Nix configurations for my homelab
Patch xdg-desktop-portal-wlr to fix the stuttering in stream output
+130
-15
+12
-12
flake.lock
+12
-12
flake.lock
···
149
149
]
150
150
},
151
151
"locked": {
152
-
"lastModified": 1775360939,
153
-
"narHash": "sha256-XUBlSgUFdvTh6+K5LcI5mJu5F5L8scmJDMRiZM484TM=",
152
+
"lastModified": 1775556024,
153
+
"narHash": "sha256-j1u/859OVS54rGlsvFqJdwKPEnFYCI+4pyfTiSfv1Xc=",
154
154
"owner": "nix-community",
155
155
"repo": "home-manager",
156
-
"rev": "2097a5c82bdc099c6135eae4b111b78124604554",
156
+
"rev": "4bdfeff1d9b7473e6e58f73f5809576e8a69e406",
157
157
"type": "github"
158
158
},
159
159
"original": {
···
348
348
},
349
349
"nixpkgs-unstable": {
350
350
"locked": {
351
-
"lastModified": 1775036866,
352
-
"narHash": "sha256-ZojAnPuCdy657PbTq5V0Y+AHKhZAIwSIT2cb8UgAz/U=",
351
+
"lastModified": 1775423009,
352
+
"narHash": "sha256-vPKLpjhIVWdDrfiUM8atW6YkIggCEKdSAlJPzzhkQlw=",
353
353
"owner": "NixOS",
354
354
"repo": "nixpkgs",
355
-
"rev": "6201e203d09599479a3b3450ed24fa81537ebc4e",
355
+
"rev": "68d8aa3d661f0e6bd5862291b5bb263b2a6595c9",
356
356
"type": "github"
357
357
},
358
358
"original": {
···
380
380
},
381
381
"nixpkgs_3": {
382
382
"locked": {
383
-
"lastModified": 1775371993,
384
-
"narHash": "sha256-shlcgEOzW6rl7zmZeYBMP9EpF3O/cTL7/HpWlyqearw=",
383
+
"lastModified": 1775545155,
384
+
"narHash": "sha256-hTjWyj6wz9Iw6IjfrP+rZj1V1DjbVRCd1WjcpxH8Fqs=",
385
385
"owner": "NixOS",
386
386
"repo": "nixpkgs",
387
-
"rev": "ff2af6f7ebc6c123603d5689aeea6461290f46b5",
387
+
"rev": "f97e195236002ce34b91d43ffe68557ac7d007fc",
388
388
"type": "github"
389
389
},
390
390
"original": {
···
450
450
"rust-overlay": "rust-overlay"
451
451
},
452
452
"locked": {
453
-
"lastModified": 1775298296,
454
-
"narHash": "sha256-TiuT6J+Q2wfdNIwvytKF2J02ySiwO+6whpGXCHzPMSo=",
453
+
"lastModified": 1775543919,
454
+
"narHash": "sha256-htsluTXkVCDngTRD0oNIGH8bTf2u0/j3t52Ha2chG1w=",
455
455
"owner": "roc-lang",
456
456
"repo": "roc",
457
-
"rev": "564046bf97229be1dfabc433871bffc5fcb934d7",
457
+
"rev": "aa4e23c44773c16fbfe09aee22df9f84d81e9225",
458
458
"type": "github"
459
459
},
460
460
"original": {
+5
-3
modules/river.nix
+5
-3
modules/river.nix
···
25
25
roc-lang-server = roc-lang.packages.${prev.stdenv.hostPlatform.system}.lang-server;
26
26
xdg-desktop-portal-wlr = prev.xdg-desktop-portal-wlr.overrideAttrs (
27
27
finalAttrs: prevAttrs: {
28
-
version = "0.7.1";
28
+
version = "896cee82a6f14ee996fb870c0fc5e27533e37907";
29
29
30
30
src = prev.fetchFromGitHub {
31
31
owner = "emersion";
32
32
repo = "xdg-desktop-portal-wlr";
33
-
rev = "v${finalAttrs.version}";
34
-
sha256 = "sha256-GIIDeZMIGUiZV0IUhcclRVThE5LKaqVc5VwnNT8beNU=";
33
+
rev = "${finalAttrs.version}";
34
+
sha256 = "sha256-uQYXGiMmrMHCygh5IHt90NSZLPbY7uVMyDx8zUTHXaM=";
35
35
};
36
+
37
+
patches = (prevAttrs.patches or [ ]) ++ [ ../patches/${prevAttrs.pname}/pw-graph-driver.patch ];
36
38
}
37
39
);
38
40
})
+113
patches/xdg-desktop-portal-wlr/pw-graph-driver.patch
+113
patches/xdg-desktop-portal-wlr/pw-graph-driver.patch
···
1
+
From 8142629da7fd5e400fd00658d5ddaa8ea78cba53 Mon Sep 17 00:00:00 2001
2
+
From: CToID <funk443@icloud.com>
3
+
Date: Sun, 5 Apr 2026 23:24:45 +0800
4
+
Subject: [PATCH] screencast: drive the Pipewire graph by ourselves.
5
+
6
+
---
7
+
src/screencast/pipewire_screencast.c | 56 +++++++++++++++++-----------
8
+
1 file changed, 35 insertions(+), 21 deletions(-)
9
+
10
+
diff --git a/src/screencast/pipewire_screencast.c b/src/screencast/pipewire_screencast.c
11
+
index 102a0f2b..04f3341b 100644
12
+
--- a/src/screencast/pipewire_screencast.c
13
+
+++ b/src/screencast/pipewire_screencast.c
14
+
@@ -16,6 +16,7 @@
15
+
#include "wlr_screencast.h"
16
+
#include "xdpw.h"
17
+
#include "logger.h"
18
+
+#include "timespec_util.h"
19
+
20
+
#define DAMAGE_REGION_COUNT 16
21
+
22
+
@@ -328,6 +329,31 @@ void xdpw_pwr_enqueue_buffer(struct xdpw_screencast_instance *cast) {
23
+
cast->current_frame.pw_buffer = NULL;
24
+
}
25
+
26
+
+static void pwr_capture_one(void *data) {
27
+
+ struct xdpw_screencast_instance *cast = data;
28
+
+
29
+
+ if (!cast->pwr_stream_state) {
30
+
+ logprint(INFO, "pipewire: not streaming");
31
+
+ return;
32
+
+ }
33
+
+
34
+
+ if (cast->current_frame.pw_buffer) {
35
+
+ logprint(DEBUG, "pipewire: buffer already exported");
36
+
+ goto trigger_graph;
37
+
+ }
38
+
+
39
+
+ xdpw_pwr_dequeue_buffer(cast);
40
+
+ if (!cast->current_frame.pw_buffer) {
41
+
+ logprint(WARN, "pipewire: unable to export buffer");
42
+
+ goto trigger_graph;
43
+
+ }
44
+
+
45
+
+ xdpw_wlr_frame_capture(cast);
46
+
+
47
+
+trigger_graph:
48
+
+ pw_stream_trigger_process(cast->stream);
49
+
+}
50
+
+
51
+
void pwr_update_stream_param(struct xdpw_screencast_instance *cast) {
52
+
logprint(TRACE, "pipewire: stream update parameters");
53
+
struct pw_stream *stream = cast->stream;
54
+
@@ -359,6 +385,7 @@ static void pwr_handle_stream_state_changed(void *data,
55
+
switch (state) {
56
+
case PW_STREAM_STATE_STREAMING:
57
+
cast->pwr_stream_state = true;
58
+
+ pwr_capture_one(cast);
59
+
break;
60
+
case PW_STREAM_STATE_PAUSED:
61
+
if (old == PW_STREAM_STATE_STREAMING) {
62
+
@@ -586,27 +613,13 @@ static void pwr_handle_stream_remove_buffer(void *data, struct pw_buffer *buffer
63
+
buffer->user_data = NULL;
64
+
}
65
+
66
+
-static void pwr_handle_stream_on_process(void *data) {
67
+
+static void pwr_handle_stream_trigger_done(void *data) {
68
+
struct xdpw_screencast_instance *cast = data;
69
+
-
70
+
- logprint(TRACE, "pipewire: on process event handle");
71
+
-
72
+
- if (!cast->pwr_stream_state) {
73
+
- logprint(INFO, "pipewire: not streaming");
74
+
- return;
75
+
- }
76
+
-
77
+
- if (cast->current_frame.pw_buffer) {
78
+
- logprint(DEBUG, "pipewire: buffer already exported");
79
+
- return;
80
+
+ uint64_t delay_ns = fps_limit_measure_end(&cast->fps_limit, cast->framerate);
81
+
+ if (delay_ns <= 0) {
82
+
+ delay_ns = (1.0 / cast->framerate) * TIMESPEC_NSEC_PER_SEC;
83
+
}
84
+
-
85
+
- xdpw_pwr_dequeue_buffer(cast);
86
+
- if (!cast->current_frame.pw_buffer) {
87
+
- logprint(WARN, "pipewire: unable to export buffer");
88
+
- return;
89
+
- }
90
+
- xdpw_wlr_frame_capture(cast);
91
+
+ xdpw_add_timer(cast->ctx->state, delay_ns, pwr_capture_one, cast);
92
+
}
93
+
94
+
static const struct pw_stream_events pwr_stream_events = {
95
+
@@ -615,7 +628,7 @@ static const struct pw_stream_events pwr_stream_events = {
96
+
.param_changed = pwr_handle_stream_param_changed,
97
+
.add_buffer = pwr_handle_stream_add_buffer,
98
+
.remove_buffer = pwr_handle_stream_remove_buffer,
99
+
- .process = pwr_handle_stream_on_process,
100
+
+ .trigger_done = pwr_handle_stream_trigger_done,
101
+
};
102
+
103
+
void xdpw_pwr_stream_create(struct xdpw_screencast_instance *cast) {
104
+
@@ -652,7 +665,8 @@ void xdpw_pwr_stream_create(struct xdpw_screencast_instance *cast) {
105
+
pw_stream_connect(cast->stream,
106
+
PW_DIRECTION_OUTPUT,
107
+
PW_ID_ANY,
108
+
- PW_STREAM_FLAG_ALLOC_BUFFERS,
109
+
+ (PW_STREAM_FLAG_ALLOC_BUFFERS |
110
+
+ PW_STREAM_FLAG_DRIVER),
111
+
params.data, params.size / sizeof(struct spa_pod *));
112
+
113
+
spa_pod_dynamic_builder_clean(&builder);