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#pragma once
typedef enum TrackType {
TypeVideo = 1,
TypeAudio = 2,
TypeComplex = 3,
TypeLogo = 0x10,
TypeSubtitle = 0x11,
TypeControl = 0x20
};
#pragma pack(push, 1)
struct TrackElement {
WORD Size; // Size of this structure
BYTE Type; // See TrackType
BOOL FlagDefault; // Set if the track is the default for its TrackType.
BOOL FlagForced; // Set if that track MUST be used during playback.
BOOL FlagLacing; // Set if the track may contain blocks using lacing.
UINT MinCache; // The minimum number of frames a player should be able to cache during playback.
UINT MaxCache; // The maximum cache size required to store referenced frames in and the current frame. 0 means no cache is needed.
CHAR Language[4]; // Specifies the language of the track, in the ISO-639-2 form. (end with '\0')
};
struct TrackExtendedInfoVideo {
WORD Size; // Size of this structure
BOOL Interlaced; // Set if the video is interlaced.
UINT PixelWidth; // Width of the encoded video frames in pixels.
UINT PixelHeight; // Height of the encoded video frames in pixels.
UINT DisplayWidth; // Width of the video frames to display.
UINT DisplayHeight; // Height of the video frames to display.
BYTE DisplayUnit; // Type of the unit for DisplayWidth/Height (0: pixels, 1: centimeters, 2: inches).
BYTE AspectRatioType; // Specify the possible modifications to the aspect ratio (0: free resizing, 1: keep aspect ratio, 2: fixed).
};
struct TrackExtendedInfoAudio {
WORD Size; // Size of this structure
FLOAT SamplingFreq; // Sampling frequency in Hz.
FLOAT OutputSamplingFrequency; // Real output sampling frequency in Hz (used for SBR techniques).
UINT Channels; // Numbers of channels in the track.
UINT BitDepth; // Bits per sample, mostly used for PCM.
};
#pragma pack(pop)
interface __declspec(uuid("03E98D51-DDE7-43aa-B70C-42EF84A3A23D"))
ITrackInfo :
public IUnknown {
STDMETHOD_(UINT, GetTrackCount) () = 0;
// \param aTrackIdx the track index (from 0 to GetTrackCount()-1)
STDMETHOD_(BOOL, GetTrackInfo) (UINT aTrackIdx, struct TrackElement* pStructureToFill) = 0;
// Get an extended information struct relative to the track type
STDMETHOD_(BOOL, GetTrackExtendedInfo) (UINT aTrackIdx, void* pStructureToFill) = 0;
STDMETHOD_(BSTR, GetTrackCodecID) (UINT aTrackIdx) = 0;
STDMETHOD_(BSTR, GetTrackName) (UINT aTrackIdx) = 0;
STDMETHOD_(BSTR, GetTrackCodecName) (UINT aTrackIdx) = 0;
STDMETHOD_(BSTR, GetTrackCodecInfoURL) (UINT aTrackIdx) = 0;
STDMETHOD_(BSTR, GetTrackCodecDownloadURL) (UINT aTrackIdx) = 0;
};
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