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/*
* Copyright (C) 2010 Google Inc. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. Neither the name of Apple Computer, Inc. ("Apple") nor the names of
* its contributors may be used to endorse or promote products derived
* from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY APPLE AND ITS CONTRIBUTORS "AS IS" AND ANY
* EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
* DISCLAIMED. IN NO EVENT SHALL APPLE OR ITS CONTRIBUTORS BE LIABLE FOR ANY
* DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
* ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#ifndef THIRD_PARTY_BLINK_RENDERER_MODULES_WEBAUDIO_AUDIO_BUFFER_H_
#define THIRD_PARTY_BLINK_RENDERER_MODULES_WEBAUDIO_AUDIO_BUFFER_H_
#include "base/memory/scoped_refptr.h"
#include "third_party/blink/renderer/core/typed_arrays/array_buffer_view_helpers.h"
#include "third_party/blink/renderer/core/typed_arrays/dom_typed_array.h"
#include "third_party/blink/renderer/modules/modules_export.h"
#include "third_party/blink/renderer/platform/bindings/script_wrappable.h"
#include "third_party/blink/renderer/platform/heap/collection_support/heap_vector.h"
#include "third_party/blink/renderer/platform/wtf/allocator/allocator.h"
#include "third_party/blink/renderer/platform/wtf/vector.h"
namespace blink {
class AudioBus;
class AudioBufferOptions;
class ExceptionState;
class SharedAudioBuffer;
class MODULES_EXPORT AudioBuffer final : public ScriptWrappable {
DEFINE_WRAPPERTYPEINFO();
public:
static AudioBuffer* Create(unsigned number_of_channels,
uint32_t number_of_frames,
float sample_rate);
static AudioBuffer* Create(unsigned number_of_channels,
uint32_t number_of_frames,
float sample_rate,
ExceptionState&);
static AudioBuffer* Create(const AudioBufferOptions*, ExceptionState&);
// Creates an AudioBuffer with uninitialized contents. This should
// only be used where we are guaranteed to initialize the contents
// with valid data and where JS cannot access until initializations
// is done. `OfflineAudioContext::StartRendering()` is one such
// place.
static AudioBuffer* CreateUninitialized(unsigned number_of_channels,
uint32_t number_of_frames,
float sample_rate);
static AudioBuffer* CreateFromAudioBus(AudioBus*);
explicit AudioBuffer(AudioBus*);
// How to initialize the contents of an AudioBuffer. Default is to
// zero-initialize (`kZeroInitialize`). Otherwise, leave the array
// uninitialized (`kDontInitialize`).
enum class InitializationPolicy { kZeroInitialize, kDontInitialize };
AudioBuffer(unsigned number_of_channels,
uint32_t number_of_frames,
float sample_rate,
InitializationPolicy allocation_policy =
InitializationPolicy::kZeroInitialize);
// Format
uint32_t length() const { return length_; }
double duration() const {
return length() / static_cast<double>(sampleRate());
}
float sampleRate() const { return sample_rate_; }
// Channel data access
unsigned numberOfChannels() const { return channels_.size(); }
NotShared<DOMFloat32Array> getChannelData(unsigned channel_index,
ExceptionState&);
NotShared<DOMFloat32Array> getChannelData(unsigned channel_index);
void copyFromChannel(NotShared<DOMFloat32Array>,
int32_t channel_number,
ExceptionState&);
void copyFromChannel(NotShared<DOMFloat32Array>,
int32_t channel_number,
size_t buffer_offset,
ExceptionState&);
void copyToChannel(NotShared<DOMFloat32Array>,
int32_t channel_number,
ExceptionState&);
void copyToChannel(NotShared<DOMFloat32Array>,
int32_t channel_number,
size_t buffer_offset,
ExceptionState&);
void Zero();
void Trace(Visitor* visitor) const override {
visitor->Trace(channels_);
ScriptWrappable::Trace(visitor);
}
std::unique_ptr<SharedAudioBuffer> CreateSharedAudioBuffer();
private:
static DOMFloat32Array* CreateFloat32ArrayOrNull(
uint32_t length,
InitializationPolicy allocation_policy =
InitializationPolicy::kZeroInitialize);
bool CreatedSuccessfully(unsigned desired_number_of_channels) const;
float sample_rate_;
uint32_t length_;
HeapVector<Member<DOMFloat32Array>> channels_;
};
// Shared data that audio threads can hold onto.
class SharedAudioBuffer final {
USING_FAST_MALLOC(SharedAudioBuffer);
public:
explicit SharedAudioBuffer(AudioBuffer*);
unsigned numberOfChannels() const { return channels_.size(); }
uint32_t length() const { return length_; }
double duration() const {
return length() / static_cast<double>(sampleRate());
}
float sampleRate() const { return sample_rate_; }
const Vector<ArrayBufferContents>& channels() { return channels_; }
void Zero();
private:
float sample_rate_;
uint32_t length_;
Vector<ArrayBufferContents> channels_;
};
} // namespace blink
#endif // THIRD_PARTY_BLINK_RENDERER_MODULES_WEBAUDIO_AUDIO_BUFFER_H_
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