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bug fix: if small network buffers are used we get much better audio quality when drop outs occur

This commit is contained in:
Volker Fischer 2020-04-23 19:36:00 +02:00
parent 3e715423c1
commit 009f30b4df
4 changed files with 12 additions and 4 deletions
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4
ChangeLog
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@ -15,6 +15,8 @@
* added bodhran instrument icon, created by bomm (Ticket #131)
* bug fix: if small network buffers are used we get much better audio quality when drop outs occur
* bug fix: if names given with the -o option were too long, the server registration failed (Ticket #91)
* bug fix: audio level changes if Buffer Delay is changed (Ticket #106)
@ -28,8 +30,6 @@ TODO support internationalization
TODO sometimes I cannot see the central server in the server list
TODO improve audio drop out behaviour with OPUS64 by tuning the coding rate (it seems that for some coding rates we get loud artifacts on audio drop outs whereas for slightly different rates the behavior is much more pleasent), maybe test with OPUS complexity settings, quality settings, etc to improve PLC
TODO try to find a way to catch Windows exceptions in case a 64 bit Jamulus tries to load a 32 bit Jack Audio ASIO dll

4
src/client.cpp
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@ -104,6 +104,10 @@ CClient::CClient ( const quint16 iPortNumber,
opus_custom_encoder_ctl ( Opus64EncoderMono, OPUS_SET_VBR ( 0 ) );
opus_custom_encoder_ctl ( Opus64EncoderStereo, OPUS_SET_VBR ( 0 ) );
// for 64 samples frame size we have to adjust the PLC behavior to avoid loud artifacts
opus_custom_encoder_ctl ( Opus64EncoderMono, OPUS_SET_PACKET_LOSS_PERC ( 35 ) );
opus_custom_encoder_ctl ( Opus64EncoderStereo, OPUS_SET_PACKET_LOSS_PERC ( 35 ) );
// we want as low delay as possible
opus_custom_encoder_ctl ( OpusEncoderMono, OPUS_SET_APPLICATION ( OPUS_APPLICATION_RESTRICTED_LOWDELAY ) );
opus_custom_encoder_ctl ( OpusEncoderStereo, OPUS_SET_APPLICATION ( OPUS_APPLICATION_RESTRICTED_LOWDELAY ) );

4
src/client.h
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@ -85,14 +85,14 @@
// N: number of bytes per packet (values below)
#define OPUS_NUM_BYTES_MONO_LOW_QUALITY 12
#define OPUS_NUM_BYTES_MONO_NORMAL_QUALITY 22
#define OPUS_NUM_BYTES_MONO_HIGH_QUALITY 35
#define OPUS_NUM_BYTES_MONO_HIGH_QUALITY 36
#define OPUS_NUM_BYTES_MONO_LOW_QUALITY_DBLE_FRAMESIZE 25
#define OPUS_NUM_BYTES_MONO_NORMAL_QUALITY_DBLE_FRAMESIZE 45
#define OPUS_NUM_BYTES_MONO_HIGH_QUALITY_DBLE_FRAMESIZE 71
#define OPUS_NUM_BYTES_STEREO_LOW_QUALITY 24
#define OPUS_NUM_BYTES_STEREO_NORMAL_QUALITY 35
#define OPUS_NUM_BYTES_STEREO_HIGH_QUALITY 72
#define OPUS_NUM_BYTES_STEREO_HIGH_QUALITY 73
#define OPUS_NUM_BYTES_STEREO_LOW_QUALITY_DBLE_FRAMESIZE 47
#define OPUS_NUM_BYTES_STEREO_NORMAL_QUALITY_DBLE_FRAMESIZE 71
#define OPUS_NUM_BYTES_STEREO_HIGH_QUALITY_DBLE_FRAMESIZE 142

4
src/server.cpp
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@ -286,6 +286,10 @@ CServer::CServer ( const int iNewMaxNumChan,
opus_custom_encoder_ctl ( Opus64EncoderMono[i], OPUS_SET_VBR ( 0 ) );
opus_custom_encoder_ctl ( Opus64EncoderStereo[i], OPUS_SET_VBR ( 0 ) );
// for 64 samples frame size we have to adjust the PLC behavior to avoid loud artifacts
opus_custom_encoder_ctl ( Opus64EncoderMono[i], OPUS_SET_PACKET_LOSS_PERC ( 35 ) );
opus_custom_encoder_ctl ( Opus64EncoderStereo[i], OPUS_SET_PACKET_LOSS_PERC ( 35 ) );
// we want as low delay as possible
opus_custom_encoder_ctl ( OpusEncoderMono[i], OPUS_SET_APPLICATION ( OPUS_APPLICATION_RESTRICTED_LOWDELAY ) );
opus_custom_encoder_ctl ( OpusEncoderStereo[i], OPUS_SET_APPLICATION ( OPUS_APPLICATION_RESTRICTED_LOWDELAY ) );