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/*
* The Bauer stereophonic-to-binaural DSP using bs2b library:
* http://bs2b.sourceforge.net/
*
* Copyright (c) 2009 Andrew Savchenko
*
* This file is part of MPlayer.
*
* MPlayer 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.
*
* MPlayer 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 MPlayer; if not, write to the Free Software Foundation, Inc.,
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*/
#include <bs2b.h>
#include <inttypes.h>
#include <stdlib.h>
#include "af.h"
#include "subopt-helper.h"
/// Internal specific data of the filter
struct af_bs2b {
int level; ///< crossfeed level
int profile; ///< profile (easy or normal)
t_bs2bdp filter; ///< instance of a library filter
};
#define PLAY(name,type) \
static af_data_t *play_##name(struct af_instance_s *af, af_data_t *data) \
{ \
/* filter is called for all pairs of samples available in the buffer */ \
bs2b_cross_feed_##name(((struct af_bs2b*)(af->setup))->filter, \
(type*)(data->audio), data->len/data->bps/2); \
\
return data; \
}
PLAY(fbe,float)
PLAY(fle,float)
PLAY(s32be,int32_t)
PLAY(s32le,int32_t)
PLAY(s24be,bs2b_int24_t)
PLAY(s24le,bs2b_int24_t)
PLAY(s16be,int16_t)
PLAY(s16le,int16_t)
PLAY(s8,int8_t)
PLAY(u8,uint8_t)
/// Sanity check for level value
static int test_level(void *par)
{
const int val = *(int*)par;
if (val >= 1 && val <= BS2B_CLEVELS)
return 1;
mp_msg(MSGT_AFILTER,MSGL_ERR, "[bs2b] Level must be in range 1..%i, but "
"current value is %i.\n", BS2B_CLEVELS, val);
return 0;
}
/// Sanity check for profile value
static int test_profile(void *par)
{
const int val = *(int*)par;
if (val >= 0 && val <= 1)
return 1;
mp_msg(MSGT_AFILTER,MSGL_ERR, "[bs2b] Profile must be either 0 or 1, but "
"current value is %i.\n", val);
return 0;
}
/// Initialization and runtime control
static int control(struct af_instance_s *af, int cmd, void *arg)
{
struct af_bs2b *s = af->setup;
switch (cmd) {
case AF_CONTROL_REINIT: {
int format;
char buf[256];
// Sanity check
if (!arg) return AF_ERROR;
format = ((af_data_t*)arg)->format;
af->data->rate = ((af_data_t*)arg)->rate;
af->data->nch = 2; // bs2b is useful only for 2ch audio
af->data->bps = ((af_data_t*)arg)->bps;
af->data->format = format;
/* check for formats supported by libbs2b
and assign corresponding handlers */
switch (format) {
case AF_FORMAT_FLOAT_BE:
af->play = play_fbe;
break;
case AF_FORMAT_FLOAT_LE:
af->play = play_fle;
break;
case AF_FORMAT_S32_BE:
af->play = play_s32be;
break;
case AF_FORMAT_S32_LE:
af->play = play_s32le;
break;
case AF_FORMAT_S24_BE:
af->play = play_s24be;
break;
case AF_FORMAT_S24_LE:
af->play = play_s24le;
break;
case AF_FORMAT_S16_BE:
af->play = play_s16be;
break;
case AF_FORMAT_S16_LE:
af->play = play_s16le;
break;
case AF_FORMAT_S8:
af->play = play_s8;
break;
case AF_FORMAT_U8:
af->play = play_u8;
break;
default:
#ifdef WORDS_BIGENDIAN
af->play = play_fbe;
#else
af->play = play_fle;
#endif //WORDS_BIGENDIAN
af->data->format = AF_FORMAT_FLOAT_NE;
af->data->bps=4;
break;
}
bs2b_set_srate(s->filter, (long)af->data->rate);
mp_msg(MSGT_AFILTER,MSGL_V, "[bs2b] using format %s\n",
af_fmt2str(af->data->format,buf,256));
return af_test_output(af,(af_data_t*)arg);
}
case AF_CONTROL_COMMAND_LINE: {
const opt_t subopts[] = {
{"level", OPT_ARG_INT, &s->level, test_level},
{"profile", OPT_ARG_INT, &s->profile, test_profile},
{NULL}
};
if (subopt_parse(arg, subopts) != 0) {
mp_msg(MSGT_AFILTER,MSGL_ERR, "[bs2b] Invalid option specified.\n");
return AF_ERROR;
}
bs2b_set_level(s->filter, s->level + s->profile ? BS2B_CLEVELS : 0);
mp_msg(MSGT_AFILTER,MSGL_V, "[bs2b] using profile %i, level %i\n",
s->profile, s->level);
return AF_OK;
}
}
return AF_UNKNOWN;
}
/// Deallocate memory and close library
static void uninit(struct af_instance_s *af)
{
struct af_bs2b *s = af->setup;
free(af->data);
if (s && s->filter)
bs2b_close(s->filter);
free(s);
}
/// Allocate memory, set function pointers and init library
static int af_open(af_instance_t *af)
{
struct af_bs2b *s;
af->control = control;
af->uninit = uninit;
af->mul = 1;
if (!(af->data = calloc(1,sizeof(af_data_t))))
return AF_ERROR;
if (!(af->setup = s = calloc(1,sizeof(struct af_bs2b)))) {
free(af->data);
return AF_ERROR;
}
// NULL means failed initialization
if (!(s->filter = bs2b_open())) {
free(af->data);
free(af->setup);
return AF_ERROR;
}
// Set defaults the same as in the library:
s->level = 3;
s->profile = 1;
return AF_OK;
}
/// Description of this filter
af_info_t af_info_bs2b = {
"Bauer stereophonic-to-binaural audio filter",
"bs2b",
"Andrew Savchenko",
"",
AF_FLAGS_REENTRANT,
af_open
};
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