LCOV - code coverage report
Current view: top level - src/media/video - video_receive_thread.cpp (source / functions) Coverage Total Hit
Test: jami-coverage-filtered.info Lines: 72.0 % 168 121
Test Date: 2026-07-29 09:02:12 Functions: 70.8 % 24 17

            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           55 : VideoReceiveThread::VideoReceiveThread(const std::string& id, bool useSink, const std::string& sdp, uint16_t mtu)
      37              :     : VideoGenerator::VideoGenerator()
      38           55 :     , args_()
      39           55 :     , id_(id)
      40           55 :     , useSink_(useSink)
      41           55 :     , stream_(sdp)
      42           55 :     , sdpContext_(stream_.str().size(), false, &readFunction, 0, 0, this)
      43           55 :     , sink_ {Manager::instance().createSinkClient(id)}
      44           55 :     , mtu_(mtu)
      45          110 :     , loop_(std::bind(&VideoReceiveThread::setup, this),
      46          110 :             std::bind(&VideoReceiveThread::decodeFrame, this),
      47          220 :             std::bind(&VideoReceiveThread::cleanup, this))
      48              : {
      49           55 :     JAMI_LOG("[{}] Instance created", fmt::ptr(this));
      50           55 : }
      51              : 
      52          165 : VideoReceiveThread::~VideoReceiveThread()
      53              : {
      54           55 :     loop_.join();
      55           55 :     JAMI_LOG("[{}] Instance destroyed", fmt::ptr(this));
      56          110 : }
      57              : 
      58              : void
      59           55 : VideoReceiveThread::startLoop()
      60              : {
      61           55 :     JAMI_LOG("[{}] Starting receiver’s loop", fmt::ptr(this));
      62           55 :     loop_.start();
      63           55 : }
      64              : 
      65              : void
      66          114 : VideoReceiveThread::stopLoop()
      67              : {
      68          114 :     if (loop_.isStopping())
      69           59 :         return;
      70           55 :     JAMI_LOG("[{}] Stopping receiver’s loop and waiting for the thread to exit…", fmt::ptr(this));
      71           55 :     loop_.stop();
      72           55 :     loop_.join();
      73           55 :     JAMI_LOG("[{}] Receiver’s thread exited", fmt::ptr(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           55 : VideoReceiveThread::setup()
      80              : {
      81           55 :     JAMI_LOG("[{}] Setting up video receiver", fmt::ptr(this));
      82              : 
      83           55 :     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          110 :     }));
      94           55 :     videoDecoder_->setContextCallback([this]() {
      95            0 :         if (recorderCallback_)
      96            0 :             recorderCallback_(getInfo());
      97            0 :     });
      98            0 :     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           55 :     dstWidth_ = static_cast<int>(args_.width);
     105           55 :     dstHeight_ = static_cast<int>(args_.height);
     106              : 
     107           55 :     static const std::string SDP_FILENAME = "dummyFilename";
     108           55 :     if (args_.input.empty()) {
     109           55 :         args_.format = "sdp";
     110           55 :         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           55 :     videoDecoder_->setInterruptCallback(interruptCb, this);
     119              : 
     120           55 :     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           55 :         args_.sdp_flags = "custom_io";
     124              : 
     125           55 :         if (stream_.str().empty()) {
     126            0 :             JAMI_ERROR("No SDP loaded");
     127            0 :             return false;
     128              :         }
     129              : 
     130           55 :         videoDecoder_->setIOContext(&sdpContext_);
     131              :     }
     132              : 
     133           55 :     args_.disable_dts_probe_delay = true;
     134              : 
     135           55 :     if (videoDecoder_->openInput(args_)) {
     136            0 :         JAMI_ERROR("Unable to open input \"{}\"", args_.input);
     137            0 :         return false;
     138              :     }
     139              : 
     140           55 :     videoDecoder_->setKeyFrameRequestCb(keyFrameRequestCallback_);
     141              : 
     142           55 :     if (args_.input == SDP_FILENAME) {
     143              :         // Now replace our custom AVIOContext with one that will read packets
     144           55 :         videoDecoder_->setIOContext(demuxContext_.get());
     145              :     }
     146           55 :     return true;
     147              : }
     148              : 
     149              : void
     150           55 : VideoReceiveThread::cleanup()
     151              : {
     152           55 :     JAMI_LOG("[{}] Stopping receiver", fmt::ptr(this));
     153              : 
     154           55 :     detach(sink_.get());
     155           55 :     sink_->stop();
     156              : 
     157           55 :     videoDecoder_.reset();
     158           55 : }
     159              : 
     160              : // This callback is used by libav internally to break out of blocking calls
     161              : int
     162           56 : VideoReceiveThread::interruptCb(void* data)
     163              : {
     164           56 :     auto* const context = static_cast<VideoReceiveThread*>(data);
     165           56 :     return not context->loop_.isRunning();
     166              : }
     167              : 
     168              : int
     169          185 : VideoReceiveThread::readFunction(void* opaque, uint8_t* buf, int buf_size)
     170              : {
     171          185 :     std::istream& is = static_cast<VideoReceiveThread*>(opaque)->stream_;
     172          185 :     is.read(reinterpret_cast<char*>(buf), buf_size);
     173              : 
     174          185 :     auto count = is.gcount();
     175          185 :     if (count != 0)
     176           55 :         return static_cast<int>(count);
     177              :     else
     178          130 :         return AVERROR_EOF;
     179              : }
     180              : 
     181              : void
     182           55 : VideoReceiveThread::addIOContext(SocketPair& socketPair)
     183              : {
     184           55 :     demuxContext_.reset(socketPair.createIOContext(mtu_));
     185           55 : }
     186              : 
     187              : void
     188           60 : VideoReceiveThread::setRecorderCallback(const std::function<void(const MediaStream& ms)>& cb)
     189              : {
     190           60 :     recorderCallback_ = cb;
     191           60 :     if (videoDecoder_)
     192            2 :         videoDecoder_->setContextCallback([this]() {
     193            0 :             if (recorderCallback_)
     194            0 :                 recorderCallback_(getInfo());
     195            0 :         });
     196           60 : }
     197              : 
     198              : void
     199           58 : VideoReceiveThread::decodeFrame()
     200              : {
     201           58 :     if (not loop_.isRunning())
     202            0 :         return;
     203              : 
     204           58 :     if (not isVideoConfigured_) {
     205           55 :         if (!configureVideoOutput()) {
     206            0 :             JAMI_ERROR("[{:p}] Failed to configure video output", fmt::ptr(this));
     207            0 :             return;
     208              :         } else {
     209           55 :             JAMI_LOG("[{:p}] Decoder configured, starting decoding", fmt::ptr(this));
     210              :         }
     211              :     }
     212           58 :     auto status = videoDecoder_->decode();
     213           58 :     if (status == MediaDemuxer::Status::EndOfFile) {
     214           54 :         JAMI_LOG("[{:p}] End of file", fmt::ptr(this));
     215           54 :         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           55 : VideoReceiveThread::configureVideoOutput()
     226              : {
     227           55 :     assert(not isVideoConfigured_);
     228              : 
     229           55 :     JAMI_LOG("[{}] Configuring video output", fmt::ptr(this));
     230              : 
     231           55 :     if (not loop_.isRunning()) {
     232            0 :         JAMI_WARNING("[{}] Unable to configure video output, the loop is not running!", fmt::ptr(this));
     233            0 :         return false;
     234              :     }
     235              : 
     236           55 :     if (videoDecoder_->setupVideo() < 0) {
     237            0 :         JAMI_ERROR("Decoder IO startup failed");
     238            0 :         stopLoop();
     239            0 :         return false;
     240              :     }
     241              : 
     242              :     // Default size from input video
     243           55 :     if (dstWidth_ == 0 and dstHeight_ == 0) {
     244           55 :         dstWidth_ = videoDecoder_->getWidth();
     245           55 :         dstHeight_ = videoDecoder_->getHeight();
     246              :     }
     247              : 
     248           55 :     if (not sink_->start()) {
     249            0 :         JAMI_ERROR("RX: sink startup failed");
     250            0 :         stopLoop();
     251            0 :         return false;
     252              :     }
     253              : 
     254           55 :     if (useSink_)
     255           54 :         startSink();
     256              : 
     257           55 :     if (onSuccessfulSetup_)
     258           55 :         onSuccessfulSetup_(MEDIA_VIDEO, 1);
     259              : 
     260           55 :     return isVideoConfigured_ = true;
     261              : }
     262              : 
     263              : void
     264          115 : VideoReceiveThread::stopSink()
     265              : {
     266          115 :     JAMI_LOG("[{}] Stopping sink", fmt::ptr(this));
     267              : 
     268          115 :     if (!loop_.isRunning())
     269          114 :         return;
     270              : 
     271            1 :     detach(sink_.get());
     272            1 :     sink_->setFrameSize(0, 0);
     273              : }
     274              : 
     275              : void
     276           55 : VideoReceiveThread::startSink()
     277              : {
     278           55 :     JAMI_LOG("[{}] Starting sink", fmt::ptr(this));
     279              : 
     280           55 :     if (!loop_.isRunning())
     281           53 :         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          157 : VideoReceiveThread::getInfo() const
     309              : {
     310          157 :     if (videoDecoder_)
     311          165 :         return videoDecoder_->getStream("v:remote");
     312          102 :     return {};
     313              : }
     314              : 
     315              : void
     316           56 : VideoReceiveThread::setRotation(int angle)
     317              : {
     318           56 :     libav_utils::AVBufferPtr displayMatrix(av_buffer_alloc(sizeof(int32_t) * 9));
     319           56 :     av_display_rotation_set(reinterpret_cast<int32_t*>(displayMatrix->data), angle);
     320           56 :     std::lock_guard l(rotationMtx_);
     321           56 :     displayMatrix_ = std::move(displayMatrix);
     322           56 : }
     323              : 
     324              : } // namespace video
     325              : } // namespace jami
        

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