[rhythmbox] build: put all of backends/ in a single library

[Jonathan Matthew <jmatthew src gnome org>]

commit a44c400ef03a6b33a8685b3ad2c66cc64b84bd32
Author: Jonathan Matthew <jonathan d14n org>
Date:   Tue May 24 23:09:58 2022 +1000

    build: put all of backends/ in a single library
    
    Neither half of this code is usable on its own, so it might as well be
    one library.

 backends/gstreamer/meson.build | 31 -------------------------------
 backends/meson.build           | 16 +++++++++-------
 meson.build                    |  2 +-
 shell/meson.build              |  4 +---
 4 files changed, 11 insertions(+), 42 deletions(-)
---
diff --git a/backends/meson.build b/backends/meson.build
index 0f0ec6bbd..c4dd11618 100644
--- a/backends/meson.build
+++ b/backends/meson.build
@@ -1,7 +1,3 @@
-backends_inc = include_directories('.')
-
-subdir('gstreamer')
-
 backends_headers = files(
   'rb-encoder.h',
   'rb-player.h',
@@ -16,6 +12,11 @@ backends_sources = files(
   'rb-player.c',
   'rb-player-gst-filter.c',
   'rb-player-gst-tee.c',
+
+  'gstreamer/rb-encoder-gst.c',
+  'gstreamer/rb-player-gst-helper.c',
+  'gstreamer/rb-player-gst.c',
+  'gstreamer/rb-player-gst-xfade.c',
 )
 
 backends_c_args = [
@@ -23,16 +24,17 @@ backends_c_args = [
   '-DG_LOG_DOMAIN="Rhythmbox"',
 ]
 
-backends_dependencies = [gstreamer_backend_dependencies]
+backends_dependencies = [gstreamer_base, gstreamer_controller, gstreamer_plugins_base, gstreamer_tag]
 
 rbbackends_lib = static_library('rbbackends',
   backends_sources,
-  dependencies: [librb_dep, rbbackendsgstreamer_dep],
+  dependencies: [backends_dependencies, librb_dep, rhythmdb_dep],
   c_args: backends_c_args,
+  include_directories: backendsinc,
 )
 
 rbbackends_dep = declare_dependency(
   link_with: rbbackends_lib,
   dependencies: backends_dependencies,
-  include_directories: include_directories('.'),
+  include_directories: backendsinc,
 )
diff --git a/meson.build b/meson.build
index b6cbc3ce7..1a7e739ed 100644
--- a/meson.build
+++ b/meson.build
@@ -267,7 +267,7 @@ libinc = include_directories('lib')
 mpidinc = include_directories('lib/libmediaplayerid')
 metadatainc = include_directories('metadata')
 rhythmdbinc = include_directories('rhythmdb')
-backendsinc = include_directories('backends')
+backendsinc = include_directories('backends', 'backends/gstreamer')
 pluginsinc = include_directories('plugins')
 podcastinc = include_directories('podcast')
 shellinc = include_directories('shell')
diff --git a/shell/meson.build b/shell/meson.build
index f7ee6bead..98e3a082e 100644
--- a/shell/meson.build
+++ b/shell/meson.build
@@ -108,8 +108,7 @@ librhythmbox_core = shared_library('rhythmbox-core',
 rhythmbox_core_dep = declare_dependency(
   link_with: librhythmbox_core,
   dependencies: [mpid_dependencies, lib_dependencies, rhythmdb_dependencies,
-    gstreamer_backend_dependencies, backends_dependencies,
-    podcast_dependencies, widgets_dependencies, sources_dependencies],
+    backends_dependencies, podcast_dependencies, widgets_dependencies, sources_dependencies],
   include_directories: rhythmbox_core_include_directories,
 )
 
@@ -119,7 +118,6 @@ rb_gir = gnome.generate_gir(librhythmbox_core,
   extra_args: [ '--accept-unprefixed'],
   sources: lib_headers + lib_sources + 
     backends_sources + backends_headers +
-    gstreamer_backend_sources + gstreamer_backend_headers +
     metadata_sources + metadata_headers +
     podcast_sources + podcast_headers +
     rhythmdb_sources + rhythmdb_headers +