Add support for LHDC V3 A2DP source and sink

.github/spellcheck-wordlist.txt

@@ -2,6 +2,7 @@
 AAC
 ABR
 ADDR
+AOSP
 AVRCP
 BLE
 BT

configure.ac

@@ -226,6 +226,15 @@ AM_COND_IF([ENABLE_MIDI], [
 	AC_DEFINE([ENABLE_MIDI], [1], [Define to 1 if Bluetooth LE MIDI is enabled.])
 ])
 
+AC_ARG_ENABLE([lhdc],
+	[AS_HELP_STRING([--enable-lhdc], [enable LHDC support])])
+AM_CONDITIONAL([ENABLE_LHDC], [test "x$enable_lhdc" = "xyes"])
+AM_COND_IF([ENABLE_LHDC], [
+	AC_DEFINE([ENABLE_LHDC], [1], [Define to 1 if LHDC is enabled.])
+	PKG_CHECK_MODULES([LHDC_DEC], [ldhcBT-dec >= 4.0.2])
+	PKG_CHECK_MODULES([LHDC_ENC], [lhdcBT-enc >= 4.0.6])
+])
+
 AC_ARG_ENABLE([mp3lame],
 	[AS_HELP_STRING([--enable-mp3lame], [enable MP3 support])])
 AM_CONDITIONAL([ENABLE_MP3LAME], [test "x$enable_mp3lame" = "xyes"])

src/Makefile.am

@@ -98,6 +98,11 @@ bluealsa_SOURCES += \
 	midi.c
 endif
 
+if ENABLE_LHDC
+bluealsa_SOURCES += \
+	a2dp-lhdc.c
+endif
+
 if ENABLE_MPEG
 bluealsa_SOURCES += \
 	a2dp-mpeg.c
@@ -132,6 +137,8 @@ AM_CFLAGS = \
 	@LDAC_ABR_CFLAGS@ \
 	@LDAC_DEC_CFLAGS@ \
 	@LDAC_ENC_CFLAGS@ \
+	@LHDC_DEC_CFLAGS@ \
+	@LHDC_ENC_CFLAGS@ \
 	@LIBBSD_CFLAGS@ \
 	@LIBUNWIND_CFLAGS@ \
 	@MPG123_CFLAGS@ \
@@ -151,6 +158,8 @@ LDADD = \
 	@LDAC_ABR_LIBS@ \
 	@LDAC_DEC_LIBS@ \
 	@LDAC_ENC_LIBS@ \
+	@LHDC_DEC_LIBS@ \
+	@LHDC_ENC_LIBS@ \
 	@LIBUNWIND_LIBS@ \
 	@MP3LAME_LIBS@ \
 	@MPG123_LIBS@ \