LCOV - app.info - content/events/src/nsDOMNotifyAudioAvailableEvent.cpp

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: | 2012-04-21 | 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            1396 : 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            4188 : }

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