[pulseaudio-discuss] [PATCH] Add HDMI Surround 7.1 profiles

Tue Jul 15 09:28:17 PDT 2014

13.07.2014 18:12, Tanu Kaskinen wrote:
> Someone (not me, at least any time soon) could write a simple
> patch that measures and logs (at error level - measurements shouldn't be
> done at debug log level) the time that the probing takes. Then test it
> on your development machine, and if the time seems negligible, try also
> e.g. plugging in a USB sound card to a Raspberry Pi.

Done. See the attachment.

Here are the results from my development machine (0 = Haswell HDMI 
audio, 1 = onboard analog output, 2 = Logitech C910 USB webcam):

E: [pulseaudio] alsa-mixer.c: Checking for profile input:analog-mono 
took 1344 usec
E: [pulseaudio] alsa-mixer.c: Checking for profile input:analog-stereo 
took 3461 usec
E: [pulseaudio] alsa-mixer.c: Checking for profile input:iec958-stereo 
took 235 usec
E: [pulseaudio] alsa-mixer.c: Checking for profile output:analog-mono 
took 140 usec
E: [pulseaudio] alsa-mixer.c: Checking for profile output:analog-stereo 
took 272 usec
E: [pulseaudio] alsa-mixer.c: Checking for profile 
output:analog-surround-21 took 260 usec
E: [pulseaudio] alsa-mixer.c: Checking for profile 
output:analog-surround-40 took 244 usec
E: [pulseaudio] alsa-mixer.c: Checking for profile 
output:analog-surround-41 took 166 usec
E: [pulseaudio] alsa-mixer.c: Checking for profile 
output:analog-surround-50 took 140 usec
E: [pulseaudio] alsa-mixer.c: Checking for profile 
output:analog-surround-51 took 150 usec
E: [pulseaudio] alsa-mixer.c: Checking for profile 
output:analog-surround-71 took 143 usec
E: [pulseaudio] alsa-mixer.c: Checking for profile output:iec958-stereo 
took 167 usec
E: [pulseaudio] alsa-mixer.c: Checking for profile 
output:iec958-ac3-surround-40 took 10 usec
E: [pulseaudio] alsa-mixer.c: Checking for profile 
output:iec958-ac3-surround-51 took 7 usec
E: [pulseaudio] alsa-mixer.c: Checking for profile 
output:iec958-dts-surround-51 took 330 usec
E: [pulseaudio] alsa-mixer.c: Checking for profile output:hdmi-stereo 
took 5823 usec
E: [pulseaudio] alsa-mixer.c: Checking for profile output:hdmi-surround 
took 1555 usec
E: [pulseaudio] alsa-mixer.c: Checking for profile 
output:hdmi-stereo-extra1 took 730 usec
E: [pulseaudio] alsa-mixer.c: Checking for profile 
output:hdmi-surround-extra1 took 1861 usec
E: [pulseaudio] alsa-mixer.c: Checking for profile 
output:hdmi-stereo-extra2 took 2790 usec
E: [pulseaudio] alsa-mixer.c: Checking for profile 
output:hdmi-surround-extra2 took 2782 usec
E: [pulseaudio] alsa-mixer.c: Checking for profile 
output:hdmi-stereo-extra3 took 162 usec
E: [pulseaudio] alsa-mixer.c: Checking for profile 
output:hdmi-surround-extra3 took 148 usec
E: [pulseaudio] alsa-mixer.c: Checking for all profiles on device 0 took 
24494 usec in total
E: [pulseaudio] alsa-mixer.c: Checking for profile input:analog-mono 
took 521 usec
E: [pulseaudio] alsa-mixer.c: Checking for profile input:analog-stereo 
took 23234 usec
E: [pulseaudio] alsa-mixer.c: Checking for profile 
input:analog-4-channel-input took 504 usec
E: [pulseaudio] alsa-mixer.c: Checking for profile input:iec958-stereo 
took 23521 usec
E: [pulseaudio] alsa-mixer.c: Checking for profile output:analog-mono 
took 94 usec
E: [pulseaudio] alsa-mixer.c: Checking for profile output:analog-stereo 
took 233 usec
E: [pulseaudio] alsa-mixer.c: Checking for profile 
output:analog-surround-21 took 213 usec
E: [pulseaudio] alsa-mixer.c: Checking for profile 
output:analog-surround-40 took 218 usec
E: [pulseaudio] alsa-mixer.c: Checking for profile 
output:analog-surround-41 took 170 usec
E: [pulseaudio] alsa-mixer.c: Checking for profile 
output:analog-surround-50 took 170 usec
E: [pulseaudio] alsa-mixer.c: Checking for profile 
output:analog-surround-51 took 166 usec
E: [pulseaudio] alsa-mixer.c: Checking for profile 
output:analog-surround-71 took 209 usec
E: [pulseaudio] alsa-mixer.c: Checking for profile output:iec958-stereo 
took 228 usec
E: [pulseaudio] alsa-mixer.c: Checking for profile 
output:iec958-ac3-surround-40 took 8 usec
E: [pulseaudio] alsa-mixer.c: Checking for profile 
output:iec958-ac3-surround-51 took 7 usec
E: [pulseaudio] alsa-mixer.c: Checking for profile 
output:iec958-dts-surround-51 took 250 usec
E: [pulseaudio] alsa-mixer.c: Checking for profile output:hdmi-stereo 
took 88 usec
E: [pulseaudio] alsa-mixer.c: Checking for all profiles on device 2 took 
52647 usec in total
E: [pulseaudio] alsa-mixer.c: Checking for profile input:analog-mono 
took 154724 usec
E: [pulseaudio] alsa-mixer.c: Checking for profile input:analog-stereo 
took 2181 usec
E: [pulseaudio] alsa-mixer.c: Checking for profile input:iec958-stereo 
took 185 usec
E: [pulseaudio] alsa-mixer.c: Checking for profile output:analog-mono 
took 528 usec
E: [pulseaudio] alsa-mixer.c: Checking for profile output:analog-stereo 
took 10556 usec
E: [pulseaudio] alsa-mixer.c: Checking for profile 
output:analog-stereo+input:analog-stereo took 246 usec
E: [pulseaudio] alsa-mixer.c: Checking for profile 
output:analog-surround-21 took 5866 usec
E: [pulseaudio] alsa-mixer.c: Checking for profile 
output:analog-surround-21+input:analog-stereo took 197 usec
E: [pulseaudio] alsa-mixer.c: Checking for profile 
output:analog-surround-40 took 5479 usec
E: [pulseaudio] alsa-mixer.c: Checking for profile 
output:analog-surround-40+input:analog-stereo took 210 usec
E: [pulseaudio] alsa-mixer.c: Checking for profile 
output:analog-surround-41 took 5484 usec
E: [pulseaudio] alsa-mixer.c: Checking for profile 
output:analog-surround-41+input:analog-stereo took 218 usec
E: [pulseaudio] alsa-mixer.c: Checking for profile 
output:analog-surround-50 took 332 usec
E: [pulseaudio] alsa-mixer.c: Checking for profile 
output:analog-surround-50+input:analog-stereo took 193 usec
E: [pulseaudio] alsa-mixer.c: Checking for profile 
output:analog-surround-51 took 281 usec
E: [pulseaudio] alsa-mixer.c: Checking for profile 
output:analog-surround-51+input:analog-stereo took 256 usec
E: [pulseaudio] alsa-mixer.c: Checking for profile 
output:analog-surround-71 took 1150 usec
E: [pulseaudio] alsa-mixer.c: Checking for profile output:iec958-stereo 
took 4835 usec
E: [pulseaudio] alsa-mixer.c: Checking for profile 
output:iec958-stereo+input:analog-stereo took 200 usec
E: [pulseaudio] alsa-mixer.c: Checking for profile 
output:iec958-ac3-surround-40 took 17 usec
E: [pulseaudio] alsa-mixer.c: Checking for profile 
output:iec958-ac3-surround-51 took 16 usec
E: [pulseaudio] alsa-mixer.c: Checking for profile 
output:iec958-dts-surround-51 took 5209 usec
E: [pulseaudio] alsa-mixer.c: Checking for profile 
output:iec958-dts-surround-51+input:analog-stereo took 225 usec
E: [pulseaudio] alsa-mixer.c: Checking for profile output:hdmi-stereo 
took 186 usec
E: [pulseaudio] alsa-mixer.c: Checking for profile output:hdmi-surround 
took 182 usec
E: [pulseaudio] alsa-mixer.c: Checking for profile 
output:hdmi-stereo-extra1 took 180 usec
E: [pulseaudio] alsa-mixer.c: Checking for profile 
output:hdmi-surround-extra1 took 177 usec
E: [pulseaudio] alsa-mixer.c: Checking for profile 
output:hdmi-stereo-extra2 took 171 usec
E: [pulseaudio] alsa-mixer.c: Checking for profile 
output:hdmi-surround-extra2 took 171 usec
E: [pulseaudio] alsa-mixer.c: Checking for profile 
output:hdmi-stereo-extra3 took 169 usec
E: [pulseaudio] alsa-mixer.c: Checking for profile 
output:hdmi-surround-extra3 took 196 usec
E: [pulseaudio] alsa-mixer.c: Checking for all profiles on device 1 took 
205055 usec in total

Note: I have not configured the "a52" ALSA pcm for the AC3 encoder, thus 
probing of AC3 profiles fails and takes less than 20 usec. dcaenc is 
installed, and thus iec958-dts-surround-51 eats 5 ms.

Details from more interesting machines (with a TV tuner, and a USB 
headset) will follow tomorrow. Unfortunately, I don't have access to a 
Raspberry Pi.

-- 
Alexander E. Patrakov
-------------- next part --------------
A non-text attachment was scrubbed...
Name: 0001-alsa-Report-profile-probing-timings.patch
Type: text/x-patch
Size: 2473 bytes
Desc: not available
URL: <http://lists.freedesktop.org/archives/pulseaudio-discuss/attachments/20140715/1386637a/attachment-0001.bin>