diff --git a/services/camera/libcameraservice/api1/Camera2Client.cpp b/services/camera/libcameraservice/api1/Camera2Client.cpp
index e109595..8e88ca7 100644
--- a/services/camera/libcameraservice/api1/Camera2Client.cpp
+++ b/services/camera/libcameraservice/api1/Camera2Client.cpp
@@ -764,16 +764,22 @@
     // first capture latency on HAL3 devices, and potentially on some HAL2
     // devices. So create it unconditionally at preview start. As a drawback,
     // this increases gralloc memory consumption for applications that don't
-    // ever take a picture.
+    // ever take a picture. Do not enter this mode when jpeg stream will slow
+    // down preview.
     // TODO: Find a better compromise, though this likely would involve HAL
     // changes.
     int lastJpegStreamId = mJpegProcessor->getStreamId();
-    res = updateProcessorStream(mJpegProcessor, params);
-    if (res != OK) {
-        ALOGE("%s: Camera %d: Can't pre-configure still image "
-                "stream: %s (%d)",
-                __FUNCTION__, mCameraId, strerror(-res), res);
-        return res;
+    // If jpeg stream will slow down preview, make sure we remove it before starting preview
+    if (params.slowJpegMode) {
+        mJpegProcessor->deleteStream();
+    } else {
+        res = updateProcessorStream(mJpegProcessor, params);
+        if (res != OK) {
+            ALOGE("%s: Camera %d: Can't pre-configure still image "
+                    "stream: %s (%d)",
+                    __FUNCTION__, mCameraId, strerror(-res), res);
+            return res;
+        }
     }
     bool jpegStreamChanged = mJpegProcessor->getStreamId() != lastJpegStreamId;
 
@@ -1453,9 +1459,12 @@
         }
 
         ALOGV("%s: Camera %d: Starting picture capture", __FUNCTION__, mCameraId);
-
         int lastJpegStreamId = mJpegProcessor->getStreamId();
-        res = updateProcessorStream(mJpegProcessor, l.mParameters);
+        // slowJpegMode will create jpeg stream in CaptureSequencer before capturing
+        if (!l.mParameters.slowJpegMode) {
+            res = updateProcessorStream(mJpegProcessor, l.mParameters);
+        }
+
         // If video snapshot fail to configureStream, try override video snapshot size to
         // video size
         if (res == BAD_VALUE && l.mParameters.state == Parameters::VIDEO_SNAPSHOT) {
@@ -1943,6 +1952,31 @@
     return mStreamingProcessor->stopStream();
 }
 
+status_t Camera2Client::createJpegStreamL(Parameters &params) {
+    status_t res = OK;
+    int lastJpegStreamId = mJpegProcessor->getStreamId();
+    if (lastJpegStreamId != NO_STREAM) {
+        return INVALID_OPERATION;
+    }
+
+    res = mStreamingProcessor->togglePauseStream(/*pause*/true);
+    if (res != OK) {
+        ALOGE("%s: Camera %d: Can't pause streaming: %s (%d)",
+                __FUNCTION__, mCameraId, strerror(-res), res);
+        return res;
+    }
+
+    res = mDevice->flush();
+    if (res != OK) {
+        ALOGE("%s: Camera %d: Unable flush device: %s (%d)",
+                __FUNCTION__, mCameraId, strerror(-res), res);
+        return res;
+    }
+
+    res = updateProcessorStream(mJpegProcessor, params);
+    return res;
+}
+
 const int32_t Camera2Client::kPreviewRequestIdStart;
 const int32_t Camera2Client::kPreviewRequestIdEnd;
 const int32_t Camera2Client::kRecordingRequestIdStart;
diff --git a/services/camera/libcameraservice/api1/Camera2Client.h b/services/camera/libcameraservice/api1/Camera2Client.h
index c288313..d50bf63 100644
--- a/services/camera/libcameraservice/api1/Camera2Client.h
+++ b/services/camera/libcameraservice/api1/Camera2Client.h
@@ -129,6 +129,9 @@
 
     status_t stopStream();
 
+    // For the slowJpegMode to create jpeg stream when precapture sequence is done
+    status_t createJpegStreamL(camera2::Parameters &params);
+
     static size_t calculateBufferSize(int width, int height,
             int format, int stride);
 
@@ -145,6 +148,9 @@
     static const char* kAutofocusLabel;
     static const char* kTakepictureLabel;
 
+    // Used with stream IDs
+    static const int NO_STREAM = -1;
+
 private:
     /** ICamera interface-related private members */
     typedef camera2::Parameters Parameters;
@@ -177,9 +183,6 @@
     void     setPreviewCallbackFlagL(Parameters &params, int flag);
     status_t updateRequests(Parameters &params);
 
-    // Used with stream IDs
-    static const int NO_STREAM = -1;
-
     template <typename ProcessorT>
     status_t updateProcessorStream(sp<ProcessorT> processor, Parameters params);
     template <typename ProcessorT,
diff --git a/services/camera/libcameraservice/api1/client2/CaptureSequencer.cpp b/services/camera/libcameraservice/api1/client2/CaptureSequencer.cpp
index d847e0f..5f7fd74 100644
--- a/services/camera/libcameraservice/api1/client2/CaptureSequencer.cpp
+++ b/services/camera/libcameraservice/api1/client2/CaptureSequencer.cpp
@@ -504,6 +504,17 @@
      *  - recording (if recording enabled)
      */
     outputStreams.push(client->getPreviewStreamId());
+
+    int captureStreamId = client->getCaptureStreamId();
+    if (captureStreamId == Camera2Client::NO_STREAM) {
+        res = client->createJpegStreamL(l.mParameters);
+        if (res != OK || client->getCaptureStreamId() == Camera2Client::NO_STREAM) {
+            ALOGE("%s: Camera %d: cannot create jpeg stream for slowJpeg mode: %s (%d)",
+                  __FUNCTION__, client->getCameraId(), strerror(-res), res);
+            return DONE;
+        }
+    }
+
     outputStreams.push(client->getCaptureStreamId());
 
     if (l.mParameters.previewCallbackFlags &
diff --git a/services/camera/libcameraservice/api1/client2/Parameters.cpp b/services/camera/libcameraservice/api1/client2/Parameters.cpp
index c3a6842..699de2f 100644
--- a/services/camera/libcameraservice/api1/client2/Parameters.cpp
+++ b/services/camera/libcameraservice/api1/client2/Parameters.cpp
@@ -889,15 +889,30 @@
     previewCallbackOneShot = false;
     previewCallbackSurface = false;
 
+    Size maxJpegSize = getMaxSize(getAvailableJpegSizes());
+    int64_t minFrameDurationNs = getJpegStreamMinFrameDurationNs(maxJpegSize);
+
+    slowJpegMode = false;
+    if (minFrameDurationNs > kSlowJpegModeThreshold) {
+        slowJpegMode = true;
+        // Slow jpeg devices does not support video snapshot without
+        // slowing down preview.
+        // TODO: support video size video snapshot only?
+        params.set(CameraParameters::KEY_VIDEO_SNAPSHOT_SUPPORTED,
+            CameraParameters::FALSE);
+    }
+
     char value[PROPERTY_VALUE_MAX];
     property_get("camera.disable_zsl_mode", value, "0");
-    if (!strcmp(value,"1")) {
+    if (!strcmp(value,"1") || slowJpegMode) {
         ALOGI("Camera %d: Disabling ZSL mode", cameraId);
         zslMode = false;
     } else {
         zslMode = true;
     }
 
+    ALOGI("%s: zslMode: %d slowJpegMode %d", __FUNCTION__, zslMode, slowJpegMode);
+
     lightFx = LIGHTFX_NONE;
 
     state = STOPPED;
@@ -2778,6 +2793,17 @@
     return maxSize;
 }
 
+Parameters::Size Parameters::getMaxSize(const Vector<Parameters::Size> &sizes) {
+    Size maxSize = {-1, -1};
+    for (size_t i = 0; i < sizes.size(); i++) {
+        if (sizes[i].width > maxSize.width ||
+                (sizes[i].width == maxSize.width && sizes[i].height > maxSize.height )) {
+            maxSize = sizes[i];
+        }
+    }
+    return maxSize;
+}
+
 Vector<Parameters::StreamConfiguration> Parameters::getStreamConfigurations() {
     const int STREAM_CONFIGURATION_SIZE = 4;
     const int STREAM_FORMAT_OFFSET = 0;
@@ -2792,7 +2818,7 @@
 
     camera_metadata_ro_entry_t availableStreamConfigs =
                 staticInfo(ANDROID_SCALER_AVAILABLE_STREAM_CONFIGURATIONS);
-    for (size_t i=0; i < availableStreamConfigs.count; i+= STREAM_CONFIGURATION_SIZE) {
+    for (size_t i = 0; i < availableStreamConfigs.count; i+= STREAM_CONFIGURATION_SIZE) {
         int32_t format = availableStreamConfigs.data.i32[i + STREAM_FORMAT_OFFSET];
         int32_t width = availableStreamConfigs.data.i32[i + STREAM_WIDTH_OFFSET];
         int32_t height = availableStreamConfigs.data.i32[i + STREAM_HEIGHT_OFFSET];
@@ -2803,11 +2829,51 @@
     return scs;
 }
 
+int64_t Parameters::getJpegStreamMinFrameDurationNs(Parameters::Size size) {
+    if (mDeviceVersion >= CAMERA_DEVICE_API_VERSION_3_2) {
+        const int STREAM_DURATION_SIZE = 4;
+        const int STREAM_FORMAT_OFFSET = 0;
+        const int STREAM_WIDTH_OFFSET = 1;
+        const int STREAM_HEIGHT_OFFSET = 2;
+        const int STREAM_DURATION_OFFSET = 3;
+        camera_metadata_ro_entry_t availableStreamMinDurations =
+                    staticInfo(ANDROID_SCALER_AVAILABLE_MIN_FRAME_DURATIONS);
+        for (size_t i = 0; i < availableStreamMinDurations.count; i+= STREAM_DURATION_SIZE) {
+            int64_t format = availableStreamMinDurations.data.i64[i + STREAM_FORMAT_OFFSET];
+            int64_t width = availableStreamMinDurations.data.i64[i + STREAM_WIDTH_OFFSET];
+            int64_t height = availableStreamMinDurations.data.i64[i + STREAM_HEIGHT_OFFSET];
+            int64_t duration = availableStreamMinDurations.data.i64[i + STREAM_DURATION_OFFSET];
+            if (format == HAL_PIXEL_FORMAT_BLOB && width == size.width && height == size.height) {
+                return duration;
+            }
+        }
+    } else {
+        Vector<Size> availableJpegSizes = getAvailableJpegSizes();
+        size_t streamIdx = availableJpegSizes.size();
+        for (size_t i = 0; i < availableJpegSizes.size(); i++) {
+            if (availableJpegSizes[i].width == size.width &&
+                    availableJpegSizes[i].height == size.height) {
+                streamIdx = i;
+                break;
+            }
+        }
+        if (streamIdx != availableJpegSizes.size()) {
+            camera_metadata_ro_entry_t jpegMinDurations =
+                    staticInfo(ANDROID_SCALER_AVAILABLE_JPEG_MIN_DURATIONS);
+            if (streamIdx < jpegMinDurations.count) {
+                return jpegMinDurations.data.i64[streamIdx];
+            }
+        }
+    }
+    ALOGE("%s: cannot find jpeg size %dx%d", size.width, size.height);
+    return -1;
+}
+
 SortedVector<int32_t> Parameters::getAvailableOutputFormats() {
     SortedVector<int32_t> outputFormats; // Non-duplicated output formats
     if (mDeviceVersion >= CAMERA_DEVICE_API_VERSION_3_2) {
         Vector<StreamConfiguration> scs = getStreamConfigurations();
-        for (size_t i=0; i < scs.size(); i++) {
+        for (size_t i = 0; i < scs.size(); i++) {
             const StreamConfiguration &sc = scs[i];
             if (sc.isInput == ANDROID_SCALER_AVAILABLE_STREAM_CONFIGURATIONS_OUTPUT) {
                 outputFormats.add(sc.format);
@@ -2815,7 +2881,7 @@
         }
     } else {
         camera_metadata_ro_entry_t availableFormats = staticInfo(ANDROID_SCALER_AVAILABLE_FORMATS);
-        for (size_t i=0; i < availableFormats.count; i++) {
+        for (size_t i = 0; i < availableFormats.count; i++) {
             outputFormats.add(availableFormats.data.i32[i]);
         }
     }
@@ -2826,7 +2892,7 @@
     Vector<Parameters::Size> jpegSizes;
     if (mDeviceVersion >= CAMERA_DEVICE_API_VERSION_3_2) {
         Vector<StreamConfiguration> scs = getStreamConfigurations();
-        for (size_t i=0; i < scs.size(); i++) {
+        for (size_t i = 0; i < scs.size(); i++) {
             const StreamConfiguration &sc = scs[i];
             if (sc.isInput == ANDROID_SCALER_AVAILABLE_STREAM_CONFIGURATIONS_OUTPUT &&
                     sc.format == HAL_PIXEL_FORMAT_BLOB) {
@@ -2840,7 +2906,7 @@
         const int HEIGHT_OFFSET = 1;
         camera_metadata_ro_entry_t availableJpegSizes =
             staticInfo(ANDROID_SCALER_AVAILABLE_JPEG_SIZES);
-        for (size_t i=0; i < availableJpegSizes.count; i+= JPEG_SIZE_ENTRY_COUNT) {
+        for (size_t i = 0; i < availableJpegSizes.count; i+= JPEG_SIZE_ENTRY_COUNT) {
             int width = availableJpegSizes.data.i32[i + WIDTH_OFFSET];
             int height = availableJpegSizes.data.i32[i + HEIGHT_OFFSET];
             Size sz = {width, height};
diff --git a/services/camera/libcameraservice/api1/client2/Parameters.h b/services/camera/libcameraservice/api1/client2/Parameters.h
index 46d48bc..972d007 100644
--- a/services/camera/libcameraservice/api1/client2/Parameters.h
+++ b/services/camera/libcameraservice/api1/client2/Parameters.h
@@ -166,6 +166,9 @@
     bool previewCallbackSurface;
 
     bool zslMode;
+    // Whether the jpeg stream is slower than 30FPS and can slow down preview.
+    // When slowJpegMode is true, zslMode must be false to avoid slowing down preview.
+    bool slowJpegMode;
 
     // Overall camera state
     enum State {
@@ -190,6 +193,8 @@
     static const int MAX_INITIAL_PREVIEW_HEIGHT = 1080;
     // Aspect ratio tolerance
     static const CONSTEXPR float ASPECT_RATIO_TOLERANCE = 0.001;
+    // Threshold for slow jpeg mode
+    static const int64_t kSlowJpegModeThreshold = 33400000LL; // 33.4 ms
 
     // Full static camera info, object owned by someone else, such as
     // Camera2Device.
@@ -377,15 +382,23 @@
         int32_t height;
         int32_t isInput;
     };
+
     // Helper function extract available stream configuration
     // Only valid since device HAL version 3.2
     // returns an empty Vector if device HAL version does support it
     Vector<StreamConfiguration> getStreamConfigurations();
 
+    // Helper function to get minimum frame duration for a jpeg size
+    // return -1 if input jpeg size cannot be found in supported size list
+    int64_t getJpegStreamMinFrameDurationNs(Parameters::Size size);
+
     // Helper function to get non-duplicated available output formats
     SortedVector<int32_t> getAvailableOutputFormats();
     // Helper function to get available output jpeg sizes
     Vector<Size> getAvailableJpegSizes();
+    // Helper function to get maximum size in input Size vector.
+    // The maximum size is defined by comparing width first, when width ties comparing height.
+    Size getMaxSize(const Vector<Size>& sizes);
 
     int mDeviceVersion;
 };