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pipewire/pinos/client/ringbuffer.c
Wim Taymans 1ba10cf848 Remove some events 
Remove port added and port removed, we can get that info by inspecting
the port ids.
Remove data from ringbuffer, we just need the ringbuffer to keep track
of the read and write positions.
Handle async-complete in the main thread
Work on async node initialization
Work on using a queue as the link between nodes
Make the daemon link things based on the node states
Use queue helper in v4l2
2016-09-23 17:08:20 +02:00

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/* Pinos
* Copyright (C) 2015 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.
*/
#define _GNU_SOURCE
#include <unistd.h>
#include <fcntl.h>
#include <stdlib.h>
#include <sys/eventfd.h>
#include <sys/mman.h>
#include <gio/gio.h>
#include <glib-object.h>
#include <pinos/client/enumtypes.h>
#include <pinos/client/ringbuffer.h>
#include <spa/include/spa/ringbuffer.h>
#include <spa/lib/ringbuffer.c>
#define PINOS_RINGBUFFER_GET_PRIVATE(rb) \
(G_TYPE_INSTANCE_GET_PRIVATE ((rb), PINOS_TYPE_RINGBUFFER, PinosRingbufferPrivate))
typedef struct {
SpaRingbuffer rbuf;
/* ringbuffer starts here */
} PinosRingbufferData;
struct _PinosRingbufferPrivate
{
PinosRingbufferMode mode;
guint size;
guint fdsize;
int fd;
int semaphore;
PinosRingbufferData *data;
};
G_DEFINE_TYPE (PinosRingbuffer, pinos_ringbuffer, G_TYPE_OBJECT);
enum
{
PROP_0,
PROP_MODE,
PROP_SIZE,
PROP_FD,
PROP_FDSIZE,
PROP_SEMAPHORE,
};
enum
{
SIGNAL_NONE,
LAST_SIGNAL
};
static void
pinos_ringbuffer_get_property (GObject *_object,
guint prop_id,
GValue *value,
GParamSpec *pspec)
{
PinosRingbuffer *rb = PINOS_RINGBUFFER (_object);
PinosRingbufferPrivate *priv = rb->priv;
switch (prop_id) {
case PROP_MODE:
g_value_set_enum (value, priv->mode);
break;
case PROP_SIZE:
g_value_set_uint (value, priv->size);
break;
case PROP_FD:
g_value_set_int (value, priv->fd);
break;
case PROP_FDSIZE:
g_value_set_uint (value, priv->fdsize);
break;
case PROP_SEMAPHORE:
g_value_set_int (value, priv->semaphore);
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (rb, prop_id, pspec);
break;
}
}
static void
pinos_ringbuffer_set_property (GObject *_object,
guint prop_id,
const GValue *value,
GParamSpec *pspec)
{
PinosRingbuffer *rb = PINOS_RINGBUFFER (_object);
PinosRingbufferPrivate *priv = rb->priv;
switch (prop_id) {
case PROP_MODE:
priv->mode = g_value_get_enum (value);
break;
case PROP_SIZE:
priv->size = g_value_get_uint (value);
break;
case PROP_FD:
priv->fd = g_value_get_int (value);
break;
case PROP_FDSIZE:
priv->fdsize = g_value_get_uint (value);
break;
case PROP_SEMAPHORE:
priv->semaphore = g_value_get_int (value);
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (rb, prop_id, pspec);
break;
}
}
static int
tmpfile_create (gsize size)
{
char filename[] = "/dev/shm/tmpfilepay.XXXXXX";
int fd, result;
fd = mkostemp (filename, O_CLOEXEC);
if (fd == -1)
return -1;
unlink (filename);
result = ftruncate (fd, size);
if (result == -1) {
close (fd);
return -1;
}
return fd;
}
static void
pinos_ringbuffer_constructed (GObject * obj)
{
PinosRingbuffer *rb = PINOS_RINGBUFFER (obj);
PinosRingbufferPrivate *priv = rb->priv;
g_debug ("ringbuffer %p: constructed", rb);
if (priv->fd == -1) {
priv->fdsize = priv->size + sizeof (PinosRingbufferData);
priv->fd = tmpfile_create (priv->fdsize);
priv->semaphore = eventfd (0, EFD_CLOEXEC);
}
priv->data = mmap (NULL, priv->fdsize, PROT_READ | PROT_WRITE, MAP_SHARED, priv->fd, 0);
spa_ringbuffer_init (&priv->data->rbuf, priv->size);
G_OBJECT_CLASS (pinos_ringbuffer_parent_class)->constructed (obj);
}
static void
pinos_ringbuffer_dispose (GObject * obj)
{
PinosRingbuffer *rb = PINOS_RINGBUFFER (obj);
g_debug ("ringbuffer %p: dispose", rb);
G_OBJECT_CLASS (pinos_ringbuffer_parent_class)->dispose (obj);
}
static void
pinos_ringbuffer_finalize (GObject * obj)
{
PinosRingbuffer *rb = PINOS_RINGBUFFER (obj);
g_debug ("ringbuffer %p: finalize", rb);
G_OBJECT_CLASS (pinos_ringbuffer_parent_class)->finalize (obj);
}
static void
pinos_ringbuffer_class_init (PinosRingbufferClass * klass)
{
GObjectClass *gobject_class = G_OBJECT_CLASS (klass);
g_type_class_add_private (klass, sizeof (PinosRingbufferPrivate));
gobject_class->constructed = pinos_ringbuffer_constructed;
gobject_class->dispose = pinos_ringbuffer_dispose;
gobject_class->finalize = pinos_ringbuffer_finalize;
gobject_class->set_property = pinos_ringbuffer_set_property;
gobject_class->get_property = pinos_ringbuffer_get_property;
g_object_class_install_property (gobject_class,
PROP_MODE,
g_param_spec_enum ("mode",
"Mode",
"The mode of the ringbuffer",
PINOS_TYPE_RINGBUFFER_MODE,
PINOS_RINGBUFFER_MODE_READ,
G_PARAM_READWRITE |
G_PARAM_CONSTRUCT_ONLY |
G_PARAM_STATIC_STRINGS));
g_object_class_install_property (gobject_class,
PROP_SIZE,
g_param_spec_uint ("size",
"Size",
"The size of the ringbuffer",
1,
G_MAXUINT,
64 * 1024,
G_PARAM_READWRITE |
G_PARAM_CONSTRUCT_ONLY |
G_PARAM_STATIC_STRINGS));
g_object_class_install_property (gobject_class,
PROP_FD,
g_param_spec_int ("fd",
"Fd",
"The file descriptor with memory",
-1,
G_MAXINT,
-1,
G_PARAM_READWRITE |
G_PARAM_CONSTRUCT_ONLY |
G_PARAM_STATIC_STRINGS));
g_object_class_install_property (gobject_class,
PROP_FDSIZE,
g_param_spec_uint ("fdsize",
"Fd Size",
"Size of the memory",
1,
G_MAXUINT,
-1,
G_PARAM_READWRITE |
G_PARAM_CONSTRUCT_ONLY |
G_PARAM_STATIC_STRINGS));
g_object_class_install_property (gobject_class,
PROP_SEMAPHORE,
g_param_spec_int ("semaphore",
"Semaphore",
"Semaphore file desciptor",
-1,
G_MAXINT,
-1,
G_PARAM_READWRITE |
G_PARAM_CONSTRUCT_ONLY |
G_PARAM_STATIC_STRINGS));
}
static void
pinos_ringbuffer_init (PinosRingbuffer * rb)
{
PinosRingbufferPrivate *priv = rb->priv = PINOS_RINGBUFFER_GET_PRIVATE (rb);
g_debug ("ringbuffer %p: new %u", rb, priv->size);
priv->mode = PINOS_RINGBUFFER_MODE_READ;
priv->size = 0;
priv->fd = -1;
}
PinosRingbuffer *
pinos_ringbuffer_new (PinosRingbufferMode mode,
gsize size)
{
PinosRingbuffer *rb;
g_return_val_if_fail (size > 0, NULL);
rb = g_object_new (PINOS_TYPE_RINGBUFFER,
"size", size,
"mode", mode,
NULL);
return rb;
}
PinosRingbuffer *
pinos_ringbuffer_new_import (PinosRingbufferMode mode,
guint fdsize,
int fd,
int semaphore)
{
PinosRingbuffer *rb;
g_return_val_if_fail (fdsize > 0, NULL);
g_return_val_if_fail (fd >= 0, NULL);
rb = g_object_new (PINOS_TYPE_RINGBUFFER,
"mode", mode,
"fd", fd,
"fdsize", fdsize,
"semaphore", semaphore,
NULL);
return rb;
}
gboolean
pinos_ringbuffer_get_read_areas (PinosRingbuffer *rbuf,
PinosRingbufferArea areas[2])
{
PinosRingbufferPrivate *priv;
g_return_val_if_fail (PINOS_IS_RINGBUFFER (rbuf), FALSE);
priv = rbuf->priv;
spa_ringbuffer_get_read_areas (&priv->data->rbuf, (SpaRingbufferArea *)areas);
return TRUE;
}
gboolean
pinos_ringbuffer_get_write_areas (PinosRingbuffer *rbuf,
PinosRingbufferArea areas[2])
{
PinosRingbufferPrivate *priv;
g_return_val_if_fail (PINOS_IS_RINGBUFFER (rbuf), FALSE);
priv = rbuf->priv;
spa_ringbuffer_get_write_areas (&priv->data->rbuf, (SpaRingbufferArea *)areas);
return TRUE;
}
gboolean
pinos_ringbuffer_read_advance (PinosRingbuffer *rbuf,
gssize len)
{
PinosRingbufferPrivate *priv;
guint64 val;
g_return_val_if_fail (PINOS_IS_RINGBUFFER (rbuf), FALSE);
priv = rbuf->priv;
spa_ringbuffer_read_advance (&priv->data->rbuf, len);
if (priv->mode == PINOS_RINGBUFFER_MODE_READ) {
val = 1;
if (write (priv->semaphore, &val, 8) != 8)
g_warning ("error writing semaphore");
}
return TRUE;
}
gboolean
pinos_ringbuffer_write_advance (PinosRingbuffer *rbuf,
gssize len)
{
PinosRingbufferPrivate *priv;
guint64 val;
g_return_val_if_fail (PINOS_IS_RINGBUFFER (rbuf), FALSE);
priv = rbuf->priv;
spa_ringbuffer_write_advance (&priv->data->rbuf, len);
if (priv->mode == PINOS_RINGBUFFER_MODE_WRITE) {
val = 1;
if (write (priv->semaphore, &val, 8) != 8)
g_warning ("error writing semaphore");
}
return TRUE;
}
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