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/** @file
*
* 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
*/
#ifndef __RTP_MEDIA_H__
#define __RTP_MEDIA_H__
#include <glib.h>
#include <wsutil/wmem/wmem_map.h>
/** @file
* "RTP Player" dialog box common routines.
* @ingroup main_ui_group
*/
#ifdef __cplusplus
extern "C" {
#endif /* __cplusplus */
/****************************************************************************/
/* INTERFACE */
/****************************************************************************/
typedef gint16 SAMPLE;
#define SAMPLE_MAX G_MAXINT16
#define SAMPLE_MIN G_MININT16
#define SAMPLE_NaN SAMPLE_MIN
#define SAMPLE_BYTES (sizeof(SAMPLE) / sizeof(char))
/* Defines an RTP packet */
typedef struct _rtp_packet {
guint32 frame_num; /* Qt only */
struct _rtp_info *info; /* the RTP dissected info */
double arrive_offset; /* arrive offset time since the beginning of the stream as ms in GTK UI and s in Qt UI */
guint8* payload_data;
} rtp_packet_t;
/** Create a new hash table.
*
* @return A new hash table suitable for passing to decode_rtp_packet.
*/
GHashTable *rtp_decoder_hash_table_new(void);
/** Decode payload from an RTP packet
* For RTP packets with dynamic payload types, the payload name, clock rate,
* and number of audio channels (e.g., from the SDP) can be provided.
* Note that the output sample rate and number of channels might not be the
* same as that of the input.
*
* @param payload_type Payload number
* @param payload_type_str Payload name, can be NULL
* @param payload_rate Sample rate, can be 0 for codec default
* @param payload_channels Audio channels, can be 0 for codec default
* @param payload_fmtp_map Map of format parameters for the media type
* @param payload_data Payload
* @param payload_len Length of payload
* @param out_buff Output audio samples.
* @param decoders_hash Hash table created with rtp_decoder_hash_table_new.
* @param channels_ptr If non-NULL, receives the number of channels in the sample.
* @param sample_rate_ptr If non-NULL, receives the sample rate.
* @return The number of decoded bytes on success, 0 on failure.
*/
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);
/** Decode an RTP packet
*
* @param rp Wrapper for per-packet RTP tap data.
* @param out_buff Output audio samples.
* @param decoders_hash Hash table created with rtp_decoder_hash_table_new.
* @param channels_ptr If non-NULL, receives the number of channels in the sample.
* @param sample_rate_ptr If non-NULL, receives the sample rate.
* @return The number of decoded bytes on success, 0 on failure.
*/
size_t decode_rtp_packet(rtp_packet_t *rp, SAMPLE **out_buff, GHashTable *decoders_hash, guint *channels_ptr, guint *sample_rate_ptr);
#ifdef __cplusplus
}
#endif /* __cplusplus */
#endif /* __RTP_MEDIA_H__ */
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