Add mojo interface+impl creation of audio streams.

content/browser/renderer_host/media/render_frame_audio_output_stream_factory.cc

Index: content/browser/renderer_host/media/render_frame_audio_output_stream_factory.cc
diff --git a/content/browser/renderer_host/media/render_frame_audio_output_stream_factory.cc b/content/browser/renderer_host/media/render_frame_audio_output_stream_factory.cc
new file mode 100644
index 0000000000000000000000000000000000000000..5ebd4a691a703c37da0474876f43befd3c0ec4b3
--- /dev/null
+++ b/content/browser/renderer_host/media/render_frame_audio_output_stream_factory.cc
@@ -0,0 +1,144 @@
+// Copyright 2017 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 "content/browser/renderer_host/media/render_frame_audio_output_stream_factory.h"
+
+#include <utility>
+
+#include "base/metrics/histogram_macros.h"
+#include "base/task_runner_util.h"
+#include "base/threading/thread_checker.h"
+#include "content/browser/renderer_host/media/renderer_audio_output_stream_factory_context.h"
+#include "content/public/browser/browser_thread.h"
+#include "content/public/browser/render_frame_host.h"
+#include "media/base/audio_parameters.h"
+#include "media/mojo/services/mojo_audio_output_stream_provider.h"
+#include "mojo/public/cpp/bindings/binding.h"
+#include "mojo/public/cpp/bindings/message.h"
+
+namespace content {
+
+namespace {
+
+void UMALogDeviceAuthorizationTime(base::TimeTicks auth_start_time) {
+  UMA_HISTOGRAM_CUSTOM_TIMES("Media.Audio.OutputDeviceAuthorizationTime",
+                             base::TimeTicks::Now() - auth_start_time,
+                             base::TimeDelta::FromMilliseconds(1),
+                             base::TimeDelta::FromMilliseconds(5000), 50);
+}
+
+url::Origin GetOrigin(int process_id, int frame_id) {
+  DCHECK_CURRENTLY_ON(BrowserThread::UI);
+  RenderFrameHost* frame = RenderFrameHost::FromID(process_id, frame_id);
+  return frame ? frame->GetLastCommittedOrigin() : url::Origin();
+}
+
+}  // namespace
+
+RenderFrameAudioOutputStreamFactory::RenderFrameAudioOutputStreamFactory(
+    int render_frame_id,
+    RendererAudioOutputStreamFactoryContext* context)
+    : render_frame_id_(render_frame_id),
+      context_(context),
+      weak_ptr_factory_(this) {
+  DCHECK(context_);
+}
+
+RenderFrameAudioOutputStreamFactory::~RenderFrameAudioOutputStreamFactory() {
+  DCHECK(thread_checker_.CalledOnValidThread());
+  // Make sure to close all streams.
+  stream_providers_.clear();
+}
+
+void RenderFrameAudioOutputStreamFactory::RequestDeviceAuthorization(
+    media::mojom::AudioOutputStreamProviderRequest stream_provider_request,
+    int64_t session_id,
+    const std::string& device_id,
+    const RequestDeviceAuthorizationCallback& callback) {
+  DCHECK(thread_checker_.CalledOnValidThread());
+  const base::TimeTicks auth_start_time = base::TimeTicks::Now();
+
+  if (!base::IsValueInRangeForNumericType<int>(session_id)) {
+    mojo::ReportBadMessage("session_id is not in integer range");
+    // Note: We must call the callback even though we are killing the renderer.
+    // This is mandated by mojo.
+    callback.Run(
+        media::OutputDeviceStatus::OUTPUT_DEVICE_STATUS_ERROR_NOT_AUTHORIZED,
+        media::AudioParameters::UnavailableDeviceParams(), std::string());
+    return;
+  }
+
+  base::PostTaskAndReplyWithResult(
+      BrowserThread::GetTaskRunnerForThread(BrowserThread::UI).get(), FROM_HERE,
+      base::Bind(GetOrigin, context_->GetRenderProcessId(), render_frame_id_),
+      base::Bind(&RenderFrameAudioOutputStreamFactory::
+                     RequestDeviceAuthorizationForOrigin,
+                 weak_ptr_factory_.GetWeakPtr(), auth_start_time,
+                 base::Passed(&stream_provider_request),
+                 static_cast<int>(session_id), device_id, callback));
+}
+
+void RenderFrameAudioOutputStreamFactory::RequestDeviceAuthorizationForOrigin(
+    base::TimeTicks auth_start_time,
+    media::mojom::AudioOutputStreamProviderRequest stream_provider_request,
+    int session_id,
+    const std::string& device_id,
+    const RequestDeviceAuthorizationCallback& callback,
+    const url::Origin& origin) {
+  DCHECK(thread_checker_.CalledOnValidThread());
+  context_->RequestDeviceAuthorization(
+      render_frame_id_, session_id, device_id, origin,
+      base::Bind(&RenderFrameAudioOutputStreamFactory::AuthorizationCompleted,
+                 weak_ptr_factory_.GetWeakPtr(), auth_start_time,
+                 base::Passed(&stream_provider_request), callback, origin));
+}
+
+void RenderFrameAudioOutputStreamFactory::AuthorizationCompleted(
+    base::TimeTicks auth_start_time,
+    media::mojom::AudioOutputStreamProviderRequest request,
+    const RequestDeviceAuthorizationCallback& callback,
+    const url::Origin& origin,
+    media::OutputDeviceStatus status,
+    bool should_send_id,
+    const media::AudioParameters& params,
+    const std::string& raw_device_id) {
+  DCHECK(thread_checker_.CalledOnValidThread());
+  UMALogDeviceAuthorizationTime(auth_start_time);
+
+  if (status != media::OUTPUT_DEVICE_STATUS_OK) {
+    callback.Run(media::OutputDeviceStatus(status),
+                 media::AudioParameters::UnavailableDeviceParams(),
+                 std::string());
+    return;
+  }
+
+  // Since |context_| outlives |this| and |this| outlives |stream_providers_|,
+  // unretained is safe.
+  stream_providers_.insert(
+      base::MakeUnique<media::MojoAudioOutputStreamProvider>(
+          std::move(request),
+          base::BindOnce(
+              &RendererAudioOutputStreamFactoryContext::CreateDelegate,
+              base::Unretained(context_), raw_device_id, render_frame_id_),
+          base::Bind(&RenderFrameAudioOutputStreamFactory::RemoveStream,
+                     base::Unretained(this))));
+
+  callback.Run(media::OutputDeviceStatus(status), params,
+               should_send_id
+                   ? context_->GetHMACForDeviceId(origin, raw_device_id)
+                   : std::string());
+}
+
+void RenderFrameAudioOutputStreamFactory::RemoveStream(
+    media::mojom::AudioOutputStreamProvider* stream_provider) {
+  DCHECK(thread_checker_.CalledOnValidThread());
+
+  base::EraseIf(
+      stream_providers_,
+      [stream_provider](
+          const std::unique_ptr<media::mojom::AudioOutputStreamProvider>&
+              other) { return other.get() == stream_provider; });
+}
+
+}  // namespace content