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avfilter/af_afftfilt: switch to activate

tags/n4.2
Paul B Mahol 6 years ago
parent
cc86982fc5
commit
c539dd992c
1 changed files with 126 additions and 102 deletions
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  1. +126
    -102
      libavfilter/af_afftfilt.c

+ 126
- 102
libavfilter/af_afftfilt.c View File

@@ -26,6 +26,7 @@
#include "libavcodec/avfft.h"
#include "libavutil/eval.h"
#include "audio.h"
#include "filters.h"
#include "window_func.h"

typedef struct AFFTFiltContext {
@@ -46,7 +47,7 @@ typedef struct AFFTFiltContext {
int hop_size;
float overlap;
AVFrame *buffer;
int start, end;
int eof;
int win_func;
float win_scale;
float *window_func_lut;
@@ -240,7 +241,7 @@ static int config_input(AVFilterLink *inlink)
return ret;
}

static int filter_frame(AVFilterLink *inlink, AVFrame *frame)
static int filter_frame(AVFilterLink *inlink)
{
AVFilterContext *ctx = inlink->dst;
AVFilterLink *outlink = ctx->outputs[0];
@@ -249,140 +250,163 @@ static int filter_frame(AVFilterLink *inlink, AVFrame *frame)
const float f = 1. / s->win_scale;
double values[VAR_VARS_NB];
AVFrame *out, *in = NULL;
int ch, n, ret, i, j, k;
int start = s->start, end = s->end;
int ch, n, ret, i;

if (s->pts == AV_NOPTS_VALUE)
s->pts = frame->pts;
if (!in) {
in = ff_get_audio_buffer(outlink, window_size);
if (!in)
return AVERROR(ENOMEM);
}

ret = av_audio_fifo_write(s->fifo, (void **)frame->extended_data, frame->nb_samples);
av_frame_free(&frame);
ret = av_audio_fifo_peek(s->fifo, (void **)in->extended_data, window_size);
if (ret < 0)
return ret;
goto fail;

while (av_audio_fifo_size(s->fifo) >= window_size) {
if (!in) {
in = ff_get_audio_buffer(outlink, window_size);
if (!in)
return AVERROR(ENOMEM);
for (ch = 0; ch < inlink->channels; ch++) {
const float *src = (float *)in->extended_data[ch];
FFTComplex *fft_data = s->fft_data[ch];

for (n = 0; n < in->nb_samples; n++) {
fft_data[n].re = src[n] * s->window_func_lut[n];
fft_data[n].im = 0;
}

ret = av_audio_fifo_peek(s->fifo, (void **)in->extended_data, window_size);
if (ret < 0)
break;
for (; n < window_size; n++) {
fft_data[n].re = 0;
fft_data[n].im = 0;
}
}

for (ch = 0; ch < inlink->channels; ch++) {
const float *src = (float *)in->extended_data[ch];
FFTComplex *fft_data = s->fft_data[ch];
values[VAR_PTS] = s->pts;
values[VAR_SAMPLE_RATE] = inlink->sample_rate;
values[VAR_NBBINS] = window_size / 2;
values[VAR_CHANNELS] = inlink->channels;

for (n = 0; n < in->nb_samples; n++) {
fft_data[n].re = src[n] * s->window_func_lut[n];
fft_data[n].im = 0;
}
for (ch = 0; ch < inlink->channels; ch++) {
FFTComplex *fft_data = s->fft_data[ch];

for (; n < window_size; n++) {
fft_data[n].re = 0;
fft_data[n].im = 0;
}
}
av_fft_permute(s->fft, fft_data);
av_fft_calc(s->fft, fft_data);
}

values[VAR_PTS] = s->pts;
values[VAR_SAMPLE_RATE] = inlink->sample_rate;
values[VAR_NBBINS] = window_size / 2;
values[VAR_CHANNELS] = inlink->channels;
for (ch = 0; ch < inlink->channels; ch++) {
FFTComplex *fft_data = s->fft_data[ch];
FFTComplex *fft_temp = s->fft_temp[ch];
float *buf = (float *)s->buffer->extended_data[ch];
int x;
values[VAR_CHANNEL] = ch;

for (ch = 0; ch < inlink->channels; ch++) {
FFTComplex *fft_data = s->fft_data[ch];
for (n = 0; n <= window_size / 2; n++) {
float fr, fi;

av_fft_permute(s->fft, fft_data);
av_fft_calc(s->fft, fft_data);
}
values[VAR_BIN] = n;
values[VAR_REAL] = fft_data[n].re;
values[VAR_IMAG] = fft_data[n].im;

for (ch = 0; ch < inlink->channels; ch++) {
FFTComplex *fft_data = s->fft_data[ch];
FFTComplex *fft_temp = s->fft_temp[ch];
float *buf = (float *)s->buffer->extended_data[ch];
int x;
values[VAR_CHANNEL] = ch;
fr = av_expr_eval(s->real[ch], values, s);
fi = av_expr_eval(s->imag[ch], values, s);

for (n = 0; n <= window_size / 2; n++) {
float fr, fi;
fft_temp[n].re = fr;
fft_temp[n].im = fi;
}

values[VAR_BIN] = n;
values[VAR_REAL] = fft_data[n].re;
values[VAR_IMAG] = fft_data[n].im;
for (n = window_size / 2 + 1, x = window_size / 2 - 1; n < window_size; n++, x--) {
fft_temp[n].re = fft_temp[x].re;
fft_temp[n].im = -fft_temp[x].im;
}

fr = av_expr_eval(s->real[ch], values, s);
fi = av_expr_eval(s->imag[ch], values, s);
av_fft_permute(s->ifft, fft_temp);
av_fft_calc(s->ifft, fft_temp);

fft_temp[n].re = fr;
fft_temp[n].im = fi;
}
for (i = 0; i < window_size; i++) {
buf[i] += s->fft_temp[ch][i].re * f;
}
}

for (n = window_size / 2 + 1, x = window_size / 2 - 1; n < window_size; n++, x--) {
fft_temp[n].re = fft_temp[x].re;
fft_temp[n].im = -fft_temp[x].im;
}
out = ff_get_audio_buffer(outlink, s->hop_size);
if (!out) {
ret = AVERROR(ENOMEM);
goto fail;
}

av_fft_permute(s->ifft, fft_temp);
av_fft_calc(s->ifft, fft_temp);
out->pts = s->pts;
s->pts += s->hop_size;

start = s->start;
end = s->end;
k = end;
for (i = 0, j = start; j < k && i < window_size; i++, j++) {
buf[j] += s->fft_temp[ch][i].re * f;
}
for (ch = 0; ch < inlink->channels; ch++) {
float *dst = (float *)out->extended_data[ch];
float *buf = (float *)s->buffer->extended_data[ch];

for (; i < window_size; i++, j++) {
buf[j] = s->fft_temp[ch][i].re * f;
}
for (n = 0; n < s->hop_size; n++)
dst[n] = buf[n] * (1.f - s->overlap);
memmove(buf, buf + s->hop_size, window_size * 4);
}

start += s->hop_size;
end = j;
}
ret = ff_filter_frame(outlink, out);
if (ret < 0)
goto fail;

s->start = start;
s->end = end;
av_audio_fifo_drain(s->fifo, s->hop_size);

if (start >= window_size) {
float *dst, *buf;
fail:
av_frame_free(&in);
return ret < 0 ? ret : 0;
}

start -= window_size;
end -= window_size;
static int activate(AVFilterContext *ctx)
{
AVFilterLink *inlink = ctx->inputs[0];
AVFilterLink *outlink = ctx->outputs[0];
AFFTFiltContext *s = ctx->priv;
AVFrame *in = NULL;
int ret = 0, status;
int64_t pts;

s->start = start;
s->end = end;
FF_FILTER_FORWARD_STATUS_BACK(outlink, inlink);

out = ff_get_audio_buffer(outlink, window_size);
if (!out) {
ret = AVERROR(ENOMEM);
break;
}
if (!s->eof && av_audio_fifo_size(s->fifo) < s->window_size) {
ret = ff_inlink_consume_frame(inlink, &in);
if (ret < 0)
return ret;

out->pts = s->pts;
s->pts += window_size;
if (ret > 0) {
ret = av_audio_fifo_write(s->fifo, (void **)in->extended_data,
in->nb_samples);
if (ret >= 0 && s->pts == AV_NOPTS_VALUE)
s->pts = in->pts;

for (ch = 0; ch < inlink->channels; ch++) {
dst = (float *)out->extended_data[ch];
buf = (float *)s->buffer->extended_data[ch];
av_frame_free(&in);
if (ret < 0)
return ret;
}
}

for (n = 0; n < window_size; n++) {
dst[n] = buf[n] * (1 - s->overlap);
}
memmove(buf, buf + window_size, window_size * 4);
}
if ((av_audio_fifo_size(s->fifo) >= s->window_size) ||
(av_audio_fifo_size(s->fifo) > 0 && s->eof)) {
ret = filter_frame(inlink);
if (av_audio_fifo_size(s->fifo) >= s->window_size)
ff_filter_set_ready(ctx, 100);
return ret;
}

ret = ff_filter_frame(outlink, out);
if (ret < 0)
break;
if (!s->eof && ff_inlink_acknowledge_status(inlink, &status, &pts)) {
if (status == AVERROR_EOF) {
s->eof = 1;
if (av_audio_fifo_size(s->fifo) >= 0) {
ff_filter_set_ready(ctx, 100);
return 0;
}
}
}

av_audio_fifo_drain(s->fifo, s->hop_size);
if (s->eof && av_audio_fifo_size(s->fifo) <= 0) {
ff_outlink_set_status(outlink, AVERROR_EOF, s->pts);
return 0;
}

av_frame_free(&in);
return ret < 0 ? ret : 0;
if (!s->eof)
FF_FILTER_FORWARD_WANTED(outlink, inlink);

return FFERROR_NOT_READY;
}

static int query_formats(AVFilterContext *ctx)
@@ -450,7 +474,6 @@ static const AVFilterPad inputs[] = {
.name = "default",
.type = AVMEDIA_TYPE_AUDIO,
.config_props = config_input,
.filter_frame = filter_frame,
},
{ NULL }
};
@@ -470,6 +493,7 @@ AVFilter ff_af_afftfilt = {
.priv_class = &afftfilt_class,
.inputs = inputs,
.outputs = outputs,
.activate = activate,
.query_formats = query_formats,
.uninit = uninit,
};

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