Hidenori Matsubayashi
34feab80cc
Changes: * Source code refactoring * Add temporary code for camera image stream APIs
73 lines
2.8 KiB
C++
73 lines
2.8 KiB
C++
// Copyright 2021 Sony Group Corporation. All rights reserved.
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// Copyright 2013 The Flutter Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style license that can be
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// found in the LICENSE file.
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#include "channels/event_channel_image_stream.h"
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#include <flutter/event_stream_handler_functions.h>
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#include <flutter/standard_method_codec.h>
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#include <vector>
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namespace {
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constexpr char kChannelName[] = "plugins.flutter.io/camera/imageStream";
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// See: [getFormat()] in
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// https://developer.android.com/reference/android/media/Image
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constexpr int32_t kImageFormatRGBA8888 = 4;
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}; // namespace
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EventChannelImageStream::EventChannelImageStream(
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flutter::PluginRegistrar* registrar) {
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auto event_channel =
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std::make_unique<flutter::EventChannel<flutter::EncodableValue>>(
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registrar->messenger(), kChannelName,
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&flutter::StandardMethodCodec::GetInstance());
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auto event_channel_handler = std::make_unique<
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flutter::StreamHandlerFunctions<flutter::EncodableValue>>(
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[this](
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const flutter::EncodableValue* arguments,
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std::unique_ptr<flutter::EventSink<flutter::EncodableValue>>&& events)
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-> std::unique_ptr<
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flutter::StreamHandlerError<flutter::EncodableValue>> {
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event_sink_ = std::move(events);
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return nullptr;
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},
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[this](const flutter::EncodableValue* arguments)
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-> std::unique_ptr<
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flutter::StreamHandlerError<flutter::EncodableValue>> {
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event_sink_ = nullptr;
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return nullptr;
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});
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event_channel->SetStreamHandler(std::move(event_channel_handler));
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}
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// See: [setImageStreamImageAvailableListener] in
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// flutter/plugins/packages/camera/camera/android/src/main/java/io/flutter/plugins/camera/Camera.java
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void EventChannelImageStream::Send(const int32_t& width, const int32_t& height,
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const uint8_t* pixels) {
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const uint32_t len = width * 4 * height;
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std::vector<uint8_t> bytes(pixels, pixels + len);
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flutter::EncodableList planes;
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flutter::EncodableMap plane = {
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{flutter::EncodableValue("bytesPerRow"), flutter::EncodableValue(width)},
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{flutter::EncodableValue("bytesPerPixel"), flutter::EncodableValue(4)},
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{flutter::EncodableValue("bytes"), flutter::EncodableValue(bytes)},
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};
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flutter::EncodableValue plane_value(plane);
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planes.push_back(plane_value);
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flutter::EncodableMap encodables = {
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{flutter::EncodableValue("width"), flutter::EncodableValue(width)},
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{flutter::EncodableValue("height"), flutter::EncodableValue(height)},
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{flutter::EncodableValue("format"),
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flutter::EncodableValue(kImageFormatRGBA8888)},
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{flutter::EncodableValue("planes"), flutter::EncodableValue(planes)}};
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flutter::EncodableValue event(encodables);
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event_sink_->Success(event);
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}
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