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Diffstat (limited to 'src/lib/openjp2/cio.h')
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1 files changed, 409 insertions, 0 deletions
diff --git a/src/lib/openjp2/cio.h b/src/lib/openjp2/cio.h new file mode 100644 index 00000000..f5c4a862 --- /dev/null +++ b/src/lib/openjp2/cio.h @@ -0,0 +1,409 @@ +/* + * 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 and Antonin Descampe + * Copyright (c) 2005, Herve Drolon, FreeImage Team + * 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. + */ + +#ifndef __CIO_H +#define __CIO_H +/** +@file cio.h +@brief Implementation of a byte input-output process (CIO) + +The functions in CIO.C have for goal to realize a byte input / output process. +*/ + +/** @defgroup CIO CIO - byte input-output stream */ +/*@{*/ + +#include "opj_config.h" + +/** @name Exported functions (see also openjpeg.h) */ +/*@{*/ +/* ----------------------------------------------------------------------- */ +/** +Number of bytes left before the end of the stream +@param cio CIO handle +@return Returns the number of bytes before the end of the stream +*/ +OPJ_SIZE_T cio_numbytesleft(opj_cio_t *cio); +/** +Get pointer to the current position in the stream +@param cio CIO handle +@return Returns a pointer to the current position +*/ +unsigned char *cio_getbp(opj_cio_t *cio); +/** +*/ +opj_bool cio_byteout(opj_cio_t *cio, unsigned char v); +/** +*/ +unsigned char cio_bytein(opj_cio_t *cio); +/** +Write some bytes +@param cio CIO handle +@param v Value to write +@param n Number of bytes to write +@return Returns the number of bytes written or 0 if an error occured +*/ +unsigned int cio_write(opj_cio_t *cio, unsigned long long int v, int n); +/** +Read some bytes +@param cio CIO handle +@param n Number of bytes to read +@return Returns the value of the n bytes read +*/ +unsigned int cio_read(opj_cio_t *cio, int n); +/** +Skip some bytes +@param cio CIO handle +@param n Number of bytes to skip +*/ +void cio_skip(opj_cio_t *cio, int n); +/* ----------------------------------------------------------------------- */ +/*@}*/ + +/*@}*/ + + + +/* ----------------------------------------------------------------------- */ + +#if defined(OPJ_BIG_ENDIAN) + #define opj_write_bytes opj_write_bytes_BE + #define opj_read_bytes opj_read_bytes_BE + #define opj_write_double opj_write_double_BE + #define opj_read_double opj_read_double_BE + #define opj_write_float opj_write_float_BE + #define opj_read_float opj_read_float_BE +#else + #define opj_write_bytes opj_write_bytes_LE + #define opj_read_bytes opj_read_bytes_LE + #define opj_write_double opj_write_double_LE + #define opj_read_double opj_read_double_LE + #define opj_write_float opj_write_float_LE + #define opj_read_float opj_read_float_LE +#endif + + + +typedef enum +{ + opj_signed_sentinel = -1, /* do not use in code */ + opj_stream_e_output = 0x1, + opj_stream_e_input = 0x2, + opj_stream_e_end = 0x4, + opj_stream_e_error = 0x8 +} +opj_stream_flag ; + +/** +Byte input-output stream. +*/ +typedef struct opj_stream_private +{ + /** + * User data, be it files, ... The actual data depends on the type of the stream. + */ + void * m_user_data; + + /** + * User data length + */ + OPJ_UINT64 m_user_data_length; + + /** + * Pointer to actual read function (NULL at the initialization of the cio. + */ + opj_stream_read_fn m_read_fn; + + /** + * Pointer to actual write function (NULL at the initialization of the cio. + */ + opj_stream_write_fn m_write_fn; + + /** + * Pointer to actual skip function (NULL at the initialization of the cio. + * There is no seek function to prevent from back and forth slow procedures. + */ + opj_stream_skip_fn m_skip_fn; + + /** + * Pointer to actual seek function (if available). + */ + opj_stream_seek_fn m_seek_fn; + + + + + /** + * Actual data stored into the stream if readed from. Data is read by chunk of fixed size. + * you should never access this data directly. + */ + OPJ_BYTE * m_stored_data; + + /** + * Pointer to the current read data. + */ + OPJ_BYTE * m_current_data; + + OPJ_OFF_T (* m_opj_skip)(struct opj_stream_private * ,OPJ_OFF_T , struct opj_event_mgr *); + + opj_bool (* m_opj_seek) (struct opj_stream_private * , OPJ_OFF_T , struct opj_event_mgr *); + + /** + * number of bytes containing in the buffer. + */ + OPJ_SIZE_T m_bytes_in_buffer; + + /** + * The number of bytes read/written from the beginning of the stream + */ + OPJ_OFF_T m_byte_offset; + + /** + * The size of the buffer. + */ + OPJ_SIZE_T m_buffer_size; + + /** + * Flags to tell the status of the stream. + */ + opj_stream_flag m_status; + +} +opj_stream_private_t; + + +/** + * Write some bytes to the given data buffer, this function is used in Big Endian cpus. + * @param p_buffer pointer the data buffer to write data to. + * @param p_value the value to write + * @param p_nb_bytes the number of bytes to write +*/ +void opj_write_bytes_BE (OPJ_BYTE * p_buffer, OPJ_UINT32 p_value, OPJ_UINT32 p_nb_bytes); + +/** + * Reads some bytes from the given data buffer, this function is used in Big Endian cpus. + * @param p_buffer pointer the data buffer to read data from. + * @param p_value pointer to the value that will store the data. + * @param p_nb_bytes the nb bytes to read. + * @return the number of bytes read or -1 if an error occured. + */ +void opj_read_bytes_BE(const OPJ_BYTE * p_buffer, OPJ_UINT32 * p_value, OPJ_UINT32 p_nb_bytes); + +/** + * Write some bytes to the given data buffer, this function is used in Little Endian cpus. + * @param p_buffer pointer the data buffer to write data to. + * @param p_value the value to write + * @param p_nb_bytes the number of bytes to write + * @return the number of bytes written or -1 if an error occured +*/ +void opj_write_bytes_LE (OPJ_BYTE * p_buffer, OPJ_UINT32 p_value, OPJ_UINT32 p_nb_bytes); + +/** + * Reads some bytes from the given data buffer, this function is used in Little Endian cpus. + * @param p_buffer pointer the data buffer to read data from. + * @param p_value pointer to the value that will store the data. + * @param p_nb_bytes the nb bytes to read. + * @return the number of bytes read or -1 if an error occured. + */ +void opj_read_bytes_LE(const OPJ_BYTE * p_buffer, OPJ_UINT32 * p_value, OPJ_UINT32 p_nb_bytes); + + +/** + * Write some bytes to the given data buffer, this function is used in Little Endian cpus. + * @param p_buffer pointer the data buffer to write data to. + * @param p_value the value to write + */ +void opj_write_double_LE(OPJ_BYTE * p_buffer, OPJ_FLOAT64 p_value); + +/*** + * Write some bytes to the given data buffer, this function is used in Big Endian cpus. + * @param p_buffer pointer the data buffer to write data to. + * @param p_value the value to write + */ +void opj_write_double_BE(OPJ_BYTE * p_buffer, OPJ_FLOAT64 p_value); + +/** + * Reads some bytes from the given data buffer, this function is used in Little Endian cpus. + * @param p_buffer pointer the data buffer to read data from. + * @param p_value pointer to the value that will store the data. + */ +void opj_read_double_LE(const OPJ_BYTE * p_buffer, OPJ_FLOAT64 * p_value); + +/** + * Reads some bytes from the given data buffer, this function is used in Big Endian cpus. + * @param p_buffer pointer the data buffer to read data from. + * @param p_value pointer to the value that will store the data. + */ +void opj_read_double_BE(const OPJ_BYTE * p_buffer, OPJ_FLOAT64 * p_value); + +/** + * Reads some bytes from the given data buffer, this function is used in Little Endian cpus. + * @param p_buffer pointer the data buffer to read data from. + * @param p_value pointer to the value that will store the data. + */ +void opj_read_float_LE(const OPJ_BYTE * p_buffer, OPJ_FLOAT32 * p_value); + +/** + * Reads some bytes from the given data buffer, this function is used in Big Endian cpus. + * @param p_buffer pointer the data buffer to read data from. + * @param p_value pointer to the value that will store the data. + */ +void opj_read_float_BE(const OPJ_BYTE * p_buffer, OPJ_FLOAT32 * p_value); + +/** + * Write some bytes to the given data buffer, this function is used in Little Endian cpus. + * @param p_buffer pointer the data buffer to write data to. + * @param p_value the value to write + */ +void opj_write_float_LE(OPJ_BYTE * p_buffer, OPJ_FLOAT32 p_value); + +/*** + * Write some bytes to the given data buffer, this function is used in Big Endian cpus. + * @param p_buffer pointer the data buffer to write data to. + * @param p_value the value to write + */ +void opj_write_float_BE(OPJ_BYTE * p_buffer, OPJ_FLOAT32 p_value); + +/** + * Reads some bytes from the stream. + * @param p_stream the stream to read data from. + * @param p_buffer pointer to the data buffer that will receive the data. + * @param p_size number of bytes to read. + * @param p_event_mgr the user event manager to be notified of special events. + * @return the number of bytes read, or -1 if an error occured or if the stream is at the end. + */ +OPJ_SIZE_T opj_stream_read_data (opj_stream_private_t * p_stream,OPJ_BYTE * p_buffer, OPJ_SIZE_T p_size, struct opj_event_mgr * p_event_mgr); + +/** + * Writes some bytes to the stream. + * @param p_stream the stream to write data to. + * @param p_buffer pointer to the data buffer holds the data to be writtent. + * @param p_size number of bytes to write. + * @param p_event_mgr the user event manager to be notified of special events. + * @return the number of bytes writtent, or -1 if an error occured. + */ +OPJ_SIZE_T opj_stream_write_data (opj_stream_private_t * p_stream,const OPJ_BYTE * p_buffer, OPJ_SIZE_T p_size, struct opj_event_mgr * p_event_mgr); + +/** + * Writes the content of the stream buffer to the stream. + * @param p_stream the stream to write data to. + * @param p_event_mgr the user event manager to be notified of special events. + * @return true if the data could be flushed, false else. + */ +opj_bool opj_stream_flush (opj_stream_private_t * p_stream, struct opj_event_mgr * p_event_mgr); + +/** + * Skips a number of bytes from the stream. + * @param p_stream the stream to skip data from. + * @param p_size the number of bytes to skip. + * @param p_event_mgr the user event manager to be notified of special events. + * @return the number of bytes skipped, or -1 if an error occured. + */ +OPJ_OFF_T opj_stream_skip (opj_stream_private_t * p_stream,OPJ_OFF_T p_size, struct opj_event_mgr * p_event_mgr); + +/** + * Tells the byte offset on the stream (similar to ftell). + * + * @param p_stream the stream to get the information from. + * + * @return the current position o fthe stream. + */ +OPJ_OFF_T opj_stream_tell (const opj_stream_private_t * p_stream); + + +/** + * Get the number of bytes left before the end of the stream (similar to cio_numbytesleft). + * + * @param p_stream the stream to get the information from. + * + * @return Number of bytes left before the end of the stream. + */ +OPJ_OFF_T opj_stream_get_number_byte_left (const opj_stream_private_t * p_stream); + +/** + * Skips a number of bytes from the stream. + * @param p_stream the stream to skip data from. + * @param p_size the number of bytes to skip. + * @param p_event_mgr the user event manager to be notified of special events. + * @return the number of bytes skipped, or -1 if an error occured. + */ +OPJ_OFF_T opj_stream_write_skip (opj_stream_private_t * p_stream, OPJ_OFF_T p_size, struct opj_event_mgr * p_event_mgr); + +/** + * Skips a number of bytes from the stream. + * @param p_stream the stream to skip data from. + * @param p_size the number of bytes to skip. + * @param p_event_mgr the user event manager to be notified of special events. + * @return the number of bytes skipped, or -1 if an error occured. + */ +OPJ_OFF_T opj_stream_read_skip (opj_stream_private_t * p_stream, OPJ_OFF_T p_size, struct opj_event_mgr * p_event_mgr); + +/** + * Skips a number of bytes from the stream. + * @param p_stream the stream to skip data from. + * @param p_size the number of bytes to skip. + * @param p_event_mgr the user event manager to be notified of special events. + * @return OPJ_TRUE if success, or OPJ_FALSE if an error occured. + */ +opj_bool opj_stream_read_seek (opj_stream_private_t * p_stream, OPJ_OFF_T p_size, struct opj_event_mgr * p_event_mgr); + +/** + * Skips a number of bytes from the stream. + * @param p_stream the stream to skip data from. + * @param p_size the number of bytes to skip. + * @param p_event_mgr the user event manager to be notified of special events. + * @return the number of bytes skipped, or -1 if an error occured. + */ +opj_bool opj_stream_write_seek (opj_stream_private_t * p_stream, OPJ_OFF_T p_size, struct opj_event_mgr * p_event_mgr); + +/** + * Seeks a number of bytes from the stream. + * @param p_stream the stream to skip data from. + * @param p_size the number of bytes to skip. + * @param p_event_mgr the user event manager to be notified of special events. + * @return true if the stream is seekable. + */ +opj_bool opj_stream_seek (opj_stream_private_t * p_stream, OPJ_OFF_T p_size, struct opj_event_mgr * p_event_mgr); + +/** + * Tells if the given stream is seekable. + */ +opj_bool opj_stream_has_seek (const opj_stream_private_t * p_stream); + +OPJ_SIZE_T opj_stream_default_read (void * p_buffer, OPJ_SIZE_T p_nb_bytes, void * p_user_data); +OPJ_SIZE_T opj_stream_default_write (void * p_buffer, OPJ_SIZE_T p_nb_bytes, void * p_user_data); +OPJ_OFF_T opj_stream_default_skip (OPJ_OFF_T p_nb_bytes, void * p_user_data); +opj_bool opj_stream_default_seek (OPJ_OFF_T p_nb_bytes, void * p_user_data); + + + +#endif /* __CIO_H */ + |