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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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39
spa/include/spa/ringbuffer.h
View file

@ -29,6 +29,8 @@ typedef struct _SpaRingbuffer SpaRingbuffer;
#define SPA_RINGBUFFER_URI "http://spaplug.in/ns/ringbuffer"
#define SPA_RINGBUFFER_PREFIX SPA_RINGBUFFER_URI "#"
#include <string.h>
#include <spa/defs.h>
#include <spa/barrier.h>
@ -115,7 +117,7 @@ spa_ringbuffer_get_read_offset (SpaRingbuffer *rbuf,
* Fill @areas with pointers to read from. The total amount of
* bytes that can be read can be obtained by summing the areas len fields.
*/
static inline void
static inline size_t
spa_ringbuffer_get_read_areas (SpaRingbuffer *rbuf,
SpaRingbufferArea areas[2])
{
@ -134,6 +136,22 @@ spa_ringbuffer_get_read_areas (SpaRingbuffer *rbuf,
areas[0].len = avail;
areas[1].len = 0;
}
return avail;
}
static inline void
spa_ringbuffer_read_data (SpaRingbuffer *rbuf,
void *buffer,
SpaRingbufferArea areas[2],
void *data,
size_t size)
{
if (SPA_LIKELY (size < areas[0].len))
memcpy (data, buffer + areas[0].offset, size);
else {
memcpy (data, buffer + areas[0].offset, areas[0].len);
memcpy (data + areas[0].len, buffer, size - areas[0].len);
}
}
/**
@ -173,7 +191,7 @@ spa_ringbuffer_get_write_offset (SpaRingbuffer *rbuf,
* Fill @areas with pointers to write to. The total amount of
* bytes that can be written can be obtained by summing the areas len fields.
*/
static inline void
static inline size_t
spa_ringbuffer_get_write_areas (SpaRingbuffer *rbuf,
SpaRingbufferArea areas[2])
{
@ -192,6 +210,22 @@ spa_ringbuffer_get_write_areas (SpaRingbuffer *rbuf,
areas[0].len = avail;
areas[1].len = 0;
}
return avail;
}
static inline void
spa_ringbuffer_write_data (SpaRingbuffer *rbuf,
void *buffer,
SpaRingbufferArea areas[2],
void *data,
size_t size)
{
if (SPA_LIKELY (size < areas[0].len))
memcpy (buffer + areas[0].offset, data, size);
else {
memcpy (buffer + areas[0].offset, data, areas[0].len);
memcpy (buffer, data + areas[0].len, size - areas[0].len);
}
}
/**
@ -210,6 +244,7 @@ spa_ringbuffer_write_advance (SpaRingbuffer *rbuf,
rbuf->writeindex = (rbuf->writeindex + len) & rbuf->mask2;
}
#ifdef __cplusplus
} /* extern "C" */
#endif