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GStreamer backend changes for media probing API.

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QGstreamerPlayerSession: Using GStreamer buffer probes
to access media data.

Change-Id: Ibc056283fdedaebba90456cc4e86ab63eae5f5f7
Reviewed-by: Michael Goddard <michael.goddard@nokia.com>
This commit is contained in:
Lev Zelenskiy
2012-02-09 16:50:30 +10:00
committed by Qt by Nokia
parent 4f38f950b0
commit 0374f0de5e
13 changed files with 777 additions and 24 deletions
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87
src/gsttools/qgstutils.cpp
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@@ -45,6 +45,7 @@
#include <QtCore/qbytearray.h>
#include <QtCore/qvariant.h>
#include <QtCore/qsize.h>
#include <qaudioformat.h>
QT_BEGIN_NAMESPACE
@@ -143,7 +144,7 @@ QSize QGstUtils::capsResolution(const GstCaps *caps)
/*!
Returns aspect ratio corrected resolution of \a caps.
If caps doesn't have a valid size, and ampty QSize is returned.
If caps doesn't have a valid size, an empty QSize is returned.
*/
QSize QGstUtils::capsCorrectedResolution(const GstCaps *caps)
{
@@ -166,4 +167,88 @@ QSize QGstUtils::capsCorrectedResolution(const GstCaps *caps)
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.
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;
}
QT_END_NAMESPACE