8 Apr
2013
8 Apr
'13
1:45 p.m.
Hi,
I'm trying to use jack's ringbuffer like this:
- initialization:
jack_ringbuffer_t * ringBuf = jack_ringbuffer_create(sizeof(jack_default_audio_sample_t) *
(1<<16));
memset (ringBuf->buf, 0, ringBuf->size) ;
- jack process callback:
jack_default_audio_sample_t buf[numChannels];
size_t read_cnt = 0;
for (_frameCounter=0; _frameCounter < nFrames; _frameCounter++) {
read_cnt = jack_ringbuffer_read(ringBuf, (void*)buf, sample_size * numChannels);
^^^^^^^^^ error
}
but g++ won't compile the code and report this
error: invalid conversion from 'void*' to 'char*' [-fpermissive]
/usr/local/include/jack/ringbuffer.h:136: error: initializing argument 2 of 'size_t
jack_ringbuffer_read(jack_ringbuffer_t*, char*, size_t)' [-fpermissive]
passing -fpermissive gets the program running but is it the right way to do it?
Thanks
--
Raphaël.
8 Apr
8 Apr
1:51 p.m.
On Mon, Apr 8, 2013 at 12:45 PM, Raphaël BOLLEN <raphael.bollen(a)mobistar.be>
wrote:
error: invalid conversion from 'void*' to
'char*' [-fpermissive]
jack_ringbuffer_read() expects the buffer pointer to be of type char* not
void*.
The "char*" should just be interpreted as "pointer", as the data is
data,
which is not necessarily a char.
Change your case from (void*) to (char*) and you won't need -fpermissive :)
HTH, -H
2:02 p.m.
On 04/08/2013 01:51 PM, Harry van Haaren wrote:
On Mon, Apr 8, 2013 at 12:45 PM, Raphaël BOLLEN
<raphael.bollen(a)mobistar.be
<mailto:raphael.bollen@mobistar.be>> wrote:
Hi Harry, thanks for the information.
--
Raphaël.
error: invalid conversion from 'void*' to
'char*' [-fpermissive]
jack_ringbuffer_read() expects the buffer pointer to be of type char* not void*.
The "char*" should just be interpreted as "pointer", as the data is
data, which is not necessarily a
char.
Change your case from (void*) to (char*) and you won't need -fpermissive :)
HTH, -H
2:09 p.m.
On Mon, Apr 8, 2013 at 1:01 PM, Raphaël BOLLEN
<raphael.bollen(a)mobistar.be>wrote;wrote:
Hi Harry, thanks for the information.
Your welcome!
I'm intrested in what kind of JACK program you're working on..?
Also I'm collecting example / tutorial code for JACK programming, perhaps
its of intrest to you:
https://github.com/harryhaaren/openAudioProgrammingTutorials
Cheers, -Harry
2:23 p.m.
On 04/08/2013 02:09 PM, Harry van Haaren wrote:
On Mon, Apr 8, 2013 at 1:01 PM, Raphaël BOLLEN
<raphael.bollen(a)mobistar.be
<mailto:raphael.bollen@mobistar.be>> wrote:
Hi Harry, thanks for the information.
Your welcome!
I'm intrested in what kind of JACK program you're working on..?
It's yet another audio file player. My main interest (apart from playing audio :-) )
is that it
makes permanent connections to jack instead of connecting / disconnecting when changing
audio files.
Also I'm collecting example / tutorial code for JACK programming, perhaps its of
intrest to you:
https://github.com/harryhaaren/openAudioProgrammingTutorials
That's good information, thanks.
Cheers, -Harry
Best regards
--
Raphaël.
2:24 p.m.
On Mon, Apr 08, 2013 at 02:23:07PM +0200, Raphaël BOLLEN wrote:
It's yet another audio file player. My main
interest (apart from
playing audio :-) ) is that it makes permanent connections to jack
instead of connecting / disconnecting when changing audio files.
My 4deckradio does exactly this, though I'm not sure it fits the bill,
since it's targeting radio DJs.
Cheers
--
mail: adi(a)thur.de http://adi.thur.de PGP/GPG: key via keyserver
3:16 p.m.
On 04/08/2013 02:24 PM, Adrian Knoth wrote:
On Mon, Apr 08, 2013 at 02:23:07PM +0200, Raphaël
BOLLEN wrote:
Not really my use case but thanks for the link, I have it running here. How do you control
the
decks? mouse, key shortcuts, other?
It's yet another audio file player. My main
interest (apart from
playing audio :-) ) is that it makes permanent connections to jack
instead of connecting / disconnecting when changing audio files.
My 4deckradio does exactly this, though I'm not sure it fits the bill,
since it's targeting radio DJs.
Cheers
Cheers
3:49 p.m.
On Mon, Apr 08, 2013 at 03:16:13PM +0200, Raphaël BOLLEN wrote:
Not really my use case but thanks for the link, I have it running
here. How do you control the decks? mouse, key shortcuts, other?
You select a file and press play. You could also press F9 .. F12 to
start/stop the decks. Or you own a studio surface which sends joystick
button press/release events.
If you have a USB joystick, simply connect it. Press Button 1, and it
plays deck 1, release button 1, and it stops. Of course, you can also
press Buttons 1-4 simultaneously to have all four decks playing at the
same time. ;)
Selecting a new file while one is playing queues the new file. Press
stop or wait for the current one to finish to actually play it. (it's a
safety for radio stations, so they're not accidentally stopping the
current playback).
Same for stop: program only quits if you stop all four decks and then
press Ctrl+q. Well, the window-close button is a shortcut, but it
wouldn't be visible in fullscreen mode.
HTH
--
mail: adi(a)thur.de http://adi.thur.de PGP/GPG: key via keyserver
It's yet another audio file player. My main
interest (apart from
playing audio :-) ) is that it makes permanent connections to jack
instead of connecting / disconnecting when changing audio files.
My 4deckradio does exactly this, though I'm not sure it fits the bill,
since it's targeting radio DJs.
5:31 p.m.
On 04/08/2013 03:49 PM, Adrian Knoth wrote:
On Mon, Apr 08, 2013 at 03:16:13PM +0200, Raphaël
BOLLEN wrote:
Not really my use case but thanks for the link, I have it running
here. How do you control the decks? mouse, key shortcuts, other?
You select a file and press play. You could also press F9 .. F12 to
start/stop the decks. Or you own a studio surface which sends joystick
button press/release events.
If you have a USB joystick, simply connect it. Press Button 1, and it
plays deck 1, release button 1, and it stops. Of course, you can also
press Buttons 1-4 simultaneously to have all four decks playing at the
same time. ;)
Selecting a new file while one is playing queues the new file. Press
stop or wait for the current one to finish to actually play it. (it's a
safety for radio stations, so they're not accidentally stopping the
current playback).
Same for stop: program only quits if you stop all four decks and then
press Ctrl+q. Well, the window-close button is a shortcut, but it
wouldn't be visible in fullscreen mode.
HTH
Thanks Adrian, may I suggest you copy paste this to your Readme.md file...
It's yet another audio file player. My main
interest (apart from
playing audio :-) ) is that it makes permanent connections to jack
instead of connecting / disconnecting when changing audio files.
My 4deckradio does exactly this, though I'm not sure it fits the bill,
since it's targeting radio DJs.
5:48 p.m.
On Mon, Apr 08, 2013 at 05:31:53PM +0200, Raphaël BOLLEN wrote:
[4deckradio usage information]
Thanks Adrian, may I suggest you copy paste this to
your Readme.md file...
Absolutely. Done and pushed.
Thanks
--
mail: adi(a)thur.de http://adi.thur.de PGP/GPG: key via keyserver
3:29 p.m.
On Mon, Apr 8, 2013 at 8:23 AM, Raphaël BOLLEN
<raphael.bollen(a)mobistar.be>wrote;wrote:
On 04/08/2013 02:09 PM, Harry van Haaren wrote:
all the xmms-based players do this (xmms, beep, beep2, audacious)
gstreamer based players also do this across files, but not above play/stop.
On Mon, Apr 8, 2013 at 1:01 PM, Raphaël BOLLEN
<
raphael.bollen(a)mobistar.be
<mailto:raphael.bollen@**mobistar.be <raphael.bollen(a)mobistar.be>>>
wrote:
Hi Harry, thanks for the information.
Your welcome!
I'm intrested in what kind of JACK program you're working on..?
It's yet another audio file player. My main interest (apart from playing
audio :-) ) is that it makes permanent connections to jack instead of
connecting / disconnecting when changing audio files.
5:27 p.m.
On 04/08/2013 03:29 PM, Paul Davis wrote:
On Mon, Apr 8, 2013 at 8:23 AM, Raphaël BOLLEN <raphael.bollen(a)mobistar.be
<mailto:raphael.bollen@mobistar.be>> wrote:
On 04/08/2013 02:09 PM, Harry van Haaren wrote:
On Mon, Apr 8, 2013 at 1:01 PM, Raphaël BOLLEN <raphael.bollen(a)mobistar.be
<mailto:raphael.bollen@mobistar.be>
<mailto:raphael.bollen@__mobistar.be
<mailto:raphael.bollen@mobistar.be>>> wrote:
Hi Harry, thanks for the information.
Your welcome!
I'm intrested in what kind of JACK program you're working on..?
It's yet another audio file player. My main interest (apart from playing audio
:-) ) is that it
makes permanent connections to jack instead of connecting / disconnecting when
changing audio files.
all the xmms-based players do this (xmms, beep, beep2, audacious)
gstreamer based players also do this across files, but not above play/stop.
Thanks Paul, these are really fine programs but mostly for playing stereo music. I need to
play
mono, stereo and 4 or more channels files on a headless system so it's a bit of a
corner case
application...
Cheers
--
Raphaël.
11 Apr
11 Apr
11:35 p.m.
On 04/08/2013 05:27 PM, Raphaël BOLLEN wrote:
On 04/08/2013 03:29 PM, Paul Davis wrote:
please count me in as an alpha tester for the "or more" scenario :)
--
Jörn Nettingsmeier
Lortzingstr. 11, 45128 Essen, Tel. +49 177 7937487
Meister für Veranstaltungstechnik (Bühne/Studio)
Tonmeister (VDT)
http://stackingdwarves.net
all the xmms-based players do this (xmms, beep, beep2, audacious)
gstreamer based players also do this across files, but not above
play/stop.
Thanks Paul, these are really fine programs but mostly for playing
stereo music. I need to play mono, stereo and 4 or more channels files
on a headless system so it's a bit of a corner case application...
12 Apr
12 Apr
10:17 a.m.
On 04/11/2013 11:35 PM, Jörn Nettingsmeier wrote:
On 04/08/2013 05:27 PM, Raphaël BOLLEN wrote:
I would certainly appreciate your feedback on this but you have to know that:
1. the player is a shared library loaded at runtime;
2. you will need QT;
3. I only have a minimalistic gui to load and test the player;
The player works for what I need it to but I plan to implement some 'features' to
allow routing of
the sound file channels to the player outputs, it is currently ch i to output i. If you
already have
ideas about what would be needed, I'm all ears.
Drop me a mail if you still want to alpha test...
Cheers
--
Raphaël.
On 04/08/2013 03:29 PM, Paul Davis wrote:
please count me in as an alpha tester for the "or more" scenario :)
all the xmms-based players do this (xmms, beep, beep2, audacious)
gstreamer based players also do this across files, but not above
play/stop.
Thanks Paul, these are really fine programs but mostly for playing
stereo music. I need to play mono, stereo and 4 or more channels files
on a headless system so it's a bit of a corner case application...
11 Apr
11 Apr
8:23 p.m.
On 04/08/2013 01:51 PM, Harry van Haaren wrote:
On Mon, Apr 8, 2013 at 12:45 PM, Raphaël BOLLEN
<raphael.bollen(a)mobistar.be <mailto:raphael.bollen@mobistar.be>> wrote:
hmmm. isn't that a really outdated way of saying "generic pointer", like
C89 or so? maybe the ringbuffer implementation should be changed to
(void *)?
or am i misunderstanding something?
--
Jörn Nettingsmeier
Lortzingstr. 11, 45128 Essen, Tel. +49 177 7937487
Meister für Veranstaltungstechnik (Bühne/Studio)
Tonmeister VDT
http://stackingdwarves.net
error: invalid conversion from 'void*' to
'char*' [-fpermissive]
jack_ringbuffer_read() expects the buffer pointer to be of type char*
not void*.
The "char*" should just be interpreted as "pointer", as the data is
data, which is not necessarily a char.
Change your case from (void*) to (char*) and you won't need -fpermissive :)
HTH, -H
4166
days inactive
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days old
linux-audio-dev@lists.linuxaudio.org
14 comments
5 participants
participants (5)
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Adrian Knoth -
Harry van Haaren -
Jörn Nettingsmeier -
Paul Davis -
Raphaël BOLLEN