2 * Copyright (c) 2013 The WebRTC project authors. All Rights Reserved.
4 * Use of this source code is governed by a BSD-style license
5 * that can be found in the LICENSE file in the root of the source
6 * tree. An additional intellectual property rights grant can be found
7 * in the file PATENTS. All contributing project authors may
8 * be found in the AUTHORS file in the root of the source tree.
11 #ifndef WEBRTC_VIDEO_RECEIVE_STREAM_H_
12 #define WEBRTC_VIDEO_RECEIVE_STREAM_H_
18 #include "webrtc/common_types.h"
19 #include "webrtc/config.h"
20 #include "webrtc/frame_callback.h"
21 #include "webrtc/transport.h"
22 #include "webrtc/video_renderer.h"
27 // RTCP mode to use. Compound mode is described by RFC 4585 and reduced-size
28 // RTCP mode is described by RFC 5506.
29 enum RtcpMode { kRtcpCompound, kRtcpReducedSize };
34 class VideoReceiveStream {
36 // TODO(mflodman) Move all these settings to VideoDecoder and move the
37 // declaration to common_types.h.
43 expected_delay_ms(0) {}
45 // The actual decoder instance.
46 VideoDecoder* decoder;
48 // Received RTP packets with this payload type will be sent to this decoder
52 // Name of the decoded payload (such as VP8). Maps back to the depacketizer
53 // used to unpack incoming packets.
54 std::string payload_name;
56 // 'true' if the decoder handles rendering as well.
59 // The expected delay for decoding and rendering, i.e. the frame will be
60 // delivered this many milliseconds, if possible, earlier than the ideal
62 // Note: Ignored if 'renderer' is false.
63 int expected_delay_ms;
66 struct Stats : public SsrcStats {
68 : network_frame_rate(0),
75 int network_frame_rate;
76 int decode_frame_rate;
77 int render_frame_rate;
79 int discarded_packets;
89 pre_decode_callback(NULL),
90 pre_render_callback(NULL),
93 // Decoders for every payload that we can receive.
94 std::vector<Decoder> decoders;
96 // Receive-stream specific RTP settings.
101 rtcp_mode(newapi::kRtcpReducedSize),
104 // Synchronization source (stream identifier) to be received.
105 uint32_t remote_ssrc;
106 // Sender SSRC used for sending RTCP (such as receiver reports).
109 // See RtcpMode for description.
110 newapi::RtcpMode rtcp_mode;
112 // Extended RTCP settings.
114 RtcpXr() : receiver_reference_time_report(false) {}
116 // True if RTCP Receiver Reference Time Report Block extension
117 // (RFC 3611) should be enabled.
118 bool receiver_reference_time_report;
121 // See draft-alvestrand-rmcat-remb for information.
124 // See NackConfig for description.
127 // See FecConfig for description.
130 // RTX settings for incoming video payloads that may be received. RTX is
131 // disabled if there's no config present.
133 Rtx() : ssrc(0), payload_type(0) {}
135 // SSRCs to use for the RTX streams.
138 // Payload type to use for the RTX stream.
142 // Map from video RTP payload type -> RTX config.
143 typedef std::map<int, Rtx> RtxMap;
146 // RTP header extensions used for the received stream.
147 std::vector<RtpExtension> extensions;
150 // VideoRenderer will be called for each decoded frame. 'NULL' disables
151 // rendering of this stream.
152 VideoRenderer* renderer;
154 // Expected delay needed by the renderer, i.e. the frame will be delivered
155 // this many milliseconds, if possible, earlier than the ideal render time.
156 // Only valid if 'renderer' is set.
159 // Audio channel corresponding to this video stream, used for audio/video
160 // synchronization. 'audio_channel_id' is ignored if no VoiceEngine is set
161 // when creating the VideoEngine instance. '-1' disables a/v sync.
162 int audio_channel_id;
164 // Called for each incoming video frame, i.e. in encoded state. E.g. used
166 // saving the stream to a file. 'NULL' disables the callback.
167 EncodedFrameObserver* pre_decode_callback;
169 // Called for each decoded frame. E.g. used when adding effects to the
171 // stream. 'NULL' disables the callback.
172 I420FrameCallback* pre_render_callback;
174 // Target delay in milliseconds. A positive value indicates this stream is
175 // used for streaming instead of a real-time call.
179 virtual void Start() = 0;
180 virtual void Stop() = 0;
182 // TODO(pbos): Add info on currently-received codec to Stats.
183 virtual Stats GetStats() const = 0;
186 virtual ~VideoReceiveStream() {}
189 } // namespace webrtc
191 #endif // WEBRTC_VIDEO_RECEIVE_STREAM_H_