mirror of https://github.com/mpv-player/mpv
217 lines
6.6 KiB
C
217 lines
6.6 KiB
C
/*
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* The Bauer stereophonic-to-binaural DSP using bs2b library:
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* http://bs2b.sourceforge.net/
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*
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* Copyright (c) 2009 Andrew Savchenko
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*
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* This file is part of MPlayer.
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*
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* MPlayer is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* MPlayer is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License along
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* with MPlayer; if not, write to the Free Software Foundation, Inc.,
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* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
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*/
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#include <bs2b.h>
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#include <inttypes.h>
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#include <stdlib.h>
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#include <string.h>
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#include "af.h"
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#include "mpvcore/m_option.h"
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/// Internal specific data of the filter
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struct af_bs2b {
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int fcut; ///< cut frequency in Hz
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int feed; ///< feed level for low frequencies in 0.1*dB
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int profile ; ///< profile (available crossfeed presets)
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t_bs2bdp filter; ///< instance of a library filter
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};
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#define PLAY(name, type) \
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static struct mp_audio *play_##name(struct af_instance *af, struct mp_audio *data) \
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{ \
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/* filter is called for all pairs of samples available in the buffer */ \
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bs2b_cross_feed_##name(((struct af_bs2b*)(af->priv))->filter, \
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(type*)(data->audio), data->len/data->bps/2); \
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\
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return data; \
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}
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PLAY(f, float)
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PLAY(fbe, float)
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PLAY(fle, float)
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PLAY(s32be, int32_t)
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PLAY(u32be, uint32_t)
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PLAY(s32le, int32_t)
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PLAY(u32le, uint32_t)
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PLAY(s24be, bs2b_int24_t)
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PLAY(u24be, bs2b_uint24_t)
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PLAY(s24le, bs2b_int24_t)
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PLAY(u24le, bs2b_uint24_t)
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PLAY(s16be, int16_t)
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PLAY(u16be, uint16_t)
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PLAY(s16le, int16_t)
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PLAY(u16le, uint16_t)
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PLAY(s8, int8_t)
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PLAY(u8, uint8_t)
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/// Initialization and runtime control
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static int control(struct af_instance *af, int cmd, void *arg)
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{
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struct af_bs2b *s = af->priv;
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switch (cmd) {
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case AF_CONTROL_REINIT: {
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int format;
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char buf[256];
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// Sanity check
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if (!arg) return AF_ERROR;
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format = ((struct mp_audio*)arg)->format;
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af->data->rate = ((struct mp_audio*)arg)->rate;
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mp_audio_set_num_channels(af->data, 2); // bs2b is useful only for 2ch audio
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mp_audio_set_format(af->data, format);
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/* check for formats supported by libbs2b
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and assign corresponding handlers */
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switch (format) {
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case AF_FORMAT_FLOAT_BE:
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af->play = play_fbe;
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break;
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case AF_FORMAT_FLOAT_LE:
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af->play = play_fle;
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break;
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case AF_FORMAT_S32_BE:
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af->play = play_s32be;
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break;
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case AF_FORMAT_U32_BE:
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af->play = play_u32be;
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break;
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case AF_FORMAT_S32_LE:
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af->play = play_s32le;
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break;
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case AF_FORMAT_U32_LE:
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af->play = play_u32le;
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break;
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case AF_FORMAT_S24_BE:
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af->play = play_s24be;
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break;
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case AF_FORMAT_U24_BE:
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af->play = play_u24be;
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break;
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case AF_FORMAT_S24_LE:
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af->play = play_s24le;
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break;
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case AF_FORMAT_U24_LE:
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af->play = play_u24le;
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break;
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case AF_FORMAT_S16_BE:
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af->play = play_s16be;
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break;
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case AF_FORMAT_U16_BE:
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af->play = play_u16be;
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break;
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case AF_FORMAT_S16_LE:
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af->play = play_s16le;
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break;
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case AF_FORMAT_U16_LE:
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af->play = play_u16le;
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break;
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case AF_FORMAT_S8:
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af->play = play_s8;
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break;
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case AF_FORMAT_U8:
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af->play = play_u8;
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break;
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default:
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af->play = play_f;
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mp_audio_set_format(af->data, AF_FORMAT_FLOAT_NE);
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break;
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}
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// bs2b have srate limits, try to resample if needed
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if (af->data->rate > BS2B_MAXSRATE || af->data->rate < BS2B_MINSRATE) {
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af->data->rate = BS2B_DEFAULT_SRATE;
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mp_msg(MSGT_AFILTER, MSGL_WARN,
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"[bs2b] Requested sample rate %d Hz is out of bounds [%d..%d] Hz.\n"
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"[bs2b] Trying to resample to %d Hz.\n",
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af->data->rate, BS2B_MINSRATE, BS2B_MAXSRATE, BS2B_DEFAULT_SRATE);
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}
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bs2b_set_srate(s->filter, (long)af->data->rate);
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mp_msg(MSGT_AFILTER, MSGL_V, "[bs2b] using format %s\n",
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af_fmt2str(af->data->format,buf,256));
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return af_test_output(af,(struct mp_audio*)arg);
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}
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}
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return AF_UNKNOWN;
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}
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/// Deallocate memory and close library
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static void uninit(struct af_instance *af)
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{
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struct af_bs2b *s = af->priv;
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free(af->data);
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if (s->filter)
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bs2b_close(s->filter);
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}
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/// Allocate memory, set function pointers and init library
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static int af_open(struct af_instance *af)
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{
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struct af_bs2b *s = af->priv;
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af->control = control;
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af->uninit = uninit;
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af->mul = 1;
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if (!(af->data = calloc(1, sizeof(struct mp_audio))))
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return AF_ERROR;
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// NULL means failed initialization
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if (!(s->filter = bs2b_open())) {
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free(af->data);
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return AF_ERROR;
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}
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if (s->profile)
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bs2b_set_level(s->filter, s->profile);
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// set fcut and feed only if specified, otherwise defaults will be used
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if (s->fcut)
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bs2b_set_level_fcut(s->filter, s->fcut);
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if (s->feed)
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bs2b_set_level_feed(s->filter, s->feed);
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return AF_OK;
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}
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#define OPT_BASE_STRUCT struct af_bs2b
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/// Description of this filter
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struct af_info af_info_bs2b = {
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"Bauer stereophonic-to-binaural audio filter",
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"bs2b",
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"Andrew Savchenko",
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"",
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AF_FLAGS_REENTRANT,
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af_open,
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.priv_size = sizeof(struct af_bs2b),
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.options = (const struct m_option[]) {
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OPT_INTRANGE("fcut", fcut, 0, BS2B_MINFCUT, BS2B_MAXFCUT),
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OPT_INTRANGE("feed", feed, 0, BS2B_MINFEED, BS2B_MAXFEED),
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OPT_CHOICE("profile", profile, 0,
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({"default", BS2B_DEFAULT_CLEVEL},
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{"cmoy", BS2B_CMOY_CLEVEL},
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{"jmeier", BS2B_JMEIER_CLEVEL})),
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{0}
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},
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};
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