1 /*
2 * Copyright (C) 2012, Google Inc. All rights reserved.
3 *
4 * Redistribution and use in source and binary forms, with or without
5 * modification, are permitted provided that the following conditions
6 * are met:
7 * 1. Redistributions of source code must retain the above copyright
8 * notice, this list of conditions and the following disclaimer.
9 * 2. Redistributions in binary form must reproduce the above copyright
10 * notice, this list of conditions and the following disclaimer in the
11 * documentation and/or other materials provided with the distribution.
12 *
13 * THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS'' AND ANY
14 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
15 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
16 * DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS BE LIABLE FOR ANY
17 * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
18 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
19 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
20 * ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
21 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
22 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
23 */
24
25 #include "config.h"
26
27 #if ENABLE(WEB_AUDIO)
28
29 #include "modules/webaudio/OfflineAudioContext.h"
30
31 #include "bindings/v8/ExceptionMessages.h"
32 #include "bindings/v8/ExceptionState.h"
33 #include "core/dom/Document.h"
34 #include "core/dom/ExceptionCode.h"
35 #include "core/dom/ExecutionContext.h"
36
37 namespace WebCore {
38
create(ExecutionContext * context,unsigned numberOfChannels,size_t numberOfFrames,float sampleRate,ExceptionState & exceptionState)39 PassRefPtr<OfflineAudioContext> OfflineAudioContext::create(ExecutionContext* context, unsigned numberOfChannels, size_t numberOfFrames, float sampleRate, ExceptionState& exceptionState)
40 {
41 // FIXME: add support for workers.
42 if (!context || !context->isDocument()) {
43 exceptionState.throwDOMException(
44 NotSupportedError,
45 "Workers are not supported.");
46 return 0;
47 }
48
49 Document* document = toDocument(context);
50
51 if (!numberOfFrames) {
52 exceptionState.throwDOMException(SyntaxError, "number of frames cannot be zero.");
53 return 0;
54 }
55
56 if (numberOfChannels > 10) {
57 exceptionState.throwDOMException(SyntaxError, "number of channels (" + String::number(numberOfChannels) + ") exceeds maximum (10).");
58 return 0;
59 }
60
61 if (!isSampleRateRangeGood(sampleRate)) {
62 exceptionState.throwDOMException(SyntaxError, "sample rate (" + String::number(sampleRate) + ") must be in the range 44100-96000 Hz.");
63 return 0;
64 }
65
66 RefPtr<OfflineAudioContext> audioContext(adoptRef(new OfflineAudioContext(document, numberOfChannels, numberOfFrames, sampleRate)));
67 audioContext->suspendIfNeeded();
68 return audioContext.release();
69 }
70
OfflineAudioContext(Document * document,unsigned numberOfChannels,size_t numberOfFrames,float sampleRate)71 OfflineAudioContext::OfflineAudioContext(Document* document, unsigned numberOfChannels, size_t numberOfFrames, float sampleRate)
72 : AudioContext(document, numberOfChannels, numberOfFrames, sampleRate)
73 {
74 ScriptWrappable::init(this);
75 }
76
~OfflineAudioContext()77 OfflineAudioContext::~OfflineAudioContext()
78 {
79 }
80
81 } // namespace WebCore
82
83 #endif // ENABLE(WEB_AUDIO)
84