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-rw-r--r--sbc/sbcenc.c308
1 files changed, 308 insertions, 0 deletions
diff --git a/sbc/sbcenc.c b/sbc/sbcenc.c
new file mode 100644
index 0000000..3d3a7dc
--- /dev/null
+++ b/sbc/sbcenc.c
@@ -0,0 +1,308 @@
+/*
+ *
+ * Bluetooth low-complexity, subband codec (SBC) encoder
+ *
+ * Copyright (C) 2008-2010 Nokia Corporation
+ * Copyright (C) 2004-2010 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 <sys/stat.h>
+
+#include "sbc.h"
+#include "formats.h"
+
+static int verbose = 0;
+
+#define BUF_SIZE 32768
+static unsigned char input[BUF_SIZE], output[BUF_SIZE + BUF_SIZE / 4];
+
+static void encode(char *filename, int subbands, int bitpool, int joint,
+ int dualchannel, int snr, int blocks)
+{
+ struct au_header au_hdr;
+ sbc_t sbc;
+ int fd, size, srate, codesize, nframes;
+ ssize_t encoded;
+ ssize_t len;
+
+ if (sizeof(au_hdr) != 24) {
+ /* Sanity check just in case */
+ fprintf(stderr, "FIXME: sizeof(au_hdr) != 24\n");
+ return;
+ }
+
+ 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, &au_hdr, sizeof(au_hdr));
+ if (len < (ssize_t) 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;
+ }
+
+ if (au_hdr.magic != AU_MAGIC ||
+ BE_INT(au_hdr.hdr_size) > 128 ||
+ BE_INT(au_hdr.hdr_size) < sizeof(au_hdr) ||
+ BE_INT(au_hdr.encoding) != AU_FMT_LIN16) {
+ fprintf(stderr, "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;
+ }
+
+ srate = BE_INT(au_hdr.sample_rate);
+
+ sbc.subbands = subbands == 4 ? SBC_SB_4 : SBC_SB_8;
+
+ if (BE_INT(au_hdr.channels) == 1) {
+ sbc.mode = SBC_MODE_MONO;
+ if (joint || dualchannel) {
+ fprintf(stderr, "Audio is mono but joint or "
+ "dualchannel mode has been specified\n");
+ goto done;
+ }
+ } else if (joint && !dualchannel)
+ sbc.mode = SBC_MODE_JOINT_STEREO;
+ else if (!joint && dualchannel)
+ sbc.mode = SBC_MODE_DUAL_CHANNEL;
+ else if (!joint && !dualchannel)
+ sbc.mode = SBC_MODE_STEREO;
+ else {
+ fprintf(stderr, "Both joint and dualchannel mode have been "
+ "specified\n");
+ goto done;
+ }
+
+ sbc.endian = SBC_BE;
+ /* Skip extra bytes of the header if any */
+ if (read(fd, input, BE_INT(au_hdr.hdr_size) - len) < 0)
+ goto done;
+
+ sbc.bitpool = bitpool;
+ sbc.allocation = snr ? SBC_AM_SNR : SBC_AM_LOUDNESS;
+ sbc.blocks = blocks == 4 ? SBC_BLK_4 :
+ blocks == 8 ? SBC_BLK_8 :
+ blocks == 12 ? SBC_BLK_12 : SBC_BLK_16;
+
+ if (verbose) {
+ fprintf(stderr, "encoding %s with rate %d, %d blocks, "
+ "%d subbands, %d bits, allocation method %s, "
+ "and mode %s\n",
+ filename, srate, blocks, subbands, bitpool,
+ sbc.allocation == SBC_AM_SNR ? "SNR" : "LOUDNESS",
+ sbc.mode == SBC_MODE_MONO ? "MONO" :
+ sbc.mode == SBC_MODE_STEREO ?
+ "STEREO" : "JOINTSTEREO");
+ }
+
+ codesize = sbc_get_codesize(&sbc);
+ nframes = sizeof(input) / codesize;
+ while (1) {
+ unsigned char *inp, *outp;
+ /* read data for up to 'nframes' frames of input data */
+ size = read(fd, input, codesize * nframes);
+ if (size < 0) {
+ /* Something really bad happened */
+ perror("Can't read audio data");
+ break;
+ }
+ if (size < codesize) {
+ /* Not enough data for encoding even a single frame */
+ break;
+ }
+ /* encode all the data from the input buffer in a loop */
+ inp = input;
+ outp = output;
+ while (size >= codesize) {
+ len = sbc_encode(&sbc, inp, codesize,
+ outp, sizeof(output) - (outp - output),
+ &encoded);
+ if (len != codesize || encoded <= 0) {
+ fprintf(stderr,
+ "sbc_encode fail, len=%zd, encoded=%lu\n",
+ len, (unsigned long) encoded);
+ break;
+ }
+ size -= len;
+ inp += len;
+ outp += encoded;
+ }
+ len = write(fileno(stdout), output, outp - output);
+ if (len != outp - output) {
+ perror("Can't write SBC output");
+ break;
+ }
+ if (size != 0) {
+ /*
+ * sbc_encode failure has been detected earlier or end
+ * of file reached (have trailing partial data which is
+ * insufficient to encode SBC frame)
+ */
+ 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) 2004-2010 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-b, --bitpool Bitpool value (default is 32)\n"
+ "\t-j, --joint Joint stereo\n"
+ "\t-d, --dualchannel Dual channel\n"
+ "\t-S, --snr Use SNR mode (default is loudness)\n"
+ "\t-B, --blocks Number of blocks (4, 8, 12 or 16)\n"
+ "\n");
+}
+
+static struct option main_options[] = {
+ { "help", 0, 0, 'h' },
+ { "verbose", 0, 0, 'v' },
+ { "subbands", 1, 0, 's' },
+ { "bitpool", 1, 0, 'b' },
+ { "joint", 0, 0, 'j' },
+ { "dualchannel",0, 0, 'd' },
+ { "snr", 0, 0, 'S' },
+ { "blocks", 1, 0, 'B' },
+ { 0, 0, 0, 0 }
+};
+
+int main(int argc, char *argv[])
+{
+ int i, opt, subbands = 8, bitpool = 32, joint = 0, dualchannel = 0;
+ int snr = 0, blocks = 16;
+
+ while ((opt = getopt_long(argc, argv, "+hvs:b:jdSB:",
+ main_options, NULL)) != -1) {
+ switch(opt) {
+ case 'h':
+ usage();
+ exit(0);
+
+ case 'v':
+ verbose = 1;
+ break;
+
+ case 's':
+ subbands = atoi(optarg);
+ if (subbands != 8 && subbands != 4) {
+ fprintf(stderr, "Invalid subbands\n");
+ exit(1);
+ }
+ break;
+
+ case 'b':
+ bitpool = atoi(optarg);
+ break;
+
+ case 'j':
+ joint = 1;
+ break;
+
+ case 'd':
+ dualchannel = 1;
+ break;
+
+ case 'S':
+ snr = 1;
+ break;
+
+ case 'B':
+ blocks = atoi(optarg);
+ if (blocks != 16 && blocks != 12 &&
+ blocks != 8 && blocks != 4) {
+ fprintf(stderr, "Invalid blocks\n");
+ exit(1);
+ }
+ break;
+
+ default:
+ usage();
+ exit(1);
+ }
+ }
+
+ argc -= optind;
+ argv += optind;
+ optind = 0;
+
+ if (argc < 1) {
+ usage();
+ exit(1);
+ }
+
+ for (i = 0; i < argc; i++)
+ encode(argv[i], subbands, bitpool, joint, dualchannel,
+ snr, blocks);
+
+ return 0;
+}
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