FFmpeg avdevice fix

sensors/video/sensorhub-driver-ffmpeg/README.md

@@ -60,6 +60,9 @@ When added to an OpenSensorHub node, the driver has the following configuration
     - **Inject Extradata:**
       Only for H264. When checked, injects Annex B extradata into the video stream before every keyframe. 
       This is necessary for late-join decoders (those that receive live data from the driver after the driver has started).
+    - **Register Devices:**
+      Register external A/V device libraries. Enable if input is not from a network stream or file (e.g. Direct Show, V4L).
+      Disable this option if the driver fails to start and produces the error `java.lang.UnsatisfiedLinkError: no jniavdevice in java.library.path`.
 
 - **Position:**
     - **Location:** (Optional)

sensors/video/sensorhub-driver-ffmpeg/src/main/java/org/sensorhub/impl/sensor/ffmpeg/FFMPEGSensor.java

@@ -211,6 +211,7 @@ protected boolean openStream() {
                 mpegTsProcessor = new MpegTsProcessor(config.connection.connectionString, config.connection.commandLineArgs);
             }
             mpegTsProcessor.setInjectVideoExtradata(config.connection.injectExtradata);
+            mpegTsProcessor.registerDevices(config.connection.registerDevices);
         }
 
         if (mpegTsProcessor.isStreamOpened()) {

sensors/video/sensorhub-driver-ffmpeg/src/main/java/org/sensorhub/impl/sensor/ffmpeg/config/Connection.java

@@ -43,4 +43,7 @@ public class Connection {
 
     @DisplayInfo(label = "Inject Extradata for Streaming", desc = "Injects extradata into the video stream. Set true if this driver is being used to output a live video stream for late-join decoders.")
     public boolean injectExtradata = true;
+
+    @DisplayInfo(label = "Register Devices", desc = "Registers devices for the video stream. Set true if input is not from a network stream or file (e.g. dshow).")
+    public boolean registerDevices = false;
 }

sensors/video/sensorhub-driver-ffmpeg/src/main/java/org/sensorhub/mpegts/MpegTsProcessor.java

@@ -94,6 +94,8 @@ public class MpegTsProcessor extends Thread {
 
     private String formatString;
 
+    private boolean registerDevices = false;
+
     /**
      * Context used by underlying FFmpeg library to decode stream.
      */
@@ -193,6 +195,10 @@ public boolean openStream() {
 
         avformat.avformat_network_init();
 
+        if (registerDevices) {
+            avdevice_register_all();
+        }
+
         // Create a new AV Format Context for I/O
         avFormatContext = avformat_alloc_context();
 
@@ -210,15 +216,12 @@ public int call(Pointer opaque) {
 
         // Set timeout
         var options = new AVDictionary(null);
-        avdevice_register_all();
         String cmdFormat;
         cmdFormat = populateOptions(options, optionsString);
         if (cmdFormat != null && !cmdFormat.isBlank()) {
             inputFormat = av_find_input_format(cmdFormat);
         }
 
-        //avutil.av_dict_set(options, "timeout", "3000000", 0);
-
         int returnCode = avformat.avformat_open_input(avFormatContext, streamSource, inputFormat, options);
         logger.debug("returnCode: {}", returnCode);
 
@@ -415,6 +418,10 @@ public void setInjectVideoExtradata(boolean injectVideoExtradata) {
         videoStreamContext.setInjectingExtradata(injectVideoExtradata);
     }
 
+    public void registerDevices(boolean registerDevices) {
+        this.registerDevices = registerDevices;
+    }
+
     /**
      * Registers a data buffer listener to call if clients are interested in demuxed data buffers
      *

sensors/video/sensorhub-driver-ffmpeg/src/main/java/org/sensorhub/mpegts/StreamContext.java

@@ -3,8 +3,6 @@
 import org.bytedeco.ffmpeg.avcodec.*;
 import org.bytedeco.ffmpeg.avformat.AVFormatContext;
 import org.bytedeco.ffmpeg.global.avcodec;
-import org.bytedeco.javacpp.BytePointer;
-import org.bytedeco.javacpp.PointerPointer;
 import org.slf4j.Logger;
 import org.slf4j.LoggerFactory;
 
@@ -164,16 +162,9 @@ public void openCodecContext(AVFormatContext avFormatContext) throws IllegalStat
 
             AVCodecParameters params = avFormatContext.streams(getStreamId()).codecpar();
 
-            // Get the associated codec from the ID stored in the context
-            AVCodec codec = avcodec.avcodec_find_decoder(params.codec_id());
-
-            if (codec == null) {
-                throw new IllegalStateException("Unsupported codec");
-            }
-
             // Store the codec name
-            setCodecName(codec.name().getString());
-            setCodecId(codec.id());
+            setCodecName(avcodec.avcodec_get_name(params.codec_id()).getString());
+            setCodecId(params.codec_id());
 
             if (isInjectingExtradata) {
                 String bsfNames = selectBsfName(codecId, avFormatContext);