Revert 173550

chrome/browser/speech/extension_api/tts_extension_api_linux.cc

Index: chrome/browser/speech/extension_api/tts_extension_api_linux.cc
===================================================================
--- chrome/browser/speech/extension_api/tts_extension_api_linux.cc	(revision 173560)
+++ chrome/browser/speech/extension_api/tts_extension_api_linux.cc	(working copy)
@@ -2,23 +2,150 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
+#include <dlfcn.h>
 #include <math.h>
 
 #include "base/memory/singleton.h"
 #include "chrome/browser/speech/extension_api/tts_extension_api_platform.h"
 #include "content/public/browser/browser_thread.h"
 
-#include "library_loaders/libspeechd.h"
-
 using content::BrowserThread;
 
 namespace {
-
 const char kNotSupportedError[] =
     "Native speech synthesis not supported on this platform.";
 
-}  // namespace
+// Speech dispatcher exports.
+// The following types come from the libspeechd-dev package/libspeechd.h.
+typedef enum {
+  SPD_MODE_SINGLE = 0,
+  SPD_MODE_THREADED = 1
+} SPDConnectionMode;
 
+typedef enum {
+  SPD_IMPORTANT = 1,
+  SPD_MESSAGE = 2,
+  SPD_TEXT = 3,
+  SPD_NOTIFICATION = 4,
+  SPD_PROGRESS = 5
+} SPDPriority;
+
+typedef enum {
+  SPD_EVENT_BEGIN,
+  SPD_EVENT_END,
+  SPD_EVENT_CANCEL,
+  SPD_EVENT_PAUSE,
+  SPD_EVENT_RESUME,
+  SPD_EVENT_INDEX_MARK
+} SPDNotificationType;
+
+typedef enum {
+  SPD_BEGIN = 1,
+  SPD_END = 2,
+  SPD_INDEX_MARKS = 4,
+  SPD_CANCEL = 8,
+  SPD_PAUSE = 16,
+  SPD_RESUME = 32
+} SPDNotification;
+
+typedef void (*SPDCallback)(
+    size_t msg_id, size_t client_id, SPDNotificationType state);
+typedef void (*SPDCallbackIM)(size_t msg_id,
+                              size_t client_id,
+                              SPDNotificationType state,
+                              char* index_mark);
+
+typedef struct {
+  /* PUBLIC */
+  SPDCallback callback_begin;
+  SPDCallback callback_end;
+  SPDCallback callback_cancel;
+  SPDCallback callback_pause;
+  SPDCallback callback_resume;
+  SPDCallbackIM callback_im;
+
+  /* PRIVATE */
+  int socket;
+  FILE* stream;
+  SPDConnectionMode mode;
+
+  pthread_mutex_t* ssip_mutex;
+
+  pthread_t* events_thread;
+  pthread_mutex_t* comm_mutex;
+  pthread_cond_t* cond_reply_ready;
+  pthread_mutex_t* mutex_reply_ready;
+  pthread_cond_t* cond_reply_ack;
+  pthread_mutex_t* mutex_reply_ack;
+
+  char* reply;
+} SPDConnection;
+
+typedef SPDConnection* (*spd_open_func)(const char* client_name,
+    const char* connection_name,
+    const char* user_name,
+    SPDConnectionMode mode);
+typedef int (*spd_say_func)(SPDConnection* connection,
+                            SPDPriority priority,
+                            const char* text);
+typedef int (*spd_stop_func)(SPDConnection* connection);
+typedef void (*spd_close_func)(SPDConnection* connection);
+typedef int (*spd_set_notification_on_func)(SPDConnection* connection,
+                                            SPDNotification notification);
+typedef int (*spd_set_voice_rate_func)(SPDConnection* connection, int rate);
+typedef int (*spd_set_voice_pitch_func)(SPDConnection* connection, int pitch);
+};
+
+class SpeechDispatcherWrapper {
+ public:
+  static SPDNotificationType current_notification_;
+
+  SpeechDispatcherWrapper();
+  ~SpeechDispatcherWrapper();
+
+  bool Speak(const char* text);
+  bool IsSpeaking();
+  bool StopSpeaking();
+  void SetRate(int rate);
+  void SetPitch(int pitch);
+
+  // Resets the connection with speech dispatcher.
+  void Reset();
+
+  // States whether Speech Dispatcher loaded successfully.
+  bool loaded() {
+    return loaded_;
+  }
+
+ private:
+  static void NotificationCallback(size_t msg_id,
+                                   size_t client_id,
+                                   SPDNotificationType type);
+
+  static void IndexMarkCallback(size_t msg_id,
+                                size_t client_id,
+                                SPDNotificationType state,
+                                char* index_mark);
+
+  // Interface bindings.
+  spd_open_func spd_open;
+  spd_say_func spd_say;
+  spd_stop_func spd_stop;
+  spd_close_func spd_close;
+  spd_set_notification_on_func spd_set_notification_on;
+  spd_set_voice_rate_func spd_set_voice_rate;
+  spd_set_voice_pitch_func spd_set_voice_pitch;
+
+  bool loaded_;
+  void* library_;
+  SPDConnection* conn_;
+  DISALLOW_COPY_AND_ASSIGN(SpeechDispatcherWrapper);
+};
+
+// static
+SPDNotificationType SpeechDispatcherWrapper::current_notification_ =
+    SPD_EVENT_END;
+
 class ExtensionTtsPlatformImplLinux : public ExtensionTtsPlatformImpl {
  public:
   virtual bool PlatformImplAvailable();
@@ -36,26 +163,11 @@
   static ExtensionTtsPlatformImplLinux* GetInstance();
 
  private:
-  ExtensionTtsPlatformImplLinux();
-  virtual ~ExtensionTtsPlatformImplLinux();
+  ExtensionTtsPlatformImplLinux(): utterance_id_(0) {}
+  virtual ~ExtensionTtsPlatformImplLinux() {}
 
-  // Resets the connection with speech dispatcher.
-  void Reset();
+  SpeechDispatcherWrapper spd_;
 
-  static void NotificationCallback(size_t msg_id,
-                                   size_t client_id,
-                                   SPDNotificationType type);
-
-  static void IndexMarkCallback(size_t msg_id,
-                                size_t client_id,
-                                SPDNotificationType state,
-                                char* index_mark);
-
-  static SPDNotificationType current_notification_;
-
-  LibSpeechdLoader libspeechd_loader_;
-  SPDConnection* conn_;
-
   // These apply to the current utterance only.
   std::string utterance_;
   int utterance_id_;
@@ -65,61 +177,157 @@
   DISALLOW_COPY_AND_ASSIGN(ExtensionTtsPlatformImplLinux);
 };
 
-// static
-SPDNotificationType ExtensionTtsPlatformImplLinux::current_notification_ =
-    SPD_EVENT_END;
+SpeechDispatcherWrapper::SpeechDispatcherWrapper() : loaded_(false) {
+  library_ = dlopen("libspeechd.so", RTLD_LAZY);
+  if (!library_)
+    return;
 
-ExtensionTtsPlatformImplLinux::ExtensionTtsPlatformImplLinux()
-    : utterance_id_(0) {
-  if (!libspeechd_loader_.Load("libspeechd.so.2"))
+  spd_open = reinterpret_cast<spd_open_func>(dlsym(library_, "spd_open"));
+  if (!spd_open)
     return;
 
-  conn_ = libspeechd_loader_.spd_open(
-      "chrome", "extension_api", NULL, SPD_MODE_THREADED);
+  spd_say = reinterpret_cast<spd_say_func>(dlsym(library_, "spd_say"));
+  if (!spd_say)
+    return;
+
+  spd_stop = reinterpret_cast<spd_stop_func>(dlsym(library_, "spd_stop"));
+  if (!spd_stop)
+    return;
+
+  spd_close = reinterpret_cast<spd_close_func>(dlsym(library_, "spd_close"));
+  if (!spd_close)
+    return;
+
+  conn_ = spd_open("chrome", "extension_api", NULL, SPD_MODE_THREADED);
   if (!conn_)
     return;
 
+  spd_set_notification_on = reinterpret_cast<spd_set_notification_on_func>(
+      dlsym(library_, "spd_set_notification_on"));
+  if (!spd_set_notification_on)
+    return;
+
+  spd_set_voice_rate = reinterpret_cast<spd_set_voice_rate_func>(
+      dlsym(library_, "spd_set_voice_rate"));
+  if (!spd_set_voice_rate)
+    return;
+
+  spd_set_voice_pitch = reinterpret_cast<spd_set_voice_pitch_func>(
+      dlsym(library_, "spd_set_voice_pitch"));
+  if (!spd_set_voice_pitch)
+    return;
+
   // Register callbacks for all events.
   conn_->callback_begin =
     conn_->callback_end =
     conn_->callback_cancel =
     conn_->callback_pause =
     conn_->callback_resume =
-    &NotificationCallback;
+    &SpeechDispatcherWrapper::NotificationCallback;
 
-  conn_->callback_im = &IndexMarkCallback;
+  conn_->callback_im = &SpeechDispatcherWrapper::IndexMarkCallback;
 
-  libspeechd_loader_.spd_set_notification_on(conn_, SPD_BEGIN);
-  libspeechd_loader_.spd_set_notification_on(conn_, SPD_END);
-  libspeechd_loader_.spd_set_notification_on(conn_, SPD_CANCEL);
-  libspeechd_loader_.spd_set_notification_on(conn_, SPD_PAUSE);
-  libspeechd_loader_.spd_set_notification_on(conn_, SPD_RESUME);
+  spd_set_notification_on(conn_, SPD_BEGIN);
+  spd_set_notification_on(conn_, SPD_END);
+  spd_set_notification_on(conn_, SPD_CANCEL);
+  spd_set_notification_on(conn_, SPD_PAUSE);
+  spd_set_notification_on(conn_, SPD_RESUME);
+
+  loaded_ = true;
 }
 
-ExtensionTtsPlatformImplLinux::~ExtensionTtsPlatformImplLinux() {
+SpeechDispatcherWrapper::~SpeechDispatcherWrapper() {
   if (conn_) {
-    libspeechd_loader_.spd_close(conn_);
+    spd_close(conn_);
     conn_ = NULL;
   }
+
+  if (library_) {
+    dlclose(library_);
+    library_ = NULL;
+  }
 }
+bool SpeechDispatcherWrapper::Speak(const char* text) {
+  if (!loaded())
+    return false;
+  if (spd_say(conn_, SPD_TEXT, text) == -1) {
+    Reset();
+    return false;
+  }
+  return true;
+}
 
-void ExtensionTtsPlatformImplLinux::Reset() {
+bool SpeechDispatcherWrapper::IsSpeaking() {
+  return SpeechDispatcherWrapper::current_notification_ == SPD_EVENT_BEGIN;
+}
+
+bool SpeechDispatcherWrapper::StopSpeaking() {
+  if (!loaded())
+    return false;
+  if (spd_stop(conn_) == -1) {
+    Reset();
+    return false;
+  }
+  return true;
+}
+void SpeechDispatcherWrapper::SetRate(int rate) {
+  spd_set_voice_rate(conn_, rate);
+}
+
+void SpeechDispatcherWrapper::SetPitch(int pitch) {
+  spd_set_voice_pitch(conn_, pitch);
+}
+
+// Resets the connection with speech dispatcher.
+void SpeechDispatcherWrapper::Reset() {
   if (conn_)
-    libspeechd_loader_.spd_close(conn_);
-  conn_ = libspeechd_loader_.spd_open(
-      "chrome", "extension_api", NULL, SPD_MODE_THREADED);
+    spd_close(conn_);
+  conn_ = spd_open("chrome", "extension_api", NULL, SPD_MODE_THREADED);
 }
 
+// static
+void SpeechDispatcherWrapper::NotificationCallback(
+    size_t msg_id, size_t client_id, SPDNotificationType type) {
+  // We run Speech Dispatcher in threaded mode, so these callbacks should always
+  // be in a separate thread.
+  if (!BrowserThread::CurrentlyOn(BrowserThread::UI)) {
+    SpeechDispatcherWrapper::current_notification_ = type;
+    BrowserThread::PostTask(BrowserThread::UI, FROM_HERE,
+        base::Bind(&ExtensionTtsPlatformImplLinux::OnSpeechEvent,
+        base::Unretained(ExtensionTtsPlatformImplLinux::GetInstance()),
+        type));
+  }
+}
+
+// static
+void SpeechDispatcherWrapper::IndexMarkCallback(size_t msg_id,
+    size_t client_id,
+    SPDNotificationType state,
+    char* index_mark) {
+  // TODO(dtseng): index_mark appears to specify an index type supplied by a
+  // client. Need to explore how this is used before hooking it up with existing
+  // word, sentence events.
+  // We run Speech Dispatcher in threaded mode, so these callbacks should always
+  // be in a separate thread.
+  if (!BrowserThread::CurrentlyOn(BrowserThread::UI)) {
+    SpeechDispatcherWrapper::current_notification_ = state;
+    BrowserThread::PostTask(BrowserThread::UI, FROM_HERE,
+        base::Bind(&ExtensionTtsPlatformImplLinux::OnSpeechEvent,
+        base::Unretained(ExtensionTtsPlatformImplLinux::GetInstance()),
+        state));
+  }
+}
+
 bool ExtensionTtsPlatformImplLinux::PlatformImplAvailable() {
-  return libspeechd_loader_.loaded() && (conn_ != NULL);
+  return spd_.loaded();
 }
 
 bool ExtensionTtsPlatformImplLinux::Speak(
-    int utterance_id,
-    const std::string& utterance,
-    const std::string& lang,
-    const UtteranceContinuousParameters& params) {
-  if (!PlatformImplAvailable()) {
+                   int utterance_id,
+                   const std::string& utterance,
+                   const std::string& lang,
+                   const UtteranceContinuousParameters& params) {
+  if (!spd_.loaded()) {
     error_ = kNotSupportedError;
     return false;
   }
@@ -133,31 +341,22 @@
   // Map our multiplicative range to Speech Dispatcher's linear range.
   // .334 = -100.
   // 3 = 100.
-  libspeechd_loader_.spd_set_voice_rate(conn_, 100 * log10(rate) / log10(3));
-  libspeechd_loader_.spd_set_voice_pitch(conn_, 100 * log10(pitch) / log10(3));
+  spd_.SetRate(100 * log10(rate) / log10(3));
+  spd_.SetPitch(100 * log10(pitch) / log10(3));
 
   utterance_ = utterance;
   utterance_id_ = utterance_id;
 
-  if (libspeechd_loader_.spd_say(conn_, SPD_TEXT, utterance.c_str()) == -1) {
-    Reset();
-    return false;
-  }
+  spd_.Speak(utterance.c_str());
   return true;
 }
 
 bool ExtensionTtsPlatformImplLinux::StopSpeaking() {
-  if (!PlatformImplAvailable())
-    return false;
-  if (libspeechd_loader_.spd_stop(conn_) == -1) {
-    Reset();
-    return false;
-  }
-  return true;
+  return spd_.StopSpeaking();
 }
 
 bool ExtensionTtsPlatformImplLinux::IsSpeaking() {
-  return current_notification_ == SPD_EVENT_BEGIN;
+  return spd_.IsSpeaking();
 }
 
 bool ExtensionTtsPlatformImplLinux::SendsEvent(TtsEventType event_type) {
@@ -190,39 +389,6 @@
 }
 
 // static
-void ExtensionTtsPlatformImplLinux::NotificationCallback(
-    size_t msg_id, size_t client_id, SPDNotificationType type) {
-  // We run Speech Dispatcher in threaded mode, so these callbacks should always
-  // be in a separate thread.
-  if (!BrowserThread::CurrentlyOn(BrowserThread::UI)) {
-    current_notification_ = type;
-    BrowserThread::PostTask(BrowserThread::UI, FROM_HERE,
-        base::Bind(&ExtensionTtsPlatformImplLinux::OnSpeechEvent,
-        base::Unretained(ExtensionTtsPlatformImplLinux::GetInstance()),
-        type));
-  }
-}
-
-// static
-void ExtensionTtsPlatformImplLinux::IndexMarkCallback(size_t msg_id,
-                                                      size_t client_id,
-                                                      SPDNotificationType state,
-                                                      char* index_mark) {
-  // TODO(dtseng): index_mark appears to specify an index type supplied by a
-  // client. Need to explore how this is used before hooking it up with existing
-  // word, sentence events.
-  // We run Speech Dispatcher in threaded mode, so these callbacks should always
-  // be in a separate thread.
-  if (!BrowserThread::CurrentlyOn(BrowserThread::UI)) {
-    current_notification_ = state;
-    BrowserThread::PostTask(BrowserThread::UI, FROM_HERE,
-        base::Bind(&ExtensionTtsPlatformImplLinux::OnSpeechEvent,
-        base::Unretained(ExtensionTtsPlatformImplLinux::GetInstance()),
-        state));
-  }
-}
-
-// static
 ExtensionTtsPlatformImplLinux* ExtensionTtsPlatformImplLinux::GetInstance() {
   return Singleton<ExtensionTtsPlatformImplLinux,
                    LeakySingletonTraits<ExtensionTtsPlatformImplLinux> >::get();