Re: [spice-server v3 10/10] sound: Convert SndChannelClient to RedChannelClient

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Fwiw, see the merged patch attached to this mail. Frediano feels
strongly that these should be merged, so I'll most likely go with this
version.

Christophe

On Thu, Jan 26, 2017 at 11:41:26AM -0600, Jonathon Jongsma wrote:
> On Thu, 2017-01-26 at 07:39 -0500, Frediano Ziglio wrote:
> > > 
> > > SndChannelClient is now inheriting from GObject, and has switched
> > > from using its own code for sending data to using RedChannelClient.
> > > This commit makes it directly inherit from RedChannelClient rather
> > > than
> > > having a channel_client field. This allows to get rid of the whole
> > > DummyChannel/DummyChannelClient code.
> > > 
> > > Based on a patch from Frediano Ziglio <fziglio@xxxxxxxxxx>
> > > 
> > > Signed-off-by: Christophe Fergeau <cfergeau@xxxxxxxxxx>
> > > ---
> 
> [snip]
> 
> > 
> > Still think this should be merged to 9/10.
> > 
> > Frediano
> > 
> 
> Personally I kind of like them as separate commits. But I don't feel
> too strongly either way.
> 
> Jonathon
> _______________________________________________
> Spice-devel mailing list
> Spice-devel@xxxxxxxxxxxxxxxxxxxxx
> https://lists.freedesktop.org/mailman/listinfo/spice-devel
From a2c86f2cad8660bda47688d82211819dbee70ca6 Mon Sep 17 00:00:00 2001
From: Christophe Fergeau <cfergeau@xxxxxxxxxx>
Date: Tue, 10 Jan 2017 16:43:38 +0100
Subject: [spice-server] sound: Convert SndChannelClient to RedChannelClient

Now that SndChannelClient has switched from using its own code for
sending data to using RedChannelClient, it's very close to being an
actual RedChannelClient.
This commit makes it directly inherit from RedChannelClient rather than
having a channel_client field. This allows to get rid of the whole
DummyChannel/DummyChannelClient code.

Based on a patch from Frediano Ziglio <fziglio@xxxxxxxxxx>

Signed-off-by: Christophe Fergeau <cfergeau@xxxxxxxxxx>
---
 server/Makefile.am            |   2 -
 server/dummy-channel-client.c | 140 ---------------
 server/dummy-channel-client.h |  65 -------
 server/sound.c                | 410 +++++++++++++++++++++++-------------------
 4 files changed, 223 insertions(+), 394 deletions(-)
 delete mode 100644 server/dummy-channel-client.c
 delete mode 100644 server/dummy-channel-client.h

diff --git a/server/Makefile.am b/server/Makefile.am
index 90ff779..1442bf1 100644
--- a/server/Makefile.am
+++ b/server/Makefile.am
@@ -104,8 +104,6 @@ libserver_la_SOURCES =				\
 	red-channel-client-private.h		\
 	red-client.c				\
 	red-client.h				\
-	dummy-channel-client.c			\
-	dummy-channel-client.h			\
 	red-common.h				\
 	dispatcher.c				\
 	dispatcher.h				\
diff --git a/server/dummy-channel-client.c b/server/dummy-channel-client.c
deleted file mode 100644
index 4efaa31..0000000
--- a/server/dummy-channel-client.c
+++ /dev/null
@@ -1,140 +0,0 @@
-/*
-   Copyright (C) 2009-2015 Red Hat, Inc.
-
-   This library is free software; you can redistribute it and/or
-   modify it under the terms of the GNU Lesser General Public
-   License as published by the Free Software Foundation; either
-   version 2.1 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
-   Lesser General Public License for more details.
-
-   You should have received a copy of the GNU Lesser General Public
-   License along with this library; if not, see <http://www.gnu.org/licenses/>.
-*/
-#ifdef HAVE_CONFIG_H
-#include <config.h>
-#endif
-
-#include "dummy-channel-client.h"
-#include "red-channel.h"
-#include "red-client.h"
-
-static void dummy_channel_client_initable_interface_init(GInitableIface *iface);
-
-G_DEFINE_TYPE_WITH_CODE(DummyChannelClient, dummy_channel_client, RED_TYPE_CHANNEL_CLIENT,
-                        G_IMPLEMENT_INTERFACE(G_TYPE_INITABLE,
-                                              dummy_channel_client_initable_interface_init))
-
-#define DUMMY_CHANNEL_CLIENT_PRIVATE(o) \
-    (G_TYPE_INSTANCE_GET_PRIVATE((o), TYPE_DUMMY_CHANNEL_CLIENT, DummyChannelClientPrivate))
-
-struct DummyChannelClientPrivate
-{
-    gboolean connected;
-};
-
-static gboolean dummy_channel_client_initable_init(GInitable *initable,
-                                                   GCancellable *cancellable,
-                                                   GError **error)
-{
-    GError *local_error = NULL;
-    RedChannelClient *rcc = RED_CHANNEL_CLIENT(initable);
-    RedClient *client = red_channel_client_get_client(rcc);
-    RedChannel *channel = red_channel_client_get_channel(rcc);
-
-    red_channel_add_client(channel, rcc);
-    if (!red_client_add_channel(client, rcc, &local_error)) {
-        red_channel_remove_client(channel, rcc);
-    }
-
-    if (local_error) {
-        g_warning("Failed to create channel client: %s", local_error->message);
-        g_propagate_error(error, local_error);
-    }
-    return local_error == NULL;
-}
-
-static void dummy_channel_client_initable_interface_init(GInitableIface *iface)
-{
-    iface->init = dummy_channel_client_initable_init;
-}
-
-static gboolean dummy_channel_client_is_connected(RedChannelClient *rcc)
-{
-    return DUMMY_CHANNEL_CLIENT(rcc)->priv->connected;
-}
-
-static void dummy_channel_client_disconnect(RedChannelClient *rcc)
-{
-    DummyChannelClient *self = DUMMY_CHANNEL_CLIENT(rcc);
-    RedChannel *channel = red_channel_client_get_channel(rcc);
-    GList *link;
-    uint32_t type, id;
-
-    if (channel && (link = g_list_find(red_channel_get_clients(channel), rcc))) {
-        g_object_get(channel, "channel-type", &type, "id", &id, NULL);
-        spice_printerr("rcc=%p (channel=%p type=%d id=%d)", rcc, channel,
-                       type, id);
-        red_channel_remove_client(channel, link->data);
-    }
-    self->priv->connected = FALSE;
-}
-
-static void
-dummy_channel_client_class_init(DummyChannelClientClass *klass)
-{
-    RedChannelClientClass *cc_class = RED_CHANNEL_CLIENT_CLASS(klass);
-
-    g_type_class_add_private(klass, sizeof(DummyChannelClientPrivate));
-
-    cc_class->is_connected = dummy_channel_client_is_connected;
-    cc_class->disconnect = dummy_channel_client_disconnect;
-}
-
-static void
-dummy_channel_client_init(DummyChannelClient *self)
-{
-    self->priv = DUMMY_CHANNEL_CLIENT_PRIVATE(self);
-
-    self->priv->connected = TRUE;
-}
-
-RedChannelClient* dummy_channel_client_create(RedChannel *channel,
-                                              RedClient  *client,
-                                              RedsStream *stream,
-                                              int num_common_caps,
-                                              uint32_t *common_caps,
-                                              int num_caps, uint32_t *caps)
-{
-    RedChannelClient *rcc;
-    GArray *common_caps_array = NULL, *caps_array = NULL;
-
-    if (common_caps) {
-        common_caps_array = g_array_sized_new(FALSE, FALSE, sizeof (*common_caps),
-                                              num_common_caps);
-        g_array_append_vals(common_caps_array, common_caps, num_common_caps);
-    }
-    if (caps) {
-        caps_array = g_array_sized_new(FALSE, FALSE, sizeof (*caps), num_caps);
-        g_array_append_vals(caps_array, caps, num_caps);
-    }
-
-    rcc = g_initable_new(TYPE_DUMMY_CHANNEL_CLIENT,
-                         NULL, NULL,
-                         "channel", channel,
-                         "client", client,
-                         "stream", stream,
-                         "caps", caps_array,
-                         "common-caps", common_caps_array,
-                         NULL);
-
-    if (caps_array)
-        g_array_unref(caps_array);
-    if (common_caps_array)
-        g_array_unref(common_caps_array);
-
-    return rcc;
-}
diff --git a/server/dummy-channel-client.h b/server/dummy-channel-client.h
deleted file mode 100644
index 54e0e6c..0000000
--- a/server/dummy-channel-client.h
+++ /dev/null
@@ -1,65 +0,0 @@
-/*
-   Copyright (C) 2009-2015 Red Hat, Inc.
-
-   This library is free software; you can redistribute it and/or
-   modify it under the terms of the GNU Lesser General Public
-   License as published by the Free Software Foundation; either
-   version 2.1 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
-   Lesser General Public License for more details.
-
-   You should have received a copy of the GNU Lesser General Public
-   License along with this library; if not, see <http://www.gnu.org/licenses/>.
-   */
-#ifndef __DUMMY_CHANNEL_CLIENT_H__
-#define __DUMMY_CHANNEL_CLIENT_H__
-
-#include <glib-object.h>
-
-#include "red-channel-client.h"
-
-G_BEGIN_DECLS
-
-#define TYPE_DUMMY_CHANNEL_CLIENT dummy_channel_client_get_type()
-
-#define DUMMY_CHANNEL_CLIENT(obj) \
-    (G_TYPE_CHECK_INSTANCE_CAST ((obj), TYPE_DUMMY_CHANNEL_CLIENT, DummyChannelClient))
-#define DUMMY_CHANNEL_CLIENT_CLASS(klass) \
-    (G_TYPE_CHECK_CLASS_CAST ((klass), TYPE_DUMMY_CHANNEL_CLIENT, DummyChannelClientClass))
-#define IS_DUMMY_CHANNEL_CLIENT(obj) \
-    (G_TYPE_CHECK_INSTANCE_TYPE ((obj), TYPE_DUMMY_CHANNEL_CLIENT))
-#define IS_DUMMY_CHANNEL_CLIENT_CLASS(klass) \
-    (G_TYPE_CHECK_CLASS_TYPE ((klass), TYPE_DUMMY_CHANNEL_CLIENT))
-#define DUMMY_CHANNEL_CLIENT_GET_CLASS(obj) \
-    (G_TYPE_INSTANCE_GET_CLASS ((obj), TYPE_DUMMY_CHANNEL_CLIENT, DummyChannelClientClass))
-
-typedef struct DummyChannelClient DummyChannelClient;
-typedef struct DummyChannelClientClass DummyChannelClientClass;
-typedef struct DummyChannelClientPrivate DummyChannelClientPrivate;
-
-struct DummyChannelClient
-{
-    RedChannelClient parent;
-
-    DummyChannelClientPrivate *priv;
-};
-
-struct DummyChannelClientClass
-{
-    RedChannelClientClass parent_class;
-};
-
-GType dummy_channel_client_get_type(void) G_GNUC_CONST;
-
-RedChannelClient *dummy_channel_client_create(RedChannel *channel,
-                                              RedClient  *client,
-                                              RedsStream *stream,
-                                              int num_common_caps, uint32_t *common_caps,
-                                              int num_caps, uint32_t *caps);
-
-G_END_DECLS
-
-#endif /* __DUMMY_CHANNEL_CLIENT_H__ */
diff --git a/server/sound.c b/server/sound.c
index 39235f0..7095e2b 100644
--- a/server/sound.c
+++ b/server/sound.c
@@ -31,13 +31,10 @@
 
 #include "spice.h"
 #include "red-common.h"
-#include "dummy-channel-client.h"
 #include "main-channel.h"
 #include "reds.h"
 #include "red-qxl.h"
 #include "red-channel-client.h"
-/* FIXME: for now, allow sound channel access to private RedChannelClient data */
-#include "red-channel-client-private.h"
 #include "red-client.h"
 #include "sound.h"
 #include "main-channel-client.h"
@@ -83,15 +80,16 @@ typedef struct SpicePlaybackState PlaybackChannel;
 typedef struct SpiceRecordState RecordChannel;
 
 typedef void (*snd_channel_on_message_done_proc)(SndChannelClient *client);
-typedef void (*snd_channel_cleanup_channel_proc)(SndChannelClient *client);
 
-#define SND_CHANNEL_CLIENT(obj) (&(obj)->base)
+
+#define TYPE_SND_CHANNEL_CLIENT snd_channel_client_get_type()
+#define SND_CHANNEL_CLIENT(obj) \
+    (G_TYPE_CHECK_INSTANCE_CAST((obj), TYPE_SND_CHANNEL_CLIENT, SndChannelClient))
+GType snd_channel_client_get_type(void) G_GNUC_CONST;
 
 /* Connects an audio client to a Spice client */
 struct SndChannelClient {
-    int refs;
-
-    RedChannelClient *channel_client;
+    RedChannelClient parent;
 
     int active;
     int client_active;
@@ -104,9 +102,14 @@ struct SndChannelClient {
     RedPipeItem persistent_pipe_item;
 
     snd_channel_on_message_done_proc on_message_done;
-    snd_channel_cleanup_channel_proc cleanup;
 };
 
+typedef struct SndChannelClientClass {
+    RedChannelClientClass parent_class;
+} SndChannelClientClass;
+
+G_DEFINE_TYPE(SndChannelClient, snd_channel_client, RED_TYPE_CHANNEL_CLIENT)
+
 
 enum {
     RED_PIPE_ITEM_PERSISTENT = RED_PIPE_ITEM_TYPE_CHANNEL_BASE,
@@ -129,8 +132,13 @@ struct AudioFrameContainer
     AudioFrame items[NUM_AUDIO_FRAMES];
 };
 
+#define TYPE_PLAYBACK_CHANNEL_CLIENT playback_channel_client_get_type()
+#define PLAYBACK_CHANNEL_CLIENT(obj) \
+    (G_TYPE_CHECK_INSTANCE_CAST((obj), TYPE_PLAYBACK_CHANNEL_CLIENT, PlaybackChannelClient))
+GType playback_channel_client_get_type(void) G_GNUC_CONST;
+
 struct PlaybackChannelClient {
-    SndChannelClient base;
+    SndChannelClient parent;
 
     AudioFrameContainer *frames;
     AudioFrame *free_frames;
@@ -142,6 +150,13 @@ struct PlaybackChannelClient {
     uint8_t  encode_buf[SND_CODEC_MAX_COMPRESSED_BYTES];
 };
 
+typedef struct PlaybackChannelClientClass {
+    SndChannelClientClass parent_class;
+} PlaybackChannelClientClass;
+
+G_DEFINE_TYPE(PlaybackChannelClient, playback_channel_client, TYPE_SND_CHANNEL_CLIENT)
+
+
 typedef struct SpiceVolumeState {
     uint16_t *volume;
     uint8_t volume_nchannels;
@@ -202,8 +217,13 @@ typedef struct RecordChannelClass {
 G_DEFINE_TYPE(RecordChannel, record_channel, TYPE_SND_CHANNEL)
 
 
+#define TYPE_RECORD_CHANNEL_CLIENT record_channel_client_get_type()
+#define RECORD_CHANNEL_CLIENT(obj) \
+    (G_TYPE_CHECK_INSTANCE_CAST((obj), TYPE_RECORD_CHANNEL_CLIENT, RecordChannelClient))
+GType record_channel_client_get_type(void) G_GNUC_CONST;
+
 struct RecordChannelClient {
-    SndChannelClient base;
+    SndChannelClient parent;
     uint32_t samples[RECORD_SAMPLES_SIZE];
     uint32_t write_pos;
     uint32_t read_pos;
@@ -214,60 +234,24 @@ struct RecordChannelClient {
     uint8_t  decode_buf[SND_CODEC_MAX_FRAME_BYTES];
 };
 
+typedef struct RecordChannelClientClass {
+    SndChannelClientClass parent_class;
+} RecordChannelClientClass;
+
+G_DEFINE_TYPE(RecordChannelClient, record_channel_client, TYPE_SND_CHANNEL_CLIENT)
+
+
 /* A list of all Spice{Playback,Record}State objects */
 static SndChannel *snd_channels;
 
 static void snd_playback_start(SndChannel *channel);
 static void snd_record_start(SndChannel *channel);
-static void snd_playback_alloc_frames(PlaybackChannelClient *playback);
 static void snd_send(SndChannelClient * client);
 
-static SndChannelClient *snd_channel_unref(SndChannelClient *client)
-{
-    if (!--client->refs) {
-        spice_printerr("SndChannelClient=%p freed", client);
-        free(client);
-        return NULL;
-    }
-    return client;
-}
-
-static SndChannelClient *snd_channel_client_from_dummy(RedChannelClient *dummy)
-{
-    SndChannelClient *sound_client;
-
-    g_assert(IS_DUMMY_CHANNEL_CLIENT(dummy));
-    sound_client =  g_object_get_data(G_OBJECT(dummy), "sound-channel-client");
-
-    return sound_client;
-}
-
 static RedsState* snd_channel_get_server(SndChannelClient *client)
 {
     g_return_val_if_fail(client != NULL, NULL);
-    return red_channel_get_server(red_channel_client_get_channel(client->channel_client));
-}
-
-static void snd_disconnect_channel(SndChannelClient *client)
-{
-    SndChannel *channel;
-    RedChannel *red_channel;
-    uint32_t type;
-
-    if (!client || !red_channel_client_is_connected(client->channel_client)) {
-        spice_debug("not connected");
-        return;
-    }
-    red_channel = red_channel_client_get_channel(client->channel_client);
-    g_object_get(red_channel, "channel-type", &type, NULL);
-    spice_debug("SndChannelClient=%p rcc=%p type=%d",
-                 client, client->channel_client, type);
-    channel = SND_CHANNEL(red_channel);
-    client->cleanup(client);
-    red_channel_client_disconnect(channel->connection->channel_client);
-    channel->connection->channel_client = NULL;
-    snd_channel_unref(client);
-    channel->connection = NULL;
+    return red_channel_get_server(red_channel_client_get_channel(RED_CHANNEL_CLIENT(client)));
 }
 
 static void snd_playback_free_frame(PlaybackChannelClient *playback_client, AudioFrame *frame)
@@ -290,10 +274,6 @@ static void snd_playback_on_message_done(SndChannelClient *client)
     }
 }
 
-static void snd_record_on_message_done(SndChannelClient *client)
-{
-}
-
 static int snd_record_handle_write(RecordChannelClient *record_client, size_t size, void *message)
 {
     SpiceMsgcRecordPacket *packet;
@@ -354,8 +334,7 @@ playback_channel_handle_parsed(RedChannelClient *rcc, uint32_t size, uint16_t ty
 static int
 record_channel_handle_parsed(RedChannelClient *rcc, uint32_t size, uint16_t type, void *message)
 {
-    SndChannelClient *snd_client = snd_channel_client_from_dummy(rcc);
-    RecordChannelClient *record_client = SPICE_CONTAINEROF(snd_client, RecordChannelClient, base);
+    RecordChannelClient *record_client = RECORD_CHANNEL_CLIENT(rcc);
 
     switch (type) {
     case SPICE_MSGC_RECORD_DATA:
@@ -399,7 +378,7 @@ record_channel_handle_parsed(RedChannelClient *rcc, uint32_t size, uint16_t type
 
 static int snd_channel_send_migrate(SndChannelClient *client)
 {
-    RedChannelClient *rcc = client->channel_client;
+    RedChannelClient *rcc = RED_CHANNEL_CLIENT(client);
     SpiceMarshaller *m = red_channel_client_get_marshaller(rcc);
     SpiceMsgMigrate migrate;
 
@@ -420,7 +399,7 @@ static int snd_send_volume(SndChannelClient *client, uint32_t cap, int msg)
 {
     SpiceMsgAudioVolume *vol;
     uint8_t c;
-    RedChannelClient *rcc = client->channel_client;
+    RedChannelClient *rcc = RED_CHANNEL_CLIENT(client);
     SpiceMarshaller *m = red_channel_client_get_marshaller(rcc);
     SndChannel *channel = SND_CHANNEL(red_channel_client_get_channel(rcc));
     SpiceVolumeState *st = &channel->volume;
@@ -451,7 +430,7 @@ static int snd_playback_send_volume(PlaybackChannelClient *playback_client)
 static int snd_send_mute(SndChannelClient *client, uint32_t cap, int msg)
 {
     SpiceMsgAudioMute mute;
-    RedChannelClient *rcc = client->channel_client;
+    RedChannelClient *rcc = RED_CHANNEL_CLIENT(client);
     SpiceMarshaller *m = red_channel_client_get_marshaller(rcc);
     SndChannel *channel = SND_CHANNEL(red_channel_client_get_channel(rcc));
     SpiceVolumeState *st = &channel->volume;
@@ -476,8 +455,7 @@ static int snd_playback_send_mute(PlaybackChannelClient *playback_client)
 
 static int snd_playback_send_latency(PlaybackChannelClient *playback_client)
 {
-    SndChannelClient *client = SND_CHANNEL_CLIENT(playback_client);
-    RedChannelClient *rcc = client->channel_client;
+    RedChannelClient *rcc = RED_CHANNEL_CLIENT(playback_client);
     SpiceMarshaller *m = red_channel_client_get_marshaller(rcc);
     SpiceMsgPlaybackLatency latency_msg;
 
@@ -492,8 +470,7 @@ static int snd_playback_send_latency(PlaybackChannelClient *playback_client)
 
 static int snd_playback_send_start(PlaybackChannelClient *playback_client)
 {
-    SndChannelClient *client = (SndChannelClient *)playback_client;
-    RedChannelClient *rcc = client->channel_client;
+    RedChannelClient *rcc = RED_CHANNEL_CLIENT(playback_client);
     SpiceMarshaller *m = red_channel_client_get_marshaller(rcc);
     SpiceMsgPlaybackStart start;
 
@@ -511,8 +488,7 @@ static int snd_playback_send_start(PlaybackChannelClient *playback_client)
 
 static int snd_playback_send_stop(PlaybackChannelClient *playback_client)
 {
-    SndChannelClient *client = (SndChannelClient *)playback_client;
-    RedChannelClient *rcc = client->channel_client;
+    RedChannelClient *rcc = RED_CHANNEL_CLIENT(playback_client);
 
     red_channel_client_init_send_data(rcc, SPICE_MSG_PLAYBACK_STOP);
 
@@ -533,8 +509,7 @@ static int snd_playback_send_ctl(PlaybackChannelClient *playback_client)
 
 static int snd_record_send_start(RecordChannelClient *record_client)
 {
-    SndChannelClient *client = (SndChannelClient *)record_client;
-    RedChannelClient *rcc = client->channel_client;
+    RedChannelClient *rcc = RED_CHANNEL_CLIENT(record_client);
     SpiceMarshaller *m = red_channel_client_get_marshaller(rcc);
     SpiceMsgRecordStart start;
 
@@ -552,8 +527,7 @@ static int snd_record_send_start(RecordChannelClient *record_client)
 
 static int snd_record_send_stop(RecordChannelClient *record_client)
 {
-    SndChannelClient *client = (SndChannelClient *)record_client;
-    RedChannelClient *rcc = client->channel_client;
+    RedChannelClient *rcc = RED_CHANNEL_CLIENT(record_client);
 
     red_channel_client_init_send_data(rcc, SPICE_MSG_RECORD_STOP);
 
@@ -595,8 +569,7 @@ static int snd_record_send_migrate(RecordChannelClient *record_client)
 
 static int snd_playback_send_write(PlaybackChannelClient *playback_client)
 {
-    SndChannelClient *client = (SndChannelClient *)playback_client;
-    RedChannelClient *rcc = client->channel_client;
+    RedChannelClient *rcc = RED_CHANNEL_CLIENT(playback_client);
     SpiceMarshaller *m = red_channel_client_get_marshaller(rcc);
     AudioFrame *frame;
     SpiceMsgPlaybackPacket msg;
@@ -621,7 +594,7 @@ static int snd_playback_send_write(PlaybackChannelClient *playback_client)
                                     snd_codec_frame_size(playback_client->codec) * sizeof(frame->samples[0]),
                                     playback_client->encode_buf, &n) != SND_CODEC_OK) {
             spice_printerr("encode failed");
-            snd_disconnect_channel(client);
+            red_channel_client_disconnect(rcc);
             return FALSE;
         }
         spice_marshaller_add_by_ref_full(m, playback_client->encode_buf, n,
@@ -634,8 +607,7 @@ static int snd_playback_send_write(PlaybackChannelClient *playback_client)
 
 static int playback_send_mode(PlaybackChannelClient *playback_client)
 {
-    SndChannelClient *client = (SndChannelClient *)playback_client;
-    RedChannelClient *rcc = client->channel_client;
+    RedChannelClient *rcc = RED_CHANNEL_CLIENT(playback_client);
     SpiceMarshaller *m = red_channel_client_get_marshaller(rcc);
     SpiceMsgPlaybackMode mode;
 
@@ -648,48 +620,6 @@ static int playback_send_mode(PlaybackChannelClient *playback_client)
     return TRUE;
 }
 
-static int snd_channel_config_socket(RedChannelClient *rcc);
-
-static SndChannelClient *__new_channel(SndChannel *channel, int size, uint32_t channel_id,
-                                       RedClient *red_client,
-                                       RedsStream *stream,
-                                       snd_channel_on_message_done_proc on_message_done,
-                                       snd_channel_cleanup_channel_proc cleanup,
-                                       uint32_t *common_caps, int num_common_caps,
-                                       uint32_t *caps, int num_caps)
-{
-    SndChannelClient *client;
-
-    spice_assert(size >= sizeof(*client));
-    client = spice_malloc0(size);
-    client->refs = 1;
-    client->on_message_done = on_message_done;
-    client->cleanup = cleanup;
-
-    client->channel_client =
-        dummy_channel_client_create(RED_CHANNEL(channel), red_client, stream,
-                                    num_common_caps, common_caps, num_caps, caps);
-    if (!client->channel_client) {
-        goto error2;
-    }
-
-    /* SndChannelClient is not yet a RedChannelClient, but we still need to go from our
-     * RedChannelClient implementation (DummyChannelClient) to the SndChannelClient instance
-     * in various vfuncs
-     */
-    g_object_set_data(G_OBJECT(client->channel_client), "sound-channel-client", client);
-
-    if (!snd_channel_config_socket(RED_CHANNEL_CLIENT(client->channel_client))) {
-        goto error2;
-    }
-
-    return client;
-
-error2:
-    free(client);
-    return NULL;
-}
-
 /* This function is called when the "persistent" item is removed from the
  * queue. Note that there is not free call as the item is allocated into
  * SndChannelClient.
@@ -715,9 +645,9 @@ static void snd_send(SndChannelClient * client)
 {
     RedChannelClient *rcc;
 
-    g_return_if_fail(client != NULL);
+    g_return_if_fail(RED_IS_CHANNEL_CLIENT(client));
 
-    rcc = client->channel_client;
+    rcc = RED_CHANNEL_CLIENT(client);
     if (!red_channel_client_pipe_is_empty(rcc) || !client->command) {
         return;
     }
@@ -729,8 +659,8 @@ static void snd_send(SndChannelClient * client)
 
 static void playback_channel_send_item(RedChannelClient *rcc, G_GNUC_UNUSED RedPipeItem *item)
 {
-    SndChannelClient *client = snd_channel_client_from_dummy(rcc);
-    PlaybackChannelClient *playback_client = SPICE_CONTAINEROF(client, PlaybackChannelClient, base);
+    PlaybackChannelClient *playback_client = PLAYBACK_CHANNEL_CLIENT(rcc);
+    SndChannelClient *client = SND_CHANNEL_CLIENT(rcc);
 
     client->command &= SND_PLAYBACK_MODE_MASK|SND_PLAYBACK_PCM_MASK|
                        SND_CTRL_MASK|SND_VOLUME_MUTE_MASK|
@@ -788,8 +718,8 @@ static void playback_channel_send_item(RedChannelClient *rcc, G_GNUC_UNUSED RedP
 
 static void record_channel_send_item(RedChannelClient *rcc, G_GNUC_UNUSED RedPipeItem *item)
 {
-    SndChannelClient *client = snd_channel_client_from_dummy(rcc);
-    RecordChannelClient *record_client = SPICE_CONTAINEROF(client, RecordChannelClient, base);
+    RecordChannelClient *record_client = RECORD_CHANNEL_CLIENT(rcc);
+    SndChannelClient *client = SND_CHANNEL_CLIENT(rcc);
 
     client->command &= SND_CTRL_MASK|SND_VOLUME_MUTE_MASK|SND_MIGRATE_MASK;
     while (client->command) {
@@ -881,7 +811,7 @@ static void snd_channel_on_disconnect(RedChannelClient *rcc)
 static uint8_t*
 snd_channel_client_alloc_recv_buf(RedChannelClient *rcc, uint16_t type, uint32_t size)
 {
-    SndChannelClient *client = snd_channel_client_from_dummy(rcc);
+    SndChannelClient *client = SND_CHANNEL_CLIENT(rcc);
     // If message is too big allocate one, this should never happen
     if (size > sizeof(client->receive_buf)) {
         return spice_malloc(size);
@@ -893,7 +823,7 @@ static void
 snd_channel_client_release_recv_buf(RedChannelClient *rcc, uint16_t type, uint32_t size,
                                     uint8_t *msg)
 {
-    SndChannelClient *client = snd_channel_client_from_dummy(rcc);
+    SndChannelClient *client = SND_CHANNEL_CLIENT(rcc);
     if (msg != client->receive_buf) {
         free(msg);
     }
@@ -911,8 +841,8 @@ static void snd_disconnect_channel_client(RedChannelClient *rcc)
 
     spice_debug("channel-type=%d", type);
     if (channel->connection) {
-        spice_assert(channel->connection->channel_client == rcc);
-        snd_disconnect_channel(channel->connection);
+        spice_assert(RED_CHANNEL_CLIENT(channel->connection) == rcc);
+        red_channel_client_disconnect(rcc);
     }
 }
 
@@ -986,7 +916,7 @@ SPICE_GNUC_VISIBLE void spice_server_playback_stop(SpicePlaybackInstance *sin)
     sin->st->channel.active = 0;
     if (!client)
         return;
-    PlaybackChannelClient *playback_client = SPICE_CONTAINEROF(client, PlaybackChannelClient, base);
+    PlaybackChannelClient *playback_client = PLAYBACK_CHANNEL_CLIENT(client);
     spice_assert(client->active);
     reds_enable_mm_time(snd_channel_get_server(client));
     client->active = FALSE;
@@ -1016,7 +946,7 @@ SPICE_GNUC_VISIBLE void spice_server_playback_get_buffer(SpicePlaybackInstance *
     if (!client) {
         return;
     }
-    PlaybackChannelClient *playback_client = SPICE_CONTAINEROF(client, PlaybackChannelClient, base);
+    PlaybackChannelClient *playback_client = PLAYBACK_CHANNEL_CLIENT(client);
     if (!playback_client->free_frames) {
         return;
     }
@@ -1069,9 +999,9 @@ void snd_set_playback_latency(RedClient *client, uint32_t latency)
         uint32_t type;
         g_object_get(RED_CHANNEL(now), "channel-type", &type, NULL);
         if (type == SPICE_CHANNEL_PLAYBACK && now->connection &&
-            red_channel_client_get_client(now->connection->channel_client) == client) {
+            red_channel_client_get_client(RED_CHANNEL_CLIENT(now->connection)) == client) {
 
-            if (red_channel_client_test_remote_cap(now->connection->channel_client,
+            if (red_channel_client_test_remote_cap(RED_CHANNEL_CLIENT(now->connection),
                 SPICE_PLAYBACK_CAP_LATENCY)) {
                 PlaybackChannelClient* playback = (PlaybackChannelClient*)now->connection;
 
@@ -1119,10 +1049,12 @@ static void on_new_playback_channel_client(SndChannel *channel, SndChannelClient
     }
 }
 
-static void snd_playback_cleanup(SndChannelClient *client)
+static void
+playback_channel_client_finalize(GObject *object)
 {
-    PlaybackChannelClient *playback_client = SPICE_CONTAINEROF(client, PlaybackChannelClient, base);
     int i;
+    PlaybackChannelClient *playback_client = PLAYBACK_CHANNEL_CLIENT(object);
+    SndChannelClient *client = SND_CHANNEL_CLIENT(playback_client);
 
     // free frames, unref them
     for (i = 0; i < NUM_AUDIO_FRAMES; ++i) {
@@ -1137,41 +1069,31 @@ static void snd_playback_cleanup(SndChannelClient *client)
     }
 
     snd_codec_destroy(&playback_client->codec);
+
+    G_OBJECT_CLASS(playback_channel_client_parent_class)->finalize(object);
 }
 
-static void snd_set_playback_peer(RedChannel *red_channel, RedClient *client, RedsStream *stream,
-                                  G_GNUC_UNUSED int migration,
-                                  int num_common_caps, uint32_t *common_caps,
-                                  int num_caps, uint32_t *caps)
+static void
+playback_channel_client_constructed(GObject *object)
 {
+    PlaybackChannelClient *playback_client = PLAYBACK_CHANNEL_CLIENT(object);
+    RedChannel *red_channel = red_channel_client_get_channel(RED_CHANNEL_CLIENT(playback_client));
+    RedClient *client = red_channel_client_get_client(RED_CHANNEL_CLIENT(playback_client));
     SndChannel *channel = SND_CHANNEL(red_channel);
-    PlaybackChannelClient *playback_client;
 
-    snd_disconnect_channel(channel->connection);
+    G_OBJECT_CLASS(playback_channel_client_parent_class)->constructed(object);
 
-    if (!(playback_client = (PlaybackChannelClient *)__new_channel(channel,
-                                                                   sizeof(*playback_client),
-                                                                   SPICE_CHANNEL_PLAYBACK,
-                                                                   client,
-                                                                   stream,
-                                                                   snd_playback_on_message_done,
-                                                                   snd_playback_cleanup,
-                                                                   common_caps, num_common_caps,
-                                                                   caps, num_caps))) {
-        return;
-    }
+    SND_CHANNEL_CLIENT(playback_client)->on_message_done = snd_playback_on_message_done;
 
-    snd_playback_alloc_frames(playback_client);
-
-    int client_can_celt = red_channel_client_test_remote_cap(playback_client->base.channel_client,
+    RedChannelClient *rcc = RED_CHANNEL_CLIENT(playback_client);
+    int client_can_celt = red_channel_client_test_remote_cap(rcc,
                                           SPICE_PLAYBACK_CAP_CELT_0_5_1);
-    int client_can_opus = red_channel_client_test_remote_cap(playback_client->base.channel_client,
+    int client_can_opus = red_channel_client_test_remote_cap(rcc,
                                           SPICE_PLAYBACK_CAP_OPUS);
     int playback_compression =
         reds_config_get_playback_compression(red_channel_get_server(red_channel));
     int desired_mode = snd_desired_audio_mode(playback_compression, channel->frequency,
                                               client_can_celt, client_can_opus);
-    playback_client->mode = SPICE_AUDIO_DATA_MODE_RAW;
     if (desired_mode != SPICE_AUDIO_DATA_MODE_RAW) {
         if (snd_codec_create(&playback_client->codec, desired_mode, channel->frequency,
                              SND_CODEC_ENCODE) == SND_CODEC_OK) {
@@ -1188,7 +1110,49 @@ static void snd_set_playback_peer(RedChannel *red_channel, RedClient *client, Re
     if (channel->active) {
         snd_playback_start(channel);
     }
-    snd_send(channel->connection);
+    snd_send(SND_CHANNEL_CLIENT(playback_client));
+}
+
+static void snd_set_playback_peer(RedChannel *red_channel, RedClient *client, RedsStream *stream,
+                                  G_GNUC_UNUSED int migration,
+                                  int num_common_caps, uint32_t *common_caps,
+                                  int num_caps, uint32_t *caps)
+{
+    SndChannel *channel = SND_CHANNEL(red_channel);
+    GArray *common_caps_array = NULL, *caps_array = NULL;
+    PlaybackChannelClient *playback_client;
+
+    if (channel->connection) {
+        red_channel_client_disconnect(RED_CHANNEL_CLIENT(channel->connection));
+        channel->connection = NULL;
+    }
+
+    if (common_caps) {
+        common_caps_array = g_array_sized_new(FALSE, FALSE, sizeof (*common_caps),
+                                              num_common_caps);
+        g_array_append_vals(common_caps_array, common_caps, num_common_caps);
+    }
+    if (caps) {
+        caps_array = g_array_sized_new(FALSE, FALSE, sizeof (*caps), num_caps);
+        g_array_append_vals(caps_array, caps, num_caps);
+    }
+
+    playback_client = g_initable_new(TYPE_PLAYBACK_CHANNEL_CLIENT,
+                                     NULL, NULL,
+                                     "channel", channel,
+                                     "client", client,
+                                     "stream", stream,
+                                     "caps", caps_array,
+                                     "common-caps", common_caps_array,
+                                     NULL);
+    g_warn_if_fail(playback_client != NULL);
+
+    if (caps_array) {
+        g_array_unref(caps_array);
+    }
+    if (common_caps_array) {
+        g_array_unref(common_caps_array);
+    }
 }
 
 static void snd_record_migrate_channel_client(RedChannelClient *rcc)
@@ -1200,7 +1164,7 @@ static void snd_record_migrate_channel_client(RedChannelClient *rcc)
     spice_assert(channel);
 
     if (channel->connection) {
-        spice_assert(channel->connection->channel_client == rcc);
+        spice_assert(RED_CHANNEL_CLIENT(channel->connection) == rcc);
         snd_set_command(channel->connection, SND_MIGRATE_MASK);
         snd_send(channel->connection);
     }
@@ -1243,9 +1207,10 @@ static void snd_record_start(SndChannel *channel)
     SndChannelClient *client = channel->connection;
 
     channel->active = 1;
-    if (!client)
+    if (!client) {
         return;
-    RecordChannelClient *record_client = SPICE_CONTAINEROF(client, RecordChannelClient, base);
+    }
+    RecordChannelClient *record_client = RECORD_CHANNEL_CLIENT(client);
     spice_assert(!client->active);
     record_client->read_pos = record_client->write_pos = 0;   //todo: improve by
                                                               //stream generation
@@ -1290,7 +1255,7 @@ SPICE_GNUC_VISIBLE uint32_t spice_server_record_get_samples(SpiceRecordInstance
 
     if (!client)
         return 0;
-    RecordChannelClient *record_client = SPICE_CONTAINEROF(client, RecordChannelClient, base);
+    RecordChannelClient *record_client = RECORD_CHANNEL_CLIENT(client);
     spice_assert(client->active);
 
     if (record_client->write_pos < RECORD_SAMPLES_SIZE / 2) {
@@ -1313,7 +1278,7 @@ static uint32_t snd_get_best_rate(SndChannelClient *client, uint32_t cap_opus)
 {
     int client_can_opus = TRUE;
     if (client) {
-        client_can_opus = red_channel_client_test_remote_cap(client->channel_client, cap_opus);
+        client_can_opus = red_channel_client_test_remote_cap(RED_CHANNEL_CLIENT(client), cap_opus);
     }
 
     if (client_can_opus && snd_codec_is_capable(SPICE_AUDIO_DATA_MODE_OPUS, SND_CODEC_ANY_FREQUENCY))
@@ -1364,41 +1329,73 @@ static void on_new_record_channel_client(SndChannel *channel, SndChannelClient *
     }
 }
 
-static void snd_record_cleanup(SndChannelClient *client)
+static void
+record_channel_client_finalize(GObject *object)
 {
-    RecordChannelClient *record_client = SPICE_CONTAINEROF(client, RecordChannelClient, base);
+    RecordChannelClient *record_client = RECORD_CHANNEL_CLIENT(object);
+
     snd_codec_destroy(&record_client->codec);
+
+    G_OBJECT_CLASS(record_channel_client_parent_class)->finalize(object);
 }
 
+static void
+record_channel_client_constructed(GObject *object)
+{
+    RecordChannelClient *record_client = RECORD_CHANNEL_CLIENT(object);
+    RedChannel *red_channel = red_channel_client_get_channel(RED_CHANNEL_CLIENT(record_client));
+    SndChannel *channel = SND_CHANNEL(red_channel);
+
+    G_OBJECT_CLASS(record_channel_client_parent_class)->constructed(object);
+
+    on_new_record_channel_client(channel, SND_CHANNEL_CLIENT(record_client));
+    if (channel->active) {
+        snd_record_start(channel);
+    }
+    snd_send(SND_CHANNEL_CLIENT(record_client));
+}
+
+
 static void snd_set_record_peer(RedChannel *red_channel, RedClient *client, RedsStream *stream,
                                 G_GNUC_UNUSED int migration,
                                 int num_common_caps, uint32_t *common_caps,
                                 int num_caps, uint32_t *caps)
 {
     SndChannel *channel = SND_CHANNEL(red_channel);
+    GArray *common_caps_array = NULL, *caps_array = NULL;
     RecordChannelClient *record_client;
 
-    snd_disconnect_channel(channel->connection);
+    if (channel->connection) {
+        red_channel_client_disconnect(RED_CHANNEL_CLIENT(channel->connection));
+        channel->connection = NULL;
+    }
 
-    if (!(record_client = (RecordChannelClient *)__new_channel(channel,
-                                                               sizeof(*record_client),
-                                                               SPICE_CHANNEL_RECORD,
-                                                               client,
-                                                               stream,
-                                                               snd_record_on_message_done,
-                                                               snd_record_cleanup,
-                                                               common_caps, num_common_caps,
-                                                               caps, num_caps))) {
-        return;
+    if (common_caps) {
+        common_caps_array = g_array_sized_new(FALSE, FALSE, sizeof (*common_caps),
+                                              num_common_caps);
+        g_array_append_vals(common_caps_array, common_caps, num_common_caps);
+    }
+    if (caps) {
+        caps_array = g_array_sized_new(FALSE, FALSE, sizeof (*caps), num_caps);
+        g_array_append_vals(caps_array, caps, num_caps);
     }
 
-    record_client->mode = SPICE_AUDIO_DATA_MODE_RAW;
+    record_client = g_initable_new(TYPE_RECORD_CHANNEL_CLIENT,
+                                   NULL, NULL,
+                                   "channel", channel,
+                                   "client", client,
+                                   "stream", stream,
+                                   "caps", caps_array,
+                                   "common-caps", common_caps_array,
+                                   NULL);
+    g_warn_if_fail(record_client != NULL);
 
-    on_new_record_channel_client(channel, SND_CHANNEL_CLIENT(record_client));
-    if (channel->active) {
-        snd_record_start(channel);
+    if (caps_array) {
+        g_array_unref(caps_array);
+    }
+    if (common_caps_array) {
+        g_array_unref(common_caps_array);
     }
-    snd_send(channel->connection);
 }
 
 static void snd_playback_migrate_channel_client(RedChannelClient *rcc)
@@ -1411,7 +1408,7 @@ static void snd_playback_migrate_channel_client(RedChannelClient *rcc)
     spice_debug(NULL);
 
     if (channel->connection) {
-        spice_assert(channel->connection->channel_client == rcc);
+        spice_assert(RED_CHANNEL_CLIENT(channel->connection) == rcc);
         snd_set_command(channel->connection, SND_MIGRATE_MASK);
         snd_send(channel->connection);
     }
@@ -1563,7 +1560,6 @@ static void snd_detach_common(SndChannel *channel)
     RedsState *reds = red_channel_get_server(RED_CHANNEL(channel));
 
     remove_channel(channel);
-    snd_disconnect_channel(channel->connection);
     reds_unregister_channel(reds, RED_CHANNEL(channel));
     free(channel->volume.volume);
     channel->volume.volume = NULL;
@@ -1589,9 +1585,10 @@ void snd_set_playback_compression(int on)
         g_object_get(RED_CHANNEL(now), "channel-type", &type, NULL);
         if (type == SPICE_CHANNEL_PLAYBACK && now->connection) {
             PlaybackChannelClient* playback = (PlaybackChannelClient*)now->connection;
-            int client_can_celt = red_channel_client_test_remote_cap(playback->base.channel_client,
+            RedChannelClient *rcc = RED_CHANNEL_CLIENT(playback);
+            int client_can_celt = red_channel_client_test_remote_cap(rcc,
                                     SPICE_PLAYBACK_CAP_CELT_0_5_1);
-            int client_can_opus = red_channel_client_test_remote_cap(playback->base.channel_client,
+            int client_can_opus = red_channel_client_test_remote_cap(rcc,
                                     SPICE_PLAYBACK_CAP_OPUS);
             int desired_mode = snd_desired_audio_mode(on, now->frequency,
                                                       client_can_opus, client_can_celt);
@@ -1603,6 +1600,24 @@ void snd_set_playback_compression(int on)
     }
 }
 
+static void
+snd_channel_client_class_init(SndChannelClientClass *self)
+{
+}
+
+static void
+snd_channel_client_init(SndChannelClient *self)
+{
+}
+
+static void
+playback_channel_client_class_init(PlaybackChannelClientClass *klass)
+{
+    GObjectClass *object_class = G_OBJECT_CLASS(klass);
+    object_class->constructed = playback_channel_client_constructed;
+    object_class->finalize = playback_channel_client_finalize;
+}
+
 static void snd_playback_alloc_frames(PlaybackChannelClient *playback)
 {
     int i;
@@ -1614,3 +1629,24 @@ static void snd_playback_alloc_frames(PlaybackChannelClient *playback)
         snd_playback_free_frame(playback, &playback->frames->items[i]);
     }
 }
+
+static void
+playback_channel_client_init(PlaybackChannelClient *playback)
+{
+    playback->mode = SPICE_AUDIO_DATA_MODE_RAW;
+    snd_playback_alloc_frames(playback);
+}
+
+static void
+record_channel_client_class_init(RecordChannelClientClass *klass)
+{
+    GObjectClass *object_class = G_OBJECT_CLASS(klass);
+    object_class->constructed = record_channel_client_constructed;
+    object_class->finalize = record_channel_client_finalize;
+}
+
+static void
+record_channel_client_init(RecordChannelClient *record)
+{
+    record->mode = SPICE_AUDIO_DATA_MODE_RAW;
+}
-- 
2.9.3

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