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Diffstat (limited to 'libaf/af_bs2b.c')
| -rw-r--r-- | libaf/af_bs2b.c | 215 |
1 files changed, 215 insertions, 0 deletions
diff --git a/libaf/af_bs2b.c b/libaf/af_bs2b.c new file mode 100644 index 0000000000..e47e669635 --- /dev/null +++ b/libaf/af_bs2b.c @@ -0,0 +1,215 @@ +/* + * 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 +}; |