Commit graph

364 commits

Author SHA1 Message Date
Mathieu Duponchelle
de796c95f0 tttocea608: refactor to fit more scenarios
- Report a latency:
  By design, tttocea608 will output buffers in the "past" when
  receiving an input buffer: we want the second to last buffer
  in the buffer list that we output to have the same pts as the
  input buffer, as it contains the end_of_caption control code
  which determines when the current closed caption actually gets
  displayed in pop_on mode. The previous buffers have timestamps
  decreasing as a function of the framerate, for up to potentially
  74 byte pairs (the breakdown is detailed in a comment).

  The element thus has to report a latency, at 30 frames per second
  it represents around 2.5 seconds.

- Refactor timestamping:
  Stop using a frame duration, but rather base our timestamps on
  a scaled frame index. This is to avoid rounding errors, and
  allow for exactly one byte pair per buffer if the proper framerate
  is set on the closed caption branch, and the video branch has
  perfect timestamps, eg videorate. In practice, that one byte
  pair per frame requirement should only matter for line 21 encoding,
  but we have to think about this use case too.

- Splice in erase_display_memory:
  When there is a gap between the end of a buffer and the start
  of the next one, we want to erase the display memory (this
  is unnecessary otherwise, as the end_of_caption control code
  will in effect ensure that the display is erased when the
  new caption is displayed). The previous implementation only
  supported this imperfectly, as it could cause timestamps to
  go backwards.

- Output last erase_display_memory:
  The previous implementation was missing the final
  erase_display_memory on EOS

- Output gaps

- Write more tests

Part-of: <https://gitlab.freedesktop.org/gstreamer/gst-plugins-rs/-/merge_requests/314>
2020-04-23 20:10:42 +02:00
Guillaume Desmottes
92163c46b2 flavors: remove git suffix from git dep
Not needed and will make cargo deny sources list homogeneous.
2020-04-16 14:04:21 +02:00
Guillaume Desmottes
bdb0e72cc7 fix LGPL-2.1+ license in Cargo.toml
The proper SPDX name is LGPL-2.1-or-later, see https://spdx.org/licenses/
2020-04-16 13:07:21 +02:00
Mathieu Duponchelle
2d6a220c00 Update all versions to 0.6.0 2020-04-15 20:39:50 +02:00
Sebastian Dröge
f1e3212477 closedcaption: Convert bitfields to uint8_t for portability reasons
Contrary to what one might believe, this actually reduces the size of
the structs due to alignment constraints. On Linux x86-64 clang/gcc it
reduces the size of the caption_frame_t struct from 7760 bytes to 6800
bytes, on Windows x86-64 MSVC from 11600 bytes to 6800 bytes.

It also causes simpler and potentially faster assembly to be generated
as the values can be directly accessed as uint8_t instead of having to
extract the corresponding bits with bitwise operations.

It also gives us the same ABI with clang/gcc and MSVC.
2020-04-14 20:01:30 +03:00
Sebastian Dröge
70ef91fb4a closedcaption: Update bindgen generated FFI bindings to latest version 2020-04-14 19:34:57 +03:00
Sebastian Dröge
8370fb8a11 closedcaption: Port to combine 4 2020-04-14 09:22:43 +00:00
Sebastian Dröge
3c226a05d5 closedcaption/mccparse: Refactor parser state handling a bit
To make it a bit less confusing. The name of the state previously was
what was previously parsed, not what is expected now.
2020-04-13 15:00:23 +03:00
Sebastian Dröge
163e8cf1a0 closedcaption/sccparse: Don't strictly require empty lines between each caption line
There is some broken software out there not inserting the empty lines
and we don't really need them for proper parsing. Only require an empty
line between header and the first caption line.
2020-04-13 15:00:11 +03:00
Guillaume Desmottes
acbd3066e8 cdg: update image and cdg_renderer deps 2020-04-06 10:49:14 +02:00
Arun Raghavan
bc5d05f5e8 Update all documentation to point to the updated repository name
Just gst-plugin-rs -> gst-plugins-rs
2020-04-05 19:10:47 +00:00
Arun Raghavan
9c0416b56d Rename flv directory as flavors
Follows the same convention as all the other plugins.
2020-04-05 19:10:47 +00:00
Arun Raghavan
dc3c8fd049 Drop gst-plugin- prefix in plugin directory name 2020-04-05 19:10:47 +00:00
Arun Raghavan
205b6040fb Reorganise plugins into directories by function
This should start making navigating the tree a little easier to start
with, and we can then move to allowing building specific groups of
plugins as well.

The plugins are moved into the following hierarchy:

  audio
    / gst-plugin-audiofx
    / gst-plugin-claxon
    / gst-plugin-csound
    / gst-plugin-lewton
  generic
    / gst-plugin-file
    / gst-plugin-sodium
    / gst-plugin-threadshare
  net
    / gst-plugin-reqwest
    / gst-plugin-rusoto
  utils
    / gst-plugin-fallbackswitch
    / gst-plugin-togglerecord
  video
    / gst-plugin-cdg
    / gst-plugin-closedcaption
    / gst-plugin-dav1d
    / gst-plugin-flv
    / gst-plugin-gif
    / gst-plugin-rav1e

  gst-plugin-tutorial
  gst-plugin-version-helper
2020-04-05 19:10:46 +00:00