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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 <string.h>
#include "af.h"
#include "subopt-helper.h"
/// Internal specific data of the filter
struct af_bs2b {
int fcut; ///< cut frequency in Hz
int feed; ///< feed level for low frequencies in 0.1*dB
char *profile; ///< profile (available crossfeed presets)
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(f, float)
PLAY(fbe, float)
PLAY(fle, float)
PLAY(s32be, int32_t)
PLAY(u32be, uint32_t)
PLAY(s32le, int32_t)
PLAY(u32le, uint32_t)
PLAY(s24be, bs2b_int24_t)
PLAY(u24be, bs2b_uint24_t)
PLAY(s24le, bs2b_int24_t)
PLAY(u24le, bs2b_uint24_t)
PLAY(s16be, int16_t)
PLAY(u16be, uint16_t)
PLAY(s16le, int16_t)
PLAY(u16le, uint16_t)
PLAY(s8, int8_t)
PLAY(u8, uint8_t)
/// Sanity check for fcut value
static int test_fcut(void *par)
{
const int val = *(int*)par;
if (val >= BS2B_MINFCUT && val <= BS2B_MAXFCUT)
return 1;
mp_msg(MSGT_AFILTER, MSGL_ERR,
"[bs2b] Cut frequency must be in range [%d..%d], but current value is %d.\n",
BS2B_MINFCUT, BS2B_MAXFCUT, val);
return 0;
}
/// Sanity check for feed value
static int test_feed(void *par)
{
const int val = *(int*)par;
if (val >= BS2B_MINFEED && val <= BS2B_MAXFEED)
return 1;
mp_msg(MSGT_AFILTER, MSGL_ERR,
"[bs2b] Feed level must be in range [%d..%d], but current value is %d.\n",
BS2B_MINFEED, BS2B_MAXFEED, 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_U32_BE:
af->play = play_u32be;
break;
case AF_FORMAT_S32_LE:
af->play = play_s32le;
break;
case AF_FORMAT_U32_LE:
af->play = play_u32le;
break;
case AF_FORMAT_S24_BE:
af->play = play_s24be;
break;
case AF_FORMAT_U24_BE:
af->play = play_u24be;
break;
case AF_FORMAT_S24_LE:
af->play = play_s24le;
break;
case AF_FORMAT_U24_LE:
af->play = play_u24le;
break;
case AF_FORMAT_S16_BE:
af->play = play_s16be;
break;
case AF_FORMAT_U16_BE:
af->play = play_u16be;
break;
case AF_FORMAT_S16_LE:
af->play = play_s16le;
break;
case AF_FORMAT_U16_LE:
af->play = play_u16le;
break;
case AF_FORMAT_S8:
af->play = play_s8;
break;
case AF_FORMAT_U8:
af->play = play_u8;
break;
default:
af->play = play_f;
af->data->format = AF_FORMAT_FLOAT_NE;
af->data->bps = 4;
break;
}
// bs2b have srate limits, try to resample if needed
if (af->data->rate > BS2B_MAXSRATE || af->data->rate < BS2B_MINSRATE) {
af->data->rate = BS2B_DEFAULT_SRATE;
mp_msg(MSGT_AFILTER, MSGL_WARN,
"[bs2b] Requested sample rate %d Hz is out of bounds [%d..%d] Hz.\n"
"[bs2b] Trying to resample to %d Hz.\n",
af->data->rate, BS2B_MINSRATE, BS2B_MAXSRATE, BS2B_DEFAULT_SRATE);
}
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[] = {
{"fcut", OPT_ARG_INT, &s->fcut, test_fcut},
{"feed", OPT_ARG_INT, &s->feed, test_feed},
{"profile", OPT_ARG_MSTRZ, &s->profile, NULL},
{NULL}
};
if (subopt_parse(arg, subopts) != 0) {
mp_msg(MSGT_AFILTER, MSGL_ERR, "[bs2b] Invalid option specified.\n");
free(s->profile);
return AF_ERROR;
}
// parse profile if specified
if (s->profile) {
if (!strcmp(s->profile, "default"))
bs2b_set_level(s->filter, BS2B_DEFAULT_CLEVEL);
else if (!strcmp(s->profile, "cmoy"))
bs2b_set_level(s->filter, BS2B_CMOY_CLEVEL);
else if (!strcmp(s->profile, "jmeier"))
bs2b_set_level(s->filter, BS2B_JMEIER_CLEVEL);
else {
mp_msg(MSGT_AFILTER, MSGL_ERR,
"[bs2b] Invalid profile specified: %s.\n"
"[bs2b] Available profiles are: default, cmoy, jmeier.\n",
s->profile);
free(s->profile);
return AF_ERROR;
}
}
// set fcut and feed only if specified, otherwise defaults will be used
if (s->fcut)
bs2b_set_level_fcut(s->filter, s->fcut);
if (s->feed)
bs2b_set_level_feed(s->filter, s->feed);
mp_msg(MSGT_AFILTER, MSGL_V,
"[bs2b] using cut frequency %d, LF feed level %d\n",
bs2b_get_level_fcut(s->filter), bs2b_get_level_feed(s->filter));
free(s->profile);
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 zero defaults indicating no option was specified.
s->profile = NULL;
s->fcut = 0;
s->feed = 0;
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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