1 /*
2 * Copyright 2015 The WebRTC project authors. All Rights Reserved.
3 *
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.
9 */
10
11 #include "pc/rtp_receiver.h"
12
13 #include <stddef.h>
14
15 #include <utility>
16 #include <vector>
17
18 #include "api/media_stream_proxy.h"
19 #include "api/media_stream_track_proxy.h"
20 #include "pc/media_stream.h"
21 #include "rtc_base/checks.h"
22 #include "rtc_base/location.h"
23 #include "rtc_base/logging.h"
24 #include "rtc_base/trace_event.h"
25
26 namespace webrtc {
27
28 // This function is only expected to be called on the signalling thread.
GenerateUniqueId()29 int RtpReceiverInternal::GenerateUniqueId() {
30 static int g_unique_id = 0;
31
32 return ++g_unique_id;
33 }
34
35 std::vector<rtc::scoped_refptr<MediaStreamInterface>>
CreateStreamsFromIds(std::vector<std::string> stream_ids)36 RtpReceiverInternal::CreateStreamsFromIds(std::vector<std::string> stream_ids) {
37 std::vector<rtc::scoped_refptr<MediaStreamInterface>> streams(
38 stream_ids.size());
39 for (size_t i = 0; i < stream_ids.size(); ++i) {
40 streams[i] = MediaStreamProxy::Create(
41 rtc::Thread::Current(), MediaStream::Create(std::move(stream_ids[i])));
42 }
43 return streams;
44 }
45
46 // Attempt to attach the frame decryptor to the current media channel on the
47 // correct worker thread only if both the media channel exists and a ssrc has
48 // been allocated to the stream.
MaybeAttachFrameDecryptorToMediaChannel(const absl::optional<uint32_t> & ssrc,rtc::Thread * worker_thread,rtc::scoped_refptr<webrtc::FrameDecryptorInterface> frame_decryptor,cricket::MediaChannel * media_channel,bool stopped)49 void RtpReceiverInternal::MaybeAttachFrameDecryptorToMediaChannel(
50 const absl::optional<uint32_t>& ssrc,
51 rtc::Thread* worker_thread,
52 rtc::scoped_refptr<webrtc::FrameDecryptorInterface> frame_decryptor,
53 cricket::MediaChannel* media_channel,
54 bool stopped) {
55 if (media_channel && frame_decryptor && ssrc.has_value() && !stopped) {
56 worker_thread->Invoke<void>(RTC_FROM_HERE, [&] {
57 media_channel->SetFrameDecryptor(*ssrc, frame_decryptor);
58 });
59 }
60 }
61
62 } // namespace webrtc
63