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// Copyright (C) 2024 The Qt Company Ltd.
// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR LGPL-3.0-only OR GPL-2.0-only OR GPL-3.0-only
#include "qffmpegaudioencoderutils_p.h"
#include "qalgorithms.h"
QT_BEGIN_NAMESPACE
namespace QFFmpeg {
AVSampleFormat adjustSampleFormat(const AVSampleFormat *supportedFormats, AVSampleFormat requested)
{
auto calcScore = [requested](AVSampleFormat format) {
return format == requested ? BestAVScore
: format == av_get_planar_sample_fmt(requested) ? BestAVScore - 1
: 0;
};
const auto result = findBestAVFormat(supportedFormats, calcScore).first;
return result == AV_SAMPLE_FMT_NONE ? requested : result;
}
int adjustSampleRate(const int *supportedRates, int requested)
{
auto calcScore = [requested](int rate) {
return requested == rate ? BestAVScore
: requested <= rate ? rate - requested
: requested - rate - 1000000;
};
const auto result = findBestAVValue(supportedRates, calcScore).first;
return result == 0 ? requested : result;
}
static AVScore calculateScoreByChannelsCount(int supportedChannelsNumber,
int requestedChannelsNumber)
{
if (supportedChannelsNumber >= requestedChannelsNumber)
return requestedChannelsNumber - supportedChannelsNumber;
return supportedChannelsNumber - requestedChannelsNumber - 10000;
}
static AVScore calculateScoreByChannelsMask(int supportedChannelsNumber, uint64_t supportedMask,
int requestedChannelsNumber, uint64_t requestedMask)
{
if ((supportedMask & requestedMask) == requestedMask)
return BestAVScore - qPopulationCount(supportedMask & ~requestedMask);
return calculateScoreByChannelsCount(supportedChannelsNumber, requestedChannelsNumber);
}
#if QT_FFMPEG_OLD_CHANNEL_LAYOUT
uint64_t adjustChannelLayout(const uint64_t *supportedMasks, uint64_t requested)
{
auto calcScore = [requested](uint64_t mask) {
return calculateScoreByChannelsMask(qPopulationCount(mask), mask,
qPopulationCount(requested), requested);
};
const auto result = findBestAVValue(supportedMasks, calcScore).first;
return result == 0 ? requested : result;
}
#else
AVChannelLayout adjustChannelLayout(const AVChannelLayout *supportedLayouts,
const AVChannelLayout &requested)
{
auto calcScore = [&requested](const AVChannelLayout &layout) {
if (layout == requested)
return BestAVScore;
// The only realistic case for now:
// layout.order == requested.order == AV_CHANNEL_ORDER_NATIVE
// Let's consider other orders to make safe code
if (layout.order == AV_CHANNEL_ORDER_CUSTOM || requested.order == AV_CHANNEL_ORDER_CUSTOM)
return calculateScoreByChannelsCount(layout.nb_channels, requested.nb_channels) - 1000;
const auto offset = layout.order == requested.order ? 1 : 100;
return calculateScoreByChannelsMask(layout.nb_channels, layout.u.mask,
requested.nb_channels, requested.u.mask)
- offset;
};
const auto result = findBestAVValue(supportedLayouts, calcScore);
return result.second == NotSuitableAVScore ? requested : result.first;
}
#endif
} // namespace QFFmpeg
QT_END_NAMESPACE
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