Merge branch 'android'

.gitignore

@@ -6,4 +6,12 @@ ipch
 *.sdf
 *.suo
 *.opensdf
-vs/2010/libs
+vs/2010/libs
+bin
+gen
+libs
+obj
+.classpath
+.project
+.settings
+.libs

gst-sdk/tutorials/android-tutorial-1/AndroidManifest.xml

@@ -0,0 +1,20 @@
+<?xml version="1.0" encoding="utf-8"?>
+<manifest xmlns:android="http://schemas.android.com/apk/res/android"
+      package="com.gst_sdk_tutorials.tutorial_1"
+      android:versionCode="1"
+      android:versionName="1.0">
+    <uses-sdk android:minSdkVersion="9" android:targetSdkVersion="14"/>
+    <uses-permission android:name="android.permission.INTERNET"/>
+    <uses-feature android:glEsVersion="0x00020000"/>
+    <application android:label="@string/app_name"
+                 android:debuggable="true"
+                 android:icon="@drawable/gst_sdk_icon">
+        <activity android:name=".Tutorial1"
+                  android:label="@string/app_name">
+            <intent-filter>
+                <action android:name="android.intent.action.MAIN" />
+                <category android:name="android.intent.category.LAUNCHER" />
+            </intent-filter>
+        </activity>
+    </application>
+</manifest> 

gst-sdk/tutorials/android-tutorial-1/jni/Android.mk

@@ -0,0 +1,34 @@
+# Copyright (C) 2009 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.
+#
+LOCAL_PATH := $(call my-dir)
+
+include $(CLEAR_VARS)
+
+LOCAL_MODULE    := tutorial-1
+LOCAL_SRC_FILES := tutorial-1.c
+LOCAL_SHARED_LIBRARIES := gstreamer_android
+LOCAL_LDLIBS := -landroid
+include $(BUILD_SHARED_LIBRARY)
+
+ifndef GSTREAMER_SDK_ROOT
+ifndef GSTREAMER_SDK_ROOT_ANDROID
+$(error GSTREAMER_SDK_ROOT_ANDROID is not defined!)
+endif
+GSTREAMER_SDK_ROOT        := $(GSTREAMER_SDK_ROOT_ANDROID)
+endif
+GSTREAMER_NDK_BUILD_PATH  := $(GSTREAMER_SDK_ROOT)/share/gst-android/ndk-build/
+GSTREAMER_PLUGINS         := coreelements ogg theora vorbis ffmpegcolorspace playback audioconvert audiorate audioresample coreindexers gio uridecodebin videorate videoscale typefindfunctions eglglessink soup amc matroska autodetect videofilter videotestsrc opensles volume
+G_IO_MODULES              := gnutls
+include $(GSTREAMER_NDK_BUILD_PATH)/gstreamer.mk

gst-sdk/tutorials/android-tutorial-1/jni/tutorial-1.c

@@ -0,0 +1,465 @@
+#include <string.h>
+#include <jni.h>
+#include <android/native_window.h>
+#include <android/native_window_jni.h>
+#include <gst/gst.h>
+#include <pthread.h>
+#include <gst/interfaces/xoverlay.h>
+
+GST_DEBUG_CATEGORY_STATIC (debug_category);
+#define GST_CAT_DEFAULT debug_category
+
+/*
+ * These macros provide a way to store the native pointer to CustomData, which might be 32 or 64 bits, into
+ * a jlong, which is always 64 bits, without warnings.
+ */
+#if GLIB_SIZEOF_VOID_P == 8
+# define GET_CUSTOM_DATA(env, thiz, fieldID) (CustomData *)(*env)->GetLongField (env, thiz, fieldID)
+# define SET_CUSTOM_DATA(env, thiz, fieldID, data) (*env)->SetLongField (env, thiz, fieldID, (jlong)data)
+#else
+# define GET_CUSTOM_DATA(env, thiz, fieldID) (CustomData *)(jint)(*env)->GetLongField (env, thiz, fieldID)
+# define SET_CUSTOM_DATA(env, thiz, fieldID, data) (*env)->SetLongField (env, thiz, fieldID, (jlong)(jint)data)
+#endif
+
+typedef struct _CustomData {
+  jobject app;
+  GstElement *pipeline;
+  GMainContext *context;
+  GMainLoop *main_loop;
+  ANativeWindow *native_window;
+  GstState state, target_state;
+  gint64 position;
+  gint64 duration;
+  gint64 desired_position;
+  GstClockTime last_seek_time;
+  gboolean initialized;
+  gboolean is_live;
+} CustomData;
+
+static pthread_t gst_app_thread;
+static pthread_key_t current_jni_env;
+static JavaVM *java_vm;
+static jfieldID custom_data_field_id;
+static jmethodID set_message_method_id;
+static jmethodID set_current_position_method_id;
+static jmethodID set_current_state_method_id;
+static jmethodID on_gstreamer_initialized_method_id;
+
+/*
+ * Private methods
+ */
+static JNIEnv *attach_current_thread (void) {
+  JNIEnv *env;
+  JavaVMAttachArgs args;
+
+  GST_DEBUG ("Attaching thread %p", g_thread_self ());
+  args.version = JNI_VERSION_1_4;
+  args.name = NULL;
+  args.group = NULL;
+
+  if ((*java_vm)->AttachCurrentThread (java_vm, &env, &args) < 0) {
+    GST_ERROR ("Failed to attach current thread");
+    return NULL;
+  }
+
+  return env;
+}
+
+static void detach_current_thread (void *env) {
+  GST_DEBUG ("Detaching thread %p", g_thread_self ());
+  (*java_vm)->DetachCurrentThread (java_vm);
+}
+
+static JNIEnv *get_jni_env (void) {
+  JNIEnv *env;
+
+  if ((env = pthread_getspecific (current_jni_env)) == NULL) {
+    env = attach_current_thread ();
+    pthread_setspecific (current_jni_env, env);
+  }
+
+  return env;
+}
+
+static void set_ui_message (const gchar *message, CustomData *data) {
+  JNIEnv *env = get_jni_env ();
+  GST_DEBUG ("Setting message to: %s", message);
+  jstring jmessage = (*env)->NewStringUTF(env, message);
+  (*env)->CallVoidMethod (env, data->app, set_message_method_id, jmessage);
+  if ((*env)->ExceptionCheck (env)) {
+    GST_ERROR ("Failed to call Java method");
+    (*env)->ExceptionClear (env);
+  }
+  (*env)->DeleteLocalRef (env, jmessage);
+}
+
+static void set_current_ui_position (gint position, gint duration, CustomData *data) {
+  JNIEnv *env = get_jni_env ();
+//  GST_DEBUG ("Setting current position/duration to: %d / %d (ms)", position, duration);
+  (*env)->CallVoidMethod (env, data->app, set_current_position_method_id, position, duration);
+  if ((*env)->ExceptionCheck (env)) {
+    GST_ERROR ("Failed to call Java method");
+    (*env)->ExceptionClear (env);
+  }
+}
+
+static gboolean refresh_ui (CustomData *data) {
+  GstFormat fmt = GST_FORMAT_TIME;
+  gint64 current = -1;
+
+  /* We do not want to update anything unless we have a working pipeline in the PAUSED or PLAYING state */
+  if (!data || !data->pipeline || data->state < GST_STATE_PAUSED)
+    return TRUE;
+
+  /* If we didn't know it yet, query the stream duration */
+  if (!GST_CLOCK_TIME_IS_VALID (data->duration)) {
+    if (!gst_element_query_duration (data->pipeline, &fmt, &data->duration)) {
+      GST_WARNING ("Could not query current duration");
+    }
+  }
+
+  if (gst_element_query_position (data->pipeline, &fmt, &data->position)) {
+    /* Java expects these values in milliseconds, and Gst provides nanoseconds */
+    set_current_ui_position (data->position / GST_MSECOND, data->duration / GST_MSECOND, data);
+  }
+  return TRUE;
+}
+
+static void execute_seek (gint64 desired_position, CustomData *data);
+static gboolean
+delayed_seek_cb (CustomData *data)
+{
+  GST_DEBUG ("Doing delayed seek %" GST_TIME_FORMAT, GST_TIME_ARGS (data->desired_position));
+  data->last_seek_time = GST_CLOCK_TIME_NONE;
+  execute_seek (data->desired_position, data);
+  return FALSE;
+}
+
+static void execute_seek (gint64 desired_position, CustomData *data) {
+  gboolean res;
+  gint64 diff;
+
+  if (desired_position == GST_CLOCK_TIME_NONE)
+    return;
+
+  diff = gst_util_get_timestamp () - data->last_seek_time;
+
+  if (GST_CLOCK_TIME_IS_VALID (data->last_seek_time) && diff < 500 * GST_MSECOND) {
+    GSource *timeout_source;
+    
+    if (!GST_CLOCK_TIME_IS_VALID (data->desired_position)) {
+      timeout_source = g_timeout_source_new (diff / GST_MSECOND);
+      g_source_attach (timeout_source, data->context);
+      g_source_set_callback (timeout_source, (GSourceFunc)delayed_seek_cb, data, NULL);
+      g_source_unref (timeout_source);
+    }
+    data->desired_position = desired_position;
+    GST_DEBUG ("Throttling seek to %" GST_TIME_FORMAT ", will be in %" GST_TIME_FORMAT,
+        GST_TIME_ARGS (desired_position), GST_TIME_ARGS (500 * GST_MSECOND - diff));
+  } else {
+    GST_DEBUG ("Setting position to %lld milliseconds", desired_position / GST_MSECOND);
+    res = gst_element_seek_simple (data->pipeline, GST_FORMAT_TIME, GST_SEEK_FLAG_FLUSH | GST_SEEK_FLAG_KEY_UNIT, desired_position);
+    data->last_seek_time = gst_util_get_timestamp ();
+    data->desired_position = GST_CLOCK_TIME_NONE;
+    GST_DEBUG ("Seek returned %d", res);
+  }
+}
+
+static void error_cb (GstBus *bus, GstMessage *msg, CustomData *data) {
+  GError *err;
+  gchar *debug_info;
+  gchar *message_string;
+
+  gst_message_parse_error (msg, &err, &debug_info);
+  message_string = g_strdup_printf ("Error received from element %s: %s", GST_OBJECT_NAME (msg->src), err->message);
+  g_clear_error (&err);
+  g_free (debug_info);
+  set_ui_message (message_string, data);
+  g_free (message_string);
+  data->target_state = GST_STATE_NULL;
+  gst_element_set_state (data->pipeline, GST_STATE_NULL);
+}
+
+static void eos_cb (GstBus *bus, GstMessage *msg, CustomData *data) {
+  set_ui_message (GST_MESSAGE_TYPE_NAME (msg), data);
+  refresh_ui (data);
+  data->target_state = GST_STATE_PAUSED;
+  data->is_live = (gst_element_set_state (data->pipeline, GST_STATE_PAUSED) == GST_STATE_CHANGE_NO_PREROLL);
+  execute_seek (0, data);
+}
+
+static void duration_cb (GstBus *bus, GstMessage *msg, CustomData *data) {
+  data->duration = GST_CLOCK_TIME_NONE;
+}
+
+static void buffering_cb (GstBus *bus, GstMessage *msg, CustomData *data) {
+  gint percent;
+
+  if (data->is_live)
+    return;
+
+  gst_message_parse_buffering (msg, &percent);
+  if (percent < 100 && data->target_state >= GST_STATE_PAUSED) {
+    gchar * message_string = g_strdup_printf ("Buffering %d %%", percent);
+    gst_element_set_state (data->pipeline, GST_STATE_PAUSED);
+    set_ui_message (message_string, data);
+    g_free (message_string);
+  } else if (data->target_state >= GST_STATE_PLAYING) {
+    gst_element_set_state (data->pipeline, GST_STATE_PLAYING);
+    set_ui_message ("PLAYING", data);
+  } else if (data->target_state >= GST_STATE_PAUSED) {
+    set_ui_message ("PAUSED", data);
+  }
+}
+
+static void clock_lost_cb (GstBus *bus, GstMessage *msg, CustomData *data) {
+  if (data->target_state >= GST_STATE_PLAYING) {
+    gst_element_set_state (data->pipeline, GST_STATE_PAUSED);
+    gst_element_set_state (data->pipeline, GST_STATE_PLAYING);
+  }
+}
+
+static void state_changed_cb (GstBus *bus, GstMessage *msg, CustomData *data) {
+  JNIEnv *env = get_jni_env ();
+  GstState old_state, new_state, pending_state;
+  gst_message_parse_state_changed (msg, &old_state, &new_state, &pending_state);
+  /* Only pay attention to messages coming from the pipeline, not its children */
+  if (GST_MESSAGE_SRC (msg) == GST_OBJECT (data->pipeline)) {
+    data->state = new_state;
+    if (data->state >= GST_STATE_PAUSED && GST_CLOCK_TIME_IS_VALID (data->desired_position))
+      execute_seek (data->desired_position, data);
+    GST_DEBUG ("State changed to %s, notifying application", gst_element_state_get_name(new_state));
+    (*env)->CallVoidMethod (env, data->app, set_current_state_method_id, new_state);
+    if ((*env)->ExceptionCheck (env)) {
+      GST_ERROR ("Failed to call Java method");
+      (*env)->ExceptionClear (env);
+    }
+  }
+}
+
+static void check_initialization_complete (CustomData *data) {
+  JNIEnv *env = get_jni_env ();
+  /* Check if all conditions are met to report GStreamer as initialized.
+   * These conditions will change depending on the application */
+  if (!data->initialized && data->native_window && data->main_loop) {
+    GST_DEBUG ("Initialization complete, notifying application. native_window:%p main_loop:%p", data->native_window,data->main_loop);
+    (*env)->CallVoidMethod (env, data->app, on_gstreamer_initialized_method_id);
+    if ((*env)->ExceptionCheck (env)) {
+      GST_ERROR ("Failed to call Java method");
+      (*env)->ExceptionClear (env);
+    }
+    data->initialized = TRUE;
+  }
+}
+
+static void *app_function (void *userdata) {
+  JavaVMAttachArgs args;
+  GstBus *bus;
+  GstMessage *msg;
+  CustomData *data = (CustomData *)userdata;
+  GSource *timeout_source;
+  GSource *bus_source;
+
+  GST_DEBUG ("Creating pipeline in CustomData at %p", data);
+
+  /* create our own GLib Main Context, so we do not interfere with other libraries using GLib */
+  data->context = g_main_context_new ();
+
+  data->pipeline = gst_element_factory_make ("playbin2", NULL);
+
+  if (data->native_window) {
+    GST_DEBUG ("Native window already received, notifying the pipeline about it.");
+    gst_x_overlay_set_window_handle (GST_X_OVERLAY (data->pipeline), (guintptr)data->native_window);
+  }
+
+  /* Instruct the bus to emit signals for each received message, and connect to the interesting signals */
+  bus = gst_element_get_bus (data->pipeline);
+  bus_source = gst_bus_create_watch (bus);
+  g_source_set_callback (bus_source, (GSourceFunc) gst_bus_async_signal_func, NULL, NULL);
+  g_source_attach (bus_source, data->context);
+  g_source_unref (bus_source);
+  g_signal_connect (G_OBJECT (bus), "message::error", (GCallback)error_cb, data);
+  g_signal_connect (G_OBJECT (bus), "message::eos", (GCallback)eos_cb, data);
+  g_signal_connect (G_OBJECT (bus), "message::state-changed", (GCallback)state_changed_cb, data);
+  g_signal_connect (G_OBJECT (bus), "message::duration", (GCallback)duration_cb, data);
+  g_signal_connect (G_OBJECT (bus), "message::buffering", (GCallback)buffering_cb, data);
+  g_signal_connect (G_OBJECT (bus), "message::clock-lost", (GCallback)clock_lost_cb, data);
+  gst_object_unref (bus);
+
+  /* Register a function that GLib will call 4 times per second */
+  timeout_source = g_timeout_source_new (250);
+  g_source_attach (timeout_source, data->context);
+  g_source_set_callback (timeout_source, (GSourceFunc)refresh_ui, data, NULL);
+  g_source_unref (timeout_source);
+
+  /* Create a GLib Main Loop and set it to run */
+  GST_DEBUG ("Entering main loop... (CustomData:%p)", data);
+  data->main_loop = g_main_loop_new (data->context, FALSE);
+  check_initialization_complete (data);
+  g_main_loop_run (data->main_loop);
+  GST_DEBUG ("Exited main loop");
+  g_main_loop_unref (data->main_loop);
+  data->main_loop = NULL;
+
+  /* Free resources */
+  g_main_context_unref (data->context);
+  data->target_state = GST_STATE_NULL;
+  gst_element_set_state (data->pipeline, GST_STATE_NULL);
+  gst_object_unref (data->pipeline);
+
+  return NULL;
+}
+
+/*
+ * Java Bindings
+ */
+void gst_native_init (JNIEnv* env, jobject thiz) {
+  CustomData *data = g_new0 (CustomData, 1);
+  data->duration = GST_CLOCK_TIME_NONE;
+  data->desired_position = GST_CLOCK_TIME_NONE;
+  data->last_seek_time = GST_CLOCK_TIME_NONE;
+  SET_CUSTOM_DATA (env, thiz, custom_data_field_id, data);
+  GST_DEBUG ("Created CustomData at %p", data);
+  data->app = (*env)->NewGlobalRef (env, thiz);
+  GST_DEBUG ("Created GlobalRef for app object at %p", data->app);
+  pthread_create (&gst_app_thread, NULL, &app_function, data);
+}
+
+void gst_native_finalize (JNIEnv* env, jobject thiz) {
+  CustomData *data = GET_CUSTOM_DATA (env, thiz, custom_data_field_id);
+  if (!data) return;
+  GST_DEBUG ("Quitting main loop...");
+  g_main_loop_quit (data->main_loop);
+  GST_DEBUG ("Waiting for thread to finish...");
+  pthread_join (gst_app_thread, NULL);
+  GST_DEBUG ("Deleting GlobalRef for app object at %p", data->app);
+  (*env)->DeleteGlobalRef (env, data->app);
+  GST_DEBUG ("Freeing CustomData at %p", data);
+  g_free (data);
+  SET_CUSTOM_DATA (env, thiz, custom_data_field_id, NULL);
+  GST_DEBUG ("Done finalizing");
+}
+
+void gst_native_set_uri (JNIEnv* env, jobject thiz, jstring uri) {
+  CustomData *data = GET_CUSTOM_DATA (env, thiz, custom_data_field_id);
+  if (!data) return;
+  const jbyte *char_uri = (*env)->GetStringUTFChars (env, uri, NULL);
+  GST_DEBUG ("Setting URI to %s", char_uri);
+  g_object_set(data->pipeline, "uri", char_uri);
+  (*env)->ReleaseStringUTFChars (env, uri, char_uri);
+}
+
+void gst_native_play (JNIEnv* env, jobject thiz) {
+  CustomData *data = GET_CUSTOM_DATA (env, thiz, custom_data_field_id);
+  if (!data) return;
+  GST_DEBUG ("Setting state to PLAYING");
+  data->target_state = GST_STATE_PLAYING;
+  data->is_live = (gst_element_set_state (data->pipeline, GST_STATE_PLAYING) == GST_STATE_CHANGE_NO_PREROLL);
+}
+
+void gst_native_pause (JNIEnv* env, jobject thiz) {
+  CustomData *data = GET_CUSTOM_DATA (env, thiz, custom_data_field_id);
+  if (!data) return;
+  GST_DEBUG ("Setting state to PAUSED");
+  data->target_state = GST_STATE_PAUSED;
+  data->is_live = (gst_element_set_state (data->pipeline, GST_STATE_PAUSED) == GST_STATE_CHANGE_NO_PREROLL);
+}
+
+void gst_native_set_position (JNIEnv* env, jobject thiz, int milliseconds) {
+  CustomData *data = GET_CUSTOM_DATA (env, thiz, custom_data_field_id);
+  if (!data) return;
+  gint64 desired_position = (gint64)(milliseconds * GST_MSECOND);
+  if (data->state == GST_STATE_PLAYING || data->state == GST_STATE_PAUSED) {
+    execute_seek(desired_position, data);
+  } else {
+    GST_DEBUG ("Scheduling seek to %d milliseconds for later", milliseconds);
+    data->desired_position = desired_position;
+  }
+}
+
+jboolean gst_class_init (JNIEnv* env, jclass klass) {
+  custom_data_field_id = (*env)->GetFieldID (env, klass, "native_custom_data", "J");
+  GST_DEBUG ("The FieldID for the native_custom_data field is %p", custom_data_field_id);
+  set_message_method_id = (*env)->GetMethodID (env, klass, "setMessage", "(Ljava/lang/String;)V");
+  GST_DEBUG ("The MethodID for the setMessage method is %p", set_message_method_id);
+  set_current_position_method_id = (*env)->GetMethodID (env, klass, "setCurrentPosition", "(II)V");
+  GST_DEBUG ("The MethodID for the setCurrentPosition method is %p", set_current_position_method_id);
+  on_gstreamer_initialized_method_id = (*env)->GetMethodID (env, klass, "onGStreamerInitialized", "()V");
+  GST_DEBUG ("The MethodID for the onGStreamerInitialized method is %p", on_gstreamer_initialized_method_id);
+  set_current_state_method_id = (*env)->GetMethodID (env, klass, "setCurrentState", "(I)V");
+  GST_DEBUG ("The MethodID for the setCurrentState method is %p", set_current_state_method_id);
+
+  if (!custom_data_field_id || !set_message_method_id || !set_current_position_method_id ||
+      !on_gstreamer_initialized_method_id || !set_current_state_method_id) {
+    GST_ERROR ("The calling class does not implement all necessary interface methods");
+    return JNI_FALSE;
+  }
+  return JNI_TRUE;
+}
+
+void gst_native_surface_init (JNIEnv *env, jobject thiz, jobject surface) {
+  CustomData *data = GET_CUSTOM_DATA (env, thiz, custom_data_field_id);
+  if (!data) return;
+  GST_DEBUG ("Received surface %p", surface);
+  if (data->native_window) {
+    GST_DEBUG ("Releasing previous native window %p", data->native_window);
+    ANativeWindow_release (data->native_window);
+  }
+  data->native_window = ANativeWindow_fromSurface(env, surface);
+  GST_DEBUG ("Got Native Window %p", data->native_window);
+
+  if (data->pipeline) {
+    GST_DEBUG ("Pipeline already created, notifying the it about the native window.");
+    gst_x_overlay_set_window_handle (GST_X_OVERLAY (data->pipeline), (guintptr)data->native_window);
+  } else {
+    GST_DEBUG ("Pipeline not created yet, it will later be notified about the native window.");
+  }
+
+  check_initialization_complete (data);
+}
+
+void gst_native_surface_finalize (JNIEnv *env, jobject thiz) {
+  CustomData *data = GET_CUSTOM_DATA (env, thiz, custom_data_field_id);
+  if (!data) {
+    GST_WARNING ("Received surface finalize but there is no CustomData. Ignoring.");
+    return;
+  }
+  GST_DEBUG ("Releasing Native Window %p", data->native_window);
+  ANativeWindow_release (data->native_window);
+  data->native_window = NULL;
+
+  if (data->pipeline) {
+    gst_x_overlay_set_window_handle (GST_X_OVERLAY (data->pipeline), (guintptr)NULL);
+  }
+}
+
+static JNINativeMethod native_methods[] = {
+  { "nativeInit", "()V", (void *) gst_native_init},
+  { "nativeFinalize", "()V", (void *) gst_native_finalize},
+  { "nativeSetUri", "(Ljava/lang/String;)V", (void *) gst_native_set_uri},
+  { "nativePlay", "()V", (void *) gst_native_play},
+  { "nativePause", "()V", (void *) gst_native_pause},
+  { "nativeSetPosition", "(I)V", (void*) gst_native_set_position},
+  { "classInit", "()Z", (void *) gst_class_init},
+  { "nativeSurfaceInit", "(Ljava/lang/Object;)V", (void *) gst_native_surface_init},
+  { "nativeSurfaceFinalize", "()V", (void *) gst_native_surface_finalize}
+};
+
+jint JNI_OnLoad(JavaVM *vm, void *reserved) {
+  JNIEnv *env = NULL;
+
+  GST_DEBUG_CATEGORY_INIT (debug_category, "tutorial-1", 0, "Android tutorial 1");
+
+  java_vm = vm;
+
+  if ((*vm)->GetEnv(vm, (void**) &env, JNI_VERSION_1_4) != JNI_OK) {
+    GST_ERROR ("Could not retrieve JNIEnv");
+    return 0;
+  }
+  jclass klass = (*env)->FindClass (env, "com/gst_sdk_tutorials/tutorial_1/Tutorial1");
+  (*env)->RegisterNatives (env, klass, native_methods, G_N_ELEMENTS(native_methods));
+
+  pthread_key_create (&current_jni_env, detach_current_thread);
+
+  return JNI_VERSION_1_4;
+}

gst-sdk/tutorials/android-tutorial-1/res/layout/main.xml

@@ -0,0 +1,55 @@
+<?xml version="1.0" encoding="utf-8"?>
+<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
+    android:layout_width="match_parent"
+    android:layout_height="match_parent"
+    android:orientation="vertical" >
+
+    <TextView
+        android:id="@+id/textview_message"
+        android:layout_width="match_parent"
+        android:layout_height="wrap_content" />
+
+    <LinearLayout
+        android:layout_width="match_parent"
+        android:layout_height="wrap_content"
+        android:orientation="horizontal" >
+
+        <ImageButton
+            android:id="@+id/button_play"
+            android:layout_width="wrap_content"
+            android:layout_height="wrap_content"
+            android:contentDescription="@string/button_play"
+            android:src="@android:drawable/ic_media_play"
+            android:text="@string/button_play" />
+
+        <ImageButton
+            android:id="@+id/button_stop"
+            android:layout_width="wrap_content"
+            android:layout_height="wrap_content"
+            android:contentDescription="@string/button_stop"
+            android:src="@android:drawable/ic_media_pause"
+            android:text="@string/button_stop" />
+
+        <TextView
+            android:id="@+id/textview_time"
+            android:layout_width="wrap_content"
+            android:layout_height="wrap_content"
+            android:layout_gravity="center_vertical"
+            android:layout_marginLeft="5dip"
+            android:layout_marginRight="5dip" />
+
+        <SeekBar
+            android:id="@+id/seek_bar"
+            android:layout_width="0dip"
+            android:layout_height="wrap_content"
+            android:layout_gravity="center_vertical"
+            android:layout_weight="1"
+            android:indeterminate="false" />
+    </LinearLayout>
+
+    <SurfaceView
+        android:id="@+id/surface_video"
+        android:layout_width="wrap_content"
+        android:layout_height="wrap_content" />
+
+</LinearLayout>

gst-sdk/tutorials/android-tutorial-1/res/values/strings.xml

@@ -0,0 +1,6 @@
+<?xml version="1.0" encoding="utf-8"?>
+<resources>
+    <string name="app_name">Android tutorial 1</string>
+    <string name="button_play">Play</string>
+    <string name="button_stop">Stop</string>
+</resources>

gst-sdk/tutorials/android-tutorial-1/src/com/gst_sdk_tutorials/tutorial_1/Tutorial1.java

@@ -0,0 +1,247 @@
+/*
+ * Copyright (C) 2009 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.
+ */
+package com.gst_sdk_tutorials.tutorial_1;
+
+import java.text.SimpleDateFormat;
+import java.util.Date;
+import java.util.TimeZone;
+
+import com.gst_sdk.GStreamer;
+
+import android.app.Activity;
+import android.util.Log;
+import android.os.Bundle;
+import android.view.SurfaceHolder;
+import android.view.SurfaceView;
+import android.view.View;
+import android.view.View.OnClickListener;
+import android.widget.ImageButton;
+import android.widget.SeekBar;
+import android.widget.SeekBar.OnSeekBarChangeListener;
+import android.widget.TextView;
+import android.widget.Toast;
+
+public class Tutorial1 extends Activity implements SurfaceHolder.Callback, OnSeekBarChangeListener {
+    private native void nativeInit();
+    private native void nativeFinalize();
+    private native void nativeSetUri(String uri);
+    private native void nativePlay();
+    private native void nativePause();
+    private native void nativeSetPosition(int milliseconds);
+    private static native boolean classInit();
+    private native void nativeSurfaceInit(Object surface);
+    private native void nativeSurfaceFinalize();
+    private long native_custom_data;
+
+    private boolean is_playing_desired;
+    private int position;
+    private int duration;
+    private boolean is_local_media;
+    private int desired_position;
+
+    private Bundle initialization_data;
+    
+    private final String mediaUri = "http://docs.gstreamer.com/media/sintel_trailer-480p.ogv";
+
+    /* Called when the activity is first created. 
+    @Override */
+    public void onCreate(Bundle savedInstanceState)
+    {
+        super.onCreate(savedInstanceState);
+
+        try {
+        GStreamer.init(this);
+        } catch (Exception e) {
+            Toast.makeText(this, e.getMessage(), Toast.LENGTH_LONG).show();
+            finish(); 
+            return;
+        }
+
+        setContentView(R.layout.main);
+
+        ImageButton play = (ImageButton) this.findViewById(R.id.button_play);
+        play.setOnClickListener(new OnClickListener() {
+            public void onClick(View v) {
+                is_playing_desired = true;
+                nativePlay();
+            }
+        });
+
+        ImageButton pause = (ImageButton) this.findViewById(R.id.button_stop);
+        pause.setOnClickListener(new OnClickListener() {
+            public void onClick(View v) {
+                is_playing_desired = false;
+                nativePause();
+            }
+        });
+
+        SurfaceView sv = (SurfaceView) this.findViewById(R.id.surface_video);
+        SurfaceHolder sh = sv.getHolder();
+        sh.addCallback(this);
+
+        SeekBar sb = (SeekBar) this.findViewById(R.id.seek_bar);
+        sb.setOnSeekBarChangeListener(this);
+
+        initialization_data = savedInstanceState;
+        
+        is_local_media = false;
+        is_playing_desired = false;
+
+        nativeInit();
+    }
+    
+    protected void onSaveInstanceState (Bundle outState) {
+        Log.d ("GStreamer", "Saving state, playing:" + is_playing_desired + " position:" + position);
+        outState.putBoolean("playing", is_playing_desired);
+        outState.putInt("position", position);
+        outState.putInt("duration", duration);
+    }
+
+    protected void onDestroy() {
+        nativeFinalize();
+        super.onDestroy();
+    }
+
+    /* Called from native code */
+    private void setMessage(final String message) {
+        final TextView tv = (TextView) this.findViewById(R.id.textview_message);
+        runOnUiThread (new Runnable() {
+          public void run() {
+            tv.setText(message);
+          }
+        });
+    }
+
+    /* Called from native code */
+    private void onGStreamerInitialized () {
+        nativeSetUri (mediaUri);
+        if (mediaUri.startsWith("file://")) is_local_media = true;
+
+        if (initialization_data != null) {
+            is_playing_desired = initialization_data.getBoolean("playing");
+            int milliseconds = initialization_data.getInt("position");
+            Log.i ("GStreamer", "Restoring state, playing:" + is_playing_desired + " position:" + milliseconds + " ms.");
+            /* Actually, move to one millisecond in the future. Otherwise, due to rounding errors between the
+             * milliseconds used here and the nanoseconds used by GStreamer, we would be jumping a bit behind
+             * where we were before. This, combined with seeking to keyframe positions, would skip one keyframe
+             * backwards on each iteration.
+             */
+            nativeSetPosition(milliseconds + 1);
+            if (is_playing_desired) {
+                nativePlay();
+            } else {
+                nativePause();
+            }
+        } else {
+            nativePause();
+        }
+    }
+
+    /* The text widget acts as an slave for the seek bar, so it reflects what the seek bar shows, whether
+     * it is an actual pipeline position or the position the user is currently dragging to.
+     */
+    private void updateTimeWidget () {
+        final TextView tv = (TextView) this.findViewById(R.id.textview_time);
+        final SeekBar sb = (SeekBar) this.findViewById(R.id.seek_bar);
+        final int pos = sb.getProgress();
+
+        SimpleDateFormat df = new SimpleDateFormat("HH:mm:ss");
+        df.setTimeZone(TimeZone.getTimeZone("UTC"));
+        final String message = df.format(new Date (pos)) + " / " + df.format(new Date (duration));
+        tv.setText(message);        
+    }
+
+    /* Called from native code */
+    private void setCurrentPosition(final int position, final int duration) {
+        final SeekBar sb = (SeekBar) this.findViewById(R.id.seek_bar);
+        
+        /* Ignore position messages from the pipeline if the seek bar is being dragged */
+        if (sb.isPressed()) return;
+
+        runOnUiThread (new Runnable() {
+          public void run() {
+            sb.setMax(duration);
+            sb.setProgress(position);
+            updateTimeWidget();
+          }
+        });
+        this.position = position;
+        this.duration = duration;
+    }
+
+    /* Called from native code */
+    private void setCurrentState (int state) {
+        Log.d ("GStreamer", "State has changed to " + state);
+        switch (state) {
+        case 1:
+            setMessage ("NULL");
+            break;
+        case 2:
+            setMessage ("READY");
+            break;
+        case 3:
+            setMessage ("PAUSED");
+            break;
+        case 4:
+            setMessage ("PLAYING");
+            break;
+        }
+    }
+
+    static {
+        System.loadLibrary("gstreamer_android");
+        System.loadLibrary("tutorial-1");
+        classInit();
+    }
+
+    public void surfaceChanged(SurfaceHolder holder, int format, int width,
+            int height) {
+        Log.d("GStreamer", "Surface changed to format " + format + " width "
+                + width + " height " + height);
+        nativeSurfaceInit (holder.getSurface());
+    }
+
+    public void surfaceCreated(SurfaceHolder holder) {
+        Log.d("GStreamer", "Surface created: " + holder.getSurface());
+    }
+
+    public void surfaceDestroyed(SurfaceHolder holder) {
+        Log.d("GStreamer", "Surface destroyed");
+        nativeSurfaceFinalize ();
+    }
+
+    public void onProgressChanged(SeekBar sb, int progress, boolean fromUser) {
+        if (fromUser == false) return;
+        desired_position = progress;
+        /* If this is a local file, allow scrub seeking, this is, seek soon as the slider
+         * is moved.
+         */
+        if (is_local_media) nativeSetPosition(desired_position);
+        updateTimeWidget();
+    }
+
+    public void onStartTrackingTouch(SeekBar sb) {
+        nativePause();
+    }
+
+    public void onStopTrackingTouch(SeekBar sb) {
+        /* If this is a remote file, scrub seeking is probably not going to work smoothly enough.
+         * Therefore, perform only the seek when the slider is released.
+         */
+        if (!is_local_media) nativeSetPosition(desired_position);
+        if (is_playing_desired) nativePlay();
+    }
+}