1 files changed, 122 insertions, 0 deletions
diff --git a/chromium/media/cast/cast_defines.h b/chromium/media/cast/cast_defines.h
new file mode 100644
index 00000000000..13717323405
--- /dev/null
+++ b/chromium/media/cast/cast_defines.h
@@ -0,0 +1,122 @@
+// Copyright 2013 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#ifndef MEDIA_CAST_CAST_DEFINES_H_
+#define MEDIA_CAST_CAST_DEFINES_H_
+
+#include <map>
+#include <set>
+
+#include "base/basictypes.h"
+#include "base/compiler_specific.h"
+#include "base/time/time.h"
+
+namespace media {
+namespace cast {
+
+const int64 kDontShowTimeoutMs = 33;
+const float kDefaultCongestionControlBackOff = 0.875f;
+const uint8 kStartFrameId = 255;
+const uint32 kVideoFrequency = 90000;
+const int64 kSkippedFramesCheckPeriodkMs = 10000;
+
+// Number of skipped frames threshold in fps (as configured) per period above.
+const int kSkippedFramesThreshold = 3;
+const size_t kIpPacketSize = 1500;
+const int kStartRttMs = 20;
+const int64 kCastMessageUpdateIntervalMs = 33;
+const int64 kNackRepeatIntervalMs = 30;
+
+enum DefaultSettings {
+  kDefaultMaxQp = 56,
+  kDefaultMinQp = 4,
+  kDefaultMaxFrameRate = 30,
+  kDefaultNumberOfVideoBuffers = 1,
+  kDefaultRtcpIntervalMs = 500,
+  kDefaultRtpHistoryMs = 1000,
+  kDefaultRtpMaxDelayMs = 100,
+};
+
+const uint16 kRtcpCastAllPacketsLost = 0xffff;
+
+// Each uint16 represents one packet id within a cast frame.
+typedef std::set<uint16> PacketIdSet;
+// Each uint8 represents one cast frame.
+typedef std::map<uint8, PacketIdSet> MissingFramesAndPacketsMap;
+
+// TODO(pwestin): Re-factor the functions bellow into a class with static
+// methods.
+
+// Magic fractional unit. Used to convert time (in microseconds) to/from
+// fractional NTP seconds.
+static const double kMagicFractionalUnit = 4.294967296E3;
+
+// Network Time Protocol (NTP), which is in seconds relative to 0h UTC on
+// 1 January 1900.
+static const int64 kNtpEpochDeltaSeconds = GG_INT64_C(9435484800);
+static const int64 kNtpEpochDeltaMicroseconds =
+    kNtpEpochDeltaSeconds * base::Time::kMicrosecondsPerSecond;
+
+inline bool IsNewerFrameId(uint8 frame_id, uint8 prev_frame_id) {
+  return (frame_id != prev_frame_id) &&
+      static_cast<uint8>(frame_id - prev_frame_id) < 0x80;
+}
+
+inline bool IsOlderFrameId(uint8 frame_id, uint8 prev_frame_id) {
+  return (frame_id == prev_frame_id) || IsNewerFrameId(prev_frame_id, frame_id);
+}
+
+inline bool IsNewerPacketId(uint16 packet_id, uint16 prev_packet_id) {
+  return (packet_id != prev_packet_id) &&
+      static_cast<uint16>(packet_id - prev_packet_id) < 0x8000;
+}
+
+inline bool IsNewerSequenceNumber(uint16 sequence_number,
+                                  uint16 prev_sequence_number) {
+  // Same function as IsNewerPacketId just different data and name.
+  return IsNewerPacketId(sequence_number, prev_sequence_number);
+}
+
+// Create a NTP diff from seconds and fractions of seconds; delay_fraction is
+// fractions of a second where 0x80000000 is half a second.
+inline uint32 ConvertToNtpDiff(uint32 delay_seconds, uint32 delay_fraction) {
+  return ((delay_seconds & 0x0000FFFF) << 16) +
+         ((delay_fraction & 0xFFFF0000) >> 16);
+}
+
+inline base::TimeDelta ConvertFromNtpDiff(uint32 ntp_delay) {
+  uint32 delay_ms = (ntp_delay & 0x0000ffff) * 1000;
+  delay_ms >>= 16;
+  delay_ms += ((ntp_delay & 0xffff0000) >> 16) * 1000;
+  return base::TimeDelta::FromMilliseconds(delay_ms);
+}
+
+inline void ConvertTimeToFractions(int64 time_us,
+                                   uint32* seconds,
+                                   uint32* fractions) {
+  *seconds = static_cast<uint32>(time_us / base::Time::kMicrosecondsPerSecond);
+  *fractions = static_cast<uint32>(
+      (time_us % base::Time::kMicrosecondsPerSecond) * kMagicFractionalUnit);
+}
+
+inline void ConvertTimeToNtp(const base::TimeTicks& time,
+                             uint32* ntp_seconds,
+                             uint32* ntp_fractions) {
+  int64 time_us = time.ToInternalValue() - kNtpEpochDeltaMicroseconds;
+  ConvertTimeToFractions(time_us, ntp_seconds, ntp_fractions);
+}
+
+inline base::TimeTicks ConvertNtpToTime(uint32 ntp_seconds,
+                                        uint32 ntp_fractions) {
+  int64 ntp_time_us = static_cast<int64>(ntp_seconds) *
+       base::Time::kMicrosecondsPerSecond;
+  ntp_time_us += static_cast<int64>(ntp_fractions) / kMagicFractionalUnit;
+  return base::TimeTicks::FromInternalValue(ntp_time_us +
+      kNtpEpochDeltaMicroseconds);
+}
+
+}  // namespace cast
+}  // namespace media
+
+#endif  // MEDIA_CAST_CAST_DEFINES_H_