From 21c95a82a495f0cf9dfe511f9ef370bae9ac0eeb Mon Sep 17 00:00:00 2001
From: Tom Rondeau <trondeau@vt.edu>
Date: Sat, 9 Mar 2013 09:35:07 -0500
Subject: blocks: moved tagged_file_sink and wavfile source/sink/base to
gr-blocks.
---
gr-blocks/lib/wavfile_source_impl.cc | 174 +++++++++++++++++++++++++++++++++++
1 file changed, 174 insertions(+)
create mode 100644 gr-blocks/lib/wavfile_source_impl.cc
(limited to 'gr-blocks/lib/wavfile_source_impl.cc')
diff --git a/gr-blocks/lib/wavfile_source_impl.cc b/gr-blocks/lib/wavfile_source_impl.cc
new file mode 100644
index 0000000000..2e3b0e240c
--- /dev/null
+++ b/gr-blocks/lib/wavfile_source_impl.cc
@@ -0,0 +1,174 @@
+/* -*- c++ -*- */
+/*
+ * Copyright 2004,2008,2010,2013 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,
+ * Boston, MA 02110-1301, USA.
+ */
+
+#ifdef HAVE_CONFIG_H
+#include "config.h"
+#endif
+
+#include "wavfile_source_impl.h"
+#include <gr_io_signature.h>
+#include <blocks/wavfile.h>
+#include <sys/types.h>
+#include <fcntl.h>
+#include <stdexcept>
+
+// win32 (mingw/msvc) specific
+#ifdef HAVE_IO_H
+#include <io.h>
+#endif
+#ifdef O_BINARY
+#define OUR_O_BINARY O_BINARY
+#else
+#define OUR_O_BINARY 0
+#endif
+// should be handled via configure
+#ifdef O_LARGEFILE
+#define OUR_O_LARGEFILE O_LARGEFILE
+#else
+#define OUR_O_LARGEFILE 0
+#endif
+
+namespace gr {
+ namespace blocks {
+
+ wavfile_source::sptr
+ wavfile_source::make(const char *filename, bool repeat)
+ {
+ return gnuradio::get_initial_sptr
+ (new wavfile_source_impl(filename, repeat));
+ }
+
+ wavfile_source_impl::wavfile_source_impl (const char *filename, bool repeat)
+ : gr_sync_block("wavfile_source",
+ gr_make_io_signature(0, 0, 0),
+ gr_make_io_signature(1, 2, sizeof(float))),
+ d_fp(NULL), d_repeat(repeat),
+ d_sample_rate(1), d_nchans(1), d_bytes_per_sample(2), d_first_sample_pos(0),
+ d_samples_per_chan(0), d_sample_idx(0)
+ {
+ // we use "open" to use to the O_LARGEFILE flag
+
+ int fd;
+ if((fd = open (filename, O_RDONLY | OUR_O_LARGEFILE | OUR_O_BINARY)) < 0) {
+ perror(filename);
+ throw std::runtime_error("can't open file");
+ }
+
+ if((d_fp = fdopen(fd, "rb")) == NULL) {
+ perror(filename);
+ throw std::runtime_error("can't open file");
+ }
+
+ // Scan headers, check file validity
+ if(!wavheader_parse(d_fp,
+ d_sample_rate,
+ d_nchans,
+ d_bytes_per_sample,
+ d_first_sample_pos,
+ d_samples_per_chan)) {
+ throw std::runtime_error("is not a valid wav file");
+ }
+
+ if(d_samples_per_chan == 0) {
+ throw std::runtime_error("WAV file does not contain any samples");
+ }
+
+ if(d_bytes_per_sample == 1) {
+ d_normalize_fac = 128;
+ d_normalize_shift = 1;
+ }
+ else {
+ d_normalize_fac = 0x7FFF;
+ d_normalize_shift = 0;
+ }
+
+ // Re-set the output signature
+ set_output_signature(gr_make_io_signature(1, d_nchans, sizeof(float)));
+ }
+
+ wavfile_source_impl::~wavfile_source_impl ()
+ {
+ fclose(d_fp);
+ }
+
+ float
+ wavfile_source_impl::convert_to_float(short int sample)
+ {
+ float sample_out = (float)sample;
+ sample_out /= d_normalize_fac;
+ sample_out -= d_normalize_shift;
+ return sample_out;
+ }
+
+ int
+ wavfile_source_impl::work(int noutput_items,
+ gr_vector_const_void_star &input_items,
+ gr_vector_void_star &output_items)
+ {
+ float **out = (float**)&output_items[0];
+ int n_out_chans = output_items.size();
+
+ int i;
+ short sample;
+
+ for(i = 0; i < noutput_items; i++) {
+ if(d_sample_idx >= d_samples_per_chan) {
+ if(!d_repeat) {
+ // if nothing was read at all, say we're done.
+ return i ? i : -1;
+ }
+
+ if(fseek (d_fp, d_first_sample_pos, SEEK_SET) == -1) {
+ fprintf(stderr, "[%s] fseek failed\n", __FILE__);
+ exit(-1);
+ }
+
+ d_sample_idx = 0;
+ }
+
+ for(int chan = 0; chan < d_nchans; chan++) {
+ sample = wav_read_sample(d_fp, d_bytes_per_sample);
+
+ if(chan < n_out_chans) {
+ out[chan][i] = convert_to_float(sample);
+ }
+ }
+
+ d_sample_idx++;
+
+ // OK, EOF is not necessarily an error. But we're not going to
+ // deal with handling corrupt wav files, so if they give us any
+ // trouble they won't be processed. Serves them bloody right.
+ if(feof(d_fp) || ferror(d_fp)) {
+ if(i == 0) {
+ fprintf(stderr, "[%s] WAV file has corrupted header or i/o error\n", __FILE__);
+ return -1;
+ }
+ return i;
+ }
+ }
+
+ return noutput_items;
+ }
+
+ } /* namespace blocks */
+} /* namespace gr */
--
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