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-rw-r--r--audio/sink.c563
1 files changed, 563 insertions, 0 deletions
diff --git a/audio/sink.c b/audio/sink.c
new file mode 100644
index 00000000..2af74bb3
--- /dev/null
+++ b/audio/sink.c
@@ -0,0 +1,563 @@
+/*
+ *
+ * BlueZ - Bluetooth protocol stack for Linux
+ *
+ * Copyright (C) 2006-2007 Nokia Corporation
+ * Copyright (C) 2004-2008 Marcel Holtmann <marcel@holtmann.org>
+ *
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program 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 General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
+ *
+ */
+
+#ifdef HAVE_CONFIG_H
+#include <config.h>
+#endif
+
+#include <stdint.h>
+#include <errno.h>
+
+#include <bluetooth/bluetooth.h>
+
+#include <glib.h>
+#include <dbus/dbus.h>
+#include <gdbus.h>
+
+#include "logging.h"
+
+#include "avdtp.h"
+#include "device.h"
+#include "a2dp.h"
+#include "error.h"
+#include "sink.h"
+
+#define STREAM_SETUP_RETRY_TIMER 2000
+
+struct pending_request {
+ DBusConnection *conn;
+ DBusMessage *msg;
+ unsigned int id;
+};
+
+struct sink {
+ struct avdtp *session;
+ struct avdtp_stream *stream;
+ unsigned int cb_id;
+ uint8_t state;
+ struct pending_request *connect;
+ struct pending_request *disconnect;
+ DBusConnection *conn;
+};
+
+static void pending_request_free(struct pending_request *pending)
+{
+ if (pending->conn)
+ dbus_connection_unref(pending->conn);
+ if (pending->msg)
+ dbus_message_unref(pending->msg);
+ g_free(pending);
+}
+
+static void stream_state_changed(struct avdtp_stream *stream,
+ avdtp_state_t old_state,
+ avdtp_state_t new_state,
+ struct avdtp_error *err,
+ void *user_data)
+{
+ struct audio_device *dev = user_data;
+ struct sink *sink = dev->sink;
+
+ if (err)
+ return;
+
+ switch (new_state) {
+ case AVDTP_STATE_IDLE:
+ g_dbus_emit_signal(dev->conn, dev->path,
+ AUDIO_SINK_INTERFACE,
+ "Disconnected",
+ DBUS_TYPE_INVALID);
+ if (sink->disconnect) {
+ DBusMessage *reply;
+ struct pending_request *p;
+
+ p = sink->disconnect;
+ sink->disconnect = NULL;
+
+ reply = dbus_message_new_method_return(p->msg);
+ dbus_connection_send(p->conn, reply, NULL);
+ dbus_message_unref(reply);
+ pending_request_free(p);
+ }
+
+ if (sink->session) {
+ avdtp_unref(sink->session);
+ sink->session = NULL;
+ }
+ sink->stream = NULL;
+ sink->cb_id = 0;
+ break;
+ case AVDTP_STATE_OPEN:
+ if (old_state == AVDTP_STATE_CONFIGURED)
+ g_dbus_emit_signal(dev->conn, dev->path,
+ AUDIO_SINK_INTERFACE,
+ "Connected",
+ DBUS_TYPE_INVALID);
+ else if (old_state == AVDTP_STATE_STREAMING)
+ g_dbus_emit_signal(dev->conn, dev->path,
+ AUDIO_SINK_INTERFACE,
+ "Stopped",
+ DBUS_TYPE_INVALID);
+ break;
+ case AVDTP_STATE_STREAMING:
+ g_dbus_emit_signal(dev->conn, dev->path,
+ AUDIO_SINK_INTERFACE,
+ "Playing",
+ DBUS_TYPE_INVALID);
+ break;
+ case AVDTP_STATE_CONFIGURED:
+ case AVDTP_STATE_CLOSING:
+ case AVDTP_STATE_ABORTING:
+ default:
+ break;
+ }
+
+ sink->state = new_state;
+}
+
+static gboolean stream_setup_retry(gpointer user_data)
+{
+ struct sink *sink = user_data;
+ struct pending_request *pending = sink->connect;
+
+ if (sink->state >= AVDTP_STATE_OPEN) {
+ DBusMessage *reply;
+ debug("Stream successfully created, after XCASE connect:connect");
+ reply = dbus_message_new_method_return(pending->msg);
+ dbus_connection_send(pending->conn, reply, NULL);
+ dbus_message_unref(reply);
+ } else {
+ debug("Stream setup failed, after XCASE connect:connect");
+ error_failed(pending->conn, pending->msg, "Stream setup failed");
+ }
+
+ sink->connect = NULL;
+ pending_request_free(pending);
+
+ return FALSE;
+}
+
+static void stream_setup_complete(struct avdtp *session, struct a2dp_sep *sep,
+ struct avdtp_stream *stream,
+ struct avdtp_error *err, void *user_data)
+{
+ struct sink *sink = user_data;
+ struct pending_request *pending;
+
+ pending = sink->connect;
+
+ if (stream) {
+ DBusMessage *reply;
+ sink->connect = NULL;
+ reply = dbus_message_new_method_return(pending->msg);
+ dbus_connection_send(pending->conn, reply, NULL);
+ dbus_message_unref(reply);
+ pending_request_free(pending);
+ debug("Stream successfully created");
+ } else {
+ avdtp_unref(sink->session);
+ sink->session = NULL;
+ if (avdtp_error_type(err) == AVDTP_ERROR_ERRNO
+ && avdtp_error_posix_errno(err) != EHOSTDOWN) {
+ debug("connect:connect XCASE detected");
+ g_timeout_add(STREAM_SETUP_RETRY_TIMER,
+ stream_setup_retry, sink);
+ } else {
+ sink->connect = NULL;
+ error_failed(pending->conn, pending->msg, "Stream setup failed");
+ pending_request_free(pending);
+ debug("Stream setup failed : %s", avdtp_strerror(err));
+ }
+ }
+}
+
+static uint8_t default_bitpool(uint8_t freq, uint8_t mode)
+{
+ switch (freq) {
+ case SBC_SAMPLING_FREQ_16000:
+ case SBC_SAMPLING_FREQ_32000:
+ return 53;
+ case SBC_SAMPLING_FREQ_44100:
+ switch (mode) {
+ case SBC_CHANNEL_MODE_MONO:
+ case SBC_CHANNEL_MODE_DUAL_CHANNEL:
+ return 31;
+ case SBC_CHANNEL_MODE_STEREO:
+ case SBC_CHANNEL_MODE_JOINT_STEREO:
+ return 53;
+ default:
+ error("Invalid channel mode %u", mode);
+ return 53;
+ }
+ case SBC_SAMPLING_FREQ_48000:
+ switch (mode) {
+ case SBC_CHANNEL_MODE_MONO:
+ case SBC_CHANNEL_MODE_DUAL_CHANNEL:
+ return 29;
+ case SBC_CHANNEL_MODE_STEREO:
+ case SBC_CHANNEL_MODE_JOINT_STEREO:
+ return 51;
+ default:
+ error("Invalid channel mode %u", mode);
+ return 51;
+ }
+ default:
+ error("Invalid sampling freq %u", freq);
+ return 53;
+ }
+}
+
+static gboolean select_sbc_params(struct sbc_codec_cap *cap,
+ struct sbc_codec_cap *supported)
+{
+ unsigned int max_bitpool, min_bitpool;
+
+ memset(cap, 0, sizeof(struct sbc_codec_cap));
+
+ cap->cap.media_type = AVDTP_MEDIA_TYPE_AUDIO;
+ cap->cap.media_codec_type = A2DP_CODEC_SBC;
+
+ if (supported->frequency & SBC_SAMPLING_FREQ_44100)
+ cap->frequency = SBC_SAMPLING_FREQ_44100;
+ else if (supported->frequency & SBC_SAMPLING_FREQ_48000)
+ cap->frequency = SBC_SAMPLING_FREQ_48000;
+ else if (supported->frequency & SBC_SAMPLING_FREQ_32000)
+ cap->frequency = SBC_SAMPLING_FREQ_32000;
+ else if (supported->frequency & SBC_SAMPLING_FREQ_16000)
+ cap->frequency = SBC_SAMPLING_FREQ_16000;
+ else {
+ error("No supported frequencies");
+ return FALSE;
+ }
+
+ if (supported->channel_mode & SBC_CHANNEL_MODE_JOINT_STEREO)
+ cap->channel_mode = SBC_CHANNEL_MODE_JOINT_STEREO;
+ else if (supported->channel_mode & SBC_CHANNEL_MODE_STEREO)
+ cap->channel_mode = SBC_CHANNEL_MODE_STEREO;
+ else if (supported->channel_mode & SBC_CHANNEL_MODE_DUAL_CHANNEL)
+ cap->channel_mode = SBC_CHANNEL_MODE_DUAL_CHANNEL;
+ else if (supported->channel_mode & SBC_CHANNEL_MODE_MONO)
+ cap->channel_mode = SBC_CHANNEL_MODE_MONO;
+ else {
+ error("No supported channel modes");
+ return FALSE;
+ }
+
+ if (supported->block_length & SBC_BLOCK_LENGTH_16)
+ cap->block_length = SBC_BLOCK_LENGTH_16;
+ else if (supported->block_length & SBC_BLOCK_LENGTH_12)
+ cap->block_length = SBC_BLOCK_LENGTH_12;
+ else if (supported->block_length & SBC_BLOCK_LENGTH_8)
+ cap->block_length = SBC_BLOCK_LENGTH_8;
+ else if (supported->block_length & SBC_BLOCK_LENGTH_4)
+ cap->block_length = SBC_BLOCK_LENGTH_4;
+ else {
+ error("No supported block lengths");
+ return FALSE;
+ }
+
+ if (supported->subbands & SBC_SUBBANDS_8)
+ cap->subbands = SBC_SUBBANDS_8;
+ else if (supported->subbands & SBC_SUBBANDS_4)
+ cap->subbands = SBC_SUBBANDS_4;
+ else {
+ error("No supported subbands");
+ return FALSE;
+ }
+
+ if (supported->allocation_method & SBC_ALLOCATION_LOUDNESS)
+ cap->allocation_method = SBC_ALLOCATION_LOUDNESS;
+ else if (supported->allocation_method & SBC_ALLOCATION_SNR)
+ cap->allocation_method = SBC_ALLOCATION_SNR;
+
+ min_bitpool = MAX(MIN_BITPOOL, supported->min_bitpool);
+ max_bitpool = MIN(default_bitpool(cap->frequency, cap->channel_mode),
+ supported->max_bitpool);
+
+ cap->min_bitpool = min_bitpool;
+ cap->max_bitpool = max_bitpool;
+
+ return TRUE;
+}
+
+static gboolean select_capabilities(struct avdtp *session,
+ struct avdtp_remote_sep *rsep,
+ GSList **caps)
+{
+ struct avdtp_service_capability *media_transport, *media_codec;
+ struct sbc_codec_cap sbc_cap;
+
+ media_codec = avdtp_get_codec(rsep);
+ if (!media_codec)
+ return FALSE;
+
+ select_sbc_params(&sbc_cap, (struct sbc_codec_cap *) media_codec->data);
+
+ media_transport = avdtp_service_cap_new(AVDTP_MEDIA_TRANSPORT,
+ NULL, 0);
+
+ *caps = g_slist_append(*caps, media_transport);
+
+ media_codec = avdtp_service_cap_new(AVDTP_MEDIA_CODEC, &sbc_cap,
+ sizeof(sbc_cap));
+
+ *caps = g_slist_append(*caps, media_codec);
+
+
+ return TRUE;
+}
+
+static void discovery_complete(struct avdtp *session, GSList *seps, struct avdtp_error *err,
+ void *user_data)
+{
+ struct sink *sink = user_data;
+ struct pending_request *pending;
+ struct avdtp_local_sep *lsep;
+ struct avdtp_remote_sep *rsep;
+ GSList *caps = NULL;
+ int id;
+
+ pending = sink->connect;
+
+ if (err) {
+ avdtp_unref(sink->session);
+ sink->session = NULL;
+ if (avdtp_error_type(err) == AVDTP_ERROR_ERRNO
+ && avdtp_error_posix_errno(err) != EHOSTDOWN) {
+ debug("connect:connect XCASE detected");
+ g_timeout_add(STREAM_SETUP_RETRY_TIMER,
+ stream_setup_retry, sink);
+ } else
+ goto failed;
+ return;
+ }
+
+ debug("Discovery complete");
+
+ if (avdtp_get_seps(session, AVDTP_SEP_TYPE_SINK, AVDTP_MEDIA_TYPE_AUDIO,
+ A2DP_CODEC_SBC, &lsep, &rsep) < 0) {
+ error("No matching ACP and INT SEPs found");
+ goto failed;
+ }
+
+ if (!select_capabilities(session, rsep, &caps)) {
+ error("Unable to select remote SEP capabilities");
+ goto failed;
+ }
+
+ id = a2dp_source_config(sink->session, stream_setup_complete,
+ caps, sink);
+ if (id == 0)
+ goto failed;
+
+ pending->id = id;
+ return;
+
+failed:
+ pending_request_free(pending);
+ sink->connect = NULL;
+ avdtp_unref(sink->session);
+ sink->session = NULL;
+ error_failed(pending->conn, pending->msg, "Stream setup failed");
+}
+
+static DBusMessage *sink_connect(DBusConnection *conn,
+ DBusMessage *msg, void *data)
+{
+ struct audio_device *dev = data;
+ struct sink *sink = dev->sink;
+ struct pending_request *pending;
+
+ if (!sink->session)
+ sink->session = avdtp_get(&dev->src, &dev->dst);
+
+ if (!sink->session)
+ return g_dbus_create_error(msg, ERROR_INTERFACE ".Failed",
+ "Unable to get a session");
+
+ if (sink->connect || sink->disconnect)
+ return g_dbus_create_error(msg, ERROR_INTERFACE ".Failed",
+ "%s", strerror(EBUSY));
+
+ if (sink->state >= AVDTP_STATE_OPEN)
+ return g_dbus_create_error(msg, ERROR_INTERFACE
+ ".AlreadyConnected",
+ "Device Already Connected");
+
+ pending = g_new0(struct pending_request, 1);
+ pending->conn = dbus_connection_ref(conn);
+ pending->msg = dbus_message_ref(msg);
+ sink->connect = pending;
+
+ avdtp_discover(sink->session, discovery_complete, sink);
+
+ debug("stream creation in progress");
+
+ return NULL;
+}
+
+static DBusMessage *sink_disconnect(DBusConnection *conn,
+ DBusMessage *msg, void *data)
+{
+ struct audio_device *device = data;
+ struct sink *sink = device->sink;
+ struct pending_request *pending;
+ int err;
+
+ if (!sink->session)
+ return g_dbus_create_error(msg, ERROR_INTERFACE
+ ".NotConnected",
+ "Device not Connected");
+
+ if (sink->connect || sink->disconnect)
+ return g_dbus_create_error(msg, ERROR_INTERFACE ".Failed",
+ "%s", strerror(EBUSY));
+
+ if (sink->state < AVDTP_STATE_OPEN) {
+ DBusMessage *reply = dbus_message_new_method_return(msg);
+ if (!reply)
+ return NULL;
+ avdtp_unref(sink->session);
+ sink->session = NULL;
+ return reply;
+ }
+
+ err = avdtp_close(sink->session, sink->stream);
+ if (err < 0)
+ return g_dbus_create_error(msg, ERROR_INTERFACE ".Failed",
+ "%s", strerror(-err));
+
+ pending = g_new0(struct pending_request, 1);
+ pending->conn = dbus_connection_ref(conn);
+ pending->msg = dbus_message_ref(msg);
+ sink->disconnect = pending;
+
+ return NULL;
+}
+
+static DBusMessage *sink_is_connected(DBusConnection *conn,
+ DBusMessage *msg,
+ void *data)
+{
+ struct audio_device *device = data;
+ struct sink *sink = device->sink;
+ DBusMessage *reply;
+ dbus_bool_t connected;
+
+ reply = dbus_message_new_method_return(msg);
+ if (!reply)
+ return NULL;
+
+ connected = (sink->state >= AVDTP_STATE_CONFIGURED);
+
+ dbus_message_append_args(reply, DBUS_TYPE_BOOLEAN, &connected,
+ DBUS_TYPE_INVALID);
+
+ return reply;
+}
+
+static GDBusMethodTable sink_methods[] = {
+ { "Connect", "", "", sink_connect,
+ G_DBUS_METHOD_FLAG_ASYNC },
+ { "Disconnect", "", "", sink_disconnect,
+ G_DBUS_METHOD_FLAG_ASYNC },
+ { "IsConnected", "", "b", sink_is_connected },
+ { NULL, NULL, NULL, NULL }
+};
+
+static GDBusSignalTable sink_signals[] = {
+ { "Connected", "" },
+ { "Disconnected", "" },
+ { "Playing", "" },
+ { "Stopped", "" },
+ { NULL, NULL }
+};
+
+struct sink *sink_init(struct audio_device *dev)
+{
+ if (!g_dbus_register_interface(dev->conn, dev->path,
+ AUDIO_SINK_INTERFACE,
+ sink_methods, sink_signals, NULL,
+ dev, NULL))
+ return NULL;
+
+ return g_new0(struct sink, 1);
+}
+
+void sink_free(struct audio_device *dev)
+{
+ struct sink *sink = dev->sink;
+
+ if (sink->cb_id)
+ avdtp_stream_remove_cb(sink->session, sink->stream,
+ sink->cb_id);
+
+ if (sink->session)
+ avdtp_unref(sink->session);
+
+ if (sink->connect)
+ pending_request_free(sink->connect);
+
+ if (sink->disconnect)
+ pending_request_free(sink->disconnect);
+
+ g_free(sink);
+ dev->sink = NULL;
+}
+
+gboolean sink_is_active(struct audio_device *dev)
+{
+ struct sink *sink = dev->sink;
+
+ if (sink->session)
+ return TRUE;
+
+ return FALSE;
+}
+
+avdtp_state_t sink_get_state(struct audio_device *dev)
+{
+ struct sink *sink = dev->sink;
+
+ return sink->state;
+}
+
+gboolean sink_new_stream(struct audio_device *dev, struct avdtp *session,
+ struct avdtp_stream *stream)
+{
+ struct sink *sink = dev->sink;
+
+ if (sink->stream)
+ return FALSE;
+
+ if (!sink->session)
+ sink->session = avdtp_ref(session);
+
+ sink->stream = stream;
+
+ sink->cb_id = avdtp_stream_add_cb(session, stream,
+ stream_state_changed, dev);
+
+ return TRUE;
+}
generated by cgit (git 2.34.1) at 2025-11-04 06:23:39 +0000