3 files changed, 0 insertions, 139 deletions
diff --git a/util/spkmodem_recv/.gitignore b/util/spkmodem_recv/.gitignore
deleted file mode 100644
index 2f5c946c..00000000
--- a/util/spkmodem_recv/.gitignore
+++ /dev/null
@@ -1 +0,0 @@
-spkmodem-recv
diff --git a/util/spkmodem_recv/Makefile b/util/spkmodem_recv/Makefile
deleted file mode 100644
index 3c5dc51f..00000000
--- a/util/spkmodem_recv/Makefile
+++ /dev/null
@@ -1,14 +0,0 @@
-# SPDX-License-Identifier: GPL-2.0-or-later
-CC?=cc
-CFLAGS?=-Os -Wall -Wextra -Werror -pedantic
-DESTDIR?=
-PREFIX?=/usr/local
-INSTALL?=install
-
-spkmodem-recv:
-	$(CC) $(CFLAGS) -o $@ $@.c
-install: spkmodem-recv
-	$(INSTALL) -d $(DESTDIR)$(PREFIX)/bin/
-	$(INSTALL) $< -t $(DESTDIR)$(PREFIX)/bin/
-clean:
-	rm -f spkmodem-recv
diff --git a/util/spkmodem_recv/spkmodem-recv.c b/util/spkmodem_recv/spkmodem-recv.c
deleted file mode 100644
index 4467282d..00000000
--- a/util/spkmodem_recv/spkmodem-recv.c
+++ /dev/null
@@ -1,124 +0,0 @@
-/* SPDX-License-Identifier: GPL-2.0-or-later */
-/* SPDX-FileCopyrightText: 2013 Free Software Foundation, Inc. */
-/* Usage: parec --channels=1 --rate=48000 --format=s16le | ./spkmodem-recv */
-
-/* Forked from coreboot's version, at util/spkmodem_recv/ in coreboot.git,
- * revision 5c2b5fcf2f9c9259938fd03cfa3ea06b36a007f0 as of 3 January 2022.
- * This version is heavily modified, re-written based on OpenBSD Kernel Source
- * File Style Guide (KNF); this change is Copyright 2023 Leah Rowe. */
-
-#include <err.h>
-#include <errno.h>
-#include <stdio.h>
-#include <stdlib.h>
-#include <string.h>
-#include <unistd.h>
-
-#define SAMPLES_PER_FRAME 240
-#define MAX_SAMPLES (2 * SAMPLES_PER_FRAME)
-#define FREQ_SEP_MIN 5
-#define FREQ_SEP_MAX 15
-#define FREQ_DATA_MIN 15
-#define FREQ_DATA_THRESHOLD 25
-#define FREQ_DATA_MAX 60
-#define THRESHOLD 500
-
-#define ERR() (errno = errno ? errno : ECANCELED)
-#define reset_char() ascii = 0, ascii_bit = 7
-
-signed short frame[MAX_SAMPLES], pulse[MAX_SAMPLES];
-int ringpos, debug, freq_data, freq_separator, sample_count, ascii_bit = 7;
-char ascii = 0;
-
-void handle_audio(void);
-void decode_pulse(void);
-int set_ascii_bit(void);
-void print_char(void);
-void print_stats(void);
-
-int
-main(int argc, char *argv[])
-{
-	int c;
-#ifdef __OpenBSD__
-	if (pledge("stdio", NULL) == -1)
-		err(ERR(), "pledge");
-#endif
-	while ((c = getopt(argc, argv, "d")) != -1)
-		if (!(debug = (c == 'd')))
-			err(errno = EINVAL, NULL);
-	setvbuf(stdout, NULL, _IONBF, 0);
-	while (!feof(stdin))
-		handle_audio();
-	if (errno && debug)
-		err(errno, "Unhandled error, errno %d", errno);
-	return errno;
-}
-
-void
-handle_audio(void)
-{
-	if (sample_count > (3 * SAMPLES_PER_FRAME))
-		sample_count = reset_char();
-	if ((freq_separator <= FREQ_SEP_MIN) || (freq_separator >= FREQ_SEP_MAX)
-	    || (freq_data <= FREQ_DATA_MIN) || (freq_data >= FREQ_DATA_MAX)) {
-		decode_pulse();
-		return;
-	}
-
-	if (set_ascii_bit() < 0)
-		print_char();
-	sample_count = 0;
-	for (int sample = 0; sample < SAMPLES_PER_FRAME; sample++)
-		decode_pulse();
-}
-
-void
-decode_pulse(void)
-{
-	int next_ringpos = (ringpos + SAMPLES_PER_FRAME) % MAX_SAMPLES;
-	freq_data -= pulse[ringpos];
-	freq_data += pulse[next_ringpos];
-	freq_separator -= pulse[next_ringpos];
-
-	fread(frame + ringpos, 1, sizeof(frame[0]), stdin);
-	if (ferror(stdin) != 0)
-		err(ERR(), "Could not read from frame.");
-
-	if ((pulse[ringpos] = (abs(frame[ringpos]) > THRESHOLD) ? 1 : 0))
-		++freq_separator;
-	++ringpos;
-	ringpos %= MAX_SAMPLES;
-	++sample_count;
-}
-
-int
-set_ascii_bit(void)
-{
-	if (debug)
-		print_stats();
-	if (freq_data < FREQ_DATA_THRESHOLD)
-		ascii |= (1 << ascii_bit);
-	--ascii_bit;
-	return ascii_bit;
-}
-
-void
-print_char(void)
-{
-	if (debug)
-		printf("<%c, %x>", ascii, ascii);
-	else
-		printf("%c", ascii);
-	reset_char();
-}
-
-void
-print_stats(void)
-{
-	long stdin_pos;
-	if ((stdin_pos = ftell(stdin)) == -1)
-		err(ERR(), NULL);
-	printf ("%d %d %d @%ld\n", freq_data, freq_separator,
-	    FREQ_DATA_THRESHOLD, stdin_pos - sizeof(frame));
-}