From 1c9dc0fd89cfb32d31e25c4d14501c891d329307 Mon Sep 17 00:00:00 2001
From: Kieran Bingham <kieran.bingham@ideasonboard.com>
Date: Mon, 2 May 2022 16:42:49 +0200
Subject: libcamera: v4l2_videodevice: Identify non-zero stream starts

V4L2 Video devices should always start streaming from index zero.
Identify and report a warning if they don't, and correct for any offset.

Reviewed-by: Jacopo Mondi <jacopo@jmondi.org>
Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: Kieran Bingham <kieran.bingham@ideasonboard.com>
---
 include/libcamera/internal/v4l2_videodevice.h | 1 +
 1 file changed, 1 insertion(+)

(limited to 'include/libcamera/internal/v4l2_videodevice.h')

diff --git a/include/libcamera/internal/v4l2_videodevice.h b/include/libcamera/internal/v4l2_videodevice.h
index 23f37f83..8525acbc 100644
--- a/include/libcamera/internal/v4l2_videodevice.h
+++ b/include/libcamera/internal/v4l2_videodevice.h
@@ -276,6 +276,7 @@ private:
 	EventNotifier *fdBufferNotifier_;
 
 	State state_;
+	std::optional<unsigned int> firstFrame_;
 
 	Timer watchdog_;
 	utils::Duration watchdogDuration_;
-- 
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