Uses obs_source_get_ref on the sources enumerated in the tick_sources
function in obs-video.c to ensure a reference has been incremented
before calling that source's video_tick, and replaces an
obs_source_addref with obs_source_get_ref in the push_audio_tree
function in obs-audio.c to ensure that it cannot increment a source that
has already decremented its reference to 0.
If the remove_connection call of obs_encoder_stop_internal took too
long, obs_encoder_destroy could get called before that function
completed, causing a race condition.
This actually isn't necessary because the graphics subsystem technically
automatically frees effects, but that could change, so call this just to
be safe.
Allows the ability to encode by passing NV12 textures. This uses a
separate thread for texture-based encoders with a small queue of
textures. An output texture with a keyed mutex shared texture is locked
between OBS and each encoder. A new encoder callback and capability
flag is used to encode with textures.
This splits the "do_encode" function in to "do_encode" and
"send_off_encoder_packet", the latter of which allows the ability for
texture-based encoders to manage their own encoding and just simply send
off a packet to the outputs.
Normally, the total and skipped frame count for the encoder is performed
in the video-io thread. However, because a new thread is being
introduced for texture-based encoding, the frontend has no way of being
able to query that. So, instead of making the frontend query that data
separately, just make the texture encoder thread increment the values of
video-io. That way, the frontend doesn't need to change any code, and
can continue using the same functions for determining the total/skipped
frame count.
This can cause the frame count to be doubled if both a texture-based
encoder and a raw data encoder is active at the same time, but it's an
acceptable alternative.
Allows the ability for one encoder to defer to another in case of
failure or unsupported feature. Okay, fine, it's mostly a hack so the
new NVENC encoder can fall back to the FFmpeg encoder if NV12 textures
aren't in use, that way it does not have to implement raw fallback
support itself. The settings and properties are pretty much the same,
so there's no reason not to utilize it in order to save time that could
otherwise be spent more productively.
Returns the current version number of windows. The lowest byte is the
minor version number, then the next lowest byte is the major version
number. E.g. 0x601 for Windows 7, 0x602 for Windows 8, 0x603 for
Windows 8.1, and 0xA00 for Windows 10.
(This commit also modifies UI)
Adds a universal function for determining whether video output is
currently active, rather than having to use video_output_active() on the
value returned by obs_get_video().
If audio monitoring is enabled and set to output only, the
obs_source_show_preloaded_video function would still incorrectly set the
current source audio output timestamp to the current system time, which
would cause audio to use an incorrect starting point from long ago for
the first starting audio segment if audio monitoring is then turned off
some time after having started the source.
Instead, the starting timestamp should be set to 0 if audio monitoring
is enabled with no output to stream, so that if/when audio monitoring is
disabled, it recalculates the starting timestamp of the first audio
packet on the spot again.
Closesobsproject/obs-studio#1522
Certain windows functions may allow 0 as a valid handle value, therefore
INVALID_HANDLE_VALUE is a more appropriate initialization value.
Closesobsproject/obs-studio#1519
When calling obs_display_set_background_color, the value set in the
'color' parameter should always be used as-is. 0 should not indicate a
color other than black. To do anything otherwise is silly and confusing
for users of the API.
Closesobsproject/obs-studio#1516
Track 1 offset is reset but not the offset for other tracks.
This caused sync issues in between tracks (with track 1 and others).
(bug found by EposVox)
The pthread_setname_np manpage states:
The thread name is a meaningful C language string, whose length is
restricted to 16 characters, including the terminating null byte ('\0').
