Return buffer in case of NULL callback from user

user's callback could be NULL while preview callback is running.
Add exception code for it.

[Version] 0.2.99
[Profile] Common
[Issue Type] Bug fix
[Dependency module] N/A
[Test] [M(T) - Boot=(OK), sdb=(OK), Home=(OK), Touch=(OK), Version=tizen-3.0-mobile_20170302.1]

Change-Id: I64b98241a728cc523c7518140d01df77c716ce62
Signed-off-by: Jeongmo Yang <jm80.yang@samsung.com>

1 files changed, 51 insertions, 27 deletions

diff --git a/src/camera.c b/src/camera.c
index 9ce9616..7d50534 100644
--- a/src/camera.c
+++ b/src/camera.c
@@ -1097,7 +1097,16 @@ static void _camera_client_user_callback(camera_cb_info_s *cb_info, char *recv_m
 		if (!(CHECK_PREVIEW_CB(cb_info, PREVIEW_CB_TYPE_EVAS)) &&
 			cb_info->user_cb[MUSE_CAMERA_EVENT_TYPE_PREVIEW] == NULL &&
 			cb_info->user_cb[MUSE_CAMERA_EVENT_TYPE_MEDIA_PACKET_PREVIEW] == NULL) {
-			LOGW("all preview callback from user are NULL");
+			/* return preview callback */
+			_camera_msg_send(MUSE_CAMERA_API_PREVIEW_CB_RETURN, cb_info, NULL, 0);
+
+			/* return buffer */
+			muse_camera_msg_get(tbm_key, recv_msg);
+			LOGW("all preview callback from user are NULL - return key %d", tbm_key);
+			if (tbm_key > 0) {
+				CAMERA_MSG_PARAM_SET(param, INT, tbm_key);
+				_camera_msg_send_param1(MUSE_CAMERA_API_RETURN_BUFFER, cb_info, NULL, &param, 0);
+			}
 			return;
 		}
 	} else if (cb_info->user_cb[event] == NULL) {
@@ -3796,13 +3805,14 @@ int camera_unset_preview_cb(camera_h camera)
 
 	LOGD("Enter");
 
-	pc->cb_info->user_cb[MUSE_CAMERA_EVENT_TYPE_PREVIEW] = NULL;
-	pc->cb_info->user_data[MUSE_CAMERA_EVENT_TYPE_PREVIEW] = NULL;
-
-	UNSET_PREVIEW_CB_TYPE(pc->cb_info, PREVIEW_CB_TYPE_USER);
-
 	_camera_msg_send(api, pc->cb_info, &ret, CAMERA_CB_TIMEOUT);
 
+	if (ret == CAMERA_ERROR_NONE) {
+		pc->cb_info->user_cb[MUSE_CAMERA_EVENT_TYPE_PREVIEW] = NULL;
+		pc->cb_info->user_data[MUSE_CAMERA_EVENT_TYPE_PREVIEW] = NULL;
+		UNSET_PREVIEW_CB_TYPE(pc->cb_info, PREVIEW_CB_TYPE_USER);
+	}
+
 	LOGD("ret : 0x%x", ret);
 
 	return ret;
@@ -3858,11 +3868,13 @@ int camera_unset_media_packet_preview_cb(camera_h camera)
 
 	LOGD("Enter");
 
-	pc->cb_info->user_cb[MUSE_CAMERA_EVENT_TYPE_MEDIA_PACKET_PREVIEW] = NULL;
-	pc->cb_info->user_data[MUSE_CAMERA_EVENT_TYPE_MEDIA_PACKET_PREVIEW] = NULL;
-
 	_camera_msg_send(api, pc->cb_info, &ret, CAMERA_CB_TIMEOUT);
 
+	if (ret == CAMERA_ERROR_NONE) {
+		pc->cb_info->user_cb[MUSE_CAMERA_EVENT_TYPE_MEDIA_PACKET_PREVIEW] = NULL;
+		pc->cb_info->user_data[MUSE_CAMERA_EVENT_TYPE_MEDIA_PACKET_PREVIEW] = NULL;
+	}
+
 	LOGD("ret : 0x%x", ret);
 
 	return ret;
@@ -3908,11 +3920,13 @@ int camera_unset_state_changed_cb(camera_h camera)
 
 	LOGD("Enter");
 
-	pc->cb_info->user_cb[MUSE_CAMERA_EVENT_TYPE_STATE_CHANGE] = NULL;
-	pc->cb_info->user_data[MUSE_CAMERA_EVENT_TYPE_STATE_CHANGE] = NULL;
-
 	_camera_msg_send(api, pc->cb_info, &ret, CAMERA_CB_TIMEOUT);
 
+	if (ret == CAMERA_ERROR_NONE) {
+		pc->cb_info->user_cb[MUSE_CAMERA_EVENT_TYPE_STATE_CHANGE] = NULL;
+		pc->cb_info->user_data[MUSE_CAMERA_EVENT_TYPE_STATE_CHANGE] = NULL;
+	}
+
 	LOGD("ret : 0x%x", ret);
 
 	return ret;
@@ -3958,11 +3972,13 @@ int camera_unset_interrupted_cb(camera_h camera)
 
 	LOGD("Enter");
 
-	pc->cb_info->user_cb[MUSE_CAMERA_EVENT_TYPE_INTERRUPTED] = NULL;
-	pc->cb_info->user_data[MUSE_CAMERA_EVENT_TYPE_INTERRUPTED] = NULL;
-
 	_camera_msg_send(api, pc->cb_info, &ret, CAMERA_CB_TIMEOUT);
 
+	if (ret == CAMERA_ERROR_NONE) {
+		pc->cb_info->user_cb[MUSE_CAMERA_EVENT_TYPE_INTERRUPTED] = NULL;
+		pc->cb_info->user_data[MUSE_CAMERA_EVENT_TYPE_INTERRUPTED] = NULL;
+	}
+
 	LOGD("ret : 0x%x", ret);
 
 	return ret;
@@ -4008,11 +4024,13 @@ int camera_unset_focus_changed_cb(camera_h camera)
 
 	LOGD("Enter");
 
-	pc->cb_info->user_cb[MUSE_CAMERA_EVENT_TYPE_FOCUS_CHANGE] = NULL;
-	pc->cb_info->user_data[MUSE_CAMERA_EVENT_TYPE_FOCUS_CHANGE] = NULL;
-
 	_camera_msg_send(api, pc->cb_info, &ret, CAMERA_CB_TIMEOUT);
 
+	if (ret == CAMERA_ERROR_NONE) {
+		pc->cb_info->user_cb[MUSE_CAMERA_EVENT_TYPE_FOCUS_CHANGE] = NULL;
+		pc->cb_info->user_data[MUSE_CAMERA_EVENT_TYPE_FOCUS_CHANGE] = NULL;
+	}
+
 	LOGD("ret : 0x%x", ret);
 
 	return ret;
@@ -4058,11 +4076,13 @@ int camera_unset_error_cb(camera_h camera)
 
 	LOGD("Enter");
 
-	pc->cb_info->user_cb[MUSE_CAMERA_EVENT_TYPE_ERROR] = NULL;
-	pc->cb_info->user_data[MUSE_CAMERA_EVENT_TYPE_ERROR] = NULL;
-
 	_camera_msg_send(api, pc->cb_info, &ret, CAMERA_CB_TIMEOUT);
 
+	if (ret == CAMERA_ERROR_NONE) {
+		pc->cb_info->user_cb[MUSE_CAMERA_EVENT_TYPE_ERROR] = NULL;
+		pc->cb_info->user_data[MUSE_CAMERA_EVENT_TYPE_ERROR] = NULL;
+	}
+
 	LOGD("ret : 0x%x", ret);
 
 	return ret;
@@ -5950,11 +5970,13 @@ int camera_attr_set_hdr_capture_progress_cb(camera_h camera, camera_attr_hdr_pro
 		return CAMERA_ERROR_INVALID_PARAMETER;
 	}
 
-	pc->cb_info->user_cb[MUSE_CAMERA_EVENT_TYPE_HDR_PROGRESS] = callback;
-	pc->cb_info->user_data[MUSE_CAMERA_EVENT_TYPE_HDR_PROGRESS] = user_data;
-
 	_camera_msg_send(api, pc->cb_info, &ret, CAMERA_CB_TIMEOUT);
 
+	if (ret == CAMERA_ERROR_NONE) {
+		pc->cb_info->user_cb[MUSE_CAMERA_EVENT_TYPE_HDR_PROGRESS] = callback;
+		pc->cb_info->user_data[MUSE_CAMERA_EVENT_TYPE_HDR_PROGRESS] = user_data;
+	}
+
 	LOGD("ret : 0x%x", ret);
 
 	return ret;
@@ -5974,11 +5996,13 @@ int camera_attr_unset_hdr_capture_progress_cb(camera_h camera)
 
 	LOGD("Enter");
 
-	pc->cb_info->user_cb[MUSE_CAMERA_EVENT_TYPE_HDR_PROGRESS] = NULL;
-	pc->cb_info->user_data[MUSE_CAMERA_EVENT_TYPE_HDR_PROGRESS] = NULL;
-
 	_camera_msg_send(api, pc->cb_info, &ret, CAMERA_CB_TIMEOUT);
 
+	if (ret == CAMERA_ERROR_NONE) {
+		pc->cb_info->user_cb[MUSE_CAMERA_EVENT_TYPE_HDR_PROGRESS] = NULL;
+		pc->cb_info->user_data[MUSE_CAMERA_EVENT_TYPE_HDR_PROGRESS] = NULL;
+	}
+
 	LOGD("ret : 0x%x", ret);
 
 	return ret;