1748 Video Support in V1.0: part 2/3 : support Riffvideo

exiv2.md

@@ -117,8 +117,9 @@ and see if `enable_bmff=1`.
 - Naked codestream JXL files do not contain Exif, IPTC or XMP metadata.
 
 - Support of video files is limited. Currently **exiv2** only has some
-  rudimentary support to read metadata from quicktime and matroskavideo based video files (e.g.
-  .MOV/.MP4, MKV)
+
+  rudimentary support to read metadata from quicktime, matroska and riff based video files (e.g.
+  .MOV/.MP4, .MKV, .AVI, .WAV).
 
 
 [TOC](#TOC)

include/exiv2/image_types.hpp

@@ -35,6 +35,7 @@ enum class ImageType {
   webp,
   xmp,  ///< XMP sidecar files
   qtime,
+  riff,
   mkv,
 };
 }  // namespace Exiv2

include/exiv2/riffvideo.hpp

@@ -0,0 +1,205 @@
+// ***************************************************************** -*- C++ -*-
+/*
+ * Copyright (C) 2004-2021 Exiv2 authors
+ * This program is part of the Exiv2 distribution.
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; either version 2
+ * of the License, or (at your option) any later version.
+ *
+ * This program 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 General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * asize_t with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, 5th Floor, Boston, MA 02110-1301 USA.
+ */
+#ifndef RIFFVIDEO_HPP
+#define RIFFVIDEO_HPP
+
+// *****************************************************************************
+#include "exiv2lib_export.h"
+
+// included header files
+#include "exif.hpp"
+#include "image.hpp"
+
+// *****************************************************************************
+// namespace extensions
+namespace Exiv2 {
+
+// *****************************************************************************
+// class definitions
+
+/*!
+  @brief Class to access RIFF video files.
+ */
+class EXIV2API RiffVideo : public Image {
+ public:
+  //! @name Creators
+  //@{
+  /*!
+    @brief Constructor for a Riff video. Since the constructor
+        can not return a result, callers should check the good() method
+        after object construction to determine success or failure.
+    @param io An auto-pointer that owns a BasicIo instance used for
+        reading and writing image metadata. \b Important: The constructor
+        takes ownership of the passed in BasicIo instance through the
+        auto-pointer. Callers should not continue to use the BasicIo
+        instance after it is passed to this method. Use the Image::io()
+        method to get a temporary reference.
+   */
+  explicit RiffVideo(BasicIo::UniquePtr io);
+
+  //! Copy constructor
+  RiffVideo(const RiffVideo& rhs) = delete;
+  //! Assignment operator
+  RiffVideo& operator=(const RiffVideo& rhs) = delete;
+
+  //@}
+
+  //! @name Manipulators
+  //@{
+  void printStructure(std::ostream& out, PrintStructureOption option, size_t depth) override;
+  void readMetadata() override;
+  void writeMetadata() override;
+  //@}
+
+  //! @name Accessors
+  //@{
+  [[nodiscard]] std::string mimeType() const override;
+  [[nodiscard]] const char* printAudioEncoding(uint64_t i);
+  //@}
+
+ protected:
+  /*!
+    @brief Check for a valid tag and decode the block at the current IO
+    position. Calls tagDecoder() or skips to next tag, if required.
+   */
+  void decodeBlock();
+  /*!
+    @brief Interpret tag information, and call the respective function
+        to save it in the respective XMP container. Decodes a Tag
+        Information and saves it in the respective XMP container, if
+        the block size is small.
+    @param buf Data buffer which cotains tag ID.
+    @param size Size of the data block used to store Tag Information.
+   */
+  void tagDecoder(Exiv2::DataBuf& buf, size_t size);
+  /*!
+    @brief Interpret Junk tag information, and save it
+        in the respective XMP container.
+    @param size Size of the data block used to store Tag Information.
+   */
+  void junkHandler(size_t size);
+  /*!
+    @brief Interpret Stream tag information, and save it
+        in the respective XMP container.
+    @param size Size of the data block used to store Tag Information.
+   */
+  void streamHandler(size_t size);
+  /*!
+    @brief Interpret Stream Format tag information, and save it
+        in the respective XMP container.
+    @param size Size of the data block used to store Tag Information.
+   */
+  void streamFormatHandler(size_t size);
+  /*!
+    @brief Interpret Riff Header tag information, and save it
+        in the respective XMP container.
+    @param size Size of the data block used to store Tag Information.
+   */
+  void aviHeaderTagsHandler(size_t size);
+  /*!
+    @brief Interpret Riff List tag information, and save it
+        in the respective XMP container.
+    @param size Size of the data block used to store Tag Information.
+   */
+  void listHandler(size_t size);
+  /*!
+    @brief Interpret Riff Stream Data tag information, and save it
+        in the respective XMP container.
+    @param size Size of the data block used to store Tag Information.
+   */
+  void streamDataTagHandler(size_t size);
+  /*!
+    @brief Interpret INFO tag information, and save it
+        in the respective XMP container.
+   */
+  void infoTagsHandler();
+  /*!
+    @brief Interpret Nikon Tags related to Video information, and
+        save it in the respective XMP container.
+   */
+  void nikonTagsHandler();
+  /*!
+    @brief Interpret OpenDML tag information, and save it
+        in the respective XMP container.
+   */
+  void odmlTagsHandler();
+  //! @brief Skips Particular Blocks of Metadata List.
+  void skipListData();
+  /*!
+    @brief Interprets DateTimeOriginal tag or stream name tag
+        information, and save it in the respective XMP container.
+    @param size Size of the data block used to store Tag Information.
+    @param i parameter used to overload function
+   */
+  void dateTimeOriginal(size_t size, int i = 0);
+  /*!
+    @brief Calculates Sample Rate of a particular stream.
+    @param buf Data buffer with the dividend.
+    @param divisor The Divisor required to calculate sample rate.
+    @return Return the sample rate of the stream.
+   */
+  [[nodiscard]] double returnSampleRate(Exiv2::DataBuf& buf, size_t divisor = 1);
+  /*!
+    @brief Calculates Aspect Ratio of a video, and stores it in the
+        respective XMP container.
+    @param width Width of the video.
+    @param height Height of the video.
+   */
+  void fillAspectRatio(size_t width = 1, size_t height = 1);
+  /*!
+    @brief Calculates Duration of a video, and stores it in the
+        respective XMP container.
+    @param frame_rate Frame rate of the video.
+    @param frame_count Total number of frames present in the video.
+   */
+  void fillDuration(double frame_rate, size_t frame_count);
+
+  [[nodiscard]] bool equalsRiffTag(Exiv2::DataBuf& buf, const char* str);
+
+ private:
+  static constexpr int RIFF_TAG_SIZE = 0x4;
+  static constexpr auto RIFF_CHUNK_HEADER_ICCP = "ICCP";
+  static constexpr auto RIFF_CHUNK_HEADER_EXIF = "EXIF";
+  static constexpr auto RIFF_CHUNK_HEADER_XMP = "XMP ";
+  //! Variable to check the end of metadata traversing.
+  bool continueTraversing_;
+  //! Variable which stores current stream being processsed.
+  int streamType_;
+
+};  // Class RiffVideo
+
+// *****************************************************************************
+// template, inline and free functions
+
+// These could be static private functions on Image subclasses but then
+// ImageFactory needs to be made a friend.
+/*!
+  @brief Create a new RiffVideo instance and return an auto-pointer to it.
+      Caller owns the returned object and the auto-pointer ensures that
+      it will be deleted.
+ */
+EXIV2API Image::UniquePtr newRiffInstance(BasicIo::UniquePtr io, bool create);
+
+//! Check if the file iIo is a Riff Video.
+EXIV2API bool isRiffType(BasicIo& iIo, bool advance);
+
+}  // namespace Exiv2
+
+#endif  // RIFFVIDEO_HPP

src/CMakeLists.txt

@@ -71,6 +71,7 @@ set(PUBLIC_HEADERS
     ../include/exiv2/properties.hpp
     ../include/exiv2/psdimage.hpp
     ../include/exiv2/rafimage.hpp
+    ../include/exiv2/riffvideo.hpp
     ../include/exiv2/rw2image.hpp
     ../include/exiv2/slice.hpp
     ../include/exiv2/tags.hpp
@@ -116,6 +117,7 @@ add_library( exiv2lib
     properties.cpp
     psdimage.cpp
     rafimage.cpp
+    riffvideo.cpp
     rw2image.cpp
     tags.cpp
     tgaimage.cpp

src/image.cpp

@@ -32,6 +32,7 @@
 #include "psdimage.hpp"
 #include "quicktimevideo.hpp"
 #include "rafimage.hpp"
+#include "riffvideo.hpp"
 #include "rw2image.hpp"
 #include "tags_int.hpp"
 #include "tgaimage.hpp"
@@ -101,6 +102,7 @@ constexpr auto registry = std::array{
     // needs to be before bmff because some ftyp files are handled as qt and
     // the rest should fall through to bmff
     Registry{ImageType::qtime, newQTimeInstance, isQTimeType, amRead, amNone, amRead, amNone},
+    Registry{ImageType::riff, newRiffInstance, isRiffType, amRead, amNone, amRead, amNone},
     Registry{ImageType::mkv, newMkvInstance, isMkvType, amRead, amNone, amRead, amNone},
 
 #ifdef EXV_ENABLE_BMFF