client API, lua, ipc: unify event struct return

Both Lua and the JSON IPC code need to convert the mpv_event struct (and
everything it points to) to Lua tables or JSON.

I was getting sick of having to make the same changes to Lua and IPC. Do
what has been done everywhere else, and let the core handle this by
going through mpv_node (which is supposed to serve both Lua tables and
JSON, and potentially other scripting language backends). Expose it as
new libmpv API function.

The new API is still a bit "rough" and support for other event types
might be added in the future.

This silently adds support for the playlist_entry_id fields to both Lua
and JSON IPC.

There is a small API change for Lua; I don't think this matters, so I
didn't care about compatibility. The new code in client.c is mashed up
from the Lua and the IPC code. The manpage additions are moved from the
Lua docs, and made slightly more "general".

Some danger for unintended regressions both in Lua and IPC. Also damn
these node functions suck, expect crashes due to UB.

Not sure why this became more code instead of less compared to before
(according to the diff stat), even though some code duplication across
Lua and IPC was removed. Software development sucks.

1 files changed, 1 insertions, 0 deletions

diff --git a/DOCS/client-api-changes.rst b/DOCS/client-api-changes.rst
index 9a224c9f5b..2ccbc24e76 100644
--- a/DOCS/client-api-changes.rst
+++ b/DOCS/client-api-changes.rst
@@ -35,6 +35,7 @@ API changes
  --- mpv 0.33.0 ---
  1.108  - Deprecate MPV_EVENT_IDLE
         - add mpv_event_start_file, mpv_event_end_file.playlist_entry_id
+        - add mpv_event_to_node()
  1.107  - Remove the deprecated qthelper.hpp. This was obviously not part of the
           libmpv API, only an "additionally" provided helper, thus this is not
           considered an API change. If you are maintaining a project that relies