Refactored OpenGL embedder that works on Android, Mac or Linux.

runtime/embedders/openglui/android/android_sound_handler.cc

Index: runtime/embedders/openglui/android/android_sound_handler.cc
===================================================================
--- runtime/embedders/openglui/android/android_sound_handler.cc	(revision 0)
+++ runtime/embedders/openglui/android/android_sound_handler.cc	(revision 0)
@@ -0,0 +1,258 @@
+// Copyright (c) 2012, the Dart project authors.  Please see the AUTHORS file
+// for details. All rights reserved. Use of this source code is governed by a
+// BSD-style license that can be found in the LICENSE file.
+
+#include "embedders/openglui/android/android_sound_handler.h"
+
+#include "embedders/openglui/android/android_resource.h"
+#include "embedders/openglui/common/log.h"
+
+AndroidSoundHandler::AndroidSoundHandler(android_app* application)
+    : SoundHandler(),
+      application_(application),
+      engine_(NULL),
+      engine_if_(NULL),
+      output_mix_(NULL),
+      background_player_(NULL),
+      background_player_if_(NULL),
+      background_player_seek_if_(NULL),
+      sample_player_(NULL),
+      sample_player_if_(NULL),
+      sample_player_queue_(NULL) {
+  SoundHandler::instance_ = this;
+}
+
+int32_t AndroidSoundHandler::Start() {
+  LOGI("Starting SoundService");
+
+  const SLInterfaceID k_engine_mix_IIDs[] = { SL_IID_ENGINE };
+  const SLboolean k_engine_mix_reqs[] = { SL_BOOLEAN_TRUE };
+  const SLInterfaceID k_output_mix_IIDs[] = {};
+  const SLboolean k_output_mix_reqs[] = {};
+  int32_t res = slCreateEngine(&engine_, 0, NULL, 1,
+                               k_engine_mix_IIDs, k_engine_mix_reqs);
+  if (res == SL_RESULT_SUCCESS) {
+    res = (*engine_)->Realize(engine_, SL_BOOLEAN_FALSE);
+    if (res == SL_RESULT_SUCCESS) {
+      res = (*engine_)->GetInterface(engine_, SL_IID_ENGINE, &engine_if_);
+      if (res == SL_RESULT_SUCCESS) {
+        res = (*engine_if_)->CreateOutputMix(engine_if_, &output_mix_, 0,
+                                  k_output_mix_IIDs, k_output_mix_reqs);
+        if (res == SL_RESULT_SUCCESS) {
+          res = (*output_mix_)->Realize(output_mix_, SL_BOOLEAN_FALSE);
+          if (res == SL_RESULT_SUCCESS) {
+            if (StartSamplePlayer() == 0) {
+              return 0;
+            }
+          }
+        }
+      }
+    }
+  }
+  LOGI("Failed to start SoundService");
+  Stop();
+  return -1;
+}
+
+void AndroidSoundHandler::Stop() {
+  StopBackground();
+  if (output_mix_ != NULL) {
+    (*output_mix_)->Destroy(output_mix_);
+    output_mix_ = NULL;
+  }
+  if (engine_ != NULL) {
+    (*engine_)->Destroy(engine_);
+    engine_ = NULL;
+    engine_if_ = NULL;
+  }
+  if (sample_player_ != NULL) {
+    (*sample_player_)->Destroy(sample_player_);
+    sample_player_ = NULL;
+    sample_player_if_ = NULL;
+    sample_player_queue_ = NULL;
+  }
+  samples_.clear();
+}
+
+int32_t AndroidSoundHandler::CreateAudioPlayer(SLEngineItf engine_if,
+                                        const SLInterfaceID extra_if,
+                                        SLDataSource data_source,
+                                        SLDataSink data_sink,
+                                        SLObjectItf& player_out,
+                                        SLPlayItf& player_if_out) {
+  const SLuint32 SoundPlayerIIDCount = 2;
+  const SLInterfaceID SoundPlayerIIDs[] = { SL_IID_PLAY, extra_if };
+  const SLboolean SoundPlayerReqs[] = { SL_BOOLEAN_TRUE, SL_BOOLEAN_TRUE };
+  int32_t res = (*engine_if)->CreateAudioPlayer(engine_if,
+                                                &player_out,
+                                                &data_source,
+                                                &data_sink,
+                                                SoundPlayerIIDCount,
+                                                SoundPlayerIIDs,
+                                                SoundPlayerReqs);
+
+  if (res == SL_RESULT_SUCCESS) {
+    res = (*player_out)->Realize(player_out, SL_BOOLEAN_FALSE);
+    if (res == SL_RESULT_SUCCESS) {
+      res = (*player_out)->GetInterface(sample_player_,
+                                            SL_IID_PLAY,
+                                            &player_if_out);
+      if (res == SL_RESULT_SUCCESS) {
+        return 0;
+      }
+    }
+  }
+  return -1;
+}
+
+int32_t AndroidSoundHandler::PlayBackground(const char* path) {
+  LOGI("Creating audio player");
+
+  Resource resource(path);
+  int fd = resource.descriptor();
+  if (fd < 0) {
+    LOGI("Could not open file %s", path);
+    return -1;
+  }
+
+  SLDataLocator_AndroidFD data_locator_in = {
+      SL_DATALOCATOR_ANDROIDFD,
+      fd,
+      resource.start(),
+      resource.length()
+  };
+  SLDataFormat_MIME data_format = {
+      SL_DATAFORMAT_MIME,
+      NULL,
+      SL_CONTAINERTYPE_UNSPECIFIED
+  };
+  SLDataSource data_source = { &data_locator_in, &data_format };
+
+  resource.Close();
+
+  SLDataLocator_OutputMix data_locator_out =
+      { SL_DATALOCATOR_OUTPUTMIX, output_mix_ };
+  SLDataSink data_sink = { &data_locator_out, NULL };
+
+  int32_t res = CreateAudioPlayer(engine_if_,
+                                  SL_IID_SEEK,
+                                  data_source,
+                                  data_sink,
+                                  background_player_,
+                                  background_player_if_);
+
+  if (res != SL_RESULT_SUCCESS) {
+    LOGE("Couldn't create audio player");
+    return -1;
+  }
+
+  if ((*background_player_)->
+          GetInterface(background_player_, SL_IID_SEEK,
+                       &background_player_seek_if_) != SL_RESULT_SUCCESS) {
+    LOGE("Couldn't get seek interface");
+    return -1;
+  }
+  LOGI("Got seek interface");
+  if ((*background_player_seek_if_)->
+          SetLoop(background_player_seek_if_, SL_BOOLEAN_TRUE, 0,
+                  SL_TIME_UNKNOWN) != SL_RESULT_SUCCESS) {
+    LOGE("Couldn't set loop");
+    return -1;
+  }
+  LOGI("Set loop");
+  if ((*background_player_if_)->
+          SetPlayState(background_player_if_, SL_PLAYSTATE_PLAYING) !=
+          SL_RESULT_SUCCESS) {
+    LOGE("Couldn't start playing");
+    return -1;
+  }
+  LOGI("Started playing");
+  return 0;
+}
+
+void AndroidSoundHandler::StopBackground() {
+  if (background_player_if_ != NULL) {
+    SLuint32 state;
+    (*background_player_)->GetState(background_player_, &state);
+    if (state == SL_OBJECT_STATE_REALIZED) {
+      (*background_player_if_)->SetPlayState(background_player_if_,
+                                           SL_PLAYSTATE_PAUSED);
+
+      (*background_player_)->Destroy(background_player_);
+      background_player_ = NULL;
+      background_player_if_ = NULL;
+      background_player_seek_if_ = NULL;
+    }
+  }
+}
+
+int32_t AndroidSoundHandler::StartSamplePlayer() {
+  SLDataLocator_AndroidSimpleBufferQueue data_locator_in = {
+    SL_DATALOCATOR_ANDROIDSIMPLEBUFFERQUEUE,
+    1
+  };
+
+  SLDataFormat_PCM data_format= {
+    SL_DATAFORMAT_PCM,
+    1,
+    SL_SAMPLINGRATE_44_1,
+    SL_PCMSAMPLEFORMAT_FIXED_16,
+    SL_PCMSAMPLEFORMAT_FIXED_16,
+    SL_SPEAKER_FRONT_CENTER,
+    SL_BYTEORDER_LITTLEENDIAN
+  };
+
+  SLDataSource data_source = { &data_locator_in, &data_format };
+
+  SLDataLocator_OutputMix data_locator_out =
+      { SL_DATALOCATOR_OUTPUTMIX, output_mix_ };
+  SLDataSink data_sink = { &data_locator_out, NULL };
+
+  int32_t res = CreateAudioPlayer(engine_if_, SL_IID_BUFFERQUEUE,
+                                  data_source,
+                                  data_sink,
+                                  sample_player_, sample_player_if_);
+
+  if (res == SL_RESULT_SUCCESS) {
+    res = (*sample_player_)->GetInterface(sample_player_,
+                                          SL_IID_BUFFERQUEUE,
+                                          &sample_player_queue_);
+    if (res == SL_RESULT_SUCCESS) {
+      res = (*sample_player_if_)->SetPlayState(sample_player_if_,
+                                               SL_PLAYSTATE_PLAYING);
+      if (res == SL_RESULT_SUCCESS) {
+        return 0;
+      }
+    }
+  }
+  LOGE("Error while starting sample player");
+  return -1;
+}
+
+int32_t AndroidSoundHandler::PlaySample(const char* path) {
+  SLuint32 state;
+  (*sample_player_)->GetState(sample_player_, &state);
+  if (state != SL_OBJECT_STATE_REALIZED) {
+    LOGE("Sample player has not been realized");
+  } else {
+    Sample* sample = GetSample(path);
+    if (sample != NULL) {
+      int16_t* buffer = reinterpret_cast<int16_t*>(sample->buffer());
+      off_t len = sample->length();
+
+      // Remove any current sample.
+      int32_t res = (*sample_player_queue_)->Clear(sample_player_queue_);
+      if (res == SL_RESULT_SUCCESS) {
+        res = (*sample_player_queue_)->Enqueue(sample_player_queue_,
+                                               buffer, len);
+        if (res == SL_RESULT_SUCCESS) {
+          return 0;
+        }
+        LOGE("Enqueueing sample failed");
+      }
+    }
+  }
+  return -1;
+}
+
+