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      1 /*
      2  * Copyright (C) 2013 The Android Open Source Project
      3  *
      4  * Licensed under the Apache License, Version 2.0 (the "License");
      5  * you may not use this file except in compliance with the License.
      6  * You may obtain a copy of the License at
      7  *
      8  *      http://www.apache.org/licenses/LICENSE-2.0
      9  *
     10  * Unless required by applicable law or agreed to in writing, software
     11  * distributed under the License is distributed on an "AS IS" BASIS,
     12  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
     13  * See the License for the specific language governing permissions and
     14  * limitations under the License.
     15  */
     16 
     17 #define LOG_TAG "Camera3-IOStreamBase"
     18 #define ATRACE_TAG ATRACE_TAG_CAMERA
     19 //#define LOG_NDEBUG 0
     20 
     21 // This is needed for stdint.h to define INT64_MAX in C++
     22 #define __STDC_LIMIT_MACROS
     23 
     24 #include <utils/Log.h>
     25 #include <utils/Trace.h>
     26 #include "device3/Camera3IOStreamBase.h"
     27 #include "device3/StatusTracker.h"
     28 
     29 namespace android {
     30 
     31 namespace camera3 {
     32 
     33 Camera3IOStreamBase::Camera3IOStreamBase(int id, camera3_stream_type_t type,
     34         uint32_t width, uint32_t height, size_t maxSize, int format) :
     35         Camera3Stream(id, type,
     36                 width, height, maxSize, format),
     37         mTotalBufferCount(0),
     38         mDequeuedBufferCount(0),
     39         mFrameCount(0),
     40         mLastTimestamp(0) {
     41 
     42     mCombinedFence = new Fence();
     43 
     44     if (maxSize > 0 && format != HAL_PIXEL_FORMAT_BLOB) {
     45         ALOGE("%s: Bad format for size-only stream: %d", __FUNCTION__,
     46                 format);
     47         mState = STATE_ERROR;
     48     }
     49 }
     50 
     51 Camera3IOStreamBase::~Camera3IOStreamBase() {
     52     disconnectLocked();
     53 }
     54 
     55 bool Camera3IOStreamBase::hasOutstandingBuffersLocked() const {
     56     nsecs_t signalTime = mCombinedFence->getSignalTime();
     57     ALOGV("%s: Stream %d: Has %d outstanding buffers,"
     58             " buffer signal time is %lld",
     59             __FUNCTION__, mId, mDequeuedBufferCount, signalTime);
     60     if (mDequeuedBufferCount > 0 || signalTime == INT64_MAX) {
     61         return true;
     62     }
     63     return false;
     64 }
     65 
     66 void Camera3IOStreamBase::dump(int fd, const Vector<String16> &args) const {
     67     (void) args;
     68     String8 lines;
     69     lines.appendFormat("      State: %d\n", mState);
     70     lines.appendFormat("      Dims: %d x %d, format 0x%x\n",
     71             camera3_stream::width, camera3_stream::height,
     72             camera3_stream::format);
     73     lines.appendFormat("      Max size: %d\n", mMaxSize);
     74     lines.appendFormat("      Usage: %d, max HAL buffers: %d\n",
     75             camera3_stream::usage, camera3_stream::max_buffers);
     76     lines.appendFormat("      Frames produced: %d, last timestamp: %lld ns\n",
     77             mFrameCount, mLastTimestamp);
     78     lines.appendFormat("      Total buffers: %d, currently dequeued: %d\n",
     79             mTotalBufferCount, mDequeuedBufferCount);
     80     write(fd, lines.string(), lines.size());
     81 }
     82 
     83 status_t Camera3IOStreamBase::configureQueueLocked() {
     84     status_t res;
     85 
     86     switch (mState) {
     87         case STATE_IN_RECONFIG:
     88             res = disconnectLocked();
     89             if (res != OK) {
     90                 return res;
     91             }
     92             break;
     93         case STATE_IN_CONFIG:
     94             // OK
     95             break;
     96         default:
     97             ALOGE("%s: Bad state: %d", __FUNCTION__, mState);
     98             return INVALID_OPERATION;
     99     }
    100 
    101     return OK;
    102 }
    103 
    104 size_t Camera3IOStreamBase::getBufferCountLocked() {
    105     return mTotalBufferCount;
    106 }
    107 
    108 status_t Camera3IOStreamBase::disconnectLocked() {
    109     switch (mState) {
    110         case STATE_IN_RECONFIG:
    111         case STATE_CONFIGURED:
    112             // OK
    113             break;
    114         default:
    115             // No connection, nothing to do
    116             ALOGV("%s: Stream %d: Already disconnected",
    117                   __FUNCTION__, mId);
    118             return -ENOTCONN;
    119     }
    120 
    121     if (mDequeuedBufferCount > 0) {
    122         ALOGE("%s: Can't disconnect with %d buffers still dequeued!",
    123                 __FUNCTION__, mDequeuedBufferCount);
    124         return INVALID_OPERATION;
    125     }
    126 
    127    return OK;
    128 }
    129 
    130 void Camera3IOStreamBase::handoutBufferLocked(camera3_stream_buffer &buffer,
    131                                               buffer_handle_t *handle,
    132                                               int acquireFence,
    133                                               int releaseFence,
    134                                               camera3_buffer_status_t status) {
    135     /**
    136      * Note that all fences are now owned by HAL.
    137      */
    138 
    139     // Handing out a raw pointer to this object. Increment internal refcount.
    140     incStrong(this);
    141     buffer.stream = this;
    142     buffer.buffer = handle;
    143     buffer.acquire_fence = acquireFence;
    144     buffer.release_fence = releaseFence;
    145     buffer.status = status;
    146 
    147     // Inform tracker about becoming busy
    148     if (mDequeuedBufferCount == 0 && mState != STATE_IN_CONFIG &&
    149             mState != STATE_IN_RECONFIG) {
    150         sp<StatusTracker> statusTracker = mStatusTracker.promote();
    151         if (statusTracker != 0) {
    152             statusTracker->markComponentActive(mStatusId);
    153         }
    154     }
    155     mDequeuedBufferCount++;
    156 }
    157 
    158 status_t Camera3IOStreamBase::getBufferPreconditionCheckLocked() const {
    159     // Allow dequeue during IN_[RE]CONFIG for registration
    160     if (mState != STATE_CONFIGURED &&
    161             mState != STATE_IN_CONFIG && mState != STATE_IN_RECONFIG) {
    162         ALOGE("%s: Stream %d: Can't get buffers in unconfigured state %d",
    163                 __FUNCTION__, mId, mState);
    164         return INVALID_OPERATION;
    165     }
    166 
    167     // Only limit dequeue amount when fully configured
    168     if (mState == STATE_CONFIGURED &&
    169             mDequeuedBufferCount == camera3_stream::max_buffers) {
    170         ALOGE("%s: Stream %d: Already dequeued maximum number of simultaneous"
    171                 " buffers (%d)", __FUNCTION__, mId,
    172                 camera3_stream::max_buffers);
    173         return INVALID_OPERATION;
    174     }
    175 
    176     return OK;
    177 }
    178 
    179 status_t Camera3IOStreamBase::returnBufferPreconditionCheckLocked() const {
    180     // Allow buffers to be returned in the error state, to allow for disconnect
    181     // and in the in-config states for registration
    182     if (mState == STATE_CONSTRUCTED) {
    183         ALOGE("%s: Stream %d: Can't return buffers in unconfigured state %d",
    184                 __FUNCTION__, mId, mState);
    185         return INVALID_OPERATION;
    186     }
    187     if (mDequeuedBufferCount == 0) {
    188         ALOGE("%s: Stream %d: No buffers outstanding to return", __FUNCTION__,
    189                 mId);
    190         return INVALID_OPERATION;
    191     }
    192 
    193     return OK;
    194 }
    195 
    196 status_t Camera3IOStreamBase::returnAnyBufferLocked(
    197         const camera3_stream_buffer &buffer,
    198         nsecs_t timestamp,
    199         bool output) {
    200     status_t res;
    201 
    202     // returnBuffer may be called from a raw pointer, not a sp<>, and we'll be
    203     // decrementing the internal refcount next. In case this is the last ref, we
    204     // might get destructed on the decStrong(), so keep an sp around until the
    205     // end of the call - otherwise have to sprinkle the decStrong on all exit
    206     // points.
    207     sp<Camera3IOStreamBase> keepAlive(this);
    208     decStrong(this);
    209 
    210     if ((res = returnBufferPreconditionCheckLocked()) != OK) {
    211         return res;
    212     }
    213 
    214     sp<Fence> releaseFence;
    215     res = returnBufferCheckedLocked(buffer, timestamp, output,
    216                                     &releaseFence);
    217     // Res may be an error, but we still want to decrement our owned count
    218     // to enable clean shutdown. So we'll just return the error but otherwise
    219     // carry on
    220 
    221     if (releaseFence != 0) {
    222         mCombinedFence = Fence::merge(mName, mCombinedFence, releaseFence);
    223     }
    224 
    225     mDequeuedBufferCount--;
    226     if (mDequeuedBufferCount == 0 && mState != STATE_IN_CONFIG &&
    227             mState != STATE_IN_RECONFIG) {
    228         ALOGV("%s: Stream %d: All buffers returned; now idle", __FUNCTION__,
    229                 mId);
    230         sp<StatusTracker> statusTracker = mStatusTracker.promote();
    231         if (statusTracker != 0) {
    232             statusTracker->markComponentIdle(mStatusId, mCombinedFence);
    233         }
    234     }
    235 
    236     mBufferReturnedSignal.signal();
    237 
    238     if (output) {
    239         mLastTimestamp = timestamp;
    240     }
    241 
    242     return res;
    243 }
    244 
    245 
    246 
    247 }; // namespace camera3
    248 
    249 }; // namespace android
    250