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| 1 // Copyright 2014 The Chromium Authors. All rights reserved. | 1 // Copyright 2014 The Chromium Authors. All rights reserved. |
| 2 // Use of this source code is governed by a BSD-style license that can be | 2 // Use of this source code is governed by a BSD-style license that can be |
| 3 // found in the LICENSE file. | 3 // found in the LICENSE file. |
| 4 | 4 |
| 5 #include "media/cast/net/rtp/packet_storage.h" | 5 #include "media/cast/net/rtp/packet_storage.h" |
| 6 | 6 |
| 7 #include "base/logging.h" | 7 #include "base/logging.h" |
| 8 #include "media/cast/constants.h" | 8 #include "media/cast/constants.h" |
| 9 | 9 |
| 10 namespace media { | 10 namespace media { |
| 11 namespace cast { | 11 namespace cast { |
| 12 | 12 |
| 13 PacketStorage::PacketStorage() | 13 PacketStorage::PacketStorage() |
| 14 : first_frame_id_in_list_(0), | 14 : first_frame_id_in_list_(0), |
| 15 zombie_count_(0) { | 15 zombie_count_(0) { |
| 16 } | 16 } |
| 17 | 17 |
| 18 PacketStorage::~PacketStorage() { | 18 PacketStorage::~PacketStorage() { |
| 19 } | 19 } |
| 20 | 20 |
| 21 size_t PacketStorage::GetNumberOfStoredFrames() const { | 21 size_t PacketStorage::GetNumberOfStoredFrames() const { |
| 22 return frames_.size() - zombie_count_; | 22 return frames_.size() - zombie_count_; |
| 23 } | 23 } |
| 24 | 24 |
| 25 void PacketStorage::StoreFrame(uint32 frame_id, | 25 void PacketStorage::StoreFrame(uint32_t frame_id, |
| 26 const SendPacketVector& packets) { | 26 const SendPacketVector& packets) { |
| 27 if (packets.empty()) { | 27 if (packets.empty()) { |
| 28 NOTREACHED(); | 28 NOTREACHED(); |
| 29 return; | 29 return; |
| 30 } | 30 } |
| 31 | 31 |
| 32 if (frames_.empty()) { | 32 if (frames_.empty()) { |
| 33 first_frame_id_in_list_ = frame_id; | 33 first_frame_id_in_list_ = frame_id; |
| 34 } else { | 34 } else { |
| 35 // Make sure frame IDs are consecutive. | 35 // Make sure frame IDs are consecutive. |
| 36 DCHECK_EQ(first_frame_id_in_list_ + static_cast<uint32>(frames_.size()), | 36 DCHECK_EQ(first_frame_id_in_list_ + static_cast<uint32_t>(frames_.size()), |
| 37 frame_id); | 37 frame_id); |
| 38 // Make sure we aren't being asked to store more frames than the system's | 38 // Make sure we aren't being asked to store more frames than the system's |
| 39 // design limit. | 39 // design limit. |
| 40 DCHECK_LT(frames_.size(), static_cast<size_t>(kMaxUnackedFrames)); | 40 DCHECK_LT(frames_.size(), static_cast<size_t>(kMaxUnackedFrames)); |
| 41 } | 41 } |
| 42 | 42 |
| 43 // Save new frame to the end of the list. | 43 // Save new frame to the end of the list. |
| 44 frames_.push_back(packets); | 44 frames_.push_back(packets); |
| 45 } | 45 } |
| 46 | 46 |
| 47 void PacketStorage::ReleaseFrame(uint32 frame_id) { | 47 void PacketStorage::ReleaseFrame(uint32_t frame_id) { |
| 48 const uint32 offset = frame_id - first_frame_id_in_list_; | 48 const uint32_t offset = frame_id - first_frame_id_in_list_; |
| 49 if (static_cast<int32>(offset) < 0 || offset >= frames_.size() || | 49 if (static_cast<int32_t>(offset) < 0 || offset >= frames_.size() || |
| 50 frames_[offset].empty()) { | 50 frames_[offset].empty()) { |
| 51 return; | 51 return; |
| 52 } | 52 } |
| 53 | 53 |
| 54 frames_[offset].clear(); | 54 frames_[offset].clear(); |
| 55 ++zombie_count_; | 55 ++zombie_count_; |
| 56 | 56 |
| 57 while (!frames_.empty() && frames_.front().empty()) { | 57 while (!frames_.empty() && frames_.front().empty()) { |
| 58 DCHECK_GT(zombie_count_, 0u); | 58 DCHECK_GT(zombie_count_, 0u); |
| 59 --zombie_count_; | 59 --zombie_count_; |
| 60 frames_.pop_front(); | 60 frames_.pop_front(); |
| 61 ++first_frame_id_in_list_; | 61 ++first_frame_id_in_list_; |
| 62 } | 62 } |
| 63 } | 63 } |
| 64 | 64 |
| 65 const SendPacketVector* PacketStorage::GetFrame8(uint8 frame_id_8bits) const { | 65 const SendPacketVector* PacketStorage::GetFrame8(uint8_t frame_id_8bits) const { |
| 66 // The requested frame ID has only 8-bits so convert the first frame ID | 66 // The requested frame ID has only 8-bits so convert the first frame ID |
| 67 // in list to match. | 67 // in list to match. |
| 68 uint8 index_8bits = first_frame_id_in_list_ & 0xFF; | 68 uint8_t index_8bits = first_frame_id_in_list_ & 0xFF; |
| 69 index_8bits = frame_id_8bits - index_8bits; | 69 index_8bits = frame_id_8bits - index_8bits; |
| 70 if (index_8bits >= frames_.size()) | 70 if (index_8bits >= frames_.size()) |
| 71 return NULL; | 71 return NULL; |
| 72 const SendPacketVector& packets = frames_[index_8bits]; | 72 const SendPacketVector& packets = frames_[index_8bits]; |
| 73 return packets.empty() ? NULL : &packets; | 73 return packets.empty() ? NULL : &packets; |
| 74 } | 74 } |
| 75 | 75 |
| 76 } // namespace cast | 76 } // namespace cast |
| 77 } // namespace media | 77 } // namespace media |
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