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| author | Johnathan Corgan <johnathan@corganlabs.com> | 2016-09-19 06:52:40 -0700 |
|---|---|---|
| committer | Johnathan Corgan <johnathan@corganlabs.com> | 2016-09-19 06:52:40 -0700 |
| commit | 67f7d12f740ea01534f8c979feafa9793d6a3515 (patch) | |
| tree | 0c8662cd650d0f7cccabc05ec76119c8086b98ec /gr-dtv | |
| parent | d57a138e335dd71c2b0264eb13e2e0fc84a7a541 (diff) | |
| parent | 0ae47375f8de509d059a8a23620458131fecd17e (diff) | |
Merge branch 'maint'
Diffstat (limited to 'gr-dtv')
| -rw-r--r-- | gr-dtv/lib/atsc/atsc_sync_impl.cc | 42 | ||||
| -rw-r--r-- | gr-dtv/lib/atsc/atsc_sync_impl.h | 10 |
2 files changed, 25 insertions, 27 deletions
diff --git a/gr-dtv/lib/atsc/atsc_sync_impl.cc b/gr-dtv/lib/atsc/atsc_sync_impl.cc index d83bccc5e0..7ecc33612a 100644 --- a/gr-dtv/lib/atsc/atsc_sync_impl.cc +++ b/gr-dtv/lib/atsc/atsc_sync_impl.cc @@ -1,6 +1,6 @@ /* -*- c++ -*- */ /* - * Copyright 2014 Free Software Foundation, Inc. + * Copyright 2014,2016 Free Software Foundation, Inc. * * This file is part of GNU Radio * @@ -35,8 +35,8 @@ namespace gr { static const double ADJUSTMENT_GAIN = 1.0e-5 / (10 * ATSC_DATA_SEGMENT_LENGTH); static const int SYMBOL_INDEX_OFFSET = 3; static const int MIN_SEG_LOCK_CORRELATION_VALUE = 5; - static const int SSI_MIN = -16; - static const int SSI_MAX = 15; + static const char SSI_MIN = -16; + static const char SSI_MAX = 15; atsc_sync::sptr atsc_sync::make(float rate) @@ -62,9 +62,6 @@ namespace gr { d_w = d_rx_clock_to_symbol_freq; d_mu = 0.5; - for (int i = 0; i < ATSC_DATA_SEGMENT_LENGTH; i++) - sample_mem[i] = 0; - d_timing_adjust = 0; d_counter = 0; d_symbol_index = 0; @@ -72,8 +69,9 @@ namespace gr { d_sr = 0; - for (int i = 0; i < ATSC_DATA_SEGMENT_LENGTH; i++) - d_integrator[i] = SSI_MIN; + memset(d_sample_mem, 0, ATSC_DATA_SEGMENT_LENGTH * sizeof(*d_sample_mem)); // (float)0 = 0x00000000 + memset(d_data_mem, 0, ATSC_DATA_SEGMENT_LENGTH * sizeof(*d_data_mem)); // (float)0 = 0x00000000 + memset(d_integrator, SSI_MIN, ATSC_DATA_SEGMENT_LENGTH * sizeof(*d_integrator)); // signed char } atsc_sync_impl::~atsc_sync_impl() @@ -103,7 +101,7 @@ namespace gr { // amount actually consumed d_si = 0; - for (output_produced = 0; output_produced < noutput_items && (d_si + (int)d_interp.ntaps()) < ninput_items[0];) { + for (d_output_produced = 0; d_output_produced < noutput_items && (d_si + (int)d_interp.ntaps()) < ninput_items[0];) { // First we interpolate a sample from input to work with interp_sample = d_interp.interpolate(&in[d_si], d_mu); @@ -119,7 +117,7 @@ namespace gr { d_si += d_incr; // Remember the sample at this count position - sample_mem[d_counter] = interp_sample; + d_sample_mem[d_counter] = interp_sample; // Is the sample positive or negative? int bit = (interp_sample < 0 ? 0 : 1); @@ -154,22 +152,22 @@ namespace gr { d_seg_locked = best_correlation_value >= MIN_SEG_LOCK_CORRELATION_VALUE; // the coefficients are -1,-1,+1,+1 - //d_timing_adjust = sample_mem[best_correlation_index - 3] + - // sample_mem[best_correlation_index - 2] - - // sample_mem[best_correlation_index - 1] - - // sample_mem[best_correlation_index]; + //d_timing_adjust = d_sample_mem[best_correlation_index - 3] + + // d_sample_mem[best_correlation_index - 2] - + // d_sample_mem[best_correlation_index - 1] - + // d_sample_mem[best_correlation_index]; //printf( "d_timing_adjust = %f\n", d_timing_adjust ); int corr_count = best_correlation_index; - d_timing_adjust = -sample_mem[corr_count--]; + d_timing_adjust = -d_sample_mem[corr_count--]; if( corr_count < 0 ) corr_count = ATSC_DATA_SEGMENT_LENGTH - 1; - d_timing_adjust -= sample_mem[corr_count--]; + d_timing_adjust -= d_sample_mem[corr_count--]; if( corr_count < 0 ) corr_count = ATSC_DATA_SEGMENT_LENGTH - 1; - d_timing_adjust += sample_mem[corr_count--]; + d_timing_adjust += d_sample_mem[corr_count--]; if( corr_count < 0 ) corr_count = ATSC_DATA_SEGMENT_LENGTH - 1; - d_timing_adjust += sample_mem[corr_count--]; + d_timing_adjust += d_sample_mem[corr_count--]; d_symbol_index = SYMBOL_INDEX_OFFSET - 1 - best_correlation_index; if (d_symbol_index < 0) @@ -183,19 +181,19 @@ namespace gr { // half full, this is OK becouse the fs_checker will not let packets though // untill a non-corrupted field packet is found if( d_seg_locked ) { - data_mem[d_symbol_index] = interp_sample; + d_data_mem[d_symbol_index] = interp_sample; if( d_symbol_index >= (ATSC_DATA_SEGMENT_LENGTH - 1) ) { for( int i = 0; i < ATSC_DATA_SEGMENT_LENGTH; i++ ) - soft_data_segment_out[output_produced].data[i] = data_mem[i]; - output_produced++; + soft_data_segment_out[d_output_produced].data[i] = d_data_mem[i]; + d_output_produced++; } } } consume_each(d_si); - return output_produced; + return d_output_produced; } diff --git a/gr-dtv/lib/atsc/atsc_sync_impl.h b/gr-dtv/lib/atsc/atsc_sync_impl.h index f5e645049c..670cb311e1 100644 --- a/gr-dtv/lib/atsc/atsc_sync_impl.h +++ b/gr-dtv/lib/atsc/atsc_sync_impl.h @@ -1,6 +1,6 @@ /* -*- c++ -*- */ /* - * Copyright 2014 Free Software Foundation, Inc. + * Copyright 2014,2016 Free Software Foundation, Inc. * * This file is part of GNU Radio * @@ -44,16 +44,16 @@ namespace gr { double d_mu; // fractional delay [0,1] int d_incr; - float sample_mem[ATSC_DATA_SEGMENT_LENGTH]; - float data_mem[ATSC_DATA_SEGMENT_LENGTH]; + float d_sample_mem[ATSC_DATA_SEGMENT_LENGTH]; + float d_data_mem[ATSC_DATA_SEGMENT_LENGTH]; double d_timing_adjust; int d_counter; // free running mod 832 counter int d_symbol_index; bool d_seg_locked; - int d_sr; // 4 bit shift register + unsigned char d_sr; // 4 bit shift register signed char d_integrator[ATSC_DATA_SEGMENT_LENGTH]; - int output_produced; + int d_output_produced; public: atsc_sync_impl(float rate); |