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// Copyright 2012 The Chromium Authors
// 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/audio_input_device_manager.h"
#include <memory>
#include <utility>
#include "base/command_line.h"
#include "base/functional/bind.h"
#include "base/functional/callback.h"
#include "base/metrics/histogram_macros.h"
#include "base/observer_list.h"
#include "base/strings/stringprintf.h"
#include "build/build_config.h"
#include "content/browser/renderer_host/media/media_stream_manager.h"
#include "content/public/browser/browser_task_traits.h"
#include "content/public/browser/browser_thread.h"
#include "media/audio/audio_input_ipc.h"
#include "media/audio/audio_system.h"
#include "media/base/audio_parameters.h"
#include "media/base/channel_layout.h"
#include "media/base/media_switches.h"
#include "third_party/blink/public/common/mediastream/media_stream_request.h"
#include "third_party/blink/public/mojom/mediastream/media_stream.mojom-shared.h"
namespace content {
namespace {
void SendAudioLogMessage(const std::string& message) {
MediaStreamManager::SendMessageToNativeLog("AIDM::" + message);
}
const char* TypeToString(blink::mojom::MediaStreamType type) {
DCHECK(blink::IsAudioInputMediaType(type));
switch (type) {
case blink::mojom::MediaStreamType::DEVICE_AUDIO_CAPTURE:
return "DEVICE_AUDIO_CAPTURE";
case blink::mojom::MediaStreamType::GUM_TAB_AUDIO_CAPTURE:
return "GUM_TAB_AUDIO_CAPTURE";
case blink::mojom::MediaStreamType::GUM_DESKTOP_AUDIO_CAPTURE:
return "GUM_DESKTOP_AUDIO_CAPTURE";
case blink::mojom::MediaStreamType::DISPLAY_AUDIO_CAPTURE:
return "DISPLAY_AUDIO_CAPTURE";
default:
NOTREACHED();
}
}
std::string GetOpenLogString(const base::UnguessableToken& session_id,
const blink::MediaStreamDevice& device) {
std::string str = base::StringPrintf("Open({session_id=%s}, ",
session_id.ToString().c_str());
base::StringAppendF(&str, "{device=[type: %s, ", TypeToString(device.type));
base::StringAppendF(&str, "id: %s, ", device.id.c_str());
if (device.group_id.has_value()) {
base::StringAppendF(&str, "group_id: %s, ",
device.group_id.value().c_str());
}
if (device.matched_output_device_id.has_value()) {
base::StringAppendF(&str, "matched_output_device_id: %s, ",
device.matched_output_device_id.value().c_str());
}
base::StringAppendF(&str, "name: %s", device.name.c_str());
if (blink::IsAudioInputMediaType(device.type)) {
base::StringAppendF(&str, ", parameters: [%s",
device.input.AsHumanReadableString().c_str());
}
str += "]]})";
return str;
}
} // namespace
AudioInputDeviceManager::AudioInputDeviceManager(
media::AudioSystem* audio_system)
: audio_system_(audio_system) {}
AudioInputDeviceManager::~AudioInputDeviceManager() {
}
const blink::MediaStreamDevice* AudioInputDeviceManager::GetOpenedDeviceById(
const base::UnguessableToken& session_id) {
DCHECK_CURRENTLY_ON(BrowserThread::IO);
auto device = GetDevice(session_id);
if (device == devices_.end())
return nullptr;
return &(*device);
}
void AudioInputDeviceManager::RegisterListener(
MediaStreamProviderListener* listener) {
DCHECK_CURRENTLY_ON(BrowserThread::IO);
DCHECK(listener);
listeners_.AddObserver(listener);
}
void AudioInputDeviceManager::UnregisterListener(
MediaStreamProviderListener* listener) {
DCHECK_CURRENTLY_ON(BrowserThread::IO);
DCHECK(listener);
listeners_.RemoveObserver(listener);
}
base::UnguessableToken AudioInputDeviceManager::Open(
const blink::MediaStreamDevice& device) {
DCHECK_CURRENTLY_ON(BrowserThread::IO);
// Generate a new id for this device.
auto session_id = base::UnguessableToken::Create();
SendAudioLogMessage(GetOpenLogString(session_id, device));
// base::Unretained(this) is safe, because AudioInputDeviceManager is
// destroyed not earlier than on the IO message loop destruction.
if (base::CommandLine::ForCurrentProcess()->HasSwitch(
switches::kUseFakeDeviceForMediaStream)) {
audio_system_->GetAssociatedOutputDeviceID(
device.id, base::BindOnce(&AudioInputDeviceManager::OpenedOnIOThread,
base::Unretained(this), session_id, device,
std::optional<media::AudioParameters>()));
} else {
// TODO(tommi): As is, we hit this code path when device.type is
// MEDIA_GUM_TAB_AUDIO_CAPTURE and the device id is not a device that
// the AudioManager can know about. This currently does not fail because
// the implementation of GetInputStreamParameters returns valid parameters
// by default for invalid devices. That behavior is problematic because it
// causes other parts of the code to attempt to open truly invalid or
// missing devices and falling back on alternate devices (and likely fail
// twice in a row). Tab audio capture should not pass through here and
// GetInputStreamParameters should return invalid parameters for invalid
// devices.
audio_system_->GetInputDeviceInfo(
device.id, base::BindOnce(&AudioInputDeviceManager::OpenedOnIOThread,
base::Unretained(this), session_id, device));
}
return session_id;
}
void AudioInputDeviceManager::Close(const base::UnguessableToken& session_id) {
DCHECK_CURRENTLY_ON(BrowserThread::IO);
SendAudioLogMessage("Close({session_id=" + session_id.ToString() + "})");
auto device = GetDevice(session_id);
if (device == devices_.end())
return;
const blink::mojom::MediaStreamType stream_type = device->type;
devices_.erase(device);
// Post a callback through the listener on IO thread since
// MediaStreamManager is expecting the callback asynchronously.
GetIOThreadTaskRunner({})->PostTask(
FROM_HERE, base::BindOnce(&AudioInputDeviceManager::ClosedOnIOThread,
this, stream_type, session_id));
}
void AudioInputDeviceManager::OpenedOnIOThread(
const base::UnguessableToken& session_id,
const blink::MediaStreamDevice& device,
const std::optional<media::AudioParameters>& input_params,
const std::optional<std::string>& matched_output_device_id) {
DCHECK_CURRENTLY_ON(BrowserThread::IO);
DCHECK(GetDevice(session_id) == devices_.end());
DCHECK(!input_params || input_params->IsValid());
DCHECK(!matched_output_device_id || !matched_output_device_id->empty());
SendAudioLogMessage("Opened({session_id=" + session_id.ToString() + "})");
blink::MediaStreamDevice media_stream_device(device.type, device.id,
device.name);
media_stream_device.set_session_id(session_id);
media_stream_device.input =
input_params.value_or(media::AudioParameters::UnavailableDeviceParams());
media_stream_device.matched_output_device_id = matched_output_device_id;
DCHECK(media_stream_device.input.IsValid());
devices_.push_back(media_stream_device);
for (auto& listener : listeners_)
listener.Opened(media_stream_device.type, session_id);
}
void AudioInputDeviceManager::ClosedOnIOThread(
blink::mojom::MediaStreamType stream_type,
const base::UnguessableToken& session_id) {
DCHECK_CURRENTLY_ON(BrowserThread::IO);
SendAudioLogMessage("Closed({session_id=" + session_id.ToString() + "})");
for (auto& listener : listeners_)
listener.Closed(stream_type, session_id);
}
blink::MediaStreamDevices::iterator AudioInputDeviceManager::GetDevice(
const base::UnguessableToken& session_id) {
for (auto it = devices_.begin(); it != devices_.end(); ++it) {
if (it->session_id() == session_id)
return it;
}
return devices_.end();
}
} // namespace content
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