diff options
Diffstat (limited to 'audio/filter/af_extrastereo.c')
-rw-r--r-- | audio/filter/af_extrastereo.c | 132 |
1 files changed, 0 insertions, 132 deletions
diff --git a/audio/filter/af_extrastereo.c b/audio/filter/af_extrastereo.c deleted file mode 100644 index 49222ebfdc..0000000000 --- a/audio/filter/af_extrastereo.c +++ /dev/null @@ -1,132 +0,0 @@ -/* - * Copyright (C) 2004 Alex Beregszaszi & Pierre Lombard - * - * This file is part of mpv. - * - * mpv 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. - * - * mpv 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 mpv. If not, see <http://www.gnu.org/licenses/>. - */ - -#include <stdio.h> -#include <stdlib.h> -#include <string.h> - -#include <inttypes.h> -#include <math.h> -#include <limits.h> - -#include "common/common.h" -#include "af.h" - -// Data for specific instances of this filter -typedef struct af_extrastereo_s -{ - float mul; -}af_extrastereo_t; - -// Initialization and runtime control -static int control(struct af_instance* af, int cmd, void* arg) -{ - switch(cmd){ - case AF_CONTROL_REINIT:{ - // Sanity check - if(!arg) return AF_ERROR; - - mp_audio_copy_config(af->data, (struct mp_audio*)arg); - mp_audio_force_interleaved_format(af->data); - mp_audio_set_num_channels(af->data, 2); - if (af->data->format != AF_FORMAT_FLOAT) - mp_audio_set_format(af->data, AF_FORMAT_S16); - - return af_test_output(af,(struct mp_audio*)arg); - } - } - return AF_UNKNOWN; -} - -// Filter data through filter -static void play_s16(af_extrastereo_t *s, struct mp_audio* data) -{ - register int i = 0; - int16_t *a = (int16_t*)data->planes[0]; // Audio data - int len = data->samples*data->nch; // Number of samples - int avg, l, r; - - for (i = 0; i < len; i+=2) - { - avg = (a[i] + a[i + 1]) / 2; - - l = avg + (int)(s->mul * (a[i] - avg)); - r = avg + (int)(s->mul * (a[i + 1] - avg)); - - a[i] = MPCLAMP(l, SHRT_MIN, SHRT_MAX); - a[i + 1] = MPCLAMP(r, SHRT_MIN, SHRT_MAX); - } -} - -static void play_float(af_extrastereo_t *s, struct mp_audio* data) -{ - register int i = 0; - float *a = (float*)data->planes[0]; // Audio data - int len = data->samples * data->nch; // Number of samples - float avg, l, r; - - for (i = 0; i < len; i+=2) - { - avg = (a[i] + a[i + 1]) / 2; - - l = avg + (s->mul * (a[i] - avg)); - r = avg + (s->mul * (a[i + 1] - avg)); - - a[i] = af_softclip(l); - a[i + 1] = af_softclip(r); - } -} - -static int filter_frame(struct af_instance *af, struct mp_audio *data) -{ - if (!data) - return 0; - if (af_make_writeable(af, data) < 0) { - talloc_free(data); - return -1; - } - if (data->format == AF_FORMAT_FLOAT) { - play_float(af->priv, data); - } else { - play_s16(af->priv, data); - } - af_add_output_frame(af, data); - return 0; -} - -// Allocate memory and set function pointers -static int af_open(struct af_instance* af){ - af->control=control; - af->filter_frame = filter_frame; - - return AF_OK; -} - -#define OPT_BASE_STRUCT af_extrastereo_t -const struct af_info af_info_extrastereo = { - .info = "Increase difference between audio channels", - .name = "extrastereo", - .flags = AF_FLAGS_NOT_REENTRANT, - .open = af_open, - .priv_size = sizeof(af_extrastereo_t), - .options = (const struct m_option[]) { - OPT_FLOAT("mul", mul, 0, OPTDEF_FLOAT(2.5)), - {0} - }, -}; |