From e6d8a74b306d39b6b834549c67a6dfdc31f4575a Mon Sep 17 00:00:00 2001
From: Mohamed Hamdan <mhamdan@winfooz.com>
Date: Thu, 18 Jun 2020 14:01:16 +0300
Subject: [PATCH] Add setter method for capture rate, can be used to record
 timelapse video

---
 .../otaliastudios/cameraview/CameraView.java  | 20 +++++++++++++++++++
 .../otaliastudios/cameraview/VideoResult.java |  1 +
 .../cameraview/engine/CameraBaseEngine.java   | 13 ++++++++++++
 .../cameraview/engine/CameraEngine.java       |  3 +++
 .../cameraview/video/FullVideoRecorder.java   |  1 +
 5 files changed, 38 insertions(+)

diff --git a/cameraview/src/main/java/com/otaliastudios/cameraview/CameraView.java b/cameraview/src/main/java/com/otaliastudios/cameraview/CameraView.java
index 89eb0016e..38fba0585 100644
--- a/cameraview/src/main/java/com/otaliastudios/cameraview/CameraView.java
+++ b/cameraview/src/main/java/com/otaliastudios/cameraview/CameraView.java
@@ -1575,6 +1575,26 @@ public int getVideoBitRate() {
         return mCameraEngine.getVideoBitRate();
     }
 
+    /**
+     * Sets the capture rate in frame per second for video capturing.
+     * it's can used to capture timelapse video
+     * Will be used by {@link #takeVideo(File)}.
+     *
+     * @param captureRate desired capture rate
+     */
+    public void setVideoCaptureRate(double captureRate) {
+        mCameraEngine.setVideoCaptureRate(captureRate);
+    }
+
+    /**
+     * Returns the current video bit rate.
+     * @return current bit rate
+     */
+    @SuppressWarnings("unused")
+    public double getVideoCaptureRate() {
+        return mCameraEngine.getVideoCaptureRate();
+    }
+
     /**
      * A flag to control the behavior when calling {@link #setPreviewFrameRate(float)}.
      *
diff --git a/cameraview/src/main/java/com/otaliastudios/cameraview/VideoResult.java b/cameraview/src/main/java/com/otaliastudios/cameraview/VideoResult.java
index 45daf3ec7..616329946 100644
--- a/cameraview/src/main/java/com/otaliastudios/cameraview/VideoResult.java
+++ b/cameraview/src/main/java/com/otaliastudios/cameraview/VideoResult.java
@@ -41,6 +41,7 @@ public static class Stub {
         public int maxDuration;
         public int endReason;
         public int videoBitRate;
+        public double videoCaptureRate;
         public int videoFrameRate;
         public int audioBitRate;
     }
diff --git a/cameraview/src/main/java/com/otaliastudios/cameraview/engine/CameraBaseEngine.java b/cameraview/src/main/java/com/otaliastudios/cameraview/engine/CameraBaseEngine.java
index a751f4b0f..acb3bae2a 100644
--- a/cameraview/src/main/java/com/otaliastudios/cameraview/engine/CameraBaseEngine.java
+++ b/cameraview/src/main/java/com/otaliastudios/cameraview/engine/CameraBaseEngine.java
@@ -85,6 +85,7 @@ public abstract class CameraBaseEngine extends CameraEngine {
     private long mVideoMaxSize;
     private int mVideoMaxDuration;
     private int mVideoBitRate;
+    private double mVideoCaptureRate;
     private int mAudioBitRate;
     private long mAutoFocusResetDelayMillis;
     private int mSnapshotMaxWidth; // in REF_VIEW like SizeSelectors
@@ -245,6 +246,16 @@ public final int getVideoBitRate() {
         return mVideoBitRate;
     }
 
+    @Override
+    public final void setVideoCaptureRate(double videoCaptureRate) {
+        mVideoCaptureRate = videoCaptureRate;
+    }
+
+    @Override
+    public final double getVideoCaptureRate() {
+        return mVideoCaptureRate;
+    }
+
     @Override
     public final void setAudioCodec(@NonNull AudioCodec codec) {
         mAudioCodec = codec;
@@ -601,6 +612,7 @@ public void run() {
                 stub.maxSize = mVideoMaxSize;
                 stub.maxDuration = mVideoMaxDuration;
                 stub.videoBitRate = mVideoBitRate;
+                stub.videoCaptureRate = mVideoCaptureRate;
                 stub.audioBitRate = mAudioBitRate;
                 onTakeVideo(stub);
             }
@@ -626,6 +638,7 @@ public void run() {
                 stub.location = mLocation;
                 stub.facing = mFacing;
                 stub.videoBitRate = mVideoBitRate;
+                stub.videoCaptureRate = mVideoCaptureRate;
                 stub.audioBitRate = mAudioBitRate;
                 stub.audio = mAudio;
                 stub.maxSize = mVideoMaxSize;
diff --git a/cameraview/src/main/java/com/otaliastudios/cameraview/engine/CameraEngine.java b/cameraview/src/main/java/com/otaliastudios/cameraview/engine/CameraEngine.java
index e695b61c9..fb45a5ceb 100644
--- a/cameraview/src/main/java/com/otaliastudios/cameraview/engine/CameraEngine.java
+++ b/cameraview/src/main/java/com/otaliastudios/cameraview/engine/CameraEngine.java
@@ -635,6 +635,9 @@ public final void onSurfaceDestroyed() {
     public abstract void setVideoBitRate(int videoBitRate);
     public abstract int getVideoBitRate();
 
+    public abstract void setVideoCaptureRate(double videoCaptureRate);
+    public abstract double getVideoCaptureRate();
+
     public abstract void setAudioBitRate(int audioBitRate);
     public abstract int getAudioBitRate();
 
diff --git a/cameraview/src/main/java/com/otaliastudios/cameraview/video/FullVideoRecorder.java b/cameraview/src/main/java/com/otaliastudios/cameraview/video/FullVideoRecorder.java
index 1bcca1286..47e3e7499 100644
--- a/cameraview/src/main/java/com/otaliastudios/cameraview/video/FullVideoRecorder.java
+++ b/cameraview/src/main/java/com/otaliastudios/cameraview/video/FullVideoRecorder.java
@@ -215,6 +215,7 @@ private boolean prepareMediaRecorder(@NonNull VideoResult.Stub stub,
                 flip ? stub.size.getHeight() : stub.size.getWidth(),
                 flip ? stub.size.getWidth() : stub.size.getHeight());
         mMediaRecorder.setVideoFrameRate(stub.videoFrameRate);
+        mMediaRecorder.setCaptureRate(stub.videoCaptureRate);
         mMediaRecorder.setVideoEncoder(mProfile.videoCodec);
         mMediaRecorder.setVideoEncodingBitRate(stub.videoBitRate);