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Implement throttling of seeks, only one seek per 500ms

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This commit is contained in:
Sebastian Dröge 2012-10-01 14:43:01 +02:00
parent 76c883fb8b
commit 3123532841
1 changed files with 41 additions and 10 deletions
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45
gst-sdk/tutorials/android-tutorial-1/jni/tutorial-1.c
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@ -24,12 +24,14 @@ GST_DEBUG_CATEGORY_STATIC (debug_category);
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;
@ -123,11 +125,40 @@ static gboolean refresh_ui (CustomData *data) {
return TRUE;
}
static void execute_seek (gint64 desired_position, CustomData *data);
static gboolean
delayed_seek_cb (CustomData *data)
{
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;
data->desired_position = 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);
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) {
@ -226,12 +257,11 @@ static void *app_function (void *userdata) {
CustomData *data = (CustomData *)userdata;
GSource *timeout_source;
GSource *bus_source;
GMainContext *context;
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 */
context = g_main_context_new ();
data->context = g_main_context_new ();
data->pipeline = gst_element_factory_make ("playbin2", NULL);
@ -244,7 +274,7 @@ static void *app_function (void *userdata) {
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, context);
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);
@ -256,13 +286,13 @@ static void *app_function (void *userdata) {
/* Register a function that GLib will call 4 times per second */
timeout_source = g_timeout_source_new (250);
g_source_attach (timeout_source, context);
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 (context, FALSE);
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");
@ -270,7 +300,7 @@ static void *app_function (void *userdata) {
data->main_loop = NULL;
/* Free resources */
g_main_context_unref (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);
@ -282,9 +312,10 @@ static void *app_function (void *userdata) {
* Java Bindings
*/
void gst_native_init (JNIEnv* env, jobject thiz) {
CustomData *data = (CustomData *)g_malloc0 (sizeof (CustomData));
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);