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-
- /*
- * NetJack - Packet Handling functions
- *
- * used by the driver and the jacknet_client
- *
- * Copyright (C) 2006 Torben Hohn <torbenh@gmx.de>
- *
- * 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., 675 Mass Ave, Cambridge, MA 02139, USA.
- *
- * $Id: net_driver.c,v 1.16 2006/03/20 19:41:37 torbenh Exp $
- *
- */
-
- #ifndef __JACK_NET_PACKET_H__
- #define __JACK_NET_PACKET_H__
-
- #ifdef __cplusplus
- extern "C"
- {
- #endif
-
- #include <jack/jack.h>
- #include <jack/types.h>
- #include <jack/jslist.h>
- #include <jack/midiport.h>
-
- // The Packet Header.
-
- #define CELT_MODE 1000 // Magic bitdepth value that indicates CELT compression
- #define OPUS_MODE 999 // Magic bitdepth value that indicates OPUS compression
- #define MASTER_FREEWHEELS 0x80000000
-
- typedef struct _jacknet_packet_header jacknet_packet_header;
-
- struct _jacknet_packet_header {
- // General AutoConf Data
- jack_nframes_t capture_channels_audio;
- jack_nframes_t playback_channels_audio;
- jack_nframes_t capture_channels_midi;
- jack_nframes_t playback_channels_midi;
- jack_nframes_t period_size;
- jack_nframes_t sample_rate;
-
- // Transport Sync
- jack_nframes_t sync_state;
- jack_nframes_t transport_frame;
- jack_nframes_t transport_state;
-
- // Packet loss Detection, and latency reduction
- jack_nframes_t framecnt;
- jack_nframes_t latency;
-
- jack_nframes_t reply_port;
- jack_nframes_t mtu;
- jack_nframes_t fragment_nr;
- };
-
- typedef union _int_float int_float_t;
-
- union _int_float {
- uint32_t i;
- float f;
- };
-
- // fragment reorder cache.
- typedef struct _cache_packet cache_packet;
-
- struct _cache_packet {
- int valid;
- int num_fragments;
- int packet_size;
- int mtu;
- jack_time_t recv_timestamp;
- jack_nframes_t framecnt;
- char * fragment_array;
- char * packet_buf;
- };
-
- typedef struct _packet_cache packet_cache;
-
- struct _packet_cache {
- int size;
- cache_packet *packets;
- int mtu;
- struct sockaddr_in master_address;
- int master_address_valid;
- jack_nframes_t last_framecnt_retreived;
- int last_framecnt_retreived_valid;
- };
-
- // fragment cache function prototypes
- // XXX: Some of these are private.
- packet_cache *packet_cache_new(int num_packets, int pkt_size, int mtu);
- void packet_cache_free(packet_cache *pkt_cache);
-
- cache_packet *packet_cache_get_packet(packet_cache *pkt_cache, jack_nframes_t framecnt);
- cache_packet *packet_cache_get_oldest_packet(packet_cache *pkt_cache);
- cache_packet *packet_cache_get_free_packet(packet_cache *pkt_cache);
-
- void cache_packet_reset(cache_packet *pack);
- void cache_packet_set_framecnt(cache_packet *pack, jack_nframes_t framecnt);
- void cache_packet_add_fragment(cache_packet *pack, char *packet_buf, int rcv_len);
- int cache_packet_is_complete(cache_packet *pack);
-
- void packet_cache_drain_socket( packet_cache *pcache, int sockfd );
- void packet_cache_reset_master_address( packet_cache *pcache );
- float packet_cache_get_fill( packet_cache *pcache, jack_nframes_t expected_framecnt );
- int packet_cache_retreive_packet_pointer( packet_cache *pcache, jack_nframes_t framecnt, char **packet_buf, int pkt_size, jack_time_t *timestamp );
- int packet_cache_release_packet( packet_cache *pcache, jack_nframes_t framecnt );
- int packet_cache_get_next_available_framecnt( packet_cache *pcache, jack_nframes_t expected_framecnt, jack_nframes_t *framecnt );
- int packet_cache_get_highest_available_framecnt( packet_cache *pcache, jack_nframes_t *framecnt );
- int packet_cache_find_latency( packet_cache *pcache, jack_nframes_t expected_framecnt, jack_nframes_t *framecnt );
-
- // Function Prototypes
-
- int netjack_poll_deadline (int sockfd, jack_time_t deadline);
- void netjack_sendto(int sockfd, char *packet_buf, int pkt_size, int flags, struct sockaddr *addr, int addr_size, int mtu);
- int get_sample_size(int bitdepth);
- void packet_header_hton(jacknet_packet_header *pkthdr);
- void packet_header_ntoh(jacknet_packet_header *pkthdr);
- void render_payload_to_jack_ports(int bitdepth, void *packet_payload, jack_nframes_t net_period_down, JSList *capture_ports, JSList *capture_srcs, jack_nframes_t nframes, int dont_htonl_floats );
- void render_jack_ports_to_payload(int bitdepth, JSList *playback_ports, JSList *playback_srcs, jack_nframes_t nframes, void *packet_payload, jack_nframes_t net_period_up, int dont_htonl_floats );
-
- // XXX: This is sort of deprecated:
- // This one waits forever. an is not using ppoll
- int netjack_poll(int sockfd, int timeout);
-
- void decode_midi_buffer (uint32_t *buffer_uint32, unsigned int buffer_size_uint32, jack_default_audio_sample_t* buf);
- void encode_midi_buffer (uint32_t *buffer_uint32, unsigned int buffer_size_uint32, jack_default_audio_sample_t* buf);
-
- #ifdef __cplusplus
- }
- #endif
- #endif
-
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