Adds support for bluetooth audio through bluez-alsasandbox/tbultel/bluealsa

Implements a new bluealsa plugin to the HAL manager,
reacting to the changes of the available transports.
This plugin is linked with the new bluealsa.so shared
library.
New transports (SCO & A2DP) result in softmixer invocations
of the "attach" verb, that creates the new capture
(eg, A2DP capture from bluealsa ioplug PCM, SCO microphone
capture), playbacks (SCO playback to a softmixer zone,
and SCO output to bluealsa iogplug PCM).

When a transport disappears, the hal manager calls the
transaction deletion verb that will tell the softmixer
to remove the created streams and associated objects.

Signed-off-by: Thierry Bultel <thierry.bultel@iot.bzh>

1 files changed, 51 insertions, 0 deletions

diff --git a/plugins/lib/bluealsa/CMakeLists.txt b/plugins/lib/bluealsa/CMakeLists.txt
new file mode 100644
index 0000000..699ccc4
--- /dev/null
+++ b/plugins/lib/bluealsa/CMakeLists.txt
@@ -0,0 +1,51 @@
+###########################################################################
+# Copyright 2018 IoT.bzh
+#
+# author: Thierry Bultel <thierry.bultel@iot.bzh>
+#
+# 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.
+###########################################################################
+
+
+PROJECT_TARGET_ADD(hal-bluealsa)
+
+		pkg_check_modules(BLUEALSA REQUIRED bluealsa>=1.3.1)
+
+		# Define targets
+		ADD_LIBRARY(${TARGET_NAME} MODULE
+			    hal-bluealsa.c
+			    hal-bluealsa-transports.c
+			    )
+
+		# Alsa Plugin properties
+		SET_TARGET_PROPERTIES(${TARGET_NAME} PROPERTIES
+			LABELS "PLUGIN"
+			PREFIX ""
+			SUFFIX ".ctlso"
+			OUTPUT_NAME ${TARGET_NAME}
+		)
+
+		# Library dependencies (include updates automatically)
+		TARGET_LINK_LIBRARIES(${TARGET_NAME}
+			afb-helpers
+			ctl-utilities
+			${BLUEALSA_LIBRARIES}
+			${link_libraries}
+		)
+
+		TARGET_COMPILE_OPTIONS(${TARGET_NAME} PUBLIC ${BLUEALSA_CFLAGS})
+
+		target_include_directories(${TARGET_NAME}
+			PRIVATE "${CMAKE_SOURCE_DIR}/app-controller/ctl-lib"
+			PRIVATE "${CMAKE_SOURCE_DIR}/4a-hal/4a-hal-utilities"
+		)