90 lines
2.1 KiB
C#
90 lines
2.1 KiB
C#
using System;
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using System.IO;
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using MoonWorks.Graphics;
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namespace MoonWorks.Video
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{
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/// <summary>
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/// This class takes in a filename for AV1 data in .obu (open bitstream unit) format
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/// </summary>
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public unsafe class VideoAV1 : GraphicsResource
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{
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public string Filename { get; }
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// "double buffering" so we can loop without a stutter
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internal VideoAV1Stream StreamA { get; }
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internal VideoAV1Stream StreamB { get; }
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public int Width => width;
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public int Height => height;
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public double FramesPerSecond { get; set; }
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public Dav1dfile.PixelLayout PixelLayout => pixelLayout;
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public int UVWidth { get; }
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public int UVHeight { get; }
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private int width;
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private int height;
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private Dav1dfile.PixelLayout pixelLayout;
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/// <summary>
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/// Opens an AV1 file so it can be loaded by VideoPlayer. You must also provide a playback framerate.
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/// </summary>
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public VideoAV1(GraphicsDevice device, string filename, double framesPerSecond) : base(device)
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{
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if (!File.Exists(filename))
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{
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throw new ArgumentException("Video file not found!");
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}
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if (Dav1dfile.df_fopen(filename, out var handle) == 0)
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{
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throw new Exception("Failed to open video file!");
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}
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Dav1dfile.df_videoinfo(handle, out width, out height, out pixelLayout);
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Dav1dfile.df_close(handle);
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if (pixelLayout == Dav1dfile.PixelLayout.I420)
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{
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UVWidth = Width / 2;
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UVHeight = Height / 2;
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}
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else if (pixelLayout == Dav1dfile.PixelLayout.I422)
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{
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UVWidth = Width / 2;
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UVHeight = Height;
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}
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else if (pixelLayout == Dav1dfile.PixelLayout.I444)
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{
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UVWidth = width;
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UVHeight = height;
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}
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else
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{
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throw new NotSupportedException("Unrecognized YUV format!");
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}
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FramesPerSecond = framesPerSecond;
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Filename = filename;
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StreamA = new VideoAV1Stream(device, this);
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StreamB = new VideoAV1Stream(device, this);
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}
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// NOTE: if you call this while a VideoPlayer is playing the stream, your program will explode
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protected override void Dispose(bool disposing)
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{
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if (!IsDisposed)
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{
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if (disposing)
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{
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StreamA.Dispose();
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StreamB.Dispose();
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}
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}
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base.Dispose(disposing);
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}
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}
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}
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