qffmpegavaudioformat.cpp

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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 "qffmpegavaudioformat_p.h"
#include "qaudioformat.h"
#include "qffmpegmediaformatinfo_p.h"
 
#include <QtCore/qdebug.h>
 
extern "C" {
#include <libavutil/opt.h>
}
 
QT_BEGIN_NAMESPACE
 
namespace QFFmpeg {
 
AVAudioFormat::AVAudioFormat(const AVCodecContext *context)
    : sampleFormat(context->sample_fmt), sampleRate(context->sample_rate)
{
#if QT_FFMPEG_HAS_AV_CHANNEL_LAYOUT
    channelLayout = context->ch_layout;
#else
    if (context->channel_layout) {
        channelLayoutMask = context->channel_layout;
    } else {
        const auto channelConfig =
                QAudioFormat::defaultChannelConfigForChannelCount(context->channels);
        channelLayoutMask = QFFmpegMediaFormatInfo::avChannelLayout(channelConfig);
    }
#endif
}
 
AVAudioFormat::AVAudioFormat(const AVCodecParameters *codecPar)
    : sampleFormat(AVSampleFormat(codecPar->format)), sampleRate(codecPar->sample_rate)
{
#if QT_FFMPEG_HAS_AV_CHANNEL_LAYOUT
    channelLayout = codecPar->ch_layout;
#else
    if (codecPar->channel_layout) {
        channelLayoutMask = codecPar->channel_layout;
    } else {
        const auto channelConfig =
                QAudioFormat::defaultChannelConfigForChannelCount(codecPar->channels);
        channelLayoutMask = QFFmpegMediaFormatInfo::avChannelLayout(channelConfig);
    }
#endif
}
 
AVAudioFormat::AVAudioFormat(const QAudioFormat &audioFormat)
    : sampleFormat(QFFmpegMediaFormatInfo::avSampleFormat(audioFormat.sampleFormat())),
      sampleRate(audioFormat.sampleRate())
{
    const auto channelConfig = audioFormat.channelConfig() == QAudioFormat::ChannelConfigUnknown
            ? QAudioFormat::defaultChannelConfigForChannelCount(audioFormat.channelCount())
            : audioFormat.channelConfig();
 
    const auto mask = QFFmpegMediaFormatInfo::avChannelLayout(channelConfig);
 
#if QT_FFMPEG_HAS_AV_CHANNEL_LAYOUT
    av_channel_layout_from_mask(&channelLayout, mask);
#else
    channelLayoutMask = mask;
#endif
}
 
bool operator==(const AVAudioFormat &lhs, const AVAudioFormat &rhs)
{
    return lhs.sampleFormat == rhs.sampleFormat && lhs.sampleRate == rhs.sampleRate &&
#if QT_FFMPEG_HAS_AV_CHANNEL_LAYOUT
            lhs.channelLayout == rhs.channelLayout
#else
            lhs.channelLayoutMask == rhs.channelLayoutMask
#endif
            ;
}
 
QDebug operator<<(QDebug dbg, const AVAudioFormat &format)
{
    dbg << '[';
    const char *sampleFormatName = av_get_sample_fmt_name(format.sampleFormat);
    dbg << "sample format:" << (sampleFormatName ? sampleFormatName : "unknown");
    dbg << ", sample rate:" << format.sampleRate;
 
#if QT_FFMPEG_HAS_AV_CHANNEL_LAYOUT
    dbg << ", channel layout:" << format.channelLayout;
#else
    dbg << "channel layout:" << Qt::bin << format.channelLayoutMask << Qt::dec;
#endif
    dbg << ']';
    return dbg;
}
 
} // namespace QFFmpeg
 
QT_END_NAMESPACE