Line data    Source code

       1             : /*
       2             :  *  Copyright (C) 2004-2025 Savoir-faire Linux Inc.
       3             :  *
       4             :  *  Inspired by tonegenerator of
       5             :  *   Laurielle Lea <laurielle.lea@savoirfairelinux.com> (2004)
       6             :  *
       7             :  *  This program is free software: you can redistribute it and/or modify
       8             :  *  it under the terms of the GNU General Public License as published by
       9             :  *  the Free Software Foundation, either version 3 of the License, or
      10             :  *  (at your option) any later version.
      11             :  *
      12             :  *  This program is distributed in the hope that it will be useful,
      13             :  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
      14             :  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
      15             :  *  GNU General Public License for more details.
      16             :  *
      17             :  *  You should have received a copy of the GNU General Public License
      18             :  *  along with this program. If not, see <https://www.gnu.org/licenses/>.
      19             :  */
      20             : #pragma once
      21             : 
      22             : #include "noncopyable.h"
      23             : #include "audio_format.h"
      24             : #include "media_buffer.h"
      25             : 
      26             : extern "C" {
      27             : #include <libavutil/frame.h>
      28             : }
      29             : 
      30             : /**
      31             :  * @file audioloop.h
      32             :  * @brief Loop on a sound file
      33             :  */
      34             : 
      35             : namespace jami {
      36             : 
      37             : class AudioLoop
      38             : {
      39             : public:
      40             :     AudioLoop(AudioFormat format);
      41             : 
      42             :     AudioLoop& operator=(AudioLoop&& o) noexcept
      43             :     {
      44             :         std::swap(buffer_, o.buffer_);
      45             :         std::swap(pos_, o.pos_);
      46             :         return *this;
      47             :     }
      48             : 
      49             :     virtual ~AudioLoop();
      50             : 
      51             :     /**
      52             :      * Get the next fragment of the tone
      53             :      * the function change the intern position, and will loop
      54             :      * @param output  The data buffer
      55             :      * @param nb of int16 to send
      56             :      * @param gain The gain [-1.0, 1.0]
      57             :      */
      58             :     void getNext(AVFrame* output, bool mute);
      59             :     std::unique_ptr<AudioFrame> getNext(size_t samples = 0, bool mute = false);
      60             : 
      61             :     void seek(double relative_position);
      62             : 
      63             :     /**
      64             :      * Reset the pointer position
      65             :      */
      66          64 :     void reset() { pos_ = 0; }
      67             : 
      68             :     /**
      69             :      * Accessor to the size of the buffer
      70             :      * @return unsigned int The size
      71             :      */
      72           0 :     size_t getSize() const { return buffer_->nb_samples; }
      73         512 :     AudioFormat getFormat() const { return format_; }
      74             : 
      75             : protected:
      76             :     AudioFormat format_;
      77             :     /** The data buffer */
      78             :     libjami::FrameBuffer buffer_ {};
      79             : 
      80             :     /** current position, set to 0, when initialize */
      81             :     size_t pos_ {0};
      82             : 
      83             : private:
      84             :     NON_COPYABLE(AudioLoop);
      85             :     virtual void onBufferFinish();
      86             : };
      87             : 
      88             : } // namespace jami