/*----------------------------------------------------------------------
| DcfParser_Construct
+---------------------------------------------------------------------*/
static void
DcfParser_Construct(DcfParser* self, BLT_Module* module, BLT_Core* core)
{
/* construct the inherited object */
BLT_BaseMediaNode_Construct(&ATX_BASE(self, BLT_BaseMediaNode), module, core);
/* construct the members */
DcfParserInput_Construct(&self->input, module);
DcfParserOutput_Construct(&self->output);
/* look for a key manager */
ATX_Properties* properties = NULL;
if (BLT_SUCCEEDED(BLT_Core_GetProperties(core, &properties))) {
ATX_PropertyValue value;
if (ATX_SUCCEEDED(ATX_Properties_GetProperty(properties,
BLT_KEY_MANAGER_PROPERTY,
&value))) {
if (value.type == ATX_PROPERTY_VALUE_TYPE_POINTER) {
self->key_manager = (BLT_KeyManager*)value.data.pointer;
}
} else {
ATX_LOG_FINE("no key manager");
}
/* check if we need to use a cipher factory */
if (ATX_SUCCEEDED(ATX_Properties_GetProperty(properties,
BLT_CIPHER_FACTORY_PROPERTY,
&value))) {
if (value.type == ATX_PROPERTY_VALUE_TYPE_POINTER) {
self->cipher_factory = new BLT_Ap4CipherFactoryAdapter((BLT_CipherFactory*)value.data.pointer);
}
} else {
ATX_LOG_FINE("no cipher factory");
}
}
/* setup interfaces */
ATX_SET_INTERFACE_EX(self, DcfParser, BLT_BaseMediaNode, BLT_MediaNode);
ATX_SET_INTERFACE_EX(self, DcfParser, BLT_BaseMediaNode, ATX_Referenceable);
ATX_SET_INTERFACE(&self->input, DcfParserInput, BLT_MediaPort);
ATX_SET_INTERFACE(&self->input, DcfParserInput, BLT_InputStreamUser);
ATX_SET_INTERFACE(&self->output, DcfParserOutput, BLT_MediaPort);
ATX_SET_INTERFACE(&self->output, DcfParserOutput, BLT_InputStreamProvider);
}
/*----------------------------------------------------------------------
| Mp4ParserOutput_ProcessCryptoInfo
+---------------------------------------------------------------------*/
static BLT_Result
Mp4ParserOutput_ProcessCryptoInfo(Mp4ParserOutput* self,
AP4_SampleDescription*& sample_desc)
{
// check if the track is encrypted
if (sample_desc->GetType() == AP4_SampleDescription::TYPE_PROTECTED) {
ATX_LOG_FINE("track is encrypted");
AP4_ProtectedSampleDescription* prot_desc = dynamic_cast<AP4_ProtectedSampleDescription*>(sample_desc);
if (prot_desc == NULL) {
ATX_LOG_FINE("unable to obtain cipher info");
return BLT_ERROR_INVALID_MEDIA_FORMAT;
}
// obtain the key manager
if (self->parser->key_manager == NULL) {
ATX_Properties* properties = NULL;
if (BLT_SUCCEEDED(BLT_Core_GetProperties(ATX_BASE(self->parser, BLT_BaseMediaNode).core,
&properties))) {
ATX_PropertyValue value;
if (ATX_SUCCEEDED(ATX_Properties_GetProperty(properties,
BLT_KEY_MANAGER_PROPERTY,
&value))) {
if (value.type == ATX_PROPERTY_VALUE_TYPE_POINTER) {
self->parser->key_manager = (BLT_KeyManager*)value.data.pointer;
}
} else {
ATX_LOG_FINE("no key manager");
}
}
}
if (self->parser->key_manager == NULL) return BLT_ERROR_NO_MEDIA_KEY;
// check if we need to use a cipher factory
if (self->parser->cipher_factory == NULL) {
ATX_Properties* properties = NULL;
if (BLT_SUCCEEDED(BLT_Core_GetProperties(ATX_BASE(self->parser, BLT_BaseMediaNode).core,
&properties))) {
ATX_PropertyValue value;
if (ATX_SUCCEEDED(ATX_Properties_GetProperty(properties,
BLT_CIPHER_FACTORY_PROPERTY,
&value))) {
if (value.type == ATX_PROPERTY_VALUE_TYPE_POINTER) {
self->parser->cipher_factory = new BLT_Ap4CipherFactoryAdapter((BLT_CipherFactory*)value.data.pointer);
}
}
}
}
// figure out the content ID for this track
// TODO: support different content ID schemes
// for now, we just make up a content ID based on the track ID
char content_id[32];
NPT_FormatString(content_id, sizeof(content_id), "@track.%d", self->track->GetId());
// get the key for this content
unsigned int key_size = 256;
NPT_DataBuffer key(key_size);
BLT_Result result = BLT_KeyManager_GetKeyByName(self->parser->key_manager, content_id, key.UseData(), &key_size);
if (result == ATX_ERROR_NOT_ENOUGH_SPACE) {
key.SetDataSize(key_size);
result = BLT_KeyManager_GetKeyByName(self->parser->key_manager, content_id, key.UseData(), &key_size);
}
if (BLT_FAILED(result)) return BLT_ERROR_NO_MEDIA_KEY;
key.SetDataSize(key_size);
delete self->sample_decrypter;
self->sample_decrypter = AP4_SampleDecrypter::Create(prot_desc, key.GetData(), key_size, self->parser->cipher_factory);
if (self->sample_decrypter == NULL) {
ATX_LOG_FINE("unable to create decrypter");
return BLT_ERROR_CRYPTO_FAILURE;
}
// switch to the original sample description
sample_desc = prot_desc->GetOriginalSampleDescription();
}
return BLT_SUCCESS;
}
/*----------------------------------------------------------------------
| BLT_Decoder_GetProperties
+---------------------------------------------------------------------*/
BLT_Result
BLT_Decoder_GetProperties(BLT_Decoder* decoder, ATX_Properties** properties)
{
return BLT_Core_GetProperties(decoder->core, properties);
}
