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avfilter/firequalizer: add dumpfile and dumpscale option 

Signed-off-by: Muhammad Faiz <mfcc64@gmail.com>
This commit is contained in:
Muhammad Faiz 2016-10-18 01:13:19 +07:00
parent acd74f9200
commit d3be186ed1
2 changed files with 90 additions and 14 deletions
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7
doc/filters.texi
View File

@ -2576,6 +2576,13 @@ logarithmic (in octave scale where 20 Hz is 0) frequency, linear gain
@item loglog
logarithmic frequency, logarithmic gain
@end table
@item dumpfile
Set file for dumping, suitable for gnuplot.
@item dumpscale
Set scale for dumpfile. Acceptable values are same with scale option.
Default is linlog.
@end table
@subsection Examples

97
libavfilter/af_firequalizer.c
View File

@ -65,6 +65,7 @@ typedef struct {
typedef struct {
const AVClass *class;
RDFTContext *analysis_rdft;
RDFTContext *analysis_irdft;
RDFTContext *rdft;
RDFTContext *irdft;
@ -72,6 +73,7 @@ typedef struct {
int rdft_len;
float *analysis_buf;
float *dump_buf;
float *kernel_tmp_buf;
float *kernel_buf;
float *conv_buf;
@ -93,6 +95,8 @@ typedef struct {
int multi;
int zero_phase;
int scale;
char *dumpfile;
int dumpscale;
int nb_gain_entry;
int gain_entry_err;
@ -126,6 +130,8 @@ static const AVOption firequalizer_options[] = {
{ "linlog", "linear-freq logarithmic-gain", 0, AV_OPT_TYPE_CONST, { .i64 = SCALE_LINLOG }, 0, 0, FLAGS, "scale" },
{ "loglin", "logarithmic-freq linear-gain", 0, AV_OPT_TYPE_CONST, { .i64 = SCALE_LOGLIN }, 0, 0, FLAGS, "scale" },
{ "loglog", "logarithmic-freq logarithmic-gain", 0, AV_OPT_TYPE_CONST, { .i64 = SCALE_LOGLOG }, 0, 0, FLAGS, "scale" },
{ "dumpfile", "set dump file", OFFSET(dumpfile), AV_OPT_TYPE_STRING, { .str = NULL }, 0, 0, FLAGS },
{ "dumpscale", "set dump scale", OFFSET(dumpscale), AV_OPT_TYPE_INT, { .i64 = SCALE_LINLOG }, 0, NB_SCALE-1, FLAGS, "scale" },
{ NULL }
};
@ -133,12 +139,14 @@ AVFILTER_DEFINE_CLASS(firequalizer);
static void common_uninit(FIREqualizerContext *s)
{
av_rdft_end(s->analysis_rdft);
av_rdft_end(s->analysis_irdft);
av_rdft_end(s->rdft);
av_rdft_end(s->irdft);
s->analysis_irdft = s->rdft = s->irdft = NULL;
s->analysis_rdft = s->analysis_irdft = s->rdft = s->irdft = NULL;
av_freep(&s->analysis_buf);
av_freep(&s->dump_buf);
av_freep(&s->kernel_tmp_buf);
av_freep(&s->kernel_buf);
av_freep(&s->conv_buf);
@ -223,6 +231,53 @@ static void fast_convolute(FIREqualizerContext *s, const float *kernel_buf, floa
}
}
static void dump_fir(AVFilterContext *ctx, FILE *fp, int ch)
{
FIREqualizerContext *s = ctx->priv;
int rate = ctx->inputs[0]->sample_rate;
int xlog = s->dumpscale == SCALE_LOGLIN || s->dumpscale == SCALE_LOGLOG;
int ylog = s->dumpscale == SCALE_LINLOG || s->dumpscale == SCALE_LOGLOG;
int x;
int center = s->fir_len / 2;
double delay = s->zero_phase ? 0.0 : (double) center / rate;
double vx, ya, yb;
s->analysis_buf[0] *= s->rdft_len/2;
for (x = 1; x <= center; x++) {
s->analysis_buf[x] *= s->rdft_len/2;
s->analysis_buf[s->analysis_rdft_len - x] *= s->rdft_len/2;
}
if (ch)
fprintf(fp, "\n\n");
fprintf(fp, "# time[%d] (time amplitude)\n", ch);
for (x = center; x > 0; x--)
fprintf(fp, "%15.10f %15.10f\n", delay - (double) x / rate, (double) s->analysis_buf[s->analysis_rdft_len - x]);
for (x = 0; x <= center; x++)
fprintf(fp, "%15.10f %15.10f\n", delay + (double)x / rate , (double) s->analysis_buf[x]);
av_rdft_calc(s->analysis_rdft, s->analysis_buf);
fprintf(fp, "\n\n# freq[%d] (frequency desired_gain actual_gain)\n", ch);
for (x = 0; x <= s->analysis_rdft_len/2; x++) {
int i = (x == s->analysis_rdft_len/2) ? 1 : 2 * x;
vx = (double)x * rate / s->analysis_rdft_len;
if (xlog)
vx = log2(0.05*vx);
ya = s->dump_buf[i];
yb = s->analysis_buf[i];
if (ylog) {
ya = 20.0 * log10(fabs(ya));
yb = 20.0 * log10(fabs(yb));
}
fprintf(fp, "%17.10f %17.10f %17.10f\n", vx, ya, yb);
}
}
static double entry_func(void *p, double freq, double gain)
{
AVFilterContext *ctx = p;
@ -332,6 +387,7 @@ static int generate_kernel(AVFilterContext *ctx, const char *gain, const char *g
int ret, k, center, ch;
int xlog = s->scale == SCALE_LOGLIN || s->scale == SCALE_LOGLOG;
int ylog = s->scale == SCALE_LINLOG || s->scale == SCALE_LOGLOG;
FILE *dump_fp = NULL;
s->nb_gain_entry = 0;
s->gain_entry_err = 0;
@ -352,10 +408,14 @@ static int generate_kernel(AVFilterContext *ctx, const char *gain, const char *g
if (ret < 0)
return ret;
if (s->dumpfile && (!s->dump_buf || !s->analysis_rdft || !(dump_fp = fopen(s->dumpfile, "w"))))
av_log(ctx, AV_LOG_WARNING, "dumping failed.\n");
vars[VAR_CHS] = inlink->channels;
vars[VAR_CHLAYOUT] = inlink->channel_layout;
vars[VAR_SR] = inlink->sample_rate;
for (ch = 0; ch < inlink->channels; ch++) {
float *rdft_buf = s->kernel_tmp_buf + ch * s->rdft_len;
double result;
vars[VAR_CH] = ch;
vars[VAR_CHID] = av_channel_layout_extract_channel(inlink->channel_layout, ch);
@ -380,6 +440,9 @@ static int generate_kernel(AVFilterContext *ctx, const char *gain, const char *g
s->analysis_buf[2*k+1] = 0.0;
}
if (s->dump_buf)
memcpy(s->dump_buf, s->analysis_buf, s->analysis_rdft_len * sizeof(*s->analysis_buf));
av_rdft_calc(s->analysis_irdft, s->analysis_buf);
center = s->fir_len / 2;
@ -421,35 +484,36 @@ static int generate_kernel(AVFilterContext *ctx, const char *gain, const char *g
av_assert0(0);
}
s->analysis_buf[k] *= (2.0/s->analysis_rdft_len) * (2.0/s->rdft_len) * win;
if (k)
s->analysis_buf[s->analysis_rdft_len - k] = s->analysis_buf[k];
}
for (k = 0; k < center - k; k++) {
float tmp = s->analysis_buf[k];
s->analysis_buf[k] = s->analysis_buf[center - k];
s->analysis_buf[center - k] = tmp;
}
for (k = 1; k <= center; k++)
s->analysis_buf[center + k] = s->analysis_buf[center - k];
memset(s->analysis_buf + s->fir_len, 0, (s->rdft_len - s->fir_len) * sizeof(*s->analysis_buf));
av_rdft_calc(s->rdft, s->analysis_buf);
memset(s->analysis_buf + center + 1, 0, (s->analysis_rdft_len - s->fir_len) * sizeof(*s->analysis_buf));
memcpy(rdft_buf, s->analysis_buf + s->analysis_rdft_len - center, center * sizeof(*s->analysis_buf));
memcpy(rdft_buf + center, s->analysis_buf, (s->rdft_len - center) * sizeof(*s->analysis_buf));
av_rdft_calc(s->rdft, rdft_buf);
for (k = 0; k < s->rdft_len; k++) {
if (isnan(s->analysis_buf[k]) || isinf(s->analysis_buf[k])) {
if (isnan(rdft_buf[k]) || isinf(rdft_buf[k])) {
av_log(ctx, AV_LOG_ERROR, "filter kernel contains nan or infinity.\n");
av_expr_free(gain_expr);
if (dump_fp)
fclose(dump_fp);
return AVERROR(EINVAL);
}
}
memcpy(s->kernel_tmp_buf + ch * s->rdft_len, s->analysis_buf, s->rdft_len * sizeof(*s->analysis_buf));
if (dump_fp)
dump_fir(ctx, dump_fp, ch);
if (!s->multi)
break;
}
memcpy(s->kernel_buf, s->kernel_tmp_buf, (s->multi ? inlink->channels : 1) * s->rdft_len * sizeof(*s->kernel_buf));
av_expr_free(gain_expr);
if (dump_fp)
fclose(dump_fp);
return 0;
}
@ -499,6 +563,11 @@ static int config_input(AVFilterLink *inlink)
if (!(s->analysis_irdft = av_rdft_init(rdft_bits, IDFT_C2R)))
return AVERROR(ENOMEM);
if (s->dumpfile) {
s->analysis_rdft = av_rdft_init(rdft_bits, DFT_R2C);
s->dump_buf = av_malloc_array(s->analysis_rdft_len, sizeof(*s->dump_buf));
}
s->analysis_buf = av_malloc_array(s->analysis_rdft_len, sizeof(*s->analysis_buf));
s->kernel_tmp_buf = av_malloc_array(s->rdft_len * (s->multi ? inlink->channels : 1), sizeof(*s->kernel_tmp_buf));
s->kernel_buf = av_malloc_array(s->rdft_len * (s->multi ? inlink->channels : 1), sizeof(*s->kernel_buf));