FFTContext *fft, *ifft;
FFTComplex **fft_data;
+ FFTComplex **fft_temp;
int nb_exprs;
int window_size;
AVExpr **real;
float *window_func_lut;
} AFFTFiltContext;
-static const char *const var_names[] = { "sr", "b", "nb", "ch", "chs", "pts", NULL };
-enum { VAR_SAMPLE_RATE, VAR_BIN, VAR_NBBINS, VAR_CHANNEL, VAR_CHANNELS, VAR_PTS, VAR_VARS_NB };
+static const char *const var_names[] = { "sr", "b", "nb", "ch", "chs", "pts", "re", "im", NULL };
+enum { VAR_SAMPLE_RATE, VAR_BIN, VAR_NBBINS, VAR_CHANNEL, VAR_CHANNELS, VAR_PTS, VAR_REAL, VAR_IMAG, VAR_VARS_NB };
#define OFFSET(x) offsetof(AFFTFiltContext, x)
#define A AV_OPT_FLAG_AUDIO_PARAM|AV_OPT_FLAG_FILTERING_PARAM
static const AVOption afftfilt_options[] = {
- { "real", "set channels real expressions", OFFSET(real_str), AV_OPT_TYPE_STRING, {.str = "1" }, 0, 0, A },
- { "imag", "set channels imaginary expressions", OFFSET(img_str), AV_OPT_TYPE_STRING, {.str = NULL }, 0, 0, A },
+ { "real", "set channels real expressions", OFFSET(real_str), AV_OPT_TYPE_STRING, {.str = "re" }, 0, 0, A },
+ { "imag", "set channels imaginary expressions", OFFSET(img_str), AV_OPT_TYPE_STRING, {.str = "im" }, 0, 0, A },
{ "win_size", "set window size", OFFSET(fft_bits), AV_OPT_TYPE_INT, {.i64=12}, 4, 17, A, "fft" },
{ "w16", 0, 0, AV_OPT_TYPE_CONST, {.i64=4}, 0, 0, A, "fft" },
{ "w32", 0, 0, AV_OPT_TYPE_CONST, {.i64=5}, 0, 0, A, "fft" },
{ "hann", "Hann", 0, AV_OPT_TYPE_CONST, {.i64=WFUNC_HANNING}, 0, 0, A, "win_func" },
{ "hanning", "Hanning", 0, AV_OPT_TYPE_CONST, {.i64=WFUNC_HANNING}, 0, 0, A, "win_func" },
{ "hamming", "Hamming", 0, AV_OPT_TYPE_CONST, {.i64=WFUNC_HAMMING}, 0, 0, A, "win_func" },
+ { "blackman", "Blackman", 0, AV_OPT_TYPE_CONST, {.i64=WFUNC_BLACKMAN}, 0, 0, A, "win_func" },
+ { "welch", "Welch", 0, AV_OPT_TYPE_CONST, {.i64=WFUNC_WELCH}, 0, 0, A, "win_func" },
+ { "flattop", "Flat-top", 0, AV_OPT_TYPE_CONST, {.i64=WFUNC_FLATTOP}, 0, 0, A, "win_func" },
+ { "bharris", "Blackman-Harris", 0, AV_OPT_TYPE_CONST, {.i64=WFUNC_BHARRIS}, 0, 0, A, "win_func" },
+ { "bnuttall", "Blackman-Nuttall", 0, AV_OPT_TYPE_CONST, {.i64=WFUNC_BNUTTALL}, 0, 0, A, "win_func" },
+ { "bhann", "Bartlett-Hann", 0, AV_OPT_TYPE_CONST, {.i64=WFUNC_BHANN}, 0, 0, A, "win_func" },
{ "sine", "Sine", 0, AV_OPT_TYPE_CONST, {.i64=WFUNC_SINE}, 0, 0, A, "win_func" },
+ { "nuttall", "Nuttall", 0, AV_OPT_TYPE_CONST, {.i64=WFUNC_NUTTALL}, 0, 0, A, "win_func" },
+ { "lanczos", "Lanczos", 0, AV_OPT_TYPE_CONST, {.i64=WFUNC_LANCZOS}, 0, 0, A, "win_func" },
+ { "gauss", "Gauss", 0, AV_OPT_TYPE_CONST, {.i64=WFUNC_GAUSS}, 0, 0, A, "win_func" },
+ { "tukey", "Tukey", 0, AV_OPT_TYPE_CONST, {.i64=WFUNC_TUKEY}, 0, 0, A, "win_func" },
+ { "dolph", "Dolph-Chebyshev", 0, AV_OPT_TYPE_CONST, {.i64=WFUNC_DOLPH}, 0, 0, A, "win_func" },
+ { "cauchy", "Cauchy", 0, AV_OPT_TYPE_CONST, {.i64=WFUNC_CAUCHY}, 0, 0, A, "win_func" },
+ { "parzen", "Parzen", 0, AV_OPT_TYPE_CONST, {.i64=WFUNC_PARZEN}, 0, 0, A, "win_func" },
+ { "poisson", "Poisson", 0, AV_OPT_TYPE_CONST, {.i64=WFUNC_POISSON}, 0, 0, A, "win_func" },
+ { "bohman", "Bohman", 0, AV_OPT_TYPE_CONST, {.i64=WFUNC_BOHMAN}, 0, 0, A, "win_func" },
{ "overlap", "set window overlap", OFFSET(overlap), AV_OPT_TYPE_FLOAT, {.dbl=0.75}, 0, 1, A },
{ NULL },
};
AVFILTER_DEFINE_CLASS(afftfilt);
+static inline double getreal(void *priv, double x, double ch)
+{
+ AFFTFiltContext *s = priv;
+ int ich, ix;
+
+ ich = av_clip(ch, 0, s->nb_exprs - 1);
+ ix = av_clip(x, 0, s->window_size / 2);
+
+ return s->fft_data[ich][ix].re;
+}
+
+static inline double getimag(void *priv, double x, double ch)
+{
+ AFFTFiltContext *s = priv;
+ int ich, ix;
+
+ ich = av_clip(ch, 0, s->nb_exprs - 1);
+ ix = av_clip(x, 0, s->window_size / 2);
+
+ return s->fft_data[ich][ix].im;
+}
+
+static double realf(void *priv, double x, double ch) { return getreal(priv, x, ch); }
+static double imagf(void *priv, double x, double ch) { return getimag(priv, x, ch); }
+
+static const char *const func2_names[] = { "real", "imag", NULL };
+double (*func2[])(void *, double, double) = { realf, imagf, NULL };
+
static int config_input(AVFilterLink *inlink)
{
AVFilterContext *ctx = inlink->dst;
char *args;
const char *last_expr = "1";
+ s->pts = AV_NOPTS_VALUE;
s->fft = av_fft_init(s->fft_bits, 0);
s->ifft = av_fft_init(s->fft_bits, 1);
if (!s->fft || !s->ifft)
if (!s->fft_data)
return AVERROR(ENOMEM);
+ s->fft_temp = av_calloc(inlink->channels, sizeof(*s->fft_temp));
+ if (!s->fft_temp)
+ return AVERROR(ENOMEM);
+
for (ch = 0; ch < inlink->channels; ch++) {
s->fft_data[ch] = av_calloc(s->window_size, sizeof(**s->fft_data));
if (!s->fft_data[ch])
return AVERROR(ENOMEM);
}
+ for (ch = 0; ch < inlink->channels; ch++) {
+ s->fft_temp[ch] = av_calloc(s->window_size, sizeof(**s->fft_temp));
+ if (!s->fft_temp[ch])
+ return AVERROR(ENOMEM);
+ }
+
s->real = av_calloc(inlink->channels, sizeof(*s->real));
if (!s->real)
return AVERROR(ENOMEM);
char *arg = av_strtok(ch == 0 ? args : NULL, "|", &saveptr);
ret = av_expr_parse(&s->real[ch], arg ? arg : last_expr, var_names,
- NULL, NULL, NULL, NULL, 0, ctx);
+ NULL, NULL, func2_names, func2, 0, ctx);
if (ret < 0)
break;
if (arg)
char *arg = av_strtok(ch == 0 ? args : NULL, "|", &saveptr);
ret = av_expr_parse(&s->imag[ch], arg ? arg : last_expr, var_names,
- NULL, NULL, NULL, NULL, 0, ctx);
+ NULL, NULL, func2_names, func2, 0, ctx);
if (ret < 0)
break;
if (arg)
int ch, n, ret, i, j, k;
int start = s->start, end = s->end;
+ if (s->pts == AV_NOPTS_VALUE)
+ s->pts = frame->pts;
+
ret = av_audio_fifo_write(s->fifo, (void **)frame->extended_data, frame->nb_samples);
av_frame_free(&frame);
if (ret < 0)
for (ch = 0; ch < inlink->channels; ch++) {
FFTComplex *fft_data = s->fft_data[ch];
- float *buf = (float *)s->buffer->extended_data[ch];
- int x;
-
- values[VAR_CHANNEL] = ch;
av_fft_permute(s->fft, fft_data);
av_fft_calc(s->fft, fft_data);
+ }
+
+ 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 (n = 0; n < window_size / 2; n++) {
+ for (n = 0; n <= window_size / 2; n++) {
float fr, fi;
values[VAR_BIN] = n;
+ values[VAR_REAL] = fft_data[n].re;
+ values[VAR_IMAG] = fft_data[n].im;
fr = av_expr_eval(s->real[ch], values, s);
fi = av_expr_eval(s->imag[ch], values, s);
- fft_data[n].re *= fr;
- fft_data[n].im *= fi;
+ fft_temp[n].re = fr;
+ fft_temp[n].im = fi;
}
for (n = window_size / 2 + 1, x = window_size / 2 - 1; n < window_size; n++, x--) {
- fft_data[n].re = fft_data[x].re;
- fft_data[n].im = -fft_data[x].im;
+ fft_temp[n].re = fft_temp[x].re;
+ fft_temp[n].im = -fft_temp[x].im;
}
- av_fft_permute(s->ifft, fft_data);
- av_fft_calc(s->ifft, fft_data);
+ av_fft_permute(s->ifft, fft_temp);
+ av_fft_calc(s->ifft, fft_temp);
start = s->start;
end = s->end;
k = end;
for (i = 0, j = start; j < k && i < window_size; i++, j++) {
- buf[j] += s->fft_data[ch][i].re * f;
+ buf[j] += s->fft_temp[ch][i].re * f;
}
for (; i < window_size; i++, j++) {
- buf[j] = s->fft_data[ch][i].re * f;
+ buf[j] = s->fft_temp[ch][i].re * f;
}
start += s->hop_size;
for (i = 0; i < s->nb_exprs; i++) {
if (s->fft_data)
av_freep(&s->fft_data[i]);
+ if (s->fft_temp)
+ av_freep(&s->fft_temp[i]);
}
av_freep(&s->fft_data);
+ av_freep(&s->fft_temp);
for (i = 0; i < s->nb_exprs; i++) {
av_expr_free(s->real[i]);
projects / ffmpeg / blobdiff