m_bytes_in_buffer = 0;
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p_stream->m_status |= OPJ_STREAM_STATUS_END;
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/* end of stream */
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return l_read_nb_bytes ? l_read_nb_bytes : (OPJ_SIZE_T) - 1;
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} else if (p_stream->m_bytes_in_buffer < p_size) {
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/* not enough data */
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l_read_nb_bytes += p_stream->m_bytes_in_buffer;
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p_stream->m_current_data = p_stream->m_stored_data;
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p_buffer += p_stream->m_bytes_in_buffer;
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p_size -= p_stream->m_bytes_in_buffer;
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p_stream->m_byte_offset += (OPJ_OFF_T)p_stream->m_bytes_in_buffer;
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p_stream->m_bytes_in_buffer = 0;
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} else {
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/* we have read the exact size */
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l_read_nb_bytes += p_stream->m_bytes_in_buffer;
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p_stream->m_byte_offset += (OPJ_OFF_T)p_stream->m_bytes_in_buffer;
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p_stream->m_current_data = p_stream->m_stored_data;
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p_stream->m_bytes_in_buffer = 0;
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return l_read_nb_bytes;
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}
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}
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}
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}
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OPJ_SIZE_T opj_stream_write_data(opj_stream_private_t * p_stream,
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const OPJ_BYTE * p_buffer,
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OPJ_SIZE_T p_size,
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opj_event_mgr_t * p_event_mgr)
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{
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OPJ_SIZE_T l_remaining_bytes = 0;
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OPJ_SIZE_T l_write_nb_bytes = 0;
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if (p_stream->m_status & OPJ_STREAM_STATUS_ERROR) {
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return (OPJ_SIZE_T) - 1;
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}
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for (;;) {
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l_remaining_bytes = p_stream->m_buffer_size - p_stream->m_bytes_in_buffer;
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/* we have more memory than required */
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if (l_remaining_bytes >= p_size) {
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memcpy(p_stream->m_current_data, p_buffer, p_size);
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p_stream->m_current_data += p_size;
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p_stream->m_bytes_in_buffer += p_size;
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l_write_nb_bytes += p_size;
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p_stream->m_byte_offset += (OPJ_OFF_T)p_size;
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return l_write_nb_bytes;
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}
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/* we copy data and then do an actual read on the stream */
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if (l_remaining_bytes) {
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l_write_nb_bytes += l_remaining_bytes;
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memcpy(p_stream->m_current_data, p_buffer, l_remaining_bytes);
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|
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;
|
|
}
|