From e4ba6dbc3f1e76890b22773807ea37fe8fa2b1bc Mon Sep 17 00:00:00 2001
From: Daniel Baumann <daniel.baumann@progress-linux.org>
Date: Wed, 10 Apr 2024 22:34:10 +0200
Subject: Adding upstream version 4.2.2.

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
---
 ui/rtp_media.c | 128 +++++++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 128 insertions(+)
 create mode 100644 ui/rtp_media.c

(limited to 'ui/rtp_media.c')

diff --git a/ui/rtp_media.c b/ui/rtp_media.c
new file mode 100644
index 0000000..fe69c2d
--- /dev/null
+++ b/ui/rtp_media.c
@@ -0,0 +1,128 @@
+/* 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
+ *
+ * SPDX-License-Identifier: GPL-2.0-or-later
+ */
+
+#include "config.h"
+
+#include <wsutil/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;
+    codec_context_t *context;
+} rtp_decoder_t;
+
+/****************************************************************************/
+/*
+ * Return the number of decoded bytes
+ */
+
+size_t
+decode_rtp_packet_payload(guint8 payload_type, const gchar *payload_type_str, int payload_rate, int payload_channels, wmem_map_t *payload_fmtp_map, guint8 *payload_data, size_t payload_len, SAMPLE **out_buff, GHashTable *decoders_hash, guint *channels_ptr, guint *sample_rate_ptr)
+{
+    const gchar *p;
+    rtp_decoder_t *decoder;
+    SAMPLE *tmp_buff = NULL;
+    size_t tmp_buff_len;
+    size_t decoded_bytes = 0;
+
+    /* 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 = g_new(codec_context_t, 1);
+        decoder->context->sample_rate = payload_rate;
+        decoder->context->channels = payload_channels;
+        decoder->context->fmtp_map = payload_fmtp_map;
+        decoder->context->priv = NULL;
+
+        if (payload_type_str && find_codec(payload_type_str)) {
+            p = 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->priv = codec_init(decoder->handle, decoder->context);
+        }
+        g_hash_table_insert(decoders_hash, GUINT_TO_POINTER(payload_type), decoder);
+    }
+    if (decoder->handle) {  /* Decode with registered codec */
+        /* if output == NULL and outputSizeBytes == NULL => ask for expected size of the buffer */
+        tmp_buff_len = codec_decode(decoder->handle, decoder->context, payload_data, payload_len, NULL, NULL);
+        tmp_buff = (SAMPLE *)g_malloc(tmp_buff_len);
+        decoded_bytes = codec_decode(decoder->handle, decoder->context, payload_data, 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;
+}
+
+/****************************************************************************/
+/*
+ * @return Number of decoded bytes
+ */
+
+size_t
+decode_rtp_packet(rtp_packet_t *rp, SAMPLE **out_buff, GHashTable *decoders_hash, guint *channels_ptr, guint *sample_rate_ptr)
+{
+    guint8  payload_type;
+
+    if ((rp->payload_data == NULL) || (rp->info->info_payload_len == 0) ) {
+        return 0;
+    }
+
+    payload_type = rp->info->info_payload_type;
+
+    return decode_rtp_packet_payload(payload_type, rp->info->info_payload_type_str, rp->info->info_payload_rate, rp->info->info_payload_channels, rp->info->info_payload_fmtp_map, rp->payload_data, rp->info->info_payload_len, out_buff, decoders_hash, channels_ptr, sample_rate_ptr);
+}
+
+/****************************************************************************/
+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->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);
+}
-- 
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