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raop: Packet retransmission support for UDP

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This patch adds an RTP audio packet retransmission support and a
circular buffer implementation for it.

This patch was originally written by Matthias Wabersich [1] and
later debugged and integrated into the latest tree by Hajime Fujita

[1]: https://bugs.freedesktop.org/show_bug.cgi?id=42804#c44
This commit is contained in:
Matthias Wabersich 2016-11-06 12:54:00 -06:00 • committed by Tanu Kaskinen
parent 402bb7ce48
commit 29385da239
5 changed files with 316 additions and 12 deletions
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42
src/modules/raop/raop_packet_buffer.h Normal file
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#ifndef RAOP_PACKET_BUFFER_H_INCLUDED
#define RAOP_PACKET_BUFFER_H_INCLUDED
/***
Circular buffer for RTP audio packets with random access support
by RTP sequence number.
Copyright 2013 Matthias Wabersich, Hajime Fujita
This is free software; you can redistribute it and/or modify
it under the terms of the GNU Lesser General Public License as published
by the Free Software Foundation; either version 2.1 of the License,
or (at your option) any later version.
This 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 Lesser General Public License
along with PulseAudio; if not, write to the Free Software
Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
USA.
***/
struct pa_raop_packet_element;
typedef struct pa_raop_packet_element pa_raop_packet_element;
struct pa_raop_packet_buffer;
typedef struct pa_raop_packet_buffer pa_raop_packet_buffer;
/* Allocates a new circular packet buffer
size: Maximum number of packets to store */
pa_raop_packet_buffer *pa_raop_pb_new(size_t size);
void pa_raop_pb_clear(pa_raop_packet_buffer *pb);
void pa_raop_pb_delete(pa_raop_packet_buffer *pb);
void pa_raop_pb_write_packet(pa_raop_packet_buffer *pb, uint16_t seq_num, const uint8_t *packet_data, ssize_t packet_length);
ssize_t pa_raop_pb_read_packet(pa_raop_packet_buffer *pb, uint16_t seq_num, uint8_t **packet_data);
#endif /* RAOP_PACKET_BUFFER_H_INCLUDED */