src/content/renderer/pepper/ppb_audio_impl.cc

   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
  21 using ppapi::PpapiGlobals;
  22 using ppapi::thunk::EnterResourceNoLock;
  23 using ppapi::thunk::PPB_Audio_API;
  24 using ppapi::thunk::PPB_AudioConfig_API;
  25 using ppapi::TrackedCallback;
  26
  27 namespace content {
  28
  29 // PPB_Audio_Impl --------------------------------------------------------------
  30
  31 PPB_Audio_Impl::PPB_Audio_Impl(PP_Instance instance)
  32     : Resource(ppapi::OBJECT_IS_IMPL, instance),
  33       audio_(NULL) {
  34 }
  35
  36 PPB_Audio_Impl::~PPB_Audio_Impl() {
  37   // Calling ShutDown() makes sure StreamCreated cannot be called anymore and
  38   // releases the audio data associated with the pointer. Note however, that
  39   // until ShutDown returns, StreamCreated may still be called. This will be
  40   // OK since we'll just immediately clean up the data it stored later in this
  41   // destructor.
  42   if (audio_) {
  43     audio_->ShutDown();
  44     audio_ = NULL;
  45   }
  46 }
  47
  48 // static
  49 PP_Resource PPB_Audio_Impl::Create(
  50     PP_Instance instance,
  51     PP_Resource config,
  52     const ppapi::AudioCallbackCombined& 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
  60 PPB_Audio_API* PPB_Audio_Impl::AsPPB_Audio_API() {
  61   return this;
  62 }
  63
  64 bool PPB_Audio_Impl::Init(PP_Resource config,
  65                           const ppapi::AudioCallbackCombined& callback,
  66                           void* user_data) {
  67   // Validate the config and keep a reference to it.
  68   EnterResourceNoLock<PPB_AudioConfig_API> enter(config, true);
  69   if (enter.failed())
  70     return false;
  71   config_ = config;
  72
  73   if (!callback.IsValid())
  74     return false;
  75   SetCallback(callback, user_data);
  76
  77   PepperPluginInstance* instance = PepperPluginInstance::Get(pp_instance());
  78   if (!instance)
  79     return false;
  80
  81   // When the stream is created, we'll get called back on StreamCreated().
  82   CHECK(!audio_);
  83   audio_ = PepperPlatformAudioOutput::Create(
  84       static_cast<int>(enter.object()->GetSampleRate()),
  85       static_cast<int>(enter.object()->GetSampleFrameCount()),
  86       instance->GetRenderView()->GetRoutingID(),
  87       this);
  88   return audio_ != NULL;
  89 }
  90
  91 PP_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
  97 PP_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
 106 PP_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
 117 int32_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
 148 int32_t PPB_Audio_Impl::GetSyncSocket(int* sync_socket) {
 149   return GetSyncSocketImpl(sync_socket);
 150 }
 151
 152 int32_t PPB_Audio_Impl::GetSharedMemory(int* shm_handle,
 153                                         uint32_t* shm_size) {
 154   return GetSharedMemoryImpl(shm_handle, shm_size);
 155 }
 156
 157 void PPB_Audio_Impl::OnSetStreamInfo(
 158     base::SharedMemoryHandle shared_memory_handle,
 159     size_t shared_memory_size,
 160     base::SyncSocket::Handle socket_handle) {
 161   EnterResourceNoLock<PPB_AudioConfig_API> enter(config_, true);
 162   SetStreamInfo(pp_instance(), shared_memory_handle, shared_memory_size,
 163                 socket_handle, enter.object()->GetSampleRate(),
 164                 enter.object()->GetSampleFrameCount());
 165 }
 166
 167 }  // namespace content