Re: [pygame] Re: [BUG] mixer.init() mixer.get_init() inconsistancies 1.8.0

["Charlie Nolan" <funnyman3595@xxxxxxxxx>]

In case it's useful, here are my results, from pygame 1.8.0 on Gentoo Linux:

Tried (11025, -16, 1), got (11025, -16, 0)
Sample rate equal? True
Sample width equal? True
Sample number of output channels equal? False
Tried (11025, -16, 2), got (11025, -16, 1)
Sample rate equal? True
Sample width equal? True
Sample number of output channels equal? False
Tried (11025, -8, 1), got (11025, 8, 0)
Sample rate equal? True
Sample width equal? False
Sample number of output channels equal? False
Tried (11025, -8, 2), got (11025, 8, 1)
Sample rate equal? True
Sample width equal? False
Sample number of output channels equal? False
Tried (11025, 8, 1), got (11025, 8, 0)
Sample rate equal? True
Sample width equal? True
Sample number of output channels equal? False
Tried (11025, 8, 2), got (11025, 8, 1)
Sample rate equal? True
Sample width equal? True
Sample number of output channels equal? False
Tried (22050, -16, 1), got (22050, -16, 0)
Sample rate equal? True
Sample width equal? True
Sample number of output channels equal? False
Tried (22050, -16, 2), got (22050, -16, 1)
Sample rate equal? True
Sample width equal? True
Sample number of output channels equal? False
Tried (22050, -8, 1), got (22050, 8, 0)
Sample rate equal? True
Sample width equal? False
Sample number of output channels equal? False
Tried (22050, -8, 2), got (22050, 8, 1)
Sample rate equal? True
Sample width equal? False
Sample number of output channels equal? False
Tried (22050, 8, 1), got (22050, 8, 0)
Sample rate equal? True
Sample width equal? True
Sample number of output channels equal? False
Tried (22050, 8, 2), got (22050, 8, 1)
Sample rate equal? True
Sample width equal? True
Sample number of output channels equal? False
Tried (44100, -16, 1), got (44100, -16, 0)
Sample rate equal? True
Sample width equal? True
Sample number of output channels equal? False
Tried (44100, -16, 2), got (44100, -16, 1)
Sample rate equal? True
Sample width equal? True
Sample number of output channels equal? False
Tried (44100, -8, 1), got (44100, 8, 0)
Sample rate equal? True
Sample width equal? False
Sample number of output channels equal? False
Tried (44100, -8, 2), got (44100, 8, 1)
Sample rate equal? True
Sample width equal? False
Sample number of output channels equal? False
Tried (44100, 8, 1), got (44100, 8, 0)
Sample rate equal? True
Sample width equal? True
Sample number of output channels equal? False
Tried (44100, 8, 2), got (44100, 8, 1)
Sample rate equal? True
Sample width equal? True
Sample number of output channels equal? False
Tried (48000, -16, 1), got (48000, -16, 0)
Sample rate equal? True
Sample width equal? True
Sample number of output channels equal? False
Tried (48000, -16, 2), got (48000, -16, 1)
Sample rate equal? True
Sample width equal? True
Sample number of output channels equal? False
Tried (48000, -8, 1), got (48000, 8, 0)
Sample rate equal? True
Sample width equal? False
Sample number of output channels equal? False
Tried (48000, -8, 2), got (48000, 8, 1)
Sample rate equal? True
Sample width equal? False
Sample number of output channels equal? False
Tried (48000, 8, 1), got (48000, 8, 0)
Sample rate equal? True
Sample width equal? True
Sample number of output channels equal? False
Tried (48000, 8, 2), got (48000, 8, 1)
Sample rate equal? True
Sample width equal? True
Sample number of output channels equal? False

On 6/7/08, Frankie <Frankie.Robertson@xxxxxxxxxxxxxx> wrote:
> On Jun 7, 3:59 pm, Frankie <Frankie.Robert...@xxxxxxxxxxxxxx> wrote:
> *snip*
>
> Here's a related possible bug that makes me suspect that those
> inconsistancies may be something to do with my setup. (I get these
> problems on the release and the svn HEAD running on Ubuntu 8.04. The
> versions of the requirements are all the ones from the repositories.)
>
> #The problem is that:
> import pygame
> import numpy
> import math
> #when the mixer is initialised with 1 output channel
> pygame.mixer.init(44100, -8, 1)
> #and numpy is used instead of numpy for sndarray
> pygame.sndarray.use_arraytype('numpy')
> #and then make_sound is run on a one-dimension array (in this case a
> sine wave at the pitch of the note A4)
> pygame.sndarray.make_sound(numpy.sin(numpy.array(xrange(10000)) * 440
> * 2 * math.pi / 44100)
> #I get this error
> <type 'exceptions.ValueError'>: Array must be 2-dimensional for stereo
> mixer
>
> For me it works just changing "if channels == 1:" to "if channels ==
> 0:" on line 122 of _numpysndarray.py. But this fix conflicts with
> fixing the bug this is a reply to.
>
> Numeric arrays work fine for me by the way. Which is weird, because I
> looked at the c for that and it seemed more or less a 1:1 translation
> (for that section).
>
> Oh, and whilst I was in _numpysndarray.py I saw array(...) and
> samples(...) (whose implementation should probably be merged, even if
> they're left seperate in the api considering the only difference is
> the ".raw" in the line "data = sound.get_buffer().raw" unilke the
> Numeric implementation) use the line "channels =
> mixer.get_num_channels()" to get the number of mixing channels, but
> then treat that as if it's the number of *OUTPUT* channels.
>
> Sure enough in certain situations this causes the line "array.shape =
> shape" to raise the error "ValueError: total size of new array must be
> unchanged". So it's clear that pygame.mixer.get_init() should be used
> instead just as Mix_QuerySpec (which does appear to return a 1-based
> number of output channels rather than the 0-based one my
> pygame.mixer.get_init() does) is used in the Numeric implementation.
>