The assumption that underflow and overbuffering are caused by jitter
(and that the delay between the producer and consumer will be caught up)
does not always hold.
For example, if the consumer does not consume at the expected rate (the
SDL callback is not called often enough, which is an audio output
issue), many samples will be dropped due to overbuffering, decreasing
the average buffering indefinitely.
Prevent the average buffering to become negative to limit the
consequences of an unexpected behavior.
PR #4572 <https://github.com/Genymobile/scrcpy/pull/4572>
The buffering level does not change continuously: it increases abruptly
when a packet is received, and decreases abruptly when an audio block is
consumed.
To estimate the buffering level, a rolling average is used.
To make the buffering more stable, increase the smoothness of this
rolling average. This decreases the risk of enabling audio compensation
due to an estimation error.
PR #4572 <https://github.com/Genymobile/scrcpy/pull/4572>
Use different thresholds for enabling and disabling compensation.
Concretely, enable compensation if the difference between the average
and the target buffering levels exceeds 4 ms (instead of 1 ms). This
avoids unnecessary compensation due to small noise in buffering level
estimation.
But keep a smaller threshold (1 ms) for disabling compensation, so that
the buffering level is restored closer to the target value. This avoids
to keep the actual level close to the compensation threshold.
PR #4572 <https://github.com/Genymobile/scrcpy/pull/4572>
The audio output thread only reads samples from the buffer, and most of
the time, the audio receiver thread only writes samples to the buffer.
In these cases, using atomics avoids lock contention.
There are still corner cases where the audio receiver thread needs to
"read" samples (and drop them), so lock only in these cases.
PR #4572 <https://github.com/Genymobile/scrcpy/pull/4572>
Power on the device on start only if video capture is enabled.
Note that it only impacts display mirroring, since control is completely
disabled if video source is camera.
Refs 110b3a16f6d02124a4567d2ab79fcb74d78f949f
For AV1, the config packet must not be merged with the next non-config
packet.
This fixes the following error when passing --video-codec=av1:
> INFO: [FFmpeg] libdav1d 1.3.0
> ERROR: [FFmpeg] Unknown OBU type 0 of size 29393
> ERROR: [FFmpeg] Error parsing OBU data
> ERROR: Decoder 'video': could not send video packet: -1094995529
PR #4487 <https://github.com/Genymobile/scrcpy/pull/4487>
The SDL video subsystem may be initialized so that clipboard
synchronization works even without video playback.
But if the video subsystem initialization fails (e.g. because no video
device is available), consider it as an error only if video playback is
enabled.
Refs 5e59ed31352251791679e5931d7e5abf0c2d18f6
Fixes#4477 <https://github.com/Genymobile/scrcpy/issues/4477>
Fix the following warning/error:
../app/src/cli.c:2158:17: warning: a label can only be part of a
statement and a declaration is not a statement [-Wpedantic]
With some compilers, this is an error rather than a pedantic warning.
Refs <https://github.com/Genymobile/scrcpy/issues/2256#issuecomment-1467008307>
Audio PTS are retrieved by AudioRecord.getTimestamp(), so they do not
necessarily exactly match the number of samples (this allows to take
drift and lag into account).
As a consequence, two consecutive timestamps in microseconds may
sometimes end up within the same millisecond, causing the warning. This
is particularly true for the Matroska muxer which uses a timebase of
1/1000 (1 ms precision).
Since this is "expected", lower the log level from warning to debug.
FLAC is not low latency: the default encoder produces blocks of 4096
samples, which represent ~85.333ms.
Increase the audio buffer by default so that audio playback works.
Clipboard synchronization requires SDL_INIT_VIDEO, so always initialize
the video subsystem, even if --no-video or --no-video-playback is
passed.
Refs caf594c90ef1b71ed844b2a9b42c3b3371215d6f
Fixes#4418 <https://github.com/Genymobile/scrcpy/issues/4418>
Add --camera-high-speed to enable high frame rate camera capture. If
the option is enabled, then --camera-fps is mandatory.
PR #4213 <https://github.com/Genymobile/scrcpy/pull/4213>
Co-authored-by: Romain Vimont <rom@rom1v.com>
Signed-off-by: Andrew Gunnerson <accounts+github@chiller3.com>
Signed-off-by: Romain Vimont <rom@rom1v.com>
Add a new option for specifying the camera frame rate.
By default, Android's default frame rate (30 fps) is used.
PR #4213 <https://github.com/Genymobile/scrcpy/pull/4213>
Signed-off-by: Andrew Gunnerson <accounts+github@chiller3.com>
Signed-off-by: Romain Vimont <rom@rom1v.com>
In addition to --camera-size to specify an explicit size, make it
possible to select the camera size automatically, respecting the maximum
size (already used for display mirroring) and an aspect ratio.
For example, "scrcpy --video-source=camera" followed by:
- (no additional arguments)
: mirrors at the maximum size, any a-r
- -m1920
: only consider valid sizes having both dimensions not above 1920
- --camera-ar=4:3
: only consider valid sizes having an aspect ratio of 4:3 (+/- 10%)
- -m2048 --camera-ar=1.6
: only consider valid sizes having both dimensions not above 2048
and an aspect ratio of 1.6 (+/- 10%)
PR #4213 <https://github.com/Genymobile/scrcpy/pull/4213>
Co-authored-by: Simon Chan <1330321+yume-chan@users.noreply.github.com>
Add an option to select the camera by its lens facing (front, back or
external).
PR #4213 <https://github.com/Genymobile/scrcpy/pull/4213>
Co-authored-by: Romain Vimont <rom@rom1v.com>
Signed-off-by: Romain Vimont <rom@rom1v.com>
If --audio-source is not specified, select the default value
according to the video source:
- for display mirroring, use device audio by default;
- for camera mirroring, use microphone by default.
PR #4213 <https://github.com/Genymobile/scrcpy/pull/4213>
The option is named "display id" everywhere.
This will be consistent with --camera-id (there will be many camera
options, so an option --camera would be confusing).
PR #4213 <https://github.com/Genymobile/scrcpy/pull/4213>
