/* * * BlueZ - Bluetooth protocol stack for Linux * * Copyright (C) 2004-2007 Marcel Holtmann * * * 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, write to the Free Software * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA * */ #ifdef HAVE_CONFIG_H #include #endif #include #include #include #include #include #include #include #include "ipc.h" #include "rtp.h" #include "gstsbcutil.h" #include "gsta2dpsink.h" enum { NOT_CONFIGURED, CONFIGURING_INIT, CONFIGURING_SENT_CONF, CONFIGURING_RCVD_DEV_CONF, CONFIGURED }; GST_DEBUG_CATEGORY_STATIC (a2dp_sink_debug); #define GST_CAT_DEFAULT a2dp_sink_debug #define BUFFER_SIZE 2048 #define GST_A2DP_SINK_MUTEX_LOCK(s) G_STMT_START { \ g_mutex_lock (s->sink_lock); \ } G_STMT_END #define GST_A2DP_SINK_MUTEX_UNLOCK(s) G_STMT_START { \ g_mutex_unlock (s->sink_lock); \ } G_STMT_END #define GST_A2DP_SINK_WAIT_CON_END(s) G_STMT_START { \ s->waiting_con_conf = TRUE; \ g_cond_wait (s->con_conf_end, s->sink_lock); \ s->waiting_con_conf = FALSE; \ } G_STMT_END #define GST_A2DP_SINK_CONFIGURATION_FAIL(s) G_STMT_START { \ s->con_state = NOT_CONFIGURED; \ g_cond_signal (s->con_conf_end); \ } G_STMT_END #define GST_A2DP_SINK_CONFIGURATION_SUCCESS(s) G_STMT_START { \ s->con_state = CONFIGURED; \ g_cond_signal (s->con_conf_end); \ } G_STMT_END struct bluetooth_data { struct ipc_data_cfg cfg; /* Bluetooth device config */ int samples; /* Number of encoded samples */ gchar buffer[BUFFER_SIZE]; /* Codec transfer buffer */ gsize count; /* Codec transfer buffer counter */ int nsamples; /* Cumulative number of codec samples */ uint16_t seq_num; /* Cumulative packet sequence */ int frame_count; /* Current frames in buffer */ }; #define IS_SBC(n) (strcmp((n), "audio/x-sbc") == 0) #define IS_MPEG(n) (strcmp((n), "audio/mpeg") == 0) enum { PROP_0, PROP_DEVICE, }; GST_BOILERPLATE (GstA2dpSink, gst_a2dp_sink, GstBaseSink, GST_TYPE_BASE_SINK); static const GstElementDetails a2dp_sink_details = GST_ELEMENT_DETAILS ("Bluetooth A2DP sink", "Sink/Audio", "Plays audio to an A2DP device", "Marcel Holtmann "); static GstStaticPadTemplate a2dp_sink_factory = GST_STATIC_PAD_TEMPLATE ("sink", GST_PAD_SINK, GST_PAD_ALWAYS, GST_STATIC_CAPS ("audio/x-sbc, " "rate = (int) { 16000, 32000, 44100, 48000 }, " "channels = (int) [ 1, 2 ], " "mode = (string) { mono, dual, stereo, joint }, " "blocks = (int) { 4, 8, 12, 16 }, " "subbands = (int) { 4, 8 }, " "allocation = (string) { snr, loudness }," "bitpool = (int) [ 2, 64 ]; " "audio/mpeg, " "mpegversion = (int) 1, " "layer = (int) [ 1, 3 ], " "rate = (int) { 16000, 22050, 24000, 32000, 44100, 48000 }, " "channels = (int) [ 1, 2 ]")); static void gst_a2dp_sink_base_init (gpointer g_class) { GstElementClass *element_class = GST_ELEMENT_CLASS (g_class); gst_element_class_add_pad_template (element_class, gst_static_pad_template_get (&a2dp_sink_factory)); gst_element_class_set_details (element_class, &a2dp_sink_details); } static gboolean gst_a2dp_sink_stop (GstBaseSink * basesink) { GstA2dpSink *self = GST_A2DP_SINK (basesink); GST_INFO_OBJECT (self, "stop"); self->con_state = NOT_CONFIGURED; if (self->watch_id != 0) { g_source_remove (self->watch_id); self->watch_id = 0; } if (self->stream) { g_io_channel_flush (self->stream, NULL); g_io_channel_close (self->stream); g_io_channel_unref (self->stream); self->stream = NULL; } if (self->server) { g_io_channel_close (self->server); g_io_channel_unref (self->server); self->server = NULL; } if (self->data) { g_free (self->data); self->data = NULL; } if (self->sbc) { g_free (self->sbc); self->sbc = NULL; } if (self->dev_caps) { gst_caps_unref (self->dev_caps); self->dev_caps = NULL; } return TRUE; } static void gst_a2dp_sink_finalize (GObject * object) { GstA2dpSink *self = GST_A2DP_SINK (object); if (self->data) gst_a2dp_sink_stop (GST_BASE_SINK (self)); if (self->device) g_free (self->device); /* unlock any thread waiting for this signal */ GST_A2DP_SINK_MUTEX_LOCK (self); GST_A2DP_SINK_CONFIGURATION_FAIL (self); GST_A2DP_SINK_MUTEX_UNLOCK (self); g_cond_free (self->con_conf_end); g_mutex_free (self->sink_lock); G_OBJECT_CLASS (parent_class)->finalize (object); } static void gst_a2dp_sink_set_property (GObject * object, guint prop_id, const GValue * value, GParamSpec * pspec) { GstA2dpSink *sink = GST_A2DP_SINK (object); switch (prop_id) { case PROP_DEVICE: if (sink->device) g_free (sink->device); sink->device = g_value_dup_string (value); break; default: G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec); break; } } static void gst_a2dp_sink_get_property (GObject * object, guint prop_id, GValue * value, GParamSpec * pspec) { GstA2dpSink *sink = GST_A2DP_SINK (object); switch (prop_id) { case PROP_DEVICE: g_value_set_string (value, sink->device); break; default: G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec); break; } } static gint gst_a2dp_sink_bluetooth_recvmsg_fd (GstA2dpSink * sink) { char cmsg_b[CMSG_SPACE (sizeof (int))], m; int err, ret, stream_fd; struct iovec iov = { &m, sizeof (m) }; struct msghdr msgh; struct cmsghdr *cmsg; memset (&msgh, 0, sizeof (msgh)); msgh.msg_iov = &iov; msgh.msg_iovlen = 1; msgh.msg_control = &cmsg_b; msgh.msg_controllen = CMSG_LEN (sizeof (int)); ret = recvmsg (g_io_channel_unix_get_fd (sink->server), &msgh, 0); if (ret < 0) { err = errno; GST_ERROR_OBJECT (sink, "Unable to receive fd: %s (%d)", strerror (err), err); return -err; } /* Receive auxiliary data in msgh */ for (cmsg = CMSG_FIRSTHDR (&msgh); cmsg != NULL; cmsg = CMSG_NXTHDR (&msgh, cmsg)) { if (cmsg->cmsg_level == SOL_SOCKET && cmsg->cmsg_type == SCM_RIGHTS) { stream_fd = (*(int *) CMSG_DATA (cmsg)); sink->stream = g_io_channel_unix_new (stream_fd); GST_DEBUG_OBJECT (sink, "stream_fd=%d", stream_fd); return 0; } } return -EINVAL; } static void gst_a2dp_sink_check_dev_caps (GstA2dpSink * self) { GstStructure *structure; GstCaps *dev_caps; gint channels; structure = gst_caps_get_structure (self->dev_caps, 0); if (!gst_structure_get_int (structure, "channels", &channels)) channels = 2; /* FIXME how to get channels */ dev_caps = gst_sbc_caps_from_sbc (&(self->data->cfg), self->sbc, channels); self->new_dev_caps = TRUE; gst_caps_unref (self->dev_caps); self->dev_caps = gst_caps_ref (dev_caps); } static int gst_a2dp_sink_bluetooth_a2dp_init (GstA2dpSink * self, struct ipc_codec_sbc *sbc) { struct bluetooth_data *data = self->data; struct ipc_data_cfg *cfg = &data->cfg; if (cfg == NULL) { GST_ERROR_OBJECT (self, "Error getting codec parameters"); return -1; } if (cfg->codec != CFG_CODEC_SBC) return -1; data->count = sizeof (struct rtp_header) + sizeof (struct rtp_payload); GST_DEBUG_OBJECT (self, "Codec parameters: " "\tallocation=%u\n\tsubbands=%u\n " "\tblocks=%u\n\tbitpool=%u\n", sbc->allocation, sbc->subbands, sbc->blocks, sbc->bitpool); return 0; } static gboolean gst_a2dp_sink_init_pkt_conf (GstA2dpSink * sink, GstCaps * caps, struct ipc_packet *pkt) { struct ipc_data_cfg *cfg = (void *) pkt->data; struct ipc_codec_sbc *sbc = (void *) cfg->data; const GValue *value = NULL; const char *pref, *name; GstStructure *structure = gst_caps_get_structure (caps, 0); name = gst_structure_get_name (structure); /* FIXME only sbc supported here, should suport mp3 */ if (!(IS_SBC (name))) { GST_ERROR_OBJECT (sink, "Unsupported format %s", name); return FALSE; } if (sink->device) strncpy (pkt->device, sink->device, 18); pkt->role = PKT_ROLE_HIFI; value = gst_structure_get_value (structure, "rate"); cfg->rate = g_value_get_int (value); value = gst_structure_get_value (structure, "mode"); pref = g_value_get_string (value); if (strcmp (pref, "auto") == 0) cfg->mode = CFG_MODE_AUTO; else if (strcmp (pref, "mono") == 0) cfg->mode = CFG_MODE_MONO; else if (strcmp (pref, "dual") == 0) cfg->mode = CFG_MODE_DUAL_CHANNEL; else if (strcmp (pref, "stereo") == 0) cfg->mode = CFG_MODE_STEREO; else if (strcmp (pref, "joint") == 0) cfg->mode = CFG_MODE_JOINT_STEREO; else { GST_ERROR_OBJECT (sink, "Invalid mode %s", pref); return FALSE; } value = gst_structure_get_value (structure, "allocation"); pref = g_value_get_string (value); if (strcmp (pref, "auto") == 0) sbc->allocation = CFG_ALLOCATION_AUTO; else if (strcmp (pref, "loudness") == 0) sbc->allocation = CFG_ALLOCATION_LOUDNESS; else if (strcmp (pref, "snr") == 0) sbc->allocation = CFG_ALLOCATION_SNR; else { GST_ERROR_OBJECT (sink, "Invalid allocation: %s", pref); return FALSE; } value = gst_structure_get_value (structure, "subbands"); sbc->subbands = g_value_get_int (value); value = gst_structure_get_value (structure, "blocks"); sbc->blocks = g_value_get_int (value); value = gst_structure_get_value (structure, "bitpool"); sbc->bitpool = g_value_get_int (value); pkt->length = sizeof (*cfg) + sizeof (*sbc); pkt->type = PKT_TYPE_CFG_REQ; pkt->error = PKT_ERROR_NONE; return TRUE; } static gboolean gst_a2dp_sink_conf_resp (GstA2dpSink * sink) { gchar buf[IPC_MTU]; GIOError io_error; gsize ret; gint total; struct ipc_packet *pkt = (void *) buf; struct ipc_data_cfg *cfg = (void *) pkt->data; struct ipc_codec_sbc *sbc = (void *) cfg->data; memset (buf, 0, sizeof (buf)); io_error = g_io_channel_read (sink->server, (gchar *) buf, sizeof (*pkt) + sizeof (*cfg), &ret); if (io_error != G_IO_ERROR_NONE && ret > 0) { GST_ERROR_OBJECT (sink, "Error ocurred while receiving " "configurarion packet answer"); return FALSE; } total = ret; if (pkt->type != PKT_TYPE_CFG_RSP) { GST_ERROR_OBJECT (sink, "Unexpected packet type %d " "received", pkt->type); return FALSE; } if (pkt->error != PKT_ERROR_NONE) { GST_ERROR_OBJECT (sink, "Error %d while configuring " "device", pkt->error); return FALSE; } if (cfg->codec != CFG_CODEC_SBC) { GST_ERROR_OBJECT (sink, "Unsupported format"); return FALSE; } io_error = g_io_channel_read (sink->server, (gchar *) sbc, sizeof (*sbc), &ret); if (io_error != G_IO_ERROR_NONE) { GST_ERROR_OBJECT (sink, "Error while reading data from socket " "%s (%d)", strerror (errno), errno); return FALSE; } else if (ret == 0) { GST_ERROR_OBJECT (sink, "Read 0 bytes from socket"); return FALSE; } total += ret; GST_DEBUG_OBJECT (sink, "OK - %d bytes received", total); if (pkt->length != (total - sizeof (struct ipc_packet))) { GST_ERROR_OBJECT (sink, "Error while configuring device: " "packet size doesn't match"); return FALSE; } memcpy (&sink->data->cfg, cfg, sizeof (*cfg)); memcpy (sink->sbc, sbc, sizeof (struct ipc_codec_sbc)); gst_a2dp_sink_check_dev_caps (sink); GST_DEBUG_OBJECT (sink, "Device configuration:\n\tchannel=%p\n\t" "fd_opt=%u\n\tpkt_len=%u\n\tsample_size=%u\n\trate=%u", sink->stream, sink->data->cfg.fd_opt, sink->data->cfg.pkt_len, sink->data->cfg.sample_size, sink->data->cfg.rate); if (sink->data->cfg.codec == CFG_CODEC_SBC) { /* FIXME is this necessary? */ ret = gst_a2dp_sink_bluetooth_a2dp_init (sink, sbc); if (ret < 0) return FALSE; } return TRUE; } static gboolean gst_a2dp_sink_conf_recv_stream_fd (GstA2dpSink * self) { struct bluetooth_data *data = self->data; gint ret; GIOError err; GError *gerr = NULL; GIOStatus status; GIOFlags flags; gsize read; ret = gst_a2dp_sink_bluetooth_recvmsg_fd (self); if (ret < 0) return FALSE; if (!self->stream) { GST_ERROR_OBJECT (self, "Error while configuring device: " "could not acquire audio socket"); return FALSE; } /* set stream socket to nonblock */ GST_LOG_OBJECT (self, "setting stream socket to nonblock"); flags = g_io_channel_get_flags (self->stream); flags |= G_IO_FLAG_NONBLOCK; status = g_io_channel_set_flags (self->stream, flags, &gerr); if (status != G_IO_STATUS_NORMAL) { if (gerr) GST_WARNING_OBJECT (self, "Error while " "setting server socket to nonblock: " "%s", gerr->message); else GST_WARNING_OBJECT (self, "Error while " "setting server " "socket to nonblock"); } /* It is possible there is some outstanding data in the pipe - we have to empty it */ GST_LOG_OBJECT (self, "emptying stream pipe"); while (1) { err = g_io_channel_read (self->stream, data->buffer, (gsize) data->cfg.pkt_len, &read); if (err != G_IO_ERROR_NONE || read <= 0) break; } /* set stream socket to block */ GST_LOG_OBJECT (self, "setting stream socket to block"); flags = g_io_channel_get_flags (self->stream); flags &= ~G_IO_FLAG_NONBLOCK; status = g_io_channel_set_flags (self->stream, flags, &gerr); if (status != G_IO_STATUS_NORMAL) { if (gerr) GST_WARNING_OBJECT (self, "Error while " "setting server socket to block:" "%s", gerr->message); else GST_WARNING_OBJECT (self, "Error while " "setting server " "socket to block"); } memset (data->buffer, 0, sizeof (data->buffer)); return TRUE; } static void gst_a2dp_sink_conf_recv_data (GstA2dpSink * sink) { /* * We hold the lock, since we can send a signal. * It is a good practice, according to the glib api. */ GST_A2DP_SINK_MUTEX_LOCK (sink); switch (sink->con_state) { case CONFIGURING_SENT_CONF: if (gst_a2dp_sink_conf_resp (sink)) sink->con_state = CONFIGURING_RCVD_DEV_CONF; else GST_A2DP_SINK_CONFIGURATION_FAIL (sink); break; case CONFIGURING_RCVD_DEV_CONF: if (gst_a2dp_sink_conf_recv_stream_fd (sink)) GST_A2DP_SINK_CONFIGURATION_SUCCESS (sink); else GST_A2DP_SINK_CONFIGURATION_FAIL (sink); break; } GST_A2DP_SINK_MUTEX_UNLOCK (sink); } static gboolean server_callback (GIOChannel * chan, GIOCondition cond, gpointer data) { GstA2dpSink *sink; if (cond & G_IO_HUP || cond & G_IO_NVAL) return FALSE; else if (cond & G_IO_ERR) { sink = GST_A2DP_SINK (data); GST_WARNING_OBJECT (sink, "Untreated callback G_IO_ERR"); } else if (cond & G_IO_IN) { sink = GST_A2DP_SINK (data); if (sink->con_state != NOT_CONFIGURED && sink->con_state != CONFIGURED) gst_a2dp_sink_conf_recv_data (sink); else GST_WARNING_OBJECT (sink, "Unexpected data received"); } else { sink = GST_A2DP_SINK (data); GST_WARNING_OBJECT (sink, "Unexpected callback call"); } return TRUE; } static gboolean gst_a2dp_sink_start (GstBaseSink * basesink) { GstA2dpSink *self = GST_A2DP_SINK (basesink); struct sockaddr_un addr = { AF_UNIX, IPC_SOCKET_NAME }; gint sk; gint err; GST_INFO_OBJECT (self, "start"); self->watch_id = 0; sk = socket (PF_LOCAL, SOCK_STREAM, 0); if (sk < 0) { err = errno; GST_ERROR_OBJECT (self, "Cannot open socket: %s (%d)", strerror (err), err); return FALSE; } if (connect (sk, (struct sockaddr *) &addr, sizeof (addr)) < 0) { err = errno; GST_ERROR_OBJECT (self, "Connection fail %s (%d)", strerror (err), err); close (sk); return FALSE; } self->server = g_io_channel_unix_new (sk); self->watch_id = g_io_add_watch (self->server, G_IO_IN | G_IO_HUP | G_IO_ERR | G_IO_NVAL, server_callback, self); self->data = g_new0 (struct bluetooth_data, 1); memset (self->data, 0, sizeof (struct bluetooth_data)); self->sbc = g_new0 (struct ipc_codec_sbc, 1); self->stream = NULL; self->con_state = NOT_CONFIGURED; self->new_dev_caps = FALSE; self->dev_caps = NULL; self->waiting_con_conf = FALSE; return TRUE; } static gboolean gst_a2dp_sink_send_conf_pkt (GstA2dpSink * sink, GstCaps * caps) { gchar buf[IPC_MTU]; struct ipc_packet *pkt = (void *) buf; gboolean ret; gsize bytes_sent; GIOError io_error; g_assert (sink->con_state == NOT_CONFIGURED); memset (pkt, 0, sizeof (buf)); ret = gst_a2dp_sink_init_pkt_conf (sink, caps, pkt); if (!ret) { GST_ERROR_OBJECT (sink, "Couldn't initialize parse caps " "to packet configuration"); return FALSE; } sink->con_state = CONFIGURING_INIT; io_error = g_io_channel_write (sink->server, (gchar *) pkt, sizeof (*pkt) + pkt->length, &bytes_sent); if (io_error != G_IO_ERROR_NONE) { GST_ERROR_OBJECT (sink, "Error ocurred while sending " "configurarion packet"); sink->con_state = NOT_CONFIGURED; return FALSE; } GST_DEBUG_OBJECT (sink, "%d bytes sent", bytes_sent); sink->con_state = CONFIGURING_SENT_CONF; return TRUE; } static gboolean gst_a2dp_sink_start_dev_conf (GstA2dpSink * sink, GstCaps * caps) { gboolean ret; g_assert (sink->con_state == NOT_CONFIGURED); GST_DEBUG_OBJECT (sink, "starting device configuration"); ret = gst_a2dp_sink_send_conf_pkt (sink, caps); return ret; } static GstFlowReturn gst_a2dp_sink_preroll (GstBaseSink * basesink, GstBuffer * buffer) { GstA2dpSink *sink = GST_A2DP_SINK (basesink); GST_A2DP_SINK_MUTEX_LOCK (sink); if (sink->con_state == NOT_CONFIGURED) gst_a2dp_sink_start_dev_conf (sink, GST_BUFFER_CAPS (buffer)); /* wait for the connection process to finish */ if (sink->con_state != CONFIGURED) GST_A2DP_SINK_WAIT_CON_END (sink); GST_A2DP_SINK_MUTEX_UNLOCK (sink); if (sink->con_state != CONFIGURED) return GST_FLOW_ERROR; return GST_FLOW_OK; } static int gst_a2dp_sink_avdtp_write (GstA2dpSink * self) { gsize ret; struct bluetooth_data *data = self->data; struct rtp_header *header; struct rtp_payload *payload; GIOError err; header = (void *) data->buffer; payload = (void *) (data->buffer + sizeof (*header)); memset (data->buffer, 0, sizeof (*header) + sizeof (*payload)); payload->frame_count = data->frame_count; header->v = 2; header->pt = 1; header->sequence_number = htons (data->seq_num); header->timestamp = htonl (data->nsamples); header->ssrc = htonl (1); err = g_io_channel_write (self->stream, data->buffer, data->count, &ret); if (err != G_IO_ERROR_NONE) { GST_ERROR_OBJECT (self, "Error while sending data"); ret = -1; } /* Reset buffer of data to send */ data->count = sizeof (struct rtp_header) + sizeof (struct rtp_payload); data->frame_count = 0; data->samples = 0; data->seq_num++; return ret; } static GstFlowReturn gst_a2dp_sink_render (GstBaseSink * basesink, GstBuffer * buffer) { GstA2dpSink *self = GST_A2DP_SINK (basesink); struct bluetooth_data *data = self->data; gint encoded; gint ret; encoded = GST_BUFFER_SIZE (buffer); if (data->count + encoded >= data->cfg.pkt_len) { ret = gst_a2dp_sink_avdtp_write (self); if (ret < 0) return GST_FLOW_ERROR; } memcpy (data->buffer + data->count, GST_BUFFER_DATA (buffer), encoded); data->count += encoded; data->frame_count++; return GST_FLOW_OK; } static gboolean gst_a2dp_sink_set_caps (GstBaseSink * basesink, GstCaps * caps) { GstA2dpSink *self = GST_A2DP_SINK (basesink); GST_A2DP_SINK_MUTEX_LOCK (self); if (self->con_state == NOT_CONFIGURED) { gst_a2dp_sink_start_dev_conf (self, caps); if (self->dev_caps) gst_caps_unref (self->dev_caps); self->dev_caps = gst_caps_ref (caps); /* we suppose the device will accept this caps */ self->new_dev_caps = FALSE; } GST_A2DP_SINK_MUTEX_UNLOCK (self); return TRUE; } static gboolean gst_a2dp_sink_unlock (GstBaseSink * basesink) { GstA2dpSink *self = GST_A2DP_SINK (basesink); if (self->stream != NULL) g_io_channel_flush (self->stream, NULL); return TRUE; } static GstFlowReturn gst_a2dp_sink_buffer_alloc (GstBaseSink * basesink, guint64 offset, guint size, GstCaps * caps, GstBuffer ** buf) { GstA2dpSink *self = GST_A2DP_SINK (basesink); *buf = gst_buffer_new_and_alloc (size); if (!(*buf)) { GST_ERROR_OBJECT (self, "buffer allocation failed"); return GST_FLOW_ERROR; } if (self->new_dev_caps && self->dev_caps) { GST_INFO_OBJECT (self, "new caps from device"); gst_buffer_set_caps (*buf, self->dev_caps); self->new_dev_caps = FALSE; } else gst_buffer_set_caps (*buf, caps); GST_BUFFER_OFFSET (*buf) = offset; return GST_FLOW_OK; } static void gst_a2dp_sink_class_init (GstA2dpSinkClass * klass) { GObjectClass *object_class = G_OBJECT_CLASS (klass); GstBaseSinkClass *basesink_class = GST_BASE_SINK_CLASS (klass); parent_class = g_type_class_peek_parent (klass); object_class->finalize = GST_DEBUG_FUNCPTR (gst_a2dp_sink_finalize); object_class->set_property = GST_DEBUG_FUNCPTR (gst_a2dp_sink_set_property); object_class->get_property = GST_DEBUG_FUNCPTR (gst_a2dp_sink_get_property); basesink_class->start = GST_DEBUG_FUNCPTR (gst_a2dp_sink_start); basesink_class->stop = GST_DEBUG_FUNCPTR (gst_a2dp_sink_stop); basesink_class->render = GST_DEBUG_FUNCPTR (gst_a2dp_sink_render); basesink_class->preroll = GST_DEBUG_FUNCPTR (gst_a2dp_sink_preroll); basesink_class->set_caps = GST_DEBUG_FUNCPTR (gst_a2dp_sink_set_caps); basesink_class->unlock = GST_DEBUG_FUNCPTR (gst_a2dp_sink_unlock); basesink_class->buffer_alloc = GST_DEBUG_FUNCPTR (gst_a2dp_sink_buffer_alloc); g_object_class_install_property (object_class, PROP_DEVICE, g_param_spec_string ("device", "Device", "Bluetooth remote device address", NULL, G_PARAM_READWRITE)); GST_DEBUG_CATEGORY_INIT (a2dp_sink_debug, "a2dpsink", 0, "A2DP sink element"); } static void gst_a2dp_sink_init (GstA2dpSink * self, GstA2dpSinkClass * klass) { self->device = NULL; self->data = NULL; self->sbc = NULL; self->stream = NULL; self->con_state = NOT_CONFIGURED; self->con_conf_end = g_cond_new (); self->waiting_con_conf = FALSE; self->sink_lock = g_mutex_new (); }