camera: Add support for exposure time

* Add supported slow shutter speeds
* Enabled only in back camera, front doesn't seem to support this
* Disable flash when slow shutter is enabled

Change-Id: I9bdcab11990a97cd67654e1e671f0383752e92d6

1 files changed, 38 insertions, 0 deletions

diff --git a/camera/CameraWrapper.cpp b/camera/CameraWrapper.cpp
index f8c785d..c883657 100644
--- a/camera/CameraWrapper.cpp
+++ b/camera/CameraWrapper.cpp
@@ -94,8 +94,14 @@ static int check_vendor_module()
     return rv;
 }
 
+static const char *KEY_EXPOSURE_TIME = "exposure-time";
+static const char *KEY_EXPOSURE_TIME_VALUES = "exposure-time-values";
+
 static char *camera_fixup_getparams(int id, const char *settings)
 {
+    bool videoMode = false;
+    const char *exposureTimeValues = "0,1,500000,1000000,2000000,4000000,8000000,16000000,32000000,64000000";
+
     android::CameraParameters params;
     params.unflatten(android::String8(settings));
 
@@ -104,6 +110,17 @@ static char *camera_fixup_getparams(int id, const char *settings)
     params.dump();
 #endif
 
+    if (params.get(android::CameraParameters::KEY_RECORDING_HINT)) {
+        videoMode = (!strcmp(params.get(android::CameraParameters::KEY_RECORDING_HINT), "true"));
+    }
+
+    /* Set supported exposure time values */
+    if (!videoMode) {
+        if (id == 0) {
+            params.set(KEY_EXPOSURE_TIME_VALUES, exposureTimeValues);
+        }
+    }
+
 #if !LOG_NDEBUG
     ALOGV("%s: fixed parameters:", __FUNCTION__);
     params.dump();
@@ -117,6 +134,9 @@ static char *camera_fixup_getparams(int id, const char *settings)
 
 static char *camera_fixup_setparams(int id, const char *settings)
 {
+    bool videoMode = false;
+    bool slowShutterMode = false;
+
     android::CameraParameters params;
     params.unflatten(android::String8(settings));
 
@@ -125,6 +145,24 @@ static char *camera_fixup_setparams(int id, const char *settings)
     params.dump();
 #endif
 
+    if (params.get(android::CameraParameters::KEY_RECORDING_HINT)) {
+        videoMode = (!strcmp(params.get(android::CameraParameters::KEY_RECORDING_HINT), "true"));
+    }
+
+    if (params.get(KEY_EXPOSURE_TIME)) {
+        slowShutterMode = (strcmp(params.get(KEY_EXPOSURE_TIME), "0"));
+    }
+
+    /* Disable flash if slow shutter is enabled */
+    if (!videoMode) {
+        if (id == 0) {
+            if (slowShutterMode) {
+                params.set(android::CameraParameters::KEY_FLASH_MODE,
+                        android::CameraParameters::FLASH_MODE_OFF);
+            }
+        }
+    }
+
 #if !LOG_NDEBUG
     ALOGV("%s: fixed parameters:", __FUNCTION__);
     params.dump();