mirror of
https://gitlab.freedesktop.org/pulseaudio/pulseaudio.git
synced 2025-11-03 09:01:50 -05:00
964bdfd1e8
clean up mainloop API git-svn-id: file:///home/lennart/svn/public/pulseaudio/trunk@105 fefdeb5f-60dc-0310-8127-8f9354f1896f
246 lines
6.6 KiB
C
246 lines
6.6 KiB
C
/* $Id$ */
|
|
|
|
/***
|
|
This file is part of polypaudio.
|
|
|
|
polypaudio is free software; you can redistribute it and/or modify
|
|
it under the terms of the GNU General Public License as published
|
|
by the Free Software Foundation; either version 2 of the License,
|
|
or (at your option) any later version.
|
|
|
|
polypaudio is distributed in the hope that it will be useful, but
|
|
WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
|
|
General Public License for more details.
|
|
|
|
You should have received a copy of the GNU General Public License
|
|
along with polypaudio; if not, write to the Free Software
|
|
Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
|
|
USA.
|
|
***/
|
|
|
|
#ifdef HAVE_CONFIG_H
|
|
#include <config.h>
|
|
#endif
|
|
|
|
#include <assert.h>
|
|
#include <stdio.h>
|
|
#include <sys/poll.h>
|
|
|
|
#include <asoundlib.h>
|
|
|
|
#include "module.h"
|
|
#include "core.h"
|
|
#include "memchunk.h"
|
|
#include "sink.h"
|
|
#include "modargs.h"
|
|
#include "util.h"
|
|
#include "sample-util.h"
|
|
#include "alsa-util.h"
|
|
#include "xmalloc.h"
|
|
|
|
struct userdata {
|
|
snd_pcm_t *pcm_handle;
|
|
struct pa_source *source;
|
|
struct pa_io_event **io_events;
|
|
unsigned n_io_events;
|
|
|
|
size_t frame_size, fragment_size;
|
|
struct pa_memchunk memchunk;
|
|
struct pa_module *module;
|
|
};
|
|
|
|
static const char* const valid_modargs[] = {
|
|
"device",
|
|
"source_name",
|
|
"format",
|
|
"channels",
|
|
"rate",
|
|
"fragments",
|
|
"fragment_size",
|
|
NULL
|
|
};
|
|
|
|
#define DEFAULT_SOURCE_NAME "alsa_input"
|
|
#define DEFAULT_DEVICE "hw:0,0"
|
|
|
|
static void update_usage(struct userdata *u) {
|
|
pa_module_set_used(u->module,
|
|
(u->source ? pa_idxset_ncontents(u->source->outputs) : 0));
|
|
}
|
|
|
|
static void xrun_recovery(struct userdata *u) {
|
|
assert(u);
|
|
|
|
fprintf(stderr, "*** ALSA-XRUN (capture) ***\n");
|
|
|
|
if (snd_pcm_prepare(u->pcm_handle) < 0)
|
|
fprintf(stderr, "snd_pcm_prepare() failed\n");
|
|
}
|
|
|
|
static void do_read(struct userdata *u) {
|
|
assert(u);
|
|
|
|
update_usage(u);
|
|
|
|
for (;;) {
|
|
struct pa_memchunk post_memchunk;
|
|
snd_pcm_sframes_t frames;
|
|
size_t l;
|
|
|
|
if (!u->memchunk.memblock) {
|
|
u->memchunk.memblock = pa_memblock_new(u->memchunk.length = u->fragment_size);
|
|
u->memchunk.index = 0;
|
|
}
|
|
|
|
assert(u->memchunk.memblock && u->memchunk.memblock->data && u->memchunk.length && u->memchunk.memblock->length && (u->memchunk.length % u->frame_size) == 0);
|
|
|
|
if ((frames = snd_pcm_readi(u->pcm_handle, u->memchunk.memblock->data + u->memchunk.index, u->memchunk.length / u->frame_size)) < 0) {
|
|
if (frames == -EAGAIN)
|
|
return;
|
|
|
|
if (frames == -EPIPE) {
|
|
xrun_recovery(u);
|
|
continue;
|
|
}
|
|
|
|
fprintf(stderr, "snd_pcm_readi() failed: %s\n", strerror(-frames));
|
|
return;
|
|
}
|
|
|
|
l = frames * u->frame_size;
|
|
|
|
post_memchunk = u->memchunk;
|
|
post_memchunk.length = l;
|
|
|
|
pa_source_post(u->source, &post_memchunk);
|
|
|
|
u->memchunk.index += l;
|
|
u->memchunk.length -= l;
|
|
|
|
if (u->memchunk.length == 0) {
|
|
pa_memblock_unref(u->memchunk.memblock);
|
|
u->memchunk.memblock = NULL;
|
|
u->memchunk.index = u->memchunk.length = 0;
|
|
}
|
|
|
|
break;
|
|
}
|
|
}
|
|
|
|
static void io_callback(struct pa_mainloop_api*a, struct pa_io_event *e, int fd, enum pa_io_event_flags f, void *userdata) {
|
|
struct userdata *u = userdata;
|
|
assert(u && a && e);
|
|
|
|
if (snd_pcm_state(u->pcm_handle) == SND_PCM_STATE_XRUN)
|
|
xrun_recovery(u);
|
|
|
|
do_read(u);
|
|
}
|
|
|
|
int pa_module_init(struct pa_core *c, struct pa_module*m) {
|
|
struct pa_modargs *ma = NULL;
|
|
int ret = -1;
|
|
struct userdata *u = NULL;
|
|
const char *dev;
|
|
struct pa_sample_spec ss;
|
|
unsigned periods, fragsize;
|
|
snd_pcm_uframes_t buffer_size;
|
|
size_t frame_size;
|
|
|
|
if (!(ma = pa_modargs_new(m->argument, valid_modargs))) {
|
|
fprintf(stderr, __FILE__": failed to parse module arguments\n");
|
|
goto fail;
|
|
}
|
|
|
|
ss = c->default_sample_spec;
|
|
if (pa_modargs_get_sample_spec(ma, &ss) < 0) {
|
|
fprintf(stderr, __FILE__": failed to parse sample specification\n");
|
|
goto fail;
|
|
}
|
|
frame_size = pa_frame_size(&ss);
|
|
|
|
periods = 12;
|
|
fragsize = 1024;
|
|
if (pa_modargs_get_value_u32(ma, "fragments", &periods) < 0 || pa_modargs_get_value_u32(ma, "fragment_size", &fragsize) < 0) {
|
|
fprintf(stderr, __FILE__": failed to parse buffer metrics\n");
|
|
goto fail;
|
|
}
|
|
buffer_size = fragsize/frame_size*periods;
|
|
|
|
u = pa_xmalloc0(sizeof(struct userdata));
|
|
m->userdata = u;
|
|
u->module = m;
|
|
|
|
if (snd_pcm_open(&u->pcm_handle, dev = pa_modargs_get_value(ma, "device", DEFAULT_DEVICE), SND_PCM_STREAM_CAPTURE, SND_PCM_NONBLOCK) < 0) {
|
|
fprintf(stderr, __FILE__": Error opening PCM device %s\n", dev);
|
|
goto fail;
|
|
}
|
|
|
|
if (pa_alsa_set_hw_params(u->pcm_handle, &ss, &periods, &buffer_size) < 0) {
|
|
fprintf(stderr, __FILE__": Failed to set hardware parameters\n");
|
|
goto fail;
|
|
}
|
|
|
|
u->source = pa_source_new(c, pa_modargs_get_value(ma, "source_name", DEFAULT_SOURCE_NAME), 0, &ss);
|
|
assert(u->source);
|
|
|
|
u->source->userdata = u;
|
|
pa_source_set_owner(u->source, m);
|
|
u->source->description = pa_sprintf_malloc("Advanced Linux Sound Architecture PCM on '%s'", dev);
|
|
|
|
if (pa_create_io_events(u->pcm_handle, c->mainloop, &u->io_events, &u->n_io_events, io_callback, u) < 0) {
|
|
fprintf(stderr, __FILE__": failed to obtain file descriptors\n");
|
|
goto fail;
|
|
}
|
|
|
|
u->frame_size = frame_size;
|
|
u->fragment_size = buffer_size*u->frame_size/periods;
|
|
|
|
fprintf(stderr, __FILE__": using %u fragments of size %u bytes.\n", periods, u->fragment_size);
|
|
|
|
u->memchunk.memblock = NULL;
|
|
u->memchunk.index = u->memchunk.length = 0;
|
|
|
|
snd_pcm_start(u->pcm_handle);
|
|
|
|
ret = 0;
|
|
|
|
finish:
|
|
if (ma)
|
|
pa_modargs_free(ma);
|
|
|
|
return ret;
|
|
|
|
fail:
|
|
|
|
if (u)
|
|
pa_module_done(c, m);
|
|
|
|
goto finish;
|
|
}
|
|
|
|
void pa_module_done(struct pa_core *c, struct pa_module*m) {
|
|
struct userdata *u;
|
|
assert(c && m);
|
|
|
|
if (!(u = m->userdata))
|
|
return;
|
|
|
|
if (u->source)
|
|
pa_source_free(u->source);
|
|
|
|
if (u->io_events)
|
|
pa_free_io_events(c->mainloop, u->io_events, u->n_io_events);
|
|
|
|
if (u->pcm_handle) {
|
|
snd_pcm_drop(u->pcm_handle);
|
|
snd_pcm_close(u->pcm_handle);
|
|
}
|
|
|
|
if (u->memchunk.memblock)
|
|
pa_memblock_unref(u->memchunk.memblock);
|
|
|
|
pa_xfree(u);
|
|
}
|
|
|