Hi Georg, As i told module-loopback is giving overall latency around 300ms from the time when i started the sequence, and *latency of module-loopback doesn't grow at any point of time*. On saturday and sunday, we have kept a continuous streaming for 2 days, expecting that the delay will be further increased, but the delay is constant with 4-5 secs, and *there are no errors in the logs*. Are there any chances like alsa-sink is filling somewhere and blocking the source to send the audio chunks into the memblockq?
*module-loopback output is like this:* *Tue Jul 31 10:15:37 2018 user.debug pulseaudio[4370]: (47917.422| 0.020) [alsa-sink-I2S cx2072x-dsp-0] alsa-sink.c: Wakeup from ALSA!* *Tue Jul 31 10:15:37 2018 user.debug pulseaudio[4370]: (47917.443| 0.020) [pulseaudio] module-loopback.c: Loopback overall latency is 0.02 ms + 244.43 ms + 54.55 ms = 298.89 ms* *Tue Jul 31 10:15:37 2018 user.debug pulseaudio[4370]: (47917.443| 0.000) [pulseaudio] module-loopback.c: Loopback latency at base rate is 298.42 ms* *Tue Jul 31 10:15:37 2018 user.debug pulseaudio[4370]: (47917.443| 0.000) [pulseaudio] module-loopback.c: [alsa_output.0] Updated sampling rate to 44053 Hz.* *pactl list sources:* *Source #1* * State: RUNNING* * Name: bluez_source* * Description: AP 🙏* * Driver: module-bluez5-device.c* * Sample Specification: s16le 2ch 44100Hz* * Channel Map: front-left,front-right* * Owner Module: 17* * Mute: no* * Volume: front-left: 65536 / 100% / 0.00 dB, front-right: 65536 / 100% / 0.00 dB* * balance 0.00* * Base Volume: 65536 / 100% / 0.00 dB* * Monitor of Sink: n/a* * Latency: 45876 usec, configured 39512 usec* * Flags: HARDWARE DECIBEL_VOLUME LATENCY * * Properties:* * bluetooth.protocol = "a2dp_source"* * device.description = "AP 🙏"* * device.string = "AC:C1:EE:69:A6:02"* * device.api = "bluez"* * device.class = "sound"* * device.bus = "bluetooth"* * device.form_factor = "phone"* * bluez.path = "/org/bluez/hci0/dev_AC_C1_EE_69_A6_02"* * bluez.class = "0x5a020c"* * bluez.alias = "AP 🙏"* * device.icon_name = "audio-card-bluetooth"* * Ports:* * phone-input: Phone (priority: 0, available)* * Active Port: phone-input* * Formats:* * pcm* *pactl list sinks:* *Sink #0* * State: RUNNING* * Name: alsa_output.0* * Description: ipq4019_snd_card* * Driver: module-alsa-sink.c* * Sample Specification: s16le 2ch 48000Hz* * Channel Map: front-left,front-right* * Owner Module: 5* * Mute: no* * Volume: front-left: 65536 / 100% / 0.00 dB, front-right: 65536 / 100% / 0.00 dB* * balance 0.00* * Base Volume: 65536 / 100% / 0.00 dB* * Monitor Source: alsa_output.0.monitor* * Latency: 0 usec, configured 26000 usec* * Flags: HARDWARE DECIBEL_VOLUME LATENCY * * Properties:* * alsa.resolution_bits = "16"* * device.api = "alsa"* * device.class = "sound"* * alsa.class = "generic"* * alsa.subclass = "generic-mix"* * alsa.name <http://alsa.name> = ""* * alsa.id <http://alsa.id> = "I2S cx2072x-dsp-0"* * alsa.subdevice = "0"* * alsa.subdevice_name = "subdevice #0"* * alsa.device = "0"* * alsa.card = "0"* * alsa.card_name = "snd_card"* * alsa.long_card_name = "snd_card"* * alsa.driver_name = "snd_card"* * device.string = "dmixer"* * device.buffering.buffer_size = "383040"* * device.buffering.fragment_size = "4032"* * device.access_mode = "mmap+timer"* * device.description = "snd_card"* * device.icon_name = "audio-card"* * Formats:* * pcm* On Sun, Jul 29, 2018 at 9:37 PM Georg Chini <ge...@chini.tk> wrote: > On 29.07.2018 18:03, Georg Chini wrote: > > On 29.07.2018 12:44, Harish Gaddameedi wrote: > > Hi Georg, > > I was working on simple Openwrt Platform, and Source device is Android > phone Bluetooth with Youtube app 24 hrs live streaming video and alsa > device is speaker, which is hardwired > > The 12 hrs testing which i did on pulseaudio-11.1 are without my > modification. The basic modification which i made in the previous > pulseaudio-8.0 is with the idle state of bluez_source card (i.e., card is > vanishing when the song is in the pause state) and did some changes to > buffers of pulseaudio to reduce the latency. But in pulseaudio-11.1 i > didn't do all the changes as i didn't find any initial latency. but > periodic latency after 12hrs still exists. The issue is reproducible with > Gstreamer also. > > I haven't worked on microphone scenarios, I'm just working on music player > and speaker. > > Let me clear you some test scenarios for better understanding, > Case 1: Android phone as source (bluez_source) and device with internal > speaker (alsa-sink as sink for pulseaudio) -------> delay after 12hrs > exists. > Case 2: Device with Gstreamer as source and same device with internal > speaker (pulsesink with alsa card as sink for pulseaudio) ----------> > delay after 12 hrs exists. > Case 3: Device with Gstreamer as source and External Bluetooth speaker > (pulsesink with bluez_sink card) -----------> No delay after 12 hrs. > > What output does module-loopback give when you run with debugging? > Do you see the growing latency there? Does it show up with pactl list sinks > or pactl list sources? Any error messages in the PA log? > > Regards > Georg > > One more comment: It may well be worth trying 12.2 because the bluetooth > thread > function has changed. > -- Regards, Harish Gaddameedi
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