blob: dabdff4baf8990153538e16236002a33344069d9 [file] [log] [blame]
/*
*
* Bluetooth low-complexity, subband codec (SBC) encoder
*
* Copyright (C) 2008-2010 Nokia Corporation
* Copyright (C) 2004-2010 Marcel Holtmann <marcel@holtmann.org>
* Copyright (C) 2012-2013 Intel Corporation
*
*
* 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 <stdbool.h>
#include <stdint.h>
#include <string.h>
#include <getopt.h>
#include <sys/stat.h>
#include "sbc/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, bool msbc)
{
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;
}
if (!msbc) {
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;
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;
} else {
if (BE_INT(au_hdr.sample_rate) != 16000 ||
BE_INT(au_hdr.channels) != 1 ||
BE_INT(au_hdr.channels) != 1) {
fprintf(stderr, "mSBC requires 16 bits, 16kHz, mono "
"input\n");
goto done;
}
sbc_init_msbc(&sbc, 0);
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;
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-m, --msbc mSBC codec\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' },
{ "msbc", 0, 0, 'm' },
{ "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;
bool msbc = false;
while ((opt = getopt_long(argc, argv, "+hmvs:b:jdSB:",
main_options, NULL)) != -1) {
switch(opt) {
case 'h':
usage();
exit(0);
case 'v':
verbose = 1;
break;
case 'm':
msbc = true;
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, msbc);
return 0;
}