void VideoPlayerBackend::clear()
{
if (m_sink)
g_object_unref(m_sink);
if (m_pipeline)
{
qDebug("gstreamer: Destroying pipeline");
/* Disable the message handlers to avoid anything calling back into this instance */
GstBus *bus = gst_pipeline_get_bus(GST_PIPELINE(m_pipeline));
Q_ASSERT(bus);
gst_bus_disable_sync_message_emission(bus);
gst_object_unref(bus);
gst_element_set_state(m_pipeline, GST_STATE_NULL);
/* Ensure the transition to NULL completes */
gst_element_get_state(m_pipeline, 0, 0, GST_CLOCK_TIME_NONE);
gst_object_unref(GST_OBJECT(m_pipeline));
}
m_pipeline = m_videoLink = m_sink = 0;
setVideoBuffer(0);
m_state = Stopped;
m_errorMessage.clear();
}
bool MplVideoPlayerBackend::start(const QUrl &url)
{
qDebug() << "MplVideoPlayerBackend::start url =" << url << "\n";
if (state() == PermanentError)
return false;
if (m_wid.isNull() || m_wid.isEmpty())
{
setError(false, tr("Window id is not set"));
return false;
}
if (m_mplayer)
m_mplayer->deleteLater();
createMplayerProcess();
/* Buffered HTTP source */
setVideoBuffer(new VideoHttpBuffer(url));
m_videoBuffer->startBuffering();
m_playbackSpeed = 1.0;
qDebug() << "MplVideoPlayerBackend::start mplayer process started\n";
return true;
}
void GstVideoPlayerBackend::clear()
{
if (m_sink)
g_object_unref(m_sink);
/* stream doesn't support audio. Audio elemets have been unlinked from bus, but they stil are in PAUSED state.
* Set their state to null to avoid warning on disposing
*/
if (!m_hasAudio && m_audioDecoder)
{
gst_element_set_state(m_audioDecoder, GST_STATE_NULL);
gst_element_set_state(m_audioQueue, GST_STATE_NULL);
gst_element_set_state(m_audioLink, GST_STATE_NULL);
gst_element_set_state(m_audioResample, GST_STATE_NULL);
gst_element_set_state(m_volumeController, GST_STATE_NULL);
gst_element_set_state(m_audioSink, GST_STATE_NULL);
}
if (m_pipeline)
{
qDebug("gstreamer: Destroying pipeline");
/* Disable the message handlers to avoid anything calling back into this instance */
GstBus *bus = gst_pipeline_get_bus(GST_PIPELINE(m_pipeline));
Q_ASSERT(bus);
gst_bus_disable_sync_message_emission(bus);
gst_object_unref(bus);
gst_element_set_state(m_pipeline, GST_STATE_NULL);
/* Ensure the transition to NULL completes */
gst_element_get_state(m_pipeline, 0, 0, GST_CLOCK_TIME_NONE);
gst_object_unref(GST_OBJECT(m_pipeline));
}
m_pipeline = m_videoLink = m_sink = m_audioLink = 0;
m_audioDecoder = m_audioQueue = m_audioResample = m_volumeController = m_audioSink = 0;
m_hasAudio = false;
setVideoBuffer(0);
m_state = Stopped;
m_errorMessage.clear();
}
void MplVideoPlayerBackend::clear()
{
if (m_mplayer)
{
#ifdef Q_OS_MAC
delete m_mplayer;
#else
m_mplayer->deleteLater();
#endif
m_mplayer = 0;
}
setVideoBuffer(0);
m_state = Stopped;
m_errorMessage.clear();
}
bool GstVideoPlayerBackend::start(const QUrl &url)
{
Q_ASSERT(!m_pipeline);
if (state() == PermanentError || m_pipeline)
return false;
if (!m_sink)
{
setError(true, QLatin1String("Internal error: improper usage"));
return false;
}
/* Pipeline */
m_pipeline = gst_pipeline_new("stream");
if (!m_pipeline)
{
setError(true, tr("Failed to create video pipeline (%1)").arg(QLatin1String("stream")));
return false;
}
// TODO: uncomment when vaapi download starts works
// enableFactory("vaapidecode", m_useHardwareDecoding);
enableFactory("vaapidecode", false);
/* Buffered HTTP source */
setVideoBuffer(new VideoHttpBuffer(url));
GstElement *source = m_videoBuffer->setupSrcElement(m_pipeline);
if (!source)
{
setError(true, tr("Failed to create video pipeline (%1)").arg(QLatin1String("source")));
setVideoBuffer(0);
return false;
}
m_videoBuffer->startBuffering();
GstElement *demuxer = gst_element_factory_make("matroskademux","avi-demuxer");
g_signal_connect(demuxer, "pad-added", G_CALLBACK(staticDemuxerPadReady), this);
g_signal_connect(demuxer, "no-more-pads", G_CALLBACK(staticDemuxerNoMorePads), this);
gst_bin_add(GST_BIN(m_pipeline), demuxer);
if (!gst_element_link(source, demuxer))
{
setError(true, tr("Failed to create pipeline (%1)").arg(QLatin1String("demuxer")));
return false;
}
if (!setupVideoPipeline() || !setupAudioPipeline())
return false;
m_playbackSpeed = 1.0;
/* We handle all messages in the sync handler, because we can't run a glib event loop.
* Although linux does use glib's loop (and we could take advantage of that), it's better
* to handle everything this way for windows and mac support. */
GstBus *bus = gst_pipeline_get_bus(GST_PIPELINE(m_pipeline));
Q_ASSERT(bus);
gst_bus_enable_sync_message_emission(bus);
gst_bus_set_sync_handler(bus, staticBusHandler, this);
gst_object_unref(bus);
/* Move the pipeline into the PLAYING state. This call may block for a very long time
* (up to several seconds), because it will block until the pipeline has completed that move. */
gst_element_set_state(m_pipeline, GST_STATE_READY);
return true;
}
bool VideoPlayerBackend::start(const QUrl &url)
{
Q_ASSERT(!m_pipeline);
if (state() == PermanentError || m_pipeline)
return false;
if (!m_sink)
{
setError(true, QLatin1String("Internal error: improper usage"));
return false;
}
/* Pipeline */
m_pipeline = gst_pipeline_new("stream");
if (!m_pipeline)
{
setError(true, tr("Failed to create video pipeline (%1)").arg(QLatin1String("stream")));
return false;
}
/* Buffered HTTP source */
setVideoBuffer(new VideoHttpBuffer(url));
GstElement *source = m_videoBuffer->setupSrcElement(m_pipeline);
if (!source)
{
setError(true, tr("Failed to create video pipeline (%1)").arg(QLatin1String("source")));
setVideoBuffer(0);
return false;
}
m_videoBuffer->startBuffering();
/* Decoder */
GstElement *decoder = gst_element_factory_make("decodebin2", "decoder");
if (!decoder)
{
setError(true, tr("Failed to create video pipeline (%1)").arg(QLatin1String("decoder")));
return false;
}
g_object_set(G_OBJECT(decoder),
"use-buffering", TRUE,
"max-size-time", 10 * GST_SECOND,
NULL);
g_signal_connect(decoder, "new-decoded-pad", G_CALLBACK(staticDecodePadReady), this);
/* Colorspace conversion (no-op if unnecessary) */
GstElement *colorspace = gst_element_factory_make("ffmpegcolorspace", "colorspace");
if (!colorspace)
{
setError(true, tr("Failed to create video pipeline (%1)").arg(QLatin1String("colorspace")));
return false;
}
gst_bin_add_many(GST_BIN(m_pipeline), decoder, colorspace, m_sink, NULL);
if (!gst_element_link(source, decoder))
{
setError(true, tr("Failed to create video pipeline (%1)").arg(QLatin1String("link decoder")));
return false;
}
if (!gst_element_link(colorspace, m_sink))
{
setError(true, tr("Failed to create video pipeline (%1)").arg(QLatin1String("link sink")));
return false;
}
/* This is the element that is linked to the decoder for video output; it will be linked when decodePadReady
* gives us the video pad. */
m_videoLink = colorspace;
m_playbackSpeed = 1.0;
/* We handle all messages in the sync handler, because we can't run a glib event loop.
* Although linux does use glib's loop (and we could take advantage of that), it's better
* to handle everything this way for windows and mac support. */
GstBus *bus = gst_pipeline_get_bus(GST_PIPELINE(m_pipeline));
Q_ASSERT(bus);
gst_bus_enable_sync_message_emission(bus);
gst_bus_set_sync_handler(bus, staticBusHandler, this);
gst_object_unref(bus);
/* Move the pipeline into the PLAYING state. This call may block for a very long time
* (up to several seconds), because it will block until the pipeline has completed that move. */
gst_element_set_state(m_pipeline, GST_STATE_READY);
return true;
}
