Hello,
I would like to use pulseaudio on a PCM device (no ALSA, no OSS). For this, I
made some modifications to module-pipe-sink so that it writes to the PCM
device instead of the FIFO. (below is a minimal patch that shows how I did it
(I am working on the 0.9.10 version)):
The problem is in the thread_func main loop (line 137):
if (u->sink->thread_info.state == PA_SINK_RUNNING && pollfd->revents) {
pollfd->revents is never set, so nothing is ever written to the device. I will
get sound if I void the check:
if (u->sink->thread_info.state == PA_SINK_RUNNING) {
But then of course I get a very high CPU usage.
I get a similar behaviour if I use module-oss.c as a basis for the
implementation.
I added some debug info to rtpoll.c and it seems that inside pa_rtpoll_run
events are always set to POLLIN, even though it is explitly set to POLLOUT
(module-pipe-sink.c:176).
Anyhow, I am not sure of what exactly the problem is and running out of ideas
on what to try.
Does anyone have an idea ?
Thanks,
Loris
-------
$ diff module-pipe-sink.c module-pcm-sink.c
65c65
< #define DEFAULT_FILE_NAME "/tmp/music.output"
---
> #define DEFAULT_FILE_NAME "/dev/aud_pcm"
235,236c235
< mkfifo(u->filename, 0666);
< if ((u->fd = open(u->filename, O_RDWR|O_NOCTTY)) < 0) {
---
> if ((u->fd = open(u->filename, O_WRONLY|O_NOCTTY)) < 0) {
249,253d247
< if (!S_ISFIFO(st.st_mode)) {
< pa_log("'%s' is not a FIFO.", u->filename);
< goto fail;
< }
<
324,328d317
< if (u->filename) {
< unlink(u->filename);
< pa_xfree(u->filename);
< }
<
