webrtc-audio-processing: initial recipe

PulseAudio has multiple alternative echo canceller implementations.
Probably the best one is the "webrtc" echo canceller, which depends on
this library.

I added some patches to fix building on MIPS and PowerPC. The first
three patches are taken from upstream, the other three patches are my
own. I have only tested that the code builds on all architectures, not
that the code actually works.

Signed-off-by: Tanu Kaskinen <tanuk@iki.fi>
Signed-off-by: Martin Jansa <Martin.Jansa@gmail.com>

meta-multimedia/recipes-multimedia/webrtc-audio-processing/webrtc-audio-processing_0.3.bb

@@ -0,0 +1,25 @@
+DESCRIPTION = "Audio processing bits of the WebRTC reference implementation"
+HOMEPAGE = "https://www.freedesktop.org/software/pulseaudio/webrtc-audio-processing/"
+SECTION = "audio"
+
+LICENSE = "BSD-3-Clause"
+LIC_FILES_CHKSUM = "file://COPYING;md5=da08a38a32a340c5d91e13ee86a118f2 \
+                    file://webrtc/common.h;beginline=1;endline=9;md5=41f7322d91deabaf0acbbd0b8d0bc548 \
+"
+
+# Note that patch 3 effectively reverts patches 1 and 2. The only reason
+# why patches 1 and 2 are included is that otherwise patch 3 wouldn't
+# apply cleanly.
+SRC_URI = "http://freedesktop.org/software/pulseaudio/webrtc-audio-processing/${BP}.tar.xz \
+           file://0001-build-Protect-against-unsupported-CPU-types.patch \
+           file://0002-build-Add-ARM-64bit-support.patch \
+           file://0003-build-fix-architecture-detection.patch \
+           file://0004-typedefs.h-add-support-for-64-bit-and-big-endian-MIP.patch \
+           file://0005-typedefs.h-add-support-for-PowerPC.patch \
+           file://0006-common_audio-implement-endianness-conversion-in-wav-.patch \
+"
+
+SRC_URI[md5sum] = "336ae032f608e65808ac577cde0ab72c"
+SRC_URI[sha256sum] = "756e291d4f557d88cd50c4fe3b8454ec238362d22cedb3e6173240d90f0a80fa"
+
+inherit autotools