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/*
* 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.
*/
#define LOG_TAG "Camera2-CallbackProcessor"
#define ATRACE_TAG ATRACE_TAG_CAMERA
//#define LOG_NDEBUG 0
#include <utils/Log.h>
#include <utils/Trace.h>
#include <gui/Surface.h>
#include "common/CameraDeviceBase.h"
#include "api1/Camera2Client.h"
#include "api1/client2/CallbackProcessor.h"
#define ALIGN(x, mask) ( ((x) + (mask) - 1) & ~((mask) - 1) )
namespace android {
namespace camera2 {
CallbackProcessor::CallbackProcessor(sp<Camera2Client> client):
Thread(false),
mClient(client),
mDevice(client->getCameraDevice()),
mId(client->getCameraId()),
mCallbackAvailable(false),
mCallbackToApp(false),
mCallbackStreamId(NO_STREAM) {
}
CallbackProcessor::~CallbackProcessor() {
ALOGV("%s: Exit", __FUNCTION__);
deleteStream();
}
void CallbackProcessor::onFrameAvailable(const BufferItem& /*item*/) {
Mutex::Autolock l(mInputMutex);
if (!mCallbackAvailable) {
mCallbackAvailable = true;
mCallbackAvailableSignal.signal();
}
}
status_t CallbackProcessor::setCallbackWindow(
sp<ANativeWindow> callbackWindow) {
ATRACE_CALL();
status_t res;
Mutex::Autolock l(mInputMutex);
sp<Camera2Client> client = mClient.promote();
if (client == 0) return OK;
sp<CameraDeviceBase> device = client->getCameraDevice();
// If the window is changing, clear out stream if it already exists
if (mCallbackWindow != callbackWindow && mCallbackStreamId != NO_STREAM) {
res = device->deleteStream(mCallbackStreamId);
if (res != OK) {
ALOGE("%s: Camera %d: Unable to delete old stream "
"for callbacks: %s (%d)", __FUNCTION__,
client->getCameraId(), strerror(-res), res);
return res;
}
mCallbackStreamId = NO_STREAM;
mCallbackConsumer.clear();
}
mCallbackWindow = callbackWindow;
mCallbackToApp = (mCallbackWindow != NULL);
return OK;
}
status_t CallbackProcessor::updateStream(const Parameters &params) {
ATRACE_CALL();
status_t res;
Mutex::Autolock l(mInputMutex);
sp<CameraDeviceBase> device = mDevice.promote();
if (device == 0) {
ALOGE("%s: Camera %d: Device does not exist", __FUNCTION__, mId);
return INVALID_OPERATION;
}
// If possible, use the flexible YUV format
int32_t callbackFormat = params.previewFormat;
if (mCallbackToApp) {
// TODO: etalvala: This should use the flexible YUV format as well, but
// need to reconcile HAL2/HAL3 requirements.
callbackFormat = HAL_PIXEL_FORMAT_YV12;
} else if(params.fastInfo.useFlexibleYuv &&
(params.previewFormat == HAL_PIXEL_FORMAT_YCrCb_420_SP ||
params.previewFormat == HAL_PIXEL_FORMAT_YV12) ) {
callbackFormat = HAL_PIXEL_FORMAT_YCbCr_420_888;
}
if (!mCallbackToApp && mCallbackConsumer == 0) {
// Create CPU buffer queue endpoint, since app hasn't given us one
// Make it async to avoid disconnect deadlocks
sp<IGraphicBufferProducer> producer;
sp<IGraphicBufferConsumer> consumer;
BufferQueue::createBufferQueue(&producer, &consumer);
mCallbackConsumer = new CpuConsumer(consumer, kCallbackHeapCount);
mCallbackConsumer->setFrameAvailableListener(this);
mCallbackConsumer->setName(String8("Camera2Client::CallbackConsumer"));
mCallbackWindow = new Surface(producer);
}
if (mCallbackStreamId != NO_STREAM) {
// Check if stream parameters have to change
uint32_t currentWidth, currentHeight, currentFormat;
res = device->getStreamInfo(mCallbackStreamId,
&currentWidth, &currentHeight, &currentFormat);
if (res != OK) {
ALOGE("%s: Camera %d: Error querying callback output stream info: "
"%s (%d)", __FUNCTION__, mId,
strerror(-res), res);
return res;
}
if (currentWidth != (uint32_t)params.previewWidth ||
currentHeight != (uint32_t)params.previewHeight ||
currentFormat != (uint32_t)callbackFormat) {
// Since size should only change while preview is not running,
// assuming that all existing use of old callback stream is
// completed.
ALOGV("%s: Camera %d: Deleting stream %d since the buffer "
"parameters changed", __FUNCTION__, mId, mCallbackStreamId);
res = device->deleteStream(mCallbackStreamId);
if (res != OK) {
ALOGE("%s: Camera %d: Unable to delete old output stream "
"for callbacks: %s (%d)", __FUNCTION__,
mId, strerror(-res), res);
return res;
}
mCallbackStreamId = NO_STREAM;
}
}
if (mCallbackStreamId == NO_STREAM) {
ALOGV("Creating callback stream: %d x %d, format 0x%x, API format 0x%x",
params.previewWidth, params.previewHeight,
callbackFormat, params.previewFormat);
res = device->createStream(mCallbackWindow,
params.previewWidth, params.previewHeight,
callbackFormat, &mCallbackStreamId);
if (res != OK) {
ALOGE("%s: Camera %d: Can't create output stream for callbacks: "
"%s (%d)", __FUNCTION__, mId,
strerror(-res), res);
return res;
}
}
return OK;
}
status_t CallbackProcessor::deleteStream() {
ATRACE_CALL();
sp<CameraDeviceBase> device;
status_t res;
{
Mutex::Autolock l(mInputMutex);
if (mCallbackStreamId == NO_STREAM) {
return OK;
}
device = mDevice.promote();
if (device == 0) {
ALOGE("%s: Camera %d: Device does not exist", __FUNCTION__, mId);
return INVALID_OPERATION;
}
}
res = device->waitUntilDrained();
if (res != OK) {
ALOGE("%s: Error waiting for HAL to drain: %s (%d)",
__FUNCTION__, strerror(-res), res);
return res;
}
res = device->deleteStream(mCallbackStreamId);
if (res != OK) {
ALOGE("%s: Unable to delete callback stream: %s (%d)",
__FUNCTION__, strerror(-res), res);
return res;
}
{
Mutex::Autolock l(mInputMutex);
mCallbackHeap.clear();
mCallbackWindow.clear();
mCallbackConsumer.clear();
mCallbackStreamId = NO_STREAM;
}
return OK;
}
int CallbackProcessor::getStreamId() const {
Mutex::Autolock l(mInputMutex);
return mCallbackStreamId;
}
void CallbackProcessor::dump(int /*fd*/, const Vector<String16>& /*args*/) const {
}
bool CallbackProcessor::threadLoop() {
status_t res;
{
Mutex::Autolock l(mInputMutex);
while (!mCallbackAvailable) {
res = mCallbackAvailableSignal.waitRelative(mInputMutex,
kWaitDuration);
if (res == TIMED_OUT) return true;
}
mCallbackAvailable = false;
}
do {
sp<Camera2Client> client = mClient.promote();
if (client == 0) {
res = discardNewCallback();
} else {
res = processNewCallback(client);
}
} while (res == OK);
return true;
}
status_t CallbackProcessor::discardNewCallback() {
ATRACE_CALL();
status_t res;
CpuConsumer::LockedBuffer imgBuffer;
res = mCallbackConsumer->lockNextBuffer(&imgBuffer);
if (res != OK) {
if (res != BAD_VALUE) {
ALOGE("%s: Camera %d: Error receiving next callback buffer: "
"%s (%d)", __FUNCTION__, mId, strerror(-res), res);
}
return res;
}
mCallbackConsumer->unlockBuffer(imgBuffer);
return OK;
}
status_t CallbackProcessor::processNewCallback(sp<Camera2Client> &client) {
ATRACE_CALL();
status_t res;
sp<Camera2Heap> callbackHeap;
bool useFlexibleYuv = false;
int32_t previewFormat = 0;
size_t heapIdx;
{
/* acquire SharedParameters before mMutex so we don't dead lock
with Camera2Client code calling into StreamingProcessor */
SharedParameters::Lock l(client->getParameters());
Mutex::Autolock m(mInputMutex);
CpuConsumer::LockedBuffer imgBuffer;
if (mCallbackStreamId == NO_STREAM) {
ALOGV("%s: Camera %d:No stream is available"
, __FUNCTION__, mId);
return INVALID_OPERATION;
}
ALOGV("%s: Getting buffer", __FUNCTION__);
res = mCallbackConsumer->lockNextBuffer(&imgBuffer);
if (res != OK) {
if (res != BAD_VALUE) {
ALOGE("%s: Camera %d: Error receiving next callback buffer: "
"%s (%d)", __FUNCTION__, mId, strerror(-res), res);
}
return res;
}
ALOGV("%s: Camera %d: Preview callback available", __FUNCTION__,
mId);
if ( l.mParameters.state != Parameters::PREVIEW
&& l.mParameters.state != Parameters::RECORD
&& l.mParameters.state != Parameters::VIDEO_SNAPSHOT) {
ALOGV("%s: Camera %d: No longer streaming",
__FUNCTION__, mId);
mCallbackConsumer->unlockBuffer(imgBuffer);
return OK;
}
if (! (l.mParameters.previewCallbackFlags &
CAMERA_FRAME_CALLBACK_FLAG_ENABLE_MASK) ) {
ALOGV("%s: No longer enabled, dropping", __FUNCTION__);
mCallbackConsumer->unlockBuffer(imgBuffer);
return OK;
}
if ((l.mParameters.previewCallbackFlags &
CAMERA_FRAME_CALLBACK_FLAG_ONE_SHOT_MASK) &&
!l.mParameters.previewCallbackOneShot) {
ALOGV("%s: One shot mode, already sent, dropping", __FUNCTION__);
mCallbackConsumer->unlockBuffer(imgBuffer);
return OK;
}
if (imgBuffer.width != static_cast<uint32_t>(l.mParameters.previewWidth) ||
imgBuffer.height != static_cast<uint32_t>(l.mParameters.previewHeight)) {
ALOGW("%s: The preview size has changed to %d x %d from %d x %d, this buffer is"
" no longer valid, dropping",__FUNCTION__,
l.mParameters.previewWidth, l.mParameters.previewHeight,
imgBuffer.width, imgBuffer.height);
mCallbackConsumer->unlockBuffer(imgBuffer);
return OK;
}
previewFormat = l.mParameters.previewFormat;
useFlexibleYuv = l.mParameters.fastInfo.useFlexibleYuv &&
(previewFormat == HAL_PIXEL_FORMAT_YCrCb_420_SP ||
previewFormat == HAL_PIXEL_FORMAT_YV12);
int32_t expectedFormat = useFlexibleYuv ?
HAL_PIXEL_FORMAT_YCbCr_420_888 : previewFormat;
if (imgBuffer.format != expectedFormat) {
ALOGE("%s: Camera %d: Unexpected format for callback: "
"0x%x, expected 0x%x", __FUNCTION__, mId,
imgBuffer.format, expectedFormat);
mCallbackConsumer->unlockBuffer(imgBuffer);
return INVALID_OPERATION;
}
// In one-shot mode, stop sending callbacks after the first one
if (l.mParameters.previewCallbackFlags &
CAMERA_FRAME_CALLBACK_FLAG_ONE_SHOT_MASK) {
ALOGV("%s: clearing oneshot", __FUNCTION__);
l.mParameters.previewCallbackOneShot = false;
}
uint32_t destYStride = 0;
uint32_t destCStride = 0;
if (useFlexibleYuv) {
if (previewFormat == HAL_PIXEL_FORMAT_YV12) {
// Strides must align to 16 for YV12
destYStride = ALIGN(imgBuffer.width, 16);
destCStride = ALIGN(destYStride / 2, 16);
} else {
// No padding for NV21
ALOG_ASSERT(previewFormat == HAL_PIXEL_FORMAT_YCrCb_420_SP,
"Unexpected preview format 0x%x", previewFormat);
destYStride = imgBuffer.width;
destCStride = destYStride / 2;
}
} else {
destYStride = imgBuffer.stride;
// don't care about cStride
}
size_t bufferSize = Camera2Client::calculateBufferSize(
imgBuffer.width, imgBuffer.height,
previewFormat, destYStride);
size_t currentBufferSize = (mCallbackHeap == 0) ?
0 : (mCallbackHeap->mHeap->getSize() / kCallbackHeapCount);
if (bufferSize != currentBufferSize) {
mCallbackHeap.clear();
mCallbackHeap = new Camera2Heap(bufferSize, kCallbackHeapCount,
"Camera2Client::CallbackHeap");
if (mCallbackHeap->mHeap->getSize() == 0) {
ALOGE("%s: Camera %d: Unable to allocate memory for callbacks",
__FUNCTION__, mId);
mCallbackConsumer->unlockBuffer(imgBuffer);
return INVALID_OPERATION;
}
mCallbackHeapHead = 0;
mCallbackHeapFree = kCallbackHeapCount;
}
if (mCallbackHeapFree == 0) {
ALOGE("%s: Camera %d: No free callback buffers, dropping frame",
__FUNCTION__, mId);
mCallbackConsumer->unlockBuffer(imgBuffer);
return OK;
}
heapIdx = mCallbackHeapHead;
mCallbackHeapHead = (mCallbackHeapHead + 1) & kCallbackHeapCount;
mCallbackHeapFree--;
// TODO: Get rid of this copy by passing the gralloc queue all the way
// to app
ssize_t offset;
size_t size;
sp<IMemoryHeap> heap =
mCallbackHeap->mBuffers[heapIdx]->getMemory(&offset,
&size);
uint8_t *data = (uint8_t*)heap->getBase() + offset;
if (!useFlexibleYuv) {
// Can just memcpy when HAL format matches API format
memcpy(data, imgBuffer.data, bufferSize);
} else {
res = convertFromFlexibleYuv(previewFormat, data, imgBuffer,
destYStride, destCStride);
if (res != OK) {
ALOGE("%s: Camera %d: Can't convert between 0x%x and 0x%x formats!",
__FUNCTION__, mId, imgBuffer.format, previewFormat);
mCallbackConsumer->unlockBuffer(imgBuffer);
return BAD_VALUE;
}
}
ALOGV("%s: Freeing buffer", __FUNCTION__);
mCallbackConsumer->unlockBuffer(imgBuffer);
// mCallbackHeap may get freed up once input mutex is released
callbackHeap = mCallbackHeap;
}
// Call outside parameter lock to allow re-entrancy from notification
{
Camera2Client::SharedCameraCallbacks::Lock
l(client->mSharedCameraCallbacks);
if (l.mRemoteCallback != 0) {
ALOGV("%s: Camera %d: Invoking client data callback",
__FUNCTION__, mId);
l.mRemoteCallback->dataCallback(CAMERA_MSG_PREVIEW_FRAME,
callbackHeap->mBuffers[heapIdx], NULL);
}
}
// Only increment free if we're still using the same heap
mCallbackHeapFree++;
ALOGV("%s: exit", __FUNCTION__);
return OK;
}
status_t CallbackProcessor::convertFromFlexibleYuv(int32_t previewFormat,
uint8_t *dst,
const CpuConsumer::LockedBuffer &src,
uint32_t dstYStride,
uint32_t dstCStride) const {
if (previewFormat != HAL_PIXEL_FORMAT_YCrCb_420_SP &&
previewFormat != HAL_PIXEL_FORMAT_YV12) {
ALOGE("%s: Camera %d: Unexpected preview format when using "
"flexible YUV: 0x%x", __FUNCTION__, mId, previewFormat);
return INVALID_OPERATION;
}
// Copy Y plane, adjusting for stride
const uint8_t *ySrc = src.data;
uint8_t *yDst = dst;
for (size_t row = 0; row < src.height; row++) {
memcpy(yDst, ySrc, src.width);
ySrc += src.stride;
yDst += dstYStride;
}
// Copy/swizzle chroma planes, 4:2:0 subsampling
const uint8_t *cbSrc = src.dataCb;
const uint8_t *crSrc = src.dataCr;
size_t chromaHeight = src.height / 2;
size_t chromaWidth = src.width / 2;
ssize_t chromaGap = src.chromaStride -
(chromaWidth * src.chromaStep);
size_t dstChromaGap = dstCStride - chromaWidth;
if (previewFormat == HAL_PIXEL_FORMAT_YCrCb_420_SP) {
// Flexible YUV chroma to NV21 chroma
uint8_t *crcbDst = yDst;
// Check for shortcuts
if (cbSrc == crSrc + 1 && src.chromaStep == 2) {
ALOGV("%s: Fast NV21->NV21", __FUNCTION__);
// Source has semiplanar CrCb chroma layout, can copy by rows
for (size_t row = 0; row < chromaHeight; row++) {
memcpy(crcbDst, crSrc, src.width);
crcbDst += src.width;
crSrc += src.chromaStride;
}
} else {
ALOGV("%s: Generic->NV21", __FUNCTION__);
// Generic copy, always works but not very efficient
for (size_t row = 0; row < chromaHeight; row++) {
for (size_t col = 0; col < chromaWidth; col++) {
*(crcbDst++) = *crSrc;
*(crcbDst++) = *cbSrc;
crSrc += src.chromaStep;
cbSrc += src.chromaStep;
}
crSrc += chromaGap;
cbSrc += chromaGap;
}
}
} else {
// flexible YUV chroma to YV12 chroma
ALOG_ASSERT(previewFormat == HAL_PIXEL_FORMAT_YV12,
"Unexpected preview format 0x%x", previewFormat);
uint8_t *crDst = yDst;
uint8_t *cbDst = yDst + chromaHeight * dstCStride;
if (src.chromaStep == 1) {
ALOGV("%s: Fast YV12->YV12", __FUNCTION__);
// Source has planar chroma layout, can copy by row
for (size_t row = 0; row < chromaHeight; row++) {
memcpy(crDst, crSrc, chromaWidth);
crDst += dstCStride;
crSrc += src.chromaStride;
}
for (size_t row = 0; row < chromaHeight; row++) {
memcpy(cbDst, cbSrc, chromaWidth);
cbDst += dstCStride;
cbSrc += src.chromaStride;
}
} else {
ALOGV("%s: Generic->YV12", __FUNCTION__);
// Generic copy, always works but not very efficient
for (size_t row = 0; row < chromaHeight; row++) {
for (size_t col = 0; col < chromaWidth; col++) {
*(crDst++) = *crSrc;
*(cbDst++) = *cbSrc;
crSrc += src.chromaStep;
cbSrc += src.chromaStep;
}
crSrc += chromaGap;
cbSrc += chromaGap;
crDst += dstChromaGap;
cbDst += dstChromaGap;
}
}
}
return OK;
}
}; // namespace camera2
}; // namespace android