2017-06-07 19:23:14 +00:00
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/*
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* Copyright (C) 2017 Paul B Mahol
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* Copyright (C) 2013-2015 Andreas Fuchs, Wolfgang Hrauda
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* This file is part of FFmpeg.
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*
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* FFmpeg is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* FFmpeg 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 GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with FFmpeg; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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#include <math.h>
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#include "libavutil/audio_fifo.h"
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#include "libavutil/avstring.h"
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#include "libavutil/channel_layout.h"
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#include "libavutil/float_dsp.h"
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#include "libavutil/intmath.h"
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#include "libavutil/opt.h"
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#include "libavcodec/avfft.h"
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#include "avfilter.h"
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2018-04-16 14:08:55 +00:00
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#include "filters.h"
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2017-06-07 19:23:14 +00:00
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#include "internal.h"
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#include "audio.h"
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#define TIME_DOMAIN 0
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#define FREQUENCY_DOMAIN 1
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2018-04-15 10:48:12 +00:00
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#define HRIR_STEREO 0
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#define HRIR_MULTI 1
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2017-06-07 19:23:14 +00:00
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typedef struct HeadphoneContext {
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const AVClass *class;
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char *map;
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int type;
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int lfe_channel;
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int have_hrirs;
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int eof_hrirs;
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int ir_len;
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int mapping[64];
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int nb_inputs;
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int nb_irs;
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float gain;
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float lfe_gain, gain_lfe;
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float *ringbuffer[2];
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int write[2];
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int buffer_length;
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int n_fft;
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int size;
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2018-04-15 10:48:12 +00:00
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int hrir_fmt;
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2017-06-07 19:23:14 +00:00
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int *delay[2];
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float *data_ir[2];
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float *temp_src[2];
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FFTComplex *temp_fft[2];
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FFTContext *fft[2], *ifft[2];
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FFTComplex *data_hrtf[2];
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AVFloatDSPContext *fdsp;
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struct headphone_inputs {
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AVAudioFifo *fifo;
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AVFrame *frame;
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int ir_len;
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int delay_l;
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int delay_r;
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int eof;
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} *in;
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} HeadphoneContext;
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static int parse_channel_name(HeadphoneContext *s, int x, char **arg, int *rchannel, char *buf)
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{
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int len, i, channel_id = 0;
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int64_t layout, layout0;
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if (sscanf(*arg, "%7[A-Z]%n", buf, &len)) {
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layout0 = layout = av_get_channel_layout(buf);
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if (layout == AV_CH_LOW_FREQUENCY)
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s->lfe_channel = x;
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for (i = 32; i > 0; i >>= 1) {
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if (layout >= 1LL << i) {
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channel_id += i;
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layout >>= i;
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}
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}
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if (channel_id >= 64 || layout0 != 1LL << channel_id)
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return AVERROR(EINVAL);
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*rchannel = channel_id;
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*arg += len;
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return 0;
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}
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return AVERROR(EINVAL);
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}
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static void parse_map(AVFilterContext *ctx)
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{
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HeadphoneContext *s = ctx->priv;
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char *arg, *tokenizer, *p, *args = av_strdup(s->map);
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int i;
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if (!args)
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return;
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p = args;
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s->lfe_channel = -1;
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s->nb_inputs = 1;
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for (i = 0; i < 64; i++) {
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s->mapping[i] = -1;
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}
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while ((arg = av_strtok(p, "|", &tokenizer))) {
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int out_ch_id;
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char buf[8];
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p = NULL;
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2018-04-15 10:48:12 +00:00
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if (parse_channel_name(s, s->nb_irs, &arg, &out_ch_id, buf)) {
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2017-06-07 19:23:14 +00:00
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av_log(ctx, AV_LOG_WARNING, "Failed to parse \'%s\' as channel name.\n", buf);
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continue;
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}
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2018-04-15 10:48:12 +00:00
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s->mapping[s->nb_irs] = out_ch_id;
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s->nb_irs++;
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2017-06-07 19:23:14 +00:00
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}
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2018-04-15 10:48:12 +00:00
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if (s->hrir_fmt == HRIR_MULTI)
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s->nb_inputs = 2;
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else
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s->nb_inputs = s->nb_irs + 1;
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2017-06-07 19:23:14 +00:00
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av_free(args);
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}
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typedef struct ThreadData {
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AVFrame *in, *out;
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int *write;
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int **delay;
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float **ir;
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int *n_clippings;
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float **ringbuffer;
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float **temp_src;
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FFTComplex **temp_fft;
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} ThreadData;
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static int headphone_convolute(AVFilterContext *ctx, void *arg, int jobnr, int nb_jobs)
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{
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HeadphoneContext *s = ctx->priv;
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ThreadData *td = arg;
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AVFrame *in = td->in, *out = td->out;
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int offset = jobnr;
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int *write = &td->write[jobnr];
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const int *const delay = td->delay[jobnr];
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const float *const ir = td->ir[jobnr];
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int *n_clippings = &td->n_clippings[jobnr];
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float *ringbuffer = td->ringbuffer[jobnr];
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float *temp_src = td->temp_src[jobnr];
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const int ir_len = s->ir_len;
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const float *src = (const float *)in->data[0];
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float *dst = (float *)out->data[0];
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const int in_channels = in->channels;
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const int buffer_length = s->buffer_length;
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const uint32_t modulo = (uint32_t)buffer_length - 1;
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float *buffer[16];
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int wr = *write;
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int read;
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int i, l;
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dst += offset;
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for (l = 0; l < in_channels; l++) {
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buffer[l] = ringbuffer + l * buffer_length;
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}
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for (i = 0; i < in->nb_samples; i++) {
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const float *temp_ir = ir;
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*dst = 0;
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for (l = 0; l < in_channels; l++) {
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*(buffer[l] + wr) = src[l];
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}
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for (l = 0; l < in_channels; l++) {
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const float *const bptr = buffer[l];
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if (l == s->lfe_channel) {
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*dst += *(buffer[s->lfe_channel] + wr) * s->gain_lfe;
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temp_ir += FFALIGN(ir_len, 16);
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continue;
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}
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read = (wr - *(delay + l) - (ir_len - 1) + buffer_length) & modulo;
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if (read + ir_len < buffer_length) {
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memcpy(temp_src, bptr + read, ir_len * sizeof(*temp_src));
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} else {
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int len = FFMIN(ir_len - (read % ir_len), buffer_length - read);
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memcpy(temp_src, bptr + read, len * sizeof(*temp_src));
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memcpy(temp_src + len, bptr, (ir_len - len) * sizeof(*temp_src));
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}
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dst[0] += s->fdsp->scalarproduct_float(temp_ir, temp_src, ir_len);
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temp_ir += FFALIGN(ir_len, 16);
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}
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if (fabs(*dst) > 1)
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*n_clippings += 1;
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dst += 2;
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src += in_channels;
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wr = (wr + 1) & modulo;
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}
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*write = wr;
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return 0;
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}
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static int headphone_fast_convolute(AVFilterContext *ctx, void *arg, int jobnr, int nb_jobs)
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{
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HeadphoneContext *s = ctx->priv;
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ThreadData *td = arg;
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AVFrame *in = td->in, *out = td->out;
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int offset = jobnr;
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int *write = &td->write[jobnr];
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FFTComplex *hrtf = s->data_hrtf[jobnr];
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int *n_clippings = &td->n_clippings[jobnr];
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float *ringbuffer = td->ringbuffer[jobnr];
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const int ir_len = s->ir_len;
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const float *src = (const float *)in->data[0];
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float *dst = (float *)out->data[0];
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const int in_channels = in->channels;
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const int buffer_length = s->buffer_length;
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const uint32_t modulo = (uint32_t)buffer_length - 1;
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FFTComplex *fft_in = s->temp_fft[jobnr];
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FFTContext *ifft = s->ifft[jobnr];
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FFTContext *fft = s->fft[jobnr];
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const int n_fft = s->n_fft;
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const float fft_scale = 1.0f / s->n_fft;
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FFTComplex *hrtf_offset;
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int wr = *write;
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int n_read;
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int i, j;
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dst += offset;
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n_read = FFMIN(s->ir_len, in->nb_samples);
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for (j = 0; j < n_read; j++) {
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dst[2 * j] = ringbuffer[wr];
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ringbuffer[wr] = 0.0;
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wr = (wr + 1) & modulo;
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}
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for (j = n_read; j < in->nb_samples; j++) {
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dst[2 * j] = 0;
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}
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for (i = 0; i < in_channels; i++) {
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if (i == s->lfe_channel) {
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for (j = 0; j < in->nb_samples; j++) {
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dst[2 * j] += src[i + j * in_channels] * s->gain_lfe;
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}
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continue;
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}
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offset = i * n_fft;
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hrtf_offset = hrtf + offset;
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memset(fft_in, 0, sizeof(FFTComplex) * n_fft);
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for (j = 0; j < in->nb_samples; j++) {
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fft_in[j].re = src[j * in_channels + i];
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}
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av_fft_permute(fft, fft_in);
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av_fft_calc(fft, fft_in);
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for (j = 0; j < n_fft; j++) {
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const FFTComplex *hcomplex = hrtf_offset + j;
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const float re = fft_in[j].re;
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const float im = fft_in[j].im;
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fft_in[j].re = re * hcomplex->re - im * hcomplex->im;
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fft_in[j].im = re * hcomplex->im + im * hcomplex->re;
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}
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av_fft_permute(ifft, fft_in);
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av_fft_calc(ifft, fft_in);
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for (j = 0; j < in->nb_samples; j++) {
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dst[2 * j] += fft_in[j].re * fft_scale;
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}
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for (j = 0; j < ir_len - 1; j++) {
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int write_pos = (wr + j) & modulo;
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*(ringbuffer + write_pos) += fft_in[in->nb_samples + j].re * fft_scale;
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}
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}
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for (i = 0; i < out->nb_samples; i++) {
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if (fabs(*dst) > 1) {
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n_clippings[0]++;
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}
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dst += 2;
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}
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*write = wr;
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return 0;
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}
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2018-04-16 14:08:55 +00:00
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static int read_ir(AVFilterLink *inlink, int input_number, AVFrame *frame)
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2017-06-07 19:23:14 +00:00
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{
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AVFilterContext *ctx = inlink->dst;
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HeadphoneContext *s = ctx->priv;
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2018-04-16 14:08:55 +00:00
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int ir_len, max_ir_len, ret;
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2017-06-07 19:23:14 +00:00
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2017-11-20 12:37:24 +00:00
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ret = av_audio_fifo_write(s->in[input_number].fifo, (void **)frame->extended_data,
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frame->nb_samples);
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2017-06-07 19:23:14 +00:00
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av_frame_free(&frame);
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2017-11-20 12:37:24 +00:00
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if (ret < 0)
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return ret;
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2017-06-07 19:23:14 +00:00
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ir_len = av_audio_fifo_size(s->in[input_number].fifo);
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2017-09-25 10:12:13 +00:00
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max_ir_len = 65536;
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2017-06-07 19:23:14 +00:00
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if (ir_len > max_ir_len) {
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av_log(ctx, AV_LOG_ERROR, "Too big length of IRs: %d > %d.\n", ir_len, max_ir_len);
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return AVERROR(EINVAL);
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}
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s->in[input_number].ir_len = ir_len;
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s->ir_len = FFMAX(ir_len, s->ir_len);
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return 0;
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}
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2018-04-16 14:08:55 +00:00
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static int headphone_frame(HeadphoneContext *s, AVFrame *in, AVFilterLink *outlink)
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2017-06-07 19:23:14 +00:00
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{
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|
|
AVFilterContext *ctx = outlink->src;
|
|
|
|
int n_clippings[2] = { 0 };
|
|
|
|
ThreadData td;
|
|
|
|
AVFrame *out;
|
|
|
|
|
|
|
|
out = ff_get_audio_buffer(outlink, in->nb_samples);
|
2018-04-16 14:08:55 +00:00
|
|
|
if (!out) {
|
|
|
|
av_frame_free(&in);
|
2017-06-07 19:23:14 +00:00
|
|
|
return AVERROR(ENOMEM);
|
2018-04-16 14:08:55 +00:00
|
|
|
}
|
|
|
|
out->pts = in->pts;
|
2017-06-07 19:23:14 +00:00
|
|
|
|
|
|
|
td.in = in; td.out = out; td.write = s->write;
|
|
|
|
td.delay = s->delay; td.ir = s->data_ir; td.n_clippings = n_clippings;
|
|
|
|
td.ringbuffer = s->ringbuffer; td.temp_src = s->temp_src;
|
|
|
|
td.temp_fft = s->temp_fft;
|
|
|
|
|
|
|
|
if (s->type == TIME_DOMAIN) {
|
|
|
|
ctx->internal->execute(ctx, headphone_convolute, &td, NULL, 2);
|
|
|
|
} else {
|
|
|
|
ctx->internal->execute(ctx, headphone_fast_convolute, &td, NULL, 2);
|
|
|
|
}
|
|
|
|
emms_c();
|
|
|
|
|
|
|
|
if (n_clippings[0] + n_clippings[1] > 0) {
|
|
|
|
av_log(ctx, AV_LOG_WARNING, "%d of %d samples clipped. Please reduce gain.\n",
|
|
|
|
n_clippings[0] + n_clippings[1], out->nb_samples * 2);
|
|
|
|
}
|
|
|
|
|
2018-04-16 14:08:55 +00:00
|
|
|
av_frame_free(&in);
|
2017-06-07 19:23:14 +00:00
|
|
|
return ff_filter_frame(outlink, out);
|
|
|
|
}
|
|
|
|
|
|
|
|
static int convert_coeffs(AVFilterContext *ctx, AVFilterLink *inlink)
|
|
|
|
{
|
|
|
|
struct HeadphoneContext *s = ctx->priv;
|
|
|
|
const int ir_len = s->ir_len;
|
|
|
|
int nb_irs = s->nb_irs;
|
|
|
|
int nb_input_channels = ctx->inputs[0]->channels;
|
|
|
|
float gain_lin = expf((s->gain - 3 * nb_input_channels) / 20 * M_LN10);
|
|
|
|
FFTComplex *data_hrtf_l = NULL;
|
|
|
|
FFTComplex *data_hrtf_r = NULL;
|
|
|
|
FFTComplex *fft_in_l = NULL;
|
|
|
|
FFTComplex *fft_in_r = NULL;
|
|
|
|
float *data_ir_l = NULL;
|
|
|
|
float *data_ir_r = NULL;
|
2017-06-15 09:19:12 +00:00
|
|
|
int offset = 0, ret = 0;
|
2017-06-07 19:23:14 +00:00
|
|
|
int n_fft;
|
2018-04-15 10:48:12 +00:00
|
|
|
int i, j, k;
|
2017-06-07 19:23:14 +00:00
|
|
|
|
|
|
|
s->buffer_length = 1 << (32 - ff_clz(s->ir_len));
|
2018-04-14 15:25:06 +00:00
|
|
|
s->n_fft = n_fft = 1 << (32 - ff_clz(s->ir_len + s->size));
|
2017-06-07 19:23:14 +00:00
|
|
|
|
|
|
|
if (s->type == FREQUENCY_DOMAIN) {
|
|
|
|
fft_in_l = av_calloc(n_fft, sizeof(*fft_in_l));
|
|
|
|
fft_in_r = av_calloc(n_fft, sizeof(*fft_in_r));
|
|
|
|
if (!fft_in_l || !fft_in_r) {
|
2017-06-15 09:19:12 +00:00
|
|
|
ret = AVERROR(ENOMEM);
|
|
|
|
goto fail;
|
2017-06-07 19:23:14 +00:00
|
|
|
}
|
|
|
|
|
|
|
|
av_fft_end(s->fft[0]);
|
|
|
|
av_fft_end(s->fft[1]);
|
|
|
|
s->fft[0] = av_fft_init(log2(s->n_fft), 0);
|
|
|
|
s->fft[1] = av_fft_init(log2(s->n_fft), 0);
|
|
|
|
av_fft_end(s->ifft[0]);
|
|
|
|
av_fft_end(s->ifft[1]);
|
|
|
|
s->ifft[0] = av_fft_init(log2(s->n_fft), 1);
|
|
|
|
s->ifft[1] = av_fft_init(log2(s->n_fft), 1);
|
|
|
|
|
|
|
|
if (!s->fft[0] || !s->fft[1] || !s->ifft[0] || !s->ifft[1]) {
|
|
|
|
av_log(ctx, AV_LOG_ERROR, "Unable to create FFT contexts of size %d.\n", s->n_fft);
|
2017-06-15 09:19:12 +00:00
|
|
|
ret = AVERROR(ENOMEM);
|
|
|
|
goto fail;
|
2017-06-07 19:23:14 +00:00
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
s->data_ir[0] = av_calloc(FFALIGN(s->ir_len, 16), sizeof(float) * s->nb_irs);
|
|
|
|
s->data_ir[1] = av_calloc(FFALIGN(s->ir_len, 16), sizeof(float) * s->nb_irs);
|
2018-04-15 10:48:12 +00:00
|
|
|
s->delay[0] = av_calloc(s->nb_irs, sizeof(float));
|
|
|
|
s->delay[1] = av_calloc(s->nb_irs, sizeof(float));
|
2017-06-07 19:23:14 +00:00
|
|
|
|
|
|
|
if (s->type == TIME_DOMAIN) {
|
|
|
|
s->ringbuffer[0] = av_calloc(s->buffer_length, sizeof(float) * nb_input_channels);
|
|
|
|
s->ringbuffer[1] = av_calloc(s->buffer_length, sizeof(float) * nb_input_channels);
|
|
|
|
} else {
|
|
|
|
s->ringbuffer[0] = av_calloc(s->buffer_length, sizeof(float));
|
|
|
|
s->ringbuffer[1] = av_calloc(s->buffer_length, sizeof(float));
|
2018-04-15 10:48:12 +00:00
|
|
|
s->temp_fft[0] = av_calloc(s->n_fft, sizeof(FFTComplex));
|
|
|
|
s->temp_fft[1] = av_calloc(s->n_fft, sizeof(FFTComplex));
|
2017-06-15 09:19:12 +00:00
|
|
|
if (!s->temp_fft[0] || !s->temp_fft[1]) {
|
|
|
|
ret = AVERROR(ENOMEM);
|
|
|
|
goto fail;
|
|
|
|
}
|
2017-06-07 19:23:14 +00:00
|
|
|
}
|
|
|
|
|
|
|
|
if (!s->data_ir[0] || !s->data_ir[1] ||
|
2017-06-15 09:19:12 +00:00
|
|
|
!s->ringbuffer[0] || !s->ringbuffer[1]) {
|
|
|
|
ret = AVERROR(ENOMEM);
|
|
|
|
goto fail;
|
|
|
|
}
|
2017-06-07 19:23:14 +00:00
|
|
|
|
2018-04-15 10:48:12 +00:00
|
|
|
for (i = 0; i < s->nb_inputs - 1; i++) {
|
2017-06-07 19:23:14 +00:00
|
|
|
s->in[i + 1].frame = ff_get_audio_buffer(ctx->inputs[i + 1], s->ir_len);
|
2017-06-15 09:19:12 +00:00
|
|
|
if (!s->in[i + 1].frame) {
|
|
|
|
ret = AVERROR(ENOMEM);
|
|
|
|
goto fail;
|
|
|
|
}
|
2017-06-07 19:23:14 +00:00
|
|
|
}
|
|
|
|
|
|
|
|
if (s->type == TIME_DOMAIN) {
|
|
|
|
s->temp_src[0] = av_calloc(FFALIGN(ir_len, 16), sizeof(float));
|
|
|
|
s->temp_src[1] = av_calloc(FFALIGN(ir_len, 16), sizeof(float));
|
|
|
|
|
|
|
|
data_ir_l = av_calloc(nb_irs * FFALIGN(ir_len, 16), sizeof(*data_ir_l));
|
|
|
|
data_ir_r = av_calloc(nb_irs * FFALIGN(ir_len, 16), sizeof(*data_ir_r));
|
|
|
|
if (!data_ir_r || !data_ir_l || !s->temp_src[0] || !s->temp_src[1]) {
|
2017-06-15 09:19:12 +00:00
|
|
|
ret = AVERROR(ENOMEM);
|
|
|
|
goto fail;
|
2017-06-07 19:23:14 +00:00
|
|
|
}
|
|
|
|
} else {
|
2018-04-15 10:48:12 +00:00
|
|
|
data_hrtf_l = av_calloc(n_fft, sizeof(*data_hrtf_l) * nb_irs);
|
|
|
|
data_hrtf_r = av_calloc(n_fft, sizeof(*data_hrtf_r) * nb_irs);
|
2017-06-07 19:23:14 +00:00
|
|
|
if (!data_hrtf_r || !data_hrtf_l) {
|
2017-06-15 09:19:12 +00:00
|
|
|
ret = AVERROR(ENOMEM);
|
|
|
|
goto fail;
|
2017-06-07 19:23:14 +00:00
|
|
|
}
|
|
|
|
}
|
|
|
|
|
2018-04-15 10:48:12 +00:00
|
|
|
for (i = 0; i < s->nb_inputs - 1; i++) {
|
2017-06-07 19:23:14 +00:00
|
|
|
int len = s->in[i + 1].ir_len;
|
|
|
|
int delay_l = s->in[i + 1].delay_l;
|
|
|
|
int delay_r = s->in[i + 1].delay_r;
|
|
|
|
float *ptr;
|
|
|
|
|
|
|
|
av_audio_fifo_read(s->in[i + 1].fifo, (void **)s->in[i + 1].frame->extended_data, len);
|
|
|
|
ptr = (float *)s->in[i + 1].frame->extended_data[0];
|
|
|
|
|
2018-04-15 10:48:12 +00:00
|
|
|
if (s->hrir_fmt == HRIR_STEREO) {
|
|
|
|
int idx = -1;
|
|
|
|
|
|
|
|
for (j = 0; j < inlink->channels; j++) {
|
|
|
|
if (s->mapping[i] < 0) {
|
|
|
|
continue;
|
|
|
|
}
|
2017-06-07 19:23:14 +00:00
|
|
|
|
2018-04-15 10:48:12 +00:00
|
|
|
if ((av_channel_layout_extract_channel(inlink->channel_layout, j)) == (1LL << s->mapping[i])) {
|
|
|
|
idx = i;
|
|
|
|
break;
|
|
|
|
}
|
2017-06-07 19:23:14 +00:00
|
|
|
}
|
|
|
|
|
2018-04-15 10:48:12 +00:00
|
|
|
if (idx == -1)
|
|
|
|
continue;
|
|
|
|
if (s->type == TIME_DOMAIN) {
|
|
|
|
offset = idx * FFALIGN(len, 16);
|
|
|
|
for (j = 0; j < len; j++) {
|
|
|
|
data_ir_l[offset + j] = ptr[len * 2 - j * 2 - 2] * gain_lin;
|
|
|
|
data_ir_r[offset + j] = ptr[len * 2 - j * 2 - 1] * gain_lin;
|
|
|
|
}
|
|
|
|
} else {
|
|
|
|
memset(fft_in_l, 0, n_fft * sizeof(*fft_in_l));
|
|
|
|
memset(fft_in_r, 0, n_fft * sizeof(*fft_in_r));
|
|
|
|
|
|
|
|
offset = idx * n_fft;
|
|
|
|
for (j = 0; j < len; j++) {
|
|
|
|
fft_in_l[delay_l + j].re = ptr[j * 2 ] * gain_lin;
|
|
|
|
fft_in_r[delay_r + j].re = ptr[j * 2 + 1] * gain_lin;
|
|
|
|
}
|
|
|
|
|
|
|
|
av_fft_permute(s->fft[0], fft_in_l);
|
|
|
|
av_fft_calc(s->fft[0], fft_in_l);
|
|
|
|
memcpy(data_hrtf_l + offset, fft_in_l, n_fft * sizeof(*fft_in_l));
|
|
|
|
av_fft_permute(s->fft[0], fft_in_r);
|
|
|
|
av_fft_calc(s->fft[0], fft_in_r);
|
|
|
|
memcpy(data_hrtf_r + offset, fft_in_r, n_fft * sizeof(*fft_in_r));
|
|
|
|
}
|
|
|
|
} else {
|
|
|
|
int I, N = ctx->inputs[1]->channels;
|
|
|
|
|
|
|
|
for (k = 0; k < N / 2; k++) {
|
|
|
|
int idx = -1;
|
|
|
|
|
|
|
|
for (j = 0; j < inlink->channels; j++) {
|
|
|
|
if (s->mapping[k] < 0) {
|
|
|
|
continue;
|
|
|
|
}
|
|
|
|
|
|
|
|
if ((av_channel_layout_extract_channel(inlink->channel_layout, j)) == (1LL << s->mapping[k])) {
|
|
|
|
idx = k;
|
|
|
|
break;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
if (idx == -1)
|
|
|
|
continue;
|
|
|
|
|
|
|
|
I = idx * 2;
|
|
|
|
if (s->type == TIME_DOMAIN) {
|
|
|
|
offset = idx * FFALIGN(len, 16);
|
|
|
|
for (j = 0; j < len; j++) {
|
2018-04-16 07:31:11 +00:00
|
|
|
data_ir_l[offset + j] = ptr[len * N - j * N - N + I ] * gain_lin;
|
|
|
|
data_ir_r[offset + j] = ptr[len * N - j * N - N + I + 1] * gain_lin;
|
2018-04-15 10:48:12 +00:00
|
|
|
}
|
|
|
|
} else {
|
|
|
|
memset(fft_in_l, 0, n_fft * sizeof(*fft_in_l));
|
|
|
|
memset(fft_in_r, 0, n_fft * sizeof(*fft_in_r));
|
|
|
|
|
|
|
|
offset = idx * n_fft;
|
|
|
|
for (j = 0; j < len; j++) {
|
|
|
|
fft_in_l[delay_l + j].re = ptr[j * N + I ] * gain_lin;
|
|
|
|
fft_in_r[delay_r + j].re = ptr[j * N + I + 1] * gain_lin;
|
|
|
|
}
|
|
|
|
|
|
|
|
av_fft_permute(s->fft[0], fft_in_l);
|
|
|
|
av_fft_calc(s->fft[0], fft_in_l);
|
|
|
|
memcpy(data_hrtf_l + offset, fft_in_l, n_fft * sizeof(*fft_in_l));
|
|
|
|
av_fft_permute(s->fft[0], fft_in_r);
|
|
|
|
av_fft_calc(s->fft[0], fft_in_r);
|
|
|
|
memcpy(data_hrtf_r + offset, fft_in_r, n_fft * sizeof(*fft_in_r));
|
|
|
|
}
|
|
|
|
}
|
2017-06-07 19:23:14 +00:00
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
if (s->type == TIME_DOMAIN) {
|
|
|
|
memcpy(s->data_ir[0], data_ir_l, sizeof(float) * nb_irs * FFALIGN(ir_len, 16));
|
|
|
|
memcpy(s->data_ir[1], data_ir_r, sizeof(float) * nb_irs * FFALIGN(ir_len, 16));
|
|
|
|
} else {
|
2018-04-15 10:48:12 +00:00
|
|
|
s->data_hrtf[0] = av_calloc(n_fft * s->nb_irs, sizeof(FFTComplex));
|
|
|
|
s->data_hrtf[1] = av_calloc(n_fft * s->nb_irs, sizeof(FFTComplex));
|
2017-06-07 19:23:14 +00:00
|
|
|
if (!s->data_hrtf[0] || !s->data_hrtf[1]) {
|
2017-06-15 09:19:12 +00:00
|
|
|
ret = AVERROR(ENOMEM);
|
|
|
|
goto fail;
|
2017-06-07 19:23:14 +00:00
|
|
|
}
|
|
|
|
|
|
|
|
memcpy(s->data_hrtf[0], data_hrtf_l,
|
|
|
|
sizeof(FFTComplex) * nb_irs * n_fft);
|
|
|
|
memcpy(s->data_hrtf[1], data_hrtf_r,
|
|
|
|
sizeof(FFTComplex) * nb_irs * n_fft);
|
|
|
|
}
|
|
|
|
|
|
|
|
s->have_hrirs = 1;
|
|
|
|
|
2017-06-15 09:19:12 +00:00
|
|
|
fail:
|
|
|
|
|
|
|
|
av_freep(&data_ir_l);
|
|
|
|
av_freep(&data_ir_r);
|
|
|
|
|
|
|
|
av_freep(&data_hrtf_l);
|
|
|
|
av_freep(&data_hrtf_r);
|
|
|
|
|
|
|
|
av_freep(&fft_in_l);
|
|
|
|
av_freep(&fft_in_r);
|
|
|
|
|
|
|
|
return ret;
|
2017-06-07 19:23:14 +00:00
|
|
|
}
|
|
|
|
|
2018-04-16 14:08:55 +00:00
|
|
|
static int activate(AVFilterContext *ctx)
|
2017-06-07 19:23:14 +00:00
|
|
|
{
|
|
|
|
HeadphoneContext *s = ctx->priv;
|
2018-04-16 14:08:55 +00:00
|
|
|
AVFilterLink *inlink = ctx->inputs[0];
|
2017-06-07 19:23:14 +00:00
|
|
|
AVFilterLink *outlink = ctx->outputs[0];
|
2018-04-16 14:08:55 +00:00
|
|
|
AVFrame *in = NULL;
|
|
|
|
int i, ret;
|
2017-06-07 19:23:14 +00:00
|
|
|
|
2018-04-16 14:08:55 +00:00
|
|
|
FF_FILTER_FORWARD_STATUS_BACK_ALL(ctx->outputs[0], ctx);
|
|
|
|
if (!s->eof_hrirs) {
|
|
|
|
for (i = 1; i < s->nb_inputs; i++) {
|
|
|
|
AVFrame *ir = NULL;
|
|
|
|
int64_t pts;
|
|
|
|
int status;
|
2017-06-07 19:23:14 +00:00
|
|
|
|
2018-04-16 14:08:55 +00:00
|
|
|
if (s->in[i].eof)
|
|
|
|
continue;
|
2017-06-07 19:23:14 +00:00
|
|
|
|
2018-04-16 14:08:55 +00:00
|
|
|
if ((ret = ff_inlink_consume_frame(ctx->inputs[i], &ir)) > 0) {
|
|
|
|
ret = read_ir(ctx->inputs[i], i, ir);
|
|
|
|
if (ret < 0)
|
|
|
|
return ret;
|
|
|
|
}
|
|
|
|
if (ret < 0)
|
|
|
|
return ret;
|
|
|
|
|
|
|
|
if (!s->in[i].eof) {
|
|
|
|
if (ff_inlink_acknowledge_status(ctx->inputs[i], &status, &pts)) {
|
|
|
|
if (status == AVERROR_EOF) {
|
|
|
|
s->in[i].eof = 1;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
for (i = 1; i < s->nb_inputs; i++) {
|
|
|
|
if (!s->in[i].eof)
|
|
|
|
break;
|
|
|
|
}
|
|
|
|
|
|
|
|
if (i != s->nb_inputs) {
|
|
|
|
if (ff_outlink_frame_wanted(ctx->outputs[0])) {
|
|
|
|
for (i = 1; i < s->nb_inputs; i++) {
|
|
|
|
if (!s->in[i].eof)
|
|
|
|
ff_inlink_request_frame(ctx->inputs[i]);
|
|
|
|
}
|
|
|
|
}
|
|
|
|
return 0;
|
|
|
|
} else {
|
|
|
|
s->eof_hrirs = 1;
|
|
|
|
}
|
|
|
|
}
|
2017-11-20 12:37:24 +00:00
|
|
|
|
2017-06-07 19:23:14 +00:00
|
|
|
if (!s->have_hrirs && s->eof_hrirs) {
|
|
|
|
ret = convert_coeffs(ctx, inlink);
|
|
|
|
if (ret < 0)
|
|
|
|
return ret;
|
|
|
|
}
|
|
|
|
|
2018-04-16 14:08:55 +00:00
|
|
|
if ((ret = ff_inlink_consume_samples(ctx->inputs[0], s->size, s->size, &in)) > 0) {
|
|
|
|
ret = headphone_frame(s, in, outlink);
|
|
|
|
if (ret < 0)
|
|
|
|
return ret;
|
2017-06-07 19:23:14 +00:00
|
|
|
}
|
2017-11-20 12:37:24 +00:00
|
|
|
|
2018-04-16 14:08:55 +00:00
|
|
|
if (ret < 0)
|
|
|
|
return ret;
|
|
|
|
|
|
|
|
FF_FILTER_FORWARD_STATUS(ctx->inputs[0], ctx->outputs[0]);
|
|
|
|
if (ff_outlink_frame_wanted(ctx->outputs[0]))
|
|
|
|
ff_inlink_request_frame(ctx->inputs[0]);
|
|
|
|
|
2017-11-20 12:37:24 +00:00
|
|
|
return 0;
|
2017-06-07 19:23:14 +00:00
|
|
|
}
|
|
|
|
|
|
|
|
static int query_formats(AVFilterContext *ctx)
|
|
|
|
{
|
|
|
|
struct HeadphoneContext *s = ctx->priv;
|
|
|
|
AVFilterFormats *formats = NULL;
|
|
|
|
AVFilterChannelLayouts *layouts = NULL;
|
2018-04-15 10:48:12 +00:00
|
|
|
AVFilterChannelLayouts *stereo_layout = NULL;
|
|
|
|
AVFilterChannelLayouts *hrir_layouts = NULL;
|
2017-06-07 19:23:14 +00:00
|
|
|
int ret, i;
|
|
|
|
|
|
|
|
ret = ff_add_format(&formats, AV_SAMPLE_FMT_FLT);
|
|
|
|
if (ret)
|
|
|
|
return ret;
|
|
|
|
ret = ff_set_common_formats(ctx, formats);
|
|
|
|
if (ret)
|
|
|
|
return ret;
|
|
|
|
|
|
|
|
layouts = ff_all_channel_layouts();
|
|
|
|
if (!layouts)
|
|
|
|
return AVERROR(ENOMEM);
|
|
|
|
|
|
|
|
ret = ff_channel_layouts_ref(layouts, &ctx->inputs[0]->out_channel_layouts);
|
|
|
|
if (ret)
|
|
|
|
return ret;
|
|
|
|
|
2018-04-15 10:48:12 +00:00
|
|
|
ret = ff_add_channel_layout(&stereo_layout, AV_CH_LAYOUT_STEREO);
|
2017-06-07 19:23:14 +00:00
|
|
|
if (ret)
|
|
|
|
return ret;
|
|
|
|
|
2018-04-15 10:48:12 +00:00
|
|
|
if (s->hrir_fmt == HRIR_MULTI) {
|
|
|
|
hrir_layouts = ff_all_channel_counts();
|
|
|
|
if (!hrir_layouts)
|
|
|
|
ret = AVERROR(ENOMEM);
|
|
|
|
ret = ff_channel_layouts_ref(hrir_layouts, &ctx->inputs[1]->out_channel_layouts);
|
2017-06-07 19:23:14 +00:00
|
|
|
if (ret)
|
|
|
|
return ret;
|
2018-04-15 10:48:12 +00:00
|
|
|
} else {
|
|
|
|
for (i = 1; i < s->nb_inputs; i++) {
|
|
|
|
ret = ff_channel_layouts_ref(stereo_layout, &ctx->inputs[i]->out_channel_layouts);
|
|
|
|
if (ret)
|
|
|
|
return ret;
|
|
|
|
}
|
2017-06-07 19:23:14 +00:00
|
|
|
}
|
|
|
|
|
2018-04-15 10:48:12 +00:00
|
|
|
ret = ff_channel_layouts_ref(stereo_layout, &ctx->outputs[0]->in_channel_layouts);
|
2017-06-07 19:23:14 +00:00
|
|
|
if (ret)
|
|
|
|
return ret;
|
|
|
|
|
|
|
|
formats = ff_all_samplerates();
|
|
|
|
if (!formats)
|
|
|
|
return AVERROR(ENOMEM);
|
|
|
|
return ff_set_common_samplerates(ctx, formats);
|
|
|
|
}
|
|
|
|
|
|
|
|
static int config_input(AVFilterLink *inlink)
|
|
|
|
{
|
|
|
|
AVFilterContext *ctx = inlink->dst;
|
|
|
|
HeadphoneContext *s = ctx->priv;
|
|
|
|
|
|
|
|
if (s->nb_irs < inlink->channels) {
|
2018-04-15 10:48:12 +00:00
|
|
|
av_log(ctx, AV_LOG_ERROR, "Number of HRIRs must be >= %d.\n", inlink->channels);
|
2017-06-07 19:23:14 +00:00
|
|
|
return AVERROR(EINVAL);
|
|
|
|
}
|
|
|
|
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
|
|
|
static av_cold int init(AVFilterContext *ctx)
|
|
|
|
{
|
|
|
|
HeadphoneContext *s = ctx->priv;
|
2017-08-25 07:45:20 +00:00
|
|
|
int i, ret;
|
2017-06-07 19:23:14 +00:00
|
|
|
|
|
|
|
AVFilterPad pad = {
|
|
|
|
.name = "in0",
|
|
|
|
.type = AVMEDIA_TYPE_AUDIO,
|
|
|
|
.config_props = config_input,
|
|
|
|
};
|
2017-08-25 07:45:20 +00:00
|
|
|
if ((ret = ff_insert_inpad(ctx, 0, &pad)) < 0)
|
|
|
|
return ret;
|
2017-06-07 19:23:14 +00:00
|
|
|
|
|
|
|
if (!s->map) {
|
|
|
|
av_log(ctx, AV_LOG_ERROR, "Valid mapping must be set.\n");
|
|
|
|
return AVERROR(EINVAL);
|
|
|
|
}
|
|
|
|
|
|
|
|
parse_map(ctx);
|
|
|
|
|
|
|
|
s->in = av_calloc(s->nb_inputs, sizeof(*s->in));
|
|
|
|
if (!s->in)
|
|
|
|
return AVERROR(ENOMEM);
|
|
|
|
|
|
|
|
for (i = 1; i < s->nb_inputs; i++) {
|
|
|
|
char *name = av_asprintf("hrir%d", i - 1);
|
|
|
|
AVFilterPad pad = {
|
|
|
|
.name = name,
|
|
|
|
.type = AVMEDIA_TYPE_AUDIO,
|
|
|
|
};
|
|
|
|
if (!name)
|
|
|
|
return AVERROR(ENOMEM);
|
2017-08-25 07:45:20 +00:00
|
|
|
if ((ret = ff_insert_inpad(ctx, i, &pad)) < 0) {
|
|
|
|
av_freep(&pad.name);
|
|
|
|
return ret;
|
|
|
|
}
|
2017-06-07 19:23:14 +00:00
|
|
|
}
|
|
|
|
|
|
|
|
s->fdsp = avpriv_float_dsp_alloc(0);
|
|
|
|
if (!s->fdsp)
|
|
|
|
return AVERROR(ENOMEM);
|
|
|
|
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
|
|
|
static int config_output(AVFilterLink *outlink)
|
|
|
|
{
|
|
|
|
AVFilterContext *ctx = outlink->src;
|
|
|
|
HeadphoneContext *s = ctx->priv;
|
|
|
|
AVFilterLink *inlink = ctx->inputs[0];
|
|
|
|
int i;
|
|
|
|
|
2018-04-15 10:48:12 +00:00
|
|
|
if (s->hrir_fmt == HRIR_MULTI) {
|
|
|
|
AVFilterLink *hrir_link = ctx->inputs[1];
|
|
|
|
|
|
|
|
if (hrir_link->channels < inlink->channels * 2) {
|
|
|
|
av_log(ctx, AV_LOG_ERROR, "Number of channels in HRIR stream must be >= %d.\n", inlink->channels * 2);
|
|
|
|
return AVERROR(EINVAL);
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
2017-06-07 19:23:14 +00:00
|
|
|
for (i = 0; i < s->nb_inputs; i++) {
|
|
|
|
s->in[i].fifo = av_audio_fifo_alloc(ctx->inputs[i]->format, ctx->inputs[i]->channels, 1024);
|
|
|
|
if (!s->in[i].fifo)
|
|
|
|
return AVERROR(ENOMEM);
|
|
|
|
}
|
|
|
|
s->gain_lfe = expf((s->gain - 3 * inlink->channels - 6 + s->lfe_gain) / 20 * M_LN10);
|
|
|
|
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
|
|
|
static av_cold void uninit(AVFilterContext *ctx)
|
|
|
|
{
|
|
|
|
HeadphoneContext *s = ctx->priv;
|
|
|
|
int i;
|
|
|
|
|
|
|
|
av_fft_end(s->ifft[0]);
|
|
|
|
av_fft_end(s->ifft[1]);
|
|
|
|
av_fft_end(s->fft[0]);
|
|
|
|
av_fft_end(s->fft[1]);
|
|
|
|
av_freep(&s->delay[0]);
|
|
|
|
av_freep(&s->delay[1]);
|
|
|
|
av_freep(&s->data_ir[0]);
|
|
|
|
av_freep(&s->data_ir[1]);
|
|
|
|
av_freep(&s->ringbuffer[0]);
|
|
|
|
av_freep(&s->ringbuffer[1]);
|
|
|
|
av_freep(&s->temp_src[0]);
|
|
|
|
av_freep(&s->temp_src[1]);
|
|
|
|
av_freep(&s->temp_fft[0]);
|
|
|
|
av_freep(&s->temp_fft[1]);
|
|
|
|
av_freep(&s->data_hrtf[0]);
|
|
|
|
av_freep(&s->data_hrtf[1]);
|
|
|
|
av_freep(&s->fdsp);
|
|
|
|
|
|
|
|
for (i = 0; i < s->nb_inputs; i++) {
|
|
|
|
av_frame_free(&s->in[i].frame);
|
|
|
|
av_audio_fifo_free(s->in[i].fifo);
|
|
|
|
if (ctx->input_pads && i)
|
|
|
|
av_freep(&ctx->input_pads[i].name);
|
|
|
|
}
|
|
|
|
av_freep(&s->in);
|
|
|
|
}
|
|
|
|
|
|
|
|
#define OFFSET(x) offsetof(HeadphoneContext, x)
|
|
|
|
#define FLAGS AV_OPT_FLAG_AUDIO_PARAM|AV_OPT_FLAG_FILTERING_PARAM
|
|
|
|
|
|
|
|
static const AVOption headphone_options[] = {
|
|
|
|
{ "map", "set channels convolution mappings", OFFSET(map), AV_OPT_TYPE_STRING, {.str=NULL}, .flags = FLAGS },
|
|
|
|
{ "gain", "set gain in dB", OFFSET(gain), AV_OPT_TYPE_FLOAT, {.dbl=0}, -20, 40, .flags = FLAGS },
|
|
|
|
{ "lfe", "set lfe gain in dB", OFFSET(lfe_gain), AV_OPT_TYPE_FLOAT, {.dbl=0}, -20, 40, .flags = FLAGS },
|
|
|
|
{ "type", "set processing", OFFSET(type), AV_OPT_TYPE_INT, {.i64=1}, 0, 1, .flags = FLAGS, "type" },
|
|
|
|
{ "time", "time domain", 0, AV_OPT_TYPE_CONST, {.i64=0}, 0, 0, .flags = FLAGS, "type" },
|
|
|
|
{ "freq", "frequency domain", 0, AV_OPT_TYPE_CONST, {.i64=1}, 0, 0, .flags = FLAGS, "type" },
|
2018-04-14 15:25:06 +00:00
|
|
|
{ "size", "set frame size", OFFSET(size), AV_OPT_TYPE_INT, {.i64=1024},1024,96000, .flags = FLAGS },
|
2018-04-15 10:48:12 +00:00
|
|
|
{ "hrir", "set hrir format", OFFSET(hrir_fmt), AV_OPT_TYPE_INT, {.i64=HRIR_STEREO}, 0, 1, .flags = FLAGS, "hrir" },
|
|
|
|
{ "stereo", "hrir files have exactly 2 channels", 0, AV_OPT_TYPE_CONST, {.i64=HRIR_STEREO}, 0, 0, .flags = FLAGS, "hrir" },
|
|
|
|
{ "multich", "single multichannel hrir file", 0, AV_OPT_TYPE_CONST, {.i64=HRIR_MULTI}, 0, 0, .flags = FLAGS, "hrir" },
|
2017-06-07 19:23:14 +00:00
|
|
|
{ NULL }
|
|
|
|
};
|
|
|
|
|
|
|
|
AVFILTER_DEFINE_CLASS(headphone);
|
|
|
|
|
|
|
|
static const AVFilterPad outputs[] = {
|
|
|
|
{
|
|
|
|
.name = "default",
|
|
|
|
.type = AVMEDIA_TYPE_AUDIO,
|
|
|
|
.config_props = config_output,
|
|
|
|
},
|
|
|
|
{ NULL }
|
|
|
|
};
|
|
|
|
|
|
|
|
AVFilter ff_af_headphone = {
|
|
|
|
.name = "headphone",
|
|
|
|
.description = NULL_IF_CONFIG_SMALL("Apply headphone binaural spatialization with HRTFs in additional streams."),
|
|
|
|
.priv_size = sizeof(HeadphoneContext),
|
|
|
|
.priv_class = &headphone_class,
|
|
|
|
.init = init,
|
|
|
|
.uninit = uninit,
|
|
|
|
.query_formats = query_formats,
|
2018-04-16 14:08:55 +00:00
|
|
|
.activate = activate,
|
2017-06-07 19:23:14 +00:00
|
|
|
.inputs = NULL,
|
|
|
|
.outputs = outputs,
|
|
|
|
.flags = AVFILTER_FLAG_SLICE_THREADS | AVFILTER_FLAG_DYNAMIC_INPUTS,
|
|
|
|
};
|