content/renderer/pepper/pepper_video_destination_host.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 "content/renderer/pepper/pepper_video_destination_host.h"
   6
   7 #include "base/time/time.h"
   8 #include "content/public/renderer/renderer_ppapi_host.h"
   9 #include "content/renderer/pepper/ppb_image_data_impl.h"
  10 #include "ppapi/c/pp_errors.h"
  11 #include "ppapi/host/dispatch_host_message.h"
  12 #include "ppapi/host/host_message_context.h"
  13 #include "ppapi/host/ppapi_host.h"
  14 #include "ppapi/proxy/ppapi_messages.h"
  15 #include "ppapi/thunk/enter.h"
  16 #include "ppapi/thunk/ppb_image_data_api.h"
  17
  18 using ppapi::host::HostMessageContext;
  19 using ppapi::host::ReplyMessageContext;
  20
  21 namespace content {
  22
  23 PepperVideoDestinationHost::PepperVideoDestinationHost(RendererPpapiHost* host,
  24                                                        PP_Instance instance,
  25                                                        PP_Resource resource)
  26     : ResourceHost(host->GetPpapiHost(), instance, resource),
  27       renderer_ppapi_host_(host),
  28       weak_factory_(this) {}
  29
  30 PepperVideoDestinationHost::~PepperVideoDestinationHost() {}
  31
  32 int32_t PepperVideoDestinationHost::OnResourceMessageReceived(
  33     const IPC::Message& msg,
  34     HostMessageContext* context) {
  35   PPAPI_BEGIN_MESSAGE_MAP(PepperVideoDestinationHost, msg)
  36     PPAPI_DISPATCH_HOST_RESOURCE_CALL(PpapiHostMsg_VideoDestination_Open,
  37                                       OnHostMsgOpen)
  38     PPAPI_DISPATCH_HOST_RESOURCE_CALL(PpapiHostMsg_VideoDestination_PutFrame,
  39                                       OnHostMsgPutFrame)
  40     PPAPI_DISPATCH_HOST_RESOURCE_CALL_0(PpapiHostMsg_VideoDestination_Close,
  41                                         OnHostMsgClose)
  42   PPAPI_END_MESSAGE_MAP()
  43   return PP_ERROR_FAILED;
  44 }
  45
  46 int32_t PepperVideoDestinationHost::OnHostMsgOpen(
  47     HostMessageContext* context,
  48     const std::string& stream_url) {
  49   GURL gurl(stream_url);
  50   if (!gurl.is_valid())
  51     return PP_ERROR_BADARGUMENT;
  52
  53   FrameWriterInterface* frame_writer = NULL;
  54   if (!VideoDestinationHandler::Open(
  55           NULL /* registry */, gurl.spec(), &frame_writer))
  56     return PP_ERROR_FAILED;
  57   frame_writer_.reset(frame_writer);
  58
  59   ReplyMessageContext reply_context = context->MakeReplyMessageContext();
  60   reply_context.params.set_result(PP_OK);
  61   host()->SendReply(reply_context, PpapiPluginMsg_VideoDestination_OpenReply());
  62   return PP_OK_COMPLETIONPENDING;
  63 }
  64
  65 int32_t PepperVideoDestinationHost::OnHostMsgPutFrame(
  66     HostMessageContext* context,
  67     const ppapi::HostResource& image_data_resource,
  68     PP_TimeTicks timestamp) {
  69   ppapi::thunk::EnterResourceNoLock<ppapi::thunk::PPB_ImageData_API> enter(
  70       image_data_resource.host_resource(), true);
  71   if (enter.failed())
  72     return PP_ERROR_BADRESOURCE;
  73   PPB_ImageData_Impl* image_data_impl =
  74       static_cast<PPB_ImageData_Impl*>(enter.object());
  75
  76   if (!PPB_ImageData_Impl::IsImageDataFormatSupported(
  77           image_data_impl->format()))
  78     return PP_ERROR_BADARGUMENT;
  79
  80   if (!frame_writer_.get())
  81     return PP_ERROR_FAILED;
  82
  83   // Convert PP_TimeTicks (a double, in seconds) to a TimeDelta (int64,
  84   // microseconds) and then to a video timestamp (int64, nanoseconds). All times
  85   // are relative to the Unix Epoch so don't subtract it to get a delta.
  86   base::TimeDelta time_delta =
  87       base::Time::FromDoubleT(timestamp) - base::Time();
  88   int64_t timestamp_ns =
  89       time_delta.InMicroseconds() * base::Time::kNanosecondsPerMicrosecond;
  90   frame_writer_->PutFrame(image_data_impl, timestamp_ns);
  91
  92   return PP_OK;
  93 }
  94
  95 int32_t PepperVideoDestinationHost::OnHostMsgClose(
  96     HostMessageContext* context) {
  97   frame_writer_.reset(NULL);
  98   return PP_OK;
  99 }
 100
 101 }  // namespace content