+++ /dev/null
-/* $Id$ */
-
-/***
- This file is part of polypaudio.
-
- polypaudio is free software; you can redistribute it and/or modify
- it under the terms of the GNU Lesser 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 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.
-***/
-
-#ifdef HAVE_CONFIG_H
-#include <config.h>
-#endif
-
-#include <assert.h>
-#include <stdio.h>
-
-#ifdef HAVE_SYS_POLL_H
-#include <sys/poll.h>
-#else
-#include "poll.h"
-#endif
-
-#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"
-#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;
- pa_source *source;
- pa_io_event **io_events;
- unsigned n_io_events;
-
- size_t frame_size, fragment_size;
- pa_memchunk memchunk;
- pa_module *module;
-};
-
-static const char* const valid_modargs[] = {
- "device",
- "source_name",
- "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_size(u->source->outputs) : 0));
-}
-
-static void xrun_recovery(struct userdata *u) {
- assert(u);
-
- pa_log(__FILE__": *** ALSA-XRUN (capture) ***\n");
-
- if (snd_pcm_prepare(u->pcm_handle) < 0)
- pa_log(__FILE__": snd_pcm_prepare() failed\n");
-}
-
-static void do_read(struct userdata *u) {
- assert(u);
-
- update_usage(u);
-
- for (;;) {
- 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->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, (uint8_t*) 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;
- }
-
- pa_log(__FILE__": 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(pa_mainloop_api*a, pa_io_event *e, PA_GCC_UNUSED int fd, PA_GCC_UNUSED pa_io_event_flags_t 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);
-}
-
-static pa_usec_t source_get_latency_cb(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(pa_core *c, pa_module*m) {
- pa_modargs *ma = NULL;
- int ret = -1;
- struct userdata *u = NULL;
- const char *dev;
- pa_sample_spec ss;
- unsigned periods, fragsize;
- snd_pcm_uframes_t period_size;
- size_t frame_size;
- int err;
-
- if (!(ma = pa_modargs_new(m->argument, valid_modargs))) {
- 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) {
- pa_log(__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) {
- pa_log(__FILE__": failed to parse buffer metrics\n");
- goto fail;
- }
- period_size = fragsize;
-
- u = pa_xmalloc0(sizeof(struct userdata));
- m->userdata = u;
- u->module = m;
-
- snd_config_update_free_global();
- if ((err = snd_pcm_open(&u->pcm_handle, dev = pa_modargs_get_value(ma, "device", DEFAULT_DEVICE), SND_PCM_STREAM_CAPTURE, SND_PCM_NONBLOCK)) < 0) {
- pa_log(__FILE__": Error opening PCM device %s: %s\n", dev, snd_strerror(err));
- goto fail;
- }
-
- if ((err = pa_alsa_set_hw_params(u->pcm_handle, &ss, &periods, &period_size)) < 0) {
- pa_log(__FILE__": Failed to set hardware parameters: %s\n", snd_strerror(err));
- goto fail;
- }
-
- u->source = pa_source_new(c, __FILE__, pa_modargs_get_value(ma, "source_name", DEFAULT_SOURCE_NAME), 0, &ss, NULL);
- 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_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 = period_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;
-
- snd_pcm_start(u->pcm_handle);
-
- ret = 0;
-
-finish:
- if (ma)
- pa_modargs_free(ma);
-
- return ret;
-
-fail:
-
- if (u)
- pa__done(c, m);
-
- goto finish;
-}
-
-void pa__done(pa_core *c, pa_module*m) {
- struct userdata *u;
- assert(c && m);
-
- 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);
-}
-