/* Copyright (c) 2022 Amazon
   Written by Jan Buethe */
/*
   Redistribution and use in source and binary forms, with or without
   modification, are permitted provided that the following conditions
   are met:

   - Redistributions of source code must retain the above copyright
   notice, this list of conditions and the following disclaimer.

   - Redistributions in binary form must reproduce the above copyright
   notice, this list of conditions and the following disclaimer in the
   documentation and/or other materials provided with the distribution.

   THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
   ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
   LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
   A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER
   OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
   EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
   PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
   PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
   LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
   NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
   SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/

#ifndef DRED_ENCODER_H
#define DRED_ENCODER_H

#include "lpcnet.h"
#include "dred_config.h"
#include "dred_rdovae.h"
#include "entcode.h"
#include "lpcnet_private.h"
#include "dred_rdovae_enc.h"
#include "dred_rdovae_enc_data.h"

#define RESAMPLING_ORDER 8

typedef struct {
    RDOVAEEnc model;
    LPCNetEncState lpcnet_enc_state;
    RDOVAEEncState rdovae_enc;
    int loaded;
    opus_int32 Fs;
    int channels;

#define DREDENC_RESET_START input_buffer
    float input_buffer[2*DRED_DFRAME_SIZE];
    int input_buffer_fill;
    int dred_offset;
    int latent_offset;
    int last_extra_dred_offset;
    float latents_buffer[DRED_MAX_FRAMES * DRED_LATENT_DIM];
    int latents_buffer_fill;
    float state_buffer[DRED_MAX_FRAMES * DRED_STATE_DIM];
    float resample_mem[RESAMPLING_ORDER + 1];
} DREDEnc;

int dred_encoder_load_model(DREDEnc* enc, const void *data, int len);
void dred_encoder_init(DREDEnc* enc, opus_int32 Fs, int channels);
void dred_encoder_reset(DREDEnc* enc);

void dred_deinit_encoder(DREDEnc *enc);

void dred_compute_latents(DREDEnc *enc, const float *pcm, int frame_size, int extra_delay, int arch);

int dred_encode_silk_frame(DREDEnc *enc, unsigned char *buf, int max_chunks, int max_bytes, int q0, int dQ, int qmax, unsigned char *activity_mem, int arch);

#endif