ppapi/proxy/video_source_resource.cc

   1 // Copyright (c) 2013 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/proxy/video_source_resource.h"
   6
   7 #include "base/bind.h"
   8 #include "ipc/ipc_message.h"
   9 #include "ppapi/c/pp_errors.h"
  10 #include "ppapi/c/private/pp_video_frame_private.h"
  11 #include "ppapi/proxy/ppapi_messages.h"
  12 #include "ppapi/proxy/ppb_image_data_proxy.h"
  13 #include "ppapi/shared_impl/ppapi_globals.h"
  14 #include "ppapi/shared_impl/resource_tracker.h"
  15 #include "ppapi/shared_impl/var.h"
  16 #include "ppapi/thunk/enter.h"
  17
  18 using ppapi::thunk::EnterResourceNoLock;
  19 using ppapi::thunk::PPB_VideoSource_Private_API;
  20
  21 namespace ppapi {
  22 namespace proxy {
  23
  24 VideoSourceResource::VideoSourceResource(
  25     Connection connection,
  26     PP_Instance instance)
  27     : PluginResource(connection, instance),
  28       is_open_(false) {
  29   SendCreate(RENDERER, PpapiHostMsg_VideoSource_Create());
  30 }
  31
  32 VideoSourceResource::~VideoSourceResource() {
  33 }
  34
  35 PPB_VideoSource_Private_API*
  36     VideoSourceResource::AsPPB_VideoSource_Private_API() {
  37   return this;
  38 }
  39
  40 int32_t VideoSourceResource::Open(
  41     const PP_Var& stream_url,
  42     scoped_refptr<TrackedCallback> callback) {
  43   if (TrackedCallback::IsPending(open_callback_))
  44     return PP_ERROR_INPROGRESS;
  45
  46   open_callback_ = callback;
  47
  48   scoped_refptr<StringVar> stream_url_var = StringVar::FromPPVar(stream_url);
  49   const uint32_t kMaxStreamIdSizeInBytes = 16384;
  50   if (!stream_url_var.get() ||
  51       stream_url_var->value().size() > kMaxStreamIdSizeInBytes)
  52     return PP_ERROR_BADARGUMENT;
  53   Call<PpapiPluginMsg_VideoSource_OpenReply>(RENDERER,
  54       PpapiHostMsg_VideoSource_Open(stream_url_var->value()),
  55       base::Bind(&VideoSourceResource::OnPluginMsgOpenComplete, this));
  56   return PP_OK_COMPLETIONPENDING;
  57 }
  58
  59 int32_t VideoSourceResource::GetFrame(
  60     PP_VideoFrame_Private* frame,
  61     scoped_refptr<TrackedCallback> callback) {
  62   if (!is_open_)
  63     return PP_ERROR_FAILED;
  64
  65   if (TrackedCallback::IsPending(get_frame_callback_))
  66     return PP_ERROR_INPROGRESS;
  67
  68   get_frame_callback_ = callback;
  69   Call<PpapiPluginMsg_VideoSource_GetFrameReply>(RENDERER,
  70       PpapiHostMsg_VideoSource_GetFrame(),
  71       base::Bind(&VideoSourceResource::OnPluginMsgGetFrameComplete, this,
  72                  frame));
  73   return PP_OK_COMPLETIONPENDING;
  74 }
  75
  76 void VideoSourceResource::Close() {
  77   Post(RENDERER, PpapiHostMsg_VideoSource_Close());
  78
  79   if (TrackedCallback::IsPending(open_callback_))
  80     open_callback_->PostAbort();
  81   if (TrackedCallback::IsPending(get_frame_callback_))
  82     get_frame_callback_->PostAbort();
  83 }
  84
  85 void VideoSourceResource::OnPluginMsgOpenComplete(
  86     const ResourceMessageReplyParams& reply_params) {
  87   if (TrackedCallback::IsPending(open_callback_)) {
  88     int32_t result = reply_params.result();
  89     if (result == PP_OK)
  90       is_open_ = true;
  91     open_callback_->Run(result);
  92   }
  93 }
  94
  95 void VideoSourceResource::OnPluginMsgGetFrameComplete(
  96     PP_VideoFrame_Private* frame,
  97     const ResourceMessageReplyParams& reply_params,
  98     const HostResource& image_data,
  99     const PP_ImageDataDesc& image_desc,
 100     PP_TimeTicks timestamp) {
 101   // The callback may have been aborted by Close().
 102   if (TrackedCallback::IsPending(get_frame_callback_)) {
 103     int32_t result = reply_params.result();
 104     if (result == PP_OK &&
 105         PPB_ImageData_Shared::IsImageDataDescValid(image_desc)) {
 106       frame->timestamp = timestamp;
 107
 108       base::SharedMemoryHandle handle;
 109       if (!reply_params.TakeSharedMemoryHandleAtIndex(0, &handle))
 110         frame->image_data = 0;
 111       frame->image_data =
 112           (new SimpleImageData(
 113               image_data, image_desc, handle))->GetReference();
 114     }
 115     get_frame_callback_->Run(result);
 116   }
 117 }
 118
 119 }  // namespace proxy
 120 }  // namespace ppapi