introduce pa_play_memblockq() which creates a playback stream and passes the data from the memblockq to it. after that is done, frees the memblockq

git-svn-id: file:///home/lennart/svn/public/pulseaudio/trunk@1161 fefdeb5f-60dc-0310-8127-8f9354f1896f

1 files changed, 113 insertions, 0 deletions

diff --git a/src/pulsecore/play-memblockq.c b/src/pulsecore/play-memblockq.c
new file mode 100644
index 00000000..2df3b952
--- /dev/null
+++ b/src/pulsecore/play-memblockq.c
@@ -0,0 +1,113 @@
+/* $Id$ */
+
+/***
+  This file is part of PulseAudio.
+ 
+  PulseAudio 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.
+ 
+  PulseAudio 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 PulseAudio; 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 <assert.h>
+#include <stdio.h>
+#include <string.h>
+
+#include <pulse/xmalloc.h>
+
+#include <pulsecore/sink-input.h>
+#include <pulsecore/gccmacro.h>
+
+#include "play-memblockq.h"
+
+static void sink_input_kill(pa_sink_input *i) {
+    pa_memblockq *q;
+    assert(i);
+    assert(i->userdata);
+
+    q = i->userdata;
+
+    pa_sink_input_disconnect(i);
+    pa_sink_input_unref(i);
+
+    pa_memblockq_free(q);
+}
+
+static int sink_input_peek(pa_sink_input *i, pa_memchunk *chunk) {
+    pa_memblockq *q;
+    assert(i);
+    assert(chunk);
+    assert(i->userdata);
+
+    q = i->userdata;
+
+    return pa_memblockq_peek(q, chunk);
+}
+
+static void si_kill(PA_GCC_UNUSED pa_mainloop_api *m, void *i) {
+    sink_input_kill(i);
+}
+
+static void sink_input_drop(pa_sink_input *i, const pa_memchunk*chunk, size_t length) {
+    pa_memblockq *q;
+    
+    assert(i);
+    assert(length > 0);
+    assert( i->userdata);
+    
+    q = i->userdata;
+
+    pa_memblockq_drop(q, chunk, length);
+
+    if (pa_memblockq_get_length(q) <= 0)
+        pa_mainloop_api_once(i->sink->core->mainloop, si_kill, i);
+}
+
+int pa_play_memblockq(
+    pa_sink *sink,
+    const char *name,
+    const pa_sample_spec *ss,
+    const pa_channel_map *map,
+    pa_memblockq *q,
+    pa_cvolume *cvolume) {
+    
+    pa_sink_input *si;
+
+    assert(sink);
+    assert(ss);
+    assert(q);
+
+    if (pa_memblockq_get_length(q) <= 0)
+        return 0;
+
+    if (cvolume && pa_cvolume_is_muted(cvolume))
+        return 0;
+
+    if (!(si = pa_sink_input_new(sink, name, __FILE__, ss, map, cvolume, 0, PA_RESAMPLER_INVALID)))
+        return -1;
+
+    si->peek = sink_input_peek;
+    si->drop = sink_input_drop;
+    si->kill = sink_input_kill;
+    
+    si->userdata = q;
+
+    pa_sink_notify(sink);
+    
+    return 0;
+}