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/*
* libjingle
* Copyright 2004--2011, Google Inc.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
*
* 1. Redistributions of source code must retain the above copyright notice,
* this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright notice,
* this list of conditions and the following disclaimer in the documentation
* and/or other materials provided with the distribution.
* 3. The name of the author may not be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO
* EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
* OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
* WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
* OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
* ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#include <string>
#include <vector>
#include "talk/base/gunit.h"
#include "talk/p2p/base/constants.h"
#include "talk/session/phone/codec.h"
#include "talk/session/phone/mediasession.h"
#include "talk/session/phone/srtpfilter.h"
#include "talk/session/phone/testutils.h"
#ifdef HAVE_SRTP
#define ASSERT_CRYPTO(cd, r, s, cs) \
ASSERT_EQ(r, cd->crypto_required()); \
ASSERT_EQ(s, cd->cryptos().size()); \
ASSERT_EQ(std::string(cs), cd->cryptos()[0].cipher_suite)
#else
#define ASSERT_CRYPTO(c, r, s, cs) \
ASSERT_EQ(false, cd->crypto_required()); \
ASSERT_EQ(0U, cd->cryptos().size());
#endif
using cricket::MediaSessionDescriptionFactory;
using cricket::MediaSessionOptions;
using cricket::MediaType;
using cricket::SessionDescription;
using cricket::SsrcGroup;
using cricket::StreamParams;
using cricket::StreamParamsVec;
using cricket::ContentInfo;
using cricket::CryptoParamsVec;
using cricket::AudioContentDescription;
using cricket::VideoContentDescription;
using cricket::kAutoBandwidth;
using cricket::AudioCodec;
using cricket::VideoCodec;
using cricket::NS_JINGLE_RTP;
using cricket::MEDIA_TYPE_AUDIO;
using cricket::MEDIA_TYPE_VIDEO;
using cricket::SEC_ENABLED;
using cricket::CS_AES_CM_128_HMAC_SHA1_32;
using cricket::CS_AES_CM_128_HMAC_SHA1_80;
static const AudioCodec kAudioCodecs1[] = {
AudioCodec(103, "ISAC", 16000, -1, 1, 5),
AudioCodec(102, "iLBC", 8000, 13300, 1, 4),
AudioCodec(0, "PCMU", 8000, 64000, 1, 3),
AudioCodec(8, "PCMA", 8000, 64000, 1, 2),
AudioCodec(117, "red", 8000, 0, 1, 1),
};
static const AudioCodec kAudioCodecs2[] = {
AudioCodec(126, "speex", 16000, 22000, 1, 3),
AudioCodec(127, "iLBC", 8000, 13300, 1, 2),
AudioCodec(0, "PCMU", 8000, 64000, 1, 1),
};
static const AudioCodec kAudioCodecsAnswer[] = {
AudioCodec(102, "iLBC", 8000, 13300, 1, 2),
AudioCodec(0, "PCMU", 8000, 64000, 1, 1),
};
static const VideoCodec kVideoCodecs1[] = {
VideoCodec(96, "H264-SVC", 320, 200, 30, 2),
VideoCodec(97, "H264", 320, 200, 30, 1)
};
static const VideoCodec kVideoCodecs2[] = {
VideoCodec(126, "H264", 320, 200, 30, 2),
VideoCodec(127, "H263", 320, 200, 30, 1)
};
static const VideoCodec kVideoCodecsAnswer[] = {
VideoCodec(97, "H264", 320, 200, 30, 2)
};
static const uint32 kSimulcastParamsSsrc[] = {10, 11, 20, 21, 30, 31};
static const uint32 kSimSsrc[] = {10, 20, 30};
static const uint32 kFec1Ssrc[] = {10, 11};
static const uint32 kFec2Ssrc[] = {20, 21};
static const uint32 kFec3Ssrc[] = {30, 31};
static const char kMediaStream1[] = "stream_1";
static const char kMediaStream2[] = "stream_2";
static const char kVideoTrack1[] = "video_1";
static const char kVideoTrack2[] = "video_2";
static const char kAudioTrack1[] = "audio_1";
static const char kAudioTrack2[] = "audio_2";
static const char kAudioTrack3[] = "audio_3";
class MediaSessionDescriptionFactoryTest : public testing::Test {
public:
MediaSessionDescriptionFactoryTest() {
f1_.set_audio_codecs(MAKE_VECTOR(kAudioCodecs1));
f1_.set_video_codecs(MAKE_VECTOR(kVideoCodecs1));
f2_.set_audio_codecs(MAKE_VECTOR(kAudioCodecs2));
f2_.set_video_codecs(MAKE_VECTOR(kVideoCodecs2));
}
// Create a video StreamParamsVec object with:
// - one video stream with 3 simulcast streams and FEC,
StreamParamsVec CreateComplexVideoStreamParamsVec() {
SsrcGroup sim_group("SIM", MAKE_VECTOR(kSimSsrc));
SsrcGroup fec_group1("FEC", MAKE_VECTOR(kFec1Ssrc));
SsrcGroup fec_group2("FEC", MAKE_VECTOR(kFec2Ssrc));
SsrcGroup fec_group3("FEC", MAKE_VECTOR(kFec3Ssrc));
std::vector<SsrcGroup> ssrc_groups;
ssrc_groups.push_back(sim_group);
ssrc_groups.push_back(fec_group1);
ssrc_groups.push_back(fec_group2);
ssrc_groups.push_back(fec_group3);
StreamParams simulcast_params;
simulcast_params.name = kVideoTrack1;
simulcast_params.ssrcs = MAKE_VECTOR(kSimulcastParamsSsrc);
simulcast_params.ssrc_groups = ssrc_groups;
simulcast_params.cname = "Video_SIM_FEC";
simulcast_params.sync_label = kMediaStream1;
StreamParamsVec video_streams;
video_streams.push_back(simulcast_params);
return video_streams;
}
bool CompareCryptoParams(const CryptoParamsVec& c1,
const CryptoParamsVec& c2) {
if (c1.size() != c2.size())
return false;
for (size_t i = 0; i < c1.size(); ++i)
if (c1[i].tag != c2[i].tag || c1[i].cipher_suite != c2[i].cipher_suite ||
c1[i].key_params != c2[i].key_params ||
c1[i].session_params != c2[i].session_params)
return false;
return true;
}
protected:
MediaSessionDescriptionFactory f1_;
MediaSessionDescriptionFactory f2_;
};
// Create a typical audio offer, and ensure it matches what we expect.
TEST_F(MediaSessionDescriptionFactoryTest, TestCreateAudioOffer) {
f1_.set_secure(SEC_ENABLED);
talk_base::scoped_ptr<SessionDescription> offer(
f1_.CreateOffer(MediaSessionOptions(), NULL));
ASSERT_TRUE(offer.get() != NULL);
const ContentInfo* ac = offer->GetContentByName("audio");
const ContentInfo* vc = offer->GetContentByName("video");
ASSERT_TRUE(ac != NULL);
ASSERT_TRUE(vc == NULL);
EXPECT_EQ(std::string(NS_JINGLE_RTP), ac->type);
const AudioContentDescription* acd =
static_cast<const AudioContentDescription*>(ac->description);
EXPECT_EQ(MEDIA_TYPE_AUDIO, acd->type());
EXPECT_EQ(f1_.audio_codecs(), acd->codecs());
EXPECT_NE(0U, acd->first_ssrc()); // a random nonzero ssrc
EXPECT_EQ(kAutoBandwidth, acd->bandwidth()); // default bandwidth (auto)
EXPECT_TRUE(acd->rtcp_mux()); // rtcp-mux defaults on
ASSERT_CRYPTO(acd, false, 2U, CS_AES_CM_128_HMAC_SHA1_32);
}
// Create a typical video offer, and ensure it matches what we expect.
TEST_F(MediaSessionDescriptionFactoryTest, TestCreateVideoOffer) {
MediaSessionOptions opts;
opts.has_video = true;
f1_.set_secure(SEC_ENABLED);
talk_base::scoped_ptr<SessionDescription>
offer(f1_.CreateOffer(opts, NULL));
ASSERT_TRUE(offer.get() != NULL);
const ContentInfo* ac = offer->GetContentByName("audio");
const ContentInfo* vc = offer->GetContentByName("video");
ASSERT_TRUE(ac != NULL);
ASSERT_TRUE(vc != NULL);
EXPECT_EQ(std::string(NS_JINGLE_RTP), ac->type);
EXPECT_EQ(std::string(NS_JINGLE_RTP), vc->type);
const AudioContentDescription* acd =
static_cast<const AudioContentDescription*>(ac->description);
const VideoContentDescription* vcd =
static_cast<const VideoContentDescription*>(vc->description);
EXPECT_EQ(MEDIA_TYPE_AUDIO, acd->type());
EXPECT_EQ(f1_.audio_codecs(), acd->codecs());
EXPECT_NE(0U, acd->first_ssrc()); // a random nonzero ssrc
EXPECT_EQ(kAutoBandwidth, acd->bandwidth()); // default bandwidth (auto)
EXPECT_TRUE(acd->rtcp_mux()); // rtcp-mux defaults on
ASSERT_CRYPTO(acd, false, 2U, CS_AES_CM_128_HMAC_SHA1_32);
EXPECT_EQ(MEDIA_TYPE_VIDEO, vcd->type());
EXPECT_EQ(f1_.video_codecs(), vcd->codecs());
EXPECT_NE(0U, vcd->first_ssrc()); // a random nonzero ssrc
EXPECT_EQ(kAutoBandwidth, vcd->bandwidth()); // default bandwidth (auto)
EXPECT_TRUE(vcd->rtcp_mux()); // rtcp-mux defaults on
ASSERT_CRYPTO(vcd, false, 1U, CS_AES_CM_128_HMAC_SHA1_80);
}
// Create a typical audio answer, and ensure it matches what we expect.
TEST_F(MediaSessionDescriptionFactoryTest, TestCreateAudioAnswer) {
f1_.set_secure(SEC_ENABLED);
f2_.set_secure(SEC_ENABLED);
talk_base::scoped_ptr<SessionDescription> offer(
f1_.CreateOffer(MediaSessionOptions(), NULL));
ASSERT_TRUE(offer.get() != NULL);
talk_base::scoped_ptr<SessionDescription> answer(
f2_.CreateAnswer(offer.get(), MediaSessionOptions(), NULL));
const ContentInfo* ac = answer->GetContentByName("audio");
const ContentInfo* vc = answer->GetContentByName("video");
ASSERT_TRUE(ac != NULL);
ASSERT_TRUE(vc == NULL);
EXPECT_EQ(std::string(NS_JINGLE_RTP), ac->type);
const AudioContentDescription* acd =
static_cast<const AudioContentDescription*>(ac->description);
EXPECT_EQ(MEDIA_TYPE_AUDIO, acd->type());
EXPECT_EQ(MAKE_VECTOR(kAudioCodecsAnswer), acd->codecs());
EXPECT_NE(0U, acd->first_ssrc()); // a random nonzero ssrc
EXPECT_EQ(kAutoBandwidth, acd->bandwidth()); // negotiated auto bw
EXPECT_TRUE(acd->rtcp_mux()); // negotiated rtcp-mux
ASSERT_CRYPTO(acd, false, 1U, CS_AES_CM_128_HMAC_SHA1_32);
}
// Create a typical video answer, and ensure it matches what we expect.
TEST_F(MediaSessionDescriptionFactoryTest, TestCreateVideoAnswer) {
MediaSessionOptions opts;
opts.has_video = true;
f1_.set_secure(SEC_ENABLED);
f2_.set_secure(SEC_ENABLED);
talk_base::scoped_ptr<SessionDescription> offer(f1_.CreateOffer(opts, NULL));
ASSERT_TRUE(offer.get() != NULL);
talk_base::scoped_ptr<SessionDescription> answer(
f2_.CreateAnswer(offer.get(), opts, NULL));
const ContentInfo* ac = answer->GetContentByName("audio");
const ContentInfo* vc = answer->GetContentByName("video");
ASSERT_TRUE(ac != NULL);
ASSERT_TRUE(vc != NULL);
EXPECT_EQ(std::string(NS_JINGLE_RTP), ac->type);
EXPECT_EQ(std::string(NS_JINGLE_RTP), vc->type);
const AudioContentDescription* acd =
static_cast<const AudioContentDescription*>(ac->description);
const VideoContentDescription* vcd =
static_cast<const VideoContentDescription*>(vc->description);
EXPECT_EQ(MEDIA_TYPE_AUDIO, acd->type());
EXPECT_EQ(MAKE_VECTOR(kAudioCodecsAnswer), acd->codecs());
EXPECT_EQ(kAutoBandwidth, acd->bandwidth()); // negotiated auto bw
EXPECT_NE(0U, acd->first_ssrc()); // a random nonzero ssrc
EXPECT_TRUE(acd->rtcp_mux()); // negotiated rtcp-mux
ASSERT_CRYPTO(acd, false, 1U, CS_AES_CM_128_HMAC_SHA1_32);
EXPECT_EQ(MEDIA_TYPE_VIDEO, vcd->type());
EXPECT_EQ(MAKE_VECTOR(kVideoCodecsAnswer), vcd->codecs());
EXPECT_NE(0U, vcd->first_ssrc()); // a random nonzero ssrc
EXPECT_TRUE(vcd->rtcp_mux()); // negotiated rtcp-mux
ASSERT_CRYPTO(vcd, false, 1U, CS_AES_CM_128_HMAC_SHA1_80);
}
// Create an audio-only answer to a video offer.
TEST_F(MediaSessionDescriptionFactoryTest, TestCreateAudioAnswerToVideo) {
MediaSessionOptions opts;
opts.has_video = true;
talk_base::scoped_ptr<SessionDescription>
offer(f1_.CreateOffer(opts, NULL));
ASSERT_TRUE(offer.get() != NULL);
talk_base::scoped_ptr<SessionDescription> answer(
f2_.CreateAnswer(offer.get(), MediaSessionOptions(), NULL));
const ContentInfo* ac = answer->GetContentByName("audio");
const ContentInfo* vc = answer->GetContentByName("video");
ASSERT_TRUE(ac != NULL);
ASSERT_TRUE(vc == NULL);
}
// Create an audio and video offer with:
// - one video track,
// - two audio tracks.
// and ensure it matches what we expect. Also updates the initial offer by
// adding a new video track and replaces one of the audio tracks.
TEST_F(MediaSessionDescriptionFactoryTest, TestCreateMultiStreamVideoOffer) {
MediaSessionOptions opts;
opts.AddStream(MEDIA_TYPE_VIDEO, kVideoTrack1, kMediaStream1);
opts.AddStream(MEDIA_TYPE_AUDIO, kAudioTrack1, kMediaStream1);
opts.AddStream(MEDIA_TYPE_AUDIO, kAudioTrack2, kMediaStream1);
f1_.set_secure(SEC_ENABLED);
talk_base::scoped_ptr<SessionDescription> offer(f1_.CreateOffer(opts, NULL));
ASSERT_TRUE(offer.get() != NULL);
const ContentInfo* ac = offer->GetContentByName("audio");
const ContentInfo* vc = offer->GetContentByName("video");
ASSERT_TRUE(ac != NULL);
ASSERT_TRUE(vc != NULL);
const AudioContentDescription* acd =
static_cast<const AudioContentDescription*>(ac->description);
const VideoContentDescription* vcd =
static_cast<const VideoContentDescription*>(vc->description);
EXPECT_EQ(MEDIA_TYPE_AUDIO, acd->type());
EXPECT_EQ(f1_.audio_codecs(), acd->codecs());
const StreamParamsVec& audio_streams = acd->streams();
ASSERT_EQ(2U, audio_streams.size());
EXPECT_EQ(audio_streams[0].cname , audio_streams[1].cname);
EXPECT_EQ(kAudioTrack1, audio_streams[0].name);
ASSERT_EQ(1U, audio_streams[0].ssrcs.size());
EXPECT_NE(0U, audio_streams[0].ssrcs[0]);
EXPECT_EQ(kAudioTrack2, audio_streams[1].name);
ASSERT_EQ(1U, audio_streams[1].ssrcs.size());
EXPECT_NE(0U, audio_streams[1].ssrcs[0]);
EXPECT_EQ(kAutoBandwidth, acd->bandwidth()); // default bandwidth (auto)
EXPECT_TRUE(acd->rtcp_mux()); // rtcp-mux defaults on
ASSERT_CRYPTO(acd, false, 2U, CS_AES_CM_128_HMAC_SHA1_32);
EXPECT_EQ(MEDIA_TYPE_VIDEO, vcd->type());
EXPECT_EQ(f1_.video_codecs(), vcd->codecs());
ASSERT_CRYPTO(vcd, false, 1U, CS_AES_CM_128_HMAC_SHA1_80);
const StreamParamsVec& video_streams = vcd->streams();
ASSERT_EQ(1U, video_streams.size());
EXPECT_EQ(video_streams[0].cname, audio_streams[0].cname);
EXPECT_EQ(kVideoTrack1, video_streams[0].name);
EXPECT_EQ(kAutoBandwidth, vcd->bandwidth()); // default bandwidth (auto)
EXPECT_TRUE(vcd->rtcp_mux()); // rtcp-mux defaults on
// Update the offer. Add a new video track that is not synched to the
// other tracks and replace audio track 2 with audio track 3.
opts.AddStream(MEDIA_TYPE_VIDEO, kVideoTrack2, kMediaStream2);
opts.RemoveStream(MEDIA_TYPE_AUDIO, kAudioTrack2);
opts.AddStream(MEDIA_TYPE_AUDIO, kAudioTrack3, kMediaStream1);
talk_base::scoped_ptr<SessionDescription>
updated_offer(f1_.CreateOffer(opts, offer.get()));
ASSERT_TRUE(updated_offer.get() != NULL);
ac = updated_offer->GetContentByName("audio");
vc = updated_offer->GetContentByName("video");
ASSERT_TRUE(ac != NULL);
ASSERT_TRUE(vc != NULL);
const AudioContentDescription* updated_acd =
static_cast<const AudioContentDescription*>(ac->description);
const VideoContentDescription* updated_vcd =
static_cast<const VideoContentDescription*>(vc->description);
EXPECT_EQ(acd->type(), updated_acd->type());
EXPECT_EQ(acd->codecs(), updated_acd->codecs());
EXPECT_EQ(vcd->type(), updated_vcd->type());
EXPECT_EQ(vcd->codecs(), updated_vcd->codecs());
ASSERT_CRYPTO(updated_acd, false, 2U, CS_AES_CM_128_HMAC_SHA1_32);
EXPECT_TRUE(CompareCryptoParams(acd->cryptos(), updated_acd->cryptos()));
ASSERT_CRYPTO(updated_vcd, false, 1U, CS_AES_CM_128_HMAC_SHA1_80);
EXPECT_TRUE(CompareCryptoParams(vcd->cryptos(), updated_vcd->cryptos()));
const StreamParamsVec& updated_audio_streams = updated_acd->streams();
ASSERT_EQ(2U, updated_audio_streams.size());
EXPECT_EQ(audio_streams[0], updated_audio_streams[0]);
EXPECT_EQ(kAudioTrack3, updated_audio_streams[1].name); // New audio track.
ASSERT_EQ(1U, updated_audio_streams[1].ssrcs.size());
EXPECT_NE(0U, updated_audio_streams[1].ssrcs[0]);
EXPECT_EQ(updated_audio_streams[0].cname, updated_audio_streams[1].cname);
const StreamParamsVec& updated_video_streams = updated_vcd->streams();
ASSERT_EQ(2U, updated_video_streams.size());
EXPECT_EQ(video_streams[0], updated_video_streams[0]);
EXPECT_EQ(kVideoTrack2, updated_video_streams[1].name);
EXPECT_NE(updated_video_streams[1].cname, updated_video_streams[0].cname);
}
// Create an audio and video answer to a standard video offer with:
// - one video track,
// - two audio tracks.
// and ensure it matches what we expect. Also updates the initial answer by
// adding a new video track and removes one of the audio tracks.
TEST_F(MediaSessionDescriptionFactoryTest, TestCreateMultiStreamVideoAnswer) {
MediaSessionOptions offer_opts;
offer_opts.has_video = true;
f1_.set_secure(SEC_ENABLED);
f2_.set_secure(SEC_ENABLED);
talk_base::scoped_ptr<SessionDescription> offer(f1_.CreateOffer(offer_opts,
NULL));
MediaSessionOptions opts;
opts.AddStream(MEDIA_TYPE_VIDEO, kVideoTrack1, kMediaStream1);
opts.AddStream(MEDIA_TYPE_AUDIO, kAudioTrack1, kMediaStream1);
opts.AddStream(MEDIA_TYPE_AUDIO, kAudioTrack2, kMediaStream1);
talk_base::scoped_ptr<SessionDescription>
answer(f2_.CreateAnswer(offer.get(), opts, NULL));
ASSERT_TRUE(answer.get() != NULL);
const ContentInfo* ac = answer->GetContentByName("audio");
const ContentInfo* vc = answer->GetContentByName("video");
ASSERT_TRUE(ac != NULL);
ASSERT_TRUE(vc != NULL);
const AudioContentDescription* acd =
static_cast<const AudioContentDescription*>(ac->description);
const VideoContentDescription* vcd =
static_cast<const VideoContentDescription*>(vc->description);
EXPECT_EQ(MEDIA_TYPE_AUDIO, acd->type());
EXPECT_EQ(MAKE_VECTOR(kAudioCodecsAnswer), acd->codecs());
ASSERT_CRYPTO(acd, false, 1U, CS_AES_CM_128_HMAC_SHA1_32);
ASSERT_CRYPTO(vcd, false, 1U, CS_AES_CM_128_HMAC_SHA1_80);
const StreamParamsVec& audio_streams = acd->streams();
ASSERT_EQ(2U, audio_streams.size());
EXPECT_TRUE(audio_streams[0].cname == audio_streams[1].cname);
EXPECT_EQ(kAudioTrack1, audio_streams[0].name);
ASSERT_EQ(1U, audio_streams[0].ssrcs.size());
EXPECT_NE(0U, audio_streams[0].ssrcs[0]);
EXPECT_EQ(kAudioTrack2, audio_streams[1].name);
ASSERT_EQ(1U, audio_streams[1].ssrcs.size());
EXPECT_NE(0U, audio_streams[1].ssrcs[0]);
EXPECT_EQ(kAutoBandwidth, acd->bandwidth()); // default bandwidth (auto)
EXPECT_TRUE(acd->rtcp_mux()); // rtcp-mux defaults on
EXPECT_EQ(MEDIA_TYPE_VIDEO, vcd->type());
EXPECT_EQ(MAKE_VECTOR(kVideoCodecsAnswer), vcd->codecs());
const StreamParamsVec& video_streams = vcd->streams();
ASSERT_EQ(1U, video_streams.size());
EXPECT_EQ(video_streams[0].cname, audio_streams[0].cname);
EXPECT_EQ(kVideoTrack1, video_streams[0].name);
EXPECT_EQ(kAutoBandwidth, vcd->bandwidth()); // default bandwidth (auto)
EXPECT_TRUE(vcd->rtcp_mux()); // rtcp-mux defaults on
// Update the answer. Add a new video track that is not synched to the
// other traacks and remove 1 audio track.
opts.AddStream(MEDIA_TYPE_VIDEO, kVideoTrack2, kMediaStream2);
opts.RemoveStream(MEDIA_TYPE_AUDIO, kAudioTrack2);
talk_base::scoped_ptr<SessionDescription>
updated_answer(f2_.CreateAnswer(offer.get(), opts, answer.get()));
ASSERT_TRUE(updated_answer.get() != NULL);
ac = updated_answer->GetContentByName("audio");
vc = updated_answer->GetContentByName("video");
ASSERT_TRUE(ac != NULL);
ASSERT_TRUE(vc != NULL);
const AudioContentDescription* updated_acd =
static_cast<const AudioContentDescription*>(ac->description);
const VideoContentDescription* updated_vcd =
static_cast<const VideoContentDescription*>(vc->description);
ASSERT_CRYPTO(updated_acd, false, 1U, CS_AES_CM_128_HMAC_SHA1_32);
EXPECT_TRUE(CompareCryptoParams(acd->cryptos(), updated_acd->cryptos()));
ASSERT_CRYPTO(updated_vcd, false, 1U, CS_AES_CM_128_HMAC_SHA1_80);
EXPECT_TRUE(CompareCryptoParams(vcd->cryptos(), updated_vcd->cryptos()));
EXPECT_EQ(acd->type(), updated_acd->type());
EXPECT_EQ(acd->codecs(), updated_acd->codecs());
EXPECT_EQ(vcd->type(), updated_vcd->type());
EXPECT_EQ(vcd->codecs(), updated_vcd->codecs());
const StreamParamsVec& updated_audio_streams = updated_acd->streams();
ASSERT_EQ(1U, updated_audio_streams.size());
EXPECT_TRUE(audio_streams[0] == updated_audio_streams[0]);
const StreamParamsVec& updated_video_streams = updated_vcd->streams();
ASSERT_EQ(2U, updated_video_streams.size());
EXPECT_EQ(video_streams[0], updated_video_streams[0]);
EXPECT_EQ(kVideoTrack2, updated_video_streams[1].name);
EXPECT_NE(updated_video_streams[1].cname, updated_video_streams[0].cname);
}