Line data    Source code

       1             : /*
       2             :  *  Copyright (C) 2004-2024 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 "media_recorder.h"
      25             : #include "ringbuffer.h"
      26             : #include "ringbufferpool.h"
      27             : 
      28             : #include <memory>
      29             : 
      30             : namespace jami {
      31             : 
      32         191 : AudioReceiveThread::AudioReceiveThread(const std::string& streamId,
      33             :                                        const AudioFormat& format,
      34             :                                        const std::string& sdp,
      35         191 :                                        const uint16_t mtu)
      36         191 :     : streamId_(streamId)
      37         191 :     , format_(format)
      38         191 :     , stream_(sdp)
      39         191 :     , sdpContext_(new MediaIOHandle(sdp.size(), false, &readFunction, 0, 0, this))
      40         191 :     , mtu_(mtu)
      41         382 :     , loop_(std::bind(&AudioReceiveThread::setup, this),
      42         382 :             std::bind(&AudioReceiveThread::process, this),
      43         764 :             std::bind(&AudioReceiveThread::cleanup, this))
      44         191 : {}
      45             : 
      46         573 : AudioReceiveThread::~AudioReceiveThread()
      47             : {
      48         191 :     loop_.join();
      49         382 : }
      50             : 
      51             : bool
      52         191 : AudioReceiveThread::setup()
      53             : {
      54         191 :     std::lock_guard lk(mutex_);
      55         382 :     audioDecoder_.reset(new MediaDecoder([this](std::shared_ptr<MediaFrame>&& frame) mutable {
      56           0 :         notify(frame);
      57           0 :         ringbuffer_->put(std::static_pointer_cast<AudioFrame>(frame));
      58         191 :     }));
      59         191 :     audioDecoder_->setContextCallback([this]() {
      60           0 :         if (recorderCallback_)
      61           0 :             recorderCallback_(getInfo());
      62           0 :     });
      63         191 :     audioDecoder_->setInterruptCallback(interruptCb, this);
      64             : 
      65             :     // custom_io so the SDP demuxer will not open any UDP connections
      66         191 :     args_.input = SDP_FILENAME;
      67         191 :     args_.format = "sdp";
      68         191 :     args_.sdp_flags = "custom_io";
      69             : 
      70         191 :     if (stream_.str().empty()) {
      71           0 :         JAMI_ERR("No SDP loaded");
      72           0 :         return false;
      73             :     }
      74             : 
      75         191 :     audioDecoder_->setIOContext(sdpContext_.get());
      76         191 :     audioDecoder_->setFEC(true);
      77         191 :     if (audioDecoder_->openInput(args_)) {
      78           0 :         JAMI_ERR("Unable to open input \"%s\"", SDP_FILENAME);
      79           0 :         return false;
      80             :     }
      81             : 
      82             :     // Now replace our custom AVIOContext with one that will read packets
      83         191 :     audioDecoder_->setIOContext(demuxContext_.get());
      84         191 :     if (audioDecoder_->setupAudio()) {
      85           0 :         JAMI_ERR("decoder IO startup failed");
      86           0 :         return false;
      87             :     }
      88             : 
      89         191 :     ringbuffer_ = Manager::instance().getRingBufferPool().createRingBuffer(streamId_);
      90             : 
      91         191 :     if (onSuccessfulSetup_)
      92         191 :         onSuccessfulSetup_(MEDIA_AUDIO, 1);
      93             : 
      94         191 :     return true;
      95         191 : }
      96             : 
      97             : void
      98           0 : AudioReceiveThread::process()
      99             : {
     100           0 :     audioDecoder_->decode();
     101           0 : }
     102             : 
     103             : void
     104         191 : AudioReceiveThread::cleanup()
     105             : {
     106         191 :     std::lock_guard lk(mutex_);
     107         191 :     audioDecoder_.reset();
     108         191 :     demuxContext_.reset();
     109         191 : }
     110             : 
     111             : int
     112         764 : AudioReceiveThread::readFunction(void* opaque, uint8_t* buf, int buf_size)
     113             : {
     114         764 :     std::istream& is = static_cast<AudioReceiveThread*>(opaque)->stream_;
     115         764 :     is.read(reinterpret_cast<char*>(buf), buf_size);
     116             : 
     117         764 :     auto count = is.gcount();
     118         764 :     return count ? count : AVERROR_EOF;
     119             : }
     120             : 
     121             : // This callback is used by libav internally to break out of blocking calls
     122             : int
     123         191 : AudioReceiveThread::interruptCb(void* data)
     124             : {
     125         191 :     auto context = static_cast<AudioReceiveThread*>(data);
     126         191 :     return not context->loop_.isRunning();
     127             : }
     128             : 
     129             : void
     130         191 : AudioReceiveThread::addIOContext(SocketPair& socketPair)
     131             : {
     132         191 :     demuxContext_.reset(socketPair.createIOContext(mtu_));
     133         191 : }
     134             : 
     135             : void
     136         197 : AudioReceiveThread::setRecorderCallback(
     137             :     const std::function<void(const MediaStream& ms)>& cb)
     138             : {
     139         197 :     recorderCallback_ = cb;
     140         197 :     if (audioDecoder_)
     141           6 :         audioDecoder_->setContextCallback([this]() {
     142           0 :             if (recorderCallback_)
     143           0 :                 recorderCallback_(getInfo());
     144           0 :         });
     145         197 : }
     146             : 
     147             : MediaStream
     148           6 : AudioReceiveThread::getInfo() const
     149             : {
     150           6 :     if (!audioDecoder_)
     151           0 :         return {};
     152           6 :     return audioDecoder_->getStream("a:remote");
     153             : }
     154             : 
     155             : void
     156         191 : AudioReceiveThread::startReceiver()
     157             : {
     158         191 :     loop_.start();
     159         191 : }
     160             : 
     161             : void
     162         191 : AudioReceiveThread::stopReceiver()
     163             : {
     164         191 :     loop_.stop();
     165         191 : }
     166             : 
     167             : }; // namespace jami