1 /* -*- c++ -*- */ 2 /* 3 * Copyright 2004,2008,2013 Free Software Foundation, Inc. 4 * 5 * This file is part of GNU Radio 6 * 7 * GNU Radio is free software; you can redistribute it and/or modify 8 * it under the terms of the GNU General Public License as published by 9 * the Free Software Foundation; either version 3, or (at your option) 10 * any later version. 11 * 12 * GNU Radio is distributed in the hope that it will be useful, 13 * but WITHOUT ANY WARRANTY; without even the implied warranty of 14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 15 * GNU General Public License for more details. 16 * 17 * You should have received a copy of the GNU General Public License 18 * along with GNU Radio; see the file COPYING. If not, write to 19 * the Free Software Foundation, Inc., 51 Franklin Street, 20 * Boston, MA 02110-1301, USA. 21 */ 22 23 #ifndef INCLUDED_GR_WAVFILE_SOURCE_IMPL_H 24 #define INCLUDED_GR_WAVFILE_SOURCE_IMPL_H 25 26 #include <gnuradio/blocks/wavfile_source.h> 27 #include <cstdio> // for FILE 28 29 namespace gr { 30 namespace blocks { 31 32 class wavfile_source_impl : public wavfile_source 33 { 34 private: 35 FILE* d_fp; 36 bool d_repeat; 37 38 unsigned d_sample_rate; 39 int d_nchans; 40 int d_bytes_per_sample; 41 int d_first_sample_pos; 42 unsigned d_samples_per_chan; 43 unsigned d_sample_idx; 44 int d_normalize_shift; 45 int d_normalize_fac; 46 47 /*! 48 * \brief Convert an integer sample value to a float value within [-1;1] 49 */ 50 float convert_to_float(short int sample); 51 52 public: 53 wavfile_source_impl(const char* filename, bool repeat); 54 ~wavfile_source_impl(); 55 sample_rate()56 unsigned int sample_rate() const { return d_sample_rate; }; 57 bits_per_sample()58 int bits_per_sample() const { return d_bytes_per_sample * 8; }; 59 channels()60 int channels() const { return d_nchans; }; 61 62 int work(int noutput_items, 63 gr_vector_const_void_star& input_items, 64 gr_vector_void_star& output_items); 65 }; 66 67 } /* namespace blocks */ 68 } /* namespace gr */ 69 70 #endif /* INCLUDED_GR_WAVFILE_SOURCE_IMPL_H */ 71