/*
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mediastreamer2 library - modular sound and video processing and streaming
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Copyright (C) 2014 Belledonne Communications SARL
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This program is free software; you can redistribute it and/or
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modify it under the terms of the GNU General Public License
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as published by the Free Software Foundation; either version 2
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of the License, or (at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
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*/
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#ifndef msutils_h
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#define msutils_h
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#include "mediastreamer2/mscommon.h"
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#ifdef __cplusplus
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extern "C"{
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#endif
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typedef void (*MSAudioDiffProgressNotify)(void* user_data, int percentage);
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typedef struct _MSAudioDiffParams{
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int max_shift_percent; /*percentage of overlap between the two signals, used to restrict the cross correlation around t=0 in range [1 ; 100].*/
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int chunk_size_ms; /*chunk size in milliseconds, if chunked cross correlation is to be used. Use 0 otherwise.*/
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}MSAudioDiffParams;
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/**
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* Utility that compares two PCM 16 bits audio files and returns a similarity factor between 0 and 1.
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* @param ref_file path to a wav file contaning the reference audio segment
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* @param matched_file path to a wav file contaning the audio segment where the reference file is to be matched.
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* @param ret the similarity factor, set in return
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* @param max_shift_percent percentage of overlap between the two signals, used to restrict the cross correlation around t=0 in range [1 ; 100].
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* @param func a callback called to show progress of the operation
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* @param user_data a user data passed to the callback when invoked.
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* @return -1 on error, 0 if succesful.
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**/
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MS2_PUBLIC int ms_audio_diff(const char *ref_file, const char *matched_file, double *ret, const MSAudioDiffParams *params, MSAudioDiffProgressNotify func, void *user_data);
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#ifdef __cplusplus
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}
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#endif
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#endif
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