IMediaTracks.h

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// Copyright Epic Games, Inc. All Rights Reserved.
 
#pragma once
 
#include "CoreTypes.h"
#include "Internationalization/Text.h"
#include "Math/IntPoint.h"
#include "Math/Range.h"
#include "Math/RangeSet.h"
 
 
enum class EMediaTrackType
{
    Audio,
 
    Caption,
 
    Metadata,
 
    Script,
 
    Subtitle,
 
    Text,
 
    Video,
 
    Num
};
 
 
struct FMediaAudioTrackFormat
{
    uint32 BitsPerSample;
 
    uint32 NumChannels;
 
    uint32 SampleRate;
 
    FString TypeName;
};
 
 
struct FMediaVideoTrackFormat
{
    FIntPoint Dim;
 
    float FrameRate;
 
    TRange<float> FrameRates;
 
    FString TypeName;
};
 
 
class IMediaTracks
{
public:
 
    virtual bool GetAudioTrackFormat(int32 TrackIndex, int32 FormatIndex, FMediaAudioTrackFormat& OutFormat) const = 0;
 
    virtual int32 GetNumTracks(EMediaTrackType TrackType) const = 0;
 
    virtual int32 GetNumTrackFormats(EMediaTrackType TrackType, int32 TrackIndex) const = 0;
 
    virtual int32 GetSelectedTrack(EMediaTrackType TrackType) const = 0;
 
    virtual FText GetTrackDisplayName(EMediaTrackType TrackType, int32 TrackIndex) const = 0;
 
    virtual int32 GetTrackFormat(EMediaTrackType TrackType, int32 TrackIndex) const = 0;
 
    virtual FString GetTrackLanguage(EMediaTrackType TrackType, int32 TrackIndex) const = 0;
 
    virtual FString GetTrackName(EMediaTrackType TrackType, int32 TrackIndex) const = 0;
 
    virtual bool GetVideoTrackFormat(int32 TrackIndex, int32 FormatIndex, FMediaVideoTrackFormat& OutFormat) const = 0;
 
    virtual bool SelectTrack(EMediaTrackType TrackType, int32 TrackIndex) = 0;
 
    virtual bool SetTrackFormat(EMediaTrackType TrackType, int32 TrackIndex, int32 FormatIndex) = 0;
 
    virtual bool SetVideoTrackFrameRate(int32 TrackIndex, int32 FormatIndex, float FrameRate)
    {
        return false;
    }
 
public:
 
    virtual ~IMediaTracks() { }
};