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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 "content/browser/media/media_internals.h"
#include "base/strings/string16.h"
#include "base/strings/stringprintf.h"
#include "content/public/browser/browser_thread.h"
#include "content/public/browser/web_ui.h"
#include "media/audio/audio_parameters.h"
#include "media/base/media_log.h"
#include "media/base/media_log_event.h"
namespace {
static base::LazyInstance<content::MediaInternals>::Leaky g_media_internals =
LAZY_INSTANCE_INITIALIZER;
base::string16 SerializeUpdate(const std::string& function,
const base::Value* value) {
return content::WebUI::GetJavascriptCall(
function, std::vector<const base::Value*>(1, value));
}
const char kAudioLogStatusKey[] = "status";
const char kAudioLogUpdateFunction[] = "media.updateAudioComponent";
} // namespace
namespace content {
class AudioLogImpl : public media::AudioLog {
public:
AudioLogImpl(int owner_id,
media::AudioLogFactory::AudioComponent component,
content::MediaInternals* media_internals);
virtual ~AudioLogImpl();
virtual void OnCreated(int component_id,
const media::AudioParameters& params,
const std::string& input_device_id,
const std::string& output_device_id) OVERRIDE;
virtual void OnStarted(int component_id) OVERRIDE;
virtual void OnStopped(int component_id) OVERRIDE;
virtual void OnClosed(int component_id) OVERRIDE;
virtual void OnError(int component_id) OVERRIDE;
virtual void OnSetVolume(int component_id, double volume) OVERRIDE;
private:
void SendSingleStringUpdate(int component_id,
const std::string& key,
const std::string& value);
void StoreComponentMetadata(int component_id, base::DictionaryValue* dict);
std::string FormatCacheKey(int component_id);
const int owner_id_;
const media::AudioLogFactory::AudioComponent component_;
content::MediaInternals* const media_internals_;
DISALLOW_COPY_AND_ASSIGN(AudioLogImpl);
};
AudioLogImpl::AudioLogImpl(int owner_id,
media::AudioLogFactory::AudioComponent component,
content::MediaInternals* media_internals)
: owner_id_(owner_id),
component_(component),
media_internals_(media_internals) {}
AudioLogImpl::~AudioLogImpl() {}
void AudioLogImpl::OnCreated(int component_id,
const media::AudioParameters& params,
const std::string& input_device_id,
const std::string& output_device_id) {
base::DictionaryValue dict;
StoreComponentMetadata(component_id, &dict);
dict.SetString(kAudioLogStatusKey, "created");
dict.SetString("input_device_id", input_device_id);
dict.SetInteger("input_channels", params.input_channels());
dict.SetInteger("frames_per_buffer", params.frames_per_buffer());
dict.SetInteger("sample_rate", params.sample_rate());
dict.SetString("output_device_id", output_device_id);
dict.SetInteger("channels", params.channels());
dict.SetString("channel_layout",
ChannelLayoutToString(params.channel_layout()));
media_internals_->SendUpdateAndCache(
FormatCacheKey(component_id), kAudioLogUpdateFunction, &dict);
}
void AudioLogImpl::OnStarted(int component_id) {
SendSingleStringUpdate(component_id, kAudioLogStatusKey, "started");
}
void AudioLogImpl::OnStopped(int component_id) {
SendSingleStringUpdate(component_id, kAudioLogStatusKey, "stopped");
}
void AudioLogImpl::OnClosed(int component_id) {
base::DictionaryValue dict;
StoreComponentMetadata(component_id, &dict);
dict.SetString(kAudioLogStatusKey, "closed");
media_internals_->SendUpdateAndPurgeCache(
FormatCacheKey(component_id), kAudioLogUpdateFunction, &dict);
}
void AudioLogImpl::OnError(int component_id) {
SendSingleStringUpdate(component_id, "error_occurred", "true");
}
void AudioLogImpl::OnSetVolume(int component_id, double volume) {
base::DictionaryValue dict;
StoreComponentMetadata(component_id, &dict);
dict.SetDouble("volume", volume);
media_internals_->SendUpdateAndCache(
FormatCacheKey(component_id), kAudioLogUpdateFunction, &dict);
}
std::string AudioLogImpl::FormatCacheKey(int component_id) {
return base::StringPrintf("%d:%d:%d", owner_id_, component_, component_id);
}
void AudioLogImpl::SendSingleStringUpdate(int component_id,
const std::string& key,
const std::string& value) {
base::DictionaryValue dict;
StoreComponentMetadata(component_id, &dict);
dict.SetString(key, value);
media_internals_->SendUpdateAndCache(
FormatCacheKey(component_id), kAudioLogUpdateFunction, &dict);
}
void AudioLogImpl::StoreComponentMetadata(int component_id,
base::DictionaryValue* dict) {
dict->SetInteger("owner_id", owner_id_);
dict->SetInteger("component_id", component_id);
dict->SetInteger("component_type", component_);
}
MediaInternals* MediaInternals::GetInstance() {
return g_media_internals.Pointer();
}
MediaInternals::MediaInternals() : owner_ids_() {}
MediaInternals::~MediaInternals() {}
void MediaInternals::OnMediaEvents(
int render_process_id, const std::vector<media::MediaLogEvent>& events) {
DCHECK(BrowserThread::CurrentlyOn(BrowserThread::IO));
// Notify observers that |event| has occurred.
for (std::vector<media::MediaLogEvent>::const_iterator event = events.begin();
event != events.end(); ++event) {
base::DictionaryValue dict;
dict.SetInteger("renderer", render_process_id);
dict.SetInteger("player", event->id);
dict.SetString("type", media::MediaLog::EventTypeToString(event->type));
// TODO(dalecurtis): This is technically not correct. TimeTicks "can't" be
// converted to to a human readable time format. See base/time/time.h.
const double ticks = event->time.ToInternalValue();
const double ticks_millis = ticks / base::Time::kMicrosecondsPerMillisecond;
dict.SetDouble("ticksMillis", ticks_millis);
dict.Set("params", event->params.DeepCopy());
SendUpdate(SerializeUpdate("media.onMediaEvent", &dict));
}
}
void MediaInternals::AddUpdateCallback(const UpdateCallback& callback) {
DCHECK(BrowserThread::CurrentlyOn(BrowserThread::IO));
update_callbacks_.push_back(callback);
}
void MediaInternals::RemoveUpdateCallback(const UpdateCallback& callback) {
DCHECK(BrowserThread::CurrentlyOn(BrowserThread::IO));
for (size_t i = 0; i < update_callbacks_.size(); ++i) {
if (update_callbacks_[i].Equals(callback)) {
update_callbacks_.erase(update_callbacks_.begin() + i);
return;
}
}
NOTREACHED();
}
void MediaInternals::SendEverything() {
base::string16 everything_update;
{
base::AutoLock auto_lock(lock_);
everything_update = SerializeUpdate(
"media.onReceiveEverything", &cached_data_);
}
SendUpdate(everything_update);
}
void MediaInternals::SendUpdate(const base::string16& update) {
// SendUpdate() may be called from any thread, but must run on the IO thread.
// TODO(dalecurtis): This is pretty silly since the update callbacks simply
// forward the calls to the UI thread. We should avoid the extra hop.
if (!BrowserThread::CurrentlyOn(BrowserThread::IO)) {
BrowserThread::PostTask(BrowserThread::IO, FROM_HERE, base::Bind(
&MediaInternals::SendUpdate, base::Unretained(this), update));
return;
}
for (size_t i = 0; i < update_callbacks_.size(); i++)
update_callbacks_[i].Run(update);
}
scoped_ptr<media::AudioLog> MediaInternals::CreateAudioLog(
AudioComponent component) {
base::AutoLock auto_lock(lock_);
return scoped_ptr<media::AudioLog>(new AudioLogImpl(
owner_ids_[component]++, component, this));
}
void MediaInternals::SendUpdateAndCache(const std::string& cache_key,
const std::string& function,
const base::DictionaryValue* value) {
SendUpdate(SerializeUpdate(function, value));
base::AutoLock auto_lock(lock_);
if (!cached_data_.HasKey(cache_key)) {
cached_data_.Set(cache_key, value->DeepCopy());
return;
}
base::DictionaryValue* existing_dict = NULL;
CHECK(cached_data_.GetDictionary(cache_key, &existing_dict));
existing_dict->MergeDictionary(value);
}
void MediaInternals::SendUpdateAndPurgeCache(
const std::string& cache_key,
const std::string& function,
const base::DictionaryValue* value) {
SendUpdate(SerializeUpdate(function, value));
base::AutoLock auto_lock(lock_);
scoped_ptr<base::Value> out_value;
CHECK(cached_data_.Remove(cache_key, &out_value));
}
} // namespace content
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