Support compiling with GStreamer < 0.10.32 in the camerabin plugin.

The documented minimum GStreamer version for Qt Multimedia is 0.10.24,
however, the camerabin plugin actually required 0.10.32 to compile
successfully. The reason is mainly due to the GstEncodingProfiles
API, which is used to implement the audio and video encoding settings
controls. There's no hard requirement for that API anymore and the
aforementioned controls simply don't do anything when the GStreamer
version used to compile is older than 0.10.32.
A few other GStreamer calls had to be ifdef'd or replaced in order
to compile with 0.10.24.
Note that this patch only makes sure it compiles with older versions,
running the camerabin plugin with GStreamer < 0.10.32 is currently
untested and it might not work as expected.

Task-number: QTBUG-48914
Change-Id: I4ce8e932f24a33e919e29326729e12bbae561faf
Reviewed-by: Christian Stromme <christian.stromme@theqtcompany.com>

src/gsttools/qgstutils.cpp

@@ -44,6 +44,7 @@
 #include <qaudioformat.h>
 #include <QtCore/qelapsedtimer.h>
 #include <QtMultimedia/qvideosurfaceformat.h>
+#include <private/qmultimediautils_p.h>
 
 #include <gst/audio/audio.h>
 #include <gst/video/video.h>
@@ -1531,6 +1532,15 @@ GList *qt_gst_video_sinks()
     return list;
 }
 
+void qt_gst_util_double_to_fraction(gdouble src, gint *dest_n, gint *dest_d)
+{
+#if GST_CHECK_VERSION(0, 10, 26)
+    gst_util_double_to_fraction(src, dest_n, dest_d);
+#else
+    qt_real_to_fraction(src, dest_n, dest_d);
+#endif
+}
+
 QDebug operator <<(QDebug debug, GstCaps *caps)
 {
     if (caps) {

src/multimedia/gsttools_headers/qgstutils_p.h

@@ -152,6 +152,7 @@ GstCaps *qt_gst_caps_normalize(GstCaps *caps);
 const gchar *qt_gst_element_get_factory_name(GstElement *element);
 gboolean qt_gst_caps_can_intersect(const GstCaps * caps1, const GstCaps * caps2);
 GList *qt_gst_video_sinks();
+void qt_gst_util_double_to_fraction(gdouble src, gint *dest_n, gint *dest_d);
 
 QDebug operator <<(QDebug debug, GstCaps *caps);
 

src/plugins/gstreamer/camerabin/camerabin.pro

@@ -85,6 +85,10 @@ config_gstreamer_photography {
     DEFINES += GST_USE_UNSTABLE_API #prevents warnings because of unstable photography API
 }
 
+config_gstreamer_encodingprofiles {
+    DEFINES += HAVE_GST_ENCODING_PROFILES
+}
+
 OTHER_FILES += \
     camerabin.json
 

src/plugins/gstreamer/camerabin/camerabinaudioencoder.cpp

@@ -33,7 +33,6 @@
 
 #include "camerabinaudioencoder.h"
 #include "camerabincontainer.h"
-#include <private/qgstcodecsinfo_p.h>
 #include <private/qgstutils_p.h>
 
 #include <QtCore/qdebug.h>
@@ -41,8 +40,10 @@
 QT_BEGIN_NAMESPACE
 
 CameraBinAudioEncoder::CameraBinAudioEncoder(QObject *parent)
-    :QAudioEncoderSettingsControl(parent),
-     m_codecs(QGstCodecsInfo::AudioEncoder)
+    :QAudioEncoderSettingsControl(parent)
+#ifdef HAVE_GST_ENCODING_PROFILES
+    , m_codecs(QGstCodecsInfo::AudioEncoder)
+#endif
 {
 }
 
@@ -52,12 +53,21 @@ CameraBinAudioEncoder::~CameraBinAudioEncoder()
 
 QStringList CameraBinAudioEncoder::supportedAudioCodecs() const
 {
+#ifdef HAVE_GST_ENCODING_PROFILES
     return m_codecs.supportedCodecs();
+#else
+    return QStringList();
+#endif
 }
 
 QString CameraBinAudioEncoder::codecDescription(const QString &codecName) const
 {
+#ifdef HAVE_GST_ENCODING_PROFILES
     return m_codecs.codecDescription(codecName);
+#else
+    Q_UNUSED(codecName)
+    return QString();
+#endif
 }
 
 QList<int> CameraBinAudioEncoder::supportedSampleRates(const QAudioEncoderSettings &, bool *) const
@@ -96,6 +106,8 @@ void CameraBinAudioEncoder::resetActualSettings()
     m_actualAudioSettings = m_audioSettings;
 }
 
+#ifdef HAVE_GST_ENCODING_PROFILES
+
 GstEncodingProfile *CameraBinAudioEncoder::createProfile()
 {
     QString codec = m_actualAudioSettings.codec();
@@ -118,6 +130,8 @@ GstEncodingProfile *CameraBinAudioEncoder::createProfile()
     return profile;
 }
 
+#endif
+
 void CameraBinAudioEncoder::applySettings(GstElement *encoder)
 {
     GObjectClass * const objectClass = G_OBJECT_GET_CLASS(encoder);

src/plugins/gstreamer/camerabin/camerabinaudioencoder.h

@@ -42,10 +42,13 @@
 
 #include <gst/gst.h>
 #include <gst/pbutils/pbutils.h>
+
+#ifdef HAVE_GST_ENCODING_PROFILES
 #include <gst/pbutils/encoding-profile.h>
+#include <private/qgstcodecsinfo_p.h>
+#endif
 
 #include <qaudioformat.h>
-#include <private/qgstcodecsinfo_p.h>
 
 QT_BEGIN_NAMESPACE
 class CameraBinSession;
@@ -76,7 +79,9 @@ public:
     void setActualAudioSettings(const QAudioEncoderSettings&);
     void resetActualSettings();
 
+#ifdef HAVE_GST_ENCODING_PROFILES
     GstEncodingProfile *createProfile();
+#endif
 
     void applySettings(GstElement *element);
 
@@ -84,7 +89,9 @@ Q_SIGNALS:
     void settingsChanged();
 
 private:
+#ifdef HAVE_GST_ENCODING_PROFILES
     QGstCodecsInfo m_codecs;
+#endif
 
     QAudioEncoderSettings m_actualAudioSettings;
     QAudioEncoderSettings m_audioSettings;

src/plugins/gstreamer/camerabin/camerabincontainer.cpp

@@ -39,8 +39,10 @@
 QT_BEGIN_NAMESPACE
 
 CameraBinContainer::CameraBinContainer(QObject *parent)
-    :QMediaContainerControl(parent),
-      m_supportedContainers(QGstCodecsInfo::Muxer)
+    :QMediaContainerControl(parent)
+#ifdef HAVE_GST_ENCODING_PROFILES
+    , m_supportedContainers(QGstCodecsInfo::Muxer)
+#endif
 {
     //extension for containers hard to guess from mimetype
     m_fileExtensions["video/x-matroska"] = "mkv";
@@ -54,12 +56,21 @@ CameraBinContainer::CameraBinContainer(QObject *parent)
 
 QStringList CameraBinContainer::supportedContainers() const
 {
+#ifdef HAVE_GST_ENCODING_PROFILES
     return m_supportedContainers.supportedCodecs();
+#else
+    return QStringList();
+#endif
 }
 
 QString CameraBinContainer::containerDescription(const QString &formatMimeType) const
 {
+#ifdef HAVE_GST_ENCODING_PROFILES
     return m_supportedContainers.codecDescription(formatMimeType);
+#else
+    Q_UNUSED(formatMimeType)
+    return QString();
+#endif
 }
 
 QString CameraBinContainer::containerFormat() const
@@ -69,11 +80,13 @@ QString CameraBinContainer::containerFormat() const
 
 void CameraBinContainer::setContainerFormat(const QString &format)
 {
+#ifdef HAVE_GST_ENCODING_PROFILES
     if (m_format != format) {
         m_format = format;
         m_actualFormat = format;
         emit settingsChanged();
     }
+#endif
 }
 
 QString CameraBinContainer::actualContainerFormat() const
@@ -83,7 +96,9 @@ QString CameraBinContainer::actualContainerFormat() const
 
 void CameraBinContainer::setActualContainerFormat(const QString &containerFormat)
 {
+#ifdef HAVE_GST_ENCODING_PROFILES
     m_actualFormat = containerFormat;
+#endif
 }
 
 void CameraBinContainer::resetActualContainerFormat()
@@ -91,6 +106,8 @@ void CameraBinContainer::resetActualContainerFormat()
     m_actualFormat = m_format;
 }
 
+#ifdef HAVE_GST_ENCODING_PROFILES
+
 GstEncodingContainerProfile *CameraBinContainer::createProfile()
 {
     GstCaps *caps;
@@ -127,6 +144,8 @@ GstEncodingContainerProfile *CameraBinContainer::createProfile()
     return profile;
 }
 
+#endif
+
 /*!
   Suggest file extension for current container mimetype.
  */

src/plugins/gstreamer/camerabin/camerabincontainer.h

@@ -41,9 +41,11 @@
 
 #include <gst/gst.h>
 #include <gst/pbutils/pbutils.h>
-#include <gst/pbutils/encoding-profile.h>
 
+#ifdef HAVE_GST_ENCODING_PROFILES
+#include <gst/pbutils/encoding-profile.h>
 #include <private/qgstcodecsinfo_p.h>
+#endif
 
 QT_BEGIN_NAMESPACE
 
@@ -66,7 +68,9 @@ public:
 
     QString suggestedFileExtension(const QString &containerFormat) const;
 
+#ifdef HAVE_GST_ENCODING_PROFILES
     GstEncodingContainerProfile *createProfile();
+#endif
 
 Q_SIGNALS:
     void settingsChanged();
@@ -76,7 +80,9 @@ private:
     QString m_actualFormat;
     QMap<QString, QString> m_fileExtensions;
 
+#ifdef HAVE_GST_ENCODING_PROFILES
     QGstCodecsInfo m_supportedContainers;
+#endif
 };
 
 QT_END_NAMESPACE

src/plugins/gstreamer/camerabin/camerabinmetadata.cpp

@@ -42,6 +42,8 @@
 
 QT_BEGIN_NAMESPACE
 
+#if GST_CHECK_VERSION(0,10,30)
+
 static QVariant fromGStreamerOrientation(const QVariant &value)
 {
     // Note gstreamer tokens either describe the counter clockwise rotation of the
@@ -58,6 +60,8 @@ static QVariant fromGStreamerOrientation(const QVariant &value)
         return 0;
 }
 
+#endif
+
 static QVariant toGStreamerOrientation(const QVariant &value)
 {
     switch (value.toInt()) {
@@ -97,7 +101,9 @@ static const QGStreamerMetaDataKeys *qt_gstreamerMetaDataKeys()
         //metadataKeys->append(QGStreamerMetaDataKey(QMediaMetaData::SubTitle, 0, QVariant::String));
         //metadataKeys->append(QGStreamerMetaDataKey(QMediaMetaData::Author, 0, QVariant::String));
         metadataKeys->append(QGStreamerMetaDataKey(QMediaMetaData::Comment, GST_TAG_COMMENT, QVariant::String));
+#if GST_CHECK_VERSION(0,10,31)
         metadataKeys->append(QGStreamerMetaDataKey(QMediaMetaData::Date, GST_TAG_DATE_TIME, QVariant::DateTime));
+#endif
         metadataKeys->append(QGStreamerMetaDataKey(QMediaMetaData::Description, GST_TAG_DESCRIPTION, QVariant::String));
         //metadataKeys->append(QGStreamerMetaDataKey(QMediaMetaData::Category, 0, QVariant::String));
         metadataKeys->append(QGStreamerMetaDataKey(QMediaMetaData::Genre, GST_TAG_GENRE, QVariant::String));
@@ -182,12 +188,14 @@ CameraBinMetaData::CameraBinMetaData(QObject *parent)
 
 QVariant CameraBinMetaData::metaData(const QString &key) const
 {
+#if GST_CHECK_VERSION(0,10,30)
     if (key == QMediaMetaData::Orientation) {
         return fromGStreamerOrientation(m_values.value(QByteArray(GST_TAG_IMAGE_ORIENTATION)));
     } else if (key == QMediaMetaData::GPSSpeed) {
         const double metersPerSec = m_values.value(QByteArray(GST_TAG_GEO_LOCATION_MOVEMENT_SPEED)).toDouble();
         return (metersPerSec * 3600) / 1000;
     }
+#endif
 
     Q_FOREACH (const QGStreamerMetaDataKey &metadataKey, *qt_gstreamerMetaDataKeys()) {
         if (metadataKey.qtName == key)

src/plugins/gstreamer/camerabin/camerabinrecorder.cpp

@@ -39,7 +39,6 @@
 #include "camerabincontainer.h"
 #include <QtCore/QDebug>
 
-#include <gst/pbutils/encoding-profile.h>
 
 QT_BEGIN_NAMESPACE
 
@@ -131,6 +130,7 @@ qint64 CameraBinRecorder::duration() const
 
 void CameraBinRecorder::applySettings()
 {
+#ifdef HAVE_GST_ENCODING_PROFILES
     CameraBinContainer *containerControl = m_session->mediaContainerControl();
     CameraBinAudioEncoder *audioEncoderControl = m_session->audioEncodeControl();
     CameraBinVideoEncoder *videoEncoderControl = m_session->videoEncodeControl();
@@ -172,8 +172,11 @@ void CameraBinRecorder::applySettings()
             }
         }
     }
+#endif
 }
 
+#ifdef HAVE_GST_ENCODING_PROFILES
+
 GstEncodingContainerProfile *CameraBinRecorder::videoProfile()
 {
     GstEncodingContainerProfile *containerProfile = m_session->mediaContainerControl()->createProfile();
@@ -195,6 +198,8 @@ GstEncodingContainerProfile *CameraBinRecorder::videoProfile()
     return containerProfile;
 }
 
+#endif
+
 void CameraBinRecorder::setState(QMediaRecorder::State state)
 {
     if (m_state == state)

src/plugins/gstreamer/camerabin/camerabinrecorder.h

@@ -37,7 +37,10 @@
 
 #include <qmediarecordercontrol.h>
 #include "camerabinsession.h"
+
+#ifdef HAVE_GST_ENCODING_PROFILES
 #include <gst/pbutils/encoding-profile.h>
+#endif
 
 QT_BEGIN_NAMESPACE
 
@@ -61,7 +64,10 @@ public:
     qreal volume() const;
 
     void applySettings();
+
+#ifdef HAVE_GST_ENCODING_PROFILES
     GstEncodingContainerProfile *videoProfile();
+#endif
 
 public slots:
     void setState(QMediaRecorder::State state);

src/plugins/gstreamer/camerabin/camerabinsession.cpp

@@ -308,7 +308,7 @@ static GstCaps *resolutionToCaps(const QSize &resolution,
     if (frameRate > 0.0) {
         gint numerator;
         gint denominator;
-        gst_util_double_to_fraction(frameRate, &numerator, &denominator);
+        qt_gst_util_double_to_fraction(frameRate, &numerator, &denominator);
 
         gst_caps_set_simple(
                     caps,
@@ -404,7 +404,7 @@ void CameraBinSession::setupCaptureResolution()
 
         if (!qFuzzyIsNull(viewfinderFrameRate)) {
             int n, d;
-            gst_util_double_to_fraction(viewfinderFrameRate, &n, &d);
+            qt_gst_util_double_to_fraction(viewfinderFrameRate, &n, &d);
             g_object_set(G_OBJECT(m_videoSrc), "fps-n", n, NULL);
             g_object_set(G_OBJECT(m_videoSrc), "fps-d", d, NULL);
         }
@@ -798,12 +798,14 @@ void CameraBinSession::start()
 
     m_recorderControl->applySettings();
 
+#ifdef HAVE_GST_ENCODING_PROFILES
     GstEncodingContainerProfile *profile = m_recorderControl->videoProfile();
     g_object_set (G_OBJECT(m_camerabin),
                   "video-profile",
                   profile,
                   NULL);
     gst_encoding_profile_unref(profile);
+#endif
 
     setAudioCaptureCaps();
 
@@ -1065,13 +1067,38 @@ bool CameraBinSession::processBusMessage(const QGstreamerMessage &message)
     return false;
 }
 
+QString CameraBinSession::currentContainerFormat() const
+{
+    if (!m_muxer)
+        return QString();
+
+    QString format;
+
+    if (GstPad *srcPad = gst_element_get_static_pad(m_muxer, "src")) {
+        if (GstCaps *caps = qt_gst_pad_get_caps(srcPad)) {
+            gchar *capsString = gst_caps_to_string(caps);
+            format = QString::fromLatin1(capsString);
+            if (capsString)
+                g_free(capsString);
+            gst_caps_unref(caps);
+        }
+        gst_object_unref(GST_OBJECT(srcPad));
+    }
+
+    return format;
+}
+
 void CameraBinSession::recordVideo()
 {
+    QString format = currentContainerFormat();
+    if (format.isEmpty())
+        format = m_mediaContainerControl->actualContainerFormat();
+
     const QString actualFileName = m_mediaStorageLocation.generateFileName(m_sink.isLocalFile() ? m_sink.toLocalFile()
                                                                                                 : m_sink.toString(),
                                       QMediaStorageLocation::Movies,
                                       QLatin1String("clip_"),
-                                      m_mediaContainerControl->suggestedFileExtension(m_mediaContainerControl->actualContainerFormat()));
+                                      m_mediaContainerControl->suggestedFileExtension(format));
 
     m_recordingActive = true;
     m_actualSink = QUrl::fromLocalFile(actualFileName);
@@ -1433,14 +1460,28 @@ void CameraBinSession::elementAdded(GstBin *, GstElement *element, CameraBinSess
         g_signal_connect(G_OBJECT(element), "element-removed",  G_CALLBACK(elementRemoved), session);
     } else if (!factory) {
         // no-op
+#if GST_CHECK_VERSION(0,10,31)
     } else if (gst_element_factory_list_is_type(factory, GST_ELEMENT_FACTORY_TYPE_AUDIO_ENCODER)) {
+#else
+    } else if (strstr(gst_element_factory_get_klass(factory), "Encoder/Audio") != NULL) {
+#endif
         session->m_audioEncoder = element;
 
         session->m_audioEncodeControl->applySettings(element);
+#if GST_CHECK_VERSION(0,10,31)
     } else if (gst_element_factory_list_is_type(factory, GST_ELEMENT_FACTORY_TYPE_VIDEO_ENCODER)) {
+#else
+    } else if (strstr(gst_element_factory_get_klass(factory), "Encoder/Video") != NULL) {
+#endif
         session->m_videoEncoder = element;
 
         session->m_videoEncodeControl->applySettings(element);
+#if GST_CHECK_VERSION(0,10,31)
+    } else if (gst_element_factory_list_is_type(factory, GST_ELEMENT_FACTORY_TYPE_MUXER)) {
+#else
+    } else if (strstr(gst_element_factory_get_klass(factory), "Muxer") != NULL) {
+#endif
+        session->m_muxer = element;
     }
 }
 
@@ -1450,6 +1491,8 @@ void CameraBinSession::elementRemoved(GstBin *, GstElement *element, CameraBinSe
         session->m_audioEncoder = 0;
     else if (element == session->m_videoEncoder)
         session->m_videoEncoder = 0;
+    else if (element == session->m_muxer)
+        session->m_muxer = 0;
 }
 
 QT_END_NAMESPACE

src/plugins/gstreamer/camerabin/camerabinsession.h

@@ -195,6 +195,8 @@ private:
     void updateSupportedViewfinderSettings();
     static void updateBusyStatus(GObject *o, GParamSpec *p, gpointer d);
 
+    QString currentContainerFormat() const;
+
     static void elementAdded(GstBin *bin, GstElement *element, CameraBinSession *session);
     static void elementRemoved(GstBin *bin, GstElement *element, CameraBinSession *session);
 

src/plugins/gstreamer/camerabin/camerabinvideoencoder.cpp

@@ -41,9 +41,11 @@
 QT_BEGIN_NAMESPACE
 
 CameraBinVideoEncoder::CameraBinVideoEncoder(CameraBinSession *session)
-    :QVideoEncoderSettingsControl(session),
-     m_session(session),
-     m_codecs(QGstCodecsInfo::VideoEncoder)
+    :QVideoEncoderSettingsControl(session)
+    , m_session(session)
+#ifdef HAVE_GST_ENCODING_PROFILES
+    , m_codecs(QGstCodecsInfo::VideoEncoder)
+#endif
 {
 }
 
@@ -81,12 +83,21 @@ QList< qreal > CameraBinVideoEncoder::supportedFrameRates(const QVideoEncoderSet
 
 QStringList CameraBinVideoEncoder::supportedVideoCodecs() const
 {
+#ifdef HAVE_GST_ENCODING_PROFILES
     return m_codecs.supportedCodecs();
+#else
+    return QStringList();
+#endif
 }
 
 QString CameraBinVideoEncoder::videoCodecDescription(const QString &codecName) const
 {
+#ifdef HAVE_GST_ENCODING_PROFILES
     return m_codecs.codecDescription(codecName);
+#else
+    Q_UNUSED(codecName)
+    return QString();
+#endif
 }
 
 QVideoEncoderSettings CameraBinVideoEncoder::videoSettings() const
@@ -150,6 +161,8 @@ QPair<int,int> CameraBinVideoEncoder::rateAsRational(qreal frameRate) const
     return QPair<int,int>();
 }
 
+#ifdef HAVE_GST_ENCODING_PROFILES
+
 GstEncodingProfile *CameraBinVideoEncoder::createProfile()
 {
     QString codec = m_actualVideoSettings.codec();
@@ -176,6 +189,8 @@ GstEncodingProfile *CameraBinVideoEncoder::createProfile()
     return (GstEncodingProfile *)profile;
 }
 
+#endif
+
 void CameraBinVideoEncoder::applySettings(GstElement *encoder)
 {
     GObjectClass * const objectClass = G_OBJECT_GET_CLASS(encoder);

src/plugins/gstreamer/camerabin/camerabinvideoencoder.h

@@ -42,8 +42,11 @@
 
 #include <gst/gst.h>
 #include <gst/pbutils/pbutils.h>
+
+#ifdef HAVE_GST_ENCODING_PROFILES
 #include <gst/pbutils/encoding-profile.h>
 #include <private/qgstcodecsinfo_p.h>
+#endif
 
 QT_BEGIN_NAMESPACE
 
@@ -74,7 +77,9 @@ public:
     void setActualVideoSettings(const QVideoEncoderSettings&);
     void resetActualSettings();
 
+#ifdef HAVE_GST_ENCODING_PROFILES
     GstEncodingProfile *createProfile();
+#endif
 
     void applySettings(GstElement *encoder);
 
@@ -84,7 +89,9 @@ Q_SIGNALS:
 private:
     CameraBinSession *m_session;
 
+#ifdef HAVE_GST_ENCODING_PROFILES
     QGstCodecsInfo m_codecs;
+#endif
 
     QVideoEncoderSettings m_actualVideoSettings;
     QVideoEncoderSettings m_videoSettings;

src/plugins/gstreamer/gstreamer.pro

@@ -2,12 +2,9 @@ TEMPLATE = subdirs
 
 SUBDIRS += \
     audiodecoder \
+    camerabin \
     mediaplayer \
     mediacapture
 
-config_gstreamer_encodingprofiles {
-    SUBDIRS += camerabin
-}
-
 OTHER_FILES += \
     gstreamer.json