1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
|
// Copyright 2022 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#ifndef THIRD_PARTY_BLINK_RENDERER_MODULES_WEBAUDIO_SCRIPT_PROCESSOR_HANDLER_H_
#define THIRD_PARTY_BLINK_RENDERER_MODULES_WEBAUDIO_SCRIPT_PROCESSOR_HANDLER_H_
#include "base/gtest_prod_util.h"
#include "base/memory/scoped_refptr.h"
#include "base/memory/weak_ptr.h"
#include "base/synchronization/lock.h"
#include "base/synchronization/waitable_event.h"
#include "third_party/blink/renderer/bindings/core/v8/active_script_wrappable.h"
#include "third_party/blink/renderer/modules/webaudio/audio_node.h"
#include "third_party/blink/renderer/platform/audio/audio_bus.h"
#include "third_party/blink/renderer/platform/heap/persistent.h"
#include "third_party/blink/renderer/platform/wtf/forward.h"
#include "third_party/blink/renderer/platform/wtf/vector.h"
namespace base {
class SingleThreadTaskRunner;
class WaitableEvent;
}
namespace blink {
class AudioBuffer;
class BaseAudioContext;
class SharedAudioBuffer;
class ScriptProcessorHandler final : public AudioHandler {
public:
static scoped_refptr<ScriptProcessorHandler> Create(
AudioNode&,
float sample_rate,
uint32_t buffer_size,
uint32_t number_of_input_channels,
uint32_t number_of_output_channels,
const HeapVector<Member<AudioBuffer>>& input_buffers,
const HeapVector<Member<AudioBuffer>>& output_buffers);
~ScriptProcessorHandler() override;
// AudioHandler
void Process(uint32_t frames_to_process) override;
void Initialize() override;
uint32_t BufferSize() const { return buffer_size_; }
void SetChannelCount(uint32_t, ExceptionState&) override;
void SetChannelCountMode(V8ChannelCountMode::Enum, ExceptionState&) override;
uint32_t NumberOfOutputChannels() const override {
return number_of_output_channels_;
}
base::Lock& GetBufferLock() LOCK_RETURNED(buffer_lock_) {
return buffer_lock_;
}
private:
ScriptProcessorHandler(AudioNode&,
float sample_rate,
uint32_t buffer_size,
uint32_t number_of_input_channels,
uint32_t number_of_output_channels,
const HeapVector<Member<AudioBuffer>>& input_buffers,
const HeapVector<Member<AudioBuffer>>& output_buffers);
double TailTime() const override;
double LatencyTime() const override;
bool RequiresTailProcessing() const final;
void FireProcessEvent(uint32_t);
void FireProcessEventForOfflineAudioContext(uint32_t, base::WaitableEvent*);
// Double buffering
uint32_t DoubleBufferIndex() const { return double_buffer_index_; }
void SwapBuffers() { double_buffer_index_ = 1 - double_buffer_index_; }
uint32_t double_buffer_index_ = 0;
mutable base::Lock buffer_lock_;
WTF::Vector<std::unique_ptr<SharedAudioBuffer>> shared_input_buffers_
GUARDED_BY(buffer_lock_);
WTF::Vector<std::unique_ptr<SharedAudioBuffer>> shared_output_buffers_
GUARDED_BY(buffer_lock_);
uint32_t buffer_size_;
uint32_t buffer_read_write_index_ = 0;
uint32_t number_of_input_channels_;
uint32_t number_of_output_channels_;
scoped_refptr<AudioBus> internal_input_bus_;
scoped_refptr<base::SingleThreadTaskRunner> task_runner_;
base::WeakPtrFactory<ScriptProcessorHandler> weak_ptr_factory_{this};
FRIEND_TEST_ALL_PREFIXES(ScriptProcessorNodeTest, BufferLifetime);
};
} // namespace blink
#endif // THIRD_PARTY_BLINK_RENDERER_MODULES_WEBAUDIO_SCRIPT_PROCESSOR_HANDLER_H_
|
