diff options
Diffstat (limited to 'gr-vocoder/lib/vocoder_cvsd_encode_sb.cc')
| -rw-r--r-- | gr-vocoder/lib/vocoder_cvsd_encode_sb.cc | 40 |
1 files changed, 20 insertions, 20 deletions
diff --git a/gr-vocoder/lib/vocoder_cvsd_encode_sb.cc b/gr-vocoder/lib/vocoder_cvsd_encode_sb.cc index 71cf6df8c..e15882c22 100644 --- a/gr-vocoder/lib/vocoder_cvsd_encode_sb.cc +++ b/gr-vocoder/lib/vocoder_cvsd_encode_sb.cc @@ -1,19 +1,19 @@ /* -*- c++ -*- */ /* * Copyright 2007,2010,2011 Free Software Foundation, Inc. - * + * * This file is part of GNU Radio - * + * * GNU Radio 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, or (at your option) * any later version. - * + * * GNU Radio 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 GNU Radio; see the file COPYING. If not, write to * the Free Software Foundation, Inc., 51 Franklin Street, @@ -37,7 +37,7 @@ * Create a new instance of vocoder_cvsd_encode_sb and return * a boost shared_ptr. This is effectively the public constructor. */ -vocoder_cvsd_encode_sb_sptr +vocoder_cvsd_encode_sb_sptr vocoder_make_cvsd_encode_sb (short min_step, short max_step, double step_decay, double accum_decay, int K, int J, short pos_accum_max, short neg_accum_max) @@ -47,7 +47,7 @@ vocoder_make_cvsd_encode_sb (short min_step, short max_step, double step_decay, pos_accum_max, neg_accum_max)); } -vocoder_cvsd_encode_sb::vocoder_cvsd_encode_sb (short min_step, short max_step, double step_decay, +vocoder_cvsd_encode_sb::vocoder_cvsd_encode_sb (short min_step, short max_step, double step_decay, double accum_decay, int K, int J, short pos_accum_max, short neg_accum_max) : gr_sync_decimator ("vocoder_cvsd_encode_sb", @@ -55,10 +55,10 @@ vocoder_cvsd_encode_sb::vocoder_cvsd_encode_sb (short min_step, short max_step, gr_make_io_signature (1, 1, sizeof (unsigned char)), 8), d_min_step (min_step), d_max_step(max_step), d_step_decay(step_decay), - d_accum_decay(accum_decay), d_K(K), d_J(J), + d_accum_decay(accum_decay), d_K(K), d_J(J), d_pos_accum_max(pos_accum_max), d_neg_accum_max(neg_accum_max), - d_accum(0), - d_loop_counter(1), + d_accum(0), + d_loop_counter(1), d_runner(0), d_stepsize(min_step) @@ -77,7 +77,7 @@ unsigned char vocoder_cvsd_encode_sb::cvsd_bitwise_sum (unsigned int input) { unsigned int temp=input; unsigned char bits=0; - + while(temp) { temp=temp&(temp-1); bits++; @@ -90,7 +90,7 @@ int vocoder_cvsd_encode_sb::cvsd_round (double input) double temp; temp=input+0.5; temp=floor(temp); - + return (int)temp; } @@ -101,10 +101,10 @@ unsigned int vocoder_cvsd_encode_sb::cvsd_pow (short radix, short power) double output; output=pow(d_radix,i_power); - return ( (unsigned int) cvsd_round(output)); + return ( (unsigned int) cvsd_round(output)); } -int +int vocoder_cvsd_encode_sb::work (int noutput_items, gr_vector_const_void_star &input_items, gr_vector_void_star &output_items) @@ -117,7 +117,7 @@ vocoder_cvsd_encode_sb::work (int noutput_items, unsigned char output_byte=0; // 1 bytes 0.255 unsigned char bit_count=0; // 1 byte, 0 .. 255 unsigned int mask=0; // 4 bytes, 0 .. 4,294,967,295 - + // Loop through each input data point for(i = 0; i < noutput_items*8; i++) { if((int)in[i] >= d_accum) { // Note: sign((data(n)-accum)) @@ -126,7 +126,7 @@ vocoder_cvsd_encode_sb::work (int noutput_items, else { output_bit=0; } - + // Update Accum (i.e. the reference value) if (output_bit) { d_accum=d_accum+d_stepsize; @@ -147,7 +147,7 @@ vocoder_cvsd_encode_sb::work (int noutput_items, else if(d_accum <= ((int) d_neg_accum_max)) { d_accum = (int) d_neg_accum_max; } - + // Update runner with the last output bit // Update Step Size if (d_loop_counter >= d_J) { // Run this only if you have >= J bits in your shift register @@ -158,10 +158,10 @@ vocoder_cvsd_encode_sb::work (int noutput_items, } else { // No runs of 1s and 0s - d_stepsize = std::max( (short)cvsd_round(d_stepsize*d_step_decay), d_min_step); + d_stepsize = std::max( (short)cvsd_round(d_stepsize*d_step_decay), d_min_step); } } - + // Runner is a shift-register; shift left, add on newest output bit d_runner = (d_runner<<1) | ((unsigned int) output_bit); @@ -169,7 +169,7 @@ vocoder_cvsd_encode_sb::work (int noutput_items, // If you have put in 8 bits, output it as a byte output_byte = (output_byte<<1) | output_bit; bit_count++; - + if (d_loop_counter <= d_K) { d_loop_counter++; } @@ -178,7 +178,7 @@ vocoder_cvsd_encode_sb::work (int noutput_items, if (bit_count==8) { // Read in short from the file *(out++) = output_byte; - + // Reset the bit_count bit_count=0; output_byte=0; |