Camera3IOStreamBase.cpp revision 61deb78a8a608955e120469ea7a5d39e652b2ae8 
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
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        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
51Camera3IOStreamBase::~Camera3IOStreamBase() {
52    disconnectLocked();
53}
54
55bool 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
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: %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
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
108size_t Camera3IOStreamBase::getHandoutOutputBufferCountLocked() {
109    return mHandoutOutputBufferCount;
110}
111
112size_t Camera3IOStreamBase::getHandoutInputBufferCountLocked() {
113    return (mHandoutTotalBufferCount - mHandoutOutputBufferCount);
114}
115
116status_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
138void 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
178status_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
190status_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
207status_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