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
+ it under the terms of the GNU Lesser General Public License as published
by the Free Software Foundation; either version 2 of the License,
or (at your option) any later version.
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
+ You should have received a copy of the GNU Lesser 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.
#include "util.h"
#include "sample-util.h"
#include "alsa-util.h"
+#include "xmalloc.h"
+#include "log.h"
+#include "module-alsa-source-symdef.h"
+
+PA_MODULE_AUTHOR("Lennart Poettering")
+PA_MODULE_DESCRIPTION("ALSA Source")
+PA_MODULE_VERSION(PACKAGE_VERSION)
+PA_MODULE_USAGE("source_name=<name for the source> device=<ALSA device> format=<sample format> channels=<number of channels> rate=<sample rate> fragments=<number of fragments> fragment_size=<fragment size>")
struct userdata {
snd_pcm_t *pcm_handle;
struct pa_source *source;
- void **io_sources;
- unsigned n_io_sources;
+ 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",
+ "format",
"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");
+ pa_log(__FILE__": *** ALSA-XRUN (capture) ***\n");
if (snd_pcm_prepare(u->pcm_handle) < 0)
- fprintf(stderr, "snd_pcm_prepare() failed\n");
+ pa_log(__FILE__": 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.memblock = pa_memblock_new(u->memchunk.length = u->fragment_size, u->source->core->memblock_stat);
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 = snd_pcm_readi(u->pcm_handle, (uint8_t*) u->memchunk.memblock->data + u->memchunk.index, u->memchunk.length / u->frame_size)) < 0) {
if (frames == -EAGAIN)
return;
continue;
}
- fprintf(stderr, "snd_pcm_readi() failed: %s\n", strerror(-frames));
+ pa_log(__FILE__": snd_pcm_readi() failed: %s\n", strerror(-frames));
return;
}
}
}
-static void io_callback(struct pa_mainloop_api*a, void *id, int fd, enum pa_mainloop_api_io_events events, void *userdata) {
+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 && id);
+ 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) {
+static pa_usec_t source_get_latency_cb(struct pa_source *s) {
+ struct userdata *u = s->userdata;
+ snd_pcm_sframes_t frames;
+ assert(s && u && u->source);
+
+ if (snd_pcm_delay(u->pcm_handle, &frames) < 0) {
+ pa_log(__FILE__": failed to get delay\n");
+ s->get_latency = NULL;
+ return 0;
+ }
+
+ return pa_bytes_to_usec(frames * u->frame_size, &s->sample_spec);
+}
+
+int pa__init(struct pa_core *c, struct pa_module*m) {
struct pa_modargs *ma = NULL;
int ret = -1;
struct userdata *u = NULL;
size_t frame_size;
if (!(ma = pa_modargs_new(m->argument, valid_modargs))) {
- fprintf(stderr, __FILE__": failed to parse module arguments\n");
+ pa_log(__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");
+ pa_log(__FILE__": failed to parse sample specification\n");
goto fail;
}
- frame_size = pa_sample_size(&ss);
+ 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");
+ pa_log(__FILE__": failed to parse buffer metrics\n");
goto fail;
}
buffer_size = fragsize/frame_size*periods;
- u = malloc(sizeof(struct userdata));
- assert(u);
- memset(u, 0, sizeof(struct userdata));
+ 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);
+ pa_log(__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");
+ pa_log(__FILE__": Failed to set hardware parameters\n");
goto fail;
}
assert(u->source);
u->source->userdata = u;
+ u->source->get_latency = source_get_latency_cb;
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_sources(u->pcm_handle, c->mainloop, &u->io_sources, &u->n_io_sources, io_callback, u) < 0) {
- fprintf(stderr, __FILE__": failed to obtain file descriptors\n");
+ if (pa_create_io_events(u->pcm_handle, c->mainloop, &u->io_events, &u->n_io_events, io_callback, u) < 0) {
+ pa_log(__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);
+ pa_log(__FILE__": using %u fragments of size %u bytes.\n", periods, u->fragment_size);
u->memchunk.memblock = NULL;
u->memchunk.index = u->memchunk.length = 0;
fail:
if (u)
- pa_module_done(c, m);
+ pa__done(c, m);
goto finish;
}
-void pa_module_done(struct pa_core *c, struct pa_module*m) {
+void pa__done(struct pa_core *c, struct pa_module*m) {
struct userdata *u;
assert(c && m);
- if ((u = m->userdata)) {
- if (u->source)
- pa_source_free(u->source);
-
- if (u->io_sources)
- pa_free_io_sources(c->mainloop, u->io_sources, u->n_io_sources);
-
- 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);
-
- free(u);
+ if (!(u = m->userdata))
+ return;
+
+ if (u->source) {
+ pa_source_disconnect(u->source);
+ pa_source_unref(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);
}