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| 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. | |
| 4 | |
| 5 #include "media/cast/framer/framer.h" | |
| 6 | |
| 7 #include "base/logging.h" | |
| 8 | |
| 9 namespace media { | |
| 10 namespace cast { | |
| 11 | |
| 12 typedef FrameList::const_iterator ConstFrameIterator; | |
| 13 | |
| 14 Framer::Framer(base::TickClock* clock, | |
| 15 RtpPayloadFeedback* incoming_payload_feedback, | |
| 16 uint32 ssrc, | |
| 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_( | |
| 21 new CastMessageBuilder(clock, | |
| 22 incoming_payload_feedback, | |
| 23 &frame_id_map_, | |
| 24 ssrc, | |
| 25 decoder_faster_than_max_frame_rate, | |
| 26 max_unacked_frames)) { | |
| 27 DCHECK(incoming_payload_feedback) << "Invalid argument"; | |
| 28 } | |
| 29 | |
| 30 Framer::~Framer() {} | |
| 31 | |
| 32 bool Framer::InsertPacket(const uint8* payload_data, | |
| 33 size_t payload_size, | |
| 34 const RtpCastHeader& rtp_header, | |
| 35 bool* duplicate) { | |
| 36 *duplicate = false; | |
| 37 PacketType packet_type = frame_id_map_.InsertPacket(rtp_header); | |
| 38 if (packet_type == kTooOldPacket) { | |
| 39 return false; | |
| 40 } | |
| 41 if (packet_type == kDuplicatePacket) { | |
| 42 VLOG(3) << "Packet already received, ignored: frame " | |
| 43 << static_cast<int>(rtp_header.frame_id) << ", packet " | |
| 44 << rtp_header.packet_id; | |
| 45 *duplicate = true; | |
| 46 return false; | |
| 47 } | |
| 48 | |
| 49 // Does this packet belong to a new frame? | |
| 50 FrameList::iterator it = frames_.find(rtp_header.frame_id); | |
| 51 if (it == frames_.end()) { | |
| 52 // New frame. | |
| 53 linked_ptr<FrameBuffer> frame_buffer(new FrameBuffer()); | |
| 54 frame_buffer->InsertPacket(payload_data, payload_size, rtp_header); | |
| 55 frames_.insert(std::make_pair(rtp_header.frame_id, frame_buffer)); | |
| 56 } else { | |
| 57 // Insert packet to existing frame buffer. | |
| 58 it->second->InsertPacket(payload_data, payload_size, rtp_header); | |
| 59 } | |
| 60 | |
| 61 return packet_type == kNewPacketCompletingFrame; | |
| 62 } | |
| 63 | |
| 64 // This does not release the frame. | |
| 65 bool Framer::GetEncodedFrame(transport::EncodedFrame* frame, | |
| 66 bool* next_frame, | |
| 67 bool* have_multiple_decodable_frames) { | |
| 68 *have_multiple_decodable_frames = frame_id_map_.HaveMultipleDecodableFrames(); | |
| 69 | |
| 70 uint32 frame_id; | |
| 71 // Find frame id. | |
| 72 if (frame_id_map_.NextContinuousFrame(&frame_id)) { | |
| 73 // We have our next frame. | |
| 74 *next_frame = true; | |
| 75 } else { | |
| 76 // Check if we can skip frames when our decoder is too slow. | |
| 77 if (!decoder_faster_than_max_frame_rate_) | |
| 78 return false; | |
| 79 | |
| 80 if (!frame_id_map_.NextFrameAllowingSkippingFrames(&frame_id)) { | |
| 81 return false; | |
| 82 } | |
| 83 *next_frame = false; | |
| 84 } | |
| 85 | |
| 86 if (*next_frame) { | |
| 87 VLOG(2) << "ACK frame " << frame_id; | |
| 88 cast_msg_builder_->CompleteFrameReceived(frame_id); | |
| 89 } | |
| 90 | |
| 91 ConstFrameIterator it = frames_.find(frame_id); | |
| 92 DCHECK(it != frames_.end()); | |
| 93 if (it == frames_.end()) | |
| 94 return false; | |
| 95 | |
| 96 return it->second->AssembleEncodedFrame(frame); | |
| 97 } | |
| 98 | |
| 99 void Framer::Reset() { | |
| 100 frame_id_map_.Clear(); | |
| 101 frames_.clear(); | |
| 102 cast_msg_builder_->Reset(); | |
| 103 } | |
| 104 | |
| 105 void Framer::ReleaseFrame(uint32 frame_id) { | |
| 106 frame_id_map_.RemoveOldFrames(frame_id); | |
| 107 frames_.erase(frame_id); | |
| 108 | |
| 109 // We have a frame - remove all frames with lower frame id. | |
| 110 bool skipped_old_frame = false; | |
| 111 FrameList::iterator it; | |
| 112 for (it = frames_.begin(); it != frames_.end();) { | |
| 113 if (IsOlderFrameId(it->first, frame_id)) { | |
| 114 frames_.erase(it++); | |
| 115 skipped_old_frame = true; | |
| 116 } else { | |
| 117 ++it; | |
| 118 } | |
| 119 } | |
| 120 if (skipped_old_frame) { | |
| 121 cast_msg_builder_->UpdateCastMessage(); | |
| 122 } | |
| 123 } | |
| 124 | |
| 125 bool Framer::TimeToSendNextCastMessage(base::TimeTicks* time_to_send) { | |
| 126 return cast_msg_builder_->TimeToSendNextCastMessage(time_to_send); | |
| 127 } | |
| 128 | |
| 129 void Framer::SendCastMessage() { cast_msg_builder_->UpdateCastMessage(); } | |
| 130 | |
| 131 } // namespace cast | |
| 132 } // namespace media | |
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Chromium Code Reviews
Issue 388663003:
Cast: Reshuffle files under media/cast (Closed)
Base URL: svn://svn.chromium.org/chrome/trunk/src