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#include <string>
#include <iostream>
#include <gst/gstpad.h>
#include "Pixels.h"
#include "ofUtils.h"
enum ofLoopType{
OF_LOOP_NONE=0x01,
OF_LOOP_PALINDROME=0x02,
OF_LOOP_NORMAL=0x03
};
class ofGstAppSink;
typedef struct _GstElement GstElement;
typedef struct _GstBuffer GstBuffer;
typedef struct _GstMessage GstMessage;
class ofGstUtils{
public:
ofGstUtils();
virtual ~ofGstUtils();
bool setPipelineWithSink(std::string pipeline, std::string sinkname="sink", bool isStream=false);
bool setPipelineWithSink(GstElement * pipeline, GstElement * sink, bool isStream=false);
void play();
void stop();
void setPaused(bool bPause);
bool isPaused(){return bPaused;}
bool isLoaded(){return bLoaded;}
bool isPlaying(){return bPlaying;}
float getPosition();
float getSpeed();
float getDuration();
int64_t getDurationNanos();
bool getIsMovieDone();
void setPosition(float pct);
void setVolume(float volume);
void setLoopState(ofLoopType state);
ofLoopType getLoopState(){return loopMode;}
void setSpeed(float speed);
void setFrameByFrame(bool bFrameByFrame);
bool isFrameByFrame();
GstElement * getPipeline();
GstElement * getSink();
unsigned long getMinLatencyNanos();
unsigned long getMaxLatencyNanos();
virtual void close();
void setSinkListener(ofGstAppSink * appsink);
// callbacks to get called from gstreamer
virtual GstFlowReturn preroll_cb(GstBuffer * buffer);
virtual GstFlowReturn buffer_cb(GstBuffer * buffer);
virtual void eos_cb();
static void startGstMainLoop();
void update();
protected:
ofGstAppSink * appsink;
bool isStream;
private:
void gstHandleMessage();
//void update(ofEventArgs & args);
bool startPipeline();
bool bPlaying;
bool bPaused;
bool bIsMovieDone;
bool bLoaded;
bool bFrameByFrame;
ofLoopType loopMode;
GstElement * gstSink;
GstElement * gstPipeline;
float speed;
int64_t durationNanos;
bool isAppSink;
};
class ofGstVideoUtils: public ofGstUtils{
public:
ofGstVideoUtils();
virtual ~ofGstVideoUtils();
bool setPipeline(std::string pipeline, int bpp=24, bool isStream=false, int w=-1, int h=-1);
bool allocate(int w, int h, int bpp);
bool isFrameNew();
unsigned char * getPixels();
//ofPixelsRef getPixelsRef();
float getHeight();
float getWidth();
void close();
void update();
protected:
GstFlowReturn preroll_cb(GstBuffer * buffer);
GstFlowReturn buffer_cb(GstBuffer * buffer);
void eos_cb();
Pixels pixels;
Pixels backPixels;
//ofPixels pixels; // 24 bit: rgb
//ofPixels backPixels;
//ofPixels eventPixels;
private:
bool bIsFrameNew; // if we are new
bool bHavePixelsChanged;
bool bBackPixelsChanged;
//ofMutex mutex;
GstBuffer * buffer, *prevBuffer;
};
//-------------------------------------------------
//----------------------------------------- appsink listener
//-------------------------------------------------
class ofGstAppSink{
public:
virtual GstFlowReturn on_preroll(GstBuffer * buffer){
return GST_FLOW_OK;
}
virtual GstFlowReturn on_buffer(GstBuffer * buffer){
return GST_FLOW_OK;
}
virtual void on_eos(){}
// return true to set the message as attended so upstream doesn't try to process it
virtual bool on_message(GstMessage* msg){return false;};
// pings when enough data has arrived to be able to get sink properties
virtual void on_stream_prepared(){};
};
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