Added nativemedia for video playback.

See the test.qml in src/imports/nativemedia for usage.

1 files changed, 1061 insertions, 0 deletions

diff --git a/src/imports/nativemedia/BufferQueue.cpp b/src/imports/nativemedia/BufferQueue.cpp
new file mode 100644
index 0000000..1dbd498
--- /dev/null
+++ b/src/imports/nativemedia/BufferQueue.cpp
@@ -0,0 +1,1061 @@
+/*
+ * Copyright (C) 2012 The Android Open Source Project
+ *
+ * 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.
+ */
+
+#if Q_ANDROID_VERSION_MAJOR > 4 || (Q_ANDROID_VERSION_MAJOR == 4 && Q_ANDROID_VERSION_MINOR >= 1)
+
+#define LOG_TAG "BufferQueue"
+#define ATRACE_TAG ATRACE_TAG_GRAPHICS
+//#define LOG_NDEBUG 0
+
+#define GL_GLEXT_PROTOTYPES
+#define EGL_EGLEXT_PROTOTYPES
+
+#include <EGL/egl.h>
+#include <EGL/eglext.h>
+
+#include <gui/BufferQueue.h>
+#include <gui/ISurfaceComposer.h>
+#include <private/gui/ComposerService.h>
+
+#include <utils/Log.h>
+#include <gui/SurfaceTexture.h>
+#include <utils/Trace.h>
+
+// This compile option causes SurfaceTexture to return the buffer that is currently
+// attached to the GL texture from dequeueBuffer when no other buffers are
+// available.  It requires the drivers (Gralloc, GL, OMX IL, and Camera) to do
+// implicit cross-process synchronization to prevent the buffer from being
+// written to before the buffer has (a) been detached from the GL texture and
+// (b) all GL reads from the buffer have completed.
+
+// During refactoring, do not support dequeuing the current buffer
+#undef ALLOW_DEQUEUE_CURRENT_BUFFER
+
+#ifdef ALLOW_DEQUEUE_CURRENT_BUFFER
+#define FLAG_ALLOW_DEQUEUE_CURRENT_BUFFER    true
+#warning "ALLOW_DEQUEUE_CURRENT_BUFFER enabled"
+#else
+#define FLAG_ALLOW_DEQUEUE_CURRENT_BUFFER    false
+#endif
+
+// Macros for including the BufferQueue name in log messages
+#define ST_LOGV(x, ...) ALOGV("[%s] "x, mConsumerName.string(), ##__VA_ARGS__)
+#define ST_LOGD(x, ...) ALOGD("[%s] "x, mConsumerName.string(), ##__VA_ARGS__)
+#define ST_LOGI(x, ...) ALOGI("[%s] "x, mConsumerName.string(), ##__VA_ARGS__)
+#define ST_LOGW(x, ...) ALOGW("[%s] "x, mConsumerName.string(), ##__VA_ARGS__)
+#define ST_LOGE(x, ...) ALOGE("[%s] "x, mConsumerName.string(), ##__VA_ARGS__)
+
+#define ATRACE_BUFFER_INDEX(index)                                            \
+    if (ATRACE_ENABLED()) {                                                   \
+        char ___traceBuf[1024];                                               \
+        snprintf(___traceBuf, 1024, "%s: %d", mConsumerName.string(),         \
+                (index));                                                     \
+        android::ScopedTrace ___bufTracer(ATRACE_TAG, ___traceBuf);           \
+    }
+
+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);
+}
+
+static const char* scalingModeName(int scalingMode) {
+    switch (scalingMode) {
+        case NATIVE_WINDOW_SCALING_MODE_FREEZE: return "FREEZE";
+        case NATIVE_WINDOW_SCALING_MODE_SCALE_TO_WINDOW: return "SCALE_TO_WINDOW";
+        case NATIVE_WINDOW_SCALING_MODE_SCALE_CROP: return "SCALE_CROP";
+        default: return "Unknown";
+    }
+}
+
+BufferQueue::BufferQueue(  bool allowSynchronousMode, int bufferCount ) :
+    mDefaultWidth(1),
+    mDefaultHeight(1),
+    mPixelFormat(PIXEL_FORMAT_RGBA_8888),
+    mMinUndequeuedBuffers(bufferCount),
+    mMinAsyncBufferSlots(bufferCount + 1),
+    mMinSyncBufferSlots(bufferCount),
+    mBufferCount(mMinAsyncBufferSlots),
+    mClientBufferCount(0),
+    mServerBufferCount(mMinAsyncBufferSlots),
+    mSynchronousMode(false),
+    mAllowSynchronousMode(allowSynchronousMode),
+    mConnectedApi(NO_CONNECTED_API),
+    mAbandoned(false),
+    mFrameCounter(0),
+    mBufferHasBeenQueued(false),
+    mDefaultBufferFormat(0),
+    mConsumerUsageBits(0),
+    mTransformHint(0)
+{
+    // Choose a name using the PID and a process-unique ID.
+    mConsumerName = String8::format("unnamed-%d-%d", getpid(), createProcessUniqueId());
+
+    ST_LOGV("BufferQueue");
+#if 0
+    sp<ISurfaceComposer> composer(ComposerService::getComposerService());
+    mGraphicBufferAlloc = composer->createGraphicBufferAlloc();
+    if (mGraphicBufferAlloc == 0) {
+        ST_LOGE("createGraphicBufferAlloc() failed in BufferQueue()");
+    }
+#endif
+}
+
+BufferQueue::~BufferQueue() {
+    ST_LOGV("~BufferQueue");
+}
+
+status_t BufferQueue::setBufferCountServerLocked(int bufferCount) {
+    if (bufferCount > NUM_BUFFER_SLOTS)
+        return BAD_VALUE;
+
+    // special-case, nothing to do
+    if (bufferCount == mBufferCount)
+        return OK;
+
+    if (!mClientBufferCount &&
+        bufferCount >= mBufferCount) {
+        // easy, we just have more buffers
+        mBufferCount = bufferCount;
+        mServerBufferCount = bufferCount;
+        mDequeueCondition.broadcast();
+    } else {
+        // we're here because we're either
+        // - reducing the number of available buffers
+        // - or there is a client-buffer-count in effect
+
+        // less than 2 buffers is never allowed
+        if (bufferCount < 2)
+            return BAD_VALUE;
+
+        // when there is non client-buffer-count in effect, the client is not
+        // allowed to dequeue more than one buffer at a time,
+        // so the next time they dequeue a buffer, we know that they don't
+        // own one. the actual resizing will happen during the next
+        // dequeueBuffer.
+
+        mServerBufferCount = bufferCount;
+        mDequeueCondition.broadcast();
+    }
+    return OK;
+}
+
+bool BufferQueue::isSynchronousMode() const {
+    Mutex::Autolock lock(mMutex);
+    return mSynchronousMode;
+}
+
+void BufferQueue::setConsumerName(const String8& name) {
+    Mutex::Autolock lock(mMutex);
+    mConsumerName = name;
+}
+
+status_t BufferQueue::setDefaultBufferFormat(uint32_t defaultFormat) {
+    Mutex::Autolock lock(mMutex);
+    mDefaultBufferFormat = defaultFormat;
+    return OK;
+}
+
+status_t BufferQueue::setConsumerUsageBits(uint32_t usage) {
+    Mutex::Autolock lock(mMutex);
+    mConsumerUsageBits = usage;
+    return OK;
+}
+
+status_t BufferQueue::setTransformHint(uint32_t hint) {
+    Mutex::Autolock lock(mMutex);
+    mTransformHint = hint;
+    return OK;
+}
+
+status_t BufferQueue::setBufferCount(int bufferCount) {
+    ST_LOGV("setBufferCount: count=%d", bufferCount);
+
+    sp<ConsumerListener> listener;
+    {
+        Mutex::Autolock lock(mMutex);
+
+        if (mAbandoned) {
+            ST_LOGE("setBufferCount: SurfaceTexture has been abandoned!");
+            return NO_INIT;
+        }
+        if (bufferCount > NUM_BUFFER_SLOTS) {
+            ST_LOGE("setBufferCount: bufferCount larger than slots available");
+            return BAD_VALUE;
+        }
+
+        // Error out if the user has dequeued buffers
+        for (int i=0 ; i<mBufferCount ; i++) {
+            if (mSlots[i].mBufferState == BufferSlot::DEQUEUED) {
+                ST_LOGE("setBufferCount: client owns some buffers");
+                return -EINVAL;
+            }
+        }
+
+        const int minBufferSlots = mSynchronousMode ?
+            mMinSyncBufferSlots : mMinAsyncBufferSlots;
+        if (bufferCount == 0) {
+            mClientBufferCount = 0;
+            bufferCount = (mServerBufferCount >= minBufferSlots) ?
+                    mServerBufferCount : minBufferSlots;
+            return setBufferCountServerLocked(bufferCount);
+        }
+
+        if (bufferCount < minBufferSlots) {
+            ST_LOGE("setBufferCount: requested buffer count (%d) is less than "
+                    "minimum (%d)", bufferCount, minBufferSlots);
+            return BAD_VALUE;
+        }
+
+        // here we're guaranteed that the client doesn't have dequeued buffers
+        // and will release all of its buffer references.
+        freeAllBuffersLocked();
+        mBufferCount = bufferCount;
+        mClientBufferCount = bufferCount;
+        mBufferHasBeenQueued = false;
+        mQueue.clear();
+        mDequeueCondition.broadcast();
+        listener = mConsumerListener;
+    } // scope for lock
+
+    if (listener != NULL) {
+        listener->onBuffersReleased();
+    }
+
+    return OK;
+}
+
+int BufferQueue::query(int what, int* outValue)
+{
+    ATRACE_CALL();
+    Mutex::Autolock lock(mMutex);
+
+    if (mAbandoned) {
+        ST_LOGE("query: SurfaceTexture has been abandoned!");
+        return NO_INIT;
+    }
+
+    int value;
+    switch (what) {
+    case NATIVE_WINDOW_WIDTH:
+        value = mDefaultWidth;
+        break;
+    case NATIVE_WINDOW_HEIGHT:
+        value = mDefaultHeight;
+        break;
+    case NATIVE_WINDOW_FORMAT:
+        value = mPixelFormat;
+        break;
+    case NATIVE_WINDOW_MIN_UNDEQUEUED_BUFFERS:
+        value = mSynchronousMode ?
+                (mMinUndequeuedBuffers-1) : mMinUndequeuedBuffers;
+        break;
+    case NATIVE_WINDOW_CONSUMER_RUNNING_BEHIND:
+        value = (mQueue.size() >= 2);
+        break;
+    default:
+        return BAD_VALUE;
+    }
+    outValue[0] = value;
+    return NO_ERROR;
+}
+
+status_t BufferQueue::requestBuffer(int slot, sp<GraphicBuffer>* buf) {
+    ATRACE_CALL();
+    ST_LOGV("requestBuffer: slot=%d", slot);
+    Mutex::Autolock lock(mMutex);
+    if (mAbandoned) {
+        ST_LOGE("requestBuffer: SurfaceTexture has been abandoned!");
+        return NO_INIT;
+    }
+    if (slot < 0 || mBufferCount <= slot) {
+        ST_LOGE("requestBuffer: slot index out of range [0, %d]: %d",
+                mBufferCount, slot);
+        return BAD_VALUE;
+    }
+    mSlots[slot].mRequestBufferCalled = true;
+    *buf = mSlots[slot].mGraphicBuffer;
+    return NO_ERROR;
+}
+
+status_t BufferQueue::dequeueBuffer(int *outBuf, uint32_t w, uint32_t h,
+        uint32_t format, uint32_t usage) {
+    ATRACE_CALL();
+    ST_LOGV("dequeueBuffer: w=%d h=%d fmt=%#x usage=%#x", w, h, format, usage);
+
+    if ((w && !h) || (!w && h)) {
+        ST_LOGE("dequeueBuffer: invalid size: w=%u, h=%u", w, h);
+        return BAD_VALUE;
+    }
+
+    status_t returnFlags(OK);
+    EGLDisplay dpy = EGL_NO_DISPLAY;
+    EGLSyncKHR fence = EGL_NO_SYNC_KHR;
+
+    { // Scope for the lock
+        Mutex::Autolock lock(mMutex);
+
+        if (format == 0) {
+            format = mDefaultBufferFormat;
+        }
+        // turn on usage bits the consumer requested
+        usage |= mConsumerUsageBits;
+
+        int found = -1;
+        int foundSync = -1;
+        int dequeuedCount = 0;
+        bool tryAgain = true;
+        while (tryAgain) {
+            if (mAbandoned) {
+                ST_LOGE("dequeueBuffer: SurfaceTexture has been abandoned!");
+                return NO_INIT;
+            }
+
+            // We need to wait for the FIFO to drain if the number of buffer
+            // needs to change.
+            //
+            // The condition "number of buffers needs to change" is true if
+            // - the client doesn't care about how many buffers there are
+            // - AND the actual number of buffer is different from what was
+            //   set in the last setBufferCountServer()
+            //                         - OR -
+            //   setBufferCountServer() was set to a value incompatible with
+            //   the synchronization mode (for instance because the sync mode
+            //   changed since)
+            //
+            // As long as this condition is true AND the FIFO is not empty, we
+            // wait on mDequeueCondition.
+
+            const int minBufferCountNeeded = mSynchronousMode ?
+                    mMinSyncBufferSlots : mMinAsyncBufferSlots;
+
+            const bool numberOfBuffersNeedsToChange = !mClientBufferCount &&
+                    ((mServerBufferCount != mBufferCount) ||
+                            (mServerBufferCount < minBufferCountNeeded));
+
+            if (!mQueue.isEmpty() && numberOfBuffersNeedsToChange) {
+                // wait for the FIFO to drain
+                mDequeueCondition.wait(mMutex);
+                // NOTE: we continue here because we need to reevaluate our
+                // whole state (eg: we could be abandoned or disconnected)
+                continue;
+            }
+
+            if (numberOfBuffersNeedsToChange) {
+                // here we're guaranteed that mQueue is empty
+                freeAllBuffersLocked();
+                mBufferCount = mServerBufferCount;
+                if (mBufferCount < minBufferCountNeeded)
+                    mBufferCount = minBufferCountNeeded;
+                mBufferHasBeenQueued = false;
+                returnFlags |= ISurfaceTexture::RELEASE_ALL_BUFFERS;
+            }
+
+            // look for a free buffer to give to the client
+            found = INVALID_BUFFER_SLOT;
+            foundSync = INVALID_BUFFER_SLOT;
+            dequeuedCount = 0;
+            for (int i = 0; i < mBufferCount; i++) {
+                const int state = mSlots[i].mBufferState;
+                if (state == BufferSlot::DEQUEUED) {
+                    dequeuedCount++;
+                }
+
+                // this logic used to be if (FLAG_ALLOW_DEQUEUE_CURRENT_BUFFER)
+                // but dequeuing the current buffer is disabled.
+                if (false) {
+                    // This functionality has been temporarily removed so
+                    // BufferQueue and SurfaceTexture can be refactored into
+                    // separate objects
+                } else {
+                    if (state == BufferSlot::FREE) {
+                        /* We return the oldest of the free buffers to avoid
+                         * stalling the producer if possible.  This is because
+                         * the consumer may still have pending reads of the
+                         * buffers in flight.
+                         */
+                        bool isOlder = mSlots[i].mFrameNumber <
+                                mSlots[found].mFrameNumber;
+                        if (found < 0 || isOlder) {
+                            foundSync = i;
+                            found = i;
+                        }
+                    }
+                }
+            }
+
+            // clients are not allowed to dequeue more than one buffer
+            // if they didn't set a buffer count.
+            if (!mClientBufferCount && dequeuedCount) {
+                ST_LOGE("dequeueBuffer: can't dequeue multiple buffers without "
+                        "setting the buffer count");
+                return -EINVAL;
+            }
+
+            // See whether a buffer has been queued since the last
+            // setBufferCount so we know whether to perform the
+            // mMinUndequeuedBuffers check below.
+            if (mBufferHasBeenQueued) {
+                // make sure the client is not trying to dequeue more buffers
+                // than allowed.
+                const int avail = mBufferCount - (dequeuedCount+1);
+                if (avail < (mMinUndequeuedBuffers-int(mSynchronousMode))) {
+                    ST_LOGE("dequeueBuffer: mMinUndequeuedBuffers=%d exceeded "
+                            "(dequeued=%d)",
+                            mMinUndequeuedBuffers-int(mSynchronousMode),
+                            dequeuedCount);
+                    return -EBUSY;
+                }
+            }
+
+            // if no buffer is found, wait for a buffer to be released
+            tryAgain = found == INVALID_BUFFER_SLOT;
+            if (tryAgain) {
+                mDequeueCondition.wait(mMutex);
+            }
+        }
+
+
+        if (found == INVALID_BUFFER_SLOT) {
+            // This should not happen.
+            ST_LOGE("dequeueBuffer: no available buffer slots");
+            return -EBUSY;
+        }
+
+        const int buf = found;
+        *outBuf = found;
+
+        ATRACE_BUFFER_INDEX(buf);
+
+        const bool useDefaultSize = !w && !h;
+        if (useDefaultSize) {
+            // use the default size
+            w = mDefaultWidth;
+            h = mDefaultHeight;
+        }
+
+        const bool updateFormat = (format != 0);
+        if (!updateFormat) {
+            // keep the current (or default) format
+            format = mPixelFormat;
+        }
+
+        // buffer is now in DEQUEUED (but can also be current at the same time,
+        // if we're in synchronous mode)
+        mSlots[buf].mBufferState = BufferSlot::DEQUEUED;
+
+        const sp<GraphicBuffer>& buffer(mSlots[buf].mGraphicBuffer);
+        if ((buffer == NULL) ||
+            (uint32_t(buffer->width)  != w) ||
+            (uint32_t(buffer->height) != h) ||
+            (uint32_t(buffer->format) != format) ||
+            ((uint32_t(buffer->usage) & usage) != usage))
+        {
+            status_t error;
+            sp<GraphicBuffer> graphicBuffer = new GraphicBuffer(w, h, format, usage);
+            if (graphicBuffer == 0) {
+                ST_LOGE("dequeueBuffer: SurfaceComposer::createGraphicBuffer "
+                        "failed");
+                return error;
+            }
+            if (updateFormat) {
+                mPixelFormat = format;
+            }
+
+            mSlots[buf].mAcquireCalled = false;
+            mSlots[buf].mGraphicBuffer = graphicBuffer;
+            mSlots[buf].mRequestBufferCalled = false;
+            mSlots[buf].mFence = EGL_NO_SYNC_KHR;
+            mSlots[buf].mEglDisplay = EGL_NO_DISPLAY;
+
+            returnFlags |= ISurfaceTexture::BUFFER_NEEDS_REALLOCATION;
+        }
+
+        dpy = mSlots[buf].mEglDisplay;
+        fence = mSlots[buf].mFence;
+        mSlots[buf].mFence = EGL_NO_SYNC_KHR;
+    }  // end lock scope
+
+    if (fence != EGL_NO_SYNC_KHR) {
+        EGLint result = eglClientWaitSyncKHR(dpy, fence, 0, 1000000000);
+        // If something goes wrong, log the error, but return the buffer without
+        // synchronizing access to it.  It's too late at this point to abort the
+        // dequeue operation.
+        if (result == EGL_FALSE) {
+            ST_LOGE("dequeueBuffer: error waiting for fence: %#x", eglGetError());
+        } else if (result == EGL_TIMEOUT_EXPIRED_KHR) {
+            ST_LOGE("dequeueBuffer: timeout waiting for fence");
+        }
+        eglDestroySyncKHR(dpy, fence);
+    }
+
+    ST_LOGV("dequeueBuffer: returning slot=%d buf=%p flags=%#x", *outBuf,
+            mSlots[*outBuf].mGraphicBuffer->handle, returnFlags);
+
+    return returnFlags;
+}
+
+status_t BufferQueue::setSynchronousMode(bool enabled) {
+    ATRACE_CALL();
+    ST_LOGV("setSynchronousMode: enabled=%d", enabled);
+    Mutex::Autolock lock(mMutex);
+
+    if (mAbandoned) {
+        ST_LOGE("setSynchronousMode: SurfaceTexture has been abandoned!");
+        return NO_INIT;
+    }
+
+    status_t err = OK;
+    if (!mAllowSynchronousMode && enabled)
+        return err;
+
+    if (!enabled) {
+        // going to asynchronous mode, drain the queue
+        err = drainQueueLocked();
+        if (err != NO_ERROR)
+            return err;
+    }
+
+    if (mSynchronousMode != enabled) {
+        // - if we're going to asynchronous mode, the queue is guaranteed to be
+        // empty here
+        // - if the client set the number of buffers, we're guaranteed that
+        // we have at least 3 (because we don't allow less)
+        mSynchronousMode = enabled;
+        mDequeueCondition.broadcast();
+    }
+    return err;
+}
+
+status_t BufferQueue::queueBuffer(int buf,
+        const QueueBufferInput& input, QueueBufferOutput* output) {
+    ATRACE_CALL();
+    ATRACE_BUFFER_INDEX(buf);
+
+    Rect crop;
+    uint32_t transform;
+    int scalingMode;
+    int64_t timestamp;
+
+    input.deflate(&timestamp, &crop, &scalingMode, &transform);
+
+    ST_LOGV("queueBuffer: slot=%d time=%#llx crop=[%d,%d,%d,%d] tr=%#x "
+            "scale=%s",
+            buf, timestamp, crop.left, crop.top, crop.right, crop.bottom,
+            transform, scalingModeName(scalingMode));
+
+    sp<ConsumerListener> listener;
+
+    { // scope for the lock
+        Mutex::Autolock lock(mMutex);
+        if (mAbandoned) {
+            ST_LOGE("queueBuffer: SurfaceTexture has been abandoned!");
+            return NO_INIT;
+        }
+        if (buf < 0 || buf >= mBufferCount) {
+            ST_LOGE("queueBuffer: slot index out of range [0, %d]: %d",
+                    mBufferCount, buf);
+            return -EINVAL;
+        } else if (mSlots[buf].mBufferState != BufferSlot::DEQUEUED) {
+            ST_LOGE("queueBuffer: slot %d is not owned by the client "
+                    "(state=%d)", buf, mSlots[buf].mBufferState);
+            return -EINVAL;
+        } else if (!mSlots[buf].mRequestBufferCalled) {
+            ST_LOGE("queueBuffer: slot %d was enqueued without requesting a "
+                    "buffer", buf);
+            return -EINVAL;
+        }
+
+        const sp<GraphicBuffer>& graphicBuffer(mSlots[buf].mGraphicBuffer);
+        Rect bufferRect(graphicBuffer->getWidth(), graphicBuffer->getHeight());
+        Rect croppedCrop;
+        crop.intersect(bufferRect, &croppedCrop);
+        if (croppedCrop != crop) {
+            ST_LOGE("queueBuffer: crop rect is not contained within the "
+                    "buffer in slot %d", buf);
+            return -EINVAL;
+        }
+
+        if (mSynchronousMode) {
+            // In synchronous mode we queue all buffers in a FIFO.
+            mQueue.push_back(buf);
+
+            // Synchronous mode always signals that an additional frame should
+            // be consumed.
+            listener = mConsumerListener;
+        } else {
+            // In asynchronous mode we only keep the most recent buffer.
+            if (mQueue.empty()) {
+                mQueue.push_back(buf);
+
+                // Asynchronous mode only signals that a frame should be
+                // consumed if no previous frame was pending. If a frame were
+                // pending then the consumer would have already been notified.
+                listener = mConsumerListener;
+            } else {
+                Fifo::iterator front(mQueue.begin());
+                // buffer currently queued is freed
+                mSlots[*front].mBufferState = BufferSlot::FREE;
+                // and we record the new buffer index in the queued list
+                *front = buf;
+            }
+        }
+
+        mSlots[buf].mTimestamp = timestamp;
+        mSlots[buf].mCrop = crop;
+        mSlots[buf].mTransform = transform;
+
+        switch (scalingMode) {
+            case NATIVE_WINDOW_SCALING_MODE_FREEZE:
+            case NATIVE_WINDOW_SCALING_MODE_SCALE_TO_WINDOW:
+            case NATIVE_WINDOW_SCALING_MODE_SCALE_CROP:
+                break;
+            default:
+                ST_LOGE("unknown scaling mode: %d (ignoring)", scalingMode);
+                scalingMode = mSlots[buf].mScalingMode;
+                break;
+        }
+
+        mSlots[buf].mBufferState = BufferSlot::QUEUED;
+        mSlots[buf].mScalingMode = scalingMode;
+        mFrameCounter++;
+        mSlots[buf].mFrameNumber = mFrameCounter;
+
+        mBufferHasBeenQueued = true;
+        mDequeueCondition.broadcast();
+
+        output->inflate(mDefaultWidth, mDefaultHeight, mTransformHint,
+                mQueue.size());
+
+        ATRACE_INT(mConsumerName.string(), mQueue.size());
+    } // scope for the lock
+
+    // call back without lock held
+    if (listener != 0) {
+        listener->onFrameAvailable();
+    }
+    return OK;
+}
+
+void BufferQueue::cancelBuffer(int buf) {
+    ATRACE_CALL();
+    ST_LOGV("cancelBuffer: slot=%d", buf);
+    Mutex::Autolock lock(mMutex);
+
+    if (mAbandoned) {
+        ST_LOGW("cancelBuffer: BufferQueue has been abandoned!");
+        return;
+    }
+
+    if (buf < 0 || buf >= mBufferCount) {
+        ST_LOGE("cancelBuffer: slot index out of range [0, %d]: %d",
+                mBufferCount, buf);
+        return;
+    } else if (mSlots[buf].mBufferState != BufferSlot::DEQUEUED) {
+        ST_LOGE("cancelBuffer: slot %d is not owned by the client (state=%d)",
+                buf, mSlots[buf].mBufferState);
+        return;
+    }
+    mSlots[buf].mBufferState = BufferSlot::FREE;
+    mSlots[buf].mFrameNumber = 0;
+    mDequeueCondition.broadcast();
+}
+
+status_t BufferQueue::connect(int api, QueueBufferOutput* output) {
+    ATRACE_CALL();
+    ST_LOGV("connect: api=%d", api);
+    Mutex::Autolock lock(mMutex);
+
+    if (mAbandoned) {
+        ST_LOGE("connect: BufferQueue has been abandoned!");
+        return NO_INIT;
+    }
+
+    if (mConsumerListener == NULL) {
+        ST_LOGE("connect: BufferQueue has no consumer!");
+        return NO_INIT;
+    }
+
+    int err = NO_ERROR;
+    switch (api) {
+        case NATIVE_WINDOW_API_EGL:
+        case NATIVE_WINDOW_API_CPU:
+        case NATIVE_WINDOW_API_MEDIA:
+        case NATIVE_WINDOW_API_CAMERA:
+            if (mConnectedApi != NO_CONNECTED_API) {
+                ST_LOGE("connect: already connected (cur=%d, req=%d)",
+                        mConnectedApi, api);
+                err = -EINVAL;
+            } else {
+                mConnectedApi = api;
+                output->inflate(mDefaultWidth, mDefaultHeight, mTransformHint,
+                        mQueue.size());
+            }
+            break;
+        default:
+            err = -EINVAL;
+            break;
+    }
+
+    mBufferHasBeenQueued = false;
+
+    return err;
+}
+
+status_t BufferQueue::disconnect(int api) {
+    ATRACE_CALL();
+    ST_LOGV("disconnect: api=%d", api);
+
+    int err = NO_ERROR;
+    sp<ConsumerListener> listener;
+
+    { // Scope for the lock
+        Mutex::Autolock lock(mMutex);
+
+        if (mAbandoned) {
+            // it is not really an error to disconnect after the surface
+            // has been abandoned, it should just be a no-op.
+            return NO_ERROR;
+        }
+
+        switch (api) {
+            case NATIVE_WINDOW_API_EGL:
+            case NATIVE_WINDOW_API_CPU:
+            case NATIVE_WINDOW_API_MEDIA:
+            case NATIVE_WINDOW_API_CAMERA:
+                if (mConnectedApi == api) {
+                    drainQueueAndFreeBuffersLocked();
+                    mConnectedApi = NO_CONNECTED_API;
+                    mDequeueCondition.broadcast();
+                    listener = mConsumerListener;
+                } else {
+                    ST_LOGE("disconnect: connected to another api (cur=%d, req=%d)",
+                            mConnectedApi, api);
+                    err = -EINVAL;
+                }
+                break;
+            default:
+                ST_LOGE("disconnect: unknown API %d", api);
+                err = -EINVAL;
+                break;
+        }
+    }
+
+    if (listener != NULL) {
+        listener->onBuffersReleased();
+    }
+
+    return err;
+}
+
+void BufferQueue::dump(String8& result) const
+{
+    char buffer[1024];
+    BufferQueue::dump(result, "", buffer, 1024);
+}
+
+void BufferQueue::dump(String8& result, const char* prefix,
+        char* buffer, size_t SIZE) const
+{
+    Mutex::Autolock _l(mMutex);
+
+    String8 fifo;
+    int fifoSize = 0;
+    Fifo::const_iterator i(mQueue.begin());
+    while (i != mQueue.end()) {
+       snprintf(buffer, SIZE, "%02d ", *i++);
+       fifoSize++;
+       fifo.append(buffer);
+    }
+
+    snprintf(buffer, SIZE,
+            "%s-BufferQueue mBufferCount=%d, mSynchronousMode=%d, default-size=[%dx%d], "
+            "mPixelFormat=%d, FIFO(%d)={%s}\n",
+            prefix, mBufferCount, mSynchronousMode, mDefaultWidth,
+            mDefaultHeight, mPixelFormat, fifoSize, fifo.string());
+    result.append(buffer);
+
+
+    struct {
+        const char * operator()(int state) const {
+            switch (state) {
+                case BufferSlot::DEQUEUED: return "DEQUEUED";
+                case BufferSlot::QUEUED: return "QUEUED";
+                case BufferSlot::FREE: return "FREE";
+                case BufferSlot::ACQUIRED: return "ACQUIRED";
+                default: return "Unknown";
+            }
+        }
+    } stateName;
+
+    for (int i=0 ; i<mBufferCount ; i++) {
+        const BufferSlot& slot(mSlots[i]);
+        snprintf(buffer, SIZE,
+                "%s%s[%02d] "
+                "state=%-8s, crop=[%d,%d,%d,%d], "
+                "xform=0x%02x, time=%#llx, scale=%s",
+                prefix, (slot.mBufferState == BufferSlot::ACQUIRED)?">":" ", i,
+                stateName(slot.mBufferState),
+                slot.mCrop.left, slot.mCrop.top, slot.mCrop.right,
+                slot.mCrop.bottom, slot.mTransform, slot.mTimestamp,
+                scalingModeName(slot.mScalingMode)
+        );
+        result.append(buffer);
+
+        const sp<GraphicBuffer>& buf(slot.mGraphicBuffer);
+        if (buf != NULL) {
+            snprintf(buffer, SIZE,
+                    ", %p [%4ux%4u:%4u,%3X]",
+                    buf->handle, buf->width, buf->height, buf->stride,
+                    buf->format);
+            result.append(buffer);
+        }
+        result.append("\n");
+    }
+}
+
+void BufferQueue::freeBufferLocked(int i) {
+    mSlots[i].mGraphicBuffer = 0;
+    if (mSlots[i].mBufferState == BufferSlot::ACQUIRED) {
+        mSlots[i].mNeedsCleanupOnRelease = true;
+    }
+    mSlots[i].mBufferState = BufferSlot::FREE;
+    mSlots[i].mFrameNumber = 0;
+    mSlots[i].mAcquireCalled = false;
+
+    // destroy fence as BufferQueue now takes ownership
+    if (mSlots[i].mFence != EGL_NO_SYNC_KHR) {
+        eglDestroySyncKHR(mSlots[i].mEglDisplay, mSlots[i].mFence);
+        mSlots[i].mFence = EGL_NO_SYNC_KHR;
+    }
+}
+
+void BufferQueue::freeAllBuffersLocked() {
+    ALOGW_IF(!mQueue.isEmpty(),
+            "freeAllBuffersLocked called but mQueue is not empty");
+    mQueue.clear();
+    mBufferHasBeenQueued = false;
+    for (int i = 0; i < NUM_BUFFER_SLOTS; i++) {
+        freeBufferLocked(i);
+    }
+}
+
+status_t BufferQueue::acquireBuffer(BufferItem *buffer) {
+    ATRACE_CALL();
+    Mutex::Autolock _l(mMutex);
+    // check if queue is empty
+    // In asynchronous mode the list is guaranteed to be one buffer
+    // deep, while in synchronous mode we use the oldest buffer.
+    if (!mQueue.empty()) {
+        Fifo::iterator front(mQueue.begin());
+        int buf = *front;
+
+        ATRACE_BUFFER_INDEX(buf);
+
+        if (mSlots[buf].mAcquireCalled) {
+            buffer->mGraphicBuffer = NULL;
+        } else {
+            buffer->mGraphicBuffer = mSlots[buf].mGraphicBuffer;
+        }
+        buffer->mCrop = mSlots[buf].mCrop;
+        buffer->mTransform = mSlots[buf].mTransform;
+        buffer->mScalingMode = mSlots[buf].mScalingMode;
+        buffer->mFrameNumber = mSlots[buf].mFrameNumber;
+        buffer->mTimestamp = mSlots[buf].mTimestamp;
+        buffer->mBuf = buf;
+        mSlots[buf].mAcquireCalled = true;
+
+        mSlots[buf].mBufferState = BufferSlot::ACQUIRED;
+        mQueue.erase(front);
+        mDequeueCondition.broadcast();
+
+        ATRACE_INT(mConsumerName.string(), mQueue.size());
+    } else {
+        return NO_BUFFER_AVAILABLE;
+    }
+
+    return OK;
+}
+
+status_t BufferQueue::releaseBuffer(int buf, EGLDisplay display,
+        EGLSyncKHR fence) {
+    ATRACE_CALL();
+    ATRACE_BUFFER_INDEX(buf);
+
+    Mutex::Autolock _l(mMutex);
+
+    if (buf == INVALID_BUFFER_SLOT) {
+        return -EINVAL;
+    }
+
+    mSlots[buf].mEglDisplay = display;
+    mSlots[buf].mFence = fence;
+
+    // The buffer can now only be released if its in the acquired state
+    if (mSlots[buf].mBufferState == BufferSlot::ACQUIRED) {
+        mSlots[buf].mBufferState = BufferSlot::FREE;
+    } else if (mSlots[buf].mNeedsCleanupOnRelease) {
+        ST_LOGV("releasing a stale buf %d its state was %d", buf, mSlots[buf].mBufferState);
+        mSlots[buf].mNeedsCleanupOnRelease = false;
+        return STALE_BUFFER_SLOT;
+    } else {
+        ST_LOGE("attempted to release buf %d but its state was %d", buf, mSlots[buf].mBufferState);
+        return -EINVAL;
+    }
+
+    mDequeueCondition.broadcast();
+    return OK;
+}
+
+status_t BufferQueue::consumerConnect(const sp<ConsumerListener>& consumerListener) {
+    ST_LOGV("consumerConnect");
+    Mutex::Autolock lock(mMutex);
+
+    if (mAbandoned) {
+        ST_LOGE("consumerConnect: BufferQueue has been abandoned!");
+        return NO_INIT;
+    }
+
+    mConsumerListener = consumerListener;
+
+    return OK;
+}
+
+status_t BufferQueue::consumerDisconnect() {
+    ST_LOGV("consumerDisconnect");
+    Mutex::Autolock lock(mMutex);
+
+    if (mConsumerListener == NULL) {
+        ST_LOGE("consumerDisconnect: No consumer is connected!");
+        return -EINVAL;
+    }
+
+    mAbandoned = true;
+    mConsumerListener = NULL;
+    mQueue.clear();
+    freeAllBuffersLocked();
+    mDequeueCondition.broadcast();
+    return OK;
+}
+
+status_t BufferQueue::getReleasedBuffers(uint32_t* slotMask) {
+    ST_LOGV("getReleasedBuffers");
+    Mutex::Autolock lock(mMutex);
+
+    if (mAbandoned) {
+        ST_LOGE("getReleasedBuffers: BufferQueue has been abandoned!");
+        return NO_INIT;
+    }
+
+    uint32_t mask = 0;
+    for (int i = 0; i < NUM_BUFFER_SLOTS; i++) {
+        if (!mSlots[i].mAcquireCalled) {
+            mask |= 1 << i;
+        }
+    }
+    *slotMask = mask;
+
+    ST_LOGV("getReleasedBuffers: returning mask %#x", mask);
+    return NO_ERROR;
+}
+
+status_t BufferQueue::setDefaultBufferSize(uint32_t w, uint32_t h)
+{
+    ST_LOGV("setDefaultBufferSize: w=%d, h=%d", w, h);
+    if (!w || !h) {
+        ST_LOGE("setDefaultBufferSize: dimensions cannot be 0 (w=%d, h=%d)",
+                w, h);
+        return BAD_VALUE;
+    }
+
+    Mutex::Autolock lock(mMutex);
+    mDefaultWidth = w;
+    mDefaultHeight = h;
+    return OK;
+}
+
+status_t BufferQueue::setBufferCountServer(int bufferCount) {
+    ATRACE_CALL();
+    Mutex::Autolock lock(mMutex);
+    return setBufferCountServerLocked(bufferCount);
+}
+
+void BufferQueue::freeAllBuffersExceptHeadLocked() {
+    int head = -1;
+    if (!mQueue.empty()) {
+        Fifo::iterator front(mQueue.begin());
+        head = *front;
+    }
+    mBufferHasBeenQueued = false;
+    for (int i = 0; i < NUM_BUFFER_SLOTS; i++) {
+        if (i != head) {
+            freeBufferLocked(i);
+        }
+    }
+}
+
+status_t BufferQueue::drainQueueLocked() {
+    while (mSynchronousMode && !mQueue.isEmpty()) {
+        mDequeueCondition.wait(mMutex);
+        if (mAbandoned) {
+            ST_LOGE("drainQueueLocked: BufferQueue has been abandoned!");
+            return NO_INIT;
+        }
+        if (mConnectedApi == NO_CONNECTED_API) {
+            ST_LOGE("drainQueueLocked: BufferQueue is not connected!");
+            return NO_INIT;
+        }
+    }
+    return NO_ERROR;
+}
+
+status_t BufferQueue::drainQueueAndFreeBuffersLocked() {
+    status_t err = drainQueueLocked();
+    if (err == NO_ERROR) {
+        if (mSynchronousMode) {
+            freeAllBuffersLocked();
+        } else {
+            freeAllBuffersExceptHeadLocked();
+        }
+    }
+    return err;
+}
+
+BufferQueue::ProxyConsumerListener::ProxyConsumerListener(
+        const wp<BufferQueue::ConsumerListener>& consumerListener):
+        mConsumerListener(consumerListener) {}
+
+BufferQueue::ProxyConsumerListener::~ProxyConsumerListener() {}
+
+void BufferQueue::ProxyConsumerListener::onFrameAvailable() {
+    sp<BufferQueue::ConsumerListener> listener(mConsumerListener.promote());
+    if (listener != NULL) {
+        listener->onFrameAvailable();
+    }
+}
+
+void BufferQueue::ProxyConsumerListener::onBuffersReleased() {
+    sp<BufferQueue::ConsumerListener> listener(mConsumerListener.promote());
+    if (listener != NULL) {
+        listener->onBuffersReleased();
+    }
+}
+
+}; // namespace android
+
+#endif