#!/usr/bin/env python
from waflib.extras import autowaf as autowaf

# Version of this package (even if built as a child)
QM_DSP_VERSION = '1.7.1'

# Library version (UNIX style major, minor, micro)
# major increment <=> incompatible changes
# minor increment <=> compatible changes (additions)
# micro increment <=> no interface changes
QM_DSP_LIB_VERSION = '1.7.1'

def options(opt):
    pass

def configure(conf):
    if conf.is_defined('USE_EXTERNAL_LIBS'):
        conf.check_cxx(header_name="base/Pitch.h", mandatory=True, msg="Checking for qm-dsp headers")
        conf.check_cxx(lib="qm-dsp", uselib_store="QMDSP", mandatory=True)

        # Verify that qm-dsp is self-contained and that FFT transforms actually works
        if not conf.check_cxx(msg = 'Checking qm-dsp without explicit kiss linking',
                              features = 'cxx cxxprogram',
                              fragment = """#include "dsp/transforms/FFT.h"\nint main(void) {\nFFT(4).process(false, nullptr, 0, nullptr, nullptr);\nFFTReal(4).forward(nullptr, nullptr, nullptr);\nreturn 0;\n}""",
                              uselib = 'QMDSP',
                              okmsg = 'ok',
                              errmsg = "-lqm-dsp by itself failed",
                              mandatory = False,
                              ):
            # The external qm-dsp might be built without embedded kiss - try to link with it explicitly and check again
            if conf.check_cxx(lib="kissfft-double", uselib_store="KISSFFT", mandatory=False):
                # kissfft ersions >= 130 have changed names (kiss_fft_double -> kissfft-double) and
                # library organization
                conf.env.append_value('LIB_QMDSP', conf.env['LIB_KISSFFT'])
            else:
                # kiss_fft <= 1.3.x
                conf.check_cxx(lib="kiss_fft_double", uselib_store="KISS_FFT", mandatory=True)
                conf.check_cxx(lib="kiss_fftr_double", uselib_store="KISS_FFTR", mandatory=True)
                conf.env.append_value('LIB_QMDSP', conf.env['LIB_KISS_FFT'] + conf.env['LIB_KISS_FFTR'])

            conf.check_cxx(msg = 'Checking qm-dsp with explicit kiss linking',
                           features = 'cxx cxxprogram',
                           fragment = """#include "dsp/transforms/FFT.h"\nint main(void) {\nFFT(4).process(false, nullptr, 0, nullptr, nullptr);\nFFTReal(4).forward(nullptr, nullptr, nullptr);\nreturn 0;\n}""",
                           uselib = 'QMDSP',
                           okmsg = '-lqm-dsp needs explicit kiss linking',
                           errmsg = "qm-dsp doesn't work, even with kiss libraries",
                           mandatory = True,
                           )

def build(bld):
    if bld.is_defined('USE_EXTERNAL_LIBS'):
        return

    # Host Library
    obj = bld(features = 'c cxx cxxstlib')
    obj.source = '''
            base/Pitch.cpp
            base/KaiserWindow.cpp
            base/SincWindow.cpp
            dsp/chromagram/Chromagram.cpp
            dsp/chromagram/ConstantQ.cpp
            dsp/keydetection/GetKeyMode.cpp
            dsp/mfcc/MFCC.cpp
            dsp/onsets/DetectionFunction.cpp
            dsp/onsets/PeakPicking.cpp
            dsp/phasevocoder/PhaseVocoder.cpp
            dsp/rateconversion/Decimator.cpp
            dsp/rateconversion/DecimatorB.cpp
            dsp/rhythm/BeatSpectrum.cpp
            dsp/signalconditioning/DFProcess.cpp
            dsp/signalconditioning/Filter.cpp
            dsp/signalconditioning/FiltFilt.cpp
            dsp/signalconditioning/Framer.cpp
            dsp/tempotracking/DownBeat.cpp
            dsp/tempotracking/TempoTrack.cpp
            dsp/tempotracking/TempoTrackV2.cpp
            dsp/tonal/ChangeDetectionFunction.cpp
            dsp/tonal/TCSgram.cpp
            dsp/tonal/TonalEstimator.cpp
            dsp/transforms/FFT.cpp
            dsp/wavelet/Wavelet.cpp
            maths/Correlation.cpp
            maths/CosineDistance.cpp
            maths/KLDivergence.cpp
            maths/MathUtilities.cpp
            maths/pca/pca.c
            ext/kissfft/kiss_fft.c
            ext/kissfft/tools/kiss_fftr.c
    '''
    autowaf.ensure_visible_symbols (obj, False)
    obj.export_includes = ['.']
    obj.includes     = ['.', 'ext/kissfft', 'ext/kissfft/tools/']
    obj.defines      = ['kiss_fft_scalar=double']
    obj.name         = 'libqm-dsp'
    obj.target       = 'qm-dsp'
    obj.vnum         = QM_DSP_VERSION
    if bld.env['build_target'] != 'mingw':
        obj.cxxflags += [ bld.env['compiler_flags_dict']['pic'] ]
        obj.cflags   += [ bld.env['compiler_flags_dict']['pic'] ]

def shutdown():
    autowaf.shutdown()