diff options
Diffstat (limited to 'third_party/libopenjpeg20/cio.c')
| -rw-r--r-- | third_party/libopenjpeg20/cio.c | 644 |
1 files changed, 644 insertions, 0 deletions
diff --git a/third_party/libopenjpeg20/cio.c b/third_party/libopenjpeg20/cio.c new file mode 100644 index 0000000000..c455bf7711 --- /dev/null +++ b/third_party/libopenjpeg20/cio.c @@ -0,0 +1,644 @@ +/* + * 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) + 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+4-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_e_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_e_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_e_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_e_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_e_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; + } + + while(1){ + /* 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_e_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_e_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_e_error) { + return (OPJ_SIZE_T)-1; + } + + while(1) { + 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_e_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_e_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) { + /* 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_e_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_e_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_e_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_e_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_e_end; + return OPJ_FALSE; + } + else { + /* reset stream status */ + p_stream->m_status &= (~opj_stream_e_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_e_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_e_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; +} |