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===Potential roadblocks===Due to the PS4's [[POS_(Pong_Consoles)_CPUs_and_Other_Chips#x86_CPUs|x86 architecture ]] and FreeBSD-based operating system, emulators for the device will, by and large, be very unconventional. Despite the x86's instruction set being huge<ref>{{cite web | url= https://en.wikipedia.org/wiki/x86_instruction_listings | title= x86 instruction listings | Wikipedia}}</ref>, a trait that would typically lead to years of development time by emulators, it opens the ability for pre-existing hypervisors to do the heavy lifting, eliminating the need for a recompiler. There is also, as of this time, little to no documentation on the GPU (a modified Radeon 7970M with disabled stream processors) used in the PS4's APU, and it will require a complete re-implementation by emulator developers. In recent years many [https://www.playstation.com/en-us/games/pc-games/ PlayStation 4 (Pro) exclusive titles are now being ported to PC] with [[#Enhancements|enhancements]], so similar to [[PlayStation_5_emulators#Emulation_issues|PlayStation 5]], [[Xbox One emulators#Emulation issues|Xbox One (X|S)]] and [[Xbox_Series_X_and_Series_S#Emulation issues|Xbox Series X|S]] situations this '''could''' lead to a decreased interest in development. Having said that, there are still considerable amount of games exclusive to those consoles, this includes games for both PlayStation 4 (Pro) and Xbox One (X|S) that haven't been ported and titles lacking enhanced/next-gen update for PC. See [[List of notable ports#External_links]] section for all of those games.
→Compatibility layers (...)
==Emulators==
<div style="overflow-x:auto;width:100%">{| class="wikitable" style="text-align:center;width:100%"
! scope="col"|Name
! scope="col"|Platform(s)
| N/A
| {{✓}}
| {{~✓}}
| {{✗}}
|-
| {{✗}}
|}
</div>
==Compatibility layers [[Compatibility layers|(...)]]==
<div style="overflow-x:auto;width:100%">{| class="wikitable" style="text-align:center;width:100%"
! scope="col"|Name
! scope="col"|Platform(s)
| {{✗}}
| {{✗}}
| [https://fpps4.net/compatibility/ 6%<br/><small>104 106 out of 1758 1780 reported titles</small>]
| {{✓}}
| {{✓}}
| [https://github.com/SysRay/psOff_public psOff]
| align=left|{{Icon|Windows}}
| [https://github.com/SysRay/psOff_public/releases git{{psOffVer}}]
| {{✗}}
| {{✗}}
| {{✗}}
|-
| [[KytyGPCS4]]
| align=left|{{Icon|Windows}}
| [https://github.com/InoriRusInori/Kyty/releases GPCS4 {{KytyVerGPCS4Ver}}]
| {{✗}}
| {{✗}}
| {{✗}}
| N<small>[[GPCS4|2 playable titles]]</Asmall>
| {{✓}}
| {{✗?}}
| {{✗}}
|-
| [[GPCS4Kyty]]
| align=left|{{Icon|Windows}}
| [https://github.com/InoriInoriRus/GPCS4 Kyty/releases {{GPCS4VerKytyVer}}]
| {{✗}}
| {{✗}}
| {{✗}}
| ?<small>[[Kyty|2 playable titles]]</small>
| {{✓}}
| {{✗}}
| {{✗}}
|}
</div>
==Native==
<div style="overflow-x:auto;width:100%">{| class="wikitable" style="text-align:center;width:100%"
! scope="col"|Name
! scope="col"|Latest Version
| {{✓}}
|}
</div>
==Comparisons==
:; [[Orbital]]
:: An open-source low-level emulator based on [[QEMU]]by Alexandro Sanchez (AKA 'AlexAltea', [https://youtu.be/4joCMfTPP4M?t=30 who is also one of the developers of the RPCS3 and Nucleus projects]), Orbital uses Intel HAXM to speed up performance. A surprising amount of progress has been made for an emulator of its kind, having to emulate the kernel used by the PS4; It's stuck at the console's Safe Mode<ref>https://www.youtube.com/watch?v=IBBHisNM74o</ref> and, thus, can't boot any games.
:; psuv
:: Yet another compatibility layer. Developer solely focused on the rendering part and recently started to implement the system functions to run some binaries. It renders decently fast, the planned changes will make it almost perfect. It currently doesn't support: multiple command buffer submits, for loops in shader, missing opcodes.[https://github.com/SysRay/psOff_public?tab=readme-ov-file#description]
:; [[Kyty]]
:: A compatibility layer for the PS4 and PS5 made by InoriRus, the creator of Short Waves. It's in the early stages of development. It can boot commercial games such as ''Blackhole'', ''Worms W.M.D'', and some PS5 homebrews with 0.2.0. This is also the first-ever PlayStation 4 emulator with a GUI, and like GPCS4, the emulator is Windows-exclusive.
:; [[GPCS4]]
:: A compatibility layer for the PlayStation 4. It can show the logos in [https://en.wikipedia.org/wiki/Nier:_Automata ''Nier: Automata''] and ran its first commercial games, ''We Are Doomed'' and [https://en.wikipedia.org/wiki/Sonic_Mania ''Sonic Mania''], in February 2020. It can only run homebrew tests as of June 2022. Furthermore, it appears to be only a side project to test 3D graphics and may or may not become anything serious, but this is unknown as the project's development has halted. As of June 2022, GPCS4 is now a one-person project.
;Native
:; PlayStation 5
:: Placeholder textThe PlayStation 5 boasts extensive backwards compatibility with a vast library of PlayStation 4 titles. [[PlayStation_5_emulators#Hardware_features_and_peripherals|This functionality]] allows users to play the overwhelming majority of physical PS4 discs and digital games downloaded through the PlayStation Store directly on their PS5 console. Additionally, some PS4 games may benefit from [[#Enhancements|enhancements]] on the PS5 hardware (similar to PlayStation 4 Pro) if it supports "Game Boost" option, such as experiencing higher or more stable frame rates.
==Enhancements==
<div style="overflow-x:auto;width:100%">{|class="wikitable" style="text-align:center; vertical-align:middle;width:100%"
|- style="font-weight:bold;"
! colspan=2 | Name
| {{N}}
|-
| Ray-tracing<br/><small>([https://devblogs.microsoft.com/directx/announcing-microsoft-directx-raytracing/ DXR], [https://www.khronos.org/blog/ray-tracing-in-vulkan VRT] and [https://developer.apple.com/documentation/metal/metal_sample_code_library/accelerating_ray_tracing_using_metal MRT])</small>
| colspan=3 | <small>Implementing ray-tracing in an emulator is unfortunately quite challenging and unlikely to be feasible in the near future.<br/>However you can try "[[Shaders_and_filters#Notable_ReShade_shaders|Screen-Space Ray Traced Global Illumination]]" shader using ReShade.</small>
|-
| {{?}}
|-
| Super-resolution techniques<br/><small>([https://github.com/NVIDIAGameWorks/Streamline/blob/main/docs/ProgrammingGuideDLSS.md DLSS], XeSS and [[Wikipedia:GPUOpen#FidelityFX_Super_Resolution|FSR 2+]])</small>
| colspan=3 | <small>Requires access to the depth buffer and temporal data like motion-vectors so it's quite challenging and unlikely to be feasible in the near future.</small>
|-
| colspan=4 | <small>While most emulators offer frame pacing or framebuffer latency control options, implementing rendering latency reduction technologies isn't currently feasible. This is '''likely''' doesn't offer enough benefit to justify the development effort.</small>
|-
| rowspan=4 6 | Post-Processing
| [[Wikipedia:Category:Anti-aliasing_algorithms|Post-rendering AA]]<br/><small>(FXAA, TXAA and MLAA/SMAA)</small>
| {{N}}
| {{?}}
|-
| [[Wikipedia:Comparison_gallery_of_image_scaling_algorithms|Post-rendering scaling]]<br/><small>(Sharp bilinear, Lanczos and [[Wikipedia:GPUOpen#FidelityFX_Super_Resolution|FSR 1]])</small>
| {{N}}
| {{N}}
| {{?}}
|-
| [[Shaders_and_filters|Filters]]<br/><small>[[Shaders_and_filters#NTSC_Filters|NTSC filters]], [[Shaders_and_filters#Tonemapping|HDR tonemapping]] etc.</small>{{N}}
| {{N}}
| {{N}}
|-
|[[Shaders_and_filters#AI-powered filters|AI-powered filter compatible]]<br/><small>([https://www.nvidia.com/en-us/geforce/news/gfecnt/nvidia-freestyle-ansel-enhancements-geforce-experience-article/ Freestyle])</small>
| {{?}}
| {{?}}
| {{N}}
|-
| {{N}}
| {{N}}
|-
|[[High_dynamic_range#Inverse_tone_mapping|Inverse tone mapping compatible]]
| colspan=3 | <small>PlayStation 4 (Pro) system already supports HDR in some games.</small>
|-
| rowspan=5 | [https://tasvideos.org/Emulatorresources/Features TAS features]
|-
| [[Virtual_reality#VR_game_room_simulations|EmuVR support]]
| colspan=3 | <small>Exclusive to [https://www.emuvr.net/wiki/Installation_Guide#Downloads libretro cores]. So there is no support at the moment.</small>
|-
| Free Look<br/><small>Free Look is a enhancement feature that allows manipulation of the in-game camera.</small>
| {{N}}
|}
</div>
<references group=N2/>
==Hardware features and peripherals==
<div style="overflow-x:auto;width:100%">{|class="wikitable" style="text-align:center; vertical-align:middle;width:100%"
|- style="font-weight:bold;"
! colspan=2 | Name
| {{Y}}
|}
</div>
===PlayStation Dynamic Menu and apps===
*See [[Home_Media_Player#Emulators|this dedicated page]] for more information about home media playback support for emulation softwares.
*See [[Ripping_games]].
*Also see [https://www.psdevwiki.com/ps4/Backwards_Compatibility#multimedia psdevwiki: multimedia support]
==Emulation issues==
===PCSX4 & fake emulators===
