mikael-lovqvists-claude-agent/video-setup
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Add no-signal animation to display windows

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When a viewer window has no incoming stream, renders animated analog-TV
noise (hash-based, scanlines, phosphor tint) at configurable fps (default
15) with a centred "NO SIGNAL" text overlay.

- xorg: FRAG_NOSIGNAL_SRC shader + xorg_viewer_render_no_signal(v, time, noise_res)
- main: Display_Slot gains no_signal_fps + last_no_signal_t; display_loop_tick
  drives no-signal render on idle slots via clock_gettime rate limiting
- protocol: START_DISPLAY extended by 2 bytes — no_signal_fps (0=default 15)
  + reserved; reader is backward-compatible (defaults 0 if length < 18)
- controller_cli: no_signal_fps optional arg on start-display
- docs: protocol.md updated with new field

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
This commit is contained in:
mikael-lovqvists-claude-agent
2026-03-29 19:20:53 +00:00
parent 7808d832be
commit 54d48c9c8e
7 changed files with 158 additions and 31 deletions
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25
dev/cli/controller_cli.c
View File

@@ -307,22 +307,25 @@ static void cmd_start_display(struct Transport_Conn *conn,
int ntok, char *tokens[])
{
/* Required: stream_id
* Optional: win_x win_y win_w win_h */
* Optional: win_x win_y win_w win_h no_signal_fps */
if (ntok < 2) {
printf("usage: start-display <stream_id> [win_x] [win_y] [win_w] [win_h]\n");
printf("usage: start-display <stream_id> [win_x] [win_y] [win_w] [win_h] [no_signal_fps]\n");
return;
}
uint16_t stream_id = (uint16_t)atoi(tokens[1]);
int16_t win_x = ntok > 2 ? (int16_t)atoi(tokens[2]) : 0;
int16_t win_y = ntok > 3 ? (int16_t)atoi(tokens[3]) : 0;
uint16_t win_w = ntok > 4 ? (uint16_t)atoi(tokens[4]) : 0;
uint16_t win_h = ntok > 5 ? (uint16_t)atoi(tokens[5]) : 0;
printf("start-display: stream=%u pos=%d,%d size=%ux%u\n",
stream_id, win_x, win_y, win_w, win_h);
uint16_t stream_id = (uint16_t)atoi(tokens[1]);
int16_t win_x = ntok > 2 ? (int16_t)atoi(tokens[2]) : 0;
int16_t win_y = ntok > 3 ? (int16_t)atoi(tokens[3]) : 0;
uint16_t win_w = ntok > 4 ? (uint16_t)atoi(tokens[4]) : 0;
uint16_t win_h = ntok > 5 ? (uint16_t)atoi(tokens[5]) : 0;
uint8_t no_signal_fps = ntok > 6 ? (uint8_t)atoi(tokens[6]) : 0;
printf("start-display: stream=%u pos=%d,%d size=%ux%u no_signal_fps=%u\n",
stream_id, win_x, win_y, win_w, win_h,
no_signal_fps > 0 ? no_signal_fps : 15);
SEND_AND_WAIT(cs, PROTO_CMD_START_DISPLAY,
proto_write_start_display(conn, next_req_id(req),
stream_id, win_x, win_y, win_w, win_h,
PROTO_DISPLAY_SCALE_FIT, PROTO_DISPLAY_ANCHOR_CENTER));
PROTO_DISPLAY_SCALE_FIT, PROTO_DISPLAY_ANCHOR_CENTER,
no_signal_fps));
}
static void cmd_stop_display(struct Transport_Conn *conn,
@@ -345,7 +348,7 @@ static void cmd_help(void)
" start-ingest <stream_id> <device> <dest_host> <dest_port>"
" [format] [width] [height] [fps_n] [fps_d]\n"
" stop-ingest <stream_id>\n"
" start-display <stream_id> [win_x] [win_y] [win_w] [win_h]\n"
" start-display <stream_id> [win_x] [win_y] [win_w] [win_h] [no_signal_fps]\n"
" stop-display <stream_id>\n"
" help\n"
" quit / exit\n");