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#pragma once
#include "../Base/Object.h"
#include <Containers/StringView.h>
#include <IO/Stream.h>
using namespace Death::Containers;
namespace nCine
{
class IAudioLoader;
/// OpenAL audio buffer
/*! It inherits from `Object` because a buffer can be
* shared by more than one `AudioBufferPlayer` object. */
class AudioBuffer : public Object
{
public:
/** @brief Audio format */
enum class Format {
Mono8,
Stereo8,
Mono16,
Stereo16
};
/// Creates an OpenAL buffer name
AudioBuffer();
/// A constructor creating a buffer from a file
explicit AudioBuffer(StringView filename);
AudioBuffer(std::unique_ptr<Death::IO::Stream> fileHandle, StringView filename);
~AudioBuffer() override;
AudioBuffer(const AudioBuffer&) = delete;
AudioBuffer& operator=(const AudioBuffer&) = delete;
AudioBuffer(AudioBuffer&& other) noexcept;
AudioBuffer& operator=(AudioBuffer&& other) noexcept;
/// Initializes an empty buffer with the specified format and frequency
void init(Format format, std::int32_t frequency);
bool loadFromFile(StringView filename);
bool loadFromStream(std::unique_ptr<Death::IO::Stream> fileHandle, StringView filename);
/// Loads samples in raw PCM format from a memory buffer
bool loadFromSamples(const unsigned char* bufferPtr, std::int32_t bufferSize);
/// Returns the OpenAL buffer id
inline std::uint32_t bufferId() const {
return bufferId_;
}
/// Returns the number of bytes per sample
inline std::int32_t bytesPerSample() const {
return bytesPerSample_;
}
/// Returns the number of audio channels
inline std::int32_t numChannels() const {
return numChannels_;
}
/// Returns the samples frequency
inline std::int32_t frequency() const {
return frequency_;
}
/// Returns number of samples
inline std::int32_t numSamples() const {
return numSamples_;
}
/// Returns the duration in seconds
inline float duration() const {
return duration_;
}
/// Returns the size of the buffer in bytes
inline std::int32_t bufferSize() const {
return numSamples_ * numChannels_ * bytesPerSample_;
}
inline static ObjectType sType() {
return ObjectType::AudioBuffer;
}
private:
/// The OpenAL buffer id
std::uint32_t bufferId_;
/// Number of bytes per sample
std::int32_t bytesPerSample_;
/// Number of channels
std::int32_t numChannels_;
/// Samples frequency
std::int32_t frequency_;
/// Number of samples
std::int32_t numSamples_;
/// Duration in seconds
float duration_;
/// Loads audio samples based on information from the audio loader and reader
bool load(IAudioLoader& audioLoader);
};
}
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