OCP-1 — the Virtual Media Player (OVOS Common Playback)

[JarbasAl]

Adds OVOS-OCP-1, a V1 (V0-compatible) specification formalizing the OVOS Virtual Media Player — the central concept of OVOS Common Playback.

The concept

Every media voice command targets one logical player per session. That player:

• arbitrates all media for a session regardless of which provider, backend, or output device serves a track (the media-stack analogue of "one utterance, one handler");
• distinguishes playback requests ("play X") from control requests ("pause", "next", "stop"), so transport control does not require OVOS to have started the media;
• integrates with the host OS over MPRIS in two separable roles — export (OVOS playback appears as a standard org.mpris.MediaPlayer2 controllable by desktop media keys) and control external players (so playback OVOS did not initiate — a browser tab, a desktop player — is still controllable by voice, as long as it speaks the open standard);
• is per-session and isolates state across concurrent sessions.

Scope

Defines the player abstraction + session scoping, the three-axis state model (PlayerState/MediaState/loop+shuffle), the reserved ovos.common_play. bus surface (playback vs. control requests, state reports), the MPRIS bridge (Role A export / Role B external control, the latter off-by-default), the stop relationship (OVOS-STOP-1 subscriber), and a conformance section. It deliberately does not define discovery/ranking (a provider concern), URI-to-bytes playback (a backend concern), or any implementation shape.

Dependencies: OVOS-MSG-1, OVOS-SESSION-1/2, OVOS-PIPELINE-1, OVOS-STOP-1.

One new spec file (ovos-ocp-1.md) + its README index registration.

[coderabbitai]

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ℹ️ Review info

⚙️ Run configuration

Configuration used: defaults

Review profile: CHILL

Plan: Pro

Run ID: 79b62a38-cfbe-4cd6-a009-392cb42dd868

📥 Commits

Reviewing files that changed from the base of the PR and between 0ee6601 and 6bd6f89.

📒 Files selected for processing (3)

• CHANGELOG.md
• README.md
• ocp-1.md

✨ Finishing Touches

🧪 Generate unit tests (beta)

• Create PR with unit tests
• Commit unit tests in branch spec/ovos-ocp-virtual-media-player

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