Revert of Stop using hardcoded payload types for video codecs

webrtc/video/video_encoder.cc

Index: webrtc/video/video_encoder.cc
diff --git a/webrtc/video/video_encoder.cc b/webrtc/video/video_encoder.cc
new file mode 100644
index 0000000000000000000000000000000000000000..f4e8156528bc288fb300bf2daed4461a3ec668d0
--- /dev/null
+++ b/webrtc/video/video_encoder.cc
@@ -0,0 +1,67 @@
+/*
+ *  Copyright (c) 2015 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.
+ */
+
+#include "webrtc/video_encoder.h"
+
+#include "webrtc/base/checks.h"
+#include "webrtc/base/logging.h"
+#include "webrtc/modules/video_coding/codecs/h264/include/h264.h"
+#include "webrtc/modules/video_coding/codecs/vp8/include/vp8.h"
+#include "webrtc/modules/video_coding/codecs/vp9/include/vp9.h"
+
+namespace webrtc {
+VideoEncoder* VideoEncoder::Create(VideoEncoder::EncoderType codec_type) {
+  RTC_DCHECK(IsSupportedSoftware(codec_type));
+  switch (codec_type) {
+    case kH264:
+      return H264Encoder::Create();
+    case kVp8:
+      return VP8Encoder::Create();
+    case kVp9:
+      return VP9Encoder::Create();
+    case kUnsupportedCodec:
+      RTC_NOTREACHED();
+      return nullptr;
+  }
+  RTC_NOTREACHED();
+  return nullptr;
+}
+
+bool VideoEncoder::IsSupportedSoftware(EncoderType codec_type) {
+  switch (codec_type) {
+    case kH264:
+      return H264Encoder::IsSupported();
+    case kVp8:
+      return true;
+    case kVp9:
+      return VP9Encoder::IsSupported();
+    case kUnsupportedCodec:
+      RTC_NOTREACHED();
+      return false;
+  }
+  RTC_NOTREACHED();
+  return false;
+}
+
+VideoEncoder::EncoderType VideoEncoder::CodecToEncoderType(
+    VideoCodecType codec_type) {
+  switch (codec_type) {
+    case kVideoCodecH264:
+      return VideoEncoder::kH264;
+    case kVideoCodecVP8:
+      return VideoEncoder::kVp8;
+    case kVideoCodecVP9:
+      return VideoEncoder::kVp9;
+    default:
+      return VideoEncoder::kUnsupportedCodec;
+  }
+}
+
+}  // namespace webrtc