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-rw-r--r--libaf/af_bs2b.c215
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diff --git a/libaf/af_bs2b.c b/libaf/af_bs2b.c
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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
+};