An error occurred while loading the file. Please try again.
-
J-P Nurmi authored
Add docs, sync API with TextInput, remove unused properties Change-Id: I1d497086660e22cdeb92255d194d0a702c3e45ec Reviewed-by:Gabriel de Dietrich <gabriel.dedietrich@digia.com>
84ed1ac2
qgstutils.cpp 18.64 KiB
/******************************************************************************** Copyright (C) 2014 Digia Plc and/or its subsidiary(-ies).** Contact: http://www.qt-project.org/legal**** This file is part of the Qt Toolkit.**** $QT_BEGIN_LICENSE:LGPL21$** Commercial License Usage** Licensees holding valid commercial Qt licenses may use this file in** accordance with the commercial license agreement provided with the** Software or, alternatively, in accordance with the terms contained in** a written agreement between you and Digia. For licensing terms and** conditions see http://qt.digia.com/licensing. For further information** use the contact form at http://qt.digia.com/contact-us.**** GNU Lesser General Public License Usage** Alternatively, this file may be used under the terms of the GNU Lesser** General Public License version 2.1 or version 3 as published by the Free** Software Foundation and appearing in the file LICENSE.LGPLv21 and** LICENSE.LGPLv3 included in the packaging of this file. Please review the** following information to ensure the GNU Lesser General Public License** requirements will be met: https://www.gnu.org/licenses/lgpl.html and** http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.**** In addition, as a special exception, Digia gives you certain additional** rights. These rights are described in the Digia Qt LGPL Exception** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.**** $QT_END_LICENSE$******************************************************************************/#include "qgstutils_p.h"#include <QtCore/qdatetime.h>#include <QtCore/qdir.h>#include <QtCore/qbytearray.h>#include <QtCore/qvariant.h>#include <QtCore/qsize.h>#include <QtCore/qset.h>#include <QtCore/qstringlist.h>#include <qaudioformat.h>#ifdef USE_V4L# include <private/qcore_unix_p.h># include <linux/videodev2.h>#endif#include "qgstreamervideoinputdevicecontrol_p.h"QT_BEGIN_NAMESPACE//internalstatic void addTagToMap(const GstTagList *list, const gchar *tag, gpointer user_data){ QMap<QByteArray, QVariant> *map = reinterpret_cast<QMap<QByteArray, QVariant>* >(user_data); GValue val; val.g_type = 0; gst_tag_list_copy_value(&val,list,tag); switch( G_VALUE_TYPE(&val) ) { case G_TYPE_STRING: { const gchar *str_value = g_value_get_string(&val); map->insert(QByteArray(tag), QString::fromUtf8(str_value)); break;7172737475767778798081828384858687888990919293949596979899100101102103104105106107108109110111112113114115116117118119120121122123124125126127128129130131132133134135136137138139140
}
case G_TYPE_INT:
map->insert(QByteArray(tag), g_value_get_int(&val));
break;
case G_TYPE_UINT:
map->insert(QByteArray(tag), g_value_get_uint(&val));
break;
case G_TYPE_LONG:
map->insert(QByteArray(tag), qint64(g_value_get_long(&val)));
break;
case G_TYPE_BOOLEAN:
map->insert(QByteArray(tag), g_value_get_boolean(&val));
break;
case G_TYPE_CHAR:
map->insert(QByteArray(tag), g_value_get_char(&val));
break;
case G_TYPE_DOUBLE:
map->insert(QByteArray(tag), g_value_get_double(&val));
break;
default:
// GST_TYPE_DATE is a function, not a constant, so pull it out of the switch
if (G_VALUE_TYPE(&val) == GST_TYPE_DATE) {
const GDate *date = gst_value_get_date(&val);
if (g_date_valid(date)) {
int year = g_date_get_year(date);
int month = g_date_get_month(date);
int day = g_date_get_day(date);
map->insert(QByteArray(tag), QDate(year,month,day));
if (!map->contains("year"))
map->insert("year", year);
}
} else if (G_VALUE_TYPE(&val) == GST_TYPE_FRACTION) {
int nom = gst_value_get_fraction_numerator(&val);
int denom = gst_value_get_fraction_denominator(&val);
if (denom > 0) {
map->insert(QByteArray(tag), double(nom)/denom);
}
}
break;
}
g_value_unset(&val);
}
/*!
Convert GstTagList structure to QMap<QByteArray, QVariant>.
Mapping to int, bool, char, string, fractions and date are supported.
Fraction values are converted to doubles.
*/
QMap<QByteArray, QVariant> QGstUtils::gstTagListToMap(const GstTagList *tags)
{
QMap<QByteArray, QVariant> res;
gst_tag_list_foreach(tags, addTagToMap, &res);
return res;
}
/*!
Returns resolution of \a caps.
If caps doesn't have a valid size, and ampty QSize is returned.
*/
QSize QGstUtils::capsResolution(const GstCaps *caps)
{
QSize size;
if (caps) {
const GstStructure *structure = gst_caps_get_structure(caps, 0);
gst_structure_get_int(structure, "width", &size.rwidth());
141142143144145146147148149150151152153154155156157158159160161162163164165166167168169170171172173174175176177178179180181182183184185186187188189190191192193194195196197198199200201202203204205206207208209210
gst_structure_get_int(structure, "height", &size.rheight());
}
return size;
}
/*!
Returns aspect ratio corrected resolution of \a caps.
If caps doesn't have a valid size, an empty QSize is returned.
*/
QSize QGstUtils::capsCorrectedResolution(const GstCaps *caps)
{
QSize size;
if (caps) {
const GstStructure *structure = gst_caps_get_structure(caps, 0);
gst_structure_get_int(structure, "width", &size.rwidth());
gst_structure_get_int(structure, "height", &size.rheight());
gint aspectNum = 0;
gint aspectDenum = 0;
if (!size.isEmpty() && gst_structure_get_fraction(
structure, "pixel-aspect-ratio", &aspectNum, &aspectDenum)) {
if (aspectDenum > 0)
size.setWidth(size.width()*aspectNum/aspectDenum);
}
}
return size;
}
/*!
Returns audio format for caps.
If caps doesn't have a valid audio format, an empty QAudioFormat is returned.
*/
QAudioFormat QGstUtils::audioFormatForCaps(const GstCaps *caps)
{
const GstStructure *structure = gst_caps_get_structure(caps, 0);
QAudioFormat format;
if (qstrcmp(gst_structure_get_name(structure), "audio/x-raw-int") == 0) {
format.setCodec("audio/pcm");
int endianness = 0;
gst_structure_get_int(structure, "endianness", &endianness);
if (endianness == 1234)
format.setByteOrder(QAudioFormat::LittleEndian);
else if (endianness == 4321)
format.setByteOrder(QAudioFormat::BigEndian);
gboolean isSigned = FALSE;
gst_structure_get_boolean(structure, "signed", &isSigned);
if (isSigned)
format.setSampleType(QAudioFormat::SignedInt);
else
format.setSampleType(QAudioFormat::UnSignedInt);
// Number of bits allocated per sample.
int width = 0;
gst_structure_get_int(structure, "width", &width);
// The number of bits used per sample. This must be less than or equal to the width.
int depth = 0;
gst_structure_get_int(structure, "depth", &depth);
if (width != depth) {
// Unsupported sample layout.
211212213214215216217218219220221222223224225226227228229230231232233234235236237238239240241242243244245246247248249250251252253254255256257258259260261262263264265266267268269270271272273274275276277278279280
return QAudioFormat();
}
format.setSampleSize(width);
int rate = 0;
gst_structure_get_int(structure, "rate", &rate);
format.setSampleRate(rate);
int channels = 0;
gst_structure_get_int(structure, "channels", &channels);
format.setChannelCount(channels);
} else if (qstrcmp(gst_structure_get_name(structure), "audio/x-raw-float") == 0) {
format.setCodec("audio/pcm");
int endianness = 0;
gst_structure_get_int(structure, "endianness", &endianness);
if (endianness == 1234)
format.setByteOrder(QAudioFormat::LittleEndian);
else if (endianness == 4321)
format.setByteOrder(QAudioFormat::BigEndian);
format.setSampleType(QAudioFormat::Float);
int width = 0;
gst_structure_get_int(structure, "width", &width);
format.setSampleSize(width);
int rate = 0;
gst_structure_get_int(structure, "rate", &rate);
format.setSampleRate(rate);
int channels = 0;
gst_structure_get_int(structure, "channels", &channels);
format.setChannelCount(channels);
} else {
return QAudioFormat();
}
return format;
}
/*!
Returns audio format for a buffer.
If the buffer doesn't have a valid audio format, an empty QAudioFormat is returned.
*/
QAudioFormat QGstUtils::audioFormatForBuffer(GstBuffer *buffer)
{
GstCaps* caps = gst_buffer_get_caps(buffer);
if (!caps)
return QAudioFormat();
QAudioFormat format = QGstUtils::audioFormatForCaps(caps);
gst_caps_unref(caps);
return format;
}
/*!
Builds GstCaps for an audio format.
Returns 0 if the audio format is not valid.
Caller must unref GstCaps.
*/
GstCaps *QGstUtils::capsForAudioFormat(QAudioFormat format)
281282283284285286287288289290291292293294295296297298299300301302303304305306307308309310311312313314315316317318319320321322323324325326327328329330331332333334335336337338339340341342343344345346347348349350
{
GstStructure *structure = 0;
if (format.isValid()) {
if (format.sampleType() == QAudioFormat::SignedInt || format.sampleType() == QAudioFormat::UnSignedInt) {
structure = gst_structure_new("audio/x-raw-int", NULL);
} else if (format.sampleType() == QAudioFormat::Float) {
structure = gst_structure_new("audio/x-raw-float", NULL);
}
}
GstCaps *caps = 0;
if (structure) {
gst_structure_set(structure, "rate", G_TYPE_INT, format.sampleRate(), NULL);
gst_structure_set(structure, "channels", G_TYPE_INT, format.channelCount(), NULL);
gst_structure_set(structure, "width", G_TYPE_INT, format.sampleSize(), NULL);
gst_structure_set(structure, "depth", G_TYPE_INT, format.sampleSize(), NULL);
if (format.byteOrder() == QAudioFormat::LittleEndian)
gst_structure_set(structure, "endianness", G_TYPE_INT, 1234, NULL);
else if (format.byteOrder() == QAudioFormat::BigEndian)
gst_structure_set(structure, "endianness", G_TYPE_INT, 4321, NULL);
if (format.sampleType() == QAudioFormat::SignedInt)
gst_structure_set(structure, "signed", G_TYPE_BOOLEAN, TRUE, NULL);
else if (format.sampleType() == QAudioFormat::UnSignedInt)
gst_structure_set(structure, "signed", G_TYPE_BOOLEAN, FALSE, NULL);
caps = gst_caps_new_empty();
Q_ASSERT(caps);
gst_caps_append_structure(caps, structure);
}
return caps;
}
void QGstUtils::initializeGst()
{
static bool initialized = false;
if (!initialized) {
initialized = true;
gst_init(NULL, NULL);
}
}
namespace {
const char* getCodecAlias(const QString &codec)
{
if (codec.startsWith("avc1."))
return "video/x-h264";
if (codec.startsWith("mp4a."))
return "audio/mpeg4";
if (codec.startsWith("mp4v.20."))
return "video/mpeg4";
if (codec == "samr")
return "audio/amr";
return 0;
}
const char* getMimeTypeAlias(const QString &mimeType)
{
if (mimeType == "video/mp4")
return "video/mpeg4";
if (mimeType == "audio/mp4")
351352353354355356357358359360361362363364365366367368369370371372373374375376377378379380381382383384385386387388389390391392393394395396397398399400401402403404405406407408409410411412413414415416417418419420
return "audio/mpeg4";
if (mimeType == "video/ogg"
|| mimeType == "audio/ogg")
return "application/ogg";
return 0;
}
}
QMultimedia::SupportEstimate QGstUtils::hasSupport(const QString &mimeType,
const QStringList &codecs,
const QSet<QString> &supportedMimeTypeSet)
{
if (supportedMimeTypeSet.isEmpty())
return QMultimedia::NotSupported;
QString mimeTypeLowcase = mimeType.toLower();
bool containsMimeType = supportedMimeTypeSet.contains(mimeTypeLowcase);
if (!containsMimeType) {
const char* mimeTypeAlias = getMimeTypeAlias(mimeTypeLowcase);
containsMimeType = supportedMimeTypeSet.contains(mimeTypeAlias);
if (!containsMimeType) {
containsMimeType = supportedMimeTypeSet.contains("video/" + mimeTypeLowcase)
|| supportedMimeTypeSet.contains("video/x-" + mimeTypeLowcase)
|| supportedMimeTypeSet.contains("audio/" + mimeTypeLowcase)
|| supportedMimeTypeSet.contains("audio/x-" + mimeTypeLowcase);
}
}
int supportedCodecCount = 0;
foreach (const QString &codec, codecs) {
QString codecLowcase = codec.toLower();
const char* codecAlias = getCodecAlias(codecLowcase);
if (codecAlias) {
if (supportedMimeTypeSet.contains(codecAlias))
supportedCodecCount++;
} else if (supportedMimeTypeSet.contains("video/" + codecLowcase)
|| supportedMimeTypeSet.contains("video/x-" + codecLowcase)
|| supportedMimeTypeSet.contains("audio/" + codecLowcase)
|| supportedMimeTypeSet.contains("audio/x-" + codecLowcase)) {
supportedCodecCount++;
}
}
if (supportedCodecCount > 0 && supportedCodecCount == codecs.size())
return QMultimedia::ProbablySupported;
if (supportedCodecCount == 0 && !containsMimeType)
return QMultimedia::NotSupported;
return QMultimedia::MaybeSupported;
}
namespace {
typedef QHash<GstElementFactory *, QVector<QGstUtils::CameraInfo> > FactoryCameraInfoMap;
Q_GLOBAL_STATIC(FactoryCameraInfoMap, qt_camera_device_info);
}
QVector<QGstUtils::CameraInfo> QGstUtils::enumerateCameras(GstElementFactory *factory)
{
FactoryCameraInfoMap::const_iterator it = qt_camera_device_info()->constFind(factory);
if (it != qt_camera_device_info()->constEnd())
return *it;
QVector<CameraInfo> &devices = (*qt_camera_device_info())[factory];
if (factory) {
421422423424425426427428429430431432433434435436437438439440441442443444445446447448449450451452453454455456457458459460461462463464465466467468469470471472473474475476477478479480481482483484485486487488489490
bool hasVideoSource = false;
const GType type = gst_element_factory_get_element_type(factory);
GObjectClass * const objectClass = type
? static_cast<GObjectClass *>(g_type_class_ref(type))
: 0;
if (objectClass) {
if (g_object_class_find_property(objectClass, "camera-device")) {
const CameraInfo primary = {
QStringLiteral("primary"),
QGstreamerVideoInputDeviceControl::primaryCamera(),
0,
QCamera::BackFace
};
const CameraInfo secondary = {
QStringLiteral("secondary"),
QGstreamerVideoInputDeviceControl::secondaryCamera(),
0,
QCamera::FrontFace
};
devices.append(primary);
devices.append(secondary);
GstElement *camera = g_object_class_find_property(objectClass, "sensor-mount-angle")
? gst_element_factory_create(factory, 0)
: 0;
if (camera) {
if (gst_element_set_state(camera, GST_STATE_READY) != GST_STATE_CHANGE_SUCCESS) {
// no-op
} else for (int i = 0; i < 2; ++i) {
gint orientation = 0;
g_object_set(G_OBJECT(camera), "camera-device", i, NULL);
g_object_get(G_OBJECT(camera), "sensor-mount-angle", &orientation, NULL);
devices[i].orientation = (720 - orientation) % 360;
}
gst_element_set_state(camera, GST_STATE_NULL);
gst_object_unref(GST_OBJECT(camera));
}
} else if (g_object_class_find_property(objectClass, "video-source")) {
hasVideoSource = true;
}
g_type_class_unref(objectClass);
}
if (!devices.isEmpty() || !hasVideoSource) {
return devices;
}
}
#ifdef USE_V4L
QDir devDir(QStringLiteral("/dev"));
devDir.setFilter(QDir::System);
QFileInfoList entries = devDir.entryInfoList(QStringList()
<< QStringLiteral("video*"));
foreach (const QFileInfo &entryInfo, entries) {
//qDebug() << "Try" << entryInfo.filePath();
int fd = qt_safe_open(entryInfo.filePath().toLatin1().constData(), O_RDWR );
if (fd == -1)
continue;
bool isCamera = false;
v4l2_input input;
491492493494495496497498499500501502503504505506507508509510511512513514515516517518519520521522523524525526527528529530531532533534535536537538539540541542543544545546547548549550551552553554555556557558559560
memset(&input, 0, sizeof(input));
for (; ::ioctl(fd, VIDIOC_ENUMINPUT, &input) >= 0; ++input.index) {
if (input.type == V4L2_INPUT_TYPE_CAMERA || input.type == 0) {
isCamera = ::ioctl(fd, VIDIOC_S_INPUT, input.index) != 0;
break;
}
}
if (isCamera) {
// find out its driver "name"
QString name;
struct v4l2_capability vcap;
memset(&vcap, 0, sizeof(struct v4l2_capability));
if (ioctl(fd, VIDIOC_QUERYCAP, &vcap) != 0)
name = entryInfo.fileName();
else
name = QString::fromUtf8((const char*)vcap.card);
//qDebug() << "found camera: " << name;
CameraInfo device = {
entryInfo.absoluteFilePath(),
name,
0,
QCamera::UnspecifiedPosition
};
devices.append(device);
}
qt_safe_close(fd);
}
#endif // USE_V4L
return devices;
}
QList<QByteArray> QGstUtils::cameraDevices(GstElementFactory * factory)
{
QList<QByteArray> devices;
foreach (const CameraInfo &camera, enumerateCameras(factory))
devices.append(camera.name.toUtf8());
return devices;
}
QString QGstUtils::cameraDescription(const QString &device, GstElementFactory * factory)
{
foreach (const CameraInfo &camera, enumerateCameras(factory)) {
if (camera.name == device)
return camera.description;
}
return QString();
}
QCamera::Position QGstUtils::cameraPosition(const QString &device, GstElementFactory * factory)
{
foreach (const CameraInfo &camera, enumerateCameras(factory)) {
if (camera.name == device)
return camera.position;
}
return QCamera::UnspecifiedPosition;
}
int QGstUtils::cameraOrientation(const QString &device, GstElementFactory * factory)
{
foreach (const CameraInfo &camera, enumerateCameras(factory)) {
if (camera.name == device)
return camera.orientation;
}
561562563564565566567568569570571572573574575576577578579580581582583584
return 0;
}
void qt_gst_object_ref_sink(gpointer object)
{
#if (GST_VERSION_MAJOR >= 0) && (GST_VERSION_MINOR >= 10) && (GST_VERSION_MICRO >= 24)
gst_object_ref_sink(object);
#else
g_return_if_fail (GST_IS_OBJECT(object));
GST_OBJECT_LOCK(object);
if (G_LIKELY(GST_OBJECT_IS_FLOATING(object))) {
GST_OBJECT_FLAG_UNSET(object, GST_OBJECT_FLOATING);
GST_OBJECT_UNLOCK(object);
} else {
GST_OBJECT_UNLOCK(object);
gst_object_ref(object);
}
#endif
}
QT_END_NAMESPACE