Revert of Stop using hardcoded payload types for video codecs

webrtc/video_encoder.h

 /*
  *  Copyright (c) 2014 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.
  */
 
@@ skipping 45 matching lines @@
 
   // Callback function which is called when an image has been encoded.
   virtual Result OnEncodedImage(
       const EncodedImage& encoded_image,
       const CodecSpecificInfo* codec_specific_info,
       const RTPFragmentationHeader* fragmentation) = 0;
 };
 
 class VideoEncoder {
  public:
+  enum EncoderType {
+    kH264,
+    kVp8,
+    kVp9,
+    kUnsupportedCodec,
+  };
+
+  static VideoEncoder* Create(EncoderType codec_type);
+  // Returns true if this type of encoder can be created using
+  // VideoEncoder::Create.
+  static bool IsSupportedSoftware(EncoderType codec_type);
+  static EncoderType CodecToEncoderType(VideoCodecType codec_type);
+
   static VideoCodecVP8 GetDefaultVp8Settings();
   static VideoCodecVP9 GetDefaultVp9Settings();
   static VideoCodecH264 GetDefaultH264Settings();
 
   virtual ~VideoEncoder() {}
 
   // Initialize the encoder with the information from the codecSettings
   //
   // Input:
   //          - codec_settings    : Codec settings
@@ skipping 73 matching lines @@
   }
 
   virtual int32_t SetPeriodicKeyFrames(bool enable) { return -1; }
   virtual void OnDroppedFrame() {}
   virtual bool SupportsNativeHandle() const { return false; }
   virtual const char* ImplementationName() const { return "unknown"; }
 };
 
 }  // namespace webrtc
 #endif  // WEBRTC_VIDEO_ENCODER_H_