From 5a422aba704c375a307a902bafe658342e209906 Mon Sep 17 00:00:00 2001 From: scuri Date: Fri, 17 Oct 2008 06:10:15 +0000 Subject: First commit - moving from LuaForge to SourceForge --- src/libexif/olympus/exif-mnote-data-olympus.c | 403 ++++++++++++++++++++++++++ 1 file changed, 403 insertions(+) create mode 100644 src/libexif/olympus/exif-mnote-data-olympus.c (limited to 'src/libexif/olympus/exif-mnote-data-olympus.c') diff --git a/src/libexif/olympus/exif-mnote-data-olympus.c b/src/libexif/olympus/exif-mnote-data-olympus.c new file mode 100644 index 0000000..02794c5 --- /dev/null +++ b/src/libexif/olympus/exif-mnote-data-olympus.c @@ -0,0 +1,403 @@ +/* exif-mnote-data-olympus.c + * + * Copyright © 2002, 2003 Lutz Mueller + * + * This library is free software; you can redistribute it and/or + * modify it under the terms of the GNU Lesser General Public + * License as published by the Free Software Foundation; either + * version 2 of the License, or (at your option) any later version. + * + * This library is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + * Lesser General Public License for more details. + * + * You should have received a copy of the GNU Lesser General Public + * License along with this library; if not, write to the + * Free Software Foundation, Inc., 59 Temple Place - Suite 330, + * Boston, MA 02111-1307, USA. + */ + +#include +#include "exif-mnote-data-olympus.h" + +#include +#include +#include + +#include +#include + +#define DEBUG + +static void +exif_mnote_data_olympus_clear (ExifMnoteDataOlympus *n) +{ + ExifMnoteData *d = (ExifMnoteData *) n; + unsigned int i; + + if (!n) return; + + if (n->entries) { + for (i = 0; i < n->count; i++) + if (n->entries[i].data) { + exif_mem_free (d->mem, n->entries[i].data); + n->entries[i].data = NULL; + } + exif_mem_free (d->mem, n->entries); + n->entries = NULL; + n->count = 0; + } +} + +static void +exif_mnote_data_olympus_free (ExifMnoteData *n) +{ + if (!n) return; + + exif_mnote_data_olympus_clear ((ExifMnoteDataOlympus *) n); +} + +static char * +exif_mnote_data_olympus_get_value (ExifMnoteData *d, unsigned int i, char *val, unsigned int maxlen) +{ + ExifMnoteDataOlympus *n = (ExifMnoteDataOlympus *) d; + + if (!d || !val) return NULL; + if (i > n->count -1) return NULL; + exif_log (d->log, EXIF_LOG_CODE_DEBUG, "ExifMnoteDataOlympus", + "Querying value for tag '%s'...", + mnote_olympus_tag_get_name (n->entries[i].tag)); + return mnote_olympus_entry_get_value (&n->entries[i], val, maxlen); +} + +static void +exif_mnote_data_olympus_save (ExifMnoteData *ne, + unsigned char **buf, unsigned int *buf_size) +{ + ExifMnoteDataOlympus *n = (ExifMnoteDataOlympus *) ne; + unsigned int i, o, s, doff, base = 0, o2 = 6; + int datao = 0; + + if (!n || !buf || !buf_size) return; + + /* + * Allocate enough memory for all entries and the number of entries. + */ + *buf_size = 6 + 2 + 2 + n->count * 12; + switch (n->version) { + case 0: /* Olympus */ + *buf = exif_mem_alloc (ne->mem, *buf_size); + if (!*buf) return; + + /* Write the header and the number of entries. */ + strcpy (*buf, "OLYMP"); + o2 += 2; + datao = n->offset; + break; + case 1: /* Nikon v1 */ + base = MNOTE_NIKON1_TAG_BASE; + *buf_size -= 8; + /* Fall through */ + case 2: /* Nikon v2 */ + *buf_size += 8; + *buf = exif_mem_alloc (ne->mem, *buf_size); + if (!*buf) return; + + /* Write the header and the number of entries. */ + strcpy (*buf, "Nikon"); + (*buf)[6] = n->version; + o2 += 2; *buf_size += 2; + if (n->version == 2) { + exif_set_short (*buf + 10, n->order, (ExifShort) ( + (n->order == EXIF_BYTE_ORDER_INTEL) ? + ('I' << 8) | 'I' : + ('M' << 8) | 'M')); + exif_set_short (*buf + 12, n->order, (ExifShort) 0x2A); + exif_set_long (*buf + 14, n->order, (ExifShort) 8); + o2 += 2 + 8; + } + datao = -10; + break; + } + + exif_set_short (*buf + o2, n->order, (ExifShort) n->count); + o2 += 2; + + /* Save each entry */ + for (i = 0; i < n->count; i++) { + o = o2 + i * 12; + exif_set_short (*buf + o + 0, n->order, + (ExifShort) (n->entries[i].tag - base)); + exif_set_short (*buf + o + 2, n->order, + (ExifShort) n->entries[i].format); + exif_set_long (*buf + o + 4, n->order, + n->entries[i].components); + o += 8; + s = exif_format_get_size (n->entries[i].format) * + n->entries[i].components; + if (s > 4) { + doff = *buf_size; + *buf_size += s; + *buf = exif_mem_realloc (ne->mem, *buf, + sizeof (char) * *buf_size); + if (!*buf) return; + exif_set_long (*buf + o, n->order, datao + doff); + } else + doff = o; + + /* Write the data. */ + if (n->entries[i].data) { + memcpy (*buf + doff, n->entries[i].data, s); + } else { + /* Most certainly damaged input file */ + memset (*buf + doff, 0, s); + } + } +} + +static void +exif_mnote_data_olympus_load (ExifMnoteData *en, + const unsigned char *buf, unsigned int buf_size) +{ + ExifMnoteDataOlympus *n = (ExifMnoteDataOlympus *) en; + ExifShort c; + unsigned int i, s, o, o2 = 0, datao = 6, base = 0; + + if (!n || !buf) return; + + /* Start of interesting data */ + o2 = 6 + n->offset; + + /* + * Olympus headers start with "OLYMP" and need to have at least + * a size of 22 bytes (6 for 'OLYMP', 2 other bytes, 2 for the + * number of entries, and 12 for one entry. + * + * Nikon headers start with "Nikon" (6 bytes including '\0'), + * version number (1 or 2). + * + * Version 1 continues with 0, 1, 0, number_of_tags, + * or just with number_of_tags (models D1H, D1X...). + * + * Version 2 continues with an unknown byte (0 or 10), + * two unknown bytes (0), "MM" or "II", another byte 0 and + * lastly 0x2A. + */ + if (buf_size - n->offset < 22) return; + if (!memcmp (buf + o2, "OLYMP", 5)) { + exif_log (en->log, EXIF_LOG_CODE_DEBUG, "ExifMnoteDataOlympus", + "Parsing Olympus maker note..."); + + /* The number of entries is at position 8. */ + n->version = 0; + o2 += 8; + + } else if (!memcmp (buf + o2, "Nikon", 6)) { + o2 += 6; + exif_log (en->log, EXIF_LOG_CODE_DEBUG, "ExifMnoteDataOlympus", + "Parsing Nikon maker note (0x%02x, %02x, %02x, " + "%02x, %02x, %02x, %02x, %02x)...", + buf[o2 + 0], buf[o2 + 1], buf[o2 + 2], buf[o2 + 3], + buf[o2 + 4], buf[o2 + 5], buf[o2 + 6], buf[o2 + 7]); + + /* The first byte is the version. */ + if (o2 >= buf_size) return; + n->version = buf[o2]; + o2 += 1; + + /* Skip an unknown byte (00 or 0A). */ + o2 += 1; + + switch (n->version) { + case 1: + + base = MNOTE_NIKON1_TAG_BASE; + break; + + case 2: + + /* Skip 2 unknown bytes (00 00). */ + o2 += 2; + + /* + * Byte order. From here the data offset + * gets calculated. + */ + datao = o2; + if (o2 >= buf_size) return; + if (!strncmp (&buf[o2], "II", 2)) + n->order = EXIF_BYTE_ORDER_INTEL; + else if (!strncmp (&buf[o2], "MM", 2)) + n->order = EXIF_BYTE_ORDER_MOTOROLA; + else { + exif_log (en->log, EXIF_LOG_CODE_DEBUG, + "ExifMnoteDatalympus", "Unknown " + "byte order '%c%c'", buf[o2], + buf[o2 + 1]); + return; + } + o2 += 2; + + /* Skip 2 unknown bytes (00 2A). */ + o2 += 2; + + /* Go to where the number of entries is. */ + if (o2 >= buf_size) return; + o2 = datao + exif_get_long (buf + o2, n->order); + break; + + default: + exif_log (en->log, EXIF_LOG_CODE_DEBUG, + "ExifMnoteDataOlympus", "Unknown version " + "number %i.", n->version); + return; + } + } else if (!memcmp (buf + o2, "\0\x1b", 2)) { + n->version = 2; + } else { + return; + } + + /* Number of entries */ + if (o2 >= buf_size) return; + c = exif_get_short (buf + o2, n->order); + o2 += 2; + + /* Read the number of entries and remove old ones. */ + exif_mnote_data_olympus_clear (n); + + n->entries = exif_mem_alloc (en->mem, sizeof (MnoteOlympusEntry) * c); + if (!n->entries) return; + + /* Parse the entries */ + for (i = 0; i < c; i++) { + o = o2 + 12 * i; + if (o + 12 > buf_size) return; + + n->count = i + 1; + n->entries[i].tag = exif_get_short (buf + o, n->order) + base; + n->entries[i].format = exif_get_short (buf + o + 2, n->order); + n->entries[i].components = exif_get_long (buf + o + 4, n->order); + n->entries[i].order = n->order; + + exif_log (en->log, EXIF_LOG_CODE_DEBUG, "ExifMnoteOlympus", + "Loading entry 0x%x ('%s')...", n->entries[i].tag, + mnote_olympus_tag_get_name (n->entries[i].tag)); + + /* + * Size? If bigger than 4 bytes, the actual data is not + * in the entry but somewhere else (offset). + */ + s = exif_format_get_size (n->entries[i].format) * + n->entries[i].components; + if (!s) continue; + o += 8; + if (s > 4) o = exif_get_long (buf + o, n->order) + datao; + if (o + s > buf_size) continue; + + /* Sanity check */ + n->entries[i].data = exif_mem_alloc (en->mem, s); + if (!n->entries[i].data) continue; + n->entries[i].size = s; + memcpy (n->entries[i].data, buf + o, s); + } +} + +static unsigned int +exif_mnote_data_olympus_count (ExifMnoteData *n) +{ + return n ? ((ExifMnoteDataOlympus *) n)->count : 0; +} + +static unsigned int +exif_mnote_data_olympus_get_id (ExifMnoteData *d, unsigned int n) +{ + ExifMnoteDataOlympus *note = (ExifMnoteDataOlympus *) d; + + if (!note) return 0; + if (note->count <= n) return 0; + return note->entries[n].tag; +} + +static const char * +exif_mnote_data_olympus_get_name (ExifMnoteData *d, unsigned int i) +{ + ExifMnoteDataOlympus *n = (ExifMnoteDataOlympus *) d; + + if (!n) return NULL; + if (i >= n->count) return NULL; + return mnote_olympus_tag_get_name (n->entries[i].tag); +} + +static const char * +exif_mnote_data_olympus_get_title (ExifMnoteData *d, unsigned int i) +{ + ExifMnoteDataOlympus *n = (ExifMnoteDataOlympus *) d; + + if (!n) return NULL; + if (i >= n->count) return NULL; + return mnote_olympus_tag_get_title (n->entries[i].tag); +} + +static const char * +exif_mnote_data_olympus_get_description (ExifMnoteData *d, unsigned int i) +{ + ExifMnoteDataOlympus *n = (ExifMnoteDataOlympus *) d; + + if (!n) return NULL; + if (i >= n->count) return NULL; + return mnote_olympus_tag_get_title (n->entries[i].tag); +} + +static void +exif_mnote_data_olympus_set_byte_order (ExifMnoteData *d, ExifByteOrder o) +{ + ExifByteOrder o_orig; + ExifMnoteDataOlympus *n = (ExifMnoteDataOlympus *) d; + unsigned int i; + + if (!n) return; + + o_orig = n->order; + n->order = o; + for (i = 0; i < n->count; i++) { + n->entries[i].order = o; + exif_array_set_byte_order (n->entries[i].format, n->entries[i].data, + n->entries[i].components, o_orig, o); + } +} + +static void +exif_mnote_data_olympus_set_offset (ExifMnoteData *n, unsigned int o) +{ + if (n) ((ExifMnoteDataOlympus *) n)->offset = o; +} + +ExifMnoteData * +exif_mnote_data_olympus_new (ExifMem *mem) +{ + ExifMnoteData *d; + + if (!mem) return NULL; + + d = exif_mem_alloc (mem, sizeof (ExifMnoteDataOlympus)); + if (!d) return NULL; + + exif_mnote_data_construct (d, mem); + + /* Set up function pointers */ + d->methods.free = exif_mnote_data_olympus_free; + d->methods.set_byte_order = exif_mnote_data_olympus_set_byte_order; + d->methods.set_offset = exif_mnote_data_olympus_set_offset; + d->methods.load = exif_mnote_data_olympus_load; + d->methods.save = exif_mnote_data_olympus_save; + d->methods.count = exif_mnote_data_olympus_count; + d->methods.get_id = exif_mnote_data_olympus_get_id; + d->methods.get_name = exif_mnote_data_olympus_get_name; + d->methods.get_title = exif_mnote_data_olympus_get_title; + d->methods.get_description = exif_mnote_data_olympus_get_description; + d->methods.get_value = exif_mnote_data_olympus_get_value; + + return d; +} -- cgit v1.2.3