diff options
Diffstat (limited to 'audio/filter/af_delay.c')
| -rw-r--r-- | audio/filter/af_delay.c | 194 |
1 files changed, 0 insertions, 194 deletions
diff --git a/audio/filter/af_delay.c b/audio/filter/af_delay.c deleted file mode 100644 index 8d1cca8a72..0000000000 --- a/audio/filter/af_delay.c +++ /dev/null @@ -1,194 +0,0 @@ -/* - * This audio filter delays the output signal for the different - * channels and can be used for simple position panning. - * An extension for this filter would be a reverb. - * - * Original author: Anders - * - * 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 "common/common.h" -#include "af.h" - -#define L 65536 - -#define UPDATEQI(qi) qi=(qi+1)&(L-1) - -// Data for specific instances of this filter -typedef struct af_delay_s -{ - void* q[AF_NCH]; // Circular queues used for delaying audio signal - int wi[AF_NCH]; // Write index - int ri; // Read index - float d[AF_NCH]; // Delay [ms] - char *delaystr; -}af_delay_t; - -// Initialization and runtime control -static int control(struct af_instance* af, int cmd, void* arg) -{ - af_delay_t* s = af->priv; - switch(cmd){ - case AF_CONTROL_REINIT:{ - int i; - struct mp_audio *in = arg; - - if (in->bps != 1 && in->bps != 2 && in->bps != 4) { - MP_FATAL(af, "Sample format not supported\n"); - return AF_ERROR; - } - - // Free prevous delay queues - for(i=0;i<af->data->nch;i++) - free(s->q[i]); - - mp_audio_force_interleaved_format(in); - mp_audio_copy_config(af->data, in); - - // Allocate new delay queues - for(i=0;i<af->data->nch;i++){ - s->q[i] = calloc(L,af->data->bps); - if(NULL == s->q[i]) - MP_FATAL(af, "Out of memory\n"); - } - - if(AF_OK != af_from_ms(AF_NCH, s->d, s->wi, af->data->rate, 0.0, 1000.0)) - return AF_ERROR; - s->ri = 0; - for(i=0;i<AF_NCH;i++){ - MP_DBG(af, "Channel %i delayed by %0.3fms\n", - i,MPCLAMP(s->d[i],0.0,1000.0)); - MP_TRACE(af, "Channel %i delayed by %i samples\n", - i,s->wi[i]); - } - return AF_OK; - } - } - return AF_UNKNOWN; -} - -// Deallocate memory -static void uninit(struct af_instance* af) -{ - int i; - - for(i=0;i<AF_NCH;i++) - free(((af_delay_t*)(af->priv))->q[i]); -} - -static int filter_frame(struct af_instance *af, struct mp_audio *c) -{ - if (!c) - return 0; - af_delay_t* s = af->priv; // Setup for this instance - int nch = c->nch; // Number of channels - int len = mp_audio_psize(c)/c->bps; // Number of sample in data chunk - int ri = 0; - int ch,i; - if (af_make_writeable(af, c) < 0) { - talloc_free(c); - return -1; - } - for(ch=0;ch<nch;ch++){ - switch(c->bps){ - case 1:{ - int8_t* a = c->planes[0]; - int8_t* q = s->q[ch]; - int wi = s->wi[ch]; - ri = s->ri; - for(i=ch;i<len;i+=nch){ - q[wi] = a[i]; - a[i] = q[ri]; - UPDATEQI(wi); - UPDATEQI(ri); - } - s->wi[ch] = wi; - break; - } - case 2:{ - int16_t* a = c->planes[0]; - int16_t* q = s->q[ch]; - int wi = s->wi[ch]; - ri = s->ri; - for(i=ch;i<len;i+=nch){ - q[wi] = a[i]; - a[i] = q[ri]; - UPDATEQI(wi); - UPDATEQI(ri); - } - s->wi[ch] = wi; - break; - } - case 4:{ - int32_t* a = c->planes[0]; - int32_t* q = s->q[ch]; - int wi = s->wi[ch]; - ri = s->ri; - for(i=ch;i<len;i+=nch){ - q[wi] = a[i]; - a[i] = q[ri]; - UPDATEQI(wi); - UPDATEQI(ri); - } - s->wi[ch] = wi; - break; - } - } - } - s->ri = ri; - af_add_output_frame(af, c); - return 0; -} - -// Allocate memory and set function pointers -static int af_open(struct af_instance* af){ - af->control=control; - af->uninit=uninit; - af->filter_frame = filter_frame; - af_delay_t *s = af->priv; - int n = 1; - int i = 0; - char* cl = s->delaystr; - while(cl && n && i < AF_NCH ){ - sscanf(cl,"%f%n",&s->d[i],&n); - if(n==0 || cl[n-1] == '\0') - break; - cl=&cl[n]; - if (*cl != ',') - break; - cl++; - i++; - } - return AF_OK; -} - -#define OPT_BASE_STRUCT af_delay_t -const struct af_info af_info_delay = { - .info = "Delay audio filter", - .name = "delay", - .open = af_open, - .priv_size = sizeof(af_delay_t), - .options = (const struct m_option[]) { - OPT_STRING("delays", delaystr, 0), - {0} - }, -}; |