vpudec gsteamer C code

alokkumar — Thu, 04 Apr 2013 14:50:08 GMT

Dear All,

I am trying programmatic way of processing gsteamer pipeline and having trouble with using vpudec decoder.

I was earlier using decodebin2 in program below and it plays without any issues.But when I change this to vpudec it does not work at all. Any pointers are highly appreciated.

I have humble request for a quick response.

code:

#include<stdio.h>

#include<gst/gst.h>

#include<glib.h>

//Function to process message on bus of pipeline

gboolean process_message(GstBus *bus, GstMessage *msg,gpointer data);

//Function to add pad dynamically for ogg demux

void dynamic_addpad(GstElement *element, GstPad *pad, gpointer data);

void dynamic_decodepad (GstElement* object, GstPad* arg0, gboolean arg1,gpointer user_data);

GstElement *source, *demuxer, *audio_decoder, *video_decoder, *audio_convertor,*video_convertor, *audio_sink,*video_sink,*audioqueue,*videoqueue,*videoqueue2 ;//*audio_demuxer, *video_demuxer,

int main(int argc,char* argv[])

{

GstBin *Bin;

GstBus *bus;

GMainLoop *Mainloop;

gst_init (&argc,&argv);

Mainloop = g_main_loop_new(NULL,FALSE);//NULL to use the current context and False to tell its not in running state

GstElement *pipeline = gst_pipeline_new("PIPELINE");

Bin = GST_BIN(pipeline);

bus = gst_pipeline_get_bus(GST_PIPELINE(pipeline));

source = gst_element_factory_make("filesrc","file-source");

g_object_set(G_OBJECT(source),"location",argv[1],NULL);

demuxer = gst_element_factory_make("avidemux","avi-demuxer");

//audioqueue = gst_element_factory_make("queue","Queue for audio");

videoqueue = gst_element_factory_make("queue","Queue for video");

videoqueue2 = gst_element_factory_make("queue","Queue for video2");

//audio_decoder = gst_element_factory_make("decodebin2","a_decodebin");

video_decoder = gst_element_factory_make("decodebin2","decodebin2");//"Vorbis audio decoder","vorbis");

//audio_convertor = gst_element_factory_make("audioconvert","audio convertor");//"Audio converter","audioconvert");

video_convertor = gst_element_factory_make("videoscale","video convertor");//"Audio converter","audioconvert");

//audio_sink = gst_element_factory_make("autoaudiosink","Auto audio sink");

//video_sink = gst_element_factory_make("autovideosink","XV video sink ");

video_sink = gst_element_factory_make("mfw_isink","XV video sink ");

if(!source )

{ g_print("Could not not create element -1\n");

return 0;

}

if(!demuxer )

{ g_print("Could not not create element -2\n");

return 0;

}

#if 0

if(!audioqueue )

{ g_print("Could not not create element -3 \n");

return 0;

}

#endif

if(!videoqueue )

{ g_print("Could not not create element -4\n");

return 0;

}

if(!video_decoder )

{ g_print("Could not not create element -5\n");

return 0;

}

#if 0

if(!audio_convertor )

{ g_print("Could not not create element -6\n");

return 0;

}

#endif

if(!video_convertor )

{ g_print("Could not not create element -7 \n");

return 0;

}

#if 0

if(!audio_sink )

{ g_print("Could not not create element -8\n");

return 0;

}

#endif

if(!video_sink )

{ g_print("Could not not create element -9\n");

return 0;

}

if(!videoqueue2 )

{ g_print("Could not not create element -4\n");

return 0;

}

gst_bin_add(Bin,source);

//gst_bin_add_many(Bin,demuxer,audioqueue,videoqueue,audio_decoder,audio_convertor,video_decoder,video_convertor,audio_sink,video_sink,NULL);

gst_bin_add_many(Bin,demuxer,videoqueue,video_decoder,/*videoqueue2,*/ video_convertor,video_sink,NULL);

gst_element_link(source,demuxer);

gst_element_link(videoqueue,video_decoder);

gst_element_link(video_convertor,video_sink);

//gst_element_link_many(audioqueue,audio_decoder,NULL);

//gst_element_link_many(audio_convertor,audio_sink,NULL);

//gst_element_link_many(videoqueue,video_decoder,/*videoqueue2,*/video_convertor,video_sink,NULL);

//gst_element_link_many(video_convertor,video_sink,NULL);

g_signal_connect(demuxer,"pad-added",G_CALLBACK(dynamic_addpad),NULL);//demuxer and decoder are passed as instance and data as pads of both the elements are linked in dynamic_addpad

//g_signal_connect(audio_decoder,"new-decoded-pad",G_CALLBACK(dynamic_decodepad),NULL);//demuxer and decoder are passed as instance and data as pads of both the elements are linked in dynamic_addpad

g_signal_connect(video_decoder,"new-decoded-pad",G_CALLBACK(dynamic_decodepad),NULL);//demuxer and decoder are passed as instance and data as pads of both the elements are linked in dynamic_addpad

gst_bus_add_watch(bus,process_message,Mainloop); //Mainloop is passed as user data as in the process_message actions are taken on the loop

g_object_unref(bus);

g_print("In playing state\n");

gst_element_set_state(pipeline,GST_STATE_PLAYING);//Pipeline is also a bin and bin is also an element at abstract level and hence gst_element_set_state call is used to set state of pipeline.

g_main_loop_run(Mainloop);

g_print("In playing state2\n");

gst_element_set_state(pipeline,GST_STATE_NULL);

g_object_unref(G_OBJECT(pipeline));

}

//Function to process message on bus of pipeline

gboolean process_message(GstBus *bus, GstMessage *msg,gpointer data)

{

GError *error;

gchar *debug;

GMainLoop *loop = (GMainLoop *)data;

g_print(" In process message msg->type : %d\n",GST_MESSAGE_TYPE(msg));

switch(GST_MESSAGE_TYPE(msg))

{

case GST_MESSAGE_UNKNOWN :

g_print("GST_MESSAGE_UNKNOWN \n");

break;

case GST_MESSAGE_EOS :

g_print("GST_MESSAGE_EOS \n");

g_main_loop_quit(loop);

break;

case GST_MESSAGE_ERROR :

g_print("GST_MESSAGE_ERROR \n");

gst_message_parse_error (msg, &error, &debug);

g_free(debug);

//if(!error)

{

g_print("GST_MESSAGE_ERROR message : %s \n",error->message);

}

g_main_loop_quit(loop);

break;

case GST_MESSAGE_WARNING :

g_print("GST_MESSAGE_WARNING \n");

break;

case GST_MESSAGE_INFO :

g_print("GST_MESSAGE_INFO \n");

break;

case GST_MESSAGE_TAG :

g_print("GST_MESSAGE_TAG \n");

break;

case GST_MESSAGE_BUFFERING:

g_print("GST_MESSAGE_BUFFERING \n");

break;

case GST_MESSAGE_STATE_CHANGED:

g_print("GST_MESSAGE_STATE_CHANGED \n");

break;

default :

g_print("default \n");

break;

}

return TRUE; //returns true always as it has to be always registered returning false will deregister the function

}

//Function to add pad dynamically for ogg demux

void dynamic_addpad(GstElement *element, GstPad *pad, gpointer data)

{

char* pad_name = gst_pad_get_name(pad);

g_print(" In dynamic ADDING PAD %s\n", pad_name);

#if 0

if (g_str_has_prefix(pad_name,"audio")) {

GstPad *audiodemuxsink = gst_element_get_static_pad(audioqueue,"sink");

gst_pad_link(pad,audiodemuxsink );

}

#endif

if (g_str_has_prefix(pad_name,"video")) {

GstPad *videodemuxsink = gst_element_get_static_pad(videoqueue,"sink");

gst_pad_link(pad,videodemuxsink );

}

g_free (pad_name);

}

void dynamic_decodepad (GstElement* object, GstPad* pad, gboolean arg1,gpointer user_data)

{

GstPad* videoconvertsink = gst_element_get_static_pad(video_convertor,"sink");

if (gst_pad_can_link(pad,videoconvertsink)) {

gst_pad_link(pad,videoconvertsink);

}

#if 0

GstPad* audioconvertsink = gst_element_get_static_pad(audio_convertor,"sink");

if (gst_pad_can_link(pad,audioconvertsink)) {

gst_pad_link(pad,audioconvertsink);

}

#endif

}

Re: vpudec gsteamer C code

LeonardoSandova — Mon, 08 Apr 2013 15:28:05 GMT

Could you also post the error's log?

Can you try the both pipelines using gst-launch?

Leo

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Re: vpudec gsteamer C code