1 files changed, 107 insertions, 0 deletions
diff --git a/pjmedia/src/pjmedia/null_port.c b/pjmedia/src/pjmedia/null_port.c
new file mode 100644
index 00000000..55faaf4b
--- /dev/null
+++ b/pjmedia/src/pjmedia/null_port.c
@@ -0,0 +1,107 @@
+/* $Id$ */
+/* 
+ * Copyright (C) 2003-2006 Benny Prijono <benny@prijono.org>
+ *
+ * This program 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.
+ *
+ * This program 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 this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA 
+ */
+#include <pjmedia/null_port.h>
+#include <pjmedia/errno.h>
+#include <pj/assert.h>
+#include <pj/pool.h>
+#include <pj/string.h>
+
+
+static pj_status_t null_get_frame(pjmedia_port *this_port, 
+				  pjmedia_frame *frame);
+static pj_status_t null_put_frame(pjmedia_port *this_port, 
+				  const pjmedia_frame *frame);
+static pj_status_t null_on_destroy(pjmedia_port *this_port);
+
+
+PJ_DEF(pj_status_t) pjmedia_null_port_create( pj_pool_t *pool,
+					      unsigned sampling_rate,
+					      unsigned samples_per_frame,
+					      unsigned bits_per_sample,
+					      pjmedia_port **p_port )
+{
+    pjmedia_port *port;
+
+    PJ_ASSERT_RETURN(pool && p_port, PJ_EINVAL);
+
+    port = pj_pool_zalloc(pool, sizeof(pjmedia_port));
+    PJ_ASSERT_RETURN(pool != NULL, PJ_ENOMEM);
+
+    port->info.bits_per_sample = bits_per_sample;
+    port->info.bytes_per_frame = samples_per_frame * bits_per_sample / 8;
+    port->info.encoding_name = pj_str("pcm");
+    port->info.has_info = 1;
+    port->info.name = pj_str("null-port");
+    port->info.need_info = 0;
+    port->info.pt = 0xFF;
+    port->info.sample_rate = sampling_rate;
+    port->info.samples_per_frame = samples_per_frame;
+    port->info.signature = 0x2411;
+    port->info.type = PJMEDIA_TYPE_AUDIO;
+
+    port->get_frame = &null_get_frame;
+    port->put_frame = &null_put_frame;
+    port->on_destroy = &null_on_destroy;
+
+
+    *p_port = port;
+    
+    return PJ_SUCCESS;
+}
+
+
+
+/*
+ * Put frame to file.
+ */
+static pj_status_t null_put_frame(pjmedia_port *this_port, 
+				  const pjmedia_frame *frame)
+{
+    PJ_UNUSED_ARG(this_port);
+    PJ_UNUSED_ARG(frame);
+    return PJ_SUCCESS;
+}
+
+
+/*
+ * Get frame from file.
+ */
+static pj_status_t null_get_frame(pjmedia_port *this_port, 
+				  pjmedia_frame *frame)
+{
+    unsigned i, count;
+    pj_int16_t *samples = frame->buf;
+
+    count = this_port->info.samples_per_frame;
+    for (i=0; i<count; ++i) {
+	samples[i] = 0;
+    }
+
+    return PJ_SUCCESS;
+}
+
+
+/*
+ * Destroy port.
+ */
+static pj_status_t null_on_destroy(pjmedia_port *this_port)
+{
+    PJ_UNUSED_ARG(this_port);
+    return PJ_SUCCESS;
+}