This is version 7 of the loopback patch series. It includes many fixes based on Tanu's review as well as two new features. The main changes compared to the original loopback module are: - Reduce latency jitter by a factor 100 from around 30 ms to 300 usec - Implement modified P-controller and optimize adaptive re-sampling - Underrun protection - Latency initialisation to avoid underruns - Adjust to specified latency if possible, else use minimum possible latency - Allow smooth switching between different sources and sinks - Wait for source and sink to start up (new in v7) - Gracefully handle changes of port latency offsets (new in v7) - some new parameters Results achieved with the new code and theoretical background can be found at https://www.freedesktop.org/software/pulseaudio/misc/rate_estimator.odt Georg Chini (22): loopback: Rename sink_input_buffer to loopback_memblockq_length loopback: correct comments about the thread calling a function loopback: Initialize latency at startup and during source/sink changes loopback: Do not skip audio at startup loopback: Calculate and track minimum possible latency loopback: Add hooks to track port latency offsets loopback: Reset sink input rate when source or sink changes loopback: Implement underrun protection sample.c: Allow module-loopback to exceed PA_RATE_MAX source/sink: Allow pa_{source,sink}_get_latency_within_thread() to return negative values source/sink: Don't let pa_{sink, source}_getLatency_within_thread() return -1 if process_msg() fails loopback: Use new feature of pa_{source,sink}_get_latency_within_thread() loopback: Track and use average adjust time loopback: Limit controller step size to 2.01â?° loopback: Optimize adaptive re-sampling loopback: Add latency prediction and Kalman filter loopback: Track prediction error; debug and cosmetic changes loopback: Add adjust_threshold_usec parameter loopback: Only use controller weight after target latency has been crossed twice loopback: Add low_device_latency parameter loopback: Add adjust_time_msec parameter to allow adjust times below 1s loopback: Add log_interval and log_interval_msec parameter src/modules/alsa/alsa-sink.c | 13 +- src/modules/alsa/alsa-source.c | 8 +- src/modules/bluetooth/module-bluez4-device.c | 16 +- src/modules/bluetooth/module-bluez5-device.c | 10 +- src/modules/echo-cancel/module-echo-cancel.c | 16 +- src/modules/jack/module-jack-sink.c | 12 +- src/modules/jack/module-jack-source.c | 2 +- src/modules/macosx/module-coreaudio-device.c | 4 +- src/modules/module-combine-sink.c | 5 +- src/modules/module-equalizer-sink.c | 6 +- src/modules/module-esound-sink.c | 2 +- src/modules/module-ladspa-sink.c | 6 +- src/modules/module-loopback.c | 1072 +++++++++++++++++++++++--- src/modules/module-null-sink.c | 2 +- src/modules/module-null-source.c | 2 +- src/modules/module-pipe-sink.c | 2 +- src/modules/module-pipe-source.c | 2 +- src/modules/module-remap-sink.c | 6 +- src/modules/module-remap-source.c | 6 +- src/modules/module-sine-source.c | 2 +- src/modules/module-solaris.c | 2 +- src/modules/module-tunnel-sink-new.c | 10 +- src/modules/module-tunnel-source-new.c | 12 +- src/modules/module-tunnel.c | 4 +- src/modules/module-virtual-sink.c | 8 +- src/modules/module-virtual-source.c | 6 +- src/modules/module-virtual-surround-sink.c | 6 +- src/modules/module-waveout.c | 2 +- src/modules/oss/module-oss.c | 2 +- src/modules/raop/raop-sink.c | 11 +- src/modules/rtp/module-rtp-recv.c | 2 +- src/pulse/sample.c | 5 +- src/pulsecore/core.h | 2 + src/pulsecore/protocol-native.c | 6 +- src/pulsecore/sink-input.c | 2 +- src/pulsecore/sink.c | 31 +- src/pulsecore/sink.h | 2 +- src/pulsecore/source-output.c | 4 +- src/pulsecore/source.c | 27 +- src/pulsecore/source.h | 2 +- 40 files changed, 1086 insertions(+), 254 deletions(-) -- 2.10.1
