audiortp.cpp 8.59 KB
Newer Older
savoirfairelinux's avatar
savoirfairelinux committed
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36
/**
 *  Copyright (C) 2004 Savoir-Faire Linux inc.
 *  Author: Laurielle Lea <laurielle.lea@savoirfairelinux.com>
 *                                                                              
 *  This program is free software; you can redistribute it and/or modify
 *  it under the terms of the GNU General Public License as published by
 *  the Free Software Foundation; either version 2 of the License, or
 *  (at your option) any later version.
 *
 *  This program 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 General Public License for more details.
 *                                                                              
 *  You should have received a copy of the GNU General Public License
 *  along with this program; if not, write to the Free Software
 *   Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
 */

#include <cstdio>
#include <cstdlib>
#include <ccrtp/rtp.h>

#include <assert.h>
#include <stdio.h>
#include <stdlib.h>
#include <qhostaddress.h>
#include <qstring.h>

#include "audiocodec.h"
#include "configuration.h"
#include "manager.h"
#include "audiortp.h"
#include "sip.h"
#include "../stund/stun.h"

37
#include <string>
savoirfairelinux's avatar
savoirfairelinux committed
38
using namespace ost;
39
using namespace std;
savoirfairelinux's avatar
savoirfairelinux committed
40 41 42 43 44

////////////////////////////////////////////////////////////////////////////////
// AudioRtp                                                          
////////////////////////////////////////////////////////////////////////////////
AudioRtp::AudioRtp (SIP *sip, Manager *manager) {
45
	string svr;
savoirfairelinux's avatar
savoirfairelinux committed
46 47 48
	this->sip = sip;
	this->manager = manager;
	RTXThread = NULL;
49
	if (!manager->useStun()) {
50
		if (Config::gets("Signalisations", "SIP.sipproxy") == "") {
51 52 53 54 55
			svr = Config::gets("Signalisations", "SIP.sipproxy");
		}
	} else {
		svr = Config::gets("Signalisations", "SIP.hostPart");
	}
savoirfairelinux's avatar
savoirfairelinux committed
56 57 58 59 60 61 62 63 64 65 66 67 68 69
}

AudioRtp::~AudioRtp (void) {
}

int 
AudioRtp::createNewSession (SipCall *ca) {
	// Start RTP Send/Receive threads
	ca->enable_audio = 1;
	if (!manager->useStun()) { 
		symetric = false;
	} else {
		symetric = true;
	}
70
	
llea's avatar
llea committed
71 72
#ifdef ALSA
	RTXThread = new AudioRtpRTX (ca, manager->audiodriver, 
73
				manager->audiodriverReadAlsa, manager, symetric);
llea's avatar
llea committed
74 75
#else
	RTXThread = new AudioRtpRTX (ca, manager->audiodriver, NULL, manager, 
76
			symetric);
llea's avatar
llea committed
77
#endif
78
	
llea's avatar
llea committed
79 80 81
	if (RTXThread->start() != 0) {
		return -1;
	}
llea's avatar
llea committed
82
		
savoirfairelinux's avatar
savoirfairelinux committed
83 84 85 86 87 88 89 90 91
	return 0;
}

	
void
AudioRtp::closeRtpSession (SipCall *ca) {
	// This will make RTP threads finish.
	ca->enable_audio = -1;

savoirfairelinux's avatar
savoirfairelinux committed
92
	if (RTXThread != NULL) {
llea's avatar
llea committed
93
		// Wait for them...and delete.
llea's avatar
llea committed
94
		//RTXThread->join();
llea's avatar
llea committed
95
		qDebug("DELETED");
savoirfairelinux's avatar
savoirfairelinux committed
96 97 98 99 100 101 102 103 104 105 106 107
		delete RTXThread;
		RTXThread = NULL;
	}

	// Flush audio read buffer
	manager->audiodriver->resetDevice();
}

////////////////////////////////////////////////////////////////////////////////
// AudioRtpRTX Class                                                          //
////////////////////////////////////////////////////////////////////////////////
AudioRtpRTX::AudioRtpRTX (SipCall *sipcall, AudioDrivers *driver, 
108
		AudioDrivers *read_driver, Manager *mngr, bool sym) {
savoirfairelinux's avatar
savoirfairelinux committed
109
	this->manager = mngr;
110
	this->ca = sipcall;
savoirfairelinux's avatar
savoirfairelinux committed
111
	this->sym =sym;
112
	this->audioDevice = driver;
llea's avatar
llea committed
113 114 115
#ifdef ALSA
	this->audioDeviceRead = read_driver;
#endif
savoirfairelinux's avatar
savoirfairelinux committed
116 117 118 119 120 121 122 123 124 125 126 127 128 129 130

	// TODO: Change bind address according to user settings.
	InetHostAddress local_ip("0.0.0.0");

	if (!sym) {
		sessionRecv = new RTPSession (local_ip, ca->getLocalAudioPort());
		sessionSend = new RTPSession (local_ip);
	} else {
		int forcedPort = manager->getFirewallPort();
		qDebug("Forced port %d", forcedPort);
		session = new SymmetricRTPSession (local_ip, forcedPort);
	}
}

AudioRtpRTX::~AudioRtpRTX () {
llea's avatar
llea committed
131
	this->terminate();
savoirfairelinux's avatar
savoirfairelinux committed
132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154
	if (!sym) {
		if (sessionRecv != NULL) {
			delete sessionRecv;	
			sessionRecv = NULL;
		}
		if (sessionSend != NULL) {
			delete sessionSend;	
			sessionSend = NULL;
		}
	} else {
		if (session != NULL) {
			delete session;
			session = NULL;
		}
	}
}

void
AudioRtpRTX::run (void) {
	AudioCodec 		 ac;
	unsigned char	*data_to_send;
	short			*data_mute;
	short			*data_from_mic;
155
	short			*data_from_mic_tmp;
savoirfairelinux's avatar
savoirfairelinux committed
156 157 158 159 160 161 162 163
	int				 i,
					 compSize, 
					 timestamp;
	int				 expandedSize;
	short			*data_for_speakers = NULL;
	
	data_for_speakers = new short[2048];
	data_from_mic = new short[1024];
164
	data_from_mic_tmp = new short[1024];
savoirfairelinux's avatar
savoirfairelinux committed
165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198
	data_to_send = new unsigned char[1024];
	data_mute = new short[1024];

	InetHostAddress remote_ip(ca->remote_sdp_audio_ip);
	
	if (!remote_ip) {
	   qDebug("RTX: IP address is not correct!");
	   exit();
	} else {
		qDebug("RTX: Connected to %s:%d",
				ca->remote_sdp_audio_ip, ca->remote_sdp_audio_port);
	}
	
	// Initialization
	if (!sym) {
		sessionRecv->setSchedulingTimeout (100000);
		sessionRecv->setExpireTimeout(1000000);
		
		sessionSend->setSchedulingTimeout(10000);
		sessionSend->setExpireTimeout(1000000);
	} else {
		session->setSchedulingTimeout(10000);
		session->setExpireTimeout(1000000);
	}

#if 0 // Necessaire ?
    if (!sessionRecv->addDestination(remote_ip,
				(unsigned short) ca->remote_sdp_audio_port)) {
		qDebug("RTX recv: could not connect to port %d", 
				ca->remote_sdp_audio_port);
		this->exit();
	} else {
		qDebug("RTP(Recv): Added destination %s:%d",
				remote_ip.getHostname(),
llea's avatar
llea committed
199
				(unsigned short) ca->remote_sdp_audio_port);
savoirfairelinux's avatar
savoirfairelinux committed
200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257
	}
#endif

	if (!sym) {
		if (!sessionSend->addDestination (remote_ip, 
					(unsigned short) ca->remote_sdp_audio_port)) {
			qDebug("RTX send: could not connect to port %d", 
					ca->remote_sdp_audio_port);
			this->exit();
		} else {
			qDebug("RTP(Send): Added destination %s:%d",
					remote_ip.getHostname(),
					(unsigned short) ca->remote_sdp_audio_port);
		}

		sessionRecv->setPayloadFormat(StaticPayloadFormat(
				(StaticPayloadType) ca->payload));
		sessionSend->setPayloadFormat(StaticPayloadFormat(
				(StaticPayloadType) ca->payload));
		setCancel(cancelImmediate);
		sessionSend->setMark(true);

	} else {
		if (!session->addDestination (remote_ip, 
					(unsigned short) ca->remote_sdp_audio_port)) {
			qDebug("Symmetric: could not connect to port %d", 
					ca->remote_sdp_audio_port);
			this->exit();
		} else {
			qDebug("Symmetric: Connected to %s:%d",
					remote_ip.getHostname(),
					(unsigned short) ca->remote_sdp_audio_port);

			session->setPayloadFormat(StaticPayloadFormat(
				(StaticPayloadType) ca->payload));
			setCancel(cancelImmediate);
		}
	}
	
	timestamp = 0;

	// TODO: get frameSize from user config 
	int frameSize = 20; // 20ms frames
	TimerPort::setTimer(frameSize);
	
	// start running the packet queue scheduler.
	if (!sym) {
		sessionRecv->startRunning();
		sessionSend->startRunning();	
	} else {
		session->startRunning();
	}
	
	while (ca->enable_audio != -1) {
		////////////////////////////
		// Send session
		////////////////////////////
		if (!manager->mute) {
llea's avatar
llea committed
258 259 260 261 262
#ifdef ALSA
			i = audioDeviceRead->readBuffer (data_from_mic, 320);
#else
			i = audioDevice->readBuffer (data_from_mic, 320);
#endif
savoirfairelinux's avatar
savoirfairelinux committed
263 264 265
		} else {
			// When IP-phone user click on mute button, we read buffer of a
			// temp buffer to avoid delay in sound.
llea's avatar
llea committed
266
#ifdef ALSA
llea's avatar
llea committed
267 268 269 270
			i = audioDeviceRead->readBuffer (data_mute, 320);
#else
			i = audioDevice->readBuffer (data_mute, 320);
#endif
savoirfairelinux's avatar
savoirfairelinux committed
271 272
		}

273 274 275 276
		// TODO : return an error because no sound
		if (i < 0) {
			break;
		}
277
		for (int j = 0; j < i; j++)
llea's avatar
llea committed
278
			data_from_mic_tmp[j] = data_from_mic[j]*manager->getMicVolume()/100;
279

savoirfairelinux's avatar
savoirfairelinux committed
280 281 282 283
		// Encode acquired audio sample
		compSize = AudioCodec::codecEncode (
				ac.handleCodecs[0], 
				data_to_send,
284
				data_from_mic_tmp, i);
savoirfairelinux's avatar
savoirfairelinux committed
285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308 309 310 311 312 313 314 315

		// Send encoded audio sample
		if (!sym) {
			sessionSend->putData(timestamp, data_to_send, compSize);
		} else {
			session->putData(timestamp, data_to_send, compSize);
		}
		timestamp += compSize;

		////////////////////////////
		// Recv session
		////////////////////////////
		const AppDataUnit* adu = NULL;

		do {
			Thread::sleep(5); // in msec.
			if (!sym) {
				adu = sessionRecv->getData(sessionRecv->getFirstTimestamp());
			} else {
				adu = session->getData(session->getFirstTimestamp());
			}
		} while (adu == NULL);

		// Decode data with relevant codec
		expandedSize = AudioCodec::codecDecode (
				adu->getType(),
				data_for_speakers,
				(unsigned char*) adu->getData(),
				adu->getSize());
		
		// Write decoded data to sound device
llea's avatar
llea committed
316 317 318
		audioDevice->audio_buf.resize(expandedSize);
		audioDevice->audio_buf.setData (data_for_speakers, 
				manager->getSpkrVolume());
llea's avatar
llea committed
319
		i = audioDevice->writeBuffer ();
savoirfairelinux's avatar
savoirfairelinux committed
320 321 322 323 324 325 326 327 328 329
		delete adu;


		// Let's wait for the next transmit cycle
		Thread::sleep(TimerPort::getTimer());
		TimerPort::incTimer(frameSize); // 'frameSize' ms
	}
		 
	delete[] data_for_speakers;
	delete[] data_from_mic;
330
	delete[] data_from_mic_tmp;
savoirfairelinux's avatar
savoirfairelinux committed
331 332 333 334 335 336 337
	delete[] data_mute;
	delete[] data_to_send;
	this->exit();
}


// EOF