[osal]: add environment detection function

1. add software runtime detection
2. add hardware platform detection

Change-Id: I75736ae85130325029023d948e4d756e27953af8
Signed-off-by: Herman Chen <herman.chen@rock-chips.com>

osal/mpp_platform.cpp

@@ -0,0 +1,62 @@
+/*
+ * Copyright 2015 Rockchip Electronics Co. LTD
+ *
+ * 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 <unistd.h>
+
+#include "mpp_platform.h"
+
+RK_U32 mpp_get_vcodec_hw_flag(void)
+{
+    RK_U32 flag = 0;
+
+#ifdef RKPLATFORM
+    /* NOTE: current only support vpu2 */
+    if (!access("/dev/vpu_service", F_OK))
+        flag |= HAVE_VPU2;
+
+    /* for rk3288 / rk3368 /rk312x hevc decoder */
+    if (!access("/dev/hevc_service", F_OK))
+        flag |= HAVE_HEVC_DEC;
+
+    /* for rk3228 / rk3229 / rk3399 decoder */
+    if (!access("/dev/rkvdec", F_OK))
+        flag |= HAVE_RKVDEC;
+
+    /* for rk1108 encoder */
+    if (!access("/dev/rkvenc", F_OK))
+        flag |= HAVE_RKVENC;
+#endif
+
+    return flag;
+}
+
+RK_U32 mpp_get_2d_hw_flag(void)
+{
+    RK_U32 flag = 0;
+
+#ifdef RKPLATFORM
+
+    if (!access("/dev/rga", F_OK))
+        flag |= HAVE_RGA;
+
+    if (!access("/dev/iep", F_OK))
+        flag |= HAVE_IEP;
+#endif
+
+    return flag;
+}
+
+