Added TagLib (with AUTORS and COPYING files)

[someplayer] / src / taglib / mp4 / mp4atom.cpp

diff --git a/src/taglib/mp4/mp4atom.cpp b/src/taglib/mp4/mp4atom.cpp
new file mode 100644 (file)
index 0000000..6d86a6e
--- /dev/null
+++ b/src/taglib/mp4/mp4atom.cpp
@@ -0,0 +1,197 @@
+/**************************************************************************
+    copyright            : (C) 2007 by Lukáš Lalinský
+    email                : lalinsky@gmail.com
+ **************************************************************************/
+
+/***************************************************************************
+ *   This library is free software; you can redistribute it and/or modify  *
+ *   it under the terms of the GNU Lesser General Public License version   *
+ *   2.1 as published by the Free Software Foundation.                     *
+ *                                                                         *
+ *   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                                                                   *
+ *                                                                         *
+ *   Alternatively, this file is available under the Mozilla Public        *
+ *   License Version 1.1.  You may obtain a copy of the License at         *
+ *   http://www.mozilla.org/MPL/                                           *
+ ***************************************************************************/
+
+#ifdef HAVE_CONFIG_H
+#include <config.h>
+#endif
+
+#ifdef WITH_MP4
+
+#include <tdebug.h>
+#include <tstring.h>
+#include "mp4atom.h"
+
+using namespace TagLib;
+
+const char *MP4::Atom::containers[10] = {
+    "moov", "udta", "mdia", "meta", "ilst",
+    "stbl", "minf", "moof", "traf", "trak",
+};
+
+MP4::Atom::Atom(File *file)
+{
+  offset = file->tell();
+  ByteVector header = file->readBlock(8);
+  if (header.size() != 8) {
+    // The atom header must be 8 bytes long, otherwise there is either
+    // trailing garbage or the file is truncated
+    debug("MP4: Couldn't read 8 bytes of data for atom header");
+    length = 0;
+    file->seek(0, File::End);
+    return;
+  }
+
+  length = header.mid(0, 4).toUInt();
+
+  if (length == 1) {
+    long long longLength = file->readBlock(8).toLongLong();
+    if (longLength >= 8 && longLength <= 0xFFFFFFFF) {
+        // The atom has a 64-bit length, but it's actually a 32-bit value
+        length = (long)longLength;
+    }
+    else {
+        debug("MP4: 64-bit atoms are not supported");
+        length = 0;
+        file->seek(0, File::End);
+        return;
+    }
+  }
+  if (length < 8) {
+    debug("MP4: Invalid atom size");
+    length = 0;
+    file->seek(0, File::End);
+    return;
+  }
+
+  name = header.mid(4, 4);
+
+  for(int i = 0; i < numContainers; i++) {
+    if(name == containers[i]) {
+      if(name == "meta") {
+        file->seek(4, File::Current);
+      }
+      while(file->tell() < offset + length) {
+        MP4::Atom *child = new MP4::Atom(file);
+        children.append(child);
+        if (child->length == 0)
+          return;
+      }
+      return;
+    }
+  }
+
+  file->seek(offset + length);
+}
+
+MP4::Atom::~Atom()
+{
+  for(unsigned int i = 0; i < children.size(); i++) {
+    delete children[i];
+  }
+  children.clear();
+}
+
+MP4::Atom *
+MP4::Atom::find(const char *name1, const char *name2, const char *name3, const char *name4)
+{
+  if(name1 == 0) {
+    return this;
+  }
+  for(unsigned int i = 0; i < children.size(); i++) {
+    if(children[i]->name == name1) {
+      return children[i]->find(name2, name3, name4);
+    }
+  }
+  return 0;
+}
+
+MP4::AtomList
+MP4::Atom::findall(const char *name, bool recursive)
+{
+  MP4::AtomList result;
+  for(unsigned int i = 0; i < children.size(); i++) {
+    if(children[i]->name == name) {
+      result.append(children[i]);
+    }
+    if(recursive) {
+      result.append(children[i]->findall(name, recursive));
+    }
+  }
+  return result;
+}
+
+bool
+MP4::Atom::path(MP4::AtomList &path, const char *name1, const char *name2, const char *name3)
+{
+  path.append(this);
+  if(name1 == 0) {
+    return true;
+  }
+  for(unsigned int i = 0; i < children.size(); i++) {
+    if(children[i]->name == name1) {
+      return children[i]->path(path, name2, name3);
+    }
+  }
+  return false;
+}
+
+MP4::Atoms::Atoms(File *file)
+{
+  file->seek(0, File::End);
+  long end = file->tell();
+  file->seek(0);
+  while(file->tell() + 8 <= end) {
+    MP4::Atom *atom = new MP4::Atom(file);
+    atoms.append(atom);
+    if (atom->length == 0)
+      break;
+  }
+}
+
+MP4::Atoms::~Atoms()
+{
+  for(unsigned int i = 0; i < atoms.size(); i++) {
+    delete atoms[i];
+  }
+  atoms.clear();
+}
+
+MP4::Atom *
+MP4::Atoms::find(const char *name1, const char *name2, const char *name3, const char *name4)
+{
+  for(unsigned int i = 0; i < atoms.size(); i++) {
+    if(atoms[i]->name == name1) {
+      return atoms[i]->find(name2, name3, name4);
+    }
+  }
+  return 0;
+}
+
+MP4::AtomList
+MP4::Atoms::path(const char *name1, const char *name2, const char *name3, const char *name4)
+{
+  MP4::AtomList path;
+  for(unsigned int i = 0; i < atoms.size(); i++) {
+    if(atoms[i]->name == name1) {
+      if(!atoms[i]->path(path, name2, name3, name4)) {
+        path.clear();
+      }
+      return path;
+    }
+  }
+  return path;
+}
+
+#endif