lavc/tiff: add GeoTIFF support to the TIFF decoder

Work done for SOCIS 2011.

See thread:
Subject: [libav-devel] [PATCH 2/3] tiff: Add GeoTIFF support to the TIFF decoder
Date: Tue,  4 Oct 2011 00:19:52 +0200
Signed-off-by: Stefano Sabatini <stefasab@gmail.com>

libavcodec/Makefile

@@ -444,8 +444,8 @@ OBJS-$(CONFIG_TARGA_ENCODER)           += targaenc.o rle.o
 OBJS-$(CONFIG_THEORA_DECODER)          += xiph.o
 OBJS-$(CONFIG_THP_DECODER)             += mjpegdec.o mjpeg.o
 OBJS-$(CONFIG_TIERTEXSEQVIDEO_DECODER) += tiertexseqv.o
-OBJS-$(CONFIG_TIFF_DECODER)            += tiff.o lzw.o faxcompr.o
-OBJS-$(CONFIG_TIFF_ENCODER)            += tiffenc.o rle.o lzwenc.o
+OBJS-$(CONFIG_TIFF_DECODER)            += tiff.o lzw.o faxcompr.o tiff_data.o
+OBJS-$(CONFIG_TIFF_ENCODER)            += tiffenc.o rle.o lzwenc.o tiff_data.o
 OBJS-$(CONFIG_TMV_DECODER)             += tmv.o cga_data.o
 OBJS-$(CONFIG_TRUEHD_DECODER)          += mlpdec.o mlpdsp.o
 OBJS-$(CONFIG_TRUEMOTION1_DECODER)     += truemotion1.o

libavcodec/tiff.h

@@ -64,6 +64,12 @@ enum TiffTags{
     TIFF_YCBCR_SUBSAMPLING = 0x212,
     TIFF_YCBCR_POSITIONING = 0x213,
     TIFF_REFERENCE_BW = 0x214,
+    TIFF_MODEL_TIEPOINT = 0x8482,
+    TIFF_MODEL_PIXEL_SCALE = 0x830E,
+    TIFF_MODEL_TRANSFORMATION = 0x8480,
+    TIFF_GEO_KEY_DIRECTORY = 0x87AF,
+    TIFF_GEO_DOUBLE_PARAMS = 0x87B0,
+    TIFF_GEO_ASCII_PARAMS = 0x87B1
 };
 
 /** list of TIFF compression types */
@@ -86,11 +92,91 @@ enum TiffTypes{
     TIFF_SHORT,
     TIFF_LONG,
     TIFF_RATIONAL,
+    TIFF_SBYTE,
+    TIFF_UNDEFINED,
+    TIFF_SSHORT,
+    TIFF_SLONG,
+    TIFF_SRATIONAL,
+    TIFF_FLOAT,
+    TIFF_DOUBLE,
+    TIFF_IFD
+};
+
+enum TiffGeoTagKey {
+    TIFF_GT_MODEL_TYPE_GEOKEY                = 1024,
+    TIFF_GT_RASTER_TYPE_GEOKEY               = 1025,
+    TIFF_GT_CITATION_GEOKEY                  = 1026,
+    TIFF_GEOGRAPHIC_TYPE_GEOKEY              = 2048,
+    TIFF_GEOG_CITATION_GEOKEY                = 2049,
+    TIFF_GEOG_GEODETIC_DATUM_GEOKEY          = 2050,
+    TIFF_GEOG_PRIME_MERIDIAN_GEOKEY          = 2051,
+    TIFF_GEOG_LINEAR_UNITS_GEOKEY            = 2052,
+    TIFF_GEOG_LINEAR_UNIT_SIZE_GEOKEY        = 2053,
+    TIFF_GEOG_ANGULAR_UNITS_GEOKEY           = 2054,
+    TIFF_GEOG_ANGULAR_UNIT_SIZE_GEOKEY       = 2055,
+    TIFF_GEOG_ELLIPSOID_GEOKEY               = 2056,
+    TIFF_GEOG_SEMI_MAJOR_AXIS_GEOKEY         = 2057,
+    TIFF_GEOG_SEMI_MINOR_AXIS_GEOKEY         = 2058,
+    TIFF_GEOG_INV_FLATTENING_GEOKEY          = 2059,
+    TIFF_GEOG_AZIMUTH_UNITS_GEOKEY           = 2060,
+    TIFF_GEOG_PRIME_MERIDIAN_LONG_GEOKEY     = 2061,
+    TIFF_PROJECTED_CS_TYPE_GEOKEY            = 3072,
+    TIFF_PCS_CITATION_GEOKEY                 = 3073,
+    TIFF_PROJECTION_GEOKEY                   = 3074,
+    TIFF_PROJ_COORD_TRANS_GEOKEY             = 3075,
+    TIFF_PROJ_LINEAR_UNITS_GEOKEY            = 3076,
+    TIFF_PROJ_LINEAR_UNIT_SIZE_GEOKEY        = 3077,
+    TIFF_PROJ_STD_PARALLEL1_GEOKEY           = 3078,
+    TIFF_PROJ_STD_PARALLEL2_GEOKEY           = 3079,
+    TIFF_PROJ_NAT_ORIGIN_LONG_GEOKEY         = 3080,
+    TIFF_PROJ_NAT_ORIGIN_LAT_GEOKEY          = 3081,
+    TIFF_PROJ_FALSE_EASTING_GEOKEY           = 3082,
+    TIFF_PROJ_FALSE_NORTHING_GEOKEY          = 3083,
+    TIFF_PROJ_FALSE_ORIGIN_LONG_GEOKEY       = 3084,
+    TIFF_PROJ_FALSE_ORIGIN_LAT_GEOKEY        = 3085,
+    TIFF_PROJ_FALSE_ORIGIN_EASTING_GEOKEY    = 3086,
+    TIFF_PROJ_FALSE_ORIGIN_NORTHING_GEOKEY   = 3087,
+    TIFF_PROJ_CENTER_LONG_GEOKEY             = 3088,
+    TIFF_PROJ_CENTER_LAT_GEOKEY              = 3089,
+    TIFF_PROJ_CENTER_EASTING_GEOKEY          = 3090,
+    TIFF_PROJ_CENTER_NORTHING_GEOKEY         = 3091,
+    TIFF_PROJ_SCALE_AT_NAT_ORIGIN_GEOKEY     = 3092,
+    TIFF_PROJ_SCALE_AT_CENTER_GEOKEY         = 3093,
+    TIFF_PROJ_AZIMUTH_ANGLE_GEOKEY           = 3094,
+    TIFF_PROJ_STRAIGHT_VERT_POLE_LONG_GEOKEY = 3095,
+    TIFF_VERTICAL_CS_TYPE_GEOKEY             = 4096,
+    TIFF_VERTICAL_CITATION_GEOKEY            = 4097,
+    TIFF_VERTICAL_DATUM_GEOKEY               = 4098,
+    TIFF_VERTICAL_UNITS_GEOKEY               = 4099
+};
+
+enum TiffGeoTagType {
+    GEOTIFF_SHORT  = 0,
+    GEOTIFF_DOUBLE = 34736,
+    GEOTIFF_STRING = 34737
 };
 
 /** sizes of various TIFF field types (string size = 100)*/
-static const uint8_t type_sizes[6] = {
-    0, 1, 100, 2, 4, 8
+static const uint8_t type_sizes[14] = {
+    0, 1, 100, 2, 4, 8, 1, 1, 2, 4, 8, 4, 8, 4
 };
 
+typedef struct TiffGeoTag {
+    enum TiffGeoTagKey key;
+    enum TiffTags type;
+    int count;
+    int offset;
+    char *val;
+} TiffGeoTag;
+
+typedef struct TiffGeoTagKeyName {
+    const enum TiffGeoTagKey key;
+    const char *const name;
+} TiffGeoTagKeyName;
+
+typedef struct TiffGeoTagNameType {
+    const char *const name;
+    const enum TiffGeoTagType type;
+} TiffGeoTagNameType;
+
 #endif /* AVCODEC_TIFF_H */

libavcodec/tiff_data.h

+/*
+ * TIFF data tables
+ * Copyright (c) 2011 Thomas Kuehnel
+ *
+ * This file is part of Libav.
+ *
+ * Libav 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 2.1 of the License, or (at your option) any later version.
+ *
+ * Libav 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 Libav; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+
+/**
+ * @file
+ * TIFF data tables
+ * @author Thomas Kuehnel
+ * @see GeoTIFF specification at
+ * http://www.remotesensing.org/geotiff/spec/geotiffhome.html
+ */
+
+#ifndef AVCODEC_TIFF_DATA_H
+#define AVCODEC_TIFF_DATA_H
+
+#include "tiff.h"
+
+#define TIFF_CONF_KEY_ID_OFFSET 1024
+extern const TiffGeoTagNameType ff_tiff_conf_name_type_map[3];
+
+#define TIFF_GEOG_KEY_ID_OFFSET 2048
+extern const TiffGeoTagNameType ff_tiff_geog_name_type_map[14];
+
+#define TIFF_PROJ_KEY_ID_OFFSET 3072
+extern const TiffGeoTagNameType ff_tiff_proj_name_type_map[24];
+
+#define TIFF_VERT_KEY_ID_OFFSET 4096
+extern const TiffGeoTagNameType ff_tiff_vert_name_type_map[4];
+
+#define TIFF_GEO_KEY_UNDEFINED    0
+#define TIFF_GEO_KEY_USER_DEFINED 32767
+
+#define TIFF_GT_MODEL_TYPE_OFFSET 1
+extern const char *const ff_tiff_gt_model_type_codes[3];
+
+#define TIFF_GT_RASTER_TYPE_OFFSET 1
+extern const char *const ff_tiff_gt_raster_type_codes[2];
+
+#define TIFF_LINEAR_UNIT_OFFSET 9001
+extern const char *const ff_tiff_linear_unit_codes[15];
+
+#define TIFF_ANGULAR_UNIT_OFFSET 9101
+extern const char *const ff_tiff_angular_unit_codes[8];
+
+#define TIFF_GCS_TYPE_OFFSET 4201
+extern const char *const ff_tiff_gcs_type_codes[133];
+
+#define TIFF_GCSE_TYPE_OFFSET 4001
+extern const char *const ff_tiff_gcse_type_codes[35];
+
+#define TIFF_GEODETIC_DATUM_OFFSET 6201
+extern const char *const ff_tiff_geodetic_datum_codes[120];
+
+#define TIFF_GEODETIC_DATUM_E_OFFSET 6001
+extern const char *const ff_tiff_geodetic_datum_e_codes[35];
+
+#define TIFF_ELLIPSOID_OFFSET 7001
+extern const char *const ff_tiff_ellipsoid_codes[35];
+
+#define TIFF_PRIME_MERIDIAN_OFFSET 8901
+extern const char *const ff_tiff_prime_meridian_codes[11];
+
+extern const TiffGeoTagKeyName ff_tiff_proj_cs_type_codes[978];
+
+extern const TiffGeoTagKeyName ff_tiff_projection_codes[298];
+
+#define TIFF_COORD_TRANS_OFFSET 1
+extern const char *const ff_tiff_coord_trans_codes[27];
+
+#define TIFF_VERT_CS_OFFSET 5001
+extern const char *const ff_tiff_vert_cs_codes[32];
+
+#define TIFF_ORTHO_VERT_CS_OFFSET 5101
+extern const char *const ff_tiff_ortho_vert_cs_codes[6];
+#endif

libavcodec/tiffenc.c

@@ -44,8 +44,8 @@
 #define TIFF_MAX_ENTRY 32
 
 /** sizes of various TIFF field types (string size = 1)*/
-static const uint8_t type_sizes2[6] = {
-    0, 1, 1, 2, 4, 8
+static const uint8_t type_sizes2[14] = {
+    0, 1, 1, 2, 4, 8, 1, 1, 2, 4, 8, 4, 8, 4
 };
 
 typedef struct TiffEncoderContext {

libavcodec/version.h

@@ -28,7 +28,7 @@
 
 #define LIBAVCODEC_VERSION_MAJOR 54
 #define LIBAVCODEC_VERSION_MINOR  38
-#define LIBAVCODEC_VERSION_MICRO 100
+#define LIBAVCODEC_VERSION_MICRO 101
 
 #define LIBAVCODEC_VERSION_INT  AV_VERSION_INT(LIBAVCODEC_VERSION_MAJOR, \
                                                LIBAVCODEC_VERSION_MINOR, \