16 Mar
2012
16 Mar
'12
11:38 p.m.
Hello. I'm using portaudio19 to write an app that connects to jack (and
alsa) and I can't find anywhere in the portaudio api a way to ask jack
for the current samplerate and buffersize.
¿Am I missing something obvious?
¿Do I have to use the jack api to get these params and then be able to
use the portaudio api for starting a stream, implementing the audio
callback, etc?
17 Mar
17 Mar
12:55 a.m.
If your using *just* the PortAudio API, you can't call any of the JACK API
calls.
PortAudio will provide your program with what "PaStreamParameters" you give
it. This means that PortAudio will do resampling of audio to the samplerate
that your program opened the stream with... kind of a different concept to
JACK.
In short with PortAudio, you tell it what sampRate & bufSize you want, it
takes care of providing that to you.
JACK tells you to run @ sampRate = x & bufSize = y, and that's that.
I'll advise if your working on a pro audio application to program to JACK,
and not PortAudio. Reasons: it provides MIDI sample accurate with audio,
gives much more "pro" api, no sample rate conversions, no bloat, just pure
JACK :)
-Harry
On Fri, Mar 16, 2012 at 10:38 PM, Rafael Vega <email.rafa(a)gmail.com> wrote:
Hello. I'm using portaudio19 to write an app that
connects to jack (and
alsa) and I can't find anywhere in the portaudio api a way to ask jack for
the current samplerate and buffersize.
¿Am I missing something obvious?
¿Do I have to use the jack api to get these params and then be able to use
the portaudio api for starting a stream, implementing the audio callback,
etc?
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Linux-audio-dev@lists.**linuxaudio.org<Linux-audio-dev@lists.linuxaudio.org>
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12:55 a.m.
On Fri, Mar 16, 2012 at 05:38:10PM -0500, Rafael Vega wrote:
Hello. I'm using portaudio19 to write an app that
connects to jack (and
alsa) and I can't find anywhere in the portaudio api a way to ask jack
for the current samplerate and buffersize.
¿Am I missing something obvious?
¿Do I have to use the jack api to get these params and then be able to
use the portaudio api for starting a stream, implementing the audio
callback, etc?
Portaudio's Jack support is completely borked. If you do not
intend to use its cross-platform features, please spare us
the misery of yet another Linux app using it.
Just use Jack's native API. When you've got that working, and
you want ALSA as well, use the zita-alsa-pcmi library. This
will allow you to share 99% of your code for ALSA and Jack.
Ciao,
--
FA
Vor uns liegt ein weites Tal, die Sonne scheint - ein Glitzerstrahl.
1:47 a.m.
I want to learn an api that is as cross-platform as possible, ideally
that includes iOS and Android.That's why I started looking at Portaudio.
I started with JACK because i can use other jack apps to help debug my
code.
Do you guys have a better alternative for cross-platform devel?
Perhaps RTAudio?
Thanks for the advise!
OiOn Fri 16 Mar 2012 06:55:37 PM COT, Fons Adriaensen wrote:
On Fri, Mar 16, 2012 at 05:38:10PM -0500, Rafael Vega
wrote:
Hello. I'm using portaudio19 to write an app
that connects to jack (and
alsa) and I can't find anywhere in the portaudio api a way to ask jack
for the current samplerate and buffersize.
¿Am I missing something obvious?
¿Do I have to use the jack api to get these params and then be able to
use the portaudio api for starting a stream, implementing the audio
callback, etc?
Portaudio's Jack support is completely borked. If you do not
intend to use its cross-platform features, please spare us
the misery of yet another Linux app using it.
Just use Jack's native API. When you've got that working, and
you want ALSA as well, use the zita-alsa-pcmi library. This
will allow you to share 99% of your code for ALSA and Jack.
Ciao,
2:12 a.m.
Let me rephrase that:
Is RTAudio any better than PortAudio for implementing JACK clients?
Salud!
On Fri 16 Mar 2012 07:47:26 PM COT, Rafael Vega wrote:
I want to learn an api that is as cross-platform as
possible, ideally
that includes iOS and Android.That's why I started looking at Portaudio.
I started with JACK because i can use other jack apps to help debug my
code.
Do you guys have a better alternative for cross-platform devel?
Perhaps RTAudio?
Thanks for the advise!
OiOn Fri 16 Mar 2012 06:55:37 PM COT, Fons Adriaensen wrote:
On Fri, Mar 16, 2012 at 05:38:10PM -0500, Rafael
Vega wrote:
Hello. I'm using portaudio19 to write an app
that connects to jack (and
alsa) and I can't find anywhere in the portaudio api a way to ask jack
for the current samplerate and buffersize.
¿Am I missing something obvious?
¿Do I have to use the jack api to get these params and then be able to
use the portaudio api for starting a stream, implementing the audio
callback, etc?
Portaudio's Jack support is completely borked. If you do not
intend to use its cross-platform features, please spare us
the misery of yet another Linux app using it.
Just use Jack's native API. When you've got that working, and
you want ALSA as well, use the zita-alsa-pcmi library. This
will allow you to share 99% of your code for ALSA and Jack.
Ciao,
2:26 a.m.
On , Rafael Vega <email.rafa(a)gmail.com> wrote:
Is RTAudio any better than PortAudio for implementing
JACK clients?
Yes! Lots!
Downsides are no MIDI (without RtMIDI), and no JACK transport / session
management.
If your working for Linux, mobile platforms, windows & osx then IMO RtAudio
is your best choice.
-Harry
11:13 a.m.
I think it depends on whether you are happier with C or C++. I like portaudio and have
used it quite a bit as a simple way to add realtime audio to C programs.
Victor
On 17 Mar 2012, at 01:12, Rafael Vega <email.rafa(a)gmail.com> wrote:
Let me rephrase that:
Is RTAudio any better than PortAudio for implementing JACK clients?
Salud!
On Fri 16 Mar 2012 07:47:26 PM COT, Rafael Vega wrote:
I want to learn an api that is as cross-platform
as possible, ideally
that includes iOS and Android.That's why I started looking at Portaudio.
I started with JACK because i can use other jack apps to help debug my
code.
Do you guys have a better alternative for cross-platform devel?
Perhaps RTAudio?
Thanks for the advise!
OiOn Fri 16 Mar 2012 06:55:37 PM COT, Fons Adriaensen wrote:
_______________________________________________
Linux-audio-dev mailing list
Linux-audio-dev(a)lists.linuxaudio.org
http://lists.linuxaudio.org/listinfo/linux-audio-dev On Fri, Mar 16, 2012 at 05:38:10PM -0500, Rafael
Vega wrote:
Hello. I'm using portaudio19 to write an app
that connects to jack (and
alsa) and I can't find anywhere in the portaudio api a way to ask jack
for the current samplerate and buffersize.
¿Am I missing something obvious?
¿Do I have to use the jack api to get these params and then be able to
use the portaudio api for starting a stream, implementing the audio
callback, etc?
Portaudio's Jack support is completely borked. If you do not
intend to use its cross-platform features, please spare us
the misery of yet another Linux app using it.
Just use Jack's native API. When you've got that working, and
you want ALSA as well, use the zita-alsa-pcmi library. This
will allow you to share 99% of your code for ALSA and Jack.
Ciao,
4629
days inactive
4630
days old
linux-audio-dev@lists.linuxaudio.org
6 comments
5 participants
participants (5)
-
Fons Adriaensen -
Harry van Haaren -
harryhaaren＠gmail.com
-
Rafael Vega -
Victor