AbstractStream::AbstractStream(const AVFormatContext *formatContext,
uint index, qint64 id, Clock *globalClock,
bool noModify,
QObject *parent): QObject(parent)
{
this->m_runPacketLoop = false;
this->m_runDataLoop = false;
this->m_paused = false;
this->m_isValid = false;
this->m_clockDiff = 0;
this->m_maxData = 0;
this->m_index = index;
this->m_id = id;
this->m_stream = (formatContext && index < formatContext->nb_streams)?
formatContext->streams[index]: NULL;
this->m_mediaType = this->m_stream?
this->m_stream->codec->codec_type:
AVMEDIA_TYPE_UNKNOWN;
this->m_codecContext = this->m_stream? this->m_stream->codec: NULL;
this->m_codec = this->m_codecContext?
avcodec_find_decoder(this->m_codecContext->codec_id):
NULL;
this->m_codecOptions = NULL;
this->m_packetQueueSize = 0;
this->m_globalClock = globalClock;
if (!this->m_codec)
return;
if (this->m_stream)
this->m_timeBase = AkFrac(this->m_stream->time_base.num,
this->m_stream->time_base.den);
if (!noModify) {
this->m_stream->discard = AVDISCARD_DEFAULT;
this->m_codecContext->workaround_bugs = 1;
this->m_codecContext->idct_algo = FF_IDCT_AUTO;
this->m_codecContext->error_concealment = FF_EC_GUESS_MVS | FF_EC_DEBLOCK;
if (this->m_codec->capabilities & CODEC_CAP_DR1)
this->m_codecContext->flags |= CODEC_FLAG_EMU_EDGE;
av_dict_set_int(&this->m_codecOptions, "refcounted_frames", 1, 0);
}
this->m_isValid = true;
}
AkPacket::AkPacket(const AkCaps &caps,
const QByteArray &buffer,
qint64 pts,
const AkFrac &timeBase,
int index,
qint64 id)
{
this->d = new AkPacketPrivate();
this->d->m_caps = caps;
bool isValid = this->d->m_caps.isValid();
this->d->m_buffer = isValid? buffer: QByteArray();
this->d->m_pts = isValid? pts: 0;
this->d->m_timeBase = isValid? timeBase: AkFrac();
this->d->m_index = isValid? index: -1;
this->d->m_id = isValid? id: -1;
}
AkVideoCaps &AkVideoCaps::operator =(const AkCaps &caps)
{
if (caps.mimeType() == "video/x-raw") {
this->d->m_isValid = caps.isValid();
this->update(caps);
} else {
this->d->m_isValid = false;
this->d->m_format = AkVideoCaps::Format_none;
this->d->m_bpp = 0;
this->d->m_width = 0;
this->d->m_height = 0;
this->d->m_fps = AkFrac();
}
return *this;
}
DesktopCaptureElement::DesktopCaptureElement():
AkMultimediaSourceElement()
{
this->m_fps = AkFrac(30000, 1001);
this->m_curScreenNumber = -1;
this->m_threadedRead = true;
QObject::connect(qApp,
&QGuiApplication::screenAdded,
this,
&DesktopCaptureElement::screenCountChanged);
QObject::connect(qApp,
&QGuiApplication::screenRemoved,
this,
&DesktopCaptureElement::screenCountChanged);
QObject::connect(QApplication::desktop(),
&QDesktopWidget::resized,
this,
&DesktopCaptureElement::srceenResized);
QObject::connect(&this->m_timer,
&QTimer::timeout,
this,
&DesktopCaptureElement::readFrame);
}
void AkPacket::resetTimeBase()
{
this->setTimeBase(AkFrac());
}
bool CaptureDShow::init()
{
// Create the pipeline.
if (FAILED(CoCreateInstance(CLSID_FilterGraph,
NULL,
CLSCTX_INPROC_SERVER,
IID_IGraphBuilder,
reinterpret_cast<void **>(&this->m_graph))))
return false;
// Create the webcam filter.
IBaseFilter *webcamFilter = this->findFilterP(this->m_device);
if (!webcamFilter) {
this->m_graph->Release();
this->m_graph = NULL;
return false;
}
if (FAILED(this->m_graph->AddFilter(webcamFilter, SOURCE_FILTER_NAME))) {
this->m_graph->Release();
this->m_graph = NULL;
return false;
}
// Create the Sample Grabber filter.
IBaseFilter *grabberFilter = NULL;
if (FAILED(CoCreateInstance(CLSID_SampleGrabber,
NULL,
CLSCTX_INPROC_SERVER,
IID_IBaseFilter,
reinterpret_cast<void **>(&grabberFilter)))) {
this->m_graph->Release();
this->m_graph = NULL;
return false;
}
if (FAILED(this->m_graph->AddFilter(grabberFilter, L"Grabber"))) {
this->m_graph->Release();
this->m_graph = NULL;
return false;
}
ISampleGrabber *grabberPtr = NULL;
if (FAILED(grabberFilter->QueryInterface(IID_ISampleGrabber,
reinterpret_cast<void **>(&grabberPtr)))) {
this->m_graph->Release();
this->m_graph = NULL;
return false;
}
if (FAILED(grabberPtr->SetOneShot(FALSE))) {
this->m_graph->Release();
this->m_graph = NULL;
return false;
}
HRESULT hr = grabberPtr->SetBufferSamples(TRUE);
if (FAILED(hr)) {
this->m_graph->Release();
this->m_graph = NULL;
return false;
}
if (this->m_ioMethod != IoMethodDirectRead) {
int type = this->m_ioMethod == IoMethodGrabSample? 0: 1;
hr = grabberPtr->SetCallback(&this->m_frameGrabber, type);
}
this->m_grabber = SampleGrabberPtr(grabberPtr, this->deleteUnknown);
if (!this->connectFilters(this->m_graph, webcamFilter, grabberFilter)) {
this->m_graph->Release();
this->m_graph = NULL;
return false;
}
// Create null filter.
IBaseFilter *nullFilter = NULL;
if (FAILED(CoCreateInstance(CLSID_NullRenderer,
NULL,
CLSCTX_INPROC_SERVER,
IID_IBaseFilter,
reinterpret_cast<void **>(&nullFilter)))) {
this->m_graph->Release();
this->m_graph = NULL;
return false;
}
if (FAILED(this->m_graph->AddFilter(nullFilter, L"NullFilter"))) {
this->m_graph->Release();
this->m_graph = NULL;
return false;
}
if (!this->connectFilters(this->m_graph, grabberFilter, nullFilter)) {
this->m_graph->Release();
this->m_graph = NULL;
return false;
}
// Set capture format
QList<int> streams = this->streams();
if (streams.isEmpty()) {
this->m_graph->Release();
this->m_graph = NULL;
return false;
}
MediaTypesList mediaTypes = this->listMediaTypes(webcamFilter);
if (mediaTypes.isEmpty()) {
this->m_graph->Release();
this->m_graph = NULL;
return false;
}
MediaTypePtr mediaType = streams[0] < mediaTypes.size()?
mediaTypes[streams[0]]:
mediaTypes.first();
if (FAILED(grabberPtr->SetMediaType(mediaType.data()))) {
this->m_graph->Release();
this->m_graph = NULL;
return false;
}
PinList pins = this->enumPins(webcamFilter, PINDIR_OUTPUT);
for (const PinPtr &pin: pins) {
IAMStreamConfig *pStreamConfig = NULL;
HRESULT hr =
pin->QueryInterface(IID_IAMStreamConfig,
reinterpret_cast<void **>(&pStreamConfig));
if (SUCCEEDED(hr))
pStreamConfig->SetFormat(mediaType.data());
if (pStreamConfig)
pStreamConfig->Release();
}
// Run the pipeline
IMediaControl *control = NULL;
if (FAILED(this->m_graph->QueryInterface(IID_IMediaControl,
reinterpret_cast<void **>(&control)))) {
this->m_graph->Release();
this->m_graph = NULL;
return false;
}
this->m_id = Ak::id();
AkCaps caps = this->capsFromMediaType(mediaType);
this->m_timeBase = AkFrac(caps.property("fps").toString()).invert();
if (FAILED(control->Run())) {
control->Release();
this->m_graph->Release();
this->m_graph = NULL;
return false;
}
control->Release();
this->m_localImageControls.clear();
this->m_localImageControls.clear();
return true;
}
void DesktopCaptureElement::resetFps()
{
this->setFps(AkFrac(30000, 1001));
}
AkPacket ConvertAudioFFmpeg::convert(const AkAudioPacket &packet,
const AkCaps &oCaps)
{
AkAudioCaps oAudioCaps(oCaps);
int64_t iSampleLayout = channelLayouts->value(packet.caps().layout(), 0);
AVSampleFormat iSampleFormat =
av_get_sample_fmt(AkAudioCaps::sampleFormatToString(packet.caps().format())
.toStdString().c_str());
int iSampleRate = packet.caps().rate();
int iNChannels = packet.caps().channels();
int iNSamples = packet.caps().samples();
int64_t oSampleLayout = channelLayouts->value(oAudioCaps.layout(),
AV_CH_LAYOUT_STEREO);
AVSampleFormat oSampleFormat =
av_get_sample_fmt(AkAudioCaps::sampleFormatToString(oAudioCaps.format())
.toStdString().c_str());
int oSampleRate = oAudioCaps.rate();
int oNChannels = oAudioCaps.channels();
this->m_resampleContext =
swr_alloc_set_opts(this->m_resampleContext,
oSampleLayout,
oSampleFormat,
oSampleRate,
iSampleLayout,
iSampleFormat,
iSampleRate,
0,
NULL);
if (!this->m_resampleContext)
return AkPacket();
// Create input audio frame.
static AVFrame iFrame;
memset(&iFrame, 0, sizeof(AVFrame));
iFrame.format = iSampleFormat;
iFrame.channels = iNChannels;
iFrame.channel_layout = uint64_t(iSampleLayout);
iFrame.sample_rate = iSampleRate;
iFrame.nb_samples = iNSamples;
iFrame.pts = iFrame.pkt_pts = packet.pts();
if (avcodec_fill_audio_frame(&iFrame,
iFrame.channels,
iSampleFormat,
reinterpret_cast<const uint8_t *>(packet.buffer().constData()),
packet.buffer().size(),
1) < 0) {
return AkPacket();
}
// Fill output audio frame.
AVFrame oFrame;
memset(&oFrame, 0, sizeof(AVFrame));
oFrame.format = oSampleFormat;
oFrame.channels = oNChannels;
oFrame.channel_layout = uint64_t(oSampleLayout);
oFrame.sample_rate = oSampleRate;
oFrame.nb_samples = int(swr_get_delay(this->m_resampleContext, oSampleRate))
+ iFrame.nb_samples
* oSampleRate
/ iSampleRate
+ 3;
oFrame.pts = oFrame.pkt_pts = iFrame.pts * oSampleRate / iSampleRate;
// Calculate the size of the audio buffer.
int frameSize = av_samples_get_buffer_size(oFrame.linesize,
oFrame.channels,
oFrame.nb_samples,
oSampleFormat,
1);
QByteArray oBuffer(frameSize, Qt::Uninitialized);
if (avcodec_fill_audio_frame(&oFrame,
oFrame.channels,
oSampleFormat,
reinterpret_cast<const uint8_t *>(oBuffer.constData()),
oBuffer.size(),
1) < 0) {
return AkPacket();
}
// convert to destination format
if (swr_convert_frame(this->m_resampleContext,
&oFrame,
&iFrame) < 0)
return AkPacket();
frameSize = av_samples_get_buffer_size(oFrame.linesize,
oFrame.channels,
oFrame.nb_samples,
oSampleFormat,
1);
oBuffer.resize(frameSize);
AkAudioPacket oAudioPacket;
oAudioPacket.caps() = oAudioCaps;
oAudioPacket.caps().samples() = oFrame.nb_samples;
oAudioPacket.buffer() = oBuffer;
oAudioPacket.pts() = oFrame.pts;
oAudioPacket.timeBase() = AkFrac(1, oAudioCaps.rate());
oAudioPacket.index() = packet.index();
oAudioPacket.id() = packet.id();
return oAudioPacket.toPacket();
}
void AkVideoCaps::resetFps()
{
this->setFps(AkFrac());
}
AkFrac AkFrac::invert() const
{
return AkFrac(this->d->m_den,
this->d->m_num);
}
AkFrac AkFrac::operator *(const AkFrac &other) const
{
return AkFrac(this->d->m_num * other.d->m_num,
this->d->m_den * other.d->m_den);
}
