diff options
author | Lennart Poettering <lennart@poettering.net> | 2004-10-27 14:42:56 +0000 |
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committer | Lennart Poettering <lennart@poettering.net> | 2004-10-27 14:42:56 +0000 |
commit | 19f2acbd0a9d199b77ad71eaf206319f6f12e323 (patch) | |
tree | 48e505f99c7c5315bae0466026f2db17a1985066 /polyp/module-null-sink.c | |
parent | 49e16ffc6c87fd879e4143730fd211560ffee0a4 (diff) |
add null sink
git-svn-id: file:///home/lennart/svn/public/pulseaudio/trunk@259 fefdeb5f-60dc-0310-8127-8f9354f1896f
Diffstat (limited to 'polyp/module-null-sink.c')
-rw-r--r-- | polyp/module-null-sink.c | 148 |
1 files changed, 148 insertions, 0 deletions
diff --git a/polyp/module-null-sink.c b/polyp/module-null-sink.c new file mode 100644 index 00000000..e48e9668 --- /dev/null +++ b/polyp/module-null-sink.c @@ -0,0 +1,148 @@ +/* $Id$ */ + +/*** + 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 <stdlib.h> +#include <sys/stat.h> +#include <stdio.h> +#include <assert.h> +#include <errno.h> +#include <string.h> +#include <fcntl.h> +#include <unistd.h> +#include <limits.h> + +#include "iochannel.h" +#include "sink.h" +#include "module.h" +#include "util.h" +#include "modargs.h" +#include "xmalloc.h" +#include "log.h" + +PA_MODULE_AUTHOR("Lennart Poettering") +PA_MODULE_DESCRIPTION("Clocked NULL sink") +PA_MODULE_VERSION(PACKAGE_VERSION) +PA_MODULE_USAGE("format=<sample format> channels=<number of channels> rate=<sample rate> sink_name=<name of sink>") + +#define DEFAULT_SINK_NAME "null" + +struct userdata { + struct pa_core *core; + struct pa_module *module; + struct pa_sink *sink; + struct pa_time_event *time_event; + size_t block_size; +}; + +static const char* const valid_modargs[] = { + "rate", + "format", + "channels", + "sink_name", + NULL +}; + +static void time_callback(struct pa_mainloop_api *m, struct pa_time_event*e, const struct timeval *tv, void *userdata) { + struct userdata *u = userdata; + struct pa_memchunk chunk; + struct timeval ntv = *tv; + size_t l; + + assert(u); + + if (pa_sink_render(u->sink, u->block_size, &chunk) >= 0) { + l = chunk.length; + pa_memblock_unref(chunk.memblock); + } else + l = u->block_size; + + pa_timeval_add(&ntv, pa_bytes_to_usec(l, &u->sink->sample_spec)); + m->time_restart(e, &ntv); +} + +int pa__init(struct pa_core *c, struct pa_module*m) { + struct userdata *u = NULL; + struct pa_sample_spec ss; + struct pa_modargs *ma = NULL; + struct timeval tv; + assert(c && m); + + 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__": invalid sample format specification\n"); + goto fail; + } + + u = pa_xmalloc0(sizeof(struct userdata)); + u->core = c; + u->module = m; + m->userdata = u; + + if (!(u->sink = pa_sink_new(c, pa_modargs_get_value(ma, "sink_name", DEFAULT_SINK_NAME), 0, &ss))) { + pa_log(__FILE__": failed to create sink.\n"); + goto fail; + } + + u->sink->userdata = u; + pa_sink_set_owner(u->sink, m); + u->sink->description = pa_sprintf_malloc("NULL sink"); + + gettimeofday(&tv, NULL); + u->time_event = c->mainloop->time_new(c->mainloop, &tv, time_callback, u); + + u->block_size = pa_bytes_per_second(&ss) / 10; + + pa_modargs_free(ma); + + return 0; + +fail: + if (ma) + pa_modargs_free(ma); + + pa__done(c, m); + + return -1; +} + +void pa__done(struct pa_core *c, struct pa_module*m) { + struct userdata *u; + assert(c && m); + + if (!(u = m->userdata)) + return; + + pa_sink_disconnect(u->sink); + pa_sink_unref(u->sink); + + u->core->mainloop->time_free(u->time_event); + + pa_xfree(u); +} |