[linux-audio-dev] diskstream and jack

[conrad berhörster]

Hello, 

ok, read the chapter semaphores! B))


Am Freitag 14 Juli 2006 12:17 schrieb Dmitry Baikov:
> The short answer:
>
> #include <jack/jack.h>
> #include <jack/ringbuffer.h>
> #include <semaphore.h>
>
> sem_t block_wait;
> jack_ringbuffer_t ringbuf;
>
> init()
> {
>     int max_blocks = buffer_size_in_samples/jack_block_size
>     sem_init(&block_wait, 0, max_blocks);
> }
fine , I understand!

>
> jack_process()
> {
>     float *out = jack_port_get_buffer(...);
>     jack_ringbuffer_read(ringbuf, out, block_size*sizeof(float));
>     sem_post(&block_wait);
> }
Just to be sure. 
This means every Port has his own Ringbuffer, right? So stereo needs two, 5.1 
needs 6 ? 
But i only need one sem_post for all, because i should avoid to have different 
readpositions in my RingBuffers. 

And if i understand Paul Davis in  the right way, i never read more data as 
jack needed, and this isn't more as 1 or 2k - normally. ??!

sizu c~