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Implement positioned movie playback opcode

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gamer147
2026-07-29 15:41:01 -04:00
parent 71ae1b7c5b
commit 12af952b77
18 changed files with 523 additions and 46 deletions
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vm-map/opcodes.toml
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@@ -6517,7 +6517,7 @@ abi_source = "kelebek+decode-validated"
name = "play-movie-to-surface-at-position"
category = "draw"
summary = "(packed_resource_id)(surface_slot)(movie_flags)(start_delay_ms)(position_ms) - perform the same non-modal movie-to-retained-surface open as opcode 0x236, seek the graph to the requested millisecond position, then arm playback."
details = "The seek is applied through IMediaPosition::put_CurrentPosition before movie_play_configure records the flags and start delay. CALLBACK_LOAD does not restore a separately sampled live playback cursor: the ADV setup path stores opcode 0x23f's stop time in global array 0x329e, and load passes stop_time_ms-1. The shipped use therefore reconstructs the movie layer at its terminal frame after a numbered load. The portable FFmpeg seam currently has no initial-position parameter; implementation requires a pre-play seek with keyframe-preroll discard and matching audio positioning, then can reuse the existing 0x236 surface binding, routing, completion, and delayed-start lifecycle."
details = "The seek is applied through IMediaPosition::put_CurrentPosition before movie_play_configure records the flags and start delay. CALLBACK_LOAD does not restore a separately sampled live playback cursor: the ADV setup path stores opcode 0x23f's stop time in global array 0x329e, and load passes stop_time_ms-1. The shipped use therefore reconstructs the movie layer at its terminal frame after a numbered load. Port status (2026-07-29): implemented through the existing 0x236 surface binding, routing, and completion lifecycle. FFmpeg ABI v3 seeks its independent video and audio demuxers before worker start; managed preroll selects the video frame active at the requested position (retaining the last frame at stop_time_ms-1), trims audio to the same point, and rebases both remaining timelines to playback time zero. Negative positions clamp to zero and positions at or beyond the graph stop clamp to stop_time_ms-1."
noop_headless = false
source = "investigation"
confidence = "high"