Line data    Source code

       1             : /*  Copyright (C) 2004-2024 Savoir-faire Linux Inc.
       2             :  *
       3             :  *  Author: Yan Morin <yan.morin@savoirfairelinux.com>
       4             :  *
       5             :  *  Inspired by tonegenerator of
       6             :  *   Laurielle Lea <laurielle.lea@savoirfairelinux.com> (2004)
       7             :  *  Inspired by ringbuffer of Audacity Project
       8             :  *
       9             :  *  This program is free software; you can redistribute it and/or modify
      10             :  *  it under the terms of the GNU General Public License as published by
      11             :  *  the Free Software Foundation; either version 3 of the License, or
      12             :  *  (at your option) any later version.
      13             :  *
      14             :  *  This program is distributed in the hope that it will be useful,
      15             :  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
      16             :  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
      17             :  *  GNU General Public License for more details.
      18             :  *
      19             :  *  You should have received a copy of the GNU General Public License
      20             :  *  along with this program; if not, write to the Free Software
      21             :  *  Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301 USA.
      22             :  */
      23             : #include <fstream>
      24             : #include <cmath>
      25             : #include <cstring>
      26             : #include <vector>
      27             : #include <climits>
      28             : 
      29             : #include "libav_deps.h"
      30             : #include "audiofile.h"
      31             : #include "audio/resampler.h"
      32             : #include "manager.h"
      33             : #include "media_decoder.h"
      34             : #include "client/ring_signal.h"
      35             : 
      36             : #include "logger.h"
      37             : 
      38             : namespace jami {
      39             : 
      40             : void
      41           0 : AudioFile::onBufferFinish()
      42             : {
      43           0 :     if (buffer_->sample_rate == 0) {
      44           0 :         JAMI_ERR("Error cannot update playback slider, sampling rate is 0");
      45           0 :         return;
      46             :     }
      47             : 
      48             :     // We want to send values in milisecond
      49           0 :     if ((updatePlaybackScale_ % 5) == 0)
      50           0 :         emitSignal<libjami::CallSignal::UpdatePlaybackScale>(filepath_,
      51           0 :                                                            (unsigned) (1000lu * pos_ / buffer_->sample_rate),
      52           0 :                                                            (unsigned) (1000lu * buffer_->nb_samples / buffer_->sample_rate));
      53             : 
      54           0 :     updatePlaybackScale_++;
      55             : }
      56             : 
      57          60 : AudioFile::AudioFile(const std::string& fileName, unsigned int sampleRate, AVSampleFormat sampleFormat)
      58             :     : AudioLoop(AudioFormat(sampleRate, 1, sampleFormat))
      59          60 :     , filepath_(fileName)
      60          60 :     , updatePlaybackScale_(0)
      61             : {
      62          60 :     std::list<std::shared_ptr<AudioFrame>> buf;
      63          60 :     size_t total_samples = 0;
      64             : 
      65          60 :     auto start = std::chrono::steady_clock::now();
      66          60 :     Resampler r {};
      67             :     auto decoder = std::make_unique<MediaDecoder>(
      68           0 :         [&r, this, &buf, &total_samples](const std::shared_ptr<MediaFrame>& frame) mutable {
      69           0 :             auto resampled = r.resample(std::static_pointer_cast<AudioFrame>(frame), format_);
      70           0 :             total_samples += resampled->getFrameSize();
      71           0 :             buf.emplace_back(std::move(resampled));
      72          60 :         });
      73          60 :     DeviceParams dev;
      74          60 :     dev.input = fileName;
      75          60 :     dev.name = fileName;
      76             : 
      77          60 :     if (decoder->openInput(dev) < 0)
      78          60 :         throw AudioFileException("File could not be opened: " + fileName);
      79             : 
      80           0 :     if (decoder->setupAudio() < 0)
      81           0 :         throw AudioFileException("Decoder setup failed: " + fileName);
      82             : 
      83           0 :     while (decoder->decode() != MediaDemuxer::Status::EndOfFile)
      84             :         ;
      85             : 
      86           0 :     buffer_->nb_samples = total_samples;
      87           0 :     buffer_->format = format_.sampleFormat;
      88           0 :     buffer_->sample_rate = format_.sample_rate;
      89           0 :     av_channel_layout_default(&buffer_->ch_layout, format_.nb_channels);
      90           0 :     av_frame_get_buffer(buffer_.get(), 0);
      91             : 
      92           0 :     size_t outPos = 0;
      93           0 :     for (auto& frame : buf) {
      94           0 :         av_samples_copy(buffer_->data, frame->pointer()->data, outPos, 0, frame->getFrameSize(), format_.nb_channels, format_.sampleFormat);
      95           0 :         outPos += frame->getFrameSize();
      96             :     }
      97           0 :     auto end = std::chrono::steady_clock::now();
      98           0 :     auto audioDuration = std::chrono::duration<double>(total_samples/(double)format_.sample_rate);
      99           0 :     JAMI_LOG("AudioFile: loaded {} samples ({}) as {} in {} from {:s}",
     100             :         total_samples, audioDuration, format_.toString(), dht::print_duration(end-start), fileName);
     101         360 : }
     102             : 
     103             : } // namespace jami