khronosfws/openmax_al/src/gst_adaptation/xaplayitfadaptation.c
changeset 33 5e8b14bae8c3
parent 28 ebf79c79991a
child 36 73253677b50a
equal deleted inserted replaced
28:ebf79c79991a 33:5e8b14bae8c3
     1 /*
       
     2 * Copyright (c) 2009 Nokia Corporation and/or its subsidiary(-ies).
       
     3 * All rights reserved.
       
     4 * This component and the accompanying materials are made available
       
     5 * under the terms of "Eclipse Public License v1.0"
       
     6 * which accompanies this distribution, and is available
       
     7 * at the URL "http://www.eclipse.org/legal/epl-v10.html".
       
     8 *
       
     9 * Initial Contributors:
       
    10 * Nokia Corporation - initial contribution.
       
    11 *
       
    12 * Contributors:
       
    13 *
       
    14 * Description: 
       
    15 *
       
    16 */
       
    17 
       
    18 #include <gst/gst.h>
       
    19 #include "unistd.h"
       
    20 #include <pthread.h>
       
    21 #include "xamediaplayeradaptctx.h"
       
    22 #include "xaplayitfadaptation.h"
       
    23 #include "xaadaptationgst.h"
       
    24 #include "xacameraadaptctx.h"
       
    25 
       
    26 extern XAboolean cameraRealized;
       
    27 extern XACameraAdaptationCtx_* cameraCtx;
       
    28 
       
    29 /*forward declaration of position updater callback*/
       
    30 gboolean XAPlayItfAdapt_PositionUpdate(gpointer ctx);
       
    31 
       
    32 /*
       
    33  * XAresult XAPlayItfAdaptGST_SetPlayState(XAAdaptationGstCtx *bCtx, XAuint32 state)
       
    34  * Sets play state to GStreamer.
       
    35  * @param XAAdaptationGstCtx *bCtx - Adaptation context, this will be casted to correct type regarding to contextID
       
    36  * XAuint32 state - Play state to be set
       
    37  * @return XAresult ret - Success value
       
    38  */
       
    39 XAresult XAPlayItfAdaptGST_SetPlayState(XAAdaptationBaseCtx *ctx, XAuint32 state)
       
    40 {
       
    41     XAresult ret = XA_RESULT_SUCCESS;
       
    42     XAboolean requestStateChange = XA_BOOLEAN_FALSE;
       
    43     GstStateChangeReturn gstRet = GST_STATE_CHANGE_SUCCESS;
       
    44     XAMediaPlayerAdaptationCtx* mCtx = NULL;
       
    45     XAuint32 locType = 0;
       
    46     GstState gstOrigState = GST_STATE_PLAYING;
       
    47     XADataLocator_Address *address = NULL;
       
    48     XAboolean playing = XA_BOOLEAN_FALSE;
       
    49     XAAdaptationGstCtx *bCtx = (XAAdaptationGstCtx *)ctx;
       
    50 
       
    51     DEBUG_API_A1("->XAPlayItfAdaptGST_SetPlayState %s",PLAYSTATENAME(state));
       
    52 
       
    53     
       
    54     if(!bCtx || bCtx->baseObj.ctxId != XAMediaPlayerAdaptation)
       
    55     {
       
    56         DEBUG_ERR("XA_RESULT_PARAMETER_INVALID");
       
    57         return XA_RESULT_PARAMETER_INVALID;
       
    58     }
       
    59 
       
    60     mCtx = (XAMediaPlayerAdaptationCtx*) bCtx;
       
    61     switch ( state )
       
    62     {
       
    63         case XA_PLAYSTATE_STOPPED:
       
    64         {
       
    65            	if ( cameraCtx && cameraRealized && mCtx->isobjsrc && mCtx->source  )
       
    66 			{
       
    67 				cameraCtx->playing = XA_BOOLEAN_FALSE;
       
    68 				if(!cameraCtx->recording && !cameraCtx->snapshotting)
       
    69 				{
       
    70 					/* Future improvement: We could block MPObjSrc pad from tee-eleement here, when
       
    71 					 * tee-element supports sending stream to one pad when others are blocked */
       
    72 
       
    73 					/* Neither view finder or recorder is running -> pause camera */
       
    74 					if ( GST_STATE( GST_ELEMENT(mCtx->source)) == GST_STATE_PLAYING )
       
    75 					{
       
    76 						GstStateChangeReturn gret;
       
    77 						DEBUG_INFO("Stop camera source");
       
    78 						gret = gst_element_set_state( GST_ELEMENT(mCtx->source), GST_STATE_PAUSED );
       
    79 						if(gret == GST_STATE_CHANGE_SUCCESS)
       
    80 						    gret = gst_element_get_state( GST_ELEMENT(mCtx->source), NULL,NULL, XA_ADAPT_ASYNC_TIMEOUT_SHORT_NSEC );
       
    81 					}
       
    82 				}
       
    83 			}
       
    84 
       
    85             gstOrigState = GST_STATE(bCtx->bin);
       
    86             if ( gstOrigState != GST_STATE_READY )
       
    87             {
       
    88                 DEBUG_INFO("Set gst-bin to GST_STATE_READY");
       
    89                 bCtx->binWantedState = GST_STATE_READY;
       
    90                 XAAdaptationGst_PrepareAsyncWait(bCtx);
       
    91                 gstRet = gst_element_set_state( GST_ELEMENT(bCtx->bin), GST_STATE_READY);
       
    92                 switch ( gstRet )
       
    93                 {
       
    94                     case GST_STATE_CHANGE_FAILURE:
       
    95                         DEBUG_ERR_A1("FAILED to change state (target %s)",
       
    96                                       gst_element_state_get_name(bCtx->binWantedState));
       
    97                         bCtx->binWantedState = GST_STATE(bCtx->bin);
       
    98                         ret = XA_RESULT_INTERNAL_ERROR;
       
    99                         break;
       
   100                     case GST_STATE_CHANGE_ASYNC:
       
   101                         DEBUG_INFO_A1("Change state will happen asyncronously (target %s)",
       
   102                                        gst_element_state_get_name(bCtx->binWantedState));
       
   103                         XAAdaptationGst_StartAsyncWait(bCtx);
       
   104                         ret = XA_RESULT_SUCCESS;
       
   105                         break;
       
   106                     case GST_STATE_CHANGE_SUCCESS:
       
   107                         DEBUG_INFO_A1("Successfully changed state (target %s)",
       
   108                                        gst_element_state_get_name(bCtx->binWantedState));
       
   109                         break;
       
   110                     default:
       
   111                         DEBUG_ERR_A1("Unhandled error (%d)",gstRet);
       
   112                         break;
       
   113                 }
       
   114                 bCtx->waitingasyncop = XA_BOOLEAN_FALSE;
       
   115                 DEBUG_INFO_A1("Setted gst-bin to state %s", gst_element_state_get_name(GST_STATE(bCtx->bin)));
       
   116 
       
   117                 DEBUG_INFO_A1("Restoring gst-bin state to state %s", gst_element_state_get_name(gstOrigState));
       
   118                 bCtx->binWantedState = gstOrigState;
       
   119                 XAAdaptationGst_PrepareAsyncWait(bCtx);
       
   120                 gstRet = gst_element_set_state( GST_ELEMENT(bCtx->bin), gstOrigState);
       
   121                 switch ( gstRet )
       
   122                 {
       
   123                     case GST_STATE_CHANGE_FAILURE:
       
   124                         DEBUG_ERR_A1("FAILED to change state (target %s)",
       
   125                                       gst_element_state_get_name(bCtx->binWantedState));
       
   126                         bCtx->binWantedState = GST_STATE(bCtx->bin);
       
   127                         ret = XA_RESULT_INTERNAL_ERROR;
       
   128                         break;
       
   129                     case GST_STATE_CHANGE_ASYNC:
       
   130                         DEBUG_INFO_A1("Change state will happen asyncronously (target %s)",
       
   131                                        gst_element_state_get_name(bCtx->binWantedState));
       
   132                         XAAdaptationGst_StartAsyncWait(bCtx);
       
   133                         ret = XA_RESULT_SUCCESS;
       
   134                         break;
       
   135                     case GST_STATE_CHANGE_SUCCESS:
       
   136                         DEBUG_INFO_A1("Successfully changed state (target %s)",
       
   137                                        gst_element_state_get_name(bCtx->binWantedState));
       
   138                         break;
       
   139                     default:
       
   140                         DEBUG_ERR_A1("Unhandled error (%d)",gstRet);
       
   141                         break;
       
   142                 }
       
   143                 bCtx->waitingasyncop = XA_BOOLEAN_FALSE;
       
   144                 gstOrigState = GST_STATE(bCtx->bin);
       
   145                 DEBUG_INFO_A1("Restored gst-bin to state %s", gst_element_state_get_name(gstOrigState));
       
   146             }
       
   147 
       
   148 
       
   149 /*        	if( bCtx->pipeSrcThrCtx.dataHandle )
       
   150         	{
       
   151         		XAresult retVal = XA_RESULT_SUCCESS;
       
   152 				if ( bCtx->pipeSrcThrCtx.state != CPStateNull )
       
   153 				{
       
   154 					bCtx->pipeSrcThrCtx.state = CPStateStopped;
       
   155 				}
       
   156 
       
   157 				retVal = XAImpl_PostSemaphore( bCtx->pipeSrcThrCtx.stateSem );
       
   158 				if ( retVal != XA_RESULT_SUCCESS )
       
   159 				{
       
   160 					DEBUG_ERR("Could not post content pipe semaphore!");
       
   161 				}
       
   162 
       
   163         	}*/
       
   164             /* stop head and drive head to beginning */
       
   165             bCtx->binWantedState = GST_STATE_PAUSED;
       
   166             if(mCtx->runpositiontimer > 0)
       
   167             {
       
   168                 g_source_remove(mCtx->runpositiontimer);
       
   169                 mCtx->runpositiontimer=0;
       
   170             }
       
   171 
       
   172             gst_element_send_event(bCtx->bin,gst_event_new_flush_start());
       
   173             gst_element_send_event(bCtx->bin,gst_event_new_flush_stop());
       
   174 
       
   175             locType = *((XAuint32*)( mCtx->xaSource->pLocator ));
       
   176             if( locType == XA_DATALOCATOR_ADDRESS )
       
   177             {
       
   178                 address = (XADataLocator_Address*)(mCtx->xaSource->pLocator);
       
   179 
       
   180                 /* init gst buffer from datalocator */
       
   181                 if( mCtx->source )
       
   182                 {
       
   183                     GstBuffer* userBuf = NULL;
       
   184 
       
   185                     /* init GST buffer from XADataLocator*/
       
   186                     userBuf = gst_buffer_new();
       
   187                     if( userBuf )
       
   188                     {
       
   189                         userBuf->size = address->length;
       
   190                         userBuf->data = address->pAddress;
       
   191                         /* push the whole buffer to appsrc so it is ready for preroll */
       
   192                         DEBUG_INFO("Pushing buffer");
       
   193                         gst_app_src_push_buffer( GST_APP_SRC(mCtx->source), userBuf );
       
   194                         DEBUG_INFO_A1("Sent buffer at 0x%x to appsrc", userBuf );
       
   195                         gst_app_src_end_of_stream( GST_APP_SRC(mCtx->source) );
       
   196                     }
       
   197                     else
       
   198                     {
       
   199                         DEBUG_ERR("Failure allocating buffer!");
       
   200                     }
       
   201                 }
       
   202             }
       
   203             break;
       
   204         }
       
   205         case XA_PLAYSTATE_PAUSED:
       
   206 
       
   207            	if ( cameraCtx && cameraRealized && mCtx->isobjsrc && mCtx->source  )
       
   208 			{
       
   209 				cameraCtx->playing = XA_BOOLEAN_FALSE;
       
   210 
       
   211 				/* Future improvement: We could block MPObjSrc pad from tee-eleement here, when
       
   212 				 * tee-element supports sending stream to one pad when others are blocked */
       
   213 
       
   214 				if(!cameraCtx->recording && !cameraCtx->snapshotting)
       
   215 				{
       
   216 					/* Neither view finder or recorder is running -> pause camera */
       
   217 					if ( GST_STATE( GST_ELEMENT(mCtx->source)) == GST_STATE_PLAYING )
       
   218 					{
       
   219 						GstStateChangeReturn gret;
       
   220 						DEBUG_INFO("Stop camera source");
       
   221 						gret = gst_element_set_state( GST_ELEMENT(mCtx->source), GST_STATE_PAUSED );
       
   222 						if(gret == GST_STATE_CHANGE_SUCCESS)
       
   223 						    gret = gst_element_get_state( GST_ELEMENT(mCtx->source), NULL,NULL, XA_ADAPT_ASYNC_TIMEOUT_SHORT_NSEC );
       
   224 					}
       
   225 				}
       
   226 			}
       
   227 
       
   228 /*            if ( bCtx->pipeSrcThrCtx.state != CPStateNull )
       
   229             {
       
   230                 bCtx->pipeSrcThrCtx.state = CPStatePaused;
       
   231             }*/
       
   232             bCtx->binWantedState = GST_STATE_PAUSED;
       
   233             if(mCtx->runpositiontimer > 0)
       
   234             {
       
   235                 g_source_remove(mCtx->runpositiontimer);
       
   236                 mCtx->runpositiontimer=0;
       
   237             }
       
   238             break;
       
   239         case XA_PLAYSTATE_PLAYING:
       
   240         {
       
   241         	if ( cameraCtx && mCtx->isobjsrc )
       
   242         	{
       
   243         		cameraCtx->playing = XA_BOOLEAN_TRUE;
       
   244         	}
       
   245 
       
   246         	if ( mCtx->videoppBScrbin )
       
   247         	{
       
   248         		gst_element_set_state( GST_ELEMENT(mCtx->videoppBScrbin), GST_STATE_PAUSED);
       
   249         	}
       
   250         	if  (mCtx->isobjsrc && !mCtx->cameraSinkSynced && cameraCtx )
       
   251         	{ /* create videosink now */
       
   252 				mCtx->cameraSinkSynced = XA_BOOLEAN_TRUE;
       
   253 				if ( mCtx->videosink )
       
   254 				{
       
   255 					gst_element_unlink( mCtx->filter,mCtx->videosink );
       
   256 					gst_element_set_state( GST_ELEMENT(mCtx->videosink), GST_STATE_NULL);
       
   257 					gst_bin_remove( GST_BIN(mCtx->baseObj.bin), mCtx->videosink);
       
   258 					mCtx->videosink = XAAdaptationGst_CreateGstSink( mCtx->xaVideoSink, "videosink", &(mCtx->isobjvsink) );
       
   259 					gst_bin_add(GST_BIN(mCtx->baseObj.bin), mCtx->videosink);
       
   260 					if (! gst_element_link(mCtx->filter, mCtx->videosink))
       
   261 			               {
       
   262 			                    DEBUG_ERR("Could not link Filter to videosink!!");
       
   263 			                    return XA_RESULT_INTERNAL_ERROR;
       
   264 			               }
       
   265 				}
       
   266         	}
       
   267 
       
   268 /*            if ( bCtx->pipeSrcThrCtx.state != CPStateNull )
       
   269             {
       
   270                 XAresult retVal = XA_RESULT_SUCCESS;
       
   271 
       
   272                 if ( bCtx->pipeSrcThrCtx.state == CPStateInitialized )
       
   273                 {  Start thread if it's not running 
       
   274                     retVal = XAImpl_StartThread( &(bCtx->pipeSrcThr), NULL, &XAAdaptationGst_ContentPipeScrThrFunc, &(bCtx->pipeSrcThrCtx) );
       
   275                     if ( retVal != XA_RESULT_SUCCESS )
       
   276                     {
       
   277                         DEBUG_ERR("Could not start content pipe thread!");
       
   278                     }
       
   279                 }
       
   280                 if ( bCtx->pipeSrcThrCtx.state == CPStatePaused ||
       
   281                      bCtx->pipeSrcThrCtx.state == CPStateInitialized ||
       
   282                      bCtx->pipeSrcThrCtx.state == CPStateStarted )
       
   283                 retVal = XAImpl_PostSemaphore( bCtx->pipeSrcThrCtx.stateSem );
       
   284                 if ( retVal != XA_RESULT_SUCCESS )
       
   285                 {
       
   286                     DEBUG_ERR("Could not post content pipe semaphore!");
       
   287                 }
       
   288             }*/
       
   289 
       
   290             bCtx->binWantedState = GST_STATE_PLAYING;
       
   291             if(mCtx->playrate!=1 && !mCtx->isobjsrc)
       
   292             { /*set seek element for ff, rew and slow*/
       
   293                 XAAdaptationGst_PrepareAsyncWait(bCtx);
       
   294                 DEBUG_INFO_A1("Apply new playrate %f.", mCtx->playrate);
       
   295                 if(!gst_element_seek( bCtx->bin, mCtx->playrate, GST_FORMAT_TIME,
       
   296                                     (GstSeekFlags)(GST_SEEK_FLAG_FLUSH|GST_SEEK_FLAG_ACCURATE),
       
   297                                     GST_SEEK_TYPE_NONE, 0,
       
   298                                     GST_SEEK_TYPE_NONE, -1))
       
   299                 {
       
   300                     DEBUG_ERR("WARN: gst reports seek not handled");
       
   301                 }
       
   302                 /* flushed seeks always asynchronous */
       
   303                 XAAdaptationGst_StartAsyncWait(bCtx);
       
   304                 DEBUG_INFO("New playrate handled.");
       
   305                 bCtx->waitingasyncop = XA_BOOLEAN_FALSE;
       
   306             }
       
   307 
       
   308             playing = XA_BOOLEAN_TRUE;
       
   309             break;
       
   310         }
       
   311         default:
       
   312             ret = XA_RESULT_PARAMETER_INVALID;
       
   313             break;
       
   314     }
       
   315     /* launch Gstreamer state change only if necessary */
       
   316     if( GST_STATE_TARGET(bCtx->bin) == bCtx->binWantedState )
       
   317     {
       
   318         DEBUG_INFO("Gst already in or transitioning to wanted state");
       
   319         requestStateChange = XA_BOOLEAN_FALSE;
       
   320     }
       
   321     else
       
   322     {
       
   323         if( (GST_STATE(bCtx->bin) == bCtx->binWantedState) &&
       
   324             (GST_STATE_PENDING(bCtx->bin) == GST_STATE_VOID_PENDING) )
       
   325         {
       
   326             DEBUG_ERR_A3("WARNING : gststate %d == wanted %d != gsttarget %d and no statechange pending",
       
   327                           GST_STATE(bCtx->bin), bCtx->binWantedState, GST_STATE_TARGET(bCtx->bin));
       
   328         }
       
   329         requestStateChange = XA_BOOLEAN_TRUE;
       
   330     }
       
   331 
       
   332     if( requestStateChange )
       
   333     {
       
   334         XAAdaptationGst_PrepareAsyncWait(bCtx);
       
   335         DEBUG_INFO_A1("Sending change state request to state %d", bCtx->binWantedState);
       
   336         gstRet = gst_element_set_state( GST_ELEMENT(bCtx->bin), bCtx->binWantedState);
       
   337         switch ( gstRet )
       
   338         {
       
   339             case GST_STATE_CHANGE_FAILURE:
       
   340                 DEBUG_ERR_A1("FAILED to change state (target %s)",
       
   341                               gst_element_state_get_name(bCtx->binWantedState));
       
   342                 bCtx->binWantedState = GST_STATE(bCtx->bin);
       
   343                 ret = XA_RESULT_INTERNAL_ERROR;
       
   344                 break;
       
   345             case GST_STATE_CHANGE_ASYNC:
       
   346                 DEBUG_INFO_A1("Change state will happen asyncronously (target %s)",
       
   347                                gst_element_state_get_name(bCtx->binWantedState));
       
   348                 XAAdaptationGst_StartAsyncWait(bCtx);
       
   349                 ret = XA_RESULT_SUCCESS;
       
   350                 break;
       
   351             case GST_STATE_CHANGE_NO_PREROLL:
       
   352                 DEBUG_INFO("GST_STATE_CHANGE_NO_PREROLL");
       
   353                 /* deliberate fall-through */
       
   354             case GST_STATE_CHANGE_SUCCESS:
       
   355                 DEBUG_INFO_A1("Successfully changed state (target %s)",
       
   356                                gst_element_state_get_name(bCtx->binWantedState));
       
   357                 ret = XA_RESULT_SUCCESS;
       
   358                 break;
       
   359             default:
       
   360                 DEBUG_ERR_A1("Unhandled error (%d)",gstRet);
       
   361                 ret = XA_RESULT_UNKNOWN_ERROR;
       
   362                 break;
       
   363         }
       
   364         bCtx->waitingasyncop = XA_BOOLEAN_FALSE;
       
   365     }
       
   366 
       
   367     if (playing && mCtx->isobjsrc && cameraCtx )
       
   368     {
       
   369     	GstPad* moSrc=NULL ;
       
   370 
       
   371     	playing = XA_BOOLEAN_FALSE;
       
   372     	moSrc = gst_element_get_static_pad( mCtx->source, "MPObjSrc");
       
   373 		if( moSrc && gst_pad_is_linked(moSrc) )
       
   374 		{
       
   375 			DEBUG_INFO_A2("unblock element:%s pad:%s",
       
   376 					gst_element_get_name( mCtx->source),
       
   377 					gst_pad_get_name(moSrc));
       
   378 			gst_pad_set_blocked_async(moSrc, FALSE, XAAdaptationGst_PadBlockCb, NULL);
       
   379 		}
       
   380 
       
   381 		if ( GST_STATE( GST_ELEMENT(mCtx->source)) != GST_STATE_PLAYING )
       
   382 		{
       
   383 			GstStateChangeReturn gret;
       
   384 			DEBUG_INFO("Start camera source");
       
   385 			gret = gst_element_set_state( GST_ELEMENT(mCtx->source), GST_STATE_PLAYING );
       
   386 			if(gret == GST_STATE_CHANGE_SUCCESS)
       
   387 			    gret = gst_element_get_state( GST_ELEMENT(mCtx->source), NULL,NULL, XA_ADAPT_ASYNC_TIMEOUT_SHORT_NSEC );
       
   388 		}
       
   389     }
       
   390     DEBUG_API("<-XAPlayItfAdaptGST_SetPlayState");
       
   391     return ret;
       
   392 }
       
   393 
       
   394 /*
       
   395  * XAresult XAPlayItfAdaptGST_GetDuration(XAAdaptationGstCtx *bCtx, XAmillisecond *pMsec)
       
   396  * @param XAAdaptationGstCtx *bCtx - Adaptation context, this will be casted to correct type regarding to contextID
       
   397  * XAmillisecond *pMsec - Pointer where to store duration of stream.
       
   398  * @return XAresult ret - Success value
       
   399  */
       
   400 XAresult XAPlayItfAdaptGST_GetDuration(XAAdaptationGstCtx *bCtx, XAmillisecond *pMsec)
       
   401 {
       
   402     XAresult ret = XA_RESULT_SUCCESS;
       
   403     GstFormat format = GST_FORMAT_TIME;
       
   404     gint64 duration;
       
   405     DEBUG_API("->XAPlayItfAdaptGST_GetDuration");
       
   406 
       
   407     if(!bCtx || bCtx->baseObj.ctxId != XAMediaPlayerAdaptation || !pMsec)
       
   408     {
       
   409         DEBUG_ERR("XA_RESULT_PARAMETER_INVALID");
       
   410         /* invalid parameter */
       
   411         return XA_RESULT_PARAMETER_INVALID;
       
   412     }
       
   413 
       
   414     if( gst_element_query_duration( GST_ELEMENT(bCtx->bin), &format, &duration ) )
       
   415     {
       
   416         DEBUG_INFO_A1("Duration: %"GST_TIME_FORMAT, GST_TIME_ARGS(duration));
       
   417         ret = XA_RESULT_SUCCESS;
       
   418         *pMsec = GST_TIME_AS_MSECONDS(duration);/*Warning ok due to used API specification*/
       
   419     }
       
   420     else
       
   421     {
       
   422         DEBUG_ERR("WARNING: Gst: could not get duration");
       
   423         *pMsec = XA_TIME_UNKNOWN;
       
   424         ret = XA_RESULT_SUCCESS;
       
   425     }
       
   426 
       
   427     DEBUG_API("<-XAPlayItfAdaptGST_GetDuration");
       
   428     return ret;
       
   429 }
       
   430 
       
   431 /*
       
   432  * XAresult XAPlayItfAdaptGST_GetPosition(XAAdaptationGstCtx *bCtx, XAmillisecond *pMsec)
       
   433  * @param XAAdaptationGstCtx *bCtx - Adaptation context, this will be casted to correct type regarding to contextID value
       
   434  * XAmillisecond *pMsec - Pointer where to store current position in stream.
       
   435  * @return XAresult ret - Success value
       
   436  */
       
   437 XAresult XAPlayItfAdaptGST_GetPosition(XAAdaptationGstCtx *bCtx, XAmillisecond *pMsec)
       
   438 {
       
   439     XAresult ret = XA_RESULT_SUCCESS;
       
   440     gint64 position;
       
   441     GstFormat format = GST_FORMAT_TIME;
       
   442     DEBUG_API("->XAPlayItfAdapGSTt_GetPosition");
       
   443 
       
   444     if(!bCtx || bCtx->baseObj.ctxId != XAMediaPlayerAdaptation)
       
   445     {
       
   446         DEBUG_ERR("XA_RESULT_PARAMETER_INVALID");
       
   447         /* invalid parameter */
       
   448         return XA_RESULT_PARAMETER_INVALID;
       
   449     }
       
   450 
       
   451     if ( gst_element_query_position( GST_ELEMENT(bCtx->bin), &format, &position  ) )
       
   452     {
       
   453         DEBUG_INFO_A1("Current position %"GST_TIME_FORMAT, GST_TIME_ARGS(position));
       
   454         ret = XA_RESULT_SUCCESS;
       
   455         *pMsec = GST_TIME_AS_MSECONDS(position);/*Warning ok due to used API specification*/
       
   456     }
       
   457     else
       
   458     {
       
   459         DEBUG_ERR("WARNING: Gst: could not get position");
       
   460         /* probably not fully prerolled - safe assumption for position = 0 */
       
   461         *pMsec = 0;
       
   462         ret = XA_RESULT_SUCCESS;
       
   463     }
       
   464 
       
   465     DEBUG_API("<-XAPlayItfAdaptGST_GetPosition");
       
   466     return ret;
       
   467 }
       
   468 
       
   469 /*
       
   470  * XAresult XAPlayItfAdapt_EnablePositionTracking
       
   471  * Enable/disable periodic position tracking callbacks
       
   472  */
       
   473 XAresult XAPlayItfAdapt_EnablePositionTracking(XAAdaptationGstCtx *bCtx, XAboolean enable)
       
   474 {
       
   475     XAMediaPlayerAdaptationCtx* mCtx;
       
   476 
       
   477     DEBUG_API_A1("->XAPlayItfAdapt_EnablePositionTracking (enable: %d)", (int)enable);
       
   478     if(!bCtx || bCtx->baseObj.ctxId != XAMediaPlayerAdaptation)
       
   479     {
       
   480         DEBUG_ERR("XA_RESULT_PARAMETER_INVALID");
       
   481         /* invalid parameter */
       
   482         return XA_RESULT_PARAMETER_INVALID;
       
   483     }
       
   484     mCtx = (XAMediaPlayerAdaptationCtx*) bCtx;
       
   485     if(enable && !(mCtx->trackpositionenabled))
       
   486     {
       
   487         mCtx->trackpositionenabled = XA_BOOLEAN_TRUE;
       
   488         XAMediaPlayerAdapt_UpdatePositionCbTimer(mCtx);
       
   489     }
       
   490     else if (!enable && (mCtx->trackpositionenabled))
       
   491     {
       
   492         mCtx->trackpositionenabled = XA_BOOLEAN_FALSE;
       
   493         XAMediaPlayerAdapt_UpdatePositionCbTimer(mCtx);
       
   494     }
       
   495 
       
   496     DEBUG_API("<-XAPlayItfAdapt_EnablePositionTracking");
       
   497     return XA_RESULT_SUCCESS;
       
   498 }
       
   499