Reland of Prepare for injectable SW decoders

webrtc/media/engine/webrtcvideoengine.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.
  */
 
 #ifndef WEBRTC_MEDIA_ENGINE_WEBRTCVIDEOENGINE_H_
 #define WEBRTC_MEDIA_ENGINE_WEBRTCVIDEOENGINE_H_
 
 #include <map>
 #include <memory>
 #include <set>
 #include <string>
 #include <vector>
 
 #include "webrtc/api/call/transport.h"
 #include "webrtc/api/optional.h"
 #include "webrtc/api/video/video_frame.h"
+#include "webrtc/api/video_codecs/sdp_video_format.h"
 #include "webrtc/call/call.h"
 #include "webrtc/call/flexfec_receive_stream.h"
 #include "webrtc/call/video_receive_stream.h"
 #include "webrtc/call/video_send_stream.h"
 #include "webrtc/media/base/mediaengine.h"
 #include "webrtc/media/base/videosinkinterface.h"
 #include "webrtc/media/base/videosourceinterface.h"
 #include "webrtc/media/engine/webrtcvideodecoderfactory.h"
 #include "webrtc/media/engine/webrtcvideoencoderfactory.h"
 #include "webrtc/rtc_base/asyncinvoker.h"
 #include "webrtc/rtc_base/criticalsection.h"
 #include "webrtc/rtc_base/networkroute.h"
 #include "webrtc/rtc_base/thread_annotations.h"
 #include "webrtc/rtc_base/thread_checker.h"
 
 namespace webrtc {
 class VideoDecoder;
 class VideoEncoder;
 struct MediaConfig;
 }
 
 namespace rtc {
 class Thread;
 }  // namespace rtc
 
 namespace cricket {
 
+class DecoderFactoryAdapter;
 class EncoderFactoryAdapter;
 class VideoCapturer;
 class VideoProcessor;
 class VideoRenderer;
 class VoiceMediaChannel;
 class WebRtcDecoderObserver;
 class WebRtcEncoderObserver;
 class WebRtcLocalStreamInfo;
 class WebRtcRenderAdapter;
 class WebRtcVideoChannel;
@@ skipping 54 matching lines @@
   void SetExternalDecoderFactory(WebRtcVideoDecoderFactory* decoder_factory);
   // Set a WebRtcVideoEncoderFactory for external encoding. Video engine does
   // not take the ownership of |encoder_factory|. The caller needs to make sure
   // that |encoder_factory| outlives the video engine.
   virtual void SetExternalEncoderFactory(
       WebRtcVideoEncoderFactory* encoder_factory);
 
  private:
   bool initialized_;
 
-  WebRtcVideoDecoderFactory* external_decoder_factory_;
+  std::unique_ptr<DecoderFactoryAdapter> decoder_factory_;
   std::unique_ptr<EncoderFactoryAdapter> encoder_factory_;
 };
 
 class WebRtcVideoChannel : public VideoMediaChannel, public webrtc::Transport {
  public:
   WebRtcVideoChannel(webrtc::Call* call,
                      const MediaConfig& config,
                      const VideoOptions& options,
                      const EncoderFactoryAdapter& encoder_factory,
-                     WebRtcVideoDecoderFactory* external_decoder_factory);
+                     const DecoderFactoryAdapter& decoder_factory);
   ~WebRtcVideoChannel() override;
 
   // VideoMediaChannel implementation
   rtc::DiffServCodePoint PreferredDscp() const override;
 
   bool SetSendParameters(const VideoSendParameters& params) override;
   bool SetRecvParameters(const VideoRecvParameters& params) override;
   webrtc::RtpParameters GetRtpSendParameters(uint32_t ssrc) const override;
   bool SetRtpSendParameters(uint32_t ssrc,
                             const webrtc::RtpParameters& parameters) override;
@@ skipping 217 matching lines @@
 
   // Wrapper for the receiver part, contains configs etc. that are needed to
   // reconstruct the underlying VideoReceiveStream.
   class WebRtcVideoReceiveStream
       : public rtc::VideoSinkInterface<webrtc::VideoFrame> {
    public:
     WebRtcVideoReceiveStream(
         webrtc::Call* call,
         const StreamParams& sp,
         webrtc::VideoReceiveStream::Config config,
-        WebRtcVideoDecoderFactory* external_decoder_factory,
+        const DecoderFactoryAdapter& decoder_factory,
         bool default_stream,
         const std::vector<VideoCodecSettings>& recv_codecs,
         const webrtc::FlexfecReceiveStream::Config& flexfec_config);
     ~WebRtcVideoReceiveStream();
 
     const std::vector<uint32_t>& GetSsrcs() const;
     rtc::Optional<uint32_t> GetFirstPrimarySsrc() const;
 
     void SetLocalSsrc(uint32_t local_ssrc);
     // TODO(deadbeef): Move these feedback parameters into the recv parameters.
     void SetFeedbackParameters(bool nack_enabled,
                                bool remb_enabled,
                                bool transport_cc_enabled,
                                webrtc::RtcpMode rtcp_mode);
     void SetRecvParameters(const ChangedRecvParameters& recv_params);
 
     void OnFrame(const webrtc::VideoFrame& frame) override;
     bool IsDefaultStream() const;
 
     void SetSink(rtc::VideoSinkInterface<webrtc::VideoFrame>* sink);
 
     VideoReceiverInfo GetVideoReceiverInfo(bool log_stats);
 
    private:
-    struct AllocatedDecoder {
-      AllocatedDecoder(webrtc::VideoDecoder* decoder,
-                       webrtc::VideoCodecType type,
-                       bool external);
-      webrtc::VideoDecoder* decoder;
-      // Decoder wrapped into a fallback decoder to permit software fallback.
-      webrtc::VideoDecoder* external_decoder;
-      webrtc::VideoCodecType type;
-      bool external;
+    struct SdpVideoFormatCompare {
+      bool operator()(const webrtc::SdpVideoFormat& lhs,
+                      const webrtc::SdpVideoFormat& rhs) const {
+        return std::tie(lhs.name, lhs.parameters) <
+               std::tie(rhs.name, rhs.parameters);
+      }
     };
+    typedef std::map<webrtc::SdpVideoFormat,
+                     std::unique_ptr<webrtc::VideoDecoder>,
+                     SdpVideoFormatCompare>
+        DecoderMap;
 
     void RecreateWebRtcVideoStream();
     void MaybeRecreateWebRtcFlexfecStream();
 
     void MaybeAssociateFlexfecWithVideo();
     void MaybeDissociateFlexfecFromVideo();
 
     void ConfigureCodecs(const std::vector<VideoCodecSettings>& recv_codecs,
-                         std::vector<AllocatedDecoder>* old_codecs);
+                         DecoderMap* old_codecs);
     void ConfigureFlexfecCodec(int flexfec_payload_type);
-    AllocatedDecoder CreateOrReuseVideoDecoder(
-        std::vector<AllocatedDecoder>* old_decoder,
-        const VideoCodec& codec);
-    void ClearDecoders(std::vector<AllocatedDecoder>* allocated_decoders);
 
     std::string GetCodecNameFromPayloadType(int payload_type);
 
     webrtc::Call* const call_;
     StreamParams stream_params_;
 
     // Both |stream_| and |flexfec_stream_| are managed by |this|. They are
     // destroyed by calling call_->DestroyVideoReceiveStream and
     // call_->DestroyFlexfecReceiveStream, respectively.
     webrtc::VideoReceiveStream* stream_;
     const bool default_stream_;
     webrtc::VideoReceiveStream::Config config_;
     webrtc::FlexfecReceiveStream::Config flexfec_config_;
     webrtc::FlexfecReceiveStream* flexfec_stream_;
 
-    WebRtcVideoDecoderFactory* const external_decoder_factory_;
-    std::vector<AllocatedDecoder> allocated_decoders_;
+    std::unique_ptr<DecoderFactoryAdapter> decoder_factory_;
+    DecoderMap allocated_decoders_;
 
     rtc::CriticalSection sink_lock_;
     rtc::VideoSinkInterface<webrtc::VideoFrame>* sink_
         RTC_GUARDED_BY(sink_lock_);
     // Expands remote RTP timestamps to int64_t to be able to estimate how long
     // the stream has been running.
     rtc::TimestampWrapAroundHandler timestamp_wraparound_handler_
         RTC_GUARDED_BY(sink_lock_);
     int64_t first_frame_timestamp_ RTC_GUARDED_BY(sink_lock_);
     // Start NTP time is estimated as current remote NTP time (estimated from
@@ skipping 43 matching lines @@
       RTC_GUARDED_BY(stream_crit_);
   std::map<uint32_t, WebRtcVideoReceiveStream*> receive_streams_
       RTC_GUARDED_BY(stream_crit_);
   std::set<uint32_t> send_ssrcs_ RTC_GUARDED_BY(stream_crit_);
   std::set<uint32_t> receive_ssrcs_ RTC_GUARDED_BY(stream_crit_);
 
   rtc::Optional<VideoCodecSettings> send_codec_;
   rtc::Optional<std::vector<webrtc::RtpExtension>> send_rtp_extensions_;
 
   std::unique_ptr<EncoderFactoryAdapter> encoder_factory_;
-  WebRtcVideoDecoderFactory* const external_decoder_factory_;
+  std::unique_ptr<DecoderFactoryAdapter> decoder_factory_;
   std::vector<VideoCodecSettings> recv_codecs_;
   std::vector<webrtc::RtpExtension> recv_rtp_extensions_;
   // See reason for keeping track of the FlexFEC payload type separately in
   // comment in WebRtcVideoChannel::ChangedRecvParameters.
   int recv_flexfec_payload_type_;
   webrtc::Call::Config::BitrateConfig bitrate_config_;
   // TODO(deadbeef): Don't duplicate information between
   // send_params/recv_params, rtp_extensions, options, etc.
   VideoSendParameters send_params_;
   VideoOptions default_send_options_;
@@ skipping 19 matching lines @@
   const std::string codec_name_;
   const int max_qp_;
   const int max_framerate_;
   const bool is_screencast_;
   const bool conference_mode_;
 };
 
 }  // namespace cricket
 
 #endif  // WEBRTC_MEDIA_ENGINE_WEBRTCVIDEOENGINE_H_