NPT_Result
GPAC_MediaController::Browse(GPAC_MediaServerItem *server, const char *object_id, const char *filter)
{
NPT_Result res = NPT_FAILURE;
NPT_Int32 index = 0;
// reset output params
server->m_BrowseResults = NULL;
do {
PLT_BrowseDataReference browse_data(new PLT_BrowseData());
// send off the browse packet. Note that this will
// not block. There is a call to WaitForResponse in order
// to block until the response comes back.
res = Browse(browse_data,
server->m_device,
(const char*)object_id,
index,
1024,
false,
filter,
"");
NPT_CHECK_LABEL_WARNING(res, done);
if (NPT_FAILED(browse_data->res)) {
res = browse_data->res;
NPT_CHECK_LABEL_WARNING(res, done);
}
if (browse_data->info.items->GetItemCount() == 0)
break;
if (server->m_BrowseResults.IsNull()) {
server->m_BrowseResults = browse_data->info.items;
} else {
server->m_BrowseResults->Add(*browse_data->info.items);
// clear the list items so that the data inside is not
// cleaned up by PLT_MediaItemList dtor since we copied
// each pointer into the new list.
browse_data->info.items->Clear();
}
// stop now if our list contains exactly what the server said it had
if (browse_data->info.tm && browse_data->info.tm == server->m_BrowseResults->GetItemCount())
break;
// ask for the next chunk of entries
index = server->m_BrowseResults->GetItemCount();
} while(1);
done:
return res;
}
/*----------------------------------------------------------------------
| PLT_SyncMediaBrowser::BrowseSync
+---------------------------------------------------------------------*/
NPT_Result
PLT_SyncMediaBrowser::BrowseSync(PLT_DeviceDataReference& device,
const char* object_id,
PLT_MediaObjectListReference& list,
bool metadata, /* = false */
NPT_Int32 start, /* = 0 */
NPT_Cardinal max_results /* = 0 */)
{
NPT_Result res = NPT_FAILURE;
NPT_Int32 index = start;
// reset output params
list = NULL;
// look into cache first
if (m_UseCache && NPT_SUCCEEDED(m_Cache.Get(device->GetUUID(), object_id, list))) return NPT_SUCCESS;
do {
PLT_BrowseDataReference browse_data(new PLT_BrowseData());
// send off the browse packet. Note that this will
// not block. There is a call to WaitForResponse in order
// to block until the response comes back.
res = BrowseSync(
browse_data,
device,
(const char*)object_id,
index,
metadata?1:30, // DLNA recommendations for browsing children is no more than 30 at a time
metadata);
NPT_CHECK_LABEL_WARNING(res, done);
if (NPT_FAILED(browse_data->res)) {
res = browse_data->res;
NPT_CHECK_LABEL_WARNING(res, done);
}
if (browse_data->info.items->GetItemCount() == 0)
break;
if (list.IsNull()) {
list = browse_data->info.items;
} else {
list->Add(*browse_data->info.items);
// clear the list items so that the data inside is not
// cleaned up by PLT_MediaItemList dtor since we copied
// each pointer into the new list.
browse_data->info.items->Clear();
}
// stop now if our list contains exactly what the server said it had.
// Note that the server could return 0 if it didn't know how many items were
// available. In this case we have to continue browsing until
// nothing is returned back by the server.
// Unless we were told to stop after reaching a certain amount to avoid
// length delays
if ((browse_data->info.tm && browse_data->info.tm == list->GetItemCount()) ||
(max_results && list->GetItemCount() >= max_results))
break;
// ask for the next chunk of entries
index = list->GetItemCount();
} while(1);
done:
// cache the result
if (m_UseCache && NPT_SUCCEEDED(res) && !list.IsNull() && list->GetItemCount()) {
m_Cache.Put(device->GetUUID(), object_id, list);
}
// clear entire cache data for device if failed, the device could be gone
if (NPT_FAILED(res) && m_UseCache) m_Cache.Clear(device->GetUUID());
return res;
}
/*----------------------------------------------------------------------
| PLT_SyncMediaBrowser::Browse
+---------------------------------------------------------------------*/
NPT_Result
PLT_SyncMediaBrowser::Browse(PLT_DeviceDataReference& device,
const char* object_id,
PLT_MediaObjectListReference& list)
{
NPT_Result res = NPT_FAILURE;
NPT_Int32 index = 0;
// reset output params
list = NULL;
// look into cache first
if (m_UseCache && NPT_SUCCEEDED(m_Cache.Get(device->GetUUID(), object_id, list))) return NPT_SUCCESS;
do {
PLT_BrowseDataReference browse_data(new PLT_BrowseData());
// send off the browse packet. Note that this will
// not block. There is a call to WaitForResponse in order
// to block until the response comes back.
res = Browse(browse_data,
device,
(const char*)object_id,
index,
1024,
false,
"*",
"");
NPT_CHECK_LABEL_WARNING(res, done);
if (NPT_FAILED(browse_data->res)) {
res = browse_data->res;
NPT_CHECK_LABEL_WARNING(res, done);
}
if (browse_data->info.items->GetItemCount() == 0)
break;
if (list.IsNull()) {
list = browse_data->info.items;
} else {
list->Add(*browse_data->info.items);
// clear the list items so that the data inside is not
// cleaned up by PLT_MediaItemList dtor since we copied
// each pointer into the new list.
browse_data->info.items->Clear();
}
// stop now if our list contains exactly what the server said it had
if (browse_data->info.tm && browse_data->info.tm == list->GetItemCount())
break;
// ask for the next chunk of entries
index = list->GetItemCount();
} while(1);
done:
// cache the result
if (m_UseCache && NPT_SUCCEEDED(res) && !list.IsNull() && list->GetItemCount()) {
m_Cache.Put(device->GetUUID(), object_id, list);
}
// clear entire cache data for device if failed, the device could be gone
if (NPT_FAILED(res) && m_UseCache) m_Cache.Clear(device->GetUUID());
return res;
}