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Side by Side Diff: remoting/protocol/webrtc_video_encoder_factory.h

Issue 2329653002: Add WebrtcVideoEncoder interface (Closed)
Patch Set: win Created 4 years, 3 months ago
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1 // Copyright 2016 The Chromium Authors. All rights reserved.
2 // Use of this source code is governed by a BSD-style license that can be
3 // found in the LICENSE file.
4
5 #ifndef REMOTING_PROTOCOL_WEBRTC_VIDEO_ENCODER_FACTORY_H_
6 #define REMOTING_PROTOCOL_WEBRTC_VIDEO_ENCODER_FACTORY_H_
7
8 #include <memory>
9 #include <vector>
10
11 #include "base/callback.h"
12 #include "base/synchronization/lock.h"
13 #include "remoting/proto/video.pb.h"
14 #include "third_party/webrtc/media/engine/webrtcvideoencoderfactory.h"
15 #include "third_party/webrtc/modules/video_coding/include/video_codec_interface. h"
16
17 namespace remoting {
18
19 using TargetBitrateCallback = base::Callback<void(int)>;
20
21 // This is the interface between the Webrtc engine and the external encoder
22 // provided by remoting. Webrtc provides feedback on network bandwidth, latency
23 // & RTT and in turn remoting passes encoded frames as they get encoded
24 // through the capture pipeline.
25 class WebrtcVideoEncoder : public webrtc::VideoEncoder {
26 public:
27 enum State { kUninitialized = 0, kInitialized };
28 explicit WebrtcVideoEncoder(webrtc::VideoCodecType codec);
29 ~WebrtcVideoEncoder() override;
30
31 // webrtc::VideoEncoder overrides
32 int32_t InitEncode(const webrtc::VideoCodec* codec_settings,
33 int32_t number_of_cores,
34 size_t max_payload_size) override;
35 int32_t RegisterEncodeCompleteCallback(
36 webrtc::EncodedImageCallback* callback) override;
37 int32_t Release() override;
38 int32_t Encode(const webrtc::VideoFrame& frame,
39 const webrtc::CodecSpecificInfo* codec_specific_info,
40 const std::vector<webrtc::FrameType>* frame_types) override;
41 int32_t SetChannelParameters(uint32_t packet_loss, int64_t rtt) override;
42 int32_t SetRates(uint32_t bitrate, uint32_t framerate) override;
43
44 webrtc::EncodedImageCallback::Result SendEncodedFrame(
45 std::unique_ptr<VideoPacket> packet,
46 base::TimeTicks capture_time);
47 void SetKeyFrameRequestCallback(const base::Closure& key_frame_request);
48 void SetTargetBitrateCallback(const TargetBitrateCallback& target_bitrate_cb);
49
50 private:
51 // Protects |encoded_callback_|, |key_frame_request_|,
52 // |target_bitrate_cb_| and |state_|.
53 base::Lock lock_;
54 State state_;
55 webrtc::EncodedImageCallback* encoded_callback_;
56
57 base::Closure key_frame_request_;
58 TargetBitrateCallback target_bitrate_cb_;
59 webrtc::VideoCodecType video_codec_type_;
60 };
61
62 // This is the external encoder factory implementation that is passed to
63 // WebRTC at the time of creation of peer connection. The external encoder
64 // factory primarily manages creation and destruction of encoder.
65 class WebrtcVideoEncoderFactory : public cricket::WebRtcVideoEncoderFactory {
66 public:
67 WebrtcVideoEncoderFactory();
68 ~WebrtcVideoEncoderFactory() override;
69
70 webrtc::VideoEncoder* CreateVideoEncoder(
71 webrtc::VideoCodecType type) override;
72 const std::vector<cricket::WebRtcVideoEncoderFactory::VideoCodec>& codecs()
73 const override;
74
75 // Returns true to directly provide encoded frames to webrtc
76 bool EncoderTypeHasInternalSource(webrtc::VideoCodecType type) const override;
77 void DestroyVideoEncoder(webrtc::VideoEncoder* encoder) override;
78
79 webrtc::EncodedImageCallback::Result SendEncodedFrame(
80 std::unique_ptr<VideoPacket> packet,
81 base::TimeTicks capture_time);
82
83 void SetKeyFrameRequestCallback(const base::Closure& key_frame_request);
84 void SetTargetBitrateCallback(const TargetBitrateCallback& target_bitrate_cb);
85
86 private:
87 // Protects |key_frame_request_| and |target_bitrate_cb_|.
88 base::Lock lock_;
89 base::Closure key_frame_request_;
90 TargetBitrateCallback target_bitrate_cb_;
91 std::vector<cricket::WebRtcVideoEncoderFactory::VideoCodec> codecs_;
92 std::vector<std::unique_ptr<WebrtcVideoEncoder>> encoders_;
93 };
94
95 } // namespace remoting
96
97 #endif // REMOTING_PROTOCOL_WEBRTC_VIDEO_ENCODER_FACTORY_H_
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