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/pepper_platform_audio_output.h"
   9 #include "content/renderer/pepper/pepper_plugin_instance_impl.h"
  10 #include "content/renderer/render_frame_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), audio_(NULL) {}
  33
  34 PPB_Audio_Impl::~PPB_Audio_Impl() {
  35   // Calling ShutDown() makes sure StreamCreated cannot be called anymore and
  36   // releases the audio data associated with the pointer. Note however, that
  37   // until ShutDown returns, StreamCreated may still be called. This will be
  38   // OK since we'll just immediately clean up the data it stored later in this
  39   // destructor.
  40   if (audio_) {
  41     audio_->ShutDown();
  42     audio_ = NULL;
  43   }
  44 }
  45
  46 PPB_Audio_API* PPB_Audio_Impl::AsPPB_Audio_API() { return this; }
  47
  48 PP_Resource PPB_Audio_Impl::GetCurrentConfig() {
  49   // AddRef on behalf of caller, while keeping a ref for ourselves.
  50   PpapiGlobals::Get()->GetResourceTracker()->AddRefResource(config_);
  51   return config_;
  52 }
  53
  54 PP_Bool PPB_Audio_Impl::StartPlayback() {
  55   if (!audio_)
  56     return PP_FALSE;
  57   if (playing())
  58     return PP_TRUE;
  59   SetStartPlaybackState();
  60   return PP_FromBool(audio_->StartPlayback());
  61 }
  62
  63 PP_Bool PPB_Audio_Impl::StopPlayback() {
  64   if (!audio_)
  65     return PP_FALSE;
  66   if (!playing())
  67     return PP_TRUE;
  68   if (!audio_->StopPlayback())
  69     return PP_FALSE;
  70   SetStopPlaybackState();
  71   return PP_TRUE;
  72 }
  73
  74 int32_t PPB_Audio_Impl::Open(PP_Resource config,
  75                              scoped_refptr<TrackedCallback> create_callback) {
  76   // Validate the config and keep a reference to it.
  77   EnterResourceNoLock<PPB_AudioConfig_API> enter(config, true);
  78   if (enter.failed())
  79     return PP_ERROR_FAILED;
  80   config_ = config;
  81
  82   PepperPluginInstanceImpl* instance = static_cast<PepperPluginInstanceImpl*>(
  83       PepperPluginInstance::Get(pp_instance()));
  84   if (!instance)
  85     return PP_ERROR_FAILED;
  86
  87   // When the stream is created, we'll get called back on StreamCreated().
  88   DCHECK(!audio_);
  89   audio_ = PepperPlatformAudioOutput::Create(
  90       static_cast<int>(enter.object()->GetSampleRate()),
  91       static_cast<int>(enter.object()->GetSampleFrameCount()),
  92       instance->GetRenderView()->GetRoutingID(),
  93       instance->render_frame()->GetRoutingID(),
  94       this);
  95   if (!audio_)
  96     return PP_ERROR_FAILED;
  97
  98   // At this point, we are guaranteeing ownership of the completion
  99   // callback.  Audio promises to fire the completion callback
 100   // once and only once.
 101   SetCreateCallback(create_callback);
 102
 103   return PP_OK_COMPLETIONPENDING;
 104 }
 105
 106 int32_t PPB_Audio_Impl::GetSyncSocket(int* sync_socket) {
 107   return GetSyncSocketImpl(sync_socket);
 108 }
 109
 110 int32_t PPB_Audio_Impl::GetSharedMemory(int* shm_handle, uint32_t* shm_size) {
 111   return GetSharedMemoryImpl(shm_handle, shm_size);
 112 }
 113
 114 void PPB_Audio_Impl::OnSetStreamInfo(
 115     base::SharedMemoryHandle shared_memory_handle,
 116     size_t shared_memory_size,
 117     base::SyncSocket::Handle socket_handle) {
 118   EnterResourceNoLock<PPB_AudioConfig_API> enter(config_, true);
 119   SetStreamInfo(pp_instance(),
 120                 shared_memory_handle,
 121                 shared_memory_size,
 122                 socket_handle,
 123                 enter.object()->GetSampleRate(),
 124                 enter.object()->GetSampleFrameCount());
 125 }
 126
 127 }  // namespace content