Use MXFAsset::_interop to decide on whether to write asset XML as Interop or SMPTE.

[libdcp.git] / src / mxf_asset.cc

diff --git a/src/mxf_asset.cc b/src/mxf_asset.cc
index d52ab2cc45f318a36aba60e3bc1dbf3c763eb76a..a2ee9f25c75e28e937bf233a4c34a4c8ec6a5020 100644 (file)
--- a/src/mxf_asset.cc
+++ b/src/mxf_asset.cc
@@ -22,8 +22,8 @@
  */
 
 #include <iostream>
-#include <fstream>
 #include <boost/filesystem.hpp>
+#include <boost/lexical_cast.hpp>
 #include <libxml++/nodes/element.h>
 #include "AS_DCP.h"
 #include "KM_prng.h"
@@ -32,53 +32,30 @@
 #include "util.h"
 #include "metadata.h"
 #include "exceptions.h"
+#include "kdm.h"
 
 using std::string;
 using std::list;
+using std::pair;
 using boost::shared_ptr;
+using boost::lexical_cast;
 using boost::dynamic_pointer_cast;
 using namespace libdcp;
 
-MXFAsset::MXFAsset (string directory, string file_name)
+MXFAsset::MXFAsset (boost::filesystem::path directory, boost::filesystem::path file_name)
        : Asset (directory, file_name)
        , _progress (0)
-       , _encrypted (false)
        , _encryption_context (0)
+       , _decryption_context (0)
+       , _interop (false)
 {
 
 }
 
-MXFAsset::MXFAsset (string directory, string file_name, boost::signals2::signal<void (float)>* progress, int edit_rate, int intrinsic_duration, bool encrypted)
-       : Asset (directory, file_name, edit_rate, intrinsic_duration)
-       , _progress (progress)
-       , _encrypted (encrypted)
-       , _encryption_context (0)
-{
-       if (_encrypted) {
-               _key_id = make_uuid ();
-               uint8_t key_buffer[ASDCP::KeyLen];
-               Kumu::FortunaRNG rng;
-               rng.FillRandom (key_buffer, ASDCP::KeyLen);
-               char key_string[ASDCP::KeyLen * 4];
-               Kumu::bin2hex (key_buffer, ASDCP::KeyLen, key_string, ASDCP::KeyLen * 4);
-               _key_value = key_string;
-                       
-               _encryption_context = new ASDCP::AESEncContext;
-               if (ASDCP_FAILURE (_encryption_context->InitKey (key_buffer))) {
-                       throw MiscError ("could not set up encryption context");
-               }
-
-               uint8_t cbc_buffer[ASDCP::CBC_BLOCK_SIZE];
-               
-               if (ASDCP_FAILURE (_encryption_context->SetIVec (rng.FillRandom (cbc_buffer, ASDCP::CBC_BLOCK_SIZE)))) {
-                       throw MiscError ("could not set up CBC initialization vector");
-               }
-       }
-}
-
 MXFAsset::~MXFAsset ()
 {
        delete _encryption_context;
+       delete _decryption_context;
 }
 
 void
@@ -88,12 +65,16 @@ MXFAsset::fill_writer_info (ASDCP::WriterInfo* writer_info, string uuid, MXFMeta
        writer_info->CompanyName = metadata.company_name;
        writer_info->ProductName = metadata.product_name.c_str();
 
-       writer_info->LabelSetType = ASDCP::LS_MXF_SMPTE;
+       if (_interop) {
+               writer_info->LabelSetType = ASDCP::LS_MXF_INTEROP;
+       } else {
+               writer_info->LabelSetType = ASDCP::LS_MXF_SMPTE;
+       }
        unsigned int c;
        Kumu::hex2bin (uuid.c_str(), writer_info->AssetUUID, Kumu::UUID_Length, &c);
        assert (c == Kumu::UUID_Length);
 
-       if (_encrypted) {
+       if (_key) {
                Kumu::GenRandomUUID (writer_info->ContextID);
                writer_info->EncryptedEssence = true;
 
@@ -127,9 +108,48 @@ MXFAsset::equals (shared_ptr<const Asset> other, EqualityOptions opt, boost::fun
 }
 
 void
-MXFAsset::add_typed_key_id (xmlpp::Element* parent) const
+MXFAsset::write_to_cpl (xmlpp::Element* node) const
+{
+       pair<string, string> const attr = cpl_node_attribute ();
+       xmlpp::Element* a = node->add_child (cpl_node_name ());
+       if (!attr.first.empty ()) {
+               a->set_attribute (attr.first, attr.second);
+       }
+       a->add_child ("Id")->add_child_text ("urn:uuid:" + _uuid);
+       a->add_child ("AnnotationText")->add_child_text (_file_name.string ());
+       a->add_child ("EditRate")->add_child_text (lexical_cast<string> (_edit_rate) + " 1");
+       a->add_child ("IntrinsicDuration")->add_child_text (lexical_cast<string> (_intrinsic_duration));
+       a->add_child ("EntryPoint")->add_child_text (lexical_cast<string> (_entry_point));
+       a->add_child ("Duration")->add_child_text (lexical_cast<string> (_duration));
+       if (!_key_id.empty ()) {
+               a->add_child("KeyId")->add_child_text ("urn:uuid:" + _key_id);
+       }
+}
+
+void
+MXFAsset::set_key (Key key)
 {
-       xmlpp::Element* typed_key_id = parent->add_child("TypedKeyId");
-       typed_key_id->add_child("KeyType")->add_child_text(key_type ());
-       typed_key_id->add_child("KeyId")->add_child_text("urn:uuid:" + _key_id);
+       _key = key;
+
+       if (_key_id.empty ()) {
+               /* No key ID so far; we now need one */
+               _key_id = make_uuid ();
+       }
+       
+       _decryption_context = new ASDCP::AESDecContext;
+       if (ASDCP_FAILURE (_decryption_context->InitKey (_key->value ()))) {
+               throw MiscError ("could not set up decryption context");
+       }
+
+       _encryption_context = new ASDCP::AESEncContext;
+       if (ASDCP_FAILURE (_encryption_context->InitKey (_key->value ()))) {
+               throw MiscError ("could not set up encryption context");
+       }
+       
+       uint8_t cbc_buffer[ASDCP::CBC_BLOCK_SIZE];
+       
+       Kumu::FortunaRNG rng;
+       if (ASDCP_FAILURE (_encryption_context->SetIVec (rng.FillRandom (cbc_buffer, ASDCP::CBC_BLOCK_SIZE)))) {
+               throw MiscError ("could not set up CBC initialization vector");
+       }
 }