Move all codec specific definitions from modules_include

webrtc/modules/video_coding/codecs/interface/common_constants.h

+/*
+ *  Copyright (c) 2016 The WebRTC project authors. All Rights Reserved.
+ *
+ *  Use of this source code is governed by a BSD-style license
+ *  that can be found in the LICENSE file in the root of the source
+ *  tree. An additional intellectual property rights grant can be found
+ *  in the file PATENTS.  All contributing project authors may
+ *  be found in the AUTHORS file in the root of the source tree.
+ */
+
+// This file contains constants that are used by multiple global
+// codec definitions (modules/video_coding/codecs/*/include/*_globals.h)
+
+#ifndef WEBRTC_MODULES_VIDEO_CODING_CODECS_INTERFACE_COMMON_CONSTANTS_H_
+#define WEBRTC_MODULES_VIDEO_CODING_CODECS_INTERFACE_COMMON_CONSTANTS_H_
+
+namespace webrtc {
+
+const int16_t kNoPictureId = -1;
+const int16_t kNoTl0PicIdx = -1;
+const uint8_t kNoTemporalIdx = 0xFF;
+const int kNoKeyIdx = -1;
+
+}  // namespace webrtc
+
+#endif  // WEBRTC_MODULES_VIDEO_CODING_CODECS_INTERFACE_COMMON_CONSTANTS_H_