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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 "GStreamerMediaDescription.h"
#include "GStreamerCommon.h"
#include <gst/pbutils/pbutils.h>
#include <wtf/text/AtomString.h>
#include <wtf/text/WTFString.h>
#if ENABLE(VIDEO) && USE(GSTREAMER) && ENABLE(MEDIA_SOURCE)
namespace WebCore {
AtomString GStreamerMediaDescription::codec() const
{
return m_codecName;
}
bool GStreamerMediaDescription::isVideo() const
{
return doCapsHaveType(m_caps.get(), GST_VIDEO_CAPS_TYPE_PREFIX);
}
bool GStreamerMediaDescription::isAudio() const
{
return doCapsHaveType(m_caps.get(), GST_AUDIO_CAPS_TYPE_PREFIX);
}
bool GStreamerMediaDescription::isText() const
{
// FIXME: Implement proper text track support.
return false;
}
AtomString GStreamerMediaDescription::extractCodecName()
{
GRefPtr<GstCaps> originalCaps = m_caps;
if (areEncryptedCaps(originalCaps.get())) {
originalCaps = adoptGRef(gst_caps_copy(originalCaps.get()));
GstStructure* structure = gst_caps_get_structure(originalCaps.get(), 0);
if (!gst_structure_has_field(structure, "original-media-type"))
return AtomString();
gst_structure_set_name(structure, gst_structure_get_string(structure, "original-media-type"));
// Remove the DRM related fields from the caps.
for (int j = 0; j < gst_structure_n_fields(structure); ++j) {
const char* fieldName = gst_structure_nth_field_name(structure, j);
if (g_str_has_prefix(fieldName, "protection-system")
|| g_str_has_prefix(fieldName, "original-media-type"))
gst_structure_remove_field(structure, fieldName);
}
}
GUniquePtr<gchar> description(gst_pb_utils_get_codec_description(originalCaps.get()));
auto codecName = AtomString::fromLatin1(description.get());
// Report "H.264 (Main Profile)" and "H.264 (High Profile)" just as "H.264" to allow changes between both variants
// go unnoticed to the SourceBuffer layer.
if (codecName.startsWith("H.264"_s)) {
size_t braceStart = codecName.find(" ("_s);
size_t braceEnd = codecName.find(')', braceStart + 1);
if (braceStart != notFound && braceEnd != notFound) {
StringView codecNameView { codecName };
codecName = makeAtomString(codecNameView.left(braceStart), codecNameView.substring(braceEnd + 1));
}
}
return codecName;
}
} // namespace WebCore.
#endif // USE(GSTREAMER)
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