LCOV - code coverage report
Current view: top level - foo/src/media/video - video_receive_thread.cpp (source / functions) Hit Total Coverage
Test: jami-coverage-filtered.info Lines: 121 168 72.0 %
Date: 2026-04-22 10:25:21 Functions: 21 32 65.6 %

          Line data    Source code
       1             : /*
       2             :  *  Copyright (C) 2004-2026 Savoir-faire Linux Inc.
       3             :  *
       4             :  *  This program is free software: you can redistribute it and/or modify
       5             :  *  it under the terms of the GNU General Public License as published by
       6             :  *  the Free Software Foundation, either version 3 of the License, or
       7             :  *  (at your option) any later version.
       8             :  *
       9             :  *  This program is distributed in the hope that it will be useful,
      10             :  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
      11             :  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
      12             :  *  GNU General Public License for more details.
      13             :  *
      14             :  *  You should have received a copy of the GNU General Public License
      15             :  *  along with this program. If not, see <https://www.gnu.org/licenses/>.
      16             :  */
      17             : 
      18             : #include "libav_deps.h" // MUST BE INCLUDED FIRST
      19             : #include "video_receive_thread.h"
      20             : #include "media/media_decoder.h"
      21             : #include "socket_pair.h"
      22             : #include "manager.h"
      23             : #include "logger.h"
      24             : 
      25             : extern "C" {
      26             : #include <libavutil/display.h>
      27             : }
      28             : 
      29             : #include <unistd.h>
      30             : 
      31             : namespace jami {
      32             : namespace video {
      33             : 
      34             : using std::string;
      35             : 
      36          44 : VideoReceiveThread::VideoReceiveThread(const std::string& id, bool useSink, const std::string& sdp, uint16_t mtu)
      37             :     : VideoGenerator::VideoGenerator()
      38          44 :     , args_()
      39          44 :     , id_(id)
      40          44 :     , useSink_(useSink)
      41          44 :     , stream_(sdp)
      42          44 :     , sdpContext_(stream_.str().size(), false, &readFunction, 0, 0, this)
      43          44 :     , sink_ {Manager::instance().createSinkClient(id)}
      44          44 :     , mtu_(mtu)
      45          88 :     , loop_(std::bind(&VideoReceiveThread::setup, this),
      46          88 :             std::bind(&VideoReceiveThread::decodeFrame, this),
      47         176 :             std::bind(&VideoReceiveThread::cleanup, this))
      48             : {
      49          44 :     JAMI_DBG("[%p] Instance created", this);
      50          44 : }
      51             : 
      52         132 : VideoReceiveThread::~VideoReceiveThread()
      53             : {
      54          44 :     loop_.join();
      55          44 :     JAMI_DBG("[%p] Instance destroyed", this);
      56          88 : }
      57             : 
      58             : void
      59          44 : VideoReceiveThread::startLoop()
      60             : {
      61          44 :     JAMI_DBG("[%p] Starting receiver’s loop", this);
      62          44 :     loop_.start();
      63          44 : }
      64             : 
      65             : void
      66          90 : VideoReceiveThread::stopLoop()
      67             : {
      68          90 :     if (loop_.isStopping())
      69          46 :         return;
      70          44 :     JAMI_DBG("[%p] Stopping receiver’s loop and waiting for the thread to exit…", this);
      71          44 :     loop_.stop();
      72          44 :     loop_.join();
      73          44 :     JAMI_DBG("[%p] Receiver’s thread exited", this);
      74             : }
      75             : 
      76             : // We do this setup here instead of the constructor because we don't want the
      77             : // main thread to block while this executes, so it happens in the video thread.
      78             : bool
      79          44 : VideoReceiveThread::setup()
      80             : {
      81          44 :     JAMI_DBG("[%p] Setting up video receiver", this);
      82             : 
      83          88 :     videoDecoder_.reset(new MediaDecoder([this](const std::shared_ptr<MediaFrame>& frame) mutable {
      84           0 :         libav_utils::AVBufferPtr displayMatrix;
      85             :         {
      86           0 :             std::lock_guard l(rotationMtx_);
      87           0 :             if (displayMatrix_)
      88           0 :                 displayMatrix.reset(av_buffer_ref(displayMatrix_.get()));
      89           0 :         }
      90           0 :         if (displayMatrix)
      91           0 :             av_frame_new_side_data_from_buf(frame->pointer(), AV_FRAME_DATA_DISPLAYMATRIX, displayMatrix.release());
      92           0 :         publishFrame(std::static_pointer_cast<VideoFrame>(frame));
      93          44 :     }));
      94          44 :     videoDecoder_->setContextCallback([this]() {
      95           0 :         if (recorderCallback_)
      96           0 :             recorderCallback_(getInfo());
      97           0 :     });
      98          44 :     videoDecoder_->setResolutionChangedCallback([this](int width, int height) {
      99           0 :         dstWidth_ = width;
     100           0 :         dstHeight_ = height;
     101           0 :         sink_->setFrameSize(dstWidth_, dstHeight_);
     102           0 :     });
     103             : 
     104          44 :     dstWidth_ = static_cast<int>(args_.width);
     105          44 :     dstHeight_ = static_cast<int>(args_.height);
     106             : 
     107          44 :     static const std::string SDP_FILENAME = "dummyFilename";
     108          44 :     if (args_.input.empty()) {
     109          44 :         args_.format = "sdp";
     110          44 :         args_.input = SDP_FILENAME;
     111           0 :     } else if (args_.input.substr(0, strlen("/dev/video")) == "/dev/video") {
     112             :         // it's a v4l device if starting with /dev/video
     113             :         // FIXME: This is not a robust way of checking if we mean to use a
     114             :         // v4l2 device
     115           0 :         args_.format = "video4linux2";
     116             :     }
     117             : 
     118          44 :     videoDecoder_->setInterruptCallback(interruptCb, this);
     119             : 
     120          44 :     if (args_.input == SDP_FILENAME) {
     121             :         // Force custom_io so the SDP demuxer will not open any UDP connections
     122             :         // We need it to use ICE transport.
     123          44 :         args_.sdp_flags = "custom_io";
     124             : 
     125          44 :         if (stream_.str().empty()) {
     126           0 :             JAMI_ERR("No SDP loaded");
     127           0 :             return false;
     128             :         }
     129             : 
     130          44 :         videoDecoder_->setIOContext(&sdpContext_);
     131             :     }
     132             : 
     133          44 :     args_.disable_dts_probe_delay = true;
     134             : 
     135          44 :     if (videoDecoder_->openInput(args_)) {
     136           0 :         JAMI_ERR("Unable to open input \"%s\"", args_.input.c_str());
     137           0 :         return false;
     138             :     }
     139             : 
     140          44 :     videoDecoder_->setKeyFrameRequestCb(keyFrameRequestCallback_);
     141             : 
     142          44 :     if (args_.input == SDP_FILENAME) {
     143             :         // Now replace our custom AVIOContext with one that will read packets
     144          44 :         videoDecoder_->setIOContext(demuxContext_.get());
     145             :     }
     146          44 :     return true;
     147             : }
     148             : 
     149             : void
     150          44 : VideoReceiveThread::cleanup()
     151             : {
     152          44 :     JAMI_DBG("[%p] Stopping receiver", this);
     153             : 
     154          44 :     detach(sink_.get());
     155          44 :     sink_->stop();
     156             : 
     157          44 :     videoDecoder_.reset();
     158          44 : }
     159             : 
     160             : // This callback is used by libav internally to break out of blocking calls
     161             : int
     162          45 : VideoReceiveThread::interruptCb(void* data)
     163             : {
     164          45 :     auto* const context = static_cast<VideoReceiveThread*>(data);
     165          45 :     return not context->loop_.isRunning();
     166             : }
     167             : 
     168             : int
     169         176 : VideoReceiveThread::readFunction(void* opaque, uint8_t* buf, int buf_size)
     170             : {
     171         176 :     std::istream& is = static_cast<VideoReceiveThread*>(opaque)->stream_;
     172         176 :     is.read(reinterpret_cast<char*>(buf), buf_size);
     173             : 
     174         176 :     auto count = is.gcount();
     175         176 :     if (count != 0)
     176          44 :         return static_cast<int>(count);
     177             :     else
     178         132 :         return AVERROR_EOF;
     179             : }
     180             : 
     181             : void
     182          44 : VideoReceiveThread::addIOContext(SocketPair& socketPair)
     183             : {
     184          44 :     demuxContext_.reset(socketPair.createIOContext(mtu_));
     185          44 : }
     186             : 
     187             : void
     188          44 : VideoReceiveThread::setRecorderCallback(const std::function<void(const MediaStream& ms)>& cb)
     189             : {
     190          44 :     recorderCallback_ = cb;
     191          44 :     if (videoDecoder_)
     192           0 :         videoDecoder_->setContextCallback([this]() {
     193           0 :             if (recorderCallback_)
     194           0 :                 recorderCallback_(getInfo());
     195           0 :         });
     196          44 : }
     197             : 
     198             : void
     199          47 : VideoReceiveThread::decodeFrame()
     200             : {
     201          47 :     if (not loop_.isRunning())
     202           0 :         return;
     203             : 
     204          47 :     if (not isVideoConfigured_) {
     205          44 :         if (!configureVideoOutput()) {
     206           0 :             JAMI_ERROR("[{:p}] Failed to configure video output", fmt::ptr(this));
     207           0 :             return;
     208             :         } else {
     209         176 :             JAMI_LOG("[{:p}] Decoder configured, starting decoding", fmt::ptr(this));
     210             :         }
     211             :     }
     212          47 :     auto status = videoDecoder_->decode();
     213          47 :     if (status == MediaDemuxer::Status::EndOfFile) {
     214         172 :         JAMI_LOG("[{:p}] End of file", fmt::ptr(this));
     215          43 :         loop_.stop();
     216           4 :     } else if (status == MediaDemuxer::Status::ReadError) {
     217           0 :         JAMI_ERROR("[{:p}] Decoding error: %s", fmt::ptr(this), MediaDemuxer::getStatusStr(status));
     218           4 :     } else if (status == MediaDemuxer::Status::FallBack) {
     219           0 :         if (keyFrameRequestCallback_)
     220           0 :             keyFrameRequestCallback_();
     221             :     }
     222             : }
     223             : 
     224             : bool
     225          44 : VideoReceiveThread::configureVideoOutput()
     226             : {
     227          44 :     assert(not isVideoConfigured_);
     228             : 
     229          44 :     JAMI_DBG("[%p] Configuring video output", this);
     230             : 
     231          44 :     if (not loop_.isRunning()) {
     232           0 :         JAMI_WARN("[%p] Unable to configure video output, the loop is not running!", this);
     233           0 :         return false;
     234             :     }
     235             : 
     236          44 :     if (videoDecoder_->setupVideo() < 0) {
     237           0 :         JAMI_ERR("Decoder IO startup failed");
     238           0 :         stopLoop();
     239           0 :         return false;
     240             :     }
     241             : 
     242             :     // Default size from input video
     243          44 :     if (dstWidth_ == 0 and dstHeight_ == 0) {
     244          44 :         dstWidth_ = videoDecoder_->getWidth();
     245          44 :         dstHeight_ = videoDecoder_->getHeight();
     246             :     }
     247             : 
     248          44 :     if (not sink_->start()) {
     249           0 :         JAMI_ERR("RX: sink startup failed");
     250           0 :         stopLoop();
     251           0 :         return false;
     252             :     }
     253             : 
     254          44 :     if (useSink_)
     255          43 :         startSink();
     256             : 
     257          44 :     if (onSuccessfulSetup_)
     258          44 :         onSuccessfulSetup_(MEDIA_VIDEO, 1);
     259             : 
     260          44 :     return isVideoConfigured_ = true;
     261             : }
     262             : 
     263             : void
     264          91 : VideoReceiveThread::stopSink()
     265             : {
     266          91 :     JAMI_DBG("[%p] Stopping sink", this);
     267             : 
     268          91 :     if (!loop_.isRunning())
     269          90 :         return;
     270             : 
     271           1 :     detach(sink_.get());
     272           1 :     sink_->setFrameSize(0, 0);
     273             : }
     274             : 
     275             : void
     276          44 : VideoReceiveThread::startSink()
     277             : {
     278          44 :     JAMI_DBG("[%p] Starting sink", this);
     279             : 
     280          44 :     if (!loop_.isRunning())
     281          42 :         return;
     282             : 
     283           2 :     if (dstWidth_ > 0 and dstHeight_ > 0 and attach(sink_.get()))
     284           1 :         sink_->setFrameSize(dstWidth_, dstHeight_);
     285             : }
     286             : 
     287             : int
     288           0 : VideoReceiveThread::getWidth() const
     289             : {
     290           0 :     return dstWidth_;
     291             : }
     292             : 
     293             : int
     294           0 : VideoReceiveThread::getHeight() const
     295             : {
     296           0 :     return dstHeight_;
     297             : }
     298             : 
     299             : AVPixelFormat
     300           0 : VideoReceiveThread::getPixelFormat() const
     301             : {
     302           0 :     if (videoDecoder_)
     303           0 :         return videoDecoder_->getPixelFormat();
     304           0 :     return {};
     305             : }
     306             : 
     307             : MediaStream
     308         122 : VideoReceiveThread::getInfo() const
     309             : {
     310         122 :     if (videoDecoder_)
     311          44 :         return videoDecoder_->getStream("v:remote");
     312          78 :     return {};
     313             : }
     314             : 
     315             : void
     316          45 : VideoReceiveThread::setRotation(int angle)
     317             : {
     318          45 :     libav_utils::AVBufferPtr displayMatrix(av_buffer_alloc(sizeof(int32_t) * 9));
     319          45 :     av_display_rotation_set(reinterpret_cast<int32_t*>(displayMatrix->data), angle);
     320          45 :     std::lock_guard l(rotationMtx_);
     321          45 :     displayMatrix_ = std::move(displayMatrix);
     322          45 : }
     323             : 
     324             : } // namespace video
     325             : } // namespace jami

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