/*
- * Copyright (C) 2005-2011 Andre Noll <maan@systemlinux.org>
+ * Copyright (C) 2005-2013 Andre Noll <maan@systemlinux.org>
*
* Licensed under the GPL v2. For licencing details see COPYING.
*/
#include <regex.h>
#include <sys/types.h>
#include <alsa/asoundlib.h>
-#include <sys/time.h>
-#include <stdbool.h>
#include "para.h"
#include "fd.h"
snd_pcm_sw_params_t *swparams;
snd_pcm_uframes_t start_threshold, stop_threshold;
snd_pcm_uframes_t buffer_size, period_size;
- snd_output_t *log;
+ snd_output_t *output_log;
unsigned buffer_time;
int ret;
const char *msg;
NULL);
if (ret < 0 || buffer_time == 0)
goto fail;
+ /* buffer at most 500 milliseconds */
+ buffer_time = PARA_MIN(buffer_time, 500U * 1000U);
msg = "could not set buffer time";
ret = snd_pcm_hw_params_set_buffer_time_near(pad->handle, hwparams,
&buffer_time, NULL);
ret = snd_pcm_nonblock(pad->handle, 1);
if (ret < 0)
goto fail;
- ret = snd_output_buffer_open(&log);
+ ret = snd_output_buffer_open(&output_log);
if (ret == 0) {
- char *buf;
+ char *buf, *p;
+ size_t sz;
PARA_INFO_LOG("dumping alsa configuration\n");
- snd_pcm_dump(pad->handle, log);
- snd_output_buffer_string(log, &buf);
- for (;;) {
- char *p = strchr(buf, '\n');
- if (!p) /* omit last output line, it's empty */
+ snd_pcm_dump(pad->handle, output_log);
+ sz = snd_output_buffer_string(output_log, &buf);
+ for (p = buf; p < buf + sz;) {
+ char *q = memchr(p, '\n', buf + sz - p);
+ if (!q)
break;
- *p = '\0';
- PARA_INFO_LOG("%s\n", buf);
- buf = p + 1;
+ *q = '\0';
+ PARA_INFO_LOG("%s\n", p);
+ p = q + 1;
}
- snd_output_close(log);
+ snd_output_close(output_log);
}
return 1;
fail:
free(pad);
}
-static void alsa_write_post_select(__a_unused struct sched *s,
+static int alsa_write_post_select(__a_unused struct sched *s,
struct task *t)
{
struct writer_node *wn = container_of(t, struct writer_node, task);
snd_pcm_sframes_t frames;
int ret;
+ ret = task_get_notification(t);
+ if (ret < 0)
+ goto err;
again:
- t->error = 0;
ret = btr_node_status(btrn, wn->min_iqs, BTR_NT_LEAF);
if (ret == 0)
- return;
+ return 0;
btr_merge(btrn, wn->min_iqs);
bytes = btr_next_buffer(btrn, &data);
if (ret < 0 || bytes < wn->min_iqs) { /* eof */
PARA_DEBUG_LOG("waiting for device to drain\n");
tv_add(now, &(struct timeval)EMBRACE(0, 200 * 1000),
&pad->drain_barrier);
- return;
+ return 0;
}
if (tv_diff(now, &pad->drain_barrier, NULL) > 0)
goto err;
- return;
+ return 0;
}
if (!pad) {
int32_t val;
if (bytes == 0) /* no data available */
- return;
+ return 0;
pad = para_calloc(sizeof(*pad));
get_btr_sample_rate(btrn, &val);
pad->sample_rate = val;
goto again;
}
if (pad->poll_fd < 0 || !FD_ISSET(pad->poll_fd, &s->rfds))
- return;
+ return 0;
frames = bytes / pad->bytes_per_frame;
frames = snd_pcm_writei(pad->handle, data, frames);
if (frames == 0 || frames == -EAGAIN) {
char buf[100];
if (read(pad->poll_fd, buf, 100))
do_nothing;
- return;
+ return 0;
}
if (frames > 0) {
btr_consume(btrn, frames * pad->bytes_per_frame);
if (frames == -EPIPE) {
PARA_WARNING_LOG("underrun (tried to write %zu bytes)\n", bytes);
snd_pcm_prepare(pad->handle);
- return;
+ return 0;
}
PARA_ERROR_LOG("alsa write error: %s\n", snd_strerror(-frames));
ret = -E_ALSA;
err:
assert(ret < 0);
- btr_remove_node(btrn);
- t->error = ret;
+ btr_remove_node(&wn->btrn);
+ return ret;
}
-__malloc static void *alsa_parse_config_or_die(const char *options)
+__malloc static void *alsa_parse_config_or_die(int argc, char **argv)
{
struct alsa_write_args_info *conf = para_calloc(sizeof(*conf));
/* exits on errors */
- alsa_cmdline_parser_string(options, conf, "alsa_write");
+ alsa_write_cmdline_parser(argc, argv, conf);
return conf;
}
static void alsa_free_config(void *conf)
{
- alsa_cmdline_parser_free(conf);
+ alsa_write_cmdline_parser_free(conf);
}
/**
{
struct alsa_write_args_info dummy;
- alsa_cmdline_parser_init(&dummy);
+ alsa_write_cmdline_parser_init(&dummy);
w->close = alsa_close;
w->pre_select = alsa_write_pre_select;
w->post_select = alsa_write_post_select;
w->parse_config_or_die = alsa_parse_config_or_die;
- w->shutdown = NULL; /* nothing to do */
w->free_config = alsa_free_config;
- w->help = (struct ggo_help) {
- .short_help = alsa_write_args_info_help,
- .detailed_help = alsa_write_args_info_detailed_help
- };
- alsa_cmdline_parser_free(&dummy);
+ w->help = (struct ggo_help)DEFINE_GGO_HELP(alsa_write);
+ alsa_write_cmdline_parser_free(&dummy);
}