-#include <string.h>\r
-#include <stdint.h>\r
-#include <jni.h>\r
-#include <android/log.h>\r
-#include <android/native_window.h>\r
-#include <android/native_window_jni.h>\r
-#include <gst/gst.h>\r
-#include <gst/video/video.h>\r
-#include <pthread.h>\r
-\r
-GST_DEBUG_CATEGORY_STATIC (debug_category);\r
-#define GST_CAT_DEFAULT debug_category\r
-\r
-/*\r
- * These macros provide a way to store the native pointer to CustomData, which might be 32 or 64 bits, into\r
- * a jlong, which is always 64 bits, without warnings.\r
- */\r
-#if GLIB_SIZEOF_VOID_P == 8\r
-# define GET_CUSTOM_DATA(env, thiz, fieldID) (CustomData *)(*env)->GetLongField (env, thiz, fieldID)\r
-# define SET_CUSTOM_DATA(env, thiz, fieldID, data) (*env)->SetLongField (env, thiz, fieldID, (jlong)data)\r
-#else\r
-# define GET_CUSTOM_DATA(env, thiz, fieldID) (CustomData *)(jint)(*env)->GetLongField (env, thiz, fieldID)\r
-# define SET_CUSTOM_DATA(env, thiz, fieldID, data) (*env)->SetLongField (env, thiz, fieldID, (jlong)(jint)data)\r
-#endif\r
-\r
-/* Do not allow seeks to be performed closer than this distance. It is visually useless, and will probably\r
- * confuse some demuxers. */\r
-#define SEEK_MIN_DELAY (500 * GST_MSECOND)\r
-\r
-/* Structure to contain all our information, so we can pass it to callbacks */\r
-typedef struct _CustomData {\r
- jobject app; /* Application instance, used to call its methods. A global reference is kept. */\r
- GstElement *pipeline; /* The running pipeline */\r
- GMainContext *context; /* GLib context used to run the main loop */\r
- GMainLoop *main_loop; /* GLib main loop */\r
- gboolean initialized; /* To avoid informing the UI multiple times about the initialization */\r
- ANativeWindow *native_window; /* The Android native window where video will be rendered */\r
- GstState state; /* Current pipeline state */\r
- GstState target_state; /* Desired pipeline state, to be set once buffering is complete */\r
- gint64 duration; /* Cached clip duration */\r
- gint64 desired_position; /* Position to seek to, once the pipeline is running */\r
- GstClockTime last_seek_time; /* For seeking overflow prevention (throttling) */\r
- gboolean is_live; /* Live streams do not use buffering */\r
-} CustomData;\r
-\r
-/* playbin flags */\r
-typedef enum {\r
- GST_PLAY_FLAG_TEXT = (1 << 2) /* We want subtitle output */\r
-} GstPlayFlags;\r
-\r
-/* These global variables cache values which are not changing during execution */\r
-static pthread_t gst_app_thread;\r
-static pthread_key_t current_jni_env;\r
-static JavaVM *java_vm;\r
-static jfieldID custom_data_field_id;\r
-static jmethodID set_message_method_id;\r
-static jmethodID set_current_position_method_id;\r
-static jmethodID on_gstreamer_initialized_method_id;\r
-static jmethodID on_media_size_changed_method_id;\r
-\r
-/*\r
- * Private methods\r
- */\r
-\r
-/* Register this thread with the VM */\r
-static JNIEnv *attach_current_thread (void) {\r
- JNIEnv *env;\r
- JavaVMAttachArgs args;\r
-\r
- GST_DEBUG ("Attaching thread %p", g_thread_self ());\r
- args.version = JNI_VERSION_1_4;\r
- args.name = NULL;\r
- args.group = NULL;\r
-\r
- if ((*java_vm)->AttachCurrentThread (java_vm, &env, &args) < 0) {\r
- GST_ERROR ("Failed to attach current thread");\r
- return NULL;\r
- }\r
-\r
- return env;\r
-}\r
-\r
-/* Unregister this thread from the VM */\r
-static void detach_current_thread (void *env) {\r
- GST_DEBUG ("Detaching thread %p", g_thread_self ());\r
- (*java_vm)->DetachCurrentThread (java_vm);\r
-}\r
-\r
-/* Retrieve the JNI environment for this thread */\r
-static JNIEnv *get_jni_env (void) {\r
- JNIEnv *env;\r
-\r
- if ((env = pthread_getspecific (current_jni_env)) == NULL) {\r
- env = attach_current_thread ();\r
- pthread_setspecific (current_jni_env, env);\r
- }\r
-\r
- return env;\r
-}\r
-\r
-/* Change the content of the UI's TextView */\r
-static void set_ui_message (const gchar *message, CustomData *data) {\r
- JNIEnv *env = get_jni_env ();\r
- GST_DEBUG ("Setting message to: %s", message);\r
- jstring jmessage = (*env)->NewStringUTF(env, message);\r
- (*env)->CallVoidMethod (env, data->app, set_message_method_id, jmessage);\r
- if ((*env)->ExceptionCheck (env)) {\r
- GST_ERROR ("Failed to call Java method");\r
- (*env)->ExceptionClear (env);\r
- }\r
- (*env)->DeleteLocalRef (env, jmessage);\r
-}\r
-\r
-/* Tell the application what is the current position and clip duration */\r
-static void set_current_ui_position (gint position, gint duration, CustomData *data) {\r
- JNIEnv *env = get_jni_env ();\r
- (*env)->CallVoidMethod (env, data->app, set_current_position_method_id, position, duration);\r
- if ((*env)->ExceptionCheck (env)) {\r
- GST_ERROR ("Failed to call Java method");\r
- (*env)->ExceptionClear (env);\r
- }\r
-}\r
-\r
-/* If we have pipeline and it is running, query the current position and clip duration and inform\r
- * the application */\r
-static gboolean refresh_ui (CustomData *data) {\r
- gint64 current = -1;\r
- gint64 position;\r
-\r
- /* We do not want to update anything unless we have a working pipeline in the PAUSED or PLAYING state */\r
- if (!data || !data->pipeline || data->state < GST_STATE_PAUSED)\r
- return TRUE;\r
-\r
- /* If we didn't know it yet, query the stream duration */\r
- if (!GST_CLOCK_TIME_IS_VALID (data->duration)) {\r
- if (!gst_element_query_duration (data->pipeline, GST_FORMAT_TIME, &data->duration)) {\r
- GST_WARNING ("Could not query current duration");\r
- }\r
- }\r
-\r
- if (gst_element_query_position (data->pipeline, GST_FORMAT_TIME, &position)) {\r
- /* Java expects these values in milliseconds, and GStreamer provides nanoseconds */\r
- set_current_ui_position (position / GST_MSECOND, data->duration / GST_MSECOND, data);\r
- }\r
- return TRUE;\r
-}\r
-\r
-/* Forward declaration for the delayed seek callback */\r
-static gboolean delayed_seek_cb (CustomData *data);\r
-\r
-/* Perform seek, if we are not too close to the previous seek. Otherwise, schedule the seek for\r
- * some time in the future. */\r
-static void execute_seek (gint64 desired_position, CustomData *data) {\r
- gint64 diff;\r
-\r
- if (desired_position == GST_CLOCK_TIME_NONE)\r
- return;\r
-\r
- diff = gst_util_get_timestamp () - data->last_seek_time;\r
-\r
- if (GST_CLOCK_TIME_IS_VALID (data->last_seek_time) && diff < SEEK_MIN_DELAY) {\r
- /* The previous seek was too close, delay this one */\r
- GSource *timeout_source;\r
-\r
- if (data->desired_position == GST_CLOCK_TIME_NONE) {\r
- /* There was no previous seek scheduled. Setup a timer for some time in the future */\r
- timeout_source = g_timeout_source_new ((SEEK_MIN_DELAY - diff) / GST_MSECOND);\r
- g_source_set_callback (timeout_source, (GSourceFunc)delayed_seek_cb, data, NULL);\r
- g_source_attach (timeout_source, data->context);\r
- g_source_unref (timeout_source);\r
- }\r
- /* Update the desired seek position. If multiple requests are received before it is time\r
- * to perform a seek, only the last one is remembered. */\r
- data->desired_position = desired_position;\r
- GST_DEBUG ("Throttling seek to %" GST_TIME_FORMAT ", will be in %" GST_TIME_FORMAT,\r
- GST_TIME_ARGS (desired_position), GST_TIME_ARGS (SEEK_MIN_DELAY - diff));\r
- } else {\r
- /* Perform the seek now */\r
- GST_DEBUG ("Seeking to %" GST_TIME_FORMAT, GST_TIME_ARGS (desired_position));\r
- data->last_seek_time = gst_util_get_timestamp ();\r
- gst_element_seek_simple (data->pipeline, GST_FORMAT_TIME, GST_SEEK_FLAG_FLUSH | GST_SEEK_FLAG_KEY_UNIT, desired_position);\r
- data->desired_position = GST_CLOCK_TIME_NONE;\r
- }\r
-}\r
-\r
-/* Delayed seek callback. This gets called by the timer setup in the above function. */\r
-static gboolean delayed_seek_cb (CustomData *data) {\r
- GST_DEBUG ("Doing delayed seek to %" GST_TIME_FORMAT, GST_TIME_ARGS (data->desired_position));\r
- execute_seek (data->desired_position, data);\r
- return FALSE;\r
-}\r
-\r
-/* Retrieve errors from the bus and show them on the UI */\r
-static void error_cb (GstBus *bus, GstMessage *msg, CustomData *data) {\r
- GError *err;\r
- gchar *debug_info;\r
- gchar *message_string;\r
-\r
- gst_message_parse_error (msg, &err, &debug_info);\r
- message_string = g_strdup_printf ("Error received from element %s: %s", GST_OBJECT_NAME (msg->src), err->message);\r
- g_clear_error (&err);\r
- g_free (debug_info);\r
- set_ui_message (message_string, data);\r
- g_free (message_string);\r
- data->target_state = GST_STATE_NULL;\r
- gst_element_set_state (data->pipeline, GST_STATE_NULL);\r
-}\r
-\r
-/* Called when the End Of the Stream is reached. Just move to the beginning of the media and pause. */\r
-static void eos_cb (GstBus *bus, GstMessage *msg, CustomData *data) {\r
- data->target_state = GST_STATE_PAUSED;\r
- data->is_live = (gst_element_set_state (data->pipeline, GST_STATE_PAUSED) == GST_STATE_CHANGE_NO_PREROLL);\r
- execute_seek (0, data);\r
-}\r
-\r
-/* Called when the duration of the media changes. Just mark it as unknown, so we re-query it in the next UI refresh. */\r
-static void duration_cb (GstBus *bus, GstMessage *msg, CustomData *data) {\r
- data->duration = GST_CLOCK_TIME_NONE;\r
-}\r
-\r
-/* Called when buffering messages are received. We inform the UI about the current buffering level and\r
- * keep the pipeline paused until 100% buffering is reached. At that point, set the desired state. */\r
-static void buffering_cb (GstBus *bus, GstMessage *msg, CustomData *data) {\r
- gint percent;\r
-\r
- if (data->is_live)\r
- return;\r
-\r
- gst_message_parse_buffering (msg, &percent);\r
- if (percent < 100 && data->target_state >= GST_STATE_PAUSED) {\r
- gchar * message_string = g_strdup_printf ("Buffering %d%%", percent);\r
- gst_element_set_state (data->pipeline, GST_STATE_PAUSED);\r
- set_ui_message (message_string, data);\r
- g_free (message_string);\r
- } else if (data->target_state >= GST_STATE_PLAYING) {\r
- gst_element_set_state (data->pipeline, GST_STATE_PLAYING);\r
- } else if (data->target_state >= GST_STATE_PAUSED) {\r
- set_ui_message ("Buffering complete", data);\r
- }\r
-}\r
-\r
-/* Called when the clock is lost */\r
-static void clock_lost_cb (GstBus *bus, GstMessage *msg, CustomData *data) {\r
- if (data->target_state >= GST_STATE_PLAYING) {\r
- gst_element_set_state (data->pipeline, GST_STATE_PAUSED);\r
- gst_element_set_state (data->pipeline, GST_STATE_PLAYING);\r
- }\r
-}\r
-\r
-/* Retrieve the video sink's Caps and tell the application about the media size */\r
-static void check_media_size (CustomData *data) {\r
- JNIEnv *env = get_jni_env ();\r
- GstElement *video_sink;\r
- GstPad *video_sink_pad;\r
- GstCaps *caps;\r
- GstVideoInfo info;\r
-\r
- /* Retrieve the Caps at the entrance of the video sink */\r
- g_object_get (data->pipeline, "video-sink", &video_sink, NULL);\r
- video_sink_pad = gst_element_get_static_pad (video_sink, "sink");\r
- caps = gst_pad_get_current_caps (video_sink_pad);\r
-\r
- if (gst_video_info_from_caps (&info, caps)) {\r
- info.width = info.width * info.par_n / info.par_d;\r
- GST_DEBUG ("Media size is %dx%d, notifying application", info.width, info.height);\r
-\r
- (*env)->CallVoidMethod (env, data->app, on_media_size_changed_method_id, (jint)info.width, (jint)info.height);\r
- if ((*env)->ExceptionCheck (env)) {\r
- GST_ERROR ("Failed to call Java method");\r
- (*env)->ExceptionClear (env);\r
- }\r
- }\r
-\r
- gst_caps_unref(caps);\r
- gst_object_unref (video_sink_pad);\r
- gst_object_unref(video_sink);\r
-}\r
-\r
-/* Notify UI about pipeline state changes */\r
-static void state_changed_cb (GstBus *bus, GstMessage *msg, CustomData *data) {\r
- GstState old_state, new_state, pending_state;\r
- gst_message_parse_state_changed (msg, &old_state, &new_state, &pending_state);\r
- /* Only pay attention to messages coming from the pipeline, not its children */\r
- if (GST_MESSAGE_SRC (msg) == GST_OBJECT (data->pipeline)) {\r
- data->state = new_state;\r
- gchar *message = g_strdup_printf("State changed to %s", gst_element_state_get_name(new_state));\r
- set_ui_message(message, data);\r
- g_free (message);\r
-\r
- /* The Ready to Paused state change is particularly interesting: */\r
- if (old_state == GST_STATE_READY && new_state == GST_STATE_PAUSED) {\r
- /* By now the sink already knows the media size */\r
- check_media_size(data);\r
-\r
- /* If there was a scheduled seek, perform it now that we have moved to the Paused state */\r
- if (GST_CLOCK_TIME_IS_VALID (data->desired_position))\r
- execute_seek (data->desired_position, data);\r
- }\r
- }\r
-}\r
-\r
-/* Check if all conditions are met to report GStreamer as initialized.\r
- * These conditions will change depending on the application */\r
-static void check_initialization_complete (CustomData *data) {\r
- JNIEnv *env = get_jni_env ();\r
- if (!data->initialized && data->native_window && data->main_loop) {\r
- GST_DEBUG ("Initialization complete, notifying application. native_window:%p main_loop:%p", data->native_window, data->main_loop);\r
-\r
- /* The main loop is running and we received a native window, inform the sink about it */\r
- gst_video_overlay_set_window_handle (GST_VIDEO_OVERLAY (data->pipeline), (guintptr)data->native_window);\r
-\r
- (*env)->CallVoidMethod (env, data->app, on_gstreamer_initialized_method_id);\r
- if ((*env)->ExceptionCheck (env)) {\r
- GST_ERROR ("Failed to call Java method");\r
- (*env)->ExceptionClear (env);\r
- }\r
- data->initialized = TRUE;\r
- }\r
-}\r
-\r
-/* Main method for the native code. This is executed on its own thread. */\r
-static void *app_function (void *userdata) {\r
- JavaVMAttachArgs args;\r
- GstBus *bus;\r
- CustomData *data = (CustomData *)userdata;\r
- GSource *timeout_source;\r
- GSource *bus_source;\r
- GError *error = NULL;\r
- guint flags;\r
-\r
- GST_DEBUG ("Creating pipeline in CustomData at %p", data);\r
-\r
- /* Create our own GLib Main Context and make it the default one */\r
- data->context = g_main_context_new ();\r
- g_main_context_push_thread_default(data->context);\r
-\r
- /* Build pipeline */\r
- data->pipeline = gst_parse_launch("playbin", &error);\r
- if (error) {\r
- gchar *message = g_strdup_printf("Unable to build pipeline: %s", error->message);\r
- g_clear_error (&error);\r
- set_ui_message(message, data);\r
- g_free (message);\r
- return NULL;\r
- }\r
-\r
- /* Disable subtitles */\r
- g_object_get (data->pipeline, "flags", &flags, NULL);\r
- flags &= ~GST_PLAY_FLAG_TEXT;\r
- g_object_set (data->pipeline, "flags", flags, NULL);\r
-\r
- /* Set the pipeline to READY, so it can already accept a window handle, if we have one */\r
- data->target_state = GST_STATE_READY;\r
- gst_element_set_state(data->pipeline, GST_STATE_READY);\r
-\r
- /* Instruct the bus to emit signals for each received message, and connect to the interesting signals */\r
- bus = gst_element_get_bus (data->pipeline);\r
- bus_source = gst_bus_create_watch (bus);\r
- g_source_set_callback (bus_source, (GSourceFunc) gst_bus_async_signal_func, NULL, NULL);\r
- g_source_attach (bus_source, data->context);\r
- g_source_unref (bus_source);\r
- g_signal_connect (G_OBJECT (bus), "message::error", (GCallback)error_cb, data);\r
- g_signal_connect (G_OBJECT (bus), "message::eos", (GCallback)eos_cb, data);\r
- g_signal_connect (G_OBJECT (bus), "message::state-changed", (GCallback)state_changed_cb, data);\r
- g_signal_connect (G_OBJECT (bus), "message::duration", (GCallback)duration_cb, data);\r
- g_signal_connect (G_OBJECT (bus), "message::buffering", (GCallback)buffering_cb, data);\r
- g_signal_connect (G_OBJECT (bus), "message::clock-lost", (GCallback)clock_lost_cb, data);\r
- gst_object_unref (bus);\r
-\r
- /* Register a function that GLib will call 4 times per second */\r
- timeout_source = g_timeout_source_new (250);\r
- g_source_set_callback (timeout_source, (GSourceFunc)refresh_ui, data, NULL);\r
- g_source_attach (timeout_source, data->context);\r
- g_source_unref (timeout_source);\r
-\r
- /* Create a GLib Main Loop and set it to run */\r
- GST_DEBUG ("Entering main loop... (CustomData:%p)", data);\r
- data->main_loop = g_main_loop_new (data->context, FALSE);\r
- check_initialization_complete (data);\r
- g_main_loop_run (data->main_loop);\r
- GST_DEBUG ("Exited main loop");\r
- g_main_loop_unref (data->main_loop);\r
- data->main_loop = NULL;\r
-\r
- /* Free resources */\r
- g_main_context_pop_thread_default(data->context);\r
- g_main_context_unref (data->context);\r
- data->target_state = GST_STATE_NULL;\r
- gst_element_set_state (data->pipeline, GST_STATE_NULL);\r
- gst_object_unref (data->pipeline);\r
-\r
- return NULL;\r
-}\r
-\r
-/*\r
- * Java Bindings\r
- */\r
-\r
-/* Instruct the native code to create its internal data structure, pipeline and thread */\r
-static void gst_native_init (JNIEnv* env, jobject thiz) {\r
- CustomData *data = g_new0 (CustomData, 1);\r
- data->desired_position = GST_CLOCK_TIME_NONE;\r
- data->last_seek_time = GST_CLOCK_TIME_NONE;\r
- SET_CUSTOM_DATA (env, thiz, custom_data_field_id, data);\r
- GST_DEBUG_CATEGORY_INIT (debug_category, "tutorial-4", 0, "Android tutorial 4");\r
- gst_debug_set_threshold_for_name("tutorial-4", GST_LEVEL_DEBUG);\r
- GST_DEBUG ("Created CustomData at %p", data);\r
- data->app = (*env)->NewGlobalRef (env, thiz);\r
- GST_DEBUG ("Created GlobalRef for app object at %p", data->app);\r
- pthread_create (&gst_app_thread, NULL, &app_function, data);\r
-}\r
-\r
-/* Quit the main loop, remove the native thread and free resources */\r
-static void gst_native_finalize (JNIEnv* env, jobject thiz) {\r
- CustomData *data = GET_CUSTOM_DATA (env, thiz, custom_data_field_id);\r
- if (!data) return;\r
- GST_DEBUG ("Quitting main loop...");\r
- g_main_loop_quit (data->main_loop);\r
- GST_DEBUG ("Waiting for thread to finish...");\r
- pthread_join (gst_app_thread, NULL);\r
- GST_DEBUG ("Deleting GlobalRef for app object at %p", data->app);\r
- (*env)->DeleteGlobalRef (env, data->app);\r
- GST_DEBUG ("Freeing CustomData at %p", data);\r
- g_free (data);\r
- SET_CUSTOM_DATA (env, thiz, custom_data_field_id, NULL);\r
- GST_DEBUG ("Done finalizing");\r
-}\r
-\r
-/* Set playbin's URI */\r
-void gst_native_set_uri (JNIEnv* env, jobject thiz, jstring uri) {\r
- CustomData *data = GET_CUSTOM_DATA (env, thiz, custom_data_field_id);\r
- if (!data || !data->pipeline) return;\r
- const jbyte *char_uri = (*env)->GetStringUTFChars (env, uri, NULL);\r
- GST_DEBUG ("Setting URI to %s", char_uri);\r
- if (data->target_state >= GST_STATE_READY)\r
- gst_element_set_state (data->pipeline, GST_STATE_READY);\r
- g_object_set(data->pipeline, "uri", char_uri, NULL);\r
- (*env)->ReleaseStringUTFChars (env, uri, char_uri);\r
- data->duration = GST_CLOCK_TIME_NONE;\r
- data->is_live = (gst_element_set_state (data->pipeline, data->target_state) == GST_STATE_CHANGE_NO_PREROLL);\r
-}\r
-\r
-/* Set pipeline to PLAYING state */\r
-static void gst_native_play (JNIEnv* env, jobject thiz) {\r
- CustomData *data = GET_CUSTOM_DATA (env, thiz, custom_data_field_id);\r
- if (!data) return;\r
- GST_DEBUG ("Setting state to PLAYING");\r
- data->target_state = GST_STATE_PLAYING;\r
- data->is_live = (gst_element_set_state (data->pipeline, GST_STATE_PLAYING) == GST_STATE_CHANGE_NO_PREROLL);\r
-}\r
-\r
-/* Set pipeline to PAUSED state */\r
-static void gst_native_pause (JNIEnv* env, jobject thiz) {\r
- CustomData *data = GET_CUSTOM_DATA (env, thiz, custom_data_field_id);\r
- if (!data) return;\r
- GST_DEBUG ("Setting state to PAUSED");\r
- data->target_state = GST_STATE_PAUSED;\r
- data->is_live = (gst_element_set_state (data->pipeline, GST_STATE_PAUSED) == GST_STATE_CHANGE_NO_PREROLL);\r
-}\r
-\r
-/* Instruct the pipeline to seek to a different position */\r
-void gst_native_set_position (JNIEnv* env, jobject thiz, int milliseconds) {\r
- CustomData *data = GET_CUSTOM_DATA (env, thiz, custom_data_field_id);\r
- if (!data) return;\r
- gint64 desired_position = (gint64)(milliseconds * GST_MSECOND);\r
- if (data->state >= GST_STATE_PAUSED) {\r
- execute_seek(desired_position, data);\r
- } else {\r
- GST_DEBUG ("Scheduling seek to %" GST_TIME_FORMAT " for later", GST_TIME_ARGS (desired_position));\r
- data->desired_position = desired_position;\r
- }\r
-}\r
-\r
-/* Static class initializer: retrieve method and field IDs */\r
-static jboolean gst_native_class_init (JNIEnv* env, jclass klass) {\r
- custom_data_field_id = (*env)->GetFieldID (env, klass, "native_custom_data", "J");\r
- set_message_method_id = (*env)->GetMethodID (env, klass, "setMessage", "(Ljava/lang/String;)V");\r
- set_current_position_method_id = (*env)->GetMethodID (env, klass, "setCurrentPosition", "(II)V");\r
- on_gstreamer_initialized_method_id = (*env)->GetMethodID (env, klass, "onGStreamerInitialized", "()V");\r
- on_media_size_changed_method_id = (*env)->GetMethodID (env, klass, "onMediaSizeChanged", "(II)V");\r
-\r
- if (!custom_data_field_id || !set_message_method_id || !on_gstreamer_initialized_method_id ||\r
- !on_media_size_changed_method_id || !set_current_position_method_id) {\r
- /* We emit this message through the Android log instead of the GStreamer log because the later\r
- * has not been initialized yet.\r
- */\r
- __android_log_print (ANDROID_LOG_ERROR, "tutorial-4", "The calling class does not implement all necessary interface methods");\r
- return JNI_FALSE;\r
- }\r
- return JNI_TRUE;\r
-}\r
-\r
-static void gst_native_surface_init (JNIEnv *env, jobject thiz, jobject surface) {\r
- CustomData *data = GET_CUSTOM_DATA (env, thiz, custom_data_field_id);\r
- if (!data) return;\r
- ANativeWindow *new_native_window = ANativeWindow_fromSurface(env, surface);\r
- GST_DEBUG ("Received surface %p (native window %p)", surface, new_native_window);\r
-\r
- if (data->native_window) {\r
- ANativeWindow_release (data->native_window);\r
- if (data->native_window == new_native_window) {\r
- GST_DEBUG ("New native window is the same as the previous one %p", data->native_window);\r
- if (data->pipeline) {\r
- gst_video_overlay_expose(GST_VIDEO_OVERLAY (data->pipeline));\r
- gst_video_overlay_expose(GST_VIDEO_OVERLAY (data->pipeline));\r
- }\r
- return;\r
- } else {\r
- GST_DEBUG ("Released previous native window %p", data->native_window);\r
- data->initialized = FALSE;\r
- }\r
- }\r
- data->native_window = new_native_window;\r
-\r
- check_initialization_complete (data);\r
-}\r
-\r
-static void gst_native_surface_finalize (JNIEnv *env, jobject thiz) {\r
- CustomData *data = GET_CUSTOM_DATA (env, thiz, custom_data_field_id);\r
- if (!data) return;\r
- GST_DEBUG ("Releasing Native Window %p", data->native_window);\r
-\r
- if (data->pipeline) {\r
- gst_video_overlay_set_window_handle (GST_VIDEO_OVERLAY (data->pipeline), (guintptr)NULL);\r
- gst_element_set_state (data->pipeline, GST_STATE_READY);\r
- }\r
-\r
- ANativeWindow_release (data->native_window);\r
- data->native_window = NULL;\r
- data->initialized = FALSE;\r
-}\r
-\r
-/* List of implemented native methods */\r
-static JNINativeMethod native_methods[] = {\r
- { "nativeInit", "()V", (void *) gst_native_init},\r
- { "nativeFinalize", "()V", (void *) gst_native_finalize},\r
- { "nativeSetUri", "(Ljava/lang/String;)V", (void *) gst_native_set_uri},\r
- { "nativePlay", "()V", (void *) gst_native_play},\r
- { "nativePause", "()V", (void *) gst_native_pause},\r
- { "nativeSetPosition", "(I)V", (void*) gst_native_set_position},\r
- { "nativeSurfaceInit", "(Ljava/lang/Object;)V", (void *) gst_native_surface_init},\r
- { "nativeSurfaceFinalize", "()V", (void *) gst_native_surface_finalize},\r
- { "nativeClassInit", "()Z", (void *) gst_native_class_init}\r
-};\r
-\r
-/* Library initializer */\r
-jint JNI_OnLoad(JavaVM *vm, void *reserved) {\r
- JNIEnv *env = NULL;\r
-\r
- java_vm = vm;\r
-\r
- if ((*vm)->GetEnv(vm, (void**) &env, JNI_VERSION_1_4) != JNI_OK) {\r
- __android_log_print (ANDROID_LOG_ERROR, "tutorial-4", "Could not retrieve JNIEnv");\r
- return 0;\r
- }\r
- jclass klass = (*env)->FindClass (env, "com/gst_sdk_tutorials/tutorial_4/Tutorial4");\r
- (*env)->RegisterNatives (env, klass, native_methods, G_N_ELEMENTS(native_methods));\r
-\r
- pthread_key_create (¤t_jni_env, detach_current_thread);\r
-\r
- return JNI_VERSION_1_4;\r
-}\r
+#include <string.h>
+#include <stdint.h>
+#include <jni.h>
+#include <android/log.h>
+#include <android/native_window.h>
+#include <android/native_window_jni.h>
+#include <gst/gst.h>
+#include <gst/video/video.h>
+#include <pthread.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
+
+/* Do not allow seeks to be performed closer than this distance. It is visually useless, and will probably
+ * confuse some demuxers. */
+#define SEEK_MIN_DELAY (500 * GST_MSECOND)
+
+/* 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 */
+ ANativeWindow *native_window; /* The Android native window where video will be rendered */
+ GstState state; /* Current pipeline state */
+ GstState target_state; /* Desired pipeline state, to be set once buffering is complete */
+ gint64 duration; /* Cached clip duration */
+ gint64 desired_position; /* Position to seek to, once the pipeline is running */
+ GstClockTime last_seek_time; /* For seeking overflow prevention (throttling) */
+ gboolean is_live; /* Live streams do not use buffering */
+} CustomData;
+
+/* playbin flags */
+typedef enum {
+ GST_PLAY_FLAG_TEXT = (1 << 2) /* We want subtitle output */
+} GstPlayFlags;
+
+/* 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 set_current_position_method_id;
+static jmethodID on_gstreamer_initialized_method_id;
+static jmethodID on_media_size_changed_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);
+}
+
+/* Tell the application what is the current position and clip duration */
+static void set_current_ui_position (gint position, gint duration, CustomData *data) {
+ JNIEnv *env = get_jni_env ();
+ (*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);
+ }
+}
+
+/* If we have pipeline and it is running, query the current position and clip duration and inform
+ * the application */
+static gboolean refresh_ui (CustomData *data) {
+ gint64 current = -1;
+ gint64 position;
+
+ /* 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, GST_FORMAT_TIME, &data->duration)) {
+ GST_WARNING ("Could not query current duration");
+ }
+ }
+
+ if (gst_element_query_position (data->pipeline, GST_FORMAT_TIME, &position)) {
+ /* Java expects these values in milliseconds, and GStreamer provides nanoseconds */
+ set_current_ui_position (position / GST_MSECOND, data->duration / GST_MSECOND, data);
+ }
+ return TRUE;
+}
+
+/* Forward declaration for the delayed seek callback */
+static gboolean delayed_seek_cb (CustomData *data);
+
+/* Perform seek, if we are not too close to the previous seek. Otherwise, schedule the seek for
+ * some time in the future. */
+static void execute_seek (gint64 desired_position, CustomData *data) {
+ 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 < SEEK_MIN_DELAY) {
+ /* The previous seek was too close, delay this one */
+ GSource *timeout_source;
+
+ if (data->desired_position == GST_CLOCK_TIME_NONE) {
+ /* There was no previous seek scheduled. Setup a timer for some time in the future */
+ timeout_source = g_timeout_source_new ((SEEK_MIN_DELAY - diff) / GST_MSECOND);
+ g_source_set_callback (timeout_source, (GSourceFunc)delayed_seek_cb, data, NULL);
+ g_source_attach (timeout_source, data->context);
+ g_source_unref (timeout_source);
+ }
+ /* Update the desired seek position. If multiple requests are received before it is time
+ * to perform a seek, only the last one is remembered. */
+ 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 (SEEK_MIN_DELAY - diff));
+ } else {
+ /* Perform the seek now */
+ GST_DEBUG ("Seeking to %" GST_TIME_FORMAT, GST_TIME_ARGS (desired_position));
+ data->last_seek_time = gst_util_get_timestamp ();
+ gst_element_seek_simple (data->pipeline, GST_FORMAT_TIME, GST_SEEK_FLAG_FLUSH | GST_SEEK_FLAG_KEY_UNIT, desired_position);
+ data->desired_position = GST_CLOCK_TIME_NONE;
+ }
+}
+
+/* Delayed seek callback. This gets called by the timer setup in the above function. */
+static gboolean delayed_seek_cb (CustomData *data) {
+ GST_DEBUG ("Doing delayed seek to %" GST_TIME_FORMAT, GST_TIME_ARGS (data->desired_position));
+ execute_seek (data->desired_position, data);
+ return FALSE;
+}
+
+/* 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);
+ data->target_state = GST_STATE_NULL;
+ gst_element_set_state (data->pipeline, GST_STATE_NULL);
+}
+
+/* Called when the End Of the Stream is reached. Just move to the beginning of the media and pause. */
+static void eos_cb (GstBus *bus, GstMessage *msg, CustomData *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);
+}
+
+/* Called when the duration of the media changes. Just mark it as unknown, so we re-query it in the next UI refresh. */
+static void duration_cb (GstBus *bus, GstMessage *msg, CustomData *data) {
+ data->duration = GST_CLOCK_TIME_NONE;
+}
+
+/* Called when buffering messages are received. We inform the UI about the current buffering level and
+ * keep the pipeline paused until 100% buffering is reached. At that point, set the desired state. */
+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);
+ } else if (data->target_state >= GST_STATE_PAUSED) {
+ set_ui_message ("Buffering complete", data);
+ }
+}
+
+/* Called when the clock is lost */
+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);
+ }
+}
+
+/* Retrieve the video sink's Caps and tell the application about the media size */
+static void check_media_size (CustomData *data) {
+ JNIEnv *env = get_jni_env ();
+ GstElement *video_sink;
+ GstPad *video_sink_pad;
+ GstCaps *caps;
+ GstVideoInfo info;
+
+ /* Retrieve the Caps at the entrance of the video sink */
+ g_object_get (data->pipeline, "video-sink", &video_sink, NULL);
+ video_sink_pad = gst_element_get_static_pad (video_sink, "sink");
+ caps = gst_pad_get_current_caps (video_sink_pad);
+
+ if (gst_video_info_from_caps (&info, caps)) {
+ info.width = info.width * info.par_n / info.par_d;
+ GST_DEBUG ("Media size is %dx%d, notifying application", info.width, info.height);
+
+ (*env)->CallVoidMethod (env, data->app, on_media_size_changed_method_id, (jint)info.width, (jint)info.height);
+ if ((*env)->ExceptionCheck (env)) {
+ GST_ERROR ("Failed to call Java method");
+ (*env)->ExceptionClear (env);
+ }
+ }
+
+ gst_caps_unref(caps);
+ gst_object_unref (video_sink_pad);
+ gst_object_unref(video_sink);
+}
+
+/* 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)) {
+ data->state = new_state;
+ gchar *message = g_strdup_printf("State changed to %s", gst_element_state_get_name(new_state));
+ set_ui_message(message, data);
+ g_free (message);
+
+ /* The Ready to Paused state change is particularly interesting: */
+ if (old_state == GST_STATE_READY && new_state == GST_STATE_PAUSED) {
+ /* By now the sink already knows the media size */
+ check_media_size(data);
+
+ /* If there was a scheduled seek, perform it now that we have moved to the Paused state */
+ if (GST_CLOCK_TIME_IS_VALID (data->desired_position))
+ execute_seek (data->desired_position, data);
+ }
+ }
+}
+
+/* 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_video_overlay_set_window_handle (GST_VIDEO_OVERLAY (data->pipeline), (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 *timeout_source;
+ GSource *bus_source;
+ GError *error = NULL;
+ guint flags;
+
+ 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("playbin", &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;
+ }
+
+ /* Disable subtitles */
+ g_object_get (data->pipeline, "flags", &flags, NULL);
+ flags &= ~GST_PLAY_FLAG_TEXT;
+ g_object_set (data->pipeline, "flags", flags, NULL);
+
+ /* Set the pipeline to READY, so it can already accept a window handle, if we have one */
+ data->target_state = GST_STATE_READY;
+ gst_element_set_state(data->pipeline, GST_STATE_READY);
+
+ /* 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_set_callback (timeout_source, (GSourceFunc)refresh_ui, data, NULL);
+ g_source_attach (timeout_source, data->context);
+ 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_pop_thread_default(data->context);
+ 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
+ */
+
+/* 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);
+ 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_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 playbin's URI */
+void gst_native_set_uri (JNIEnv* env, jobject thiz, jstring uri) {
+ CustomData *data = GET_CUSTOM_DATA (env, thiz, custom_data_field_id);
+ if (!data || !data->pipeline) return;
+ const jbyte *char_uri = (*env)->GetStringUTFChars (env, uri, NULL);
+ GST_DEBUG ("Setting URI to %s", char_uri);
+ if (data->target_state >= GST_STATE_READY)
+ gst_element_set_state (data->pipeline, GST_STATE_READY);
+ g_object_set(data->pipeline, "uri", char_uri, NULL);
+ (*env)->ReleaseStringUTFChars (env, uri, char_uri);
+ data->duration = GST_CLOCK_TIME_NONE;
+ data->is_live = (gst_element_set_state (data->pipeline, data->target_state) == GST_STATE_CHANGE_NO_PREROLL);
+}
+
+/* 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");
+ data->target_state = GST_STATE_PLAYING;
+ data->is_live = (gst_element_set_state (data->pipeline, GST_STATE_PLAYING) == GST_STATE_CHANGE_NO_PREROLL);
+}
+
+/* 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");
+ data->target_state = GST_STATE_PAUSED;
+ data->is_live = (gst_element_set_state (data->pipeline, GST_STATE_PAUSED) == GST_STATE_CHANGE_NO_PREROLL);
+}
+
+/* Instruct the pipeline to seek to a different position */
+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_PAUSED) {
+ execute_seek(desired_position, data);
+ } else {
+ GST_DEBUG ("Scheduling seek to %" GST_TIME_FORMAT " for later", GST_TIME_ARGS (desired_position));
+ data->desired_position = desired_position;
+ }
+}
+
+/* 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");
+ set_current_position_method_id = (*env)->GetMethodID (env, klass, "setCurrentPosition", "(II)V");
+ on_gstreamer_initialized_method_id = (*env)->GetMethodID (env, klass, "onGStreamerInitialized", "()V");
+ on_media_size_changed_method_id = (*env)->GetMethodID (env, klass, "onMediaSizeChanged", "(II)V");
+
+ if (!custom_data_field_id || !set_message_method_id || !on_gstreamer_initialized_method_id ||
+ !on_media_size_changed_method_id || !set_current_position_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 %p", data->native_window);
+ if (data->pipeline) {
+ gst_video_overlay_expose(GST_VIDEO_OVERLAY (data->pipeline));
+ gst_video_overlay_expose(GST_VIDEO_OVERLAY (data->pipeline));
+ }
+ 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->pipeline) {
+ gst_video_overlay_set_window_handle (GST_VIDEO_OVERLAY (data->pipeline), (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},
+ { "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},
+ { "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;
+}
projects / platform / upstream / gstreamer.git / blobdiff