status_t CpuConsumer::lockNextBuffer(LockedBuffer *nativeBuffer) {
status_t err;
if (!nativeBuffer) return BAD_VALUE;
if (mCurrentLockedBuffers == mMaxLockedBuffers) {
return INVALID_OPERATION;
}
BufferQueue::BufferItem b;
Mutex::Autolock _l(mMutex);
err = acquireBufferLocked(&b);
if (err != OK) {
if (err == BufferQueue::NO_BUFFER_AVAILABLE) {
return BAD_VALUE;
} else {
CC_LOGE("Error acquiring buffer: %s (%d)", strerror(err), err);
return err;
}
}
int buf = b.mBuf;
if (b.mFence.get()) {
err = b.mFence->waitForever("CpuConsumer::lockNextBuffer");
if (err != OK) {
CC_LOGE("Failed to wait for fence of acquired buffer: %s (%d)",
strerror(-err), err);
return err;
}
}
void *bufferPointer = NULL;
android_ycbcr ycbcr = android_ycbcr();
if (mSlots[buf].mGraphicBuffer->getPixelFormat() ==
HAL_PIXEL_FORMAT_YCbCr_420_888) {
err = mSlots[buf].mGraphicBuffer->lockYCbCr(
GraphicBuffer::USAGE_SW_READ_OFTEN,
b.mCrop,
&ycbcr);
if (err != OK) {
CC_LOGE("Unable to lock YCbCr buffer for CPU reading: %s (%d)",
strerror(-err), err);
return err;
}
bufferPointer = ycbcr.y;
} else {
err = mSlots[buf].mGraphicBuffer->lock(
GraphicBuffer::USAGE_SW_READ_OFTEN,
b.mCrop,
&bufferPointer);
if (err != OK) {
CC_LOGE("Unable to lock buffer for CPU reading: %s (%d)",
strerror(-err), err);
return err;
}
}
size_t lockedIdx = 0;
for (; lockedIdx < mMaxLockedBuffers; lockedIdx++) {
if (mAcquiredBuffers[lockedIdx].mSlot ==
BufferQueue::INVALID_BUFFER_SLOT) {
break;
}
}
assert(lockedIdx < mMaxLockedBuffers);
AcquiredBuffer &ab = mAcquiredBuffers.editItemAt(lockedIdx);
ab.mSlot = buf;
ab.mBufferPointer = bufferPointer;
ab.mGraphicBuffer = mSlots[buf].mGraphicBuffer;
nativeBuffer->data =
reinterpret_cast<uint8_t*>(bufferPointer);
nativeBuffer->width = mSlots[buf].mGraphicBuffer->getWidth();
nativeBuffer->height = mSlots[buf].mGraphicBuffer->getHeight();
nativeBuffer->format = mSlots[buf].mGraphicBuffer->getPixelFormat();
nativeBuffer->stride = (ycbcr.y != NULL) ?
ycbcr.ystride :
mSlots[buf].mGraphicBuffer->getStride();
nativeBuffer->crop = b.mCrop;
nativeBuffer->transform = b.mTransform;
nativeBuffer->scalingMode = b.mScalingMode;
nativeBuffer->timestamp = b.mTimestamp;
nativeBuffer->frameNumber = b.mFrameNumber;
nativeBuffer->dataCb = reinterpret_cast<uint8_t*>(ycbcr.cb);
nativeBuffer->dataCr = reinterpret_cast<uint8_t*>(ycbcr.cr);
nativeBuffer->chromaStride = ycbcr.cstride;
nativeBuffer->chromaStep = ycbcr.chroma_step;
mCurrentLockedBuffers++;
return OK;
}
status_t CpuConsumer::lockNextBuffer(LockedBuffer *nativeBuffer) {
status_t err;
if (!nativeBuffer) return BAD_VALUE;
if (mCurrentLockedBuffers == mMaxLockedBuffers) {
CC_LOGW("Max buffers have been locked (%zd), cannot lock anymore.",
mMaxLockedBuffers);
return NOT_ENOUGH_DATA;
}
BufferItem b;
Mutex::Autolock _l(mMutex);
err = acquireBufferLocked(&b, 0);
if (err != OK) {
if (err == BufferQueue::NO_BUFFER_AVAILABLE) {
return BAD_VALUE;
} else {
CC_LOGE("Error acquiring buffer: %s (%d)", strerror(err), err);
return err;
}
}
int slot = b.mSlot;
void *bufferPointer = NULL;
android_ycbcr ycbcr = android_ycbcr();
PixelFormat format = mSlots[slot].mGraphicBuffer->getPixelFormat();
PixelFormat flexFormat = format;
if (isPossiblyYUV(format)) {
if (b.mFence.get()) {
err = mSlots[slot].mGraphicBuffer->lockAsyncYCbCr(
GraphicBuffer::USAGE_SW_READ_OFTEN,
b.mCrop,
&ycbcr,
b.mFence->dup());
} else {
err = mSlots[slot].mGraphicBuffer->lockYCbCr(
GraphicBuffer::USAGE_SW_READ_OFTEN,
b.mCrop,
&ycbcr);
}
if (err == OK) {
bufferPointer = ycbcr.y;
flexFormat = HAL_PIXEL_FORMAT_YCbCr_420_888;
if (format != HAL_PIXEL_FORMAT_YCbCr_420_888) {
CC_LOGV("locking buffer of format %#x as flex YUV", format);
}
} else if (format == HAL_PIXEL_FORMAT_YCbCr_420_888) {
CC_LOGE("Unable to lock YCbCr buffer for CPU reading: %s (%d)",
strerror(-err), err);
return err;
}
}
if (bufferPointer == NULL) { // not flexible YUV
if (b.mFence.get()) {
err = mSlots[slot].mGraphicBuffer->lockAsync(
GraphicBuffer::USAGE_SW_READ_OFTEN,
b.mCrop,
&bufferPointer,
b.mFence->dup());
} else {
err = mSlots[slot].mGraphicBuffer->lock(
GraphicBuffer::USAGE_SW_READ_OFTEN,
b.mCrop,
&bufferPointer);
}
if (err != OK) {
CC_LOGE("Unable to lock buffer for CPU reading: %s (%d)",
strerror(-err), err);
return err;
}
}
size_t lockedIdx = 0;
for (; lockedIdx < static_cast<size_t>(mMaxLockedBuffers); lockedIdx++) {
if (mAcquiredBuffers[lockedIdx].mSlot ==
BufferQueue::INVALID_BUFFER_SLOT) {
break;
}
}
assert(lockedIdx < mMaxLockedBuffers);
AcquiredBuffer &ab = mAcquiredBuffers.editItemAt(lockedIdx);
ab.mSlot = slot;
ab.mBufferPointer = bufferPointer;
ab.mGraphicBuffer = mSlots[slot].mGraphicBuffer;
nativeBuffer->data =
reinterpret_cast<uint8_t*>(bufferPointer);
nativeBuffer->width = mSlots[slot].mGraphicBuffer->getWidth();
nativeBuffer->height = mSlots[slot].mGraphicBuffer->getHeight();
nativeBuffer->format = format;
nativeBuffer->flexFormat = flexFormat;
nativeBuffer->stride = (ycbcr.y != NULL) ?
static_cast<uint32_t>(ycbcr.ystride) :
mSlots[slot].mGraphicBuffer->getStride();
nativeBuffer->crop = b.mCrop;
nativeBuffer->transform = b.mTransform;
nativeBuffer->scalingMode = b.mScalingMode;
nativeBuffer->timestamp = b.mTimestamp;
nativeBuffer->dataSpace = b.mDataSpace;
nativeBuffer->frameNumber = b.mFrameNumber;
nativeBuffer->dataCb = reinterpret_cast<uint8_t*>(ycbcr.cb);
nativeBuffer->dataCr = reinterpret_cast<uint8_t*>(ycbcr.cr);
nativeBuffer->chromaStride = static_cast<uint32_t>(ycbcr.cstride);
nativeBuffer->chromaStep = static_cast<uint32_t>(ycbcr.chroma_step);
mCurrentLockedBuffers++;
return OK;
}
