1 // Copyright 2013 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.
5 #include "media/cast/framer/framer.h"
7 #include "base/logging.h"
12 typedef FrameList::const_iterator ConstFrameIterator;
14 Framer::Framer(base::TickClock* clock,
15 RtpPayloadFeedback* incoming_payload_feedback,
17 bool decoder_faster_than_max_frame_rate,
18 int max_unacked_frames)
19 : decoder_faster_than_max_frame_rate_(decoder_faster_than_max_frame_rate),
20 cast_msg_builder_(new CastMessageBuilder(clock, incoming_payload_feedback,
21 &frame_id_map_, ssrc, decoder_faster_than_max_frame_rate,
22 max_unacked_frames)) {
23 DCHECK(incoming_payload_feedback) << "Invalid argument";
28 bool Framer::InsertPacket(const uint8* payload_data,
30 const RtpCastHeader& rtp_header,
33 PacketType packet_type = frame_id_map_.InsertPacket(rtp_header);
34 if (packet_type == kTooOldPacket) {
37 if (packet_type == kDuplicatePacket) {
38 VLOG(3) << "Packet already received, ignored: frame "
39 << static_cast<int>(rtp_header.frame_id) << ", packet "
40 << rtp_header.packet_id;
45 // Does this packet belong to a new frame?
46 FrameList::iterator it = frames_.find(rtp_header.frame_id);
47 if (it == frames_.end()) {
49 linked_ptr<FrameBuffer> frame_buffer(new FrameBuffer());
50 frame_buffer->InsertPacket(payload_data, payload_size, rtp_header);
51 frames_.insert(std::make_pair(rtp_header.frame_id, frame_buffer));
53 // Insert packet to existing frame buffer.
54 it->second->InsertPacket(payload_data, payload_size, rtp_header);
57 bool complete = (packet_type == kNewPacketCompletingFrame);
59 // ACK as soon as possible.
60 VLOG(1) << "Complete frame " << static_cast<int>(rtp_header.frame_id);
61 cast_msg_builder_->CompleteFrameReceived(rtp_header.frame_id,
62 rtp_header.is_key_frame);
67 // This does not release the frame.
68 bool Framer::GetEncodedAudioFrame(transport::EncodedAudioFrame* audio_frame,
69 uint32* rtp_timestamp,
73 if (frame_id_map_.NextContinuousFrame(&frame_id)) {
74 // We have our next frame.
77 if (!frame_id_map_.NextAudioFrameAllowingMissingFrames(&frame_id)) {
83 ConstFrameIterator it = frames_.find(frame_id);
84 DCHECK(it != frames_.end());
85 if (it == frames_.end()) return false;
87 return it->second->GetEncodedAudioFrame(audio_frame, rtp_timestamp);
90 // This does not release the frame.
91 bool Framer::GetEncodedVideoFrame(transport::EncodedVideoFrame* video_frame,
92 uint32* rtp_timestamp,
96 if (frame_id_map_.NextContinuousFrame(&frame_id)) {
97 // We have our next frame.
100 // Check if we can skip frames when our decoder is too slow.
101 if (!decoder_faster_than_max_frame_rate_) return false;
103 if (!frame_id_map_.NextVideoFrameAllowingSkippingFrames(&frame_id)) {
109 ConstFrameIterator it = frames_.find(frame_id);
110 DCHECK(it != frames_.end());
111 if (it == frames_.end()) return false;
113 return it->second->GetEncodedVideoFrame(video_frame, rtp_timestamp);
116 void Framer::Reset() {
117 frame_id_map_.Clear();
119 cast_msg_builder_->Reset();
122 void Framer::ReleaseFrame(uint32 frame_id) {
123 frame_id_map_.RemoveOldFrames(frame_id);
124 frames_.erase(frame_id);
126 // We have a frame - remove all frames with lower frame id.
127 bool skipped_old_frame = false;
128 FrameList::iterator it;
129 for (it = frames_.begin(); it != frames_.end(); ) {
130 if (IsOlderFrameId(it->first, frame_id)) {
132 skipped_old_frame = true;
137 if (skipped_old_frame) {
138 cast_msg_builder_->UpdateCastMessage();
142 bool Framer::TimeToSendNextCastMessage(base::TimeTicks* time_to_send) {
143 return cast_msg_builder_->TimeToSendNextCastMessage(time_to_send);
146 void Framer::SendCastMessage() {
147 cast_msg_builder_->UpdateCastMessage();