1 /* Copyright (c) 2023 Amazon */ 2 /* 3 Redistribution and use in source and binary forms, with or without 4 modification, are permitted provided that the following conditions 5 are met: 6 7 - Redistributions of source code must retain the above copyright 8 notice, this list of conditions and the following disclaimer. 9 10 - Redistributions in binary form must reproduce the above copyright 11 notice, this list of conditions and the following disclaimer in the 12 documentation and/or other materials provided with the distribution. 13 14 THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 15 ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 16 LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR 17 A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR 18 CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, 19 EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, 20 PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR 21 PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF 22 LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING 23 NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS 24 SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 25 */ 26 27 #ifndef LOSSGEN_H 28 #define LOSSGEN_H 29 30 31 #include "lossgen_data.h" 32 33 #define PITCH_MIN_PERIOD 32 34 #define PITCH_MAX_PERIOD 256 35 36 #define NB_XCORR_FEATURES (PITCH_MAX_PERIOD-PITCH_MIN_PERIOD) 37 38 39 typedef struct { 40 LossGen model; 41 float gru1_state[LOSSGEN_GRU1_STATE_SIZE]; 42 float gru2_state[LOSSGEN_GRU2_STATE_SIZE]; 43 int last_loss; 44 int used; 45 } LossGenState; 46 47 48 void lossgen_init(LossGenState *st); 49 int lossgen_load_model(LossGenState *st, const void *data, int len); 50 51 int sample_loss( 52 LossGenState *st, 53 float percent_loss); 54 55 #endif 56