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authorPaul Adenot <[email protected]>2024-05-22 15:08:36 +0200
committerPaul Adenot <[email protected]>2024-05-22 15:13:58 +0200
commitd52193ada50329b7805f2e946d9c157f88b7eedc (patch)
treeaee64899fbdf7155f3212783d8edd2a4d2078d8f /src/cubeb_aaudio.cpp
parent6c1a6e151c1f981a2800d40af7c041cfcccc710e (diff)
downloadcubeb-d52193ada50329b7805f2e946d9c157f88b7eedc.tar.gz
cubeb-d52193ada50329b7805f2e946d9c157f88b7eedc.zip
Clamp to positive value when computing latency for an output streamfix-negative-latency-aaudio
Diagnosed by [email protected], the same code is also found in Chromium.
Diffstat (limited to 'src/cubeb_aaudio.cpp')
-rw-r--r--src/cubeb_aaudio.cpp8
1 files changed, 5 insertions, 3 deletions
diff --git a/src/cubeb_aaudio.cpp b/src/cubeb_aaudio.cpp
index 8b5eb23..915faee 100644
--- a/src/cubeb_aaudio.cpp
+++ b/src/cubeb_aaudio.cpp
@@ -644,9 +644,11 @@ aaudio_get_latency(cubeb_stream * stm, aaudio_direction_t direction,
// Extrapolate from the known timestamp for a particular frame presented.
int64_t app_frame_hw_time = hw_tstamp + frame_time_delta;
// For an output stream, the latency is positive, for an input stream, it's
- // negative.
- int64_t latency_ns = is_output ? app_frame_hw_time - signed_tstamp_ns
- : signed_tstamp_ns - app_frame_hw_time;
+ // negative. It can happen in some instances, e.g. around start of the stream
+ // that the latency for output is negative, return 0 in this case.
+ int64_t latency_ns = is_output
+ ? std::max(0ll, app_frame_hw_time - signed_tstamp_ns)
+ : signed_tstamp_ns - app_frame_hw_time;
int64_t latency_frames = stm->sample_rate * latency_ns / NS_PER_S;
LOGV("Latency in frames (%s): %d (%dms)", is_output ? "output" : "input",