generate gnuplot files for subframe residuals
This commit is contained in:
Josh Coalson
parent
73a9935105
commit
6a20d03691
@ -17,6 +17,7 @@
|
||||
*/
|
||||
|
||||
#include <assert.h>
|
||||
#include <math.h>
|
||||
#include <stdio.h>
|
||||
#include <stdlib.h>
|
||||
#include <string.h>
|
||||
@ -28,23 +29,35 @@ typedef struct {
|
||||
unsigned count;
|
||||
} pair_t;
|
||||
|
||||
static pair_t super_buckets[FLAC__MAX_BLOCK_SIZE];
|
||||
static unsigned nsuper_buckets;
|
||||
typedef struct {
|
||||
pair_t buckets[FLAC__MAX_BLOCK_SIZE];
|
||||
int peak_index;
|
||||
unsigned nbuckets;
|
||||
unsigned nsamples;
|
||||
double sum, sos;
|
||||
double variance;
|
||||
double mean;
|
||||
double stddev;
|
||||
} subframe_stats_t;
|
||||
|
||||
static void update_buckets(int32 residual, pair_t *buckets, unsigned *nbuckets, unsigned incr);
|
||||
static bool print_buckets(const pair_t buckets[], const unsigned nbuckets, const char *filename);
|
||||
static subframe_stats_t all_;
|
||||
|
||||
static void init_stats(subframe_stats_t *stats);
|
||||
static void update_stats(subframe_stats_t *stats, int32 residual, unsigned incr);
|
||||
static void compute_stats(subframe_stats_t *stats);
|
||||
static bool dump_stats(const subframe_stats_t *stats, const char *filename);
|
||||
|
||||
void analyze_init()
|
||||
{
|
||||
nsuper_buckets = 0;
|
||||
init_stats(&all_);
|
||||
}
|
||||
|
||||
void analyze_frame(const FLAC__Frame *frame, unsigned frame_number, analysis_options aopts, FILE *fout)
|
||||
{
|
||||
const unsigned channels = frame->header.channels;
|
||||
char outfilename[1024];
|
||||
pair_t buckets[FLAC__MAX_BLOCK_SIZE];
|
||||
unsigned i, channel, nbuckets;
|
||||
subframe_stats_t stats;
|
||||
unsigned i, channel;
|
||||
|
||||
/* do the human-readable part first */
|
||||
fprintf(fout, "frame=%u\tblocksize=%u\tsample_rate=%u\tchannels=%u\tchannel_assignment=%s\n", frame_number, frame->header.blocksize, frame->header.sample_rate, channels, FLAC__ChannelAssignmentString[frame->header.channel_assignment]);
|
||||
@ -83,58 +96,93 @@ void analyze_frame(const FLAC__Frame *frame, unsigned frame_number, analysis_opt
|
||||
if(aopts.do_residual_gnuplot) {
|
||||
for(channel = 0; channel < channels; channel++) {
|
||||
const FLAC__Subframe *subframe = frame->subframes+channel;
|
||||
unsigned residual_samples;
|
||||
|
||||
nbuckets = 0;
|
||||
init_stats(&stats);
|
||||
|
||||
switch(subframe->type) {
|
||||
case FLAC__SUBFRAME_TYPE_FIXED:
|
||||
for(i = 0; i < frame->header.blocksize-subframe->data.fixed.order; i++)
|
||||
update_buckets(subframe->data.fixed.residual[i], buckets, &nbuckets, 1);
|
||||
residual_samples = frame->header.blocksize - subframe->data.fixed.order;
|
||||
for(i = 0; i < residual_samples; i++)
|
||||
update_stats(&stats, subframe->data.fixed.residual[i], 1);
|
||||
break;
|
||||
case FLAC__SUBFRAME_TYPE_LPC:
|
||||
for(i = 0; i < frame->header.blocksize-subframe->data.lpc.order; i++)
|
||||
update_buckets(subframe->data.lpc.residual[i], buckets, &nbuckets, 1);
|
||||
residual_samples = frame->header.blocksize - subframe->data.lpc.order;
|
||||
for(i = 0; i < residual_samples; i++)
|
||||
update_stats(&stats, subframe->data.lpc.residual[i], 1);
|
||||
break;
|
||||
default:
|
||||
break;
|
||||
}
|
||||
|
||||
/* update super_buckets */
|
||||
for(i = 0; i < nbuckets; i++) {
|
||||
update_buckets(buckets[i].residual, super_buckets, &nsuper_buckets, buckets[i].count);
|
||||
/* update all_ */
|
||||
for(i = 0; i < stats.nbuckets; i++) {
|
||||
update_stats(&all_, stats.buckets[i].residual, stats.buckets[i].count);
|
||||
}
|
||||
|
||||
/* write the subframe */
|
||||
sprintf(outfilename, "f%06u.s%u.gp", frame_number, channel);
|
||||
(void)print_buckets(buckets, nbuckets, outfilename);
|
||||
compute_stats(&stats);
|
||||
if(frame_number<50)//@@@
|
||||
(void)dump_stats(&stats, outfilename);
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
void analyze_finish()
|
||||
{
|
||||
(void)print_buckets(super_buckets, nsuper_buckets, "all");
|
||||
compute_stats(&all_);
|
||||
(void)dump_stats(&all_, "all");
|
||||
}
|
||||
|
||||
void update_buckets(int32 residual, pair_t *buckets, unsigned *nbuckets, unsigned incr)
|
||||
void init_stats(subframe_stats_t *stats)
|
||||
{
|
||||
stats->peak_index = -1;
|
||||
stats->nbuckets = 0;
|
||||
stats->nsamples = 0;
|
||||
stats->sum = 0.0;
|
||||
stats->sos = 0.0;
|
||||
}
|
||||
|
||||
void update_stats(subframe_stats_t *stats, int32 residual, unsigned incr)
|
||||
{
|
||||
unsigned i;
|
||||
const double r = (double)residual, a = r*incr;
|
||||
|
||||
for(i = 0; i < *nbuckets; i++) {
|
||||
if(buckets[i].residual == residual) {
|
||||
buckets[i].count += incr;
|
||||
return;
|
||||
stats->nsamples += incr;
|
||||
stats->sum += a;
|
||||
stats->sos += (a*r);
|
||||
|
||||
for(i = 0; i < stats->nbuckets; i++) {
|
||||
if(stats->buckets[i].residual == residual) {
|
||||
stats->buckets[i].count += incr;
|
||||
goto find_peak;
|
||||
}
|
||||
}
|
||||
buckets[*nbuckets].residual = residual;
|
||||
buckets[*nbuckets].count = incr;
|
||||
(*nbuckets)++;
|
||||
/* not found, make a new bucket */
|
||||
i = stats->nbuckets;
|
||||
stats->buckets[i].residual = residual;
|
||||
stats->buckets[i].count = incr;
|
||||
stats->nbuckets++;
|
||||
find_peak:
|
||||
if(stats->peak_index < 0 || stats->buckets[i].count > stats->buckets[stats->peak_index].count)
|
||||
stats->peak_index = i;
|
||||
}
|
||||
|
||||
bool print_buckets(const pair_t buckets[], const unsigned nbuckets, const char *filename)
|
||||
void compute_stats(subframe_stats_t *stats)
|
||||
{
|
||||
stats->mean = stats->sum / (double)stats->nsamples;
|
||||
stats->variance = (stats->sos - (stats->sum * stats->sum / stats->nsamples)) / stats->nsamples;
|
||||
stats->stddev = sqrt(stats->variance);
|
||||
}
|
||||
|
||||
bool dump_stats(const subframe_stats_t *stats, const char *filename)
|
||||
{
|
||||
FILE *outfile;
|
||||
unsigned i;
|
||||
const double m = stats->mean;
|
||||
const double s1 = stats->stddev, s2 = s1*2, s3 = s1*3, s4 = s1*4, s5 = s1*5, s6 = s1*6;
|
||||
const double p = stats->buckets[stats->peak_index].count;
|
||||
|
||||
outfile = fopen(filename, "w");
|
||||
|
||||
@ -143,9 +191,22 @@ bool print_buckets(const pair_t buckets[], const unsigned nbuckets, const char *
|
||||
return false;
|
||||
}
|
||||
|
||||
for(i = 0; i < nbuckets; i++) {
|
||||
fprintf(outfile, "%d %u\n", buckets[i].residual, buckets[i].count);
|
||||
fprintf(outfile, "plot '-' title 'PDF', '-' title 'mean' with impulses, '-' title '1-stddev' with histeps, '-' title '2-stddev' with histeps, '-' title '3-stddev' with histeps, '-' title '4-stddev' with histeps, '-' title '5-stddev' with histeps, '-' title '6-stddev' with histeps\n");
|
||||
|
||||
for(i = 0; i < stats->nbuckets; i++) {
|
||||
fprintf(outfile, "%d %u\n", stats->buckets[i].residual, stats->buckets[i].count);
|
||||
}
|
||||
fprintf(outfile, "e\n");
|
||||
|
||||
fprintf(outfile, "%f %f\ne\n", stats->mean, p);
|
||||
fprintf(outfile, "%f %f\n%f %f\ne\n", m-s1, p*0.8, m+s1, p*0.8);
|
||||
fprintf(outfile, "%f %f\n%f %f\ne\n", m-s2, p*0.7, m+s2, p*0.7);
|
||||
fprintf(outfile, "%f %f\n%f %f\ne\n", m-s3, p*0.6, m+s3, p*0.6);
|
||||
fprintf(outfile, "%f %f\n%f %f\ne\n", m-s4, p*0.5, m+s4, p*0.5);
|
||||
fprintf(outfile, "%f %f\n%f %f\ne\n", m-s5, p*0.4, m+s5, p*0.4);
|
||||
fprintf(outfile, "%f %f\n%f %f\ne\n", m-s6, p*0.3, m+s6, p*0.3);
|
||||
|
||||
fprintf(outfile, "pause -1 'waiting...'\n");
|
||||
|
||||
fclose(outfile);
|
||||
return true;
|
||||
|
||||
Loading…
Reference in New Issue
Block a user