add null sink

git-svn-id: file:///home/lennart/svn/public/pulseaudio/trunk@259 fefdeb5f-60dc-0310-8127-8f9354f1896f

polyp/Makefile.am

@@ -33,14 +33,15 @@ AM_LDADD=$(PTHREAD_LIBS) -lm
 AM_LIBADD=$(PTHREAD_LIBS) -lm
 
 EXTRA_DIST = default.pa.in daemon.conf.in client.conf.in depmod.py esdcompat.sh.in
-bin_PROGRAMS = polypaudio pacat pactl paplay voltest
+bin_PROGRAMS = polypaudio pacat pactl paplay
 bin_SCRIPTS = esdcompat.sh
 noinst_PROGRAMS = \
 		mainloop-test \
 		pacat-simple \
 		parec-simple \
 		cpulimit-test \
-		cpulimit-test2
+		cpulimit-test2 \
+		voltest
 
 polypconf_DATA=default.pa daemon.conf client.conf
 
@@ -108,7 +109,8 @@ modlib_LTLIBRARIES= \
 		module-esound-compat-spawnpid.la \
 		module-match.la \
 		module-tunnel-sink.la \
-		module-tunnel-source.la
+		module-tunnel-source.la \
+		module-null-sink.la
 
 lib_LTLIBRARIES= \
 		libpolyp-@PA_MAJORMINOR@.la \
@@ -308,6 +310,10 @@ module_combine_la_SOURCES = module-combine.c
 module_combine_la_LDFLAGS = -module -avoid-version
 module_combine_la_LIBADD = $(AM_LIBADD)
 
+module_null_sink_la_SOURCES = module-null-sink.c
+module_null_sink_la_LDFLAGS = -module -avoid-version
+module_null_sink_la_LIBADD = $(AM_LIBADD)
+
 module_match_la_SOURCES = module-match.c
 module_match_la_LDFLAGS = -module -avoid-version
 module_match_la_LIBADD = $(AM_LIBADD)

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);
+}

polyp/module-pipe-sink.c

@@ -162,9 +162,10 @@ int pa__init(struct pa_core *c, struct pa_module*m) {
     }
 
     u = pa_xmalloc0(sizeof(struct userdata));
-
     u->filename = pa_xstrdup(p);
     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");
@@ -187,9 +188,6 @@ int pa__init(struct pa_core *c, struct pa_module*m) {
     assert(u->defer_event);
     c->mainloop->defer_enable(u->defer_event, 0);
 
-    u->module = m;
-    m->userdata = u;
-
     pa_modargs_free(ma);
     
     return 0;

polyp/voltest.c

@@ -1,3 +1,5 @@
+/* $Id$ */
+
 #include <stdio.h>
 
 #include <polyp/sample.h>