[EXPERIMENTAL] Generic stereo codec with index header sending single frames

modules/video_coding/codecs/stereo/include/stereo_decoder_adapter.h

+/*
+ *  Copyright (c) 2017 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_MODULES_VIDEO_CODING_CODECS_ALPHA_INCLUDE_ALPHA_DECODER_ADAPTER_H_
+#define WEBRTC_MODULES_VIDEO_CODING_CODECS_ALPHA_INCLUDE_ALPHA_DECODER_ADAPTER_H_
+
+#include <map>
+#include <memory>
+#include <vector>
+
+#include "api/video_codecs/video_decoder.h"
+#include "media/engine/webrtcvideodecoderfactory.h"
+#include "modules/video_coding/codecs/stereo/include/stereo_encoder_adapter.h"
+
+namespace webrtc {
+
+class StereoDecoderAdapter : public VideoDecoder {
+ public:
+  explicit StereoDecoderAdapter(cricket::WebRtcVideoDecoderFactory* factory);
+  virtual ~StereoDecoderAdapter();
+
+  // Implements VideoDecoder
+  int32_t InitDecode(const VideoCodec* codec_settings,
+                     int32_t number_of_cores) override;
+  int32_t Decode(const EncodedImage& input_image,
+                 bool missing_frames,
+                 const RTPFragmentationHeader* fragmentation,
+                 const CodecSpecificInfo* codec_specific_info = NULL,
+                 int64_t render_time_ms = -1) override;
+  int32_t RegisterDecodeCompleteCallback(
+      DecodedImageCallback* callback) override;
+  int32_t Release() override;
+
+  void Decoded(StereoCodecStream stream_idx,
+               VideoFrame& decoded_image,
+               rtc::Optional<int32_t> decode_time_ms,
+               rtc::Optional<uint8_t> qp);
+
+ private:
+  // Wrapper class that redirects Decoded() calls.
+  class AdapterDecodedImageCallback;
+
+  // Holds the decoded image output of a frame.
+  struct DecodedImageData;
+
+  void MergeDecodedImages(VideoFrame& decoded_image,
+                          const rtc::Optional<int32_t>& decode_time_ms,
+                          const rtc::Optional<uint8_t>& qp,
+                          VideoFrame& stereo_decoded_image,
+                          const rtc::Optional<int32_t>& stereo_decode_time_ms,
+                          const rtc::Optional<uint8_t>& stereo_qp);
+
+  cricket::WebRtcVideoDecoderFactory* const factory_;
+  std::vector<std::unique_ptr<VideoDecoder>> decoders_;
+  std::vector<std::unique_ptr<AdapterDecodedImageCallback>> adapter_callbacks_;
+  DecodedImageCallback* decoded_complete_callback_;
+
+  // Holds YUV or AXX decode output of a frame that is identified by timestamp.
+  std::map<uint32_t /* timestamp */, DecodedImageData> decoded_data_;
+};
+
+}  // namespace webrtc
+
+#endif  // WEBRTC_MODULES_VIDEO_CODING_CODECS_ALPHA_INCLUDE_ALPHA_DECODER_ADAPTER_H_