1 /* rtp_media.h 2 * 3 * RTP decoding routines for Wireshark. 4 * Copied from ui/gtk/rtp_player.c 5 * 6 * Copyright 2006, Alejandro Vaquero <alejandrovaquero@yahoo.com> 7 * 8 * Wireshark - Network traffic analyzer 9 * By Gerald Combs <gerald@wireshark.org> 10 * Copyright 1999 Gerald Combs 11 * 12 * SPDX-License-Identifier: GPL-2.0-or-later 13 */ 14 15 #ifndef __RTP_MEDIA_H__ 16 #define __RTP_MEDIA_H__ 17 18 #include <glib.h> 19 20 /** @file 21 * "RTP Player" dialog box common routines. 22 * @ingroup main_ui_group 23 */ 24 25 #ifdef __cplusplus 26 extern "C" { 27 #endif /* __cplusplus */ 28 29 /****************************************************************************/ 30 /* INTERFACE */ 31 /****************************************************************************/ 32 33 typedef gint16 SAMPLE; 34 #define SAMPLE_MAX G_MAXINT16 35 #define SAMPLE_MIN G_MININT16 36 #define SAMPLE_NaN SAMPLE_MIN 37 #define SAMPLE_BYTES (sizeof(SAMPLE) / sizeof(char)) 38 39 /* Defines an RTP packet */ 40 typedef struct _rtp_packet { 41 guint32 frame_num; /* Qt only */ 42 struct _rtp_info *info; /* the RTP dissected info */ 43 double arrive_offset; /* arrive offset time since the beginning of the stream as ms in GTK UI and s in Qt UI */ 44 guint8* payload_data; 45 } rtp_packet_t; 46 47 /** Create a new hash table. 48 * 49 * @return A new hash table suitable for passing to decode_rtp_packet. 50 */ 51 GHashTable *rtp_decoder_hash_table_new(void); 52 53 /** Decode payload from an RTP packet 54 * 55 * @param payload_type Payload number 56 * @param payload_type_str Payload name, can be NULL 57 * @param payload_data Payload 58 * @param payload_len Length of payload 59 * @param out_buff Output audio samples. 60 * @param decoders_hash Hash table created with rtp_decoder_hash_table_new. 61 * @param channels_ptr If non-NULL, receives the number of channels in the sample. 62 * @param sample_rate_ptr If non-NULL, receives the sample rate. 63 * @return The number of decoded bytes on success, 0 on failure. 64 */ 65 size_t decode_rtp_packet_payload(guint8 payload_type, const gchar *payload_type_str, guint8 *payload_data, size_t payload_len, SAMPLE **out_buff, GHashTable *decoders_hash, guint *channels_ptr, guint *sample_rate_ptr); 66 67 /** Decode an RTP packet 68 * 69 * @param rp Wrapper for per-packet RTP tap data. 70 * @param out_buff Output audio samples. 71 * @param decoders_hash Hash table created with rtp_decoder_hash_table_new. 72 * @param channels_ptr If non-NULL, receives the number of channels in the sample. 73 * @param sample_rate_ptr If non-NULL, receives the sample rate. 74 * @return The number of decoded bytes on success, 0 on failure. 75 */ 76 size_t decode_rtp_packet(rtp_packet_t *rp, SAMPLE **out_buff, GHashTable *decoders_hash, guint *channels_ptr, guint *sample_rate_ptr); 77 78 #ifdef __cplusplus 79 } 80 #endif /* __cplusplus */ 81 82 #endif /* __RTP_MEDIA_H__ */ 83