Line data    Source code

       1             : /*
       2             :  *  Copyright (C) 2004-2024 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 "ring_types.h"
      23             : #include "noncopyable.h"
      24             : #include "audio_format.h"
      25             : #include "media_buffer.h"
      26             : 
      27             : extern "C" {
      28             : #include <libavutil/frame.h>
      29             : }
      30             : 
      31             : /**
      32             :  * @file audioloop.h
      33             :  * @brief Loop on a sound file
      34             :  */
      35             : 
      36             : namespace jami {
      37             : 
      38             : class AudioLoop
      39             : {
      40             : public:
      41             :     AudioLoop(AudioFormat format);
      42             : 
      43             :     AudioLoop& operator=(AudioLoop&& o) noexcept
      44             :     {
      45             :         std::swap(buffer_, o.buffer_);
      46             :         std::swap(pos_, o.pos_);
      47             :         return *this;
      48             :     }
      49             : 
      50             :     virtual ~AudioLoop();
      51             : 
      52             :     /**
      53             :      * Get the next fragment of the tone
      54             :      * the function change the intern position, and will loop
      55             :      * @param output  The data buffer
      56             :      * @param nb of int16 to send
      57             :      * @param gain The gain [-1.0, 1.0]
      58             :      */
      59             :     void getNext(AVFrame* output, bool mute);
      60             :     std::unique_ptr<AudioFrame> getNext(size_t samples = 0, bool mute = false);
      61             : 
      62             :     void seek(double relative_position);
      63             : 
      64             :     /**
      65             :      * Reset the pointer position
      66             :      */
      67          72 :     void reset() { pos_ = 0; }
      68             : 
      69             :     /**
      70             :      * Accessor to the size of the buffer
      71             :      * @return unsigned int The size
      72             :      */
      73           0 :     size_t getSize() const { return buffer_->nb_samples; }
      74         528 :     AudioFormat getFormat() const { return format_; }
      75             : 
      76             : protected:
      77             :     AudioFormat format_;
      78             :     /** The data buffer */
      79             :     libjami::FrameBuffer buffer_ {};
      80             : 
      81             :     /** current position, set to 0, when initialize */
      82             :     size_t pos_ {0};
      83             : 
      84             : private:
      85             :     NON_COPYABLE(AudioLoop);
      86             :     virtual void onBufferFinish();
      87             : };
      88             : 
      89             : } // namespace jami