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/*
* Copyright 2016 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_NDEBUG 0
#define LOG_TAG "Camera3-BufferManager"
#define ATRACE_TAG ATRACE_TAG_CAMERA
#include <gui/ISurfaceComposer.h>
#include <private/gui/ComposerService.h>
#include <utils/Log.h>
#include <utils/Trace.h>
#include "utils/CameraTraces.h"
#include "Camera3BufferManager.h"
namespace android {
namespace camera3 {
Camera3BufferManager::Camera3BufferManager() {
}
Camera3BufferManager::~Camera3BufferManager() {
}
status_t Camera3BufferManager::registerStream(wp<Camera3OutputStream>& stream,
const StreamInfo& streamInfo) {
ATRACE_CALL();
int streamId = streamInfo.streamId;
StreamSetKey streamSetKey = {streamInfo.streamSetId, streamInfo.isMultiRes};
if (streamId == CAMERA3_STREAM_ID_INVALID ||
streamSetKey.id == CAMERA3_STREAM_SET_ID_INVALID) {
ALOGE("%s: Stream id (%d) or stream set id (%d) is invalid",
__FUNCTION__, streamId, streamSetKey.id);
return BAD_VALUE;
}
if (streamInfo.totalBufferCount > kMaxBufferCount || streamInfo.totalBufferCount == 0) {
ALOGE("%s: Stream id (%d) with stream set id (%d) total buffer count %zu is invalid",
__FUNCTION__, streamId, streamSetKey.id, streamInfo.totalBufferCount);
return BAD_VALUE;
}
if (!streamInfo.isConfigured) {
ALOGE("%s: Stream (%d) is not configured", __FUNCTION__, streamId);
return BAD_VALUE;
}
// For Gralloc v1, try to allocate a buffer and see if it is successful, otherwise, stream
// buffer sharing for this newly added stream is not supported. For Gralloc v0, we don't
// need check this, as the buffers are not really shared between streams, the buffers are
// allocated for each stream individually, the allocation failure will be checked in
// getBufferForStream() call.
if (mGrallocVersion > HARDWARE_DEVICE_API_VERSION(0,1)) {
// TODO: To be implemented.
// In case allocation fails, return invalid operation
return INVALID_OPERATION;
}
Mutex::Autolock l(mLock);
// Check if this stream was registered with different stream set ID, if so, error out.
for (size_t i = 0; i < mStreamSetMap.size(); i++) {
ssize_t streamIdx = mStreamSetMap[i].streamInfoMap.indexOfKey(streamId);
if (streamIdx != NAME_NOT_FOUND &&
mStreamSetMap[i].streamInfoMap[streamIdx].streamSetId != streamInfo.streamSetId &&
mStreamSetMap[i].streamInfoMap[streamIdx].isMultiRes != streamInfo.isMultiRes) {
ALOGE("%s: It is illegal to register the same stream id with different stream set",
__FUNCTION__);
return BAD_VALUE;
}
}
// Check if there is an existing stream set registered; if not, create one; otherwise, add this
// stream info to the existing stream set entry.
ssize_t setIdx = mStreamSetMap.indexOfKey(streamSetKey);
if (setIdx == NAME_NOT_FOUND) {
ALOGV("%s: stream set %d(%d) is not registered to stream set map yet, create it.",
__FUNCTION__, streamSetKey.id, streamSetKey.isMultiRes);
// Create stream info map, then add to mStreamsetMap.
StreamSet newStreamSet;
setIdx = mStreamSetMap.add(streamSetKey, newStreamSet);
}
// Update stream set map and water mark.
StreamSet& currentStreamSet = mStreamSetMap.editValueAt(setIdx);
ssize_t streamIdx = currentStreamSet.streamInfoMap.indexOfKey(streamId);
if (streamIdx != NAME_NOT_FOUND) {
ALOGW("%s: stream %d was already registered with stream set %d(%d)",
__FUNCTION__, streamId, streamSetKey.id, streamSetKey.isMultiRes);
return OK;
}
currentStreamSet.streamInfoMap.add(streamId, streamInfo);
currentStreamSet.handoutBufferCountMap.add(streamId, 0);
currentStreamSet.attachedBufferCountMap.add(streamId, 0);
mStreamMap.add(streamId, stream);
// The max allowed buffer count should be the max of buffer count of each stream inside a stream
// set.
if (streamInfo.totalBufferCount > currentStreamSet.maxAllowedBufferCount) {
currentStreamSet.maxAllowedBufferCount = streamInfo.totalBufferCount;
}
return OK;
}
status_t Camera3BufferManager::unregisterStream(int streamId, int streamSetId, bool isMultiRes) {
ATRACE_CALL();
Mutex::Autolock l(mLock);
ALOGV("%s: unregister stream %d with stream set %d(%d)", __FUNCTION__,
streamId, streamSetId, isMultiRes);
StreamSetKey streamSetKey = {streamSetId, isMultiRes};
if (!checkIfStreamRegisteredLocked(streamId, streamSetKey)){
ALOGE("%s: stream %d with set %d(%d) wasn't properly registered to this"
" buffer manager!", __FUNCTION__, streamId, streamSetId, isMultiRes);
return BAD_VALUE;
}
// De-list all the buffers associated with this stream first.
StreamSet& currentSet = mStreamSetMap.editValueFor(streamSetKey);
BufferCountMap& handOutBufferCounts = currentSet.handoutBufferCountMap;
BufferCountMap& attachedBufferCounts = currentSet.attachedBufferCountMap;
InfoMap& infoMap = currentSet.streamInfoMap;
handOutBufferCounts.removeItem(streamId);
attachedBufferCounts.removeItem(streamId);
// Remove the stream info from info map and recalculate the buffer count water mark.
infoMap.removeItem(streamId);
currentSet.maxAllowedBufferCount = 0;
for (size_t i = 0; i < infoMap.size(); i++) {
if (infoMap[i].totalBufferCount > currentSet.maxAllowedBufferCount) {
currentSet.maxAllowedBufferCount = infoMap[i].totalBufferCount;
}
}
mStreamMap.removeItem(streamId);
// Lazy solution: when a stream is unregistered, the streams will be reconfigured, reset
// the water mark and let it grow again.
currentSet.allocatedBufferWaterMark = 0;
// Remove this stream set if all its streams have been removed.
if (handOutBufferCounts.size() == 0 && infoMap.size() == 0) {
mStreamSetMap.removeItem(streamSetKey);
}
return OK;
}
void Camera3BufferManager::notifyBufferRemoved(int streamId, int streamSetId, bool isMultiRes) {
Mutex::Autolock l(mLock);
StreamSetKey streamSetKey = {streamSetId, isMultiRes};
StreamSet &streamSet = mStreamSetMap.editValueFor(streamSetKey);
size_t& attachedBufferCount =
streamSet.attachedBufferCountMap.editValueFor(streamId);
attachedBufferCount--;
}
status_t Camera3BufferManager::checkAndFreeBufferOnOtherStreamsLocked(
int streamId, StreamSetKey streamSetKey) {
StreamId firstOtherStreamId = CAMERA3_STREAM_ID_INVALID;
StreamSet &streamSet = mStreamSetMap.editValueFor(streamSetKey);
if (streamSet.streamInfoMap.size() == 1) {
ALOGV("StreamSet %d(%d) has no other stream available to free",
streamSetKey.id, streamSetKey.isMultiRes);
return OK;
}
bool freeBufferIsAttached = false;
for (size_t i = 0; i < streamSet.streamInfoMap.size(); i++) {
firstOtherStreamId = streamSet.streamInfoMap[i].streamId;
if (firstOtherStreamId != streamId) {
size_t otherBufferCount =
streamSet.handoutBufferCountMap.valueFor(firstOtherStreamId);
size_t otherAttachedBufferCount =
streamSet.attachedBufferCountMap.valueFor(firstOtherStreamId);
if (otherAttachedBufferCount > otherBufferCount) {
freeBufferIsAttached = true;
break;
}
}
firstOtherStreamId = CAMERA3_STREAM_ID_INVALID;
}
if (firstOtherStreamId == CAMERA3_STREAM_ID_INVALID || !freeBufferIsAttached) {
ALOGV("StreamSet %d(%d) has no buffer available to free",
streamSetKey.id, streamSetKey.isMultiRes);
return OK;
}
// This will drop the reference to one free buffer, which will effectively free one
// buffer (from the free buffer list) for the inactive streams.
size_t totalAllocatedBufferCount = 0;
for (size_t i = 0; i < streamSet.attachedBufferCountMap.size(); i++) {
totalAllocatedBufferCount += streamSet.attachedBufferCountMap[i];
}
if (totalAllocatedBufferCount > streamSet.allocatedBufferWaterMark) {
ALOGV("Stream %d: Freeing buffer: detach", firstOtherStreamId);
sp<Camera3OutputStream> stream =
mStreamMap.valueFor(firstOtherStreamId).promote();
if (stream == nullptr) {
ALOGE("%s: unable to promote stream %d to detach buffer", __FUNCTION__,
firstOtherStreamId);
return INVALID_OPERATION;
}
// Detach and then drop the buffer.
//
// Need to unlock because the stream may also be calling
// into the buffer manager in parallel to signal buffer
// release, or acquire a new buffer.
bool bufferFreed = false;
{
mLock.unlock();
sp<GraphicBuffer> buffer;
stream->detachBuffer(&buffer, /*fenceFd*/ nullptr);
mLock.lock();
if (buffer.get() != nullptr) {
bufferFreed = true;
}
}
if (bufferFreed) {
size_t& otherAttachedBufferCount =
streamSet.attachedBufferCountMap.editValueFor(firstOtherStreamId);
otherAttachedBufferCount--;
}
}
return OK;
}
status_t Camera3BufferManager::getBufferForStream(int streamId, int streamSetId,
bool isMultiRes, sp<GraphicBuffer>* gb, int* fenceFd, bool noFreeBufferAtConsumer) {
ATRACE_CALL();
Mutex::Autolock l(mLock);
ALOGV("%s: get buffer for stream %d with stream set %d(%d)", __FUNCTION__,
streamId, streamSetId, isMultiRes);
StreamSetKey streamSetKey = {streamSetId, isMultiRes};
if (!checkIfStreamRegisteredLocked(streamId, streamSetKey)) {
ALOGE("%s: stream %d is not registered with stream set %d(%d) yet!!!",
__FUNCTION__, streamId, streamSetId, isMultiRes);
return BAD_VALUE;
}
StreamSet &streamSet = mStreamSetMap.editValueFor(streamSetKey);
BufferCountMap& handOutBufferCounts = streamSet.handoutBufferCountMap;
size_t& bufferCount = handOutBufferCounts.editValueFor(streamId);
BufferCountMap& attachedBufferCounts = streamSet.attachedBufferCountMap;
size_t& attachedBufferCount = attachedBufferCounts.editValueFor(streamId);
if (noFreeBufferAtConsumer) {
attachedBufferCount = bufferCount;
}
if (bufferCount >= streamSet.maxAllowedBufferCount) {
ALOGE("%s: bufferCount (%zu) exceeds the max allowed buffer count (%zu) of this stream set",
__FUNCTION__, bufferCount, streamSet.maxAllowedBufferCount);
return INVALID_OPERATION;
}
if (attachedBufferCount > bufferCount) {
// We've already attached more buffers to this stream than we currently have
// outstanding, so have the stream just use an already-attached buffer
bufferCount++;
return ALREADY_EXISTS;
}
ALOGV("Stream %d set %d(%d): Get buffer for stream: Allocate new",
streamId, streamSetId, isMultiRes);
if (mGrallocVersion < HARDWARE_DEVICE_API_VERSION(1,0)) {
const StreamInfo& info = streamSet.streamInfoMap.valueFor(streamId);
GraphicBufferEntry buffer;
buffer.fenceFd = -1;
buffer.graphicBuffer = new GraphicBuffer(
info.width, info.height, PixelFormat(info.format), info.combinedUsage,
std::string("Camera3BufferManager pid [") +
std::to_string(getpid()) + "]");
status_t res = buffer.graphicBuffer->initCheck();
ALOGV("%s: allocating a new graphic buffer (%dx%d, format 0x%x) %p with handle %p",
__FUNCTION__, info.width, info.height, info.format,
buffer.graphicBuffer.get(), buffer.graphicBuffer->handle);
if (res < 0) {
ALOGE("%s: graphic buffer allocation failed: (error %d %s) ",
__FUNCTION__, res, strerror(-res));
return res;
}
ALOGV("%s: allocation done", __FUNCTION__);
// Increase the hand-out and attached buffer counts for tracking purposes.
bufferCount++;
attachedBufferCount++;
// Update the water mark to be the max hand-out buffer count + 1. An additional buffer is
// added to reduce the chance of buffer allocation during stream steady state, especially
// for cases where one stream is active, the other stream may request some buffers randomly.
if (bufferCount + 1 > streamSet.allocatedBufferWaterMark) {
streamSet.allocatedBufferWaterMark = bufferCount + 1;
}
*gb = buffer.graphicBuffer;
*fenceFd = buffer.fenceFd;
ALOGV("%s: get buffer (%p) with handle (%p).",
__FUNCTION__, buffer.graphicBuffer.get(), buffer.graphicBuffer->handle);
// Proactively free buffers for other streams if the current number of allocated buffers
// exceeds the water mark. This only for Gralloc V1, for V2, this logic can also be handled
// in returnBufferForStream() if we want to free buffer more quickly.
// TODO: probably should find out all the inactive stream IDs, and free the firstly found
// buffers for them.
res = checkAndFreeBufferOnOtherStreamsLocked(streamId, streamSetKey);
if (res != OK) {
return res;
}
// Since we just allocated one new buffer above, try free one more buffer from other streams
// to prevent total buffer count from growing
res = checkAndFreeBufferOnOtherStreamsLocked(streamId, streamSetKey);
if (res != OK) {
return res;
}
} else {
// TODO: implement this.
return BAD_VALUE;
}
return OK;
}
status_t Camera3BufferManager::onBufferReleased(
int streamId, int streamSetId, bool isMultiRes, bool* shouldFreeBuffer) {
ATRACE_CALL();
if (shouldFreeBuffer == nullptr) {
ALOGE("%s: shouldFreeBuffer is null", __FUNCTION__);
return BAD_VALUE;
}
Mutex::Autolock l(mLock);
ALOGV("Stream %d set %d(%d): Buffer released", streamId, streamSetId, isMultiRes);
*shouldFreeBuffer = false;
StreamSetKey streamSetKey = {streamSetId, isMultiRes};
if (!checkIfStreamRegisteredLocked(streamId, streamSetKey)){
ALOGV("%s: signaling buffer release for an already unregistered stream "
"(stream %d with set id %d(%d))", __FUNCTION__, streamId, streamSetId,
isMultiRes);
return OK;
}
if (mGrallocVersion < HARDWARE_DEVICE_API_VERSION(1,0)) {
StreamSet& streamSet = mStreamSetMap.editValueFor(streamSetKey);
BufferCountMap& handOutBufferCounts = streamSet.handoutBufferCountMap;
size_t& bufferCount = handOutBufferCounts.editValueFor(streamId);
bufferCount--;
ALOGV("%s: Stream %d set %d(%d): Buffer count now %zu", __FUNCTION__, streamId,
streamSetId, isMultiRes, bufferCount);
size_t totalAllocatedBufferCount = 0;
size_t totalHandOutBufferCount = 0;
for (size_t i = 0; i < streamSet.attachedBufferCountMap.size(); i++) {
totalAllocatedBufferCount += streamSet.attachedBufferCountMap[i];
totalHandOutBufferCount += streamSet.handoutBufferCountMap[i];
}
size_t newWaterMark = totalHandOutBufferCount + BUFFER_WATERMARK_DEC_THRESHOLD;
if (totalAllocatedBufferCount > newWaterMark &&
streamSet.allocatedBufferWaterMark > newWaterMark) {
// BufferManager got more than enough buffers, so decrease watermark
// to trigger more buffers free operation.
streamSet.allocatedBufferWaterMark = newWaterMark;
ALOGV("%s: Stream %d set %d(%d): watermark--; now %zu",
__FUNCTION__, streamId, streamSetId, isMultiRes,
streamSet.allocatedBufferWaterMark);
}
size_t attachedBufferCount = streamSet.attachedBufferCountMap.valueFor(streamId);
if (attachedBufferCount <= bufferCount) {
ALOGV("%s: stream %d has no buffer available to free.", __FUNCTION__, streamId);
}
bool freeBufferIsAttached = (attachedBufferCount > bufferCount);
if (freeBufferIsAttached &&
totalAllocatedBufferCount > streamSet.allocatedBufferWaterMark &&
attachedBufferCount > bufferCount + BUFFER_FREE_THRESHOLD) {
ALOGV("%s: free a buffer from stream %d", __FUNCTION__, streamId);
*shouldFreeBuffer = true;
}
} else {
// TODO: implement gralloc V1 support
return BAD_VALUE;
}
return OK;
}
status_t Camera3BufferManager::onBuffersRemoved(int streamId, int streamSetId,
bool isMultiRes, size_t count) {
ATRACE_CALL();
Mutex::Autolock l(mLock);
ALOGV("Stream %d set %d(%d): Buffer removed", streamId, streamSetId, isMultiRes);
StreamSetKey streamSetKey = {streamSetId, isMultiRes};
if (!checkIfStreamRegisteredLocked(streamId, streamSetKey)){
ALOGV("%s: signaling buffer removal for an already unregistered stream "
"(stream %d with set id %d(%d))", __FUNCTION__, streamId, streamSetId, isMultiRes);
return OK;
}
if (mGrallocVersion < HARDWARE_DEVICE_API_VERSION(1,0)) {
StreamSet& streamSet = mStreamSetMap.editValueFor(streamSetKey);
BufferCountMap& handOutBufferCounts = streamSet.handoutBufferCountMap;
size_t& totalHandoutCount = handOutBufferCounts.editValueFor(streamId);
BufferCountMap& attachedBufferCounts = streamSet.attachedBufferCountMap;
size_t& totalAttachedCount = attachedBufferCounts.editValueFor(streamId);
if (count > totalHandoutCount) {
ALOGE("%s: Removed buffer count %zu greater than current handout count %zu",
__FUNCTION__, count, totalHandoutCount);
return BAD_VALUE;
}
if (count > totalAttachedCount) {
ALOGE("%s: Removed buffer count %zu greater than current attached count %zu",
__FUNCTION__, count, totalAttachedCount);
return BAD_VALUE;
}
totalHandoutCount -= count;
totalAttachedCount -= count;
ALOGV("%s: Stream %d set %d(%d): Buffer count now %zu, attached buffer count now %zu",
__FUNCTION__, streamId, streamSetId, isMultiRes, totalHandoutCount,
totalAttachedCount);
} else {
// TODO: implement gralloc V1 support
return BAD_VALUE;
}
return OK;
}
void Camera3BufferManager::dump(int fd, const Vector<String16>& args) const {
Mutex::Autolock l(mLock);
(void) args;
String8 lines;
lines.appendFormat(" Total stream sets: %zu\n", mStreamSetMap.size());
for (size_t i = 0; i < mStreamSetMap.size(); i++) {
lines.appendFormat(" Stream set %d(%d) has below streams:\n",
mStreamSetMap.keyAt(i).id, mStreamSetMap.keyAt(i).isMultiRes);
for (size_t j = 0; j < mStreamSetMap[i].streamInfoMap.size(); j++) {
lines.appendFormat(" Stream %d\n", mStreamSetMap[i].streamInfoMap[j].streamId);
}
lines.appendFormat(" Stream set max allowed buffer count: %zu\n",
mStreamSetMap[i].maxAllowedBufferCount);
lines.appendFormat(" Stream set buffer count water mark: %zu\n",
mStreamSetMap[i].allocatedBufferWaterMark);
lines.appendFormat(" Handout buffer counts:\n");
for (size_t m = 0; m < mStreamSetMap[i].handoutBufferCountMap.size(); m++) {
int streamId = mStreamSetMap[i].handoutBufferCountMap.keyAt(m);
size_t bufferCount = mStreamSetMap[i].handoutBufferCountMap.valueAt(m);
lines.appendFormat(" stream id: %d, buffer count: %zu.\n",
streamId, bufferCount);
}
lines.appendFormat(" Attached buffer counts:\n");
for (size_t m = 0; m < mStreamSetMap[i].attachedBufferCountMap.size(); m++) {
int streamId = mStreamSetMap[i].attachedBufferCountMap.keyAt(m);
size_t bufferCount = mStreamSetMap[i].attachedBufferCountMap.valueAt(m);
lines.appendFormat(" stream id: %d, attached buffer count: %zu.\n",
streamId, bufferCount);
}
}
write(fd, lines.string(), lines.size());
}
bool Camera3BufferManager::checkIfStreamRegisteredLocked(int streamId,
StreamSetKey streamSetKey) const {
ssize_t setIdx = mStreamSetMap.indexOfKey(streamSetKey);
if (setIdx == NAME_NOT_FOUND) {
ALOGV("%s: stream set %d(%d) is not registered to stream set map yet!",
__FUNCTION__, streamSetKey.id, streamSetKey.isMultiRes);
return false;
}
ssize_t streamIdx = mStreamSetMap.valueAt(setIdx).streamInfoMap.indexOfKey(streamId);
if (streamIdx == NAME_NOT_FOUND) {
ALOGV("%s: stream %d is not registered to stream info map yet!", __FUNCTION__, streamId);
return false;
}
size_t bufferWaterMark = mStreamSetMap[setIdx].maxAllowedBufferCount;
if (bufferWaterMark == 0 || bufferWaterMark > kMaxBufferCount) {
ALOGW("%s: stream %d with stream set %d(%d) is not registered correctly to stream set map,"
" as the water mark (%zu) is wrong!",
__FUNCTION__, streamId, streamSetKey.id, streamSetKey.isMultiRes,
bufferWaterMark);
return false;
}
return true;
}
} // namespace camera3
} // namespace android