1/*
2 * Copyright (C) 2010, 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 "AudioContext.h"
30
31#include "AudioBuffer.h"
32#include "Document.h"
33#include "JSAudioBuffer.h"
34#include "JSAudioContext.h"
35#include "JSDOMBinding.h"
36#include "JSOfflineAudioContext.h"
37#include "OfflineAudioContext.h"
38#include <runtime/ArrayBuffer.h>
39#include <runtime/Error.h>
40#include <runtime/JSArrayBuffer.h>
41
42using namespace JSC;
43
44namespace WebCore {
45
46EncodedJSValue JSC_HOST_CALL constructJSAudioContext(ExecState* exec)
47{
48    DOMConstructorObject* jsConstructor = jsCast<DOMConstructorObject*>(exec->callee());
49    if (!jsConstructor)
50        return throwVMError(exec, createReferenceError(exec, "AudioContext constructor callee is unavailable"));
51
52    ScriptExecutionContext* scriptExecutionContext = jsConstructor->scriptExecutionContext();
53    if (!scriptExecutionContext)
54        return throwVMError(exec, createReferenceError(exec, "AudioContext constructor script execution context is unavailable"));
55
56    if (!scriptExecutionContext->isDocument())
57        return throwVMError(exec, createReferenceError(exec, "AudioContext constructor called in a script execution context which is not a document"));
58
59    Document& document = toDocument(*scriptExecutionContext);
60
61    RefPtr<AudioContext> audioContext;
62
63    if (!exec->argumentCount()) {
64        // Constructor for default AudioContext which talks to audio hardware.
65        ExceptionCode ec = 0;
66        audioContext = AudioContext::create(document, ec);
67        if (ec) {
68            setDOMException(exec, ec);
69            return JSValue::encode(JSValue());
70        }
71        if (!audioContext.get())
72            return throwVMError(exec, createSyntaxError(exec, "audio resources unavailable for AudioContext construction"));
73    } else {
74#if ENABLE(LEGACY_WEB_AUDIO)
75        // Constructor for offline (render-target) AudioContext which renders into an AudioBuffer.
76        // new AudioContext(in unsigned long numberOfChannels, in unsigned long numberOfFrames, in float sampleRate);
77        document.addConsoleMessage(MessageSource::JS, MessageLevel::Warning, ASCIILiteral("Deprecated AudioContext constructor: use OfflineAudioContext instead"));
78
79        if (exec->argumentCount() < 3)
80            return throwVMError(exec, createNotEnoughArgumentsError(exec));
81
82        int32_t numberOfChannels = exec->argument(0).toInt32(exec);
83        int32_t numberOfFrames = exec->argument(1).toInt32(exec);
84        float sampleRate = exec->argument(2).toFloat(exec);
85
86        if (numberOfChannels <= 0 || numberOfChannels > 10)
87            return throwVMError(exec, createSyntaxError(exec, "Invalid number of channels"));
88
89        if (numberOfFrames <= 0)
90            return throwVMError(exec, createSyntaxError(exec, "Invalid number of frames"));
91
92        if (sampleRate <= 0)
93            return throwVMError(exec, createSyntaxError(exec, "Invalid sample rate"));
94
95
96        ExceptionCode ec = 0;
97        audioContext = OfflineAudioContext::create(document, numberOfChannels, numberOfFrames, sampleRate, ec);
98        if (ec) {
99            setDOMException(exec, ec);
100            return throwVMError(exec, createSyntaxError(exec, "Error creating OfflineAudioContext"));
101        }
102#else
103        return throwVMError(exec, createSyntaxError(exec, "Illegal AudioContext constructor"));
104#endif
105    }
106
107    if (!audioContext.get())
108        return throwVMError(exec, createReferenceError(exec, "Error creating AudioContext"));
109
110    return JSValue::encode(CREATE_DOM_WRAPPER(jsConstructor->globalObject(), AudioContext, audioContext.get()));
111}
112
113} // namespace WebCore
114
115#endif // ENABLE(WEB_AUDIO)
116