iaudio_callback.h

// SPDX-FileCopyrightText: © 2026 Alexandros Theodotou <alex@zrythm.org>
// SPDX-License-Identifier: LicenseRef-ZrythmLicense
 
#pragma once
 
#include <span>
#include <string_view>
 
#include "utils/units.h"
 
namespace zrythm::dsp
{

class IAudioCallback
{
public:
  virtual ~IAudioCallback () = default;

  virtual void process_audio (
    std::span<const float * const> input_channels,
    std::span<float * const>       output_channels,
    units::sample_u32_t            num_samples) noexcept = 0;

  virtual void about_to_start () = 0;

  virtual void stopped () = 0;

  virtual void error (std::string_view error_message) = 0;
};
 
} // namespace zrythm::dsp