1 files changed, 218 insertions, 0 deletions
diff --git a/polyp/module-pipe-sink.c b/polyp/module-pipe-sink.c
new file mode 100644
index 00000000..df34f73a
--- /dev/null
+++ b/polyp/module-pipe-sink.c
@@ -0,0 +1,218 @@
+/* $Id$ */
+
+/***
+  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"
+
+#define DEFAULT_FIFO_NAME "/tmp/musicfifo"
+#define DEFAULT_SINK_NAME "fifo_output"
+
+struct userdata {
+    struct pa_core *core;
+
+    char *filename;
+    
+    struct pa_sink *sink;
+    struct pa_iochannel *io;
+    void *mainloop_source;
+
+    struct pa_memchunk memchunk;
+};
+
+static const char* const valid_modargs[] = {
+    "file",
+    "rate",
+    "channels",
+    "format",
+    "sink_name",
+    NULL
+};
+
+static void do_write(struct userdata *u) {
+    ssize_t r;
+    assert(u);
+
+    u->core->mainloop->enable_fixed(u->core->mainloop, u->mainloop_source, 0);
+        
+    if (!pa_iochannel_is_writable(u->io))
+        return;
+
+    if (!u->memchunk.length)
+        if (pa_sink_render(u->sink, PIPE_BUF, &u->memchunk) < 0)
+            return;
+
+    assert(u->memchunk.memblock && u->memchunk.length);
+    
+    if ((r = pa_iochannel_write(u->io, u->memchunk.memblock->data + u->memchunk.index, u->memchunk.length)) < 0) {
+        fprintf(stderr, "write() failed: %s\n", strerror(errno));
+        return;
+    }
+
+    u->memchunk.index += r;
+    u->memchunk.length -= r;
+        
+    if (u->memchunk.length <= 0) {
+        pa_memblock_unref(u->memchunk.memblock);
+        u->memchunk.memblock = NULL;
+    }
+}
+
+static void notify_cb(struct pa_sink*s) {
+    struct userdata *u = s->userdata;
+    assert(s && u);
+
+    if (pa_iochannel_is_writable(u->io))
+        u->core->mainloop->enable_fixed(u->core->mainloop, u->mainloop_source, 1);
+}
+
+static void fixed_callback(struct pa_mainloop_api *m, void *id, void *userdata) {
+    struct userdata *u = userdata;
+    assert(u);
+    do_write(u);
+}
+
+static void io_callback(struct pa_iochannel *io, void*userdata) {
+    struct userdata *u = userdata;
+    assert(u);
+    do_write(u);
+}
+
+int pa_module_init(struct pa_core *c, struct pa_module*m) {
+    struct userdata *u = NULL;
+    struct stat st;
+    const char *p;
+    int fd = -1;
+    struct pa_sample_spec ss;
+    struct pa_modargs *ma = NULL;
+    assert(c && m);
+    
+    if (!(ma = pa_modargs_new(m->argument, valid_modargs))) {
+        fprintf(stderr, __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__": invalid sample format specification\n");
+        goto fail;
+    }
+    
+    mkfifo(p = pa_modargs_get_value(ma, "file", DEFAULT_FIFO_NAME), 0777);
+
+    if ((fd = open(p, O_RDWR)) < 0) {
+        fprintf(stderr, __FILE__": open('%s'): %s\n", p, strerror(errno));
+        goto fail;
+    }
+
+    if (fstat(fd, &st) < 0) {
+        fprintf(stderr, __FILE__": fstat('%s'): %s\n", p, strerror(errno));
+        goto fail;
+    }
+
+    if (!S_ISFIFO(st.st_mode)) {
+        fprintf(stderr, __FILE__": '%s' is not a FIFO.\n", p);
+        goto fail;
+    }
+
+    u = malloc(sizeof(struct userdata));
+    assert(u);
+    memset(u, 0, sizeof(struct userdata));
+
+    u->filename = strdup(p);
+    assert(u->filename);
+    u->core = c;
+    
+    if (!(u->sink = pa_sink_new(c, pa_modargs_get_value(ma, "sink_name", DEFAULT_SINK_NAME), 0, &ss))) {
+        fprintf(stderr, __FILE__": failed to create sink.\n");
+        goto fail;
+    }
+    u->sink->notify = notify_cb;
+    u->sink->userdata = u;
+    pa_sink_set_owner(u->sink, m);
+    u->sink->description = pa_sprintf_malloc("Unix FIFO sink '%s'", p);
+    assert(u->sink->description);
+
+    u->io = pa_iochannel_new(c->mainloop, -1, fd);
+    assert(u->io);
+    pa_iochannel_set_callback(u->io, io_callback, u);
+
+    u->memchunk.memblock = NULL;
+    u->memchunk.length = 0;
+
+    u->mainloop_source = c->mainloop->source_fixed(c->mainloop, fixed_callback, u);
+    assert(u->mainloop_source);
+    c->mainloop->enable_fixed(c->mainloop, u->mainloop_source, 0);
+        
+    m->userdata = u;
+
+    pa_modargs_free(ma);
+    
+    return 0;
+
+fail:
+    if (ma)
+        pa_modargs_free(ma);
+        
+    if (fd >= 0)
+        close(fd);
+
+    pa_module_done(c, m);
+
+    return -1;
+}
+
+void pa_module_done(struct pa_core *c, struct pa_module*m) {
+    struct userdata *u;
+    assert(c && m);
+
+    if (!(u = m->userdata))
+        return;
+    
+    if (u->memchunk.memblock)
+        pa_memblock_unref(u->memchunk.memblock);
+        
+    pa_sink_free(u->sink);
+    pa_iochannel_free(u->io);
+    u->core->mainloop->cancel_fixed(u->core->mainloop, u->mainloop_source);
+
+    assert(u->filename);
+    unlink(u->filename);
+    free(u->filename);
+    
+    free(u);
+}