Added codec2 as meson run time dependency when compiling for linux target, substituting the static library compiled from sources.

Stub input audio stream driver for linux x86/x64 platform.

meson.build

@@ -73,8 +73,14 @@ minmea_inc = ['lib/minmea/include']
 qdec_inc = ['lib/qdec/include']
 
 # CODEC2, open source speech codec
-codec2_proj = subproject('codec2')
-codec2_dep  = codec2_proj.get_variable('codec2_dep')
+# Compile from sources only when targeting a platform different from x86/x64
+if meson.is_cross_build()
+  codec2_proj = subproject('codec2')
+  codec2_dep  = codec2_proj.get_variable('codec2_dep')
+else
+  codec2_dep  = dependency('codec2')
+endif
+
 
 ##
 ## RTOS
@@ -212,6 +218,7 @@ linux_src = src + ['platform/targets/linux/emulator/emulator.c',
                    'platform/mcu/x86_64/drivers/rtc.c',
                    'platform/drivers/baseband/radio_linux.cpp',
                    'platform/drivers/audio/audio_linux.c',
+                   'platform/drivers/audio/inputStream_linux.c',
                    'platform/targets/linux/platform.c']
 
 
@@ -226,9 +233,9 @@ linux_inc = inc + ['platform/targets/linux',
 if not meson.is_cross_build()
   sdl_dep = dependency('SDL2')
   threads_dep = dependency('threads')
-  linux_dep = [sdl_dep, threads_dep]
+  linux_dep = [sdl_dep, threads_dep, codec2_dep]
 else
-  linux_dep = []
+  linux_dep = [ ]
 endif
 
 ##

platform/drivers/audio/inputStream_linux.c

@@ -0,0 +1,55 @@
+/***************************************************************************
+ *   Copyright (C) 2021 by Federico Amedeo Izzo IU2NUO,                    *
+ *                         Niccolò Izzo IU2KIN                             *
+ *                         Frederik Saraci IU2NRO                          *
+ *                         Silvano Seva IU2KWO                             *
+ *                                                                         *
+ *   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 3 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, see <http://www.gnu.org/licenses/>   *
+ ***************************************************************************/
+
+#include <interfaces/audio_stream.h>
+#include <hwconfig.h>
+#include <stddef.h>
+
+streamId inputStream_start(const enum AudioSource source,
+                           const enum AudioPriority prio,
+                           stream_sample_t * const buf,
+                           const size_t bufLength,
+                           const enum BufMode mode,
+                           const uint32_t sampleRate)
+{
+    (void) source;
+    (void) prio;
+    (void) buf;
+    (void) bufLength;
+    (void) mode;
+    (void) sampleRate;
+
+    return -1;
+}
+
+dataBlock_t inputStream_getData(streamId id)
+{
+    (void) id;
+
+    dataBlock_t block;
+    block.data = NULL;
+    block.len  = 0;
+    return block;
+}
+
+void inputStream_stop(streamId id)
+{
+    (void) id;
+}