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gmyth-stream/gmemcoder/src/gmencoder.c
author rosfran
Wed Apr 25 21:31:00 2007 +0100 (2007-04-25)
branchtrunk
changeset 596 2097ef19ce9a
child 600 7da2a5e32fa6
permissions -rw-r--r--
[svn r602] Test scripts variable clean-up. 
     1 #ifdef HAVE_CONFIG_H

     2 #include "config.h"

     3 #endif

     4 

     5 #include <glib.h>

     6 #include <gst/gst.h>

     7 #include <string.h>

     8 

     9 #include "gmencoder.h"

    10 

    11 #define G_MENCODER_GET_PRIVATE(obj) \

    12     (G_TYPE_INSTANCE_GET_PRIVATE ((obj), G_TYPE_MENCODER, GMencoderPrivate))

    13 

    14 

    15 typedef struct _GMencoderPrivate GMencoderPrivate;

    16 

    17 struct _GMencoderPrivate

    18 {    

    19 	GstElement *pipe;

    20 	GstElement *abin;

    21 	GstElement *vbin;

    22 	GstElement *sink;

    23 	gboolean ready;

    24 };

    25 

    26 enum {

    27   READY,

    28   PAUSED,

    29   PLAYING,

    30   STOPED,

    31   EOS,

    32   ERROR,

    33   LAST_SIGNAL

    34 };

    35 

    36 static void g_mencoder_class_init       (GMencoderClass *klass);

    37 static void g_mencoder_init             (GMencoder *object);

    38 static void g_mencoder_dispose  	    (GObject *object);

    39 static void g_mencoder_finalize 	    (GObject *object);

    40 static GstElement*

    41             _create_audio_bin           (GMencoder *self,

    42                                         const gchar* encode,

    43                                         gchar** encode_prop,

    44                                         gint rate);

    45 static GstElement*

    46             _create_video_bin           (GMencoder* self, 

    47                                         const gchar* encode,

    48                                         gchar** encode_prop,

    49                                         gdouble fps,

    50                                         gint rate,

    51                                         guint width, 

    52                                         guint height);

    53 

    54 static gboolean 

    55             _pipeline_bus_cb            (GstBus     *bus,

    56 		                                 GstMessage *msg,

    57 		                                 gpointer    user_data);

    58 static void _decodebin_new_pad_cb 		(GstElement* object,

    59 				                         GstPad* pad,

    60 				                         gboolean flag,

    61 				                         gpointer user_data);

    62 static void  _decodebin_unknown_type_cb (GstElement* object,

    63 		                         	     GstPad* pad,

    64                                          GstCaps* caps,

    65                                          gpointer user_data);

    66 

    67 

    68 static guint g_mencoder_signals[LAST_SIGNAL] = { 0 };

    69 

    70 G_DEFINE_TYPE(GMencoder, g_mencoder, G_TYPE_OBJECT)

    71 

    72 static void

    73 g_mencoder_class_init (GMencoderClass *klass)

    74 {   

    75 	GObjectClass *object_class;

    76 

    77 	object_class = (GObjectClass *) klass;

    78 

    79 	g_type_class_add_private (klass, sizeof (GMencoderPrivate));

    80         

    81 	object_class->dispose  = g_mencoder_dispose;

    82 	object_class->finalize = g_mencoder_finalize;	

    83 	

    84     g_mencoder_signals[READY] =

    85         g_signal_new ("ready",

    86     		  G_OBJECT_CLASS_TYPE (object_class),

    87     		  G_SIGNAL_RUN_FIRST,

    88     		  0, NULL, NULL,

    89     		  g_cclosure_marshal_VOID__VOID,

    90     		  G_TYPE_NONE, 0);

    91 

    92     g_mencoder_signals[PAUSED] =

    93         g_signal_new ("paused",

    94     		  G_OBJECT_CLASS_TYPE (object_class),

    95     		  G_SIGNAL_RUN_FIRST,

    96     		  0, NULL, NULL,

    97     		  g_cclosure_marshal_VOID__VOID,

    98     		  G_TYPE_NONE, 0);

    99     		  

   100     g_mencoder_signals[PLAYING] =

   101         g_signal_new ("playing",

   102     		  G_OBJECT_CLASS_TYPE (object_class),

   103     		  G_SIGNAL_RUN_FIRST,

   104     		  0, NULL, NULL,

   105               g_cclosure_marshal_VOID__VOID,

   106     		  G_TYPE_NONE, 0);

   107 

   108     g_mencoder_signals[STOPED] =

   109         g_signal_new ("stoped",

   110     		  G_OBJECT_CLASS_TYPE (object_class),

   111     		  G_SIGNAL_RUN_FIRST,

   112     		  0, NULL, NULL,

   113     		  g_cclosure_marshal_VOID__VOID,

   114     		  G_TYPE_NONE, 0);

   115 

   116     g_mencoder_signals[EOS] =

   117         g_signal_new ("eos",

   118     		  G_OBJECT_CLASS_TYPE (object_class),

   119     		  G_SIGNAL_RUN_FIRST,

   120     		  0, NULL, NULL,

   121     		  g_cclosure_marshal_VOID__VOID,

   122     		  G_TYPE_NONE, 0);

   123     		  

   124     		  

   125     g_mencoder_signals[ERROR] =

   126         g_signal_new ("error",

   127     		  G_OBJECT_CLASS_TYPE (object_class),

   128     		  G_SIGNAL_RUN_FIRST,

   129     		  0, NULL, NULL,

   130     		  g_cclosure_marshal_VOID__STRING,

   131     		  G_TYPE_NONE, 1, G_TYPE_STRING);	

   132 }

   133 

   134 static void

   135 g_mencoder_init (GMencoder *self)

   136 {

   137 }

   138 

   139 static void 

   140 g_mencoder_dispose (GObject *object)

   141 {

   142 }

   143 

   144 static void 

   145 g_mencoder_finalize (GObject *object)

   146 {

   147 	g_mencoder_close_stream (G_MENCODER (object));

   148 }

   149 

   150 GMencoder*  

   151 g_mencoder_new (void)

   152 {

   153     return g_object_new (G_TYPE_MENCODER, NULL);

   154 }

   155 

   156 static void

   157 _obj_set_prop (GObject *obj, 

   158                 const gchar *prop_name,

   159                 const gchar *prop_val)

   160 {

   161     GValue p = {0};

   162     GValue v = {0};

   163     GParamSpec *s = NULL;

   164     GObjectClass *k = G_OBJECT_GET_CLASS (obj);

   165 

   166 

   167     g_value_init (&v, G_TYPE_STRING);

   168     g_value_set_string (&v, prop_val);

   169 

   170     g_debug ("PROP [%s] VAL [%s]", prop_name, prop_val);

   171 

   172     s = g_object_class_find_property (k, prop_name);

   173     if (s == NULL) {

   174         g_print ("Invalid property name: %s\n", prop_name);

   175         return;

   176     }

   177 

   178     g_value_init (&p, s->value_type);

   179     switch (s->value_type) 

   180     {

   181         case G_TYPE_INT:

   182             g_value_set_int (&p, atoi (prop_val));

   183             break;

   184         case G_TYPE_STRING:

   185             g_value_set_string (&p, prop_val);

   186             break;

   187         default:

   188             return;

   189     }

   190        

   191     g_object_set_property (obj, prop_name, &p);

   192     g_value_unset (&v);

   193     g_value_unset (&p);

   194 }

   195 

   196 static GstElement*

   197 _create_element_with_prop (const gchar* factory_name,

   198                             const gchar* element_name,

   199                             gchar** prop)

   200 {

   201     GstElement *ret;

   202     int i;

   203 

   204 

   205     g_debug ("SET OBJ [%s]", factory_name);

   206     ret = gst_element_factory_make (factory_name, element_name);

   207     if (ret == NULL)

   208         return NULL;

   209 

   210     if (prop != NULL) {

   211         for (i=0; i < g_strv_length (prop); i++) {

   212             char** v = g_strsplit(prop[i], "=", 2);

   213             if (g_strv_length (v) == 2) {

   214                 _obj_set_prop (G_OBJECT (ret), v[0], v[1]);

   215             }

   216             g_strfreev (v);

   217         }

   218     }

   219 

   220     return ret;

   221 

   222 }

   223 

   224 static GstElement*

   225 _create_audio_bin (GMencoder* self,

   226                     const gchar* encode,

   227                     gchar** encode_prop,

   228                     gint rate)

   229 {

   230     GstElement *abin = NULL;

   231     GstElement *aqueue = NULL;

   232     GstElement *aconvert = NULL;

   233     GstElement *aencode = NULL;

   234     GstElement *aqueue_src = NULL;

   235     GstPad *apad = NULL;

   236 

   237     //audio/x-raw-int ! queue ! audioconvert ! faac ! rtpmp4gpay !  udpsink name=upd_audio host=224.0.0.1 port=5002	

   238 	abin 	= gst_bin_new ("abin");

   239 	aqueue	= gst_element_factory_make ("queue", "aqueue");

   240 	aconvert= gst_element_factory_make ("audioconvert", "aconvert");

   241 	aencode = _create_element_with_prop ((encode ? encode : "lame"), "aencode", encode_prop);

   242 	aqueue_src= gst_element_factory_make ("queue", "aqueue_src");	

   243 

   244 	if ((abin == NULL) || (aqueue == NULL) || (aconvert == NULL) 

   245 		|| (aencode == NULL) || (aqueue_src == NULL)) {

   246 		g_warning ("Audio elements not found");

   247 		goto error;

   248 	}

   249 

   250 	gst_bin_add_many (GST_BIN (abin), aqueue, aconvert, aencode, aqueue_src, NULL);

   251 	gst_element_link_many (aqueue, aconvert, aencode, aqueue_src, NULL);

   252 

   253     //TODO: apply audio rate 

   254 

   255 	// ghost pad the audio bin

   256    	apad = gst_element_get_pad (aqueue, "sink");

   257    	gst_element_add_pad (abin, gst_ghost_pad_new("sink", apad));

   258 	gst_object_unref (apad);

   259 	

   260    	apad = gst_element_get_pad (aqueue_src, "src");

   261    	gst_element_add_pad (abin, gst_ghost_pad_new("src", apad));

   262     gst_object_unref (apad);

   263 

   264     return abin;

   265 error:

   266    	if (abin != NULL)

   267 		gst_object_unref (abin);

   268 

   269 	if (aqueue != NULL)

   270 		gst_object_unref (aqueue);

   271 

   272 	if (aconvert != NULL)

   273 		gst_object_unref (aconvert);

   274 

   275 	if (aencode != NULL)

   276 		gst_object_unref (aencode);

   277 

   278 	if (aqueue_src != NULL)

   279 		gst_object_unref (aqueue_src);

   280 

   281     if (apad != NULL)

   282         gst_object_unref (apad);

   283 

   284     return NULL;

   285 }

   286 

   287 

   288 

   289 

   290 //queue ! videoscale ! video/x-raw-yuv,width=240,height=144 ! colorspace ! rate ! encode ! queue

   291 static GstElement*

   292 _create_video_bin (GMencoder* self, 

   293                     const gchar* encode,

   294                     gchar** encode_prop,

   295                     gdouble fps,

   296                     gint rate,

   297                     guint width, 

   298                     guint height)

   299 {

   300     GstElement *vbin = NULL;

   301     GstElement *vqueue = NULL;

   302     GstElement* vqueue_src = NULL;

   303     GstElement *vcolorspace = NULL;

   304     GstElement *vencode = NULL;

   305     GstElement *vrate = NULL;

   306     GstPad *vpad = NULL;

   307 

   308 	vbin    = gst_bin_new ("vbin");

   309 	vqueue	= gst_element_factory_make ("queue", "vqueue");

   310 	vcolorspace = gst_element_factory_make ("ffmpegcolorspace", "colorspace");

   311 	vencode = _create_element_with_prop ((encode ? encode : "ffenc_mpeg1video"), "vencode", encode_prop);

   312     vrate   = gst_element_factory_make ("videorate", "vrate");

   313 	vqueue_src = gst_element_factory_make ("queue", "queue_src");

   314 

   315 	if ((vbin == NULL) || (vqueue == NULL) || (vcolorspace == NULL) 

   316 		|| (vencode == NULL) || (vqueue_src == NULL)) {

   317 		g_warning ("Video elements not found");

   318 		goto error;

   319 	}

   320 		

   321 	gst_bin_add_many (GST_BIN (vbin), vqueue, vcolorspace, vencode, vqueue_src, NULL);

   322 

   323 	

   324     if ((width > 0) && (height > 0)) {        

   325         //Scalling video

   326         GstCaps *vcaps;

   327 	    GstElement *vscale  = gst_element_factory_make ("videoscale", "vscale");

   328 

   329         gst_bin_add (GST_BIN (vbin), vscale);

   330 

   331         vcaps = gst_caps_new_simple ("video/x-raw-yuv",

   332                            "width", G_TYPE_INT, width,

   333                            "height", G_TYPE_INT, height,                           

   334                            NULL);

   335 

   336         gst_element_link (vqueue, vscale);

   337 					   	

   338         if (gst_element_link_filtered (vscale, vcolorspace, vcaps) == FALSE) {

   339             g_warning ("Fail to resize video");

   340             gst_object_unref (vcaps);

   341             gst_object_unref (vscale);

   342             goto error;

   343         }

   344         gst_caps_unref (vcaps);

   345     } else {

   346         gst_element_link (vqueue, vcolorspace);

   347     }

   348 

   349     if (fps > 0) {

   350         //Changing the video fps

   351         GstCaps *vcaps;

   352 

   353         gst_bin_add (GST_BIN (vbin), vrate);

   354 

   355     	if (gst_element_link (vcolorspace, vrate) == FALSE) {

   356 	        g_warning ("Fail to link video elements");

   357 	        goto error;

   358     	}

   359 

   360     	vcaps = gst_caps_new_simple ("video/x-raw-yuv",

   361 					   "framerate", GST_TYPE_FRACTION, (int) (fps * 1000), 1000, NULL);

   362 

   363         if (gst_element_link_filtered (vrate, vencode, vcaps) == FALSE) { 

   364            g_warning ("Fail to link vrate with vencode.");

   365            goto error;

   366         }

   367         gst_caps_unref (vcaps);

   368     } else {

   369         if (gst_element_link (vcolorspace, vencode) == FALSE) {

   370             g_warning ("Fail to link colorspace and video encode element.");

   371             goto error;

   372         }

   373     }

   374 

   375     

   376     gst_element_link (vencode, vqueue_src);

   377 

   378 	// ghost pad the video  bin

   379    	vpad = gst_element_get_pad (vqueue, "sink");

   380    	gst_element_add_pad (vbin, gst_ghost_pad_new ("sink", vpad));	

   381 	gst_object_unref (vpad);

   382 	

   383    	vpad = gst_element_get_pad (vqueue_src, "src");

   384    	gst_element_add_pad (vbin, gst_ghost_pad_new ("src", vpad));	

   385 	gst_object_unref (vpad);

   386 

   387     return vbin;

   388 

   389 error:

   390     if (vpad != NULL)

   391         gst_object_unref (vpad);

   392 

   393 	if (vbin != NULL)

   394 		gst_object_unref (vbin);

   395 

   396 	if (vqueue != NULL)

   397 		gst_object_unref (vqueue);

   398 

   399 	if (vencode != NULL)

   400 		gst_object_unref (vencode);

   401 

   402 	if (vqueue_src != NULL)

   403 		gst_object_unref (vqueue_src);

   404 

   405     if (vcolorspace != NULL)

   406         gst_object_unref (vcolorspace);

   407 

   408     return NULL;

   409 }

   410 

   411 

   412 gboolean

   413 g_mencoder_setup_stream (GMencoder *self, 

   414                          const gchar* uri, 

   415                          const gchar* video_encode,

   416                          gchar** video_encode_prop,

   417                          gdouble video_fps,

   418                          gdouble video_rate,

   419                          guint video_width, 

   420                          guint video_height,

   421                          const gchar* audio_encode,

   422                          gchar** audio_encode_prop,

   423                          guint audio_rate,

   424                          const gchar* sink_name,

   425                          gchar** sink_prop)

   426 {

   427 	GstBus *bus = NULL;

   428 	GstElement *pipe = NULL;

   429 	GstElement *fdsink = NULL;

   430     GstElement *mux = NULL;

   431     GstElement *decode = NULL;

   432 	GstElement *src = NULL;

   433     GstElement *abin = NULL;

   434     GstElement *vbin = NULL;

   435     GstPad *aux_pad = NULL;

   436     GstPad *mux_pad = NULL;

   437 

   438 	GMencoderPrivate *priv = G_MENCODER_GET_PRIVATE (self);

   439 

   440 	pipe = gst_pipeline_new ("pipe");

   441 	src = gst_element_make_from_uri (GST_URI_SRC, uri, "src");

   442 	if (src == NULL) 

   443 		goto error;

   444 

   445 	decode = gst_element_factory_make ("decodebin2", "decode");

   446 	if (decode == NULL) 

   447 		goto error;

   448 

   449     mux = gst_element_factory_make ("ffmux_mpeg", "mux");

   450     if (mux == NULL)

   451         goto error;

   452 

   453     fdsink = _create_element_with_prop (sink_name, "sink", sink_prop);

   454     if (fdsink == NULL)

   455         goto error;

   456 

   457     abin = _create_audio_bin (self, audio_encode, audio_encode_prop, audio_rate);

   458     if (abin == NULL)

   459         goto error;

   460 

   461     vbin = _create_video_bin (self, video_encode, video_encode_prop, video_fps, video_rate, video_width, video_height);

   462     if (vbin == NULL)

   463         goto error;

   464 

   465 	// Finish Pipe

   466     gst_bin_add_many (GST_BIN (pipe), src, decode, abin, vbin, mux, fdsink, NULL);

   467 	gst_element_link (src, decode);

   468 

   469     //Link bins with mux

   470     aux_pad = gst_element_get_pad (abin, "src");

   471     mux_pad = gst_element_get_pad (mux, "audio_0");

   472     GstPadLinkReturn ret = gst_pad_link (aux_pad, mux_pad);

   473     if (ret != GST_PAD_LINK_OK) {

   474         g_warning ("Fail link audio and mux: %d", ret);

   475         goto error;

   476    

   477     }

   478 	gst_object_unref (aux_pad);

   479     gst_object_unref (mux_pad);

   480 

   481     aux_pad = gst_element_get_pad (vbin, "src");

   482     mux_pad = gst_element_get_pad (mux, "video_0");

   483     ret = gst_pad_link (aux_pad, mux_pad);

   484     if (ret != GST_PAD_LINK_OK) {

   485         g_warning ("Fail link video and mux: %d", ret);

   486         goto error;

   487     }

   488     gst_object_unref (aux_pad);

   489     gst_object_unref (mux_pad);

   490     aux_pad = NULL;

   491     mux_pad = NULL;

   492 

   493     //Link mux with sink

   494     gst_element_link (mux, fdsink);

   495 

   496 	g_signal_connect (G_OBJECT (decode), 

   497 				"new-decoded-pad",

   498 				G_CALLBACK (_decodebin_new_pad_cb),

   499 				self);

   500 	

   501 	g_signal_connect (G_OBJECT (decode),

   502 				"unknown-type",

   503 				G_CALLBACK (_decodebin_unknown_type_cb),

   504 				self);

   505 

   506 

   507 	bus = gst_pipeline_get_bus (GST_PIPELINE (pipe));

   508 	gst_bus_add_watch (bus, _pipeline_bus_cb, self);

   509 	gst_object_unref (bus);

   510 

   511 

   512 	priv->pipe = pipe;

   513 	priv->abin = abin;

   514 	priv->vbin = vbin;

   515 	priv->sink = fdsink;

   516 	priv->ready = FALSE;

   517 	

   518 	gst_element_set_state (pipe, GST_STATE_PAUSED);	   	

   519 	return  TRUE;

   520 	

   521 error:

   522 	g_warning ("Invalid uri");

   523 

   524 	if (pipe != NULL) {

   525 		gst_object_unref (pipe);

   526     }

   527 

   528 	if (src != NULL) {

   529 		gst_object_unref (src);

   530     }

   531 

   532     if (mux != NULL) {

   533         gst_object_unref (mux);

   534     }

   535 

   536     if (mux_pad != NULL) {

   537         gst_object_unref (mux_pad);

   538     }

   539 

   540     if (aux_pad != NULL) {

   541         gst_object_unref (mux_pad);

   542     }

   543 

   544 	if (fdsink != NULL) {

   545 		gst_object_unref (fdsink);

   546     }

   547 

   548     if (abin != NULL) {

   549         gst_object_unref (abin);

   550     }

   551 

   552     if (vbin != NULL) {

   553         gst_object_unref (vbin);

   554     }

   555 

   556 	return FALSE;

   557 }

   558 

   559 gboolean 

   560 g_mencoder_play_stream (GMencoder *self)

   561 {

   562     GMencoderPrivate *priv = G_MENCODER_GET_PRIVATE (self);

   563 

   564     g_return_val_if_fail (priv->ready == TRUE, FALSE);

   565     

   566     if (gst_element_set_state (priv->pipe, GST_STATE_PLAYING) != GST_STATE_CHANGE_FAILURE) {

   567 			g_debug ("PLAYING");

   568 			return TRUE;

   569 	}

   570 	return FALSE;

   571 }

   572 

   573 gboolean

   574 g_mencoder_pause_stream (GMencoder *self)

   575 {

   576     GMencoderPrivate *priv = G_MENCODER_GET_PRIVATE (self);

   577 

   578     g_return_val_if_fail (priv->ready == TRUE, FALSE);

   579     

   580     if (gst_element_set_state (priv->pipe, GST_STATE_PAUSED) != GST_STATE_CHANGE_FAILURE) {

   581 			g_debug ("PAUSED");

   582 			return TRUE;

   583 	}

   584 	return FALSE;

   585 }

   586 

   587 void

   588 g_mencoder_close_stream (GMencoder *self)

   589 {

   590 

   591     GMencoderPrivate *priv = G_MENCODER_GET_PRIVATE (self);

   592 

   593     g_return_if_fail (priv->ready == TRUE);

   594     

   595     gst_element_set_state (priv->pipe, GST_STATE_NULL);

   596     gst_object_unref (priv->pipe);

   597     priv->pipe = NULL;

   598     priv->abin = NULL;

   599     priv->vbin = NULL;

   600     priv->sink = NULL;

   601     priv->ready = FALSE;

   602 }

   603 

   604 static gboolean

   605 _pipeline_bus_cb (GstBus     *bus,

   606 		  GstMessage *msg,

   607 		  gpointer    user_data)

   608 {

   609 	switch (GST_MESSAGE_TYPE (msg)) 

   610 	{

   611 		case GST_MESSAGE_STATE_CHANGED:

   612 		{

   613 			GstState oldstate;

   614 			GstState newstate;

   615 			GstState pendingstate;

   616 

   617 			GMencoderPrivate *priv = G_MENCODER_GET_PRIVATE (user_data);

   618 

   619 			gst_message_parse_state_changed (msg, &oldstate,

   620 				&newstate, &pendingstate);

   621 

   622             if (pendingstate != GST_STATE_VOID_PENDING)

   623                 break;

   624 

   625             if ((oldstate == GST_STATE_READY) && 

   626                 (newstate == GST_STATE_PAUSED)) {

   627                     if (priv->ready) 

   628                         g_signal_emit (user_data, g_mencoder_signals[PAUSED], 0);

   629                     else {

   630                         priv->ready = TRUE;

   631                         g_signal_emit (user_data, g_mencoder_signals[READY], 0);

   632                     }

   633             } else if ((oldstate == GST_STATE_PAUSED) &&

   634                        (newstate == GST_STATE_PLAYING)) {

   635                         g_signal_emit (user_data, g_mencoder_signals[PLAYING], 0);

   636             } else if ((oldstate == GST_STATE_READY) &&

   637                        (newstate == GST_STATE_NULL)) {

   638                         g_signal_emit (user_data, g_mencoder_signals[STOPED], 0);

   639             }			

   640             break;

   641 		}

   642 		case GST_MESSAGE_ERROR: 

   643 		{

   644 		    GError *error;

   645 		    gchar *debug;

   646 		    gchar *err_str;

   647 		    

   648 		    gst_message_parse_error (msg, &error, &debug);

   649 		    err_str = g_strdup_printf ("Error [%d] %s (%s)", error->code,

   650 		        error->message,

   651 		        debug);

   652 		    g_signal_emit (user_data, g_mencoder_signals[ERROR], 0, err_str);

   653 		    g_free (err_str);

   654 		    g_clear_error (&error);

   655 		    g_free (debug);

   656 		    break;

   657 		}

   658 		

   659 		case GST_MESSAGE_EOS:

   660 		    g_signal_emit (user_data, g_mencoder_signals[EOS], 0);

   661 		    break;		

   662 		default:

   663 			break;

   664 	}

   665 	return TRUE;

   666 }

   667 

   668 static void 

   669 _decodebin_new_pad_cb (GstElement* object,

   670                        GstPad* pad,

   671                        gboolean flag,

   672                        gpointer user_data)

   673 {

   674 	GstCaps *caps;

   675 	gchar *str_caps = NULL;

   676     GMencoderPrivate *priv = G_MENCODER_GET_PRIVATE (user_data);

   677 

   678 	caps = gst_pad_get_caps (pad);

   679 	str_caps = gst_caps_to_string (caps);

   680     g_debug ("CAPS : %s", str_caps);

   681 

   682 	if (strstr (str_caps, "audio") != NULL) {

   683 		GstPad *apad = gst_element_get_pad (priv->abin, "sink");

   684 		gst_pad_link (pad, apad);

   685 		gst_object_unref (apad);

   686 	} else if (strstr (str_caps, "video") != NULL) {

   687 		GstPad *vpad = gst_element_get_pad (priv->vbin, "sink");

   688 		gst_pad_link (pad, vpad);

   689 		gst_object_unref (vpad);

   690 	} else {

   691 		g_warning ("invalid caps %s", str_caps);

   692 	}

   693 

   694 	g_free (str_caps);

   695 	gst_caps_unref (caps);

   696 }

   697 

   698 static void 

   699 _decodebin_unknown_type_cb (GstElement* object,

   700                             GstPad* pad,

   701                             GstCaps* caps,

   702                             gpointer user_data)

   703 {

   704     g_warning  ("Unknown Type");

   705 }
gmyth