static GstFlowReturn
gst_app_sink_preroll (GstBaseSink * psink, GstBuffer * buffer)
{
GstFlowReturn res = GST_FLOW_OK;
GstAppSink *appsink = GST_APP_SINK_CAST (psink);
GstAppSinkPrivate *priv = appsink->priv;
gboolean emit;
g_mutex_lock (priv->mutex);
if (priv->flushing)
goto flushing;
GST_DEBUG_OBJECT (appsink, "setting preroll buffer %p", buffer);
gst_buffer_replace (&priv->preroll, buffer);
g_cond_signal (priv->cond);
emit = priv->emit_signals;
g_mutex_unlock (priv->mutex);
if (priv->callbacks.new_preroll)
res = priv->callbacks.new_preroll (appsink, priv->user_data);
else if (emit)
g_signal_emit (appsink, gst_app_sink_signals[SIGNAL_NEW_PREROLL], 0);
return res;
flushing:
{
GST_DEBUG_OBJECT (appsink, "we are flushing");
g_mutex_unlock (priv->mutex);
return GST_FLOW_FLUSHING;
}
}
static void
gst_app_sink_get_property (GObject * object, guint prop_id, GValue * value,
GParamSpec * pspec)
{
GstAppSink *appsink = GST_APP_SINK_CAST (object);
switch (prop_id) {
case PROP_CAPS:
{
GstCaps *caps;
caps = gst_app_sink_get_caps (appsink);
gst_value_set_caps (value, caps);
if (caps)
gst_caps_unref (caps);
break;
}
case PROP_EOS:
g_value_set_boolean (value, gst_app_sink_is_eos (appsink));
break;
case PROP_EMIT_SIGNALS:
g_value_set_boolean (value, gst_app_sink_get_emit_signals (appsink));
break;
case PROP_MAX_BUFFERS:
g_value_set_uint (value, gst_app_sink_get_max_buffers (appsink));
break;
case PROP_DROP:
g_value_set_boolean (value, gst_app_sink_get_drop (appsink));
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
break;
}
}
static void
gst_app_sink_dispose (GObject * obj)
{
GstAppSink *appsink = GST_APP_SINK_CAST (obj);
GstAppSinkPrivate *priv = appsink->priv;
GstMiniObject *queue_obj;
GST_OBJECT_LOCK (appsink);
if (priv->caps) {
gst_caps_unref (priv->caps);
priv->caps = NULL;
}
if (priv->notify) {
priv->notify (priv->user_data);
}
priv->user_data = NULL;
priv->notify = NULL;
GST_OBJECT_UNLOCK (appsink);
g_mutex_lock (&priv->mutex);
while ((queue_obj = g_queue_pop_head (priv->queue)))
gst_mini_object_unref (queue_obj);
gst_buffer_replace (&priv->preroll, NULL);
gst_caps_replace (&priv->preroll_caps, NULL);
gst_caps_replace (&priv->last_caps, NULL);
g_mutex_unlock (&priv->mutex);
G_OBJECT_CLASS (parent_class)->dispose (obj);
}
static void
gst_app_sink_set_property (GObject * object, guint prop_id,
const GValue * value, GParamSpec * pspec)
{
GstAppSink *appsink = GST_APP_SINK_CAST (object);
switch (prop_id) {
case PROP_CAPS:
gst_app_sink_set_caps (appsink, gst_value_get_caps (value));
break;
case PROP_EMIT_SIGNALS:
gst_app_sink_set_emit_signals (appsink, g_value_get_boolean (value));
break;
case PROP_MAX_BUFFERS:
gst_app_sink_set_max_buffers (appsink, g_value_get_uint (value));
break;
case PROP_DROP:
gst_app_sink_set_drop (appsink, g_value_get_boolean (value));
break;
case PROP_WAIT_ON_EOS:
gst_app_sink_set_wait_on_eos (appsink, g_value_get_boolean (value));
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
break;
}
}
static void
gst_app_sink_finalize (GObject * obj)
{
GstAppSink *appsink = GST_APP_SINK_CAST (obj);
GstAppSinkPrivate *priv = appsink->priv;
g_mutex_clear (&priv->mutex);
g_cond_clear (&priv->cond);
g_queue_free (priv->queue);
G_OBJECT_CLASS (parent_class)->finalize (obj);
}
static gboolean
gst_app_sink_unlock_stop (GstBaseSink * bsink)
{
GstAppSink *appsink = GST_APP_SINK_CAST (bsink);
GstAppSinkPrivate *priv = appsink->priv;
g_mutex_lock (&priv->mutex);
GST_DEBUG_OBJECT (appsink, "unlock stop");
priv->unlock = FALSE;
g_cond_signal (&priv->cond);
g_mutex_unlock (&priv->mutex);
return TRUE;
}
static gboolean
gst_app_sink_setcaps (GstBaseSink * sink, GstCaps * caps)
{
GstAppSink *appsink = GST_APP_SINK_CAST (sink);
GstAppSinkPrivate *priv = appsink->priv;
g_mutex_lock (priv->mutex);
GST_DEBUG_OBJECT (appsink, "receiving CAPS");
g_queue_push_tail (priv->queue, gst_event_new_caps (caps));
gst_caps_replace (&priv->preroll_caps, caps);
g_mutex_unlock (priv->mutex);
return TRUE;
}
static gboolean
gst_app_sink_start (GstBaseSink * psink)
{
GstAppSink *appsink = GST_APP_SINK_CAST (psink);
GstAppSinkPrivate *priv = appsink->priv;
g_mutex_lock (priv->mutex);
GST_DEBUG_OBJECT (appsink, "starting");
priv->flushing = FALSE;
priv->started = TRUE;
gst_segment_init (&priv->last_segment, GST_FORMAT_TIME);
g_mutex_unlock (priv->mutex);
return TRUE;
}
static gboolean
gst_app_sink_stop (GstBaseSink * psink)
{
GstAppSink *appsink = GST_APP_SINK_CAST (psink);
GstAppSinkPrivate *priv = appsink->priv;
g_mutex_lock (priv->mutex);
GST_DEBUG_OBJECT (appsink, "stopping");
priv->flushing = TRUE;
priv->started = FALSE;
gst_app_sink_flush_unlocked (appsink);
gst_caps_replace (&priv->preroll_caps, NULL);
gst_caps_replace (&priv->last_caps, NULL);
g_mutex_unlock (priv->mutex);
return TRUE;
}
static GstCaps *
gst_app_sink_getcaps (GstBaseSink * psink, GstCaps * filter)
{
GstCaps *caps;
GstAppSink *appsink = GST_APP_SINK_CAST (psink);
GstAppSinkPrivate *priv = appsink->priv;
GST_OBJECT_LOCK (appsink);
if ((caps = priv->caps)) {
if (filter)
caps = gst_caps_intersect_full (filter, caps, GST_CAPS_INTERSECT_FIRST);
else
gst_caps_ref (caps);
}
GST_DEBUG_OBJECT (appsink, "got caps %" GST_PTR_FORMAT, caps);
GST_OBJECT_UNLOCK (appsink);
return caps;
}
static gboolean
gst_app_sink_event (GstBaseSink * sink, GstEvent * event)
{
GstAppSink *appsink = GST_APP_SINK_CAST (sink);
GstAppSinkPrivate *priv = appsink->priv;
switch (event->type) {
case GST_EVENT_SEGMENT:
g_mutex_lock (priv->mutex);
GST_DEBUG_OBJECT (appsink, "receiving SEGMENT");
g_queue_push_tail (priv->queue, gst_event_ref (event));
g_mutex_unlock (priv->mutex);
break;
case GST_EVENT_EOS:
g_mutex_lock (priv->mutex);
GST_DEBUG_OBJECT (appsink, "receiving EOS");
priv->is_eos = TRUE;
g_cond_signal (priv->cond);
g_mutex_unlock (priv->mutex);
/* emit EOS now */
if (priv->callbacks.eos)
priv->callbacks.eos (appsink, priv->user_data);
else
g_signal_emit (appsink, gst_app_sink_signals[SIGNAL_EOS], 0);
break;
case GST_EVENT_FLUSH_START:
/* we don't have to do anything here, the base class will call unlock
* which will make sure we exit the _render method */
GST_DEBUG_OBJECT (appsink, "received FLUSH_START");
break;
case GST_EVENT_FLUSH_STOP:
g_mutex_lock (priv->mutex);
GST_DEBUG_OBJECT (appsink, "received FLUSH_STOP");
gst_app_sink_flush_unlocked (appsink);
g_mutex_unlock (priv->mutex);
break;
default:
break;
}
return GST_BASE_SINK_CLASS (parent_class)->event (sink, event);
}
static GstFlowReturn
gst_app_sink_render (GstBaseSink * psink, GstBuffer * buffer)
{
GstFlowReturn ret;
GstAppSink *appsink = GST_APP_SINK_CAST (psink);
GstAppSinkPrivate *priv = appsink->priv;
gboolean emit;
restart:
g_mutex_lock (&priv->mutex);
if (priv->flushing)
goto flushing;
/* queue holding caps event might have been FLUSHed,
* but caps state still present in pad caps */
if (G_UNLIKELY (!priv->last_caps &&
gst_pad_has_current_caps (GST_BASE_SINK_PAD (psink)))) {
priv->last_caps = gst_pad_get_current_caps (GST_BASE_SINK_PAD (psink));
GST_DEBUG_OBJECT (appsink, "activating pad caps %" GST_PTR_FORMAT,
priv->last_caps);
}
GST_DEBUG_OBJECT (appsink, "pushing render buffer %p on queue (%d)",
buffer, priv->num_buffers);
while (priv->max_buffers > 0 && priv->num_buffers >= priv->max_buffers) {
if (priv->drop) {
GstBuffer *old;
/* we need to drop the oldest buffer and try again */
if ((old = dequeue_buffer (appsink))) {
GST_DEBUG_OBJECT (appsink, "dropping old buffer %p", old);
gst_buffer_unref (old);
}
} else {
GST_DEBUG_OBJECT (appsink, "waiting for free space, length %d >= %d",
priv->num_buffers, priv->max_buffers);
if (priv->unlock) {
/* we are asked to unlock, call the wait_preroll method */
g_mutex_unlock (&priv->mutex);
if ((ret = gst_base_sink_wait_preroll (psink)) != GST_FLOW_OK)
goto stopping;
/* we are allowed to continue now */
goto restart;
}
/* wait for a buffer to be removed or flush */
g_cond_wait (&priv->cond, &priv->mutex);
if (priv->flushing)
goto flushing;
}
}
/* we need to ref the buffer when pushing it in the queue */
g_queue_push_tail (priv->queue, gst_buffer_ref (buffer));
priv->num_buffers++;
g_cond_signal (&priv->cond);
emit = priv->emit_signals;
g_mutex_unlock (&priv->mutex);
if (priv->callbacks.new_sample) {
ret = priv->callbacks.new_sample (appsink, priv->user_data);
} else {
ret = GST_FLOW_OK;
if (emit)
g_signal_emit (appsink, gst_app_sink_signals[SIGNAL_NEW_SAMPLE], 0, &ret);
}
return ret;
flushing:
{
GST_DEBUG_OBJECT (appsink, "we are flushing");
g_mutex_unlock (&priv->mutex);
return GST_FLOW_FLUSHING;
}
stopping:
{
GST_DEBUG_OBJECT (appsink, "we are stopping");
return ret;
}
}
static gboolean
gst_app_sink_event (GstBaseSink * sink, GstEvent * event)
{
GstAppSink *appsink = GST_APP_SINK_CAST (sink);
GstAppSinkPrivate *priv = appsink->priv;
switch (event->type) {
case GST_EVENT_SEGMENT:
g_mutex_lock (&priv->mutex);
GST_DEBUG_OBJECT (appsink, "receiving SEGMENT");
g_queue_push_tail (priv->queue, gst_event_ref (event));
if (!priv->preroll)
gst_event_copy_segment (event, &priv->preroll_segment);
g_mutex_unlock (&priv->mutex);
break;
case GST_EVENT_EOS:{
gboolean emit = TRUE;
g_mutex_lock (&priv->mutex);
GST_DEBUG_OBJECT (appsink, "receiving EOS");
priv->is_eos = TRUE;
g_cond_signal (&priv->cond);
g_mutex_unlock (&priv->mutex);
g_mutex_lock (&priv->mutex);
/* wait until all buffers are consumed or we're flushing.
* Otherwise we might signal EOS before all buffers are
* consumed, which is a bit confusing for the application
*/
while (priv->num_buffers > 0 && !priv->flushing)
g_cond_wait (&priv->cond, &priv->mutex);
if (priv->flushing)
emit = FALSE;
g_mutex_unlock (&priv->mutex);
if (emit) {
/* emit EOS now */
if (priv->callbacks.eos)
priv->callbacks.eos (appsink, priv->user_data);
else
g_signal_emit (appsink, gst_app_sink_signals[SIGNAL_EOS], 0);
}
break;
}
case GST_EVENT_FLUSH_START:
/* we don't have to do anything here, the base class will call unlock
* which will make sure we exit the _render method */
GST_DEBUG_OBJECT (appsink, "received FLUSH_START");
break;
case GST_EVENT_FLUSH_STOP:
g_mutex_lock (&priv->mutex);
GST_DEBUG_OBJECT (appsink, "received FLUSH_STOP");
gst_app_sink_flush_unlocked (appsink);
g_mutex_unlock (&priv->mutex);
break;
default:
break;
}
return GST_BASE_SINK_CLASS (parent_class)->event (sink, event);
}
