Image Capture: cache constraints and append them to MediaStreamTrack.getConstraints()

third_party/WebKit/Source/modules/imagecapture/ImageCapture.cpp

 // Copyright 2016 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 "modules/imagecapture/ImageCapture.h"
 
 #include "bindings/core/v8/CallbackPromiseAdapter.h"
 #include "bindings/core/v8/ScriptPromiseResolver.h"
 #include "core/dom/DOMException.h"
 #include "core/dom/ExceptionCode.h"
 #include "core/fileapi/Blob.h"
 #include "core/frame/ImageBitmap.h"
 #include "modules/EventTargetModules.h"
 #include "modules/imagecapture/MediaSettingsRange.h"
 #include "modules/imagecapture/PhotoCapabilities.h"
 #include "modules/imagecapture/PhotoSettings.h"
 #include "modules/mediastream/MediaStreamTrack.h"
 #include "modules/mediastream/MediaTrackCapabilities.h"
-#include "modules/mediastream/MediaTrackConstraintSet.h"
 #include "platform/WaitableEvent.h"
 #include "platform/mojo/MojoHelper.h"
 #include "public/platform/InterfaceProvider.h"
 #include "public/platform/Platform.h"
 #include "public/platform/WebImageCaptureFrameGrabber.h"
 #include "public/platform/WebMediaStreamTrack.h"
 #include "wtf/PtrUtil.h"
 
 namespace blink {
 
@@ skipping 263 matching lines @@
   }
   m_serviceRequests.insert(resolver);
 
   auto settings = media::mojom::blink::PhotoSettings::New();
 
   // TODO(mcasas): support other Mode types beyond simple string i.e. the
   // equivalents of "sequence<DOMString>"" or "ConstrainDOMStringParameters".
   settings->has_white_balance_mode = constraints.hasWhiteBalanceMode() &&
                                      constraints.whiteBalanceMode().isString();
   if (settings->has_white_balance_mode) {
+    m_currentConstraints.setWhiteBalanceMode(constraints.whiteBalanceMode());
     settings->white_balance_mode =
         parseMeteringMode(constraints.whiteBalanceMode().getAsString());
   }
   settings->has_exposure_mode =
       constraints.hasExposureMode() && constraints.exposureMode().isString();
   if (settings->has_exposure_mode) {
+    m_currentConstraints.setExposureMode(constraints.exposureMode());
     settings->exposure_mode =
         parseMeteringMode(constraints.exposureMode().getAsString());
   }
 
   settings->has_focus_mode =
       constraints.hasFocusMode() && constraints.focusMode().isString();
   if (settings->has_focus_mode) {
+    m_currentConstraints.setFocusMode(constraints.focusMode());
     settings->focus_mode =
         parseMeteringMode(constraints.focusMode().getAsString());
   }
 
   // TODO(mcasas): support ConstrainDoubleRange where applicable.
   settings->has_exposure_compensation =
       constraints.hasExposureCompensation() &&
       constraints.exposureCompensation().isDouble();
   if (settings->has_exposure_compensation) {
+    m_currentConstraints.setExposureCompensation(
+        constraints.exposureCompensation());
     settings->exposure_compensation =
         constraints.exposureCompensation().getAsDouble();
   }
   settings->has_color_temperature = constraints.hasColorTemperature() &&
                                     constraints.colorTemperature().isDouble();
-  if (settings->has_color_temperature)
+  if (settings->has_color_temperature) {
+    m_currentConstraints.setColorTemperature(constraints.colorTemperature());
     settings->color_temperature = constraints.colorTemperature().getAsDouble();
+  }
   settings->has_iso = constraints.hasIso() && constraints.iso().isDouble();
-  if (settings->has_iso)
+  if (settings->has_iso) {
+    m_currentConstraints.setIso(constraints.iso());
     settings->iso = constraints.iso().getAsDouble();
+  }
 
   settings->has_brightness =
       constraints.hasBrightness() && constraints.brightness().isDouble();
-  if (settings->has_brightness)
+  if (settings->has_brightness) {
+    m_currentConstraints.setBrightness(constraints.brightness());
     settings->brightness = constraints.brightness().getAsDouble();
+  }
   settings->has_contrast =
       constraints.hasContrast() && constraints.contrast().isDouble();
-  if (settings->has_contrast)
+  if (settings->has_contrast) {
+    m_currentConstraints.setContrast(constraints.contrast());
     settings->contrast = constraints.contrast().getAsDouble();
+  }
   settings->has_saturation =
       constraints.hasSaturation() && constraints.saturation().isDouble();
-  if (settings->has_saturation)
+  if (settings->has_saturation) {
+    m_currentConstraints.setSaturation(constraints.saturation());
     settings->saturation = constraints.saturation().getAsDouble();
+  }
   settings->has_sharpness =
       constraints.hasSharpness() && constraints.sharpness().isDouble();
-  if (settings->has_sharpness)
+  if (settings->has_sharpness) {
+    m_currentConstraints.setSharpness(constraints.sharpness());
     settings->sharpness = constraints.sharpness().getAsDouble();
+  }
 
   settings->has_zoom = constraints.hasZoom() && constraints.zoom().isDouble();
-  if (settings->has_zoom)
+  if (settings->has_zoom) {
+    m_currentConstraints.setZoom(constraints.zoom());
     settings->zoom = constraints.zoom().getAsDouble();
+  }
 
   // TODO(mcasas): add |torch| when the mojom interface is updated,
   // https://crbug.com/700607.
 
   m_service->SetOptions(m_streamTrack->component()->source()->id(),
                         std::move(settings),
                         convertToBaseCallback(WTF::bind(
                             &ImageCapture::onSetOptions, wrapPersistent(this),
                             wrapPersistent(resolver))));
 }
 
+const MediaTrackConstraintSet& ImageCapture::getMediaTrackConstraints() const {
+  return m_currentConstraints;
+}
+
 ImageCapture::ImageCapture(ExecutionContext* context, MediaStreamTrack* track)
     : ContextLifecycleObserver(context), m_streamTrack(track) {
   DCHECK(m_streamTrack);
   DCHECK(!m_service.is_bound());
 
   Platform::current()->interfaceProvider()->getInterface(
       mojo::MakeRequest(&m_service));
 
   m_service.set_connection_error_handler(convertToBaseCallback(WTF::bind(
       &ImageCapture::onServiceConnectionError, wrapWeakPersistent(this))));
@@ skipping 142 matching lines @@
 
 DEFINE_TRACE(ImageCapture) {
   visitor->trace(m_streamTrack);
   visitor->trace(m_capabilities);
   visitor->trace(m_serviceRequests);
   EventTargetWithInlineData::trace(visitor);
   ContextLifecycleObserver::trace(visitor);
 }
 
 }  // namespace blink