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Rework transport protocol

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Use a more simple tranport protocol for the realtime data. Use a piece
of shared memory and a socket where we use a 1byte read/write to trigger
remote actions. Also use a ringbuffer for events.
This commit is contained in:
Wim Taymans 2016-11-07 10:24:13 +01:00
parent 7e46f9e3ad
commit b774b99db5
22 changed files with 797 additions and 364 deletions
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115
pinos/client/transport.h Normal file
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/* Simple Plugin API
* Copyright (C) 2016 Wim Taymans <wim.taymans@gmail.com>
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Library General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library 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
* Library General Public License for more details.
*
* You should have received a copy of the GNU Library General Public
* License along with this library; if not, write to the
* Free Software Foundation, Inc., 51 Franklin St, Fifth Floor,
* Boston, MA 02110-1301, USA.
*/
#ifndef __PINOS_TRANSPORT_H__
#define __PINOS_TRANSPORT_H__
#ifdef __cplusplus
extern "C" {
#endif
typedef struct _PinosTransport PinosTransport;
typedef struct _PinosTransportArea PinosTransportArea;
#include <string.h>
#include <spa/defs.h>
#include <spa/port.h>
#include <spa/node.h>
#include <pinos/client/connection.h>
#include <pinos/client/mem.h>
#define PINOS_TRANSPORT_CMD_NONE 0
#define PINOS_TRANSPORT_CMD_NEED_DATA (1<<0)
#define PINOS_TRANSPORT_CMD_HAVE_DATA (1<<1)
#define PINOS_TRANSPORT_CMD_HAVE_EVENT (1<<2)
#define PINOS_TRANSPORT_CMD_SYNC (1<<3)
typedef struct {
int memfd;
off_t offset;
size_t size;
int fd;
} PinosTransportInfo;
struct _PinosTransportArea {
unsigned int max_input_info;
unsigned int n_input_info;
unsigned int max_output_info;
unsigned int n_output_info;
};
struct _PinosTransport {
PinosTransportArea *area;
SpaPortInputInfo *input_info;
SpaPortOutputInfo *output_info;
void *input_data;
SpaRingbuffer *input_buffer;
void *output_data;
SpaRingbuffer *output_buffer;
int fd;
};
PinosTransport * pinos_transport_new (unsigned int max_input_info,
unsigned int max_output_info,
int fd);
PinosTransport * pinos_transport_new_from_info (PinosTransportInfo *info);
void pinos_transport_free (PinosTransport *trans);
SpaResult pinos_transport_get_info (PinosTransport *trans,
PinosTransportInfo *info);
SpaResult pinos_transport_add_event (PinosTransport *trans,
SpaNodeEvent *event);
SpaResult pinos_transport_next_event (PinosTransport *trans,
SpaNodeEvent *event);
SpaResult pinos_transport_parse_event (PinosTransport *trans,
void *event);
static inline void
pinos_transport_write_cmd (PinosTransport *trans,
uint8_t cmd)
{
write (trans->fd, &cmd, 1);
}
static inline void
pinos_transport_read_cmd (PinosTransport *trans,
uint8_t *cmd)
{
read (trans->fd, cmd, 1);
}
static inline void
pinos_transport_sync_cmd (PinosTransport *trans,
uint8_t out_cmd,
uint8_t *in_cmd)
{
write (trans->fd, &out_cmd, 1);
read (trans->fd, in_cmd, 1);
}
#ifdef __cplusplus
} /* extern "C" */
#endif
#endif /* __PINOS_TRANSPORT_H__ */