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pipewire/pinos/client/stream.c
Wim Taymans af3de36416 work on stream negotiation and start 
Add more buffer types to add and remove memory shared memory between the
server and client. We would like to send buffers only once and then
simply reference them by index.
Do format negotiation and stream start with a START message.
2016-07-21 18:38:24 +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.
*/
#include <sys/socket.h>
#include <string.h>
#include <gio/gio.h>
#include <gio/gunixfdlist.h>
#include <gio/gunixfdmessage.h>
#include "pinos/server/daemon.h"
#include "pinos/client/pinos.h"
#include "pinos/client/context.h"
#include "pinos/client/stream.h"
#include "pinos/client/enumtypes.h"
#include "pinos/client/private.h"
#define MAX_BUFFER_SIZE 1024
#define MAX_FDS 16
struct _PinosStreamPrivate
{
PinosContext *context;
gchar *name;
PinosProperties *properties;
guint id;
PinosStreamState state;
GError *error;
PinosDirection direction;
gchar *path;
GBytes *possible_formats;
PinosStreamFlags flags;
GBytes *format;
GDBusProxy *channel;
gboolean disconnecting;
PinosStreamMode mode;
GSocket *socket;
GSource *socket_source;
int fd;
PinosBuffer *buffer;
PinosBuffer recv_buffer;
guint8 recv_data[MAX_BUFFER_SIZE];
int recv_fds[MAX_FDS];
guint8 send_data[MAX_BUFFER_SIZE];
int send_fds[MAX_FDS];
GHashTable *mem_ids;
};
#define PINOS_STREAM_GET_PRIVATE(obj) \
(G_TYPE_INSTANCE_GET_PRIVATE ((obj), PINOS_TYPE_STREAM, PinosStreamPrivate))
G_DEFINE_TYPE (PinosStream, pinos_stream, G_TYPE_OBJECT);
enum
{
PROP_0,
PROP_CONTEXT,
PROP_NAME,
PROP_PROPERTIES,
PROP_STATE,
PROP_POSSIBLE_FORMATS,
PROP_FORMAT,
};
enum
{
SIGNAL_NEW_BUFFER,
LAST_SIGNAL
};
static guint signals[LAST_SIGNAL] = { 0 };
static void unhandle_socket (PinosStream *stream);
static void
pinos_stream_get_property (GObject *_object,
guint prop_id,
GValue *value,
GParamSpec *pspec)
{
PinosStream *stream = PINOS_STREAM (_object);
PinosStreamPrivate *priv = stream->priv;
switch (prop_id) {
case PROP_CONTEXT:
g_value_set_object (value, priv->context);
break;
case PROP_NAME:
g_value_set_string (value, priv->name);
break;
case PROP_PROPERTIES:
g_value_set_boxed (value, priv->properties);
break;
case PROP_STATE:
g_value_set_enum (value, priv->state);
break;
case PROP_POSSIBLE_FORMATS:
g_value_set_boxed (value, priv->possible_formats);
break;
case PROP_FORMAT:
g_value_set_boxed (value, priv->format);
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (stream, prop_id, pspec);
break;
}
}
static void
pinos_stream_set_property (GObject *_object,
guint prop_id,
const GValue *value,
GParamSpec *pspec)
{
PinosStream *stream = PINOS_STREAM (_object);
PinosStreamPrivate *priv = stream->priv;
switch (prop_id) {
case PROP_CONTEXT:
priv->context = g_value_dup_object (value);
break;
case PROP_NAME:
priv->name = g_value_dup_string (value);
break;
case PROP_PROPERTIES:
if (priv->properties)
pinos_properties_free (priv->properties);
priv->properties = g_value_dup_boxed (value);
break;
case PROP_FORMAT:
if (priv->format)
g_bytes_unref (priv->format);
priv->format = g_value_dup_boxed (value);
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (stream, prop_id, pspec);
break;
}
}
static gboolean
do_notify_state (PinosStream *stream)
{
g_object_notify (G_OBJECT (stream), "state");
g_object_unref (stream);
return FALSE;
}
static void
stream_set_state (PinosStream *stream,
PinosStreamState state,
GError *error)
{
if (stream->priv->state != state) {
if (error) {
g_clear_error (&stream->priv->error);
stream->priv->error = error;
}
stream->priv->state = state;
g_main_context_invoke (stream->priv->context->priv->context,
(GSourceFunc) do_notify_state,
g_object_ref (stream));
} else {
if (error)
g_error_free (error);
}
}
static void
subscription_cb (PinosSubscribe *subscribe,
PinosSubscriptionEvent event,
PinosSubscriptionFlags flags,
GDBusProxy *object,
gpointer user_data)
{
PinosStream *stream = PINOS_STREAM (user_data);
PinosStreamPrivate *priv = stream->priv;
switch (flags) {
case PINOS_SUBSCRIPTION_FLAG_CHANNEL:
if (event == PINOS_SUBSCRIPTION_EVENT_REMOVE) {
if (object == priv->channel && !priv->disconnecting) {
stream_set_state (stream,
PINOS_STREAM_STATE_ERROR,
g_error_new_literal (G_IO_ERROR,
G_IO_ERROR_CLOSED,
"Channel disappeared"));
}
}
break;
default:
break;
}
}
static void
pinos_stream_constructed (GObject * object)
{
PinosStream *stream = PINOS_STREAM (object);
PinosStreamPrivate *priv = stream->priv;
priv->id = g_signal_connect (priv->context->priv->subscribe,
"subscription-event",
(GCallback) subscription_cb,
stream);
G_OBJECT_CLASS (pinos_stream_parent_class)->constructed (object);
}
static void
pinos_stream_finalize (GObject * object)
{
PinosStream *stream = PINOS_STREAM (object);
PinosStreamPrivate *priv = stream->priv;
g_debug ("free stream %p", stream);
g_clear_object (&priv->channel);
if (priv->possible_formats)
g_bytes_unref (priv->possible_formats);
if (priv->format)
g_bytes_unref (priv->format);
g_free (priv->path);
if (priv->possible_formats)
g_bytes_unref (priv->possible_formats);
g_clear_error (&priv->error);
if (priv->properties)
pinos_properties_free (priv->properties);
g_signal_handler_disconnect (priv->context->priv->subscribe, priv->id);
g_clear_object (&priv->context);
g_free (priv->name);
G_OBJECT_CLASS (pinos_stream_parent_class)->finalize (object);
}
static void
pinos_stream_class_init (PinosStreamClass * klass)
{
GObjectClass *gobject_class = G_OBJECT_CLASS (klass);
g_type_class_add_private (klass, sizeof (PinosStreamPrivate));
gobject_class->constructed = pinos_stream_constructed;
gobject_class->finalize = pinos_stream_finalize;
gobject_class->set_property = pinos_stream_set_property;
gobject_class->get_property = pinos_stream_get_property;
/**
* PinosStream:context
*
* The context of the stream.
*/
g_object_class_install_property (gobject_class,
PROP_CONTEXT,
g_param_spec_object ("context",
"Context",
"The context",
PINOS_TYPE_CONTEXT,
G_PARAM_READWRITE |
G_PARAM_CONSTRUCT_ONLY |
G_PARAM_STATIC_STRINGS));
/**
* PinosStream:name
*
* The name of the stream as specified at construction time.
*/
g_object_class_install_property (gobject_class,
PROP_NAME,
g_param_spec_string ("name",
"Name",
"The name of the stream",
NULL,
G_PARAM_READWRITE |
G_PARAM_CONSTRUCT_ONLY |
G_PARAM_STATIC_STRINGS));
/**
* PinosStream:properties
*
* The properties of the stream as specified at construction time.
*/
g_object_class_install_property (gobject_class,
PROP_PROPERTIES,
g_param_spec_boxed ("properties",
"Properties",
"The properties of the stream",
PINOS_TYPE_PROPERTIES,
G_PARAM_READWRITE |
G_PARAM_CONSTRUCT_ONLY |
G_PARAM_STATIC_STRINGS));
/**
* PinosStream:state
*
* The state of the stream. Use the notify::state signal to be notified
* of state changes.
*/
g_object_class_install_property (gobject_class,
PROP_STATE,
g_param_spec_enum ("state",
"State",
"The stream state",
PINOS_TYPE_STREAM_STATE,
PINOS_STREAM_STATE_UNCONNECTED,
G_PARAM_READABLE |
G_PARAM_STATIC_STRINGS));
/**
* PinosStream:possible-formats
*
* The possible formats for the stream. this can only be used after connecting
* the stream for capture or provide.
*/
g_object_class_install_property (gobject_class,
PROP_POSSIBLE_FORMATS,
g_param_spec_boxed ("possible-formats",
"Possible Formats",
"The possbile formats of the stream",
G_TYPE_BYTES,
G_PARAM_READABLE |
G_PARAM_STATIC_STRINGS));
/**
* PinosStream:formats
*
* The format of the stream. This will be set after starting the stream.
*/
g_object_class_install_property (gobject_class,
PROP_FORMAT,
g_param_spec_boxed ("format",
"Format",
"The format of the stream",
G_TYPE_BYTES,
G_PARAM_READWRITE |
G_PARAM_STATIC_STRINGS));
/**
* PinosStream:new-buffer
*
* When doing pinos_stream_start() with #PINOS_STREAM_MODE_BUFFER, this signal
* will be fired whenever a new buffer can be obtained with
* pinos_stream_capture_buffer().
*/
signals[SIGNAL_NEW_BUFFER] = g_signal_new ("new-buffer",
G_TYPE_FROM_CLASS (klass),
G_SIGNAL_RUN_LAST,
0,
NULL,
NULL,
g_cclosure_marshal_generic,
G_TYPE_NONE,
0,
G_TYPE_NONE);
}
static void
pinos_stream_init (PinosStream * stream)
{
PinosStreamPrivate *priv = stream->priv = PINOS_STREAM_GET_PRIVATE (stream);
g_debug ("new stream %p", stream);
priv->state = PINOS_STREAM_STATE_UNCONNECTED;
}
/**
* pinos_stream_state_as_string:
* @state: a #PinosStreamState
*
* Return the string representation of @state.
*
* Returns: the string representation of @state.
*/
const gchar *
pinos_stream_state_as_string (PinosStreamState state)
{
GEnumValue *val;
val = g_enum_get_value (G_ENUM_CLASS (g_type_class_ref (PINOS_TYPE_STREAM_STATE)),
state);
return val == NULL ? "invalid-state" : val->value_nick;
}
/**
* pinos_stream_new:
* @context: a #PinosContext
* @name: a stream name
* @properties: (transfer full): stream properties
*
* Make a new unconnected #PinosStream
*
* Returns: a new unconnected #PinosStream
*/
PinosStream *
pinos_stream_new (PinosContext *context,
const gchar *name,
PinosProperties *props)
{
PinosStream *stream;
g_return_val_if_fail (PINOS_IS_CONTEXT (context), NULL);
g_return_val_if_fail (name != NULL, NULL);
if (props == NULL) {
props = pinos_properties_new ("media.name", name, NULL);
} else if (!pinos_properties_get (props, "media.name")) {
pinos_properties_set (props, "media.name", name);
}
stream = g_object_new (PINOS_TYPE_STREAM,
"context", context,
"name", name,
"properties", props,
NULL);
pinos_properties_free (props);
return stream;
}
/**
* pinos_stream_get_state:
* @stream: a #PinosStream
*
* Get the state of @stream.
*
* Returns: the state of @stream
*/
PinosStreamState
pinos_stream_get_state (PinosStream *stream)
{
g_return_val_if_fail (PINOS_IS_STREAM (stream), PINOS_STREAM_STATE_ERROR);
return stream->priv->state;
}
/**
* pinos_stream_get_error:
* @stream: a #PinosStream
*
* Get the error of @stream.
*
* Returns: the error of @stream or %NULL when there is no error
*/
const GError *
pinos_stream_get_error (PinosStream *stream)
{
g_return_val_if_fail (PINOS_IS_STREAM (stream), NULL);
return stream->priv->error;
}
static void
on_channel_proxy (GObject *source_object,
GAsyncResult *res,
gpointer user_data)
{
PinosStream *stream = user_data;
PinosStreamPrivate *priv = stream->priv;
PinosContext *context = priv->context;
GVariant *v;
gchar *str;
GError *error = NULL;
priv->channel = pinos_subscribe_get_proxy_finish (context->priv->subscribe,
res,
&error);
if (priv->channel == NULL)
goto channel_failed;
/* get the port we are connected to */
v = g_dbus_proxy_get_cached_property (priv->channel, "Port");
if (v) {
gsize len;
str = g_variant_dup_string (v, &len);
g_variant_unref (v);
g_free (priv->path);
priv->path = str;
}
v = g_dbus_proxy_get_cached_property (priv->channel, "PossibleFormats");
if (v) {
gsize len;
str = g_variant_dup_string (v, &len);
g_variant_unref (v);
if (priv->possible_formats)
g_bytes_unref (priv->possible_formats);
priv->possible_formats = g_bytes_new_take (str, len + 1);
g_object_notify (G_OBJECT (stream), "possible-formats");
}
v = g_dbus_proxy_get_cached_property (priv->channel, "Properties");
if (v) {
if (priv->properties)
pinos_properties_free (priv->properties);
priv->properties = pinos_properties_from_variant (v);
g_variant_unref (v);
g_object_notify (G_OBJECT (stream), "properties");
}
stream_set_state (stream, PINOS_STREAM_STATE_READY, NULL);
g_object_unref (stream);
return;
channel_failed:
{
g_warning ("failed to get channel proxy: %s", error->message);
stream_set_state (stream, PINOS_STREAM_STATE_ERROR, error);
g_object_unref (stream);
return;
}
}
static gboolean
parse_buffer (PinosStream *stream,
PinosBuffer *pbuf)
{
PinosBufferIter it;
PinosStreamPrivate *priv = stream->priv;
pinos_buffer_iter_init (&it, pbuf);
while (pinos_buffer_iter_next (&it)) {
PinosPacketType type = pinos_buffer_iter_get_type (&it);
switch (type) {
case PINOS_PACKET_TYPE_ADD_MEM:
{
PinosPacketAddMem p;
int fd;
if (!pinos_buffer_iter_parse_add_mem (&it, &p))
break;
fd = pinos_buffer_get_fd (pbuf, p.fd_index);
if (fd == -1)
break;
// g_hash_table_insert (priv->mem_ids, GINT_TO_POINTER (p.id), NULL);
break;
}
case PINOS_PACKET_TYPE_REMOVE_MEM:
{
PinosPacketRemoveMem p;
if (!pinos_buffer_iter_parse_remove_mem (&it, &p))
break;
// g_hash_table_remove (priv->mem_ids, GINT_TO_POINTER (p.id));
break;
}
case PINOS_PACKET_TYPE_FORMAT_CHANGE:
{
PinosPacketFormatChange p;
if (!pinos_buffer_iter_parse_format_change (&it, &p))
break;
if (priv->format)
g_bytes_unref (priv->format);
priv->format = g_bytes_new (p.format, strlen (p.format) + 1);
g_object_notify (G_OBJECT (stream), "format");
break;
}
case PINOS_PACKET_TYPE_STREAMING:
{
stream_set_state (stream, PINOS_STREAM_STATE_STREAMING, NULL);
break;
}
case PINOS_PACKET_TYPE_STOPPED:
{
unhandle_socket (stream);
g_clear_pointer (&priv->format, g_bytes_unref);
g_object_notify (G_OBJECT (stream), "format");
stream_set_state (stream, PINOS_STREAM_STATE_READY, NULL);
break;
}
case PINOS_PACKET_TYPE_HEADER:
{
break;
}
case PINOS_PACKET_TYPE_PROCESS_MEM:
{
break;
}
default:
g_warning ("unhandled packet %d", type);
break;
}
}
pinos_buffer_iter_end (&it);
return TRUE;
}
static gboolean
on_socket_condition (GSocket *socket,
GIOCondition condition,
gpointer user_data)
{
PinosStream *stream = user_data;
PinosStreamPrivate *priv = stream->priv;
switch (condition) {
case G_IO_IN:
{
PinosBuffer *buffer = &priv->recv_buffer;
GError *error = NULL;
if (!pinos_io_read_buffer (priv->fd,
buffer,
priv->recv_data,
MAX_BUFFER_SIZE,
priv->recv_fds,
MAX_FDS,
&error)) {
g_warning ("stream %p: failed to read buffer: %s", stream, error->message);
g_clear_error (&error);
return TRUE;
}
parse_buffer (stream, buffer);
priv->buffer = buffer;
g_signal_emit (stream, signals[SIGNAL_NEW_BUFFER], 0, NULL);
priv->buffer = NULL;
g_assert (pinos_buffer_unref (buffer) == FALSE);
break;
}
case G_IO_OUT:
g_warning ("can do IO\n");
break;
default:
break;
}
return TRUE;
}
static void
handle_socket (PinosStream *stream, gint fd)
{
PinosStreamPrivate *priv = stream->priv;
GError *error = NULL;
priv->socket = g_socket_new_from_fd (fd, &error);
if (priv->socket == NULL)
goto socket_failed;
switch (priv->mode) {
case PINOS_STREAM_MODE_SOCKET:
g_object_notify (G_OBJECT (stream), "socket");
break;
case PINOS_STREAM_MODE_BUFFER:
{
priv->fd = g_socket_get_fd (priv->socket);
priv->socket_source = g_socket_create_source (priv->socket, G_IO_IN, NULL);
g_source_set_callback (priv->socket_source, (GSourceFunc) on_socket_condition, stream, NULL);
g_source_attach (priv->socket_source, priv->context->priv->context);
break;
}
default:
break;
}
return;
/* ERRORS */
socket_failed:
{
g_warning ("failed to create socket: %s", error->message);
stream_set_state (stream, PINOS_STREAM_STATE_ERROR, error);
return;
}
}
static void
unhandle_socket (PinosStream *stream)
{
PinosStreamPrivate *priv = stream->priv;
switch (priv->mode) {
case PINOS_STREAM_MODE_SOCKET:
g_clear_object (&priv->socket);
g_object_notify (G_OBJECT (stream), "socket");
break;
case PINOS_STREAM_MODE_BUFFER:
if (priv->socket_source) {
g_source_destroy (priv->socket_source);
g_clear_pointer (&priv->socket_source, g_source_unref);
}
break;
default:
break;
}
}
static void
on_channel_created (GObject *source_object,
GAsyncResult *res,
gpointer user_data)
{
PinosStream *stream = user_data;
PinosStreamPrivate *priv = stream->priv;
PinosContext *context = priv->context;
GVariant *ret;
GError *error = NULL;
const gchar *channel_path;
GUnixFDList *fd_list;
gint fd_idx, fd;
g_assert (context->priv->daemon == G_DBUS_PROXY (source_object));
ret = g_dbus_proxy_call_with_unix_fd_list_finish (context->priv->daemon,
&fd_list,
res, &error);
if (ret == NULL)
goto create_failed;
g_variant_get (ret, "(&oh)", &channel_path, &fd_idx);
g_variant_unref (ret);
if ((fd = g_unix_fd_list_get (fd_list, fd_idx, &error)) < 0)
goto fd_failed;
priv->fd = fd;
g_object_unref (fd_list);
pinos_subscribe_get_proxy (context->priv->subscribe,
PINOS_DBUS_SERVICE,
channel_path,
"org.pinos.Channel1",
NULL,
on_channel_proxy,
stream);
return;
/* ERRORS */
create_failed:
{
g_warning ("failed to connect: %s", error->message);
goto exit_error;
}
fd_failed:
{
g_warning ("failed to get FD: %s", error->message);
g_object_unref (fd_list);
goto exit_error;
}
exit_error:
{
stream_set_state (stream, PINOS_STREAM_STATE_ERROR, error);
g_object_unref (stream);
return;
}
}
static gboolean
do_connect (PinosStream *stream)
{
PinosStreamPrivate *priv = stream->priv;
PinosContext *context = priv->context;
g_dbus_proxy_call (context->priv->daemon,
"CreateChannel",
g_variant_new ("(sus@a{sv})",
(priv->path ? priv->path : ""),
priv->direction,
g_bytes_get_data (priv->possible_formats, NULL),
pinos_properties_to_variant (priv->properties)),
G_DBUS_CALL_FLAGS_NONE,
-1,
NULL, /* GCancellable *cancellable */
on_channel_created,
stream);
return FALSE;
}
/**
* pinos_stream_connect:
* @stream: a #PinosStream
* @direction: the stream direction
* @port_path: the port path to connect to or %NULL to get the default port
* @flags: a #PinosStreamFlags
* @possible_formats: (transfer full): a #GBytes with possible accepted formats
*
* Connect @stream for input or output on @port_path.
*
* Returns: %TRUE on success.
*/
gboolean
pinos_stream_connect (PinosStream *stream,
PinosDirection direction,
const gchar *port_path,
PinosStreamFlags flags,
GBytes *possible_formats)
{
PinosStreamPrivate *priv;
PinosContext *context;
g_return_val_if_fail (PINOS_IS_STREAM (stream), FALSE);
g_return_val_if_fail (possible_formats != NULL, FALSE);
priv = stream->priv;
context = priv->context;
g_return_val_if_fail (pinos_context_get_state (context) == PINOS_CONTEXT_STATE_CONNECTED, FALSE);
g_return_val_if_fail (pinos_stream_get_state (stream) == PINOS_STREAM_STATE_UNCONNECTED, FALSE);
priv->direction = direction;
g_free (priv->path);
priv->path = g_strdup (port_path);
if (priv->possible_formats)
g_bytes_unref (priv->possible_formats);
priv->flags = flags;
priv->possible_formats = possible_formats;
stream_set_state (stream, PINOS_STREAM_STATE_CONNECTING, NULL);
g_main_context_invoke (context->priv->context,
(GSourceFunc) do_connect,
g_object_ref (stream));
return TRUE;
}
static void
on_stream_started (GObject *source_object,
GAsyncResult *res,
gpointer user_data)
{
PinosStream *stream = user_data;
PinosStreamPrivate *priv = stream->priv;
gchar *format;
GError *error = NULL;
GVariant *result, *properties;
result = g_dbus_proxy_call_finish (priv->channel,
res,
&error);
if (result == NULL)
goto start_failed;
g_variant_get (result,
"(s@a{sv})",
&format,
&properties);
g_variant_unref (result);
if (priv->format)
g_bytes_unref (priv->format);
priv->format = g_bytes_new_take (format, strlen (format) + 1);
g_object_notify (G_OBJECT (stream), "format");
if (priv->properties)
pinos_properties_free (priv->properties);
priv->properties = pinos_properties_from_variant (properties);
g_variant_unref (properties);
g_object_notify (G_OBJECT (stream), "properties");
stream_set_state (stream, PINOS_STREAM_STATE_STREAMING, NULL);
g_object_unref (stream);
return;
/* ERRORS */
start_failed:
{
g_warning ("failed to start: %s", error->message);
goto exit_error;
}
exit_error:
{
stream_set_state (stream, PINOS_STREAM_STATE_ERROR, error);
g_object_unref (stream);
return;
}
}
static gboolean
do_start (PinosStream *stream)
{
PinosStreamPrivate *priv = stream->priv;
PinosBufferBuilder builder;
PinosPacketFormatChange fc;
PinosBuffer pbuf;
GError *error = NULL;
handle_socket (stream, priv->fd);
pinos_stream_buffer_builder_init (stream, &builder);
fc.id = 0;
fc.format = priv->format ? g_bytes_get_data (priv->format, NULL) : "ANY";
pinos_buffer_builder_add_format_change (&builder, &fc);
pinos_buffer_builder_add_empty (&builder, PINOS_PACKET_TYPE_START);
pinos_buffer_builder_end (&builder, &pbuf);
if (!pinos_io_write_buffer (priv->fd, &pbuf, &error)) {
g_warning ("stream %p: failed to read buffer: %s", stream, error->message);
g_clear_error (&error);
}
g_object_unref (stream);
return FALSE;
}
/**
* pinos_stream_start:
* @stream: a #PinosStream
* @format: (transfer full): a #GBytes with format
* @mode: a #PinosStreamMode
*
* Start capturing from @stream in @format.
*
* When @mode is #PINOS_STREAM_MODE_SOCKET, you should connect to the notify::socket
* signal to obtain a readable socket with metadata and data.
*
* When @mode is #PINOS_STREAM_MODE_BUFFER, you should connect to the new-buffer
* signal and use pinos_stream_capture_buffer() to get the latest metadata and
* data.
*
* Returns: %TRUE on success.
*/
gboolean
pinos_stream_start (PinosStream *stream,
GBytes *format,
PinosStreamMode mode)
{
PinosStreamPrivate *priv;
g_return_val_if_fail (PINOS_IS_STREAM (stream), FALSE);
priv = stream->priv;
g_return_val_if_fail (priv->state == PINOS_STREAM_STATE_READY, FALSE);
priv->mode = mode;
priv->format = format;
stream_set_state (stream, PINOS_STREAM_STATE_STARTING, NULL);
g_main_context_invoke (priv->context->priv->context,
(GSourceFunc) do_start,
g_object_ref (stream));
return TRUE;
}
static void
on_stream_stopped (GObject *source_object,
GAsyncResult *res,
gpointer user_data)
{
PinosStream *stream = user_data;
PinosStreamPrivate *priv = stream->priv;
GVariant *ret;
GError *error = NULL;
ret = g_dbus_proxy_call_finish (priv->channel, res, &error);
if (ret == NULL)
goto call_failed;
g_variant_unref (ret);
unhandle_socket (stream);
g_clear_pointer (&priv->format, g_bytes_unref);
g_object_notify (G_OBJECT (stream), "format");
stream_set_state (stream, PINOS_STREAM_STATE_READY, NULL);
g_object_unref (stream);
return;
/* ERRORS */
call_failed:
{
g_warning ("failed to stop: %s", error->message);
stream_set_state (stream, PINOS_STREAM_STATE_ERROR, error);
g_object_unref (stream);
return;
}
}
static gboolean
do_stop (PinosStream *stream)
{
PinosBufferBuilder builder;
pinos_stream_buffer_builder_init (stream, &builder);
pinos_buffer_builder_add_empty (&builder, PINOS_PACKET_TYPE_STOP);
g_object_unref (stream);
return FALSE;
}
/**
* pinos_stream_stop:
* @stream: a #PinosStream
*
* Stop capturing from @stream.
*
* Returns: %TRUE on success.
*/
gboolean
pinos_stream_stop (PinosStream *stream)
{
PinosStreamPrivate *priv;
g_return_val_if_fail (PINOS_IS_STREAM (stream), FALSE);
priv = stream->priv;
g_return_val_if_fail (priv->state == PINOS_STREAM_STATE_STREAMING, FALSE);
g_main_context_invoke (priv->context->priv->context,
(GSourceFunc) do_stop,
g_object_ref (stream));
return TRUE;
}
static void
on_channel_removed (GObject *source_object,
GAsyncResult *res,
gpointer user_data)
{
PinosStream *stream = user_data;
PinosStreamPrivate *priv = stream->priv;
GVariant *ret;
GError *error = NULL;
g_assert (priv->channel == G_DBUS_PROXY (source_object));
priv->disconnecting = FALSE;
g_clear_object (&priv->channel);
ret = g_dbus_proxy_call_finish (G_DBUS_PROXY (source_object), res, &error);
if (ret == NULL)
goto proxy_failed;
g_variant_unref (ret);
stream_set_state (stream, PINOS_STREAM_STATE_UNCONNECTED, NULL);
g_object_unref (stream);
return;
/* ERRORS */
proxy_failed:
{
g_warning ("failed to disconnect: %s", error->message);
stream_set_state (stream, PINOS_STREAM_STATE_ERROR, error);
g_object_unref (stream);
return;
}
}
static gboolean
do_disconnect (PinosStream *stream)
{
PinosStreamPrivate *priv = stream->priv;
g_dbus_proxy_call (priv->channel,
"Remove",
g_variant_new ("()"),
G_DBUS_CALL_FLAGS_NONE,
-1,
NULL, /* GCancellable *cancellable */
on_channel_removed,
stream);
return FALSE;
}
/**
* pinos_stream_disconnect:
* @stream: a #PinosStream
*
* Disconnect @stream.
*
* Returns: %TRUE on success
*/
gboolean
pinos_stream_disconnect (PinosStream *stream)
{
PinosStreamPrivate *priv;
PinosContext *context;
g_return_val_if_fail (PINOS_IS_STREAM (stream), FALSE);
priv = stream->priv;
g_return_val_if_fail (priv->state >= PINOS_STREAM_STATE_READY, FALSE);
g_return_val_if_fail (priv->channel != NULL, FALSE);
context = priv->context;
g_return_val_if_fail (pinos_context_get_state (context) >= PINOS_CONTEXT_STATE_CONNECTED, FALSE);
g_return_val_if_fail (!priv->disconnecting, FALSE);
priv->disconnecting = TRUE;
g_main_context_invoke (context->priv->context,
(GSourceFunc) do_disconnect,
g_object_ref (stream));
return TRUE;
}
/**
* pinos_stream_peek_buffer:
* @stream: a #PinosStream
*
* Get the current buffer from @stream. This function should be called from
* the new-buffer signal callback.
*
* Returns: a #PinosBuffer or %NULL when there is no buffer.
*/
PinosBuffer *
pinos_stream_peek_buffer (PinosStream *stream)
{
PinosStreamPrivate *priv;
g_return_val_if_fail (PINOS_IS_STREAM (stream), NULL);
priv = stream->priv;
return priv->buffer;
}
/**
* pinos_stream_buffer_builder_init:
* @stream: a #PinosStream
* @builder: a #PinosBufferBuilder
*
* Get a #PinosBufferBuilder for @stream.
*
* Returns: a #PinosBuffer or %NULL when there is no buffer.
*/
void
pinos_stream_buffer_builder_init (PinosStream *stream, PinosBufferBuilder *builder)
{
PinosStreamPrivate *priv;
g_return_if_fail (PINOS_IS_STREAM (stream));
priv = stream->priv;
pinos_buffer_builder_init_into (builder,
priv->send_data,
MAX_BUFFER_SIZE,
priv->send_fds,
MAX_FDS);
}
/**
* pinos_stream_send_buffer:
* @stream: a #PinosStream
* @buffer: a #PinosBuffer
*
* Send a buffer to @stream.
*
* For provider streams, this function should be called whenever there is a new frame
* available.
*
* For capture streams, this functions should be called for each fd-payload that
* should be released.
*
* Returns: %TRUE when @buffer was handled
*/
gboolean
pinos_stream_send_buffer (PinosStream *stream,
PinosBuffer *buffer)
{
PinosStreamPrivate *priv;
GError *error = NULL;
g_return_val_if_fail (PINOS_IS_STREAM (stream), FALSE);
g_return_val_if_fail (buffer != NULL, FALSE);
priv = stream->priv;
g_return_val_if_fail (priv->state == PINOS_STREAM_STATE_STREAMING, FALSE);
if (!pinos_io_write_buffer (priv->fd, buffer, &error)) {
g_warning ("stream %p: failed to read buffer: %s", stream, error->message);
g_clear_error (&error);
return FALSE;
}
return TRUE;
}
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