mirror of
https://github.com/RetroPortingToolKit/psxrecomp
synced 2026-10-26 02:11:36 -04:00
Matthew Stanley
fe42da2744
Keeps both lines: master's PGXP session, draw-distance clamps, masked rejects and saturated-winding NCLIP; the release's render-pass kit additions, verified media/disc extents, timeline/present rings, cull-scale sites. Overlay ABI v30. Co-Authored-By: Claude Opus 5.5 (1M context) <noreply@anthropic.com>
84 lines
3.5 KiB
C
84 lines
3.5 KiB
C
/* netplay_bios_settle.h — which BIOS every peer boots for a netplay match.
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*
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* Each seat offers what it can boot: the bundled OpenBIOS and/or one retail
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* image, named by the CRC-32 of the file it would actually load. The host
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* settles one BIOS for the room from those offers and sends the result to
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* every peer, which then boots only that image.
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*
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* The wire token for retail is still "scph1001" so older peers read it, but it
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* means "the retail image named by retail_crc", not SCPH-1001. Before this rule
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* the token was the whole identity: an SCPH-5552 peer and an SCPH-1001 peer
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* both offered "scph1001", each booted its own dump, and the rollback boot
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* digest never matched.
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*
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* Rule (netplay_bios_settle):
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* 1. Retail is possible only when every seat offered a retail image and all
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* the CRCs are equal. A seat with no offer, no dump, or no CRC (an older
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* client) makes retail impossible.
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* 2. Retail wins when it is possible and the host prefers it, or when nobody
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* prefers OpenBIOS.
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* 3. Otherwise OpenBIOS, when every seat that sent an offer links it. A seat
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* with no offer is an older client and is assumed to link it, as before.
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* 4. Otherwise retail, if it is possible.
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* 5. Otherwise there is no BIOS every seat can boot: the host must not start.
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*/
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#ifndef NETPLAY_BIOS_SETTLE_H
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#define NETPLAY_BIOS_SETTLE_H
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#include <stddef.h>
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#include <stdint.h>
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#ifdef __cplusplus
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extern "C" {
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#endif
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typedef struct NetplayBiosSeat {
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int offered; /* 0 = no offer received (older client / not ready) */
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int can_openbios; /* links the bundled OpenBIOS backend */
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int can_retail; /* has a retail dump a linked backend accepts */
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int prefer_openbios; /* the player picked OpenBIOS */
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uint32_t retail_crc; /* CRC-32 of the retail file it would boot; 0 = not sent */
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int is_host;
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} NetplayBiosSeat;
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enum {
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NETPLAY_BIOS_OPENBIOS = 0,
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NETPLAY_BIOS_RETAIL = 1,
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NETPLAY_BIOS_NONE = 2 /* no BIOS every seat can boot */
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};
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typedef struct NetplayBiosSettle {
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int kind; /* NETPLAY_BIOS_* */
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uint32_t retail_crc; /* RETAIL: the image every seat boots */
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/* NONE: two seats that cannot share a retail image (-1 when unused).
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* seat_b is -1 when seat_a simply has no usable retail offer. */
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int seat_a;
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int seat_b;
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} NetplayBiosSettle;
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NetplayBiosSettle netplay_bios_settle(const NetplayBiosSeat *seats, int count);
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/* Wire token for a settled kind: "openbios", "scph1001" (retail), or "". */
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const char *netplay_bios_token(int kind);
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/* retail_crc on the wire: eight lowercase hex digits, "" for 0. */
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void netplay_bios_format_crc(uint32_t crc, char *out, size_t cap);
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/* Parses eight hex digits (surrounding spaces allowed). Returns 0 for
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* anything else, which callers treat as "not sent". */
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uint32_t netplay_bios_parse_crc(const char *text);
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/* Short player-facing name for a retail image CRC ("SCPH-5552"), or the CRC
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* in hex ("BIOS d786f0b9") when the image is not in psx_bios_known_images.h. */
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void netplay_bios_describe_crc(uint32_t crc, char *out, size_t cap);
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/* One line explaining a NONE result, for the launcher's status line. */
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void netplay_bios_describe_refusal(const NetplayBiosSettle *s,
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const NetplayBiosSeat *seats, int count,
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char *out, size_t cap);
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#ifdef __cplusplus
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}
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#endif
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#endif /* NETPLAY_BIOS_SETTLE_H */
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