Argus Camera Sample
Argus Camera Sample
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MultiSession.cpp
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28 
29 #include <sstream>
30 
31 #include "MultiSession.h"
32 #include "Composer.h"
33 #include "Dispatcher.h"
34 #include "Error.h"
35 #include "UniquePointer.h"
36 #include "PerfTracker.h"
37 
38 namespace ArgusSamples
39 {
40 
42  : m_initialized(false)
43  , m_running(false)
44  , m_prevRunning(false)
45 {
46 }
47 
49 {
50  shutdown();
51 }
52 
54 {
55 }
56 
58 {
59  shutdown();
60 }
61 
62 bool TaskMultiSession::Session::initialize(uint32_t deviceIndex)
63 {
64  // create the perf tracker
65  m_perfTracker.reset(new SessionPerfTracker());
66  if (!m_perfTracker)
67  ORIGINATE_ERROR("Out of memory");
68 
69  PROPAGATE_ERROR(m_perfTracker->onEvent(SESSION_EVENT_TASK_START));
70 
71  Composer &composer = Composer::getInstance();
72  Dispatcher &dispatcher = Dispatcher::getInstance();
73 
74  // create the session using the current device index
75  PROPAGATE_ERROR(dispatcher.createSession(m_session, deviceIndex));
76  PROPAGATE_ERROR(m_perfTracker->setSession(m_session.get()));
77 
78  // create the request
79  PROPAGATE_ERROR(dispatcher.createRequest(m_request, Argus::CAPTURE_INTENT_STILL_CAPTURE,
80  m_session.get()));
81 
82  // Create the preview stream
83  PROPAGATE_ERROR(dispatcher.createOutputStream(m_request.get(), false, m_outputStream,
84  m_session.get()));
85 
86  // bind the preview stream to the composer
87  Argus::IEGLOutputStream *iEGLOutputStream =
88  Argus::interface_cast<Argus::IEGLOutputStream>(m_outputStream.get());
89  if (!iEGLOutputStream)
90  ORIGINATE_ERROR("Failed to get IEGLOutputStream interface");
91 
92  // Bind the stream to the composer
93  PROPAGATE_ERROR(composer.bindStream(iEGLOutputStream->getEGLStream()));
94 
95  const Argus::Size2D<uint32_t> streamSize = iEGLOutputStream->getResolution();
96  PROPAGATE_ERROR(composer.setStreamAspectRatio(iEGLOutputStream->getEGLStream(),
97  (float)streamSize.width() / (float)streamSize.height()));
98 
99  // Enable the output stream
100  PROPAGATE_ERROR(dispatcher.enableOutputStream(m_request.get(), m_outputStream.get()));
101 
102  return true;
103 }
104 
106 {
107  Composer &composer = Composer::getInstance();
108 
109  // activate the streams and populate the burst request array
110  PROPAGATE_ERROR(composer.setStreamActive(
111  Argus::interface_cast<Argus::IEGLOutputStream>(m_outputStream)->getEGLStream(), true));
112 
113  // start the repeating burst request for the preview
114  PROPAGATE_ERROR(m_perfTracker->onEvent(SESSION_EVENT_ISSUE_CAPTURE));
115  PROPAGATE_ERROR(Dispatcher::getInstance().startRepeat(m_request.get(), m_session.get()));
116 
117  return true;
118 }
119 
121 {
122  PROPAGATE_ERROR(m_perfTracker->onEvent(SESSION_EVENT_CLOSE_REQUESTED));
123 
124  Dispatcher &dispatcher = Dispatcher::getInstance();
125  Composer &composer = Composer::getInstance();
126 
127  PROPAGATE_ERROR(dispatcher.stopRepeat(m_session.get()));
128  PROPAGATE_ERROR(composer.setStreamActive(
129  Argus::interface_cast<Argus::IEGLOutputStream>(m_outputStream)->getEGLStream(), false));
130  PROPAGATE_ERROR(dispatcher.waitForIdle(m_session.get()));
131  PROPAGATE_ERROR(m_perfTracker->onEvent(SESSION_EVENT_FLUSH_DONE));
132 
133  return true;
134 }
135 
137 {
138  if (m_request)
139  {
140  Dispatcher &dispatcher = Dispatcher::getInstance();
141  Composer &composer = Composer::getInstance();
142 
143  if (m_outputStream)
144  {
145  // destroy the producer
146  PROPAGATE_ERROR_CONTINUE(dispatcher.disableOutputStream(m_request.get(),
147  m_outputStream.get()));
148 
149  Argus::IEGLOutputStream *iEGLOutputStream =
150  Argus::interface_cast<Argus::IEGLOutputStream>(m_outputStream);
151  if (!iEGLOutputStream)
152  REPORT_ERROR("Failed to get IEGLOutputStream interface");
153 
154  // disconnect the EGL stream
155  iEGLOutputStream->disconnect();
156 
157  // unbind the EGL stream from the composer
158  PROPAGATE_ERROR_CONTINUE(composer.unbindStream(iEGLOutputStream->getEGLStream()));
159 
160  m_outputStream.reset();
161  }
162 
163  // destroy the request
164  PROPAGATE_ERROR_CONTINUE(m_request.reset());
165  }
166 
167  PROPAGATE_ERROR(m_perfTracker->onEvent(SESSION_EVENT_CLOSE_DONE));
168 
169  // Destroy the session
170  m_session.reset();
171 
172  return true;
173 }
174 
176 {
177  if (m_initialized)
178  return true;
179 
180  PROPAGATE_ERROR(Dispatcher::getInstance().m_sensorModeValid.registerObserver(this,
181  static_cast<IObserver::CallbackFunction>(&TaskMultiSession::onSensorModeValidChanged)));
182  PROPAGATE_ERROR(Dispatcher::getInstance().m_outputSize.registerObserver(this,
183  static_cast<IObserver::CallbackFunction>(&TaskMultiSession::restartStreams)));
184 
185  m_initialized = true;
186 
187  return true;
188 }
189 
191 {
192  if (!m_initialized)
193  return true;
194 
195  // stop the preview
196  PROPAGATE_ERROR(stop());
197 
198  PROPAGATE_ERROR_CONTINUE(Dispatcher::getInstance().m_outputSize.unregisterObserver(this,
199  static_cast<IObserver::CallbackFunction>(&TaskMultiSession::restartStreams)));
200  PROPAGATE_ERROR_CONTINUE(Dispatcher::getInstance().m_sensorModeValid.unregisterObserver(this,
201  static_cast<IObserver::CallbackFunction>(&TaskMultiSession::onSensorModeValidChanged)));
202 
203  m_initialized = false;
204 
205  return true;
206 }
207 
209 {
210  if (!m_sessions.empty())
211  {
212  // shutdown the sessions
213  for (std::list<Session*>::iterator it = m_sessions.begin(); it != m_sessions.end(); ++it)
214  {
215  Session *session = *it;
216  PROPAGATE_ERROR_CONTINUE(session->shutdown());
217  delete session;
218  }
219  m_sessions.clear();
220  }
221 
222  return true;
223 }
224 
226 {
227  if (m_running)
228  return true;
229 
230  Dispatcher &dispatcher = Dispatcher::getInstance();
231 
232  if (m_sessions.empty())
233  {
234  const uint32_t deviceCount = dispatcher.getDeviceCount();
235 
236  if (deviceCount == 0)
237  ORIGINATE_ERROR("No camera devices found");
238 
239  // create a request and streams for each session
240  for (uint32_t deviceIndex = 0; deviceIndex < deviceCount; ++deviceIndex)
241  {
242  UniquePointer<Session> session(new Session);
243 
244  if (!session)
245  ORIGINATE_ERROR("Out of memory");
246 
247  PROPAGATE_ERROR(session->initialize(deviceIndex));
248 
249  m_sessions.push_back(session.release());
250  }
251  }
252 
253  // start the sessions
254  for (std::list<Session*>::iterator it = m_sessions.begin(); it != m_sessions.end(); ++it)
255  {
256  Session *session = *it;
257  PROPAGATE_ERROR(session->start());
258  }
259 
260  m_running = true;
261 
262  return true;
263 }
264 
266 {
267  if (!m_running)
268  return true;
269 
270  for (std::list<Session*>::iterator it = m_sessions.begin(); it != m_sessions.end(); ++it)
271  {
272  Session *session = *it;
273  PROPAGATE_ERROR(session->stop());
274  }
275 
276  PROPAGATE_ERROR(shutdownSessions());
277 
278  m_running = false;
279 
280  return true;
281 }
282 
283 bool TaskMultiSession::onSensorModeValidChanged(const Observed &source)
284 {
285  const bool isTrue = static_cast<const Value<bool>&>(source).get();
286 
287  if (!isTrue)
288  {
290  if (m_running)
291  {
292  PROPAGATE_ERROR(stop());
293  }
294  }
295  else if (m_prevRunning)
296  {
297  m_prevRunning = false;
298  PROPAGATE_ERROR(start());
299  }
300 
301  return true;
302 }
303 
304 bool TaskMultiSession::restartStreams(__attribute__((unused)) const Observed &source)
305 {
306  if (m_running)
307  {
308  PROPAGATE_ERROR(stop());
309  PROPAGATE_ERROR(start());
310  }
311  return true;
312 }
313 
314 }; // namespace ArgusSamples