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pipewire/pinos/client/ringbuffer.c
Wim Taymans ca7d08c406 Work on sink 
Remove _remove from properties, we can do the same with set of a NULL
value.
Add signals to the stream API to manage the buffers. Wrap those buffers
in a GstBuffer in the pinossrc and pinossink elements and pool them in a
bufferpool.
Remove SPA_EVENT_TYPE_PULL_INPUT, we can do the same with NEED_INPUT and
by using a ringbuffer.
Do more complete allocation of buffers in the link. Use the buffer
allocator if none of the nodes can allocate.
Follow the node state to trigger negotiation and allocation.
Remove offset and size when refering to buffers, we want to always deal
with the complete buffer and use a ringbuffer for ranges or change the
offset/size in the buffer data when needed.
Serialize port_info structures as part of the port_update
Print both the enum number and the name when debuging properties or
formats.
2016-08-24 16:38:51 +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, (guint8 *)priv->data + sizeof (PinosRingbufferData), 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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