avfilter/af_dialoguenhance: add double-floating point sample format support
This commit is contained in:
Paul B Mahol
parent
704ef556fe
commit
9e74c7ae87
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@ -26,7 +26,6 @@
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#include "filters.h"
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#include "formats.h"
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#include "internal.h"
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#include "window_func.h"
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#include <float.h>
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@ -38,8 +37,11 @@ typedef struct AudioDialogueEnhancementContext {
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int fft_size;
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int overlap;
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float *window;
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float prev_vad;
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void *window;
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float *window_float;
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double *window_double;
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float prev_vad_float;
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double prev_vad_double;
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AVFrame *in;
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AVFrame *in_frame;
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@ -49,6 +51,8 @@ typedef struct AudioDialogueEnhancementContext {
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AVFrame *windowed_prev;
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AVFrame *center_frame;
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int (*de_stereo)(AVFilterContext *ctx, AVFrame *out);
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AVTXContext *tx_ctx[2], *itx_ctx;
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av_tx_fn tx_fn, itx_fn;
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} AudioDialogueEnhanceContext;
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@ -72,6 +76,7 @@ static int query_formats(AVFilterContext *ctx)
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int ret;
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if ((ret = ff_add_format (&formats, AV_SAMPLE_FMT_FLTP )) < 0 ||
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(ret = ff_add_format (&formats, AV_SAMPLE_FMT_DBLP )) < 0 ||
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(ret = ff_set_common_formats (ctx , formats )) < 0 ||
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(ret = ff_add_channel_layout (&in_layout , &(AVChannelLayout)AV_CHANNEL_LAYOUT_STEREO)) < 0 ||
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(ret = ff_channel_layouts_ref(in_layout, &ctx->inputs[0]->outcfg.channel_layouts)) < 0 ||
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@ -82,20 +87,22 @@ static int query_formats(AVFilterContext *ctx)
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return ff_set_common_all_samplerates(ctx);
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}
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#define DEPTH 32
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#include "dialoguenhance_template.c"
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#undef DEPTH
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#define DEPTH 64
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#include "dialoguenhance_template.c"
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static int config_input(AVFilterLink *inlink)
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{
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AVFilterContext *ctx = inlink->dst;
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AudioDialogueEnhanceContext *s = ctx->priv;
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float scale = 1.f, iscale, overlap;
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int ret;
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s->fft_size = inlink->sample_rate > 100000 ? 8192 : inlink->sample_rate > 50000 ? 4096 : 2048;
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s->overlap = s->fft_size / 4;
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s->window = av_calloc(s->fft_size, sizeof(*s->window));
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if (!s->window)
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return AVERROR(ENOMEM);
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s->in_frame = ff_get_audio_buffer(inlink, (s->fft_size + 2) * 2);
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s->center_frame = ff_get_audio_buffer(inlink, (s->fft_size + 2) * 2);
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s->out_dist_frame = ff_get_audio_buffer(inlink, (s->fft_size + 2) * 2);
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@ -106,202 +113,18 @@ static int config_input(AVFilterLink *inlink)
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!s->out_dist_frame || !s->windowed_frame || !s->center_frame)
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return AVERROR(ENOMEM);
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generate_window_func(s->window, s->fft_size, WFUNC_SINE, &overlap);
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iscale = 1.f / (s->fft_size * 1.5f);
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ret = av_tx_init(&s->tx_ctx[0], &s->tx_fn, AV_TX_FLOAT_RDFT, 0, s->fft_size, &scale, 0);
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if (ret < 0)
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return ret;
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ret = av_tx_init(&s->tx_ctx[1], &s->tx_fn, AV_TX_FLOAT_RDFT, 0, s->fft_size, &scale, 0);
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if (ret < 0)
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return ret;
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ret = av_tx_init(&s->itx_ctx, &s->itx_fn, AV_TX_FLOAT_RDFT, 1, s->fft_size, &iscale, 0);
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if (ret < 0)
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return ret;
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return 0;
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}
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static void apply_window(AudioDialogueEnhanceContext *s,
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const float *in_frame, float *out_frame, const int add_to_out_frame)
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{
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const float *window = s->window;
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if (add_to_out_frame) {
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for (int i = 0; i < s->fft_size; i++)
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out_frame[i] += in_frame[i] * window[i];
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} else {
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for (int i = 0; i < s->fft_size; i++)
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out_frame[i] = in_frame[i] * window[i];
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}
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}
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static float sqrf(float x)
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{
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return x * x;
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}
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static void get_centere(AVComplexFloat *left, AVComplexFloat *right,
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AVComplexFloat *center, int N)
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{
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for (int i = 0; i < N; i++) {
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const float l_re = left[i].re;
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const float l_im = left[i].im;
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const float r_re = right[i].re;
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const float r_im = right[i].im;
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const float a = 0.5f * (1.f - sqrtf((sqrf(l_re - r_re) + sqrf(l_im - r_im))/
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(sqrf(l_re + r_re) + sqrf(l_im + r_im) + FLT_EPSILON)));
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center[i].re = a * (l_re + r_re);
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center[i].im = a * (l_im + r_im);
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}
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}
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static float flux(float *curf, float *prevf, int N)
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{
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AVComplexFloat *cur = (AVComplexFloat *)curf;
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AVComplexFloat *prev = (AVComplexFloat *)prevf;
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float sum = 0.f;
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for (int i = 0; i < N; i++) {
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float c_re = cur[i].re;
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float c_im = cur[i].im;
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float p_re = prev[i].re;
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float p_im = prev[i].im;
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sum += sqrf(hypotf(c_re, c_im) - hypotf(p_re, p_im));
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switch (inlink->format) {
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case AV_SAMPLE_FMT_FLTP:
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s->de_stereo = de_stereo_float;
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ret = de_tx_init_float(ctx);
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break;
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case AV_SAMPLE_FMT_DBLP:
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s->de_stereo = de_stereo_double;
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ret = de_tx_init_double(ctx);
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break;
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}
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return sum;
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}
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static float fluxlr(float *lf, float *lpf,
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float *rf, float *rpf,
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int N)
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{
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AVComplexFloat *l = (AVComplexFloat *)lf;
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AVComplexFloat *lp = (AVComplexFloat *)lpf;
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AVComplexFloat *r = (AVComplexFloat *)rf;
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AVComplexFloat *rp = (AVComplexFloat *)rpf;
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float sum = 0.f;
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for (int i = 0; i < N; i++) {
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float c_re = l[i].re - r[i].re;
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float c_im = l[i].im - r[i].im;
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float p_re = lp[i].re - rp[i].re;
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float p_im = lp[i].im - rp[i].im;
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sum += sqrf(hypotf(c_re, c_im) - hypotf(p_re, p_im));
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}
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return sum;
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}
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static float calc_vad(float fc, float flr, float a)
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{
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const float vad = a * (fc / (fc + flr) - 0.5f);
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return av_clipf(vad, 0.f, 1.f);
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}
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static void get_final(float *c, float *l,
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float *r, float vad, int N,
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float original, float enhance)
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{
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AVComplexFloat *center = (AVComplexFloat *)c;
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AVComplexFloat *left = (AVComplexFloat *)l;
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AVComplexFloat *right = (AVComplexFloat *)r;
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for (int i = 0; i < N; i++) {
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float cP = sqrf(center[i].re) + sqrf(center[i].im);
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float lrP = sqrf(left[i].re - right[i].re) + sqrf(left[i].im - right[i].im);
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float G = cP / (cP + lrP + FLT_EPSILON);
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float re, im;
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re = center[i].re * (original + vad * G * enhance);
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im = center[i].im * (original + vad * G * enhance);
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center[i].re = re;
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center[i].im = im;
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}
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}
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static int de_stereo(AVFilterContext *ctx, AVFrame *out)
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{
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AudioDialogueEnhanceContext *s = ctx->priv;
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float *center = (float *)s->center_frame->extended_data[0];
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float *center_prev = (float *)s->center_frame->extended_data[1];
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float *left_in = (float *)s->in_frame->extended_data[0];
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float *right_in = (float *)s->in_frame->extended_data[1];
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float *left_out = (float *)s->out_dist_frame->extended_data[0];
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float *right_out = (float *)s->out_dist_frame->extended_data[1];
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float *left_samples = (float *)s->in->extended_data[0];
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float *right_samples = (float *)s->in->extended_data[1];
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float *windowed_left = (float *)s->windowed_frame->extended_data[0];
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float *windowed_right = (float *)s->windowed_frame->extended_data[1];
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float *windowed_oleft = (float *)s->windowed_out->extended_data[0];
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float *windowed_oright = (float *)s->windowed_out->extended_data[1];
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float *windowed_pleft = (float *)s->windowed_prev->extended_data[0];
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float *windowed_pright = (float *)s->windowed_prev->extended_data[1];
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float *left_osamples = (float *)out->extended_data[0];
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float *right_osamples = (float *)out->extended_data[1];
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float *center_osamples = (float *)out->extended_data[2];
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const int overlap = s->overlap;
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const int offset = s->fft_size - overlap;
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const int nb_samples = FFMIN(overlap, s->in->nb_samples);
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float vad;
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// shift in/out buffers
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memmove(left_in, &left_in[overlap], offset * sizeof(float));
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memmove(right_in, &right_in[overlap], offset * sizeof(float));
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memmove(left_out, &left_out[overlap], offset * sizeof(float));
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memmove(right_out, &right_out[overlap], offset * sizeof(float));
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memcpy(&left_in[offset], left_samples, nb_samples * sizeof(float));
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memcpy(&right_in[offset], right_samples, nb_samples * sizeof(float));
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memset(&left_out[offset], 0, overlap * sizeof(float));
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memset(&right_out[offset], 0, overlap * sizeof(float));
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apply_window(s, left_in, windowed_left, 0);
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apply_window(s, right_in, windowed_right, 0);
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s->tx_fn(s->tx_ctx[0], windowed_oleft, windowed_left, sizeof(float));
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s->tx_fn(s->tx_ctx[1], windowed_oright, windowed_right, sizeof(float));
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get_centere((AVComplexFloat *)windowed_oleft,
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(AVComplexFloat *)windowed_oright,
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(AVComplexFloat *)center,
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s->fft_size / 2 + 1);
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vad = calc_vad(flux(center, center_prev, s->fft_size / 2 + 1),
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fluxlr(windowed_oleft, windowed_pleft,
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windowed_oright, windowed_pright, s->fft_size / 2 + 1), s->voice);
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vad = vad * 0.1 + 0.9 * s->prev_vad;
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s->prev_vad = vad;
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memcpy(center_prev, center, s->fft_size * sizeof(float));
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memcpy(windowed_pleft, windowed_oleft, s->fft_size * sizeof(float));
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memcpy(windowed_pright, windowed_oright, s->fft_size * sizeof(float));
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get_final(center, windowed_oleft, windowed_oright, vad, s->fft_size / 2 + 1,
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s->original, s->enhance);
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s->itx_fn(s->itx_ctx, windowed_oleft, center, sizeof(AVComplexFloat));
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apply_window(s, windowed_oleft, left_out, 1);
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memcpy(left_osamples, left_in, overlap * sizeof(float));
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memcpy(right_osamples, right_in, overlap * sizeof(float));
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if (ctx->is_disabled)
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memset(center_osamples, 0, overlap * sizeof(float));
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else
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memcpy(center_osamples, left_out, overlap * sizeof(float));
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return 0;
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return ret;
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}
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static int filter_frame(AVFilterLink *inlink, AVFrame *in)
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@ -319,7 +142,7 @@ static int filter_frame(AVFilterLink *inlink, AVFrame *in)
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}
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s->in = in;
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de_stereo(ctx, out);
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s->de_stereo(ctx, out);
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av_frame_copy_props(out, in);
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out->nb_samples = in->nb_samples;
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@ -0,0 +1,274 @@
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/*
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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 "libavutil/tx.h"
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#include "avfilter.h"
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#include "internal.h"
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#include "audio.h"
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#undef ctype
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#undef ftype
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#undef SQRT
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#undef HYPOT
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#undef SAMPLE_FORMAT
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#undef TX_TYPE
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#undef ONE
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#undef ZERO
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#undef HALF
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#undef SIN
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#undef CLIP
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#undef EPSILON
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#if DEPTH == 32
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#define SAMPLE_FORMAT float
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#define SQRT sqrtf
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#define HYPOT hypotf
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#define ctype AVComplexFloat
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#define ftype float
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#define TX_TYPE AV_TX_FLOAT_RDFT
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#define ONE 1.f
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#define ZERO 0.f
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#define HALF 0.5f
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#define SIN sinf
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#define CLIP av_clipf
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#define EPSILON FLT_EPSILON
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#else
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#define SAMPLE_FORMAT double
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#define SQRT sqrt
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#define HYPOT hypot
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#define ctype AVComplexDouble
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#define ftype double
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#define TX_TYPE AV_TX_DOUBLE_RDFT
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#define ONE 1.0
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#define ZERO 0.0
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#define HALF 0.5
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#define SIN sin
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#define CLIP av_clipd
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#define EPSILON DBL_EPSILON
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#endif
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#define fn3(a,b) a##_##b
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#define fn2(a,b) fn3(a,b)
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#define fn(a) fn2(a, SAMPLE_FORMAT)
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static int fn(de_tx_init)(AVFilterContext *ctx)
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{
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AudioDialogueEnhanceContext *s = ctx->priv;
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ftype scale = ONE, iscale = ONE / (s->fft_size * 1.5f);
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int ret;
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s->window = av_calloc(s->fft_size, sizeof(ftype));
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if (!s->window)
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return AVERROR(ENOMEM);
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fn(s->window) = s->window;
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for (int n = 0; n < s->fft_size; n++)
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fn(s->window)[n] = SIN(M_PI*n/(s->fft_size-1));
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ret = av_tx_init(&s->tx_ctx[0], &s->tx_fn, TX_TYPE, 0, s->fft_size, &scale, 0);
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if (ret < 0)
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return ret;
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ret = av_tx_init(&s->tx_ctx[1], &s->tx_fn, TX_TYPE, 0, s->fft_size, &scale, 0);
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if (ret < 0)
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return ret;
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ret = av_tx_init(&s->itx_ctx, &s->itx_fn, TX_TYPE, 1, s->fft_size, &iscale, 0);
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if (ret < 0)
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return ret;
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return 0;
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}
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static void fn(apply_window)(AudioDialogueEnhanceContext *s,
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const ftype *in_frame, ftype *out_frame, const int add_to_out_frame)
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{
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const ftype *window = fn(s->window);
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const int fft_size = s->fft_size;
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if (add_to_out_frame) {
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for (int i = 0; i < fft_size; i++)
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out_frame[i] += in_frame[i] * window[i];
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} else {
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for (int i = 0; i < fft_size; i++)
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out_frame[i] = in_frame[i] * window[i];
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}
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}
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static ftype fn(sqr)(ftype x)
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{
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return x * x;
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}
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static void fn(get_centere)(ctype *left, ctype *right,
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ctype *center, int N)
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{
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for (int i = 0; i < N; i++) {
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const ftype l_re = left[i].re;
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const ftype l_im = left[i].im;
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const ftype r_re = right[i].re;
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const ftype r_im = right[i].im;
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const ftype a = HALF * (ONE - SQRT((fn(sqr)(l_re - r_re) + fn(sqr)(l_im - r_im))/
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(fn(sqr)(l_re + r_re) + fn(sqr)(l_im + r_im) + EPSILON)));
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center[i].re = a * (l_re + r_re);
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center[i].im = a * (l_im + r_im);
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}
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}
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static ftype fn(flux)(ftype *curf, ftype *prevf, int N)
|
||||
{
|
||||
ctype *cur = (ctype *)curf;
|
||||
ctype *prev = (ctype *)prevf;
|
||||
ftype sum = ZERO;
|
||||
|
||||
for (int i = 0; i < N; i++) {
|
||||
ftype c_re = cur[i].re;
|
||||
ftype c_im = cur[i].im;
|
||||
ftype p_re = prev[i].re;
|
||||
ftype p_im = prev[i].im;
|
||||
|
||||
sum += fn(sqr)(HYPOT(c_re, c_im) - HYPOT(p_re, p_im));
|
||||
}
|
||||
|
||||
return sum;
|
||||
}
|
||||
|
||||
static ftype fn(fluxlr)(ftype *lf, ftype *lpf,
|
||||
ftype *rf, ftype *rpf,
|
||||
int N)
|
||||
{
|
||||
ctype *l = (ctype *)lf;
|
||||
ctype *lp = (ctype *)lpf;
|
||||
ctype *r = (ctype *)rf;
|
||||
ctype *rp = (ctype *)rpf;
|
||||
ftype sum = ZERO;
|
||||
|
||||
for (int i = 0; i < N; i++) {
|
||||
ftype c_re = l[i].re - r[i].re;
|
||||
ftype c_im = l[i].im - r[i].im;
|
||||
ftype p_re = lp[i].re - rp[i].re;
|
||||
ftype p_im = lp[i].im - rp[i].im;
|
||||
|
||||
sum += fn(sqr)(HYPOT(c_re, c_im) - HYPOT(p_re, p_im));
|
||||
}
|
||||
|
||||
return sum;
|
||||
}
|
||||
|
||||
static ftype fn(calc_vad)(ftype fc, ftype flr, ftype a)
|
||||
{
|
||||
const ftype vad = a * (fc / (fc + flr) - HALF);
|
||||
|
||||
return CLIP(vad, ZERO, ONE);
|
||||
}
|
||||
|
||||
static void fn(get_final)(ftype *c, ftype *l,
|
||||
ftype *r, ftype vad, int N,
|
||||
ftype original, ftype enhance)
|
||||
{
|
||||
ctype *center = (ctype *)c;
|
||||
ctype *left = (ctype *)l;
|
||||
ctype *right = (ctype *)r;
|
||||
|
||||
for (int i = 0; i < N; i++) {
|
||||
ftype cP = fn(sqr)(center[i].re) + fn(sqr)(center[i].im);
|
||||
ftype lrP = fn(sqr)(left[i].re - right[i].re) + fn(sqr)(left[i].im - right[i].im);
|
||||
ftype G = cP / (cP + lrP + EPSILON);
|
||||
ftype re, im;
|
||||
|
||||
re = center[i].re * (original + vad * G * enhance);
|
||||
im = center[i].im * (original + vad * G * enhance);
|
||||
|
||||
center[i].re = re;
|
||||
center[i].im = im;
|
||||
}
|
||||
}
|
||||
|
||||
static int fn(de_stereo)(AVFilterContext *ctx, AVFrame *out)
|
||||
{
|
||||
AudioDialogueEnhanceContext *s = ctx->priv;
|
||||
ftype *center = (ftype *)s->center_frame->extended_data[0];
|
||||
ftype *center_prev = (ftype *)s->center_frame->extended_data[1];
|
||||
ftype *left_in = (ftype *)s->in_frame->extended_data[0];
|
||||
ftype *right_in = (ftype *)s->in_frame->extended_data[1];
|
||||
ftype *left_out = (ftype *)s->out_dist_frame->extended_data[0];
|
||||
ftype *right_out = (ftype *)s->out_dist_frame->extended_data[1];
|
||||
ftype *left_samples = (ftype *)s->in->extended_data[0];
|
||||
ftype *right_samples = (ftype *)s->in->extended_data[1];
|
||||
ftype *windowed_left = (ftype *)s->windowed_frame->extended_data[0];
|
||||
ftype *windowed_right = (ftype *)s->windowed_frame->extended_data[1];
|
||||
ftype *windowed_oleft = (ftype *)s->windowed_out->extended_data[0];
|
||||
ftype *windowed_oright = (ftype *)s->windowed_out->extended_data[1];
|
||||
ftype *windowed_pleft = (ftype *)s->windowed_prev->extended_data[0];
|
||||
ftype *windowed_pright = (ftype *)s->windowed_prev->extended_data[1];
|
||||
ftype *left_osamples = (ftype *)out->extended_data[0];
|
||||
ftype *right_osamples = (ftype *)out->extended_data[1];
|
||||
ftype *center_osamples = (ftype *)out->extended_data[2];
|
||||
const int overlap = s->overlap;
|
||||
const int offset = s->fft_size - overlap;
|
||||
const int nb_samples = FFMIN(overlap, s->in->nb_samples);
|
||||
ftype vad;
|
||||
|
||||
// shift in/out buffers
|
||||
memmove(left_in, &left_in[overlap], offset * sizeof(ftype));
|
||||
memmove(right_in, &right_in[overlap], offset * sizeof(ftype));
|
||||
memmove(left_out, &left_out[overlap], offset * sizeof(ftype));
|
||||
memmove(right_out, &right_out[overlap], offset * sizeof(ftype));
|
||||
|
||||
memcpy(&left_in[offset], left_samples, nb_samples * sizeof(ftype));
|
||||
memcpy(&right_in[offset], right_samples, nb_samples * sizeof(ftype));
|
||||
memset(&left_out[offset], 0, overlap * sizeof(ftype));
|
||||
memset(&right_out[offset], 0, overlap * sizeof(ftype));
|
||||
|
||||
fn(apply_window)(s, left_in, windowed_left, 0);
|
||||
fn(apply_window)(s, right_in, windowed_right, 0);
|
||||
|
||||
s->tx_fn(s->tx_ctx[0], windowed_oleft, windowed_left, sizeof(ftype));
|
||||
s->tx_fn(s->tx_ctx[1], windowed_oright, windowed_right, sizeof(ftype));
|
||||
|
||||
fn(get_centere)((ctype *)windowed_oleft,
|
||||
(ctype *)windowed_oright,
|
||||
(ctype *)center,
|
||||
s->fft_size / 2 + 1);
|
||||
|
||||
vad = fn(calc_vad)(fn(flux)(center, center_prev, s->fft_size / 2 + 1),
|
||||
fn(fluxlr)(windowed_oleft, windowed_pleft,
|
||||
windowed_oright, windowed_pright, s->fft_size / 2 + 1), s->voice);
|
||||
vad = vad * 0.1 + 0.9 * fn(s->prev_vad);
|
||||
fn(s->prev_vad) = vad;
|
||||
|
||||
memcpy(center_prev, center, s->fft_size * sizeof(ftype));
|
||||
memcpy(windowed_pleft, windowed_oleft, s->fft_size * sizeof(ftype));
|
||||
memcpy(windowed_pright, windowed_oright, s->fft_size * sizeof(ftype));
|
||||
|
||||
fn(get_final)(center, windowed_oleft, windowed_oright, vad, s->fft_size / 2 + 1,
|
||||
s->original, s->enhance);
|
||||
|
||||
s->itx_fn(s->itx_ctx, windowed_oleft, center, sizeof(ctype));
|
||||
|
||||
fn(apply_window)(s, windowed_oleft, left_out, 1);
|
||||
|
||||
memcpy(left_osamples, left_in, overlap * sizeof(ftype));
|
||||
memcpy(right_osamples, right_in, overlap * sizeof(ftype));
|
||||
|
||||
if (ctx->is_disabled)
|
||||
memset(center_osamples, 0, overlap * sizeof(ftype));
|
||||
else
|
||||
memcpy(center_osamples, left_out, overlap * sizeof(ftype));
|
||||
|
||||
return 0;
|
||||
}
|
||||
Loading…
Reference in New Issue