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#include "gstvideoloader.h"
#include <gst/gst.h>
#include <gst/app/gstappsink.h>
#include <gst/video/video.h>
#include <glib-object.h>
#include <glib.h>
#include <algorithm>
using namespace std;
void ofGstUtils::startGstMainLoop(){
static bool initialized = false;
if(!initialized){
g_main_loop_new (NULL, FALSE);
initialized=true;
}
}
//-------------------------------------------------
//----------------------------------------- gstUtils
//-------------------------------------------------
static bool plugin_registered = false;
static bool gst_inited = false;
// called when the appsink notifies us that there is a new buffer ready for
// processing
static GstFlowReturn on_new_buffer_from_source (GstAppSink * elt, void * data){
GstBuffer *buffer = gst_app_sink_pull_buffer (GST_APP_SINK (elt));
return ((ofGstUtils*)data)->buffer_cb(buffer);
}
static GstFlowReturn on_new_preroll_from_source (GstAppSink * elt, void * data){
GstBuffer *buffer = gst_app_sink_pull_preroll(GST_APP_SINK (elt));
return ((ofGstUtils*)data)->preroll_cb(buffer);
}
static void on_eos_from_source (GstAppSink * elt, void * data){
((ofGstUtils*)data)->eos_cb();
}
static gboolean appsink_plugin_init (GstPlugin * plugin)
{
gst_element_register (plugin, "appsink", GST_RANK_NONE, GST_TYPE_APP_SINK);
return TRUE;
}
ofGstUtils::ofGstUtils() {
bLoaded = false;
speed = 1;
bPaused = false;
bIsMovieDone = false;
bPlaying = false;
loopMode = OF_LOOP_NONE;
bFrameByFrame = false;
gstPipeline = NULL;
gstSink = NULL;
durationNanos = 0;
isAppSink = false;
isStream = false;
appsink = NULL;
if(!g_thread_supported()){
g_thread_init(NULL);
}
if(!gst_inited){
gst_init (NULL, NULL);
gst_inited=true;
cerr <<"ofGstUtils: gstreamer inited"<<endl;
}
if(!plugin_registered){
gst_plugin_register_static(GST_VERSION_MAJOR, GST_VERSION_MINOR,
"appsink", (char*)"Element application sink",
appsink_plugin_init, "0.1", "LGPL", "ofVideoPlayer", "openFrameworks",
"http://openframeworks.cc/");
plugin_registered=true;
}
}
ofGstUtils::~ofGstUtils() {
close();
}
GstFlowReturn ofGstUtils::preroll_cb(GstBuffer * buffer){
bIsMovieDone = false;
if(appsink) return appsink->on_preroll(buffer);
else return GST_FLOW_OK;
}
GstFlowReturn ofGstUtils::buffer_cb(GstBuffer * buffer){
bIsMovieDone = false;
if(appsink) return appsink->on_buffer(buffer);
else return GST_FLOW_OK;
}
void ofGstUtils::eos_cb(){
bIsMovieDone = true;
if(appsink) appsink->on_eos();
}
bool ofGstUtils::setPipelineWithSink(string pipeline, string sinkname, bool isStream){
ofGstUtils::startGstMainLoop();
gchar* pipeline_string =
g_strdup((pipeline).c_str());
GError * error = NULL;
gstPipeline = gst_parse_launch (pipeline_string, &error);
cerr << "gstreamer pipeline: " <<pipeline_string<<endl;
if(error!=NULL){
cerr <<"couldnt create pipeline: " << string(error->message)<<endl;
return false;
}
gstSink = gst_bin_get_by_name(GST_BIN(gstPipeline),sinkname.c_str());
if(!gstSink){
cerr << "couldn't get sink from string pipeline"<<endl;
}
return setPipelineWithSink(gstPipeline,gstSink,isStream);
}
bool ofGstUtils::setPipelineWithSink(GstElement * pipeline, GstElement * sink, bool isStream_){
ofGstUtils::startGstMainLoop();
gstPipeline = pipeline;
gstSink = sink;
isStream = isStream_;
if(gstSink){
gst_base_sink_set_sync(GST_BASE_SINK(gstSink), true);
}
if(gstSink && string(gst_plugin_feature_get_name( GST_PLUGIN_FEATURE(gst_element_get_factory(gstSink))))=="appsink"){
isAppSink = true;
}else{
isAppSink = false;
}
return startPipeline();
}
void ofGstUtils::setFrameByFrame(bool _bFrameByFrame){
bFrameByFrame = _bFrameByFrame;
if(gstSink){
g_object_set (G_OBJECT (gstSink), "sync", !bFrameByFrame, (void*)NULL);
}
}
bool ofGstUtils::isFrameByFrame(){
return bFrameByFrame;
}
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