gramps
8f490102ee
Adds the codec-agnostic decoder half of the media source. Spawns ffmpeg with -f rawvideo -pix_fmt bgra (reusing the already-shipped ffmpeg via IFfmpegLocator) and drains the raw BGRA stdout pipe into VideoFrames. - Services/RawVideoFrameReader.cs: pure rawvideo BGRA stream -> frames (partial reads kept across Feed; no ffmpeg needed to test) - Services/IDecodeProcess.cs + FfmpegDecodeProcess.cs: binary-stdout subprocess seam, mirror of the encoder's IEncoderProcess - Services/MediaVideoSource.cs: owns the decode, raises FrameReady/Completed - MediaVideoSourceTests: 3 pure reader + 1 integration (fake decode process through the real source loop, frames in order) Reference (external scan): ffmpeg rawvideo pipe decode is the canonical codec-agnostic frame feeds pattern (ffmpeg docs -f rawvideo; how OBS/media pipelines push frames to a compositor). Verified: 4/4 tests, build 0 warnings. Native-FPS pacing + resolver/compositor wiring are the next slice.
25 lines
840 B
C#
25 lines
840 B
C#
using System.Diagnostics;
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using System.IO;
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namespace ytLive.Services;
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/// <summary>
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/// TASK 21: seam around the media decoder's subprocess (ffmpeg <c>rawvideo</c>).
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/// Exposes the raw binary stdout (frames) and exit control, so
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/// <see cref="MediaVideoSource"/> never touches <c>System.Diagnostics.Process</c>
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/// directly and tests can fake the whole decode. Mirrors the encoder's
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/// <c>IEncoderProcess</c> but with a binary <see cref="StandardOutput"/>.
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/// </summary>
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public interface IDecodeProcess : IDisposable
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{
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void Start(ProcessStartInfo startInfo);
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/// <summary>Raw binary stdout — the <c>rawvideo</c> BGRA frame bytes.</summary>
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Stream StandardOutput { get; }
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bool HasExited { get; }
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int ExitCode { get; }
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void Kill();
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Task WaitForExitAsync(CancellationToken cancellationToken = default);
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}
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