Exemple #1
0
// Apply JSON diff to clips
void Timeline::apply_json_to_clips(Json::Value change) throw(InvalidJSONKey) {

	// Get key and type of change
	string change_type = change["type"].asString();
	string clip_id = "";
	Clip *existing_clip = NULL;

	// Find id of clip (if any)
	for (int x = 0; x < change["key"].size(); x++) {
		// Get each change
		Json::Value key_part = change["key"][x];

		if (key_part.isObject()) {
			// Check for id
			if (!key_part["id"].isNull()) {
				// Set the id
				clip_id = key_part["id"].asString();

				// Find matching clip in timeline (if any)
				list<Clip*>::iterator clip_itr;
				for (clip_itr=clips.begin(); clip_itr != clips.end(); ++clip_itr)
				{
					// Get clip object from the iterator
					Clip *c = (*clip_itr);
					if (c->Id() == clip_id) {
						existing_clip = c;
						break; // clip found, exit loop
					}
				}
				break; // id found, exit loop
			}
		}
	}

	// Check for a more specific key (targetting this clip's effects)
	// For example: ["clips", {"id:123}, "effects", {"id":432}]
	if (existing_clip && change["key"].size() == 4 && change["key"][2] == "effects")
	{
		// This change is actually targetting a specific effect under a clip (and not the clip)
		EffectBase *existing_effect = NULL;
		Json::Value key_part = change["key"][3];

		if (key_part.isObject()) {
			// Check for id
			if (!key_part["id"].isNull())
			{
				// Set the id
				string effect_id = key_part["id"].asString();

				// Find matching effect in timeline (if any)
				list<EffectBase*>::iterator effect_itr;
				for (effect_itr=existing_clip->Effects().begin(); effect_itr != existing_clip->Effects().end(); ++effect_itr)
				{
					// Get effect object from the iterator
					EffectBase *e = (*effect_itr);
					if (e->Id() == effect_id) {
						existing_effect = e;

						// Apply the change to the effect directly
						apply_json_to_effects(change, existing_effect);
						return; // effect found, don't update clip
					}
				}
			}
		}
	}

	// Determine type of change operation
	if (change_type == "insert") {

		// Create new clip
		Clip *clip = new Clip();
		clip->SetJsonValue(change["value"]); // Set properties of new clip from JSON
		AddClip(clip); // Add clip to timeline

	} else if (change_type == "update") {

		// Update existing clip
		if (existing_clip)
			existing_clip->SetJsonValue(change["value"]); // Update clip properties from JSON

	} else if (change_type == "delete") {

		// Remove existing clip
		if (existing_clip)
			RemoveClip(existing_clip); // Remove clip from timeline

	}

}
Exemple #2
0
// Load Json::JsonValue into this object
void Timeline::SetJsonValue(Json::Value root) throw(InvalidFile, ReaderClosed) {

	// Close timeline before we do anything (this also removes all open and closing clips)
	Close();

	// Set parent data
	ReaderBase::SetJsonValue(root);

	if (!root["clips"].isNull()) {
		// Clear existing clips
		clips.clear();

		// loop through clips
		for (int x = 0; x < root["clips"].size(); x++) {
			// Get each clip
			Json::Value existing_clip = root["clips"][x];

			// Create Clip
			Clip *c = new Clip();

			// Load Json into Clip
			c->SetJsonValue(existing_clip);

			// Add Clip to Timeline
			AddClip(c);
		}
	}

	if (!root["effects"].isNull()) {
		// Clear existing effects
		effects.clear();

		// loop through effects
		for (int x = 0; x < root["effects"].size(); x++) {
			// Get each effect
			Json::Value existing_effect = root["effects"][x];

			// Create Effect
			EffectBase *e = NULL;

			if (!existing_effect["type"].isNull())
				// Init the matching effect object
				if (existing_effect["type"].asString() == "ChromaKey")
					e = new ChromaKey();

				else if (existing_effect["type"].asString() == "Deinterlace")
					e = new Deinterlace();

				else if (existing_effect["type"].asString() == "Mask")
					e = new Mask();

				else if (existing_effect["type"].asString() == "Negate")
					e = new Negate();

			// Load Json into Effect
			e->SetJsonValue(existing_effect);

			// Add Effect to Timeline
			AddEffect(e);
		}
	}
}