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      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
    102