#! /usr/bin/env python
# encoding: utf-8

import os

OPUS_CHECK='''#include <opus.h>
#include <stddef.h>
int main()
{
	OpusEncoder *oe = opus_encoder_create(48000, 2, OPUS_APPLICATION_VOIP, NULL);
	OpusDecoder *od = opus_decoder_create(48000, 2, NULL);
	return !oe || !od;
}
'''

def options(opt):
	pass

def configure(conf):
	if conf.check_pkg('opus', 'OPUS', OPUS_CHECK, fatal = False):
		conf.env.HAVE_OPUS = True
		return

	if not conf.path.find_dir('opus') or not conf.path.find_dir('opus/src'):
		conf.fatal('Can\'t find opus submodule. Run `git submodule update --init --recursive`.')
		return

	# TODO: ARM/x86 intrinsics detection
	# TODO: maybe call autotools/cmake/meson instead?

def build(bld):
	if bld.env.HAVE_OPUS:
		return

	sources = bld.path.ant_glob([
		'opus/src/*.c',
		'opus/celt/*.c',
		'opus/silk/*.c',
		'opus/silk/float/*.c'
	], excl = [
		'opus/src/repacketizer_demo.c',
		'opus/src/opus_demo.c',
		'opus/src/opus_compare.c',
		'opus/celt/opus_custom_demo.c'
	])
	includes = ['opus/include/', 'opus/celt/', 'opus/silk/', 'opus/silk/float/']
	defines = ['USE_ALLOCA', 'OPUS_BUILD', 'FLOAT_APPROX', 'PACKAGE_VERSION="1.3.1"']

	bld.stlib(
		source = sources,
		target = 'opus',
		features = 'c',
		includes = includes,
		defines = defines,
		subsystem = bld.env.MSVC_SUBSYSTEM,
		export_includes = ['opus/include/']
	)