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Side by Side Diff: media/cast/sender/congestion_control.cc

Issue 388663003: Cast: Reshuffle files under media/cast (Closed) Base URL: svn://svn.chromium.org/chrome/trunk/src
Patch Set: missing includes Created 6 years, 5 months ago
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1 // Copyright 2013 The Chromium Authors. All rights reserved. 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 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 // The purpose of this file is determine what bitrate to use for mirroring. 5 // The purpose of this file is determine what bitrate to use for mirroring.
6 // Ideally this should be as much as possible, without causing any frames to 6 // Ideally this should be as much as possible, without causing any frames to
7 // arrive late. 7 // arrive late.
8 8
9 // The current algorithm is to measure how much bandwidth we've been using 9 // The current algorithm is to measure how much bandwidth we've been using
10 // recently. We also keep track of how much data has been queued up for sending 10 // recently. We also keep track of how much data has been queued up for sending
11 // in a virtual "buffer" (this virtual buffer represents all the buffers between 11 // in a virtual "buffer" (this virtual buffer represents all the buffers between
12 // the sender and the receiver, including retransmissions and so forth.) 12 // the sender and the receiver, including retransmissions and so forth.)
13 // If we estimate that our virtual buffer is mostly empty, we try to use 13 // If we estimate that our virtual buffer is mostly empty, we try to use
14 // more bandwidth than our recent usage, otherwise we use less. 14 // more bandwidth than our recent usage, otherwise we use less.
15 15
16 #include "media/cast/congestion_control/congestion_control.h" 16 #include "media/cast/sender/congestion_control.h"
17 17
18 #include "base/logging.h" 18 #include "base/logging.h"
19 #include "media/cast/cast_config.h" 19 #include "media/cast/cast_config.h"
20 #include "media/cast/cast_defines.h" 20 #include "media/cast/cast_defines.h"
21 21
22 namespace media { 22 namespace media {
23 namespace cast { 23 namespace cast {
24 24
25 // This means that we *try* to keep our buffer 90% empty. 25 // This means that we *try* to keep our buffer 90% empty.
26 // If it is less full, we increase the bandwidth, if it is more 26 // If it is less full, we increase the bandwidth, if it is more
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188 VLOG(3) << " FBR:" << (bits_per_second / 1E6) 188 VLOG(3) << " FBR:" << (bits_per_second / 1E6)
189 << " EBF:" << empty_buffer_fraction 189 << " EBF:" << empty_buffer_fraction
190 << " SBR:" << (safe_bitrate / 1E6); 190 << " SBR:" << (safe_bitrate / 1E6);
191 bits_per_second = std::max(bits_per_second, min_bitrate_configured_); 191 bits_per_second = std::max(bits_per_second, min_bitrate_configured_);
192 bits_per_second = std::min(bits_per_second, max_bitrate_configured_); 192 bits_per_second = std::min(bits_per_second, max_bitrate_configured_);
193 return bits_per_second; 193 return bits_per_second;
194 } 194 }
195 195
196 } // namespace cast 196 } // namespace cast
197 } // namespace media 197 } // namespace media
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