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* test(e2e): explain black canvases in the packaged frame-copy smoke When the smoke's canvas stays black, print and attach the session snapshot (with mpv's drop counter), every slot of the helper's shared-memory frame rings read from /dev/shm, and the session's verbose mpv log (log-file). Together they separate these cases: the helper never published a frame, mpv rendered black, or the preload pump did not draw a real frame. Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com> * fix(playback): stop random black frames on software GL in frame-copy mpv's LUT scalers (the default lanczos/spline family) build their weight texture from an uninitialized talloc_array: mp_compute_lut fills only kernel->size of every stride floats, so each row's padding is heap garbage (reinit_scaler in video/out/gpu/video.c, mpv 0.41 and master). The LUT is an rgba16f texture sampled with linear filtering. When the padding holds NaN, or a value large enough to become Inf as half-float, Mesa's llvmpipe carries it through the zero-weight neighbour texel, the weights become NaN and the frame clamps to pure black. Whether it happens depends on heap contents, so the packaged smoke's paused frame was black in most attempts on the CI runner. Evidence from CI (8 repeats each, no retries): baseline 2/8 passed; LUT-free bilinear scalers 8/8; gpu-dumb-mode 8/8; LP_NUM_THREADS=1 6/8. A synchronous glReadPixels right after mpv_render_context_render() showed the black frame already in the helper's FBO. The readback, the shared-memory ring and the preload pump were correct. On a CPU rasterizer the helper now selects mpv's LUT-free bilinear scalers and disables sigmoid upscaling. Software GL cannot afford the LUT scalers anyway. A session option for the same key still wins. Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com> * fix(playback): report software scaler results and scope smoke ring diagnostics The software-renderer fallback now reports which scaler options mpv accepted and which it rejected (with mpv's error), instead of always printing success. The smoke's black-canvas diagnostics read only the failed session's rings (<sessionId>-g<N>), not every impv-fc ring in /dev/shm. Addresses Greptile review feedback. Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com> --------- Co-authored-by: 4gray <fourgray@proton.me> Co-authored-by: Claude Opus 5.5 <noreply@anthropic.com>
229 B
229 B
type, area
| type | area |
|---|---|
| fix | playback |
The experimental Embedded MPV frame-copy engine no longer shows a black picture at random on computers that render graphics in software (for example without GPU drivers or in a virtual machine).