forked from MoonsideGames/MoonWorks
Theora video support + audio improvements (#20)
- `SoundInstance.Play` no longer takes a loop parameter - `SoundInstance.Stop` is split into `Stop` and `StopImmediate` instead of taking an immediate parameter - Added `StreamingSoundSeekable` to better support streaming audio that does not support seek - `StreamingSound` no longer has a Loop property, but `StreamingSoundSeekable` does - abstract `StreamingSound.AddBuffer` renamed to `FillBuffer` - `FillBuffer` is now provided with a native buffer to avoid an extra data copy - `StreamingSound` buffer implementation optimized to avoid repeated alloc/frees - added `Video` class which can load and play Theora (.ogv) streaming video/audio Reviewed-on: MoonsideGames/MoonWorks#20main
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Subproject commit dd8c7fa69e678b6182cdaa71458ad08dd31c65da
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namespace MoonWorks.Audio
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{
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public abstract class StreamingSoundSeekable : StreamingSound
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{
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public bool Loop { get; set; }
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protected StreamingSoundSeekable(AudioDevice device, ushort formatTag, ushort bitsPerSample, ushort blockAlign, ushort channels, uint samplesPerSecond) : base(device, formatTag, bitsPerSample, blockAlign, channels, samplesPerSecond)
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{
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}
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public abstract void Seek(uint sampleFrame);
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protected override void OnReachedEnd()
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{
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if (Loop)
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{
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Seek(0);
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}
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else
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{
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Stop();
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}
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}
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}
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}
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#version 450
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layout(location = 0) out vec2 outTexCoord;
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void main()
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{
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outTexCoord = vec2((gl_VertexIndex << 1) & 2, gl_VertexIndex & 2);
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gl_Position = vec4(outTexCoord * 2.0 - 1.0, 0.0, 1.0);
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}
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/*
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* This effect is based on the YUV-to-RGBA GLSL shader found in SDL.
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* Thus, it also released under the zlib license:
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* http://libsdl.org/license.php
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*/
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#version 450
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layout(location = 0) in vec2 TexCoord;
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layout(location = 0) out vec4 FragColor;
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layout(binding = 0, set = 1) uniform sampler2D YSampler;
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layout(binding = 1, set = 1) uniform sampler2D USampler;
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layout(binding = 2, set = 1) uniform sampler2D VSampler;
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/* More info about colorspace conversion:
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* http://www.equasys.de/colorconversion.html
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* http://www.equasys.de/colorformat.html
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*/
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const vec3 offset = vec3(-0.0625, -0.5, -0.5);
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const vec3 Rcoeff = vec3(1.164, 0.000, 1.793);
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const vec3 Gcoeff = vec3(1.164, -0.213, -0.533);
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const vec3 Bcoeff = vec3(1.164, 2.112, 0.000);
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void main()
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{
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vec3 yuv;
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yuv.x = texture(YSampler, TexCoord).r;
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yuv.y = texture(USampler, TexCoord).r;
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yuv.z = texture(VSampler, TexCoord).r;
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yuv += offset;
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FragColor.r = dot(yuv, Rcoeff);
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FragColor.g = dot(yuv, Gcoeff);
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FragColor.b = dot(yuv, Bcoeff);
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FragColor.a = 1.0;
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}
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/* Heavily based on https://github.com/FNA-XNA/FNA/blob/master/src/Media/Xiph/VideoPlayer.cs */
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using System;
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using System.Diagnostics;
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using System.Runtime.InteropServices;
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using MoonWorks.Audio;
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using MoonWorks.Graphics;
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namespace MoonWorks.Video
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{
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public enum VideoState
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{
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Playing,
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Paused,
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Stopped
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}
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public unsafe class Video : IDisposable
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{
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internal IntPtr Handle;
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public bool Loop { get; private set; }
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public float Volume {
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get => volume;
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set
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{
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volume = value;
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if (audioStream != null)
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{
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audioStream.Volume = value;
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}
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}
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}
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public float PlaybackSpeed { get; set; }
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public double FramesPerSecond => fps;
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private VideoState State = VideoState.Stopped;
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private double fps;
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private int yWidth;
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private int yHeight;
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private int uvWidth;
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private int uvHeight;
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private void* yuvData = null;
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private int yuvDataLength;
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private int currentFrame;
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private GraphicsDevice GraphicsDevice;
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private Texture RenderTexture = null;
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private Texture yTexture = null;
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private Texture uTexture = null;
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private Texture vTexture = null;
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private Sampler LinearSampler;
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private AudioDevice AudioDevice = null;
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private StreamingSoundTheora audioStream = null;
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private float volume = 1.0f;
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private Stopwatch timer;
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private double lastTimestamp;
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private double timeElapsed;
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private bool disposed;
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/* TODO: is there some way for us to load the data into memory? */
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public Video(GraphicsDevice graphicsDevice, AudioDevice audioDevice, string filename)
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{
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GraphicsDevice = graphicsDevice;
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AudioDevice = audioDevice;
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if (!System.IO.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 (Theorafile.tf_fopen(filename, out Handle) < 0)
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{
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throw new ArgumentException("Invalid video file!");
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}
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Theorafile.th_pixel_fmt format;
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Theorafile.tf_videoinfo(
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Handle,
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out yWidth,
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out yHeight,
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out fps,
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out format
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);
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if (format == Theorafile.th_pixel_fmt.TH_PF_420)
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{
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uvWidth = yWidth / 2;
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uvHeight = yHeight / 2;
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}
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else if (format == Theorafile.th_pixel_fmt.TH_PF_422)
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{
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uvWidth = yWidth / 2;
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uvHeight = yHeight;
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}
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else if (format == Theorafile.th_pixel_fmt.TH_PF_444)
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{
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uvWidth = yWidth;
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uvHeight = yHeight;
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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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yuvDataLength = (
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(yWidth * yHeight) +
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(uvWidth * uvHeight * 2)
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);
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yuvData = NativeMemory.Alloc((nuint) yuvDataLength);
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InitializeTheoraStream();
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if (Theorafile.tf_hasvideo(Handle) == 1)
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{
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RenderTexture = Texture.CreateTexture2D(
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GraphicsDevice,
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(uint) yWidth,
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(uint) yHeight,
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TextureFormat.R8G8B8A8,
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TextureUsageFlags.ColorTarget | TextureUsageFlags.Sampler
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);
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yTexture = Texture.CreateTexture2D(
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GraphicsDevice,
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(uint) yWidth,
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(uint) yHeight,
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TextureFormat.R8,
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TextureUsageFlags.Sampler
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);
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uTexture = Texture.CreateTexture2D(
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GraphicsDevice,
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(uint) uvWidth,
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(uint) uvHeight,
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TextureFormat.R8,
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TextureUsageFlags.Sampler
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);
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vTexture = Texture.CreateTexture2D(
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GraphicsDevice,
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(uint) uvWidth,
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(uint) uvHeight,
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TextureFormat.R8,
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TextureUsageFlags.Sampler
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);
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LinearSampler = new Sampler(GraphicsDevice, SamplerCreateInfo.LinearClamp);
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}
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timer = new Stopwatch();
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}
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public void Play(bool loop = false)
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{
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if (State == VideoState.Playing)
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{
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return;
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}
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Loop = loop;
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timer.Start();
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if (audioStream != null)
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{
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audioStream.Play();
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}
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State = VideoState.Playing;
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}
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public void Pause()
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{
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if (State != VideoState.Playing)
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{
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return;
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}
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timer.Stop();
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if (audioStream != null)
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{
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audioStream.Pause();
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}
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State = VideoState.Paused;
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}
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public void Stop()
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{
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if (State == VideoState.Stopped)
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{
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return;
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}
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timer.Stop();
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timer.Reset();
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Theorafile.tf_reset(Handle);
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lastTimestamp = 0;
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timeElapsed = 0;
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if (audioStream != null)
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{
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audioStream.StopImmediate();
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audioStream.Dispose();
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audioStream = null;
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}
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State = VideoState.Stopped;
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}
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public Texture GetTexture()
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{
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if (RenderTexture == null)
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{
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throw new InvalidOperationException();
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}
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if (State == VideoState.Stopped)
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{
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return RenderTexture;
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}
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timeElapsed += (timer.Elapsed.TotalMilliseconds - lastTimestamp) * PlaybackSpeed;
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lastTimestamp = timer.Elapsed.TotalMilliseconds;
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int thisFrame = ((int) (timeElapsed / (1000.0 / FramesPerSecond)));
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if (thisFrame > currentFrame)
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{
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if (Theorafile.tf_readvideo(
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Handle,
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(IntPtr) yuvData,
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thisFrame - currentFrame
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) == 1 || currentFrame == -1) {
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UpdateTexture();
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}
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currentFrame = thisFrame;
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}
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bool ended = Theorafile.tf_eos(Handle) == 1;
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if (ended)
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{
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timer.Stop();
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timer.Reset();
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if (audioStream != null)
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{
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audioStream.Stop();
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audioStream.Dispose();
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audioStream = null;
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}
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Theorafile.tf_reset(Handle);
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if (Loop)
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{
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// Start over!
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InitializeTheoraStream();
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timer.Start();
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}
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else
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{
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State = VideoState.Stopped;
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}
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}
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return RenderTexture;
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}
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private void UpdateTexture()
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{
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var commandBuffer = GraphicsDevice.AcquireCommandBuffer();
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commandBuffer.SetTextureDataYUV(
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yTexture,
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uTexture,
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vTexture,
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(IntPtr) yuvData,
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(uint) yuvDataLength
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);
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commandBuffer.BeginRenderPass(
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new ColorAttachmentInfo(RenderTexture, Color.Black)
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);
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commandBuffer.BindGraphicsPipeline(GraphicsDevice.VideoPipeline);
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commandBuffer.BindFragmentSamplers(
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new TextureSamplerBinding(yTexture, LinearSampler),
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new TextureSamplerBinding(uTexture, LinearSampler),
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new TextureSamplerBinding(vTexture, LinearSampler)
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);
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commandBuffer.DrawPrimitives(0, 1, 0, 0);
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commandBuffer.EndRenderPass();
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GraphicsDevice.Submit(commandBuffer);
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}
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private void InitializeTheoraStream()
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{
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// Grab the first video frame ASAP.
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while (Theorafile.tf_readvideo(Handle, (IntPtr) yuvData, 1) == 0);
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// Grab the first bit of audio. We're trying to start the decoding ASAP.
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if (AudioDevice != null && Theorafile.tf_hasaudio(Handle) == 1)
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{
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int channels, sampleRate;
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Theorafile.tf_audioinfo(Handle, out channels, out sampleRate);
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audioStream = new StreamingSoundTheora(AudioDevice, Handle, channels, (uint) sampleRate);
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}
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currentFrame = -1;
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}
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protected virtual void Dispose(bool disposing)
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{
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if (!disposed)
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{
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if (disposing)
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{
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// dispose managed state (managed objects)
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RenderTexture.Dispose();
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yTexture.Dispose();
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uTexture.Dispose();
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vTexture.Dispose();
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}
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// free unmanaged resources (unmanaged objects)
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Theorafile.tf_close(ref Handle);
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NativeMemory.Free(yuvData);
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disposed = true;
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}
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}
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~Video()
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{
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// Do not change this code. Put cleanup code in 'Dispose(bool disposing)' method
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Dispose(disposing: false);
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}
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public void Dispose()
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{
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// Do not change this code. Put cleanup code in 'Dispose(bool disposing)' method
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Dispose(disposing: true);
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GC.SuppressFinalize(this);
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}
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}
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}
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