diff --git a/gst-sdk/tutorials/android-tutorial-4/AndroidManifest.xml b/gst-sdk/tutorials/android-tutorial-4/AndroidManifest.xml new file mode 100644 index 0000000000..f09dd03933 --- /dev/null +++ b/gst-sdk/tutorials/android-tutorial-4/AndroidManifest.xml @@ -0,0 +1,22 @@ + + + + + + + + + + + + + + + + diff --git a/gst-sdk/tutorials/android-tutorial-4/jni/Android.mk b/gst-sdk/tutorials/android-tutorial-4/jni/Android.mk new file mode 100644 index 0000000000..ea48c78cd2 --- /dev/null +++ b/gst-sdk/tutorials/android-tutorial-4/jni/Android.mk @@ -0,0 +1,20 @@ +LOCAL_PATH := $(call my-dir) + +include $(CLEAR_VARS) + +LOCAL_MODULE := tutorial-4 +LOCAL_SRC_FILES := tutorial-4.c +LOCAL_SHARED_LIBRARIES := gstreamer_android +LOCAL_LDLIBS := -llog -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/ +include $(GSTREAMER_NDK_BUILD_PATH)/plugins.mk +GSTREAMER_PLUGINS := $(GSTREAMER_PLUGINS_CORE) $(GSTREAMER_PLUGINS_CODECS) $(GSTREAMER_PLUGINS_SYS) $(GSTREAMER_PLUGINS_EFFECTS) +include $(GSTREAMER_NDK_BUILD_PATH)/gstreamer.mk diff --git a/gst-sdk/tutorials/android-tutorial-4/jni/tutorial-4.c b/gst-sdk/tutorials/android-tutorial-4/jni/tutorial-4.c new file mode 100644 index 0000000000..e739623c2a --- /dev/null +++ b/gst-sdk/tutorials/android-tutorial-4/jni/tutorial-4.c @@ -0,0 +1,337 @@ +#include +#include +#include +#include +#include +#include +#include +#include +#include + +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 + +/* Structure to contain all our information, so we can pass it to callbacks */ +typedef struct _CustomData { + jobject app; /* Application instance, used to call its methods. A global reference is kept. */ + GstElement *pipeline; /* The running pipeline */ + GMainContext *context; /* GLib context used to run the main loop */ + GMainLoop *main_loop; /* GLib main loop */ + gboolean initialized; /* To avoid informing the UI multiple times about the initialization */ + GstElement *video_sink; /* The video sink element which receives XOverlay commands */ + ANativeWindow *native_window; /* The Android native window where video will be rendered */ +} CustomData; + +/* These global variables cache values which are not changing during execution */ +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 on_gstreamer_initialized_method_id; + +/* + * Private methods + */ + +/* Register this thread with the VM */ +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; +} + +/* Unregister this thread from the VM */ +static void detach_current_thread (void *env) { + GST_DEBUG ("Detaching thread %p", g_thread_self ()); + (*java_vm)->DetachCurrentThread (java_vm); +} + +/* Retrieve the JNI environment for this thread */ +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; +} + +/* Change the content of the UI's TextView */ +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); +} + +/* Retrieve errors from the bus and show them on the UI */ +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); + gst_element_set_state (data->pipeline, GST_STATE_NULL); +} + +/* Notify UI about pipeline state changes */ +static void state_changed_cb (GstBus *bus, GstMessage *msg, CustomData *data) { + 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)) { + gchar *message = g_strdup_printf("State changed to %s", gst_element_state_get_name(new_state)); + set_ui_message(message, data); + g_free (message); + } +} + +/* Check if all conditions are met to report GStreamer as initialized. + * These conditions will change depending on the application */ +static void check_initialization_complete (CustomData *data) { + JNIEnv *env = get_jni_env (); + 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); + + /* The main loop is running and we received a native window, inform the sink about it */ + gst_x_overlay_set_window_handle (GST_X_OVERLAY (data->video_sink), (guintptr)data->native_window); + + (*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; + } +} + +/* Main method for the native code. This is executed on its own thread. */ +static void *app_function (void *userdata) { + JavaVMAttachArgs args; + GstBus *bus; + CustomData *data = (CustomData *)userdata; + GSource *bus_source; + GError *error = NULL; + + GST_DEBUG ("Creating pipeline in CustomData at %p", data); + + /* Create our own GLib Main Context and make it the default one */ + data->context = g_main_context_new (); + g_main_context_push_thread_default(data->context); + + /* Build pipeline */ + data->pipeline = gst_parse_launch("videotestsrc ! warptv ! ffmpegcolorspace ! autovideosink", &error); + if (error) { + gchar *message = g_strdup_printf("Unable to build pipeline: %s", error->message); + g_clear_error (&error); + set_ui_message(message, data); + g_free (message); + return NULL; + } + + /* Set the pipeline to READY, so it can already accept a window handle, if we have one */ + gst_element_set_state(data->pipeline, GST_STATE_READY); + + data->video_sink = gst_bin_get_by_interface(GST_BIN(data->pipeline), GST_TYPE_X_OVERLAY); + if (!data->video_sink) { + GST_ERROR ("Could not retrieve video sink"); + return NULL; + } + + /* 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::state-changed", (GCallback)state_changed_cb, data); + gst_object_unref (bus); + + /* 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_pop_thread_default(data->context); + g_main_context_unref (data->context); + gst_element_set_state (data->pipeline, GST_STATE_NULL); + gst_object_unref (data->video_sink); + gst_object_unref (data->pipeline); + + return NULL; +} + +/* + * Java Bindings + */ + +/* Instruct the native code to create its internal data structure, pipeline and thread */ +static void gst_native_init (JNIEnv* env, jobject thiz) { + CustomData *data = g_new0 (CustomData, 1); + SET_CUSTOM_DATA (env, thiz, custom_data_field_id, data); + GST_DEBUG_CATEGORY_INIT (debug_category, "tutorial-4", 0, "Android tutorial 4"); + gst_debug_set_threshold_for_name("tutorial-4", GST_LEVEL_DEBUG); + 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); +} + +/* Quit the main loop, remove the native thread and free resources */ +static 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"); +} + +/* Set pipeline to PLAYING state */ +static 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"); + gst_element_set_state (data->pipeline, GST_STATE_PLAYING); +} + +/* Set pipeline to PAUSED state */ +static 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"); + gst_element_set_state (data->pipeline, GST_STATE_PAUSED); +} + +/* Static class initializer: retrieve method and field IDs */ +static jboolean gst_native_class_init (JNIEnv* env, jclass klass) { + custom_data_field_id = (*env)->GetFieldID (env, klass, "native_custom_data", "J"); + set_message_method_id = (*env)->GetMethodID (env, klass, "setMessage", "(Ljava/lang/String;)V"); + on_gstreamer_initialized_method_id = (*env)->GetMethodID (env, klass, "onGStreamerInitialized", "()V"); + + if (!custom_data_field_id || !set_message_method_id || !on_gstreamer_initialized_method_id) { + /* We emit this message through the Android log instead of the GStreamer log because the later + * has not been initialized yet. + */ + __android_log_print (ANDROID_LOG_ERROR, "tutorial-4", "The calling class does not implement all necessary interface methods"); + return JNI_FALSE; + } + return JNI_TRUE; +} + +static 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; + ANativeWindow *new_native_window = ANativeWindow_fromSurface(env, surface); + GST_DEBUG ("Received surface %p (native window %p)", surface, new_native_window); + + if (data->native_window) { + ANativeWindow_release (data->native_window); + if (data->native_window == new_native_window) { + GST_DEBUG ("New native window is the same as the previous one", data->native_window); + if (data->video_sink) { + gst_x_overlay_expose(GST_X_OVERLAY (data->video_sink)); + gst_x_overlay_expose(GST_X_OVERLAY (data->video_sink)); + } + return; + } else { + GST_DEBUG ("Released previous native window %p", data->native_window); + data->initialized = FALSE; + } + } + data->native_window = new_native_window; + + check_initialization_complete (data); +} + +static void gst_native_surface_finalize (JNIEnv *env, jobject thiz) { + CustomData *data = GET_CUSTOM_DATA (env, thiz, custom_data_field_id); + if (!data) return; + GST_DEBUG ("Releasing Native Window %p", data->native_window); + + if (data->video_sink) { + gst_x_overlay_set_window_handle (GST_X_OVERLAY (data->video_sink), (guintptr)NULL); + gst_element_set_state (data->pipeline, GST_STATE_READY); + } + + ANativeWindow_release (data->native_window); + data->native_window = NULL; + data->initialized = FALSE; +} + +/* List of implemented native methods */ +static JNINativeMethod native_methods[] = { + { "nativeInit", "()V", (void *) gst_native_init}, + { "nativeFinalize", "()V", (void *) gst_native_finalize}, + { "nativePlay", "()V", (void *) gst_native_play}, + { "nativePause", "()V", (void *) gst_native_pause}, + { "nativeSurfaceInit", "(Ljava/lang/Object;)V", (void *) gst_native_surface_init}, + { "nativeSurfaceFinalize", "()V", (void *) gst_native_surface_finalize}, + { "nativeClassInit", "()Z", (void *) gst_native_class_init} +}; + +/* Library initializer */ +jint JNI_OnLoad(JavaVM *vm, void *reserved) { + JNIEnv *env = NULL; + + java_vm = vm; + + if ((*vm)->GetEnv(vm, (void**) &env, JNI_VERSION_1_4) != JNI_OK) { + __android_log_print (ANDROID_LOG_ERROR, "tutorial-4", "Could not retrieve JNIEnv"); + return 0; + } + jclass klass = (*env)->FindClass (env, "com/gst_sdk_tutorials/tutorial_4/Tutorial4"); + (*env)->RegisterNatives (env, klass, native_methods, G_N_ELEMENTS(native_methods)); + + pthread_key_create (¤t_jni_env, detach_current_thread); + + return JNI_VERSION_1_4; +} diff --git a/gst-sdk/tutorials/android-tutorial-4/res/drawable-hdpi/gst_sdk_icon.png b/gst-sdk/tutorials/android-tutorial-4/res/drawable-hdpi/gst_sdk_icon.png new file mode 100644 index 0000000000..783fbcd718 Binary files /dev/null and b/gst-sdk/tutorials/android-tutorial-4/res/drawable-hdpi/gst_sdk_icon.png differ diff --git a/gst-sdk/tutorials/android-tutorial-4/res/drawable-ldpi/gst_sdk_icon.png b/gst-sdk/tutorials/android-tutorial-4/res/drawable-ldpi/gst_sdk_icon.png new file mode 100644 index 0000000000..0ae8cc0aa9 Binary files /dev/null and b/gst-sdk/tutorials/android-tutorial-4/res/drawable-ldpi/gst_sdk_icon.png differ diff --git a/gst-sdk/tutorials/android-tutorial-4/res/drawable-mdpi/gst_sdk_icon.png b/gst-sdk/tutorials/android-tutorial-4/res/drawable-mdpi/gst_sdk_icon.png new file mode 100644 index 0000000000..fab0d324b4 Binary files /dev/null and b/gst-sdk/tutorials/android-tutorial-4/res/drawable-mdpi/gst_sdk_icon.png differ diff --git a/gst-sdk/tutorials/android-tutorial-4/res/drawable-xhdpi/gst_sdk_icon.png b/gst-sdk/tutorials/android-tutorial-4/res/drawable-xhdpi/gst_sdk_icon.png new file mode 100644 index 0000000000..24ea263e37 Binary files /dev/null and b/gst-sdk/tutorials/android-tutorial-4/res/drawable-xhdpi/gst_sdk_icon.png differ diff --git a/gst-sdk/tutorials/android-tutorial-4/res/layout/main.xml b/gst-sdk/tutorials/android-tutorial-4/res/layout/main.xml new file mode 100644 index 0000000000..c3baac85a6 --- /dev/null +++ b/gst-sdk/tutorials/android-tutorial-4/res/layout/main.xml @@ -0,0 +1,63 @@ + + + + + + + + + + + + + + + + + + + + + diff --git a/gst-sdk/tutorials/android-tutorial-4/res/values/strings.xml b/gst-sdk/tutorials/android-tutorial-4/res/values/strings.xml new file mode 100644 index 0000000000..99d0a0cb5d --- /dev/null +++ b/gst-sdk/tutorials/android-tutorial-4/res/values/strings.xml @@ -0,0 +1,18 @@ + + + Android tutorial 4 + Play + Stop + Select + Android tutorial 1 + Location + folder can\'t be read! + New + Select + File name: + Cancel + Save + No Data + #ffff0000 + Error + diff --git a/gst-sdk/tutorials/android-tutorial-4/src/com/gst_sdk_tutorials/tutorial_4/GStreamerSurfaceView.java b/gst-sdk/tutorials/android-tutorial-4/src/com/gst_sdk_tutorials/tutorial_4/GStreamerSurfaceView.java new file mode 100644 index 0000000000..c2cd2b2477 --- /dev/null +++ b/gst-sdk/tutorials/android-tutorial-4/src/com/gst_sdk_tutorials/tutorial_4/GStreamerSurfaceView.java @@ -0,0 +1,85 @@ +package com.gst_sdk_tutorials.tutorial_4; + +import android.content.Context; +import android.util.AttributeSet; +import android.util.Log; +import android.view.SurfaceView; +import android.view.View; + +// A simple SurfaceView whose width and height can be set from the outside +public class GStreamerSurfaceView extends SurfaceView { + public int media_width = 320; + public int media_height = 240; + + // Mandatory constructors, they do not do much + public GStreamerSurfaceView(Context context, AttributeSet attrs, + int defStyle) { + super(context, attrs, defStyle); + } + + public GStreamerSurfaceView(Context context, AttributeSet attrs) { + super(context, attrs); + } + + public GStreamerSurfaceView (Context context) { + super(context); + } + + // Called by the layout manager to find out our size and give us some rules. + // We will try to maximize our size, and preserve the media's aspect ratio if + // we are given the freedom to do so. + @Override + protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) { + int width = 0, height = 0; + int wmode = View.MeasureSpec.getMode(widthMeasureSpec); + int hmode = View.MeasureSpec.getMode(heightMeasureSpec); + int wsize = View.MeasureSpec.getSize(widthMeasureSpec); + int hsize = View.MeasureSpec.getSize(heightMeasureSpec); + + Log.i ("GStreamer", "onMeasure called with " + media_width + "x" + media_height); + // Obey width rules + switch (wmode) { + case View.MeasureSpec.AT_MOST: + if (hmode == View.MeasureSpec.EXACTLY) { + width = Math.min(hsize * media_width / media_height, wsize); + break; + } + case View.MeasureSpec.EXACTLY: + width = wsize; + break; + case View.MeasureSpec.UNSPECIFIED: + width = media_width; + } + + // Obey height rules + switch (hmode) { + case View.MeasureSpec.AT_MOST: + if (wmode == View.MeasureSpec.EXACTLY) { + height = Math.min(wsize * media_height / media_width, hsize); + break; + } + case View.MeasureSpec.EXACTLY: + height = hsize; + break; + case View.MeasureSpec.UNSPECIFIED: + height = media_height; + } + + // Finally, calculate best size when both axis are free + if (hmode == View.MeasureSpec.AT_MOST && wmode == View.MeasureSpec.AT_MOST) { + int correct_height = width * media_height / media_width; + int correct_width = height * media_width / media_height; + + if (correct_height < height) + height = correct_height; + else + width = correct_width; + } + + // Obey minimum size + width = Math.max (getSuggestedMinimumWidth(), width); + height = Math.max (getSuggestedMinimumHeight(), height); + setMeasuredDimension(width, height); + } + +} diff --git a/gst-sdk/tutorials/android-tutorial-4/src/com/gst_sdk_tutorials/tutorial_4/Tutorial4.java b/gst-sdk/tutorials/android-tutorial-4/src/com/gst_sdk_tutorials/tutorial_4/Tutorial4.java new file mode 100644 index 0000000000..edefde331f --- /dev/null +++ b/gst-sdk/tutorials/android-tutorial-4/src/com/gst_sdk_tutorials/tutorial_4/Tutorial4.java @@ -0,0 +1,143 @@ +package com.gst_sdk_tutorials.tutorial_4; + +import android.app.Activity; +import android.os.Bundle; +import android.util.Log; +import android.view.SurfaceHolder; +import android.view.SurfaceView; +import android.view.View; +import android.view.View.OnClickListener; +import android.widget.ImageButton; +import android.widget.TextView; +import android.widget.Toast; + +import com.gstreamer.GStreamer; + +public class Tutorial4 extends Activity implements SurfaceHolder.Callback { + private native void nativeInit(); // Initialize native code, build pipeline, etc + private native void nativeFinalize(); // Destroy pipeline and shutdown native code + private native void nativePlay(); // Set pipeline to PLAYING + private native void nativePause(); // Set pipeline to PAUSED + private static native boolean nativeClassInit(); // Initialize native class: cache Method IDs for callbacks + private native void nativeSurfaceInit(Object surface); + private native void nativeSurfaceFinalize(); + private long native_custom_data; // Native code will use this to keep private data + + private boolean is_playing_desired; // Whether the user asked to go to PLAYING + + // Called when the activity is first created. + @Override + public void onCreate(Bundle savedInstanceState) + { + super.onCreate(savedInstanceState); + + // Initialize GStreamer and warn if it fails + 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); + + if (savedInstanceState != null) { + is_playing_desired = savedInstanceState.getBoolean("playing"); + Log.i ("GStreamer", "Activity created. Saved state is playing:" + is_playing_desired); + } else { + is_playing_desired = false; + Log.i ("GStreamer", "Activity created. There is no saved state, playing: false"); + } + + // Start with disabled buttons, until native code is initialized + this.findViewById(R.id.button_play).setEnabled(false); + this.findViewById(R.id.button_stop).setEnabled(false); + + nativeInit(); + } + + protected void onSaveInstanceState (Bundle outState) { + Log.d ("GStreamer", "Saving state, playing:" + is_playing_desired); + outState.putBoolean("playing", is_playing_desired); + } + + protected void onDestroy() { + nativeFinalize(); + super.onDestroy(); + } + + // Called from native code. This sets the content of the TextView from the UI thread. + 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. Native code calls this once it has created its pipeline and + // the main loop is running, so it is ready to accept commands. + private void onGStreamerInitialized () { + Log.i ("GStreamer", "Gst initialized. Restoring state, playing:" + is_playing_desired); + // Restore previous playing state + if (is_playing_desired) { + nativePlay(); + } else { + nativePause(); + } + + // Re-enable buttons, now that GStreamer is initialized + final Activity activity = this; + runOnUiThread(new Runnable() { + public void run() { + activity.findViewById(R.id.button_play).setEnabled(true); + activity.findViewById(R.id.button_stop).setEnabled(true); + } + }); + } + + static { + System.loadLibrary("gstreamer_android"); + System.loadLibrary("tutorial-4"); + nativeClassInit(); + } + + 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 (); + } + +}