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/* This file is part of the Spring engine (GPL v2 or later), see LICENSE.html */
#ifndef AUDIO_CHANNEL_H
#define AUDIO_CHANNEL_H
#include <vector>
#include <cstring>
#include "System/Sound/IAudioChannel.h"
#include "System/UnorderedSet.hpp"
struct GuiSoundSet;
class CSoundSource;
class CWorldObject;
/**
* @brief Channel for playing sounds
*
* Has its own volume "slider", and can be enabled / disabled seperately.
* Abstract base class.
*/
class AudioChannel : public IAudioChannel {
private:
typedef std::pair<std::string, float> StreamQueueItem;
public:
AudioChannel(): curStreamSrc(nullptr) {}
void Enable(bool newState);
void SetVolume(float newVolume);
void PlaySample(size_t id, float volume = 1.0f);
void PlaySample(size_t id, const float3& pos, float volume = 1.0f);
void PlaySample(size_t id, const float3& pos, const float3& velocity, float volume = 1.0f);
void PlaySample(size_t id, const CWorldObject* obj, float volume = 1.0f);
void PlayRandomSample(const GuiSoundSet& soundSet, const CWorldObject* obj);
void PlayRandomSample(const GuiSoundSet& soundSet, const float3& pos);
void StreamPlay(const StreamQueueItem& item, bool enqueue) { StreamPlay(item.first, item.second, enqueue); }
void StreamPlay(const std::string& path, float volume = 1.0f, bool enqueue = false);
/**
* @brief Stop playback
*
* Do not call this if you just want to play another file (for performance).
*/
void StreamStop();
void StreamPause();
float StreamGetTime();
float StreamGetPlayTime();
protected:
void FindSourceAndPlay(size_t id, const float3& pos, const float3& velocity, float volume, bool relative);
void SoundSourceFinished(CSoundSource* sndSource);
private:
spring::unsynced_set<CSoundSource*> curSources;
std::vector<StreamQueueItem> streamQueue;
CSoundSource* curStreamSrc;
static constexpr size_t MAX_STREAM_QUEUESIZE = 10;
};
#endif // AUDIO_CHANNEL_H
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