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Implement encoder settings in camerabin backend.

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This is not comprehensive since different encoders have different names
and representations for many settings, but it should cover bit rate for
most encoders, and quality and encodingMode for a number of common
encoders.

Change-Id: I0ba4e70c2f234e0deaaa02bdecc0f5198122c1e9
Reviewed-by: Yoann Lopes <yoann.lopes@digia.com>
This commit is contained in:
Andrew den Exter
2014-07-17 06:34:30 +00:00
committed by Yoann Lopes
parent 9c020cd39a
commit 55ce8ed072
6 changed files with 111 additions and 0 deletions
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24
src/plugins/gstreamer/camerabin/camerabinaudioencoder.cpp
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@@ -117,4 +117,28 @@ GstEncodingProfile *CameraBinAudioEncoder::createProfile()
return profile;
}
void CameraBinAudioEncoder::applySettings(GstElement *encoder)
{
GObjectClass * const objectClass = G_OBJECT_GET_CLASS(encoder);
const char * const name = gst_plugin_feature_get_name(
GST_PLUGIN_FEATURE(gst_element_get_factory(encoder)));
const bool isVorbis = qstrcmp(name, "vorbisenc") == 0;
const int bitRate = m_actualAudioSettings.bitRate();
if (!isVorbis && bitRate == -1) {
// Bit rate is invalid, don't evaluate the remaining conditions unless the encoder is
// vorbisenc which is known to accept -1 as an unspecified bitrate.
} else if (g_object_class_find_property(objectClass, "bitrate")) {
g_object_set(G_OBJECT(encoder), "bitrate", bitRate, NULL);
} else if (g_object_class_find_property(objectClass, "target-bitrate")) {
g_object_set(G_OBJECT(encoder), "target-bitrate", bitRate, NULL);
}
if (isVorbis) {
static const double qualities[] = { 0.1, 0.3, 0.5, 0.7, 1.0 };
g_object_set(G_OBJECT(encoder), "quality", qualities[m_actualAudioSettings.quality()], NULL);
}
}
QT_END_NAMESPACE