When sources output NULL frames, it is generally used to disable the
source and prevent the last frame from being left on screen. However,
when the source begins outputting video again, the last frame is
still in the async cache.
Depending on the stability of the source's frame output, this still
frame can end up being shown for 5+ output frames.
By freeing the async cache when a NULL frame is submitted, we avoid
the issue of old frames being re-displayed.
Currently, ifdefs are used to determine if monitoring is supported.
This is difficult to maintain and restricts plugins from knowing if
monitoring is supported by OBS. This adds a runtime function to fix
that issue.
Adds support for using shared textures that were made with the
D3D11_RESOURCE_MISC_SHARED_NTHANDLE flag.
This increases the minimum required Windows version to Windows 8 or the
Platform Update for Windows 7. As official support is only for Win 8+
this does not change official support.
Previously we would wait for pulse to attempt to read from the monitor
source and obs buffered at least 5ms of audio data before we tried to
fill the buffer. In some cases this resulted in consistently triggering
underruns in pulse.
Instead we try to fill the buffer immediately as obs outputs audio data
and while the pa buffer is not full. We also stop trying to grow the
buffer to prevent underruns after we reach 1s of latency.
(This commit also modifies UI)
This makes it more trivial for encoder plugins to communicate to users
why specifically an encoder error might have occurred mid-stream.
When signed 32-bit audio arrived to pulseaudio-output and volume was
lowered, audio data was broken. In the function `process_volume`, the
type of the data is switched by `bytes_per_channel`. However the size of
signed 32-bit integer and the size of float are same so that the signed
32-bit integer is processed as float.
This commit changes these items.
- Use `format` instead of `bytes_per_channel` so that all the sample
types can be differentiated.
- Change `short` to `int16_t` and renames existing function
`process_short` to `process_s16` to clarify the function is
processing signed 16-bit.
Avoid nanosecond abstraction to reduce math operations.
Replace Sleep(0) with YieldProcessor(). We want the thread to remain
scheduled, the current CPU core to do less work, and the hyperthread
sibling to perform better.
Hacky profiling showed maybe 10-25 µs skid reduction per function call.
I think power/performance gains would be hard to measure, so I haven't
tried, but it would be shocking if they got worse.
Apparently, some audio filters do not check the audio channel/plane
count, and instead check to see if a pointer is valid. Instead of
requiring the caller to initialize these values to 0 manually (they
shouldn't have to), set them to zero upon input in
obs_source_output_audio() itself.
Closesobsproject/obs-studio#3744
Fixes a bug where if an audio source's implementation disappears (i.e.
a plugin vanishes or is removed), it would turn all mixing channels off,
effectively muting the source
Previously darray macros did not test the types of arguments so that
developers cannot notice even if a wrong type of a variable is passed.
This commit add a type test that relys on GCC's extension. Since OBS
Studio is built with GCC for Ubuntu, testing only under GCC is
sufficient to catch future bugs.
jp9000