1 files changed, 135 insertions, 0 deletions
diff --git a/src/atom_sound.cpp b/src/atom_sound.cpp
new file mode 100644
index 0000000..dc348c4
--- /dev/null
+++ b/src/atom_sound.cpp
@@ -0,0 +1,135 @@
+/*
+ * 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. 2004.  All Rights Reserved.
+ *
+ * Contributor(s):
+ *      Bill May        wmay@cisco.com
+ */
+
+#include "src/impl.h"
+
+namespace mp4v2 {
+namespace impl {
+
+///////////////////////////////////////////////////////////////////////////////
+
+MP4SoundAtom::MP4SoundAtom(const char *atomid)
+        : MP4Atom(atomid)
+{
+    AddReserved("reserved1", 6); /* 0 */
+
+    AddProperty( /* 1 */
+        new MP4Integer16Property("dataReferenceIndex"));
+    AddProperty( /* 2 */
+        new MP4Integer16Property("soundVersion"));
+    AddReserved( "reserved2", 6); /* 3 */
+
+    AddProperty( /* 4 */
+        new MP4Integer16Property("channels"));
+    AddProperty( /* 5 */
+        new MP4Integer16Property("sampleSize"));
+    AddProperty( /* 6 */
+        new MP4Integer16Property("packetSize"));
+    AddProperty( /* 7 */
+        new MP4Integer32Property("timeScale"));
+
+    if (ATOMID(atomid) == ATOMID("mp4a")) {
+        AddReserved("reserved3", 2); /* 8 */
+        ExpectChildAtom("esds", Required, OnlyOne);
+        ExpectChildAtom("wave", Optional, OnlyOne);
+    } else if (ATOMID(atomid) == ATOMID("alac")) {
+        AddReserved("reserved3", 2); /* 8 */
+        ExpectChildAtom("alac", Optional, Optional);
+        //AddProperty( new MP4BytesProperty("alacInfo", 36));
+    }
+}
+
+void MP4SoundAtom::AddProperties (uint8_t version)
+{
+    if (version > 0) {
+        AddProperty( /* 8 */
+            new MP4Integer32Property("samplesPerPacket"));
+        AddProperty( /* 9 */
+            new MP4Integer32Property("bytesPerPacket"));
+        AddProperty( /* 10 */
+            new MP4Integer32Property("bytesPerFrame"));
+        AddProperty( /* 11 */
+            new MP4Integer32Property("bytesPerSample"));
+    }
+    if (version == 2) {
+        AddReserved("reserved4", 20);
+    }
+}
+void MP4SoundAtom::Generate()
+{
+    MP4Atom::Generate();
+
+    ((MP4Integer16Property*)m_pProperties[1])->SetValue(1);
+
+    // property reserved2 has non-zero fixed values
+    ((MP4Integer16Property*)m_pProperties[2])->SetValue(0);
+    static const uint8_t reserved2[6] = {
+        0x00, 0x00, 0x00, 0x00,
+        0x00, 0x00,
+    };
+    m_pProperties[3]->SetReadOnly(false);
+    ((MP4BytesProperty*)m_pProperties[3])->
+    SetValue(reserved2, sizeof(reserved2));
+    m_pProperties[3]->SetReadOnly(true);
+    ((MP4Integer16Property*)m_pProperties[4])->SetValue(2);
+    ((MP4Integer16Property*)m_pProperties[5])->SetValue(0x0010);
+    ((MP4Integer16Property*)m_pProperties[6])->SetValue(0);
+
+}
+
+void MP4SoundAtom::Read()
+{
+    MP4Atom *parent = GetParentAtom();
+    if (ATOMID(parent->GetType()) != ATOMID("stsd")) {
+        // Quicktime has an interesting thing - they'll put an mp4a atom
+        // which is blank inside a wave atom, which is inside an mp4a atom
+        // we have a mp4a inside an wave inside an mp4a - delete all properties
+        m_pProperties.Delete(8);
+        m_pProperties.Delete(7);
+        m_pProperties.Delete(6);
+        m_pProperties.Delete(5);
+        m_pProperties.Delete(4);
+        m_pProperties.Delete(3);
+        m_pProperties.Delete(2);
+        m_pProperties.Delete(1);
+        m_pProperties.Delete(0);
+        if (ATOMID(GetType()) == ATOMID("alac")) {
+            AddProperty(new MP4BytesProperty("decoderConfig", m_size));
+            ReadProperties();
+        }
+        if (m_pChildAtomInfos.Size() > 0) {
+            ReadChildAtoms();
+        }
+    } else {
+        ReadProperties(0, 3); // read first 3 properties
+        AddProperties(((MP4IntegerProperty *)m_pProperties[2])->GetValue());
+        ReadProperties(3); // continue
+        if (m_pChildAtomInfos.Size() > 0) {
+            ReadChildAtoms();
+        }
+    }
+    Skip();
+}
+
+///////////////////////////////////////////////////////////////////////////////
+
+}
+} // namespace mp4v2::impl