Build webrtcdsp gstreamer plugin with bad plugins

Certian gstreamer plugins are automatically disabled when the necessary
dependencies aren't available. The webrtcdsp plugin is one of these and
adding webrtc audio processing enables it to be built.

gvsbuild/projects/__init__.py

@@ -90,6 +90,7 @@
 from gvsbuild.projects.pycairo import Pycairo
 from gvsbuild.projects.pygobject import PyGObject
 from gvsbuild.projects.sqlite import SQLite
+from gvsbuild.projects.webrtc_audio_processing import WebrtcAudioProcessing
 from gvsbuild.projects.win_iconv import WinIconv
 from gvsbuild.projects.wing import Wing
 from gvsbuild.projects.x264 import X264

gvsbuild/projects/gstreamer.py

@@ -155,14 +155,22 @@ def __init__(self):
             lastversion_even=True,
             archive_url="https://gstreamer.freedesktop.org/src/gst-plugins-bad/gst-plugins-bad-{version}.tar.xz",
             hash="3029bfd7265314d609dc8eab503675a344ea46e8274fd73ab34566c8442dc847",
-            dependencies=["meson", "ninja", "gst-plugins-base"],
+            dependencies=[
+                "meson",
+                "ninja",
+                "gst-plugins-base",
+                "webrtc-audio-processing",
+            ],
             patches=[
                 "wasapisink-reduce-buffer-latency.patch",
             ],
         )
         self.add_param("-Dcurl=disabled")
         self.add_param("-Dcurl-ssh2=disabled")
 
+        # Adding webrtc-audio-processing adds the isac plugin. It fails to compile.
+        self.add_param("-Disac=disabled")
+
         if self.opts.enable_gi:
             self.add_dependency("gobject-introspection")
             enable_gi = "enabled"

gvsbuild/projects/webrtc_audio_processing.py

@@ -0,0 +1,24 @@
+from gvsbuild.utils.base_builders import Meson
+from gvsbuild.utils.base_expanders import Tarball
+from gvsbuild.utils.base_project import Project, project_add
+
+
+@project_add
+class WebrtcAudioProcessing(Tarball, Meson):
+    def __init__(self):
+        Project.__init__(
+            self,
+            "webrtc-audio-processing",
+            repository="https://gitlab.freedesktop.org/pulseaudio/webrtc-audio-processing/",
+            version="1.3",
+            archive_url="https://freedesktop.org/software/pulseaudio/webrtc-audio-processing/webrtc-audio-processing-{version}.tar.gz",
+            hash="95552fc17faa0202133707bbb3727e8c2cf64d4266fe31bfdb2298d769c1db75",
+            dependencies=["meson", "ninja"],
+        )
+
+    def build(self):
+        Meson.build(self)
+        self.install(r".\COPYING share\doc\webrtc-audio-processing")
+        self.install(
+            r".\webrtc\LICENSE .\webrtc\PATENTS share\doc\webrtc-audio-processing\webrtc"
+        )