Avoids unnecessary calls to audio encoder.
As of this CL:
https://webrtc-review.googlesource.com/c/src/+/173704
...we now call AudioEncoder::OnReceivedOverhead() too often, since we
don't check if overhead has actually changed.
This CL rectifies that.
Bug: webrtc:10809
Change-Id: I0b86e0296a7860dde3e62e817f9b941fa82afe4a
Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/175009
Reviewed-by: Per Åhgren <peah@webrtc.org>
Commit-Queue: Erik Språng <sprang@webrtc.org>
Cr-Commit-Position: refs/heads/master@{#31279}
diff --git a/audio/audio_send_stream.cc b/audio/audio_send_stream.cc
index 8730c45..cdeea1a 100644
--- a/audio/audio_send_stream.cc
+++ b/audio/audio_send_stream.cc
@@ -544,10 +544,12 @@
}
void AudioSendStream::UpdateOverheadForEncoder() {
- const size_t overhead_per_packet_bytes = GetPerPacketOverheadBytes();
- if (overhead_per_packet_bytes == 0) {
- return; // Overhead is not known yet, do not tell the encoder.
+ size_t overhead_per_packet_bytes = GetPerPacketOverheadBytes();
+ if (overhead_per_packet_ == overhead_per_packet_bytes) {
+ return;
}
+ overhead_per_packet_ = overhead_per_packet_bytes;
+
channel_send_->CallEncoder([&](AudioEncoder* encoder) {
encoder->OnReceivedOverhead(overhead_per_packet_bytes);
});
diff --git a/audio/audio_send_stream.h b/audio/audio_send_stream.h
index 92e9a7f..5f8a936 100644
--- a/audio/audio_send_stream.h
+++ b/audio/audio_send_stream.h
@@ -195,6 +195,7 @@
static int TransportSeqNumId(const Config& config);
rtc::CriticalSection overhead_per_packet_lock_;
+ size_t overhead_per_packet_ RTC_GUARDED_BY(overhead_per_packet_lock_) = 0;
// Current transport overhead (ICE, TURN, etc.)
size_t transport_overhead_per_packet_bytes_
diff --git a/audio/audio_send_stream_unittest.cc b/audio/audio_send_stream_unittest.cc
index 60655e9..89f94cd 100644
--- a/audio/audio_send_stream_unittest.cc
+++ b/audio/audio_send_stream_unittest.cc
@@ -794,7 +794,7 @@
auto new_config = helper.config();
// CallEncoder will be called on overhead change.
- EXPECT_CALL(*helper.channel_send(), CallEncoder(::testing::_)).Times(1);
+ EXPECT_CALL(*helper.channel_send(), CallEncoder);
const size_t transport_overhead_per_packet_bytes = 333;
send_stream->SetTransportOverhead(transport_overhead_per_packet_bytes);
@@ -804,6 +804,27 @@
}
}
+TEST(AudioSendStreamTest, DoesntCallEncoderWhenOverheadUnchanged) {
+ for (bool use_null_audio_processing : {false, true}) {
+ ConfigHelper helper(false, true, use_null_audio_processing);
+ auto send_stream = helper.CreateAudioSendStream();
+ auto new_config = helper.config();
+
+ // CallEncoder will be called on overhead change.
+ EXPECT_CALL(*helper.channel_send(), CallEncoder);
+ const size_t transport_overhead_per_packet_bytes = 333;
+ send_stream->SetTransportOverhead(transport_overhead_per_packet_bytes);
+
+ // Set the same overhead again, CallEncoder should not be called again.
+ EXPECT_CALL(*helper.channel_send(), CallEncoder).Times(0);
+ send_stream->SetTransportOverhead(transport_overhead_per_packet_bytes);
+
+ // New overhead, call CallEncoder again
+ EXPECT_CALL(*helper.channel_send(), CallEncoder);
+ send_stream->SetTransportOverhead(transport_overhead_per_packet_bytes + 1);
+ }
+}
+
TEST(AudioSendStreamTest, AudioOverheadChanged) {
for (bool use_null_audio_processing : {false, true}) {
ConfigHelper helper(false, true, use_null_audio_processing);