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#pragma once
#include "sources/audiosourceproxy.h"
#include "track/track_decl.h"
namespace mixxx {
class TrackPointerHolder {
public:
explicit TrackPointerHolder(
TrackPointer&& pTrack)
: m_pTrack(std::move(pTrack)) {
}
private:
TrackPointer m_pTrack;
};
// Keeps the Track object alive while accessing the audio data
// of the track. The Track object must not be deleted while
// accessing the corresponding file to avoid file
// corruption when writing metadata while the file
// is still in use.
class AudioSourceTrackProxy : private TrackPointerHolder,
// The audio source must be closed BEFORE releasing the track
// pointer to close any open file handles. Otherwise exporting
// track metadata into the same file may not work, because the
// file is still locked by the OS!
public AudioSourceProxy {
public:
static AudioSourcePointer create(
TrackPointer pTrack,
AudioSourcePointer pAudioSource) {
return std::make_shared<AudioSourceTrackProxy>(
std::move(pTrack),
std::move(pAudioSource));
}
AudioSourceTrackProxy(
TrackPointer pTrack,
AudioSourcePointer pAudioSource)
: TrackPointerHolder(std::move(pTrack)),
AudioSourceProxy(std::move(pAudioSource)) {
}
};
} // namespace mixxx
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