From 99097c84490becf77b71f01befd9d176cdcd540d Mon Sep 17 00:00:00 2001
From: tom-ard <tom@arducam.com>
Date: Fri, 17 May 2024 03:46:57 +0100
Subject: [PATCH] Add '-tuningfile' parameter to set the tuning file path

---
 .../plugins/input_libcamera/README.md                |  4 +++-
 .../plugins/input_libcamera/input_libcamera.cpp      | 12 ++++++++++--
 mjpg-streamer-experimental/utils.h                   |  8 ++++++++
 3 files changed, 21 insertions(+), 3 deletions(-)

diff --git a/mjpg-streamer-experimental/plugins/input_libcamera/README.md b/mjpg-streamer-experimental/plugins/input_libcamera/README.md
index b3d7e9c6..379d97ec 100644
--- a/mjpg-streamer-experimental/plugins/input_libcamera/README.md
+++ b/mjpg-streamer-experimental/plugins/input_libcamera/README.md
@@ -37,7 +37,9 @@ Usage
  [-gain ]...............: Set gain (integer)
  [-afmode]..............: Control to set the mode of the AF (autofocus) algorithm.(manual, auto, continuous)
  [-afrange].............: Set the range of focus distances that is scanned.(normal, macro, full)
- [-lensposition]........: Set the lens to a particular focus position, expressed as a reciprocal distance (0 moves the lens to infinity), or "default" for the hyperfocal distance ---------------------------------------------------------------
+ [-lensposition]........: Set the lens to a particular focus position, expressed as a reciprocal distance (0 moves the lens to infinity), or "default" for the hyperfocal distance 
+ [-tuningfile]..........: Name of camera tuning file to use, omit this option for libcamera default behaviour
+ ---------------------------------------------------------------
 ```
 
 Example
diff --git a/mjpg-streamer-experimental/plugins/input_libcamera/input_libcamera.cpp b/mjpg-streamer-experimental/plugins/input_libcamera/input_libcamera.cpp
index 262ad91f..569c23e0 100644
--- a/mjpg-streamer-experimental/plugins/input_libcamera/input_libcamera.cpp
+++ b/mjpg-streamer-experimental/plugins/input_libcamera/input_libcamera.cpp
@@ -50,6 +50,7 @@ typedef struct {
         lensposition_set, lensposition,
         camera_set, camera,
         rotation_set, rotation;
+    char tuningfile[100];
 } context_settings;
 
 typedef struct {
@@ -114,7 +115,8 @@ static void help() {
     " [-gain ]...............: Set gain (integer)\n"
     " [-afmode]..............: Control to set the mode of the AF (autofocus) algorithm.(manual, auto, continuous)\n"
     " [-afrange].............: Set the range of focus distances that is scanned.(normal, macro, full)\n"
-    " [-lensposition]........: Set the lens to a particular focus position, expressed as a reciprocal distance (0 moves the lens to infinity), or \"default\" for the hyperfocal distance"
+    " [-lensposition]........: Set the lens to a particular focus position, expressed as a reciprocal distance (0 moves the lens to infinity), or \"default\" for the hyperfocal distance\n"
+    " [-tuningfile]..........: Name of camera tuning file to use, omit this option for libcamera default behaviour\n"
     " ---------------------------------------------------------------\n\n"\
     );
 }
@@ -127,7 +129,7 @@ static context_settings* init_settings() {
         IPRINT("error allocating context");
         exit(EXIT_FAILURE);
     }
-    
+
     settings->quality = 80;
     return settings;
 }
@@ -207,6 +209,7 @@ int input_init(input_parameter *param, int plugin_no)
             {"lensposition", required_argument, 0, 0},  // 19
             {"camera", required_argument, 0, 0},        // 20
             {"rotation", required_argument, 0, 0},      // 21
+            {"tuningfile", required_argument, 0, 0},    // 22
             {0, 0, 0, 0}
         };
     
@@ -273,6 +276,8 @@ int input_init(input_parameter *param, int plugin_no)
             break;
         OPTION_INT(21, rotation)
             break;
+        OPTION_STRING(22, tuningfile)
+            break;
         default:
             help();
             return 1;
@@ -280,6 +285,9 @@ int input_init(input_parameter *param, int plugin_no)
     }
 
     IPRINT("Desired Resolution: %i x %i\n", width, height);
+    IPRINT("tuning file path: %s\n", settings->tuningfile);
+    if (settings->tuningfile != "")
+        setenv("LIBCAMERA_RPI_TUNING_FILE", settings->tuningfile, 1);
 
     if (!settings->buffercount) {
         settings->buffercount = 4;
diff --git a/mjpg-streamer-experimental/utils.h b/mjpg-streamer-experimental/utils.h
index a5f45e85..f5ccf042 100644
--- a/mjpg-streamer-experimental/utils.h
+++ b/mjpg-streamer-experimental/utils.h
@@ -78,6 +78,14 @@ void daemon_mode(void);
     } \
     settings->v##_set = 1;
 
+#define OPTION_STRING(idx, v) \
+    case idx: \
+        DBG("case " #idx); \
+        if (sscanf(optarg, "%s", &settings->v) != 1) { \
+            fprintf(stderr, "Invalid value '%s' for -" #v " (string required)\n", optarg); \
+            exit(EXIT_FAILURE); \
+        }
+
 /* 1 is true, 0 is false */
 #define OPTION_BOOL(idx, v) \
   case idx: \