rpi: pass log level to libcamera (#2617)

internal/core/core.go

@@ -310,6 +310,7 @@ func (p *Core) createResources(initial bool) error {
 
 	if p.pathManager == nil {
 		p.pathManager = newPathManager(
+			p.conf.LogLevel,
 			p.conf.ExternalAuthenticationURL,
 			p.conf.RTSPAddress,
 			p.conf.AuthMethods,
@@ -614,6 +615,7 @@ func (p *Core) closeResources(newConf *conf.Conf, calledByAPI bool) {
 		closeLogger
 
 	closePathManager := newConf == nil ||
+		newConf.LogLevel != p.conf.LogLevel ||
 		newConf.ExternalAuthenticationURL != p.conf.ExternalAuthenticationURL ||
 		newConf.RTSPAddress != p.conf.RTSPAddress ||
 		!reflect.DeepEqual(newConf.AuthMethods, p.conf.AuthMethods) ||

internal/core/path.go

@@ -64,6 +64,7 @@ type pathAPIPathsGetReq struct {
 }
 
 type path struct {
+	logLevel          conf.LogLevel
 	rtspAddress       string
 	readTimeout       conf.StringDuration
 	writeTimeout      conf.StringDuration
@@ -116,6 +117,7 @@ type path struct {
 
 func newPath(
 	parentCtx context.Context,
+	logLevel conf.LogLevel,
 	rtspAddress string,
 	readTimeout conf.StringDuration,
 	writeTimeout conf.StringDuration,
@@ -132,6 +134,7 @@ func newPath(
 	ctx, ctxCancel := context.WithCancel(parentCtx)
 
 	pa := &path{
+		logLevel:                       logLevel,
 		rtspAddress:                    rtspAddress,
 		readTimeout:                    readTimeout,
 		writeTimeout:                   writeTimeout,
@@ -206,6 +209,7 @@ func (pa *path) run() {
 
 		pa.source = &staticSourceHandler{
 			conf:           pa.conf,
+			logLevel:       pa.logLevel,
 			readTimeout:    pa.readTimeout,
 			writeTimeout:   pa.writeTimeout,
 			writeQueueSize: pa.writeQueueSize,

internal/core/path_manager.go

@@ -79,6 +79,7 @@ type pathManagerParent interface {
 }
 
 type pathManager struct {
+	logLevel                  conf.LogLevel
 	externalAuthenticationURL string
 	rtspAddress               string
 	authMethods               conf.AuthMethods
@@ -112,6 +113,7 @@ type pathManager struct {
 }
 
 func newPathManager(
+	logLevel conf.LogLevel,
 	externalAuthenticationURL string,
 	rtspAddress string,
 	authMethods conf.AuthMethods,
@@ -126,6 +128,7 @@ func newPathManager(
 	ctx, ctxCancel := context.WithCancel(context.Background())
 
 	pm := &pathManager{
+		logLevel:                  logLevel,
 		externalAuthenticationURL: externalAuthenticationURL,
 		rtspAddress:               rtspAddress,
 		authMethods:               authMethods,
@@ -400,6 +403,7 @@ func (pm *pathManager) createPath(
 ) {
 	pa := newPath(
 		pm.ctx,
+		pm.logLevel,
 		pm.rtspAddress,
 		pm.readTimeout,
 		pm.writeTimeout,

internal/core/static_source_handler.go

@@ -31,6 +31,7 @@ type staticSourceHandlerParent interface {
 // staticSourceHandler is a static source handler.
 type staticSourceHandler struct {
 	conf           *conf.Path
+	logLevel       conf.LogLevel
 	readTimeout    conf.StringDuration
 	writeTimeout   conf.StringDuration
 	writeQueueSize int
@@ -108,7 +109,8 @@ func (s *staticSourceHandler) initialize() {
 
 	case s.resolvedSource == "rpiCamera":
 		s.instance = &rpicamerasource.Source{
-			Parent: s,
+			LogLevel: s.logLevel,
+			Parent:   s,
 		}
 	}
 }

internal/protocols/rpicamera/exe/camera.cpp

@@ -126,13 +126,23 @@ static void set_hdr(bool hdr) {
 }
 
 bool camera_create(const parameters_t *params, camera_frame_cb frame_cb, camera_t **cam) {
+    std::unique_ptr<CameraPriv> camp = std::make_unique<CameraPriv>();
+
     set_hdr(params->hdr);
 
+    if (strcmp(params->log_level, "debug") == 0) {
+        setenv("LIBCAMERA_LOG_LEVELS", "*:DEBUG", 1);
+    } else if (strcmp(params->log_level, "info") == 0) {
+        setenv("LIBCAMERA_LOG_LEVELS", "*:INFO", 1);
+    } else if (strcmp(params->log_level, "warn") == 0) {
+       setenv("LIBCAMERA_LOG_LEVELS", "*:WARN", 1);
+    } else { // error
+        setenv("LIBCAMERA_LOG_LEVELS", "*:ERROR", 1);
+    }
+
     // We make sure to set the environment variable before libcamera init
     setenv("LIBCAMERA_RPI_TUNING_FILE", params->tuning_file, 1);
 
-    std::unique_ptr<CameraPriv> camp = std::make_unique<CameraPriv>();
-
     camp->camera_manager = std::make_unique<CameraManager>();
     int ret = camp->camera_manager->start();
     if (ret != 0) {

internal/protocols/rpicamera/exe/parameters.c

@@ -37,7 +37,9 @@ bool parameters_unserialize(parameters_t *params, const uint8_t *buf, size_t buf
         char *key = strsep(&entry, ":");
         char *val = strsep(&entry, ":");
 
-        if (strcmp(key, "CameraID") == 0) {
+        if (strcmp(key, "LogLevel") == 0) {
+            params->log_level = base64_decode(val);
+        } else if (strcmp(key, "CameraID") == 0) {
             params->camera_id = atoi(val);
         } else if (strcmp(key, "Width") == 0) {
             params->width = atoi(val);

internal/protocols/rpicamera/exe/parameters.h

@@ -8,6 +8,7 @@
 #include "sensor_mode.h"
 
 typedef struct {
+    char *log_level;
     unsigned int camera_id;
     unsigned int width;
     unsigned int height;

internal/protocols/rpicamera/params.go

@@ -9,6 +9,7 @@ import (
 
 // Params is a set of camera parameters.
 type Params struct {
+	LogLevel          string
 	CameraID          int
 	Width             int
 	Height            int

internal/protocols/rpicamera/rpicamera.go

@@ -111,8 +111,10 @@ func checkLibraries64Bit() error {
 	return nil
 }
 
+// RPICamera is a RPI Camera reader.
 type RPICamera struct {
-	onData func(time.Duration, [][]byte)
+	Params Params
+	OnData func(time.Duration, [][]byte)
 
 	cmd       *exec.Cmd
 	pipeConf  *pipe
@@ -122,31 +124,25 @@ type RPICamera struct {
 	readerDone chan error
 }
 
-func New(
-	params Params,
-	onData func(time.Duration, [][]byte),
-) (*RPICamera, error) {
+// Initialize initializes a RPICamera.
+func (c *RPICamera) Initialize() error {
 	if runtime.GOARCH == "arm" {
 		err := checkLibraries64Bit()
 		if err != nil {
-			return nil, err
+			return err
 		}
 	}
 
-	c := &RPICamera{
-		onData: onData,
-	}
-
 	var err error
 	c.pipeConf, err = newPipe()
 	if err != nil {
-		return nil, err
+		return err
 	}
 
 	c.pipeVideo, err = newPipe()
 	if err != nil {
 		c.pipeConf.close()
-		return nil, err
+		return err
 	}
 
 	env := []string{
@@ -158,10 +154,10 @@ func New(
 	if err != nil {
 		c.pipeConf.close()
 		c.pipeVideo.close()
-		return nil, err
+		return err
 	}
 
-	c.pipeConf.write(append([]byte{'c'}, params.serialize()...))
+	c.pipeConf.write(append([]byte{'c'}, c.Params.serialize()...))
 
 	c.waitDone = make(chan error)
 	go func() {
@@ -178,15 +174,15 @@ func New(
 		c.pipeConf.close()
 		c.pipeVideo.close()
 		<-c.readerDone
-		return nil, fmt.Errorf("process exited unexpectedly")
+		return fmt.Errorf("process exited unexpectedly")
 
 	case err := <-c.readerDone:
 		if err != nil {
 			c.pipeConf.write([]byte{'e'})
 			<-c.waitDone
 			c.pipeConf.close()
 			c.pipeVideo.close()
-			return nil, err
+			return err
 		}
 	}
 
@@ -195,7 +191,7 @@ func New(
 		c.readerDone <- c.readData()
 	}()
 
-	return c, nil
+	return nil
 }
 
 func (c *RPICamera) Close() {
@@ -248,6 +244,6 @@ func (c *RPICamera) readData() error {
 			return err
 		}
 
-		c.onData(dts, nalus)
+		c.OnData(dts, nalus)
 	}
 }

internal/protocols/rpicamera/rpicamera_disabled.go

@@ -14,14 +14,14 @@ func Cleanup() {
 }
 
 // RPICamera is a RPI Camera reader.
-type RPICamera struct{}
+type RPICamera struct {
+	Params Params
+	OnData func(time.Duration, [][]byte)
+}
 
-// New allocates a RPICamera.
-func New(
-	_ Params,
-	_ func(time.Duration, [][]byte),
-) (*RPICamera, error) {
-	return nil, fmt.Errorf("server was compiled without support for the Raspberry Pi Camera")
+// Initialize initializes a RPICamera.
+func (c *RPICamera) Initialize() error {
+	return fmt.Errorf("server was compiled without support for the Raspberry Pi Camera")
 }
 
 // Close closes a RPICamera.

internal/staticsources/rpicamera/source.go

@@ -15,8 +15,19 @@ import (
 	"github.com/bluenviron/mediamtx/internal/unit"
 )
 
-func paramsFromConf(cnf *conf.Path) rpicamera.Params {
+func paramsFromConf(logLevel conf.LogLevel, cnf *conf.Path) rpicamera.Params {
 	return rpicamera.Params{
+		LogLevel: func() string {
+			switch logLevel {
+			case conf.LogLevel(logger.Debug):
+				return "debug"
+			case conf.LogLevel(logger.Info):
+				return "info"
+			case conf.LogLevel(logger.Warn):
+				return "warn"
+			}
+			return "error"
+		}(),
 		CameraID:          cnf.RPICameraCamID,
 		Width:             cnf.RPICameraWidth,
 		Height:            cnf.RPICameraHeight,
@@ -54,7 +65,8 @@ func paramsFromConf(cnf *conf.Path) rpicamera.Params {
 
 // Source is a Raspberry Pi Camera static source.
 type Source struct {
-	Parent defs.StaticSourceParent
+	LogLevel conf.LogLevel
+	Parent   defs.StaticSourceParent
 }
 
 // Log implements logger.Writer.
@@ -96,7 +108,11 @@ func (s *Source) Run(params defs.StaticSourceRunParams) error {
 		})
 	}
 
-	cam, err := rpicamera.New(paramsFromConf(params.Conf), onData)
+	cam := &rpicamera.RPICamera{
+		Params: paramsFromConf(s.LogLevel, params.Conf),
+		OnData: onData,
+	}
+	err := cam.Initialize()
 	if err != nil {
 		return err
 	}
@@ -111,7 +127,7 @@ func (s *Source) Run(params defs.StaticSourceRunParams) error {
 	for {
 		select {
 		case cnf := <-params.ReloadConf:
-			cam.ReloadParams(paramsFromConf(cnf))
+			cam.ReloadParams(paramsFromConf(s.LogLevel, cnf))
 
 		case <-params.Context.Done():
 			return nil