/*  Copyright (C) 2013 Paul Brossier <piem@aubio.org>   This file is part of aubio.   aubio is free software: you can redistribute it and/or modify  it under the terms of the GNU General Public License as published by  the Free Software Foundation, either version 3 of the License, or  (at your option) any later version.   aubio is distributed in the hope that it will be useful,  but WITHOUT ANY WARRANTY; without even the implied warranty of  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the  GNU General Public License for more details.   You should have received a copy of the GNU General Public License  along with aubio.  If not, see <http://www.gnu.org/licenses/>. */ #ifndef AUBIO_SOURCE_AVCODEC_H#define AUBIO_SOURCE_AVCODEC_H /** \file   Read from file using [libavcodec](http://libav.org/)   Avoid including this file directly! Prefer using ::aubio_source_t instead to  make your code portable.   To write to file, use ::aubio_sink_t.   \example io/test-source_avcodec.c */ #ifdef __cplusplusextern "C" {#endif /** avcodec media source object */typedef struct _aubio_source_avcodec_t aubio_source_avcodec_t; /**   create new ::aubio_source_avcodec_t   \param uri the file path or uri to read from  \param samplerate sampling rate to view the fie at  \param hop_size the size of the blocks to read from   Creates a new source object. If `0` is passed as `samplerate`, the sample  rate of the original file is used.   The samplerate of newly created source can be obtained using  ::aubio_source_avcodec_get_samplerate. */aubio_source_avcodec_t * new_aubio_source_avcodec(const char_t * uri, uint_t samplerate, uint_t hop_size); /**   read monophonic vector of length hop_size from source object   \param s source object, created with ::new_aubio_source_avcodec  \param read_to ::fvec_t of data to read to  \param[out] read upon returns, equals to number of frames actually read   Upon returns, `read` contains the number of frames actually read from the  source. `hop_size` if enough frames could be read, less otherwise. */void aubio_source_avcodec_do(aubio_source_avcodec_t * s, fvec_t * read_to, uint_t * read); /**   read polyphonic vector of length hop_size from source object   \param s source object, created with ::new_aubio_source_avcodec  \param read_to ::fmat_t of data to read to  \param read upon returns, equals to number of frames actually read   Upon returns, `read` contains the number of frames actually read from the  source. `hop_size` if enough frames could be read, less otherwise. */void aubio_source_avcodec_do_multi(aubio_source_avcodec_t * s, fmat_t * read_to, uint_t * read); /**   get samplerate of source object   \param s source object, created with ::new_aubio_source_avcodec  \return samplerate, in Hz */uint_t aubio_source_avcodec_get_samplerate(const aubio_source_avcodec_t * s); /**   get number of channels of source object   \param s source object, created with ::new_aubio_source_avcodec  \return number of channels */uint_t aubio_source_avcodec_get_channels (const aubio_source_avcodec_t * s); /**   seek source object   \param s source object, created with ::new_aubio_source_avcodec  \param pos position to seek to, in frames   \return 0 if sucessful, non-zero on failure */uint_t aubio_source_avcodec_seek (aubio_source_avcodec_t *s, uint_t pos); /**   get the duration of source object, in frames   \param s source object, created with ::new_aubio_source_avcodec  \return number of frames in file */uint_t aubio_source_avcodec_get_duration (aubio_source_avcodec_t * s); /**   close source   \param s source object, created with ::new_aubio_source_avcodec   \return 0 if sucessful, non-zero on failure */uint_t aubio_source_avcodec_close (aubio_source_avcodec_t *s); /**   close source and cleanup memory   \param s source object, created with ::new_aubio_source_avcodec */void del_aubio_source_avcodec(aubio_source_avcodec_t * s); #ifdef __cplusplus}#endif #endif /* AUBIO_SOURCE_AVCODEC_H */