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-rw-r--r--src/core/CMakeLists.txt4
-rw-r--r--src/core/hle/service/nvflinger/buffer_queue_producer.cpp936
-rw-r--r--src/core/hle/service/nvflinger/buffer_queue_producer.h83
3 files changed, 1021 insertions, 2 deletions
diff --git a/src/core/CMakeLists.txt b/src/core/CMakeLists.txt
index 5ba9b6c09..669de3091 100644
--- a/src/core/CMakeLists.txt
+++ b/src/core/CMakeLists.txt
@@ -535,8 +535,6 @@ add_library(core STATIC
hle/service/nvdrv/nvmemp.h
hle/service/nvdrv/syncpoint_manager.cpp
hle/service/nvdrv/syncpoint_manager.h
- hle/service/nvflinger/buffer_queue.cpp
- hle/service/nvflinger/buffer_queue.h
hle/service/nvflinger/binder.h
hle/service/nvflinger/buffer_item.h
hle/service/nvflinger/buffer_item_consumer.cpp
@@ -546,6 +544,8 @@ add_library(core STATIC
hle/service/nvflinger/buffer_queue_core.cpp
hle/service/nvflinger/buffer_queue_core.h
hle/service/nvflinger/buffer_queue_defs.h
+ hle/service/nvflinger/buffer_queue_producer.cpp
+ hle/service/nvflinger/buffer_queue_producer.h
hle/service/nvflinger/buffer_slot.h
hle/service/nvflinger/buffer_transform_flags.h
hle/service/nvflinger/consumer_base.cpp
diff --git a/src/core/hle/service/nvflinger/buffer_queue_producer.cpp b/src/core/hle/service/nvflinger/buffer_queue_producer.cpp
new file mode 100644
index 000000000..d48e96b14
--- /dev/null
+++ b/src/core/hle/service/nvflinger/buffer_queue_producer.cpp
@@ -0,0 +1,936 @@
+// SPDX-License-Identifier: GPL-3.0-or-later
+// Copyright 2021 yuzu Emulator Project
+// Copyright 2014 The Android Open Source Project
+// Parts of this implementation were base on:
+// https://cs.android.com/android/platform/superproject/+/android-5.1.1_r38:frameworks/native/libs/gui/BufferQueueProducer.cpp
+
+#include "common/assert.h"
+#include "common/logging/log.h"
+#include "common/settings.h"
+#include "core/core.h"
+#include "core/hle/kernel/hle_ipc.h"
+#include "core/hle/kernel/k_event.h"
+#include "core/hle/kernel/k_readable_event.h"
+#include "core/hle/kernel/k_writable_event.h"
+#include "core/hle/kernel/kernel.h"
+#include "core/hle/service/kernel_helpers.h"
+#include "core/hle/service/nvdrv/nvdrv.h"
+#include "core/hle/service/nvflinger/buffer_queue_core.h"
+#include "core/hle/service/nvflinger/buffer_queue_producer.h"
+#include "core/hle/service/nvflinger/consumer_listener.h"
+#include "core/hle/service/nvflinger/parcel.h"
+#include "core/hle/service/nvflinger/ui/graphic_buffer.h"
+#include "core/hle/service/nvflinger/window.h"
+#include "core/hle/service/vi/vi.h"
+
+namespace android {
+
+BufferQueueProducer::BufferQueueProducer(Service::KernelHelpers::ServiceContext& service_context_,
+ std::shared_ptr<BufferQueueCore> buffer_queue_core_)
+ : service_context{service_context_}, core{std::move(buffer_queue_core_)}, slots(core->slots) {
+ buffer_wait_event = service_context.CreateEvent("BufferQueue:WaitEvent");
+}
+
+BufferQueueProducer::~BufferQueueProducer() {
+ service_context.CloseEvent(buffer_wait_event);
+}
+
+Status BufferQueueProducer::RequestBuffer(s32 slot, std::shared_ptr<GraphicBuffer>* buf) {
+ LOG_DEBUG(Service_NVFlinger, "slot {}", slot);
+
+ BufferQueueCore::AutoLock lock(core);
+
+ if (core->is_abandoned) {
+ LOG_ERROR(Service_NVFlinger, "BufferQueue has been abandoned");
+ return Status::NoInit;
+ }
+ if (slot < 0 || slot >= BufferQueueDefs::NUM_BUFFER_SLOTS) {
+ LOG_ERROR(Service_NVFlinger, "slot index {} out of range [0, {})", slot,
+ BufferQueueDefs::NUM_BUFFER_SLOTS);
+ return Status::BadValue;
+ } else if (slots[slot].buffer_state != BufferState::Dequeued) {
+ LOG_ERROR(Service_NVFlinger, "slot {} is not owned by the producer (state = {})", slot,
+ slots[slot].buffer_state);
+ return Status::BadValue;
+ }
+
+ slots[slot].request_buffer_called = true;
+ *buf = slots[slot].graphic_buffer;
+
+ return Status::NoError;
+}
+
+Status BufferQueueProducer::SetBufferCount(s32 buffer_count) {
+ LOG_DEBUG(Service_NVFlinger, "count = {}", buffer_count);
+ std::shared_ptr<IConsumerListener> listener;
+
+ {
+ BufferQueueCore::AutoLock lock(core);
+ core->WaitWhileAllocatingLocked();
+ if (core->is_abandoned) {
+ LOG_ERROR(Service_NVFlinger, "BufferQueue has been abandoned");
+ return Status::NoInit;
+ }
+
+ if (buffer_count > BufferQueueDefs::NUM_BUFFER_SLOTS) {
+ LOG_ERROR(Service_NVFlinger, "buffer_count {} too large (max {})", buffer_count,
+ BufferQueueDefs::NUM_BUFFER_SLOTS);
+ return Status::BadValue;
+ }
+
+ // There must be no dequeued buffers when changing the buffer count.
+ for (s32 s{}; s < BufferQueueDefs::NUM_BUFFER_SLOTS; ++s) {
+ if (slots[s].buffer_state == BufferState::Dequeued) {
+ LOG_ERROR(Service_NVFlinger, "buffer owned by producer");
+ return Status::BadValue;
+ }
+ }
+
+ if (buffer_count == 0) {
+ core->override_max_buffer_count = 0;
+ core->SignalDequeueCondition();
+ return Status::NoError;
+ }
+
+ const s32 min_buffer_slots = core->GetMinMaxBufferCountLocked(false);
+ if (buffer_count < min_buffer_slots) {
+ LOG_ERROR(Service_NVFlinger, "requested buffer count {} is less than minimum {}",
+ buffer_count, min_buffer_slots);
+ return Status::BadValue;
+ }
+
+ // Here we are guaranteed that the producer doesn't have any dequeued buffers and will
+ // release all of its buffer references.
+ if (core->GetPreallocatedBufferCountLocked() <= 0) {
+ core->FreeAllBuffersLocked();
+ }
+
+ core->override_max_buffer_count = buffer_count;
+ core->SignalDequeueCondition();
+ buffer_wait_event->GetWritableEvent().Signal();
+ listener = core->consumer_listener;
+ }
+
+ // Call back without lock held
+ if (listener != nullptr) {
+ listener->OnBuffersReleased();
+ }
+
+ return Status::NoError;
+}
+
+Status BufferQueueProducer::WaitForFreeSlotThenRelock(bool async, s32* found,
+ Status* returnFlags) const {
+ bool try_again = true;
+
+ while (try_again) {
+ if (core->is_abandoned) {
+ LOG_ERROR(Service_NVFlinger, "BufferQueue has been abandoned");
+ return Status::NoInit;
+ }
+
+ const s32 max_buffer_count = core->GetMaxBufferCountLocked(async);
+ if (async && core->override_max_buffer_count) {
+ if (core->override_max_buffer_count < max_buffer_count) {
+ LOG_ERROR(Service_NVFlinger, "async mode is invalid with buffer count override");
+ return Status::BadValue;
+ }
+ }
+
+ // Free up any buffers that are in slots beyond the max buffer count
+ for (s32 s = max_buffer_count; s < BufferQueueDefs::NUM_BUFFER_SLOTS; ++s) {
+ ASSERT(slots[s].buffer_state == BufferState::Free);
+ if (slots[s].graphic_buffer != nullptr) {
+ core->FreeBufferLocked(s);
+ *returnFlags |= Status::ReleaseAllBuffers;
+ }
+ }
+
+ s32 dequeued_count{};
+ s32 acquired_count{};
+ for (s32 s{}; s < max_buffer_count; ++s) {
+ switch (slots[s].buffer_state) {
+ case BufferState::Dequeued:
+ ++dequeued_count;
+ break;
+ case BufferState::Acquired:
+ ++acquired_count;
+ break;
+ default:
+ break;
+ }
+ }
+
+ // Producers are not allowed to dequeue more than one buffer if they did not set a buffer
+ // count
+ if (!core->override_max_buffer_count && dequeued_count) {
+ LOG_ERROR(Service_NVFlinger,
+ "can't dequeue multiple buffers without setting the buffer count");
+ return Status::InvalidOperation;
+ }
+
+ // See whether a buffer has been queued since the last SetBufferCount so we know whether to
+ // perform the min undequeued buffers check below
+ if (core->buffer_has_been_queued) {
+ // Make sure the producer is not trying to dequeue more buffers than allowed
+ const s32 new_undequeued_count = max_buffer_count - (dequeued_count + 1);
+ const s32 min_undequeued_count = core->GetMinUndequeuedBufferCountLocked(async);
+ if (new_undequeued_count < min_undequeued_count) {
+ LOG_ERROR(Service_NVFlinger,
+ "min undequeued buffer count({}) exceeded (dequeued={} undequeued={})",
+ min_undequeued_count, dequeued_count, new_undequeued_count);
+ return Status::InvalidOperation;
+ }
+ }
+
+ *found = BufferQueueCore::INVALID_BUFFER_SLOT;
+
+ // If we disconnect and reconnect quickly, we can be in a state where our slots are empty
+ // but we have many buffers in the queue. This can cause us to run out of memory if we
+ // outrun the consumer. Wait here if it looks like we have too many buffers queued up.
+ const bool too_many_buffers = core->queue.size() > static_cast<size_t>(max_buffer_count);
+ if (too_many_buffers) {
+ LOG_ERROR(Service_NVFlinger, "queue size is {}, waiting", core->queue.size());
+ } else {
+ if (!core->free_buffers.empty()) {
+ auto slot = core->free_buffers.begin();
+ *found = *slot;
+ core->free_buffers.erase(slot);
+ } else if (core->allow_allocation && !core->free_slots.empty()) {
+ auto slot = core->free_slots.begin();
+ // Only return free slots up to the max buffer count
+ if (*slot < max_buffer_count) {
+ *found = *slot;
+ core->free_slots.erase(slot);
+ }
+ }
+ }
+
+ // If no buffer is found, or if the queue has too many buffers outstanding, wait for a
+ // buffer to be acquired or released, or for the max buffer count to change.
+ try_again = (*found == BufferQueueCore::INVALID_BUFFER_SLOT) || too_many_buffers;
+ if (try_again) {
+ // Return an error if we're in non-blocking mode (producer and consumer are controlled
+ // by the application).
+ if (core->dequeue_buffer_cannot_block &&
+ (acquired_count <= core->max_acquired_buffer_count)) {
+ return Status::WouldBlock;
+ }
+
+ if (!core->WaitForDequeueCondition()) {
+ // We are no longer running
+ return Status::NoError;
+ }
+ }
+ }
+
+ return Status::NoError;
+}
+
+Status BufferQueueProducer::DequeueBuffer(s32* out_slot, Fence* out_fence, bool async, u32 width,
+ u32 height, PixelFormat format, u32 usage) {
+ { BufferQueueCore::AutoLock lock(core); }
+
+ LOG_DEBUG(Service_NVFlinger, "async={} w={} h={} format={}, usage={}", async ? "true" : "false",
+ width, height, format, usage);
+
+ if ((width && !height) || (!width && height)) {
+ LOG_ERROR(Service_NVFlinger, "invalid size: w={} h={}", width, height);
+ return Status::BadValue;
+ }
+
+ Status return_flags = Status::NoError;
+ bool attached_by_consumer = false;
+ {
+ BufferQueueCore::AutoLock lock(core);
+ core->WaitWhileAllocatingLocked();
+ if (format == PixelFormat::NoFormat) {
+ format = core->default_buffer_format;
+ }
+
+ // Enable the usage bits the consumer requested
+ usage |= core->consumer_usage_bit;
+ const bool use_default_size = !width && !height;
+ if (use_default_size) {
+ width = core->default_width;
+ height = core->default_height;
+ }
+
+ s32 found = BufferItem::INVALID_BUFFER_SLOT;
+ while (found == BufferItem::INVALID_BUFFER_SLOT) {
+ Status status = WaitForFreeSlotThenRelock(async, &found, &return_flags);
+ if (status != Status::NoError) {
+ return status;
+ }
+
+ // This should not happen
+ if (found == BufferQueueCore::INVALID_BUFFER_SLOT) {
+ LOG_DEBUG(Service_NVFlinger, "no available buffer slots");
+ return Status::Busy;
+ }
+
+ const std::shared_ptr<GraphicBuffer>& buffer(slots[found].graphic_buffer);
+
+ // If we are not allowed to allocate new buffers, WaitForFreeSlotThenRelock must have
+ // returned a slot containing a buffer. If this buffer would require reallocation to
+ // meet the requested attributes, we free it and attempt to get another one.
+ if (!core->allow_allocation) {
+ if (buffer->NeedsReallocation(width, height, format, usage)) {
+ core->FreeBufferLocked(found);
+ found = BufferItem::INVALID_BUFFER_SLOT;
+ continue;
+ }
+ }
+ }
+
+ *out_slot = found;
+ attached_by_consumer = slots[found].attached_by_consumer;
+ slots[found].buffer_state = BufferState::Dequeued;
+
+ const std::shared_ptr<GraphicBuffer>& buffer(slots[found].graphic_buffer);
+
+ if ((buffer == nullptr) || buffer->NeedsReallocation(width, height, format, usage)) {
+ slots[found].acquire_called = false;
+ slots[found].graphic_buffer = nullptr;
+ slots[found].request_buffer_called = false;
+ slots[found].fence = Fence::NoFence();
+ core->buffer_age = 0;
+ return_flags |= Status::BufferNeedsReallocation;
+ } else {
+ // We add 1 because that will be the frame number when this buffer
+ // is queued
+ core->buffer_age = core->frame_counter + 1 - slots[found].frame_number;
+ }
+
+ LOG_DEBUG(Service_NVFlinger, "setting buffer age to {}", core->buffer_age);
+
+ *out_fence = slots[found].fence;
+
+ slots[found].fence = Fence::NoFence();
+ }
+
+ if ((return_flags & Status::BufferNeedsReallocation) != Status::None) {
+ LOG_DEBUG(Service_NVFlinger, "allocating a new buffer for slot {}", *out_slot);
+
+ auto graphic_buffer = std::make_shared<GraphicBuffer>(width, height, format, usage);
+ if (graphic_buffer == nullptr) {
+ LOG_ERROR(Service_NVFlinger, "creating GraphicBuffer failed");
+ return Status::NoMemory;
+ }
+
+ {
+ BufferQueueCore::AutoLock lock(core);
+ if (core->is_abandoned) {
+ LOG_ERROR(Service_NVFlinger, "BufferQueue has been abandoned");
+ return Status::NoInit;
+ }
+
+ slots[*out_slot].graphic_buffer = graphic_buffer;
+ }
+ }
+
+ if (attached_by_consumer) {
+ return_flags |= Status::BufferNeedsReallocation;
+ }
+
+ LOG_DEBUG(Service_NVFlinger, "returning slot={} frame={}, flags={}", *out_slot,
+ slots[*out_slot].frame_number, return_flags);
+ return return_flags;
+}
+
+Status BufferQueueProducer::DetachBuffer(s32 slot) {
+ LOG_DEBUG(Service_NVFlinger, "slot {}", slot);
+
+ BufferQueueCore::AutoLock lock(core);
+ if (core->is_abandoned) {
+ LOG_ERROR(Service_NVFlinger, "BufferQueue has been abandoned");
+ return Status::NoInit;
+ }
+
+ if (slot < 0 || slot >= BufferQueueDefs::NUM_BUFFER_SLOTS) {
+ LOG_ERROR(Service_NVFlinger, "slot {} out of range [0, {})", slot,
+ BufferQueueDefs::NUM_BUFFER_SLOTS);
+ return Status::BadValue;
+ } else if (slots[slot].buffer_state != BufferState::Dequeued) {
+ LOG_ERROR(Service_NVFlinger, "slot {} is not owned by the producer (state = {})", slot,
+ slots[slot].buffer_state);
+ return Status::BadValue;
+ } else if (!slots[slot].request_buffer_called) {
+ LOG_ERROR(Service_NVFlinger, "buffer in slot {} has not been requested", slot);
+ return Status::BadValue;
+ }
+
+ core->FreeBufferLocked(slot);
+ core->SignalDequeueCondition();
+
+ return Status::NoError;
+}
+
+Status BufferQueueProducer::DetachNextBuffer(std::shared_ptr<GraphicBuffer>* out_buffer,
+ Fence* out_fence) {
+ if (out_buffer == nullptr) {
+ LOG_ERROR(Service_NVFlinger, "out_buffer must not be nullptr");
+ return Status::BadValue;
+ } else if (out_fence == nullptr) {
+ LOG_ERROR(Service_NVFlinger, "out_fence must not be nullptr");
+ return Status::BadValue;
+ }
+
+ BufferQueueCore::AutoLock lock(core);
+
+ core->WaitWhileAllocatingLocked();
+
+ if (core->is_abandoned) {
+ LOG_ERROR(Service_NVFlinger, "BufferQueue has been abandoned");
+ return Status::NoInit;
+ }
+ if (core->free_buffers.empty()) {
+ return Status::NoMemory;
+ }
+
+ const s32 found = core->free_buffers.front();
+ core->free_buffers.remove(found);
+
+ LOG_DEBUG(Service_NVFlinger, "Detached slot {}", found);
+
+ *out_buffer = slots[found].graphic_buffer;
+ *out_fence = slots[found].fence;
+
+ core->FreeBufferLocked(found);
+
+ return Status::NoError;
+}
+
+Status BufferQueueProducer::AttachBuffer(s32* out_slot,
+ const std::shared_ptr<GraphicBuffer>& buffer) {
+ if (out_slot == nullptr) {
+ LOG_ERROR(Service_NVFlinger, "out_slot must not be nullptr");
+ return Status::BadValue;
+ } else if (buffer == nullptr) {
+ LOG_ERROR(Service_NVFlinger, "Cannot attach nullptr buffer");
+ return Status::BadValue;
+ }
+
+ BufferQueueCore::AutoLock lock(core);
+ core->WaitWhileAllocatingLocked();
+
+ Status return_flags = Status::NoError;
+ s32 found{};
+
+ const auto status = WaitForFreeSlotThenRelock(false, &found, &return_flags);
+ if (status != Status::NoError) {
+ return status;
+ }
+
+ if (found == BufferQueueCore::INVALID_BUFFER_SLOT) {
+ LOG_ERROR(Service_NVFlinger, "No available buffer slots");
+ return Status::Busy;
+ }
+
+ *out_slot = found;
+
+ LOG_DEBUG(Service_NVFlinger, "Returning slot {} flags={}", *out_slot, return_flags);
+
+ slots[*out_slot].graphic_buffer = buffer;
+ slots[*out_slot].buffer_state = BufferState::Dequeued;
+ slots[*out_slot].fence = Fence::NoFence();
+ slots[*out_slot].request_buffer_called = true;
+
+ return return_flags;
+}
+
+Status BufferQueueProducer::QueueBuffer(s32 slot, const QueueBufferInput& input,
+ QueueBufferOutput* output) {
+ s64 timestamp{};
+ bool is_auto_timestamp{};
+ Rect crop;
+ NativeWindowScalingMode scaling_mode{};
+ NativeWindowTransform transform;
+ u32 sticky_transform_{};
+ bool async{};
+ s32 swap_interval{};
+ Fence fence{};
+
+ input.Deflate(&timestamp, &is_auto_timestamp, &crop, &scaling_mode, &transform,
+ &sticky_transform_, &async, &swap_interval, &fence);
+
+ switch (scaling_mode) {
+ case NativeWindowScalingMode::Freeze:
+ case NativeWindowScalingMode::ScaleToWindow:
+ case NativeWindowScalingMode::ScaleCrop:
+ case NativeWindowScalingMode::NoScaleCrop:
+ break;
+ default:
+ LOG_ERROR(Service_NVFlinger, "unknown scaling mode {}", scaling_mode);
+ return Status::BadValue;
+ }
+
+ std::shared_ptr<IConsumerListener> frameAvailableListener;
+ std::shared_ptr<IConsumerListener> frameReplacedListener;
+ s32 callback_ticket{};
+ BufferItem item;
+
+ {
+ BufferQueueCore::AutoLock lock(core);
+
+ if (core->is_abandoned) {
+ LOG_ERROR(Service_NVFlinger, "BufferQueue has been abandoned");
+ return Status::NoInit;
+ }
+
+ const s32 max_buffer_count = core->GetMaxBufferCountLocked(async);
+ if (async && core->override_max_buffer_count) {
+ if (core->override_max_buffer_count < max_buffer_count) {
+ LOG_ERROR(Service_NVFlinger, "async mode is invalid with "
+ "buffer count override");
+ return Status::BadValue;
+ }
+ }
+
+ if (slot < 0 || slot >= max_buffer_count) {
+ LOG_ERROR(Service_NVFlinger, "slot index {} out of range [0, {})", slot,
+ max_buffer_count);
+ return Status::BadValue;
+ } else if (slots[slot].buffer_state != BufferState::Dequeued) {
+ LOG_ERROR(Service_NVFlinger,
+ "slot {} is not owned by the producer "
+ "(state = {})",
+ slot, slots[slot].buffer_state);
+ return Status::BadValue;
+ } else if (!slots[slot].request_buffer_called) {
+ LOG_ERROR(Service_NVFlinger,
+ "slot {} was queued without requesting "
+ "a buffer",
+ slot);
+ return Status::BadValue;
+ }
+
+ LOG_DEBUG(Service_NVFlinger,
+ "slot={} frame={} time={} crop=[{},{},{},{}] transform={} scale={}", slot,
+ core->frame_counter + 1, timestamp, crop.Left(), crop.Top(), crop.Right(),
+ crop.Bottom(), transform, scaling_mode);
+
+ const std::shared_ptr<GraphicBuffer>& graphic_buffer(slots[slot].graphic_buffer);
+ Rect buffer_rect(graphic_buffer->Width(), graphic_buffer->Height());
+ Rect cropped_rect;
+ crop.Intersect(buffer_rect, &cropped_rect);
+
+ if (cropped_rect != crop) {
+ LOG_ERROR(Service_NVFlinger, "crop rect is not contained within the buffer in slot {}",
+ slot);
+ return Status::BadValue;
+ }
+
+ slots[slot].fence = fence;
+ slots[slot].buffer_state = BufferState::Queued;
+ ++core->frame_counter;
+ slots[slot].frame_number = core->frame_counter;
+
+ item.acquire_called = slots[slot].acquire_called;
+ item.graphic_buffer = slots[slot].graphic_buffer;
+ item.crop = crop;
+ item.transform = transform & ~NativeWindowTransform::InverseDisplay;
+ item.transform_to_display_inverse =
+ (transform & NativeWindowTransform::InverseDisplay) != NativeWindowTransform::None;
+ item.scaling_mode = static_cast<u32>(scaling_mode);
+ item.timestamp = timestamp;
+ item.is_auto_timestamp = is_auto_timestamp;
+ item.frame_number = core->frame_counter;
+ item.slot = slot;
+ item.fence = fence;
+ item.is_droppable = core->dequeue_buffer_cannot_block || async;
+ item.swap_interval = swap_interval;
+ sticky_transform = sticky_transform_;
+
+ if (core->queue.empty()) {
+ // When the queue is empty, we can simply queue this buffer
+ core->queue.push_back(item);
+ frameAvailableListener = core->consumer_listener;
+ } else {
+ // When the queue is not empty, we need to look at the front buffer
+ // state to see if we need to replace it
+ auto front(core->queue.begin());
+
+ if (front->is_droppable) {
+ // If the front queued buffer is still being tracked, we first
+ // mark it as freed
+ if (core->StillTracking(&*front)) {
+ slots[front->slot].buffer_state = BufferState::Free;
+ core->free_buffers.push_front(front->slot);
+ }
+ // Overwrite the droppable buffer with the incoming one
+ *front = item;
+ frameReplacedListener = core->consumer_listener;
+ } else {
+ core->queue.push_back(item);
+ frameAvailableListener = core->consumer_listener;
+ }
+ }
+
+ core->buffer_has_been_queued = true;
+ core->SignalDequeueCondition();
+ output->Inflate(core->default_width, core->default_height, core->transform_hint,
+ static_cast<u32>(core->queue.size()));
+
+ // Take a ticket for the callback functions
+ callback_ticket = next_callback_ticket++;
+ }
+
+ // Don't send the GraphicBuffer through the callback, and don't send the slot number, since the
+ // consumer shouldn't need it
+ item.graphic_buffer.reset();
+ item.slot = BufferItem::INVALID_BUFFER_SLOT;
+
+ // Call back without the main BufferQueue lock held, but with the callback lock held so we can
+ // ensure that callbacks occur in order
+ {
+ std::unique_lock lock(callback_mutex);
+ while (callback_ticket != current_callback_ticket) {
+ std::unique_lock<std::mutex> lk(callback_mutex);
+ callback_condition.wait(lk);
+ }
+
+ if (frameAvailableListener != nullptr) {
+ frameAvailableListener->OnFrameAvailable(item);
+ } else if (frameReplacedListener != nullptr) {
+ frameReplacedListener->OnFrameReplaced(item);
+ }
+
+ ++current_callback_ticket;
+ callback_condition.notify_all();
+ }
+
+ return Status::NoError;
+}
+
+void BufferQueueProducer::CancelBuffer(s32 slot, const Fence& fence) {
+ LOG_DEBUG(Service_NVFlinger, "slot {}", slot);
+
+ BufferQueueCore::AutoLock lock(core);
+
+ if (core->is_abandoned) {
+ LOG_ERROR(Service_NVFlinger, "BufferQueue has been abandoned");
+ return;
+ }
+
+ if (slot < 0 || slot >= BufferQueueDefs::NUM_BUFFER_SLOTS) {
+ LOG_ERROR(Service_NVFlinger, "slot index {} out of range [0, {})", slot,
+ BufferQueueDefs::NUM_BUFFER_SLOTS);
+ return;
+ } else if (slots[slot].buffer_state != BufferState::Dequeued) {
+ LOG_ERROR(Service_NVFlinger, "slot {} is not owned by the producer (state = {})", slot,
+ slots[slot].buffer_state);
+ return;
+ }
+
+ core->free_buffers.push_front(slot);
+ slots[slot].buffer_state = BufferState::Free;
+ slots[slot].fence = fence;
+
+ core->SignalDequeueCondition();
+ buffer_wait_event->GetWritableEvent().Signal();
+}
+
+Status BufferQueueProducer::Query(NativeWindow what, s32* out_value) {
+ BufferQueueCore::AutoLock lock(core);
+
+ if (out_value == nullptr) {
+ LOG_ERROR(Service_NVFlinger, "outValue was nullptr");
+ return Status::BadValue;
+ }
+
+ if (core->is_abandoned) {
+ LOG_ERROR(Service_NVFlinger, "BufferQueue has been abandoned");
+ return Status::NoInit;
+ }
+
+ s32 value{};
+ switch (what) {
+ case NativeWindow::Width:
+ value = static_cast<s32>(core->default_width);
+ break;
+ case NativeWindow::Height:
+ value = static_cast<s32>(core->default_height);
+ break;
+ case NativeWindow::Format:
+ value = static_cast<s32>(core->default_buffer_format);
+ break;
+ case NativeWindow::MinUndequeedBuffers:
+ value = core->GetMinUndequeuedBufferCountLocked(false);
+ break;
+ case NativeWindow::StickyTransform:
+ value = static_cast<s32>(sticky_transform);
+ break;
+ case NativeWindow::ConsumerRunningBehind:
+ value = (core->queue.size() > 1);
+ break;
+ case NativeWindow::ConsumerUsageBits:
+ value = static_cast<s32>(core->consumer_usage_bit);
+ break;
+ case NativeWindow::BufferAge:
+ if (core->buffer_age > INT32_MAX) {
+ value = 0;
+ } else {
+ value = static_cast<s32>(core->buffer_age);
+ }
+ break;
+ default:
+ UNREACHABLE();
+ return Status::BadValue;
+ }
+
+ LOG_DEBUG(Service_NVFlinger, "what = {}, value = {}", what, value);
+
+ *out_value = value;
+
+ return Status::NoError;
+}
+
+Status BufferQueueProducer::Connect(const std::shared_ptr<IProducerListener>& listener,
+ NativeWindowApi api, bool producer_controlled_by_app,
+ QueueBufferOutput* output) {
+ BufferQueueCore::AutoLock lock(core);
+
+ LOG_DEBUG(Service_NVFlinger, "api = {} producer_controlled_by_app = {}", api,
+ producer_controlled_by_app);
+
+ if (core->is_abandoned) {
+ LOG_ERROR(Service_NVFlinger, "BufferQueue has been abandoned");
+ return Status::NoInit;
+ }
+
+ if (core->consumer_listener == nullptr) {
+ LOG_ERROR(Service_NVFlinger, "BufferQueue has no consumer");
+ return Status::NoInit;
+ }
+
+ if (output == nullptr) {
+ LOG_ERROR(Service_NVFlinger, "output was nullptr");
+ return Status::BadValue;
+ }
+
+ if (core->connected_api != NativeWindowApi::NoConnectedApi) {
+ LOG_ERROR(Service_NVFlinger, "already connected (cur = {} req = {})", core->connected_api,
+ api);
+ return Status::BadValue;
+ }
+
+ Status status = Status::NoError;
+ switch (api) {
+ case NativeWindowApi::Egl:
+ case NativeWindowApi::Cpu:
+ case NativeWindowApi::Media:
+ case NativeWindowApi::Camera:
+ core->connected_api = api;
+ output->Inflate(core->default_width, core->default_height, core->transform_hint,
+ static_cast<u32>(core->queue.size()));
+ core->connected_producer_listener = listener;
+ break;
+ default:
+ LOG_ERROR(Service_NVFlinger, "unknown api = {}", api);
+ status = Status::BadValue;
+ break;
+ }
+
+ core->buffer_has_been_queued = false;
+ core->dequeue_buffer_cannot_block =
+ core->consumer_controlled_by_app && producer_controlled_by_app;
+ core->allow_allocation = true;
+
+ return status;
+}
+
+Status BufferQueueProducer::Disconnect(NativeWindowApi api) {
+ LOG_DEBUG(Service_NVFlinger, "api = {}", api);
+
+ Status status = Status::NoError;
+ std::shared_ptr<IConsumerListener> listener;
+
+ {
+ BufferQueueCore::AutoLock lock(core);
+
+ core->WaitWhileAllocatingLocked();
+
+ if (core->is_abandoned) {
+ // Disconnecting after the surface has been abandoned is a no-op.
+ return Status::NoError;
+ }
+
+ switch (api) {
+ case NativeWindowApi::Egl:
+ case NativeWindowApi::Cpu:
+ case NativeWindowApi::Media:
+ case NativeWindowApi::Camera:
+ if (core->connected_api == api) {
+ core->FreeAllBuffersLocked();
+ core->connected_producer_listener = nullptr;
+ core->connected_api = NativeWindowApi::NoConnectedApi;
+ core->SignalDequeueCondition();
+ buffer_wait_event->GetWritableEvent().Signal();
+ listener = core->consumer_listener;
+ } else if (core->connected_api != NativeWindowApi::NoConnectedApi) {
+ LOG_ERROR(Service_NVFlinger, "still connected to another api (cur = {} req = {})",
+ core->connected_api, api);
+ status = Status::BadValue;
+ }
+ break;
+ default:
+ LOG_ERROR(Service_NVFlinger, "unknown api = {}", api);
+ status = Status::BadValue;
+ break;
+ }
+ }
+
+ // Call back without lock held
+ if (listener != nullptr) {
+ listener->OnBuffersReleased();
+ }
+
+ return status;
+}
+
+Status BufferQueueProducer::SetPreallocatedBuffer(s32 slot,
+ const std::shared_ptr<GraphicBuffer>& buffer) {
+ LOG_DEBUG(Service_NVFlinger, "slot {}", slot);
+
+ UNIMPLEMENTED_IF_MSG(!buffer, "buffer must be valid!");
+
+ if (slot < 0 || slot >= BufferQueueDefs::NUM_BUFFER_SLOTS) {
+ return Status::BadValue;
+ }
+
+ BufferQueueCore::AutoLock lock(core);
+
+ slots[slot] = {};
+ slots[slot].is_preallocated = true;
+ slots[slot].graphic_buffer = buffer;
+
+ core->override_max_buffer_count = core->GetPreallocatedBufferCountLocked();
+ core->default_width = buffer->Width();
+ core->default_height = buffer->Height();
+ core->default_buffer_format = buffer->Format();
+
+ core->SignalDequeueCondition();
+ buffer_wait_event->GetWritableEvent().Signal();
+
+ return Status::NoError;
+}
+
+void BufferQueueProducer::Transact(Kernel::HLERequestContext& ctx, TransactionId code, u32 flags) {
+ Status status{Status::NoError};
+ Parcel parcel_in{ctx.ReadBuffer()};
+ Parcel parcel_out{};
+
+ switch (code) {
+ case TransactionId::Connect: {
+ const auto enable_listener = parcel_in.Read<bool>();
+ const auto api = parcel_in.Read<NativeWindowApi>();
+ const auto producer_controlled_by_app = parcel_in.Read<bool>();
+
+ UNIMPLEMENTED_IF_MSG(enable_listener, "Listener is unimplemented!");
+
+ std::shared_ptr<IProducerListener> listener;
+ QueueBufferOutput output{};
+
+ status = Connect(listener, api, producer_controlled_by_app, &output);
+
+ parcel_out.Write(output);
+ break;
+ }
+ case TransactionId::SetPreallocatedBuffer: {
+ const auto slot = parcel_in.Read<s32>();
+ const auto buffer = parcel_in.ReadObject<GraphicBuffer>();
+
+ status = SetPreallocatedBuffer(slot, buffer);
+ break;
+ }
+ case TransactionId::DequeueBuffer: {
+ const auto is_async = parcel_in.Read<bool>();
+ const auto width = parcel_in.Read<u32>();
+ const auto height = parcel_in.Read<u32>();
+ const auto pixel_format = parcel_in.Read<PixelFormat>();
+ const auto usage = parcel_in.Read<u32>();
+
+ s32 slot{};
+ Fence fence{};
+
+ status = DequeueBuffer(&slot, &fence, is_async, width, height, pixel_format, usage);
+
+ parcel_out.Write(slot);
+ parcel_out.WriteObject(&fence);
+ break;
+ }
+ case TransactionId::RequestBuffer: {
+ const auto slot = parcel_in.Read<s32>();
+
+ std::shared_ptr<GraphicBuffer> buf;
+
+ status = RequestBuffer(slot, &buf);
+
+ parcel_out.WriteObject(buf);
+ break;
+ }
+ case TransactionId::QueueBuffer: {
+ const auto slot = parcel_in.Read<s32>();
+
+ QueueBufferInput input{parcel_in};
+ QueueBufferOutput output;
+
+ status = QueueBuffer(slot, input, &output);
+
+ parcel_out.Write(output);
+ break;
+ }
+ case TransactionId::Query: {
+ const auto what = parcel_in.Read<NativeWindow>();
+
+ s32 value{};
+
+ status = Query(what, &value);
+
+ parcel_out.Write(value);
+ break;
+ }
+ case TransactionId::CancelBuffer: {
+ const auto slot = parcel_in.Read<s32>();
+ const auto fence = parcel_in.ReadFlattened<Fence>();
+
+ CancelBuffer(slot, fence);
+ break;
+ }
+ case TransactionId::Disconnect: {
+ const auto api = parcel_in.Read<NativeWindowApi>();
+
+ status = Disconnect(api);
+ break;
+ }
+ case TransactionId::DetachBuffer: {
+ const auto slot = parcel_in.Read<s32>();
+
+ status = DetachBuffer(slot);
+ break;
+ }
+ case TransactionId::SetBufferCount: {
+ const auto buffer_count = parcel_in.Read<s32>();
+
+ status = SetBufferCount(buffer_count);
+ break;
+ }
+ case TransactionId::GetBufferHistory: {
+ LOG_WARNING(Service_NVFlinger, "(STUBBED) called, transaction=GetBufferHistory");
+ break;
+ }
+ default:
+ ASSERT_MSG(false, "Unimplemented");
+ }
+
+ parcel_out.Write(status);
+
+ ctx.WriteBuffer(parcel_out.Serialize());
+}
+
+Kernel::KReadableEvent& BufferQueueProducer::GetNativeHandle() {
+ return buffer_wait_event->GetReadableEvent();
+}
+
+} // namespace android
diff --git a/src/core/hle/service/nvflinger/buffer_queue_producer.h b/src/core/hle/service/nvflinger/buffer_queue_producer.h
new file mode 100644
index 000000000..fcb71a794
--- /dev/null
+++ b/src/core/hle/service/nvflinger/buffer_queue_producer.h
@@ -0,0 +1,83 @@
+// SPDX-License-Identifier: GPL-3.0-or-later
+// Copyright 2021 yuzu Emulator Project
+// Copyright 2014 The Android Open Source Project
+// Parts of this implementation were base on:
+// https://cs.android.com/android/platform/superproject/+/android-5.1.1_r38:frameworks/native/include/gui/BufferQueueProducer.h
+
+#pragma once
+
+#include <condition_variable>
+#include <memory>
+#include <mutex>
+
+#include "common/common_funcs.h"
+#include "core/hle/service/nvdrv/nvdata.h"
+#include "core/hle/service/nvflinger/binder.h"
+#include "core/hle/service/nvflinger/buffer_queue_defs.h"
+#include "core/hle/service/nvflinger/buffer_slot.h"
+#include "core/hle/service/nvflinger/graphic_buffer_producer.h"
+#include "core/hle/service/nvflinger/pixel_format.h"
+#include "core/hle/service/nvflinger/status.h"
+#include "core/hle/service/nvflinger/window.h"
+
+namespace Kernel {
+class KernelCore;
+class KEvent;
+class KReadableEvent;
+class KWritableEvent;
+} // namespace Kernel
+
+namespace Service::KernelHelpers {
+class ServiceContext;
+} // namespace Service::KernelHelpers
+
+namespace android {
+
+class BufferQueueCore;
+class IProducerListener;
+
+class BufferQueueProducer final : public IBinder {
+public:
+ explicit BufferQueueProducer(Service::KernelHelpers::ServiceContext& service_context_,
+ std::shared_ptr<BufferQueueCore> buffer_queue_core_);
+ ~BufferQueueProducer();
+
+ void Transact(Kernel::HLERequestContext& ctx, android::TransactionId code, u32 flags) override;
+
+ Kernel::KReadableEvent& GetNativeHandle() override;
+
+public:
+ Status RequestBuffer(s32 slot, std::shared_ptr<GraphicBuffer>* buf);
+ Status SetBufferCount(s32 buffer_count);
+ Status DequeueBuffer(s32* out_slot, android::Fence* out_fence, bool async, u32 width,
+ u32 height, PixelFormat format, u32 usage);
+ Status DetachBuffer(s32 slot);
+ Status DetachNextBuffer(std::shared_ptr<GraphicBuffer>* out_buffer, Fence* out_fence);
+ Status AttachBuffer(s32* outSlot, const std::shared_ptr<GraphicBuffer>& buffer);
+ Status QueueBuffer(s32 slot, const QueueBufferInput& input, QueueBufferOutput* output);
+ void CancelBuffer(s32 slot, const Fence& fence);
+ Status Query(NativeWindow what, s32* out_value);
+ Status Connect(const std::shared_ptr<IProducerListener>& listener, NativeWindowApi api,
+ bool producer_controlled_by_app, QueueBufferOutput* output);
+
+ Status Disconnect(NativeWindowApi api);
+ Status SetPreallocatedBuffer(s32 slot, const std::shared_ptr<GraphicBuffer>& buffer);
+
+private:
+ BufferQueueProducer(const BufferQueueProducer&) = delete;
+
+ Status WaitForFreeSlotThenRelock(bool async, s32* found, Status* returnFlags) const;
+
+ Kernel::KEvent* buffer_wait_event{};
+ Service::KernelHelpers::ServiceContext& service_context;
+
+ std::shared_ptr<BufferQueueCore> core;
+ BufferQueueDefs::SlotsType& slots;
+ u32 sticky_transform{};
+ std::mutex callback_mutex;
+ s32 next_callback_ticket{};
+ s32 current_callback_ticket{};
+ std::condition_variable callback_condition;
+};
+
+} // namespace android
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