Camera3IOStreamBase.cpp revision 7b82efe7a376c882f8f938e1c41b8311a8cdda4a 
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
28namespace android {
29
30namespace camera3 {
31
32Camera3IOStreamBase::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
50Camera3IOStreamBase::~Camera3IOStreamBase() {
51    disconnectLocked();
52}
53
54bool 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
65status_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
112void 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
129status_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
150size_t Camera3IOStreamBase::getBufferCountLocked() {
151    return mTotalBufferCount;
152}
153
154status_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
176void 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
196status_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
217status_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
234status_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