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Issue 8849003: Rename the shared_impl resource files to give them more regular names. (Closed) Base URL: svn://chrome-svn/chrome/trunk/src/
Patch Set: '' Created 9 years ago
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1 // Copyright (c) 2011 The Chromium Authors. All rights reserved.
2 // Use of this source code is governed by a BSD-style license that can be
3 // found in the LICENSE file.
4
5 #include "ppapi/shared_impl/audio_impl.h"
6
7 #include "base/logging.h"
8
9 namespace ppapi {
10
11 AudioImpl::AudioImpl()
12 : playing_(false),
13 shared_memory_size_(0),
14 callback_(NULL),
15 user_data_(NULL) {
16 }
17
18 AudioImpl::~AudioImpl() {
19 // Closing the socket causes the thread to exit - wait for it.
20 if (socket_.get())
21 socket_->Close();
22 if (audio_thread_.get()) {
23 audio_thread_->Join();
24 audio_thread_.reset();
25 }
26 }
27
28 void AudioImpl::SetCallback(PPB_Audio_Callback callback, void* user_data) {
29 callback_ = callback;
30 user_data_ = user_data;
31 }
32
33 void AudioImpl::SetStartPlaybackState() {
34 DCHECK(!playing_);
35 DCHECK(!audio_thread_.get());
36
37 // If the socket doesn't exist, that means that the plugin has started before
38 // the browser has had a chance to create all the shared memory info and
39 // notify us. This is a common case. In this case, we just set the playing_
40 // flag and the playback will automatically start when that data is available
41 // in SetStreamInfo.
42 if (callback_ && socket_.get())
43 StartThread();
44 playing_ = true;
45 }
46
47 void AudioImpl::SetStopPlaybackState() {
48 DCHECK(playing_);
49
50 if (audio_thread_.get()) {
51 audio_thread_->Join();
52 audio_thread_.reset();
53 }
54 playing_ = false;
55 }
56
57 void AudioImpl::SetStreamInfo(base::SharedMemoryHandle shared_memory_handle,
58 size_t shared_memory_size,
59 base::SyncSocket::Handle socket_handle) {
60 socket_.reset(new base::SyncSocket(socket_handle));
61 shared_memory_.reset(new base::SharedMemory(shared_memory_handle, false));
62 shared_memory_size_ = shared_memory_size;
63
64 if (callback_) {
65 shared_memory_->Map(shared_memory_size_);
66
67 // In common case StartPlayback() was called before StreamCreated().
68 if (playing_)
69 StartThread();
70 }
71 }
72
73 void AudioImpl::StartThread() {
74 DCHECK(callback_);
75 DCHECK(!audio_thread_.get());
76 audio_thread_.reset(new base::DelegateSimpleThread(
77 this, "plugin_audio_thread"));
78 audio_thread_->Start();
79 }
80
81 void AudioImpl::Run() {
82 int pending_data;
83 void* buffer = shared_memory_->memory();
84
85 while (sizeof(pending_data) ==
86 socket_->Receive(&pending_data, sizeof(pending_data)) &&
87 pending_data >= 0) {
88 callback_(buffer, shared_memory_size_, user_data_);
89 }
90 }
91
92 } // namespace ppapi
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