1 files changed, 257 insertions, 0 deletions
diff --git a/widget/gonk/nativewindow/GonkConsumerBaseLL.cpp b/widget/gonk/nativewindow/GonkConsumerBaseLL.cpp
new file mode 100644
index 000000000..5b1166b57
--- /dev/null
+++ b/widget/gonk/nativewindow/GonkConsumerBaseLL.cpp
@@ -0,0 +1,257 @@
+/*
+ * Copyright (C) 2010 The Android Open Source Project
+ * Copyright (C) 2014 Mozilla Foundation
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#include <inttypes.h>
+
+#define LOG_TAG "GonkConsumerBase"
+#define ATRACE_TAG ATRACE_TAG_GRAPHICS
+//#define LOG_NDEBUG 0
+
+#define EGL_EGLEXT_PROTOTYPES
+
+#include <hardware/hardware.h>
+
+#include <gui/IGraphicBufferAlloc.h>
+
+#include <utils/Log.h>
+#include <utils/String8.h>
+
+#include "GonkConsumerBaseLL.h"
+
+namespace android {
+
+// Get an ID that's unique within this process.
+static int32_t createProcessUniqueId() {
+    static volatile int32_t globalCounter = 0;
+    return android_atomic_inc(&globalCounter);
+}
+
+GonkConsumerBase::GonkConsumerBase(const sp<IGonkGraphicBufferConsumer>& bufferQueue, bool controlledByApp) :
+        mAbandoned(false),
+        mConsumer(bufferQueue) {
+    // Choose a name using the PID and a process-unique ID.
+    mName = String8::format("unnamed-%d-%d", getpid(), createProcessUniqueId());
+
+    // Note that we can't create an sp<...>(this) in a ctor that will not keep a
+    // reference once the ctor ends, as that would cause the refcount of 'this'
+    // dropping to 0 at the end of the ctor.  Since all we need is a wp<...>
+    // that's what we create.
+    wp<ConsumerListener> listener = static_cast<ConsumerListener*>(this);
+    sp<IConsumerListener> proxy = new GonkBufferQueue::ProxyConsumerListener(listener);
+
+    status_t err = mConsumer->consumerConnect(proxy, controlledByApp);
+    if (err != NO_ERROR) {
+        ALOGE("GonkConsumerBase: error connecting to GonkBufferQueue: %s (%d)",
+                strerror(-err), err);
+    } else {
+        mConsumer->setConsumerName(mName);
+    }
+}
+
+GonkConsumerBase::~GonkConsumerBase() {
+    ALOGV("~GonkConsumerBase");
+    Mutex::Autolock lock(mMutex);
+
+    // Verify that abandon() has been called before we get here.  This should
+    // be done by GonkConsumerBase::onLastStrongRef(), but it's possible for a
+    // derived class to override that method and not call
+    // GonkConsumerBase::onLastStrongRef().
+    LOG_ALWAYS_FATAL_IF(!mAbandoned, "[%s] ~GonkConsumerBase was called, but the "
+        "consumer is not abandoned!", mName.string());
+}
+
+void GonkConsumerBase::onLastStrongRef(const void* id __attribute__((unused))) {
+    abandon();
+}
+
+void GonkConsumerBase::freeBufferLocked(int slotIndex) {
+    ALOGV("freeBufferLocked: slotIndex=%d", slotIndex);
+    mSlots[slotIndex].mGraphicBuffer = 0;
+    mSlots[slotIndex].mFence = Fence::NO_FENCE;
+    mSlots[slotIndex].mFrameNumber = 0;
+}
+
+#if ANDROID_VERSION == 21
+void GonkConsumerBase::onFrameAvailable() {
+#else
+void GonkConsumerBase::onFrameAvailable(const ::android::BufferItem& item) {
+#endif
+    ALOGV("onFrameAvailable");
+
+    sp<FrameAvailableListener> listener;
+    { // scope for the lock
+        Mutex::Autolock lock(mMutex);
+        listener = mFrameAvailableListener.promote();
+    }
+
+    if (listener != NULL) {
+        ALOGV("actually calling onFrameAvailable");
+        listener->onFrameAvailable();
+    }
+}
+
+void GonkConsumerBase::onBuffersReleased() {
+    Mutex::Autolock lock(mMutex);
+
+    ALOGV("onBuffersReleased");
+
+    if (mAbandoned) {
+        // Nothing to do if we're already abandoned.
+        return;
+    }
+
+    uint64_t mask = 0;
+    mConsumer->getReleasedBuffers(&mask);
+    for (int i = 0; i < GonkBufferQueue::NUM_BUFFER_SLOTS; i++) {
+        if (mask & (1ULL << i)) {
+            freeBufferLocked(i);
+        }
+    }
+}
+
+void GonkConsumerBase::onSidebandStreamChanged() {
+}
+
+void GonkConsumerBase::abandon() {
+    ALOGV("abandon");
+    Mutex::Autolock lock(mMutex);
+
+    if (!mAbandoned) {
+        abandonLocked();
+        mAbandoned = true;
+    }
+}
+
+void GonkConsumerBase::abandonLocked() {
+    ALOGV("abandonLocked");
+    for (int i =0; i < GonkBufferQueue::NUM_BUFFER_SLOTS; i++) {
+        freeBufferLocked(i);
+    }
+    // disconnect from the BufferQueue
+    mConsumer->consumerDisconnect();
+    mConsumer.clear();
+}
+
+void GonkConsumerBase::setFrameAvailableListener(
+        const wp<FrameAvailableListener>& listener) {
+    ALOGV("setFrameAvailableListener");
+    Mutex::Autolock lock(mMutex);
+    mFrameAvailableListener = listener;
+}
+
+void GonkConsumerBase::dump(String8& result) const {
+    dump(result, "");
+}
+
+void GonkConsumerBase::dump(String8& result, const char* prefix) const {
+    Mutex::Autolock _l(mMutex);
+    dumpLocked(result, prefix);
+}
+
+void GonkConsumerBase::dumpLocked(String8& result, const char* prefix) const {
+    result.appendFormat("%smAbandoned=%d\n", prefix, int(mAbandoned));
+
+    if (!mAbandoned) {
+        mConsumer->dumpToString(result, prefix);
+    }
+}
+
+status_t GonkConsumerBase::acquireBufferLocked(GonkBufferQueue::BufferItem *item,
+        nsecs_t presentWhen) {
+    status_t err = mConsumer->acquireBuffer(item, presentWhen);
+    if (err != NO_ERROR) {
+        return err;
+    }
+
+    if (item->mGraphicBuffer != NULL) {
+        mSlots[item->mBuf].mGraphicBuffer = item->mGraphicBuffer;
+    }
+
+    mSlots[item->mBuf].mFrameNumber = item->mFrameNumber;
+    mSlots[item->mBuf].mFence = item->mFence;
+
+    ALOGV("acquireBufferLocked: -> slot=%d/%" PRIu64,
+            item->mBuf, item->mFrameNumber);
+
+    return OK;
+}
+
+status_t GonkConsumerBase::addReleaseFence(int slot,
+        const sp<GraphicBuffer> graphicBuffer, const sp<Fence>& fence) {
+    Mutex::Autolock lock(mMutex);
+    return addReleaseFenceLocked(slot, graphicBuffer, fence);
+}
+
+status_t GonkConsumerBase::addReleaseFenceLocked(int slot,
+        const sp<GraphicBuffer> graphicBuffer, const sp<Fence>& fence) {
+    ALOGV("addReleaseFenceLocked: slot=%d", slot);
+
+    // If consumer no longer tracks this graphicBuffer, we can safely
+    // drop this fence, as it will never be received by the producer.
+    if (!stillTracking(slot, graphicBuffer)) {
+        return OK;
+    }
+
+    if (!mSlots[slot].mFence.get()) {
+        mSlots[slot].mFence = fence;
+    } else {
+        sp<Fence> mergedFence = Fence::merge(
+                String8::format("%.28s:%d", mName.string(), slot),
+                mSlots[slot].mFence, fence);
+        if (!mergedFence.get()) {
+            ALOGE("failed to merge release fences");
+            // synchronization is broken, the best we can do is hope fences
+            // signal in order so the new fence will act like a union
+            mSlots[slot].mFence = fence;
+            return BAD_VALUE;
+        }
+        mSlots[slot].mFence = mergedFence;
+    }
+
+    return OK;
+}
+
+status_t GonkConsumerBase::releaseBufferLocked(int slot, const sp<GraphicBuffer> graphicBuffer) {
+    // If consumer no longer tracks this graphicBuffer (we received a new
+    // buffer on the same slot), the buffer producer is definitely no longer
+    // tracking it.
+    if (!stillTracking(slot, graphicBuffer)) {
+        return OK;
+    }
+
+    ALOGV("releaseBufferLocked: slot=%d/%" PRIu64,
+            slot, mSlots[slot].mFrameNumber);
+    status_t err = mConsumer->releaseBuffer(slot, mSlots[slot].mFrameNumber, mSlots[slot].mFence);
+    if (err == IGonkGraphicBufferConsumer::STALE_BUFFER_SLOT) {
+        freeBufferLocked(slot);
+    }
+
+    mSlots[slot].mFence = Fence::NO_FENCE;
+
+    return err;
+}
+
+bool GonkConsumerBase::stillTracking(int slot,
+        const sp<GraphicBuffer> graphicBuffer) {
+    if (slot < 0 || slot >= GonkBufferQueue::NUM_BUFFER_SLOTS) {
+        return false;
+    }
+    return (mSlots[slot].mGraphicBuffer != NULL &&
+            mSlots[slot].mGraphicBuffer->handle == graphicBuffer->handle);
+}
+
+} // namespace android