Start moving RTP decoding routines to the ui directory.

Move decode_rtp_packet to ui/rtp_media.[ch].

Change-Id: Ib138781c37ac17b807bf75f9d772351aadf72071
Reviewed-on: https://code.wireshark.org/review/10575
Petri-Dish: Gerald Combs <gerald@wireshark.org>
Tested-by: Petri Dish Buildbot <buildbot-no-reply@wireshark.org>
Reviewed-by: Gerald Combs <gerald@wireshark.org>

1 files changed, 134 insertions, 0 deletions

diff --git a/ui/rtp_media.c b/ui/rtp_media.c
new file mode 100644
index 0000000000..93f1f0b8ea
--- /dev/null
+++ b/ui/rtp_media.c
@@ -0,0 +1,134 @@
+/* rtp_media.c
+ *
+ * RTP decoding routines for Wireshark.
+ * Copied from ui/gtk/rtp_player.c
+ *
+ * Copyright 2006, Alejandro Vaquero <alejandrovaquero@yahoo.com>
+ *
+ * Wireshark - Network traffic analyzer
+ * By Gerald Combs <gerald@wireshark.org>
+ * Copyright 1999 Gerald Combs
+ *
+ * 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., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+ */
+
+#include "config.h"
+
+#include <codecs/codecs.h>
+
+#include <epan/rtp_pt.h>
+#include <epan/dissectors/packet-rtp.h>
+
+#include <ui/rtp_media.h>
+
+/****************************************************************************/
+/* DECODING */
+/****************************************************************************/
+
+typedef struct _rtp_decoder_t {
+    codec_handle_t handle;
+    void *context;
+} rtp_decoder_t;
+
+/****************************************************************************/
+/*
+ * Return the number of decoded bytes
+ */
+
+size_t
+decode_rtp_packet(rtp_packet_t *rp, SAMPLE **out_buff, GHashTable *decoders_hash, unsigned *channels_ptr, unsigned *sample_rate_ptr)
+{
+    unsigned int  payload_type;
+    const gchar *p;
+    rtp_decoder_t *decoder;
+    SAMPLE *tmp_buff = NULL;
+    size_t tmp_buff_len;
+    size_t decoded_bytes = 0;
+
+    if ((rp->payload_data == NULL) || (rp->info->info_payload_len == 0) ) {
+        return 0;
+    }
+
+    payload_type = rp->info->info_payload_type;
+
+    /* Look for registered codecs */
+    decoder = (rtp_decoder_t *)g_hash_table_lookup(decoders_hash, GUINT_TO_POINTER(payload_type));
+    if (!decoder) {  /* Put either valid or empty decoder into the hash table */
+        decoder = g_new(rtp_decoder_t,1);
+        decoder->handle = NULL;
+        decoder->context = NULL;
+
+        if (rp->info->info_payload_type_str && find_codec(rp->info->info_payload_type_str)) {
+            p = rp->info->info_payload_type_str;
+        } else {
+            p = try_val_to_str_ext(payload_type, &rtp_payload_type_short_vals_ext);
+        }
+
+        if (p) {
+            decoder->handle = find_codec(p);
+            if (decoder->handle)
+                decoder->context = codec_init(decoder->handle);
+        }
+        g_hash_table_insert(decoders_hash, GUINT_TO_POINTER(payload_type), decoder);
+    }
+    if (decoder->handle) {  /* Decode with registered codec */
+        tmp_buff_len = codec_decode(decoder->handle, decoder->context, rp->payload_data, rp->info->info_payload_len, NULL, NULL);
+        tmp_buff = (SAMPLE *)g_malloc(tmp_buff_len);
+        decoded_bytes = codec_decode(decoder->handle, decoder->context, rp->payload_data, rp->info->info_payload_len, tmp_buff, &tmp_buff_len);
+        *out_buff = tmp_buff;
+
+        if (channels_ptr) {
+            *channels_ptr = codec_get_channels(decoder->handle, decoder->context);
+        }
+
+        if (sample_rate_ptr) {
+            *sample_rate_ptr = codec_get_frequency(decoder->handle, decoder->context);
+        }
+
+        return decoded_bytes;
+    }
+
+    *out_buff = NULL;
+    return 0;
+}
+
+/****************************************************************************/
+static void
+rtp_decoder_value_destroy(gpointer dec_arg)
+{
+    rtp_decoder_t *dec = (rtp_decoder_t *)dec_arg;
+
+    if (dec->handle)
+        codec_release(dec->handle, dec->context);
+    g_free(dec_arg);
+}
+
+GHashTable *rtp_decoder_hash_table_new(void)
+{
+    return g_hash_table_new_full(g_direct_hash, g_direct_equal, NULL, rtp_decoder_value_destroy);
+}
+
+/*
+ * 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:
+ */