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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 #include <inttypes.h>
     22 
     23 #include <utils/Log.h>
     24 #include <utils/Trace.h>
     25 #include "device3/Camera3IOStreamBase.h"
     26 #include "device3/StatusTracker.h"
     27 
     28 namespace android {
     29 
     30 namespace camera3 {
     31 
     32 Camera3IOStreamBase::Camera3IOStreamBase(int id, camera3_stream_type_t type,
     33         uint32_t width, uint32_t height, size_t maxSize, int format) :
     34         Camera3Stream(id, type,
     35                 width, height, maxSize, format),
     36         mTotalBufferCount(0),
     37         mHandoutTotalBufferCount(0),
     38         mHandoutOutputBufferCount(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 %zu outstanding buffers,"
     58             " buffer signal time is %" PRId64,
     59             __FUNCTION__, mId, mHandoutTotalBufferCount, signalTime);
     60     if (mHandoutTotalBufferCount > 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: %zu\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: %" PRId64 " ns\n",
     77             mFrameCount, mLastTimestamp);
     78     lines.appendFormat("      Total buffers: %zu, currently dequeued: %zu\n",
     79             mTotalBufferCount, mHandoutTotalBufferCount);
     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 size_t Camera3IOStreamBase::getHandoutOutputBufferCountLocked() {
    109     return mHandoutOutputBufferCount;
    110 }
    111 
    112 size_t Camera3IOStreamBase::getHandoutInputBufferCountLocked() {
    113     return (mHandoutTotalBufferCount - mHandoutOutputBufferCount);
    114 }
    115 
    116 status_t Camera3IOStreamBase::disconnectLocked() {
    117     switch (mState) {
    118         case STATE_IN_RECONFIG:
    119         case STATE_CONFIGURED:
    120             // OK
    121             break;
    122         default:
    123             // No connection, nothing to do
    124             ALOGV("%s: Stream %d: Already disconnected",
    125                   __FUNCTION__, mId);
    126             return -ENOTCONN;
    127     }
    128 
    129     if (mHandoutTotalBufferCount > 0) {
    130         ALOGE("%s: Can't disconnect with %zu buffers still dequeued!",
    131                 __FUNCTION__, mHandoutTotalBufferCount);
    132         return INVALID_OPERATION;
    133     }
    134 
    135    return OK;
    136 }
    137 
    138 void Camera3IOStreamBase::handoutBufferLocked(camera3_stream_buffer &buffer,
    139                                               buffer_handle_t *handle,
    140                                               int acquireFence,
    141                                               int releaseFence,
    142                                               camera3_buffer_status_t status,
    143                                               bool output) {
    144     /**
    145      * Note that all fences are now owned by HAL.
    146      */
    147 
    148     // Handing out a raw pointer to this object. Increment internal refcount.
    149     incStrong(this);
    150     buffer.stream = this;
    151     buffer.buffer = handle;
    152     buffer.acquire_fence = acquireFence;
    153     buffer.release_fence = releaseFence;
    154     buffer.status = status;
    155 
    156     // Inform tracker about becoming busy
    157     if (mHandoutTotalBufferCount == 0 && mState != STATE_IN_CONFIG &&
    158             mState != STATE_IN_RECONFIG) {
    159         /**
    160          * Avoid a spurious IDLE->ACTIVE->IDLE transition when using buffers
    161          * before/after register_stream_buffers during initial configuration
    162          * or re-configuration.
    163          *
    164          * TODO: IN_CONFIG and IN_RECONFIG checks only make sense for <HAL3.2
    165          */
    166         sp<StatusTracker> statusTracker = mStatusTracker.promote();
    167         if (statusTracker != 0) {
    168             statusTracker->markComponentActive(mStatusId);
    169         }
    170     }
    171     mHandoutTotalBufferCount++;
    172 
    173     if (output) {
    174         mHandoutOutputBufferCount++;
    175     }
    176 }
    177 
    178 status_t Camera3IOStreamBase::getBufferPreconditionCheckLocked() const {
    179     // Allow dequeue during IN_[RE]CONFIG for registration
    180     if (mState != STATE_CONFIGURED &&
    181             mState != STATE_IN_CONFIG && mState != STATE_IN_RECONFIG) {
    182         ALOGE("%s: Stream %d: Can't get buffers in unconfigured state %d",
    183                 __FUNCTION__, mId, mState);
    184         return INVALID_OPERATION;
    185     }
    186 
    187     return OK;
    188 }
    189 
    190 status_t Camera3IOStreamBase::returnBufferPreconditionCheckLocked() const {
    191     // Allow buffers to be returned in the error state, to allow for disconnect
    192     // and in the in-config states for registration
    193     if (mState == STATE_CONSTRUCTED) {
    194         ALOGE("%s: Stream %d: Can't return buffers in unconfigured state %d",
    195                 __FUNCTION__, mId, mState);
    196         return INVALID_OPERATION;
    197     }
    198     if (mHandoutTotalBufferCount == 0) {
    199         ALOGE("%s: Stream %d: No buffers outstanding to return", __FUNCTION__,
    200                 mId);
    201         return INVALID_OPERATION;
    202     }
    203 
    204     return OK;
    205 }
    206 
    207 status_t Camera3IOStreamBase::returnAnyBufferLocked(
    208         const camera3_stream_buffer &buffer,
    209         nsecs_t timestamp,
    210         bool output) {
    211     status_t res;
    212 
    213     // returnBuffer may be called from a raw pointer, not a sp<>, and we'll be
    214     // decrementing the internal refcount next. In case this is the last ref, we
    215     // might get destructed on the decStrong(), so keep an sp around until the
    216     // end of the call - otherwise have to sprinkle the decStrong on all exit
    217     // points.
    218     sp<Camera3IOStreamBase> keepAlive(this);
    219     decStrong(this);
    220 
    221     if ((res = returnBufferPreconditionCheckLocked()) != OK) {
    222         return res;
    223     }
    224 
    225     sp<Fence> releaseFence;
    226     res = returnBufferCheckedLocked(buffer, timestamp, output,
    227                                     &releaseFence);
    228     // Res may be an error, but we still want to decrement our owned count
    229     // to enable clean shutdown. So we'll just return the error but otherwise
    230     // carry on
    231 
    232     if (releaseFence != 0) {
    233         mCombinedFence = Fence::merge(mName, mCombinedFence, releaseFence);
    234     }
    235 
    236     if (output) {
    237         mHandoutOutputBufferCount--;
    238     }
    239 
    240     mHandoutTotalBufferCount--;
    241     if (mHandoutTotalBufferCount == 0 && mState != STATE_IN_CONFIG &&
    242             mState != STATE_IN_RECONFIG) {
    243         /**
    244          * Avoid a spurious IDLE->ACTIVE->IDLE transition when using buffers
    245          * before/after register_stream_buffers during initial configuration
    246          * or re-configuration.
    247          *
    248          * TODO: IN_CONFIG and IN_RECONFIG checks only make sense for <HAL3.2
    249          */
    250         ALOGV("%s: Stream %d: All buffers returned; now idle", __FUNCTION__,
    251                 mId);
    252         sp<StatusTracker> statusTracker = mStatusTracker.promote();
    253         if (statusTracker != 0) {
    254             statusTracker->markComponentIdle(mStatusId, mCombinedFence);
    255         }
    256     }
    257 
    258     mBufferReturnedSignal.signal();
    259 
    260     if (output) {
    261         mLastTimestamp = timestamp;
    262     }
    263 
    264     return res;
    265 }
    266 
    267 
    268 
    269 }; // namespace camera3
    270 
    271 }; // namespace android
    272