seq: add boxed structure for event

[GitHub pull_request - opened]

alsa-project/alsa-gobject pull request #75 was opened from takaswie:

```
Current implementation provides ALSASeq.EventCntr to handle batch of
sequencer events. Parameters of each event are set/get by public methods
of it with index of event. But it's necesarrily convenient.

This patchset adds boxed structure to express each of the event. Some
public methods are rewritten according to it, with code refactoring. ALSASeq.EventCntr
is largely rewritten with serializer/deserializer for flattened event buffer.

Takashi Sakamoto (12):
  update README
  seq: event-cntr/event-data-queue: obsolete timestamp functions by adding alternatives
  seq: tstamp: remove unused boxed structure
  seq: remove-filter: remove unused error arguments
  seq: enums: rename to tstamp mode
  seq: port-info: rename properties for time stamp
  seq: enums: obsolete ALSASeqSubscribeFlag enumerations
  seq: event: add boxed structure for event
  seq: user-client: add public API to schedule list of events
  seq: user-client: rewrite public API to schedule single event
  seq: event-cntr: rewrite as boxed structure
  seq: event-cntr: add internal API to serialize list of events

 README.rst                   |   18 +-
 samples/seq                  |   96 +-
 src/seq/alsaseq-enum-types.h |   49 +-
 src/seq/alsaseq.h            |    3 +-
 src/seq/alsaseq.map          |  133 +--
 src/seq/event-cntr.c         | 1709 ++--------------------------------
 src/seq/event-cntr.h         |  115 +--
 src/seq/event-data-queue.c   |   52 +-
 src/seq/event-data-queue.h   |   13 +-
 src/seq/event.c              | 1687 +++++++++++++++++++++++++++++++++
 src/seq/event.h              |  112 +++
 src/seq/meson.build          |    4 +-
 src/seq/port-info.c          |  118 ++-
 src/seq/privates.h           |    5 +
 src/seq/remove-filter.c      |   31 +-
 src/seq/remove-filter.h      |   17 +-
 src/seq/subscribe-data.c     |  115 ++-
 src/seq/tstamp.c             |   81 --
 src/seq/tstamp.h             |   24 -
 src/seq/user-client.c        |  153 ++-
 src/seq/user-client.h        |   18 +-
 tests/alsaseq-enums          |   20 +-
 tests/alsaseq-event-cntr     |   60 --
 tests/alsaseq-port-info      |    4 +-
 tests/alsaseq-subscribe-data |    4 +-
 tests/alsaseq-user-client    |    1 +
 tests/meson.build            |    1 -
 27 files changed, 2452 insertions(+), 2191 deletions(-)
 create mode 100644 src/seq/event.c
 create mode 100644 src/seq/event.h
 delete mode 100644 src/seq/tstamp.c
 delete mode 100644 src/seq/tstamp.h
 delete mode 100644 tests/alsaseq-event-cntr
```

Request URL   : https://github.com/alsa-project/alsa-gobject/pull/75
Patch URL     : https://github.com/alsa-project/alsa-gobject/pull/75.patch
Repository URL: https://github.com/alsa-project/alsa-gobject