ppapi/thunk/ppb_video_capture_thunk.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 "ppapi/c/pp_errors.h"
   6 #include "ppapi/shared_impl/ppb_device_ref_shared.h"
   7 #include "ppapi/shared_impl/tracked_callback.h"
   8 #include "ppapi/thunk/enter.h"
   9 #include "ppapi/thunk/ppb_device_ref_api.h"
  10 #include "ppapi/thunk/ppb_video_capture_api.h"
  11 #include "ppapi/thunk/resource_creation_api.h"
  12 #include "ppapi/thunk/thunk.h"
  13
  14 namespace ppapi {
  15 namespace thunk {
  16
  17 namespace {
  18
  19 typedef EnterResource<PPB_VideoCapture_API> EnterVideoCapture;
  20
  21 PP_Resource Create(PP_Instance instance) {
  22   EnterResourceCreation enter(instance);
  23   if (enter.failed())
  24     return 0;
  25   return enter.functions()->CreateVideoCapture(instance);
  26 }
  27
  28 PP_Bool IsVideoCapture(PP_Resource resource) {
  29   EnterVideoCapture enter(resource, false);
  30   return PP_FromBool(enter.succeeded());
  31 }
  32
  33 int32_t EnumerateDevices(PP_Resource video_capture,
  34                          PP_ArrayOutput output,
  35                          PP_CompletionCallback callback) {
  36   EnterVideoCapture enter(video_capture, callback, true);
  37   if (enter.failed())
  38     return enter.retval();
  39
  40   return enter.SetResult(enter.object()->EnumerateDevices(output,
  41                                                           enter.callback()));
  42 }
  43
  44 int32_t MonitorDeviceChange(PP_Resource video_capture,
  45                             PP_MonitorDeviceChangeCallback callback,
  46                             void* user_data) {
  47   EnterVideoCapture enter(video_capture, true);
  48   if (enter.failed())
  49     return enter.retval();
  50   return enter.object()->MonitorDeviceChange(callback, user_data);
  51 }
  52
  53 int32_t Open(PP_Resource video_capture,
  54              PP_Resource device_ref,
  55              const PP_VideoCaptureDeviceInfo_Dev* requested_info,
  56              uint32_t buffer_count,
  57              PP_CompletionCallback callback) {
  58   EnterVideoCapture enter(video_capture, callback, true);
  59   if (enter.failed())
  60     return enter.retval();
  61
  62   std::string device_id;
  63   // |device_id| remains empty if |device_ref| is 0, which means the default
  64   // device.
  65   if (device_ref != 0) {
  66     EnterResourceNoLock<PPB_DeviceRef_API> enter_device_ref(device_ref, true);
  67     if (enter_device_ref.failed())
  68       return enter.SetResult(PP_ERROR_BADRESOURCE);
  69     device_id = enter_device_ref.object()->GetDeviceRefData().id;
  70   }
  71
  72   return enter.SetResult(enter.object()->Open(
  73       device_id, *requested_info, buffer_count, enter.callback()));
  74 }
  75
  76 int32_t StartCapture(PP_Resource video_capture) {
  77   EnterVideoCapture enter(video_capture, true);
  78   if (enter.failed())
  79     return enter.retval();
  80   return enter.object()->StartCapture();
  81 }
  82
  83 int32_t ReuseBuffer(PP_Resource video_capture,
  84                     uint32_t buffer) {
  85   EnterVideoCapture enter(video_capture, true);
  86   if (enter.failed())
  87     return enter.retval();
  88   return enter.object()->ReuseBuffer(buffer);
  89 }
  90
  91 int32_t StopCapture(PP_Resource video_capture) {
  92   EnterVideoCapture enter(video_capture, true);
  93   if (enter.failed())
  94     return enter.retval();
  95   return enter.object()->StopCapture();
  96 }
  97
  98 void Close(PP_Resource video_capture) {
  99   EnterVideoCapture enter(video_capture, true);
 100   if (enter.succeeded())
 101     enter.object()->Close();
 102 }
 103
 104 const PPB_VideoCapture_Dev_0_3 g_ppb_video_capture_0_3_thunk = {
 105   &Create,
 106   &IsVideoCapture,
 107   &EnumerateDevices,
 108   &MonitorDeviceChange,
 109   &Open,
 110   &StartCapture,
 111   &ReuseBuffer,
 112   &StopCapture,
 113   &Close
 114 };
 115
 116 }  // namespace
 117
 118 const PPB_VideoCapture_Dev_0_3* GetPPB_VideoCapture_Dev_0_3_Thunk() {
 119   return &g_ppb_video_capture_0_3_thunk;
 120 }
 121
 122 }  // namespace thunk
 123 }  // namespace ppapi