Source code
Revision control
Copy as Markdown
Other Tools
/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* vim:set ts=2 sw=2 sts=2 et cindent: */
/* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
#include "CubebUtils.h"
#include "audio_thread_priority.h"
#include "mozilla/AbstractThread.h"
#include "mozilla/dom/ContentChild.h"
#include "mozilla/glean/GleanMetrics.h"
#include "mozilla/ipc/FileDescriptor.h"
#include "mozilla/Logging.h"
#include "mozilla/Preferences.h"
#include "mozilla/Components.h"
#include "mozilla/SharedThreadPool.h"
#include "mozilla/Sprintf.h"
#include "mozilla/StaticMutex.h"
#include "mozilla/StaticPtr.h"
#include "mozilla/Telemetry.h"
#include "mozilla/UnderrunHandler.h"
#include "nsContentUtils.h"
#include "nsDebug.h"
#include "nsIStringBundle.h"
#include "nsString.h"
#include "nsThreadUtils.h"
#include "prdtoa.h"
#include <algorithm>
#include <stdint.h>
#ifdef MOZ_WIDGET_ANDROID
# include "mozilla/java/GeckoAppShellWrappers.h"
#endif
#ifdef XP_WIN
# include "mozilla/mscom/EnsureMTA.h"
#endif
#include "audioipc2_server_ffi_generated.h"
#include "audioipc2_client_ffi_generated.h"
#include <cmath>
#include <thread>
#include "CallbackThreadRegistry.h"
#include "mozilla/StaticPrefs_media.h"
#define AUDIOIPC_STACK_SIZE_DEFAULT (64 * 4096)
#define PREF_VOLUME_SCALE "media.volume_scale"
#define PREF_CUBEB_BACKEND "media.cubeb.backend"
#define PREF_CUBEB_OUTPUT_DEVICE "media.cubeb.output_device"
#define PREF_CUBEB_LATENCY_PLAYBACK "media.cubeb_latency_playback_ms"
#define PREF_CUBEB_LATENCY_MTG "media.cubeb_latency_mtg_frames"
// Allows to get something non-default for the preferred sample-rate, to allow
// troubleshooting in the field and testing.
#define PREF_CUBEB_FORCE_SAMPLE_RATE "media.cubeb.force_sample_rate"
#define PREF_CUBEB_LOGGING_LEVEL "logging.cubeb"
// Hidden pref used by tests to force failure to obtain cubeb context
#define PREF_CUBEB_FORCE_NULL_CONTEXT "media.cubeb.force_null_context"
#define PREF_CUBEB_OUTPUT_VOICE_ROUTING "media.cubeb.output_voice_routing"
#define PREF_CUBEB_SANDBOX "media.cubeb.sandbox"
#define PREF_AUDIOIPC_STACK_SIZE "media.audioipc.stack_size"
#define PREF_AUDIOIPC_SHM_AREA_SIZE "media.audioipc.shm_area_size"
#if defined(XP_LINUX) || defined(XP_MACOSX) || defined(XP_WIN)
# define MOZ_CUBEB_REMOTING
#endif
namespace mozilla {
namespace {
using Telemetry::LABELS_MEDIA_AUDIO_BACKEND;
using Telemetry::LABELS_MEDIA_AUDIO_INIT_FAILURE;
LazyLogModule gCubebLog("cubeb");
void CubebLogCallback(const char* aFmt, ...) {
char buffer[1024];
va_list arglist;
va_start(arglist, aFmt);
VsprintfLiteral(buffer, aFmt, arglist);
MOZ_LOG(gCubebLog, LogLevel::Error, ("%s", buffer));
va_end(arglist);
}
// This mutex protects the variables below.
StaticMutex sMutex;
enum class CubebState {
Uninitialized = 0,
Initialized,
Shutdown
} sCubebState = CubebState::Uninitialized;
StaticRefPtr<CubebUtils::CubebHandle> sCubebHandle;
double sVolumeScale = 1.0;
uint32_t sCubebPlaybackLatencyInMilliseconds = 100;
uint32_t sCubebMTGLatencyInFrames = 512;
// If sCubebForcedSampleRate is zero, PreferredSampleRate will return the
// preferred sample-rate for the audio backend in use. Otherwise, it will be
// used as the preferred sample-rate.
Atomic<uint32_t> sCubebForcedSampleRate{0};
bool sCubebPlaybackLatencyPrefSet = false;
bool sCubebMTGLatencyPrefSet = false;
bool sAudioStreamInitEverSucceeded = false;
bool sCubebForceNullContext = false;
bool sRouteOutputAsVoice = false;
#ifdef MOZ_CUBEB_REMOTING
bool sCubebSandbox = false;
size_t sAudioIPCStackSize;
size_t sAudioIPCShmAreaSize;
#endif
StaticAutoPtr<char> sBrandName;
StaticAutoPtr<char> sCubebBackendName;
StaticAutoPtr<char> sCubebOutputDeviceName;
#ifdef MOZ_WIDGET_ANDROID
// Counts the number of time a request for switching to global "communication
// mode" has been received. If this is > 0, global communication mode is to be
// enabled. If it is 0, the global communication mode is to be disabled.
// This allows to correctly track the global behaviour to adopt accross
// asynchronous GraphDriver changes, on Android.
int sInCommunicationCount = 0;
#endif
std::unordered_map<std::string, LABELS_MEDIA_AUDIO_BACKEND>
kTelemetryBackendLabel = {
{"audiounit", LABELS_MEDIA_AUDIO_BACKEND::audiounit},
{"audiounit-rust", LABELS_MEDIA_AUDIO_BACKEND::audiounit_rust},
{"aaudio", LABELS_MEDIA_AUDIO_BACKEND::aaudio},
{"opensl", LABELS_MEDIA_AUDIO_BACKEND::opensl},
{"wasapi", LABELS_MEDIA_AUDIO_BACKEND::wasapi},
{"winmm", LABELS_MEDIA_AUDIO_BACKEND::winmm},
{"alsa", LABELS_MEDIA_AUDIO_BACKEND::alsa},
{"jack", LABELS_MEDIA_AUDIO_BACKEND::jack},
{"oss", LABELS_MEDIA_AUDIO_BACKEND::oss},
{"pulse", LABELS_MEDIA_AUDIO_BACKEND::pulse},
{"pulse-rust", LABELS_MEDIA_AUDIO_BACKEND::pulse_rust},
{"sndio", LABELS_MEDIA_AUDIO_BACKEND::sndio},
{"sun", LABELS_MEDIA_AUDIO_BACKEND::sunaudio},
};
// Prefered samplerate, in Hz (characteristic of the hardware, mixer, platform,
// and API used).
//
// sMutex protects *initialization* of this, which must be performed from each
// thread before fetching, after which it is safe to fetch without holding the
// mutex because it is only written once per process execution (by the first
// initialization to complete). Since the init must have been called on a
// given thread before fetching the value, it's guaranteed (via the mutex) that
// sufficient memory barriers have occurred to ensure the correct value is
// visible on the querying thread/CPU.
static Atomic<uint32_t> sPreferredSampleRate{0};
#ifdef MOZ_CUBEB_REMOTING
// AudioIPC server handle
void* sServerHandle = nullptr;
// Initialized during early startup, protected by sMutex.
StaticAutoPtr<ipc::FileDescriptor> sIPCConnection;
static bool StartAudioIPCServer() {
if (sCubebSandbox) {
audioipc2::AudioIpcServerInitParams initParams{};
initParams.mThreadCreateCallback = [](const char* aName) {
PROFILER_REGISTER_THREAD(aName);
};
initParams.mThreadDestroyCallback = []() { PROFILER_UNREGISTER_THREAD(); };
sServerHandle = audioipc2::audioipc2_server_start(
sBrandName, sCubebBackendName, &initParams);
}
return sServerHandle != nullptr;
}
static void ShutdownAudioIPCServer() {
if (!sServerHandle) {
return;
}
audioipc2::audioipc2_server_stop(sServerHandle);
sServerHandle = nullptr;
}
#endif // MOZ_CUBEB_REMOTING
} // namespace
static const uint32_t CUBEB_NORMAL_LATENCY_MS = 100;
// Consevative default that can work on all platforms.
static const uint32_t CUBEB_NORMAL_LATENCY_FRAMES = 1024;
namespace CubebUtils {
RefPtr<CubebHandle> GetCubebUnlocked();
void GetPrefAndSetString(const char* aPref, StaticAutoPtr<char>& aStorage) {
nsAutoCString value;
Preferences::GetCString(aPref, value);
if (value.IsEmpty()) {
aStorage = nullptr;
} else {
aStorage = new char[value.Length() + 1];
PodCopy(aStorage.get(), value.get(), value.Length());
aStorage[value.Length()] = 0;
}
}
void PrefChanged(const char* aPref, void* aClosure) {
if (strcmp(aPref, PREF_VOLUME_SCALE) == 0) {
nsAutoCString value;
Preferences::GetCString(aPref, value);
StaticMutexAutoLock lock(sMutex);
if (value.IsEmpty()) {
sVolumeScale = 1.0;
} else {
sVolumeScale = std::max<double>(0, PR_strtod(value.get(), nullptr));
}
} else if (strcmp(aPref, PREF_CUBEB_LATENCY_PLAYBACK) == 0) {
StaticMutexAutoLock lock(sMutex);
// Arbitrary default stream latency of 100ms. The higher this
// value, the longer stream volume changes will take to become
// audible.
sCubebPlaybackLatencyPrefSet = Preferences::HasUserValue(aPref);
uint32_t value = Preferences::GetUint(aPref, CUBEB_NORMAL_LATENCY_MS);
sCubebPlaybackLatencyInMilliseconds =
std::min<uint32_t>(std::max<uint32_t>(value, 1), 1000);
} else if (strcmp(aPref, PREF_CUBEB_LATENCY_MTG) == 0) {
StaticMutexAutoLock lock(sMutex);
sCubebMTGLatencyPrefSet = Preferences::HasUserValue(aPref);
uint32_t value = Preferences::GetUint(aPref, CUBEB_NORMAL_LATENCY_FRAMES);
// 128 is the block size for the Web Audio API, which limits how low the
// latency can be here.
// We don't want to limit the upper limit too much, so that people can
// experiment.
sCubebMTGLatencyInFrames =
std::min<uint32_t>(std::max<uint32_t>(value, 128), 1e6);
} else if (strcmp(aPref, PREF_CUBEB_FORCE_SAMPLE_RATE) == 0) {
StaticMutexAutoLock lock(sMutex);
sCubebForcedSampleRate = Preferences::GetUint(aPref);
} else if (strcmp(aPref, PREF_CUBEB_LOGGING_LEVEL) == 0) {
LogLevel value =
ToLogLevel(Preferences::GetInt(aPref, 0 /* LogLevel::Disabled */));
if (value == LogLevel::Verbose) {
cubeb_set_log_callback(CUBEB_LOG_VERBOSE, CubebLogCallback);
} else if (value == LogLevel::Debug) {
cubeb_set_log_callback(CUBEB_LOG_NORMAL, CubebLogCallback);
} else if (value == LogLevel::Disabled) {
cubeb_set_log_callback(CUBEB_LOG_DISABLED, nullptr);
}
} else if (strcmp(aPref, PREF_CUBEB_BACKEND) == 0) {
StaticMutexAutoLock lock(sMutex);
GetPrefAndSetString(aPref, sCubebBackendName);
} else if (strcmp(aPref, PREF_CUBEB_OUTPUT_DEVICE) == 0) {
StaticMutexAutoLock lock(sMutex);
GetPrefAndSetString(aPref, sCubebOutputDeviceName);
} else if (strcmp(aPref, PREF_CUBEB_FORCE_NULL_CONTEXT) == 0) {
StaticMutexAutoLock lock(sMutex);
sCubebForceNullContext = Preferences::GetBool(aPref, false);
MOZ_LOG(gCubebLog, LogLevel::Verbose,
("%s: %s", PREF_CUBEB_FORCE_NULL_CONTEXT,
sCubebForceNullContext ? "true" : "false"));
}
#ifdef MOZ_CUBEB_REMOTING
else if (strcmp(aPref, PREF_CUBEB_SANDBOX) == 0) {
StaticMutexAutoLock lock(sMutex);
sCubebSandbox = Preferences::GetBool(aPref);
MOZ_LOG(gCubebLog, LogLevel::Verbose,
("%s: %s", PREF_CUBEB_SANDBOX, sCubebSandbox ? "true" : "false"));
} else if (strcmp(aPref, PREF_AUDIOIPC_STACK_SIZE) == 0) {
StaticMutexAutoLock lock(sMutex);
sAudioIPCStackSize = Preferences::GetUint(PREF_AUDIOIPC_STACK_SIZE,
AUDIOIPC_STACK_SIZE_DEFAULT);
} else if (strcmp(aPref, PREF_AUDIOIPC_SHM_AREA_SIZE) == 0) {
StaticMutexAutoLock lock(sMutex);
sAudioIPCShmAreaSize = Preferences::GetUint(PREF_AUDIOIPC_SHM_AREA_SIZE);
}
#endif
else if (strcmp(aPref, PREF_CUBEB_OUTPUT_VOICE_ROUTING) == 0) {
StaticMutexAutoLock lock(sMutex);
sRouteOutputAsVoice = Preferences::GetBool(aPref);
MOZ_LOG(gCubebLog, LogLevel::Verbose,
("%s: %s", PREF_CUBEB_OUTPUT_VOICE_ROUTING,
sRouteOutputAsVoice ? "true" : "false"));
}
}
bool GetFirstStream() {
static bool sFirstStream = true;
StaticMutexAutoLock lock(sMutex);
bool result = sFirstStream;
sFirstStream = false;
return result;
}
double GetVolumeScale() {
StaticMutexAutoLock lock(sMutex);
return sVolumeScale;
}
RefPtr<CubebHandle> GetCubeb() {
StaticMutexAutoLock lock(sMutex);
return GetCubebUnlocked();
}
// This is only exported when running tests.
void ForceSetCubebContext(cubeb* aCubebContext) {
RefPtr<CubebHandle> oldHandle; // For release without sMutex
StaticMutexAutoLock lock(sMutex);
oldHandle = sCubebHandle.forget();
sCubebHandle = aCubebContext ? new CubebHandle(aCubebContext) : nullptr;
sCubebState = CubebState::Initialized;
}
void SetInCommunication(bool aInCommunication) {
#ifdef MOZ_WIDGET_ANDROID
StaticMutexAutoLock lock(sMutex);
if (aInCommunication) {
sInCommunicationCount++;
} else {
MOZ_ASSERT(sInCommunicationCount > 0);
sInCommunicationCount--;
}
if (sInCommunicationCount == 1) {
java::GeckoAppShell::SetCommunicationAudioModeOn(true);
} else if (sInCommunicationCount == 0) {
java::GeckoAppShell::SetCommunicationAudioModeOn(false);
}
#endif
}
bool InitPreferredSampleRate() {
sMutex.AssertCurrentThreadOwns();
if (sPreferredSampleRate != 0) {
return true;
}
#ifdef MOZ_WIDGET_ANDROID
int rate = AndroidGetAudioOutputSampleRate();
if (rate > 0) {
sPreferredSampleRate = rate;
return true;
} else {
return false;
}
#else
RefPtr<CubebHandle> handle = GetCubebUnlocked();
if (!handle) {
return false;
}
uint32_t rate;
{
StaticMutexAutoUnlock unlock(sMutex);
if (cubeb_get_preferred_sample_rate(handle->Context(), &rate) != CUBEB_OK) {
return false;
}
}
sPreferredSampleRate = rate;
#endif
MOZ_ASSERT(sPreferredSampleRate);
return true;
}
uint32_t PreferredSampleRate(bool aShouldResistFingerprinting) {
StaticMutexAutoLock lock(sMutex);
if (sCubebForcedSampleRate) {
return sCubebForcedSampleRate;
}
if (aShouldResistFingerprinting) {
return 44100;
}
if (!InitPreferredSampleRate()) {
return 44100;
}
MOZ_ASSERT(sPreferredSampleRate);
return sPreferredSampleRate;
}
int CubebStreamInit(cubeb* context, cubeb_stream** stream,
char const* stream_name, cubeb_devid input_device,
cubeb_stream_params* input_stream_params,
cubeb_devid output_device,
cubeb_stream_params* output_stream_params,
uint32_t latency_frames, cubeb_data_callback data_callback,
cubeb_state_callback state_callback, void* user_ptr) {
uint32_t ms = StaticPrefs::media_cubeb_slow_stream_init_ms();
if (ms) {
std::this_thread::sleep_for(std::chrono::milliseconds(ms));
}
cubeb_stream_params inputParamData;
cubeb_stream_params outputParamData;
cubeb_stream_params* inputParamPtr = input_stream_params;
cubeb_stream_params* outputParamPtr = output_stream_params;
if (input_stream_params && !output_stream_params) {
inputParamData = *input_stream_params;
inputParamData.rate = llround(
static_cast<double>(StaticPrefs::media_cubeb_input_drift_factor()) *
inputParamData.rate);
MOZ_LOG(
gCubebLog, LogLevel::Info,
("CubebStreamInit input stream rate %" PRIu32, inputParamData.rate));
inputParamPtr = &inputParamData;
} else if (output_stream_params && !input_stream_params) {
outputParamData = *output_stream_params;
outputParamData.rate = llround(
static_cast<double>(StaticPrefs::media_cubeb_output_drift_factor()) *
outputParamData.rate);
MOZ_LOG(
gCubebLog, LogLevel::Info,
("CubebStreamInit output stream rate %" PRIu32, outputParamData.rate));
outputParamPtr = &outputParamData;
}
return cubeb_stream_init(
context, stream, stream_name, input_device, inputParamPtr, output_device,
outputParamPtr, latency_frames, data_callback, state_callback, user_ptr);
}
void InitBrandName() {
if (sBrandName) {
return;
}
nsAutoString brandName;
nsCOMPtr<nsIStringBundleService> stringBundleService =
mozilla::components::StringBundle::Service();
if (stringBundleService) {
nsCOMPtr<nsIStringBundle> brandBundle;
nsresult rv = stringBundleService->CreateBundle(
kBrandBundleURL, getter_AddRefs(brandBundle));
if (NS_SUCCEEDED(rv)) {
rv = brandBundle->GetStringFromName("brandShortName", brandName);
NS_WARNING_ASSERTION(
NS_SUCCEEDED(rv),
"Could not get the program name for a cubeb stream.");
}
}
NS_LossyConvertUTF16toASCII ascii(brandName);
sBrandName = new char[ascii.Length() + 1];
PodCopy(sBrandName.get(), ascii.get(), ascii.Length());
sBrandName[ascii.Length()] = 0;
}
#ifdef MOZ_CUBEB_REMOTING
void InitAudioIPCConnection() {
MOZ_ASSERT(NS_IsMainThread());
auto contentChild = dom::ContentChild::GetSingleton();
auto promise = contentChild->SendCreateAudioIPCConnection();
promise->Then(
AbstractThread::MainThread(), __func__,
[](dom::FileDescOrError&& aFD) {
StaticMutexAutoLock lock(sMutex);
MOZ_ASSERT(!sIPCConnection);
if (aFD.type() == dom::FileDescOrError::Type::TFileDescriptor) {
sIPCConnection = new ipc::FileDescriptor(std::move(aFD));
} else {
MOZ_LOG(gCubebLog, LogLevel::Error,
("SendCreateAudioIPCConnection failed: invalid FD"));
}
},
[](mozilla::ipc::ResponseRejectReason&& aReason) {
MOZ_LOG(gCubebLog, LogLevel::Error,
("SendCreateAudioIPCConnection rejected: %d", int(aReason)));
});
}
#endif
#ifdef MOZ_CUBEB_REMOTING
ipc::FileDescriptor CreateAudioIPCConnectionUnlocked() {
MOZ_ASSERT(sCubebSandbox && XRE_IsParentProcess());
if (!sServerHandle) {
MOZ_LOG(gCubebLog, LogLevel::Debug, ("Starting cubeb server..."));
if (!StartAudioIPCServer()) {
MOZ_LOG(gCubebLog, LogLevel::Error, ("audioipc_server_start failed"));
return ipc::FileDescriptor();
}
}
MOZ_LOG(gCubebLog, LogLevel::Debug,
("%s: %d", PREF_AUDIOIPC_SHM_AREA_SIZE, (int)sAudioIPCShmAreaSize));
MOZ_ASSERT(sServerHandle);
ipc::FileDescriptor::PlatformHandleType rawFD;
rawFD = audioipc2::audioipc2_server_new_client(sServerHandle,
sAudioIPCShmAreaSize);
ipc::FileDescriptor fd(rawFD);
if (!fd.IsValid()) {
MOZ_LOG(gCubebLog, LogLevel::Error, ("audioipc_server_new_client failed"));
return ipc::FileDescriptor();
}
// Close rawFD since FileDescriptor's ctor cloned it.
// TODO: Find cleaner cross-platform way to close rawFD.
# ifdef XP_WIN
CloseHandle(rawFD);
# else
close(rawFD);
# endif
return fd;
}
#endif
ipc::FileDescriptor CreateAudioIPCConnection() {
#ifdef MOZ_CUBEB_REMOTING
StaticMutexAutoLock lock(sMutex);
return CreateAudioIPCConnectionUnlocked();
#else
return ipc::FileDescriptor();
#endif
}
RefPtr<CubebHandle> GetCubebUnlocked() {
sMutex.AssertCurrentThreadOwns();
if (sCubebForceNullContext) {
// Pref set such that we should return a null context
MOZ_LOG(gCubebLog, LogLevel::Debug,
("%s: returning null context due to %s!", __func__,
PREF_CUBEB_FORCE_NULL_CONTEXT));
return nullptr;
}
if (sCubebState != CubebState::Uninitialized) {
// If we have already passed the initialization point (below), just return
// the current context, which may be null (e.g., after error or shutdown.)
return sCubebHandle;
}
if (!sBrandName && NS_IsMainThread()) {
InitBrandName();
} else {
NS_WARNING_ASSERTION(
sBrandName,
"Did not initialize sbrandName, and not on the main thread?");
}
int rv = CUBEB_ERROR;
#ifdef MOZ_CUBEB_REMOTING
MOZ_LOG(gCubebLog, LogLevel::Info,
("%s: %s", PREF_CUBEB_SANDBOX, sCubebSandbox ? "true" : "false"));
if (sCubebSandbox) {
if (XRE_IsParentProcess() && !sIPCConnection) {
// TODO: Don't use audio IPC when within the same process.
auto fd = CreateAudioIPCConnectionUnlocked();
if (fd.IsValid()) {
sIPCConnection = new ipc::FileDescriptor(fd);
}
}
if (NS_WARN_IF(!sIPCConnection)) {
// Either the IPC connection failed to init or we're still waiting for
return nullptr;
}
MOZ_LOG(gCubebLog, LogLevel::Debug,
("%s: %d", PREF_AUDIOIPC_STACK_SIZE, (int)sAudioIPCStackSize));
audioipc2::AudioIpcInitParams initParams{};
initParams.mStackSize = sAudioIPCStackSize;
initParams.mServerConnection =
sIPCConnection->ClonePlatformHandle().release();
initParams.mThreadCreateCallback = [](const char* aName) {
PROFILER_REGISTER_THREAD(aName);
};
initParams.mThreadDestroyCallback = []() { PROFILER_UNREGISTER_THREAD(); };
cubeb* temp = nullptr;
rv = audioipc2::audioipc2_client_init(&temp, sBrandName, &initParams);
if (temp) {
sCubebHandle = new CubebHandle(temp);
}
} else {
#endif // MOZ_CUBEB_REMOTING
#ifdef XP_WIN
mozilla::mscom::EnsureMTA([&]() -> void {
#endif
cubeb* temp = nullptr;
rv = cubeb_init(&temp, sBrandName, sCubebBackendName);
if (temp) {
sCubebHandle = new CubebHandle(temp);
}
#ifdef XP_WIN
});
#endif
#ifdef MOZ_CUBEB_REMOTING
}
sIPCConnection = nullptr;
#endif // MOZ_CUBEB_REMOTING
NS_WARNING_ASSERTION(rv == CUBEB_OK, "Could not get a cubeb context.");
sCubebState =
(rv == CUBEB_OK) ? CubebState::Initialized : CubebState::Uninitialized;
return sCubebHandle;
}
void ReportCubebBackendUsed() {
RefPtr<CubebHandle> handle;
{
StaticMutexAutoLock lock(sMutex);
sAudioStreamInitEverSucceeded = true;
handle = sCubebHandle;
}
MOZ_RELEASE_ASSERT(handle.get());
LABELS_MEDIA_AUDIO_BACKEND label = LABELS_MEDIA_AUDIO_BACKEND::unknown;
auto backend =
kTelemetryBackendLabel.find(cubeb_get_backend_id(handle->Context()));
if (backend != kTelemetryBackendLabel.end()) {
label = backend->second;
}
AccumulateCategorical(label);
mozilla::glean::media_audio::backend
.Get(backend != kTelemetryBackendLabel.end()
? nsDependentCString(cubeb_get_backend_id(handle->Context()))
: nsCString("unknown"_ns))
.Add();
}
void ReportCubebStreamInitFailure(bool aIsFirst) {
StaticMutexAutoLock lock(sMutex);
if (!aIsFirst && !sAudioStreamInitEverSucceeded) {
// This machine has no audio hardware, or it's in really bad shape, don't
// send this info, since we want CUBEB_BACKEND_INIT_FAILURE_OTHER to detect
// failures to open multiple streams in a process over time.
return;
}
AccumulateCategorical(aIsFirst ? LABELS_MEDIA_AUDIO_INIT_FAILURE::first
: LABELS_MEDIA_AUDIO_INIT_FAILURE::other);
mozilla::glean::media_audio::init_failure
.EnumGet(aIsFirst ? mozilla::glean::media_audio::InitFailureLabel::eFirst
: mozilla::glean::media_audio::InitFailureLabel::eOther)
.Add();
}
uint32_t GetCubebPlaybackLatencyInMilliseconds() {
StaticMutexAutoLock lock(sMutex);
return sCubebPlaybackLatencyInMilliseconds;
}
bool CubebPlaybackLatencyPrefSet() {
StaticMutexAutoLock lock(sMutex);
return sCubebPlaybackLatencyPrefSet;
}
bool CubebMTGLatencyPrefSet() {
StaticMutexAutoLock lock(sMutex);
return sCubebMTGLatencyPrefSet;
}
uint32_t GetCubebMTGLatencyInFrames(cubeb_stream_params* params) {
StaticMutexAutoLock lock(sMutex);
if (sCubebMTGLatencyPrefSet) {
MOZ_ASSERT(sCubebMTGLatencyInFrames > 0);
return sCubebMTGLatencyInFrames;
}
#ifdef MOZ_WIDGET_ANDROID
int frames = AndroidGetAudioOutputFramesPerBuffer();
if (frames > 0) {
return frames;
} else {
return 512;
}
#else
RefPtr<CubebHandle> handle = GetCubebUnlocked();
if (!handle) {
return sCubebMTGLatencyInFrames; // default 512
}
uint32_t latency_frames = 0;
int cubeb_result = CUBEB_OK;
{
StaticMutexAutoUnlock unlock(sMutex);
cubeb_result =
cubeb_get_min_latency(handle->Context(), params, &latency_frames);
}
if (cubeb_result != CUBEB_OK) {
NS_WARNING("Could not get minimal latency from cubeb.");
return sCubebMTGLatencyInFrames; // default 512
}
return latency_frames;
#endif
}
static const char* gInitCallbackPrefs[] = {
PREF_VOLUME_SCALE,
PREF_CUBEB_OUTPUT_DEVICE,
PREF_CUBEB_LATENCY_PLAYBACK,
PREF_CUBEB_LATENCY_MTG,
PREF_CUBEB_BACKEND,
PREF_CUBEB_FORCE_SAMPLE_RATE,
PREF_CUBEB_FORCE_NULL_CONTEXT,
PREF_CUBEB_SANDBOX,
PREF_AUDIOIPC_STACK_SIZE,
PREF_AUDIOIPC_SHM_AREA_SIZE,
nullptr,
};
static const char* gCallbackPrefs[] = {
// We don't want to call the callback on startup, because the pref is the
// empty string by default ("", which means "logging disabled"). Because the
// logging can be enabled via environment variables (MOZ_LOG="module:5"),
// calling this callback on init would immediately re-disable the logging.
PREF_CUBEB_LOGGING_LEVEL,
nullptr,
};
void InitLibrary() {
Preferences::RegisterCallbacksAndCall(PrefChanged, gInitCallbackPrefs);
Preferences::RegisterCallbacks(PrefChanged, gCallbackPrefs);
if (MOZ_LOG_TEST(gCubebLog, LogLevel::Verbose)) {
cubeb_set_log_callback(CUBEB_LOG_VERBOSE, CubebLogCallback);
} else if (MOZ_LOG_TEST(gCubebLog, LogLevel::Error)) {
cubeb_set_log_callback(CUBEB_LOG_NORMAL, CubebLogCallback);
}
#ifndef MOZ_WIDGET_ANDROID
NS_DispatchToMainThread(
NS_NewRunnableFunction("CubebUtils::InitLibrary", &InitBrandName));
#endif
#ifdef MOZ_CUBEB_REMOTING
if (sCubebSandbox && XRE_IsContentProcess()) {
# if defined(XP_LINUX) && !defined(MOZ_WIDGET_ANDROID)
if (atp_set_real_time_limit(0, 48000)) {
NS_WARNING("could not set real-time limit in CubebUtils::InitLibrary");
}
InstallSoftRealTimeLimitHandler();
# endif
InitAudioIPCConnection();
}
#endif
// Ensure the CallbackThreadRegistry is not created in an audio callback by
// creating it now.
Unused << CallbackThreadRegistry::Get();
}
void ShutdownLibrary() {
Preferences::UnregisterCallbacks(PrefChanged, gInitCallbackPrefs);
Preferences::UnregisterCallbacks(PrefChanged, gCallbackPrefs);
cubeb_set_log_callback(CUBEB_LOG_DISABLED, nullptr);
RefPtr<CubebHandle> trash;
StaticMutexAutoLock lock(sMutex);
trash = sCubebHandle.forget();
sBrandName = nullptr;
sCubebBackendName = nullptr;
// This will ensure we don't try to re-create a context.
sCubebState = CubebState::Shutdown;
if (trash) {
StaticMutexAutoUnlock unlock(sMutex);
nsrefcnt count = trash.forget().take()->Release();
MOZ_RELEASE_ASSERT(!count,
"ShutdownLibrary should be releasing the last reference "
"to the cubeb ctx!");
}
#ifdef MOZ_CUBEB_REMOTING
sIPCConnection = nullptr;
ShutdownAudioIPCServer();
#endif
}
bool SandboxEnabled() {
#ifdef MOZ_CUBEB_REMOTING
StaticMutexAutoLock lock(sMutex);
return !!sCubebSandbox;
#else
return false;
#endif
}
already_AddRefed<SharedThreadPool> GetCubebOperationThread() {
RefPtr<SharedThreadPool> pool = SharedThreadPool::Get("CubebOperation"_ns, 1);
const uint32_t kIdleThreadTimeoutMs = 2000;
pool->SetIdleThreadTimeout(PR_MillisecondsToInterval(kIdleThreadTimeoutMs));
return pool.forget();
}
uint32_t MaxNumberOfChannels() {
RefPtr<CubebHandle> handle = GetCubeb();
uint32_t maxNumberOfChannels;
if (handle && cubeb_get_max_channel_count(handle->Context(),
&maxNumberOfChannels) == CUBEB_OK) {
return maxNumberOfChannels;
}
return 0;
}
void GetCurrentBackend(nsAString& aBackend) {
RefPtr<CubebHandle> handle = GetCubeb();
if (handle) {
const char* backend = cubeb_get_backend_id(handle->Context());
if (backend) {
aBackend.AssignASCII(backend);
return;
}
}
aBackend.AssignLiteral("unknown");
}
char* GetForcedOutputDevice() {
StaticMutexAutoLock lock(sMutex);
return sCubebOutputDeviceName;
}
cubeb_stream_prefs GetDefaultStreamPrefs(cubeb_device_type aType) {
cubeb_stream_prefs prefs = CUBEB_STREAM_PREF_NONE;
#ifdef XP_WIN
if (StaticPrefs::media_cubeb_wasapi_raw() & static_cast<uint32_t>(aType)) {
prefs |= CUBEB_STREAM_PREF_RAW;
}
#endif
return prefs;
}
bool RouteOutputAsVoice() { return sRouteOutputAsVoice; }
long datacb(cubeb_stream*, void*, const void*, void* out_buffer, long nframes) {
PodZero(static_cast<float*>(out_buffer), nframes * 2);
return nframes;
}
void statecb(cubeb_stream*, void*, cubeb_state) {}
bool EstimatedRoundTripLatencyDefaultDevices(double* aMean, double* aStdDev) {
RefPtr<CubebHandle> handle = GetCubeb();
if (!handle) {
MOZ_LOG(gCubebLog, LogLevel::Error, ("No cubeb context, bailing."));
return false;
}
nsTArray<double> roundtripLatencies;
// Create a cubeb stream with the correct latency and default input/output
// devices (mono/stereo channels). Wait for two seconds, get the latency a few
// times.
int rv;
uint32_t rate;
uint32_t latencyFrames;
rv = cubeb_get_preferred_sample_rate(handle->Context(), &rate);
if (rv != CUBEB_OK) {
MOZ_LOG(gCubebLog, LogLevel::Error, ("Could not get preferred rate"));
return false;
}
cubeb_stream_params output_params;
output_params.format = CUBEB_SAMPLE_FLOAT32NE;
output_params.rate = rate;
output_params.channels = 2;
output_params.layout = CUBEB_LAYOUT_UNDEFINED;
output_params.prefs = GetDefaultStreamPrefs(CUBEB_DEVICE_TYPE_OUTPUT);
latencyFrames = GetCubebMTGLatencyInFrames(&output_params);
cubeb_stream_params input_params;
input_params.format = CUBEB_SAMPLE_FLOAT32NE;
input_params.rate = rate;
input_params.channels = 1;
input_params.layout = CUBEB_LAYOUT_UNDEFINED;
input_params.prefs = GetDefaultStreamPrefs(CUBEB_DEVICE_TYPE_INPUT);
cubeb_stream* stm;
rv = cubeb_stream_init(handle->Context(), &stm,
"about:support latency estimation", NULL,
&input_params, NULL, &output_params, latencyFrames,
datacb, statecb, NULL);
if (rv != CUBEB_OK) {
MOZ_LOG(gCubebLog, LogLevel::Error, ("Could not get init stream"));
return false;
}
rv = cubeb_stream_start(stm);
if (rv != CUBEB_OK) {
MOZ_LOG(gCubebLog, LogLevel::Error, ("Could not start stream"));
return false;
}
// +-2s
for (uint32_t i = 0; i < 40; i++) {
std::this_thread::sleep_for(std::chrono::milliseconds(50));
uint32_t inputLatency, outputLatency, rvIn, rvOut;
rvOut = cubeb_stream_get_latency(stm, &outputLatency);
if (rvOut) {
MOZ_LOG(gCubebLog, LogLevel::Error, ("Could not get output latency"));
}
rvIn = cubeb_stream_get_input_latency(stm, &inputLatency);
if (rvIn) {
MOZ_LOG(gCubebLog, LogLevel::Error, ("Could not get input latency"));
}
if (rvIn != CUBEB_OK || rvOut != CUBEB_OK) {
continue;
}
double roundTrip = static_cast<double>(outputLatency + inputLatency) / rate;
roundtripLatencies.AppendElement(roundTrip);
}
rv = cubeb_stream_stop(stm);
if (rv != CUBEB_OK) {
MOZ_LOG(gCubebLog, LogLevel::Error, ("Could not stop the stream"));
}
*aMean = 0.0;
*aStdDev = 0.0;
double variance = 0.0;
for (uint32_t i = 0; i < roundtripLatencies.Length(); i++) {
*aMean += roundtripLatencies[i];
}
*aMean /= roundtripLatencies.Length();
for (uint32_t i = 0; i < roundtripLatencies.Length(); i++) {
variance += pow(roundtripLatencies[i] - *aMean, 2.);
}
variance /= roundtripLatencies.Length();
*aStdDev = sqrt(variance);
MOZ_LOG(gCubebLog, LogLevel::Debug,
("Default device roundtrip latency in seconds %lf (stddev: %lf)",
*aMean, *aStdDev));
cubeb_stream_destroy(stm);
return true;
}
#ifdef MOZ_WIDGET_ANDROID
int32_t AndroidGetAudioOutputSampleRate() {
# if defined(MOZ_ANDROID_CONTENT_SERVICE_ISOLATED_PROCESS)
return 44100; // TODO: Remote value; will be handled in following patch.
# else
int32_t sample_rate = java::GeckoAppShell::GetAudioOutputSampleRate();
return sample_rate;
# endif
}
int32_t AndroidGetAudioOutputFramesPerBuffer() {
# if defined(MOZ_ANDROID_CONTENT_SERVICE_ISOLATED_PROCESS)
return 512; // TODO: Remote value; will be handled in following patch.
# else
int32_t frames = java::GeckoAppShell::GetAudioOutputFramesPerBuffer();
return frames;
# endif
}
#endif
} // namespace CubebUtils
} // namespace mozilla