1 files changed, 76 insertions, 0 deletions
diff --git a/polyp/play-memchunk.c b/polyp/play-memchunk.c
new file mode 100644
index 00000000..5c448a75
--- /dev/null
+++ b/polyp/play-memchunk.c
@@ -0,0 +1,76 @@
+#include <stdlib.h>
+#include <assert.h>
+
+#include "play-memchunk.h"
+#include "sink-input.h"
+#include "xmalloc.h"
+
+static void sink_input_kill(struct pa_sink_input *i) {
+    struct pa_memchunk *c;
+    assert(i && i->userdata);
+    c = i->userdata;
+
+    pa_memblock_unref(c->memblock);
+    pa_xfree(c);
+    pa_sink_input_free(i);
+}
+
+static int sink_input_peek(struct pa_sink_input *i, struct pa_memchunk *chunk) {
+    struct pa_memchunk *c;
+    assert(i && chunk && i->userdata);
+    c = i->userdata;
+
+    if (c->length <= 0)
+        return -1;
+    
+    assert(c->memblock && c->memblock->length);
+    *chunk = *c;
+    pa_memblock_ref(c->memblock);
+
+    return 0;
+}
+
+static void si_kill(void *i) {
+    sink_input_kill(i);
+}
+
+static void sink_input_drop(struct pa_sink_input *i, size_t length) {
+    struct pa_memchunk *c;
+    assert(i && length && i->userdata);
+    c = i->userdata;
+
+    assert(length <= c->length);
+
+    c->length -= length;
+    c->index += length;
+
+    if (c->length <= 0)
+        pa_mainloop_api_once(i->sink->core->mainloop, si_kill, i);
+}
+
+int pa_play_memchunk(struct pa_sink *sink, const char *name, const struct pa_sample_spec *ss, const struct pa_memchunk *chunk, uint32_t volume) {
+    struct pa_sink_input *si;
+    struct pa_memchunk *nchunk;
+
+    assert(sink && chunk);
+
+    if (volume <= 0)
+        return 0;
+
+    if (!(si = pa_sink_input_new(sink, name, ss)))
+        return -1;
+
+    si->volume = volume;
+    si->peek = sink_input_peek;
+    si->drop = sink_input_drop;
+    si->kill = sink_input_kill;
+    
+    si->userdata = nchunk = pa_xmalloc(sizeof(struct pa_memchunk));
+    *nchunk = *chunk;
+    
+    pa_memblock_ref(chunk->memblock);
+
+    pa_sink_notify(sink);
+    
+    return 0;
+}