Add a way to retrieve volume while capturing audio on record.

include/linphone/api/c-recorder.h

@@ -100,6 +100,13 @@ LINPHONE_PUBLIC LinphoneRecorderState linphone_recorder_get_state(const Linphone
  */
 LINPHONE_PUBLIC int linphone_recorder_get_duration(const LinphoneRecorder *recorder);
 
+/**
+ * Get linear volume when capturing audio.
+ * @param recorder The #LinphoneRecorder object. @notnil
+ * @return Linear volume.
+ */
+LINPHONE_PUBLIC float linphone_recorder_get_capture_volume(const LinphoneRecorder *recorder);
+
 /**
  * Create a content from the recording, for example to send it in a chat message.
  * @warning Recorder must be in Closed state!

src/c-wrapper/api/c-recorder.cpp

@@ -70,6 +70,10 @@ int linphone_recorder_get_duration(const LinphoneRecorder *recorder) {
 	return Recorder::toCpp(recorder)->getDuration();
 }
 
+float linphone_recorder_get_capture_volume(const LinphoneRecorder *recorder) {
+	return Recorder::toCpp(recorder)->getCaptureVolume();
+}
+
 LinphoneContent *linphone_recorder_create_content(LinphoneRecorder *recorder) {
 	LinphonePrivate::Content *fileContent = Recorder::toCpp(recorder)->createContent();
 	if (fileContent != nullptr) {

src/recorder/recorder.cpp

@@ -124,6 +124,10 @@ int Recorder::getDuration () const {
 	}
 }
 
+float Recorder::getCaptureVolume() const{
+	return ms_media_recorder_get_capture_volume(mRecorder);
+}
+
 FileContent* Recorder::createContent () const {
 	LinphoneRecorderState currentState = getState();
 	if (currentState != LinphoneRecorderClosed) {

src/recorder/recorder.h

@@ -52,6 +52,7 @@ public:
 
 	LinphoneRecorderState getState () const;
 	int getDuration () const;
+	float getCaptureVolume() const;
 	FileContent* createContent () const;
 
 	void setParams (std::shared_ptr<RecorderParams> params);