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      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
    124