# ADR-0006: Phase-1 VideoOut experiment stays behind SDL2

- Status: accepted
- Date: 2026-07-17

## Context

The public SDK v0.41 exports VideoOut stubs but supplies no official VideoOut
headers. The pinned PS5 SDL2 fork contains a working framebuffer route, but its
backend declares opaque layouts with fields named `junk`. Those declarations
are public source evidence of the upstream implementation, not a sufficiently
proven ABI for duplication in `chimera-gfx`.

## Decision

The first presentation candidate calls only public SDL2 APIs. A reviewed
Zlib-licensed build overlay removes SDL's unrelated keyboard/IME initialization
from this candidate. Project code does not copy a VideoOut prototype or data
layout. The target is disabled by default, requires the PS5 toolchain and an
explicit SDL build path, and embeds the same `NONE` firmware gate as the probe.

The candidate does not link SDL2main because that wrapper hides the splash
screen before application-level firmware validation.

## Consequences

The upstream SDL backend remains the owner of VideoOut, direct memory, tiling,
flip, and cleanup. Its unbounded flip wait is a known hardware-test blocker;
successful offline compilation is not runtime approval or ABI proof.