Camera3IOStreamBase.cpp revision f1e98d857ec377f2c9b916073d40732e6ebb7ced 
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
29namespace android {
30
31namespace camera3 {
32
33Camera3IOStreamBase::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
51Camera3IOStreamBase::~Camera3IOStreamBase() {
52    disconnectLocked();
53}
54
55bool 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
66void 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
83status_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
104size_t Camera3IOStreamBase::getBufferCountLocked() {
105    return mTotalBufferCount;
106}
107
108status_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
130void 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
158status_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
179status_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
196status_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    if (res != OK) {
218        // NO_INIT means the buffer queue is abandoned, so to be resilient,
219        // still want to decrement in-flight counts.
220        if (res != NO_INIT) {
221            return res;
222        }
223    }
224
225    mCombinedFence = Fence::merge(mName, mCombinedFence, releaseFence);
226
227    mDequeuedBufferCount--;
228    if (mDequeuedBufferCount == 0 && mState != STATE_IN_CONFIG &&
229            mState != STATE_IN_RECONFIG) {
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 OK;
243}
244
245
246
247}; // namespace camera3
248
249}; // namespace android
250