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// Copyright (C) 2021 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 "qffmpegmediaformatinfo_p.h"
#include "qaudioformat.h"
#include "qimagewriter.h"
#include <qloggingcategory.h>
QT_BEGIN_NAMESPACE
static Q_LOGGING_CATEGORY(qLcMediaFormatInfo, "qt.multimedia.ffmpeg.mediaformatinfo")
static struct {
AVCodecID id;
QMediaFormat::VideoCodec codec;
} videoCodecMap [] = {
{ AV_CODEC_ID_MPEG1VIDEO, QMediaFormat::VideoCodec::MPEG1 },
{ AV_CODEC_ID_MPEG2VIDEO, QMediaFormat::VideoCodec::MPEG2 },
{ AV_CODEC_ID_MPEG4, QMediaFormat::VideoCodec::MPEG4 },
{ AV_CODEC_ID_H264, QMediaFormat::VideoCodec::H264 },
{ AV_CODEC_ID_HEVC, QMediaFormat::VideoCodec::H265 },
{ AV_CODEC_ID_VP8, QMediaFormat::VideoCodec::VP8 },
{ AV_CODEC_ID_VP9, QMediaFormat::VideoCodec::VP9 },
{ AV_CODEC_ID_AV1, QMediaFormat::VideoCodec::AV1 },
{ AV_CODEC_ID_THEORA, QMediaFormat::VideoCodec::Theora },
{ AV_CODEC_ID_WMV3, QMediaFormat::VideoCodec::WMV },
{ AV_CODEC_ID_MJPEG, QMediaFormat::VideoCodec::MotionJPEG }
};
static AVCodecID codecId(QMediaFormat::VideoCodec codec)
{
for (const auto &c : videoCodecMap) {
if (c.codec == codec)
return c.id;
}
return AV_CODEC_ID_NONE;
}
static struct {
AVCodecID id;
QMediaFormat::AudioCodec codec;
} audioCodecMap [] = {
{ AV_CODEC_ID_MP3, QMediaFormat::AudioCodec::MP3 },
{ AV_CODEC_ID_AAC, QMediaFormat::AudioCodec::AAC },
{ AV_CODEC_ID_AC3, QMediaFormat::AudioCodec::AC3 },
{ AV_CODEC_ID_EAC3, QMediaFormat::AudioCodec::EAC3 },
{ AV_CODEC_ID_FLAC, QMediaFormat::AudioCodec::FLAC },
{ AV_CODEC_ID_TRUEHD, QMediaFormat::AudioCodec::DolbyTrueHD },
{ AV_CODEC_ID_OPUS, QMediaFormat::AudioCodec::Opus },
{ AV_CODEC_ID_VORBIS, QMediaFormat::AudioCodec::Vorbis },
{ AV_CODEC_ID_PCM_S16LE, QMediaFormat::AudioCodec::Wave },
{ AV_CODEC_ID_WMAPRO, QMediaFormat::AudioCodec::WMA },
{ AV_CODEC_ID_ALAC, QMediaFormat::AudioCodec::ALAC }
};
static AVCodecID codecId(QMediaFormat::AudioCodec codec)
{
for (const auto &c : audioCodecMap) {
if (c.codec == codec)
return c.id;
}
return AV_CODEC_ID_NONE;
}
// mimetypes are mostly copied from qmediaformat.cpp. Unfortunately, FFmpeg uses
// in some cases slightly different mimetypes
static const struct
{
QMediaFormat::FileFormat fileFormat;
const char *mimeType;
const char *name; // disambiguate if we have several muxers/demuxers
} map[QMediaFormat::LastFileFormat + 1] = {
{ QMediaFormat::WMV, "video/x-ms-asf", "asf" },
{ QMediaFormat::AVI, "video/x-msvideo", nullptr },
{ QMediaFormat::Matroska, "video/x-matroska", nullptr },
{ QMediaFormat::MPEG4, "video/mp4", "mp4" },
{ QMediaFormat::Ogg, "video/ogg", nullptr },
// QuickTime is the same as MP4
{ QMediaFormat::WebM, "video/webm", "webm" },
// Audio Formats
// Mpeg4Audio is the same as MP4 without the video codecs
{ QMediaFormat::AAC, "audio/aac", nullptr },
// WMA is the same as WMV
{ QMediaFormat::FLAC, "audio/x-flac", nullptr },
{ QMediaFormat::MP3, "audio/mpeg", "mp3" },
{ QMediaFormat::Wave, "audio/x-wav", nullptr },
{ QMediaFormat::UnspecifiedFormat, nullptr, nullptr }
};
template <typename AVFormat>
static QMediaFormat::FileFormat formatForAVFormat(AVFormat *format)
{
if (!format->mime_type || !*format->mime_type)
return QMediaFormat::UnspecifiedFormat;
auto *m = map;
while (m->fileFormat != QMediaFormat::UnspecifiedFormat) {
if (m->mimeType && !strcmp(m->mimeType, format->mime_type)) {
// check if the name matches. This is used to disambiguate where FFmpeg provides
// multiple muxers or demuxers
if (!m->name || !strcmp(m->name, format->name))
return m->fileFormat;
}
++m;
}
return QMediaFormat::UnspecifiedFormat;
}
static const AVOutputFormat *avFormatForFormat(QMediaFormat::FileFormat format)
{
if (format == QMediaFormat::QuickTime || format == QMediaFormat::Mpeg4Audio)
format = QMediaFormat::MPEG4;
if (format == QMediaFormat::WMA)
format = QMediaFormat::WMV;
auto *m = map;
while (m->fileFormat != QMediaFormat::UnspecifiedFormat) {
if (m->fileFormat == format)
return av_guess_format(m->name, nullptr, m->mimeType);
++m;
}
return nullptr;
}
QFFmpegMediaFormatInfo::QFFmpegMediaFormatInfo()
{
qCDebug(qLcMediaFormatInfo) << ">>>> listing codecs";
QList<QMediaFormat::AudioCodec> audioEncoders;
QList<QMediaFormat::AudioCodec> extraAudioDecoders;
QList<QMediaFormat::VideoCodec> videoEncoders;
QList<QMediaFormat::VideoCodec> extraVideoDecoders;
const AVCodecDescriptor *descriptor = nullptr;
while ((descriptor = avcodec_descriptor_next(descriptor))) {
bool canEncode = (avcodec_find_encoder(descriptor->id) != nullptr);
bool canDecode = (avcodec_find_decoder(descriptor->id) != nullptr);
auto videoCodec = videoCodecForAVCodecId(descriptor->id);
auto audioCodec = audioCodecForAVCodecId(descriptor->id);
if (descriptor->type == AVMEDIA_TYPE_VIDEO && videoCodec != QMediaFormat::VideoCodec::Unspecified) {
if (canEncode) {
if (!videoEncoders.contains(videoCodec))
videoEncoders.append(videoCodec);
} else if (canDecode) {
if (!extraVideoDecoders.contains(videoCodec))
extraVideoDecoders.append(videoCodec);
}
}
else if (descriptor->type == AVMEDIA_TYPE_AUDIO && audioCodec != QMediaFormat::AudioCodec::Unspecified) {
if (canEncode) {
if (!audioEncoders.contains(audioCodec))
audioEncoders.append(audioCodec);
} else if (canDecode) {
if (!extraAudioDecoders.contains(audioCodec))
extraAudioDecoders.append(audioCodec);
}
}
}
// get demuxers
// qCDebug(qLcMediaFormatInfo) << ">>>> Muxers";
void *opaque = nullptr;
const AVOutputFormat *outputFormat = nullptr;
while ((outputFormat = av_muxer_iterate(&opaque))) {
auto mediaFormat = formatForAVFormat(outputFormat);
if (mediaFormat == QMediaFormat::UnspecifiedFormat)
continue;
// qCDebug(qLcMediaFormatInfo) << " mux:" << outputFormat->name << outputFormat->long_name << outputFormat->mime_type << outputFormat->extensions << mediaFormat;
CodecMap encoder;
encoder.format = mediaFormat;
for (auto codec : audioEncoders) {
auto id = codecId(codec);
// only add the codec if it can be used with this container
if (avformat_query_codec(outputFormat, id, FF_COMPLIANCE_NORMAL) == 1) {
// add codec for container
// qCDebug(qLcMediaFormatInfo) << " " << codec << Qt::hex << av_codec_get_tag(outputFormat->codec_tag, id);
encoder.audio.append(codec);
}
}
for (auto codec : videoEncoders) {
auto id = codecId(codec);
// only add the codec if it can be used with this container
if (avformat_query_codec(outputFormat, id, FF_COMPLIANCE_NORMAL) == 1) {
// add codec for container
// qCDebug(qLcMediaFormatInfo) << " " << codec << Qt::hex << av_codec_get_tag(outputFormat->codec_tag, id);
encoder.video.append(codec);
}
}
// sanity checks and handling special cases
if (encoder.audio.isEmpty() && encoder.video.isEmpty())
continue;
switch (encoder.format) {
case QMediaFormat::WMV:
// add WMA
encoders.append({ QMediaFormat::WMA, encoder.audio, {} });
break;
case QMediaFormat::MPEG4:
// add Mpeg4Audio and QuickTime
encoders.append({ QMediaFormat::QuickTime, encoder.audio, encoder.video });
encoders.append({ QMediaFormat::Mpeg4Audio, encoder.audio, {} });
break;
case QMediaFormat::Wave:
// FFmpeg allows other encoded formats in WAV containers, but we do not want that
if (!encoder.audio.contains(QMediaFormat::AudioCodec::Wave))
continue;
encoder.audio = { QMediaFormat::AudioCodec::Wave };
break;
default:
break;
}
encoders.append(encoder);
}
// FFmpeg doesn't allow querying supported codecs for decoders
// we take a simple approximation stating that we can decode what we
// can encode. That's a safe subset.
decoders = encoders;
#ifdef Q_OS_WINDOWS
// MediaFoundation HVEC encoder fails when processing frames
for (auto &encoder : encoders) {
auto h265index = encoder.video.indexOf(QMediaFormat::VideoCodec::H265);
if (h265index >= 0)
encoder.video.removeAt(h265index);
}
#endif
// qCDebug(qLcMediaFormatInfo) << "extraDecoders:" << extraAudioDecoders << extraVideoDecoders;
// FFmpeg can currently only decode WMA and WMV, not encode
if (extraAudioDecoders.contains(QMediaFormat::AudioCodec::WMA)) {
decoders[QMediaFormat::WMA].audio.append(QMediaFormat::AudioCodec::WMA);
decoders[QMediaFormat::WMV].audio.append(QMediaFormat::AudioCodec::WMA);
}
if (extraVideoDecoders.contains(QMediaFormat::VideoCodec::WMV)) {
decoders[QMediaFormat::WMV].video.append(QMediaFormat::VideoCodec::WMV);
}
// Add image formats we support. We currently simply use Qt's built-in image write
// to save images. That doesn't give us HDR support or support for larger bit depths,
// but most cameras can currently not generate those anyway.
const auto imgFormats = QImageWriter::supportedImageFormats();
for (const auto &f : imgFormats) {
if (f == "png")
imageFormats.append(QImageCapture::PNG);
else if (f == "jpeg")
imageFormats.append(QImageCapture::JPEG);
else if (f == "tiff")
imageFormats.append(QImageCapture::Tiff);
else if (f == "webp")
imageFormats.append(QImageCapture::WebP);
}
}
QFFmpegMediaFormatInfo::~QFFmpegMediaFormatInfo() = default;
QMediaFormat::AudioCodec QFFmpegMediaFormatInfo::audioCodecForAVCodecId(AVCodecID id)
{
for (const auto &c : audioCodecMap) {
if (c.id == id)
return c.codec;
}
return QMediaFormat::AudioCodec::Unspecified;
}
QMediaFormat::VideoCodec QFFmpegMediaFormatInfo::videoCodecForAVCodecId(AVCodecID id)
{
for (const auto &c : videoCodecMap) {
if (c.id == id)
return c.codec;
}
return QMediaFormat::VideoCodec::Unspecified;
}
QMediaFormat::FileFormat
QFFmpegMediaFormatInfo::fileFormatForAVInputFormat(const AVInputFormat *format)
{
// Seems like FFmpeg uses different names for muxers and demuxers of the same format.
// that makes it somewhat cumbersome to detect things correctly.
// The input formats have a comma separated list of short names. We check the first one of those
// as the docs specify that you only append to the list
static const struct
{
QMediaFormat::FileFormat fileFormat;
const char *name;
} map[QMediaFormat::LastFileFormat + 1] = {
{ QMediaFormat::WMV, "asf" },
{ QMediaFormat::AVI, "avi" },
{ QMediaFormat::Matroska, "matroska" },
{ QMediaFormat::MPEG4, "mov" },
{ QMediaFormat::Ogg, "ogg" },
{ QMediaFormat::WebM, "webm" },
// Audio Formats
// Mpeg4Audio is the same as MP4 without the video codecs
{ QMediaFormat::AAC, "aac"},
// WMA is the same as WMV
{ QMediaFormat::FLAC, "flac" },
{ QMediaFormat::MP3, "mp3" },
{ QMediaFormat::Wave, "wav" },
{ QMediaFormat::UnspecifiedFormat, nullptr }
};
if (!format->name)
return QMediaFormat::UnspecifiedFormat;
auto *m = map;
while (m->fileFormat != QMediaFormat::UnspecifiedFormat) {
if (!strncmp(m->name, format->name, strlen(m->name)))
return m->fileFormat;
++m;
}
return QMediaFormat::UnspecifiedFormat;
}
const AVOutputFormat *
QFFmpegMediaFormatInfo::outputFormatForFileFormat(QMediaFormat::FileFormat format)
{
return avFormatForFormat(format);
}
AVCodecID QFFmpegMediaFormatInfo::codecIdForVideoCodec(QMediaFormat::VideoCodec codec)
{
return codecId(codec);
}
AVCodecID QFFmpegMediaFormatInfo::codecIdForAudioCodec(QMediaFormat::AudioCodec codec)
{
return codecId(codec);
}
QAudioFormat::SampleFormat QFFmpegMediaFormatInfo::sampleFormat(AVSampleFormat format)
{
switch (format) {
case AV_SAMPLE_FMT_NONE:
default:
return QAudioFormat::Unknown;
case AV_SAMPLE_FMT_U8: ///< unsigned 8 bits
case AV_SAMPLE_FMT_U8P: ///< unsigned 8 bits: planar
return QAudioFormat::UInt8;
case AV_SAMPLE_FMT_S16: ///< signed 16 bits
case AV_SAMPLE_FMT_S16P: ///< signed 16 bits: planar
return QAudioFormat::Int16;
case AV_SAMPLE_FMT_S32: ///< signed 32 bits
case AV_SAMPLE_FMT_S32P: ///< signed 32 bits: planar
return QAudioFormat::Int32;
case AV_SAMPLE_FMT_FLT: ///< float
case AV_SAMPLE_FMT_FLTP: ///< float: planar
return QAudioFormat::Float;
case AV_SAMPLE_FMT_DBL: ///< double
case AV_SAMPLE_FMT_DBLP: ///< double: planar
case AV_SAMPLE_FMT_S64: ///< signed 64 bits
case AV_SAMPLE_FMT_S64P: ///< signed 64 bits, planar
// let's use float
return QAudioFormat::Float;
}
}
AVSampleFormat QFFmpegMediaFormatInfo::avSampleFormat(QAudioFormat::SampleFormat format)
{
switch (format) {
case QAudioFormat::UInt8:
return AV_SAMPLE_FMT_U8;
case QAudioFormat::Int16:
return AV_SAMPLE_FMT_S16;
case QAudioFormat::Int32:
return AV_SAMPLE_FMT_S32;
case QAudioFormat::Float:
return AV_SAMPLE_FMT_FLT;
default:
return AV_SAMPLE_FMT_NONE;
}
}
int64_t QFFmpegMediaFormatInfo::avChannelLayout(QAudioFormat::ChannelConfig channelConfig)
{
int64_t avChannelLayout = 0;
if (channelConfig & (1 << QAudioFormat::FrontLeft))
avChannelLayout |= AV_CH_FRONT_LEFT;
if (channelConfig & (1 << QAudioFormat::FrontRight))
avChannelLayout |= AV_CH_FRONT_RIGHT;
if (channelConfig & (1 << QAudioFormat::FrontCenter))
avChannelLayout |= AV_CH_FRONT_CENTER;
if (channelConfig & (1 << QAudioFormat::LFE))
avChannelLayout |= AV_CH_LOW_FREQUENCY;
if (channelConfig & (1 << QAudioFormat::BackLeft))
avChannelLayout |= AV_CH_BACK_LEFT;
if (channelConfig & (1 << QAudioFormat::BackRight))
avChannelLayout |= AV_CH_BACK_RIGHT;
if (channelConfig & (1 << QAudioFormat::FrontLeftOfCenter))
avChannelLayout |= AV_CH_FRONT_LEFT_OF_CENTER;
if (channelConfig & (1 << QAudioFormat::FrontRightOfCenter))
avChannelLayout |= AV_CH_FRONT_RIGHT_OF_CENTER;
if (channelConfig & (1 << QAudioFormat::BackCenter))
avChannelLayout |= AV_CH_BACK_CENTER;
if (channelConfig & (1 << QAudioFormat::LFE2))
avChannelLayout |= AV_CH_LOW_FREQUENCY_2;
if (channelConfig & (1 << QAudioFormat::SideLeft))
avChannelLayout |= AV_CH_SIDE_LEFT;
if (channelConfig & (1 << QAudioFormat::SideRight))
avChannelLayout |= AV_CH_SIDE_RIGHT;
if (channelConfig & (1 << QAudioFormat::TopFrontLeft))
avChannelLayout |= AV_CH_TOP_FRONT_LEFT;
if (channelConfig & (1 << QAudioFormat::TopFrontRight))
avChannelLayout |= AV_CH_TOP_FRONT_RIGHT;
if (channelConfig & (1 << QAudioFormat::TopFrontCenter))
avChannelLayout |= AV_CH_TOP_FRONT_CENTER;
if (channelConfig & (1 << QAudioFormat::TopCenter))
avChannelLayout |= AV_CH_TOP_CENTER;
if (channelConfig & (1 << QAudioFormat::TopBackLeft))
avChannelLayout |= AV_CH_TOP_BACK_LEFT;
if (channelConfig & (1 << QAudioFormat::TopBackRight))
avChannelLayout |= AV_CH_TOP_BACK_RIGHT;
if (channelConfig & (1 << QAudioFormat::TopBackCenter))
avChannelLayout |= AV_CH_TOP_BACK_CENTER;
// The defines used below got added together for FFmpeg 4.4
#ifdef AV_CH_TOP_SIDE_LEFT
if (channelConfig & (1 << QAudioFormat::TopSideLeft))
avChannelLayout |= AV_CH_TOP_SIDE_LEFT;
if (channelConfig & (1 << QAudioFormat::TopSideRight))
avChannelLayout |= AV_CH_TOP_SIDE_RIGHT;
if (channelConfig & (1 << QAudioFormat::BottomFrontCenter))
avChannelLayout |= AV_CH_BOTTOM_FRONT_CENTER;
if (channelConfig & (1 << QAudioFormat::BottomFrontLeft))
avChannelLayout |= AV_CH_BOTTOM_FRONT_LEFT;
if (channelConfig & (1 << QAudioFormat::BottomFrontRight))
avChannelLayout |= AV_CH_BOTTOM_FRONT_RIGHT;
#endif
return avChannelLayout;
}
QAudioFormat::ChannelConfig QFFmpegMediaFormatInfo::channelConfigForAVLayout(int64_t avChannelLayout)
{
quint32 channelConfig = 0;
if (avChannelLayout & AV_CH_FRONT_LEFT)
channelConfig |= QAudioFormat::channelConfig(QAudioFormat::FrontLeft);
if (avChannelLayout & AV_CH_FRONT_RIGHT)
channelConfig |= QAudioFormat::channelConfig(QAudioFormat::FrontRight);
if (avChannelLayout & AV_CH_FRONT_CENTER)
channelConfig |= QAudioFormat::channelConfig(QAudioFormat::FrontCenter);
if (avChannelLayout & AV_CH_LOW_FREQUENCY)
channelConfig |= QAudioFormat::channelConfig(QAudioFormat::LFE);
if (avChannelLayout & AV_CH_BACK_LEFT)
channelConfig |= QAudioFormat::channelConfig(QAudioFormat::BackLeft);
if (avChannelLayout & AV_CH_BACK_RIGHT)
channelConfig |= QAudioFormat::channelConfig(QAudioFormat::BackRight);
if (avChannelLayout & AV_CH_FRONT_LEFT_OF_CENTER)
channelConfig |= QAudioFormat::channelConfig(QAudioFormat::FrontLeftOfCenter);
if (avChannelLayout & AV_CH_FRONT_RIGHT_OF_CENTER)
channelConfig |= QAudioFormat::channelConfig(QAudioFormat::FrontRightOfCenter);
if (avChannelLayout & AV_CH_BACK_CENTER)
channelConfig |= QAudioFormat::channelConfig(QAudioFormat::BackCenter);
if (avChannelLayout & AV_CH_LOW_FREQUENCY_2)
channelConfig |= QAudioFormat::channelConfig(QAudioFormat::LFE2);
if (avChannelLayout & AV_CH_SIDE_LEFT)
channelConfig |= QAudioFormat::channelConfig(QAudioFormat::SideLeft);
if (avChannelLayout & AV_CH_SIDE_RIGHT)
channelConfig |= QAudioFormat::channelConfig(QAudioFormat::SideRight);
if (avChannelLayout & AV_CH_TOP_FRONT_LEFT)
channelConfig |= QAudioFormat::channelConfig(QAudioFormat::TopFrontLeft);
if (avChannelLayout & AV_CH_TOP_FRONT_RIGHT)
channelConfig |= QAudioFormat::channelConfig(QAudioFormat::TopFrontRight);
if (avChannelLayout & AV_CH_TOP_FRONT_CENTER)
channelConfig |= QAudioFormat::channelConfig(QAudioFormat::TopFrontCenter);
if (avChannelLayout & AV_CH_TOP_CENTER)
channelConfig |= QAudioFormat::channelConfig(QAudioFormat::TopCenter);
if (avChannelLayout & AV_CH_TOP_BACK_LEFT)
channelConfig |= QAudioFormat::channelConfig(QAudioFormat::TopBackLeft);
if (avChannelLayout & AV_CH_TOP_BACK_RIGHT)
channelConfig |= QAudioFormat::channelConfig(QAudioFormat::TopBackRight);
if (avChannelLayout & AV_CH_TOP_BACK_CENTER)
channelConfig |= QAudioFormat::channelConfig(QAudioFormat::TopBackCenter);
// The defines used below got added together for FFmpeg 4.4
#ifdef AV_CH_TOP_SIDE_LEFT
if (avChannelLayout & AV_CH_TOP_SIDE_LEFT)
channelConfig |= QAudioFormat::channelConfig(QAudioFormat::TopSideLeft);
if (avChannelLayout & AV_CH_TOP_SIDE_RIGHT)
channelConfig |= QAudioFormat::channelConfig(QAudioFormat::TopSideRight);
if (avChannelLayout & AV_CH_BOTTOM_FRONT_CENTER)
channelConfig |= QAudioFormat::channelConfig(QAudioFormat::BottomFrontCenter);
if (avChannelLayout & AV_CH_BOTTOM_FRONT_LEFT)
channelConfig |= QAudioFormat::channelConfig(QAudioFormat::BottomFrontLeft);
if (avChannelLayout & AV_CH_BOTTOM_FRONT_RIGHT)
channelConfig |= QAudioFormat::channelConfig(QAudioFormat::BottomFrontRight);
#endif
return QAudioFormat::ChannelConfig(channelConfig);
}
QAudioFormat QFFmpegMediaFormatInfo::audioFormatFromCodecParameters(AVCodecParameters *codecpar)
{
QAudioFormat format;
format.setSampleFormat(sampleFormat(AVSampleFormat(codecpar->format)));
format.setSampleRate(codecpar->sample_rate);
#if QT_FFMPEG_OLD_CHANNEL_LAYOUT
uint64_t channelLayout = codecpar->channel_layout;
if (!channelLayout)
channelLayout = avChannelLayout(QAudioFormat::defaultChannelConfigForChannelCount(codecpar->channels));
#else
uint64_t channelLayout = 0;
if (codecpar->ch_layout.order == AV_CHANNEL_ORDER_NATIVE)
channelLayout = codecpar->ch_layout.u.mask;
else
channelLayout = avChannelLayout(QAudioFormat::defaultChannelConfigForChannelCount(codecpar->ch_layout.nb_channels));
#endif
format.setChannelConfig(channelConfigForAVLayout(channelLayout));
return format;
}
QT_END_NAMESPACE
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