Modified Libcamera to allow Touch to focus

Change-Id: I7f1cdc2ce64d60da97cb7d829f51bb4bb1b07c89

5 files changed, 148 insertions, 4 deletions

diff --git a/libcamera/Android.mk b/libcamera/Android.mk
index 1ade091..4e9ac05 100644
--- a/libcamera/Android.mk
+++ b/libcamera/Android.mk
@@ -11,7 +11,9 @@ LOCAL_C_INCLUDES += $(LOCAL_PATH)/../include
 LOCAL_C_INCLUDES += $(LOCAL_PATH)/../libs3cjpeg
 
 LOCAL_SRC_FILES:= \
-	SecCamera.cpp SecCameraHWInterface.cpp
+	SecCamera.cpp \
+	SecCameraHWInterface.cpp \
+	SecCameraUtils.cpp \
 
 LOCAL_SHARED_LIBRARIES:= libutils libcutils libbinder liblog libcamera_client libhardware
 LOCAL_SHARED_LIBRARIES+= libs3cjpeg
diff --git a/libcamera/SecCamera.cpp b/libcamera/SecCamera.cpp
index 9c2d023..2b09168 100755
--- a/libcamera/SecCamera.cpp
+++ b/libcamera/SecCamera.cpp
@@ -2477,9 +2477,6 @@ int SecCamera::setObjectPosition(int x, int y)
 {
     LOGV("%s(setObjectPosition(x=%d, y=%d))", __func__, x, y);
 
-    if (m_preview_width ==640)
-        x = x - 80;
-
     if (fimc_v4l2_s_ctrl(m_cam_fd, V4L2_CID_CAMERA_OBJECT_POSITION_X, x) < 0) {
         LOGE("ERR(%s):Fail on V4L2_CID_CAMERA_OBJECT_POSITION_X", __func__);
         return -1;
diff --git a/libcamera/SecCameraHWInterface.cpp b/libcamera/SecCameraHWInterface.cpp
index ca82669..87c2b96 100755
--- a/libcamera/SecCameraHWInterface.cpp
+++ b/libcamera/SecCameraHWInterface.cpp
@@ -21,6 +21,8 @@
 #include <utils/Log.h>
 
 #include "SecCameraHWInterface.h"
+#include "SecCameraUtils.h"
+
 #include <utils/threads.h>
 #include <fcntl.h>
 #include <sys/mman.h>
@@ -282,6 +284,10 @@ void CameraHardwareSec::initDefaultParameters(int cameraId)
         p.set(CameraParameters::KEY_PREVIEW_FPS_RANGE, "15000,30000");
 
         p.set(CameraParameters::KEY_FOCAL_LENGTH, "3.43");
+
+        // touch focus
+        p.set(CameraParameters::KEY_MAX_NUM_FOCUS_AREAS, "1");
+        p.set(CameraParameters::KEY_FOCUS_AREAS, "(0,0,0,0,0)");
     } else {
         p.set(CameraParameters::KEY_SUPPORTED_PREVIEW_FPS_RANGE, "(7500,30000)");
         p.set(CameraParameters::KEY_PREVIEW_FPS_RANGE, "7500,30000");
@@ -1950,6 +1956,29 @@ status_t CameraHardwareSec::setParameters(const CameraParameters& params)
                 mParameters.set(CameraParameters::KEY_SCENE_MODE, new_scene_mode_str);
             }
         }
+
+        // touch to focus
+        const char *new_focus_area = params.get(CameraParameters::KEY_FOCUS_AREAS);
+        if (new_focus_area != NULL) {
+            LOGI("focus area: %s", new_focus_area);
+            SecCameraArea area(new_focus_area);
+
+            if (!area.isDummy()) {
+                int width, height, frame_size;
+                mSecCamera->getPreviewSize(&width, &height, &frame_size);
+
+                int x = area.getX(width);
+                int y = area.getY(height);
+
+                LOGI("area=%s, x=%i, y=%i", area.toString8().string(), x, y);
+                if (mSecCamera->setObjectPosition(x, y) < 0) {
+                    LOGE("ERR(%s):Fail on mSecCamera->setObjectPosition(%s)", __func__, new_focus_area);
+                    ret = UNKNOWN_ERROR;
+                }
+            }
+
+            int val = area.isDummy() ? 0 : 1;
+        }
     } else {
         if (!isSupportedParameter(new_focus_mode_str,
                     mParameters.get(CameraParameters::KEY_SUPPORTED_FOCUS_MODES))) {
diff --git a/libcamera/SecCameraUtils.cpp b/libcamera/SecCameraUtils.cpp
new file mode 100644
index 0000000..c8dc8ee
--- /dev/null
+++ b/libcamera/SecCameraUtils.cpp
@@ -0,0 +1,72 @@
+/*
+**
+** Copyright 2011, Havlena Petr <havlenapetr@gmail.com>
+** Copyright 2011, The CyanogenMod Project
+**
+** Licensed under the Apache License, Version 2.0 (the "License");
+** you may not use this file except in compliance with the License.
+** You may obtain a copy of the License at
+**
+**     http://www.apache.org/licenses/LICENSE-2.0
+**
+** Unless required by applicable law or agreed to in writing, software
+** distributed under the License is distributed on an "AS IS" BASIS,
+** WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+** See the License for the specific language governing permissions and
+** limitations under the License.
+*/
+
+#include "SecCameraUtils.h"
+#include <stdlib.h>
+
+namespace android {
+
+SecCameraArea::SecCameraArea(int left, int top, int right, int bottom, int weight) :
+    m_left(left),
+    m_top(top),
+    m_right(right),
+    m_bottom(bottom),
+    m_weight(weight)
+{
+}
+
+SecCameraArea::SecCameraArea(const char* str) {
+    char* end;
+
+    if (str != NULL && str[0] == '(') {
+        m_left = (int)strtol(str+1, &end, 10);
+        if (*end != ',') goto error;
+        m_top = (int)strtol(end+1, &end, 10);
+        if (*end != ',') goto error;
+        m_right = (int)strtol(end+1, &end, 10);
+        if (*end != ',') goto error;
+        m_bottom = (int)strtol(end+1, &end, 10);
+        if (*end != ',') goto error;
+        m_weight = (int)strtol(end+1, &end, 10);
+        if (*end != ')') goto error;
+    }
+
+    return;
+
+error:
+    m_left = m_top = m_right = m_bottom = m_weight = 0;
+}
+
+int SecCameraArea::getX(int width) {
+    return (((m_left + m_right) / 2) + 1000) * width / 2000;
+}
+
+int SecCameraArea::getY(int height) {
+    return (((m_top + m_bottom) / 2) + 1000) * height / 2000;
+}
+
+bool SecCameraArea::isDummy() {
+    return m_left == 0 && m_top == 0 && m_right == 0 && m_bottom == 0;
+}
+
+String8 SecCameraArea::toString8() {
+    return String8::format("(%d,%d,%d,%d,%d)",
+        m_left, m_top, m_right, m_bottom, m_weight);
+}
+
+}
\ No newline at end of file
diff --git a/libcamera/SecCameraUtils.h b/libcamera/SecCameraUtils.h
new file mode 100644
index 0000000..ea7896f
--- /dev/null
+++ b/libcamera/SecCameraUtils.h
@@ -0,0 +1,44 @@
+/*
+**
+** Copyright 2011, Havlena Petr <havlenapetr@gmail.com>
+** Copyright 2011, The CyanogenMod Project
+**
+** Licensed under the Apache License, Version 2.0 (the "License");
+** you may not use this file except in compliance with the License.
+** You may obtain a copy of the License at
+**
+**     http://www.apache.org/licenses/LICENSE-2.0
+**
+** Unless required by applicable law or agreed to in writing, software
+** distributed under the License is distributed on an "AS IS" BASIS,
+** WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+** See the License for the specific language governing permissions and
+** limitations under the License.
+*/
+
+#ifndef ANDROID_HARDWARE_CAMERA_SEC_UTILS_H
+#define ANDROID_HARDWARE_CAMERA_SEC_UTILS_H
+
+#include <utils/String8.h>
+
+namespace android {
+
+struct SecCameraArea {
+    int m_left;
+    int m_top;
+    int m_right;
+    int m_bottom;
+    int m_weight;
+
+    SecCameraArea(int left = 0, int top = 0, int right = 0, int bottom = 0, int weight = 0);
+    SecCameraArea(const char* str);
+
+    int getX(int width);
+    int getY(int height);
+    bool isDummy();
+    String8 toString8();
+};
+
+}; // namespace android
+
+#endif // ANDROID_HARDWARE_CAMERA_SEC_UTILS_H
\ No newline at end of file