conference: allow rendez-vous without device

Add a parameter to dring.yml file, the video mixer resolution
is set from this parameter (not from videoInput anymore)

Change-Id: I57e2545e8794726a04c093388dee63aeea4b399d
GitLab: #265

src/media/video/video_mixer.cpp

@@ -114,6 +114,11 @@ VideoMixer::switchInput(const std::string& input)
         videoLocal_ = getVideoCamera();
     }
 
+    if (input.empty()) {
+        JAMI_DBG("Input is empty, don't add it in the mixer");
+        return;
+    }
+
     // Re-attach videoInput to mixer
     if (videoLocal_) {
         if (auto localInput = std::dynamic_pointer_cast<VideoInput>(videoLocal_)) {

src/media/video/video_rtp_session.cpp

@@ -145,8 +145,17 @@ VideoRtpSession::startSender()
         try {
             sender_.reset();
             socketPair_->stopSendOp(false);
+            MediaStream ms = !conference_ ?
+                        MediaStream("video sender",
+                            AV_PIX_FMT_YUV420P,
+                            1 / static_cast<rational<int>>(localVideoParams_.framerate),
+                            localVideoParams_.width,
+                            localVideoParams_.height,
+                            send_.bitrate,
+                            static_cast<rational<int>>(localVideoParams_.framerate)) :
+                        conference_->getVideoMixer()->getStream("Video Sender");
             sender_.reset(new VideoSender(getRemoteRtpUri(),
-                                          localVideoParams_,
+                                        ms,
                                         send_,
                                         *socketPair_,
                                         initSeqVal_ + 1,
@@ -340,12 +349,17 @@ VideoRtpSession::enterConference(Conference* conference)
     // TODO is this correct? The video Mixer should be enabled for a detached conference even if we
     // are not sending values
     videoMixer_ = conference->getVideoMixer();
+    auto conf_res = split_string_to_unsigned(jami::Manager::instance().videoPreferences.getConferenceResolution(), 'x');
+    if (conf_res.size() != 2 or conf_res[0] <= 0 or conf_res[1] <= 0) {
+        JAMI_ERR("Conference resolution is invalid");
+        return;
+    }
 #if defined(__APPLE__) && TARGET_OS_MAC
-    videoMixer_->setParameters(localVideoParams_.width,
-                               localVideoParams_.height,
-                               av_get_pix_fmt(localVideoParams_.pixel_format.c_str()));
+    videoMixer_->setParameters(conf_res[0],
+                               conf_res[1],
+                               AV_PIX_FMT_NV12);
 #else
-    videoMixer_->setParameters(localVideoParams_.width, localVideoParams_.height);
+    videoMixer_->setParameters(conf_res[0], conf_res[1]);
 #endif
     if (send_.enabled or receiveThread_) {
         setupConferenceVideoPipeline(*conference_);

src/media/video/video_sender.cpp

@@ -43,7 +43,7 @@ namespace video {
 using std::string;
 
 VideoSender::VideoSender(const std::string& dest,
-                         const DeviceParams& dev,
+                         const MediaStream& opts,
                          const MediaDescription& args,
                          SocketPair& socketPair,
                          const uint16_t seqVal,
@@ -51,15 +51,8 @@ VideoSender::VideoSender(const std::string& dest,
     : muxContext_(socketPair.createIOContext(mtu))
     , videoEncoder_(new MediaEncoder)
 {
-    keyFrameFreq_ = dev.framerate.numerator() * KEY_FRAME_PERIOD;
+    keyFrameFreq_ = opts.frameRate.numerator() * KEY_FRAME_PERIOD;
     videoEncoder_->openOutput(dest, "rtp");
-    auto opts = MediaStream("video sender",
-                            AV_PIX_FMT_YUV420P,
-                            1 / (rational<int>) dev.framerate,
-                            dev.width,
-                            dev.height,
-                            args.bitrate,
-                            (rational<int>) dev.framerate);
     videoEncoder_->setOptions(opts);
     videoEncoder_->setOptions(args);
     videoEncoder_->addStream(args.codec->systemCodecInfo);
@@ -70,7 +63,7 @@ VideoSender::VideoSender(const std::string& dest,
     Smartools::getInstance().setLocalVideoCodec(videoEncoder_->getVideoCodec());
 
     // Send the resolution in smartInfo
-    Smartools::getInstance().setResolution("local", dev.width, dev.height);
+    Smartools::getInstance().setResolution("local", opts.width, opts.height);
 }
 
 VideoSender::~VideoSender()

src/media/video/video_sender.h

@@ -44,7 +44,7 @@ class VideoSender : public VideoFramePassiveReader
 {
 public:
     VideoSender(const std::string& dest,
-                const DeviceParams& dev,
+                const MediaStream& opts,
                 const MediaDescription& args,
                 SocketPair& socketPair,
                 const uint16_t seqVal,

src/preferences.cpp

@@ -78,6 +78,7 @@ using yaml_utils::parseValue;
 constexpr const char* const Preferences::CONFIG_LABEL;
 const char* const Preferences::DFT_ZONE = "North America";
 const char* const Preferences::REGISTRATION_EXPIRE_KEY = "registrationexpire";
+constexpr std::string_view DEFAULT_CONFERENCE_RESOLUTION {"1280x720"};
 
 // general preferences
 static constexpr const char* ORDER_KEY {"order"};
@@ -136,6 +137,7 @@ static constexpr const char* DECODING_ACCELERATED_KEY {"decodingAccelerated"};
 static constexpr const char* ENCODING_ACCELERATED_KEY {"encodingAccelerated"};
 static constexpr const char* RECORD_PREVIEW_KEY {"recordPreview"};
 static constexpr const char* RECORD_QUALITY_KEY {"recordQuality"};
+static constexpr const char* CONFERENCE_RESOLUTION_KEY {"conferenceResolution"};
 #endif
 
 #ifdef ENABLE_PLUGIN
@@ -561,6 +563,7 @@ VideoPreferences::VideoPreferences()
     , encodingAccelerated_(false)
     , recordPreview_(true)
     , recordQuality_(0)
+    , conferenceResolution_(DEFAULT_CONFERENCE_RESOLUTION)
 {}
 
 void
@@ -573,6 +576,7 @@ VideoPreferences::serialize(YAML::Emitter& out) const
     out << YAML::Key << DECODING_ACCELERATED_KEY << YAML::Value << decodingAccelerated_;
     out << YAML::Key << ENCODING_ACCELERATED_KEY << YAML::Value << encodingAccelerated_;
 #endif
+    out << YAML::Key << CONFERENCE_RESOLUTION_KEY << YAML::Value << conferenceResolution_;
     getVideoDeviceMonitor().serialize(out);
     out << YAML::EndMap;
 }
@@ -598,6 +602,11 @@ VideoPreferences::unserialize(const YAML::Node& in)
         encodingAccelerated_ = false;
     }
 #endif
+    try {
+        parseValue(node, CONFERENCE_RESOLUTION_KEY, conferenceResolution_);
+    } catch (...) {
+        conferenceResolution_ = DEFAULT_CONFERENCE_RESOLUTION;
+    }
     getVideoDeviceMonitor().unserialize(in);
 }
 #endif // ENABLE_VIDEO

src/preferences.h

@@ -339,11 +339,16 @@ public:
 
     void setRecordQuality(int rec) { recordQuality_ = rec; }
 
+    const std::string& getConferenceResolution() const { return conferenceResolution_; }
+
+    void setConferenceResolution(const std::string& res) { conferenceResolution_ = res; }
+
 private:
     bool decodingAccelerated_;
     bool encodingAccelerated_;
     bool recordPreview_;
     int recordQuality_;
+    std::string conferenceResolution_;
     constexpr static const char* const CONFIG_LABEL = "video";
 };
 #endif // ENABLE_VIDEO