android/hal: Add HAL for A2DP Sink role

This role was introduced with some devices in Android 5. The same set
of IPC structs and defines is used as in Sink as it uses the same HAL
API as Source does, but just yet another instance of HAL.

1 files changed, 163 insertions, 0 deletions

diff --git a/android/hal-a2dp-sink.c b/android/hal-a2dp-sink.c
new file mode 100644
index 000000000..001b0224e
--- /dev/null
+++ b/android/hal-a2dp-sink.c
@@ -0,0 +1,163 @@
+/*
+ * Copyright (C) 2014 Intel Corporation
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ *
+ */
+
+#include <stdbool.h>
+#include <stddef.h>
+#include <string.h>
+
+#include "hal-log.h"
+#include "hal.h"
+#include "hal-msg.h"
+#include "hal-ipc.h"
+
+static const btav_callbacks_t *cbs = NULL;
+
+static bool interface_ready(void)
+{
+	return cbs != NULL;
+}
+
+static void handle_conn_state(void *buf, uint16_t len, int fd)
+{
+	struct hal_ev_a2dp_conn_state *ev = buf;
+
+	if (cbs->connection_state_cb)
+		cbs->connection_state_cb(ev->state,
+						(bt_bdaddr_t *) (ev->bdaddr));
+}
+
+static void handle_audio_state(void *buf, uint16_t len, int fd)
+{
+	struct hal_ev_a2dp_audio_state *ev = buf;
+
+	if (cbs->audio_state_cb)
+		cbs->audio_state_cb(ev->state, (bt_bdaddr_t *)(ev->bdaddr));
+}
+
+static void handle_audio_config(void *buf, uint16_t len, int fd)
+{
+	struct hal_ev_a2dp_audio_config *ev = buf;
+
+	if (cbs->audio_config_cb)
+		cbs->audio_config_cb((bt_bdaddr_t *)(ev->bdaddr),
+					ev->sample_rate, ev->channel_count);
+}
+
+/*
+ * handlers will be called from notification thread context,
+ * index in table equals to 'opcode - HAL_MINIMUM_EVENT'
+ */
+static const struct hal_ipc_handler ev_handlers[] = {
+	/* HAL_EV_A2DP_CONN_STATE */
+	{ handle_conn_state, false, sizeof(struct hal_ev_a2dp_conn_state) },
+	/* HAL_EV_A2DP_AUDIO_STATE */
+	{ handle_audio_state, false, sizeof(struct hal_ev_a2dp_audio_state) },
+	/* HAL_EV_A2DP_AUDIO_CONFIG */
+	{ handle_audio_config, false, sizeof(struct hal_ev_a2dp_audio_config) },
+};
+
+static bt_status_t a2dp_connect(bt_bdaddr_t *bd_addr)
+{
+	struct hal_cmd_a2dp_connect cmd;
+
+	DBG("");
+
+	if (!interface_ready())
+		return BT_STATUS_NOT_READY;
+
+	memcpy(cmd.bdaddr, bd_addr, sizeof(cmd.bdaddr));
+
+	return hal_ipc_cmd(HAL_SERVICE_ID_A2DP_SINK, HAL_OP_A2DP_CONNECT,
+					sizeof(cmd), &cmd, NULL, NULL, NULL);
+}
+
+static bt_status_t disconnect(bt_bdaddr_t *bd_addr)
+{
+	struct hal_cmd_a2dp_disconnect cmd;
+
+	DBG("");
+
+	if (!interface_ready())
+		return BT_STATUS_NOT_READY;
+
+	memcpy(cmd.bdaddr, bd_addr, sizeof(cmd.bdaddr));
+
+	return hal_ipc_cmd(HAL_SERVICE_ID_A2DP_SINK, HAL_OP_A2DP_DISCONNECT,
+					sizeof(cmd), &cmd, NULL, NULL, NULL);
+}
+
+static bt_status_t init(btav_callbacks_t *callbacks)
+{
+	struct hal_cmd_register_module cmd;
+	int ret;
+
+	DBG("");
+
+	if (interface_ready())
+		return BT_STATUS_DONE;
+
+	cbs = callbacks;
+
+	hal_ipc_register(HAL_SERVICE_ID_A2DP_SINK, ev_handlers,
+				sizeof(ev_handlers)/sizeof(ev_handlers[0]));
+
+	cmd.service_id = HAL_SERVICE_ID_A2DP_SINK;
+	cmd.mode = HAL_MODE_DEFAULT;
+	cmd.max_clients = 1;
+
+	ret = hal_ipc_cmd(HAL_SERVICE_ID_CORE, HAL_OP_REGISTER_MODULE,
+					sizeof(cmd), &cmd, NULL, NULL, NULL);
+
+	if (ret != BT_STATUS_SUCCESS) {
+		cbs = NULL;
+		hal_ipc_unregister(HAL_SERVICE_ID_A2DP_SINK);
+	}
+
+	return ret;
+}
+
+static void cleanup(void)
+{
+	struct hal_cmd_unregister_module cmd;
+
+	DBG("");
+
+	if (!interface_ready())
+		return;
+
+	cbs = NULL;
+
+	cmd.service_id = HAL_SERVICE_ID_A2DP_SINK;
+
+	hal_ipc_cmd(HAL_SERVICE_ID_CORE, HAL_OP_UNREGISTER_MODULE,
+					sizeof(cmd), &cmd, NULL, NULL, NULL);
+
+	hal_ipc_unregister(HAL_SERVICE_ID_A2DP_SINK);
+}
+
+static btav_interface_t iface = {
+	.size = sizeof(iface),
+	.init = init,
+	.connect = a2dp_connect,
+	.disconnect = disconnect,
+	.cleanup = cleanup
+};
+
+btav_interface_t *bt_get_a2dp_sink_interface(void)
+{
+	return &iface;
+}