1 files changed, 280 insertions, 0 deletions
diff --git a/sbc/sbcenc.c b/sbc/sbcenc.c
new file mode 100644
index 00000000..e17f8fdb
--- /dev/null
+++ b/sbc/sbcenc.c
@@ -0,0 +1,280 @@
+/*
+ *
+ *  Bluetooth low-complexity, subband codec (SBC) encoder
+ *
+ *  Copyright (C) 2004-2008  Marcel Holtmann <marcel@holtmann.org>
+ *
+ *
+ *  This program 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 2 of the License, or
+ *  (at your option) any later version.
+ *
+ *  This program 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 this program; if not, write to the Free Software
+ *  Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
+ *
+ */
+
+#ifdef HAVE_CONFIG_H
+#include <config.h>
+#endif
+
+#include <stdio.h>
+#include <errno.h>
+#include <fcntl.h>
+#include <unistd.h>
+#include <stdlib.h>
+#include <stdint.h>
+#include <string.h>
+#include <getopt.h>
+#include <byteswap.h>
+#include <sys/stat.h>
+
+#include "sbc.h"
+
+#if __BYTE_ORDER == __LITTLE_ENDIAN
+#define COMPOSE_ID(a,b,c,d)	((a) | ((b)<<8) | ((c)<<16) | ((d)<<24))
+#define LE_SHORT(v)		(v)
+#define LE_INT(v)		(v)
+#define BE_SHORT(v)		bswap_16(v)
+#define BE_INT(v)		bswap_32(v)
+#elif __BYTE_ORDER == __BIG_ENDIAN
+#define COMPOSE_ID(a,b,c,d)	((d) | ((c)<<8) | ((b)<<16) | ((a)<<24))
+#define LE_SHORT(v)		bswap_16(v)
+#define LE_INT(v)		bswap_32(v)
+#define BE_SHORT(v)		(v)
+#define BE_INT(v)		(v)
+#else
+#error "Wrong endian"
+#endif
+
+#define AU_MAGIC		COMPOSE_ID('.','s','n','d')
+
+#define AU_FMT_ULAW		1
+#define AU_FMT_LIN8		2
+#define AU_FMT_LIN16		3
+
+struct au_header {
+	uint32_t magic;		/* '.snd' */
+	uint32_t hdr_size;	/* size of header (min 24) */
+	uint32_t data_size;	/* size of data */
+	uint32_t encoding;	/* see to AU_FMT_XXXX */
+	uint32_t sample_rate;	/* sample rate */
+	uint32_t channels;	/* number of channels (voices) */
+};
+
+static ssize_t __read(int fd, void *buf, size_t count)
+{
+	ssize_t len, pos = 0;
+
+	while (count > 0) {
+		len = read(fd, buf + pos, count);
+		if (len <= 0)
+			return len;
+
+		count -= len;
+		pos   += len;
+	}
+
+	return pos;
+}
+
+static ssize_t __write(int fd, const void *buf, size_t count)
+{
+	ssize_t len, pos = 0;
+
+	while (count > 0) {
+		len = write(fd, buf + pos, count);
+		if (len <= 0)
+			return len;
+
+		count -= len;
+		pos   += len;
+	}
+
+	return pos;
+}
+
+static void encode(char *filename, int subbands, int joint)
+{
+	struct au_header *au_hdr;
+	unsigned char input[2048], output[2048];
+	sbc_t sbc;
+	int fd, len, size, count, encoded;
+
+	if (strcmp(filename, "-")) {
+		fd = open(filename, O_RDONLY);
+		if (fd < 0) {
+			fprintf(stderr, "Can't open file %s: %s\n",
+						filename, strerror(errno));
+			return;
+		}
+	} else
+		fd = fileno(stdin);
+
+	len = __read(fd, input, sizeof(input));
+	if (len < sizeof(*au_hdr)) {
+		if (fd > fileno(stderr))
+			fprintf(stderr, "Can't read header from file %s: %s\n",
+						filename, strerror(errno));
+		else
+			perror("Can't read audio header");
+		goto done;
+	}
+
+	au_hdr = (struct au_header *) input;
+
+	if (au_hdr->magic != AU_MAGIC ||
+			BE_INT(au_hdr->hdr_size) > 128 ||
+			BE_INT(au_hdr->hdr_size) < 24 ||
+			BE_INT(au_hdr->encoding) != AU_FMT_LIN16) {
+		fprintf(stderr, "Data is not in Sun/NeXT audio S16_BE format\n");
+		goto done;
+	}
+
+	sbc_init(&sbc, 0L);
+
+	switch (BE_INT(au_hdr->sample_rate)) {
+	case 16000:
+		sbc.frequency = SBC_FREQ_16000;
+		break;
+	case 32000:
+		sbc.frequency = SBC_FREQ_32000;
+		break;
+	case 44100:
+		sbc.frequency = SBC_FREQ_44100;
+		break;
+	case 48000:
+		sbc.frequency = SBC_FREQ_48000;
+		break;
+	}
+
+	sbc.subbands = subbands == 4 ? SBC_SB_4 : SBC_SB_8;
+
+	if (BE_INT(au_hdr->channels) == 1)
+		sbc.mode = SBC_MODE_MONO;
+	else if (joint)
+		sbc.mode = SBC_MODE_JOINT_STEREO;
+	else
+		sbc.mode = SBC_MODE_STEREO;
+
+	sbc.endian = SBC_BE;
+	count = BE_INT(au_hdr->data_size);
+	size = len - BE_INT(au_hdr->hdr_size);
+	memmove(input, input + BE_INT(au_hdr->hdr_size), size);
+
+	while (1) {
+		if (size < sizeof(input)) {
+			len = __read(fd, input + size, sizeof(input) - size);
+			if (len == 0)
+				break;
+
+			if (len < 0) {
+				perror("Can't read audio data");
+				break;
+			}
+
+			size += len;
+		}
+
+		len = sbc_encode(&sbc, input, size, output, sizeof(output),
+					&encoded);
+		if (len < size)
+			memmove(input, input + len, size - len);
+
+		size -= len;
+
+		len = __write(fileno(stdout), output, encoded);
+		if (len == 0)
+			break;
+
+		if (len < 0 || len != encoded) {
+			perror("Can't write SBC output");
+			break;
+		}
+	}
+
+	sbc_finish(&sbc);
+
+done:
+	if (fd > fileno(stderr))
+		close(fd);
+}
+
+static void usage(void)
+{
+	printf("SBC encoder utility ver %s\n", VERSION);
+	printf("Copyright (c) 2004-2008  Marcel Holtmann\n\n");
+
+	printf("Usage:\n"
+		"\tsbcenc [options] file(s)\n"
+		"\n");
+
+	printf("Options:\n"
+		"\t-h, --help           Display help\n"
+		"\t-v, --verbose        Verbose mode\n"
+		"\t-s, --subbands       Number of subbands to use (4 or 8)\n"
+		"\t-j, --joint          Joint stereo\n"
+		"\n");
+}
+
+static struct option main_options[] = {
+	{ "help",	0, 0, 'h' },
+	{ "verbose",	0, 0, 'v' },
+	{ "subbands",	1, 0, 's' },
+	{ "joint",	0, 0, 'j' },
+	{ 0, 0, 0, 0 }
+};
+
+int main(int argc, char *argv[])
+{
+	int i, opt, verbose = 0, subbands = 8, joint = 0;
+
+	while ((opt = getopt_long(argc, argv, "+hvs:j", main_options, NULL)) != -1) {
+		switch(opt) {
+		case 'h':
+			usage();
+			exit(0);
+
+		case 'v':
+			verbose = 1;
+			break;
+
+		case 's':
+			subbands = atoi(strdup(optarg));
+			if (subbands != 8 && subbands != 4) {
+				fprintf(stderr, "Invalid subbands %d!\n",
+						subbands);
+				exit(1);
+			}
+			break;
+
+		case 'j':
+			joint = 1;
+			break;
+
+		default:
+			exit(1);
+		}
+	}
+
+	argc -= optind;
+	argv += optind;
+	optind = 0;
+
+	if (argc < 1) {
+		usage();
+		exit(1);
+	}
+
+	for (i = 0; i < argc; i++)
+		encode(argv[i], subbands, joint);
+
+	return 0;
+}