1// Copyright (c) 2012 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 "content/renderer/pepper/ppb_audio_impl.h"
6
7#include "base/logging.h"
8#include "content/renderer/pepper/common.h"
9#include "content/renderer/pepper/pepper_platform_audio_output.h"
10#include "content/renderer/pepper/pepper_plugin_instance_impl.h"
11#include "content/renderer/render_view_impl.h"
12#include "media/audio/audio_output_controller.h"
13#include "ppapi/c/pp_completion_callback.h"
14#include "ppapi/c/ppb_audio.h"
15#include "ppapi/c/ppb_audio_config.h"
16#include "ppapi/shared_impl/resource_tracker.h"
17#include "ppapi/thunk/enter.h"
18#include "ppapi/thunk/ppb_audio_config_api.h"
19#include "ppapi/thunk/thunk.h"
20
21using ppapi::PpapiGlobals;
22using ppapi::thunk::EnterResourceNoLock;
23using ppapi::thunk::PPB_Audio_API;
24using ppapi::thunk::PPB_AudioConfig_API;
25using ppapi::TrackedCallback;
26
27namespace content {
28
29// PPB_Audio_Impl --------------------------------------------------------------
30
31PPB_Audio_Impl::PPB_Audio_Impl(PP_Instance instance)
32    : Resource(ppapi::OBJECT_IS_IMPL, instance),
33      audio_(NULL),
34      sample_frame_count_(0) {
35}
36
37PPB_Audio_Impl::~PPB_Audio_Impl() {
38  // Calling ShutDown() makes sure StreamCreated cannot be called anymore and
39  // releases the audio data associated with the pointer. Note however, that
40  // until ShutDown returns, StreamCreated may still be called. This will be
41  // OK since we'll just immediately clean up the data it stored later in this
42  // destructor.
43  if (audio_) {
44    audio_->ShutDown();
45    audio_ = NULL;
46  }
47}
48
49// static
50PP_Resource PPB_Audio_Impl::Create(PP_Instance instance,
51                                   PP_Resource config,
52                                   PPB_Audio_Callback audio_callback,
53                                   void* user_data) {
54  scoped_refptr<PPB_Audio_Impl> audio(new PPB_Audio_Impl(instance));
55  if (!audio->Init(config, audio_callback, user_data))
56    return 0;
57  return audio->GetReference();
58}
59
60PPB_Audio_API* PPB_Audio_Impl::AsPPB_Audio_API() {
61  return this;
62}
63
64bool PPB_Audio_Impl::Init(PP_Resource config,
65                          PPB_Audio_Callback callback, void* user_data) {
66  // Validate the config and keep a reference to it.
67  EnterResourceNoLock<PPB_AudioConfig_API> enter(config, true);
68  if (enter.failed())
69    return false;
70  config_ = config;
71
72  if (!callback)
73    return false;
74  SetCallback(callback, user_data);
75
76  PepperPluginInstance* instance = PepperPluginInstance::Get(pp_instance());
77  if (!instance)
78    return false;
79
80  // When the stream is created, we'll get called back on StreamCreated().
81  CHECK(!audio_);
82  audio_ = PepperPlatformAudioOutput::Create(
83      static_cast<int>(enter.object()->GetSampleRate()),
84      static_cast<int>(enter.object()->GetSampleFrameCount()),
85      instance->GetRenderView()->GetRoutingID(),
86      this);
87  sample_frame_count_ = enter.object()->GetSampleFrameCount();
88  return audio_ != NULL;
89}
90
91PP_Resource PPB_Audio_Impl::GetCurrentConfig() {
92  // AddRef on behalf of caller, while keeping a ref for ourselves.
93  PpapiGlobals::Get()->GetResourceTracker()->AddRefResource(config_);
94  return config_;
95}
96
97PP_Bool PPB_Audio_Impl::StartPlayback() {
98  if (!audio_)
99    return PP_FALSE;
100  if (playing())
101    return PP_TRUE;
102  SetStartPlaybackState();
103  return BoolToPPBool(audio_->StartPlayback());
104}
105
106PP_Bool PPB_Audio_Impl::StopPlayback() {
107  if (!audio_)
108    return PP_FALSE;
109  if (!playing())
110    return PP_TRUE;
111  if (!audio_->StopPlayback())
112    return PP_FALSE;
113  SetStopPlaybackState();
114  return PP_TRUE;
115}
116
117int32_t PPB_Audio_Impl::Open(
118    PP_Resource config,
119    scoped_refptr<TrackedCallback> create_callback) {
120  // Validate the config and keep a reference to it.
121  EnterResourceNoLock<PPB_AudioConfig_API> enter(config, true);
122  if (enter.failed())
123    return PP_ERROR_FAILED;
124  config_ = config;
125
126  PepperPluginInstance* instance = PepperPluginInstance::Get(pp_instance());
127  if (!instance)
128    return PP_ERROR_FAILED;
129
130  // When the stream is created, we'll get called back on StreamCreated().
131  DCHECK(!audio_);
132  audio_ = PepperPlatformAudioOutput::Create(
133      static_cast<int>(enter.object()->GetSampleRate()),
134      static_cast<int>(enter.object()->GetSampleFrameCount()),
135      instance->GetRenderView()->GetRoutingID(),
136      this);
137  if (!audio_)
138    return PP_ERROR_FAILED;
139
140  // At this point, we are guaranteeing ownership of the completion
141  // callback.  Audio promises to fire the completion callback
142  // once and only once.
143  SetCreateCallback(create_callback);
144
145  return PP_OK_COMPLETIONPENDING;
146}
147
148int32_t PPB_Audio_Impl::GetSyncSocket(int* sync_socket) {
149  return GetSyncSocketImpl(sync_socket);
150}
151
152int32_t PPB_Audio_Impl::GetSharedMemory(int* shm_handle,
153                                        uint32_t* shm_size) {
154  return GetSharedMemoryImpl(shm_handle, shm_size);
155}
156
157void PPB_Audio_Impl::OnSetStreamInfo(
158    base::SharedMemoryHandle shared_memory_handle,
159    size_t shared_memory_size,
160    base::SyncSocket::Handle socket_handle) {
161  SetStreamInfo(pp_instance(), shared_memory_handle, shared_memory_size,
162                socket_handle, sample_frame_count_);
163}
164
165}  // namespace content
166