Tvheadend

Hello!

I bought a LG OLED TV a few days ago and after learning about the RootMyTV stuff, I can now do whatever I want with it. Since the v4l and TV drivers are all present, I decided to try my hand at cross-compiling TVH to see where it'd lead me.

Problem is, I have been fighting with the build tool the past few days but there are so many little problems... But, they all seem to come from Makefile.ffmpeg.

Here's what I figured out so far:

1.

CC

is not respected in

.config.mk

and needs to manually be overridden when invoking Make.
2. FFMPEG's configure script isn't given any flags for cross compilation; I had to manually patch the Makefile to add that; mainly

--host=arm-webos-linux-gnueabi

3. Not TVH's buildsystem fault, but during the build,

$(HOST)-as

is invoked with

-D...

flags. That won't do, because this is used to generate debug output (

-D produce assembler debugging messages

).
4. CMake options to

x265_3.5

can also not be passed. Now, CMake itself should be smart enough to figure out that this is a cross-compile toolchain - and yet, it still attempted to compile for

-march=i686

... so I'd somehow need to adjust that, too.

This is as far as I have gotten so far.

My configure invocation:

env CFLAGS="$CFLAGS -I/opt/webos-sdk-x86_64/1.0.g/extra/include" LDFLAGS="$LDFLAGS -L/opt/webos-sdk-x86_64/1.0.g/extra/lib" ./configure --host=arm-webos-linux-gnueabi --prefix=/opt/webos-sdk-x86_64/1.0.g/extra

I set

AS=arm-webos-linux-gnueabi-gcc

and used make like so:

make COMPILER="$CC" FFMPEG_HOST="arm-webos-linux-gnueabi" FFMPEG_CONFIGURE_FLAGS="--host=arm-webos-linux-gnueabi"

And patched Makefile.ffmpeg like this:

diff --git a/Makefile.ffmpeg b/Makefile.ffmpeg
index 94f6e977a..5204239ca 100644
--- a/Makefile.ffmpeg
+++ b/Makefile.ffmpeg
@@ -174,7 +174,8 @@ AUTOGEN   := ./autogen.sh

 CONFIGURE := FFMPEG_PREFIX=$(EPREFIX) \
              PKG_CONFIG=$(ROOTDIR)/support/pkg-config.ffmpeg \
-             ./configure --prefix=/ffmpeg --enable-static --disable-shared
+             ./configure --prefix=/ffmpeg --enable-static --disable-shared \
+             $(FFMPEG_CONFIGURE_FLAGS)
 CONFIGURE_PI := CC="$(COMPILER) $(CFLAGS_PI)" $(CONFIGURE)
 CONFIGURE_FFMPEG := $(CONFIGURE)

@@ -231,7 +232,6 @@ $(LIB_ROOT)/$(LIBX264)/.tvh_build: \
                $(LIB_ROOT)/$(NASM)/.tvh_build \
                $(LIB_ROOT)/$(LIBX264)/.tvh_download
        cd $(LIB_ROOT)/$(LIBX264) && $(CONFIGURE) \
-               --extra-asflags="-DPIC" \
                --extra-cflags="$(CFLAGS_PI)" \
                --disable-cli \
                --disable-swscale \

(The removal of -DPIC was an earlier attempt to work around the assembler issues untill I realized I could just re-define $AS to be GCC).

Do you have any ideas how I can improve on this? Or how I can work around the other problems?

I honestly don't even know how far TVH will be able to go when installed to a TV; but I do see stuff in /dev/dvb so I am curious to try :)

root@LGwebOSTV:/dev/dvb# pwd
/dev/dvb
root@LGwebOSTV:/dev/dvb# ls
adapter0

Kind regards,
Ingwie