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// 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/cpp/dev/video_capture_dev.h"
#include "ppapi/c/dev/ppb_video_capture_dev.h"
#include "ppapi/c/pp_errors.h"
#include "ppapi/cpp/completion_callback.h"
#include "ppapi/cpp/dev/device_ref_dev.h"
#include "ppapi/cpp/dev/resource_array_dev.h"
#include "ppapi/cpp/instance.h"
#include "ppapi/cpp/module.h"
#include "ppapi/cpp/module_impl.h"
namespace pp {
namespace {
template <> const char* interface_name<PPB_VideoCapture_Dev>() {
return PPB_VIDEOCAPTURE_DEV_INTERFACE;
}
} // namespace
struct VideoCapture_Dev::EnumerateDevicesState {
EnumerateDevicesState(std::vector<DeviceRef_Dev>* in_devices,
const CompletionCallback& in_callback,
VideoCapture_Dev* in_video_capture)
: devices_resource(0),
devices(in_devices),
callback(in_callback),
video_capture(in_video_capture) {
}
PP_Resource devices_resource;
std::vector<DeviceRef_Dev>* devices;
CompletionCallback callback;
VideoCapture_Dev* video_capture;
};
VideoCapture_Dev::VideoCapture_Dev(const Instance& instance)
: enum_state_(NULL) {
if (!has_interface<PPB_VideoCapture_Dev>())
return;
PassRefFromConstructor(get_interface<PPB_VideoCapture_Dev>()->Create(
instance.pp_instance()));
}
VideoCapture_Dev::VideoCapture_Dev(PP_Resource resource)
: Resource(resource),
enum_state_(NULL) {
}
VideoCapture_Dev::VideoCapture_Dev(const VideoCapture_Dev& other)
: Resource(other),
enum_state_(NULL) {
}
VideoCapture_Dev::~VideoCapture_Dev() {
AbortEnumerateDevices();
}
VideoCapture_Dev& VideoCapture_Dev::operator=(
const VideoCapture_Dev& other) {
AbortEnumerateDevices();
Resource::operator=(other);
return *this;
}
// static
bool VideoCapture_Dev::IsAvailable() {
return has_interface<PPB_VideoCapture_Dev>();
}
int32_t VideoCapture_Dev::EnumerateDevices(std::vector<DeviceRef_Dev>* devices,
const CompletionCallback& callback) {
if (!has_interface<PPB_VideoCapture_Dev>())
return callback.MayForce(PP_ERROR_NOINTERFACE);
if (!devices)
return callback.MayForce(PP_ERROR_BADARGUMENT);
if (!callback.pp_completion_callback().func)
return callback.MayForce(PP_ERROR_BLOCKS_MAIN_THREAD);
if (enum_state_)
return callback.MayForce(PP_ERROR_INPROGRESS);
// It will be deleted in OnEnumerateDevicesComplete().
enum_state_ = new EnumerateDevicesState(devices, callback, this);
return get_interface<PPB_VideoCapture_Dev>()->EnumerateDevices(
pp_resource(), &enum_state_->devices_resource,
PP_MakeCompletionCallback(&VideoCapture_Dev::OnEnumerateDevicesComplete,
enum_state_));
}
int32_t VideoCapture_Dev::Open(
const DeviceRef_Dev& device_ref,
const PP_VideoCaptureDeviceInfo_Dev& requested_info,
uint32_t buffer_count,
const CompletionCallback& callback) {
if (!has_interface<PPB_VideoCapture_Dev>())
return callback.MayForce(PP_ERROR_NOINTERFACE);
return get_interface<PPB_VideoCapture_Dev>()->Open(
pp_resource(), device_ref.pp_resource(), &requested_info, buffer_count,
callback.pp_completion_callback());
}
int32_t VideoCapture_Dev::StartCapture() {
if (!has_interface<PPB_VideoCapture_Dev>())
return PP_ERROR_NOINTERFACE;
return get_interface<PPB_VideoCapture_Dev>()->StartCapture(pp_resource());
}
int32_t VideoCapture_Dev::ReuseBuffer(uint32_t buffer) {
if (!has_interface<PPB_VideoCapture_Dev>())
return PP_ERROR_NOINTERFACE;
return get_interface<PPB_VideoCapture_Dev>()->ReuseBuffer(
pp_resource(), buffer);
}
int32_t VideoCapture_Dev::StopCapture() {
if (!has_interface<PPB_VideoCapture_Dev>())
return PP_ERROR_NOINTERFACE;
return get_interface<PPB_VideoCapture_Dev>()->StopCapture(pp_resource());
}
void VideoCapture_Dev::Close() {
if (has_interface<PPB_VideoCapture_Dev>())
get_interface<PPB_VideoCapture_Dev>()->Close(pp_resource());
}
void VideoCapture_Dev::AbortEnumerateDevices() {
if (enum_state_) {
enum_state_->devices = NULL;
Module::Get()->core()->CallOnMainThread(0, enum_state_->callback,
PP_ERROR_ABORTED);
enum_state_->video_capture = NULL;
enum_state_ = NULL;
}
}
// static
void VideoCapture_Dev::OnEnumerateDevicesComplete(void* user_data,
int32_t result) {
EnumerateDevicesState* enum_state =
static_cast<EnumerateDevicesState*>(user_data);
bool need_to_callback = !!enum_state->video_capture;
if (result == PP_OK) {
// It will take care of releasing the reference.
ResourceArray_Dev resources(ResourceArray_Dev::PassRef(),
enum_state->devices_resource);
if (need_to_callback) {
enum_state->devices->clear();
for (uint32_t index = 0; index < resources.size(); ++index) {
DeviceRef_Dev device(resources[index]);
enum_state->devices->push_back(device);
}
}
}
if (need_to_callback) {
enum_state->video_capture->enum_state_ = NULL;
enum_state->callback.Run(result);
}
delete enum_state;
}
} // namespace pp
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