mirror of
https://gitlab.winehq.org/wine/wine-gecko.git
synced 2024-09-13 09:24:08 -07:00
126 lines
3.4 KiB
C++
126 lines
3.4 KiB
C++
/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
|
|
/* vim:set ts=2 sw=2 sts=2 et cindent: */
|
|
/* This Source Code Form is subject to the terms of the Mozilla Public
|
|
* License, v. 2.0. If a copy of the MPL was not distributed with this
|
|
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
|
|
|
|
#ifndef AudioBuffer_h_
|
|
#define AudioBuffer_h_
|
|
|
|
#include "nsWrapperCache.h"
|
|
#include "nsCycleCollectionParticipant.h"
|
|
#include "mozilla/Attributes.h"
|
|
#include "EnableWebAudioCheck.h"
|
|
#include "nsAutoPtr.h"
|
|
#include "nsTArray.h"
|
|
#include "AudioContext.h"
|
|
#include "AudioSegment.h"
|
|
#include "AudioNodeEngine.h"
|
|
|
|
struct JSContext;
|
|
class JSObject;
|
|
|
|
namespace mozilla {
|
|
|
|
class ErrorResult;
|
|
|
|
namespace dom {
|
|
|
|
/**
|
|
* An AudioBuffer keeps its data either in the mJSChannels objects, which
|
|
* are Float32Arrays, or in mSharedChannels if the mJSChannels objects have
|
|
* been neutered.
|
|
*/
|
|
class AudioBuffer MOZ_FINAL : public nsISupports,
|
|
public nsWrapperCache,
|
|
public EnableWebAudioCheck
|
|
{
|
|
public:
|
|
AudioBuffer(AudioContext* aContext, uint32_t aLength,
|
|
float aSampleRate);
|
|
~AudioBuffer();
|
|
|
|
// This function needs to be called in order to allocate
|
|
// all of the channels. It is fallible!
|
|
bool InitializeBuffers(uint32_t aNumberOfChannels,
|
|
JSContext* aJSContext);
|
|
|
|
NS_DECL_CYCLE_COLLECTING_ISUPPORTS
|
|
NS_DECL_CYCLE_COLLECTION_SCRIPT_HOLDER_CLASS(AudioBuffer)
|
|
|
|
AudioContext* GetParentObject() const
|
|
{
|
|
return mContext;
|
|
}
|
|
|
|
virtual JSObject* WrapObject(JSContext* aCx, JSObject* aScope) MOZ_OVERRIDE;
|
|
|
|
float SampleRate() const
|
|
{
|
|
return mSampleRate;
|
|
}
|
|
|
|
int32_t Length() const
|
|
{
|
|
return mLength;
|
|
}
|
|
|
|
double Duration() const
|
|
{
|
|
return mLength / static_cast<double> (mSampleRate);
|
|
}
|
|
|
|
uint32_t NumberOfChannels() const
|
|
{
|
|
return mJSChannels.Length();
|
|
}
|
|
|
|
/**
|
|
* If mSharedChannels is non-null, copies its contents to
|
|
* new Float32Arrays in mJSChannels. Returns a Float32Array.
|
|
*/
|
|
JSObject* GetChannelData(JSContext* aJSContext, uint32_t aChannel,
|
|
ErrorResult& aRv);
|
|
|
|
JSObject* GetChannelData(uint32_t aChannel) const {
|
|
// Doesn't perform bounds checking
|
|
MOZ_ASSERT(aChannel < mJSChannels.Length());
|
|
return mJSChannels[aChannel];
|
|
}
|
|
|
|
/**
|
|
* Returns a ThreadSharedFloatArrayBufferList containing the sample data
|
|
* at aRate. Sets *aLength to the number of samples per channel.
|
|
*/
|
|
ThreadSharedFloatArrayBufferList* GetThreadSharedChannelsForRate(JSContext* aContext,
|
|
uint32_t* aRate,
|
|
uint32_t* aLength);
|
|
|
|
// aContents should either come from JS_AllocateArrayBufferContents or
|
|
// JS_StealArrayBufferContents.
|
|
void SetChannelDataFromArrayBufferContents(JSContext* aJSContext,
|
|
uint32_t aChannel,
|
|
void* aContents);
|
|
|
|
protected:
|
|
void RestoreJSChannelData(JSContext* aJSContext);
|
|
void ClearJSChannels();
|
|
|
|
nsRefPtr<AudioContext> mContext;
|
|
// Float32Arrays
|
|
AutoFallibleTArray<JSObject*,2> mJSChannels;
|
|
|
|
// mSharedChannels aggregates the data from mJSChannels. This is non-null
|
|
// if and only if the mJSChannels are neutered.
|
|
nsRefPtr<ThreadSharedFloatArrayBufferList> mSharedChannels;
|
|
|
|
uint32_t mLength;
|
|
float mSampleRate;
|
|
};
|
|
|
|
}
|
|
}
|
|
|
|
#endif
|
|
|