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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 "Camera3IOStreamBase.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         mDequeuedBufferCount(0),
     38         mFrameCount(0),
     39         mLastTimestamp(0) {
     40 
     41     mCombinedFence = new Fence();
     42 
     43     if (maxSize > 0 && format != HAL_PIXEL_FORMAT_BLOB) {
     44         ALOGE("%s: Bad format for size-only stream: %d", __FUNCTION__,
     45                 format);
     46         mState = STATE_ERROR;
     47     }
     48 }
     49 
     50 Camera3IOStreamBase::~Camera3IOStreamBase() {
     51     disconnectLocked();
     52 }
     53 
     54 bool Camera3IOStreamBase::hasOutstandingBuffersLocked() const {
     55     nsecs_t signalTime = mCombinedFence->getSignalTime();
     56     ALOGV("%s: Stream %d: Has %d outstanding buffers,"
     57             " buffer signal time is %lld",
     58             __FUNCTION__, mId, mDequeuedBufferCount, signalTime);
     59     if (mDequeuedBufferCount > 0 || signalTime == INT64_MAX) {
     60         return true;
     61     }
     62     return false;
     63 }
     64 
     65 status_t Camera3IOStreamBase::waitUntilIdle(nsecs_t timeout) {
     66     status_t res;
     67     {
     68         Mutex::Autolock l(mLock);
     69         while (mDequeuedBufferCount > 0) {
     70             if (timeout != TIMEOUT_NEVER) {
     71                 nsecs_t startTime = systemTime();
     72                 res = mBufferReturnedSignal.waitRelative(mLock, timeout);
     73                 if (res == TIMED_OUT) {
     74                     return res;
     75                 } else if (res != OK) {
     76                     ALOGE("%s: Error waiting for outstanding buffers: %s (%d)",
     77                             __FUNCTION__, strerror(-res), res);
     78                     return res;
     79                 }
     80                 nsecs_t deltaTime = systemTime() - startTime;
     81                 if (timeout <= deltaTime) {
     82                     timeout = 0;
     83                 } else {
     84                     timeout -= deltaTime;
     85                 }
     86             } else {
     87                 res = mBufferReturnedSignal.wait(mLock);
     88                 if (res != OK) {
     89                     ALOGE("%s: Error waiting for outstanding buffers: %s (%d)",
     90                             __FUNCTION__, strerror(-res), res);
     91                     return res;
     92                 }
     93             }
     94         }
     95     }
     96 
     97     // No lock
     98 
     99     unsigned int timeoutMs;
    100     if (timeout == TIMEOUT_NEVER) {
    101         timeoutMs = Fence::TIMEOUT_NEVER;
    102     } else if (timeout == 0) {
    103         timeoutMs = 0;
    104     } else {
    105         // Round up to wait at least 1 ms
    106         timeoutMs = (timeout + 999999) / 1000000;
    107     }
    108 
    109     return mCombinedFence->wait(timeoutMs);
    110 }
    111 
    112 void Camera3IOStreamBase::dump(int fd, const Vector<String16> &args) const {
    113     (void) args;
    114     String8 lines;
    115     lines.appendFormat("      State: %d\n", mState);
    116     lines.appendFormat("      Dims: %d x %d, format 0x%x\n",
    117             camera3_stream::width, camera3_stream::height,
    118             camera3_stream::format);
    119     lines.appendFormat("      Max size: %d\n", mMaxSize);
    120     lines.appendFormat("      Usage: %d, max HAL buffers: %d\n",
    121             camera3_stream::usage, camera3_stream::max_buffers);
    122     lines.appendFormat("      Frames produced: %d, last timestamp: %lld ns\n",
    123             mFrameCount, mLastTimestamp);
    124     lines.appendFormat("      Total buffers: %d, currently dequeued: %d\n",
    125             mTotalBufferCount, mDequeuedBufferCount);
    126     write(fd, lines.string(), lines.size());
    127 }
    128 
    129 status_t Camera3IOStreamBase::configureQueueLocked() {
    130     status_t res;
    131 
    132     switch (mState) {
    133         case STATE_IN_RECONFIG:
    134             res = disconnectLocked();
    135             if (res != OK) {
    136                 return res;
    137             }
    138             break;
    139         case STATE_IN_CONFIG:
    140             // OK
    141             break;
    142         default:
    143             ALOGE("%s: Bad state: %d", __FUNCTION__, mState);
    144             return INVALID_OPERATION;
    145     }
    146 
    147     return OK;
    148 }
    149 
    150 size_t Camera3IOStreamBase::getBufferCountLocked() {
    151     return mTotalBufferCount;
    152 }
    153 
    154 status_t Camera3IOStreamBase::disconnectLocked() {
    155     switch (mState) {
    156         case STATE_IN_RECONFIG:
    157         case STATE_CONFIGURED:
    158             // OK
    159             break;
    160         default:
    161             // No connection, nothing to do
    162             ALOGV("%s: Stream %d: Already disconnected",
    163                   __FUNCTION__, mId);
    164             return -ENOTCONN;
    165     }
    166 
    167     if (mDequeuedBufferCount > 0) {
    168         ALOGE("%s: Can't disconnect with %d buffers still dequeued!",
    169                 __FUNCTION__, mDequeuedBufferCount);
    170         return INVALID_OPERATION;
    171     }
    172 
    173    return OK;
    174 }
    175 
    176 void Camera3IOStreamBase::handoutBufferLocked(camera3_stream_buffer &buffer,
    177                                               buffer_handle_t *handle,
    178                                               int acquireFence,
    179                                               int releaseFence,
    180                                               camera3_buffer_status_t status) {
    181     /**
    182      * Note that all fences are now owned by HAL.
    183      */
    184 
    185     // Handing out a raw pointer to this object. Increment internal refcount.
    186     incStrong(this);
    187     buffer.stream = this;
    188     buffer.buffer = handle;
    189     buffer.acquire_fence = acquireFence;
    190     buffer.release_fence = releaseFence;
    191     buffer.status = status;
    192 
    193     mDequeuedBufferCount++;
    194 }
    195 
    196 status_t Camera3IOStreamBase::getBufferPreconditionCheckLocked() const {
    197     // Allow dequeue during IN_[RE]CONFIG for registration
    198     if (mState != STATE_CONFIGURED &&
    199             mState != STATE_IN_CONFIG && mState != STATE_IN_RECONFIG) {
    200         ALOGE("%s: Stream %d: Can't get buffers in unconfigured state %d",
    201                 __FUNCTION__, mId, mState);
    202         return INVALID_OPERATION;
    203     }
    204 
    205     // Only limit dequeue amount when fully configured
    206     if (mState == STATE_CONFIGURED &&
    207             mDequeuedBufferCount == camera3_stream::max_buffers) {
    208         ALOGE("%s: Stream %d: Already dequeued maximum number of simultaneous"
    209                 " buffers (%d)", __FUNCTION__, mId,
    210                 camera3_stream::max_buffers);
    211         return INVALID_OPERATION;
    212     }
    213 
    214     return OK;
    215 }
    216 
    217 status_t Camera3IOStreamBase::returnBufferPreconditionCheckLocked() const {
    218     // Allow buffers to be returned in the error state, to allow for disconnect
    219     // and in the in-config states for registration
    220     if (mState == STATE_CONSTRUCTED) {
    221         ALOGE("%s: Stream %d: Can't return buffers in unconfigured state %d",
    222                 __FUNCTION__, mId, mState);
    223         return INVALID_OPERATION;
    224     }
    225     if (mDequeuedBufferCount == 0) {
    226         ALOGE("%s: Stream %d: No buffers outstanding to return", __FUNCTION__,
    227                 mId);
    228         return INVALID_OPERATION;
    229     }
    230 
    231     return OK;
    232 }
    233 
    234 status_t Camera3IOStreamBase::returnAnyBufferLocked(
    235         const camera3_stream_buffer &buffer,
    236         nsecs_t timestamp,
    237         bool output) {
    238     status_t res;
    239 
    240     // returnBuffer may be called from a raw pointer, not a sp<>, and we'll be
    241     // decrementing the internal refcount next. In case this is the last ref, we
    242     // might get destructed on the decStrong(), so keep an sp around until the
    243     // end of the call - otherwise have to sprinkle the decStrong on all exit
    244     // points.
    245     sp<Camera3IOStreamBase> keepAlive(this);
    246     decStrong(this);
    247 
    248     if ((res = returnBufferPreconditionCheckLocked()) != OK) {
    249         return res;
    250     }
    251 
    252     sp<Fence> releaseFence;
    253     res = returnBufferCheckedLocked(buffer, timestamp, output,
    254                                     &releaseFence);
    255     if (res != OK) {
    256         return res;
    257     }
    258 
    259     mCombinedFence = Fence::merge(mName, mCombinedFence, releaseFence);
    260 
    261     mDequeuedBufferCount--;
    262     mBufferReturnedSignal.signal();
    263 
    264     if (output) {
    265         mLastTimestamp = timestamp;
    266     }
    267 
    268     return OK;
    269 }
    270 
    271 
    272 
    273 }; // namespace camera3
    274 
    275 }; // namespace android
    276