4 commits

Author	SHA1	Message	Date
Tim-Philipp Müller	0ef44cefc9	alsamidisrc: unlock create function on shutdown ... Fixes occasional hang in generic/states unit test or GST_CHECKS=test_state_changes_up_and_down_seq make forever	2017-12-08 10:35:43 +00:00
Antonio Ospite	feacb875a4	alsamidisrc: Improve buffer timestamping ... Make buffer timestamps more accurate and, more importantly, actually representative of the MIDI events timing. Previously, buffers were only sent with timetamps aligned at a 10ms boundary which was just wrong, now the buffer timestamp represents the real time of the MIDI event. Conveniently, the ALSA sequencer API supports scheduling events in the future so the sequencer infrastructure can be used to have the tick delivered at the right time, avoiding any custom scheduling mechanism. The ticks scheduling starts on the first transition to PLAYING, and the delay is also calculated when the pipeline goes into PLAYING. https://bugzilla.gnome.org/show_bug.cgi?id=787683	2017-11-29 21:13:38 -05:00
Antonio Ospite	3a64ed723a	alsamidisrc: Expand snd_seq_create_simple_port() and use a queue for timestamps ... Events are timestamped with a real-time value representing the time passed since the queue timer was started. The timestamp is not used just yet. https://bugzilla.gnome.org/show_bug.cgi?id=787683	2017-11-29 21:13:38 -05:00
Antonio Ospite	2c7ed42292	midi: add an ALSA MIDI sequencer source ... The alsamidisrc element allows to get input event from ALSA MIDI sequencer devices, and possibly convert them to sound using some downstream element like fluiddec. Fixes #738687	2015-10-01 21:43:21 +02:00