LlamaCasty

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Author	SHA1	Message	Date
gramps	a2219be198	TASK 21 slice 2b: native-FPS pacing in MediaVideoSource (probe -> delay seam) - MediaVideoSource takes optional IFrameRateProbe? + Func<TimeSpan,CancellationToken,Task>? delay seams (default Task.Delay); probes FPS once in RunAsync, delays by 1/fps after each emitted frame. No probe/unknown fps -> no pacing (ffmpeg pipe backpressure throttles). - Test: MediaVideoSource_PacesFramesByProbedFps (fake probe returns 1000fps + recording delay; one delay per frame ~= 1ms). Media tests 5/5, build 0 warnings. Derivative reference: per-frame delay pacing of decoded output, standard in media playback.	2026-08-31 19:47:38 -07:00
gramps	480ead0fc7	TASK 21 slice 1 step 3: IMediaFrameSource + MediaVideoSourceManager Refactor MediaVideoSource onto IMediaFrameSource (Key/FrameAvailable/Completed/ StartAsync/StopAsync, renaming Start->StartAsync, FrameReady->FrameAvailable), behavior preserved. Add MediaVideoSourceManager: app-wide decode-session owner refcounted by MediaPath with Func<string,IMediaFrameSource?> factory seam, Acquire/Release/ReleaseAll/GetLatestFrame, coalescing each file's frames onto the UI dispatcher onto one shared WriteableBitmap; MediaFailed + PreviewBitmapChanged. Mirrors ScreenCaptureManager (screen-capture session ownership + dispatcher coalescing), per the codebase precedent and derivative-work rule. Tests: MediaVideoSourceManagerTests (5 unit + 1 integration: single shared bitmap, coalesce-to-latest); MediaVideoSourceTests updated for renames. 10/10 media tests pass, build 0 warnings. Docs (TASKS/HANDOFF/ai.md) updated.	2026-08-31 19:22:02 -07:00
gramps	8f490102ee	TASK 21 Increment B: FFmpeg rawvideo video decoder -> VideoFrame 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.	2026-08-31 18:57:29 -07:00

Author

SHA1

Message

Date

gramps

a2219be198

TASK 21 slice 2b: native-FPS pacing in MediaVideoSource (probe -> delay seam)

- MediaVideoSource takes optional IFrameRateProbe? + Func<TimeSpan,CancellationToken,Task>? delay
  seams (default Task.Delay); probes FPS once in RunAsync, delays by 1/fps after each
  emitted frame. No probe/unknown fps -> no pacing (ffmpeg pipe backpressure throttles).
- Test: MediaVideoSource_PacesFramesByProbedFps (fake probe returns 1000fps + recording
  delay; one delay per frame ~= 1ms). Media tests 5/5, build 0 warnings.

Derivative reference: per-frame delay pacing of decoded output, standard in media playback.

2026-08-31 19:47:38 -07:00

gramps

480ead0fc7

TASK 21 slice 1 step 3: IMediaFrameSource + MediaVideoSourceManager

Refactor MediaVideoSource onto IMediaFrameSource (Key/FrameAvailable/Completed/
StartAsync/StopAsync, renaming Start->StartAsync, FrameReady->FrameAvailable),
behavior preserved. Add MediaVideoSourceManager: app-wide decode-session owner
refcounted by MediaPath with Func<string,IMediaFrameSource?> factory seam,
Acquire/Release/ReleaseAll/GetLatestFrame, coalescing each file's frames onto
the UI dispatcher onto one shared WriteableBitmap; MediaFailed + PreviewBitmapChanged.

Mirrors ScreenCaptureManager (screen-capture session ownership + dispatcher
coalescing), per the codebase precedent and derivative-work rule.

Tests: MediaVideoSourceManagerTests (5 unit + 1 integration: single shared
bitmap, coalesce-to-latest); MediaVideoSourceTests updated for renames.
10/10 media tests pass, build 0 warnings. Docs (TASKS/HANDOFF/ai.md) updated.

2026-08-31 19:22:02 -07:00

gramps

8f490102ee

TASK 21 Increment B: FFmpeg rawvideo video decoder -> VideoFrame

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.

2026-08-31 18:57:29 -07:00

3 Commits