Issue #1538 - remove speech recognition engine

This removes speech recognition, pocketsphinx, training models
and the speech automated test interface.
This also re-establishes proper use of MOZ_WEBSPEECH to work
for the speech API (synthesis part only) that was a broken mess
before, with some synth parts being always built, some parts
being built only with it enabled and recognition parts being
dependent on it. I'm pretty sure it'd be totally busted if you'd
ever have tried building without MOZ_WEBPEECH before.

Tested that synthesis still works as-intended.

This resolves #1538

1 files changed, 0 insertions, 180 deletions

diff --git a/dom/media/webspeech/recognition/energy_endpointer.h b/dom/media/webspeech/recognition/energy_endpointer.h
deleted file mode 100644
index 2380ecf4b..000000000
--- a/dom/media/webspeech/recognition/energy_endpointer.h
+++ /dev/null
@@ -1,180 +0,0 @@
-// Copyright (c) 2013 The Chromium Authors. All rights reserved.
-//
-// Redistribution and use in source and binary forms, with or without
-// modification, are permitted provided that the following conditions are
-// met:
-//
-//    * Redistributions of source code must retain the above copyright
-// notice, this list of conditions and the following disclaimer.
-//    * Redistributions in binary form must reproduce the above
-// copyright notice, this list of conditions and the following disclaimer
-// in the documentation and/or other materials provided with the
-// distribution.
-//    * Neither the name of Google Inc. nor the names of its
-// contributors may be used to endorse or promote products derived from
-// this software without specific prior written permission.
-//
-// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
-// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
-// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
-// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
-// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
-// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
-// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
-// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
-// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
-// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-
-// The EnergyEndpointer class finds likely speech onset and offset points.
-//
-// The implementation described here is about the simplest possible.
-// It is based on timings of threshold crossings for overall signal
-// RMS. It is suitable for light weight applications.
-//
-// As written, the basic idea is that one specifies intervals that
-// must be occupied by super- and sub-threshold energy levels, and
-// defers decisions re onset and offset times until these
-// specifications have been met.  Three basic intervals are tested: an
-// onset window, a speech-on window, and an offset window.  We require
-// super-threshold to exceed some mimimum total durations in the onset
-// and speech-on windows before declaring the speech onset time, and
-// we specify a required sub-threshold residency in the offset window
-// before declaring speech offset. As the various residency requirements are
-// met, the EnergyEndpointer instance assumes various states, and can return the
-// ID of these states to the client (see EpStatus below).
-//
-// The levels of the speech and background noise are continuously updated. It is
-// important that the background noise level be estimated initially for
-// robustness in noisy conditions. The first frames are assumed to be background
-// noise and a fast update rate is used for the noise level. The duration for
-// fast update is controlled by the fast_update_dur_ paramter.
-//
-// If used in noisy conditions, the endpointer should be started and run in the
-// EnvironmentEstimation mode, for at least 200ms, before switching to
-// UserInputMode.
-// Audio feedback contamination can appear in the input audio, if not cut
-// out or handled by echo cancellation. Audio feedback can trigger a false
-// accept. The false accepts can be ignored by setting
-// ep_contamination_rejection_period.
-
-#ifndef CONTENT_BROWSER_SPEECH_ENDPOINTER_ENERGY_ENDPOINTER_H_
-#define CONTENT_BROWSER_SPEECH_ENDPOINTER_ENERGY_ENDPOINTER_H_
-
-#include <vector>
-
-#include "nsAutoPtr.h"
-
-#include "energy_endpointer_params.h"
-
-namespace mozilla {
-
-// Endpointer status codes
-enum EpStatus {
-  EP_PRE_SPEECH = 10,
-  EP_POSSIBLE_ONSET,
-  EP_SPEECH_PRESENT,
-  EP_POSSIBLE_OFFSET,
-  EP_POST_SPEECH,
-};
-
-class EnergyEndpointer {
- public:
-  // The default construction MUST be followed by Init(), before any
-  // other use can be made of the instance.
-  EnergyEndpointer();
-  virtual ~EnergyEndpointer();
-
-  void Init(const EnergyEndpointerParams& params);
-
-  // Start the endpointer. This should be called at the beginning of a session.
-  void StartSession();
-
-  // Stop the endpointer.
-  void EndSession();
-
-  // Start environment estimation. Audio will be used for environment estimation
-  // i.e. noise level estimation.
-  void SetEnvironmentEstimationMode();
-
-  // Start user input. This should be called when the user indicates start of
-  // input, e.g. by pressing a button.
-  void SetUserInputMode();
-
-  // Computes the next input frame and modifies EnergyEndpointer status as
-  // appropriate based on the computation.
-  void ProcessAudioFrame(int64_t time_us,
-                         const int16_t* samples, int num_samples,
-                         float* rms_out);
-
-  // Returns the current state of the EnergyEndpointer and the time
-  // corresponding to the most recently computed frame.
-  EpStatus Status(int64_t* status_time_us) const;
-
-  bool estimating_environment() const {
-    return estimating_environment_;
-  }
-
-  // Returns estimated noise level in dB.
-  float GetNoiseLevelDb() const;
-
- private:
-  class HistoryRing;
-
-  // Resets the endpointer internal state.  If reset_threshold is true, the
-  // state will be reset completely, including adaptive thresholds and the
-  // removal of all history information.
-  void Restart(bool reset_threshold);
-
-  // Update internal speech and noise levels.
-  void UpdateLevels(float rms);
-
-  // Returns the number of frames (or frame number) corresponding to
-  // the 'time' (in seconds).
-  int TimeToFrame(float time) const;
-
-  EpStatus status_;  // The current state of this instance.
-  float offset_confirm_dur_sec_;  // max on time allowed to confirm POST_SPEECH
-  int64_t endpointer_time_us_;  // Time of the most recently received audio frame.
-  int64_t fast_update_frames_; // Number of frames for initial level adaptation.
-  int64_t frame_counter_;  // Number of frames seen. Used for initial adaptation.
-  float max_window_dur_;  // Largest search window size (seconds)
-  float sample_rate_;  // Sampling rate.
-
-  // Ring buffers to hold the speech activity history.
-  nsAutoPtr<HistoryRing> history_;
-
-  // Configuration parameters.
-  EnergyEndpointerParams params_;
-
-  // RMS which must be exceeded to conclude frame is speech.
-  float decision_threshold_;
-
-  // Flag to indicate that audio should be used to estimate environment, prior
-  // to receiving user input.
-  bool estimating_environment_;
-
-  // Estimate of the background noise level. Used externally for UI feedback.
-  float noise_level_;
-
-  // An adaptive threshold used to update decision_threshold_ when appropriate.
-  float rms_adapt_;
-
-  // Start lag corresponds to the highest fundamental frequency.
-  int start_lag_;
-
-  // End lag corresponds to the lowest fundamental frequency.
-  int end_lag_;
-
-  // Time when mode switched from environment estimation to user input. This
-  // is used to time forced rejection of audio feedback contamination.
-  int64_t user_input_start_time_us_;
-
-  // prevent copy constructor and assignment
-  EnergyEndpointer(const EnergyEndpointer&);
-  void operator=(const EnergyEndpointer&);
-};
-
-}  // namespace mozilla
-
-#endif  // CONTENT_BROWSER_SPEECH_ENDPOINTER_ENERGY_ENDPOINTER_H_