It's libaalcamera.so (https://launchpad.net/ubuntu/+source/qtubuntu-
camera) that sets illegal values:
android_camera_set_preview_size(-1, -1)
android_camera_set_preview_fps(0)
However, it's camera.goldfish.so that returns wrong preview fps range
values. According to Android doc[1], the returned values should be
scaled by 1000 but were not.
As for preview-size, it looks like a bug in
AalViewfinderSettingsControl::chooseOptimalSize because it may still
return invalid QSize even when there are non-optimal candidates
available. Besides, the magic number in line 213 looks dangerous because
sizes[1] may be illegal.
208 QSize AalViewfinderSettingsControl::chooseOptimalSize(const QList<QSize>
&sizes) const
209 {
210 if (!sizes.empty()) {
211 if (m_aspectRatio == 0) {
212 // There are resolutions supported, choose one non-optimal one):
213 return sizes[1];
214 }
215
216 QList<QSize>::const_iterator it = sizes.begin();
217 while (it != sizes.end()) {
218 const float ratio = (float)(*it).width() /
(float)(*it).height();
219 const float EPSILON = 10e-3;
220 if (fabs(ratio - m_aspectRatio) < EPSILON) {
221 return *it;
222 }
223 ++it;
224 }
225 }
226
227 return QSize();
228 }
[1]:
http://developer.android.com/reference/android/hardware/Camera.Parameters.html#getPreviewFpsRange%28int[]%29
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https://bugs.launchpad.net/bugs/1273890
Title:
emulator camera does not take picture
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