cmake_minimum_required(VERSION 3.8)

project(opus)

option(OPUS_STACK_PROTECTOR "Use stack protection" OFF)
option(OPUS_USE_ALLOCA "Use alloca for stack arrays (on non-C99 compilers)" OFF)
option(OPUS_CUSTOM_MODES "Enable non-Opus modes, e.g. 44.1 kHz & 2^n frames" OFF)
option(OPUS_FIXED_POINT "Compile as fixed-point (for machines without a fast enough FPU)" OFF)
option(OPUS_ENABLE_FLOAT_API "Compile with the floating point API (for machines with float library" ON)

include(opus/opus_functions.cmake)

if(OPUS_STACK_PROTECTOR)
    if(NOT MSVC) # GC on by default on MSVC
        check_and_set_flag(STACK_PROTECTION_STRONG -fstack-protector-strong)
    endif()
else()
    if(MSVC)
        check_and_set_flag(BUFFER_SECURITY_CHECK /GS-)
    endif()
endif()

add_library(opus STATIC
    # CELT sources
    opus/celt/bands.c
    opus/celt/celt.c
    opus/celt/celt_decoder.c
    opus/celt/celt_encoder.c
    opus/celt/celt_lpc.c
    opus/celt/cwrs.c
    opus/celt/entcode.c
    opus/celt/entdec.c
    opus/celt/entenc.c
    opus/celt/kiss_fft.c
    opus/celt/laplace.c
    opus/celt/mathops.c
    opus/celt/mdct.c
    opus/celt/modes.c
    opus/celt/pitch.c
    opus/celt/quant_bands.c
    opus/celt/rate.c
    opus/celt/vq.c

    # SILK sources
    opus/silk/A2NLSF.c
    opus/silk/CNG.c
    opus/silk/HP_variable_cutoff.c
    opus/silk/LPC_analysis_filter.c
    opus/silk/LPC_fit.c
    opus/silk/LPC_inv_pred_gain.c
    opus/silk/LP_variable_cutoff.c
    opus/silk/NLSF2A.c
    opus/silk/NLSF_VQ.c
    opus/silk/NLSF_VQ_weights_laroia.c
    opus/silk/NLSF_decode.c
    opus/silk/NLSF_del_dec_quant.c
    opus/silk/NLSF_encode.c
    opus/silk/NLSF_stabilize.c
    opus/silk/NLSF_unpack.c
    opus/silk/NSQ.c
    opus/silk/NSQ_del_dec.c
    opus/silk/PLC.c
    opus/silk/VAD.c
    opus/silk/VQ_WMat_EC.c
    opus/silk/ana_filt_bank_1.c
    opus/silk/biquad_alt.c
    opus/silk/bwexpander.c
    opus/silk/bwexpander_32.c
    opus/silk/check_control_input.c
    opus/silk/code_signs.c
    opus/silk/control_SNR.c
    opus/silk/control_audio_bandwidth.c
    opus/silk/control_codec.c
    opus/silk/dec_API.c
    opus/silk/decode_core.c
    opus/silk/decode_frame.c
    opus/silk/decode_indices.c
    opus/silk/decode_parameters.c
    opus/silk/decode_pitch.c
    opus/silk/decode_pulses.c
    opus/silk/decoder_set_fs.c
    opus/silk/enc_API.c
    opus/silk/encode_indices.c
    opus/silk/encode_pulses.c
    opus/silk/gain_quant.c
    opus/silk/init_decoder.c
    opus/silk/init_encoder.c
    opus/silk/inner_prod_aligned.c
    opus/silk/interpolate.c
    opus/silk/lin2log.c
    opus/silk/log2lin.c
    opus/silk/pitch_est_tables.c
    opus/silk/process_NLSFs.c
    opus/silk/quant_LTP_gains.c
    opus/silk/resampler.c
    opus/silk/resampler_down2.c
    opus/silk/resampler_down2_3.c
    opus/silk/resampler_private_AR2.c
    opus/silk/resampler_private_IIR_FIR.c
    opus/silk/resampler_private_down_FIR.c
    opus/silk/resampler_private_up2_HQ.c
    opus/silk/resampler_rom.c
    opus/silk/shell_coder.c
    opus/silk/sigm_Q15.c
    opus/silk/sort.c
    opus/silk/stereo_LR_to_MS.c
    opus/silk/stereo_MS_to_LR.c
    opus/silk/stereo_decode_pred.c
    opus/silk/stereo_encode_pred.c
    opus/silk/stereo_find_predictor.c
    opus/silk/stereo_quant_pred.c
    opus/silk/sum_sqr_shift.c
    opus/silk/table_LSF_cos.c
    opus/silk/tables_LTP.c
    opus/silk/tables_NLSF_CB_NB_MB.c
    opus/silk/tables_NLSF_CB_WB.c
    opus/silk/tables_gain.c
    opus/silk/tables_other.c
    opus/silk/tables_pitch_lag.c
    opus/silk/tables_pulses_per_block.c

    # Opus sources
    opus/src/analysis.c
    opus/src/mapping_matrix.c
    opus/src/mlp.c
    opus/src/mlp_data.c
    opus/src/opus.c
    opus/src/opus_decoder.c
    opus/src/opus_encoder.c
    opus/src/opus_multistream.c
    opus/src/opus_multistream_decoder.c
    opus/src/opus_multistream_encoder.c
    opus/src/opus_projection_decoder.c
    opus/src/opus_projection_encoder.c
    opus/src/repacketizer.c
)

if (DEBUG)
    target_sources(opus PRIVATE opus/silk/debug.c)
endif()

if (OPUS_FIXED_POINT)
    target_sources(opus PRIVATE
        opus/silk/fixed/LTP_analysis_filter_FIX.c
        opus/silk/fixed/LTP_scale_ctrl_FIX.c
        opus/silk/fixed/apply_sine_window_FIX.c
        opus/silk/fixed/autocorr_FIX.c
        opus/silk/fixed/burg_modified_FIX.c
        opus/silk/fixed/corrMatrix_FIX.c
        opus/silk/fixed/encode_frame_FIX.c
        opus/silk/fixed/find_LPC_FIX.c
        opus/silk/fixed/find_LTP_FIX.c
        opus/silk/fixed/find_pitch_lags_FIX.c
        opus/silk/fixed/find_pred_coefs_FIX.c
        opus/silk/fixed/k2a_FIX.c
        opus/silk/fixed/k2a_Q16_FIX.c
        opus/silk/fixed/noise_shape_analysis_FIX.c
        opus/silk/fixed/pitch_analysis_core_FIX.c
        opus/silk/fixed/prefilter_FIX.c
        opus/silk/fixed/process_gains_FIX.c
        opus/silk/fixed/regularize_correlations_FIX.c
        opus/silk/fixed/residual_energy16_FIX.c
        opus/silk/fixed/residual_energy_FIX.c
        opus/silk/fixed/schur64_FIX.c
        opus/silk/fixed/schur_FIX.c
        opus/silk/fixed/solve_LS_FIX.c
        opus/silk/fixed/vector_ops_FIX.c
        opus/silk/fixed/warped_autocorrelation_FIX.c
    )
else()
    target_sources(opus PRIVATE
        opus/silk/float/LPC_analysis_filter_FLP.c
        opus/silk/float/LPC_inv_pred_gain_FLP.c
        opus/silk/float/LTP_analysis_filter_FLP.c
        opus/silk/float/LTP_scale_ctrl_FLP.c
        opus/silk/float/apply_sine_window_FLP.c
        opus/silk/float/autocorrelation_FLP.c
        opus/silk/float/burg_modified_FLP.c
        opus/silk/float/bwexpander_FLP.c
        opus/silk/float/corrMatrix_FLP.c
        opus/silk/float/encode_frame_FLP.c
        opus/silk/float/energy_FLP.c
        opus/silk/float/find_LPC_FLP.c
        opus/silk/float/find_LTP_FLP.c
        opus/silk/float/find_pitch_lags_FLP.c
        opus/silk/float/find_pred_coefs_FLP.c
        opus/silk/float/inner_product_FLP.c
        opus/silk/float/k2a_FLP.c
        opus/silk/float/noise_shape_analysis_FLP.c
        opus/silk/float/pitch_analysis_core_FLP.c
        opus/silk/float/process_gains_FLP.c
        opus/silk/float/regularize_correlations_FLP.c
        opus/silk/float/residual_energy_FLP.c
        opus/silk/float/scale_copy_vector_FLP.c
        opus/silk/float/scale_vector_FLP.c
        opus/silk/float/schur_FLP.c
        opus/silk/float/sort_FLP.c
        opus/silk/float/warped_autocorrelation_FLP.c
        opus/silk/float/wrappers_FLP.c
    )
endif()

target_compile_definitions(opus PRIVATE OPUS_BUILD ENABLE_HARDENING)

if(NOT MSVC)
    if(MINGW)
        target_compile_definitions(opus PRIVATE _FORTIFY_SOURCE=0)
    else()
        target_compile_definitions(opus PRIVATE _FORTIFY_SOURCE=2)
    endif()
endif()

# It is strongly recommended to uncomment one of these VAR_ARRAYS: Use C99
# variable-length arrays for stack allocation USE_ALLOCA: Use alloca() for stack
# allocation If none is defined, then the fallback is a non-threadsafe global
# array
if(OPUS_USE_ALLOCA OR MSVC)
    target_compile_definitions(opus PRIVATE USE_ALLOCA)
else()
    target_compile_definitions(opus PRIVATE VAR_ARRAYS)
endif()

if(OPUS_CUSTOM_MODES)
    target_compile_definitions(opus PRIVATE CUSTOM_MODES)
endif()

if(NOT OPUS_ENABLE_FLOAT_API)
    target_compile_definitions(opus PRIVATE DISABLE_FLOAT_API)
endif()

target_compile_definitions(opus
PUBLIC
    -DOPUS_VERSION="\\"1.3.1\\""

PRIVATE
    # Use C99 intrinsics to speed up float-to-int conversion
    HAVE_LRINTF
)

if (FIXED_POINT)
    target_compile_definitions(opus PRIVATE -DFIXED_POINT=1 -DDISABLE_FLOAT_API)
endif()

target_include_directories(opus
PUBLIC
    opus/include

PRIVATE
    opus/celt
    opus/silk
    opus/silk/fixed
    opus/silk/float
    opus/src
)
