/*
jitterbuffer.cc
Copyright (C) 2016 Belledonne Communications, Grenoble, France 

This library is free software; you can redistribute it and/or modify it
under the terms of the GNU Lesser General Public License as published by
the Free Software Foundation; either version 2.1 of the License, or (at
your option) any later version.

This library is distributed in the hope that it will be useful, but WITHOUT
ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
FITNESS FOR A PARTICULAR PURPOSE.  See the GNU Lesser General Public
License for more details.

You should have received a copy of the GNU Lesser General Public License
along with this library; if not, write to the Free Software Foundation,
Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301  USA
*/

#include "jitterbuffer.h"
#include <iostream>

#include <mediastreamer2/msrtp.h>
#include <private.h>
using namespace::std;


class JitterBufferResponse : public Response{
public:
	JitterBufferResponse(LinphoneCore *lc,bool audio, bool video){
		ostringstream ostr;
		if (audio)
			ostr<<"audio-jitter-buffer-size: "<<linphone_core_get_audio_jittcomp(lc)<<endl;
		if (video)
			ostr<<"video-jitter-buffer-size: "<<linphone_core_get_video_jittcomp(lc)<<endl;
		setBody(ostr.str());
	}
};

JitterBufferCommand::JitterBufferCommand() : DaemonCommand("jitter-buffer",
	"jitter-buffer [audio|video] [size <milliseconds>]",
	"Control jitter buffer parameters.\n"
	"jitter-buffer [audio|video] size <milliseconds>: sets the nominal jitter buffer size in milliseconds. Has no effect in a running call.\n"
	"jitter-buffer [audio|video]: gets the nominal jitter buffer size."
	){
	addExample(new DaemonCommandExample("jitter-buffer","Status: Ok\n\n"
				"audio-jitter-buffer-size: 60\nvideo-jitter-buffer-size: 60\n"));
	addExample(new DaemonCommandExample("jitter-buffer audio","Status: Ok\n\n"
				"audio-jitter-buffer-size: 60\n"));
	addExample(new DaemonCommandExample("jitter-buffer audio size 80","Status: Ok\n\n"
				"audio-jitter-buffer-size: 80\n"));
}


void JitterBufferCommand::exec(Daemon *app, const string& args) {
	istringstream istr(args);
	string arg1;
	istr >> arg1;
	if (istr.fail()){
		app->sendResponse(JitterBufferResponse(app->getCore(), true, true));
		return;
	}
	if (arg1 != "audio" && arg1 != "video") {
		app->sendResponse(Response("Invalid argument."));
		return;
	}
	string arg2;
	istr >> arg2;
	if (istr.fail()) {
		app->sendResponse(JitterBufferResponse(app->getCore(), arg1 == "audio", arg1 == "video"));
		return;
	}
	if (arg2 == "size") {
		int arg3;
		istr >> arg3;
		if (istr.fail()) {
			app->sendResponse(Response("Bad command argument."));
			return;
		}
		if (arg1 == "audio")
			linphone_core_set_audio_jittcomp(app->getCore(), arg3);
		else if (arg1=="video")
			linphone_core_set_video_jittcomp(app->getCore(), arg3);
	}
	app->sendResponse(JitterBufferResponse(app->getCore(), arg1 == "audio", arg1 == "video"));
}

JitterBufferResetCommand::JitterBufferResetCommand() : DaemonCommand("jitter-buffer-reset",
	"jitter-buffer-reset call|stream <id> [audio|video]" ,
	"Reset the RTP jitter buffer for a given call or stream id and stream type."
	){
	addExample(new DaemonCommandExample("jitter-buffer-reset call 3 audio",
		"Status: Ok\n"));
	addExample(new DaemonCommandExample("jitter-buffer-reset stream 12",
		"Status: Ok\n"));
}


void JitterBufferResetCommand::exec(Daemon *app, const string& args) {
	istringstream istr(args);
	string arg1;
	istr >> arg1;
	if (istr.fail()) {
		app->sendResponse(Response("Missing arguments"));
		return;
	}
	if (arg1 != "call" && arg1 != "stream") {
		app->sendResponse(Response("Invalid command syntax."));
		return;
	}
	int arg2;
	istr >> arg2;
	if (istr.fail()) {
		app->sendResponse(Response("Missing call or stream id."));
		return;
	}
	MSFilter *rtprecv = NULL;
	if (arg1 == "call") {
		LinphoneCall *call = app->findCall(arg2);
		string streamtype;
		if (call == NULL) {
			app->sendResponse(Response("No such call id"));
			return;
		}
		istr >> streamtype;
		if (streamtype == "video") {
			VideoStream *vstream = reinterpret_cast<VideoStream *>(linphone_call_get_stream(call, LinphoneStreamTypeVideo));
			rtprecv = vstream ? vstream->ms.rtprecv : NULL;
		} else {
			AudioStream *astream = reinterpret_cast<AudioStream *>(linphone_call_get_stream(call, LinphoneStreamTypeAudio));
			rtprecv = astream ? astream->ms.rtprecv : NULL;
		}
	} else {
		AudioStream *stream = app->findAudioStream(arg2);
		if (stream == NULL) {
			app->sendResponse(Response("No such stream id"));
			return;
		}
		rtprecv = stream->ms.rtprecv;
	}
	if (rtprecv == NULL) {
		app->sendResponse(Response("No such active stream"));
		return;
	}
	ms_filter_call_method_noarg(rtprecv, MS_RTP_RECV_RESET_JITTER_BUFFER);
	app->sendResponse(Response());
}