54c0a3c874
640e6cace fix(toxav): remove extra copy of video frame on encode Tested and works, but there might be alignment issues and other stuff. 6f7f51554 chore(toxav): use realtime deadline for vp8 encoder Technically all this does is choose a quality based on frame duration, which we always set to 1, and as such is always realtime. (In same timebase as pts, which we use as a frame counter...) 5047ae5a2 chore: make the source tarball exhibit the old behavior 14804a4b8 chore: Fix sonar-scan CI action. e2db7d946 cleanup: Exclude lan_discovery test from running on macos, instead of excluding it from the project. 3accade67 chore: Fix CI, disabling some tests that no longer run on CI. ef8d767e6 cleanup: Fix comment formatting errors. 34ec822da cleanup: Fix some clang-19 format warnings. 40b3f0b46 refactor: Use clang's nullability qualifiers instead of attributes. f81e30679 refactor: Use per-parameter nullability annotations. REVERT: 1701691d5 chore(toxav): use realtime deadline for vp8 encoder Technically all this does is choose a quality based on frame duration, which we always set to 1, and as such is always realtime. (In same timebase as pts, which we use as a frame counter...) REVERT: a87505867 fix(toxav): remove extra copy of video frame on encode Tested and works, but there might be alignment issues and other stuff. git-subtree-dir: external/toxcore/c-toxcore git-subtree-split: 640e6cace81b4412c45977b94eb9c41e53c54035
96 lines
3.8 KiB
C
96 lines
3.8 KiB
C
/* SPDX-License-Identifier: GPL-3.0-or-later
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* Copyright © 2016-2020 The TokTok team.
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* Copyright © 2014 Tox project.
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*/
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#ifndef C_TOXCORE_TOXCORE_MONO_TIME_H
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#define C_TOXCORE_TOXCORE_MONO_TIME_H
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#include <stdbool.h>
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#include <stdint.h>
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#include "attributes.h"
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#include "mem.h"
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#ifdef __cplusplus
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extern "C" {
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#endif
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/**
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* The timer portion of the toxcore event loop.
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*
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* We update the time exactly once per tox_iterate call. Programs built on lower
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* level APIs such as the DHT bootstrap node must update the time manually in
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* each iteration.
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*
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* Time is kept per Tox instance, not globally, even though "time" as a concept
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* is global. This is because by definition `mono_time` represents the time at
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* the start of an iteration, and also by definition the time when all network
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* events for the current iteration occurred. This affects mainly two situations:
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*
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* 1. Two timers started in the same iteration: e.g. two timers set to expire in
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* 10 seconds will both expire at the same time, i.e. about 10 seconds later.
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* If the time were global, `mono_time` would be a random number that is
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* either the time at the start of an iteration, or 1 second later (since the
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* timer resolution is 1 second). This can happen when one update happens at
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* e.g. 10:00:00.995 and a few milliseconds later a concurrently running
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* instance updates the time at 10:00:01.005, making one timer expire a
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* second after the other.
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* 2. One timer based on an event: if we want to encode a behaviour of a timer
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* expiring e.g. 10 seconds after a network event occurred, we simply start a
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* timer in the event handler. If a concurrent instance updates the time
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* underneath us, it may instead expire 9 seconds after the event.
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*
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* Both these situations cause incorrect behaviour randomly. In practice,
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* toxcore is somewhat robust against strange timer behaviour, but the
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* implementation should at least theoretically match the specification.
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*/
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typedef struct Mono_Time Mono_Time;
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typedef uint64_t mono_time_current_time_cb(void *_Nullable user_data);
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Mono_Time *_Nullable mono_time_new(const Memory *_Nonnull mem, mono_time_current_time_cb *_Nullable current_time_callback, void *_Nullable user_data);
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void mono_time_free(const Memory *_Nonnull mem, Mono_Time *_Nullable mono_time);
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/**
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* Update mono_time; subsequent calls to mono_time_get or mono_time_is_timeout
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* will use the time at the call to mono_time_update.
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*/
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void mono_time_update(Mono_Time *_Nonnull mono_time);
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/** @brief Return current monotonic time in milliseconds (ms).
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*
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* The starting point is UNIX epoch as measured by `time()` in `mono_time_new()`.
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*/
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uint64_t mono_time_get_ms(const Mono_Time *_Nonnull mono_time);
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/** @brief Return a monotonically increasing time in seconds.
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*
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* The starting point is UNIX epoch as measured by `time()` in `mono_time_new()`.
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*/
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uint64_t mono_time_get(const Mono_Time *_Nonnull mono_time);
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/**
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* Return true iff timestamp is at least timeout seconds in the past.
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*/
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bool mono_time_is_timeout(const Mono_Time *_Nonnull mono_time, uint64_t timestamp, uint64_t timeout);
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/** @brief Return current monotonic time in milliseconds (ms).
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*
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* The starting point is unspecified and in particular is likely not comparable
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* to the return value of `mono_time_get_ms()`.
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*/
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uint64_t current_time_monotonic(const Mono_Time *_Nonnull mono_time);
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/**
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* Override implementation of `current_time_monotonic()` (for tests).
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*
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* The caller is obligated to ensure that `current_time_monotonic()` continues
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* to increase monotonically.
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*/
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void mono_time_set_current_time_callback(Mono_Time *_Nonnull mono_time,
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mono_time_current_time_cb *_Nullable current_time_callback, void *_Nullable user_data);
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#ifdef __cplusplus
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} /* extern "C" */
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#endif
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#endif /* C_TOXCORE_TOXCORE_MONO_TIME_H */
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