Nintendo Switch Brew

GRC services: Difference between revisions

← Older editNewer edit →
No edit summary
Line 8: Line 8:
{| class="wikitable" border="1"
{| class="wikitable" border="1"
|-
|-
! Cmd || Name || Notes
! Cmd || Name
|-
|-
| 1 || OpenContinuousRecorder || Takes a total of 0x28-bytes of input and a handle, returns an [[#IContinuousRecorder]].
| 1 || [[#OpenContinuousRecorder]]
|-
|-
| 2 || OpenGameMovieTrimmer || Takes an input u64 and a handle, returns an [[#IGameMovieTrimmer]].
| 2 || [[#OpenGameMovieTrimmer]]
|-
|-
| 3 || [5.0.0+] || Takes a total of 0x8-bytes of input and a handle, returns an [[#IOffscreenRecorder]].
| 3 || [5.0.0+] [[#OpenOffscreenRecorder]]
|-
|-
| 101 || [5.0.0+] || Takes a total of 0x10-bytes of input, returns an [[#IMovieMaker]].
| 101 || [5.0.0+] [[#CreateMovieMaker]]
|-
|-
| 9903 || [5.0.0+] || Takes 8-bytes of input, no output.
| 9903 || [5.0.0+] [[#SetOffscreenRecordingMarker]]
|}
|}


[5.0.0+] OpenContinuousRecorder now takes an additional 0x20-bytes of input.
== OpenContinuousRecorder ==
Takes a total of 0x28-bytes of input and a handle, returns an [[#IContinuousRecorder]].
 
[5.0.0+] Now takes an additional 0x20-bytes of input.
 
== OpenGameMovieTrimmer ==
Takes an input u64 and a handle, returns an [[#IGameMovieTrimmer]].
 
== OpenOffscreenRecorder ==
Takes a total of 0x8-bytes of input and a handle, returns an [[#IOffscreenRecorder]].
 
== CreateMovieMaker ==
Takes a total of 0x10-bytes of input, returns an [[#IMovieMaker]].
 
== SetOffscreenRecordingMarker ==
Takes 8-bytes of input, no output.
 
Affects the behavior of [[#CompleteOffscreenRecordingFinish]], [[#CompleteOffscreenRecordingFinishEx0]] and [[#CompleteOffscreenRecordingFinishEx1]], forcing them to stop at different stages.


== IContinuousRecorder ==
== IContinuousRecorder ==
Line 88: Line 105:
This is "nn::grcsrv::IRemoteVideoTransfer".
This is "nn::grcsrv::IRemoteVideoTransfer".


Added with [[6.0.0]].
This was added with [[6.0.0]].


The max sessions for this service is 4, and there's 2 IPC handler threads.
The max sessions for this service is 4, and it uses 2 IPC handler threads.


{| class="wikitable" border="1"
{| class="wikitable" border="1"
|-
|-
! Cmd || Name || Notes
! Cmd || Name
|-
|-
| 1 || || No input/output.
| 1 || [[#Initialize]]
|-
|-
| 2 || || Takes an input u32 (must be value 0-1) and a type-0x6 output buffer, returns a total of 0x10-bytes of output.
| 2 || [[#Transfer]]
|}
|}


== Cmd1 ==
== Initialize ==
No input/output.
 
Begins video stream. This must not be used more than once, even from a different service session: otherwise the sysmodule will assert.
Begins video stream. This must not be used more than once, even from a different service session: otherwise the sysmodule will assert.


== Cmd2 ==
== Transfer ==
Retrieves stream data, from the video recording being done of the currently running game title. Takes u32 "stream" (0: video, 1: audio), returns u32 (num_frames?), u32 data_size, u64 (start_timestamp?). Video stream writes H.264 NAL units to the output buffer (try <code>ffplay -f h264</code>). Audio stream is PCM16, 2 channels, and sample-rate = 48000Hz. Official code uses buffer size 0x32000 for video, 0x1000 for audio, and multiple threads to read out both streams at the same time.
Takes an u32 '''stream''' (0: video, 1: audio) and a type-0x6 output buffer, returns 2 u32s '''num_frames''' and '''data_size''' and an u64 '''start_timestamp'''.
 
Retrieves stream data from the continuous recorder in use. Video stream writes H.264 NAL units to the output buffer (try <code>ffplay -f h264</code>). Audio stream is PCM16, 2 channels, and sample-rate = 48000Hz. Official code uses buffer size 0x32000 for video, 0x1000 for audio, and multiple threads to read out both streams at the same time.


This will block until data is available. This will hang if there is no game title running which has video capture enabled.
This will block until data is available. This will hang if there is no game title running which has video capture enabled.
Line 235: Line 256:


= OffscreenRecordingParameter =
= OffscreenRecordingParameter =
This is "nn::grcsrv::OffscreenRecordingParameter".
This is a 0x80-byte struct. "nn::grc::OffscreenRecordingParameter" and "nn::album::MovieMakerMovieParameter" are identical to this.
{| class="wikitable" border="1"
{| class="wikitable" border="1"
|-
|-
Line 265: Line 290:
| 0x3C || 0x44 || ? || 0
| 0x3C || 0x44 || ? || 0
|}
|}
This is "nn::grcsrv::OffscreenRecordingParameter". This is a 0x80-byte struct. "nn::grc::OffscreenRecordingParameter" and "nn::album::MovieMakerMovieParameter" are identical to this.


The above default values are initialized by the official user-process via sdk-nso funcs "nn::album::MovieMakerMovieParameter::GetDefaultValue()" / "nn::album::MovieMakerMovieParameter::MovieMakerMovieParameter()" (both funcs are identical).
The above default values are initialized by the official user-process via sdk-nso funcs "nn::album::MovieMakerMovieParameter::GetDefaultValue()" / "nn::album::MovieMakerMovieParameter::MovieMakerMovieParameter()" (both funcs are identical).


= GameMovieId =
= GameMovieId =
This is "nn::grcsrv::GameMovieId".
This is a 0x40-byte struct.
{| class="wikitable" border="1"
{| class="wikitable" border="1"
|-
|-
Line 279: Line 306:
| 0x18 || 0x28 || Unused, always zero.
| 0x18 || 0x28 || Unused, always zero.
|}
|}
This is "nn::grcsrv::GameMovieId". This is a 0x40-byte struct.


= IHOSBinderDriver =
= IHOSBinderDriver =
Retrieved from "https://switchbrew.org/wiki/GRC_services"