Start a debug API extension

4 files changed, 153 insertions, 1 deletions

diff --git a/alc/alc.cpp b/alc/alc.cpp
index af8ff55d..0ed0ae58 100644
--- a/alc/alc.cpp
+++ b/alc/alc.cpp
@@ -459,6 +459,8 @@ const struct {
     DECL(alBufferSubDataSOFT),
 
     DECL(alBufferDataStatic),
+
+    DECL(alDebugMessageCallbackSOFT),
 #ifdef ALSOFT_EAX
 }, eaxFunctions[] = {
     DECL(EAXGet),
@@ -915,6 +917,8 @@ constexpr struct {
     DECL(AL_FORMAT_UHJ4CHN_MULAW_SOFT),
     DECL(AL_FORMAT_UHJ4CHN_ALAW_SOFT),
 
+    DECL(AL_DEBUG_OUTPUT_SOFT),
+
     DECL(AL_STOP_SOURCES_ON_DISCONNECT_SOFT),
 
 #ifdef ALSOFT_EAX
diff --git a/alc/context.cpp b/alc/context.cpp
index 008c2bf4..e2a2e2d2 100644
--- a/alc/context.cpp
+++ b/alc/context.cpp
@@ -113,7 +113,7 @@ void ALCcontext::setThreadContext(ALCcontext *context) noexcept
 #endif
 
 ALCcontext::ALCcontext(al::intrusive_ptr<ALCdevice> device)
-  : ContextBase{device.get()}, mALDevice{std::move(device)}
+    : ContextBase{device.get()}, mALDevice{std::move(device)}
 {
 }
 
@@ -295,6 +295,82 @@ void ALCcontext::applyAllUpdates()
     mHoldUpdates.store(false, std::memory_order_release);
 }
 
+void ALCcontext::sendDebugMessage(DebugSource source, DebugType type, ALuint id,
+    DebugSeverity severity, ALsizei length, const char *message)
+{
+    std::lock_guard<std::mutex> _{mDebugCbLock};
+    if(!mDebugEnabled.load())
+        return;
+
+    if(mDebugCb)
+        mDebugCb(al::to_underlying(source), al::to_underlying(type), id,
+            al::to_underlying(severity), length, message, mDebugParam);
+    else
+    {
+        /* TODO: Store in a log. */
+    }
+}
+
+FORCE_ALIGN void AL_APIENTRY alDebugMessageCallbackSOFT(ALDEBUGPROCSOFT callback, void *userParam) noexcept
+{
+    ContextRef context{GetContextRef()};
+    if(!context) UNLIKELY return;
+
+    std::lock_guard<std::mutex> _{context->mDebugCbLock};
+    context->mDebugCb = callback;
+    context->mDebugParam = userParam;
+}
+
+FORCE_ALIGN void AL_APIENTRY alDebugMessageInsertSOFT(ALenum source, ALenum type, ALuint id,
+    ALenum severity, ALsizei length, const ALchar *message) noexcept
+{
+    ContextRef context{GetContextRef()};
+    if(!context) UNLIKELY return;
+
+    if(!message)
+        return context->setError(AL_INVALID_VALUE, "Null message pointer");
+
+    DebugSource dsource{};
+    switch(source)
+    {
+    case AL_DEBUG_SOURCE_THIRD_PARTY_SOFT: dsource = DebugSource::ThirdParty; break;
+    case AL_DEBUG_SOURCE_APPLICATION_SOFT: dsource = DebugSource::Application; break;
+    case AL_DEBUG_SOURCE_API_SOFT:
+    case AL_DEBUG_SOURCE_AUDIO_SYSTEM_SOFT:
+    case AL_DEBUG_SOURCE_OTHER_SOFT:
+        return context->setError(AL_INVALID_ENUM, "Debug source enum 0x%04x not allowed", source);
+    default:
+        return context->setError(AL_INVALID_ENUM, "Invalid debug source enum 0x%04x", source);
+    }
+
+    DebugType dtype{};
+    switch(type)
+    {
+    case AL_DEBUG_TYPE_ERROR_SOFT: dtype = DebugType::Error; break;
+    case AL_DEBUG_TYPE_DEPRECATED_BEHAVIOR_SOFT: dtype = DebugType::DeprecatedBehavior; break;
+    case AL_DEBUG_TYPE_UNDEFINED_BEHAVIOR_SOFT: dtype = DebugType::UndefinedBehavior; break;
+    case AL_DEBUG_TYPE_PORTABILITY_SOFT: dtype = DebugType::Portability; break;
+    case AL_DEBUG_TYPE_PERFORMANCE_SOFT: dtype = DebugType::Performance; break;
+    case AL_DEBUG_TYPE_MARKER_SOFT: dtype = DebugType::Marker; break;
+    case AL_DEBUG_TYPE_OTHER_SOFT: dtype = DebugType::Other; break;
+    default:
+        return context->setError(AL_INVALID_ENUM, "Invalid debug type 0x%04x", type);
+    }
+
+    DebugSeverity dseverity{};
+    switch(severity)
+    {
+    case AL_DEBUG_SEVERITY_HIGH_SOFT: dseverity = DebugSeverity::High; break;
+    case AL_DEBUG_SEVERITY_MEDIUM_SOFT: dseverity = DebugSeverity::Medium; break;
+    case AL_DEBUG_SEVERITY_LOW_SOFT: dseverity = DebugSeverity::Low; break;
+    case AL_DEBUG_SEVERITY_NOTIFICATION_SOFT: dseverity = DebugSeverity::Notification; break;
+    default:
+        return context->setError(AL_INVALID_ENUM, "Invalid debug severity 0x%04x", severity);
+    }
+
+    context->debugMessage(dsource, dtype, id, dseverity, length, message);
+}
+
 #ifdef ALSOFT_EAX
 namespace {
 
diff --git a/alc/context.h b/alc/context.h
index e8efdbf1..697ecfe9 100644
--- a/alc/context.h
+++ b/alc/context.h
@@ -34,6 +34,30 @@ struct ALsource;
 using uint = unsigned int;
 
 
+enum class DebugSource : ALenum {
+    API = AL_DEBUG_SOURCE_API_SOFT,
+    System = AL_DEBUG_SOURCE_AUDIO_SYSTEM_SOFT,
+    ThirdParty = AL_DEBUG_SOURCE_THIRD_PARTY_SOFT,
+    Application = AL_DEBUG_SOURCE_APPLICATION_SOFT,
+    Other = AL_DEBUG_SOURCE_OTHER_SOFT,
+};
+enum class DebugType : ALenum {
+    Error = AL_DEBUG_TYPE_ERROR_SOFT,
+    DeprecatedBehavior = AL_DEBUG_TYPE_DEPRECATED_BEHAVIOR_SOFT,
+    UndefinedBehavior = AL_DEBUG_TYPE_UNDEFINED_BEHAVIOR_SOFT,
+    Portability = AL_DEBUG_TYPE_PORTABILITY_SOFT,
+    Performance = AL_DEBUG_TYPE_PERFORMANCE_SOFT,
+    Marker = AL_DEBUG_TYPE_MARKER_SOFT,
+    Other = AL_DEBUG_TYPE_OTHER_SOFT,
+};
+enum class DebugSeverity : ALenum {
+    High = AL_DEBUG_SEVERITY_HIGH_SOFT,
+    Medium = AL_DEBUG_SEVERITY_MEDIUM_SOFT,
+    Low = AL_DEBUG_SEVERITY_LOW_SOFT,
+    Notification = AL_DEBUG_SEVERITY_NOTIFICATION_SOFT,
+};
+
+
 struct SourceSubList {
     uint64_t FreeMask{~0_u64};
     ALsource *Sources{nullptr}; /* 64 */
@@ -76,6 +100,8 @@ struct ALCcontext : public al::intrusive_ref<ALCcontext>, ContextBase {
 
     std::atomic<ALenum> mLastError{AL_NO_ERROR};
 
+    std::atomic<bool> mDebugEnabled{false};
+
     DistanceModel mDistanceModel{DistanceModel::Default};
     bool mSourceDistanceModel{false};
 
@@ -88,6 +114,10 @@ struct ALCcontext : public al::intrusive_ref<ALCcontext>, ContextBase {
     ALEVENTPROCSOFT mEventCb{};
     void *mEventParam{nullptr};
 
+    std::mutex mDebugCbLock;
+    ALDEBUGPROCSOFT mDebugCb{};
+    void *mDebugParam{nullptr};
+
     ALlistener mListener{};
 
     al::vector<SourceSubList> mSourceList;
@@ -149,6 +179,17 @@ struct ALCcontext : public al::intrusive_ref<ALCcontext>, ContextBase {
 #endif
     void setError(ALenum errorCode, const char *msg, ...);
 
+    void sendDebugMessage(DebugSource source, DebugType type, ALuint id, DebugSeverity severity,
+        ALsizei length, const char *message);
+
+    void debugMessage(DebugSource source, DebugType type, ALuint id, DebugSeverity severity,
+        ALsizei length, const char *message)
+    {
+        if(!mDebugEnabled.load(std::memory_order_relaxed)) LIKELY
+            return;
+        sendDebugMessage(source, type, id, severity, length, message);
+    }
+
     /* Process-wide current context */
     static std::atomic<bool> sGlobalContextLock;
     static std::atomic<ALCcontext*> sGlobalContext;
diff --git a/alc/inprogext.h b/alc/inprogext.h
index ccb9a4be..53dc9f0c 100644
--- a/alc/inprogext.h
+++ b/alc/inprogext.h
@@ -54,6 +54,37 @@ AL_API void AL_APIENTRY alAuxiliaryEffectSlotStopvSOFT(ALsizei n, const ALuint *
 #define AL_STOP_SOURCES_ON_DISCONNECT_SOFT       0x19AB
 #endif
 
+#ifndef AL_SOFT_debug
+#define AL_SOFT_debug
+#define AL_DEBUG_OUTPUT_SOFT                     0x19B2
+#define AL_DEBUG_CALLBACK_FUNCTION_SOFT          0x19B3
+#define AL_DEBUG_CALLBACK_USER_PARAM_SOFT        0x19B4
+#define AL_DEBUG_SOURCE_API_SOFT                 0x19B5
+#define AL_DEBUG_SOURCE_AUDIO_SYSTEM_SOFT        0x19B6
+#define AL_DEBUG_SOURCE_THIRD_PARTY_SOFT         0x19B7
+#define AL_DEBUG_SOURCE_APPLICATION_SOFT         0x19B8
+#define AL_DEBUG_SOURCE_OTHER_SOFT               0x19B9
+#define AL_DEBUG_TYPE_ERROR_SOFT                 0x19BA
+#define AL_DEBUG_TYPE_DEPRECATED_BEHAVIOR_SOFT   0x19BB
+#define AL_DEBUG_TYPE_UNDEFINED_BEHAVIOR_SOFT    0x19BC
+#define AL_DEBUG_TYPE_PORTABILITY_SOFT           0x19BD
+#define AL_DEBUG_TYPE_PERFORMANCE_SOFT           0x19BE
+#define AL_DEBUG_TYPE_MARKER_SOFT                0x19BF
+#define AL_DEBUG_TYPE_OTHER_SOFT                 0x19C0
+#define AL_DEBUG_SEVERITY_HIGH_SOFT              0x19C1
+#define AL_DEBUG_SEVERITY_MEDIUM_SOFT            0x19C2
+#define AL_DEBUG_SEVERITY_LOW_SOFT               0x19C3
+#define AL_DEBUG_SEVERITY_NOTIFICATION_SOFT      0x19C4
+
+typedef void (AL_APIENTRY*ALDEBUGPROCSOFT)(ALenum source, ALenum type, ALuint id, ALenum severity, ALsizei length, const ALchar *message, void *userParam);
+typedef void (AL_APIENTRY*LPALDEBUGMESSAGECALLBACKSOFT)(ALDEBUGPROCSOFT callback, void *userParam);
+typedef void (AL_APIENTRY*LPALDEBUGMESSAGEINSERTSOFT)(ALenum source, ALenum type, ALuint id, ALenum severity, ALsizei length, const ALchar *message);
+#ifdef AL_ALEXT_PROTOTYPES
+void AL_APIENTRY alDebugMessageCallbackSOFT(ALDEBUGPROCSOFT callback, void *userParam) noexcept;
+void AL_APIENTRY alDebugMessageInsertSOFT(ALenum source, ALenum type, ALuint id, ALenum severity, ALsizei length, const ALchar *message) noexcept;
+#endif
+#endif
+
 
 /* Non-standard export. Not part of any extension. */
 AL_API const ALchar* AL_APIENTRY alsoft_get_version(void);