OLD | NEW |
1 /* | 1 /* |
2 * Copyright (c) 2012 The WebRTC project authors. All Rights Reserved. | 2 * Copyright (c) 2012 The WebRTC project authors. All Rights Reserved. |
3 * | 3 * |
4 * Use of this source code is governed by a BSD-style license | 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 | 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 | 6 * tree. An additional intellectual property rights grant can be found |
7 * in the file PATENTS. All contributing project authors may | 7 * in the file PATENTS. All contributing project authors may |
8 * be found in the AUTHORS file in the root of the source tree. | 8 * be found in the AUTHORS file in the root of the source tree. |
9 */ | 9 */ |
10 | 10 |
(...skipping 19 matching lines...) Expand all Loading... |
30 min_parent_size_(std::numeric_limits<int>::max()), | 30 min_parent_size_(std::numeric_limits<int>::max()), |
31 packet_start_(false) { | 31 packet_start_(false) { |
32 // If |this_size_| > INT_MAX, Cost() and CreateChildren() won't work properly. | 32 // If |this_size_| > INT_MAX, Cost() and CreateChildren() won't work properly. |
33 assert(this_size_ <= static_cast<size_t>(std::numeric_limits<int>::max())); | 33 assert(this_size_ <= static_cast<size_t>(std::numeric_limits<int>::max())); |
34 children_[kLeftChild] = NULL; | 34 children_[kLeftChild] = NULL; |
35 children_[kRightChild] = NULL; | 35 children_[kRightChild] = NULL; |
36 } | 36 } |
37 | 37 |
38 PartitionTreeNode* PartitionTreeNode::CreateRootNode(const size_t* size_vector, | 38 PartitionTreeNode* PartitionTreeNode::CreateRootNode(const size_t* size_vector, |
39 size_t num_partitions) { | 39 size_t num_partitions) { |
40 PartitionTreeNode* root_node = | 40 PartitionTreeNode* root_node = new PartitionTreeNode( |
41 new PartitionTreeNode(NULL, &size_vector[1], num_partitions - 1, | 41 NULL, &size_vector[1], num_partitions - 1, size_vector[0]); |
42 size_vector[0]); | |
43 root_node->set_packet_start(true); | 42 root_node->set_packet_start(true); |
44 return root_node; | 43 return root_node; |
45 } | 44 } |
46 | 45 |
47 PartitionTreeNode::~PartitionTreeNode() { | 46 PartitionTreeNode::~PartitionTreeNode() { |
48 delete children_[kLeftChild]; | 47 delete children_[kLeftChild]; |
49 delete children_[kRightChild]; | 48 delete children_[kRightChild]; |
50 } | 49 } |
51 | 50 |
52 int PartitionTreeNode::Cost(size_t penalty) { | 51 int PartitionTreeNode::Cost(size_t penalty) { |
53 int cost = 0; | 52 int cost = 0; |
54 if (num_partitions_ == 0) { | 53 if (num_partitions_ == 0) { |
55 // This is a solution node. | 54 // This is a solution node. |
56 cost = std::max(max_parent_size_, this_size_int()) - | 55 cost = std::max(max_parent_size_, this_size_int()) - |
57 std::min(min_parent_size_, this_size_int()); | 56 std::min(min_parent_size_, this_size_int()); |
58 } else { | 57 } else { |
59 cost = std::max(max_parent_size_, this_size_int()) - min_parent_size_; | 58 cost = std::max(max_parent_size_, this_size_int()) - min_parent_size_; |
60 } | 59 } |
61 return cost + NumPackets() * penalty; | 60 return cost + NumPackets() * penalty; |
62 } | 61 } |
63 | 62 |
64 bool PartitionTreeNode::CreateChildren(size_t max_size) { | 63 bool PartitionTreeNode::CreateChildren(size_t max_size) { |
65 assert(max_size > 0); | 64 assert(max_size > 0); |
66 bool children_created = false; | 65 bool children_created = false; |
67 if (num_partitions_ > 0) { | 66 if (num_partitions_ > 0) { |
68 if (this_size_ + size_vector_[0] <= max_size) { | 67 if (this_size_ + size_vector_[0] <= max_size) { |
69 assert(!children_[kLeftChild]); | 68 assert(!children_[kLeftChild]); |
70 children_[kLeftChild] = | 69 children_[kLeftChild] = |
71 new PartitionTreeNode(this, | 70 new PartitionTreeNode(this, &size_vector_[1], num_partitions_ - 1, |
72 &size_vector_[1], | |
73 num_partitions_ - 1, | |
74 this_size_ + size_vector_[0]); | 71 this_size_ + size_vector_[0]); |
75 children_[kLeftChild]->set_max_parent_size(max_parent_size_); | 72 children_[kLeftChild]->set_max_parent_size(max_parent_size_); |
76 children_[kLeftChild]->set_min_parent_size(min_parent_size_); | 73 children_[kLeftChild]->set_min_parent_size(min_parent_size_); |
77 // "Left" child is continuation of same packet. | 74 // "Left" child is continuation of same packet. |
78 children_[kLeftChild]->set_packet_start(false); | 75 children_[kLeftChild]->set_packet_start(false); |
79 children_created = true; | 76 children_created = true; |
80 } | 77 } |
81 if (this_size_ > 0) { | 78 if (this_size_ > 0) { |
82 assert(!children_[kRightChild]); | 79 assert(!children_[kRightChild]); |
83 children_[kRightChild] = new PartitionTreeNode(this, | 80 children_[kRightChild] = new PartitionTreeNode( |
84 &size_vector_[1], | 81 this, &size_vector_[1], num_partitions_ - 1, size_vector_[0]); |
85 num_partitions_ - 1, | |
86 size_vector_[0]); | |
87 children_[kRightChild]->set_max_parent_size( | 82 children_[kRightChild]->set_max_parent_size( |
88 std::max(max_parent_size_, this_size_int())); | 83 std::max(max_parent_size_, this_size_int())); |
89 children_[kRightChild]->set_min_parent_size( | 84 children_[kRightChild]->set_min_parent_size( |
90 std::min(min_parent_size_, this_size_int())); | 85 std::min(min_parent_size_, this_size_int())); |
91 // "Right" child starts a new packet. | 86 // "Right" child starts a new packet. |
92 children_[kRightChild]->set_packet_start(true); | 87 children_[kRightChild]->set_packet_start(true); |
93 children_created = true; | 88 children_created = true; |
94 } | 89 } |
95 } | 90 } |
96 return children_created; | 91 return children_created; |
(...skipping 44 matching lines...) Expand 10 before | Expand all | Expand 10 after Loading... |
141 if (second->Cost(penalty) < first->Cost(penalty)) { | 136 if (second->Cost(penalty) < first->Cost(penalty)) { |
142 return second; | 137 return second; |
143 } | 138 } |
144 } | 139 } |
145 return first; | 140 return first; |
146 } | 141 } |
147 } | 142 } |
148 | 143 |
149 Vp8PartitionAggregator::Vp8PartitionAggregator( | 144 Vp8PartitionAggregator::Vp8PartitionAggregator( |
150 const RTPFragmentationHeader& fragmentation, | 145 const RTPFragmentationHeader& fragmentation, |
151 size_t first_partition_idx, size_t last_partition_idx) | 146 size_t first_partition_idx, |
| 147 size_t last_partition_idx) |
152 : root_(NULL), | 148 : root_(NULL), |
153 num_partitions_(last_partition_idx - first_partition_idx + 1), | 149 num_partitions_(last_partition_idx - first_partition_idx + 1), |
154 size_vector_(new size_t[num_partitions_]), | 150 size_vector_(new size_t[num_partitions_]), |
155 largest_partition_size_(0) { | 151 largest_partition_size_(0) { |
156 assert(last_partition_idx >= first_partition_idx); | 152 assert(last_partition_idx >= first_partition_idx); |
157 assert(last_partition_idx < fragmentation.fragmentationVectorSize); | 153 assert(last_partition_idx < fragmentation.fragmentationVectorSize); |
158 for (size_t i = 0; i < num_partitions_; ++i) { | 154 for (size_t i = 0; i < num_partitions_; ++i) { |
159 size_vector_[i] = | 155 size_vector_[i] = |
160 fragmentation.fragmentationLength[i + first_partition_idx]; | 156 fragmentation.fragmentationLength[i + first_partition_idx]; |
161 largest_partition_size_ = std::max(largest_partition_size_, | 157 largest_partition_size_ = |
162 size_vector_[i]); | 158 std::max(largest_partition_size_, size_vector_[i]); |
163 } | 159 } |
164 root_ = PartitionTreeNode::CreateRootNode(size_vector_, num_partitions_); | 160 root_ = PartitionTreeNode::CreateRootNode(size_vector_, num_partitions_); |
165 } | 161 } |
166 | 162 |
167 Vp8PartitionAggregator::~Vp8PartitionAggregator() { | 163 Vp8PartitionAggregator::~Vp8PartitionAggregator() { |
168 delete [] size_vector_; | 164 delete[] size_vector_; |
169 delete root_; | 165 delete root_; |
170 } | 166 } |
171 | 167 |
172 void Vp8PartitionAggregator::SetPriorMinMax(int min_size, int max_size) { | 168 void Vp8PartitionAggregator::SetPriorMinMax(int min_size, int max_size) { |
173 assert(root_); | 169 assert(root_); |
174 assert(min_size >= 0); | 170 assert(min_size >= 0); |
175 assert(max_size >= min_size); | 171 assert(max_size >= min_size); |
176 root_->set_min_parent_size(min_size); | 172 root_->set_min_parent_size(min_size); |
177 root_->set_max_parent_size(max_size); | 173 root_->set_max_parent_size(max_size); |
178 } | 174 } |
179 | 175 |
180 Vp8PartitionAggregator::ConfigVec | 176 Vp8PartitionAggregator::ConfigVec |
181 Vp8PartitionAggregator::FindOptimalConfiguration(size_t max_size, | 177 Vp8PartitionAggregator::FindOptimalConfiguration(size_t max_size, |
182 size_t penalty) { | 178 size_t penalty) { |
183 assert(root_); | 179 assert(root_); |
184 assert(max_size >= largest_partition_size_); | 180 assert(max_size >= largest_partition_size_); |
185 PartitionTreeNode* opt = root_->GetOptimalNode(max_size, penalty); | 181 PartitionTreeNode* opt = root_->GetOptimalNode(max_size, penalty); |
186 ConfigVec config_vector(num_partitions_, 0); | 182 ConfigVec config_vector(num_partitions_, 0); |
187 PartitionTreeNode* temp_node = opt; | 183 PartitionTreeNode* temp_node = opt; |
188 size_t packet_index = opt->NumPackets(); | 184 size_t packet_index = opt->NumPackets(); |
189 for (size_t i = num_partitions_; i > 0; --i) { | 185 for (size_t i = num_partitions_; i > 0; --i) { |
190 assert(packet_index > 0); | 186 assert(packet_index > 0); |
191 assert(temp_node != NULL); | 187 assert(temp_node != NULL); |
192 config_vector[i - 1] = packet_index - 1; | 188 config_vector[i - 1] = packet_index - 1; |
193 if (temp_node->packet_start()) --packet_index; | 189 if (temp_node->packet_start()) |
| 190 --packet_index; |
194 temp_node = temp_node->parent(); | 191 temp_node = temp_node->parent(); |
195 } | 192 } |
196 return config_vector; | 193 return config_vector; |
197 } | 194 } |
198 | 195 |
199 void Vp8PartitionAggregator::CalcMinMax(const ConfigVec& config, | 196 void Vp8PartitionAggregator::CalcMinMax(const ConfigVec& config, |
200 int* min_size, int* max_size) const { | 197 int* min_size, |
| 198 int* max_size) const { |
201 if (*min_size < 0) { | 199 if (*min_size < 0) { |
202 *min_size = std::numeric_limits<int>::max(); | 200 *min_size = std::numeric_limits<int>::max(); |
203 } | 201 } |
204 if (*max_size < 0) { | 202 if (*max_size < 0) { |
205 *max_size = 0; | 203 *max_size = 0; |
206 } | 204 } |
207 size_t i = 0; | 205 size_t i = 0; |
208 while (i < config.size()) { | 206 while (i < config.size()) { |
209 size_t this_size = 0; | 207 size_t this_size = 0; |
210 size_t j = i; | 208 size_t j = i; |
(...skipping 45 matching lines...) Expand 10 before | Expand all | Expand 10 after Loading... |
256 } else { | 254 } else { |
257 cost = n * penalty; | 255 cost = n * penalty; |
258 } | 256 } |
259 if (fragment_size <= max_payload_size && cost < best_cost) { | 257 if (fragment_size <= max_payload_size && cost < best_cost) { |
260 num_fragments = n; | 258 num_fragments = n; |
261 best_cost = cost; | 259 best_cost = cost; |
262 } | 260 } |
263 } | 261 } |
264 assert(num_fragments > 0); | 262 assert(num_fragments > 0); |
265 // TODO(mflodman) Assert disabled since it's falsely triggered, see issue 293. | 263 // TODO(mflodman) Assert disabled since it's falsely triggered, see issue 293. |
266 //assert(large_partition_size / num_fragments + 1 <= max_payload_size); | 264 // assert(large_partition_size / num_fragments + 1 <= max_payload_size); |
267 return num_fragments; | 265 return num_fragments; |
268 } | 266 } |
269 | 267 |
270 } // namespace | 268 } // namespace |
OLD | NEW |