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/*
* Copyright (C) 2016 Metrological Group B.V.
* Copyright (C) 2016 Igalia S.L
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Library General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Library General Public License for more details.
*
* You should have received a copy of the GNU Library General Public License
* aint with this library; see the file COPYING.LIB. If not, write to
* the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
* Boston, MA 02110-1301, USA.
*/
#include "config.h"
#include "GStreamerMediaSample.h"
#include "GStreamerUtilities.h"
#if ENABLE(VIDEO) && USE(GSTREAMER) && ENABLE(MEDIA_SOURCE)
namespace WebCore {
GStreamerMediaSample::GStreamerMediaSample(GstSample* sample, const FloatSize& presentationSize, const AtomicString& trackId)
: MediaSample()
, m_pts(MediaTime::zeroTime())
, m_dts(MediaTime::zeroTime())
, m_duration(MediaTime::zeroTime())
, m_trackId(trackId)
, m_size(0)
, m_presentationSize(presentationSize)
, m_flags(MediaSample::IsSync)
{
if (!sample)
return;
GstBuffer* buffer = gst_sample_get_buffer(sample);
if (!buffer)
return;
auto createMediaTime =
[](GstClockTime time) -> MediaTime {
return MediaTime(GST_TIME_AS_USECONDS(time), G_USEC_PER_SEC);
};
if (GST_BUFFER_PTS_IS_VALID(buffer))
m_pts = createMediaTime(GST_BUFFER_PTS(buffer));
if (GST_BUFFER_DTS_IS_VALID(buffer))
m_dts = createMediaTime(GST_BUFFER_DTS(buffer));
if (GST_BUFFER_DURATION_IS_VALID(buffer))
m_duration = createMediaTime(GST_BUFFER_DURATION(buffer));
m_size = gst_buffer_get_size(buffer);
m_sample = sample;
if (GST_BUFFER_FLAG_IS_SET(buffer, GST_BUFFER_FLAG_DELTA_UNIT))
m_flags = MediaSample::None;
if (GST_BUFFER_FLAG_IS_SET(buffer, GST_BUFFER_FLAG_DECODE_ONLY))
m_flags = static_cast<MediaSample::SampleFlags>(m_flags | MediaSample::IsNonDisplaying);
}
Ref<GStreamerMediaSample> GStreamerMediaSample::createFakeSample(GstCaps*, MediaTime pts, MediaTime dts, MediaTime duration, const FloatSize& presentationSize, const AtomicString& trackId)
{
GStreamerMediaSample* gstreamerMediaSample = new GStreamerMediaSample(nullptr, presentationSize, trackId);
gstreamerMediaSample->m_pts = pts;
gstreamerMediaSample->m_dts = dts;
gstreamerMediaSample->m_duration = duration;
gstreamerMediaSample->m_flags = MediaSample::IsNonDisplaying;
return adoptRef(*gstreamerMediaSample);
}
void GStreamerMediaSample::applyPtsOffset(MediaTime timestampOffset)
{
if (m_pts > timestampOffset) {
m_duration = m_duration + (m_pts - timestampOffset);
m_pts = timestampOffset;
}
}
void GStreamerMediaSample::offsetTimestampsBy(const MediaTime& timestampOffset)
{
if (!timestampOffset)
return;
m_pts += timestampOffset;
m_dts += timestampOffset;
GstBuffer* buffer = gst_sample_get_buffer(m_sample.get());
if (buffer) {
GST_BUFFER_PTS(buffer) = toGstClockTime(m_pts.toFloat());
GST_BUFFER_DTS(buffer) = toGstClockTime(m_dts.toFloat());
}
}
Ref<MediaSample> GStreamerMediaSample::createNonDisplayingCopy() const
{
if (!m_sample)
return createFakeSample(nullptr, m_pts, m_dts, m_duration, m_presentationSize, m_trackId);
GstBuffer* buffer = gst_sample_get_buffer(m_sample.get());
GST_BUFFER_FLAG_SET(buffer, GST_BUFFER_FLAG_DECODE_ONLY);
GstCaps* caps = gst_sample_get_caps(m_sample.get());
GstSegment* segment = gst_sample_get_segment(m_sample.get());
const GstStructure* originalInfo = gst_sample_get_info(m_sample.get());
GstStructure* info = originalInfo ? gst_structure_copy(originalInfo) : nullptr;
GRefPtr<GstSample> sample = adoptGRef(gst_sample_new(buffer, caps, segment, info));
return adoptRef(*new GStreamerMediaSample(sample.get(), m_presentationSize, m_trackId));
}
} // namespace WebCore.
#endif // USE(GSTREAMER)
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