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/*
* Copyright (C) 2022 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 "GStreamerCodecUtilities.h"
#if USE(GSTREAMER)
#include "HEVCUtilities.h"
#include <gst/pbutils/codec-utils.h>
#include <wtf/text/StringToIntegerConversion.h>
#include <wtf/text/WTFString.h>
GST_DEBUG_CATEGORY(webkit_gst_codec_utilities_debug);
#define GST_CAT_DEFAULT webkit_gst_codec_utilities_debug
namespace WebCore {
static void ensureDebugCategoryInitialized()
{
static std::once_flag debugRegisteredFlag;
std::call_once(debugRegisteredFlag, [] {
GST_DEBUG_CATEGORY_INIT(webkit_gst_codec_utilities_debug, "webkitcodec", 0, "WebKit Codecs Utilities");
});
}
std::pair<const char*, const char*> GStreamerCodecUtilities::parseH264ProfileAndLevel(const String& codec)
{
ensureDebugCategoryInitialized();
auto components = codec.split('.');
long int spsAsInteger = strtol(components[1].utf8().data(), nullptr, 16);
uint8_t sps[3];
sps[0] = spsAsInteger >> 16;
sps[1] = spsAsInteger >> 8;
sps[2] = spsAsInteger;
const char* profile = gst_codec_utils_h264_get_profile(sps, 3);
const char* level = gst_codec_utils_h264_get_level(sps, 3);
// To avoid going through a class hierarchy for such a simple
// string conversion, we use a little trick here: See
// https://bugs.webkit.org/show_bug.cgi?id=201870.
char levelAsStringFallback[2] = { '\0', '\0' };
if (!level && sps[2] > 0 && sps[2] <= 5) {
levelAsStringFallback[0] = static_cast<char>('0' + sps[2]);
level = levelAsStringFallback;
}
GST_DEBUG("Codec %s translates to H.264 profile %s and level %s", codec.utf8().data(), GST_STR_NULL(profile), GST_STR_NULL(level));
return { profile, level };
}
const char* GStreamerCodecUtilities::parseHEVCProfile(const String& codec)
{
ensureDebugCategoryInitialized();
GST_DEBUG("Parsing HEVC codec string: %s", codec.ascii().data());
auto parameters = parseHEVCCodecParameters(codec);
if (!parameters) {
GST_WARNING("Invalid HEVC codec: %s", codec.ascii().data());
return nullptr;
}
uint8_t profileTierLevel[11] = { 0, };
memset(profileTierLevel, 0, 11);
profileTierLevel[0] = parameters->generalProfileIDC;
if (profileTierLevel[0] >= 4) {
auto& constraints = parameters->generalConstraintIndicatorFlags;
for (unsigned i = 5, j = 0; i < 10; i++, j++)
profileTierLevel[i] = constraints[j];
}
return gst_codec_utils_h265_get_profile(profileTierLevel, sizeof(profileTierLevel));
}
uint8_t GStreamerCodecUtilities::parseVP9Profile(const String& codec)
{
ensureDebugCategoryInitialized();
auto components = codec.split('.');
auto profile = parseInteger<uint8_t>(components[1]).value_or(0);
GST_DEBUG("Codec %s translates to VP9 profile %u", codec.utf8().data(), profile);
return profile;
}
#undef GST_CAT_DEFAULT
} // namespace WebCore
#endif // USE(GSTREAMER)
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