Remove Gonk build directories

1 files changed, 0 insertions, 519 deletions

diff --git a/widget/gonk/ProcessOrientation.cpp b/widget/gonk/ProcessOrientation.cpp
deleted file mode 100644
index bbdcface8..000000000
--- a/widget/gonk/ProcessOrientation.cpp
+++ /dev/null
@@ -1,519 +0,0 @@
-/*
- * Copyright (c) 2013, Linux Foundation. All rights reserved
- *
- * Copyright (C) 2008 The Android Open Source Project
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-#include "base/basictypes.h"
-#include "mozilla/Hal.h"
-#include "mozilla/Unused.h"
-#include "nsIScreen.h"
-#include "nsIScreenManager.h"
-#include "OrientationObserver.h"
-#include "ProcessOrientation.h"
-#include "mozilla/HalSensor.h"
-#include "math.h"
-#include "limits.h"
-#include "android/log.h"
-
-#if 0
-#define LOGD(args...)  __android_log_print(ANDROID_LOG_DEBUG, "ProcessOrientation" , ## args)
-#else
-#define LOGD(args...)
-#endif
-
-namespace mozilla {
-
-// We work with all angles in degrees in this class.
-#define RADIANS_TO_DEGREES (180/M_PI)
-
-// Number of nanoseconds per millisecond.
-#define NANOS_PER_MS 1000000
-
-// Indices into SensorEvent.values for the accelerometer sensor.
-#define ACCELEROMETER_DATA_X 0
-#define ACCELEROMETER_DATA_Y 1
-#define ACCELEROMETER_DATA_Z 2
-
-// The minimum amount of time that a predicted rotation must be stable before
-// it is accepted as a valid rotation proposal. This value can be quite small
-// because the low-pass filter already suppresses most of the noise so we're
-// really just looking for quick confirmation that the last few samples are in
-// agreement as to the desired orientation.
-#define PROPOSAL_SETTLE_TIME_NANOS (40*NANOS_PER_MS)
-
-// The minimum amount of time that must have elapsed since the device last
-// exited the flat state (time since it was picked up) before the proposed
-// rotation can change.
-#define PROPOSAL_MIN_TIME_SINCE_FLAT_ENDED_NANOS (500*NANOS_PER_MS)
-
-// The minimum amount of time that must have elapsed since the device stopped
-// swinging (time since device appeared to be in the process of being put down
-// or put away into a pocket) before the proposed rotation can change.
-#define PROPOSAL_MIN_TIME_SINCE_SWING_ENDED_NANOS (300*NANOS_PER_MS)
-
-// The minimum amount of time that must have elapsed since the device stopped
-// undergoing external acceleration before the proposed rotation can change.
-#define PROPOSAL_MIN_TIME_SINCE_ACCELERATION_ENDED_NANOS (500*NANOS_PER_MS)
-
-// If the tilt angle remains greater than the specified angle for a minimum of
-// the specified time, then the device is deemed to be lying flat
-// (just chillin' on a table).
-#define FLAT_ANGLE 75
-#define FLAT_TIME_NANOS (1000*NANOS_PER_MS)
-
-// If the tilt angle has increased by at least delta degrees within the
-// specified amount of time, then the device is deemed to be swinging away
-// from the user down towards flat (tilt = 90).
-#define SWING_AWAY_ANGLE_DELTA 20
-#define SWING_TIME_NANOS (300*NANOS_PER_MS)
-
-// The maximum sample inter-arrival time in milliseconds. If the acceleration
-// samples are further apart than this amount in time, we reset the state of
-// the low-pass filter and orientation properties.  This helps to handle
-// boundary conditions when the device is turned on, wakes from suspend or
-// there is a significant gap in samples.
-#define MAX_FILTER_DELTA_TIME_NANOS (1000*NANOS_PER_MS)
-
-// The acceleration filter time constant.
-//
-// This time constant is used to tune the acceleration filter such that
-// impulses and vibrational noise (think car dock) is suppressed before we try
-// to calculate the tilt and orientation angles.
-//
-// The filter time constant is related to the filter cutoff frequency, which
-// is the frequency at which signals are attenuated by 3dB (half the passband
-// power). Each successive octave beyond this frequency is attenuated by an
-// additional 6dB.
-//
-// Given a time constant t in seconds, the filter cutoff frequency Fc in Hertz
-// is given by Fc = 1 / (2pi * t).
-//
-// The higher the time constant, the lower the cutoff frequency, so more noise
-// will be suppressed.
-//
-// Filtering adds latency proportional the time constant (inversely
-// proportional to the cutoff frequency) so we don't want to make the time
-// constant too large or we can lose responsiveness.  Likewise we don't want
-// to make it too small or we do a poor job suppressing acceleration spikes.
-// Empirically, 100ms seems to be too small and 500ms is too large. Android
-// default is 200.
-#define FILTER_TIME_CONSTANT_MS 200.0f
-
-// State for orientation detection. Thresholds for minimum and maximum
-// allowable deviation from gravity.
-//
-// If the device is undergoing external acceleration (being bumped, in a car
-// that is turning around a corner or a plane taking off) then the magnitude
-// may be substantially more or less than gravity.  This can skew our
-// orientation detection by making us think that up is pointed in a different
-// direction.
-//
-// Conversely, if the device is in freefall, then there will be no gravity to
-// measure at all.  This is problematic because we cannot detect the orientation
-// without gravity to tell us which way is up. A magnitude near 0 produces
-// singularities in the tilt and orientation calculations.
-//
-// In both cases, we postpone choosing an orientation.
-//
-// However, we need to tolerate some acceleration because the angular momentum
-// of turning the device can skew the observed acceleration for a short period
-// of time.
-#define NEAR_ZERO_MAGNITUDE 1 // m/s^2
-#define ACCELERATION_TOLERANCE 4 // m/s^2
-#define STANDARD_GRAVITY 9.80665f
-#define MIN_ACCELERATION_MAGNITUDE (STANDARD_GRAVITY-ACCELERATION_TOLERANCE)
-#define MAX_ACCELERATION_MAGNITUDE (STANDARD_GRAVITY+ACCELERATION_TOLERANCE)
-
-// Maximum absolute tilt angle at which to consider orientation data. Beyond
-// this (i.e. when screen is facing the sky or ground), we completely ignore
-// orientation data.
-#define MAX_TILT 75
-
-// The gap angle in degrees between adjacent orientation angles for
-// hysteresis.This creates a "dead zone" between the current orientation and a
-// proposed adjacent orientation. No orientation proposal is made when the
-// orientation angle is within the gap between the current orientation and the
-// adjacent orientation.
-#define ADJACENT_ORIENTATION_ANGLE_GAP 45
-
-const int
-ProcessOrientation::tiltTolerance[][4] = {
-  {-25, 70}, // ROTATION_0
-  {-25, 65}, // ROTATION_90
-  {-25, 60}, // ROTATION_180
-  {-25, 65}  // ROTATION_270
-};
-
-int
-ProcessOrientation::GetProposedRotation()
-{
-  return mProposedRotation;
-}
-
-int
-ProcessOrientation::OnSensorChanged(const SensorData& event,
-                                    int deviceCurrentRotation)
-{
-  // The vector given in the SensorEvent points straight up (towards the sky)
-  // under ideal conditions (the phone is not accelerating). I'll call this up
-  // vector elsewhere.
-  const InfallibleTArray<float>& values = event.values();
-  float x = values[ACCELEROMETER_DATA_X];
-  float y = values[ACCELEROMETER_DATA_Y];
-  float z = values[ACCELEROMETER_DATA_Z];
-
-  LOGD
-    ("ProcessOrientation: Raw acceleration vector: x = %f, y = %f, z = %f,"
-     "magnitude = %f\n", x, y, z, sqrt(x * x + y * y + z * z));
-  // Apply a low-pass filter to the acceleration up vector in cartesian space.
-  // Reset the orientation listener state if the samples are too far apart in
-  // time or when we see values of (0, 0, 0) which indicates that we polled the
-  // accelerometer too soon after turning it on and we don't have any data yet.
-  const int64_t now = (int64_t) event.timestamp();
-  const int64_t then = mLastFilteredTimestampNanos;
-  const float timeDeltaMS = (now - then) * 0.000001f;
-  bool skipSample = false;
-  if (now < then
-      || now > then + MAX_FILTER_DELTA_TIME_NANOS
-      || (x == 0 && y == 0 && z == 0)) {
-    LOGD
-      ("ProcessOrientation: Resetting orientation listener.");
-    Reset();
-    skipSample = true;
-  } else {
-    const float alpha = timeDeltaMS / (FILTER_TIME_CONSTANT_MS + timeDeltaMS);
-    x = alpha * (x - mLastFilteredX) + mLastFilteredX;
-    y = alpha * (y - mLastFilteredY) + mLastFilteredY;
-    z = alpha * (z - mLastFilteredZ) + mLastFilteredZ;
-    LOGD
-      ("ProcessOrientation: Filtered acceleration vector: x=%f, y=%f, z=%f,"
-       "magnitude=%f", z, y, z, sqrt(x * x + y * y + z * z));
-    skipSample = false;
-  }
-  mLastFilteredTimestampNanos = now;
-  mLastFilteredX = x;
-  mLastFilteredY = y;
-  mLastFilteredZ = z;
-
-  bool isAccelerating = false;
-  bool isFlat = false;
-  bool isSwinging = false;
-  if (skipSample) {
-    return -1;
-  }
-
-  // Calculate the magnitude of the acceleration vector.
-  const float magnitude = sqrt(x * x + y * y + z * z);
-  if (magnitude < NEAR_ZERO_MAGNITUDE) {
-    LOGD
-      ("ProcessOrientation: Ignoring sensor data, magnitude too close to"
-       " zero.");
-    ClearPredictedRotation();
-  } else {
-    // Determine whether the device appears to be undergoing external
-    // acceleration.
-    if (this->IsAccelerating(magnitude)) {
-      isAccelerating = true;
-      mAccelerationTimestampNanos = now;
-    }
-    // Calculate the tilt angle. This is the angle between the up vector and
-    // the x-y plane (the plane of the screen) in a range of [-90, 90]
-    // degrees.
-    //   -90 degrees: screen horizontal and facing the ground (overhead)
-    //     0 degrees: screen vertical
-    //    90 degrees: screen horizontal and facing the sky (on table)
-    const int tiltAngle =
-      static_cast<int>(roundf(asin(z / magnitude) * RADIANS_TO_DEGREES));
-    AddTiltHistoryEntry(now, tiltAngle);
-
-    // Determine whether the device appears to be flat or swinging.
-    if (this->IsFlat(now)) {
-      isFlat = true;
-      mFlatTimestampNanos = now;
-    }
-    if (this->IsSwinging(now, tiltAngle)) {
-      isSwinging = true;
-      mSwingTimestampNanos = now;
-    }
-    // If the tilt angle is too close to horizontal then we cannot determine
-    // the orientation angle of the screen.
-    if (abs(tiltAngle) > MAX_TILT) {
-      LOGD
-        ("ProcessOrientation: Ignoring sensor data, tilt angle too high:"
-         " tiltAngle=%d", tiltAngle);
-      ClearPredictedRotation();
-    } else {
-      // Calculate the orientation angle.
-      // This is the angle between the x-y projection of the up vector onto
-      // the +y-axis, increasing clockwise in a range of [0, 360] degrees.
-      int orientationAngle =
-        static_cast<int>(roundf(-atan2f(-x, y) * RADIANS_TO_DEGREES));
-      if (orientationAngle < 0) {
-        // atan2 returns [-180, 180]; normalize to [0, 360]
-        orientationAngle += 360;
-      }
-      // Find the nearest rotation.
-      int nearestRotation = (orientationAngle + 45) / 90;
-      if (nearestRotation == 4) {
-        nearestRotation = 0;
-      }
-      // Determine the predicted orientation.
-      if (IsTiltAngleAcceptable(nearestRotation, tiltAngle)
-          &&
-          IsOrientationAngleAcceptable
-          (nearestRotation, orientationAngle, deviceCurrentRotation)) {
-        UpdatePredictedRotation(now, nearestRotation);
-        LOGD
-          ("ProcessOrientation: Predicted: tiltAngle=%d, orientationAngle=%d,"
-           " predictedRotation=%d, predictedRotationAgeMS=%f",
-           tiltAngle,
-           orientationAngle,
-           mPredictedRotation,
-           ((now - mPredictedRotationTimestampNanos) * 0.000001f));
-      } else {
-        LOGD
-          ("ProcessOrientation: Ignoring sensor data, no predicted rotation:"
-           " tiltAngle=%d, orientationAngle=%d",
-           tiltAngle,
-           orientationAngle);
-        ClearPredictedRotation();
-      }
-    }
-  }
-
-  // Determine new proposed rotation.
-  const int oldProposedRotation = mProposedRotation;
-  if (mPredictedRotation < 0 || IsPredictedRotationAcceptable(now)) {
-    mProposedRotation = mPredictedRotation;
-  }
-  // Write final statistics about where we are in the orientation detection
-  // process.
-  LOGD
-    ("ProcessOrientation: Result: oldProposedRotation=%d,currentRotation=%d, "
-     "proposedRotation=%d, predictedRotation=%d, timeDeltaMS=%f, "
-     "isAccelerating=%d, isFlat=%d, isSwinging=%d, timeUntilSettledMS=%f, "
-     "timeUntilAccelerationDelayExpiredMS=%f, timeUntilFlatDelayExpiredMS=%f, "
-     "timeUntilSwingDelayExpiredMS=%f",
-     oldProposedRotation,
-     deviceCurrentRotation, mProposedRotation,
-     mPredictedRotation, timeDeltaMS, isAccelerating, isFlat,
-     isSwinging, RemainingMS(now,
-                             mPredictedRotationTimestampNanos +
-                             PROPOSAL_SETTLE_TIME_NANOS),
-     RemainingMS(now,
-                 mAccelerationTimestampNanos +
-                 PROPOSAL_MIN_TIME_SINCE_ACCELERATION_ENDED_NANOS),
-     RemainingMS(now,
-                 mFlatTimestampNanos +
-                 PROPOSAL_MIN_TIME_SINCE_FLAT_ENDED_NANOS),
-     RemainingMS(now,
-                 mSwingTimestampNanos +
-                 PROPOSAL_MIN_TIME_SINCE_SWING_ENDED_NANOS));
-
-  // Avoid unused-but-set compile warnings for these variables, when LOGD is
-  // a no-op, as it is by default:
-  Unused << isAccelerating;
-  Unused << isFlat;
-  Unused << isSwinging;
-
-  // Tell the listener.
-  if (mProposedRotation != oldProposedRotation && mProposedRotation >= 0) {
-    LOGD
-      ("ProcessOrientation: Proposed rotation changed!  proposedRotation=%d, "
-       "oldProposedRotation=%d",
-       mProposedRotation,
-       oldProposedRotation);
-    return mProposedRotation;
-  }
-  // Don't rotate screen
-  return -1;
-}
-
-bool
-ProcessOrientation::IsTiltAngleAcceptable(int rotation, int tiltAngle)
-{
-  return (tiltAngle >= tiltTolerance[rotation][0]
-          && tiltAngle <= tiltTolerance[rotation][1]);
-}
-
-bool
-ProcessOrientation::IsOrientationAngleAcceptable(int rotation,
-                                                 int orientationAngle,
-                                                 int currentRotation)
-{
-  // If there is no current rotation, then there is no gap.
-  // The gap is used only to introduce hysteresis among advertised orientation
-  // changes to avoid flapping.
-  if (currentRotation < 0) {
-    return true;
-  }
-  // If the specified rotation is the same or is counter-clockwise adjacent
-  // to the current rotation, then we set a lower bound on the orientation
-  // angle. For example, if currentRotation is ROTATION_0 and proposed is
-  // ROTATION_90, then we want to check orientationAngle > 45 + GAP / 2.
-  if (rotation == currentRotation || rotation == (currentRotation + 1) % 4) {
-    int lowerBound = rotation * 90 - 45 + ADJACENT_ORIENTATION_ANGLE_GAP / 2;
-    if (rotation == 0) {
-      if (orientationAngle >= 315 && orientationAngle < lowerBound + 360) {
-        return false;
-      }
-    } else {
-      if (orientationAngle < lowerBound) {
-        return false;
-      }
-    }
-  }
-  // If the specified rotation is the same or is clockwise adjacent, then we
-  // set an upper bound on the orientation angle. For example, if
-  // currentRotation is ROTATION_0 and rotation is ROTATION_270, then we want
-  // to check orientationAngle < 315 - GAP / 2.
-  if (rotation == currentRotation || rotation == (currentRotation + 3) % 4) {
-    int upperBound = rotation * 90 + 45 - ADJACENT_ORIENTATION_ANGLE_GAP / 2;
-    if (rotation == 0) {
-      if (orientationAngle <= 45 && orientationAngle > upperBound) {
-        return false;
-      }
-    } else {
-      if (orientationAngle > upperBound) {
-        return false;
-      }
-    }
-  }
-  return true;
-}
-
-bool
-ProcessOrientation::IsPredictedRotationAcceptable(int64_t now)
-{
-  // The predicted rotation must have settled long enough.
-  if (now < mPredictedRotationTimestampNanos + PROPOSAL_SETTLE_TIME_NANOS) {
-    return false;
-  }
-  // The last flat state (time since picked up) must have been sufficiently long
-  // ago.
-  if (now < mFlatTimestampNanos + PROPOSAL_MIN_TIME_SINCE_FLAT_ENDED_NANOS) {
-    return false;
-  }
-  // The last swing state (time since last movement to put down) must have been
-  // sufficiently long ago.
-  if (now < mSwingTimestampNanos + PROPOSAL_MIN_TIME_SINCE_SWING_ENDED_NANOS) {
-    return false;
-  }
-  // The last acceleration state must have been sufficiently long ago.
-  if (now < mAccelerationTimestampNanos
-      + PROPOSAL_MIN_TIME_SINCE_ACCELERATION_ENDED_NANOS) {
-    return false;
-  }
-  // Looks good!
-  return true;
-}
-
-int
-ProcessOrientation::Reset()
-{
-  mLastFilteredTimestampNanos = std::numeric_limits<int64_t>::min();
-  mProposedRotation = -1;
-  mFlatTimestampNanos = std::numeric_limits<int64_t>::min();
-  mSwingTimestampNanos = std::numeric_limits<int64_t>::min();
-  mAccelerationTimestampNanos = std::numeric_limits<int64_t>::min();
-  ClearPredictedRotation();
-  ClearTiltHistory();
-  return -1;
-}
-
-void
-ProcessOrientation::ClearPredictedRotation()
-{
-  mPredictedRotation = -1;
-  mPredictedRotationTimestampNanos = std::numeric_limits<int64_t>::min();
-}
-
-void
-ProcessOrientation::UpdatePredictedRotation(int64_t now, int rotation)
-{
-  if (mPredictedRotation != rotation) {
-    mPredictedRotation = rotation;
-    mPredictedRotationTimestampNanos = now;
-  }
-}
-
-bool
-ProcessOrientation::IsAccelerating(float magnitude)
-{
-  return magnitude < MIN_ACCELERATION_MAGNITUDE
-    || magnitude > MAX_ACCELERATION_MAGNITUDE;
-}
-
-void
-ProcessOrientation::ClearTiltHistory()
-{
-  mTiltHistory.history[0].timestampNanos = std::numeric_limits<int64_t>::min();
-  mTiltHistory.index = 1;
-}
-
-void
-ProcessOrientation::AddTiltHistoryEntry(int64_t now, float tilt)
-{
-  mTiltHistory.history[mTiltHistory.index].tiltAngle = tilt;
-  mTiltHistory.history[mTiltHistory.index].timestampNanos = now;
-  mTiltHistory.index = (mTiltHistory.index + 1) % TILT_HISTORY_SIZE;
-  mTiltHistory.history[mTiltHistory.index].timestampNanos = std::numeric_limits<int64_t>::min();
-}
-
-bool
-ProcessOrientation::IsFlat(int64_t now)
-{
-  for (int i = mTiltHistory.index; (i = NextTiltHistoryIndex(i)) >= 0;) {
-    if (mTiltHistory.history[i].tiltAngle < FLAT_ANGLE) {
-      break;
-    }
-    if (mTiltHistory.history[i].timestampNanos + FLAT_TIME_NANOS <= now) {
-      // Tilt has remained greater than FLAT_TILT_ANGLE for FLAT_TIME_NANOS.
-      return true;
-    }
-  }
-  return false;
-}
-
-bool
-ProcessOrientation::IsSwinging(int64_t now, float tilt)
-{
-  for (int i = mTiltHistory.index; (i = NextTiltHistoryIndex(i)) >= 0;) {
-    if (mTiltHistory.history[i].timestampNanos + SWING_TIME_NANOS < now) {
-      break;
-    }
-    if (mTiltHistory.history[i].tiltAngle + SWING_AWAY_ANGLE_DELTA <= tilt) {
-      // Tilted away by SWING_AWAY_ANGLE_DELTA within SWING_TIME_NANOS.
-      return true;
-    }
-  }
-  return false;
-}
-
-int
-ProcessOrientation::NextTiltHistoryIndex(int index)
-{
-  index = (index == 0 ? TILT_HISTORY_SIZE : index) - 1;
-  return mTiltHistory.history[index].timestampNanos != std::numeric_limits<int64_t>::min() ? index : -1;
-}
-
-float
-ProcessOrientation::RemainingMS(int64_t now, int64_t until)
-{
-  return now >= until ? 0 : (until - now) * 0.000001f;
-}
-
-} // namespace mozilla