diff options
Diffstat (limited to 'extern/libopenjpeg/cio.c')
| -rw-r--r-- | extern/libopenjpeg/cio.c | 704 |
1 files changed, 129 insertions, 575 deletions
diff --git a/extern/libopenjpeg/cio.c b/extern/libopenjpeg/cio.c index 1fc2393743c..97cccea6dee 100644 --- a/extern/libopenjpeg/cio.c +++ b/extern/libopenjpeg/cio.c @@ -1,18 +1,10 @@ /* - * 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) 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) 2003-2007, Francois-Olivier Devaux - * Copyright (c) 2003-2014, Antonin Descampe + * Copyright (c) 2003-2007, Francois-Olivier Devaux and 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 @@ -38,608 +30,170 @@ */ #include "opj_includes.h" +#include <assert.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_malloc(sizeof(opj_stream_private_t)); - if (! l_stream) { - return 00; - } - - memset(l_stream,0,sizeof(opj_stream_private_t)); - 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_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; } - 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; - } + 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 { - /* 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; - } + else { + opj_free(cio); + return NULL; } -} - -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; + /* Initialize byte IO */ + cio->start = cio->buffer; + cio->end = cio->buffer + cio->length; + cio->bp = cio->buffer; - 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; + return cio; } -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; +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); } - p_size -= l_current_skip_nb_bytes; - l_skip_nb_bytes += l_current_skip_nb_bytes; + /* destroy the cio */ + opj_free(cio); } - - 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; +/* + * Get position in byte stream. + */ +int OPJ_CALLCONV cio_tell(opj_cio_t *cio) { + return cio->bp - cio->start; } -OPJ_OFF_T opj_stream_tell (const opj_stream_private_t * p_stream) -{ - return p_stream->m_byte_offset; +/* + * Set position in byte stream. + * + * pos : position, in number of bytes, from the beginning of the stream + */ +void OPJ_CALLCONV cio_seek(opj_cio_t *cio, int pos) { + assert((cio->start + pos) <= cio->end); + cio->bp = cio->start + pos; } -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; +/* + * Number of bytes left before the end of the stream. + */ +int cio_numbytesleft(opj_cio_t *cio) { + assert((cio->end - cio->bp) >= 0); + return cio->end - cio->bp; } -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); +/* + * Get pointer to the current position in the stream. + */ +unsigned char *cio_getbp(opj_cio_t *cio) { + return cio->bp; } -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; +/* + * Write a byte. + */ +opj_bool cio_byteout(opj_cio_t *cio, unsigned char v) { + if (cio->bp >= cio->end) { + opj_event_msg(cio->cinfo, EVT_ERROR, "write error\n"); return OPJ_FALSE; } - else { - /* reset stream status */ - p_stream->m_status &= (~opj_stream_e_end); - p_stream->m_byte_offset = p_size; - - } - + *cio->bp++ = v; 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; +/* + * Read a byte. + */ +unsigned char cio_bytein(opj_cio_t *cio) { + assert(cio->bp >= cio->start); + 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 OPJ_TRUE; + return *cio->bp++; } -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); +/* + * Write some bytes. + * + * v : value to write + * n : number of bytes to write + */ +unsigned int cio_write(opj_cio_t *cio, unsigned int64 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; } -OPJ_BOOL opj_stream_has_seek (const opj_stream_private_t * p_stream) -{ - return p_stream->m_seek_fn != opj_stream_default_seek; +/* + * Read some bytes. + * + * n : number of bytes to read + * + * 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 += (unsigned int)cio_bytein(cio) << (i << 3); + } + return v; } -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; +/* + * Skip some bytes. + * + * n : number of bytes to skip + */ +void cio_skip(opj_cio_t *cio, int n) { + assert((cio->bp + n) >= cio->bp); + if (((cio->bp + n) < cio->start) || ((cio->bp + n) > cio->end)) { + assert(0); + } + cio->bp += n; } -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; -} |