* Some slight fixes
* Update libretro.h
* Log calls to RETRO_ENVIRONMENT_GET_MICROPHONE_INTERFACE
* Finish proof-of-concept for mic support
- It works, but doesn't support floating-point audio yet
- It may need to be resampled, too
* Add macros that aren't available in SDL 2
* Comment out a variable definition for now
- For C89 compliance
* Add some comments for clarity
* Let ALSA tolerate a null new_rate
* Partial ALSA microphone support
- Not yet tested
- Mic is created and destroyed
- Mic can also be paused or unpaused
- Mic is paused or unpaused with the rest of the driver
- Microphone is not yet read
* Install error logging in the ALSA driver
- It defers to RARCH_ERR
* Free the ALSA microphone in alsa_free
* Fix an indent
* First draft of alsa_read_microphone
* Deinitialize SDL Audio in sdl_audio_free
* Save and restore the ALSA error logger
- You should always practice safe global state
* Add newlines to some RARCH_ERRs
* Add some logging
* Check for the mic being active via settings instead of via flags
* Adjusted a log entry to be less misleading
- A frequency of 0Hz looks weird to the uninformed
- In reality, it means the driver used the requested frequency
* Fix an incorrect format string
* Tidy up logging in alsa.c
* Rename audio_enable_microphone to audio_enable_input
* Rename microphone_device to audio_input_device
* Add audio_input_latency and audio_input_block_frames settings
* Add all mic-related settings to the options menu
* Adjust logging for alsa.c
- Log the ALSA library version
- Add errno details
* Refer to the microphone in logs by name
* Use %u instead of %d for some log items
* Add input_samples_buf
* Remove an inaccurate comment
* Change type of input_samples_buf
* Clean up audio_driver_flush_microphone_input
* Comment convert_float_to_s16
- It helped me understand what it's doing
- Turns out it'll work just fine on mono audio
* Don't use the resampler for mic input
* Fix crash in the ALSA driver when reading from a mic
* Update some logging messages
* ALSA support now works for mics
* Reuse some common functions in alsa.c
* Add alsa_thread_microphone_t
* Refactor alsa.c
- Introduce alsa_init_pcm to init any PCM that we're using
- Vastly simplifies the implementation of alsa_init and alsa_init_microphone
- Will be used for the read-based versions next
* Make ALSA logging a little more consistent
* Clean up the mic with alsa_free_microphone if alsa_init_microphone fails
* Remove an unused function
* Move some cleanup in alsa.c to a common function
* First crack at mic support for alsathread
- Refactor some duplicate code into functions
- Use functions introduced in alsa.c
- Create and destroy the mic
* Slight cleanups for clarity
* Implement alsa_thread_set/get_microphone_state
* More work on alsathread
- No more crashing, but the mic just returns silence
* Slight cleanups for clarity
* Add alsa_set_mic_enabled_internal
- For setting the state of a microphone while considering its current state
* Use alsa_set_mic_enabled_internal
* Log a little more info
* Log when the audio driver is started/stopped
* Move base microphone driver code into a new directory
- Add microphone_driver.c to Makefile.common
- Rename functions as needed
* Initialize and deinitialize the microphone driver
* Implement sdl_microphone.c
* Un-const an argument
- In case the driver context needs to do any locking
* Revise comments for microphone_driver.h
* Remove an unimplemented function
* Remove some functions from the mic driver
* Remove mic functions from audio_thread_wrapper
* Remove mic functions from sdl_audio
* Fix microphone_null
* Split the mic code for the alsa audio drivers into microphone drivers
* Fix an extra struct member
* Add a setting for the mic driver
* Add a command to reinitialize the microphone driver
* Rename mic-related settings
* Add DRIVER_MICROPHONE_MASK to DRIVERS_CMD_ALL
* Rename audio_enable_input to microphone_enable
* Remove some labels from qt_options
* Search for microphone_driver within find_driver_nonempty
* Clean up some mic driver code
* Pending mics now return silence
* Adjust some logging and comments
* Some cleanup in the microphone driver
* Invert a flag check
- Oops
* Fix a log message
* Fix the wrong flags being checked
* Slight refactor of wasapi_init_device
- Add a data_flow parameter
- Declare it in a header
- In preparation for WASAPI mic support
* Add some WASAPI macros for _IAudioCaptureClient
* Move some common WASAPI functions to audio/common/wasapi.c
- They'll be used by the mic and the audio drivers
* Add wasapi_log_hr
* Generalize mmdevice_list_new to look for capture devices, too
* Fix a function declaration
* Move driver-specific device_list_new functions into their respective files
* Clean up some declarations
* First draft of wasapi microphone driver
* Add wasapi_microphone_device_list_free
* Change function parameter names to be consistent with microphone_driver
* Partially implement wasapi_microphone_read
- Mostly copied from the audio driver so far
- It doesn't compile yet
- But it'll be beautiful when I'm done with it
* Refactor the mic driver's functions
- Rename get_mic_active to mic_alive
- Split set_mic_active into start_mic and stop_mic
- Refactor the SDL mic driver accordingly
* Edit some WASAPI functions for logging and clarity
* Implement more of the WASAPI mic driver
* Rename write_event to read_event
* Pass the WASAPI driver context to the various read functions
* Mostly implement the read function for the WASAPI mic driver
* Fix a crash in microphone_driver
- Forgot to move the position of the name of null_driver
* Reduce some logging in wasapi common functions
- Only log the chosen audio client format, not all attempted ones
* Add some macro wrappers for IAudioClient methods
* Update mic driver configuration
- Make the mic driver configurable in the menu
- Add config items for WASAPI-related options similar to the audio driver
* Fix a menu entry scrolling through audio devices instead of mic devices
* Add some utility functions
* Expose the new utility functions in wasapi.h
* Add extra logging in the WASAPI common functions
* Add sharemode_name
* Use _IAudioClient_Initialize macro in some places
* Pass channels to wasapi_init_client
- Remember, mics are in mono
* Use _IAudioClient_Initialize macro some more
* Forgot to pass channels in some places
* Add some utility functions
* Forgot an #include
* Add wasapi_select_device_format
* Simplify the format selection logic in wasapi_init_client_sh
* Unset the microphone in wasapi_microphone_close_mic
- Ought to prevent a potential segfault
* Simplify some logging
* Fix incorrect value being passed to _IAudioCaptureClient_ReleaseBuffer
* Remove some unneeded logging
* Add some values to hresult_name
* Polish up wasapi_select_device_format
- Test for formats manually when Windows can't
- Add some debug logging
- Check for channels
* Compute the fields of WAVEFORMATEXTENSIBLE correctly
- As per the doc's stated requirements
* Simplify logic for WASAPI client creation
* Fix a potential hang in wasapi_microphone_read_shared_buffered
* Stop the microphone if the driver is stopped
* Don't name the microphone event
* Ensure that wasapi_init_client reports the correct format and rate
* Implement exclusive microphone read access for WASAPI
* Add _IAudioCaptureClient_GetNextPacketSize macro
* Organize cases in hresult_name
* Clear some extra fields if wasapi_set_format is setting a Pcm format
* Adjust some logs
* Adjust some logs
* Remove unneeded local vars
* Add a log
* Update wasapi.c
* Update wasapi.c
* Fix shared-mode mic support in WASAPI producing broken input
- Turns out it had nothing to do with shared mode
* Reuse a common function
- Remove wasapi_microphone_read_shared_buffered
- Rename wasapi_microphone_read_exclusive to wasapi_microphone_read_buffered
* Remove some code I was using for test purposes
* Clarify some language
* Double the default shared-mode mic buffer length
* Split getting a device's name into a separate function, then use it
* Fix the ALSA mic drivers
- To comply with changes I previously made to the mic driver interface
* Remove unused synchronization primitives from the SDL microphone driver
* Add sdl_microphone_mic_use_float
* Document audio_driver_state_flags
- I needed to understand these to see if similar flags were required for the mic driver
* Remove an unused function in wasapi.c
* Add and document flags in microphone_driver.h
* Remove driver-specific mic start/stop functions
- The mic driver itself doesn't do much processing
- That honor goes to individual mics
* Remove some unused fields in microphone_driver.h
* Add CMD_EVENT_MICROPHONE_STOP/START
* Remove unused functions from microphone_null
* Change how the mic driver state is referenced in some places
* Simplify the SDL microphone driver
- The driver backend no longer keeps a reference to the mic (the frontend does that)
- Remove functions that are no longer needed
- Don't track paused state, just query the mic itself
* Simplify the WASAPI microphone driver
- Don't track the driver running state or the microphone handle, the frontend does that now
- Remove support for unbuffered input (hunterk suggested that it wasn't necessary)
* Make microphone_wasapi_sh_buffer_length a uint, not an int
- It won't be negative anymore
- 0 now represents the default value
* Make the microphone frontend more robust
- Improve documentation for how various functions should be implemented
- Closes all microphones before freeing the driver (so backends don't have to)
- Tracks the enabled state of each microphone, so backends don't have to (but they still can)
* Stop the mic driver in core_unload_game
* Ensure mic support is compatible with the revised menu code
* Move alsa.h into audio/common
* Remove RETRO_ENVIRONMENT_GET_MICROPHONE_ENABLED
- It was never really needed
* Refactor the ALSA microphone driver
- Move common ALSA functions to audio/common/alsa.c
- Replace alsa_set_mic_enabled_internal with alsa_start/stop_pcm
- Don't track the microphone handle in the ALSA driver context
- Remove unneeded fields
* Move some common alsathread code into audio/common/alsathread.c
* Change return type of mic_driver_open_mic_internal to bool
* First crack at resampling mic input
* Remove an extraneous check
- I think something distracted me when I was writing this line
* Add stereo/mono conversion functions
* Make alsa_start_pcm and alsa_stop_pcm more robust
- They now return success if the stream is already running and stopped, respectively
* Revise some mic-related comments in libretro.h
* First crack at resampling mic input
* Simplify an expression
* Simplify an expression
* Fix a log tag
* Allow mic resampler to be configured separately from audio resampler
* Add some comments
* Set the source ratio to something sensible
* Stop deadlock in `alsathread` mic driver
* Allow mics to be initialized even when core is loaded from CLI
- When loading content from CLI, the drivers are initialized a little differently
- That threw off the mic initialization code
* Rename the functions in retro_microphone_interface
* Revise some mic-related comments in libretro.h
* Update retro_microphone_interface
- Add get_mic_rate
- Add a parameter to open_mic
- The modifications don't do anything yet
* Use parameter objects in the microphone handle
* Replace get_mic_rate with get_params
* Add a microphone interface version
* Remove part of a comment
* Set the effective params in mic_driver_microphone_handle_init
* Drop a stray newline
* Change where the mic interface is zeroed
- I was accidentally throwing out the version that the core was asking for
* Reduce logspam for wasapi_set_nonblock_state
- Now it only logs when the sync mode is changed
* Change DEFAULT_WASAPI_SH_BUFFER_LENGTH to 0
- -16 is no longer a valid value
* Set the new_rate in wasapi_init
* Change description of microphone sample rate in the settings
* First attempt at resampling configured mic input
* Forgot a section
* Fix some input samples being skipped
* Rename a variable for clarity
* Add microphone.outgoing_samples
* Update the mic driver
- Processed samples are now buffered
- The resampler is skipped if the ratio is (very close to) 1
* Remove part of a comment
* Update some comments in audio_resampler.h
* Slightly refactor the SDL microphone driver
- Move SDL_AudioSpec to a field of sdl_microphone_handle_t
- Allow SDL to change the requested format and sample rate
- Request floating-point input
- Implement sdl_microphone_mic_use_float
* Fix a non-C89-compliant declaration
* Add new files to griffin.c
* Remove a C++-style comment
* Add two more files to griffin.c
* Remove some unneeded declarations in microphone_driver.h
* Remove a stray comma in configuration.c
- For C89 compliance
* Fix compilation on some platforms
* Change some function signatures
* Make the ALSA drivers always set the audio rate
* Fix the alsathread mic driver
* Make state_manager_frame_is_reversed return false if HAVE_REWIND isn't defined
* Mute the microphone if the core is running in fast-forward, slow-mo, or rewind
* Clarify a comment
* Clarify a comment
* Add a comment
* Don't allocate memory for slowmo samples in the mic driver
- We're not supporting slowmo for mics, so it's not needed
* Fix a {
* Add my name to AUTHORS.h
* Add driver_lifetime_flags
- For drivers that have special setup/teardown needs
* Ensure that resetting the mic driver maintains active mic handles
- Prevents fullscreen toggle from stopping all mic input
* Update CHANGES.md
* Move some default microphone settings to a new part of the config file
* Ensure that RetroArch can use the audio format that Windows suggests
* Remove references to mic support in the SDL audio driver
* Remove unused WASAPI functions
* Return failure if RetroArch couldn't select a WASAPI format
* Ensure that Windows uses the WASAPI mic driver by default
* Treat disabled mic support as a warning, not an error
* Clarify some WASAPI-related microphone settings
* Remove some unused variables
* Add or revise microphone-related comments
* Rearrange doc comments for microphone types in libretro.h
* Remove a space
* Remove some unused flags
* Remove ALSA error logger
- It was never used anyway
* Remove unneeded microphone-related arguments
* Document a parameter
* Remove a logging call
* Add a constant for the microphone's shared buffer length for WASAPI
* Fix stylistic inconsistencies
* Make mic_driver_get_sample_size a macro instead of a function
* Move the microphone implementation to the audio directory
* Make microphone support optional (but enabled by default)
* Fix the griffin build
Add a display server construct for DRM/KMS mode. The main use is
to provide resolution changes (including automatic refresh rate
switch) for this configuration, i.e. DRM context and OpenGL drivers.
To enable refresh rate restoration after automatic refresh rate
change, av_info->timing_fps is also adjusted on core close / RA exit.
No effects expected on CRTSwitchRes.
* change bsv file suffix to replay, update strings
* add trivial RPLY block to save states
* WIP rerecording support, doesn't load states properly yet--issue with checking identifiers?
* Fixed a type error to get time identifiers working right, ready for testing
* handle case where state without replay data is loaded during replay
* cleanups
* whitespace cleanup
* Cleanups, change replay file format magic, fix logic around future states
* Remove failed future message
* Add play-replay-from-slot command, fix load-state-from-slot to use given slot
* build fixes
* Fix race conditions in emscripten build and incorrect replay state incrementing
* Style fix for single line if
---------
Co-authored-by: Joseph C. Osborn <jcoa2018@pomona.edu>
* Add bsv replay controls (not yet fully implemented), remove toggle
see notes in task_movie.c, make sure command.c calls the right
functions, check retroarch.c and other todos.
bsv files are also now stored with states, not saves.
* Compilation fixes
* Added command impls for play and record replay, and some code in load state to do the right thing there
* Guard some parts of the new code with HAVE_BSV_MOVIE
* wip, menu fixes
* more menu fixes, osd for movie errors, halt recording properly
* Menu and label fixes
* move bsvs to own file suffix series under savestates, fix recording and playback command validity checks
* Fix replay autoincrement
* fix endif placement, whoops
---------
Co-authored-by: Joseph C. Osborn <jcoa2018@pomona.edu>
* Allow for both -e and -R to start a BSV file recording at a state
The key issue is that loading a state takes some time, and the BSV
recording shouldn't start until that's done.
The minimal patch for this would just be a change to runloop.c which
moves movie initialization after entry state loading, throwing in a
task_queue_wait(). This makes for some awkward repeated autoload OSD
messages and doesn't solve the underlying issue.
Most of this change puts BSV recording start/stop into tasks, like
saving and loading are tasks; this was important to centralize BSV
operations a bit more and is the first part of a refactoring towards
more robust input recording. The necessary wait is introduced in the
begin-recording callback.
Co-authored-by: Joseph C. Osborn <jcoa2018@pomona.edu>
* Don't start video recording when BSV recording starts
* Don't double-record inputs in BSV recording
- Will this work properly with the part of input handling outside of
input_state_wrap? Who knows?
Co-authored-by: Joseph C. Osborn <jcoa2018@pomona.edu>
WIP version of Append and Prepend preset, Includes UI for Standard Retroarch, but not the QT UI companion
Co-authored-by: HyperspaceMadness <remimcgill@hotmail.com>
* Add xdelta in deps
* Include <assert.h> in xdelta3.h
- Otherwise the static_assert calls can fail
* Build xdelta3 in Makefile.common
* Add xdelta support to the softpatching infrastructure
- The patching itself isn't fully implemented yet
* Adjust how xdelta3.h checks the sizes of some types
- Now checks max values instead of relying on autotools
* First crack at xdelta softpatching support
- There may be undiscovered edge cases or bugs
* Add xdelta in deps
* Include <assert.h> in xdelta3.h
- Otherwise the static_assert calls can fail
* Build xdelta3 in Makefile.common
* Add xdelta support to the softpatching infrastructure
- The patching itself isn't fully implemented yet
* Adjust how xdelta3.h checks the sizes of some types
- Now checks max values instead of relying on autotools
* First crack at xdelta softpatching support
- There may be undiscovered edge cases or bugs
* Remove trailing commas from the enums I modified
- C89 doesn't allow them
* Remove stray whitespace
* Adjust SIZE macros in xdelta3.h
- Move them outside the XD3_USE_LARGEFILE64 block
- Add more SIZE declarations
- Make SIZEOF_UNSIGNED_LONG_LONG contingent on the presence of ULLONG_MAX
* Add some RARCH_DBG calls for xdelta patching
* Enable support for xdelta's secondary compressors
- Necessary for some patches
* Fix some format specifiers
* Remove unnecessary files from xdelta
* Include xdelta3.h with a relative path
* Add xdelta3 headers to HEADERS variable
* Gate Xdelta support behind HAVE_XDELTA
- HAVE_XDELTA is on by default
- HAVE_PATCH is still required for HAVE_XDELTA to be meaningful
- Support is mostly contingent on the availability of LZMA
- Anything modern should be okay
- Legacy platforms (e.g. DOS) may need to have Xdelta support disabled
- At least until some other solution can be found
* Disable HAVE_XDELTA on platforms where the build recently failed
- These come from looking at the failed builds on GitHub
- These are guesses, and may turn out to be wrong
* Fix a potential memory leak
- Whoops, looks like I need to call two cleanup functions
- xd3_close_stream exists separately from xd3_free_stream
* Split the --help printout for --xdelta into its own strlcat call
- GCC was complaining about #ifdefs within macro arguments being non-portable
* Fix some incorrect printf format specifiers
* Modify Xdelta to adhere to C89
- It's mostly using RetroArch's INLINE macro instead of the inline keyword
- New descriptors: 'dpad_area' and 'abxy_area'
- Each has a diagonal sensitivity setting, 100% being 8-way symmetry
- Buttons can be redefined in the cfg file
E.g. This would create a d-pad area, then redefine it to use analog directions:
overlay0_desc0 = "dpad_area,0.85,0.57,rect,0.166228,0.295516"
overlay0_desc0_up = "r_y_minus"
overlay0_desc0_down = "r_y_plus"
overlay0_desc0_left = "r_x_minus"
overlay0_desc0_right = "r_x_plus"
* * Use flags for rarch_state
* Get rid of ^M linebreaks in retroarch_types.h
* Buildfixes for consoles
* (audio driver) use flags instead of bools
* (video) Use flags instead of bools
* Rewrite input driver state bools into flags
* Reduce snprintf and/or use them only for concatenating the
string formatting of numbers/values
* Reduce snprintfs
* Use snprintf for concatenation at parts
* * We don't need to NULL-terminate strings that get passed to strlcpy/strlcat
and friends
* Use snprintf for concatenation in certain instances
* Do away with some string intermediary copies where we can avoid it
* Fix warning unused variable
* * Reduce snprintf calls
* Rewrite snprintf calls into strlcpy where possible
* Use snprintf for concatenation when necessary
* Do away with some string intermediary copies in task_translation.c
* run_translation_service - make switch slightly smaller
(snprintf) Try to reduce or simplify snprintf calls, only tend to
use it for processing integers/numbers and avoid it for regular
string concatenation (NOTE: we try to be a bit safer about it to
address earlier cited criticism, although we don't consider concatenating
3 or 4 characters at the end to be insecure)
(msg_hash_to_str) Try to avoid duplicate calls to the same localized
string when we can just cache the results once instead locally
(retroarch.c) retroarch_get_capabilities - get rid of strlcat
party in RARCH_CAPABILITIES_CPU, do simple manual assignment for
concatenation instead and NULL terminate at the end
(menu_displaylist.c) Do something about some of the unnecessarily huge
local strings of PATH_MAX_LENGTH size (can be as large as 8192)
(menu_displaylist.c) Replace some trivial strlcats / snprintfs
(D3D10/D3D11/D3D12) Strings don't need to be initialized -
strlcpy already null-terminates - get rid of some constants
as deprecated.
* Use fill_pathname_join_special in the vast majority of cases where
we can ensure out_path is a new empty string
* Get rid of some extension concatenation with strlcat where encountered
* Some general cleanups with NULL termination of strings that get immediately
passed to strlcpy/strlcpy-adjacent functions
* (joypad_connection) Small optimizations -
* Turn functions static where possible
* Hose strlen call out of loop
* (input_driver.c) General cleanups:
* Some small code/style nits
task_screenshot.c:
* Move widget callback function for screenshots to task_screenshot.c
(file_path.c):
* Turn get_pathname_num_slashes into static function
* path_linked_list_free - always returns true, so get rid of return value
* path_linked_list_new - fix function signature
* path_get_archive_delim - do not NULL-terminate string, already done by strlcpy later on
General:
* Slight optimizations - use int/size_t for loop counter variable instead of unsigned
* Take advantage of fact that strlcpy already NULL-terminates, so don't do this explicitly
outside if we're just going to end up calling strlcpy/fill_pathname_join on it anyway
Stateless mode is nonfunctional at the moment, despite my attempts to get it working.
A significant amount of work is required to get it working.
For now, force-disable stateless mode and hide it from menus and the CLI's help text.
- Ensure core is properly unloaded when RETRO_ENVIRONMENT_SHUTDOWN is called
- Ensure menu stack is properly flushed when RETRO_ENVIRONMENT_SHUTDOWN is called
* Support new elf2dol path in Makefile.griffin
* Fix NULL pointer dereference when no core info is available
* Fix double include of different versions of libogc
* Move ngc and wii to Makefile.common
Resulting binary is 60K *smaller*. This is surprising but probably due to
less inlining happening
* gx_gfx: Fix hang on gfx initialization
* Remove sthread_isself on NGC/Wii
It relies on pthread_equal that is not there for either legacy pthreads
or normal pthreads on those platforms
* Wii networking
* Missing includes in split
* Network fixes
* Fix logging of non-format string as a format
* Support for gx netlogger
* Network fix
* Network fixes
* Network info
* gx: Move config files to app directory
Otherwise it clashes between wiiU and vWii version with unpredictable
effects
* Disable run-ahead based on save state support level defined in core info files
* Disable rewind based on save state support level defined in core info files
* Netplay Stuff
## PROTOCOL FALLBACK
In order to support older clients a protocol fallback system was introduced.
The host will no longer send its header automatically after a TCP connection is established, instead, it awaits for the client to send his before determining which protocol this connection is going to operate on.
Netplay has now two protocols, a low protocol and a high protocol; the low protocol is the minimum protocol it supports, while the high protocol is the highest protocol it can operate on.
To fully support older clients, a hack was necessary: sending the high protocol in the unused client's header salt field, while keeping the protocol field to the low protocol. Without this hack we would only be able to support older clients if a newer client was the host.
Any future system can make use of this system by checking connection->netplay_protocol, which is available for both the client and host.
## NETPLAY CHAT
Starting with protocol 6, netplay chat is available through the new NETPLAY_CMD_PLAYER_CHAT command.
Limitations of the command code, which causes a disconnection on unknown commands, makes this system not possible on protocol 5.
Protocol 5 connections can neither send nor receive chat, but other netplay operations are unaffected.
Clients send chat as a string to the server, and it's the server's sole responsability to relay chat messages.
As of now, sending chat uses RetroArch's input menu, while the display of on-screen chat uses a widget overlay and RetroArch's notifications as a fallback.
If a new overlay and/or input system is desired, no backwards compatibility changes need to be made.
Only clients in playing mode (as opposed to spectating mode) can send and receive chat.
## SETTINGS SHARING
Some settings are better used when both host and clients share the same configuration.
As of protocol 6, the following settings will be shared from host to clients (without altering a client's configuration file): input latency frames and allow pausing.
## NETPLAY TUNNEL/MITM
With the current MITM system being defunct (at least as of 1.9.X), a new system was in order to solve most if not all of the problems with the current system.
This new system uses a tunneling approach, which is similar to most VPN and tunneling services around.
Tunnel commands:
RATS[unique id] (RetroArch Tunnel Session) - 16 bytes -> When this command is sent with a zeroed unique id, the tunnel server interprets this as a netplay host wanting to create a new session, in this case, the same command is returned to the host, but now with its unique session id. When a client needs to connect to a host, this command is sent with the unique session id of the host, causing the tunnel server to send a RATL command to the host.
RATL[unique id] (RetroArch Tunnel Link) - 16 bytes -> The tunnel server sends this command to the host when a client wants to connect to the host. Once the host receives this command, it establishes a new connection to the tunnel server, sending this command together with the client's unique id through this new connection, causing the tunnel server to link this connection to the connection of the client.
RATP (RetroArch Tunnel Ping) - 4 bytes -> The tunnel server sends this command to verify that the host, whom the session belongs to, is still around. The host replies with the same command. A session is closed if the tunnel server can not verify that the host is alive.
Operations:
Host -> Instead of listening and accepting connections, it connects to the tunnel server, requests a new session and then monitor this connection for new linking requests. Once a request is received, it establishes a new connection to the tunnel server for linking with a client. The tunnel server's address and port are obtained by querying the lobby server. The host will publish its session id together with the rest of its info to the lobby server.
Client -> It connects to the tunnel server and then sends the session id of the host it wants to connect to. A host's session id is obtained from the json data sent by the lobby server.
Improvements (from current MITM system):
No longer a risk of TCP port exhaustion; we only use one port now at the tunnel server.
Very little cpu usage. About 95% net I/O bound now.
Future backwards compatible with any and all changes to netplay as it no longer runs any netplay logic at MITM servers.
No longer operates the host in client mode, which was a source of many of the current problems.
Cleaner and more maintainable system and code.
Notable functions:
netplay_mitm_query -> Grabs the tunnel's address and port from the lobby server.
init_tcp_socket -> Handles the creation and operation mode of the TCP socket based on whether it's host, host+MITM or client.
handle_mitm_connection -> Creates and completes linking connections and replies to ping commands (only 1 of each per call to not affect performance).
## MISC
Ping Limiter: If a client's estimated latency to the server is higher than this value, connection will be dropped just before finishing the netplay handshake.
Ping Counter: A ping counter (similar to the FPS one) can be shown in the bottom right corner of the screen, if you are connected to a host.
LAN Discovery: Refactored and moved to its own "Refresh Netplay LAN List" button.
## FIXES
Many minor fixes to the current netplay implementation are also included.
* Remove NETPLAY_TEST_BUILD
* Move ui_companion_driver code out of retroarch.c
* Buildfix
* Fix error - was reading the array out of (preinitialized) bounds
* Remove unused variable
Pressing the START button removes the device pairing. Useful in case
the device (e.g. gamepad) was paired with a different adapter/computer
and needs to be paired again with current adapter/computer.
To pair again, RetroArch needs to be restarted, so the device list is
populated again.
Upstream of patch used by Lakka at build time
1943ad296e/packages/libretro/retroarch/patches/retroarch-98-remove_bluetooth_pairing.patch
To avoid any filesystem corruption during shutdown/reboot a sleep is
added before shutdown/reboot is called. Also no quit is called, as the
RetroArch process will be killed by systemd. Quitting RetroArch may
result in unwanted restart of RetroArch by systemd.
Upstream of patch used by Lakka at build time
1943ad296e/packages/libretro/retroarch/patches/retroarch-02-graceful-shutdown-reboot-hack.patch
When Shutdown or Reboot are selected from the main menu, configuration
is saved regardless of checking the user setting. Showing the widget and
saving the configuration should be called only in case user wants to
save configuration on exit.
Grisly Glee