int video_play(int flags)
{
if (!gst_element_set_state(pipeline, GST_STATE_PAUSED))
return VIDEO_ERROR;
/* Ugly hack: Must disable audio because the GStreamer 'speed' element
* is broken in the 0.8.9 release. */
if (flags & VIDEO_SLOW_2X)
{
disable_audio();
g_object_set (G_OBJECT (vdrop), "speed", 0.5, NULL);
}
else if (flags & VIDEO_FAST_2X)
{
disable_audio();
g_object_set (G_OBJECT (vdrop), "speed", 2.0, NULL);
}
else if (flags & VIDEO_NORMAL_SPEED)
{
enable_audio();
g_object_set (G_OBJECT (vdrop), "speed", 1.0, NULL);
}
if (!gst_element_set_state(pipeline, GST_STATE_PLAYING))
return VIDEO_ERROR;
return VIDEO_OK;
}
safe_ptr<basic_frame> receive(int hints)
{
try
{
if(is_paused_)
return disable_audio(foreground_->last_frame());
auto frame = receive_and_follow(foreground_, hints);
if(frame == core::basic_frame::late())
return foreground_->last_frame();
auto frames_left = static_cast<int64_t>(foreground_->nb_frames()) - static_cast<int64_t>(++frame_number_) - static_cast<int64_t>(auto_play_delta_);
if(auto_play_delta_ > -1 && frames_left < 1)
{
play();
return receive(hints);
}
return frame;
}
catch(...)
{
CASPAR_LOG_CURRENT_EXCEPTION();
stop();
return core::basic_frame::empty();
}
}
safe_ptr<basic_frame> receive()
{
try
{
if(is_paused_)
return disable_audio(foreground_->last_frame());
auto frame = receive_and_follow(foreground_, frame_producer::NO_HINT);
if(frame == core::basic_frame::late())
return foreground_->last_frame();
auto frames_left = foreground_->nb_frames() - (++frame_number_) - auto_play_delta_;
if(auto_play_delta_ > -1 && frames_left < 1)
{
play();
return receive();
}
return frame;
}
catch(...)
{
CASPAR_LOG_CURRENT_EXCEPTION();
stop();
return core::basic_frame::empty();
}
}
safe_ptr<basic_frame> receive(int hints)
{
try
{
monitor_subject_ << monitor::message("/paused") % is_paused_;
if(is_paused_)
{
if(foreground_->last_frame() == basic_frame::empty())
foreground_->receive(frame_producer::NO_HINT);
return disable_audio(foreground_->last_frame());
}
auto foreground = foreground_;
auto frame = receive_and_follow(foreground, hints);
if(foreground != foreground_)
set_foreground(foreground);
if(frame == core::basic_frame::late())
return foreground_->last_frame();
auto frames_left = static_cast<int64_t>(foreground_->nb_frames()) - static_cast<int64_t>(++frame_number_) - static_cast<int64_t>(auto_play_delta_);
if(auto_play_delta_ > -1 && frames_left < 1)
{
play();
return receive(hints);
}
return frame;
}
catch(...)
{
CASPAR_LOG_CURRENT_EXCEPTION();
stop();
return core::basic_frame::empty();
}
}
virtual safe_ptr<core::basic_frame> last_frame() const override
{
return disable_audio(last_frame_);
}