Refactor video capture to new design

ppapi/shared_impl/ppb_video_capture_shared.cc

-// Copyright (c) 2012 The Chromium Authors. All rights reserved.
-// Use of this source code is governed by a BSD-style license that can be
-// found in the LICENSE file.
-
-#include "ppapi/shared_impl/ppb_video_capture_shared.h"
-
-#include "base/logging.h"
-#include "ppapi/c/pp_errors.h"
-#include "ppapi/shared_impl/ppb_device_ref_shared.h"
-#include "ppapi/shared_impl/ppb_resource_array_shared.h"
-
-namespace ppapi {
-
-PPB_VideoCapture_Shared::PPB_VideoCapture_Shared(PP_Instance instance)
-    : Resource(OBJECT_IS_IMPL, instance),
-      open_state_(BEFORE_OPEN),
-      status_(PP_VIDEO_CAPTURE_STATUS_STOPPED),
-      devices_(NULL),
-      resource_object_type_(OBJECT_IS_IMPL) {
-}
-
-PPB_VideoCapture_Shared::PPB_VideoCapture_Shared(
-    const HostResource& host_resource)
-    : Resource(OBJECT_IS_PROXY, host_resource),
-      open_state_(BEFORE_OPEN),
-      status_(PP_VIDEO_CAPTURE_STATUS_STOPPED),
-      devices_(NULL),
-      resource_object_type_(OBJECT_IS_PROXY) {
-}
-
-PPB_VideoCapture_Shared::~PPB_VideoCapture_Shared() {
-}
-
-thunk::PPB_VideoCapture_API* PPB_VideoCapture_Shared::AsPPB_VideoCapture_API() {
-  return this;
-}
-
-int32_t PPB_VideoCapture_Shared::EnumerateDevices(
-    PP_Resource* devices,
-    scoped_refptr<TrackedCallback> callback) {
-  if (TrackedCallback::IsPending(enumerate_devices_callback_))
-    return PP_ERROR_INPROGRESS;
-
-  return InternalEnumerateDevices(devices, callback);
-}
-
-int32_t PPB_VideoCapture_Shared::Open(
-    const std::string& device_id,
-    const PP_VideoCaptureDeviceInfo_Dev& requested_info,
-    uint32_t buffer_count,
-    scoped_refptr<TrackedCallback> callback) {
-  if (open_state_ != BEFORE_OPEN)
-    return PP_ERROR_FAILED;
-
-  if (TrackedCallback::IsPending(open_callback_))
-    return PP_ERROR_INPROGRESS;
-
-  return InternalOpen(device_id, requested_info, buffer_count, callback);
-}
-
-int32_t PPB_VideoCapture_Shared::StartCapture() {
-  if (open_state_ != OPENED ||
-      !SetStatus(PP_VIDEO_CAPTURE_STATUS_STARTING, false)) {
-    return PP_ERROR_FAILED;
-  }
-
-  return InternalStartCapture();
-}
-
-int32_t PPB_VideoCapture_Shared::ReuseBuffer(uint32_t buffer) {
-  return InternalReuseBuffer(buffer);
-}
-
-int32_t PPB_VideoCapture_Shared::StopCapture() {
-  if (open_state_ != OPENED ||
-      !SetStatus(PP_VIDEO_CAPTURE_STATUS_STOPPING, false)) {
-    return PP_ERROR_FAILED;
-  }
-
-  return InternalStopCapture();
-}
-
-void PPB_VideoCapture_Shared::Close() {
-  if (open_state_ == CLOSED)
-    return;
-
-  InternalClose();
-  open_state_ = CLOSED;
-
-  if (TrackedCallback::IsPending(open_callback_))
-    open_callback_->PostAbort();
-}
-
-int32_t PPB_VideoCapture_Shared::StartCapture0_1(
-    const PP_VideoCaptureDeviceInfo_Dev& requested_info,
-    uint32_t buffer_count) {
-  if (open_state_ == BEFORE_OPEN) {
-    if (TrackedCallback::IsPending(open_callback_))
-      return PP_ERROR_FAILED;
-    open_state_ = OPENED;
-  } else if (open_state_ == CLOSED) {
-    return PP_ERROR_FAILED;
-  }
-
-  if (!SetStatus(PP_VIDEO_CAPTURE_STATUS_STARTING, false))
-    return PP_ERROR_FAILED;
-
-  return InternalStartCapture0_1(requested_info, buffer_count);
-}
-
-const std::vector<DeviceRefData>& PPB_VideoCapture_Shared::GetDeviceRefData(
-    ) const {
-  return InternalGetDeviceRefData();
-}
-
-void PPB_VideoCapture_Shared::OnEnumerateDevicesComplete(
-    int32_t result,
-    const std::vector<DeviceRefData>& devices) {
-  DCHECK(TrackedCallback::IsPending(enumerate_devices_callback_));
-
-  if (result == PP_OK && devices_) {
-    *devices_ = PPB_DeviceRef_Shared::CreateResourceArray(
-        resource_object_type_, pp_instance(), devices);
-  }
-  devices_ = NULL;
-
-  enumerate_devices_callback_->Run(result);
-}
-
-void PPB_VideoCapture_Shared::OnOpenComplete(int32_t result) {
-  if (open_state_ == BEFORE_OPEN && result == PP_OK)
-    open_state_ = OPENED;
-
-  // The callback may have been aborted by Close(), or the open operation is
-  // completed synchronously.
-  if (TrackedCallback::IsPending(open_callback_))
-    open_callback_->Run(result);
-}
-
-bool PPB_VideoCapture_Shared::SetStatus(PP_VideoCaptureStatus_Dev status,
-                                        bool forced) {
-  if (!forced) {
-    switch (status) {
-      case PP_VIDEO_CAPTURE_STATUS_STOPPED:
-        if (status_ != PP_VIDEO_CAPTURE_STATUS_STOPPING)
-          return false;
-        break;
-      case PP_VIDEO_CAPTURE_STATUS_STARTING:
-        if (status_ != PP_VIDEO_CAPTURE_STATUS_STOPPED)
-          return false;
-        break;
-      case PP_VIDEO_CAPTURE_STATUS_STARTED:
-        switch (status_) {
-          case PP_VIDEO_CAPTURE_STATUS_STARTING:
-          case PP_VIDEO_CAPTURE_STATUS_PAUSED:
-            break;
-          default:
-            return false;
-        }
-        break;
-      case PP_VIDEO_CAPTURE_STATUS_PAUSED:
-        switch (status_) {
-          case PP_VIDEO_CAPTURE_STATUS_STARTING:
-          case PP_VIDEO_CAPTURE_STATUS_STARTED:
-            break;
-          default:
-            return false;
-        }
-        break;
-      case PP_VIDEO_CAPTURE_STATUS_STOPPING:
-        switch (status_) {
-          case PP_VIDEO_CAPTURE_STATUS_STARTING:
-          case PP_VIDEO_CAPTURE_STATUS_STARTED:
-          case PP_VIDEO_CAPTURE_STATUS_PAUSED:
-            break;
-          default:
-            return false;
-        }
-        break;
-    }
-  }
-
-  status_ = status;
-  return true;
-}
-
-}  // namespace ppapi