cgit.sxemacs.org Git - harmattan/cameraplus/blob - src/cameraresources.cpp

   1 #include "cameraresources.h"
   2 #include <QDebug>
   3
   4 using namespace ResourcePolicy;
   5
   6 CameraResources::CameraResources(QObject *parent) :
   7   QObject(parent),
   8   m_set(new ResourceSet("camera", this, true, true)),
   9   m_mode(None), m_acquired(false) {
  10
  11   QObject::connect(m_set, SIGNAL(resourcesReleased()), this, SLOT(resourcesReleased()));
  12   QObject::connect(m_set, SIGNAL(lostResources()), this, SLOT(lostResources()));
  13   QObject::connect(m_set, SIGNAL(resourcesGranted(const QList<ResourcePolicy::ResourceType>&)),
  14                    this, SLOT(resourcesGranted(const QList<ResourcePolicy::ResourceType>&)));
  15   QObject::connect(m_set, SIGNAL(updateOK()), this, SLOT(updateOK()));
  16
  17   if (!m_set->initAndConnect()) {
  18     qCritical() << "Failed to connect to resource policy engine";
  19   }
  20 }
  21
  22 CameraResources::~CameraResources() {
  23   acquire(None);
  24 }
  25
  26 void CameraResources::acquire(const CameraResources::Mode& mode) {
  27   if (mode == m_mode) {
  28     // We need to emit this because the UI migh be waiting
  29     emit acquiredChanged();
  30     return;
  31   }
  32
  33   m_mode = mode;
  34
  35   switch (m_mode) {
  36   case None:
  37     m_set->release();
  38     break;
  39
  40   case Image:
  41     updateSet(QList<ResourcePolicy::ResourceType>()
  42               << ResourcePolicy::VideoPlaybackType
  43               << ResourcePolicy::VideoRecorderType
  44               << ResourcePolicy::ScaleButtonType
  45               << ResourcePolicy::SnapButtonType);
  46     break;
  47
  48   case Video:
  49     updateSet(QList<ResourcePolicy::ResourceType>()
  50               << ResourcePolicy::VideoPlaybackType
  51               << ResourcePolicy::VideoRecorderType
  52               << ResourcePolicy::ScaleButtonType
  53               << ResourcePolicy::SnapButtonType);
  54     break;
  55
  56   case Recording:
  57     updateSet(QList<ResourcePolicy::ResourceType>()
  58               << ResourcePolicy::VideoPlaybackType
  59               << ResourcePolicy::VideoRecorderType
  60               << ResourcePolicy::ScaleButtonType
  61               << ResourcePolicy::SnapButtonType
  62               << ResourcePolicy::AudioRecorderType,
  63               QList<ResourcePolicy::ResourceType>()
  64               << ResourcePolicy::AudioPlaybackType);
  65     break;
  66
  67   case PostCapture:
  68     updateSet(QList<ResourcePolicy::ResourceType>()
  69               << ResourcePolicy::VideoPlaybackType
  70               << ResourcePolicy::ScaleButtonType,
  71               QList<ResourcePolicy::ResourceType>()
  72               << ResourcePolicy::AudioPlaybackType);
  73
  74     break;
  75
  76   default:
  77     qWarning() << "Unknown mode" << mode;
  78
  79     break;
  80   }
  81 }
  82
  83 bool CameraResources::acquired() const {
  84   return m_acquired;
  85 }
  86
  87 void CameraResources::resourcesReleased() {
  88   m_mode = None;
  89   m_acquired = false;
  90   emit acquiredChanged();
  91 }
  92
  93 void CameraResources::lostResources() {
  94   m_mode = None;
  95   m_acquired = false;
  96   emit acquiredChanged();
  97 }
  98
  99 void CameraResources::resourcesGranted(const QList<ResourcePolicy::ResourceType>& optional) {
 100   Q_UNUSED(optional);
 101
 102   m_acquired = true;
 103   emit acquiredChanged();
 104 }
 105
 106 void CameraResources::updateOK() {
 107   m_acquired = true;
 108   emit acquiredChanged();
 109 }
 110
 111 QList<ResourcePolicy::ResourceType> CameraResources::listSet() {
 112   QList<Resource *> resources = m_set->resources();
 113   QList<ResourcePolicy::ResourceType> set;
 114
 115   foreach (Resource *r, resources) {
 116     set << r->type();
 117   }
 118
 119   return set;
 120 }
 121
 122 void CameraResources::updateSet(const QList<ResourcePolicy::ResourceType>& required,
 123                                 const QList<ResourcePolicy::ResourceType>& optional) {
 124
 125   QList<ResourcePolicy::ResourceType> set = listSet();
 126
 127   foreach (ResourceType r, set) {
 128     // Check for acquired resources that should be dropped.
 129     if (required.indexOf(r) == -1) {
 130       m_set->deleteResource(r);
 131     }
 132   }
 133
 134   foreach (ResourceType r, required) {
 135     // TODO: AudioPlayback needs special handling
 136     m_set->addResource(r);
 137   }
 138
 139   // TODO: optional resources
 140
 141   m_set->update();
 142 }