Allow TimestampAligner to translate timestamp without new observation of system clock.
Bug: chromium:1054403
Change-Id: I32c622851fc0bed2c47ae142c743399acb91ae84
Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/169924
Commit-Queue: Minyue Li <minyue@webrtc.org>
Reviewed-by: Karl Wiberg <kwiberg@webrtc.org>
Reviewed-by: Niels Moller <nisse@webrtc.org>
Cr-Commit-Position: refs/heads/master@{#30744}
diff --git a/rtc_base/timestamp_aligner.cc b/rtc_base/timestamp_aligner.cc
index 8bbcdb5..c9f8f9d 100644
--- a/rtc_base/timestamp_aligner.cc
+++ b/rtc_base/timestamp_aligner.cc
@@ -23,15 +23,22 @@
: frames_seen_(0),
offset_us_(0),
clip_bias_us_(0),
- prev_translated_time_us_(std::numeric_limits<int64_t>::min()) {}
+ prev_translated_time_us_(std::numeric_limits<int64_t>::min()),
+ prev_time_offset_us_(0) {}
TimestampAligner::~TimestampAligner() {}
int64_t TimestampAligner::TranslateTimestamp(int64_t capturer_time_us,
int64_t system_time_us) {
- return ClipTimestamp(
+ const int64_t translated_timestamp = ClipTimestamp(
capturer_time_us + UpdateOffset(capturer_time_us, system_time_us),
system_time_us);
+ prev_time_offset_us_ = translated_timestamp - capturer_time_us;
+ return translated_timestamp;
+}
+
+int64_t TimestampAligner::TranslateTimestamp(int64_t capturer_time_us) const {
+ return capturer_time_us + prev_time_offset_us_;
}
int64_t TimestampAligner::UpdateOffset(int64_t capturer_time_us,
