Revert 7151 "Revert 7114 "Expose VideoEncoders with webrtc/video_encoder.h.""

Re-lands r7114 after landing r7204 to adress the compile error causing
the rollback in r7151.

BUG=3070
TBR=henrikg@webrtc.org

Review URL: https://webrtc-codereview.appspot.com/28489004

git-svn-id: http://webrtc.googlecode.com/svn/trunk@7207 4adac7df-926f-26a2-2b94-8c16560cd09d

1 files changed, 70 insertions, 0 deletions

diff --git a/webrtc/video_encoder.h b/webrtc/video_encoder.h
new file mode 100644
index 0000000000..6d57d9264b
--- /dev/null
+++ b/webrtc/video_encoder.h
@@ -0,0 +1,70 @@
+/*
+ *  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.
+ */
+
+#ifndef WEBRTC_VIDEO_ENCODER_H_
+#define WEBRTC_VIDEO_ENCODER_H_
+
+#include <vector>
+
+#include "webrtc/typedefs.h"
+#include "webrtc/video_frame.h"
+
+namespace webrtc {
+
+class RTPFragmentationHeader;
+// TODO(pbos): Expose these through a public (root) header or change these APIs.
+struct CodecSpecificInfo;
+struct VideoCodec;
+
+class EncodedImageCallback {
+ public:
+  virtual ~EncodedImageCallback() {}
+
+  // Callback function which is called when an image has been encoded.
+  // TODO(pbos): Make encoded_image const or pointer. Remove default arguments.
+  virtual int32_t Encoded(
+      EncodedImage& encoded_image,
+      const CodecSpecificInfo* codec_specific_info = NULL,
+      const RTPFragmentationHeader* fragmentation = NULL) = 0;
+};
+
+class VideoEncoder {
+ public:
+  enum EncoderType {
+    kVp8,
+  };
+
+  static VideoEncoder* Create(EncoderType codec_type);
+
+  virtual ~VideoEncoder() {}
+
+  virtual int32_t InitEncode(const VideoCodec* codec_settings,
+                             int32_t number_of_cores,
+                             uint32_t max_payload_size) = 0;
+  virtual int32_t RegisterEncodeCompleteCallback(
+      EncodedImageCallback* callback) = 0;
+  virtual int32_t Release() = 0;
+
+
+  virtual int32_t Encode(const I420VideoFrame& frame,
+                         const CodecSpecificInfo* codec_specific_info,
+                         const std::vector<VideoFrameType>* frame_types) = 0;
+
+  virtual int32_t SetChannelParameters(uint32_t packet_loss, int rtt) = 0;
+  virtual int32_t SetRates(uint32_t bitrate, uint32_t framerate) = 0;
+
+  virtual int32_t SetPeriodicKeyFrames(bool enable) { return -1; }
+  virtual int32_t CodecConfigParameters(uint8_t* /*buffer*/, int32_t /*size*/) {
+    return -1;
+  }
+};
+
+}  // namespace webrtc
+#endif  // WEBRTC_VIDEO_ENCODER_H_