LCOV - code coverage report
Current view: directory - content/events/src - nsDOMNotifyAudioAvailableEvent.cpp (source / functions) Found Hit Coverage
Test: app.info Lines: 62 2 3.2 %
Date: 2012-06-02 Functions: 16 2 12.5 %

       1                 : /* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
       2                 : /* vim:set ts=2 sw=2 sts=2 et cindent: */
       3                 : /* ***** BEGIN LICENSE BLOCK *****
       4                 :  * Version: MPL 1.1/GPL 2.0/LGPL 2.1
       5                 :  *
       6                 :  * The contents of this file are subject to the Mozilla Public License Version
       7                 :  * 1.1 (the "License"); you may not use this file except in compliance with
       8                 :  * the License. You may obtain a copy of the License at
       9                 :  * http://www.mozilla.org/MPL/
      10                 :  *
      11                 :  * Software distributed under the License is distributed on an "AS IS" basis,
      12                 :  * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
      13                 :  * for the specific language governing rights and limitations under the
      14                 :  * License.
      15                 :  *
      16                 :  * The Original Code is Mozilla code.
      17                 :  *
      18                 :  * The Initial Developer of the Original Code is the Mozilla Foundation.
      19                 :  * Portions created by the Initial Developer are Copyright (C) 2010
      20                 :  * the Initial Developer. All Rights Reserved.
      21                 :  *
      22                 :  * Contributor(s):
      23                 :  *  David Humphrey <david.humphrey@senecac.on.ca>
      24                 :  *  Yury Delendik
      25                 :  *
      26                 :  * Alternatively, the contents of this file may be used under the terms of
      27                 :  * either the GNU General Public License Version 2 or later (the "GPL"), or
      28                 :  * the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
      29                 :  * in which case the provisions of the GPL or the LGPL are applicable instead
      30                 :  * of those above. If you wish to allow use of your version of this file only
      31                 :  * under the terms of either the GPL or the LGPL, and not to allow others to
      32                 :  * use your version of this file under the terms of the MPL, indicate your
      33                 :  * decision by deleting the provisions above and replace them with the notice
      34                 :  * and other provisions required by the GPL or the LGPL. If you do not delete
      35                 :  * the provisions above, a recipient may use your version of this file under
      36                 :  * the terms of any one of the MPL, the GPL or the LGPL.
      37                 :  *
      38                 :  * ***** END LICENSE BLOCK ***** */
      39                 : 
      40                 : #include "nsDOMNotifyAudioAvailableEvent.h"
      41                 : #include "nsDOMClassInfoID.h" // DOMCI_DATA, NS_DOM_INTERFACE_MAP_ENTRY_CLASSINFO
      42                 : #include "nsContentUtils.h" // NS_DROP_JS_OBJECTS
      43                 : #include "jstypedarray.h"
      44                 : 
      45               0 : nsDOMNotifyAudioAvailableEvent::nsDOMNotifyAudioAvailableEvent(nsPresContext* aPresContext,
      46                 :                                                                nsEvent* aEvent,
      47                 :                                                                PRUint32 aEventType,
      48                 :                                                                float* aFrameBuffer,
      49                 :                                                                PRUint32 aFrameBufferLength,
      50                 :                                                                float aTime)
      51                 :   : nsDOMEvent(aPresContext, aEvent),
      52                 :     mFrameBuffer(aFrameBuffer),
      53                 :     mFrameBufferLength(aFrameBufferLength),
      54                 :     mTime(aTime),
      55                 :     mCachedArray(nsnull),
      56               0 :     mAllowAudioData(false)
      57                 : {
      58               0 :   MOZ_COUNT_CTOR(nsDOMNotifyAudioAvailableEvent);
      59               0 :   if (mEvent) {
      60               0 :     mEvent->message = aEventType;
      61                 :   }
      62               0 : }
      63                 : 
      64                 : DOMCI_DATA(NotifyAudioAvailableEvent, nsDOMNotifyAudioAvailableEvent)
      65                 : 
      66            1464 : NS_IMPL_CYCLE_COLLECTION_CLASS(nsDOMNotifyAudioAvailableEvent)
      67                 : 
      68               0 : NS_IMPL_ADDREF_INHERITED(nsDOMNotifyAudioAvailableEvent, nsDOMEvent)
      69               0 : NS_IMPL_RELEASE_INHERITED(nsDOMNotifyAudioAvailableEvent, nsDOMEvent)
      70                 : 
      71               0 : NS_IMPL_CYCLE_COLLECTION_UNLINK_BEGIN_INHERITED(nsDOMNotifyAudioAvailableEvent, nsDOMEvent)
      72               0 :   if (tmp->mCachedArray) {
      73               0 :     NS_DROP_JS_OBJECTS(tmp, nsDOMNotifyAudioAvailableEvent);
      74               0 :     tmp->mCachedArray = nsnull;
      75                 :   }
      76               0 : NS_IMPL_CYCLE_COLLECTION_UNLINK_END
      77                 : 
      78               0 : NS_IMPL_CYCLE_COLLECTION_TRAVERSE_BEGIN_INHERITED(nsDOMNotifyAudioAvailableEvent, nsDOMEvent)
      79               0 :   NS_IMPL_CYCLE_COLLECTION_TRAVERSE_SCRIPT_OBJECTS
      80               0 : NS_IMPL_CYCLE_COLLECTION_TRAVERSE_END
      81                 : 
      82               0 : NS_IMPL_CYCLE_COLLECTION_TRACE_BEGIN(nsDOMNotifyAudioAvailableEvent)
      83               0 :   NS_IMPL_CYCLE_COLLECTION_TRACE_JS_MEMBER_CALLBACK(mCachedArray)
      84               0 : NS_IMPL_CYCLE_COLLECTION_TRACE_END
      85                 : 
      86               0 : NS_INTERFACE_MAP_BEGIN_CYCLE_COLLECTION_INHERITED(nsDOMNotifyAudioAvailableEvent)
      87               0 :   NS_INTERFACE_MAP_ENTRY(nsIDOMNotifyAudioAvailableEvent)
      88               0 :   NS_DOM_INTERFACE_MAP_ENTRY_CLASSINFO(NotifyAudioAvailableEvent)
      89               0 : NS_INTERFACE_MAP_END_INHERITING(nsDOMEvent)
      90                 : 
      91               0 : nsDOMNotifyAudioAvailableEvent::~nsDOMNotifyAudioAvailableEvent()
      92                 : {
      93               0 :   MOZ_COUNT_DTOR(nsDOMNotifyAudioAvailableEvent);
      94               0 :   if (mCachedArray) {
      95               0 :     NS_DROP_JS_OBJECTS(this, nsDOMNotifyAudioAvailableEvent);
      96               0 :     mCachedArray = nsnull;
      97                 :   }
      98               0 : }
      99                 : 
     100                 : NS_IMETHODIMP
     101               0 : nsDOMNotifyAudioAvailableEvent::GetFrameBuffer(JSContext* aCx, jsval* aResult)
     102                 : {
     103               0 :   if (!mAllowAudioData) {
     104                 :     // Media is not same-origin, don't allow the data out.
     105               0 :     return NS_ERROR_DOM_SECURITY_ERR;
     106                 :   }
     107                 : 
     108               0 :   if (mCachedArray) {
     109               0 :     *aResult = OBJECT_TO_JSVAL(mCachedArray);
     110               0 :     return NS_OK;
     111                 :   }
     112                 : 
     113                 :   // Cache this array so we don't recreate on next call.
     114               0 :   NS_HOLD_JS_OBJECTS(this, nsDOMNotifyAudioAvailableEvent);
     115                 : 
     116               0 :   mCachedArray = js_CreateTypedArray(aCx, js::TypedArray::TYPE_FLOAT32, mFrameBufferLength);
     117               0 :   if (!mCachedArray) {
     118               0 :     NS_DROP_JS_OBJECTS(this, nsDOMNotifyAudioAvailableEvent);
     119               0 :     NS_ERROR("Failed to get audio signal!");
     120               0 :     return NS_ERROR_FAILURE;
     121                 :   }
     122                 : 
     123               0 :   JSObject *tdest = js::TypedArray::getTypedArray(mCachedArray);
     124               0 :   memcpy(JS_GetTypedArrayData(tdest), mFrameBuffer.get(), mFrameBufferLength * sizeof(float));
     125                 : 
     126               0 :   *aResult = OBJECT_TO_JSVAL(mCachedArray);
     127               0 :   return NS_OK;
     128                 : }
     129                 : 
     130                 : NS_IMETHODIMP
     131               0 : nsDOMNotifyAudioAvailableEvent::GetTime(float *aRetVal)
     132                 : {
     133               0 :   *aRetVal = mTime;
     134               0 :   return NS_OK;
     135                 : }
     136                 : 
     137                 : NS_IMETHODIMP
     138               0 : nsDOMNotifyAudioAvailableEvent::InitAudioAvailableEvent(const nsAString& aType,
     139                 :                                                         bool aCanBubble,
     140                 :                                                         bool aCancelable,
     141                 :                                                         float* aFrameBuffer,
     142                 :                                                         PRUint32 aFrameBufferLength,
     143                 :                                                         float aTime,
     144                 :                                                         bool aAllowAudioData)
     145                 : {
     146                 :   // Auto manage the memory which stores the frame buffer. This ensures
     147                 :   // that if we exit due to some error, the memory will be freed. Otherwise,
     148                 :   // the framebuffer's memory will be freed when this event is destroyed.
     149               0 :   nsAutoArrayPtr<float> frameBuffer(aFrameBuffer);
     150               0 :   nsresult rv = nsDOMEvent::InitEvent(aType, aCanBubble, aCancelable);
     151               0 :   NS_ENSURE_SUCCESS(rv, rv);
     152                 : 
     153               0 :   mFrameBuffer = frameBuffer.forget();
     154               0 :   mFrameBufferLength = aFrameBufferLength;
     155               0 :   mTime = aTime;
     156               0 :   mAllowAudioData = aAllowAudioData;
     157               0 :   return NS_OK;
     158                 : }
     159                 : 
     160               0 : nsresult NS_NewDOMAudioAvailableEvent(nsIDOMEvent** aInstancePtrResult,
     161                 :                                       nsPresContext* aPresContext,
     162                 :                                       nsEvent *aEvent,
     163                 :                                       PRUint32 aEventType,
     164                 :                                       float* aFrameBuffer,
     165                 :                                       PRUint32 aFrameBufferLength,
     166                 :                                       float aTime)
     167                 : {
     168                 :   nsDOMNotifyAudioAvailableEvent* it =
     169                 :     new nsDOMNotifyAudioAvailableEvent(aPresContext, aEvent, aEventType,
     170               0 :                                        aFrameBuffer, aFrameBufferLength, aTime);
     171               0 :   return CallQueryInterface(it, aInstancePtrResult);
     172            4392 : }

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