Re: [pulseaudio-discuss] [WIP] Passthrough support
On 25.03.2011 03:35, Dark Shadow wrote:
> Unless I am missing something all the movies I play say 48kHz on my
> receivers OSD when played through my PS3 so I thought that was the
> best they have, and higher was not used on average Blu-Ray's.
>
> If they have better why is it not being used considering my receiver
> supports it. I know from this dmesg output
The sample rates outputted in dmesg and in /proc by ALSA are incorrect
due to a kernel bug.
48000 88200 176400 192000 384000
in your log means
44100 48000 88200 96000 176400 (+192000)
Basically there is a bitfield of
static unsigned int rates[] =
{ 5512, 8000, 11025, 16000, 22050, 32000, 44100,
48000, 64000, 88200, 96000, 176400, 192000 };
which gets interpreted as:
static unsigned int rates[] = {
8000, 11025, 16000, 22050, 32000, 44100, 48000, 88200,
96000, 176400, 192000, 384000 };
so the wrong values are printed and possible 192000 is not printed at all.
> [ 182.696452] HDMI: detected monitor TX-SR608
> [ 182.696456] at connection type HDMI
> [ 182.696462] HDMI: available speakers: FL/FR LFE FC RL/RR RLC/RRC
> [ 182.696472] HDMI: supports coding type LPCM: channels = 2, rates =
> 44100 48000 88200 176400 192000 384000, bits = 16 20 24
> [ 182.696481] HDMI: supports coding type LPCM: channels = 8, rates =
> 44100 48000 88200 176400 192000 384000, bits = 16 20 24
> [ 182.696489] HDMI: supports coding type AC-3: channels = 8, rates =
> 44100 48000 88200, max bitrate = 64
> [ 182.696495] HDMI: supports coding type DTS: channels = 8, rates =
> 48000 88200, max bitrate = 1536000
> [ 182.696501] HDMI: supports coding type DSD (One Bit Audio):
> channels = 6, rates = 48000
> [ 182.696507] HDMI: supports coding type E-AC-3/DD+ (Dolby Digital
> Plus): channels = 8, rates = 48000 88200
> [ 182.696514] HDMI: supports coding type DTS-HD: channels = 8, rates
> = 48000 88200 176400 192000 384000
> [ 182.696520] HDMI: supports coding type MLP (Dolby TrueHD): channels
> = 8, rates = 88200 192000
> ___
> pulseaudio-discuss mailing list
> pulseaudio-discuss@mail.0pointer.de
> https://tango.0pointer.de/mailman/listinfo/pulseaudio-discuss
--
Anssi Hannula
___
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Re: [pulseaudio-discuss] [WIP] Passthrough support
On 25.03.2011 02:58, Dark Shadow wrote: > On Thu, Mar 24, 2011 at 10:50 AM, Anssi Hannula wrote: >> On 24.03.2011 16:18, pl bossart wrote: >>>> It seems that 384k sample rates aren't supported directly in alsa, I did >>>> some patching to no avail yet. >>>> >>>> In any case if the channel count can be specified with passthrough the >>>> following should work. >>>> >>>> paplay --raw --channels=2 --rate=192000 --passthrough File.dts.spdif192khz >>>> ( >>>> this works). >>>> >>>> paplay --raw --channels=4 --rate=192000 --passthrough File.dts.spdif384khz >>>> ( >>>> this fails). >>>> >>>> To passthrough dolby true-hd it looks like it'll be necessary for more than >>>> two channels to work. >>> >>> There was a thread on dts-hd in alsa-devel at some point. Anssi >>> (cc:ed) contributed some patches for HDMI and provided the information >>> below on ffmpeg configurations. >>> You may want to try at the alsa level before trying with pulseaudio to >>> make sure your setup is correct. I tend to believe you have to go for >>> 8ch @ 192kHz to make this work based on my limited understanding of >>> HBR. >> >> Indeed for HBR you need to always specify 8 channels and use rate to >> control the final rate (i.e. you either use "normal" 2 channel >> passthrough or HBR 8 channel passthrough). >> >> For example to passthrough the abovementioned 384 kHz stream you need to >> use 8 channels and rate of 96000. However, I think 384kHz DTS bitstream >> is generally *not* supported by A/V receivers, so you probably want to >> use 768kHz (8 channels, 192kHz). >> >> (note: I haven't tested whether HBR works with pulseaudio or not) >> >> >>> The DTS-HD part is not merged yet (patch is in ffmpeg-devel@), but the >>> TrueHD and E-AC-3 support is already there in ffmpeg trunk. >>> >>> The ffmpeg commandline to use is: >>> ffmpeg -i input.file -f spdif output.spdif >>> >>> For DTS-HD files, to get full passthrough (i.e. not only core), a >>> -dtshd_rate parameter is needed, which sets the output IEC958 rate. >>> ffmpeg -i input.file -f spdif -dtshd_rate 192000 output.spdif >>> ffmpeg -i input.file -f spdif -dtshd_rate 768000 output.spdif >>> 192000Hz is enough for streams that have a bitrate below 6.144Mbps, which >>> means all DTS-HD High Resolution Audio files and even many of the DTS-HD >>> Master Audio (the latter are lossless VBR). >>> >>> To play the spdif files back, I use >>> aplay -D hdmi:CARD=$CARDNAME,DEV=$DEVICENUM,AES0=0x06 -c $CHANCOUNT -r >>> $RATE file.spdif >>> >>> - replacing $CARDNAME with the card name >>> - replacing $DEVICENUM with 0..3 depending on card and hdmi port (for >>> non-zero DEVICENUM you'll need a patch from alsa git: >>> http://git.alsa-project.org/?p=alsa-lib.git;a=commitdiff;h=e6d5dcf1f625984605d362338d71162de45a6c60 >>> ) >>> - set $CHANCOUNT and $RATE as per below >>> - rate 192000 and channels 2 for IEC958 rate 192 kHz (for e.g. 48 kHz >>> E-AC-3, and DTS-HD when the IEC958 rate was set to 192000 in ffmpeg) >>> - rate 192000 and channels 8 for IEC958 rate 768 kHz (for most TrueHD >>> files, and for DTS-HD when the rate was set to 768000) >>> - note that having the 0x02 bit (non-pcm) set in AES0 is mandatory when >>> $CHANCOUNT is larger than 2, as ALSA uses it to determine whether to use >>> HBR or not. The additional 0x04 (non-copyright) I use above is not >>> mandatory, but is the alsa default so I kept it. >> >> >> -- >> Anssi Hannula >> ___ >> pulseaudio-discuss mailing list >> pulseaudio-discuss@mail.0pointer.de >> https://tango.0pointer.de/mailman/listinfo/pulseaudio-discuss >> > > Would anyone know where I could get a hold of some DTS-HD samples in > 192Khz and 384kHz for testing? Compile ffmpeg and use it for the samples at http://samples.mplayerhq.hu/A-codecs/DTS/dts/ -- Anssi Hannula ___ pulseaudio-discuss mailing list pulseaudio-discuss@mail.0pointer.de https://tango.0pointer.de/mailman/listinfo/pulseaudio-discuss
Re: [pulseaudio-discuss] [WIP] Passthrough support
On 24.03.2011 16:18, pl bossart wrote: >> It seems that 384k sample rates aren't supported directly in alsa, I did >> some patching to no avail yet. >> >> In any case if the channel count can be specified with passthrough the >> following should work. >> >> paplay --raw --channels=2 --rate=192000 --passthrough File.dts.spdif192khz ( >> this works). >> >> paplay --raw --channels=4 --rate=192000 --passthrough File.dts.spdif384khz ( >> this fails). >> >> To passthrough dolby true-hd it looks like it'll be necessary for more than >> two channels to work. > > There was a thread on dts-hd in alsa-devel at some point. Anssi > (cc:ed) contributed some patches for HDMI and provided the information > below on ffmpeg configurations. > You may want to try at the alsa level before trying with pulseaudio to > make sure your setup is correct. I tend to believe you have to go for > 8ch @ 192kHz to make this work based on my limited understanding of > HBR. Indeed for HBR you need to always specify 8 channels and use rate to control the final rate (i.e. you either use "normal" 2 channel passthrough or HBR 8 channel passthrough). For example to passthrough the abovementioned 384 kHz stream you need to use 8 channels and rate of 96000. However, I think 384kHz DTS bitstream is generally *not* supported by A/V receivers, so you probably want to use 768kHz (8 channels, 192kHz). (note: I haven't tested whether HBR works with pulseaudio or not) > The DTS-HD part is not merged yet (patch is in ffmpeg-devel@), but the > TrueHD and E-AC-3 support is already there in ffmpeg trunk. > > The ffmpeg commandline to use is: > ffmpeg -i input.file -f spdif output.spdif > > For DTS-HD files, to get full passthrough (i.e. not only core), a > -dtshd_rate parameter is needed, which sets the output IEC958 rate. > ffmpeg -i input.file -f spdif -dtshd_rate 192000 output.spdif > ffmpeg -i input.file -f spdif -dtshd_rate 768000 output.spdif > 192000Hz is enough for streams that have a bitrate below 6.144Mbps, which > means all DTS-HD High Resolution Audio files and even many of the DTS-HD > Master Audio (the latter are lossless VBR). > > To play the spdif files back, I use > aplay -D hdmi:CARD=$CARDNAME,DEV=$DEVICENUM,AES0=0x06 -c $CHANCOUNT -r > $RATE file.spdif > > - replacing $CARDNAME with the card name > - replacing $DEVICENUM with 0..3 depending on card and hdmi port (for > non-zero DEVICENUM you'll need a patch from alsa git: > http://git.alsa-project.org/?p=alsa-lib.git;a=commitdiff;h=e6d5dcf1f625984605d362338d71162de45a6c60 > ) > - set $CHANCOUNT and $RATE as per below > - rate 192000 and channels 2 for IEC958 rate 192 kHz (for e.g. 48 kHz > E-AC-3, and DTS-HD when the IEC958 rate was set to 192000 in ffmpeg) > - rate 192000 and channels 8 for IEC958 rate 768 kHz (for most TrueHD > files, and for DTS-HD when the rate was set to 768000) > - note that having the 0x02 bit (non-pcm) set in AES0 is mandatory when > $CHANCOUNT is larger than 2, as ALSA uses it to determine whether to use > HBR or not. The additional 0x04 (non-copyright) I use above is not > mandatory, but is the alsa default so I kept it. -- Anssi Hannula ___ pulseaudio-discuss mailing list pulseaudio-discuss@mail.0pointer.de https://tango.0pointer.de/mailman/listinfo/pulseaudio-discuss
Re: [pulseaudio-discuss] HDMI sink is stereo-only
On 23.01.2011 09:19, Xavier Bestel wrote: > Hi, Hi! > sorry to poke you about that, but that problem isn't a PA one, it's > either ALSA or Radeon, but none of them even answered. So I figured you > guys have had a lot of experience dealing with ALSA drivers troubles and > could tell me where to look for solutions (or at least correct > diagnostic). > > I have a Radeon HD2600, linked though a DVI-to-HDMI cable to a Yamaha > RX-1600 amp. ALSA doesn't accept something else than stereo files, e.g: Radeon devices have nonstandard multichannel support which is not presently documented, and it is not supported by kernel/ALSA. -- Anssi Hannula ___ pulseaudio-discuss mailing list pulseaudio-discuss@mail.0pointer.de https://tango.0pointer.de/mailman/listinfo/pulseaudio-discuss
