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path: root/v3/EmulatedQemuCameraDevice.cpp (plain)
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1/*
2 * Copyright (C) 2011 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/*
18 * Contains implementation of a class EmulatedQemuCameraDevice that encapsulates
19 * an emulated camera device connected to the host.
20 */
21
22#define LOG_NDEBUG 0
23#define LOG_TAG "EmulatedCamera_QemuDevice"
24#include <cutils/log.h>
25#include "EmulatedQemuCamera.h"
26#include "EmulatedQemuCameraDevice.h"
27
28namespace android {
29
30EmulatedQemuCameraDevice::EmulatedQemuCameraDevice(EmulatedQemuCamera* camera_hal)
31 : EmulatedCameraDevice(camera_hal),
32 mQemuClient(),
33 mPreviewFrame(NULL)
34{
35}
36
37EmulatedQemuCameraDevice::~EmulatedQemuCameraDevice()
38{
39 if (mPreviewFrame != NULL) {
40 delete[] mPreviewFrame;
41 }
42}
43
44/****************************************************************************
45 * Public API
46 ***************************************************************************/
47
48status_t EmulatedQemuCameraDevice::Initialize(const char* device_name)
49{
50 /* Connect to the service. */
51 char connect_str[256];
52 snprintf(connect_str, sizeof(connect_str), "name=%s", device_name);
53 status_t res = mQemuClient.connectClient(connect_str);
54 if (res != NO_ERROR) {
55 return res;
56 }
57
58 /* Initialize base class. */
59 res = EmulatedCameraDevice::Initialize();
60 if (res == NO_ERROR) {
61 ALOGV("%s: Connected to the emulated camera service '%s'",
62 __FUNCTION__, device_name);
63 mDeviceName = device_name;
64 } else {
65 mQemuClient.queryDisconnect();
66 }
67
68 return res;
69}
70
71/****************************************************************************
72 * Emulated camera device abstract interface implementation.
73 ***************************************************************************/
74
75status_t EmulatedQemuCameraDevice::connectDevice()
76{
77 ALOGV("%s", __FUNCTION__);
78
79 Mutex::Autolock locker(&mObjectLock);
80 if (!isInitialized()) {
81 ALOGE("%s: Qemu camera device is not initialized.", __FUNCTION__);
82 return EINVAL;
83 }
84 if (isConnected()) {
85 ALOGW("%s: Qemu camera device '%s' is already connected.",
86 __FUNCTION__, (const char*)mDeviceName);
87 return NO_ERROR;
88 }
89
90 /* Connect to the camera device via emulator. */
91 const status_t res = mQemuClient.queryConnect();
92 if (res == NO_ERROR) {
93 ALOGV("%s: Connected to device '%s'",
94 __FUNCTION__, (const char*)mDeviceName);
95 mState = ECDS_CONNECTED;
96 } else {
97 ALOGE("%s: Connection to device '%s' failed",
98 __FUNCTION__, (const char*)mDeviceName);
99 }
100
101 return res;
102}
103
104status_t EmulatedQemuCameraDevice::disconnectDevice()
105{
106 ALOGV("%s", __FUNCTION__);
107
108 Mutex::Autolock locker(&mObjectLock);
109 if (!isConnected()) {
110 ALOGW("%s: Qemu camera device '%s' is already disconnected.",
111 __FUNCTION__, (const char*)mDeviceName);
112 return NO_ERROR;
113 }
114 if (isStarted()) {
115 ALOGE("%s: Cannot disconnect from the started device '%s.",
116 __FUNCTION__, (const char*)mDeviceName);
117 return EINVAL;
118 }
119
120 /* Disconnect from the camera device via emulator. */
121 const status_t res = mQemuClient.queryDisconnect();
122 if (res == NO_ERROR) {
123 ALOGV("%s: Disonnected from device '%s'",
124 __FUNCTION__, (const char*)mDeviceName);
125 mState = ECDS_INITIALIZED;
126 } else {
127 ALOGE("%s: Disconnection from device '%s' failed",
128 __FUNCTION__, (const char*)mDeviceName);
129 }
130
131 return res;
132}
133
134status_t EmulatedQemuCameraDevice::startDevice(int width,
135 int height,
136 uint32_t pix_fmt)
137{
138 ALOGV("%s", __FUNCTION__);
139
140 Mutex::Autolock locker(&mObjectLock);
141 if (!isConnected()) {
142 ALOGE("%s: Qemu camera device '%s' is not connected.",
143 __FUNCTION__, (const char*)mDeviceName);
144 return EINVAL;
145 }
146 if (isStarted()) {
147 ALOGW("%s: Qemu camera device '%s' is already started.",
148 __FUNCTION__, (const char*)mDeviceName);
149 return NO_ERROR;
150 }
151
152 status_t res = EmulatedCameraDevice::commonStartDevice(width, height, pix_fmt);
153 if (res != NO_ERROR) {
154 ALOGE("%s: commonStartDevice failed", __FUNCTION__);
155 return res;
156 }
157
158 /* Allocate preview frame buffer. */
159 /* TODO: Watch out for preview format changes! At this point we implement
160 * RGB32 only.*/
161 mPreviewFrame = new uint32_t[mTotalPixels];
162 if (mPreviewFrame == NULL) {
163 ALOGE("%s: Unable to allocate %d bytes for preview frame",
164 __FUNCTION__, mTotalPixels);
165 return ENOMEM;
166 }
167
168 /* Start the actual camera device. */
169 res = mQemuClient.queryStart(mPixelFormat, mFrameWidth, mFrameHeight);
170 if (res == NO_ERROR) {
171 ALOGV("%s: Qemu camera device '%s' is started for %.4s[%dx%d] frames",
172 __FUNCTION__, (const char*)mDeviceName,
173 reinterpret_cast<const char*>(&mPixelFormat),
174 mFrameWidth, mFrameHeight);
175 mState = ECDS_STARTED;
176 } else {
177 ALOGE("%s: Unable to start device '%s' for %.4s[%dx%d] frames",
178 __FUNCTION__, (const char*)mDeviceName,
179 reinterpret_cast<const char*>(&pix_fmt), width, height);
180 }
181
182 return res;
183}
184
185status_t EmulatedQemuCameraDevice::stopDevice()
186{
187 ALOGV("%s", __FUNCTION__);
188
189 Mutex::Autolock locker(&mObjectLock);
190 if (!isStarted()) {
191 ALOGW("%s: Qemu camera device '%s' is not started.",
192 __FUNCTION__, (const char*)mDeviceName);
193 return NO_ERROR;
194 }
195
196 /* Stop the actual camera device. */
197 status_t res = mQemuClient.queryStop();
198 if (res == NO_ERROR) {
199 if (mPreviewFrame == NULL) {
200 delete[] mPreviewFrame;
201 mPreviewFrame = NULL;
202 }
203 EmulatedCameraDevice::commonStopDevice();
204 mState = ECDS_CONNECTED;
205 ALOGV("%s: Qemu camera device '%s' is stopped",
206 __FUNCTION__, (const char*)mDeviceName);
207 } else {
208 ALOGE("%s: Unable to stop device '%s'",
209 __FUNCTION__, (const char*)mDeviceName);
210 }
211
212 return res;
213}
214
215/****************************************************************************
216 * EmulatedCameraDevice virtual overrides
217 ***************************************************************************/
218
219status_t EmulatedQemuCameraDevice::getCurrentPreviewFrame(void* buffer)
220{
221 ALOGW_IF(mPreviewFrame == NULL, "%s: No preview frame", __FUNCTION__);
222 if (mPreviewFrame != NULL) {
223 memcpy(buffer, mPreviewFrame, mTotalPixels * 4);
224 return 0;
225 } else {
226 return EmulatedCameraDevice::getCurrentPreviewFrame(buffer);
227 }
228}
229
230/****************************************************************************
231 * Worker thread management overrides.
232 ***************************************************************************/
233
234bool EmulatedQemuCameraDevice::inWorkerThread()
235{
236 /* Wait till FPS timeout expires, or thread exit message is received. */
237 WorkerThread::SelectRes res =
238 getWorkerThread()->Select(-1, 1000000 / mEmulatedFPS);
239 if (res == WorkerThread::EXIT_THREAD) {
240 ALOGV("%s: Worker thread has been terminated.", __FUNCTION__);
241 return false;
242 }
243
244 /* Query frames from the service. */
245 status_t query_res = mQemuClient.queryFrame(mCurrentFrame, mPreviewFrame,
246 mFrameBufferSize,
247 mTotalPixels * 4,
248 mWhiteBalanceScale[0],
249 mWhiteBalanceScale[1],
250 mWhiteBalanceScale[2],
251 mExposureCompensation);
252 if (query_res == NO_ERROR) {
253 /* Timestamp the current frame, and notify the camera HAL. */
254 mCurFrameTimestamp = systemTime(SYSTEM_TIME_MONOTONIC);
255 mCameraHAL->onNextFrameAvailable(mCurrentFrame, mCurFrameTimestamp, this);
256 return true;
257 } else {
258 ALOGE("%s: Unable to get current video frame: %s",
259 __FUNCTION__, strerror(query_res));
260 mCameraHAL->onCameraDeviceError(CAMERA_ERROR_SERVER_DIED);
261 return false;
262 }
263}
264
265}; /* namespace android */
266
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