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