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        android_dataspace dataSpace, camera3_stream_rotation_t rotation, int setId) :
35        Camera3Stream(id, type,
36                width, height, maxSize, format, dataSpace, rotation, setId),
37        mTotalBufferCount(0),
38        mHandoutTotalBufferCount(0),
39        mHandoutOutputBufferCount(0),
40        mFrameCount(0),
41        mLastTimestamp(0) {
42
43    mCombinedFence = new Fence();
44
45    if (maxSize > 0 &&
46            (format != HAL_PIXEL_FORMAT_BLOB && format != HAL_PIXEL_FORMAT_RAW_OPAQUE)) {
47        ALOGE("%s: Bad format for size-only stream: %d", __FUNCTION__,
48                format);
49        mState = STATE_ERROR;
50    }
51}
52
53Camera3IOStreamBase::~Camera3IOStreamBase() {
54    disconnectLocked();
55}
56
57bool Camera3IOStreamBase::hasOutstandingBuffersLocked() const {
58    nsecs_t signalTime = mCombinedFence->getSignalTime();
59    ALOGV("%s: Stream %d: Has %zu outstanding buffers,"
60            " buffer signal time is %" PRId64,
61            __FUNCTION__, mId, mHandoutTotalBufferCount, signalTime);
62    if (mHandoutTotalBufferCount > 0 || signalTime == INT64_MAX) {
63        return true;
64    }
65    return false;
66}
67
68void Camera3IOStreamBase::dump(int fd, const Vector<String16> &args) const {
69    (void) args;
70    String8 lines;
71
72    uint32_t consumerUsage = 0;
73    status_t res = getEndpointUsage(&consumerUsage);
74    if (res != OK) consumerUsage = 0;
75
76    lines.appendFormat("      State: %d\n", mState);
77    lines.appendFormat("      Dims: %d x %d, format 0x%x, dataspace 0x%x\n",
78            camera3_stream::width, camera3_stream::height,
79            camera3_stream::format, camera3_stream::data_space);
80    lines.appendFormat("      Max size: %zu\n", mMaxSize);
81    lines.appendFormat("      Combined usage: %d, max HAL buffers: %d\n",
82            camera3_stream::usage | consumerUsage, camera3_stream::max_buffers);
83    lines.appendFormat("      Frames produced: %d, last timestamp: %" PRId64 " ns\n",
84            mFrameCount, mLastTimestamp);
85    lines.appendFormat("      Total buffers: %zu, currently dequeued: %zu\n",
86            mTotalBufferCount, mHandoutTotalBufferCount);
87    write(fd, lines.string(), lines.size());
88
89    Camera3Stream::dump(fd, args);
90}
91
92status_t Camera3IOStreamBase::configureQueueLocked() {
93    status_t res;
94
95    switch (mState) {
96        case STATE_IN_RECONFIG:
97            res = disconnectLocked();
98            if (res != OK) {
99                return res;
100            }
101            break;
102        case STATE_IN_CONFIG:
103            // OK
104            break;
105        default:
106            ALOGE("%s: Bad state: %d", __FUNCTION__, mState);
107            return INVALID_OPERATION;
108    }
109
110    return OK;
111}
112
113size_t Camera3IOStreamBase::getBufferCountLocked() {
114    return mTotalBufferCount;
115}
116
117size_t Camera3IOStreamBase::getHandoutOutputBufferCountLocked() {
118    return mHandoutOutputBufferCount;
119}
120
121size_t Camera3IOStreamBase::getHandoutInputBufferCountLocked() {
122    return (mHandoutTotalBufferCount - mHandoutOutputBufferCount);
123}
124
125status_t Camera3IOStreamBase::disconnectLocked() {
126    switch (mState) {
127        case STATE_IN_RECONFIG:
128        case STATE_CONFIGURED:
129        case STATE_ABANDONED:
130            // OK
131            break;
132        default:
133            // No connection, nothing to do
134            ALOGV("%s: Stream %d: Already disconnected",
135                  __FUNCTION__, mId);
136            return -ENOTCONN;
137    }
138
139    if (mHandoutTotalBufferCount > 0) {
140        ALOGE("%s: Can't disconnect with %zu buffers still dequeued!",
141                __FUNCTION__, mHandoutTotalBufferCount);
142        return INVALID_OPERATION;
143    }
144
145   return OK;
146}
147
148void Camera3IOStreamBase::handoutBufferLocked(camera3_stream_buffer &buffer,
149                                              buffer_handle_t *handle,
150                                              int acquireFence,
151                                              int releaseFence,
152                                              camera3_buffer_status_t status,
153                                              bool output) {
154    /**
155     * Note that all fences are now owned by HAL.
156     */
157
158    // Handing out a raw pointer to this object. Increment internal refcount.
159    incStrong(this);
160    buffer.stream = this;
161    buffer.buffer = handle;
162    buffer.acquire_fence = acquireFence;
163    buffer.release_fence = releaseFence;
164    buffer.status = status;
165
166    // Inform tracker about becoming busy
167    if (mHandoutTotalBufferCount == 0 && mState != STATE_IN_CONFIG &&
168            mState != STATE_IN_RECONFIG && mState != STATE_PREPARING) {
169        /**
170         * Avoid a spurious IDLE->ACTIVE->IDLE transition when using buffers
171         * before/after register_stream_buffers during initial configuration
172         * or re-configuration, or during prepare pre-allocation
173         */
174        sp<StatusTracker> statusTracker = mStatusTracker.promote();
175        if (statusTracker != 0) {
176            statusTracker->markComponentActive(mStatusId);
177        }
178    }
179    mHandoutTotalBufferCount++;
180
181    if (output) {
182        mHandoutOutputBufferCount++;
183    }
184}
185
186status_t Camera3IOStreamBase::getBufferPreconditionCheckLocked() const {
187    // Allow dequeue during IN_[RE]CONFIG for registration, in
188    // PREPARING for pre-allocation
189    if (mState != STATE_CONFIGURED &&
190            mState != STATE_IN_CONFIG && mState != STATE_IN_RECONFIG &&
191            mState != STATE_PREPARING) {
192        ALOGE("%s: Stream %d: Can't get buffers in unconfigured state %d",
193                __FUNCTION__, mId, mState);
194        return INVALID_OPERATION;
195    }
196
197    return OK;
198}
199
200status_t Camera3IOStreamBase::returnBufferPreconditionCheckLocked() const {
201    // Allow buffers to be returned in the error state, to allow for disconnect
202    // and in the in-config states for registration
203    if (mState == STATE_CONSTRUCTED) {
204        ALOGE("%s: Stream %d: Can't return buffers in unconfigured state %d",
205                __FUNCTION__, mId, mState);
206        return INVALID_OPERATION;
207    }
208    if (mHandoutTotalBufferCount == 0) {
209        ALOGE("%s: Stream %d: No buffers outstanding to return", __FUNCTION__,
210                mId);
211        return INVALID_OPERATION;
212    }
213
214    return OK;
215}
216
217status_t Camera3IOStreamBase::returnAnyBufferLocked(
218        const camera3_stream_buffer &buffer,
219        nsecs_t timestamp,
220        bool output) {
221    status_t res;
222
223    // returnBuffer may be called from a raw pointer, not a sp<>, and we'll be
224    // decrementing the internal refcount next. In case this is the last ref, we
225    // might get destructed on the decStrong(), so keep an sp around until the
226    // end of the call - otherwise have to sprinkle the decStrong on all exit
227    // points.
228    sp<Camera3IOStreamBase> keepAlive(this);
229    decStrong(this);
230
231    if ((res = returnBufferPreconditionCheckLocked()) != OK) {
232        return res;
233    }
234
235    sp<Fence> releaseFence;
236    res = returnBufferCheckedLocked(buffer, timestamp, output,
237                                    &releaseFence);
238    // Res may be an error, but we still want to decrement our owned count
239    // to enable clean shutdown. So we'll just return the error but otherwise
240    // carry on
241
242    if (releaseFence != 0) {
243        mCombinedFence = Fence::merge(mName, mCombinedFence, releaseFence);
244    }
245
246    if (output) {
247        mHandoutOutputBufferCount--;
248    }
249
250    mHandoutTotalBufferCount--;
251    if (mHandoutTotalBufferCount == 0 && mState != STATE_IN_CONFIG &&
252            mState != STATE_IN_RECONFIG && mState != STATE_PREPARING) {
253        /**
254         * Avoid a spurious IDLE->ACTIVE->IDLE transition when using buffers
255         * before/after register_stream_buffers during initial configuration
256         * or re-configuration, or during prepare pre-allocation
257         */
258        ALOGV("%s: Stream %d: All buffers returned; now idle", __FUNCTION__,
259                mId);
260        sp<StatusTracker> statusTracker = mStatusTracker.promote();
261        if (statusTracker != 0) {
262            statusTracker->markComponentIdle(mStatusId, mCombinedFence);
263        }
264    }
265
266    mBufferReturnedSignal.signal();
267
268    if (output) {
269        mLastTimestamp = timestamp;
270    }
271
272    return res;
273}
274
275
276
277}; // namespace camera3
278
279}; // namespace android
280