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/*
* Copyright (C) 2012, Google Inc. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
* CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH
* DAMAGE.
*/
#include "third_party/blink/renderer/modules/webaudio/media_stream_audio_source_node.h"
#include <inttypes.h>
#include "third_party/blink/public/platform/modules/webrtc/webrtc_logging.h"
#include "third_party/blink/renderer/bindings/modules/v8/v8_media_stream_audio_source_options.h"
#include "third_party/blink/renderer/modules/webaudio/audio_context.h"
#include "third_party/blink/renderer/modules/webaudio/audio_graph_tracer.h"
#include "third_party/blink/renderer/modules/webaudio/media_stream_audio_source_handler.h"
namespace blink {
MediaStreamAudioSourceNode::MediaStreamAudioSourceNode(
AudioContext& context,
MediaStream& media_stream,
MediaStreamTrack* audio_track,
std::unique_ptr<AudioSourceProvider> audio_source_provider)
: AudioNode(context),
ActiveScriptWrappable<MediaStreamAudioSourceNode>({}),
audio_track_(audio_track),
media_stream_(media_stream) {
SetHandler(MediaStreamAudioSourceHandler::Create(
*this, std::move(audio_source_provider)));
SendLogMessage(
__func__,
String::Format(
"({audio_track=[kind: %s, id: "
"%s, label: %s, enabled: "
"%d, muted: %d]}, {handler=0x%" PRIXPTR "}, [this=0x%" PRIXPTR "])",
audio_track->kind().Utf8().c_str(), audio_track->id().Utf8().c_str(),
audio_track->label().Utf8().c_str(), audio_track->enabled(),
audio_track->muted(), reinterpret_cast<uintptr_t>(&Handler()),
reinterpret_cast<uintptr_t>(this)));
}
MediaStreamAudioSourceNode* MediaStreamAudioSourceNode::Create(
AudioContext& context,
MediaStream& media_stream,
ExceptionState& exception_state) {
DCHECK(IsMainThread());
// TODO(crbug.com/1055983): Remove this when the execution context validity
// check is not required in the AudioNode factory methods.
if (!context.CheckExecutionContextAndThrowIfNecessary(exception_state)) {
return nullptr;
}
// The constructor algorithm:
// https://webaudio.github.io/web-audio-api/#mediastreamaudiosourcenode
// 1.24.1. Step 1 & 2.
MediaStreamTrackVector audio_tracks = media_stream.getAudioTracks();
if (audio_tracks.empty()) {
exception_state.ThrowDOMException(DOMExceptionCode::kInvalidStateError,
"MediaStream has no audio track");
return nullptr;
}
// 1.24.1. Step 3: Sort the elements in tracks based on their id attribute
// using an ordering on sequences of code unit values.
// (See: https://infra.spec.whatwg.org/#code-unit)
MediaStreamTrack* audio_track = audio_tracks[0];
for (auto track : audio_tracks) {
if (CodeUnitCompareLessThan(track->id(), audio_track->id())) {
audio_track = track;
}
}
// 1.24.1. Step 5: The step is out of order because the constructor needs
// this provider, which is [[input track]] from the spec.
std::unique_ptr<AudioSourceProvider> provider =
audio_track->CreateWebAudioSource(context.sampleRate(),
context.PlatformBufferDuration());
// 1.24.1. Step 4.
MediaStreamAudioSourceNode* node =
MakeGarbageCollected<MediaStreamAudioSourceNode>(
context, media_stream, audio_track, std::move(provider));
// Initializes the node with the stereo output channel.
node->SetFormat(2, context.sampleRate());
// Lets the context know this source node started.
context.NotifySourceNodeStartedProcessing(node);
return node;
}
MediaStreamAudioSourceNode* MediaStreamAudioSourceNode::Create(
AudioContext* context,
const MediaStreamAudioSourceOptions* options,
ExceptionState& exception_state) {
return Create(*context, *options->mediaStream(), exception_state);
}
void MediaStreamAudioSourceNode::SetFormat(uint32_t number_of_channels,
float source_sample_rate) {
GetMediaStreamAudioSourceHandler().SetFormat(number_of_channels,
source_sample_rate);
}
void MediaStreamAudioSourceNode::ReportDidCreate() {
GraphTracer().DidCreateAudioNode(this);
}
void MediaStreamAudioSourceNode::ReportWillBeDestroyed() {
GraphTracer().WillDestroyAudioNode(this);
}
bool MediaStreamAudioSourceNode::HasPendingActivity() const {
// The node stays alive as long as the context is running. It also will not
// be collected until the context is suspended or stopped.
// (See https://crbug.com/937231)
return context()->ContextState() == V8AudioContextState::Enum::kRunning;
}
void MediaStreamAudioSourceNode::Trace(Visitor* visitor) const {
visitor->Trace(audio_track_);
visitor->Trace(media_stream_);
AudioSourceProviderClient::Trace(visitor);
AudioNode::Trace(visitor);
}
MediaStreamAudioSourceHandler&
MediaStreamAudioSourceNode::GetMediaStreamAudioSourceHandler() const {
return static_cast<MediaStreamAudioSourceHandler&>(Handler());
}
void MediaStreamAudioSourceNode::SendLogMessage(const char* const function_name,
const String& message) {
WebRtcLogMessage(
String::Format("[WA]MSASN::%s %s", function_name, message.Utf8().c_str())
.Utf8());
}
} // namespace blink
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