1 files changed, 157 insertions, 0 deletions
diff --git a/src/atom_rtp.cpp b/src/atom_rtp.cpp
new file mode 100644
index 0000000..5171c83
--- /dev/null
+++ b/src/atom_rtp.cpp
@@ -0,0 +1,157 @@
+/*
+ * The contents of this file are subject to the Mozilla Public
+ * License Version 1.1 (the "License"); you may not use this file
+ * except in compliance with the License. You may obtain a copy of
+ * the License at http://www.mozilla.org/MPL/
+ *
+ * Software distributed under the License is distributed on an "AS
+ * IS" basis, WITHOUT WARRANTY OF ANY KIND, either express or
+ * implied. See the License for the specific language governing
+ * rights and limitations under the License.
+ *
+ * The Original Code is MPEG4IP.
+ *
+ * The Initial Developer of the Original Code is Cisco Systems Inc.
+ * Portions created by Cisco Systems Inc. are
+ * Copyright (C) Cisco Systems Inc. 2001.  All Rights Reserved.
+ *
+ * Contributor(s):
+ *      Dave Mackie     dmackie@cisco.com
+ */
+
+#include "src/impl.h"
+
+namespace mp4v2 {
+namespace impl {
+
+///////////////////////////////////////////////////////////////////////////////
+
+MP4RtpAtom::MP4RtpAtom()
+        : MP4Atom("rtp ")
+{
+    // The atom type "rtp " is used in two complete unrelated ways
+    // i.e. it's real two atoms with the same name
+    // To handle that we need to postpone property creation until
+    // we know who our parent atom is (stsd or hnti) which gives us
+    // the context info we need to know who we are
+}
+
+void MP4RtpAtom::AddPropertiesStsdType()
+{
+    AddReserved("reserved1", 6); /* 0 */
+
+    AddProperty( /* 1 */
+        new MP4Integer16Property("dataReferenceIndex"));
+
+    AddProperty( /* 2 */
+        new MP4Integer16Property("hintTrackVersion"));
+    AddProperty( /* 3 */
+        new MP4Integer16Property("highestCompatibleVersion"));
+    AddProperty( /* 4 */
+        new MP4Integer32Property("maxPacketSize"));
+
+    ExpectChildAtom("tims", Required, OnlyOne);
+    ExpectChildAtom("tsro", Optional, OnlyOne);
+    ExpectChildAtom("snro", Optional, OnlyOne);
+}
+
+void MP4RtpAtom::AddPropertiesHntiType()
+{
+    MP4StringProperty* pProp =
+        new MP4StringProperty("descriptionFormat");
+    pProp->SetFixedLength(4);
+    AddProperty(pProp); /* 0 */
+
+    AddProperty( /* 1 */
+        new MP4StringProperty("sdpText"));
+}
+
+void MP4RtpAtom::Generate()
+{
+    if (!strcmp(m_pParentAtom->GetType(), "stsd")) {
+        AddPropertiesStsdType();
+        GenerateStsdType();
+    } else if (!strcmp(m_pParentAtom->GetType(), "hnti")) {
+        AddPropertiesHntiType();
+        GenerateHntiType();
+    } else {
+        VERBOSE_WARNING(m_pFile->GetVerbosity(),
+                        printf("Warning: rtp atom in unexpected context, can not generate"));
+    }
+}
+
+void MP4RtpAtom::GenerateStsdType()
+{
+    // generate children
+    MP4Atom::Generate();
+
+    ((MP4Integer16Property*)m_pProperties[1])->SetValue(1);
+    ((MP4Integer16Property*)m_pProperties[2])->SetValue(1);
+    ((MP4Integer16Property*)m_pProperties[3])->SetValue(1);
+}
+
+void MP4RtpAtom::GenerateHntiType()
+{
+    MP4Atom::Generate();
+
+    ((MP4StringProperty*)m_pProperties[0])->SetValue("sdp ");
+}
+
+void MP4RtpAtom::Read()
+{
+    if (!strcmp(m_pParentAtom->GetType(), "stsd")) {
+        AddPropertiesStsdType();
+        ReadStsdType();
+    } else if (!strcmp(m_pParentAtom->GetType(), "hnti")) {
+        AddPropertiesHntiType();
+        ReadHntiType();
+    } else {
+        VERBOSE_READ(m_pFile->GetVerbosity(),
+                     printf("rtp atom in unexpected context, can not read"));
+    }
+
+    Skip(); // to end of atom
+}
+
+void MP4RtpAtom::ReadStsdType()
+{
+    MP4Atom::Read();
+}
+
+void MP4RtpAtom::ReadHntiType()
+{
+    ReadProperties(0, 1);
+
+    // read sdp string, length is implicit in size of atom
+    uint64_t size = GetEnd() - m_pFile->GetPosition();
+    char* data = (char*)MP4Malloc(size + 1);
+    ASSERT(data != NULL);
+    m_pFile->ReadBytes((uint8_t*)data, size);
+    data[size] = '\0';
+    ((MP4StringProperty*)m_pProperties[1])->SetValue(data);
+    MP4Free(data);
+}
+
+void MP4RtpAtom::Write()
+{
+    if (!strcmp(m_pParentAtom->GetType(), "hnti")) {
+        WriteHntiType();
+    } else {
+        MP4Atom::Write();
+    }
+}
+
+void MP4RtpAtom::WriteHntiType()
+{
+    // since length of string is implicit in size of atom
+    // we need to handle this specially, and not write the terminating \0
+    MP4StringProperty* pSdp = (MP4StringProperty*)m_pProperties[1];
+    pSdp->SetFixedLength(strlen(pSdp->GetValue()));
+    MP4Atom::Write();
+    pSdp->SetFixedLength(0);
+}
+
+///////////////////////////////////////////////////////////////////////////////
+
+}
+} // namespace mp4v2::impl