Cast: Adding support for GPU accelerated encode

media/cast/video_sender/video_sender.cc

 // Copyright 2013 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "media/cast/video_sender/video_sender.h"
 
 #include <list>
 
 #include "base/bind.h"
 #include "base/logging.h"
 #include "base/message_loop/message_loop.h"
 #include "crypto/encryptor.h"
 #include "crypto/symmetric_key.h"
 #include "media/cast/cast_defines.h"
 #include "media/cast/transport/pacing/paced_sender.h"
-#include "media/cast/video_sender/video_encoder.h"
+#include "media/cast/video_sender/external_video_encoder.h"
+#include "media/cast/video_sender/video_encoder_impl.h"
 
 namespace media {
 namespace cast {
 
 const int64 kMinSchedulingDelayMs = 1;
 
 class LocalRtcpVideoSenderFeedback : public RtcpSenderFeedback {
  public:
   explicit LocalRtcpVideoSenderFeedback(VideoSender* video_sender)
       : video_sender_(video_sender) {
@@ skipping 19 matching lines @@
     rtp_sender_->RtpStatistics(now, sender_info);
   }
 
  private:
   transport::RtpSender* rtp_sender_;
 };
 
 VideoSender::VideoSender(
     scoped_refptr<CastEnvironment> cast_environment,
     const VideoSenderConfig& video_config,
-    VideoEncoderController* const video_encoder_controller,
+    const scoped_refptr<GpuVideoAcceleratorFactories>& gpu_factories,
     transport::PacedPacketSender* const paced_packet_sender)
     : rtp_max_delay_(
           base::TimeDelta::FromMilliseconds(video_config.rtp_max_delay_ms)),
       max_frame_rate_(video_config.max_frame_rate),
       cast_environment_(cast_environment),
       rtcp_feedback_(new LocalRtcpVideoSenderFeedback(this)),
       rtp_sender_(new transport::RtpSender(cast_environment,
                                            NULL,
                                            &video_config,
                                            paced_packet_sender)),
@@ skipping 10 matching lines @@
       weak_factory_(this) {
   max_unacked_frames_ = static_cast<uint8>(video_config.rtp_max_delay_ms *
       video_config.max_frame_rate / 1000) + 1;
   VLOG(1) << "max_unacked_frames " << static_cast<int>(max_unacked_frames_);
   DCHECK_GT(max_unacked_frames_, 0) << "Invalid argument";
 
   rtp_video_sender_statistics_.reset(
       new LocalRtpVideoSenderStatistics(rtp_sender_.get()));
 
   if (video_config.use_external_encoder) {
-    DCHECK(video_encoder_controller) << "Invalid argument";
-    video_encoder_controller_ = video_encoder_controller;
+    video_encoder_.reset(new ExternalVideoEncoder(cast_environment,
+        video_config, gpu_factories));
   } else {
-    video_encoder_.reset(new VideoEncoder(cast_environment, video_config,
+    video_encoder_.reset(new VideoEncoderImpl(cast_environment, video_config,
         max_unacked_frames_));
-    video_encoder_controller_ = video_encoder_.get();
   }
 
   if (video_config.aes_iv_mask.size() == kAesKeySize &&
       video_config.aes_key.size() == kAesKeySize) {
     iv_mask_ = video_config.aes_iv_mask;
     encryption_key_.reset(crypto::SymmetricKey::Import(
         crypto::SymmetricKey::AES, video_config.aes_key));
     encryptor_.reset(new crypto::Encryptor());
     encryptor_->Init(encryption_key_.get(),
                      crypto::Encryptor::CTR,
                      std::string());
   } else if (video_config.aes_iv_mask.size() != 0 ||
              video_config.aes_key.size() != 0) {
-    DCHECK(false) << "Invalid crypto configuration";
+    NOTREACHED() << "Invalid crypto configuration";
   }
 
   rtcp_.reset(new Rtcp(
       cast_environment_,
       rtcp_feedback_.get(),
       paced_packet_sender,
       rtp_video_sender_statistics_.get(),
       NULL,
       video_config.rtcp_mode,
       base::TimeDelta::FromMilliseconds(video_config.rtcp_interval),
@@ skipping 23 matching lines @@
   base::TimeTicks now = cast_environment_->Clock()->NowTicks();
   cast_environment_->Logging()->InsertFrameEvent(now, kVideoFrameReceived,
       GetVideoRtpTimestamp(capture_time), kFrameIdUnknown);
 
   if (!video_encoder_->EncodeVideoFrame(video_frame, capture_time,
       base::Bind(&VideoSender::SendEncodedVideoFrameMainThread,
           weak_factory_.GetWeakPtr()))) {
   }
 }
 
-void VideoSender::InsertCodedVideoFrame(const EncodedVideoFrame* encoded_frame,
-                                        const base::TimeTicks& capture_time,
-                                        const base::Closure callback) {
-  DCHECK(!video_encoder_.get()) << "Invalid state";
-  DCHECK(encoded_frame) << "Invalid argument";
-  DCHECK(cast_environment_->CurrentlyOn(CastEnvironment::MAIN));
-
-  SendEncodedVideoFrame(encoded_frame, capture_time);
-  cast_environment_->PostTask(CastEnvironment::MAIN, FROM_HERE, callback);
-}
-
 void VideoSender::SendEncodedVideoFrameMainThread(
     scoped_ptr<EncodedVideoFrame> video_frame,
     const base::TimeTicks& capture_time) {
   SendEncodedVideoFrame(video_frame.get(), capture_time);
 }
 
 bool VideoSender::EncryptVideoFrame(const EncodedVideoFrame& video_frame,
                                     EncodedVideoFrame* encrypted_frame) {
   DCHECK(encryptor_) << "Invalid state";
 
@@ skipping 134 matching lines @@
 }
 
 void VideoSender::ResendCheck() {
   DCHECK(cast_environment_->CurrentlyOn(CastEnvironment::MAIN));
   if (!last_send_time_.is_null() && last_sent_frame_id_ != -1) {
     base::TimeDelta time_since_last_send =
        cast_environment_->Clock()->NowTicks() - last_send_time_;
     if (time_since_last_send > rtp_max_delay_) {
       if (last_acked_frame_id_ == -1) {
         // We have not received any ack, send a key frame.
-        video_encoder_controller_->GenerateKeyFrame();
+        video_encoder_->GenerateKeyFrame();
         last_acked_frame_id_ = -1;
         last_sent_frame_id_ = -1;
         UpdateFramesInFlight();
       } else {
         DCHECK_LE(0, last_acked_frame_id_);
 
         uint32 frame_id = static_cast<uint32>(last_acked_frame_id_ + 1);
         VLOG(1) << "ACK timeout resend frame:" << static_cast<int>(frame_id);
         ResendFrame(frame_id);
       }
@@ skipping 16 matching lines @@
   time_to_next = std::max(time_to_next,
       base::TimeDelta::FromMilliseconds(kMinSchedulingDelayMs));
 
   cast_environment_->PostDelayedTask(CastEnvironment::MAIN, FROM_HERE,
       base::Bind(&VideoSender::SkippedFramesCheck, weak_factory_.GetWeakPtr()),
                  time_to_next);
 }
 
 void VideoSender::SkippedFramesCheck() {
   DCHECK(cast_environment_->CurrentlyOn(CastEnvironment::MAIN));
-  int skip_count = video_encoder_controller_->NumberOfSkippedFrames();
+  int skip_count = video_encoder_->NumberOfSkippedFrames();
   if (skip_count - last_skip_count_ >
       kSkippedFramesThreshold * max_frame_rate_) {
       // TODO(pwestin): Propagate this up to the application.
   }
   last_skip_count_ = skip_count;
   last_checked_skip_count_time_ = cast_environment_->Clock()->NowTicks();
   ScheduleNextSkippedFramesCheck();
 }
 
 void VideoSender::OnReceivedCastFeedback(const RtcpCastMessage& cast_feedback) {
@@ skipping 11 matching lines @@
     rtt = std::max(rtt, avg_rtt);
   } else {
     // We have no measured value use default.
     rtt = base::TimeDelta::FromMilliseconds(kStartRttMs);
   }
   if (cast_feedback.missing_frames_and_packets_.empty()) {
     // No lost packets.
     int resend_frame = -1;
     if (last_sent_frame_id_ == -1) return;
 
-    video_encoder_controller_->LatestFrameIdToReference(
+    video_encoder_->LatestFrameIdToReference(
         cast_feedback.ack_frame_id_);
 
     if (static_cast<uint32>(last_acked_frame_id_ + 1) ==
         cast_feedback.ack_frame_id_) {
       uint32 new_bitrate = 0;
       if (congestion_control_.OnAck(rtt, &new_bitrate)) {
-        video_encoder_controller_->SetBitRate(new_bitrate);
+        video_encoder_->SetBitRate(new_bitrate);
       }
     }
     if (static_cast<uint32>(last_acked_frame_id_) == cast_feedback.ack_frame_id_
         // We only count duplicate ACKs when we have sent newer frames.
         && IsNewerFrameId(last_sent_frame_id_, last_acked_frame_id_)) {
       duplicate_ack_++;
     } else {
       duplicate_ack_ = 0;
     }
     if (duplicate_ack_ >= 2 && duplicate_ack_ % 3 == 2) {
       // Resend last ACK + 1 frame.
       resend_frame = static_cast<uint32>(last_acked_frame_id_ + 1);
     }
     if (resend_frame != -1) {
       DCHECK_LE(0, resend_frame);
       VLOG(1) << "Received duplicate ACK for frame:"
               << static_cast<int>(resend_frame);
       ResendFrame(static_cast<uint32>(resend_frame));
     }
   } else {
     rtp_sender_->ResendPackets(cast_feedback.missing_frames_and_packets_);
     last_send_time_ = now;
 
     uint32 new_bitrate = 0;
     if (congestion_control_.OnNack(rtt, &new_bitrate)) {
-      video_encoder_controller_->SetBitRate(new_bitrate);
+      video_encoder_->SetBitRate(new_bitrate);
     }
   }
   ReceivedAck(cast_feedback.ack_frame_id_);
 }
 
 void VideoSender::ReceivedAck(uint32 acked_frame_id) {
   DCHECK(cast_environment_->CurrentlyOn(CastEnvironment::MAIN));
   last_acked_frame_id_ = static_cast<int>(acked_frame_id);
   base::TimeTicks now = cast_environment_->Clock()->NowTicks();
   cast_environment_->Logging()->InsertGenericEvent(now, kAckReceived,
@@ skipping 11 matching lines @@
     if (last_acked_frame_id_ != -1) {
       DCHECK_LE(0, last_acked_frame_id_);
       frames_in_flight = static_cast<uint32>(last_sent_frame_id_) -
                          static_cast<uint32>(last_acked_frame_id_);
     } else {
       frames_in_flight = static_cast<uint32>(last_sent_frame_id_) + 1;
     }
     VLOG(1) << "Frames in flight; last sent: " << last_sent_frame_id_
             << " last acked:" << last_acked_frame_id_;
     if (frames_in_flight >= max_unacked_frames_) {
-      video_encoder_controller_->SkipNextFrame(true);
+      video_encoder_->SkipNextFrame(true);
       return;
     }
   }
-  video_encoder_controller_->SkipNextFrame(false);
+  video_encoder_->SkipNextFrame(false);
 }
 
 void VideoSender::ResendFrame(uint32 resend_frame_id) {
   DCHECK(cast_environment_->CurrentlyOn(CastEnvironment::MAIN));
   MissingFramesAndPacketsMap missing_frames_and_packets;
   PacketIdSet missing;
   missing_frames_and_packets.insert(std::make_pair(resend_frame_id, missing));
   rtp_sender_->ResendPackets(missing_frames_and_packets);
   last_send_time_ = cast_environment_->Clock()->NowTicks();
 }
 
 }  // namespace cast
 }  // namespace media