RTP: Add support for SBC codec in RTP Player

Add optional dependancy to libsbc to play Bluetooth SBC in
A2DP payload. Also simplify RTP Player and extent codec interface.

Change-Id: I52e1fce9c82e2885736354fe73c6c37168a4fda3
Reviewed-on: https://code.wireshark.org/review/19
Reviewed-by: Alexis La Goutte <alexis.lagoutte@gmail.com>
Reviewed-by: Evan Huus <eapache@gmail.com>

1 files changed, 57 insertions, 11 deletions

diff --git a/codecs/G711a/G711adecode.c b/codecs/G711a/G711adecode.c
index 10fe3e2cc1..e5518932cc 100644
--- a/codecs/G711a/G711adecode.c
+++ b/codecs/G711a/G711adecode.c
@@ -22,21 +22,67 @@
  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
  */
 
+#include "config.h"
+
 #include <glib.h>
+
 #include "G711adecode.h"
 #include "G711atable.h"
 
+void *
+codec_g711a_init(void)
+{
+    return NULL;
+}
+
+void
+codec_g711a_release(void *ctx _U_)
+{
+
+}
+
+int
+codec_g711a_get_channels(void *ctx _U_)
+{
+    return 1;
+}
+
+int
+codec_g711a_get_frequency(void *ctx _U_)
+{
+    return 8000;
+}
+
 int
-decodeG711a(void *input, int inputSizeBytes, void *output, int *outputSizeBytes)
+codec_g711a_decode(void *ctx _U_, const void *input, int inputSizeBytes, void *output,
+        int *outputSizeBytes)
 {
-  guint8 *dataIn = (guint8 *)input;
-  gint16 *dataOut = (gint16 *)output;
-  int i;
-
-  for (i=0; i<inputSizeBytes; i++)
-  {
-    dataOut[i] = alaw_exp_table[dataIn[i]];
-  }
-  *outputSizeBytes = inputSizeBytes * 2;
-  return 0;
+    const guint8 *dataIn = (const guint8 *) input;
+    gint16       *dataOut = (gint16 *) output;
+    int           i;
+
+    if (!output || !outputSizeBytes) {
+        return inputSizeBytes * 2;
+    }
+
+    for (i = 0; i < inputSizeBytes; i++)
+    {
+        dataOut[i] = alaw_exp_table[dataIn[i]];
+    }
+
+    *outputSizeBytes = inputSizeBytes * 2;
+    return inputSizeBytes * 2;
 }
+
+/*
+ * Editor modelines  -  http://www.wireshark.org/tools/modelines.html
+ *
+ * Local variables:
+ * c-basic-offset: 4
+ * tab-width: 8
+ * indent-tabs-mode: nil
+ * End:
+ *
+ * vi: set shiftwidth=4 tabstop=8 expandtab:
+ * :indentSize=4:tabSize=8:noTabs=true:
+ */