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 "audio_receive_thread.h"
      19             : #include "libav_deps.h"
      20             : #include "logger.h"
      21             : #include "manager.h"
      22             : #include "media_decoder.h"
      23             : #include "media_io_handle.h"
      24             : #include "ringbufferpool.h"
      25             : 
      26             : #include <memory>
      27             : 
      28             : namespace jami {
      29             : 
      30          72 : AudioReceiveThread::AudioReceiveThread(const std::string& streamId,
      31             :                                        const AudioFormat& format,
      32             :                                        const std::string& sdp,
      33          72 :                                        const uint16_t mtu)
      34          72 :     : streamId_(streamId)
      35          72 :     , format_(format)
      36          72 :     , stream_(sdp)
      37          72 :     , sdpContext_(new MediaIOHandle(sdp.size(), false, &readFunction, 0, 0, this))
      38          72 :     , mtu_(mtu)
      39         144 :     , loop_(std::bind(&AudioReceiveThread::setup, this),
      40         144 :             std::bind(&AudioReceiveThread::process, this),
      41         288 :             std::bind(&AudioReceiveThread::cleanup, this))
      42          72 : {}
      43             : 
      44         216 : AudioReceiveThread::~AudioReceiveThread()
      45             : {
      46          72 :     loop_.join();
      47         144 : }
      48             : 
      49             : bool
      50          72 : AudioReceiveThread::setup()
      51             : {
      52          72 :     std::lock_guard lk(mutex_);
      53         144 :     audioDecoder_.reset(new MediaDecoder([this](std::shared_ptr<MediaFrame>&& frame) mutable {
      54           0 :         notify(frame);
      55           0 :         ringbuffer_->put(std::static_pointer_cast<AudioFrame>(frame));
      56          72 :     }));
      57          72 :     audioDecoder_->setContextCallback([this]() {
      58           0 :         if (recorderCallback_)
      59           0 :             recorderCallback_(getInfo());
      60           0 :     });
      61          72 :     audioDecoder_->setInterruptCallback(interruptCb, this);
      62             : 
      63             :     // custom_io so the SDP demuxer will not open any UDP connections
      64          72 :     args_.input = SDP_FILENAME;
      65          72 :     args_.format = "sdp";
      66          72 :     args_.sdp_flags = "custom_io";
      67             : 
      68          72 :     if (stream_.str().empty()) {
      69           0 :         JAMI_ERR("No SDP loaded");
      70           0 :         return false;
      71             :     }
      72             : 
      73          72 :     audioDecoder_->setIOContext(sdpContext_.get());
      74          72 :     audioDecoder_->setFEC(true);
      75          72 :     if (audioDecoder_->openInput(args_)) {
      76           0 :         JAMI_ERR("Unable to open input \"%s\"", SDP_FILENAME);
      77           0 :         return false;
      78             :     }
      79             : 
      80             :     // Now replace our custom AVIOContext with one that will read packets
      81          72 :     audioDecoder_->setIOContext(demuxContext_.get());
      82          72 :     if (audioDecoder_->setupAudio()) {
      83           0 :         JAMI_ERR("decoder IO startup failed");
      84           0 :         return false;
      85             :     }
      86             : 
      87          72 :     ringbuffer_ = Manager::instance().getRingBufferPool().createRingBuffer(streamId_);
      88             : 
      89          72 :     if (onSuccessfulSetup_)
      90          72 :         onSuccessfulSetup_(MEDIA_AUDIO, 1);
      91             : 
      92          72 :     return true;
      93          72 : }
      94             : 
      95             : void
      96           0 : AudioReceiveThread::process()
      97             : {
      98           0 :     audioDecoder_->decode();
      99           0 : }
     100             : 
     101             : void
     102          72 : AudioReceiveThread::cleanup()
     103             : {
     104          72 :     std::lock_guard lk(mutex_);
     105          72 :     audioDecoder_.reset();
     106          72 :     demuxContext_.reset();
     107          72 : }
     108             : 
     109             : int
     110         288 : AudioReceiveThread::readFunction(void* opaque, uint8_t* buf, int buf_size)
     111             : {
     112         288 :     std::istream& is = static_cast<AudioReceiveThread*>(opaque)->stream_;
     113         288 :     is.read(reinterpret_cast<char*>(buf), buf_size);
     114             : 
     115         288 :     auto count = is.gcount();
     116         288 :     return count ? static_cast<int>(count) : AVERROR_EOF;
     117             : }
     118             : 
     119             : // This callback is used by libav internally to break out of blocking calls
     120             : int
     121          72 : AudioReceiveThread::interruptCb(void* data)
     122             : {
     123          72 :     auto* context = static_cast<AudioReceiveThread*>(data);
     124          72 :     return not context->loop_.isRunning();
     125             : }
     126             : 
     127             : void
     128          72 : AudioReceiveThread::addIOContext(SocketPair& socketPair)
     129             : {
     130          72 :     demuxContext_.reset(socketPair.createIOContext(mtu_));
     131          72 : }
     132             : 
     133             : void
     134          72 : AudioReceiveThread::setRecorderCallback(const std::function<void(const MediaStream& ms)>& cb)
     135             : {
     136          72 :     recorderCallback_ = cb;
     137          72 :     if (audioDecoder_)
     138           0 :         audioDecoder_->setContextCallback([this]() {
     139           0 :             if (recorderCallback_)
     140           0 :                 recorderCallback_(getInfo());
     141           0 :         });
     142          72 : }
     143             : 
     144             : MediaStream
     145           3 : AudioReceiveThread::getInfo() const
     146             : {
     147           3 :     if (!audioDecoder_)
     148           0 :         return {};
     149           3 :     return audioDecoder_->getStream("a:remote");
     150             : }
     151             : 
     152             : void
     153          72 : AudioReceiveThread::startReceiver()
     154             : {
     155          72 :     loop_.start();
     156          72 : }
     157             : 
     158             : void
     159          72 : AudioReceiveThread::stopReceiver()
     160             : {
     161          72 :     loop_.stop();
     162          72 : }
     163             : 
     164             : }; // namespace jami