engine_audio.hpp

/*
 * MIT License
 *
 * Copyright (c) 2024 Giovanni Santini
 
 * Permission is hereby granted, free of charge, to any person obtaining a copy
 * of this software and associated documentation files (the "Software"), to deal
 * in the Software without restriction, including without limitation the rights
 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
 * copies of the Software, and to permit persons to whom the Software is
 * furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included in
 all
 * copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
 * SOFTWARE.
 *
 */
 
#pragma once
 
#include <SDL3/SDL_audio.h>
#include <string>
#include <unordered_map>
#include <vector>
 
namespace Brenta
{
 
namespace Types
{
 
typedef std::string StreamName;
 
typedef std::string AudioName;
 
struct AudioFile
{
    std::string path;
    Uint8 *audio_buf;
    Uint32 audio_len;
    SDL_AudioSpec spec;
};
 
/*
 * typedef struct SDL_AudioSpec
 * {
 *   SDL_AudioFormat format; // Audio data format
 *   int channels;           // Number of channels: 1 mono, 2 stereo, etc
 *   int freq;               // sample rate: sample frames per second
 * } SDL_AudioSpec;
 *
 */
 
} // namespace Types
 
class Audio
{
  public:
    static std::unordered_map<Types::AudioName, Types::AudioFile> audiofiles;
    static std::unordered_map<Types::StreamName, SDL_AudioStream *> streams;
 
    Audio() = delete;
    static void Init();
    static void Destroy();
 
    static Types::AudioFile GetAudioFile(Types::AudioName name);
    static SDL_AudioStream *GetStream(Types::StreamName name);
 
    static void LoadAudio(Types::AudioName name, std::string path);
    static void CreateStream(Types::StreamName);
    static void PlayAudio(Types::AudioName, Types::StreamName = "default");
    static void SetVolume(Types::StreamName name, int volume);
    static void PauseStream(Types::StreamName name);
    static void ResumeStream(Types::StreamName name);
    static void ClearStream(Types::StreamName name);
 
  private:
    static void CheckError();
};
 
} // namespace Brenta