static GstFlowReturn on_new_preroll_from_source (GstAppSink * elt, void * data)
{
guint size;
GstBuffer *buffer;
ofGstVideoData * gstData = (ofGstVideoData *) data;
//get the buffer from appsink
buffer = gst_app_sink_pull_preroll (GST_APP_SINK (elt));
size = GST_BUFFER_SIZE (buffer);
/*if(size < data->width*data->height*3){
gst_buffer_unref (buffer);
return;
}*/
ofGstDataLock(gstData);
if(gstData->pixels){
memcpy (gstData->pixels, GST_BUFFER_DATA (buffer), size);
gstData->bHavePixelsChanged=true;
}
ofGstDataUnlock(gstData);
/// we don't need the appsink buffer anymore
gst_buffer_unref (buffer);
return GST_FLOW_OK;
}
bool ofGstUtils::startPipeline() {
gstData.pipeline=gstPipeline;
// pause the pipeline
if(gst_element_set_state(GST_ELEMENT(gstPipeline), GST_STATE_PAUSED) ==
GST_STATE_CHANGE_FAILURE) {
// ofLog(OF_LOG_ERROR, "GStreamer: unable to set pipeline to paused\n");
return false;
}
bool ret = false;
if(!bIsStream) {
ofGstDataLock(&gstData);
ret = allocate();
ofGstDataUnlock(&gstData);
} else {
ret = true;
}
if(gstSink) {
// set the appsink to emit signals to get eos and errors
g_object_set (G_OBJECT (gstSink), "emit-signals", FALSE, "sync", !bFrameByFrame, (void*)NULL);
/*g_signal_connect (gstSink, "new-buffer", G_CALLBACK (on_new_buffer_from_source), &gstData);
g_signal_connect (gstSink, "new-preroll", G_CALLBACK (on_new_preroll_from_source), &gstData);*/
if(!bFrameByFrame) {
// printf("SET CALLBACKS\n");
GstAppSinkCallbacks gstCallbacks;
gstCallbacks.eos = &on_eos_from_source;
gstCallbacks.new_preroll = &on_new_preroll_from_source;
gstCallbacks.new_buffer = &on_new_buffer_from_source;
gst_app_sink_set_callbacks(GST_APP_SINK(gstSink), &gstCallbacks, &gstData, NULL);
}
}
setSpeed(1.0);
return ret;
}
void ofGstUtils::update(){
gstHandleMessage();
if (bLoaded == true){
if(!bFrameByFrame){
ofGstDataLock(&gstData);
bHavePixelsChanged = gstData.bHavePixelsChanged;
if (bHavePixelsChanged){
gstData.bHavePixelsChanged=false;
bIsMovieDone = false;
memcpy(pixels,gstData.pixels,width*height*bpp);
}
ofGstDataUnlock(&gstData);
}else{
GstBuffer *buffer;
//get the buffer from appsink
if(bPaused) buffer = gst_app_sink_pull_preroll (GST_APP_SINK (gstSink));
else buffer = gst_app_sink_pull_buffer (GST_APP_SINK (gstSink));
if(buffer){
guint size = GST_BUFFER_SIZE (buffer);
if(pixels){
memcpy (pixels, GST_BUFFER_DATA (buffer), size);
bHavePixelsChanged=true;
}
/// we don't need the appsink buffer anymore
gst_buffer_unref (buffer);
}
}
}
bIsFrameNew = bHavePixelsChanged;
bHavePixelsChanged = false;
}
void ofGstUtils::gstHandleMessage(){
GstBus *bus = gst_pipeline_get_bus(GST_PIPELINE(gstPipeline));
while(gst_bus_have_pending(bus)) {
GstMessage* msg = gst_bus_pop(bus);
ofLog(OF_LOG_VERBOSE,"GStreamer: Got %s message", GST_MESSAGE_TYPE_NAME(msg));
switch (GST_MESSAGE_TYPE (msg)) {
case GST_MESSAGE_BUFFERING:
gint pctBuffered;
gst_message_parse_buffering(msg,&pctBuffered);
ofLog(OF_LOG_VERBOSE,"GStreamer: buffering %i\%", pctBuffered);
if(bIsStream && !bLoaded){
ofGstDataLock(&gstData);
allocate();
ofGstDataUnlock(&gstData);
}
if(pctBuffered<100){
gst_element_set_state (gstPipeline, GST_STATE_PAUSED);
}else if(!bPaused){
gst_element_set_state (gstPipeline, GST_STATE_PLAYING);
}
break;
case GST_MESSAGE_DURATION:{
GstFormat format=GST_FORMAT_TIME;
//if(!
gst_element_query_duration(gstPipeline,&format,&durationNanos);
// )
//ofLog(OF_LOG_WARNING,"GStreamer: cannot query duration");
}break;
case GST_MESSAGE_STATE_CHANGED:{
GstState oldstate, newstate, pendstate;
gst_message_parse_state_changed(msg, &oldstate, &newstate, &pendstate);
if(!bLoaded){
ofGstDataLock(&gstData);
allocate();
ofGstDataUnlock(&gstData);
}
gstData.pipelineState=newstate;
/*seek_lock();
if(posChangingPaused && newstate==GST_STATE_PLAYING){
gst_element_set_state (gstPipeline, GST_STATE_PAUSED);
posChangingPaused=false;
}
seek_unlock();*/
ofLog(OF_LOG_VERBOSE,"GStreamer: state changed from " + getName(oldstate) + " to " + getName(newstate) + " (" + getName(pendstate) + ")");
}break;
case GST_MESSAGE_ASYNC_DONE:
gstData.speed=speed;
ofLog(OF_LOG_VERBOSE,"GStreamer: async done");
break;
case GST_MESSAGE_ERROR: {
GError *err;
gchar *debug;
gst_message_parse_error(msg, &err, &debug);
ofLog(OF_LOG_ERROR, "GStreamer Plugin: Embedded video playback halted; module %s reported: %s",
gst_element_get_name(GST_MESSAGE_SRC (msg)), err->message);
g_error_free(err);
g_free(debug);
gst_element_set_state(GST_ELEMENT(gstPipeline), GST_STATE_NULL);
}break;
case GST_MESSAGE_EOS:
ofLog(OF_LOG_VERBOSE,"GStreamer: end of the stream.");
bIsMovieDone = true;
switch(loopMode){
case OF_LOOP_NORMAL:{
GstFormat format = GST_FORMAT_TIME;
GstSeekFlags flags = (GstSeekFlags) (GST_SEEK_FLAG_FLUSH |GST_SEEK_FLAG_KEY_UNIT);
gint64 pos;
gst_element_query_position(GST_ELEMENT(gstPipeline),&format,&pos);
float loopSpeed;
if(pos>0)
loopSpeed=-speed;
else
loopSpeed=speed;
if(!gst_element_seek(GST_ELEMENT(gstPipeline),
speed,
format,
flags,
GST_SEEK_TYPE_SET,
0,
GST_SEEK_TYPE_SET,
durationNanos)) {
ofLog(OF_LOG_WARNING,"GStreamer: unable to seek");
}
}break;
case OF_LOOP_PALINDROME:{
GstFormat format = GST_FORMAT_TIME;
GstSeekFlags flags = (GstSeekFlags) (GST_SEEK_FLAG_FLUSH |GST_SEEK_FLAG_KEY_UNIT);
gint64 pos;
gst_element_query_position(GST_ELEMENT(gstPipeline),&format,&pos);
float loopSpeed;
if(pos>0)
loopSpeed=-speed;
else
loopSpeed=speed;
if(!gst_element_seek(GST_ELEMENT(gstPipeline),
loopSpeed,
GST_FORMAT_UNDEFINED,
flags,
GST_SEEK_TYPE_NONE,
0,
GST_SEEK_TYPE_NONE,
0)) {
ofLog(OF_LOG_WARNING,"GStreamer: unable to seek");
}
}break;
}
break;
default:
ofLog(OF_LOG_VERBOSE,"GStreamer: unhandled message");
break;
}
gst_message_unref(msg);
}
gst_object_unref(GST_OBJECT(bus));
}
